diff options
Diffstat (limited to 'openbsc/src/gprs/gprs_subscriber.c')
| -rw-r--r-- | openbsc/src/gprs/gprs_subscriber.c | 936 |
1 files changed, 0 insertions, 936 deletions
diff --git a/openbsc/src/gprs/gprs_subscriber.c b/openbsc/src/gprs/gprs_subscriber.c deleted file mode 100644 index d13bd8393..000000000 --- a/openbsc/src/gprs/gprs_subscriber.c +++ /dev/null @@ -1,936 +0,0 @@ -/* 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 <osmocom/gsm/apn.h> -#include <osmocom/core/utils.h> -#include <osmocom/core/logging.h> -#include <openbsc/gprs_subscriber.h> -#include <openbsc/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> -#include <limits.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; - -LLIST_HEAD(_gprs_subscribers); -struct llist_head * const gprs_subscribers = &_gprs_subscribers; - -static int gsup_read_cb(struct 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 = 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 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_bsc_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 = 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 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 = pdp_info->pdp_type; - osmo_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; - - 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); - 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) -{ - 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 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); - 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) - subscr->lac = mmctx->ra.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); - - subscr->flags |= GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING; - - rc = gprs_subscr_location_update(subscr); - 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); - - 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; -} |