lynxis lazus has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-iuh/+/40847?usp=email )
Change subject: Drop iu_client - adopted by osmo-sgsn ......................................................................
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; -}
-
lynxis lazus