| /* 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 <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
| #include <osmocom/gsm/gsup.h> |
| #include <openbsc/gsm_subscriber.h> |
| #include <openbsc/gprs_gsup_client.h> |
| |
| #include <openbsc/sgsn.h> |
| #include <openbsc/gprs_sgsn.h> |
| #include <openbsc/gprs_gmm.h> |
| #include <openbsc/gprs_utils.h> |
| |
| #include <openbsc/debug.h> |
| |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| |
| #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) |
| |
| extern void *tall_bsc_ctx; |
| |
| static int gsup_read_cb(struct gprs_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; |
| |
| if (!sgi->cfg.gsup_server_addr.sin_addr.s_addr) |
| return 0; |
| |
| addr_str = inet_ntoa(sgi->cfg.gsup_server_addr.sin_addr); |
| |
| sgi->gsup_client = gprs_gsup_client_create( |
| 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 gprs_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 gsm_subscriber *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 gsm_subscriber *gprs_subscr_get_or_create(const char *imsi) |
| { |
| struct gsm_subscriber *subscr; |
| |
| subscr = subscr_get_or_create(NULL, imsi); |
| if (!subscr) |
| return NULL; |
| |
| if (!subscr->sgsn_data) |
| subscr->sgsn_data = sgsn_subscriber_data_alloc(subscr); |
| return subscr; |
| } |
| |
| struct gsm_subscriber *gprs_subscr_get_by_imsi(const char *imsi) |
| { |
| return subscr_active_by_imsi(NULL, imsi); |
| } |
| |
| void gprs_subscr_cleanup(struct gsm_subscriber *subscr) |
| { |
| if (subscr->sgsn_data->mm) { |
| 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 gsm_subscriber *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 gsm_subscriber *subscr, |
| struct osmo_gsup_message *gsup_msg) |
| { |
| struct msgb *msg = gprs_gsup_msgb_alloc(); |
| |
| if (strlen(gsup_msg->imsi) == 0 && subscr) |
| strncpy(gsup_msg->imsi, subscr->imsi, sizeof(gsup_msg->imsi) - 1); |
| |
| 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 gprs_gsup_client_send(sgsn->gsup_client, msg); |
| } |
| |
| static int gprs_subscr_tx_gsup_error_reply(struct gsm_subscriber *subscr, |
| struct osmo_gsup_message *gsup_orig, |
| enum gsm48_gmm_cause cause) |
| { |
| struct osmo_gsup_message gsup_reply = {0}; |
| |
| strncpy(gsup_reply.imsi, gsup_orig->imsi, sizeof(gsup_reply.imsi) - 1); |
| 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 gsm_subscriber *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 gsm_subscriber *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 gsm_subscriber *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 gsm_subscriber *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_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 = pdp_info->pdp_type; |
| gprs_apn_to_str(pdp_data->apn_str, |
| pdp_info->apn_enc, pdp_info->apn_enc_len); |
| memcpy(pdp_data->qos_subscribed, pdp_info->qos_enc, pdp_info->qos_enc_len); |
| pdp_data->qos_subscribed_len = pdp_info->qos_enc_len; |
| } |
| } |
| |
| static int gprs_subscr_handle_gsup_upd_loc_res(struct gsm_subscriber *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_isd_req(struct gsm_subscriber *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 gsm_subscriber *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); |
| break; |
| } |
| |
| return -gsup_msg->cause; |
| } |
| |
| static int gprs_subscr_handle_gsup_upd_loc_err(struct gsm_subscriber *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 gsm_subscriber *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 gsm_subscriber *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 gsm_subscriber *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 gsm_subscriber *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 of type 0x%02x\n", 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: |
| LOGGSUBSCRP(LOGL_ERROR, subscr, |
| "Rx GSUP message type %d not yet implemented\n", |
| 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; |
| |
| default: |
| LOGGSUBSCRP(LOGL_ERROR, subscr, |
| "Rx GSUP message type %d not valid at SGSN\n", |
| 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; |
| }; |
| |
| subscr_put(subscr); |
| |
| return rc; |
| } |
| |
| int gprs_subscr_purge(struct gsm_subscriber *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); |
| } |
| |
| int gprs_subscr_query_auth_info(struct gsm_subscriber *subscr) |
| { |
| struct osmo_gsup_message gsup_msg = {0}; |
| |
| LOGGSUBSCRP(LOGL_INFO, subscr, |
| "subscriber auth info is not available\n"); |
| |
| gsup_msg.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST; |
| return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); |
| } |
| |
| int gprs_subscr_location_update(struct gsm_subscriber *subscr) |
| { |
| 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; |
| return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); |
| } |
| |
| void gprs_subscr_update(struct gsm_subscriber *subscr) |
| { |
| LOGGSUBSCRP(LOGL_DEBUG, subscr, "Updating subscriber data\n"); |
| |
| subscr->flags &= ~GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING; |
| subscr->flags &= ~GSM_SUBSCRIBER_FIRST_CONTACT; |
| |
| if (subscr->sgsn_data->mm) |
| sgsn_update_subscriber_data(subscr->sgsn_data->mm); |
| } |
| |
| void gprs_subscr_update_auth_info(struct gsm_subscriber *subscr) |
| { |
| LOGGSUBSCRP(LOGL_DEBUG, subscr, |
| "Updating subscriber authentication info\n"); |
| |
| subscr->flags &= ~GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING; |
| subscr->flags &= ~GSM_SUBSCRIBER_FIRST_CONTACT; |
| |
| if (subscr->sgsn_data->mm) |
| sgsn_update_subscriber_data(subscr->sgsn_data->mm); |
| } |
| |
| struct gsm_subscriber *gprs_subscr_get_or_create_by_mmctx(struct sgsn_mm_ctx *mmctx) |
| { |
| struct gsm_subscriber *subscr = NULL; |
| |
| if (mmctx->subscr) |
| return 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); |
| subscr->flags |= GSM_SUBSCRIBER_FIRST_CONTACT; |
| subscr->flags &= ~GPRS_SUBSCRIBER_ENABLE_PURGE; |
| } |
| |
| if (strcpy(subscr->equipment.imei, mmctx->imei) != 0) { |
| strncpy(subscr->equipment.imei, mmctx->imei, |
| sizeof(subscr->equipment.imei)-1); |
| subscr->equipment.imei[sizeof(subscr->equipment.imei)-1] = 0; |
| } |
| |
| if (subscr->lac != mmctx->ra.lac) |
| subscr->lac = mmctx->ra.lac; |
| |
| subscr->sgsn_data->mm = mmctx; |
| mmctx->subscr = subscr_get(subscr); |
| |
| return subscr; |
| } |
| |
| int gprs_subscr_request_update_location(struct sgsn_mm_ctx *mmctx) |
| { |
| struct gsm_subscriber *subscr = NULL; |
| int rc; |
| |
| LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting subscriber data update\n"); |
| |
| subscr = gprs_subscr_get_or_create_by_mmctx(mmctx); |
| |
| subscr->flags |= GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING; |
| |
| rc = gprs_subscr_location_update(subscr); |
| subscr_put(subscr); |
| return rc; |
| } |
| |
| int gprs_subscr_request_auth_info(struct sgsn_mm_ctx *mmctx) |
| { |
| struct gsm_subscriber *subscr = NULL; |
| int rc; |
| |
| LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting subscriber authentication info\n"); |
| |
| subscr = gprs_subscr_get_or_create_by_mmctx(mmctx); |
| |
| subscr->flags |= GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING; |
| |
| rc = gprs_subscr_query_auth_info(subscr); |
| subscr_put(subscr); |
| return rc; |
| } |