osmith has uploaded this change for review.
Add subscr_conn_fsm
Insert the BSCNAT's MGW into phone calls by replacing the AoIP
transport layer address IE inside BSSMAP Assignment Request and
Assignment Confirm. Accomplish this with a new subscr_conn_fsm that
parses and stores the original ass_req / ass_conf messages, communicates
with the BSCNAT MGW, and then creates new ass_req / ass_conf messages
based on the original ones but with new RTP information.
With this patch it is possible to do a successful voice call with the
following network:
MS1 --- BTS1 --- BSC1 --.
| | BSCNAT ----------- MSC
| | | | |
'-- MGW-BSC1 --|-- MGW-BSCNAT --- MGW-MSC
| |
MS2 --- BTS2 --- BSC2 --' |
| | |
'-- MGW-BSC2 ------'
Related: SYS#5560
Related: https://osmocom.org/projects/osmo-bscnat/wiki/Ladder_diagrams_for_key_procedures
Change-Id: I7e491aada6f5db0eb35ef2039869c6ba07f9ca3b
---
M include/osmocom/bsc_nat/Makefile.am
M include/osmocom/bsc_nat/bsc_nat.h
M include/osmocom/bsc_nat/bssap.h
M include/osmocom/bsc_nat/subscr_conn.h
A include/osmocom/bsc_nat/subscr_conn_fsm.h
M src/osmo-bsc-nat/Makefile.am
M src/osmo-bsc-nat/bssap_conn.c
M src/osmo-bsc-nat/subscr_conn.c
A src/osmo-bsc-nat/subscr_conn_fsm.c
9 files changed, 824 insertions(+), 1 deletion(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-bsc-nat refs/changes/12/27712/1
diff --git a/include/osmocom/bsc_nat/Makefile.am b/include/osmocom/bsc_nat/Makefile.am
index 81dacad..ebf3b0b 100644
--- a/include/osmocom/bsc_nat/Makefile.am
+++ b/include/osmocom/bsc_nat/Makefile.am
@@ -6,5 +6,6 @@
logging.h \
msc.h \
subscr_conn.h \
+ subscr_conn_fsm.h \
vty.h \
$(NULL)
diff --git a/include/osmocom/bsc_nat/bsc_nat.h b/include/osmocom/bsc_nat/bsc_nat.h
index 032386a..fd2c3fb 100644
--- a/include/osmocom/bsc_nat/bsc_nat.h
+++ b/include/osmocom/bsc_nat/bsc_nat.h
@@ -44,6 +44,7 @@
struct {
struct mgcp_client_pool *pool;
struct osmo_tdef *tdefs;
+ uint32_t call_id_next;
} mgw;
struct {
diff --git a/include/osmocom/bsc_nat/bssap.h b/include/osmocom/bsc_nat/bssap.h
index 3fecc7d..5c11fc5 100644
--- a/include/osmocom/bsc_nat/bssap.h
+++ b/include/osmocom/bsc_nat/bssap.h
@@ -20,8 +20,46 @@
#pragma once
#include <osmocom/core/msgb.h>
+#include <osmocom/core/sockaddr_str.h>
+#include <osmocom/gsm/gsm0808_utils.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
#include <osmocom/bsc_nat/bsc_nat.h>
+/* Parsed BSSMAP messages, to be stored inside struct subscr_conn until
+ * forwarded with slight modification */
+struct bssmap_assignment_rqst {
+ struct gsm0808_channel_type ct;
+
+ struct osmo_sockaddr_str aoip_transp_addr;
+
+ struct gsm0808_speech_codec_list scl;
+
+ uint32_t ci;
+ bool ci_present;
+
+ uint8_t kc;
+ bool kc_present;
+
+ struct osmo_lcls lcls;
+ bool lcls_present;
+};
+
+struct bssmap_assignment_complete {
+ uint8_t rr_cause;
+ uint8_t chosen_channel;
+ uint8_t chosen_encr_alg;
+ uint8_t speech_version;
+
+ struct osmo_sockaddr_str aoip_transp_addr;
+
+ struct gsm0808_speech_codec sc;
+ struct gsm0808_speech_codec_list scl;
+ bool scl_present;
+
+ enum gsm0808_lcls_status lcls_bss_status;
+ bool lcls_bss_status_present;
+};
+
/* connection-less */
int bssap_handle_udt(struct bsc_nat_sccp_inst *sccp_inst, struct osmo_sccp_addr *addr, struct msgb *msgb,
unsigned int length);
@@ -32,3 +70,9 @@
struct subscr_conn;
int bssap_handle_dt(enum bsc_nat_net net, struct subscr_conn *subscr_conn, struct msgb *msgb, unsigned int length);
+
+#define bssmap_tx_assignment_failure_cn(subscr_conn, cause) \
+ bssmap_tx_assignment_failure(BSC_NAT_NET_CN, subscr_conn, cause)
+#define bssmap_tx_assignment_failure_ran(subscr_conn, cause) \
+ bssmap_tx_assignment_failure(BSC_NAT_NET_RAN, subscr_conn, cause)
+int bssmap_tx_assignment_failure(enum bsc_nat_net net, struct subscr_conn *subscr_conn, enum gsm0808_cause cause);
diff --git a/include/osmocom/bsc_nat/subscr_conn.h b/include/osmocom/bsc_nat/subscr_conn.h
index 7a0dc44..aad207c 100644
--- a/include/osmocom/bsc_nat/subscr_conn.h
+++ b/include/osmocom/bsc_nat/subscr_conn.h
@@ -20,25 +20,35 @@
#pragma once
#include <osmocom/bsc_nat/bsc_nat.h>
+#include <osmocom/bsc_nat/bssap.h>
enum subscr_conn_id_type {
SUBSCR_CONN_ID_TYPE_CONN_ID_CN = 0,
SUBSCR_CONN_ID_TYPE_CONN_ID_RAN,
- /* SUBSCR_CONN_ID_TYPE_CALL_ID_MGW will be added in future patch */
+ SUBSCR_CONN_ID_TYPE_CALL_ID_MGW,
};
/* connection for one subscriber */
struct subscr_conn {
struct llist_head list;
+ struct osmo_fsm_inst *fi;
+ struct osmo_mgcpc_ep *ep;
+ uint32_t mgw_call_id;
struct {
uint32_t id;
+ struct osmo_mgcpc_ep_ci *ci;
struct msc *msc;
+
+ struct bssmap_assignment_rqst ass_req;
} cn;
struct {
uint32_t id;
+ struct osmo_mgcpc_ep_ci *ci;
struct bsc *bsc;
+
+ struct bssmap_assignment_complete ass_compl;
} ran;
};
diff --git a/include/osmocom/bsc_nat/subscr_conn_fsm.h b/include/osmocom/bsc_nat/subscr_conn_fsm.h
new file mode 100644
index 0000000..f0c903b
--- /dev/null
+++ b/include/osmocom/bsc_nat/subscr_conn_fsm.h
@@ -0,0 +1,31 @@
+/* (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ * Author: Oliver Smith <osmith@sysmocom.de>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/lienses/>.
+ *
+ */
+
+#pragma once
+
+enum subscr_conn_fsm_events {
+ SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_REQUEST,
+ SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_COMPLETE,
+ SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_FAILURE,
+ SUBSCR_CONN_FSM_EV_BSSMAP_CLEAR_COMMAND,
+ SUBSCR_CONN_FSM_EV_MGCP_EP_OK,
+ SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL,
+ SUBSCR_CONN_FSM_EV_MGCP_EP_TERM,
+};
+
diff --git a/src/osmo-bsc-nat/Makefile.am b/src/osmo-bsc-nat/Makefile.am
index e3f7305..f632a7d 100644
--- a/src/osmo-bsc-nat/Makefile.am
+++ b/src/osmo-bsc-nat/Makefile.am
@@ -36,6 +36,7 @@
msc.c \
msc_fsm.c \
subscr_conn.c \
+ subscr_conn_fsm.c \
vty.c \
$(NULL)
diff --git a/src/osmo-bsc-nat/bssap_conn.c b/src/osmo-bsc-nat/bssap_conn.c
index 659fb73..bd1302a 100644
--- a/src/osmo-bsc-nat/bssap_conn.c
+++ b/src/osmo-bsc-nat/bssap_conn.c
@@ -23,6 +23,30 @@
#include <osmocom/sigtran/sccp_helpers.h>
#include <osmocom/bsc_nat/logging.h>
#include <osmocom/bsc_nat/subscr_conn.h>
+#include <osmocom/bsc_nat/subscr_conn_fsm.h>
+
+int bssmap_tx_assignment_failure(enum bsc_nat_net net, struct subscr_conn *subscr_conn, enum gsm0808_cause cause)
+{
+ struct bsc_nat_sccp_inst *sccp_inst;
+ uint32_t id;
+ struct msgb *msg;
+
+ LOGP(DMAIN, LOGL_ERROR, "Tx BSSMAP assignment failure %s to %s via %s\n",
+ gsm0808_cause_name(cause),
+ net == BSC_NAT_NET_CN ? "CN" : "RAN",
+ talloc_get_name(subscr_conn));
+
+ if (net == BSC_NAT_NET_CN) {
+ sccp_inst = g_bsc_nat->cn.sccp_inst;
+ id = subscr_conn->cn.id;
+ } else {
+ sccp_inst = g_bsc_nat->ran.sccp_inst;
+ id = subscr_conn->ran.id;
+ }
+
+ msg = gsm0808_create_ass_fail(cause, NULL, NULL);
+ return osmo_sccp_tx_data_msg(sccp_inst->scu, id, msg);
+}
static int bssap_fwd_to_cn(struct subscr_conn *subscr_conn, struct msgb *msg, unsigned int length)
{
@@ -42,11 +66,248 @@
return osmo_sccp_tx_data(g_bsc_nat->ran.sccp_inst->scu, subscr_conn->ran.id, msg->data, msgb_length(msg));
}
+static int bssmap_cn_handle_assignment_rqst(struct subscr_conn *subscr_conn, struct msgb *msg, unsigned int length)
+{
+ struct bssmap_assignment_rqst ass_req = {};
+ struct tlv_parsed tp;
+ struct sockaddr_storage ss;
+ struct tlv_p_entry *e;
+
+ tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 1, length - 1, 0, 0);
+
+ /* Get channel type */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_CHANNEL_TYPE))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: channel type\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (gsm0808_dec_channel_type(&ass_req.ct, e->val, e->len) <= 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: channel type\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+
+ /* Not speech: fwd directly */
+ if ((ass_req.ct.ch_indctr & 0x0f) != GSM0808_CHAN_SPEECH) {
+ LOGP(DMAIN, LOGL_DEBUG, "Channel type is not speech, forwarding without modification\n");
+ if (bssap_fwd_to_ran(subscr_conn, msg, length) < 0) {
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ return -1;
+ }
+ return 0;
+ }
+
+ /* Get AoIP transport layer address */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_AOIP_TRASP_ADDR))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: AoIP transport layer address\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (gsm0808_dec_aoip_trasp_addr(&ss, e->val, e->len) <= 0
+ || osmo_sockaddr_str_from_sockaddr(&ass_req.aoip_transp_addr, &ss) < 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: AoIP transport layer address\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+
+ /* Get speech codec list */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_SPEECH_CODEC_LIST))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: speech codec list\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (gsm0808_dec_speech_codec_list(&ass_req.scl, e->val, e->len) <= 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: speech codec list\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+
+ /* Get call ID */
+ if ((e = TLVP_GET(&tp, GSM0808_IE_CALL_ID))) {
+ if (e->len != 4) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: call ID (len %u instead of 4)\n", e->len);
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ memcpy(&ass_req.ci, e->val, 32);
+ ass_req.ci_present = true;
+ }
+
+ /* Get Kc */
+ if ((e = TLVP_GET(&tp, GSM0808_IE_KC_128))) {
+ if (e->len != 16) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: Kc128 (len %u instead of 16)\n", e->len);
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ memcpy(&ass_req.kc, e->val, 16);
+ ass_req.kc_present = true;
+ }
+
+ /* Get LCLS */
+ if (TLVP_PRESENT(&tp, GSM0808_IE_GLOBAL_CALL_REF)) {
+ if (gsm0808_dec_lcls(&ass_req.lcls, &tp) < 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IEs for LCLS\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ ass_req.lcls_present = true;
+ }
+
+ /* Don't forward the message directly. Instead, let the subscr_conn FSM
+ * allocate new MGCP connections in the BSCNAT's MGW and then send a
+ * similar assignment request, but with the RTP address replaced. */
+ if (osmo_fsm_inst_dispatch(subscr_conn->fi, SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_REQUEST, &ass_req) < 0) {
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ return -1;
+ }
+
+ return 0;
+}
+
+static void bssmap_ran_error_assignment_complete(struct subscr_conn *subscr_conn, enum gsm0808_cause cause_ran)
+{
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ bssmap_tx_assignment_failure_ran(subscr_conn, cause_ran);
+
+ /* For the FSM, treat this the same as if the BSC had responded with
+ * assignment failure. */
+ osmo_fsm_inst_dispatch(subscr_conn->fi, SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_FAILURE, NULL);
+}
+
+static int bssmap_ran_handle_assignment_complete(struct subscr_conn *subscr_conn, struct msgb *msg, unsigned int length)
+{
+ struct bssmap_assignment_complete ass_compl = {};
+ struct tlv_parsed tp;
+ struct sockaddr_storage ss;
+ struct tlv_p_entry *e;
+
+ tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 1, length - 1, 0, 0);
+
+ /* Get RR cause */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_RR_CAUSE))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: RR cause\n");
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (e->len != 1) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: RR cause (len %u instead of 1)\n", e->len);
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ ass_compl.rr_cause = e->val[0];
+
+ /* Get chosen channel */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_CHOSEN_CHANNEL))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: chosen channel\n");
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (e->len != 1) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: chosen channel (len %u instead of 1)\n", e->len);
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ ass_compl.chosen_channel = e->val[0];
+
+ /* Get chosen encr alg */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_CHOSEN_ENCR_ALG))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: chosen encr alg\n");
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (e->len != 1) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: chosen encr alg (len %u instead of 1)\n", e->len);
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ ass_compl.chosen_encr_alg = e->val[0];
+
+ /* Get speech version */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_SPEECH_VERSION))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: speech version\n");
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (e->len != 1) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: speech version (len %u instead of 1)\n", e->len);
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ ass_compl.speech_version = e->val[0];
+
+ /* Get AoIP transport layer address */
+ if (!(e = TLVP_GET(&tp, GSM0808_IE_AOIP_TRASP_ADDR))) {
+ LOGP(DMAIN, LOGL_ERROR, "Missing IE: AoIP transport layer address\n");
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING);
+ return -1;
+ }
+ if (gsm0808_dec_aoip_trasp_addr(&ss, e->val, e->len) <= 0
+ || osmo_sockaddr_str_from_sockaddr(&ass_compl.aoip_transp_addr, &ss) < 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: AoIP transport layer address\n");
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+
+ /* Get speech codec list */
+ if ((e = TLVP_GET(&tp, GSM0808_IE_SPEECH_CODEC_LIST))) {
+ if (gsm0808_dec_speech_codec_list(&ass_compl.scl, e->val, e->len) <= 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: speech codec list\n");
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ ass_compl.scl_present = true;
+ }
+
+ /* Get LCLS */
+ if ((e = TLVP_GET(&tp, GSM0808_IE_LCLS_BSS_STATUS))) {
+ if (e->len != 1) {
+ LOGP(DMAIN, LOGL_ERROR, "Invalid IE: LCLS BSS status (len %u instead of 1)\n", e->len);
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_INCORRECT_VALUE);
+ return -1;
+ }
+ ass_compl.lcls_bss_status = e->val[0];
+ ass_compl.lcls_bss_status_present = true;
+ }
+
+ /* Don't forward the message directly. Instead, let the subscr_conn FSM
+ * use the RTP info to MDCX the BSC-side connection in the BSCNAT's MGW
+ * and then send a similar assignment complete to the MSC, but with the
+ * RTP address replaced. */
+ if (osmo_fsm_inst_dispatch(subscr_conn->fi, SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_COMPLETE, &ass_compl) < 0) {
+ bssmap_ran_error_assignment_complete(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int bssmap_ran_handle_assignment_failure(struct subscr_conn *subscr_conn, struct msgb *msg, unsigned int length)
+{
+ osmo_fsm_inst_dispatch(subscr_conn->fi, SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_FAILURE, NULL);
+ bssap_fwd_to_ran(subscr_conn, msg, length);
+ return 0;
+}
+
+static int bssmap_cn_handle_clear_cmd(struct subscr_conn *subscr_conn, struct msgb *msg, unsigned int length)
+{
+ osmo_fsm_inst_dispatch(subscr_conn->fi, SUBSCR_CONN_FSM_EV_BSSMAP_CLEAR_COMMAND, NULL);
+ bssap_fwd_to_ran(subscr_conn, msg, length);
+ return 0;
+}
+
+
static int bssmap_cn_rcvmsg_dt(struct subscr_conn *subscr_conn, struct msgb *msg, unsigned int length)
{
int ret = 0;
switch (msg->l3h[0]) {
+ case BSS_MAP_MSG_ASSIGNMENT_RQST:
+ ret = bssmap_cn_handle_assignment_rqst(subscr_conn, msg, length);
+ break;
+ case BSS_MAP_MSG_CLEAR_CMD:
+ ret = bssmap_cn_handle_clear_cmd(subscr_conn, msg, length);
+ break;
default:
ret = bssap_fwd_to_ran(subscr_conn, msg, length);
break;
@@ -60,6 +321,12 @@
int ret = 0;
switch (msg->l3h[0]) {
+ case BSS_MAP_MSG_ASSIGNMENT_COMPLETE:
+ ret = bssmap_ran_handle_assignment_complete(subscr_conn, msg, length);
+ break;
+ case BSS_MAP_MSG_ASSIGNMENT_FAILURE:
+ ret = bssmap_ran_handle_assignment_failure(subscr_conn, msg, length);
+ break;
default:
ret = bssap_fwd_to_cn(subscr_conn, msg, length);
break;
diff --git a/src/osmo-bsc-nat/subscr_conn.c b/src/osmo-bsc-nat/subscr_conn.c
index 5a918ba..541dfc3 100644
--- a/src/osmo-bsc-nat/subscr_conn.c
+++ b/src/osmo-bsc-nat/subscr_conn.c
@@ -26,6 +26,8 @@
#include <osmocom/bsc_nat/subscr_conn.h>
#include <osmocom/bsc_nat/logging.h>
+extern struct osmo_fsm subscr_conn_fsm;
+
/* Get the next available id in either CN or RAN. */
int subscr_conn_get_next_id(enum subscr_conn_id_type id_type)
{
@@ -38,6 +40,9 @@
case SUBSCR_CONN_ID_TYPE_CONN_ID_RAN:
id = &g_bsc_nat->ran.subscr_conn_id_next;
break;
+ case SUBSCR_CONN_ID_TYPE_CALL_ID_MGW:
+ id = &g_bsc_nat->mgw.call_id_next;
+ break;
default:
OSMO_ASSERT(false);
}
@@ -58,6 +63,9 @@
case SUBSCR_CONN_ID_TYPE_CONN_ID_RAN:
subscr_id = subscr_conn->ran.id;
break;
+ case SUBSCR_CONN_ID_TYPE_CALL_ID_MGW:
+ subscr_id = subscr_conn->mgw_call_id;
+ break;
default:
OSMO_ASSERT(false);
}
@@ -84,6 +92,9 @@
LOGP(DMAIN, LOGL_DEBUG, "Add %s\n", talloc_get_name(subscr_conn));
+ subscr_conn->fi = osmo_fsm_inst_alloc(&subscr_conn_fsm, subscr_conn, subscr_conn, LOGL_INFO, NULL);
+ OSMO_ASSERT(subscr_conn->fi);
+
subscr_conn->cn.id = id_cn;
subscr_conn->cn.msc = msc;
subscr_conn->ran.id = id_ran;
@@ -112,5 +123,6 @@
{
LOGP(DMAIN, LOGL_DEBUG, "Del %s\n", talloc_get_name(subscr_conn));
llist_del(&subscr_conn->list);
+ osmo_fsm_inst_free(subscr_conn->fi);
talloc_free(subscr_conn);
}
diff --git a/src/osmo-bsc-nat/subscr_conn_fsm.c b/src/osmo-bsc-nat/subscr_conn_fsm.c
new file mode 100644
index 0000000..b372379
--- /dev/null
+++ b/src/osmo-bsc-nat/subscr_conn_fsm.c
@@ -0,0 +1,456 @@
+/* (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ * Author: Oliver Smith <osmith@sysmocom.de>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/lienses/>.
+ *
+ */
+
+#include "config.h"
+#include <inttypes.h>
+#include <osmocom/core/fsm.h>
+#include <osmocom/gsm/gsm0808.h>
+#include <osmocom/mgcp_client/mgcp_client_endpoint_fsm.h>
+#include <osmocom/mgcp_client/mgcp_client_fsm.h>
+#include <osmocom/sigtran/sccp_helpers.h>
+#include <osmocom/bsc_nat/bsc_nat.h>
+#include <osmocom/bsc_nat/bssap.h>
+#include <osmocom/bsc_nat/logging.h>
+#include <osmocom/bsc_nat/subscr_conn.h>
+#include <osmocom/bsc_nat/subscr_conn_fsm.h>
+
+#define X(s) (1 << (s))
+#define TIMEOUT_MGW 10
+#define TIMEOUT_BSC 20
+
+enum subscr_conn_fsm_states {
+ SUBSCR_CONN_FSM_ST_IDLE,
+ SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_CN,
+ SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_MDCX_CN,
+ SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_RAN,
+ SUBSCR_CONN_FSM_ST_WAITING_FOR_ASSIGNMENT_COMPLETE,
+ SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_COMPLETE_MDCX_RAN,
+ SUBSCR_CONN_FSM_ST_WAITING_FOR_CLEAR_COMMAND,
+};
+
+static void st_idle_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+ if (!subscr_conn->ep)
+ return;
+
+ osmo_mgcpc_ep_clear(subscr_conn->ep);
+
+ subscr_conn->ep = NULL;
+ subscr_conn->ran.ci = NULL;
+ subscr_conn->cn.ci = NULL;
+}
+
+static void st_idle(struct osmo_fsm_inst *fi, uint32_t event, void *data)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+
+ switch (event) {
+ case SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_REQUEST:
+ subscr_conn->cn.ass_req = *(struct bssmap_assignment_rqst *)data;
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_CN, TIMEOUT_MGW, 0);
+ break;
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_TERM:
+ /* This event is expected, as we terminate the MGCP EP in
+ * st_idle_on_enter(). Nothing to do here. */
+ case SUBSCR_CONN_FSM_EV_BSSMAP_CLEAR_COMMAND:
+ /* Clear commands sent to this FSM in idle state are not
+ * relevant, so ignore them here. bssmap_ran_handle_clear_cmd()
+ * forwards them from RAN to CN. */
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
+}
+
+static void st_processing_assignment_request_crcx_cn_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_stat)
+{
+ struct mgcp_client *mgcp_client;
+ struct mgcp_conn_peer crcx_info = {};
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+
+ /* MGCP EP */
+ mgcp_client = mgcp_client_pool_get(g_bsc_nat->mgw.pool);
+ OSMO_ASSERT(mgcp_client);
+ subscr_conn->ep = osmo_mgcpc_ep_alloc(subscr_conn->fi, SUBSCR_CONN_FSM_EV_MGCP_EP_TERM, mgcp_client,
+ g_bsc_nat->mgw.tdefs, "SUBSCR-CONN-EP",
+ mgcp_client_rtpbridge_wildcard(mgcp_client));
+
+ subscr_conn->mgw_call_id = subscr_conn_get_next_id(SUBSCR_CONN_ID_TYPE_CALL_ID_MGW);
+ crcx_info.call_id = subscr_conn->mgw_call_id;
+
+ LOGPFSML(fi, LOGL_DEBUG, "Set MGW call_id=%" PRIu32 " for %s\n", subscr_conn->mgw_call_id,
+ talloc_get_name(subscr_conn));
+
+ /* MGCP CRCX CN */
+ subscr_conn->cn.ci = osmo_mgcpc_ep_ci_add(subscr_conn->ep, "CI-%"PRIu32"-CN", crcx_info.call_id);
+ osmo_mgcpc_ep_ci_request(subscr_conn->cn.ci, MGCP_VERB_CRCX, &crcx_info, subscr_conn->fi,
+ SUBSCR_CONN_FSM_EV_MGCP_EP_OK, SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL, NULL);
+}
+
+static void st_processing_assignment_request_crcx_cn(struct osmo_fsm_inst *fi, uint32_t event, void *data)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+
+ switch (event) {
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_OK:
+ LOGPFSML(fi, LOGL_DEBUG, "Rx MGCP OK\n");
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_MDCX_CN, TIMEOUT_MGW, 0);
+ break;
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL:
+ LOGPFSML(fi, LOGL_ERROR, "MGCP failure, aborting assignment request processing\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
+}
+
+static void st_processing_assignment_request_mdcx_cn_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_stat)
+{
+ struct mgcp_conn_peer mdcx_info = {};
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+ struct bssmap_assignment_rqst *ass_req = &subscr_conn->cn.ass_req;
+
+ /* Set RTP addr + port */
+ osmo_static_assert(sizeof(mdcx_info.addr) == sizeof(ass_req->aoip_transp_addr.ip), sizeof_addr);
+ memcpy(mdcx_info.addr, ass_req->aoip_transp_addr.ip, sizeof(mdcx_info.addr));
+ mdcx_info.port = ass_req->aoip_transp_addr.port;
+
+ /* MGCP MDCX CN */
+ osmo_mgcpc_ep_ci_request(subscr_conn->cn.ci, MGCP_VERB_MDCX, &mdcx_info, subscr_conn->fi,
+ SUBSCR_CONN_FSM_EV_MGCP_EP_OK, SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL, NULL);
+}
+
+static void st_processing_assignment_request_mdcx_cn(struct osmo_fsm_inst *fi, uint32_t event, void *data)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+
+ switch (event) {
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_OK:
+ LOGPFSML(fi, LOGL_DEBUG, "Rx MGCP OK\n");
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_RAN, TIMEOUT_MGW, 0);
+ break;
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL:
+ LOGPFSML(fi, LOGL_ERROR, "MGCP failure, aborting assignment request processing\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
+}
+
+static void st_processing_assignment_request_crcx_ran_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_stat)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+ struct mgcp_conn_peer crcx_info = {};
+ crcx_info.call_id = subscr_conn->mgw_call_id;
+
+ subscr_conn->ran.ci = osmo_mgcpc_ep_ci_add(subscr_conn->ep, "CI-%"PRIu32"-RAN", crcx_info.call_id);
+ osmo_mgcpc_ep_ci_request(subscr_conn->ran.ci, MGCP_VERB_CRCX, &crcx_info, subscr_conn->fi,
+ SUBSCR_CONN_FSM_EV_MGCP_EP_OK, SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL, NULL);
+}
+
+static int tx_assignment_request_to_ran(const struct subscr_conn *subscr_conn)
+{
+ const struct mgcp_conn_peer *rtp_info;
+ const struct bssmap_assignment_rqst *ass_req = &subscr_conn->cn.ass_req;
+ struct msgb *msg;
+ struct sockaddr_storage ss;
+ struct osmo_sockaddr_str aoip_transp_addr;
+
+ /* Fill sockaddr_storage from rtp_info */
+ rtp_info = osmo_mgcpc_ep_ci_get_rtp_info(subscr_conn->ran.ci);
+ if (!rtp_info) {
+ LOGPFSML(subscr_conn->fi, LOGL_ERROR, "failed to get RTP info from MGW, aborting assignment request\n");
+ return -1;
+ }
+ if (osmo_sockaddr_str_from_str(&aoip_transp_addr, rtp_info->addr, rtp_info->port) < 0
+ || osmo_sockaddr_str_to_sockaddr((const struct osmo_sockaddr_str *)&aoip_transp_addr, &ss) < 0) {
+ LOGPFSML(subscr_conn->fi, LOGL_ERROR, "RTP info from MGW is invalid, aborting assignment request\n");
+ return -1;
+ }
+
+ msg = gsm0808_create_ass2(&ass_req->ct,
+ NULL,
+ &ss,
+ &ass_req->scl,
+ ass_req->ci_present ? &ass_req->ci : NULL,
+ ass_req->kc_present ? &ass_req->kc : NULL,
+ ass_req->lcls_present ? &ass_req->lcls : NULL);
+
+ return osmo_sccp_tx_data_msg(g_bsc_nat->ran.sccp_inst->scu, subscr_conn->ran.id, msg);
+}
+
+static void st_processing_assignment_request_crcx_ran(struct osmo_fsm_inst *fi, uint32_t event, void *data)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+
+ switch (event) {
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_OK:
+ LOGPFSML(fi, LOGL_DEBUG, "Rx MGCP OK\n");
+ if (tx_assignment_request_to_ran(subscr_conn) < 0) {
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ return;
+ }
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_WAITING_FOR_ASSIGNMENT_COMPLETE, TIMEOUT_BSC, 0);
+ break;
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL:
+ LOGPFSML(fi, LOGL_ERROR, "MGCP failure, aborting assignment request processing\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
+}
+
+static void st_waiting_for_assignment_complete(struct osmo_fsm_inst *fi, uint32_t event, void *data)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+
+ switch (event) {
+ case SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_COMPLETE:
+ subscr_conn->ran.ass_compl = *(struct bssmap_assignment_complete *)data;
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_COMPLETE_MDCX_RAN, TIMEOUT_MGW, 0);
+ break;
+ case SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_FAILURE:
+ /* The original bssmap message gets forwarded from RAN to CN by
+ * bssmap_ran_handle_assignment_failure() already, so just
+ * reset the FSM to idle here (clears the mgw endpoint). */
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
+}
+
+static void st_processing_assignment_complete_mdcx_ran_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_stat)
+{
+ struct mgcp_conn_peer mdcx_info = {};
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+ struct bssmap_assignment_complete *ass_compl = &subscr_conn->ran.ass_compl;
+
+ /* Set RTP addr + port */
+ osmo_static_assert(sizeof(mdcx_info.addr) == sizeof(ass_compl->aoip_transp_addr.ip), sizeof_addr);
+ memcpy(mdcx_info.addr, ass_compl->aoip_transp_addr.ip, sizeof(mdcx_info.addr));
+ mdcx_info.port = ass_compl->aoip_transp_addr.port;
+
+ /* MGCP MDCX RAN */
+ osmo_mgcpc_ep_ci_request(subscr_conn->ran.ci, MGCP_VERB_MDCX, &mdcx_info, subscr_conn->fi,
+ SUBSCR_CONN_FSM_EV_MGCP_EP_OK, SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL, NULL);
+}
+
+static int tx_assignment_complete_to_cn(const struct subscr_conn *subscr_conn)
+{
+ const struct mgcp_conn_peer *rtp_info;
+ const struct bssmap_assignment_complete *ass_compl = &subscr_conn->ran.ass_compl;
+ struct msgb *msg;
+ struct sockaddr_storage ss;
+ struct osmo_sockaddr_str aoip_transp_addr;
+
+ /* Fill sockaddr_storage from rtp_info */
+ rtp_info = osmo_mgcpc_ep_ci_get_rtp_info(subscr_conn->cn.ci);
+ if (!rtp_info) {
+ LOGPFSML(subscr_conn->fi, LOGL_ERROR, "failed to get RTP info from MGW, aborting assignment complete\n");
+ return -1;
+ }
+ if (osmo_sockaddr_str_from_str(&aoip_transp_addr, rtp_info->addr, rtp_info->port) < 0
+ || osmo_sockaddr_str_to_sockaddr((const struct osmo_sockaddr_str *)&aoip_transp_addr, &ss) < 0) {
+ LOGPFSML(subscr_conn->fi, LOGL_ERROR, "RTP info from MGW is invalid, aborting assignment complete\n");
+ return -1;
+ }
+
+ msg = gsm0808_create_ass_compl2(ass_compl->rr_cause,
+ ass_compl->chosen_channel,
+ ass_compl->chosen_encr_alg,
+ ass_compl->speech_version,
+ &ss,
+ &ass_compl->sc,
+ ass_compl->scl_present ? &ass_compl->scl : NULL,
+ ass_compl->lcls_bss_status_present ? ass_compl->lcls_bss_status : 0);
+
+ return osmo_sccp_tx_data_msg(g_bsc_nat->cn.sccp_inst->scu, subscr_conn->cn.id, msg);
+}
+
+static void st_processing_assignment_complete_mdcx_ran(struct osmo_fsm_inst *fi, uint32_t event, void *data)
+{
+ struct subscr_conn *subscr_conn = (struct subscr_conn *)fi->priv;
+
+ switch (event) {
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_OK:
+ LOGPFSML(fi, LOGL_DEBUG, "Rx MGCP EP OK\n");
+ if (tx_assignment_complete_to_cn(subscr_conn) < 0) {
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ bssmap_tx_assignment_failure_ran(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ return;
+ }
+ /* No timeout for ST_WAITING_FOR_CLEAR_COMMAND, as the FSM will
+ * stay in this state until the call is done. */
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_WAITING_FOR_CLEAR_COMMAND, 0, 0);
+ break;
+ case SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL:
+ LOGPFSML(fi, LOGL_ERROR, "MGCP failure, aborting assignment complete processing\n");
+ bssmap_tx_assignment_failure_cn(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ bssmap_tx_assignment_failure_ran(subscr_conn, GSM0808_CAUSE_PROTOCOL_ERROR_BETWEEN_BSS_AND_MSC);
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
+}
+
+static void st_waiting_for_clear_command(struct osmo_fsm_inst *fi, uint32_t event, void *data)
+{
+ switch (event) {
+ case SUBSCR_CONN_FSM_EV_BSSMAP_CLEAR_COMMAND:
+ /* The original bssmap message gets forwarded from RAN to CN by
+ * bssmap_ran_handle_clear_cmd() already, so just reset the FSM
+ * to idle here (clears the mgw endpoint). */
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
+}
+
+int subscr_conn_fsm_timer_cb(struct osmo_fsm_inst *fi)
+{
+ LOGPFSML(fi, LOGL_ERROR, "Timeout reached, reset FSM to idle\n");
+ osmo_fsm_inst_state_chg(fi, SUBSCR_CONN_FSM_ST_IDLE, 0, 0);
+ return 0;
+}
+
+static struct osmo_fsm_state subscr_conn_fsm_states[] = {
+ [SUBSCR_CONN_FSM_ST_IDLE] = {
+ .name = "IDLE",
+ .in_event_mask = 0
+ | X(SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_REQUEST)
+ | X(SUBSCR_CONN_FSM_EV_BSSMAP_CLEAR_COMMAND)
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_TERM)
+ ,
+ .out_state_mask = 0
+ | X(SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_CN)
+ ,
+ .action = st_idle,
+ .onenter = st_idle_on_enter,
+ },
+ [SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_CN] = {
+ .name = "PROCESSING_ASSIGNMENT_REQUEST_CRCX_CN",
+ .in_event_mask = 0
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_OK)
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL)
+ ,
+ .out_state_mask = 0
+ | X(SUBSCR_CONN_FSM_ST_IDLE)
+ | X(SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_MDCX_CN)
+ ,
+ .action = st_processing_assignment_request_crcx_cn,
+ .onenter = st_processing_assignment_request_crcx_cn_on_enter,
+ },
+ [SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_MDCX_CN] = {
+ .name = "PROCESSING_ASSIGNMENT_REQUEST_MDCX_CN",
+ .in_event_mask = 0
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_OK)
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL)
+ ,
+ .out_state_mask = 0
+ | X(SUBSCR_CONN_FSM_ST_IDLE)
+ | X(SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_RAN)
+ ,
+ .action = st_processing_assignment_request_mdcx_cn,
+ .onenter = st_processing_assignment_request_mdcx_cn_on_enter,
+ },
+ [SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_REQUEST_CRCX_RAN] = {
+ .name = "PROCESSING_ASSIGNMENT_REQUEST_CRCX_RAN",
+ .in_event_mask = 0
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_OK)
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL)
+ ,
+ .out_state_mask = 0
+ | X(SUBSCR_CONN_FSM_ST_IDLE)
+ | X(SUBSCR_CONN_FSM_ST_WAITING_FOR_ASSIGNMENT_COMPLETE)
+ ,
+ .action = st_processing_assignment_request_crcx_ran,
+ .onenter = st_processing_assignment_request_crcx_ran_on_enter,
+ },
+ [SUBSCR_CONN_FSM_ST_WAITING_FOR_ASSIGNMENT_COMPLETE] = {
+ .name = "WAITING_FOR_ASSIGNMENT_COMPLETE",
+ .in_event_mask = 0
+ | X(SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_COMPLETE)
+ | X(SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_FAILURE)
+ ,
+ .out_state_mask = 0
+ | X(SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_COMPLETE_MDCX_RAN)
+ ,
+ .action = st_waiting_for_assignment_complete,
+ },
+ [SUBSCR_CONN_FSM_ST_PROCESSING_ASSIGNMENT_COMPLETE_MDCX_RAN] = {
+ .name = "PROCESSING_ASSIGNMENT_COMPLETE",
+ .in_event_mask = 0
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_OK)
+ | X(SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL)
+ ,
+ .out_state_mask = 0
+ | X(SUBSCR_CONN_FSM_ST_IDLE)
+ | X(SUBSCR_CONN_FSM_ST_WAITING_FOR_CLEAR_COMMAND)
+ ,
+ .action = st_processing_assignment_complete_mdcx_ran,
+ .onenter = st_processing_assignment_complete_mdcx_ran_on_enter,
+ },
+ [SUBSCR_CONN_FSM_ST_WAITING_FOR_CLEAR_COMMAND] = {
+ .name = "WAITING_FOR_CLEAR_COMMAND",
+ .in_event_mask = 0
+ | X(SUBSCR_CONN_FSM_EV_BSSMAP_CLEAR_COMMAND)
+ ,
+ .out_state_mask = 0
+ | X(SUBSCR_CONN_FSM_ST_IDLE)
+ ,
+ .action = st_waiting_for_clear_command,
+ },
+};
+
+const struct value_string subscr_conn_fsm_event_names[] = {
+ OSMO_VALUE_STRING(SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_REQUEST),
+ OSMO_VALUE_STRING(SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_COMPLETE),
+ OSMO_VALUE_STRING(SUBSCR_CONN_FSM_EV_BSSMAP_ASSIGNMENT_FAILURE),
+ OSMO_VALUE_STRING(SUBSCR_CONN_FSM_EV_BSSMAP_CLEAR_COMMAND),
+ OSMO_VALUE_STRING(SUBSCR_CONN_FSM_EV_MGCP_EP_OK),
+ OSMO_VALUE_STRING(SUBSCR_CONN_FSM_EV_MGCP_EP_FAIL),
+ OSMO_VALUE_STRING(SUBSCR_CONN_FSM_EV_MGCP_EP_TERM),
+ { 0, NULL }
+};
+
+struct osmo_fsm subscr_conn_fsm = {
+ .name = "SUBSCR_CONN",
+ .states = subscr_conn_fsm_states,
+ .num_states = ARRAY_SIZE(subscr_conn_fsm_states),
+ .log_subsys = DMAIN,
+ .event_names = subscr_conn_fsm_event_names,
+ .timer_cb = subscr_conn_fsm_timer_cb,
+};
+
+static __attribute__((constructor)) void subscr_conn_fsm_init(void)
+{
+ OSMO_ASSERT(osmo_fsm_register(&subscr_conn_fsm) == 0);
+}
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