/* MS subscriber data handling */ /* (C) 2014 by sysmocom s.f.m.c. GmbH * (C) 2015 by Holger Hans Peter Freyther * * 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 . * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define SGSN_SUBSCR_MAX_RETRIES 3 #define SGSN_SUBSCR_RETRY_INTERVAL 10 #define LOGGSUPP(level, gsup, fmt, args...) \ LOGP(DGPRS, level, "GSUP(%s) " fmt, \ (gsup)->imsi, \ ## args) LLIST_HEAD(_gprs_subscribers); struct llist_head * const gprs_subscribers = &_gprs_subscribers; static int gsup_read_cb(struct osmo_gsup_client *gsupc, struct msgb *msg); /* TODO: Some functions are specific to the SGSN, but this file is more general * (it has gprs_* name). Either move these functions elsewhere, split them and * move a part, or replace the gprs_ prefix by sgsn_. The applies to * gprs_subscr_init, gsup_read_cb, and gprs_subscr_tx_gsup_message. */ int gprs_subscr_init(struct sgsn_instance *sgi) { const char *addr_str; struct ipaccess_unit *ipa_dev; if (!sgi->cfg.gsup_server_addr.sin_addr.s_addr) return 0; addr_str = inet_ntoa(sgi->cfg.gsup_server_addr.sin_addr); ipa_dev = talloc_zero(sgi, struct ipaccess_unit); ipa_dev->unit_name = "SGSN"; ipa_dev->serno = sgi->cfg.sgsn_ipa_name; /* NULL unless configured via VTY */ sgi->gsup_client = osmo_gsup_client_create2( sgi, ipa_dev, addr_str, sgi->cfg.gsup_server_port, &gsup_read_cb, &sgi->cfg.oap); if (!sgi->gsup_client) return -1; return 1; } static int gsup_read_cb(struct osmo_gsup_client *gsupc, struct msgb *msg) { int rc; rc = gprs_subscr_rx_gsup_message(msg); msgb_free(msg); if (rc < 0) return -1; return rc; } int gprs_subscr_purge(struct gprs_subscr *subscr); static struct sgsn_subscriber_data *sgsn_subscriber_data_alloc(void *ctx) { struct sgsn_subscriber_data *sdata; int idx; sdata = talloc_zero(ctx, struct sgsn_subscriber_data); sdata->error_cause = SGSN_ERROR_CAUSE_NONE; for (idx = 0; idx < ARRAY_SIZE(sdata->auth_triplets); idx++) sdata->auth_triplets[idx].key_seq = GSM_KEY_SEQ_INVAL; INIT_LLIST_HEAD(&sdata->pdp_list); return sdata; } struct sgsn_subscriber_pdp_data* sgsn_subscriber_pdp_data_alloc( struct sgsn_subscriber_data *sdata) { struct sgsn_subscriber_pdp_data* pdata; pdata = talloc_zero(sdata, struct sgsn_subscriber_pdp_data); llist_add_tail(&pdata->list, &sdata->pdp_list); return pdata; } struct gprs_subscr *gprs_subscr_get_by_imsi(const char *imsi) { struct gprs_subscr *gsub; if (!imsi || !*imsi) return NULL; llist_for_each_entry(gsub, gprs_subscribers, entry) { if (!strcmp(gsub->imsi, imsi)) return gprs_subscr_get(gsub); } return NULL; } static struct gprs_subscr *gprs_subscr_alloc(void) { struct gprs_subscr *gsub; gsub = talloc_zero(tall_sgsn_ctx, struct gprs_subscr); if (!gsub) return NULL; llist_add_tail(&gsub->entry, gprs_subscribers); gsub->use_count = 1; gsub->tmsi = GSM_RESERVED_TMSI; return gsub; } struct gprs_subscr *gprs_subscr_get_or_create(const char *imsi) { struct gprs_subscr *gsub; gsub = gprs_subscr_get_by_imsi(imsi); if (!gsub) { gsub = gprs_subscr_alloc(); if (!gsub) return NULL; osmo_strlcpy(gsub->imsi, imsi, sizeof(gsub->imsi)); } if (!gsub->sgsn_data) gsub->sgsn_data = sgsn_subscriber_data_alloc(gsub); return gsub; } void gprs_subscr_cleanup(struct gprs_subscr *subscr) { if (subscr->sgsn_data->mm) { gprs_subscr_put(subscr->sgsn_data->mm->subscr); subscr->sgsn_data->mm->subscr = NULL; subscr->sgsn_data->mm = NULL; } if (subscr->flags & GPRS_SUBSCRIBER_ENABLE_PURGE) { gprs_subscr_purge(subscr); subscr->flags &= ~GPRS_SUBSCRIBER_ENABLE_PURGE; } } void gprs_subscr_cancel(struct gprs_subscr *subscr) { subscr->authorized = 0; subscr->flags |= GPRS_SUBSCRIBER_CANCELLED; subscr->flags &= ~GPRS_SUBSCRIBER_ENABLE_PURGE; gprs_subscr_update(subscr); gprs_subscr_cleanup(subscr); } static int gprs_subscr_tx_gsup_message(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { struct msgb *msg = osmo_gsup_client_msgb_alloc(); if (strlen(gsup_msg->imsi) == 0 && subscr) osmo_strlcpy(gsup_msg->imsi, subscr->imsi, sizeof(gsup_msg->imsi)); gsup_msg->cn_domain = OSMO_GSUP_CN_DOMAIN_PS; osmo_gsup_encode(msg, gsup_msg); LOGGSUBSCRP(LOGL_INFO, subscr, "Sending GSUP, will send: %s\n", msgb_hexdump(msg)); if (!sgsn->gsup_client) { msgb_free(msg); return -ENOTSUP; } return osmo_gsup_client_send(sgsn->gsup_client, msg); } static int gprs_subscr_tx_gsup_error_reply(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_orig, enum gsm48_gmm_cause cause) { struct osmo_gsup_message gsup_reply = {0}; osmo_strlcpy(gsup_reply.imsi, gsup_orig->imsi, sizeof(gsup_reply.imsi)); gsup_reply.cause = cause; gsup_reply.message_type = OSMO_GSUP_TO_MSGT_ERROR(gsup_orig->message_type); return gprs_subscr_tx_gsup_message(subscr, &gsup_reply); } static int gprs_subscr_handle_gsup_auth_res(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { unsigned idx; struct sgsn_subscriber_data *sdata = subscr->sgsn_data; LOGGSUBSCRP(LOGL_INFO, subscr, "Got SendAuthenticationInfoResult, num_auth_vectors = %zu\n", gsup_msg->num_auth_vectors); if (gsup_msg->num_auth_vectors > 0) { memset(sdata->auth_triplets, 0, sizeof(sdata->auth_triplets)); for (idx = 0; idx < ARRAY_SIZE(sdata->auth_triplets); idx++) sdata->auth_triplets[idx].key_seq = GSM_KEY_SEQ_INVAL; } for (idx = 0; idx < gsup_msg->num_auth_vectors; idx++) { size_t key_seq = idx; LOGGSUBSCRP(LOGL_DEBUG, subscr, "Adding auth tuple, cksn = %zu\n", key_seq); if (key_seq >= ARRAY_SIZE(sdata->auth_triplets)) { LOGGSUBSCRP(LOGL_NOTICE, subscr, "Skipping auth triplet with invalid cksn %zu\n", key_seq); continue; } sdata->auth_triplets[key_seq].vec = gsup_msg->auth_vectors[idx]; sdata->auth_triplets[key_seq].key_seq = key_seq; } sdata->auth_triplets_updated = 1; sdata->error_cause = SGSN_ERROR_CAUSE_NONE; gprs_subscr_update_auth_info(subscr); return 0; } static int gprs_subscr_pdp_data_clear(struct gprs_subscr *subscr) { struct sgsn_subscriber_pdp_data *pdp, *pdp2; int count = 0; llist_for_each_entry_safe(pdp, pdp2, &subscr->sgsn_data->pdp_list, list) { llist_del(&pdp->list); talloc_free(pdp); count += 1; } return count; } static struct sgsn_subscriber_pdp_data *gprs_subscr_pdp_data_get_by_id( struct gprs_subscr *subscr, unsigned context_id) { struct sgsn_subscriber_pdp_data *pdp; llist_for_each_entry(pdp, &subscr->sgsn_data->pdp_list, list) { if (pdp->context_id == context_id) return pdp; } return NULL; } static void gprs_subscr_gsup_insert_data(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { struct sgsn_subscriber_data *sdata = subscr->sgsn_data; unsigned idx; int rc; if (gsup_msg->msisdn_enc) { if (gsup_msg->msisdn_enc_len > sizeof(sdata->msisdn)) { LOGP(DGPRS, LOGL_ERROR, "MSISDN too long (%zu)\n", gsup_msg->msisdn_enc_len); sdata->msisdn_len = 0; } else { memcpy(sdata->msisdn, gsup_msg->msisdn_enc, gsup_msg->msisdn_enc_len); sdata->msisdn_len = gsup_msg->msisdn_enc_len; } } if (gsup_msg->hlr_enc) { if (gsup_msg->hlr_enc_len > sizeof(sdata->hlr)) { LOGP(DGPRS, LOGL_ERROR, "HLR-Number too long (%zu)\n", gsup_msg->hlr_enc_len); sdata->hlr_len = 0; } else { memcpy(sdata->hlr, gsup_msg->hlr_enc, gsup_msg->hlr_enc_len); sdata->hlr_len = gsup_msg->hlr_enc_len; } } if (gsup_msg->pdp_charg_enc && gsup_msg->pdp_charg_enc_len >= sizeof(sdata->pdp_charg)) { memcpy(&sdata->pdp_charg, gsup_msg->pdp_charg_enc, sizeof(sdata->pdp_charg)); sdata->has_pdp_charg = 1; } else { sdata->has_pdp_charg = 0; } if (gsup_msg->pdp_info_compl) { rc = gprs_subscr_pdp_data_clear(subscr); if (rc > 0) LOGP(DGPRS, LOGL_INFO, "Cleared existing PDP info\n"); } for (idx = 0; idx < gsup_msg->num_pdp_infos; idx++) { struct osmo_gsup_pdp_info *pdp_info = &gsup_msg->pdp_infos[idx]; size_t ctx_id = pdp_info->context_id; struct sgsn_subscriber_pdp_data *pdp_data; if (pdp_info->apn_enc_len >= sizeof(pdp_data->apn_str)-1) { LOGGSUBSCRP(LOGL_ERROR, subscr, "APN too long, context id = %zu, APN = %s\n", ctx_id, osmo_hexdump(pdp_info->apn_enc, pdp_info->apn_enc_len)); continue; } if (pdp_info->qos_enc_len > sizeof(pdp_data->qos_subscribed)) { LOGGSUBSCRP(LOGL_ERROR, subscr, "QoS info too long (%zu)\n", pdp_info->qos_enc_len); continue; } LOGGSUBSCRP(LOGL_INFO, subscr, "Will set PDP info, context id = %zu, APN = %s\n", ctx_id, osmo_hexdump(pdp_info->apn_enc, pdp_info->apn_enc_len)); /* Set PDP info [ctx_id] */ pdp_data = gprs_subscr_pdp_data_get_by_id(subscr, ctx_id); if (!pdp_data) { pdp_data = sgsn_subscriber_pdp_data_alloc(subscr->sgsn_data); pdp_data->context_id = ctx_id; } OSMO_ASSERT(pdp_data != NULL); pdp_data->pdp_type_org = pdp_info->pdp_type_org; pdp_data->pdp_type_nr = pdp_info->pdp_type_nr; osmo_apn_to_str(pdp_data->apn_str, pdp_info->apn_enc, pdp_info->apn_enc_len); if (pdp_info->qos_enc) { memcpy(&pdp_data->qos_subscribed[0], pdp_info->qos_enc, pdp_info->qos_enc_len); } pdp_data->qos_subscribed_len = pdp_info->qos_enc_len; if (pdp_info->pdp_charg_enc && pdp_info->pdp_charg_enc_len >= sizeof(pdp_data->pdp_charg)) { memcpy(&pdp_data->pdp_charg, pdp_info->pdp_charg_enc, sizeof(pdp_data->pdp_charg)); pdp_data->has_pdp_charg = 1; } else { pdp_data->has_pdp_charg = 0; } } } static int gprs_subscr_handle_gsup_upd_loc_res(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { /* contrary to MAP, we allow piggy-backing subscriber data onto * the UPDATE LOCATION RESULT, and don't mandate the use of a * separate nested INSERT SUBSCRIBER DATA transaction */ gprs_subscr_gsup_insert_data(subscr, gsup_msg); subscr->authorized = 1; subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; subscr->flags |= GPRS_SUBSCRIBER_ENABLE_PURGE; gprs_subscr_update(subscr); return 0; } static int gprs_subscr_handle_gsup_dsd_req(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { struct osmo_gsup_message gsup_reply = {0}; if (gsup_msg->cn_domain != OSMO_GSUP_CN_DOMAIN_PS) { LOGGSUBSCRP(LOGL_ERROR, subscr, "Rx GSUP message %s not supported for CS\n", osmo_gsup_message_type_name(gsup_msg->message_type)); gsup_reply.cause = GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL; gsup_reply.message_type = OSMO_GSUP_MSGT_DELETE_DATA_ERROR; } else { gsm0408_gprs_access_cancelled(subscr->sgsn_data->mm, GMM_CAUSE_GPRS_NOTALLOWED); gsup_reply.message_type = OSMO_GSUP_MSGT_DELETE_DATA_RESULT; } return gprs_subscr_tx_gsup_message(subscr, &gsup_reply); } static int gprs_subscr_handle_gsup_isd_req(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { struct osmo_gsup_message gsup_reply = {0}; gprs_subscr_gsup_insert_data(subscr, gsup_msg); subscr->authorized = 1; subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; subscr->flags |= GPRS_SUBSCRIBER_ENABLE_PURGE; gprs_subscr_update(subscr); gsup_reply.message_type = OSMO_GSUP_MSGT_INSERT_DATA_RESULT; return gprs_subscr_tx_gsup_message(subscr, &gsup_reply); } static int check_cause(int cause) { switch (cause) { case GMM_CAUSE_IMSI_UNKNOWN ... GMM_CAUSE_ILLEGAL_ME: case GMM_CAUSE_GPRS_NOTALLOWED ... GMM_CAUSE_NO_GPRS_PLMN: return EACCES; case GMM_CAUSE_MSC_TEMP_NOTREACH ... GMM_CAUSE_CONGESTION: return EHOSTUNREACH; case GMM_CAUSE_SEM_INCORR_MSG ... GMM_CAUSE_PROTO_ERR_UNSPEC: default: return EINVAL; } } static int gprs_subscr_handle_gsup_auth_err(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { unsigned idx; struct sgsn_subscriber_data *sdata = subscr->sgsn_data; int cause_err; cause_err = check_cause(gsup_msg->cause); LOGGSUBSCRP(LOGL_DEBUG, subscr, "Send authentication info has failed with cause %d, " "handled as: %s\n", gsup_msg->cause, strerror(cause_err)); switch (cause_err) { case EACCES: LOGGSUBSCRP(LOGL_NOTICE, subscr, "GPRS send auth info req failed, access denied, " "GMM cause = '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); /* Clear auth tuples */ memset(sdata->auth_triplets, 0, sizeof(sdata->auth_triplets)); for (idx = 0; idx < ARRAY_SIZE(sdata->auth_triplets); idx++) sdata->auth_triplets[idx].key_seq = GSM_KEY_SEQ_INVAL; subscr->authorized = 0; sdata->error_cause = gsup_msg->cause; gprs_subscr_update_auth_info(subscr); break; case EHOSTUNREACH: LOGGSUBSCRP(LOGL_NOTICE, subscr, "GPRS send auth info req failed, GMM cause = '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); sdata->error_cause = gsup_msg->cause; gprs_subscr_update_auth_info(subscr); break; default: case EINVAL: LOGGSUBSCRP(LOGL_ERROR, subscr, "GSUP protocol remote error, GMM cause = '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); sdata->error_cause = gsup_msg->cause; break; } return -gsup_msg->cause; } static int gprs_subscr_handle_gsup_upd_loc_err(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { int cause_err; cause_err = check_cause(gsup_msg->cause); LOGGSUBSCRP(LOGL_DEBUG, subscr, "Update location has failed with cause %d, handled as: %s\n", gsup_msg->cause, strerror(cause_err)); switch (cause_err) { case EACCES: LOGGSUBSCRP(LOGL_NOTICE, subscr, "GPRS update location failed, access denied, " "GMM cause = '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); subscr->authorized = 0; subscr->sgsn_data->error_cause = gsup_msg->cause; gprs_subscr_update_auth_info(subscr); break; case EHOSTUNREACH: LOGGSUBSCRP(LOGL_NOTICE, subscr, "GPRS update location failed, GMM cause = '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); subscr->sgsn_data->error_cause = gsup_msg->cause; gprs_subscr_update_auth_info(subscr); break; default: case EINVAL: LOGGSUBSCRP(LOGL_ERROR, subscr, "GSUP protocol remote error, GMM cause = '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); break; } return -gsup_msg->cause; } static int gprs_subscr_handle_gsup_purge_no_subscr( struct osmo_gsup_message *gsup_msg) { if (OSMO_GSUP_IS_MSGT_ERROR(gsup_msg->message_type)) { LOGGSUPP(LOGL_NOTICE, gsup_msg, "Purge MS has failed with cause '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); return -gsup_msg->cause; } LOGGSUPP(LOGL_INFO, gsup_msg, "Completing purge MS\n"); return 0; } static int gprs_subscr_handle_gsup_purge_res(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { LOGGSUBSCRP(LOGL_INFO, subscr, "Completing purge MS\n"); /* Force silent cancellation */ subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; gprs_subscr_cancel(subscr); return 0; } static int gprs_subscr_handle_gsup_purge_err(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { LOGGSUBSCRP(LOGL_NOTICE, subscr, "Purge MS has failed with cause '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); /* In GSM 09.02, 19.1.4.4, the text and the SDL diagram imply that * the subscriber data is not removed if the request has failed. On the * other hand, keeping the subscriber data in either error case * (subscriber unknown, syntactical message error, connection error) * doesn't seem to give any advantage, since the data will be restored * on the next Attach Request anyway. * This approach ensures, that the subscriber record will not stick if * an error happens. */ /* TODO: Check whether this behaviour is acceptable and either just * remove this TODO-notice or change the implementation to not delete * the subscriber data (eventually resetting the ENABLE_PURGE flag and * restarting the expiry timer based on the cause). * * Subscriber Unknown: cancel subscr * Temporary network problems: do nothing (handled by timer based retry) * Message problems (syntax, nyi, ...): cancel subscr (retry won't help) */ gprs_subscr_handle_gsup_purge_res(subscr, gsup_msg); return -gsup_msg->cause; } static int gprs_subscr_handle_loc_cancel_req(struct gprs_subscr *subscr, struct osmo_gsup_message *gsup_msg) { struct osmo_gsup_message gsup_reply = {0}; int is_update_procedure = !gsup_msg->cancel_type || gsup_msg->cancel_type == OSMO_GSUP_CANCEL_TYPE_UPDATE; LOGGSUBSCRP(LOGL_INFO, subscr, "Cancelling MS subscriber (%s)\n", is_update_procedure ? "update procedure" : "subscription withdraw"); gsup_reply.message_type = OSMO_GSUP_MSGT_LOCATION_CANCEL_RESULT; gprs_subscr_tx_gsup_message(subscr, &gsup_reply); if (is_update_procedure) subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; else /* Since a withdraw cause is not specified, just abort the * current attachment. The following re-attachment should then * be rejected with a proper cause value. */ subscr->sgsn_data->error_cause = GMM_CAUSE_IMPL_DETACHED; gprs_subscr_cancel(subscr); return 0; } static int gprs_subscr_handle_unknown_imsi(struct osmo_gsup_message *gsup_msg) { if (OSMO_GSUP_IS_MSGT_REQUEST(gsup_msg->message_type)) { gprs_subscr_tx_gsup_error_reply(NULL, gsup_msg, GMM_CAUSE_IMSI_UNKNOWN); LOGP(DGPRS, LOGL_NOTICE, "Unknown IMSI %s, discarding GSUP request " "of type 0x%02x\n", gsup_msg->imsi, gsup_msg->message_type); } else if (OSMO_GSUP_IS_MSGT_ERROR(gsup_msg->message_type)) { LOGP(DGPRS, LOGL_NOTICE, "Unknown IMSI %s, discarding GSUP error " "of type 0x%02x, cause '%s' (%d)\n", gsup_msg->imsi, gsup_msg->message_type, get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), gsup_msg->cause); } else { LOGP(DGPRS, LOGL_NOTICE, "Unknown IMSI %s, discarding GSUP response " "of type 0x%02x\n", gsup_msg->imsi, gsup_msg->message_type); } return -GMM_CAUSE_IMSI_UNKNOWN; } int gprs_subscr_rx_gsup_message(struct msgb *msg) { uint8_t *data = msgb_l2(msg); size_t data_len = msgb_l2len(msg); int rc = 0; struct osmo_gsup_message gsup_msg = {0}; struct gprs_subscr *subscr; rc = osmo_gsup_decode(data, data_len, &gsup_msg); if (rc < 0) { LOGP(DGPRS, LOGL_ERROR, "decoding GSUP message fails with error '%s' (%d)\n", get_value_string(gsm48_gmm_cause_names, -rc), -rc); return rc; } if (!gsup_msg.imsi[0]) { LOGP(DGPRS, LOGL_ERROR, "Missing IMSI in GSUP message\n"); if (OSMO_GSUP_IS_MSGT_REQUEST(gsup_msg.message_type)) gprs_subscr_tx_gsup_error_reply(NULL, &gsup_msg, GMM_CAUSE_INV_MAND_INFO); return -GMM_CAUSE_INV_MAND_INFO; } if (!gsup_msg.cause && OSMO_GSUP_IS_MSGT_ERROR(gsup_msg.message_type)) gsup_msg.cause = GMM_CAUSE_NET_FAIL; subscr = gprs_subscr_get_by_imsi(gsup_msg.imsi); if (!subscr) { switch (gsup_msg.message_type) { case OSMO_GSUP_MSGT_PURGE_MS_RESULT: case OSMO_GSUP_MSGT_PURGE_MS_ERROR: return gprs_subscr_handle_gsup_purge_no_subscr(&gsup_msg); default: return gprs_subscr_handle_unknown_imsi(&gsup_msg); } } LOGGSUBSCRP(LOGL_INFO, subscr, "Received GSUP message %s\n", osmo_gsup_message_type_name(gsup_msg.message_type)); switch (gsup_msg.message_type) { case OSMO_GSUP_MSGT_LOCATION_CANCEL_REQUEST: rc = gprs_subscr_handle_loc_cancel_req(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: rc = gprs_subscr_handle_gsup_auth_res(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR: rc = gprs_subscr_handle_gsup_auth_err(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: rc = gprs_subscr_handle_gsup_upd_loc_res(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_UPDATE_LOCATION_ERROR: rc = gprs_subscr_handle_gsup_upd_loc_err(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_PURGE_MS_ERROR: rc = gprs_subscr_handle_gsup_purge_err(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_PURGE_MS_RESULT: rc = gprs_subscr_handle_gsup_purge_res(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: rc = gprs_subscr_handle_gsup_isd_req(subscr, &gsup_msg); break; case OSMO_GSUP_MSGT_DELETE_DATA_REQUEST: rc = gprs_subscr_handle_gsup_dsd_req(subscr, &gsup_msg); break; default: LOGGSUBSCRP(LOGL_ERROR, subscr, "Rx GSUP message %s not valid at SGSN\n", osmo_gsup_message_type_name(gsup_msg.message_type)); if (OSMO_GSUP_IS_MSGT_REQUEST(gsup_msg.message_type)) gprs_subscr_tx_gsup_error_reply( subscr, &gsup_msg, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); rc = -GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL; break; }; gprs_subscr_put(subscr); return rc; } int gprs_subscr_purge(struct gprs_subscr *subscr) { struct sgsn_subscriber_data *sdata = subscr->sgsn_data; struct osmo_gsup_message gsup_msg = {0}; LOGGSUBSCRP(LOGL_INFO, subscr, "purging MS subscriber\n"); gsup_msg.message_type = OSMO_GSUP_MSGT_PURGE_MS_REQUEST; /* Provide the HLR number in case it is known */ gsup_msg.hlr_enc_len = sdata->hlr_len; gsup_msg.hlr_enc = sdata->hlr; return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); } static int gprs_subscr_query_auth_info(struct gprs_subscr *subscr, const uint8_t *auts, const uint8_t *auts_rand) { struct osmo_gsup_message gsup_msg = {0}; /* Make sure we have a complete resync or clearly no resync. */ OSMO_ASSERT((auts != NULL) == (auts_rand != NULL)); LOGGSUBSCRP(LOGL_INFO, subscr, "requesting auth info%s\n", auts ? " with AUTS (UMTS Resynch)" : ""); gsup_msg.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST; gsup_msg.auts = auts; gsup_msg.rand = auts_rand; return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); } int gprs_subscr_location_update(struct gprs_subscr *subscr, enum sgsn_ran_type ran_type) { struct osmo_gsup_message gsup_msg = {0}; LOGGSUBSCRP(LOGL_INFO, subscr, "subscriber data is not available\n"); gsup_msg.message_type = OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST; switch (ran_type) { case MM_CTX_T_GERAN_Gb: gsup_msg.current_rat_type = OSMO_RAT_GERAN_A; break; case MM_CTX_T_UTRAN_Iu: gsup_msg.current_rat_type = OSMO_RAT_UTRAN_IU; break; default: break; } return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); } void gprs_subscr_update(struct gprs_subscr *subscr) { LOGGSUBSCRP(LOGL_DEBUG, subscr, "Updating subscriber data\n"); subscr->flags &= ~GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING; subscr->flags &= ~GPRS_SUBSCRIBER_FIRST_CONTACT; if (subscr->sgsn_data->mm) sgsn_update_subscriber_data(subscr->sgsn_data->mm); } void gprs_subscr_update_auth_info(struct gprs_subscr *subscr) { LOGGSUBSCRP(LOGL_DEBUG, subscr, "Updating subscriber authentication info\n"); subscr->flags &= ~GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING; subscr->flags &= ~GPRS_SUBSCRIBER_FIRST_CONTACT; if (subscr->sgsn_data->mm) sgsn_update_subscriber_data(subscr->sgsn_data->mm); } struct gprs_subscr *gprs_subscr_get_or_create_by_mmctx(struct sgsn_mm_ctx *mmctx) { struct gprs_subscr *subscr = NULL; if (mmctx->subscr) return gprs_subscr_get(mmctx->subscr); if (mmctx->imsi[0]) subscr = gprs_subscr_get_by_imsi(mmctx->imsi); if (!subscr) { subscr = gprs_subscr_get_or_create(mmctx->imsi); if (!subscr) return NULL; subscr->flags |= GPRS_SUBSCRIBER_FIRST_CONTACT; subscr->flags &= ~GPRS_SUBSCRIBER_ENABLE_PURGE; } osmo_strlcpy(subscr->imei, mmctx->imei, sizeof(subscr->imei)); if (subscr->lac != mmctx->ra.lac.lac) subscr->lac = mmctx->ra.lac.lac; subscr->sgsn_data->mm = mmctx; mmctx->subscr = gprs_subscr_get(subscr); return subscr; } int gprs_subscr_request_update_location(struct sgsn_mm_ctx *mmctx) { struct gprs_subscr *subscr = NULL; int rc; LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting subscriber data update\n"); subscr = gprs_subscr_get_or_create_by_mmctx(mmctx); if (!subscr) return -ENOMEM; subscr->flags |= GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING; rc = gprs_subscr_location_update(subscr, mmctx->ran_type); gprs_subscr_put(subscr); return rc; } /*! \brief Send Update Auth Info request via GSUP, with or without resync. * \param[in] mmctx MM context to request authentication tuples for. * \param[in] auts 14 octet AUTS token for UMTS resync, or NULL. * \param[in] auts_rand 16 octet Random token for UMTS resync, or NULL. * In case of normal Authentication Info request, both \a auts and \a auts_rand * must be NULL. For resync, both must be non-NULL. */ int gprs_subscr_request_auth_info(struct sgsn_mm_ctx *mmctx, const uint8_t *auts, const uint8_t *auts_rand) { struct gprs_subscr *subscr = NULL; int rc; LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting subscriber authentication info\n"); subscr = gprs_subscr_get_or_create_by_mmctx(mmctx); if (!subscr) return -ENOMEM; subscr->flags |= GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING; rc = gprs_subscr_query_auth_info(subscr, auts, auts_rand); gprs_subscr_put(subscr); return rc; } static void gprs_subscr_free(struct gprs_subscr *gsub) { llist_del(&gsub->entry); talloc_free(gsub); } struct gprs_subscr *_gprs_subscr_get(struct gprs_subscr *gsub, const char *file, int line) { OSMO_ASSERT(gsub->use_count < INT_MAX); gsub->use_count++; LOGPSRC(DREF, LOGL_DEBUG, file, line, "subscr %s usage increases to: %d\n", gsub->imsi, gsub->use_count); return gsub; } struct gprs_subscr *_gprs_subscr_put(struct gprs_subscr *gsub, const char *file, int line) { gsub->use_count--; LOGPSRC(DREF, gsub->use_count >= 0? LOGL_DEBUG : LOGL_ERROR, file, line, "subscr %s usage decreases to: %d%s\n", gsub->imsi, gsub->use_count, gsub->keep_in_ram? ", keep-in-ram flag is set" : ""); if (gsub->use_count > 0) return gsub; if (gsub->keep_in_ram) return gsub; gprs_subscr_free(gsub); return NULL; }