<p>Harald Welte <strong>merged</strong> this change.</p><p><a href="https://gerrit.osmocom.org/11642">View Change</a></p><div style="white-space:pre-wrap">Approvals:
Jenkins Builder: Verified
Harald Welte: Looks good to me, approved
</div><pre style="font-family: monospace,monospace; white-space: pre-wrap;">Add SGs Interface<br><br>Add an SGs interface (3GPP TS 29.118) to osmo-msc in order to support<br>SMS tunneling and Circuit Switched Fallback (CSFB)<br><br>Change-Id: I73359925fc1ca72b33a1466e6ac41307f2f0b11d<br>Related: OS#3615<br>---<br>M include/osmocom/msc/Makefile.am<br>M include/osmocom/msc/debug.h<br>M include/osmocom/msc/gsm_04_08.h<br>M include/osmocom/msc/gsm_subscriber.h<br>M include/osmocom/msc/ran_conn.h<br>A include/osmocom/msc/sgs_iface.h<br>A include/osmocom/msc/sgs_server.h<br>A include/osmocom/msc/sgs_vty.h<br>M include/osmocom/msc/vlr.h<br>A include/osmocom/msc/vlr_sgs.h<br>M include/osmocom/msc/vty.h<br>M src/libmsc/Makefile.am<br>M src/libmsc/gsm_04_08.c<br>M src/libmsc/gsm_04_08_cc.c<br>M src/libmsc/gsm_04_11.c<br>M src/libmsc/gsm_09_11.c<br>M src/libmsc/gsm_subscriber.c<br>M src/libmsc/msc_ifaces.c<br>M src/libmsc/msc_vty.c<br>M src/libmsc/ran_conn.c<br>A src/libmsc/sgs_iface.c<br>A src/libmsc/sgs_server.c<br>A src/libmsc/sgs_vty.c<br>M src/libmsc/silent_call.c<br>M src/libvlr/Makefile.am<br>M src/libvlr/vlr.c<br>M src/libvlr/vlr_lu_fsm.c<br>A src/libvlr/vlr_sgs.c<br>A src/libvlr/vlr_sgs_fsm.c<br>A src/libvlr/vlr_sgs_fsm.h<br>M src/osmo-msc/Makefile.am<br>M src/osmo-msc/msc_main.c<br>M tests/msc_vlr/Makefile.am<br>M tests/msc_vlr/msc_vlr_test_authen_reuse.c<br>M tests/msc_vlr/msc_vlr_test_call.c<br>M tests/msc_vlr/msc_vlr_test_gsm_authen.c<br>M tests/msc_vlr/msc_vlr_test_gsm_ciph.c<br>M tests/msc_vlr/msc_vlr_test_hlr_reject.c<br>M tests/msc_vlr/msc_vlr_test_hlr_timeout.c<br>M tests/msc_vlr/msc_vlr_test_ms_timeout.c<br>M tests/msc_vlr/msc_vlr_test_no_authen.c<br>M tests/msc_vlr/msc_vlr_test_reject_concurrency.c<br>M tests/msc_vlr/msc_vlr_test_rest.c<br>M tests/msc_vlr/msc_vlr_test_ss.c<br>M tests/msc_vlr/msc_vlr_test_umts_authen.c<br>A tests/msc_vlr/stubs.h<br>M tests/sms_queue/sms_queue_test.c<br>M tests/test_nodes.vty<br>48 files changed, 2,939 insertions(+), 22 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/include/osmocom/msc/Makefile.am b/include/osmocom/msc/Makefile.am</span><br><span>index 13ac166..408d710 100644</span><br><span>--- a/include/osmocom/msc/Makefile.am</span><br><span>+++ b/include/osmocom/msc/Makefile.am</span><br><span>@@ -23,11 +23,15 @@</span><br><span> a_reset.h \</span><br><span> ran_conn.h \</span><br><span> rrlp.h \</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_iface.h \</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_server.h \</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_vty.h \</span><br><span> signal.h \</span><br><span> silent_call.h \</span><br><span> smpp.h \</span><br><span> sms_queue.h \</span><br><span> transaction.h \</span><br><span> vlr.h \</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs.h \</span><br><span> vty.h \</span><br><span> $(NULL)</span><br><span>diff --git a/include/osmocom/msc/debug.h b/include/osmocom/msc/debug.h</span><br><span>index 717cf74..28ba482 100644</span><br><span>--- a/include/osmocom/msc/debug.h</span><br><span>+++ b/include/osmocom/msc/debug.h</span><br><span>@@ -21,5 +21,6 @@</span><br><span> DVLR,</span><br><span> DIUCS,</span><br><span> DBSSAP,</span><br><span style="color: hsl(120, 100%, 40%);">+ DSGS,</span><br><span> Debug_LastEntry,</span><br><span> };</span><br><span>diff --git a/include/osmocom/msc/gsm_04_08.h b/include/osmocom/msc/gsm_04_08.h</span><br><span>index 5ff16de..2d4a0cd 100644</span><br><span>--- a/include/osmocom/msc/gsm_04_08.h</span><br><span>+++ b/include/osmocom/msc/gsm_04_08.h</span><br><span>@@ -77,5 +77,6 @@</span><br><span> </span><br><span> int gsm48_tch_rtp_create(struct gsm_trans *trans);</span><br><span> int gsm48_conn_sendmsg(struct msgb *msg, struct ran_conn *conn, struct gsm_trans *trans);</span><br><span style="color: hsl(120, 100%, 40%);">+struct msgb *gsm48_create_mm_info(struct gsm_network *net);</span><br><span> </span><br><span> #endif</span><br><span>diff --git a/include/osmocom/msc/gsm_subscriber.h b/include/osmocom/msc/gsm_subscriber.h</span><br><span>index 2051067..f848ac8 100644</span><br><span>--- a/include/osmocom/msc/gsm_subscriber.h</span><br><span>+++ b/include/osmocom/msc/gsm_subscriber.h</span><br><span>@@ -5,6 +5,7 @@</span><br><span> </span><br><span> #include <osmocom/core/linuxlist.h></span><br><span> #include <osmocom/gsm/protocol/gsm_23_003.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/protocol/gsm_29_118.h></span><br><span> </span><br><span> #include <osmocom/msc/gsm_data.h></span><br><span> </span><br><span>@@ -36,8 +37,8 @@</span><br><span> */</span><br><span> struct subscr_request *subscr_request_conn(struct vlr_subscr *vsub,</span><br><span> gsm_cbfn *cbfn, void *param,</span><br><span style="color: hsl(0, 100%, 40%);">- const char *label);</span><br><span style="color: hsl(0, 100%, 40%);">-</span><br><span style="color: hsl(120, 100%, 40%);">+ const char *label,</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_service_ind serv_ind);</span><br><span> void subscr_remove_request(struct subscr_request *req);</span><br><span> </span><br><span> void subscr_paging_cancel(struct vlr_subscr *vsub, enum gsm_paging_event event);</span><br><span>diff --git a/include/osmocom/msc/ran_conn.h b/include/osmocom/msc/ran_conn.h</span><br><span>index affebc8..fca7ab6 100644</span><br><span>--- a/include/osmocom/msc/ran_conn.h</span><br><span>+++ b/include/osmocom/msc/ran_conn.h</span><br><span>@@ -208,6 +208,7 @@</span><br><span> </span><br><span> void ran_conn_rx_bssmap_clear_complete(struct ran_conn *conn);</span><br><span> void ran_conn_rx_iu_release_complete(struct ran_conn *conn);</span><br><span style="color: hsl(120, 100%, 40%);">+void ran_conn_sgs_release_sent(struct ran_conn *conn);</span><br><span> </span><br><span> enum ran_conn_use {</span><br><span> RAN_CONN_USE_UNTRACKED = -1,</span><br><span>diff --git a/include/osmocom/msc/sgs_iface.h b/include/osmocom/msc/sgs_iface.h</span><br><span>new file mode 100644</span><br><span>index 0000000..a167cd6</span><br><span>--- /dev/null</span><br><span>+++ b/include/osmocom/msc/sgs_iface.h</span><br><span>@@ -0,0 +1,87 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#pragma once</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/protocol/gsm_23_003.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/protocol/gsm_29_118.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr_sgs.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/socket.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static const unsigned int sgs_state_timer_defaults[_NUM_SGS_STATE_TIMERS] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_TS5] = SGS_TS5_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_TS6_2] = SGS_TS6_2_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_TS7] = SGS_TS7_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_TS11] = SGS_TS11_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_TS14] = SGS_TS14_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_TS15] = SGS_TS15_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static const unsigned int sgs_state_counter_defaults[_NUM_SGS_STATE_COUNTERS] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_NS7] = SGS_NS7_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_STATE_NS11] = SGS_NS11_DEFAULT,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_connection {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* global list of SGs connections */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct llist_head entry;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* back-pointer */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Socket name from osmo_sock_get_name() */</span><br><span style="color: hsl(120, 100%, 40%);">+ char sockname[OSMO_SOCK_NAME_MAXLEN];</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* MME for this connection, if any. This field is NULL until we</span><br><span style="color: hsl(120, 100%, 40%);">+ * receive the first "MME name" IE from the MME, which could be part</span><br><span style="color: hsl(120, 100%, 40%);">+ * of the RESET procedure, but also just a normal LU request. */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* represents the SCTP connection we accept()ed from this MME */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_stream_srv *srv;</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_mme_ctx {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* global list of MME contexts */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct llist_head entry;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* back-pointer */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* MME name as string representation */</span><br><span style="color: hsl(120, 100%, 40%);">+ char fqdn[GSM23003_MME_DOMAIN_LEN + 1];</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* current connection for this MME, if any. Can be NULL if the SCTP</span><br><span style="color: hsl(120, 100%, 40%);">+ * connection to the MME was lost and hasn't been re-established yet */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_connection *conn;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FSM for the "VLR reset" procedure" */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_fsm_inst *fi;</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int ns11_remaining;</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+extern struct sgs_state *g_sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_state *sgs_iface_init(void *ctx, struct gsm_network *network);</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_iface_rx(struct sgs_connection *sgc, struct msgb *msg);</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_iface_tx_paging(struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind);</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_iface_tx_dtap_ud(struct msgb *msg);</span><br><span style="color: hsl(120, 100%, 40%);">+void sgs_iface_tx_release(struct ran_conn *conn);</span><br><span>diff --git a/include/osmocom/msc/sgs_server.h b/include/osmocom/msc/sgs_server.h</span><br><span>new file mode 100644</span><br><span>index 0000000..a89022d</span><br><span>--- /dev/null</span><br><span>+++ b/include/osmocom/msc/sgs_server.h</span><br><span>@@ -0,0 +1,53 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#pragma once</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <arpa/inet.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/protocol/gsm_29_118.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define DEFAULT_SGS_SERVER_IP "0.0.0.0"</span><br><span style="color: hsl(120, 100%, 40%);">+#define DEFAULT_SGS_SERVER_VLR_NAME "vlr.example.net"</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* global SGs state */</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_state {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* list of MMEs (sgs_mme_ctx) */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct llist_head mme_list;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* list of SCTP client connections */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct llist_head conn_list;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* SCTP server for inbound SGs connections */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_stream_srv_link *srv_link;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ struct {</span><br><span style="color: hsl(120, 100%, 40%);">+ char local_addr[INET6_ADDRSTRLEN];</span><br><span style="color: hsl(120, 100%, 40%);">+ uint16_t local_port;</span><br><span style="color: hsl(120, 100%, 40%);">+ /* user-configured VLR name (FQDN) */</span><br><span style="color: hsl(120, 100%, 40%);">+ char vlr_name[SGS_VLR_NAME_MAXLEN];</span><br><span style="color: hsl(120, 100%, 40%);">+ /* timers on VLR side */</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int timer[_NUM_SGS_STATE_TIMERS];</span><br><span style="color: hsl(120, 100%, 40%);">+ /* countrs on VLR side */</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int counter[_NUM_SGS_STATE_COUNTERS];</span><br><span style="color: hsl(120, 100%, 40%);">+ } cfg;</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_state *sgs_server_alloc(void *ctx);</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_server_open(struct sgs_state *sgs);</span><br><span>diff --git a/include/osmocom/msc/sgs_vty.h b/include/osmocom/msc/sgs_vty.h</span><br><span>new file mode 100644</span><br><span>index 0000000..daf69c1</span><br><span>--- /dev/null</span><br><span>+++ b/include/osmocom/msc/sgs_vty.h</span><br><span>@@ -0,0 +1,23 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#pragma once</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+void sgs_vty_init(void);</span><br><span>diff --git a/include/osmocom/msc/vlr.h b/include/osmocom/msc/vlr.h</span><br><span>index 83c8e1b..3529640 100644</span><br><span>--- a/include/osmocom/msc/vlr.h</span><br><span>+++ b/include/osmocom/msc/vlr.h</span><br><span>@@ -13,6 +13,7 @@</span><br><span> #include <osmocom/msc/ran_conn.h></span><br><span> #include <osmocom/msc/msc_common.h></span><br><span> #include <osmocom/gsupclient/gsup_client.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr_sgs.h></span><br><span> </span><br><span> #define LOGGSUPP(level, gsup, fmt, args...) \</span><br><span> LOGP(DVLR, level, "GSUP(%s) " fmt, (gsup)->imsi, ## args)</span><br><span>@@ -162,6 +163,7 @@</span><br><span> struct osmo_fsm_inst *lu_fsm;</span><br><span> struct osmo_fsm_inst *auth_fsm;</span><br><span> struct osmo_fsm_inst *proc_arq_fsm;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_fsm_inst *sgs_fsm;</span><br><span> </span><br><span> bool lu_complete;</span><br><span> time_t expire_lu;</span><br><span>@@ -182,6 +184,17 @@</span><br><span> uint8_t lac;</span><br><span> enum osmo_rat_type attached_via_ran;</span><br><span> } cs;</span><br><span style="color: hsl(120, 100%, 40%);">+ /* SGs (MME) specific parts */</span><br><span style="color: hsl(120, 100%, 40%);">+ struct {</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_sgs_cfg cfg;</span><br><span style="color: hsl(120, 100%, 40%);">+ char mme_name[SGS_MME_NAME_LEN + 1];</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_location_area_id lai;</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_lu_response_cb_t response_cb;</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_lu_paging_cb_t paging_cb;</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_lu_mminfo_cb_t mminfo_cb;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_service_ind paging_serv_ind;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_timer_list Ts5;</span><br><span style="color: hsl(120, 100%, 40%);">+ } sgs;</span><br><span> </span><br><span> struct gsm_classmark classmark;</span><br><span> };</span><br><span>diff --git a/include/osmocom/msc/vlr_sgs.h b/include/osmocom/msc/vlr_sgs.h</span><br><span>new file mode 100644</span><br><span>index 0000000..cc07807</span><br><span>--- /dev/null</span><br><span>+++ b/include/osmocom/msc/vlr_sgs.h</span><br><span>@@ -0,0 +1,107 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#pragma once</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/gsm29118.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+enum vlr_lu_type;</span><br><span style="color: hsl(120, 100%, 40%);">+struct vlr_subscr;</span><br><span style="color: hsl(120, 100%, 40%);">+struct vlr_instance;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* See also 3GPP TS 29.118, chapter 4.2.2 States at the VLR */</span><br><span style="color: hsl(120, 100%, 40%);">+enum sgs_ue_fsm_state {</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_ST_NULL,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_ST_ASSOCIATED,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_ST_LA_UPD_PRES,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+enum vlr_sgs_state_tmr {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Started when sending the SGsAP-PAGING-REQUEST, implemented in vlr_sgs.c */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_TS5,</span><br><span style="color: hsl(120, 100%, 40%);">+ /* TMSI reallocation, 5.2.3.5, implemented by fsm in vlr_sgs_fsm.c */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_TS6_2,</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Started when SGsAP-ALERT-REQUEST is sent 5.3.2.1, not implemented yet */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_TS7,</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Reset ack timeout, implemnted in sgs_iface.c */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_TS11,</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Started when SGsAP-SERVICE-REQUEST is received 5.15.1, not implemented yet */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_TS14,</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Started when SGsAP-MO-CSFB-INDICATION is received 5.16.3 (UE fallback, not implemented yet) */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_TS15,</span><br><span style="color: hsl(120, 100%, 40%);">+ _NUM_SGS_STATE_TIMERS</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+enum vlr_sgs_state_ctr {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Alert request retransmit count */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_NS7,</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Reset repeat count */</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_NS11,</span><br><span style="color: hsl(120, 100%, 40%);">+ _NUM_SGS_STATE_COUNTERS</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+extern const struct value_string sgs_state_timer_names[];</span><br><span style="color: hsl(120, 100%, 40%);">+static inline const char *vlr_sgs_state_timer_name(enum vlr_sgs_state_tmr Ts)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ return get_value_string(sgs_state_timer_names, Ts);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+extern const struct value_string sgs_state_counter_names[];</span><br><span style="color: hsl(120, 100%, 40%);">+static inline const char *vlr_sgs_state_counter_name(enum vlr_sgs_state_ctr Ns)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ return get_value_string(sgs_state_timer_names, Ns);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* This callback function is called when an SGs location update is complete */</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_lu_response {</span><br><span style="color: hsl(120, 100%, 40%);">+ bool accepted;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+typedef void (*vlr_sgs_lu_response_cb_t) (struct sgs_lu_response *response);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* This callback function is called in cases where a paging request is required</span><br><span style="color: hsl(120, 100%, 40%);">+ * after the LU is completed */</span><br><span style="color: hsl(120, 100%, 40%);">+typedef int (*vlr_sgs_lu_paging_cb_t) (struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* This callback function is called to send the MM info to the UE. */</span><br><span style="color: hsl(120, 100%, 40%);">+typedef void (*vlr_sgs_lu_mminfo_cb_t) (struct vlr_subscr *vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Configuration parameters for the SGs FSM */</span><br><span style="color: hsl(120, 100%, 40%);">+struct vlr_sgs_cfg {</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int timer[_NUM_SGS_STATE_TIMERS];</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int counter[_NUM_SGS_STATE_COUNTERS];</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_reset(struct vlr_instance *vlr);</span><br><span style="color: hsl(120, 100%, 40%);">+int vlr_sgs_loc_update(struct vlr_instance *vlr, struct vlr_sgs_cfg *cfg,</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_lu_response_cb_t response_cb, vlr_sgs_lu_paging_cb_t paging_cb,</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_lu_mminfo_cb_t mminfo_cb, char *mme_name, enum vlr_lu_type type, const char *imsi,</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_location_area_id *new_lai);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_loc_update_acc_sent(struct vlr_subscr *vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_loc_update_rej_sent(struct vlr_subscr *vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_detach(struct vlr_instance *vlr, const char *imsi, bool eps);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_imsi_detach(struct vlr_instance *vlr, const char *imsi, enum sgsap_imsi_det_noneps_type type);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_eps_detach(struct vlr_instance *vlr, const char *imsi, enum sgsap_imsi_det_eps_type type);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_tmsi_reall_compl(struct vlr_instance *vlr, const char *imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_pag_rej(struct vlr_instance *vlr, const char *imsi, enum sgsap_sgs_cause cause);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_pag_ack(struct vlr_instance *vlr, const char *imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_ue_unr(struct vlr_instance *vlr, const char *imsi, enum sgsap_sgs_cause cause);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_pag(struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind);</span><br><span style="color: hsl(120, 100%, 40%);">+bool vlr_sgs_pag_pend(struct vlr_subscr *vsub);</span><br><span>diff --git a/include/osmocom/msc/vty.h b/include/osmocom/msc/vty.h</span><br><span>index 6a55df7..2a3b18b 100644</span><br><span>--- a/include/osmocom/msc/vty.h</span><br><span>+++ b/include/osmocom/msc/vty.h</span><br><span>@@ -23,6 +23,7 @@</span><br><span> SMPP_NODE,</span><br><span> SMPP_ESME_NODE,</span><br><span> HLR_NODE,</span><br><span style="color: hsl(120, 100%, 40%);">+ CFG_SGS_NODE,</span><br><span> };</span><br><span> </span><br><span> int bsc_vty_init_extra(void);</span><br><span>diff --git a/src/libmsc/Makefile.am b/src/libmsc/Makefile.am</span><br><span>index 72da747..454b970 100644</span><br><span>--- a/src/libmsc/Makefile.am</span><br><span>+++ b/src/libmsc/Makefile.am</span><br><span>@@ -17,6 +17,7 @@</span><br><span> $(LIBOSMOMGCPCLIENT_CFLAGS) \</span><br><span> $(LIBOSMOGSUPCLIENT_CFLAGS) \</span><br><span> $(LIBOSMORANAP_CFLAGS) \</span><br><span style="color: hsl(120, 100%, 40%);">+ $(LIBOSMONETIF_CFLAGS) \</span><br><span> $(NULL)</span><br><span> </span><br><span> noinst_HEADERS = \</span><br><span>@@ -52,6 +53,9 @@</span><br><span> transaction.c \</span><br><span> osmo_msc.c \</span><br><span> ctrl_commands.c \</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_iface.c \</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_server.c \</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_vty.c \</span><br><span> $(NULL)</span><br><span> if BUILD_IU</span><br><span> libmsc_a_SOURCES += \</span><br><span>diff --git a/src/libmsc/gsm_04_08.c b/src/libmsc/gsm_04_08.c</span><br><span>index adc946e..c6e5528 100644</span><br><span>--- a/src/libmsc/gsm_04_08.c</span><br><span>+++ b/src/libmsc/gsm_04_08.c</span><br><span>@@ -469,13 +469,12 @@</span><br><span> return ret;</span><br><span> }</span><br><span> </span><br><span style="color: hsl(0, 100%, 40%);">-</span><br><span style="color: hsl(0, 100%, 40%);">-/* Section 9.2.15a */</span><br><span style="color: hsl(0, 100%, 40%);">-int gsm48_tx_mm_info(struct ran_conn *conn)</span><br><span style="color: hsl(120, 100%, 40%);">+/* Generate a message buffer that contains a valid MM info message,</span><br><span style="color: hsl(120, 100%, 40%);">+ * See also 3GPP TS 24.008, chapter 9.2.15a */</span><br><span style="color: hsl(120, 100%, 40%);">+struct msgb *gsm48_create_mm_info(struct gsm_network *net)</span><br><span> {</span><br><span> struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 MM INF");</span><br><span> struct gsm48_hdr *gh;</span><br><span style="color: hsl(0, 100%, 40%);">- struct gsm_network *net = conn->network;</span><br><span> uint8_t *ptr8;</span><br><span> int name_len, name_pad;</span><br><span> </span><br><span>@@ -617,8 +616,18 @@</span><br><span> ptr8[2] = dst;</span><br><span> }</span><br><span> </span><br><span style="color: hsl(0, 100%, 40%);">- LOG_RAN_CONN(conn, LOGL_DEBUG, "Tx MM INFO\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ return msg;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+/* Section 9.2.15a */</span><br><span style="color: hsl(120, 100%, 40%);">+int gsm48_tx_mm_info(struct ran_conn *conn)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm_network *net = conn->network;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *msg;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ msg = gsm48_create_mm_info(net);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOG_RAN_CONN(conn, LOGL_DEBUG, "Tx MM INFO\n");</span><br><span> return gsm48_conn_sendmsg(msg, conn, NULL);</span><br><span> }</span><br><span> </span><br><span>diff --git a/src/libmsc/gsm_04_08_cc.c b/src/libmsc/gsm_04_08_cc.c</span><br><span>index 0119e7b..93e136c 100644</span><br><span>--- a/src/libmsc/gsm_04_08_cc.c</span><br><span>+++ b/src/libmsc/gsm_04_08_cc.c</span><br><span>@@ -1969,7 +1969,8 @@</span><br><span> vsub,</span><br><span> setup_trig_pag_evt,</span><br><span> trans,</span><br><span style="color: hsl(0, 100%, 40%);">- "MNCC: establish call");</span><br><span style="color: hsl(120, 100%, 40%);">+ "MNCC: establish call",</span><br><span style="color: hsl(120, 100%, 40%);">+ SGSAP_SERV_IND_CS_CALL);</span><br><span> if (!trans->paging_request) {</span><br><span> LOGP(DCC, LOGL_ERROR, "Failed to allocate paging token.\n");</span><br><span> vlr_subscr_put(vsub);</span><br><span>diff --git a/src/libmsc/gsm_04_11.c b/src/libmsc/gsm_04_11.c</span><br><span>index 1edf2d4..e63d1b6 100644</span><br><span>--- a/src/libmsc/gsm_04_11.c</span><br><span>+++ b/src/libmsc/gsm_04_11.c</span><br><span>@@ -193,7 +193,9 @@</span><br><span> LOGP(DLSMS, LOGL_DEBUG, "Initiating Paging procedure "</span><br><span> "for %s due to MMSMS_EST_REQ\n", vlr_subscr_name(trans->vsub));</span><br><span> trans->paging_request = subscr_request_conn(trans->vsub,</span><br><span style="color: hsl(0, 100%, 40%);">- paging_cb_mmsms_est_req, trans, "MT SMS");</span><br><span style="color: hsl(120, 100%, 40%);">+ paging_cb_mmsms_est_req,</span><br><span style="color: hsl(120, 100%, 40%);">+ trans, "MT SMS",</span><br><span style="color: hsl(120, 100%, 40%);">+ SGSAP_SERV_IND_SMS);</span><br><span> if (!trans->paging_request) {</span><br><span> LOGP(DLSMS, LOGL_ERROR, "Failed to initiate Paging "</span><br><span> "procedure for %s\n", vlr_subscr_name(trans->vsub));</span><br><span>diff --git a/src/libmsc/gsm_09_11.c b/src/libmsc/gsm_09_11.c</span><br><span>index 608d4ff..dca315d 100644</span><br><span>--- a/src/libmsc/gsm_09_11.c</span><br><span>+++ b/src/libmsc/gsm_09_11.c</span><br><span>@@ -343,7 +343,8 @@</span><br><span> </span><br><span> /* Trigger Paging Request */</span><br><span> trans->paging_request = subscr_request_conn(vsub,</span><br><span style="color: hsl(0, 100%, 40%);">- &handle_paging_event, trans, "GSM 09.11 SS/USSD");</span><br><span style="color: hsl(120, 100%, 40%);">+ &handle_paging_event, trans, "GSM 09.11 SS/USSD",</span><br><span style="color: hsl(120, 100%, 40%);">+ SGSAP_SERV_IND_CS_CALL);</span><br><span> if (!trans->paging_request) {</span><br><span> LOGP(DMM, LOGL_ERROR, "Failed to allocate paging token\n");</span><br><span> trans_free(trans);</span><br><span>diff --git a/src/libmsc/gsm_subscriber.c b/src/libmsc/gsm_subscriber.c</span><br><span>index 9ca5e2b..e60344f 100644</span><br><span>--- a/src/libmsc/gsm_subscriber.c</span><br><span>+++ b/src/libmsc/gsm_subscriber.c</span><br><span>@@ -48,6 +48,7 @@</span><br><span> #include <osmocom/msc/vlr.h></span><br><span> #include <osmocom/msc/msc_ifaces.h></span><br><span> #include <osmocom/msc/a_iface.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_iface.h></span><br><span> </span><br><span> void subscr_paging_cancel(struct vlr_subscr *vsub, enum gsm_paging_event event)</span><br><span> {</span><br><span>@@ -109,7 +110,9 @@</span><br><span> return 0;</span><br><span> }</span><br><span> </span><br><span style="color: hsl(0, 100%, 40%);">-static int msc_paging_request(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+/* Execute a paging on the currently active RAN. Returns the number of</span><br><span style="color: hsl(120, 100%, 40%);">+ * delivered paging requests or -EINVAL in case of failure. */</span><br><span style="color: hsl(120, 100%, 40%);">+static int msc_paging_request(struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind)</span><br><span> {</span><br><span> /* The subscriber was last seen in subscr->lac. Find out which</span><br><span> * BSCs/RNCs are responsible and send them a paging request via open</span><br><span>@@ -122,6 +125,8 @@</span><br><span> vsub->tmsi == GSM_RESERVED_TMSI?</span><br><span> NULL : &vsub->tmsi,</span><br><span> vsub->cgi.lai.lac);</span><br><span style="color: hsl(120, 100%, 40%);">+ case OSMO_RAT_EUTRAN_SGS:</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_iface_tx_paging(vsub, serv_ind);</span><br><span> default:</span><br><span> break;</span><br><span> }</span><br><span>@@ -142,10 +147,11 @@</span><br><span> * \param cbfn function to call when the conn is established.</span><br><span> * \param param caller defined param to pass to cbfn().</span><br><span> * \param label human readable label of the request kind used for logging.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param serv_ind sgsap service indicator (in case SGs interface is used to page).</span><br><span> */</span><br><span> struct subscr_request *subscr_request_conn(struct vlr_subscr *vsub,</span><br><span> gsm_cbfn *cbfn, void *param,</span><br><span style="color: hsl(0, 100%, 40%);">- const char *label)</span><br><span style="color: hsl(120, 100%, 40%);">+ const char *label, enum sgsap_service_ind serv_ind)</span><br><span> {</span><br><span> int rc;</span><br><span> struct subscr_request *request;</span><br><span>@@ -155,7 +161,7 @@</span><br><span> if (!vsub->cs.is_paging) {</span><br><span> LOGP(DMM, LOGL_DEBUG, "Subscriber %s not paged yet, start paging.\n",</span><br><span> vlr_subscr_name(vsub));</span><br><span style="color: hsl(0, 100%, 40%);">- rc = msc_paging_request(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = msc_paging_request(vsub, serv_ind);</span><br><span> if (rc <= 0) {</span><br><span> LOGP(DMM, LOGL_ERROR, "Subscriber %s paging failed: %d\n",</span><br><span> vlr_subscr_name(vsub), rc);</span><br><span>diff --git a/src/libmsc/msc_ifaces.c b/src/libmsc/msc_ifaces.c</span><br><span>index 3074d07..e2c52df 100644</span><br><span>--- a/src/libmsc/msc_ifaces.c</span><br><span>+++ b/src/libmsc/msc_ifaces.c</span><br><span>@@ -28,6 +28,7 @@</span><br><span> #include <osmocom/mgcp_client/mgcp_client.h></span><br><span> #include <osmocom/msc/vlr.h></span><br><span> #include <osmocom/msc/a_iface.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_iface.h></span><br><span> #include <osmocom/msc/gsm_04_08.h></span><br><span> #include <osmocom/msc/msc_mgcp.h></span><br><span> </span><br><span>@@ -60,6 +61,10 @@</span><br><span> msg->dst = conn->iu.ue_ctx;</span><br><span> return ranap_iu_tx(msg, 0);</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ case OSMO_RAT_EUTRAN_SGS:</span><br><span style="color: hsl(120, 100%, 40%);">+ msg->dst = conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_iface_tx_dtap_ud(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> default:</span><br><span> LOGP(DMSC, LOGL_ERROR,</span><br><span> "msc_tx(): conn->via_ran invalid (%d)\n",</span><br><span>diff --git a/src/libmsc/msc_vty.c b/src/libmsc/msc_vty.c</span><br><span>index 93d093f..e1019a2 100644</span><br><span>--- a/src/libmsc/msc_vty.c</span><br><span>+++ b/src/libmsc/msc_vty.c</span><br><span>@@ -56,6 +56,8 @@</span><br><span> #include <osmocom/msc/signal.h></span><br><span> #include <osmocom/msc/mncc_int.h></span><br><span> #include <osmocom/msc/rrlp.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr_sgs.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_vty.h></span><br><span> </span><br><span> static struct gsm_network *gsmnet = NULL;</span><br><span> </span><br><span>@@ -565,7 +567,7 @@</span><br><span> {</span><br><span> vty_out(vty, "%08x %3s %5u %3u %08x %c /%1u %27s %22s%s",</span><br><span> conn->a.conn_id,</span><br><span style="color: hsl(0, 100%, 40%);">- conn->via_ran == OSMO_RAT_UTRAN_IU ? "Iu" : "A",</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_rat_type_name(conn->via_ran),</span><br><span> conn->lac,</span><br><span> conn->use_count,</span><br><span> conn->use_tokens,</span><br><span>@@ -729,6 +731,15 @@</span><br><span> reqs += 1;</span><br><span> vty_out(vty, " Paging: %s paging for %d requests%s",</span><br><span> vsub->cs.is_paging ? "is" : "not", reqs, VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* SGs related */</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " SGs-state: %s%s",</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_name(vsub->sgs_fsm), VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->sgs.mme_name && strlen(vsub->sgs.mme_name))</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " SGs-MME: %s%s", vsub->sgs.mme_name, VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ else</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " SGs-MME: (none)%s", VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> vty_out(vty, " Use count: %u%s", vsub->use_count, VTY_NEWLINE);</span><br><span> </span><br><span> /* Connection */</span><br><span>@@ -1159,7 +1170,7 @@</span><br><span> return CMD_WARNING;</span><br><span> }</span><br><span> </span><br><span style="color: hsl(0, 100%, 40%);">- req = subscr_request_conn(vsub, NULL, NULL, "manual Paging from VTY");</span><br><span style="color: hsl(120, 100%, 40%);">+ req = subscr_request_conn(vsub, NULL, NULL, "manual Paging from VTY", SGSAP_SERV_IND_CS_CALL);</span><br><span> if (req)</span><br><span> vty_out(vty, "%% paging subscriber%s", VTY_NEWLINE);</span><br><span> else</span><br><span>@@ -1590,6 +1601,7 @@</span><br><span> #ifdef BUILD_IU</span><br><span> ranap_iu_vty_init(MSC_NODE, &msc_network->iu.rab_assign_addr_enc);</span><br><span> #endif</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_vty_init();</span><br><span> osmo_fsm_vty_add_cmds();</span><br><span> </span><br><span> osmo_signal_register_handler(SS_SCALL, scall_cbfn, NULL);</span><br><span>diff --git a/src/libmsc/ran_conn.c b/src/libmsc/ran_conn.c</span><br><span>index 4eefa6d..6629bf6 100644</span><br><span>--- a/src/libmsc/ran_conn.c</span><br><span>+++ b/src/libmsc/ran_conn.c</span><br><span>@@ -31,6 +31,7 @@</span><br><span> #include <osmocom/msc/transaction.h></span><br><span> #include <osmocom/msc/signal.h></span><br><span> #include <osmocom/msc/a_iface.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_iface.h></span><br><span> #include <osmocom/msc/iucs.h></span><br><span> </span><br><span> #include "../../bscconfig.h"</span><br><span>@@ -338,6 +339,13 @@</span><br><span> {</span><br><span> struct ran_conn *conn = fi->priv;</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ /* The SGs interface needs to access vsub struct members to send the</span><br><span style="color: hsl(120, 100%, 40%);">+ * release message, however the following release procedures will</span><br><span style="color: hsl(120, 100%, 40%);">+ * remove conn->vsub, so we need to send the release right now. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (conn->via_ran == OSMO_RAT_EUTRAN_SGS) {</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_iface_tx_release(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> /* Use count for either conn->a.waiting_for_clear_complete or</span><br><span> * conn->iu.waiting_for_release_complete. 'get' it early, so we don't deallocate after tearing</span><br><span> * down active transactions. Safeguard against double-get (though it shouldn't happen). */</span><br><span>@@ -381,6 +389,12 @@</span><br><span> }</span><br><span> conn->iu.waiting_for_release_complete = true;</span><br><span> break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case OSMO_RAT_EUTRAN_SGS:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Release message is already sent at the beginning of this</span><br><span style="color: hsl(120, 100%, 40%);">+ * functions (see above), but we still need to notify the</span><br><span style="color: hsl(120, 100%, 40%);">+ * conn that a release has been sent / is in progress. */</span><br><span style="color: hsl(120, 100%, 40%);">+ ran_conn_sgs_release_sent(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span> default:</span><br><span> LOGP(DMM, LOGL_ERROR, "%s: Unknown RAN type, cannot tx release/clear\n",</span><br><span> vlr_subscr_name(conn->vsub));</span><br><span>@@ -667,6 +681,8 @@</span><br><span> case OSMO_RAT_UTRAN_IU:</span><br><span> conn->log_subsys = DRANAP;</span><br><span> break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case OSMO_RAT_EUTRAN_SGS:</span><br><span style="color: hsl(120, 100%, 40%);">+ conn->log_subsys = DSGS;</span><br><span> default:</span><br><span> conn->log_subsys = DMSC;</span><br><span> break;</span><br><span>@@ -772,3 +788,11 @@</span><br><span> {</span><br><span> rx_close_complete(conn, "Iu Release Complete", &conn->iu.waiting_for_release_complete);</span><br><span> }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+void ran_conn_sgs_release_sent(struct ran_conn *conn)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ bool dummy_waiting_for_release_complete = true;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: In SGsAP there is no confirmation of a release. */</span><br><span style="color: hsl(120, 100%, 40%);">+ rx_close_complete(conn, "SGs Release Complete", &dummy_waiting_for_release_complete);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span>diff --git a/src/libmsc/sgs_iface.c b/src/libmsc/sgs_iface.c</span><br><span>new file mode 100644</span><br><span>index 0000000..1c2146a</span><br><span>--- /dev/null</span><br><span>+++ b/src/libmsc/sgs_iface.c</span><br><span>@@ -0,0 +1,1265 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGs Interface according to 3GPP TS 23.272 + TS 29.118 */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/utils.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/msgb.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/fsm.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/socket.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/select.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/tlv.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/gsm48.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/gsm23003.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/gsm29118.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/netif/stream.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr_sgs.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/gsm_data.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/a_iface.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/gsm_04_08.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/debug.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_iface.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_server.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/msc_ifaces.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/protocol/gsm_29_118.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/apn.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define S(x) (1 << (x))</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* A pointer to the GSM network we work with. By the current paradigm,</span><br><span style="color: hsl(120, 100%, 40%);">+ * there can only be one gsm_network per MSC. The pointer is set once</span><br><span style="color: hsl(120, 100%, 40%);">+ * when calling a_init() */</span><br><span style="color: hsl(120, 100%, 40%);">+static struct gsm_network *gsm_network = NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static struct osmo_fsm sgs_vlr_reset_fsm;</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_tx(struct sgs_connection *sgc, struct msgb *msg);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_state *g_sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/***********************************************************************</span><br><span style="color: hsl(120, 100%, 40%);">+ * SGs state per MME connection</span><br><span style="color: hsl(120, 100%, 40%);">+ ***********************************************************************/</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define LOGSGC(sgc, lvl, fmt, args...) \</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, lvl, "%s: " fmt, sgc->sockname, ## args)</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define LOGSGC_VSUB(sgc, sub_info, lvl, fmt, args...) \</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, lvl, "(sub %s) %s: " fmt, sub_info, sgc->sockname, ## args)</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define LOGMME(mme, lvl, fmt, args...) \</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, lvl, "%s: " fmt, mme->fqdn ? mme->fqdn : mme->conn->sockname, ## args)</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+enum sgs_vlr_reset_fsm_state {</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_VLRR_ST_NULL,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_VLRR_ST_WAIT_ACK,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_VLRR_ST_COMPLETE,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+enum sgs_vlr_reset_fsm_event {</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_VLRR_E_START_RESET,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_VLRR_E_RX_RESET_ACK,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/***********************************************************************</span><br><span style="color: hsl(120, 100%, 40%);">+ * SGs utility functions</span><br><span style="color: hsl(120, 100%, 40%);">+ ***********************************************************************/</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Allocate a new subscriber connection */</span><br><span style="color: hsl(120, 100%, 40%);">+static struct ran_conn *subscr_conn_allocate_sgs(struct sgs_connection *sgc, struct vlr_subscr *vsub, bool mt)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct ran_conn *conn;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ conn = ran_conn_alloc(gsm_network, OSMO_RAT_EUTRAN_SGS, vsub->sgs.lai.lac);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!conn) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC_VSUB(sgc, vlr_subscr_name(vsub), LOGL_ERROR, "Connection allocation failed\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ conn->vsub = vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ conn->vsub->cs.attached_via_ran = conn->via_ran;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Accept the connection immediately, since the UE is already</span><br><span style="color: hsl(120, 100%, 40%);">+ * authenticated by the MME no authentication is required. */</span><br><span style="color: hsl(120, 100%, 40%);">+ conn->complete_layer3_type = mt ? COMPLETE_LAYER3_PAGING_RESP : COMPLETE_LAYER3_CM_SERVICE_REQ;</span><br><span style="color: hsl(120, 100%, 40%);">+ ran_conn_update_id(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(conn->fi, RAN_CONN_E_COMPLETE_LAYER_3, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(conn->fi, RAN_CONN_E_ACCEPTED, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOG_RAN_CONN(conn, LOGL_DEBUG, "RAN connection successfully allocated!\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ return conn;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Check if there are connections associated with a given subscriber. If yes,</span><br><span style="color: hsl(120, 100%, 40%);">+ * make sure that those connections are tossed. */</span><br><span style="color: hsl(120, 100%, 40%);">+static void subscr_conn_toss(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct ran_conn *conn;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ conn = connection_for_subscr(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!conn)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOG_RAN_CONN(conn, LOGL_DEBUG, "RAN connection tossed because of unexpected RAN change!\n");</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ ran_conn_mo_close(conn, GSM48_REJECT_CONGESTION);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_mme_ctx *sgs_mme_by_fqdn(struct sgs_state *sgs, const char *mme_fqdn)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ llist_for_each_entry(mme, &sgs->mme_list, entry) {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!strcasecmp(mme_fqdn, mme->fqdn))</span><br><span style="color: hsl(120, 100%, 40%);">+ return mme;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static struct sgs_mme_ctx *sgs_mme_alloc(struct sgs_state *sgs, const char *mme_fqdn, const struct osmo_gummei *gummei)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(sgs_mme_by_fqdn(sgs, mme_fqdn) == NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = talloc_zero(sgs, struct sgs_mme_ctx);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ mme->sgs = sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_STRLCPY_ARRAY(mme->fqdn, mme_fqdn);</span><br><span style="color: hsl(120, 100%, 40%);">+ mme->fi = osmo_fsm_inst_alloc(&sgs_vlr_reset_fsm, mme, mme, LOGL_INFO, osmo_gummei_name(gummei));</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme->fi) {</span><br><span style="color: hsl(120, 100%, 40%);">+ talloc_free(mme);</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ llist_add_tail(&mme->entry, &sgs->mme_list);</span><br><span style="color: hsl(120, 100%, 40%);">+ return mme;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Decode and verify MME name */</span><br><span style="color: hsl(120, 100%, 40%);">+static int decode_mme_name(char *mme_name, const struct tlv_parsed *tp)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *mme_name_enc = TLVP_VAL_MINLEN(tp, SGSAP_IE_MME_NAME, SGS_MME_NAME_LEN);</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_gummei gummei;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme_name_enc)</span><br><span style="color: hsl(120, 100%, 40%);">+ return -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* decode the MME name from DNS labels to string */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_apn_to_str(mme_name, TLVP_VAL(tp, SGSAP_IE_MME_NAME), TLVP_LEN(tp, SGSAP_IE_MME_NAME));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* try to parse the MME name into a GUMMEI as a test for the format */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (osmo_parse_mme_domain(&gummei, mme_name) < 0)</span><br><span style="color: hsl(120, 100%, 40%);">+ return -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* A MME FQDN was received (e.g. RESET-IND/RESET-ACK/LU-REQ) */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_mme_fqdn_received(struct sgs_connection *sgc, const char *mme_fqdn)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_gummei gummei;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* caller must pass in a valid FQDN string syntax */</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(osmo_parse_mme_domain(&gummei, mme_fqdn) == 0);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!sgc->mme) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* attempt to find MME with given name */</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_by_fqdn(sgc->sgs, mme_fqdn);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_alloc(sgc->sgs, mme_fqdn, &gummei);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(mme);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (mme->conn) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* The MME context has another connection !?! */</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR, "Rx MME name %s, but that MME already has other "</span><br><span style="color: hsl(120, 100%, 40%);">+ "SCTP connection?!?\n", mme_fqdn);</span><br><span style="color: hsl(120, 100%, 40%);">+ return -1;</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* associate the two */</span><br><span style="color: hsl(120, 100%, 40%);">+ mme->conn = sgc;</span><br><span style="color: hsl(120, 100%, 40%);">+ sgc->mme = mme;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgc->mme;</span><br><span style="color: hsl(120, 100%, 40%);">+ if (strcasecmp(mme->fqdn, mme_fqdn) != 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGMME(mme, LOGL_ERROR, "Rx MME name \"%s\" in packet from MME \"%s\" ?!?\n", mme_fqdn,</span><br><span style="color: hsl(120, 100%, 40%);">+ mme->fqdn);</span><br><span style="color: hsl(120, 100%, 40%);">+ return -2;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Safely get the mme-name for an sgs-connection */</span><br><span style="color: hsl(120, 100%, 40%);">+static char *sgs_mme_fqdn_get(struct sgs_connection *sgc)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!sgc)</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!sgc->mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgc->mme->fqdn[0] == '\0')</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgc->mme->fqdn;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Find an sgs_mme_ctx for a given vlr subscriber, also check result */</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_mme_ctx *sgs_mme_ctx_by_vsub(struct vlr_subscr *vsub, uint8_t msg_type)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Find SGS connection by MME name */</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_by_fqdn(g_sgs, vsub->sgs.mme_name);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR, "(sub %s) Tx %s cannot find suitable MME!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_name(vsub), sgsap_msg_type_name(msg_type));</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme->conn) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR,</span><br><span style="color: hsl(120, 100%, 40%);">+ "(sub %s) Tx %s suitable MME found, but no SGS connection present!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_name(vsub), sgsap_msg_type_name(msg_type));</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme->sgs) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR,</span><br><span style="color: hsl(120, 100%, 40%);">+ "(sub %s) Tx %s suitable MME found, but no SGS state present!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_name(vsub), sgsap_msg_type_name(msg_type));</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return mme;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Make sure that the subscriber is known and that the subscriber is in the</span><br><span style="color: hsl(120, 100%, 40%);">+ * SGs associated state. In case of failure the function returns false and</span><br><span style="color: hsl(120, 100%, 40%);">+ * automatically sends a release message to the MME */</span><br><span style="color: hsl(120, 100%, 40%);">+static bool check_sgs_association(struct sgs_connection *sgc, struct msgb *msg, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+ uint8_t msg_type = msg->data[0];</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Subscriber must be known by the VLR */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_NOTICE, "SGsAP Message %s with unknown IMSI (%s), releasing\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg_type), imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_release_req(imsi, SGSAP_SGS_CAUSE_IMSI_UNKNOWN);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ return false;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* The SGs FSM must also be in SGs associated state */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->sgs_fsm->state != SGS_UE_ST_ASSOCIATED) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_NOTICE, "(sub %s) SGsAP Message %s subscriber not SGs-associated, releasing\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_name(vsub), sgsap_msg_type_name(msg_type));</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_release_req(vsub->imsi, SGSAP_SGS_CAUSE_IMSI_DET_EPS_NONEPS);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return false;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return true;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/***********************************************************************</span><br><span style="color: hsl(120, 100%, 40%);">+ * SGsAP transmit functions</span><br><span style="color: hsl(120, 100%, 40%);">+ ***********************************************************************/</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Send message out to remote end (final step) */</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_tx(struct sgs_connection *sgc, struct msgb *msg)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!msg) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_NOTICE, "Null message, cannot transmit!\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_sctp_ppid(msg) = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!sgc) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_NOTICE, "Cannot transmit %s: connection dead. Discarding\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]));</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_send(sgc->srv, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Get some subscriber info from ISMI (for the log text) */</span><br><span style="color: hsl(120, 100%, 40%);">+const char *subscr_info(const char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ const char *subscr_string = "<unknown>";</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (imsi) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ subscr_string = imsi;</span><br><span style="color: hsl(120, 100%, 40%);">+ else {</span><br><span style="color: hsl(120, 100%, 40%);">+ subscr_string = vlr_subscr_name(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return subscr_string;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Comfortable status message generator that also generates some basic</span><br><span style="color: hsl(120, 100%, 40%);">+ * context-dependent dependand log output */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_tx_status(struct sgs_connection *sgc, const char *imsi, enum sgsap_sgs_cause cause, struct msgb *msg,</span><br><span style="color: hsl(120, 100%, 40%);">+ int sgsap_iei)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgsap_iei < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC_VSUB(sgc, subscr_info(imsi), LOGL_ERROR, "Rx %s failed with cause %s!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]), sgsap_sgs_cause_name(cause));</span><br><span style="color: hsl(120, 100%, 40%);">+ } else if (cause == SGSAP_SGS_CAUSE_MISSING_MAND_IE) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC_VSUB(sgc, subscr_info(imsi), LOGL_ERROR, "Rx %s with missing mandatory %s IEI!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]), sgsap_iei_name(sgsap_iei));</span><br><span style="color: hsl(120, 100%, 40%);">+ } else if (cause == SGSAP_SGS_CAUSE_INVALID_MAND_IE) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC_VSUB(sgc, subscr_info(imsi), LOGL_ERROR, "Rx %s with invalid mandatory %s IEI!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]), sgsap_iei_name(sgsap_iei));</span><br><span style="color: hsl(120, 100%, 40%);">+ } else if (cause == SGSAP_SGS_CAUSE_COND_IE_ERROR) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC_VSUB(sgc, subscr_info(imsi), LOGL_ERROR, "Rx %s with errornous conditional %s IEI!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]), sgsap_iei_name(sgsap_iei));</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC_VSUB(sgc, subscr_info(imsi), LOGL_ERROR, "Rx %s failed with cause %s at %s IEI!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]), sgsap_sgs_cause_name(cause), sgsap_iei_name(sgsap_iei));</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_status(imsi, cause, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Called by VLR via callback, transmits the the location update response or</span><br><span style="color: hsl(120, 100%, 40%);">+ * reject, depending on the outcome of the location update. */</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_tx_loc_upd_resp_cb(struct sgs_lu_response *response)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = response->vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+ uint8_t new_id[2 + GSM48_TMSI_LEN];</span><br><span style="color: hsl(120, 100%, 40%);">+ uint8_t *new_id_ptr = new_id;</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int new_id_len = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ uint8_t resp_msg_type;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (response->accepted)</span><br><span style="color: hsl(120, 100%, 40%);">+ resp_msg_type = SGSAP_MSGT_LOC_UPD_ACK;</span><br><span style="color: hsl(120, 100%, 40%);">+ else</span><br><span style="color: hsl(120, 100%, 40%);">+ resp_msg_type = SGSAP_MSGT_LOC_UPD_REJ;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_ctx_by_vsub(vsub, resp_msg_type);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (response->accepted) {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->tmsi_new != GSM_RESERVED_TMSI) {</span><br><span style="color: hsl(120, 100%, 40%);">+ new_id_len = gsm48_generate_mid_from_tmsi(new_id, vsub->tmsi_new);</span><br><span style="color: hsl(120, 100%, 40%);">+ new_id_ptr = new_id + 2;</span><br><span style="color: hsl(120, 100%, 40%);">+ new_id_len -= 2;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_lu_ack(vsub->imsi, &vsub->sgs.lai, new_id_ptr, new_id_len);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(mme->conn, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_loc_update_acc_sent(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_lu_rej(vsub->imsi, SGSAP_SGS_CAUSE_IMSI_UNKNOWN, &vsub->sgs.lai);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(mme->conn, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_loc_update_rej_sent(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Called by VLR via callback, transmits MM information to the UE */</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_tx_mm_info_cb(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *msg;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *msg_mm_info;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* The sending of MM information requests is an optional feature and</span><br><span style="color: hsl(120, 100%, 40%);">+ * depends on the network configuration (VTY) */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!gsm_network->send_mm_info)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_ctx_by_vsub(vsub, SGSAP_MSGT_MM_INFO_REQ);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Create and send MM information request message, see also:</span><br><span style="color: hsl(120, 100%, 40%);">+ * 3GPP TS 29.118, chapter 8.12 SGsAP-MM-INFORMATION-REQUEST and</span><br><span style="color: hsl(120, 100%, 40%);">+ * 3GPP TS 29.018, chapter 18.4.16 MM information. */</span><br><span style="color: hsl(120, 100%, 40%);">+ msg_mm_info = gsm48_create_mm_info(gsm_network);</span><br><span style="color: hsl(120, 100%, 40%);">+ msg = gsm29118_create_mm_info_req(vsub->imsi, msg_mm_info->data + 2, msg_mm_info->len - 2);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(mme->conn, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg_mm_info);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Page UE through SGs interface</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub subscriber context</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] serv_ind service indicator (sms or voide)</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns 0 in case of success, -EINVAL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_iface_tx_paging(struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm29118_paging_req paging_params;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* See also: 3GPP TS 29.118, chapter 5.1.2.2 Paging Initiation */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->sgs_fsm->state == SGS_UE_ST_NULL && vsub->conf_by_radio_contact_ind == true)</span><br><span style="color: hsl(120, 100%, 40%);">+ return -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_ctx_by_vsub(vsub, SGSAP_MSGT_PAGING_REQ);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ return -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Check if there is still a paging in progress for this subscriber,</span><br><span style="color: hsl(120, 100%, 40%);">+ * if yes, don't initiate another paging request. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vlr_sgs_pag_pend(vsub))</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ memset(&paging_params, 0, sizeof(paging_params));</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(paging_params.imsi, vsub->imsi, sizeof(paging_params.imsi));</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(paging_params.vlr_name, mme->sgs->cfg.vlr_name, sizeof(paging_params.vlr_name));</span><br><span style="color: hsl(120, 100%, 40%);">+ paging_params.serv_ind = serv_ind;</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->conf_by_radio_contact_ind == true) {</span><br><span style="color: hsl(120, 100%, 40%);">+ memcpy(&paging_params.lai, &vsub->sgs.lai, sizeof(paging_params.lai));</span><br><span style="color: hsl(120, 100%, 40%);">+ paging_params.lai_present = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_paging_req(&paging_params);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(mme->conn, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: If we are in SGS_UE_ST_NULL while sub->conf_by_radio_contact_ind == false,</span><br><span style="color: hsl(120, 100%, 40%);">+ * we are supposed to start a search procedure as defined in 3GPP TS 23.018 */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Inform the VLR that a paging via SGs is in progress */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_pag(vsub, serv_ind);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Return a page count of 1 (success) */</span><br><span style="color: hsl(120, 100%, 40%);">+ return 1;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/***********************************************************************</span><br><span style="color: hsl(120, 100%, 40%);">+ * SGs incoming messages from the MME</span><br><span style="color: hsl(120, 100%, 40%);">+ ***********************************************************************/</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Safely read out the SGs cause code from a given message/tlv set, send status</span><br><span style="color: hsl(120, 100%, 40%);">+ * message in case the cause code is invalid or missing. */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_cause_from_msg(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp,</span><br><span style="color: hsl(120, 100%, 40%);">+ const char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_sgs_cause cause;</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *cause_ptr;</span><br><span style="color: hsl(120, 100%, 40%);">+ cause_ptr = TLVP_VAL_MINLEN(tp, SGSAP_IE_SGS_CAUSE, 1);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!cause_ptr) {</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MISSING_MAND_IE, msg, SGSAP_IE_SGS_CAUSE);</span><br><span style="color: hsl(120, 100%, 40%);">+ return -1;</span><br><span style="color: hsl(120, 100%, 40%);">+ } else</span><br><span style="color: hsl(120, 100%, 40%);">+ cause = *cause_ptr;</span><br><span style="color: hsl(120, 100%, 40%);">+ return cause;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-STATUS 3GPP TS 29.118, chapter 8.18 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_status(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, const char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ int cause;</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *err_msg;</span><br><span style="color: hsl(120, 100%, 40%);">+ const char *imsi_ptr;</span><br><span style="color: hsl(120, 100%, 40%);">+ char *err_msg_hex = "(none)";</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ cause = sgs_cause_from_msg(sgc, msg, tp, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (cause < 0)</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (imsi[0] != '\0')</span><br><span style="color: hsl(120, 100%, 40%);">+ imsi_ptr = imsi;</span><br><span style="color: hsl(120, 100%, 40%);">+ else</span><br><span style="color: hsl(120, 100%, 40%);">+ imsi_ptr = "<none>";</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (TLVP_PRESENT(tp, SGSAP_IE_ERR_MSG))</span><br><span style="color: hsl(120, 100%, 40%);">+ err_msg = TLVP_VAL(tp, SGSAP_IE_ERR_MSG);</span><br><span style="color: hsl(120, 100%, 40%);">+ else</span><br><span style="color: hsl(120, 100%, 40%);">+ err_msg = NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (err_msg)</span><br><span style="color: hsl(120, 100%, 40%);">+ err_msg_hex = osmo_hexdump(err_msg, TLVP_LEN(tp, SGSAP_IE_ERR_MSG));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_NOTICE, "Rx STATUS cause=%s, IMSI=%s, err_msg=%s\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_sgs_cause_name(cause), imsi_ptr, err_msg_hex);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-RESET-INDICATION 3GPP TS 29.118, chapter 8.16 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_reset_ind(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm29118_reset_msg reset_params;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ memset(&reset_params, 0, sizeof(reset_params));</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(reset_params.vlr_name, sgc->sgs->cfg.vlr_name, sizeof(reset_params.vlr_name));</span><br><span style="color: hsl(120, 100%, 40%);">+ reset_params.vlr_name_present = true;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_reset_ack(&reset_params);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Perform a reset of the SGS FSM of all subscribers that are present in the VLR */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_reset(gsm_network->vlr);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-RESET-ACK 3GPP TS 29.118, chapter 8.15 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_reset_ack(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ /* dispatch event to VLR reset FSM for this MME */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgc->mme && sgc->mme->fi)</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(sgc->mme->fi, SGS_VLRR_E_RX_RESET_ACK, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-LOCATION-UPDATE-REQUEST 3GPP TS 29.118, chapter 8.11 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_loc_upd_req(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *lu_type_ie;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum vlr_lu_type type;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_location_area_id new_lai;</span><br><span style="color: hsl(120, 100%, 40%);">+ const struct gsm48_loc_area_id *gsm48_lai;</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc;</span><br><span style="color: hsl(120, 100%, 40%);">+ char *mme_name;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_sgs_cfg vlr_sgs_cfg;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Check for lingering connections */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub) {</span><br><span style="color: hsl(120, 100%, 40%);">+ subscr_conn_toss(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Determine MME-Name */</span><br><span style="color: hsl(120, 100%, 40%);">+ mme_name = sgs_mme_fqdn_get(sgc);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme_name) {</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_lu_rej(imsi, SGSAP_SGS_CAUSE_IMSI_UNKNOWN, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Parse LU-Type */</span><br><span style="color: hsl(120, 100%, 40%);">+ lu_type_ie = TLVP_VAL_MINLEN(tp, SGSAP_IE_EPS_LU_TYPE, 1);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!lu_type_ie)</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MISSING_MAND_IE, msg, SGSAP_IE_EPS_LU_TYPE);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (lu_type_ie[0] == 0x01)</span><br><span style="color: hsl(120, 100%, 40%);">+ type = VLR_LU_TYPE_IMSI_ATTACH;</span><br><span style="color: hsl(120, 100%, 40%);">+ else</span><br><span style="color: hsl(120, 100%, 40%);">+ type = VLR_LU_TYPE_REGULAR;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Parse LAI of the new location */</span><br><span style="color: hsl(120, 100%, 40%);">+ gsm48_lai = (struct gsm48_loc_area_id *)TLVP_VAL_MINLEN(tp, SGSAP_IE_LAI, 5);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!gsm48_lai)</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MISSING_MAND_IE, msg, SGSAP_IE_LAI);</span><br><span style="color: hsl(120, 100%, 40%);">+ gsm48_decode_lai2(gsm48_lai, &new_lai);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Perform actual location update */</span><br><span style="color: hsl(120, 100%, 40%);">+ memcpy(vlr_sgs_cfg.timer, sgc->sgs->cfg.timer, sizeof(vlr_sgs_cfg.timer));</span><br><span style="color: hsl(120, 100%, 40%);">+ memcpy(vlr_sgs_cfg.counter, sgc->sgs->cfg.counter, sizeof(vlr_sgs_cfg.counter));</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = vlr_sgs_loc_update(gsm_network->vlr, &vlr_sgs_cfg, sgs_tx_loc_upd_resp_cb, sgs_iface_tx_paging,</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx_mm_info_cb, mme_name, type, imsi, &new_lai);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc != 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_lu_rej(imsi, SGSAP_SGS_CAUSE_IMSI_UNKNOWN, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-IMSI-DETACH-INDICATION 3GPP TS 29.118, chapter 8.8 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_imsi_det_ind(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_imsi_det_noneps_type type;</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *type_ie;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ type_ie = TLVP_VAL_MINLEN(tp, SGSAP_IE_IMSI_DET_NONEPS_TYPE, 1);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!type_ie)</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MISSING_MAND_IE, msg, SGSAP_IE_IMSI_DET_NONEPS_TYPE);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (type_ie[0]) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_NONEPS_T_EXPLICIT_UE_NONEPS:</span><br><span style="color: hsl(120, 100%, 40%);">+ type = SGSAP_ID_NONEPS_T_EXPLICIT_UE_NONEPS;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_NONEPS_T_COMBINED_UE_EPS_NONEPS:</span><br><span style="color: hsl(120, 100%, 40%);">+ type = SGSAP_ID_NONEPS_T_COMBINED_UE_EPS_NONEPS;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_NONEPS_T_IMPLICIT_UE_EPS_NONEPS:</span><br><span style="color: hsl(120, 100%, 40%);">+ type = SGSAP_ID_NONEPS_T_IMPLICIT_UE_EPS_NONEPS;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_INVALID_MAND_IE, msg, SGSAP_IE_IMSI_DET_NONEPS_TYPE);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_imsi_detach(gsm_network->vlr, imsi, type);</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_imsi_det_ack(imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-EPS-DETACH-INDICATION 3GPP TS 29.118, chapter 8.6 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_eps_det_ind(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_imsi_det_eps_type type;</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *type_ie;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ type_ie = TLVP_VAL_MINLEN(tp, SGSAP_IE_IMSI_DET_EPS_TYPE, 1);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!type_ie)</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MISSING_MAND_IE, msg, SGSAP_IE_IMSI_DET_EPS_TYPE);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (type_ie[0]) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_EPS_T_NETWORK_INITIATED:</span><br><span style="color: hsl(120, 100%, 40%);">+ type = SGSAP_ID_EPS_T_NETWORK_INITIATED;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_EPS_T_UE_INITIATED:</span><br><span style="color: hsl(120, 100%, 40%);">+ type = SGSAP_ID_EPS_T_UE_INITIATED;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_EPS_T_EPS_NOT_ALLOWED:</span><br><span style="color: hsl(120, 100%, 40%);">+ type = SGSAP_ID_EPS_T_EPS_NOT_ALLOWED;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_INVALID_MAND_IE, msg, SGSAP_IE_IMSI_DET_EPS_TYPE);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_eps_detach(gsm_network->vlr, imsi, type);</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_eps_det_ack(imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-PAGING-REJECT 3GPP TS 29.118, chapter 8.13 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_pag_rej(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ int cause;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ cause = sgs_cause_from_msg(sgc, msg, tp, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (cause < 0)</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Subscriber must be known by the VLR */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_IMSI_UNKNOWN, msg, SGSAP_IE_IMSI);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Inform the VLR */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_pag_rej(gsm_network->vlr, imsi, cause);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Stop all paging activity */</span><br><span style="color: hsl(120, 100%, 40%);">+ subscr_paging_cancel(vsub, GSM_PAGING_EXPIRED);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Depending on the cause code some action is required */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (cause == SGSAP_SGS_CAUSE_MT_CSFB_REJ_USER) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: We are supposed to trigger a User Determined User Busy (UDUB)</span><br><span style="color: hsl(120, 100%, 40%);">+ * as specified in 3GPP TS 24.082 here, SGs association state shall not</span><br><span style="color: hsl(120, 100%, 40%);">+ * be changed */</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR,</span><br><span style="color: hsl(120, 100%, 40%);">+ "Rx %s with SGSAP_SGS_CAUSE_MT_CSFB_REJ_USER, but sending UDUP is not implemented yet!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]));</span><br><span style="color: hsl(120, 100%, 40%);">+ } else if (cause == SGSAP_SGS_CAUSE_IMSI_DET_EPS) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: In this case we should send the paging via A/Iu interface */</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(false);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-UE-UNREACHABLE 3GPP TS 29.118, chapter 8.21 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_ue_unr(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ int cause;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ cause = sgs_cause_from_msg(sgc, msg, tp, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (cause < 0)</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_ue_unr(gsm_network->vlr, imsi, cause);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-TMSI-REALLOCATION-COMPLETE 3GPP TS 29.118, chapter 8.19 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_tmsi_reall_cmpl(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_tmsi_reall_compl(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-SERVICE-REQUEST 3GPP TS 29.118, chapter 8.17 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_service_req(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_service_ind serv_ind;</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *serv_ind_ie;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct ran_conn *conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: While in other RAN concepts a service request is used to</span><br><span style="color: hsl(120, 100%, 40%);">+ * initiate mobile originated operation, the service request in SGsAP</span><br><span style="color: hsl(120, 100%, 40%);">+ * is comparable to a paging response. The SGsAP SERVICE REQUEST must</span><br><span style="color: hsl(120, 100%, 40%);">+ * not be confused or compared with a CM SERVICE REQUEST! */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!check_sgs_association(sgc, msg, imsi))</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: vsub is already sufficiently verified by check_sgs_association(),</span><br><span style="color: hsl(120, 100%, 40%);">+ * we must have a vsub at this point! */</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* The Service request is intended as a paging response, if one is</span><br><span style="color: hsl(120, 100%, 40%);">+ * received while nothing is paging something is very wrong! */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vlr_sgs_pag_pend(vsub)) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MSG_INCOMP_STATE, msg, -1);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ serv_ind_ie = TLVP_VAL_MINLEN(tp, SGSAP_IE_SERVICE_INDICATOR, 1);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!serv_ind_ie) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MISSING_MAND_IE, msg, SGSAP_IE_SERVICE_INDICATOR);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ if (serv_ind_ie[0] == SGSAP_SERV_IND_CS_CALL)</span><br><span style="color: hsl(120, 100%, 40%);">+ serv_ind = serv_ind_ie[0];</span><br><span style="color: hsl(120, 100%, 40%);">+ else if (serv_ind_ie[0] == SGSAP_SERV_IND_SMS)</span><br><span style="color: hsl(120, 100%, 40%);">+ serv_ind = serv_ind_ie[0];</span><br><span style="color: hsl(120, 100%, 40%);">+ else {</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_INVALID_MAND_IE, msg, SGSAP_IE_SERVICE_INDICATOR);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: The MME shall include an UE EMM Mode IE, but the field is</span><br><span style="color: hsl(120, 100%, 40%);">+ * marked optional. (Why do we need this info at all?) */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Report to the VLR that the paging has successfully completed */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_pag_ack(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Exit early when the service indicator indicates that a call is being</span><br><span style="color: hsl(120, 100%, 40%);">+ * established. In those cases we do not allocate a connection, instead</span><br><span style="color: hsl(120, 100%, 40%);">+ * the connection will be allocated when the MS is appearing on the</span><br><span style="color: hsl(120, 100%, 40%);">+ * A-Interface. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (serv_ind == SGSAP_SERV_IND_CS_CALL) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Allocate subscriber connection */</span><br><span style="color: hsl(120, 100%, 40%);">+ conn = subscr_conn_allocate_sgs(sgc, vsub, true);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!conn) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MSG_INCOMP_STATE, msg, -1);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-UPLINK-UNITDATA 3GPP TS 29.118, chapter 8.22 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_ul_ud(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct dtap_header *dtap;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct ran_conn *conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ bool ran_conn_created = false;</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *nas_msg_container_ie;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!check_sgs_association(sgc, msg, imsi))</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: vsub is already sufficiently verified by check_sgs_association(),</span><br><span style="color: hsl(120, 100%, 40%);">+ * we must have a vsub at this point! */</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Try to find existing connection (MT) or allocate a new one (MO) */</span><br><span style="color: hsl(120, 100%, 40%);">+ conn = connection_for_subscr(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!conn) {</span><br><span style="color: hsl(120, 100%, 40%);">+ conn = subscr_conn_allocate_sgs(sgc, vsub, false);</span><br><span style="color: hsl(120, 100%, 40%);">+ ran_conn_created = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (conn->via_ran != OSMO_RAT_EUTRAN_SGS) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR,</span><br><span style="color: hsl(120, 100%, 40%);">+ "Receiving uplink unit-data for non-sgs connection -- discarding message!\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* If we do not find an existing connection and allocating a new one</span><br><span style="color: hsl(120, 100%, 40%);">+ * faild, give up and return status. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!conn) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MSG_INCOMP_STATE, msg, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ nas_msg_container_ie = TLVP_VAL_MINLEN(tp, SGSAP_IE_NAS_MSG_CONTAINER, 1);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!nas_msg_container_ie) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_MISSING_MAND_IE, msg, SGSAP_IE_NAS_MSG_CONTAINER);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* ran_conn_dtap expects the dtap payload in l3h */</span><br><span style="color: hsl(120, 100%, 40%);">+ dtap = (struct dtap_header *)nas_msg_container_ie;</span><br><span style="color: hsl(120, 100%, 40%);">+ msg->l3h = (uint8_t *) nas_msg_container_ie;</span><br><span style="color: hsl(120, 100%, 40%);">+ OMSC_LINKID_CB(msg) = dtap->link_id;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Forward dtap payload into the msc */</span><br><span style="color: hsl(120, 100%, 40%);">+ ran_conn_dtap(conn, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* If we did not create the conn right here, we just handle the ref</span><br><span style="color: hsl(120, 100%, 40%);">+ * counting normally. Otherwise we are in the same role as</span><br><span style="color: hsl(120, 100%, 40%);">+ * sgs_rx_service_req() and we want that the refcount says incremented</span><br><span style="color: hsl(120, 100%, 40%);">+ * througout the lifetime of the newly created conn. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!ran_conn_created)</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-MO-CSFB-INDICATION, chapter 8.25 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_csfb_ind(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* The MME informs us with this message that the UE has returned back</span><br><span style="color: hsl(120, 100%, 40%);">+ * to the 4G network, so we use the SGs interface again for further</span><br><span style="color: hsl(120, 100%, 40%);">+ * communication with the UE. */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(gsm_network->vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs_tx_status(sgc, imsi, SGSAP_SGS_CAUSE_IMSI_UNKNOWN, msg, SGSAP_IE_IMSI);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Check for lingering connections */</span><br><span style="color: hsl(120, 100%, 40%);">+ subscr_conn_toss(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->cs.attached_via_ran = OSMO_RAT_EUTRAN_SGS;</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* SGsAP-UE-ACTIVITY-INDICATION, chapter 8.20 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_rx_ue_act_ind(struct sgs_connection *sgc, struct msgb *msg, const struct tlv_parsed *tp, char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ /* In this MSC/VLR implementation we do not support the alerting</span><br><span style="color: hsl(120, 100%, 40%);">+ * procedure yet and therefore we will never request any alerting</span><br><span style="color: hsl(120, 100%, 40%);">+ * at the MME. Given that it is unlikely that we ever get activity</span><br><span style="color: hsl(120, 100%, 40%);">+ * indications from the MME, but if we do we should not act all too</span><br><span style="color: hsl(120, 100%, 40%);">+ * hostile and ignore the indication silently. */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR, "Rx %s unexpected, we do not implement alerting yet, ignoring!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg->data[0]));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define TX_STATUS_AND_LOG(sgc, msg_type, cause, fmt) \</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR, fmt, sgsap_msg_type_name(msg_type)); \</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_status(NULL, cause, msg); \</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp); \</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Process incoming SGs message (see sgs_server.c)</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] sgc related sgs connection</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] msg received message</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns 0 in case of success, -EINVAL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_iface_rx(struct sgs_connection *sgc, struct msgb *msg)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *resp;</span><br><span style="color: hsl(120, 100%, 40%);">+ uint8_t msg_type = msg->l2h[0];</span><br><span style="color: hsl(120, 100%, 40%);">+ struct tlv_parsed tp;</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc;</span><br><span style="color: hsl(120, 100%, 40%);">+ char imsi[GSM48_MI_SIZE];</span><br><span style="color: hsl(120, 100%, 40%);">+ char mme_name[SGS_MME_NAME_LEN + 1];</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ memset(imsi, 0, sizeof(imsi));</span><br><span style="color: hsl(120, 100%, 40%);">+ memset(mme_name, 0, sizeof(mme_name));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* When the receiving entity receives a message that is too short to contain a complete</span><br><span style="color: hsl(120, 100%, 40%);">+ * message type information element, the receiving entity shall ignore that message. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (msgb_l2len(msg) < 1)</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Parse TLV elements */</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = tlv_parse(&tp, &sgsap_ie_tlvdef, msgb_l2(msg) + 1, msgb_l2len(msg) - 1, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ TX_STATUS_AND_LOG(sgc, msg_type, SGSAP_SGS_CAUSE_SEMANT_INCORR_MSG, "SGsAP Message %s parsing error\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Most of the messages contain an IMSI as mandatory IE, parse it right here */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!TLVP_PRESENT(&tp, SGSAP_IE_IMSI) &&</span><br><span style="color: hsl(120, 100%, 40%);">+ msg_type != SGSAP_MSGT_STATUS && msg_type != SGSAP_MSGT_RESET_IND && msg_type != SGSAP_MSGT_RESET_ACK) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* reject the message; all but the three above have mandatory IMSI */</span><br><span style="color: hsl(120, 100%, 40%);">+ TX_STATUS_AND_LOG(sgc, msg_type, SGSAP_SGS_CAUSE_MISSING_MAND_IE,</span><br><span style="color: hsl(120, 100%, 40%);">+ "SGsAP Message %s without IMSI, dropping\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (TLVP_PRESENT(&tp, SGSAP_IE_IMSI)) {</span><br><span style="color: hsl(120, 100%, 40%);">+ gsm48_mi_to_string(imsi, sizeof(imsi), TLVP_VAL(&tp, SGSAP_IE_IMSI), TLVP_LEN(&tp, SGSAP_IE_IMSI));</span><br><span style="color: hsl(120, 100%, 40%);">+ if (strlen(imsi) < GSM23003_IMSI_MIN_DIGITS) {</span><br><span style="color: hsl(120, 100%, 40%);">+ TX_STATUS_AND_LOG(sgc, msg_type, SGSAP_SGS_CAUSE_INVALID_MAND_IE,</span><br><span style="color: hsl(120, 100%, 40%);">+ "SGsAP Message %s with short IMSI, dropping\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Some messages contain an MME-NAME as mandatore IE, parse it right here. The</span><br><span style="color: hsl(120, 100%, 40%);">+ * MME-NAME is als immediately registered with the sgc, so it will be implicitly</span><br><span style="color: hsl(120, 100%, 40%);">+ * known to all functions that have access to the sgc context. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!TLVP_PRESENT(&tp, SGSAP_IE_MME_NAME)</span><br><span style="color: hsl(120, 100%, 40%);">+ && (msg_type == SGSAP_MSGT_RESET_IND || msg_type == SGSAP_MSGT_RESET_ACK</span><br><span style="color: hsl(120, 100%, 40%);">+ || msg_type == SGSAP_MSGT_LOC_UPD_REQ || msg_type == SGSAP_MSGT_IMSI_DET_IND</span><br><span style="color: hsl(120, 100%, 40%);">+ || msg_type == SGSAP_MSGT_EPS_DET_IND)) {</span><br><span style="color: hsl(120, 100%, 40%);">+ TX_STATUS_AND_LOG(sgc, msg_type, SGSAP_SGS_CAUSE_MISSING_MAND_IE,</span><br><span style="color: hsl(120, 100%, 40%);">+ "SGsAP Message %s without MME-Name, dropping\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (TLVP_PRESENT(&tp, SGSAP_IE_MME_NAME)) {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (decode_mme_name(mme_name, &tp) != 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ TX_STATUS_AND_LOG(sgc, msg_type, SGSAP_SGS_CAUSE_INVALID_MAND_IE,</span><br><span style="color: hsl(120, 100%, 40%);">+ "SGsAP Message %s with invalid MME-Name, dropping\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Regsister/check mme_name with sgc */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs_mme_fqdn_received(sgc, mme_name) < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ TX_STATUS_AND_LOG(sgc, msg_type, SGSAP_SGS_CAUSE_MSG_INCOMP_STATE,</span><br><span style="color: hsl(120, 100%, 40%);">+ "SGsAP Message %s with invalid MME-Name, dropping\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* dispatch msg to various handler functions. msgb ownership remains here! */</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (msg_type) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_STATUS:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_status(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_RESET_IND:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_reset_ind(sgc, msg, &tp);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_RESET_ACK:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_reset_ack(sgc, msg, &tp);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_LOC_UPD_REQ:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_loc_upd_req(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_IMSI_DET_IND:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_imsi_det_ind(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_EPS_DET_IND:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_eps_det_ind(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_PAGING_REJ:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_pag_rej(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_UE_UNREACHABLE:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_ue_unr(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_TMSI_REALL_CMPL:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_tmsi_reall_cmpl(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_SERVICE_REQ:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_service_req(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_UL_UD:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_ul_ud(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_MO_CSFB_IND:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_csfb_ind(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_UE_ACT_IND:</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_rx_ue_act_ind(sgc, msg, &tp, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_ALERT_ACK:</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_MSGT_ALERT_REJ:</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR, "Rx unmplemented SGsAP %s: %s\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg_type), msgb_hexdump(msg));</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_status(imsi, SGSAP_SGS_CAUSE_MSG_UNKNOWN, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR, "Rx unknown SGsAP message type 0x%02x: %s\n", msg_type, msgb_hexdump(msg));</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_status(imsi, SGSAP_SGS_CAUSE_MSG_UNKNOWN, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Catch unhandled errors */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: Usually the sgs_rx_ should catch errors locally and</span><br><span style="color: hsl(120, 100%, 40%);">+ * eimit a status message with proper cause code, including</span><br><span style="color: hsl(120, 100%, 40%);">+ * a suitable log message. If we end up here, something is</span><br><span style="color: hsl(120, 100%, 40%);">+ * not right and should be fixed */</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_ERROR, "Rx unable to decode SGsAP %s: %s\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(msg_type), msgb_hexdump(msg));</span><br><span style="color: hsl(120, 100%, 40%);">+ resp = gsm29118_create_status(imsi, SGSAP_SGS_CAUSE_MSG_UNKNOWN, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, resp);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+error:</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/***********************************************************************</span><br><span style="color: hsl(120, 100%, 40%);">+ * SGs connection "VLR Reset Procedure" FSM</span><br><span style="color: hsl(120, 100%, 40%);">+ ***********************************************************************/</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static const struct value_string sgs_vlr_reset_fsm_event_names[] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_VLRR_E_START_RESET, "START-RESET"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_VLRR_E_RX_RESET_ACK, "RX-RESET-ACK"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {0, NULL}</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_vlr_reset_fsm_null(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_VLRR_E_RX_RESET_ACK:</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_vlr_reset_fsm_wait_ack(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_VLRR_E_RX_RESET_ACK:</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_VLRR_ST_COMPLETE, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_vlr_reset_fsm_complete(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_VLRR_E_RX_RESET_ACK:</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_vlr_reset_fsm_allstate(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *reset_ind;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm29118_reset_msg reset_params;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme = (struct sgs_mme_ctx *)fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_connection *sgc = mme->conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = mme->sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_VLRR_E_START_RESET:</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_VLRR_ST_NULL, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ mme->ns11_remaining = sgs->cfg.counter[SGS_STATE_NS11];</span><br><span style="color: hsl(120, 100%, 40%);">+ /* send a reset message and enter WAIT_ACK state */</span><br><span style="color: hsl(120, 100%, 40%);">+ memset(&reset_params, 0, sizeof(reset_params));</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(reset_params.vlr_name, sgs->cfg.vlr_name, sizeof(reset_params.vlr_name));</span><br><span style="color: hsl(120, 100%, 40%);">+ reset_params.vlr_name_present = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ reset_ind = gsm29118_create_reset_ind(&reset_params);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, reset_ind);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_VLRR_ST_WAIT_ACK, sgs->cfg.timer[SGS_STATE_TS11], 11);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_vlr_reset_fsm_timer_cb(struct osmo_fsm_inst *fi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *reset_ind;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm29118_reset_msg reset_params;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme = (struct sgs_mme_ctx *)fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_connection *sgc = mme->conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = mme->sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (fi->T) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case 11:</span><br><span style="color: hsl(120, 100%, 40%);">+ if (mme->ns11_remaining >= 1) {</span><br><span style="color: hsl(120, 100%, 40%);">+ memset(&reset_params, 0, sizeof(reset_params));</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(reset_params.vlr_name, sgs->cfg.vlr_name, sizeof(reset_params.vlr_name));</span><br><span style="color: hsl(120, 100%, 40%);">+ reset_params.vlr_name_present = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ reset_ind = gsm29118_create_reset_ind(&reset_params);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(sgc, reset_ind);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_VLRR_ST_WAIT_ACK, sgs->cfg.timer[SGS_STATE_TS11], 11);</span><br><span style="color: hsl(120, 100%, 40%);">+ mme->ns11_remaining--;</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGMME(mme, LOGL_ERROR, "Ts11 expired more than %u (Ns11) times, giving up\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs->cfg.counter[SGS_STATE_TS11]);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_VLRR_ST_NULL, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static const struct osmo_fsm_state sgs_vlr_reset_fsm_states[] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_VLRR_ST_NULL] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* We haven't even tried yet to send a RESET */</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "NULL",</span><br><span style="color: hsl(120, 100%, 40%);">+ .action = sgs_vlr_reset_fsm_null,</span><br><span style="color: hsl(120, 100%, 40%);">+ .in_event_mask = S(SGS_VLRR_E_RX_RESET_ACK),</span><br><span style="color: hsl(120, 100%, 40%);">+ .out_state_mask = S(SGS_VLRR_ST_NULL) | S(SGS_VLRR_ST_WAIT_ACK),</span><br><span style="color: hsl(120, 100%, 40%);">+ },</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_VLRR_ST_WAIT_ACK] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* We're waiting for a SGsAP_RESET_ACK */</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "WAIT-ACK",</span><br><span style="color: hsl(120, 100%, 40%);">+ .action = sgs_vlr_reset_fsm_wait_ack,</span><br><span style="color: hsl(120, 100%, 40%);">+ .in_event_mask = S(SGS_VLRR_E_RX_RESET_ACK),</span><br><span style="color: hsl(120, 100%, 40%);">+ .out_state_mask = S(SGS_VLRR_ST_NULL) |</span><br><span style="color: hsl(120, 100%, 40%);">+ S(SGS_VLRR_ST_COMPLETE) | S(SGS_VLRR_ST_WAIT_ACK),</span><br><span style="color: hsl(120, 100%, 40%);">+ },</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_VLRR_ST_COMPLETE] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Reset procedure to this MME has been completed */</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "COMPLETE",</span><br><span style="color: hsl(120, 100%, 40%);">+ .action = sgs_vlr_reset_fsm_complete,</span><br><span style="color: hsl(120, 100%, 40%);">+ .in_event_mask = S(SGS_VLRR_E_RX_RESET_ACK),</span><br><span style="color: hsl(120, 100%, 40%);">+ .out_state_mask = S(SGS_VLRR_ST_NULL) | S(SGS_VLRR_ST_COMPLETE),</span><br><span style="color: hsl(120, 100%, 40%);">+ },</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static struct osmo_fsm sgs_vlr_reset_fsm = {</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "SGs-VLR-RESET",</span><br><span style="color: hsl(120, 100%, 40%);">+ .states = sgs_vlr_reset_fsm_states,</span><br><span style="color: hsl(120, 100%, 40%);">+ .allstate_event_mask = S(SGS_VLRR_E_START_RESET),</span><br><span style="color: hsl(120, 100%, 40%);">+ .allstate_action = sgs_vlr_reset_fsm_allstate,</span><br><span style="color: hsl(120, 100%, 40%);">+ .timer_cb = sgs_vlr_reset_fsm_timer_cb,</span><br><span style="color: hsl(120, 100%, 40%);">+ .log_subsys = DSGS,</span><br><span style="color: hsl(120, 100%, 40%);">+ .event_names = sgs_vlr_reset_fsm_event_names,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Send unit-data through SGs interface (see msc_ifaces.c)</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] msg layer 3 message to send.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns 0 in case of success, -EINVAL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_iface_tx_dtap_ud(struct msgb *msg)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct ran_conn *conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *msg_sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc = -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* This function expects a pointer to the related gsm subscriber</span><br><span style="color: hsl(120, 100%, 40%);">+ * connection (conn) in msg->dst. Also conn->vsub must point to</span><br><span style="color: hsl(120, 100%, 40%);">+ * the related subscriber */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(msg->dst);</span><br><span style="color: hsl(120, 100%, 40%);">+ conn = msg->dst;</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(conn->vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = conn->vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_ctx_by_vsub(vsub, SGSAP_MSGT_DL_UD);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Make sure the subscriber has a valid SGs association, otherwise</span><br><span style="color: hsl(120, 100%, 40%);">+ * don't let unit-data through. */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->sgs_fsm->state != SGS_UE_ST_ASSOCIATED) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOG_RAN_CONN(conn, LOGL_NOTICE, "Tx %s subscriber not SGs-associated, dropping\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ sgsap_msg_type_name(SGSAP_MSGT_DL_UD));</span><br><span style="color: hsl(120, 100%, 40%);">+ goto error;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ msg_sgs = gsm29118_create_dl_ud(vsub->imsi, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(mme->conn, msg_sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+error:</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return rc;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Send a relase message through SGs interface (see msc_ifaces.c)</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] msg layer 3 message to send.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns 0 in case of success, -EINVAL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+void sgs_iface_tx_release(struct ran_conn *conn)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *msg_sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_mme_ctx *mme;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /*! Use this function to release an SGs connection normally</span><br><span style="color: hsl(120, 100%, 40%);">+ * (cause code is 0). This function also automatically causes</span><br><span style="color: hsl(120, 100%, 40%);">+ * the VLR subscriber usage to be balanced. */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(conn->vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = conn->vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ mme = sgs_mme_ctx_by_vsub(vsub, SGSAP_MSGT_DL_UD);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!mme)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ msg_sgs = gsm29118_create_release_req(vsub->imsi, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_tx(mme->conn, msg_sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! initalize SGs new interface</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] ctx talloc context</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] network associated gsm network</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns returns allocated sgs_stae, NULL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_state *sgs_iface_init(void *ctx, struct gsm_network *network)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ gsm_network = network;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs = sgs_server_alloc(ctx);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* We currently only support one SGs instance */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (g_sgs)</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ g_sgs = sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_register(&sgs_vlr_reset_fsm);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_server_open(sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span>diff --git a/src/libmsc/sgs_server.c b/src/libmsc/sgs_server.c</span><br><span>new file mode 100644</span><br><span>index 0000000..56f1548</span><br><span>--- /dev/null</span><br><span>+++ b/src/libmsc/sgs_server.c</span><br><span>@@ -0,0 +1,187 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_iface.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/debug.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_server.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/utils.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/socket.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/select.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/netif/stream.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <netinet/sctp.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define LOGSGC(sgc, lvl, fmt, args...) \</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, lvl, "%s: " fmt, (sgc)->sockname, ## args)</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* call-back when data arrives on SGs */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_conn_readable_cb(struct osmo_stream_srv *conn)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_fd *ofd = osmo_stream_srv_get_ofd(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_connection *sgc = osmo_stream_srv_get_data(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *msg = gsm29118_msgb_alloc();</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sctp_sndrcvinfo sinfo;</span><br><span style="color: hsl(120, 100%, 40%);">+ int flags = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* we cannot use osmo_stream_srv_recv() here, as we might get some out-of-band info from</span><br><span style="color: hsl(120, 100%, 40%);">+ * SCTP. FIXME: add something like osmo_stream_srv_recv_sctp() to libosmo-netif and use</span><br><span style="color: hsl(120, 100%, 40%);">+ * it here as well as in libosmo-sigtran */</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sctp_recvmsg(ofd->fd, msgb_data(msg), msgb_tailroom(msg), NULL, NULL, &sinfo, &flags);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_destroy(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = -EBADF;</span><br><span style="color: hsl(120, 100%, 40%);">+ goto out;</span><br><span style="color: hsl(120, 100%, 40%);">+ } else if (rc == 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_destroy(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = -EBADF;</span><br><span style="color: hsl(120, 100%, 40%);">+ goto out;</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_put(msg, rc);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (flags & MSG_NOTIFICATION) {</span><br><span style="color: hsl(120, 100%, 40%);">+ union sctp_notification *notif = (union sctp_notification *)msgb_data(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (notif->sn_header.sn_type) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SCTP_SHUTDOWN_EVENT:</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_destroy(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = -EBADF;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SCTP_ASSOC_CHANGE:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: do we have to notify the SGs code about this? */</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ goto out;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* set l2 header, as that's what we use in SGs code */</span><br><span style="color: hsl(120, 100%, 40%);">+ msg->l2h = msgb_data(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (msgb_sctp_ppid(msg) != 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_NOTICE, "Ignoring SCTP PPID %ld (spec violation)\n", msgb_sctp_ppid(msg));</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* handle message */</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_iface_rx(sgc, msg);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+out:</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return rc;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* call-back when new connection is closed ed on SGs */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_conn_closed_cb(struct osmo_stream_srv *conn)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_connection *sgc = osmo_stream_srv_get_data(conn);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_NOTICE, "Connection lost\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgc->mme) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* unlink ourselves from the MME context */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgc->mme->conn == sgc)</span><br><span style="color: hsl(120, 100%, 40%);">+ sgc->mme->conn = NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ llist_del(&sgc->entry);</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* call-back when new connection is accept() ed on SGs */</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_accept_cb(struct osmo_stream_srv_link *link, int fd)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = osmo_stream_srv_link_get_data(link);</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_connection *sgc = talloc_zero(link, struct sgs_connection);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(sgc);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgc->sgs = sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_sock_get_name_buf(sgc->sockname, sizeof(sgc->sockname), fd);</span><br><span style="color: hsl(120, 100%, 40%);">+ sgc->srv = osmo_stream_srv_create(sgc, link, fd, sgs_conn_readable_cb, sgs_conn_closed_cb, sgc);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!sgc->srv) {</span><br><span style="color: hsl(120, 100%, 40%);">+ talloc_free(sgc);</span><br><span style="color: hsl(120, 100%, 40%);">+ return -1;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGSGC(sgc, LOGL_INFO, "Accepted new SGs connection\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ llist_add_tail(&sgc->entry, &sgs->conn_list);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static struct sgs_state *sgs_state_alloc(void *ctx)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = talloc_zero(ctx, struct sgs_state);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ INIT_LLIST_HEAD(&sgs->mme_list);</span><br><span style="color: hsl(120, 100%, 40%);">+ INIT_LLIST_HEAD(&sgs->conn_list);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ memcpy(sgs->cfg.timer, sgs_state_timer_defaults, sizeof(sgs->cfg.timer));</span><br><span style="color: hsl(120, 100%, 40%);">+ memcpy(sgs->cfg.counter, sgs_state_counter_defaults, sizeof(sgs->cfg.counter));</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs->cfg.local_port = SGS_PORT_DEFAULT;</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(sgs->cfg.local_addr, DEFAULT_SGS_SERVER_IP, sizeof(sgs->cfg.local_addr));</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(sgs->cfg.vlr_name, DEFAULT_SGS_SERVER_VLR_NAME, sizeof(sgs->cfg.vlr_name));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! allocate SGs new sgs state</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] ctx talloc context</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns returns allocated sgs state, NULL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+struct sgs_state *sgs_server_alloc(void *ctx)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_stream_srv_link *link;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs = sgs_state_alloc(ctx);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!sgs)</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs->srv_link = link = osmo_stream_srv_link_create(ctx);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!sgs->srv_link)</span><br><span style="color: hsl(120, 100%, 40%);">+ return NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_nodelay(link, true);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_addr(link, sgs->cfg.local_addr);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_port(link, sgs->cfg.local_port);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_proto(link, IPPROTO_SCTP);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_data(link, sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_accept_cb(link, sgs_accept_cb);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! (re)open SGs interface (SCTP)</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] sgs associated sgs state</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns 0 in case of success, -EINVAL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+int sgs_server_open(struct sgs_state *sgs)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc;</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_fd *ofd = osmo_stream_srv_link_get_ofd(sgs->srv_link);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = osmo_stream_srv_link_open(sgs->srv_link);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR, "SGs socket cannot be opened: %s\n", strerror(errno));</span><br><span style="color: hsl(120, 100%, 40%);">+ return -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_NOTICE, "SGs socket bound to %s\n", osmo_sock_get_name2(ofd->fd));</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span>diff --git a/src/libmsc/sgs_vty.c b/src/libmsc/sgs_vty.c</span><br><span>new file mode 100644</span><br><span>index 0000000..5b26178</span><br><span>--- /dev/null</span><br><span>+++ b/src/libmsc/sgs_vty.c</span><br><span>@@ -0,0 +1,197 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <string.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <errno.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/utils.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/msgb.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vty.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/netif/stream.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_iface.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_server.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/debug.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/tlv.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+struct cmd_node cfg_sgs_node = {</span><br><span style="color: hsl(120, 100%, 40%);">+ CFG_SGS_NODE,</span><br><span style="color: hsl(120, 100%, 40%);">+ "%s(config-sgs)# ",</span><br><span style="color: hsl(120, 100%, 40%);">+ 1</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+DEFUN(cfg_sgs, cfg_sgs_cmd,</span><br><span style="color: hsl(120, 100%, 40%);">+ "sgs",</span><br><span style="color: hsl(120, 100%, 40%);">+ "Configure the SGs interface\n")</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ vty->index = g_sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+ vty->node = CFG_SGS_NODE;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+DEFUN(cfg_sgs_local_ip, cfg_sgs_local_ip_cmd,</span><br><span style="color: hsl(120, 100%, 40%);">+ "local-ip A.B.C.D",</span><br><span style="color: hsl(120, 100%, 40%);">+ "Set the Local IP Address of the SGs interface\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "Local IP Address of the SGs interface\n")</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = vty->index;</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(sgs->cfg.local_addr, argv[0], sizeof(sgs->cfg.local_addr));</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_addr(sgs->srv_link, sgs->cfg.local_addr);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_server_open(sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, "%% SGs socket cannot be opened: %s%s", strerror(errno), VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_WARNING;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+DEFUN(cfg_sgs_local_port, cfg_sgs_local_port_cmd,</span><br><span style="color: hsl(120, 100%, 40%);">+ "local-port <0-65535>",</span><br><span style="color: hsl(120, 100%, 40%);">+ "Set the local SCTP port of the SGs interface\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "Local SCTP port of the SGs interface\n")</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = vty->index;</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs->cfg.local_port = atoi(argv[0]);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_stream_srv_link_set_port(sgs->srv_link, sgs->cfg.local_port);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = sgs_server_open(sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc < 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, "%% SGs socket cannot be opened: %s%s", strerror(errno), VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_WARNING;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+DEFUN(cfg_sgs_vlr_name, cfg_sgs_vlr_name_cmd,</span><br><span style="color: hsl(120, 100%, 40%);">+ "vlr-name FQDN",</span><br><span style="color: hsl(120, 100%, 40%);">+ "Set the SGs VLR Name as per TS 29.118 9.4.22\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "Fully-Qualified Domain Name of this VLR\n")</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = vty->index;</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(sgs->cfg.vlr_name, argv[0], sizeof(sgs->cfg.vlr_name));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+DEFUN(cfg_sgs_timer, cfg_sgs_timer_cmd,</span><br><span style="color: hsl(120, 100%, 40%);">+ "timer (ts5|ts6-2|ts7|ts11|ts14|ts15) <1-120>",</span><br><span style="color: hsl(120, 100%, 40%);">+ "Configure SGs Timer\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "Paging procedure guard timer\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "TMSI reallocation guard timer\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "Non-EPS alert procedure guard timer\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "VLR reset guard timer\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "UE fallback prcoedure timer\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "MO UE fallback procedure guard timer\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "Time in seconds\n")</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = vty->index;</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int i;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ for (i = 0; i < ARRAY_SIZE(sgs->cfg.timer); i++) {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!strcasecmp(argv[0], vlr_sgs_state_timer_name(i))) {</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs->cfg.timer[i] = atoi(argv[1]);</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_WARNING;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+DEFUN(cfg_sgs_counter, cfg_sgs_counter_cmd,</span><br><span style="color: hsl(120, 100%, 40%);">+ "counter (ns7|ns11) <0-255>",</span><br><span style="color: hsl(120, 100%, 40%);">+ "Configure SGs Counter\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "Non-EPS alert request retry counter\n"</span><br><span style="color: hsl(120, 100%, 40%);">+ "VLR reset retry counter\n" "Counter value\n")</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = vty->index;</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int i = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ for (i = 0; i < ARRAY_SIZE(sgs->cfg.counter); i++) {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!strcasecmp(argv[0], vlr_sgs_state_counter_name(i))) {</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs->cfg.counter[i] = atoi(argv[1]);</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_WARNING;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+DEFUN(show_sgs_conn, show_sgs_conn_cmd,</span><br><span style="color: hsl(120, 100%, 40%);">+ "show sgs-connections", SHOW_STR</span><br><span style="color: hsl(120, 100%, 40%);">+ "Show SGs interface connections / MMEs\n")</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_connection *sgc;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ llist_for_each_entry(sgc, &g_sgs->conn_list, entry) {</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " %s %s%s", sgc->sockname, sgc->mme ? sgc->mme->fqdn : "", VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static int config_write_sgs(struct vty *vty)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_state *sgs = g_sgs;</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int i;</span><br><span style="color: hsl(120, 100%, 40%);">+ char str_buf[256];</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, "sgs%s", VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs->cfg.local_port != SGS_PORT_DEFAULT)</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " local-port %u%s", sgs->cfg.local_port, VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs->cfg.local_addr)</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " local-ip %s%s", sgs->cfg.local_addr, VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs->cfg.vlr_name)</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " vlr-name %s%s", sgs->cfg.vlr_name, VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ for (i = 0; i < ARRAY_SIZE(sgs->cfg.timer); i++) {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs->cfg.timer[i] == sgs_state_timer_defaults[i])</span><br><span style="color: hsl(120, 100%, 40%);">+ continue;</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_str_tolower_buf(str_buf, sizeof(str_buf), vlr_sgs_state_timer_name(i));</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " timer %s %u%s", str_buf, sgs->cfg.timer[i], VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ for (i = 0; i < ARRAY_SIZE(sgs->cfg.counter); i++) {</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs->cfg.counter[i] == sgs_state_counter_defaults[i])</span><br><span style="color: hsl(120, 100%, 40%);">+ continue;</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_str_tolower_buf(str_buf, sizeof(str_buf), vlr_sgs_state_counter_name(i));</span><br><span style="color: hsl(120, 100%, 40%);">+ vty_out(vty, " counter %s %u%s", str_buf, sgs->cfg.counter[i], VTY_NEWLINE);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return CMD_SUCCESS;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+void sgs_vty_init(void)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ /* configuration commands / nodes */</span><br><span style="color: hsl(120, 100%, 40%);">+ install_element(CONFIG_NODE, &cfg_sgs_cmd);</span><br><span style="color: hsl(120, 100%, 40%);">+ install_node(&cfg_sgs_node, config_write_sgs);</span><br><span style="color: hsl(120, 100%, 40%);">+ install_element(CFG_SGS_NODE, &cfg_sgs_local_ip_cmd);</span><br><span style="color: hsl(120, 100%, 40%);">+ install_element(CFG_SGS_NODE, &cfg_sgs_local_port_cmd);</span><br><span style="color: hsl(120, 100%, 40%);">+ install_element(CFG_SGS_NODE, &cfg_sgs_timer_cmd);</span><br><span style="color: hsl(120, 100%, 40%);">+ install_element(CFG_SGS_NODE, &cfg_sgs_counter_cmd);</span><br><span style="color: hsl(120, 100%, 40%);">+ install_element(CFG_SGS_NODE, &cfg_sgs_vlr_name_cmd);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ install_element_ve(&show_sgs_conn_cmd);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span>diff --git a/src/libmsc/silent_call.c b/src/libmsc/silent_call.c</span><br><span>index b4fc154..2a9fa9c 100644</span><br><span>--- a/src/libmsc/silent_call.c</span><br><span>+++ b/src/libmsc/silent_call.c</span><br><span>@@ -128,7 +128,8 @@</span><br><span> * This doesn't apply to the situation after MSCSPLIT with an</span><br><span> * A-interface. */</span><br><span> req = subscr_request_conn(vsub, paging_cb_silent, data,</span><br><span style="color: hsl(0, 100%, 40%);">- "establish silent call");</span><br><span style="color: hsl(120, 100%, 40%);">+ "establish silent call",</span><br><span style="color: hsl(120, 100%, 40%);">+ SGSAP_SERV_IND_CS_CALL);</span><br><span> if (!req)</span><br><span> return -ENODEV;</span><br><span> return 0;</span><br><span>diff --git a/src/libvlr/Makefile.am b/src/libvlr/Makefile.am</span><br><span>index dcae1c7..14cd302 100644</span><br><span>--- a/src/libvlr/Makefile.am</span><br><span>+++ b/src/libvlr/Makefile.am</span><br><span>@@ -8,6 +8,7 @@</span><br><span> $(LIBOSMOGSUPCLIENT_CFLAGS) \</span><br><span> $(LIBOSMOABIS_CFLAGS) \</span><br><span> $(LIBOSMORANAP_CFLAGS) \</span><br><span style="color: hsl(120, 100%, 40%);">+ $(LIBOSMOGSM_CFLAGS) \</span><br><span> $(COVERAGE_CFLAGS) \</span><br><span> $(NULL)</span><br><span> </span><br><span>@@ -16,6 +17,7 @@</span><br><span> vlr_auth_fsm.h \</span><br><span> vlr_core.h \</span><br><span> vlr_lu_fsm.h \</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_fsm.h \</span><br><span> $(NULL)</span><br><span> </span><br><span> noinst_LIBRARIES = libvlr.a</span><br><span>@@ -25,4 +27,6 @@</span><br><span> vlr_access_req_fsm.c \</span><br><span> vlr_auth_fsm.c \</span><br><span> vlr_lu_fsm.c \</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs.c \</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_fsm.c \</span><br><span> $(NULL)</span><br><span>diff --git a/src/libvlr/vlr.c b/src/libvlr/vlr.c</span><br><span>index 451c521..c5b3c80 100644</span><br><span>--- a/src/libvlr/vlr.c</span><br><span>+++ b/src/libvlr/vlr.c</span><br><span>@@ -30,6 +30,7 @@</span><br><span> #include <osmocom/gsm/ipa.h></span><br><span> #include <osmocom/msc/gsm_subscriber.h></span><br><span> #include <osmocom/gsupclient/gsup_client.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr_sgs.h></span><br><span> #include <osmocom/msc/vlr.h></span><br><span> #include <osmocom/msc/debug.h></span><br><span> </span><br><span>@@ -42,6 +43,7 @@</span><br><span> #include "vlr_auth_fsm.h"</span><br><span> #include "vlr_lu_fsm.h"</span><br><span> #include "vlr_access_req_fsm.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "vlr_sgs_fsm.h"</span><br><span> </span><br><span> #define SGSN_SUBSCR_MAX_RETRIES 3</span><br><span> #define SGSN_SUBSCR_RETRY_INTERVAL 10</span><br><span>@@ -262,6 +264,11 @@</span><br><span> INIT_LLIST_HEAD(&vsub->cs.requests);</span><br><span> INIT_LLIST_HEAD(&vsub->ps.pdp_list);</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ /* Create an SGs FSM, which is needed to control CSFB,</span><br><span style="color: hsl(120, 100%, 40%);">+ * in cases where CSFB/SGs is not in use, this FSM will</span><br><span style="color: hsl(120, 100%, 40%);">+ * just do nothing. (see also: sgs_iface.c) */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_fsm_create(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> llist_add_tail(&vsub->list, &vlr->subscribers);</span><br><span> return vsub;</span><br><span> }</span><br><span>@@ -307,6 +314,13 @@</span><br><span> {</span><br><span> llist_del(&vsub->list);</span><br><span> DEBUGP(DREF, "freeing VLR subscr %s\n", vlr_subscr_name(vsub));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Make sure SGs timer Ts5 is removed */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_del(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Remove SGs FSM (see also: sgs_iface.c) */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_fsm_remove(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> talloc_free(vsub);</span><br><span> }</span><br><span> </span><br><span>@@ -854,7 +868,13 @@</span><br><span> static int vlr_subscr_handle_lu_res(struct vlr_subscr *vsub,</span><br><span> const struct osmo_gsup_message *gsup)</span><br><span> {</span><br><span style="color: hsl(0, 100%, 40%);">- if (!vsub->lu_fsm) {</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_lu_response sgs_lu_response;</span><br><span style="color: hsl(120, 100%, 40%);">+ bool sgs_lu_in_progress = false;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->sgs_fsm->state == SGS_UE_ST_LA_UPD_PRES)</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_lu_in_progress = true;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub->lu_fsm && !sgs_lu_in_progress) {</span><br><span> LOGVSUBP(LOGL_ERROR, vsub, "Rx GSUP LU Result "</span><br><span> "without LU in progress\n");</span><br><span> return -ENODEV;</span><br><span>@@ -865,7 +885,12 @@</span><br><span> * nested INSERT SUBSCRIBER DATA transaction */</span><br><span> vlr_subscr_gsup_insert_data(vsub, gsup);</span><br><span> </span><br><span style="color: hsl(0, 100%, 40%);">- osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_LU_RES, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs_lu_in_progress) {</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_lu_response.accepted = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_lu_response.vsub = vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.response_cb(&sgs_lu_response);</span><br><span style="color: hsl(120, 100%, 40%);">+ } else</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_LU_RES, NULL);</span><br><span> </span><br><span> return 0;</span><br><span> }</span><br><span>@@ -874,7 +899,13 @@</span><br><span> static int vlr_subscr_handle_lu_err(struct vlr_subscr *vsub,</span><br><span> const struct osmo_gsup_message *gsup)</span><br><span> {</span><br><span style="color: hsl(0, 100%, 40%);">- if (!vsub->lu_fsm) {</span><br><span style="color: hsl(120, 100%, 40%);">+ struct sgs_lu_response sgs_lu_response;</span><br><span style="color: hsl(120, 100%, 40%);">+ bool sgs_lu_in_progress = false;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->sgs_fsm->state == SGS_UE_ST_LA_UPD_PRES)</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_lu_in_progress = true;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub->lu_fsm && !sgs_lu_in_progress) {</span><br><span> LOGVSUBP(LOGL_ERROR, vsub, "Rx GSUP LU Error "</span><br><span> "without LU in progress\n");</span><br><span> return -ENODEV;</span><br><span>@@ -883,9 +914,13 @@</span><br><span> LOGVSUBP(LOGL_DEBUG, vsub, "UpdateLocation failed; gmm_cause: %s\n",</span><br><span> get_value_string(gsm48_gmm_cause_names, gsup->cause));</span><br><span> </span><br><span style="color: hsl(0, 100%, 40%);">- osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_LU_RES,</span><br><span style="color: hsl(0, 100%, 40%);">- (void *)&gsup->cause);</span><br><span style="color: hsl(0, 100%, 40%);">-</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sgs_lu_in_progress) {</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_lu_response.accepted = false;</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_lu_response.vsub = vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.response_cb(&sgs_lu_response);</span><br><span style="color: hsl(120, 100%, 40%);">+ } else</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_LU_RES,</span><br><span style="color: hsl(120, 100%, 40%);">+ (void *)&gsup->cause);</span><br><span> return 0;</span><br><span> }</span><br><span> </span><br><span>@@ -1225,6 +1260,9 @@</span><br><span> vsub->imsi_detached_flag = true;</span><br><span> vsub->expire_lu = VLR_SUBSCRIBER_NO_EXPIRATION;</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ /* Inform the UE-SGs FSM that the subscriber has been detached */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_RX_DETACH_IND_FROM_UE, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> vlr_subscr_expire(vsub);</span><br><span> </span><br><span> return 0;</span><br><span>@@ -1273,6 +1311,8 @@</span><br><span> vlr_lu_fsm_init();</span><br><span> /* vlr_access_request_fsm.c */</span><br><span> vlr_parq_fsm_init();</span><br><span style="color: hsl(120, 100%, 40%);">+ /* vlr_sgs_fsm.c */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_fsm_init();</span><br><span> </span><br><span> return vlr;</span><br><span> }</span><br><span>diff --git a/src/libvlr/vlr_lu_fsm.c b/src/libvlr/vlr_lu_fsm.c</span><br><span>index a97e97a..8152d20 100644</span><br><span>--- a/src/libvlr/vlr_lu_fsm.c</span><br><span>+++ b/src/libvlr/vlr_lu_fsm.c</span><br><span>@@ -27,6 +27,7 @@</span><br><span> #include "vlr_core.h"</span><br><span> #include "vlr_auth_fsm.h"</span><br><span> #include "vlr_lu_fsm.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "vlr_sgs_fsm.h"</span><br><span> </span><br><span> #define S(x) (1 << (x))</span><br><span> </span><br><span>@@ -362,6 +363,7 @@</span><br><span> vlr_subscr_get(vsub);</span><br><span> }</span><br><span> _vlr_lu_compl_fsm_done(fi, VLR_FSM_RESULT_SUCCESS, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_fsm_update_id(vsub);</span><br><span> }</span><br><span> </span><br><span> static void vlr_lu_compl_fsm_failure(struct osmo_fsm_inst *fi, uint8_t cause)</span><br><span>@@ -1055,6 +1057,11 @@</span><br><span> </span><br><span> OSMO_ASSERT(lfp->vsub);</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ /* At this point we know for which subscriber the location update is,</span><br><span style="color: hsl(120, 100%, 40%);">+ * we now must inform SGs-UE FSM that we received a location update</span><br><span style="color: hsl(120, 100%, 40%);">+ * via A, IU or Gs interface. */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(lfp->vsub->sgs_fsm, SGS_UE_E_RX_LU_FROM_A_IU_GS, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> /* See 3GPP TS 23.012, procedure Retrieve_IMEISV_If_Required */</span><br><span> if ((!vlr->cfg.retrieve_imeisv_early)</span><br><span> || (lfp->type == VLR_LU_TYPE_PERIODIC && lfp->vsub->imeisv[0])) {</span><br><span>diff --git a/src/libvlr/vlr_sgs.c b/src/libvlr/vlr_sgs.c</span><br><span>new file mode 100644</span><br><span>index 0000000..8614892</span><br><span>--- /dev/null</span><br><span>+++ b/src/libvlr/vlr_sgs.c</span><br><span>@@ -0,0 +1,331 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/utils.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/fsm.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/debug.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr_sgs.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include "vlr_sgs_fsm.h"</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+const struct value_string sgs_state_timer_names[] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_TS5, "Ts5"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_TS6_2, "Ts6-2"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_TS7, "Ts7"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_TS11, "Ts11"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_TS14, "Ts14"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_TS15, "Ts15"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {0, NULL}</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+const struct value_string sgs_state_counter_names[] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_NS7, "Ns7"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_STATE_NS11, "Ns11"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {0, NULL}</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Reset all SGs-Associations back to zero.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vlr VLR instace. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_reset(struct vlr_instance *vlr)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(vlr);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DVLR, LOGL_INFO, "dropping all SGs associations.\n");</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ llist_for_each_entry(vsub, &vlr->subscribers, list) {</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_RX_RESET_FROM_MME, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Perform an SGs location update.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vlr VLR instace.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] cfg SGs interface configuration parameters.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] response_cb calback function that is called when LU is done.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] paging_cb calback function that is called when LU needs to page.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] mminfo_cb calback function that is called to provide MM info to the UE.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] mme_name fqdn of the requesting MME (mme-name).</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] type location update type (normal or IMSI attach).</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] imsi mobile identity (IMSI).</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] new_lai identifier of the new location area.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \returns 0 in case of success, -EINVAL in case of error. */</span><br><span style="color: hsl(120, 100%, 40%);">+int vlr_sgs_loc_update(struct vlr_instance *vlr, struct vlr_sgs_cfg *cfg,</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_lu_response_cb_t response_cb, vlr_sgs_lu_paging_cb_t paging_cb,</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_lu_mminfo_cb_t mminfo_cb, char *mme_name, enum vlr_lu_type type, const char *imsi,</span><br><span style="color: hsl(120, 100%, 40%);">+ struct osmo_location_area_id *new_lai)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(response_cb);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(paging_cb);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(mminfo_cb);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(cfg);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_or_create_by_imsi(vlr, imsi, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR, "VLR subscriber allocation failed\n");</span><br><span style="color: hsl(120, 100%, 40%);">+ return -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.cfg = *cfg;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.response_cb = response_cb;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.paging_cb = paging_cb;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.mminfo_cb = mminfo_cb;</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_set_imsi(vsub, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_strlcpy(vsub->sgs.mme_name, mme_name, sizeof(vsub->sgs.mme_name));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_RX_LU_FROM_MME, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: Use the "type" type parameter (for what is it useful?) */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.lai = *new_lai;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->cgi.lai = *new_lai;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->cs.lac = vsub->sgs.lai.lac;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Notify that the SGs Location Update accept message has been sent to MME.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_loc_update_acc_sent(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_TX_LU_ACCEPT, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: At this point we need to check the status of Ts5 and if</span><br><span style="color: hsl(120, 100%, 40%);">+ * it is still running this means the LU has interrupted the paging,</span><br><span style="color: hsl(120, 100%, 40%);">+ * and we need to start paging again. 3GPP TS 29.118,</span><br><span style="color: hsl(120, 100%, 40%);">+ * chapter 5.2.3.2 */</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Notify that the SGs Location Update reject message has been sent to MME.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_loc_update_rej_sent(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_TX_LU_REJECT, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Perform an SGs IMSI detach.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] imsi mobile identity (IMSI).</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] type datach type. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_imsi_detach(struct vlr_instance *vlr, const char *imsi, enum sgsap_imsi_det_noneps_type type)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgs_ue_fsm_event evt;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (type) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_NONEPS_T_EXPLICIT_UE_NONEPS:</span><br><span style="color: hsl(120, 100%, 40%);">+ evt = SGS_UE_E_RX_DETACH_IND_FROM_UE;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_NONEPS_T_COMBINED_UE_EPS_NONEPS:</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_NONEPS_T_IMPLICIT_UE_EPS_NONEPS:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: Is that right? */</span><br><span style="color: hsl(120, 100%, 40%);">+ evt = SGS_UE_E_RX_DETACH_IND_FROM_MME;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR, "(sub %s) invalid SGS IMSI detach type, detaching anyway...\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_msisdn_or_name(vsub));</span><br><span style="color: hsl(120, 100%, 40%);">+ evt = SGS_UE_E_RX_DETACH_IND_FROM_MME;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, evt, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Perform an SGs EPS detach.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] imsi mobile identity (IMSI).</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] type datach type. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_eps_detach(struct vlr_instance *vlr, const char *imsi, enum sgsap_imsi_det_eps_type type)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgs_ue_fsm_event evt;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (type) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_EPS_T_NETWORK_INITIATED:</span><br><span style="color: hsl(120, 100%, 40%);">+ evt = SGS_UE_E_RX_DETACH_IND_FROM_MME;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_EPS_T_UE_INITIATED:</span><br><span style="color: hsl(120, 100%, 40%);">+ evt = SGS_UE_E_RX_DETACH_IND_FROM_UE;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGSAP_ID_EPS_T_EPS_NOT_ALLOWED:</span><br><span style="color: hsl(120, 100%, 40%);">+ evt = SGS_UE_E_RX_DETACH_IND_FROM_MME;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR, "(sub %s) invalid SGS IMSI detach type, detaching anyway...\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_msisdn_or_name(vsub));</span><br><span style="color: hsl(120, 100%, 40%);">+ evt = SGS_UE_E_RX_DETACH_IND_FROM_MME;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, evt, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Perform an SGs TMSI reallocation complete.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] imsi mobile identity (IMSI). */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_tmsi_reall_compl(struct vlr_instance *vlr, const char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_RX_TMSI_REALLOC, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Notify that an SGs paging has been rejected by the MME.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] imsi mobile identity (IMSI).</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] cause SGs cause code. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_pag_rej(struct vlr_instance *vlr, const char *imsi, enum sgsap_sgs_cause cause)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* On the reception of a paging rej the VLR is supposed to stop Ts5,</span><br><span style="color: hsl(120, 100%, 40%);">+ also 3GPP TS 29.118, chapter 5.1.2.4 */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_del(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_DEBUG, "(sub %s) Paging via SGs interface rejected by MME, %s stopped, cause: %s!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_msisdn_or_name(vsub), vlr_sgs_state_timer_name(SGS_STATE_TS5), sgsap_sgs_cause_name(cause));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_RX_PAGING_FAILURE, &cause);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Balance ref count increment from vlr_sgs_pag() */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Notify that an SGs paging has been accepted by the MME.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] imsi mobile identity (IMSI). */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_pag_ack(struct vlr_instance *vlr, const char *imsi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Stop Ts5 and and consider the paging as successful */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_del(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Balance ref count increment from vlr_sgs_pag() */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Notify that the UE has been marked as unreachable by the MME.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] imsi mobile identity (IMSI).</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] cause SGs cause code. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_ue_unr(struct vlr_instance *vlr, const char *imsi, enum sgsap_sgs_cause cause)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub = vlr_subscr_find_by_imsi(vlr, imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* On the reception of an UE unreachable the VLR is supposed to stop</span><br><span style="color: hsl(120, 100%, 40%);">+ * Ts5, also 3GPP TS 29.118, chapter 5.1.2.5 */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_del(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_DEBUG,</span><br><span style="color: hsl(120, 100%, 40%);">+ "(sub %s) Paging via SGs interface not possible, UE unreachable, %s stopped, cause: %s\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_msisdn_or_name(vsub), vlr_sgs_state_timer_name(SGS_STATE_TS5), sgsap_sgs_cause_name(cause));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_RX_SGSAP_UE_UNREACHABLE, &cause);</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Callback function that is called when an SGs paging request times out */</span><br><span style="color: hsl(120, 100%, 40%);">+static void Ts5_timeout_cb(void *arg)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = arg;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* 3GPP TS 29.118 does not specify a specif action that has to happen</span><br><span style="color: hsl(120, 100%, 40%);">+ * in case Ts5 times out. The timeout just indicates that the paging</span><br><span style="color: hsl(120, 100%, 40%);">+ * failed. Other actions may check the status of Ts5 to see if a paging</span><br><span style="color: hsl(120, 100%, 40%);">+ * is still ongoing or not. */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGP(DSGS, LOGL_ERROR, "(sub %s) Paging via SGs interface timed out (%s expired)!\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_msisdn_or_name(vsub), vlr_sgs_state_timer_name(SGS_STATE_TS5));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Balance ref count increment from vlr_sgs_pag() */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_put(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Notify that a paging message has been sent and a paging is now in progress.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_pag(struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* In cases where we have to respawn a paging after an intermitted LU,</span><br><span style="color: hsl(120, 100%, 40%);">+ * there may e a Ts5 still running. In those cases we have to remove</span><br><span style="color: hsl(120, 100%, 40%);">+ * the old timer first */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (osmo_timer_pending(&vsub->sgs.Ts5))</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_del(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: 3GPP TS 29.118, chapter 4.2.2 mentions paging in the FSM</span><br><span style="color: hsl(120, 100%, 40%);">+ * diagram, but paging never causes a state transition except when</span><br><span style="color: hsl(120, 100%, 40%);">+ * an explicit failure is indicated (MME actively rejects paging).</span><br><span style="color: hsl(120, 100%, 40%);">+ * Apparantly it is also possible that an LU happens while the paging</span><br><span style="color: hsl(120, 100%, 40%);">+ * is still ongoing and Ts5 is running. (chapter 5.1.2.3). This means</span><br><span style="color: hsl(120, 100%, 40%);">+ * that the paging procedure is intended to run in parallel to the</span><br><span style="color: hsl(120, 100%, 40%);">+ * SGs FSM and given that the benaviour around Ts5 must be implemented</span><br><span style="color: hsl(120, 100%, 40%);">+ * also separately, to emphasize this separation Ts5 is implemented</span><br><span style="color: hsl(120, 100%, 40%);">+ * here in and not in vlr_sgs_fsm.c. */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_setup(&vsub->sgs.Ts5, Ts5_timeout_cb, vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_schedule(&vsub->sgs.Ts5, vsub->sgs.cfg.timer[SGS_STATE_TS5], 0);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Formally 3GPP TS 29.118 defines the sending of a paging request</span><br><span style="color: hsl(120, 100%, 40%);">+ * as an event, but as far as the VLR is concerned only Ts5 is</span><br><span style="color: hsl(120, 100%, 40%);">+ * started. */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_dispatch(vsub->sgs_fsm, SGS_UE_E_TX_PAGING, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Memorize service type in for the case that the paging must be</span><br><span style="color: hsl(120, 100%, 40%);">+ * respawned after an LU */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.paging_serv_ind = serv_ind;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Ensure that the reference count is increased by one while the</span><br><span style="color: hsl(120, 100%, 40%);">+ * paging is happening. We will balance this again in vlr_sgs_pag_rej()</span><br><span style="color: hsl(120, 100%, 40%);">+ * and vlr_sgs_pag_ack(); */</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_get(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Check if the SGs interface is currently paging</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber. */</span><br><span style="color: hsl(120, 100%, 40%);">+bool vlr_sgs_pag_pend(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ return osmo_timer_pending(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span>diff --git a/src/libvlr/vlr_sgs_fsm.c b/src/libvlr/vlr_sgs_fsm.c</span><br><span>new file mode 100644</span><br><span>index 0000000..ee1d748</span><br><span>--- /dev/null</span><br><span>+++ b/src/libvlr/vlr_sgs_fsm.c</span><br><span>@@ -0,0 +1,386 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/utils.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/fsm.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/gsm48.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/debug.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/vlr_sgs.h></span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#include "vlr_sgs_fsm.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "vlr_core.h"</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#define S(x) (1 << (x))</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static const struct value_string sgs_ue_fsm_event_names[] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_VLR_FAILURE, "VLR_FAILURE"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_RESET_FROM_MME, "RX_RESET_FROM_MME"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_DETACH_IND_FROM_MME, "RX_DETACH_IND_FROM_MME"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_DETACH_IND_FROM_UE, "RX_DETACH_IND_FROM_UE"}, /* vlr.c */</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_LU_FROM_A_IU_GS, "RX_LU_FROM_A_Iu_Gs"}, /* vlr_lu_fsm.c */</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_PAGING_FAILURE, "RX_PAGING_FAILURE"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_ALERT_FAILURE, "RX_ALERT_FAILURE"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_LU_FROM_MME, "RX_LU_FROM_MME"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_TX_LU_REJECT, "TX_LU_REJECT"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_TX_LU_ACCEPT, "TX_LU_ACCEPT"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_TX_PAGING, "TX_PAGING"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_SGSAP_UE_UNREACHABLE, "RX_SGSAP_UE_UNREACH"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {SGS_UE_E_RX_TMSI_REALLOC, "RX_TMSI_REALLOC"},</span><br><span style="color: hsl(120, 100%, 40%);">+ {0, NULL}</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Initiate location update and change to SGS_UE_ST_LA_UPD_PRES state */</span><br><span style="color: hsl(120, 100%, 40%);">+static void perform_lu(struct osmo_fsm_inst *fi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+ int rc;</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_UE_ST_LA_UPD_PRES, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->ms_not_reachable_flag = false;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: At the moment we allocate a new TMSI on each LU. */</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = vlr_subscr_alloc_tmsi(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc != 0)</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGPFSML(fi, LOGL_ERROR, "(sub %s) VLR LU tmsi allocation failed\n", vlr_subscr_name(vsub));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ rc = vlr_subscr_req_lu(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (rc != 0)</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGPFSML(fi, LOGL_ERROR, "(sub %s) HLR LU request failed\n", vlr_subscr_name(vsub));</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Send the SGs Association to NULL state immediately */</span><br><span style="color: hsl(120, 100%, 40%);">+static void to_null(struct osmo_fsm_inst *fi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_UE_ST_NULL, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: This is only relevent for cases where we are in the middle</span><br><span style="color: hsl(120, 100%, 40%);">+ * of an TMSI reallocation procedure. Should a failure of some sort</span><br><span style="color: hsl(120, 100%, 40%);">+ * put us to NULL state, we have to free the pending TMSI */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->tmsi_new = GSM_RESERVED_TMSI;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Make sure any ongoing paging is aborted. */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->cs.is_paging = false;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Ensure that Ts5 (pending paging via SGs) is deleted */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vlr_sgs_pag_pend(vsub))</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_del(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Respawn a pending paging (Timer is reset and a new paging request is sent) */</span><br><span style="color: hsl(120, 100%, 40%);">+static void respawn_paging(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vlr_sgs_pag_pend(vsub)) {</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Delete the old paging timer first. */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_timer_del(&vsub->sgs.Ts5);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Issue a fresh paging request */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.paging_cb(vsub, vsub->sgs.paging_serv_ind);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Figure 4.2.2.1 SGs-NULL */</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_ue_fsm_null(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_LU_FROM_MME:</span><br><span style="color: hsl(120, 100%, 40%);">+ perform_lu(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_TX_PAGING:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* do nothing */</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_PAGING_FAILURE:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* do nothing */</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Figure 4.2.2.1 SGs-LA-UPDATE-PRESENT */</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_ue_fsm_lau_present(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_sgs_cause *cause = NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_TX_LU_ACCEPT:</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->conf_by_radio_contact_ind = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sub_dataconf_by_hlr_ind = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->loc_conf_in_hlr_ind = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->la_allowed = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->imsi_detached_flag = false;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->lu_complete = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_sgs_fsm_update_id(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->cs.attached_via_ran = OSMO_RAT_EUTRAN_SGS;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Check if we expect a TMSI REALLOCATION COMPLETE message from the MME</span><br><span style="color: hsl(120, 100%, 40%);">+ * by checking the tmsi_new flag. If this flag is not GSM_RESERVED_TMSI</span><br><span style="color: hsl(120, 100%, 40%);">+ * we know that we have a TMSI pending and need to wait for the MME</span><br><span style="color: hsl(120, 100%, 40%);">+ * to acknowlege first */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->tmsi_new != GSM_RESERVED_TMSI) {</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_UE_ST_ASSOCIATED, vsub->sgs.cfg.timer[SGS_STATE_TS6_2],</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_STATE_TS6_2);</span><br><span style="color: hsl(120, 100%, 40%);">+ } else {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Trigger sending of an MM information request */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.mminfo_cb(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* In cases where the LU has interrupted the paging, respawn the paging now,</span><br><span style="color: hsl(120, 100%, 40%);">+ * See also: 3GPP TS 29.118, chapter 5.2.3.2 Location update response */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vlr_sgs_pag_pend(vsub))</span><br><span style="color: hsl(120, 100%, 40%);">+ respawn_paging(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_UE_ST_ASSOCIATED, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_PAGING_FAILURE:</span><br><span style="color: hsl(120, 100%, 40%);">+ cause = data;</span><br><span style="color: hsl(120, 100%, 40%);">+ if (*cause == SGSAP_SGS_CAUSE_MT_CSFB_REJ_USER)</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ to_null(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_TX_LU_REJECT:</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_ALERT_FAILURE:</span><br><span style="color: hsl(120, 100%, 40%);">+ to_null(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_TX_PAGING:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* do nothing */</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Figure 4.2.2.1 SGs-ASSOCIATED */</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_ue_fsm_associated(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+ enum sgsap_sgs_cause *cause = NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_TX_PAGING:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* do nothing */</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_TMSI_REALLOC:</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vsub->tmsi_new == GSM_RESERVED_TMSI) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGPFSML(fi, LOGL_ERROR,</span><br><span style="color: hsl(120, 100%, 40%);">+ "(sub %s) TMSI reallocation completed at the MME, but no TMSI reallocation ordered.\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr_subscr_msisdn_or_name(vsub));</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->tmsi = vsub->tmsi_new;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->tmsi_new = GSM_RESERVED_TMSI;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Trigger sending of MM information */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs.mminfo_cb(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* In cases where the LU has interrupted the paging, respawn the paging now,</span><br><span style="color: hsl(120, 100%, 40%);">+ * See also: 3GPP TS 29.118, chapter 5.2.3.2 Location update response */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (vlr_sgs_pag_pend(vsub))</span><br><span style="color: hsl(120, 100%, 40%);">+ respawn_paging(vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Note: We are already in SGS_UE_ST_ASSOCIATED but the</span><br><span style="color: hsl(120, 100%, 40%);">+ * transition that lead us here had is guarded with Ts6-1,</span><br><span style="color: hsl(120, 100%, 40%);">+ * wo we change the state now once more without timeout</span><br><span style="color: hsl(120, 100%, 40%);">+ * to ensure the timer is stopped */</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(fi, SGS_UE_ST_ASSOCIATED, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_SGSAP_UE_UNREACHABLE:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* do nothing */</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_PAGING_FAILURE:</span><br><span style="color: hsl(120, 100%, 40%);">+ cause = data;</span><br><span style="color: hsl(120, 100%, 40%);">+ if (*cause == SGSAP_SGS_CAUSE_MT_CSFB_REJ_USER)</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ to_null(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_ALERT_FAILURE:</span><br><span style="color: hsl(120, 100%, 40%);">+ to_null(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_LU_FROM_MME:</span><br><span style="color: hsl(120, 100%, 40%);">+ perform_lu(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Figure 4.2.2.1 From any of the three states (at the VLR) */</span><br><span style="color: hsl(120, 100%, 40%);">+static void sgs_ue_fsm_allstate(struct osmo_fsm_inst *fi, uint32_t event, void *data)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (event) {</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_DETACH_IND_FROM_MME:</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_DETACH_IND_FROM_UE:</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->imsi_detached_flag = true;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->expire_lu = VLR_SUBSCRIBER_NO_EXPIRATION;</span><br><span style="color: hsl(120, 100%, 40%);">+ /* See 5.4.3 and 5.5.3 */</span><br><span style="color: hsl(120, 100%, 40%);">+ to_null(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_RESET_FROM_MME:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* See also 3GPP TS 29.118, chapter 5.7.2.1 VLR Reset Initiation */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->conf_by_radio_contact_ind = false;</span><br><span style="color: hsl(120, 100%, 40%);">+ to_null(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_VLR_FAILURE:</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_UE_E_RX_LU_FROM_A_IU_GS:</span><br><span style="color: hsl(120, 100%, 40%);">+ to_null(fi);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(0);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static int sgs_ue_fsm_timer_cb(struct osmo_fsm_inst *fi)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct vlr_subscr *vsub = fi->priv;</span><br><span style="color: hsl(120, 100%, 40%);">+ switch (fi->T) {</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ case SGS_STATE_TS6_2:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Failed TMSI reallocation procedure, deallocate all TMSI</span><br><span style="color: hsl(120, 100%, 40%);">+ * information, but don't change the SGs association state. */</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->tmsi_new = GSM_RESERVED_TMSI;</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->tmsi = GSM_RESERVED_TMSI;</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ default:</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Unhandled timer */</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(false);</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static const struct osmo_fsm_state sgs_ue_fsm_states[] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_UE_ST_NULL] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "SGs-NULL",</span><br><span style="color: hsl(120, 100%, 40%);">+ .action = sgs_ue_fsm_null,</span><br><span style="color: hsl(120, 100%, 40%);">+ .in_event_mask = 0</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_LU_FROM_MME)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_TX_PAGING)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_PAGING_FAILURE)</span><br><span style="color: hsl(120, 100%, 40%);">+ ,</span><br><span style="color: hsl(120, 100%, 40%);">+ .out_state_mask = 0</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_NULL)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_LA_UPD_PRES)</span><br><span style="color: hsl(120, 100%, 40%);">+ ,</span><br><span style="color: hsl(120, 100%, 40%);">+ },</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_UE_ST_LA_UPD_PRES] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "SGs-LA-UPDATE-PRESENT",</span><br><span style="color: hsl(120, 100%, 40%);">+ .action = sgs_ue_fsm_lau_present,</span><br><span style="color: hsl(120, 100%, 40%);">+ .in_event_mask = 0</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_TX_LU_ACCEPT)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_TX_LU_REJECT)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_TX_PAGING)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_PAGING_FAILURE)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_ALERT_FAILURE)</span><br><span style="color: hsl(120, 100%, 40%);">+ ,</span><br><span style="color: hsl(120, 100%, 40%);">+ .out_state_mask = 0</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_NULL)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_ASSOCIATED)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_LA_UPD_PRES)</span><br><span style="color: hsl(120, 100%, 40%);">+ ,</span><br><span style="color: hsl(120, 100%, 40%);">+ },</span><br><span style="color: hsl(120, 100%, 40%);">+ [SGS_UE_ST_ASSOCIATED] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "SGs-ASSOCIATED",</span><br><span style="color: hsl(120, 100%, 40%);">+ .action = sgs_ue_fsm_associated,</span><br><span style="color: hsl(120, 100%, 40%);">+ .in_event_mask = 0</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_TX_PAGING)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_TMSI_REALLOC)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_SGSAP_UE_UNREACHABLE)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_PAGING_FAILURE)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_ALERT_FAILURE)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_E_RX_LU_FROM_MME)</span><br><span style="color: hsl(120, 100%, 40%);">+ ,</span><br><span style="color: hsl(120, 100%, 40%);">+ .out_state_mask = 0</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_NULL)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_ASSOCIATED)</span><br><span style="color: hsl(120, 100%, 40%);">+ | S(SGS_UE_ST_LA_UPD_PRES)</span><br><span style="color: hsl(120, 100%, 40%);">+ ,</span><br><span style="color: hsl(120, 100%, 40%);">+ },</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+static struct osmo_fsm sgs_ue_fsm = {</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "SGs-UE",</span><br><span style="color: hsl(120, 100%, 40%);">+ .states = sgs_ue_fsm_states,</span><br><span style="color: hsl(120, 100%, 40%);">+ .num_states = ARRAY_SIZE(sgs_ue_fsm_states),</span><br><span style="color: hsl(120, 100%, 40%);">+ .allstate_event_mask = S(SGS_UE_E_RX_RESET_FROM_MME) |</span><br><span style="color: hsl(120, 100%, 40%);">+ S(SGS_UE_E_VLR_FAILURE) | S(SGS_UE_E_RX_DETACH_IND_FROM_MME) | S(SGS_UE_E_RX_DETACH_IND_FROM_UE) |</span><br><span style="color: hsl(120, 100%, 40%);">+ S(SGS_UE_E_RX_LU_FROM_A_IU_GS),</span><br><span style="color: hsl(120, 100%, 40%);">+ .allstate_action = sgs_ue_fsm_allstate,</span><br><span style="color: hsl(120, 100%, 40%);">+ .timer_cb = sgs_ue_fsm_timer_cb,</span><br><span style="color: hsl(120, 100%, 40%);">+ .log_subsys = DSGS,</span><br><span style="color: hsl(120, 100%, 40%);">+ .event_names = sgs_ue_fsm_event_names,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Initalize/Register SGs FSM in osmo-fsm subsystem */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_init(void)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ if (osmo_fsm_find_by_name(sgs_ue_fsm.name) != &sgs_ue_fsm)</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_register(&sgs_ue_fsm);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Crate SGs FSM in struct vlr_subscr.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber for which the SGs FSM should be created. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_create(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ char interim_fsm_id[256];</span><br><span style="color: hsl(120, 100%, 40%);">+ static unsigned int fsm_id_num = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* An SGSs FSM must not be created twice! */</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(!vsub->sgs_fsm);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ snprintf(interim_fsm_id, sizeof(interim_fsm_id), "num:%u", fsm_id_num);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs_fsm = osmo_fsm_inst_alloc(&sgs_ue_fsm, vsub, vsub, LOGL_INFO, interim_fsm_id);</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(vsub->sgs_fsm);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(vsub->sgs_fsm, SGS_UE_ST_NULL, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ fsm_id_num++;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Remove SGs FSM from struct vlr_subscr.</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber from which the SGs FSM should be removed. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_remove(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ /* An SGSs FSM must exist! */</span><br><span style="color: hsl(120, 100%, 40%);">+ OSMO_ASSERT(vsub->sgs_fsm);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_state_chg(vsub->sgs_fsm, SGS_UE_ST_NULL, 0, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_term(vsub->sgs_fsm, OSMO_FSM_TERM_REGULAR, NULL);</span><br><span style="color: hsl(120, 100%, 40%);">+ vsub->sgs_fsm = NULL;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/*! Update the ID of the SGs FSM with the subscriber IMSI</span><br><span style="color: hsl(120, 100%, 40%);">+ * \param[in] vsub VLR subscriber to update. */</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_update_id(struct vlr_subscr *vsub)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ char fsm_id[256];</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (strlen(vsub->imsi) > 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ snprintf(fsm_id, sizeof(fsm_id), "imsi:%s", vsub->imsi);</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_fsm_inst_update_id(vsub->sgs_fsm, fsm_id);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span>diff --git a/src/libvlr/vlr_sgs_fsm.h b/src/libvlr/vlr_sgs_fsm.h</span><br><span>new file mode 100644</span><br><span>index 0000000..94f202b</span><br><span>--- /dev/null</span><br><span>+++ b/src/libvlr/vlr_sgs_fsm.h</span><br><span>@@ -0,0 +1,42 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+#pragma once</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+enum sgs_ue_fsm_event {</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_VLR_FAILURE,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_RESET_FROM_MME,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_DETACH_IND_FROM_MME,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_DETACH_IND_FROM_UE,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_LU_FROM_A_IU_GS,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_PAGING_FAILURE,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_ALERT_FAILURE,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_LU_FROM_MME,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_TX_LU_REJECT,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_TX_LU_ACCEPT,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_TX_PAGING,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_SGSAP_UE_UNREACHABLE,</span><br><span style="color: hsl(120, 100%, 40%);">+ SGS_UE_E_RX_TMSI_REALLOC,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_init(void);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_create(struct vlr_subscr *vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_remove(struct vlr_subscr *vsub);</span><br><span style="color: hsl(120, 100%, 40%);">+void vlr_sgs_fsm_update_id(struct vlr_subscr *vsub);</span><br><span>diff --git a/src/osmo-msc/Makefile.am b/src/osmo-msc/Makefile.am</span><br><span>index bcc4ada..abe9ad3 100644</span><br><span>--- a/src/osmo-msc/Makefile.am</span><br><span>+++ b/src/osmo-msc/Makefile.am</span><br><span>@@ -12,6 +12,7 @@</span><br><span> $(LIBOSMOVTY_CFLAGS) \</span><br><span> $(LIBOSMOCTRL_CFLAGS) \</span><br><span> $(LIBOSMOABIS_CFLAGS) \</span><br><span style="color: hsl(120, 100%, 40%);">+ $(LIBOSMONETIF_CFLAGS) \</span><br><span> $(LIBSMPP34_CFLAGS) \</span><br><span> $(LIBOSMORANAP_CFLAGS) \</span><br><span> $(LIBASN1C_CFLAGS) \</span><br><span>@@ -40,11 +41,13 @@</span><br><span> $(LIBOSMOCORE_LIBS) \</span><br><span> $(LIBOSMOCTRL_LIBS) \</span><br><span> $(LIBOSMOABIS_LIBS) \</span><br><span style="color: hsl(120, 100%, 40%);">+ $(LIBOSMONETIF_LIBS) \</span><br><span> $(LIBSMPP34_LIBS) \</span><br><span> $(LIBOSMOSIGTRAN_LIBS) \</span><br><span> $(LIBOSMOMGCPCLIENT_LIBS) \</span><br><span> $(LIBOSMOGSUPCLIENT_LIBS) \</span><br><span> -ldbi \</span><br><span style="color: hsl(120, 100%, 40%);">+ -lsctp \</span><br><span> $(NULL)</span><br><span> if BUILD_IU</span><br><span> osmo_msc_LDADD += \</span><br><span>diff --git a/src/osmo-msc/msc_main.c b/src/osmo-msc/msc_main.c</span><br><span>index 6eecf46..f29b2a8 100644</span><br><span>--- a/src/osmo-msc/msc_main.c</span><br><span>+++ b/src/osmo-msc/msc_main.c</span><br><span>@@ -61,6 +61,7 @@</span><br><span> #include <osmocom/msc/smpp.h></span><br><span> #include <osmocom/sigtran/osmo_ss7.h></span><br><span> #include <osmocom/mgcp_client/mgcp_client.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/msc/sgs_iface.h></span><br><span> </span><br><span> #ifdef BUILD_IU</span><br><span> #include <osmocom/ranap/iu_client.h></span><br><span>@@ -491,6 +492,12 @@</span><br><span> .description = "BSSAP Protocol (A Interface)",</span><br><span> .enabled = 1, .loglevel = LOGL_NOTICE,</span><br><span> },</span><br><span style="color: hsl(120, 100%, 40%);">+ [DSGS] = {</span><br><span style="color: hsl(120, 100%, 40%);">+ .name = "DSGS",</span><br><span style="color: hsl(120, 100%, 40%);">+ .description = "SGs Interface (SGsAP)",</span><br><span style="color: hsl(120, 100%, 40%);">+ .enabled = 1, .loglevel = LOGL_NOTICE,</span><br><span style="color: hsl(120, 100%, 40%);">+ },</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> </span><br><span> };</span><br><span> </span><br><span>@@ -566,6 +573,7 @@</span><br><span> if (smpp_openbsc_alloc_init(tall_msc_ctx) < 0)</span><br><span> return -1;</span><br><span> #endif</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs_iface_init(tall_msc_ctx, msc_network);</span><br><span> </span><br><span> rc = vty_read_config_file(msc_cmdline_config.config_file, NULL);</span><br><span> if (rc < 0) {</span><br><span>diff --git a/tests/msc_vlr/Makefile.am b/tests/msc_vlr/Makefile.am</span><br><span>index 8a5e719..dea63e5 100644</span><br><span>--- a/tests/msc_vlr/Makefile.am</span><br><span>+++ b/tests/msc_vlr/Makefile.am</span><br><span>@@ -57,6 +57,7 @@</span><br><span> </span><br><span> noinst_HEADERS = \</span><br><span> msc_vlr_tests.h \</span><br><span style="color: hsl(120, 100%, 40%);">+ stubs.h \</span><br><span> $(NULL)</span><br><span> </span><br><span> EXTRA_DIST = \</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_authen_reuse.c b/tests/msc_vlr/msc_vlr_test_authen_reuse.c</span><br><span>index bdbdae3..0972584 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_authen_reuse.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_authen_reuse.c</span><br><span>@@ -24,6 +24,7 @@</span><br><span> /* NOTE that further auth re-use tests exist in msc_vlr_test_hlr_reject.c */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void _test_auth_reuse(enum osmo_rat_type via_ran,</span><br><span> int set_max_reuse_count,</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_call.c b/tests/msc_vlr/msc_vlr_test_call.c</span><br><span>index b5f6b6c..29639b5 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_call.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_call.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> #include <osmocom/msc/gsm_04_08.h></span><br><span> </span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_gsm_authen.c b/tests/msc_vlr/msc_vlr_test_gsm_authen.c</span><br><span>index f6f1ab6..8dca655 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_gsm_authen.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_gsm_authen.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void test_gsm_authen()</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_gsm_ciph.c b/tests/msc_vlr/msc_vlr_test_gsm_ciph.c</span><br><span>index 31b5f5d..19092e2 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_gsm_ciph.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_gsm_ciph.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void test_ciph()</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_hlr_reject.c b/tests/msc_vlr/msc_vlr_test_hlr_reject.c</span><br><span>index 13bed42..c613ff9 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_hlr_reject.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_hlr_reject.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void test_hlr_rej_auth_info_unknown_imsi()</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_hlr_timeout.c b/tests/msc_vlr/msc_vlr_test_hlr_timeout.c</span><br><span>index b23a7a7..bb7ef19 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_hlr_timeout.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_hlr_timeout.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> #include <osmocom/core/logging.h></span><br><span> </span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_ms_timeout.c b/tests/msc_vlr/msc_vlr_test_ms_timeout.c</span><br><span>index 3702a0c..9eae850 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_ms_timeout.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_ms_timeout.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void test_ms_timeout_lu_auth_resp()</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_no_authen.c b/tests/msc_vlr/msc_vlr_test_no_authen.c</span><br><span>index d52d3d6..df23011 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_no_authen.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_no_authen.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void test_no_authen()</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_reject_concurrency.c b/tests/msc_vlr/msc_vlr_test_reject_concurrency.c</span><br><span>index 66d2e39..ec7117b 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_reject_concurrency.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_reject_concurrency.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void test_reject_2nd_conn()</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_rest.c b/tests/msc_vlr/msc_vlr_test_rest.c</span><br><span>index 4587383..7c17a83 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_rest.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_rest.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void test_early_stage()</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_ss.c b/tests/msc_vlr/msc_vlr_test_ss.c</span><br><span>index 0390196..b264d07 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_ss.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_ss.c</span><br><span>@@ -21,6 +21,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> #define IMSI "901700000004620"</span><br><span> </span><br><span>diff --git a/tests/msc_vlr/msc_vlr_test_umts_authen.c b/tests/msc_vlr/msc_vlr_test_umts_authen.c</span><br><span>index beeea22..8528b98 100644</span><br><span>--- a/tests/msc_vlr/msc_vlr_test_umts_authen.c</span><br><span>+++ b/tests/msc_vlr/msc_vlr_test_umts_authen.c</span><br><span>@@ -22,6 +22,7 @@</span><br><span> */</span><br><span> </span><br><span> #include "msc_vlr_tests.h"</span><br><span style="color: hsl(120, 100%, 40%);">+#include "stubs.h"</span><br><span> </span><br><span> static void _test_umts_authen(enum osmo_rat_type via_ran)</span><br><span> {</span><br><span>diff --git a/tests/msc_vlr/stubs.h b/tests/msc_vlr/stubs.h</span><br><span>new file mode 100644</span><br><span>index 0000000..bf55baa</span><br><span>--- /dev/null</span><br><span>+++ b/tests/msc_vlr/stubs.h</span><br><span>@@ -0,0 +1,40 @@</span><br><span style="color: hsl(120, 100%, 40%);">+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH</span><br><span style="color: hsl(120, 100%, 40%);">+ * All Rights Reserved</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * Author: Harald Welte, Philipp Maier</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is free software; you can redistribute it and/or modify</span><br><span style="color: hsl(120, 100%, 40%);">+ * it under the terms of the GNU Affero General Public License as published by</span><br><span style="color: hsl(120, 100%, 40%);">+ * the Free Software Foundation; either version 3 of the License, or</span><br><span style="color: hsl(120, 100%, 40%);">+ * (at your option) any later version.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * This program is distributed in the hope that it will be useful,</span><br><span style="color: hsl(120, 100%, 40%);">+ * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><br><span style="color: hsl(120, 100%, 40%);">+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><br><span style="color: hsl(120, 100%, 40%);">+ * GNU Affero General Public License for more details.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * You should have received a copy of the GNU Affero General Public License</span><br><span style="color: hsl(120, 100%, 40%);">+ * along with this program. If not, see <http://www.gnu.org/licenses/>.</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_data(struct osmo_stream_srv_link *link, void *data) {}</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_fd *osmo_stream_srv_get_ofd(struct osmo_stream_srv *srv) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_destroy(struct osmo_stream_srv *conn) {}</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_stream_srv *osmo_stream_srv_create(void *ctx, struct osmo_stream_srv_link *link,</span><br><span style="color: hsl(120, 100%, 40%);">+ int fd, int (*cb)(struct osmo_stream_srv *conn),</span><br><span style="color: hsl(120, 100%, 40%);">+ int (*closed_cb)(struct osmo_stream_srv *conn),</span><br><span style="color: hsl(120, 100%, 40%);">+ void *data) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_send(struct osmo_stream_srv *conn, struct msgb *msg) {}</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_proto(struct osmo_stream_srv_link *link, uint16_t proto) {}</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_fd *osmo_stream_srv_link_get_ofd(struct osmo_stream_srv_link *link) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_stream_srv_link *osmo_stream_srv_link_create(void *ctx) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void *osmo_stream_srv_get_data(struct osmo_stream_srv *conn) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_nodelay(struct osmo_stream_srv_link *link, bool nodelay) {}</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_accept_cb(struct osmo_stream_srv_link *link, int (*accept_cb)</span><br><span style="color: hsl(120, 100%, 40%);">+ (struct osmo_stream_srv_link *link, int fd)) {}</span><br><span style="color: hsl(120, 100%, 40%);">+int osmo_stream_srv_link_open(struct osmo_stream_srv_link *link) { return 0; }</span><br><span style="color: hsl(120, 100%, 40%);">+void *osmo_stream_srv_link_get_data(struct osmo_stream_srv_link *link) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_port(struct osmo_stream_srv_link *link, uint16_t port) {}</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_addr(struct osmo_stream_srv_link *link, const char *addr) {}</span><br><span style="color: hsl(120, 100%, 40%);">+int sctp_recvmsg(int sd, void *msg, size_t len, void *from, void *fromlen, void *info, int *msg_flags) { return 0; }</span><br><span>diff --git a/tests/sms_queue/sms_queue_test.c b/tests/sms_queue/sms_queue_test.c</span><br><span>index 68819b9..e426377 100644</span><br><span>--- a/tests/sms_queue/sms_queue_test.c</span><br><span>+++ b/tests/sms_queue/sms_queue_test.c</span><br><span>@@ -237,3 +237,24 @@</span><br><span> </span><br><span> return 0;</span><br><span> }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_data(struct osmo_stream_srv_link *link, void *data) {}</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_fd *osmo_stream_srv_get_ofd(struct osmo_stream_srv *srv) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_destroy(struct osmo_stream_srv *conn) {}</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_stream_srv *osmo_stream_srv_create(void *ctx, struct osmo_stream_srv_link *link,</span><br><span style="color: hsl(120, 100%, 40%);">+ int fd, int (*cb)(struct osmo_stream_srv *conn),</span><br><span style="color: hsl(120, 100%, 40%);">+ int (*closed_cb)(struct osmo_stream_srv *conn),</span><br><span style="color: hsl(120, 100%, 40%);">+ void *data) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_send(struct osmo_stream_srv *conn, struct msgb *msg) {}</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_proto(struct osmo_stream_srv_link *link, uint16_t proto) {}</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_fd *osmo_stream_srv_link_get_ofd(struct osmo_stream_srv_link *link) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+struct osmo_stream_srv_link *osmo_stream_srv_link_create(void *ctx) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void *osmo_stream_srv_get_data(struct osmo_stream_srv *conn) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_nodelay(struct osmo_stream_srv_link *link, bool nodelay) {}</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_accept_cb(struct osmo_stream_srv_link *link, int (*accept_cb)</span><br><span style="color: hsl(120, 100%, 40%);">+ (struct osmo_stream_srv_link *link, int fd)) {}</span><br><span style="color: hsl(120, 100%, 40%);">+int osmo_stream_srv_link_open(struct osmo_stream_srv_link *link) { return 0; }</span><br><span style="color: hsl(120, 100%, 40%);">+void *osmo_stream_srv_link_get_data(struct osmo_stream_srv_link *link) { return NULL; }</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_port(struct osmo_stream_srv_link *link, uint16_t port) {}</span><br><span style="color: hsl(120, 100%, 40%);">+void osmo_stream_srv_link_set_addr(struct osmo_stream_srv_link *link, const char *addr) {}</span><br><span style="color: hsl(120, 100%, 40%);">+int sctp_recvmsg(int sd, void *msg, size_t len, void *from, void *fromlen, void *info, int *msg_flags) { return 0; }</span><br><span>diff --git a/tests/test_nodes.vty b/tests/test_nodes.vty</span><br><span>index c62c692..f2312d1 100644</span><br><span>--- a/tests/test_nodes.vty</span><br><span>+++ b/tests/test_nodes.vty</span><br><span>@@ -4,6 +4,7 @@</span><br><span> ...</span><br><span> network</span><br><span> msc</span><br><span style="color: hsl(120, 100%, 40%);">+ sgs</span><br><span> mncc-int</span><br><span> hlr</span><br><span> ...</span><br><span>@@ -92,6 +93,18 @@</span><br><span> OsmoMSC# configure terminal</span><br><span> OsmoMSC(config)# network</span><br><span> OsmoMSC(config-net)# end</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+OsmoMSC# configure terminal</span><br><span style="color: hsl(120, 100%, 40%);">+OsmoMSC(config)# sgs</span><br><span style="color: hsl(120, 100%, 40%);">+OsmoMSC(config-sgs)# list</span><br><span style="color: hsl(120, 100%, 40%);">+...</span><br><span style="color: hsl(120, 100%, 40%);">+ local-ip A.B.C.D</span><br><span style="color: hsl(120, 100%, 40%);">+ local-port <0-65535></span><br><span style="color: hsl(120, 100%, 40%);">+ timer (ts5|ts6-2|ts7|ts11|ts14|ts15) <1-120></span><br><span style="color: hsl(120, 100%, 40%);">+ counter (ns7|ns11) <0-255></span><br><span style="color: hsl(120, 100%, 40%);">+ vlr-name FQDN</span><br><span style="color: hsl(120, 100%, 40%);">+OsmoMSC(config-sgs)# end</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> OsmoMSC# disable</span><br><span> OsmoMSC> enable</span><br><span> </span><br><span>@@ -125,4 +138,7 @@</span><br><span> hlr</span><br><span> remote-ip 127.0.0.1</span><br><span> remote-port 4222</span><br><span style="color: hsl(120, 100%, 40%);">+sgs</span><br><span style="color: hsl(120, 100%, 40%);">+ local-ip 0.0.0.0</span><br><span style="color: hsl(120, 100%, 40%);">+ vlr-name vlr.example.net</span><br><span> end</span><br><span></span><br></pre><p>To view, visit <a href="https://gerrit.osmocom.org/11642">change 11642</a>. To unsubscribe, or for help writing mail filters, visit <a href="https://gerrit.osmocom.org/settings">settings</a>.</p><div itemscope itemtype="http://schema.org/EmailMessage"><div itemscope itemprop="action" itemtype="http://schema.org/ViewAction"><link itemprop="url" href="https://gerrit.osmocom.org/11642"/><meta itemprop="name" content="View Change"/></div></div>
<div style="display:none"> Gerrit-Project: osmo-msc </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-MessageType: merged </div>
<div style="display:none"> Gerrit-Change-Id: I73359925fc1ca72b33a1466e6ac41307f2f0b11d </div>
<div style="display:none"> Gerrit-Change-Number: 11642 </div>
<div style="display:none"> Gerrit-PatchSet: 36 </div>
<div style="display:none"> Gerrit-Owner: dexter <pmaier@sysmocom.de> </div>
<div style="display:none"> Gerrit-Assignee: Neels Hofmeyr <nhofmeyr@sysmocom.de> </div>
<div style="display:none"> Gerrit-Reviewer: Harald Welte <laforge@gnumonks.org> </div>
<div style="display:none"> Gerrit-Reviewer: Jenkins Builder (1000002) </div>
<div style="display:none"> Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr@sysmocom.de> </div>
<div style="display:none"> Gerrit-Reviewer: Vadim Yanitskiy <axilirator@gmail.com> </div>
<div style="display:none"> Gerrit-Reviewer: dexter <pmaier@sysmocom.de> </div>
<div style="display:none"> Gerrit-CC: Stefan Sperling <stsp@stsp.name> </div>