lynxis lazus has uploaded this change for review.
Drop iu_client - adopted by osmo-sgsn
The only remaining use of iu_client is osmo-sgsn.
iu_client was originally meant to be used by osmo-msc
and osmo-sgsn. But the abstraction didn't hold up and
osmo-msc stopped using iu_client for a long time.
Move iu_client to osmo-sgsn until it got replaced by a more
direct implementation (similar to IUCS in osmo-msc).
Related: OS#5487
Change-Id: I95a5aeccc314ffdeaa04cc93f4e5947f715dd5de
---
M TODO-RELEASE
M include/osmocom/ranap/iu_client.h
M src/Makefile.am
D src/iu_client.c
4 files changed, 4 insertions(+), 1,328 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-iuh refs/changes/47/40847/1
diff --git a/TODO-RELEASE b/TODO-RELEASE
index 1e1dc88..93c2844 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -14,3 +14,5 @@
libosmo-ranap move declaration (backwards compatible): asn_debug, asn1_xer_print: use osmocom/iuh/iu_common.h instead of iu_client.h
libosmo-ranap move definition (backwards compatible): enum ranap_nsap_addr_enc: use osmocom/ranap/ranap_common.h instead of iu_client.h
libosmo-ranap move declaration (backwards compatible): ranap_iu_vty_init, ranap_iu_vty_config_write: use osmocom/ranap/vty.h instead of iu_client.h
+libosmo-ranap drop iu_client.c adopted by osmo-sgsn
+libosmo-ranap deprecate iu_client.h iu_client.h only contains includes of other header files.
diff --git a/include/osmocom/ranap/iu_client.h b/include/osmocom/ranap/iu_client.h
index 9fd399e..3b9eceb 100644
--- a/include/osmocom/ranap/iu_client.h
+++ b/include/osmocom/ranap/iu_client.h
@@ -1,103 +1,9 @@
#pragma once
-#include <stdbool.h>
-
#include <osmocom/core/defs.h>
-#include <osmocom/core/linuxlist.h>
-#include <osmocom/gsm/gsm48.h>
#include <osmocom/iuh/iu_common.h>
#include <osmocom/ranap/ranap_common.h>
#include <osmocom/ranap/vty.h>
-#include <osmocom/sigtran/sccp_sap.h>
-struct msgb;
-struct osmo_auth_vector;
+#warning "osmocom/ranap/iu_client.h header has been deprecated. Please use iu_common.h, ranap_common.h, vty.h direct"
-struct RANAP_RAB_SetupOrModifiedItemIEs_s;
-struct RANAP_Cause;
-
-struct ranap_iu_rnc;
-
-struct ranap_ue_conn_ctx {
- struct llist_head list;
- struct ranap_iu_rnc *rnc;
- uint32_t conn_id;
- int integrity_active;
- struct gprs_ra_id ra_id;
- enum ranap_nsap_addr_enc rab_assign_addr_enc;
- bool notification; /* send notification to the upstream user */
- /* if true the ue_ctx will be free on Iu release complete */
- bool free_on_release;
- /* Will be set when the Iu Release Command has been sent */
- struct osmo_timer_list release_timeout;
-};
-
-enum ranap_iu_event_new_area_type {
- RANAP_IU_NEW_LAC,
- RANAP_IU_NEW_RAC,
-};
-
-struct ranap_iu_event_new_area {
- const struct osmo_rnc_id *rnc_id;
- enum ranap_iu_event_new_area_type cell_type;
- union {
- const struct osmo_location_area_id *lai;
- const struct osmo_routing_area_id *rai;
- } u;
-};
-
-enum ranap_iu_event_type {
- RANAP_IU_EVENT_RAB_ASSIGN,
- RANAP_IU_EVENT_SECURITY_MODE_COMPLETE,
- RANAP_IU_EVENT_IU_RELEASE, /* An actual Iu Release message was received */
- RANAP_IU_EVENT_LINK_INVALIDATED, /* A SUA link was lost or closed down */
- RANAP_IU_EVENT_NEW_AREA, /* Either a new LAC/RAC has been detected */
-};
-
-extern const struct value_string ranap_iu_event_type_names[];
-static inline const char *ranap_iu_event_type_str(enum ranap_iu_event_type e)
-{
- return get_value_string(ranap_iu_event_type_names, e);
-}
-
-/* Implementations of iu_recv_cb_t shall find the ranap_ue_conn_ctx in msg->dst. */
-typedef int (* ranap_iu_recv_cb_t )(struct msgb *msg, struct gprs_ra_id *ra_id,
- uint16_t *sai);
-
-typedef int (* ranap_iu_event_cb_t )(struct ranap_ue_conn_ctx *ue_ctx,
- enum ranap_iu_event_type type, void *data);
-
-typedef int (* ranap_iu_rab_ass_resp_cb_t )(struct ranap_ue_conn_ctx *ue_ctx, uint8_t rab_id,
- struct RANAP_RAB_SetupOrModifiedItemIEs_s *setup_ies);
-
-int ranap_iu_init(void *ctx, int log_subsystem, const char *sccp_user_name, struct osmo_sccp_instance *sccp,
- ranap_iu_recv_cb_t iu_recv_cb, ranap_iu_event_cb_t iu_event_cb);
-
-int ranap_iu_tx(struct msgb *msg, uint8_t sapi);
-
-int ranap_iu_page_cs(const char *imsi, const uint32_t *tmsi, uint16_t lac)
- OSMO_DEPRECATED("Use ranap_iu_page_cs2 instead");
-
-int ranap_iu_page_ps(const char *imsi, const uint32_t *ptmsi, uint16_t lac, uint8_t rac)
- OSMO_DEPRECATED("Use ranap_iu_page_ps2 instead");
-
-int ranap_iu_page_cs2(const char *imsi, const uint32_t *tmsi, const struct osmo_location_area_id *lai);
-int ranap_iu_page_ps2(const char *imsi, const uint32_t *ptmsi, const struct osmo_routing_area_id *rai);
-
-int ranap_iu_rab_act(struct ranap_ue_conn_ctx *ue_ctx, struct msgb *msg);
-int ranap_iu_rab_deact(struct ranap_ue_conn_ctx *ue_ctx, uint8_t rab_id);
-int ranap_iu_tx_sec_mode_cmd(struct ranap_ue_conn_ctx *uectx, struct osmo_auth_vector *vec,
- int send_ck, int new_key);
-int ranap_iu_tx_common_id(struct ranap_ue_conn_ctx *ue_ctx, const char *imsi);
-int ranap_iu_tx_release(struct ranap_ue_conn_ctx *ctx, const struct RANAP_Cause *cause);
-
-/* Transmit a Iu Release Command and submit event RANAP_IU_EVENT_IU_RELEASE upon
- * Release Complete or timeout. Caller is responsible to free the context and
- * closing the SCCP connection (ranap_iu_free_ue) upon recieval of the event. */
-void ranap_iu_tx_release_free(struct ranap_ue_conn_ctx *ctx,
- const struct RANAP_Cause *cause,
- int timeout);
-
-/* freeing the UE will release all resources
- * This will close the SCCP connection connected to the UE */
-void ranap_iu_free_ue(struct ranap_ue_conn_ctx *ue_ctx);
diff --git a/src/Makefile.am b/src/Makefile.am
index 6fdea3e..b4e7dc4 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -75,7 +75,7 @@
libosmo_ranap_la_LIBADD = $(OSMOCORE_LIBS) $(OSMOGSM_LIBS) $(OSMOVTY_LIBS) $(OSMOSIGTRAN_LIBS) \
$(ASN1C_LIBS) ranap/libosmo-asn1-ranap.la
libosmo_ranap_la_SOURCES = ranap_common.c ranap_encoder.c ranap_decoder.c ranap_msg_factory.c iu_helpers.c \
- ranap_common_cn.c ranap_common_ran.c iu_client.c iu_client_vty.c
+ ranap_common_cn.c ranap_common_ran.c iu_client_vty.c
libosmo_rua_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(RUA_LIBVERSION) -no-undefined
libosmo_rua_la_LIBADD = $(OSMOCORE_LIBS) $(OSMOGSM_LIBS) $(OSMOVTY_LIBS) $(OSMOSIGTRAN_LIBS) \
diff --git a/src/iu_client.c b/src/iu_client.c
deleted file mode 100644
index b54a0b8..0000000
--- a/src/iu_client.c
+++ /dev/null
@@ -1,1232 +0,0 @@
-/* Common parts of IuCS and IuPS interfaces implementation */
-
-/* (C) 2016-2017 by sysmocom s.f.m.c. GmbH <info@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/licenses/>.
- *
- */
-
-#include <stdint.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdbool.h>
-
-#include <asn1c/asn1helpers.h>
-
-#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
-#include <osmocom/ranap/iu_client.h>
-
-#include <osmocom/core/logging.h>
-#include <osmocom/crypt/auth.h>
-#include <osmocom/gprs/gprs_msgb.h>
-#include <osmocom/sigtran/sccp_sap.h>
-#include <osmocom/sigtran/sccp_helpers.h>
-#include <osmocom/ranap/ranap_common_cn.h>
-#include <osmocom/ranap/ranap_ies_defs.h>
-#include <osmocom/ranap/ranap_msg_factory.h>
-
-/* Parsed global RNC id. See also struct RANAP_GlobalRNC_ID, and note that the
- * PLMN identity is a BCD representation of the MCC and MNC.
- * See iu_grnc_id_parse(). */
-struct iu_grnc_id {
- struct osmo_plmn_id plmn;
- uint16_t rnc_id;
-};
-
-struct iu_lac_rac_entry {
- struct llist_head entry;
-
- struct osmo_routing_area_id rai;
-};
-
-/* Entry to cache conn_id <-> sccp_addr mapping in case we receive an empty CR */
-struct iu_new_ctx_entry {
- struct llist_head list;
-
- uint32_t conn_id;
- struct osmo_sccp_addr sccp_addr;
-};
-
-/* A remote RNC (Radio Network Controller, like BSC but for UMTS) that has
- * called us and is currently reachable at the given osmo_sccp_addr. So, when we
- * know a LAC for a subscriber, we can page it at the RNC matching that LAC or
- * RAC. An HNB-GW typically presents itself as if it were a single RNC, even
- * though it may have several RNCs in hNodeBs connected to it. Those will then
- * share the same RNC id, which they actually receive and adopt from the HNB-GW
- * in the HNBAP HNB REGISTER ACCEPT message. */
-struct ranap_iu_rnc {
- struct llist_head entry;
-
- struct osmo_rnc_id rnc_id;
- struct osmo_sccp_addr sccp_addr;
-
- /* A list of struct iu_lac_rac_entry */
- struct llist_head lac_rac_list;
-};
-
-void *talloc_iu_ctx;
-
-ranap_iu_recv_cb_t global_iu_recv_cb = NULL;
-ranap_iu_event_cb_t global_iu_event_cb = NULL;
-int iu_log_subsystem = 0;
-
-#define LOGPIU(level, fmt, args...) \
- LOGP(iu_log_subsystem, level, fmt, ## args)
-
-#define LOGPIUC(level, fmt, args...) \
- LOGPC(iu_log_subsystem, level, fmt, ## args)
-
-static LLIST_HEAD(ue_conn_sccp_addr_list);
-static LLIST_HEAD(ue_conn_ctx_list);
-static LLIST_HEAD(rnc_list);
-
-static struct osmo_sccp_instance *g_sccp;
-static struct osmo_sccp_user *g_scu;
-static struct osmo_sccp_addr g_local_sccp_addr;
-
-/* This rac will be used internally. RAC with 0xff will be rejected */
-#define OSMO_RESERVED_RAC 0xff
-
-const struct value_string ranap_iu_event_type_names[] = {
- OSMO_VALUE_STRING(RANAP_IU_EVENT_RAB_ASSIGN),
- OSMO_VALUE_STRING(RANAP_IU_EVENT_SECURITY_MODE_COMPLETE),
- OSMO_VALUE_STRING(RANAP_IU_EVENT_IU_RELEASE),
- OSMO_VALUE_STRING(RANAP_IU_EVENT_LINK_INVALIDATED),
- OSMO_VALUE_STRING(RANAP_IU_EVENT_NEW_AREA),
- { 0, NULL }
-};
-
-static int global_iu_event(struct ranap_ue_conn_ctx *ue_ctx,
- enum ranap_iu_event_type type,
- void *data)
-{
- if (!global_iu_event_cb)
- return 0;
-
- if (ue_ctx && !ue_ctx->notification)
- return 0;
-
- LOGPIU(LOGL_DEBUG, "Submit Iu event to upper layer: %s\n", ranap_iu_event_type_str(type));
-
- return global_iu_event_cb(ue_ctx, type, data);
-}
-
-static void global_iu_event_new_area(const struct osmo_rnc_id *rnc_id, const struct osmo_routing_area_id *rai)
-{
- struct ranap_iu_event_new_area new_area = (struct ranap_iu_event_new_area) {
- .rnc_id = rnc_id,
- .cell_type = RANAP_IU_NEW_RAC
- };
-
- if (rai->rac == OSMO_RESERVED_RAC) {
- new_area.cell_type = RANAP_IU_NEW_LAC;
- new_area.u.lai = &rai->lac;
- } else {
- new_area.cell_type = RANAP_IU_NEW_RAC;
- new_area.u.rai = rai;
- }
-
- global_iu_event(NULL, RANAP_IU_EVENT_NEW_AREA, &new_area);
-}
-
-
-static void ue_conn_ctx_release_timeout_cb(void *ctx_)
-{
- struct ranap_ue_conn_ctx *ctx = (struct ranap_ue_conn_ctx *)ctx_;
- global_iu_event(ctx, RANAP_IU_EVENT_IU_RELEASE, NULL);
-}
-
-static struct ranap_ue_conn_ctx *ue_conn_ctx_alloc(struct ranap_iu_rnc *rnc, uint32_t conn_id)
-{
- struct ranap_ue_conn_ctx *ctx = talloc_zero(talloc_iu_ctx, struct ranap_ue_conn_ctx);
-
- ctx->rnc = rnc;
- ctx->conn_id = conn_id;
- ctx->notification = true;
- ctx->free_on_release = false;
- osmo_timer_setup(&ctx->release_timeout,
- ue_conn_ctx_release_timeout_cb,
- ctx);
- llist_add(&ctx->list, &ue_conn_ctx_list);
-
- return ctx;
-}
-
-static struct ranap_ue_conn_ctx *ue_conn_ctx_find(uint32_t conn_id)
-{
- struct ranap_ue_conn_ctx *ctx;
-
- llist_for_each_entry(ctx, &ue_conn_ctx_list, list) {
- if (ctx->conn_id == conn_id)
- return ctx;
- }
- return NULL;
-}
-
-void ranap_iu_free_ue(struct ranap_ue_conn_ctx *ue_ctx)
-{
- if (!ue_ctx)
- return;
-
- osmo_timer_del(&ue_ctx->release_timeout);
- osmo_sccp_tx_disconn(g_scu, ue_ctx->conn_id, NULL, 0);
- llist_del(&ue_ctx->list);
- talloc_free(ue_ctx);
-}
-
-static void ue_conn_sccp_addr_add(uint32_t conn_id, const struct osmo_sccp_addr *calling_addr)
-{
- struct iu_new_ctx_entry *entry = talloc_zero(talloc_iu_ctx, struct iu_new_ctx_entry);
-
- entry->conn_id = conn_id;
- entry->sccp_addr = *calling_addr;
-
- llist_add(&entry->list, &ue_conn_sccp_addr_list);
-}
-
-static const struct osmo_sccp_addr *ue_conn_sccp_addr_find(uint32_t conn_id)
-{
- struct iu_new_ctx_entry *entry;
- llist_for_each_entry(entry, &ue_conn_sccp_addr_list, list) {
- if (entry->conn_id == conn_id)
- return &entry->sccp_addr;
- }
- return NULL;
-}
-
-static void ue_conn_sccp_addr_del(uint32_t conn_id)
-{
- struct iu_new_ctx_entry *entry;
- llist_for_each_entry(entry, &ue_conn_sccp_addr_list, list) {
- if (entry->conn_id == conn_id) {
- llist_del(&entry->list);
- talloc_free(entry);
- return;
- }
- }
-}
-
-static struct ranap_iu_rnc *iu_rnc_alloc(const struct osmo_rnc_id *rnc_id, struct osmo_sccp_addr *addr)
-{
- struct ranap_iu_rnc *rnc = talloc_zero(talloc_iu_ctx, struct ranap_iu_rnc);
- OSMO_ASSERT(rnc);
-
- INIT_LLIST_HEAD(&rnc->lac_rac_list);
-
- rnc->rnc_id = *rnc_id;
- rnc->sccp_addr = *addr;
- llist_add(&rnc->entry, &rnc_list);
-
- LOGPIU(LOGL_NOTICE, "New RNC %s at %s\n", osmo_rnc_id_name(&rnc->rnc_id), osmo_sccp_addr_dump(addr));
-
- return rnc;
-}
-
-/* Find a match for the given LAC (and RAC). For CS, pass rac as 0.
- * If rnc and lre pointers are not NULL, *rnc / *lre are set to NULL if no match is found, or to the
- * match if a match is found. Return true if a match is found. */
-static bool iu_rnc_lac_rac_find(struct ranap_iu_rnc **rnc, struct iu_lac_rac_entry **lre,
- const struct osmo_routing_area_id *ra_id)
-{
- struct ranap_iu_rnc *r;
- struct iu_lac_rac_entry *e;
-
- if (rnc)
- *rnc = NULL;
- if (lre)
- *lre = NULL;
-
- llist_for_each_entry(r, &rnc_list, entry) {
- llist_for_each_entry(e, &r->lac_rac_list, entry) {
- if (!osmo_rai_cmp(&e->rai, ra_id)) {
- if (rnc)
- *rnc = r;
- if (lre)
- *lre = e;
- return true;
- }
- }
- }
- return false;
-}
-
-/* legacy, do a first match with ignoring PLMN */
-static bool iu_rnc_lac_rac_find_legacy(struct ranap_iu_rnc **rnc, struct iu_lac_rac_entry **lre,
- uint16_t lac, uint8_t rac)
-{
- struct ranap_iu_rnc *r;
- struct iu_lac_rac_entry *e;
-
- if (rnc)
- *rnc = NULL;
- if (lre)
- *lre = NULL;
-
- llist_for_each_entry(r, &rnc_list, entry) {
- llist_for_each_entry(e, &r->lac_rac_list, entry) {
- if (e->rai.lac.lac == lac && e->rai.rac == rac) {
- if (rnc)
- *rnc = r;
- if (lre)
- *lre = e;
- return true;
- }
- }
- }
- return false;
-}
-
-static struct ranap_iu_rnc *iu_rnc_id_find(struct osmo_rnc_id *rnc_id)
-{
- struct ranap_iu_rnc *rnc;
- llist_for_each_entry(rnc, &rnc_list, entry) {
- if (!osmo_rnc_id_cmp(&rnc->rnc_id, rnc_id))
- return rnc;
- }
- return NULL;
-}
-
-static bool same_sccp_addr(struct osmo_sccp_addr *a, struct osmo_sccp_addr *b)
-{
- char buf[256];
- osmo_strlcpy(buf, osmo_sccp_addr_dump(a), sizeof(buf));
- return !strcmp(buf, osmo_sccp_addr_dump(b));
-}
-
-static struct ranap_iu_rnc *iu_rnc_register(struct osmo_rnc_id *rnc_id,
- const struct osmo_routing_area_id *rai,
- struct osmo_sccp_addr *addr)
-{
- struct ranap_iu_rnc *rnc;
- struct ranap_iu_rnc *old_rnc;
- struct iu_lac_rac_entry *lre;
-
- /* Make sure we know this rnc_id and that this SCCP address is in our records */
- rnc = iu_rnc_id_find(rnc_id);
-
- if (rnc) {
- if (!same_sccp_addr(&rnc->sccp_addr, addr)) {
- LOGPIU(LOGL_NOTICE, "RNC %s changed its SCCP addr to %s (LAC/RAC %s)\n",
- osmo_rnc_id_name(rnc_id), osmo_sccp_addr_dump(addr), osmo_rai_name2(rai));
- rnc->sccp_addr = *addr;
- }
- } else
- rnc = iu_rnc_alloc(rnc_id, addr);
-
- /* Detect whether the LAC,RAC is already recorded in another RNC */
- iu_rnc_lac_rac_find(&old_rnc, &lre, rai);
-
- if (old_rnc && old_rnc != rnc) {
- /* LAC, RAC already exists in a different RNC */
- LOGPIU(LOGL_NOTICE, "LAC/RAC %s moved from RNC %s %s",
- osmo_rai_name2(rai),
- osmo_rnc_id_name(&old_rnc->rnc_id), osmo_sccp_addr_dump(&old_rnc->sccp_addr));
- LOGPIUC(LOGL_NOTICE, " to RNC %s %s\n",
- osmo_rnc_id_name(&rnc->rnc_id), osmo_sccp_addr_dump(&rnc->sccp_addr));
-
- llist_del(&lre->entry);
- llist_add(&lre->entry, &rnc->lac_rac_list);
- global_iu_event_new_area(rnc_id, rai);
- } else if (!old_rnc) {
- /* LAC, RAC not recorded yet */
- LOGPIU(LOGL_NOTICE, "RNC %s: new LAC/RAC %s\n", osmo_rnc_id_name(rnc_id), osmo_rai_name2(rai));
- lre = talloc_zero(rnc, struct iu_lac_rac_entry);
- lre->rai = *rai;
- llist_add(&lre->entry, &rnc->lac_rac_list);
- global_iu_event_new_area(rnc_id, rai);
- }
- /* else, LAC,RAC already recorded with the current RNC. */
-
- return rnc;
-}
-
-/***********************************************************************
- * RANAP handling
- ***********************************************************************/
-
-int ranap_iu_rab_act(struct ranap_ue_conn_ctx *ue_ctx, struct msgb *msg)
-{
- struct osmo_scu_prim *prim;
-
- /* wrap RANAP message in SCCP N-DATA.req */
- prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
- prim->u.data.conn_id = ue_ctx->conn_id;
- osmo_prim_init(&prim->oph,
- SCCP_SAP_USER,
- OSMO_SCU_PRIM_N_DATA,
- PRIM_OP_REQUEST,
- msg);
- return osmo_sccp_user_sap_down(g_scu, &prim->oph);
-}
-
-int ranap_iu_rab_deact(struct ranap_ue_conn_ctx *ue_ctx, uint8_t rab_id)
-{
- /* FIXME */
- return -1;
-}
-
-int ranap_iu_tx_sec_mode_cmd(struct ranap_ue_conn_ctx *uectx, struct osmo_auth_vector *vec,
- int send_ck, int new_key)
-{
- struct osmo_scu_prim *prim;
- struct msgb *msg;
-
- /* create RANAP message */
- msg = ranap_new_msg_sec_mod_cmd(vec->ik, send_ck? vec->ck : NULL,
- new_key ? RANAP_KeyStatus_new : RANAP_KeyStatus_old);
- msg->l2h = msg->data;
- /* wrap RANAP message in SCCP N-DATA.req */
- prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
- prim->u.data.conn_id = uectx->conn_id;
- osmo_prim_init(&prim->oph, SCCP_SAP_USER,
- OSMO_SCU_PRIM_N_DATA,
- PRIM_OP_REQUEST, msg);
- return osmo_sccp_user_sap_down(g_scu, &prim->oph);
-}
-
-int ranap_iu_tx_common_id(struct ranap_ue_conn_ctx *uectx, const char *imsi)
-{
- struct msgb *msg;
- struct osmo_scu_prim *prim;
-
- LOGPIU(LOGL_INFO, "Transmitting RANAP CommonID (SCCP conn_id %u)\n",
- uectx->conn_id);
-
- msg = ranap_new_msg_common_id(imsi);
- msg->l2h = msg->data;
- prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
- prim->u.data.conn_id = uectx->conn_id;
- osmo_prim_init(&prim->oph, SCCP_SAP_USER,
- OSMO_SCU_PRIM_N_DATA,
- PRIM_OP_REQUEST, msg);
- return osmo_sccp_user_sap_down(g_scu, &prim->oph);
-}
-
-static int iu_grnc_id_parse(struct osmo_rnc_id *dst, struct RANAP_GlobalRNC_ID *src)
-{
- /* The size is coming from arbitrary sender, check it gracefully */
- if (src->pLMNidentity.size != 3) {
- LOGPIU(LOGL_ERROR, "Invalid PLMN Identity size:"
- " should be 3, is %d\n", src->pLMNidentity.size);
- return -1;
- }
- osmo_plmn_from_bcd(&src->pLMNidentity.buf[0], &dst->plmn);
- dst->rnc_id = (uint16_t)src->rNC_ID;
- return 0;
-}
-
-#if 0
- -- not used at present --
-static int iu_grnc_id_compose(struct iu_grnc_id *src, struct RANAP_GlobalRNC_ID *dst)
-{
- /* The caller must ensure proper size */
- OSMO_ASSERT(dst->pLMNidentity.size == 3);
- gsm48_mcc_mnc_to_bcd(&dst->pLMNidentity.buf[0],
- src->mcc, src->mnc);
- dst->rNC_ID = src->rnc_id;
- return 0;
-}
-#endif
-
-struct new_ue_conn_ctx {
- struct osmo_sccp_addr sccp_addr;
- uint32_t conn_id;
-};
-
-static int ranap_handle_co_initial_ue(void *ctx, RANAP_InitialUE_MessageIEs_t *ies)
-{
- struct new_ue_conn_ctx *new_ctx = ctx;
- struct gprs_ra_id ra_id = {};
- struct osmo_routing_area_id ra_id2 = {};
- struct osmo_rnc_id rnc_id = {};
- uint16_t sai;
- struct ranap_ue_conn_ctx *ue;
- struct msgb *msg = msgb_alloc(256, "RANAP->NAS");
- struct ranap_iu_rnc *rnc;
-
- if (ranap_parse_lai(&ra_id, &ies->lai) != 0) {
- LOGPIU(LOGL_ERROR, "Failed to parse RANAP LAI IE\n");
- return -1;
- }
-
- if (ies->presenceMask & INITIALUE_MESSAGEIES_RANAP_RAC_PRESENT) {
- ra_id.rac = asn1str_to_u8(&ies->rac);
- if (ra_id.rac == OSMO_RESERVED_RAC) {
- LOGPIU(LOGL_ERROR,
- "Rejecting RNC with invalid/internally used RAC 0x%02x\n", ra_id.rac);
- return -1;
- }
- } else {
- ra_id.rac = OSMO_RESERVED_RAC;
- }
-
- if (iu_grnc_id_parse(&rnc_id, &ies->globalRNC_ID) != 0) {
- LOGPIU(LOGL_ERROR,
- "Failed to parse RANAP Global-RNC-ID IE\n");
- return -1;
- }
-
- sai = asn1str_to_u16(&ies->sai.sAC);
- msgb_gmmh(msg) = msgb_put(msg, ies->nas_pdu.size);
- memcpy(msgb_gmmh(msg), ies->nas_pdu.buf, ies->nas_pdu.size);
-
- gprs_rai_to_osmo(&ra_id2, &ra_id);
-
- /* Make sure we know the RNC Id and LAC+RAC coming in on this connection. */
- rnc = iu_rnc_register(&rnc_id, &ra_id2, &new_ctx->sccp_addr);
-
- ue = ue_conn_ctx_alloc(rnc, new_ctx->conn_id);
- OSMO_ASSERT(ue);
- ue->ra_id = ra_id;
-
- /* Feed into the MM layer */
- msg->dst = ue;
- global_iu_recv_cb(msg, &ra_id, &sai);
-
- msgb_free(msg);
-
- return 0;
-}
-
-static int ranap_handle_co_dt(void *ctx, RANAP_DirectTransferIEs_t *ies)
-{
- struct gprs_ra_id _ra_id, *ra_id = NULL;
- uint16_t _sai, *sai = NULL;
- struct msgb *msg = msgb_alloc(256, "RANAP->NAS");
-
- if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_LAI_PRESENT) {
- if (ranap_parse_lai(&_ra_id, &ies->lai) != 0) {
- LOGPIU(LOGL_ERROR, "Failed to parse RANAP LAI IE\n");
- return -1;
- }
- ra_id = &_ra_id;
- if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_RAC_PRESENT) {
- _ra_id.rac = asn1str_to_u8(&ies->rac);
- }
- if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_SAI_PRESENT) {
- _sai = asn1str_to_u16(&ies->sai.sAC);
- sai = &_sai;
- }
- }
-
- msgb_gmmh(msg) = msgb_put(msg, ies->nas_pdu.size);
- memcpy(msgb_gmmh(msg), ies->nas_pdu.buf, ies->nas_pdu.size);
-
- /* Feed into the MM/CC/SMS-CP layer */
- msg->dst = ctx;
- global_iu_recv_cb(msg, ra_id, sai);
-
- msgb_free(msg);
-
- return 0;
-}
-
-static int ranap_handle_co_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies)
-{
- if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT)
- LOGPIU(LOGL_ERROR, "Rx Error Indication (%s)\n",
- ranap_cause_str(&ies->cause));
- else
- LOGPIU(LOGL_ERROR, "Rx Error Indication\n");
-
- return 0;
-}
-
-int ranap_iu_tx(struct msgb *msg_nas, uint8_t sapi)
-{
- struct ranap_ue_conn_ctx *uectx = msg_nas->dst;
- struct msgb *msg;
- struct osmo_scu_prim *prim;
-
- if (!uectx) {
- LOGPIU(LOGL_ERROR, "Discarding to-be-transmitted L3 Message as RANAP DT with unset dst SCCP conn_id!\n");
- return -ENOTCONN;
- }
-
- LOGPIU(LOGL_INFO, "Transmitting L3 Message as RANAP DT (SCCP conn_id %u)\n",
- uectx->conn_id);
-
- msg = ranap_new_msg_dt(sapi, msg_nas->data, msgb_length(msg_nas));
- msgb_free(msg_nas);
- msg->l2h = msg->data;
- prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
- prim->u.data.conn_id = uectx->conn_id;
- osmo_prim_init(&prim->oph, SCCP_SAP_USER,
- OSMO_SCU_PRIM_N_DATA,
- PRIM_OP_REQUEST, msg);
- return osmo_sccp_user_sap_down(g_scu, &prim->oph);
-}
-
-/* Send Iu Release for the given UE connection.
- * If cause is NULL, Normal Release cause is sent, otherwise
- * the provided cause. */
-int ranap_iu_tx_release(struct ranap_ue_conn_ctx *ctx, const struct RANAP_Cause *cause)
-{
- struct msgb *msg;
- struct osmo_scu_prim *prim;
- static const struct RANAP_Cause default_cause = {
- .present = RANAP_Cause_PR_nAS,
- .choice.radioNetwork = RANAP_CauseNAS_normal_release,
- };
-
- if (!cause)
- cause = &default_cause;
-
- msg = ranap_new_msg_iu_rel_cmd(cause);
- msg->l2h = msg->data;
- prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
- prim->u.data.conn_id = ctx->conn_id;
- osmo_prim_init(&prim->oph, SCCP_SAP_USER,
- OSMO_SCU_PRIM_N_DATA,
- PRIM_OP_REQUEST, msg);
- return osmo_sccp_user_sap_down(g_scu, &prim->oph);
-}
-
-void ranap_iu_tx_release_free(struct ranap_ue_conn_ctx *ctx,
- const struct RANAP_Cause *cause,
- int timeout)
-{
- ctx->notification = false;
- ctx->free_on_release = true;
- int ret = ranap_iu_tx_release(ctx, cause);
- /* On Tx failure, trigger timeout immediately, as the response will never arrive */
- if (ret)
- timeout = 0;
-
- osmo_timer_schedule(&ctx->release_timeout, timeout, 0);
-}
-
-static int ranap_handle_co_iu_rel_req(struct ranap_ue_conn_ctx *ctx, RANAP_Iu_ReleaseRequestIEs_t *ies)
-{
- LOGPIU(LOGL_INFO, "Received Iu Release Request, Sending Release Command\n");
- ranap_iu_tx_release(ctx, &ies->cause);
- return 0;
-}
-
-static int ranap_handle_co_rab_ass_resp(struct ranap_ue_conn_ctx *ctx, RANAP_RAB_AssignmentResponseIEs_t *ies)
-{
- int rc = -1;
-
- LOGPIU(LOGL_INFO,
- "Rx RAB Assignment Response for UE conn_id %u\n", ctx->conn_id);
- if (ies->presenceMask & RAB_ASSIGNMENTRESPONSEIES_RANAP_RAB_SETUPORMODIFIEDLIST_PRESENT) {
- /* TODO: Iterate over list of SetupOrModifiedList IEs and handle each one */
- RANAP_IE_t *ranap_ie = ies->raB_SetupOrModifiedList.raB_SetupOrModifiedList_ies.list.array[0];
- RANAP_RAB_SetupOrModifiedItemIEs_t setup_ies;
-
- rc = ranap_decode_rab_setupormodifieditemies_fromlist(&setup_ies, &ranap_ie->value);
- if (rc) {
- LOGPIU(LOGL_ERROR, "Error in ranap_decode_rab_setupormodifieditemies()\n");
- return rc;
- }
-
- rc = global_iu_event(ctx, RANAP_IU_EVENT_RAB_ASSIGN, &setup_ies);
-
- ranap_free_rab_setupormodifieditemies(&setup_ies);
- }
- /* FIXME: handle RAB Ass failure? */
-
- return rc;
-}
-
-static void cn_ranap_handle_co_initial(void *ctx, ranap_message *message)
-{
- int rc;
-
- LOGPIU(LOGL_NOTICE, "handle_co_initial(dir=%u, proc=%u)\n", message->direction, message->procedureCode);
-
- if (message->direction != RANAP_RANAP_PDU_PR_initiatingMessage
- || message->procedureCode != RANAP_ProcedureCode_id_InitialUE_Message) {
- LOGPIU(LOGL_ERROR, "Expected direction 'InitiatingMessage',"
- " procedureCode 'InitialUE_Message', instead got %u and %u\n",
- message->direction, message->procedureCode);
- rc = -1;
- }
- else
- rc = ranap_handle_co_initial_ue(ctx, &message->msg.initialUE_MessageIEs);
-
- if (rc) {
- LOGPIU(LOGL_ERROR, "Error in %s (%d)\n", __func__, rc);
- /* TODO handling of the error? */
- }
-}
-
-/* Entry point for connection-oriented RANAP message */
-static void cn_ranap_handle_co(void *ctx, ranap_message *message)
-{
- int rc;
-
- LOGPIU(LOGL_NOTICE, "handle_co(dir=%u, proc=%u)\n", message->direction, message->procedureCode);
-
- switch (message->direction) {
- case RANAP_RANAP_PDU_PR_initiatingMessage:
- switch (message->procedureCode) {
- case RANAP_ProcedureCode_id_InitialUE_Message:
- LOGPIU(LOGL_ERROR, "Got InitialUE_Message but this is not a new conn\n");
- rc = -1;
- break;
- case RANAP_ProcedureCode_id_DirectTransfer:
- rc = ranap_handle_co_dt(ctx, &message->msg.directTransferIEs);
- break;
- case RANAP_ProcedureCode_id_ErrorIndication:
- rc = ranap_handle_co_err_ind(ctx, &message->msg.errorIndicationIEs);
- break;
- case RANAP_ProcedureCode_id_Iu_ReleaseRequest:
- /* Iu Release Request */
- rc = ranap_handle_co_iu_rel_req(ctx, &message->msg.iu_ReleaseRequestIEs);
- break;
- default:
- LOGPIU(LOGL_ERROR, "Received Initiating Message: unknown Procedure Code %d\n",
- message->procedureCode);
- rc = -1;
- break;
- }
- break;
- case RANAP_RANAP_PDU_PR_successfulOutcome:
- switch (message->procedureCode) {
- case RANAP_ProcedureCode_id_SecurityModeControl:
- /* Security Mode Complete */
- rc = global_iu_event(ctx, RANAP_IU_EVENT_SECURITY_MODE_COMPLETE, NULL);
- break;
- case RANAP_ProcedureCode_id_Iu_Release:
- /* Iu Release Complete */
- rc = global_iu_event(ctx, RANAP_IU_EVENT_IU_RELEASE, NULL);
- if (rc) {
- LOGPIU(LOGL_ERROR, "Iu Release event: Iu Event callback returned %d\n",
- rc);
- }
- break;
- default:
- LOGPIU(LOGL_ERROR, "Received Successful Outcome: unknown Procedure Code %d\n",
- message->procedureCode);
- rc = -1;
- break;
- }
- break;
- case RANAP_RANAP_PDU_PR_outcome:
- switch (message->procedureCode) {
- case RANAP_ProcedureCode_id_RAB_Assignment:
- /* RAB Assignment Response */
- rc = ranap_handle_co_rab_ass_resp(ctx, &message->msg.raB_AssignmentResponseIEs);
- break;
- default:
- LOGPIU(LOGL_ERROR, "Received Outcome: unknown Procedure Code %d\n",
- message->procedureCode);
- rc = -1;
- break;
- }
- break;
- case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
- default:
- LOGPIU(LOGL_ERROR, "Received Unsuccessful Outcome: Procedure Code %d\n",
- message->procedureCode);
- rc = -1;
- break;
- }
-
- if (rc) {
- LOGPIU(LOGL_ERROR, "Error in %s (%d)\n", __func__, rc);
- /* TODO handling of the error? */
- }
-}
-
-static int ranap_handle_cl_reset_req(void *ctx, RANAP_ResetIEs_t *ies)
-{
- struct osmo_scu_prim *prim = (struct osmo_scu_prim *) ctx;
- struct osmo_scu_unitdata_param *ud_prim = &prim->u.unitdata;
- RANAP_GlobalRNC_ID_t *grnc_id = NULL;
- struct msgb *resp;
-
- OSMO_ASSERT(prim->oph.primitive == OSMO_SCU_PRIM_N_UNITDATA);
-
- /* FIXME: verify ies.cN_DomainIndicator */
-
- if (ies->presenceMask & RESETIES_RANAP_GLOBALRNC_ID_PRESENT)
- grnc_id = &ies->globalRNC_ID;
-
- /* send reset response */
- resp = ranap_new_msg_reset_ack(ies->cN_DomainIndicator, grnc_id);
- if (!resp)
- return -ENOMEM;
- resp->l2h = resp->data;
- return osmo_sccp_tx_unitdata_msg(g_scu, &g_local_sccp_addr, &ud_prim->calling_addr, resp);
-}
-
-static int ranap_handle_cl_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies)
-{
- if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT)
- LOGPIU(LOGL_ERROR, "Rx Error Indication (%s)\n",
- ranap_cause_str(&ies->cause));
- else
- LOGPIU(LOGL_ERROR, "Rx Error Indication\n");
-
- return 0;
-}
-
-/* Entry point for connection-less RANAP message */
-static void cn_ranap_handle_cl(void *ctx, ranap_message *message)
-{
- int rc;
-
- switch (message->direction) {
- case RANAP_RANAP_PDU_PR_initiatingMessage:
- switch (message->procedureCode) {
- case RANAP_ProcedureCode_id_Reset:
- /* received reset.req, send reset.resp */
- rc = ranap_handle_cl_reset_req(ctx, &message->msg.resetIEs);
- break;
- case RANAP_ProcedureCode_id_ErrorIndication:
- rc = ranap_handle_cl_err_ind(ctx, &message->msg.errorIndicationIEs);
- break;
- default:
- rc = -1;
- break;
- }
- break;
- case RANAP_RANAP_PDU_PR_successfulOutcome:
- case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
- case RANAP_RANAP_PDU_PR_outcome:
- default:
- rc = -1;
- break;
- }
-
- if (rc) {
- LOGPIU(LOGL_ERROR, "Error in %s (%d)\n", __func__, rc);
- /* TODO handling of the error? */
- }
-}
-
-/***********************************************************************
- * Paging
- ***********************************************************************/
-
-/* Send a paging command down a given SCCP User. tmsi and paging_cause are
- * optional and may be passed NULL and 0, respectively, to disable their use.
- * See enum RANAP_PagingCause.
- *
- * If TMSI is given, the IMSI is not sent over the air interface. Nevertheless,
- * the IMSI is still required for resolution in the HNB-GW and/or(?) RNC. */
-static int iu_tx_paging_cmd(struct osmo_sccp_addr *called_addr,
- const char *imsi, const uint32_t *tmsi,
- bool is_ps, uint32_t paging_cause)
-{
- struct msgb *msg;
- msg = ranap_new_msg_paging_cmd(imsi, tmsi, is_ps ? 1 : 0, paging_cause);
- msg->l2h = msg->data;
- return osmo_sccp_tx_unitdata_msg(g_scu, &g_local_sccp_addr, called_addr, msg);
-}
-
-static int iu_page(const char *imsi, const uint32_t *tmsi_or_ptmsi,
- uint16_t lac, uint8_t rac, bool is_ps)
-{
- struct ranap_iu_rnc *rnc;
- const char *log_msg;
- int log_level;
- int paged = 0;
-
- iu_rnc_lac_rac_find_legacy(&rnc, NULL, lac, rac);
- if (rnc) {
- if (iu_tx_paging_cmd(&rnc->sccp_addr, imsi, tmsi_or_ptmsi, is_ps, 0) == 0) {
- log_msg = "Paging";
- log_level = LOGL_DEBUG;
- paged = 1;
- } else {
- log_msg = "Paging failed";
- log_level = LOGL_ERROR;
- }
- } else {
- log_msg = "Found no RNC to Page";
- log_level = LOGL_ERROR;
- }
-
- if (is_ps)
- LOGPIU(log_level, "IuPS: %s on LAC %d RAC %d", log_msg, lac, rac);
- else
- LOGPIU(log_level, "IuCS: %s on LAC %d", log_msg, lac);
- if (rnc)
- LOGPIUC(log_level, " at SCCP-addr %s", osmo_sccp_addr_dump(&rnc->sccp_addr));
- if (tmsi_or_ptmsi)
- LOGPIUC(log_level, ", for %s %08x\n", is_ps? "PTMSI" : "TMSI", *tmsi_or_ptmsi);
- else
- LOGPIUC(log_level, ", for IMSI %s\n", imsi);
-
- return paged;
-}
-
-/*! Old paging() doesn't use PLMN and transmit paging command only to the first RNC */
-int ranap_iu_page_cs(const char *imsi, const uint32_t *tmsi, uint16_t lac)
-{
- return iu_page(imsi, tmsi, lac, 0, false);
-}
-
-/*! Old paging() doesn't use PLMN and transmit paging command only to the first RNC */
-int ranap_iu_page_ps(const char *imsi, const uint32_t *ptmsi, uint16_t lac, uint8_t rac)
-{
- return iu_page(imsi, ptmsi, lac, rac, true);
-}
-
-/*! Transmit a single page request towards all RNCs serving the specific LAI (no page retransmission).
- *
- * \param imsi the imsi as human readable string
- * \param tmsi NULL or pointer to the tmsi
- * \param lai full Location Area Identifier
- * \return amount of paged RNCs. 0 when no RNC found.
- */
-int ranap_iu_page_cs2(const char *imsi, const uint32_t *tmsi, const struct osmo_location_area_id *lai)
-{
- struct ranap_iu_rnc *rnc;
- struct iu_lac_rac_entry *entry;
- char log_msg[32] = {};
- int paged = 0;
- int rc = 0;
-
- /* find all RNCs which are serving this LA */
- llist_for_each_entry(rnc, &rnc_list, entry) {
- llist_for_each_entry(entry, &rnc->lac_rac_list, entry) {
- if (osmo_lai_cmp(&entry->rai.lac, lai))
- continue;
-
- rc = iu_tx_paging_cmd(&rnc->sccp_addr, imsi, tmsi, false, 0);
- if (rc > 0) {
- LOGPIU(LOGL_ERROR, "IuCS: Failed to tx Paging RNC %s for LAC %s for IMSI %s / TMSI %08x",
- osmo_rnc_id_name(&rnc->rnc_id),
- osmo_lai_name(lai), imsi, tmsi ? *tmsi : GSM_RESERVED_TMSI);
- }
- paged++;
- break;
- }
- }
-
- if (tmsi)
- snprintf(log_msg, sizeof(log_msg), "for TMSI %08x\n", *tmsi);
- else
- snprintf(log_msg, sizeof(log_msg) - 1, "for IMSI %s\n", imsi);
-
- if (paged)
- LOGPIU(LOGL_DEBUG, "IuPS: Paged %d RNCs on LAI %s for %s", paged, osmo_lai_name(lai), log_msg);
- else
- LOGPIU(LOGL_INFO, "IuPS: Found no RNC to Page on LAI %s for %s", osmo_lai_name(lai), log_msg);
-
-
- return paged;
-}
-
-/*! Transmit a single page request towards all RNCs serving the specific RAI (no page retransmission).
- *
- * \param imsi the imsi as human readable string
- * \param ptmsi NULL or pointer to the tmsi
- * \param rai full Location Area Identifier
- * \return amount of paged RNCs. 0 when no RNC found.
- */
-int ranap_iu_page_ps2(const char *imsi, const uint32_t *ptmsi, const struct osmo_routing_area_id *rai)
-{
- struct ranap_iu_rnc *rnc;
- struct iu_lac_rac_entry *entry;
- char log_msg[32] = {};
- int paged = 0;
- int rc = 0;
-
- /* find all RNCs which are serving this RAC */
- llist_for_each_entry(rnc, &rnc_list, entry) {
- llist_for_each_entry(entry, &rnc->lac_rac_list, entry) {
- if (osmo_rai_cmp(&entry->rai, rai))
- continue;
-
- rc = iu_tx_paging_cmd(&rnc->sccp_addr, imsi, ptmsi, true, 0);
- if (rc > 0) {
- LOGPIU(LOGL_ERROR, "IuPS: Failed to tx Paging RNC %s for RAC %s for IMSI %s / P-TMSI %08x",
- osmo_rnc_id_name(&rnc->rnc_id),
- osmo_rai_name2(rai), imsi, ptmsi ? *ptmsi : GSM_RESERVED_TMSI);
- }
- paged++;
- break;
- }
- }
-
- if (ptmsi)
- snprintf(log_msg, sizeof(log_msg) - 1, "for PTMSI %08x\n", *ptmsi);
- else
- snprintf(log_msg, sizeof(log_msg) - 1, "for IMSI %s\n", imsi);
-
- if (paged)
- LOGPIU(LOGL_DEBUG, "IuPS: Paged %d RNCs on RAI %s for %s", paged, osmo_rai_name2(rai), log_msg);
- else
- LOGPIU(LOGL_INFO, "IuPS: Found no RNC to Page on RAI %s for %s", osmo_rai_name2(rai), log_msg);
-
- return paged;
-}
-
-/***********************************************************************
- *
- ***********************************************************************/
-
-int tx_unitdata(struct osmo_sccp_user *scu);
-int tx_conn_req(struct osmo_sccp_user *scu, uint32_t conn_id);
-
-struct osmo_prim_hdr *make_conn_req(uint32_t conn_id);
-struct osmo_prim_hdr *make_dt1_req(uint32_t conn_id, const uint8_t *data, unsigned int len);
-
-static struct osmo_prim_hdr *make_conn_resp(struct osmo_scu_connect_param *param)
-{
- struct msgb *msg = msgb_alloc(1024, "conn_resp");
- struct osmo_scu_prim *prim;
-
- prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
- osmo_prim_init(&prim->oph, SCCP_SAP_USER,
- OSMO_SCU_PRIM_N_CONNECT,
- PRIM_OP_RESPONSE, msg);
- memcpy(&prim->u.connect, param, sizeof(prim->u.connect));
- return &prim->oph;
-}
-
-static void ue_ctx_link_invalidated_free(struct ranap_ue_conn_ctx *ue)
-{
- uint32_t conn_id = ue->conn_id;
- global_iu_event(ue, RANAP_IU_EVENT_LINK_INVALIDATED, NULL);
-
- /* A RANAP_IU_EVENT_LINK_INVALIDATED, can lead to a free */
- ue = ue_conn_ctx_find(conn_id);
- if (!ue)
- return;
- if (ue->free_on_release)
- ranap_iu_free_ue(ue);
-}
-
-static void handle_pcstate_ind(struct osmo_ss7_instance *cs7, const struct osmo_scu_pcstate_param *pcst)
-{
- struct osmo_sccp_addr rem_addr;
- struct ranap_iu_rnc *rnc;
- bool connected;
- bool disconnected;
-
- LOGPIU(LOGL_DEBUG, "N-PCSTATE ind: affected_pc=%u=%s sp_status=%s remote_sccp_status=%s\n",
- pcst->affected_pc, osmo_ss7_pointcode_print(cs7, pcst->affected_pc),
- osmo_sccp_sp_status_name(pcst->sp_status),
- osmo_sccp_rem_sccp_status_name(pcst->remote_sccp_status));
-
- osmo_sccp_make_addr_pc_ssn(&rem_addr, pcst->affected_pc, OSMO_SCCP_SSN_RANAP);
-
- /* See if this marks the point code to have become available, or to have been lost.
- *
- * I want to detect two events:
- * - connection event (both indicators say PC is reachable).
- * - disconnection event (at least one indicator says the PC is not reachable).
- *
- * There are two separate incoming indicators with various possible values -- the incoming events can be:
- *
- * - neither connection nor disconnection indicated -- just indicating congestion
- * connected == false, disconnected == false --> do nothing.
- * - both incoming values indicate that we are connected
- * --> trigger connected
- * - both indicate we are disconnected
- * --> trigger disconnected
- * - one value indicates 'connected', the other indicates 'disconnected'
- * --> trigger disconnected
- *
- * Congestion could imply that we're connected, but it does not indicate
- * that a PC's reachability changed, so no need to trigger on that.
- */
- connected = false;
- disconnected = false;
-
- switch (pcst->sp_status) {
- case OSMO_SCCP_SP_S_ACCESSIBLE:
- connected = true;
- break;
- case OSMO_SCCP_SP_S_INACCESSIBLE:
- disconnected = true;
- break;
- default:
- case OSMO_SCCP_SP_S_CONGESTED:
- /* Neither connecting nor disconnecting */
- break;
- }
-
- switch (pcst->remote_sccp_status) {
- case OSMO_SCCP_REM_SCCP_S_AVAILABLE:
- if (!disconnected)
- connected = true;
- break;
- case OSMO_SCCP_REM_SCCP_S_UNAVAILABLE_UNKNOWN:
- case OSMO_SCCP_REM_SCCP_S_UNEQUIPPED:
- case OSMO_SCCP_REM_SCCP_S_INACCESSIBLE:
- disconnected = true;
- connected = false;
- break;
- default:
- case OSMO_SCCP_REM_SCCP_S_CONGESTED:
- /* Neither connecting nor disconnecting */
- break;
- }
-
- if (disconnected) {
- /* A previously usable RNC has disconnected. Signal to user that all related ue_ctx are invalid. */
- llist_for_each_entry(rnc, &rnc_list, entry) {
- struct ranap_ue_conn_ctx *ue_ctx, *ue_ctx_tmp;
- if (osmo_sccp_addr_cmp(&rnc->sccp_addr, &rem_addr, OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC))
- continue;
- LOGPIU(LOGL_NOTICE,
- "RNC %s now unreachable: N-PCSTATE ind: pc=%u=%s sp_status=%s remote_sccp_status=%s\n",
- osmo_rnc_id_name(&rnc->rnc_id),
- pcst->affected_pc, osmo_ss7_pointcode_print(cs7, pcst->affected_pc),
- osmo_sccp_sp_status_name(pcst->sp_status),
- osmo_sccp_rem_sccp_status_name(pcst->remote_sccp_status));
- llist_for_each_entry_safe(ue_ctx, ue_ctx_tmp, &ue_conn_ctx_list, list) {
- if (ue_ctx->rnc != rnc)
- continue;
- ue_ctx_link_invalidated_free(ue_ctx);
- }
- /* TODO: ideally we'd have some event to submit to upper
- * layer to inform about peer availability change... */
- }
- } else if (connected) {
- llist_for_each_entry(rnc, &rnc_list, entry) {
- if (osmo_sccp_addr_cmp(&rnc->sccp_addr, &rem_addr, OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC))
- continue;
- LOGPIU(LOGL_NOTICE,
- "RNC %s now available: N-PCSTATE ind: pc=%u=%s sp_status=%s remote_sccp_status=%s\n",
- osmo_rnc_id_name(&rnc->rnc_id),
- pcst->affected_pc, osmo_ss7_pointcode_print(cs7, pcst->affected_pc),
- osmo_sccp_sp_status_name(pcst->sp_status),
- osmo_sccp_rem_sccp_status_name(pcst->remote_sccp_status));
- /* TODO: ideally we'd have some event to submit to upper
- * layer to inform about peer availability change... */
- }
- }
-}
-
-static int sccp_sap_up(struct osmo_prim_hdr *oph, void *_scu)
-{
- struct osmo_sccp_user *scu = _scu;
- struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph;
- struct osmo_sccp_instance *sccp = osmo_sccp_get_sccp(scu);
- struct osmo_prim_hdr *resp = NULL;
- int rc = -1;
- struct ranap_ue_conn_ctx *ue;
- struct new_ue_conn_ctx new_ctx = {};
- uint32_t conn_id;
-
- LOGPIU(LOGL_DEBUG, "sccp_sap_up(%s)\n", osmo_scu_prim_name(oph));
-
- switch (OSMO_PRIM_HDR(oph)) {
- case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM):
- /* confirmation of outbound connection */
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION):
- /* indication of new inbound connection request*/
- conn_id = prim->u.connect.conn_id;
- LOGPIU(LOGL_DEBUG, "N-CONNECT.ind(X->%u)\n", conn_id);
-
- new_ctx.sccp_addr = prim->u.connect.calling_addr;
- new_ctx.conn_id = conn_id;
-
- /* first ensure the local SCCP socket is ACTIVE */
- resp = make_conn_resp(&prim->u.connect);
- osmo_sccp_user_sap_down(scu, resp);
- /* then handle the RANAP payload */
- if (/* prim->u.connect.called_addr.ssn != OSMO_SCCP_SSN_RANAP || */
- !msgb_l2(oph->msg) || msgb_l2len(oph->msg) == 0) {
- LOGPIU(LOGL_DEBUG,
- "Received N-CONNECT.ind without data\n");
- ue_conn_sccp_addr_add(conn_id, &prim->u.connect.calling_addr);
- } else {
- rc = ranap_cn_rx_co(cn_ranap_handle_co_initial, &new_ctx, msgb_l2(oph->msg), msgb_l2len(oph->msg));
- }
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION):
- /* indication of disconnect */
- conn_id = prim->u.disconnect.conn_id;
- LOGPIU(LOGL_DEBUG, "N-DISCONNECT.ind(%u)\n", conn_id);
-
- ue_conn_sccp_addr_del(conn_id);
- ue = ue_conn_ctx_find(conn_id);
- if (!ue)
- break;
-
- rc = 0;
- if (msgb_l2len(oph->msg) > 0)
- rc = ranap_cn_rx_co(cn_ranap_handle_co, ue, msgb_l2(oph->msg), msgb_l2len(oph->msg));
-
- /* A Iu Release event might be used to free the UE in cn_ranap_handle_co. */
- ue = ue_conn_ctx_find(conn_id);
- if (!ue)
- break;
- ue_ctx_link_invalidated_free(ue);
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION):
- /* connection-oriented data received */
- conn_id = prim->u.data.conn_id;
- LOGPIU(LOGL_DEBUG, "N-DATA.ind(%u, %s)\n", conn_id,
- osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
-
- /* resolve UE context */
- ue = ue_conn_ctx_find(conn_id);
- if (!ue) {
- /* Could be an InitialUE-Message after an empty CR, recreate new_ctx */
- const struct osmo_sccp_addr *sccp_addr = ue_conn_sccp_addr_find(conn_id);
- if (!sccp_addr) {
- LOGPIU(LOGL_NOTICE,
- "N-DATA.ind for unknown conn_id (%u)\n", conn_id);
- break;
- }
- new_ctx.conn_id = conn_id;
- new_ctx.sccp_addr = *sccp_addr;
- ue_conn_sccp_addr_del(conn_id);
- rc = ranap_cn_rx_co(cn_ranap_handle_co_initial, &new_ctx, msgb_l2(oph->msg), msgb_l2len(oph->msg));
- break;
- }
-
- rc = ranap_cn_rx_co(cn_ranap_handle_co, ue, msgb_l2(oph->msg), msgb_l2len(oph->msg));
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
- /* connection-less data received */
- LOGPIU(LOGL_DEBUG, "N-UNITDATA.ind(%s)\n",
- osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
- rc = ranap_cn_rx_cl(cn_ranap_handle_cl, prim, msgb_l2(oph->msg), msgb_l2len(oph->msg));
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_PCSTATE, PRIM_OP_INDICATION):
- handle_pcstate_ind(osmo_sccp_get_ss7(sccp), &prim->u.pcstate);
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_STATE, PRIM_OP_INDICATION):
- LOGPIU(LOGL_DEBUG, "SCCP-User-SAP: Ignoring %s.%s\n",
- osmo_scu_prim_type_name(oph->primitive),
- get_value_string(osmo_prim_op_names, oph->operation));
- break;
- default:
- break;
- }
-
- msgb_free(oph->msg);
- return rc;
-}
-
-int ranap_iu_init(void *ctx, int log_subsystem, const char *sccp_user_name, struct osmo_sccp_instance *sccp,
- ranap_iu_recv_cb_t iu_recv_cb, ranap_iu_event_cb_t iu_event_cb)
-{
- iu_log_subsystem = log_subsystem;
- talloc_iu_ctx = talloc_named_const(ctx, 1, "iu");
- talloc_asn1_ctx = talloc_named_const(talloc_iu_ctx, 1, "asn1");
-
- global_iu_recv_cb = iu_recv_cb;
- global_iu_event_cb = iu_event_cb;
- g_sccp = sccp;
- osmo_sccp_local_addr_by_instance(&g_local_sccp_addr, sccp, OSMO_SCCP_SSN_RANAP);
- g_scu = osmo_sccp_user_bind(g_sccp, sccp_user_name, sccp_sap_up, OSMO_SCCP_SSN_RANAP);
-
- return 0;
-}
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