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-rw-r--r--src/libvlr/vlr.c1112
1 files changed, 0 insertions, 1112 deletions
diff --git a/src/libvlr/vlr.c b/src/libvlr/vlr.c
deleted file mode 100644
index d95d1b7ec..000000000
--- a/src/libvlr/vlr.c
+++ /dev/null
@@ -1,1112 +0,0 @@
-/* Osmocom Visitor Location Register (VLR) code base */
-
-/* (C) 2016 by Harald Welte <laforge@gnumonks.org>
- *
- * 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/core/linuxlist.h>
-#include <osmocom/core/fsm.h>
-#include <osmocom/core/utils.h>
-#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
-#include <osmocom/gsm/gsup.h>
-#include <osmocom/gsm/apn.h>
-#include <openbsc/gsm_subscriber.h>
-#include <openbsc/gsup_client.h>
-#include <openbsc/vlr.h>
-#include <openbsc/gprs_sgsn.h>
-#include <openbsc/gprs_utils.h>
-#include <openbsc/debug.h>
-
-#include <openssl/rand.h>
-
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <limits.h>
-
-#include "vlr_core.h"
-#include "vlr_auth_fsm.h"
-#include "vlr_lu_fsm.h"
-#include "vlr_access_req_fsm.h"
-
-#define SGSN_SUBSCR_MAX_RETRIES 3
-#define SGSN_SUBSCR_RETRY_INTERVAL 10
-
-/***********************************************************************
- * Convenience functions
- ***********************************************************************/
-
-const struct value_string vlr_ciph_names[] = {
- OSMO_VALUE_STRING(VLR_CIPH_NONE),
- OSMO_VALUE_STRING(VLR_CIPH_A5_1),
- OSMO_VALUE_STRING(VLR_CIPH_A5_2),
- OSMO_VALUE_STRING(VLR_CIPH_A5_3),
- { 0, NULL }
-};
-
-uint32_t vlr_timer(struct vlr_instance *vlr, uint32_t timer)
-{
- uint32_t tidx = 0xffffffff;
-
- switch (timer) {
- case 3270:
- tidx = VLR_T_3270;
- break;
- case 3260:
- tidx = VLR_T_3260;
- break;
- case 3250:
- tidx = VLR_T_3250;
- break;
- }
-
- OSMO_ASSERT(tidx < sizeof(vlr->cfg.timer));
- return vlr->cfg.timer[tidx];
-}
-
-struct vlr_subscr *_vlr_subscr_find_by_imsi(struct vlr_instance *vlr,
- const char *imsi,
- const char *file, int line)
-{
- struct vlr_subscr *vsub;
-
- if (!imsi || !*imsi)
- return NULL;
-
- llist_for_each_entry(vsub, &vlr->subscribers, list) {
- if (vlr_subscr_matches_imsi(vsub, imsi))
- return _vlr_subscr_get(vsub, file, line);
- }
- return NULL;
-}
-
-struct vlr_subscr *_vlr_subscr_find_by_tmsi(struct vlr_instance *vlr,
- uint32_t tmsi,
- const char *file, int line)
-{
- struct vlr_subscr *vsub;
-
- if (tmsi == GSM_RESERVED_TMSI)
- return NULL;
-
- llist_for_each_entry(vsub, &vlr->subscribers, list) {
- if (vlr_subscr_matches_tmsi(vsub, tmsi))
- return _vlr_subscr_get(vsub, file, line);
- }
- return NULL;
-}
-
-struct vlr_subscr *_vlr_subscr_find_by_msisdn(struct vlr_instance *vlr,
- const char *msisdn,
- const char *file, int line)
-{
- struct vlr_subscr *vsub;
-
- if (!msisdn || !*msisdn)
- return NULL;
-
- llist_for_each_entry(vsub, &vlr->subscribers, list) {
- if (vlr_subscr_matches_msisdn(vsub, msisdn))
- return _vlr_subscr_get(vsub, file, line);
- }
- return NULL;
-}
-
-/* Transmit GSUP message to HLR */
-static int vlr_tx_gsup_message(struct vlr_instance *vlr,
- struct osmo_gsup_message *gsup_msg)
-{
- struct msgb *msg = gsup_client_msgb_alloc();
-
- osmo_gsup_encode(msg, gsup_msg);
-
- if (!vlr->gsup_client) {
- LOGP(DVLR, LOGL_NOTICE, "GSUP link is down, cannot "
- "send GSUP: %s\n", msgb_hexdump(msg));
- msgb_free(msg);
- return -ENOTSUP;
- }
-
- LOGP(DVLR, LOGL_DEBUG, "GSUP tx: %s\n",
- osmo_hexdump_nospc(msg->data, msg->len));
-
- return gsup_client_send(vlr->gsup_client, msg);
-}
-
-/* Transmit GSUP message for subscriber to HLR, using IMSI from subscriber */
-static int vlr_subscr_tx_gsup_message(struct vlr_subscr *vsub,
- struct osmo_gsup_message *gsup_msg)
-{
- struct vlr_instance *vlr = vsub->vlr;
-
- if (strlen(gsup_msg->imsi) == 0)
- osmo_strlcpy(gsup_msg->imsi, vsub->imsi, sizeof(gsup_msg->imsi));
-
- return vlr_tx_gsup_message(vlr, gsup_msg);
-}
-
-/* Transmit GSUP error in response to original message */
-static int vlr_tx_gsup_error_reply(struct vlr_instance *vlr,
- 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 vlr_tx_gsup_message(vlr, &gsup_reply);
-}
-
-struct vlr_subscr *_vlr_subscr_get(struct vlr_subscr *sub, const char *file, int line)
-{
- if (!sub)
- return NULL;
- OSMO_ASSERT(sub->use_count < INT_MAX);
- sub->use_count++;
- LOGPSRC(DREF, LOGL_DEBUG, file, line,
- "VLR subscr %s usage increases to: %d\n",
- vlr_subscr_name(sub), sub->use_count);
- return sub;
-}
-
-struct vlr_subscr *_vlr_subscr_put(struct vlr_subscr *sub, const char *file, int line)
-{
- if (!sub)
- return NULL;
- sub->use_count--;
- LOGPSRC(DREF, sub->use_count >= 0? LOGL_DEBUG : LOGL_ERROR,
- file, line,
- "VLR subscr %s usage decreases to: %d\n",
- vlr_subscr_name(sub), sub->use_count);
- if (sub->use_count <= 0)
- vlr_subscr_free(sub);
- return NULL;
-}
-
-/* Allocate a new subscriber and insert it into list */
-static struct vlr_subscr *_vlr_subscr_alloc(struct vlr_instance *vlr)
-{
- struct vlr_subscr *vsub;
- int i;
-
- vsub = talloc_zero(vlr, struct vlr_subscr);
- vsub->vlr = vlr;
- vsub->tmsi = GSM_RESERVED_TMSI;
- vsub->tmsi_new = GSM_RESERVED_TMSI;
-
- for (i = 0; i < ARRAY_SIZE(vsub->auth_tuples); i++)
- vsub->auth_tuples[i].key_seq = GSM_KEY_SEQ_INVAL;
-
- INIT_LLIST_HEAD(&vsub->cs.requests);
- INIT_LLIST_HEAD(&vsub->ps.pdp_list);
-
- llist_add_tail(&vsub->list, &vlr->subscribers);
- return vsub;
-}
-
-struct vlr_subscr *vlr_subscr_alloc(struct vlr_instance *vlr)
-{
- return vlr_subscr_get(_vlr_subscr_alloc(vlr));
-}
-
-/* Send a GSUP Purge MS request.
- * TODO: this should be sent to the *previous* VLR when this VLR is "taking"
- * this subscriber, not to the HLR? */
-int vlr_subscr_purge(struct vlr_subscr *vsub)
-{
- struct osmo_gsup_message gsup_msg = {0};
-
- gsup_msg.message_type = OSMO_GSUP_MSGT_PURGE_MS_REQUEST;
-
- /* provide HLR number in case we know it */
- gsup_msg.hlr_enc_len = vsub->hlr.len;
- gsup_msg.hlr_enc = vsub->hlr.buf;
-
- return vlr_subscr_tx_gsup_message(vsub, &gsup_msg);
-}
-
-void vlr_subscr_cancel(struct vlr_subscr *vsub, enum gsm48_gmm_cause cause)
-{
- if (!vsub)
- return;
-
- if (vsub->lu_fsm) {
- if (vsub->lu_fsm->state == VLR_ULA_S_WAIT_HLR_UPD)
- osmo_fsm_inst_dispatch(vsub->lu_fsm,
- VLR_ULA_E_HLR_LU_RES,
- (void*)&cause);
- else
- osmo_fsm_inst_term(vsub->lu_fsm, OSMO_FSM_TERM_ERROR,
- 0);
- }
-
- if (vsub->proc_arq_fsm)
- osmo_fsm_inst_term(vsub->proc_arq_fsm, OSMO_FSM_TERM_ERROR, 0);
-}
-
-/* Call vlr_subscr_cancel(), then completely drop the entry from the VLR */
-void vlr_subscr_free(struct vlr_subscr *vsub)
-{
- llist_del(&vsub->list);
- DEBUGP(DREF, "freeing VLR subscr %s\n", vlr_subscr_name(vsub));
- talloc_free(vsub);
-}
-
-/* Generate a new TMSI and store in vsub->tmsi_new.
- * Search all known subscribers to ensure that the TMSI is unique. */
-int vlr_subscr_alloc_tmsi(struct vlr_subscr *vsub)
-{
- struct vlr_instance *vlr = vsub->vlr;
- uint32_t tmsi;
- int tried;
-
- for (tried = 0; tried < 100; tried++) {
- if (RAND_bytes((uint8_t *) &tmsi, sizeof(tmsi)) != 1) {
- LOGP(DVLR, LOGL_ERROR, "RAND_bytes failed\n");
- return -1;
- }
- /* throw the dice again, if the TSMI doesn't fit */
- if (tmsi == GSM_RESERVED_TMSI)
- continue;
-
- /* Section 2.4 of 23.003: MSC has two MSB 00/01/10, SGSN 11 */
- if (vlr->cfg.is_ps) {
- /* SGSN */
- tmsi |= 0xC000000;
- } else {
- /* MSC */
- if ((tmsi & 0xC0000000) == 0xC0000000)
- tmsi &= ~0xC0000000;
- }
-
- /* If this TMSI is already in use, try another one. */
- if (vlr_subscr_find_by_tmsi(vlr, tmsi))
- continue;
-
- vsub->tmsi_new = tmsi;
- return 0;
- }
-
- LOGP(DVLR, LOGL_ERROR, "subscr %s: unable to generate valid TMSI"
- " after %d tries\n", vlr_subscr_name(vsub), tried);
- return -1;
-}
-
-/* Find subscriber by IMSI, or create new subscriber if not found.
- * \param[in] vlr VLR instace.
- * \param[in] imsi IMSI string.
- * \param[out] created if non-NULL, returns whether a new entry was created. */
-struct vlr_subscr *_vlr_subscr_find_or_create_by_imsi(struct vlr_instance *vlr,
- const char *imsi,
- bool *created,
- const char *file,
- int line)
-{
- struct vlr_subscr *vsub;
- vsub = _vlr_subscr_find_by_imsi(vlr, imsi, file, line);
- if (vsub) {
- if (created)
- *created = false;
- return vsub;
- }
-
- vsub = _vlr_subscr_get(_vlr_subscr_alloc(vlr), file, line);
- if (!vsub)
- return NULL;
- vlr_subscr_set_imsi(vsub, imsi);
- LOGP(DVLR, LOGL_INFO, "New subscr, IMSI: %s\n", vsub->imsi);
- if (created)
- *created = true;
- return vsub;
-}
-
-/* Find subscriber by TMSI, or create new subscriber if not found.
- * \param[in] vlr VLR instace.
- * \param[in] tmsi TMSI.
- * \param[out] created if non-NULL, returns whether a new entry was created. */
-struct vlr_subscr *_vlr_subscr_find_or_create_by_tmsi(struct vlr_instance *vlr,
- uint32_t tmsi,
- bool *created,
- const char *file,
- int line)
-{
- struct vlr_subscr *vsub;
- vsub = _vlr_subscr_find_by_tmsi(vlr, tmsi, file, line);
- if (vsub) {
- if (created)
- *created = false;
- return vsub;
- }
-
- vsub = _vlr_subscr_get(_vlr_subscr_alloc(vlr), file, line);
- if (!vsub)
- return NULL;
- vsub->tmsi = tmsi;
- LOGP(DVLR, LOGL_INFO, "New subscr, TMSI: 0x%08x\n", vsub->tmsi);
- if (created)
- *created = true;
- return vsub;
-}
-
-void vlr_subscr_set_imsi(struct vlr_subscr *vsub, const char *imsi)
-{
- if (!vsub)
- return;
- osmo_strlcpy(vsub->imsi, imsi, sizeof(vsub->imsi));
- vsub->id = atoll(vsub->imsi);
- DEBUGP(DVLR, "set IMSI on subscriber; IMSI=%s id=%llu\n",
- vsub->imsi, vsub->id);
-}
-
-void vlr_subscr_set_imei(struct vlr_subscr *vsub, const char *imei)
-{
- if (!vsub)
- return;
- osmo_strlcpy(vsub->imei, imei, sizeof(vsub->imei));
- DEBUGP(DVLR, "set IMEI on subscriber; IMSI=%s IMEI=%s\n",
- vsub->imsi, vsub->imei);
-}
-
-void vlr_subscr_set_imeisv(struct vlr_subscr *vsub, const char *imeisv)
-{
- if (!vsub)
- return;
- osmo_strlcpy(vsub->imeisv, imeisv, sizeof(vsub->imeisv));
- DEBUGP(DVLR, "set IMEISV on subscriber; IMSI=%s IMEISV=%s\n",
- vsub->imsi, vsub->imeisv);
-}
-
-/* Safely copy the given MSISDN string to vsub->msisdn */
-void vlr_subscr_set_msisdn(struct vlr_subscr *vsub, const char *msisdn)
-{
- if (!vsub)
- return;
- osmo_strlcpy(vsub->msisdn, msisdn, sizeof(vsub->msisdn));
- DEBUGP(DVLR, "set MSISDN on subscriber; IMSI=%s MSISDN=%s\n",
- vsub->imsi, vsub->msisdn);
-}
-
-bool vlr_subscr_matches_imsi(struct vlr_subscr *vsub, const char *imsi)
-{
- return vsub && imsi && vsub->imsi[0] && !strcmp(vsub->imsi, imsi);
-}
-
-bool vlr_subscr_matches_tmsi(struct vlr_subscr *vsub, uint32_t tmsi)
-{
- return vsub && tmsi != GSM_RESERVED_TMSI
- && (vsub->tmsi == tmsi || vsub->tmsi_new == tmsi);
-}
-
-bool vlr_subscr_matches_msisdn(struct vlr_subscr *vsub, const char *msisdn)
-{
- return vsub && msisdn && vsub->msisdn[0]
- && !strcmp(vsub->msisdn, msisdn);
-}
-
-bool vlr_subscr_matches_imei(struct vlr_subscr *vsub, const char *imei)
-{
- return vsub && imei && vsub->imei[0]
- && !strcmp(vsub->imei, imei);
-}
-
-/* Send updated subscriber information to HLR */
-int vlr_subscr_changed(struct vlr_subscr *vsub)
-{
- /* FIXME */
- LOGP(DVLR, LOGL_ERROR, "Not implemented: %s\n", __func__);
- return 0;
-}
-
-/***********************************************************************
- * PDP context data
- ***********************************************************************/
-
-struct sgsn_subscriber_pdp_data *
-vlr_subscr_pdp_data_alloc(struct vlr_subscr *vsub)
-{
- struct sgsn_subscriber_pdp_data* pdata;
-
- pdata = talloc_zero(vsub, struct sgsn_subscriber_pdp_data);
-
- llist_add_tail(&pdata->list, &vsub->ps.pdp_list);
-
- return pdata;
-}
-
-static int vlr_subscr_pdp_data_clear(struct vlr_subscr *vsub)
-{
- struct sgsn_subscriber_pdp_data *pdp, *pdp2;
- int count = 0;
-
- llist_for_each_entry_safe(pdp, pdp2, &vsub->ps.pdp_list, list) {
- llist_del(&pdp->list);
- talloc_free(pdp);
- count += 1;
- }
-
- return count;
-}
-
-static struct sgsn_subscriber_pdp_data *
-vlr_subscr_pdp_data_get_by_id(struct vlr_subscr *vsub, unsigned context_id)
-{
- struct sgsn_subscriber_pdp_data *pdp;
-
- llist_for_each_entry(pdp, &vsub->ps.pdp_list, list) {
- if (pdp->context_id == context_id)
- return pdp;
- }
-
- return NULL;
-}
-
-/***********************************************************************
- * Actual Implementation
- ***********************************************************************/
-
-static int vlr_rx_gsup_unknown_imsi(struct vlr_instance *vlr,
- struct osmo_gsup_message *gsup_msg)
-{
- if (OSMO_GSUP_IS_MSGT_REQUEST(gsup_msg->message_type)) {
- vlr_tx_gsup_error_reply(vlr, gsup_msg,
- GMM_CAUSE_IMSI_UNKNOWN);
- LOGP(DVLR, 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(DVLR, 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(DVLR, 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;
-}
-
-static int vlr_rx_gsup_purge_no_subscr(struct vlr_instance *vlr,
- 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;
-}
-
-/* VLR internal call to request UpdateLocation from HLR */
-int vlr_subscr_req_lu(struct vlr_subscr *vsub, bool is_ps)
-{
- struct osmo_gsup_message gsup_msg = {0};
- int rc;
-
- gsup_msg.message_type = OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST;
- rc = vlr_subscr_tx_gsup_message(vsub, &gsup_msg);
-
- return rc;
-}
-
-/* VLR internal call to request tuples from HLR */
-int vlr_subscr_req_sai(struct vlr_subscr *vsub,
- const uint8_t *auts, const uint8_t *auts_rand)
-{
- struct osmo_gsup_message gsup_msg = {0};
-
- gsup_msg.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST;
- gsup_msg.auts = auts;
- gsup_msg.rand = auts_rand;
-
- return vlr_subscr_tx_gsup_message(vsub, &gsup_msg);
-}
-
-/* Tell HLR that authentication failure occurred */
-int vlr_subscr_tx_auth_fail_rep(struct vlr_subscr *vsub)
-{
- struct osmo_gsup_message gsup_msg = {0};
-
- gsup_msg.message_type = OSMO_GSUP_MSGT_AUTH_FAIL_REPORT;
- osmo_strlcpy(gsup_msg.imsi, vsub->imsi, sizeof(gsup_msg.imsi));
- return vlr_tx_gsup_message(vsub->vlr, &gsup_msg);
-}
-
-/* Update the subscriber with GSUP-received auth tuples */
-void vlr_subscr_update_tuples(struct vlr_subscr *vsub,
- const struct osmo_gsup_message *gsup)
-{
- unsigned int i;
- unsigned int got_tuples;
-
- if (gsup->num_auth_vectors) {
- memset(&vsub->auth_tuples, 0, sizeof(vsub->auth_tuples));
- for (i = 0; i < ARRAY_SIZE(vsub->auth_tuples); i++)
- vsub->auth_tuples[i].key_seq = GSM_KEY_SEQ_INVAL;
- }
-
- got_tuples = 0;
- for (i = 0; i < gsup->num_auth_vectors; i++) {
- size_t key_seq = i;
-
- if (key_seq >= ARRAY_SIZE(vsub->auth_tuples)) {
- LOGVSUBP(LOGL_NOTICE, vsub,
- "Skipping auth tuple wih invalid cksn %zu\n",
- key_seq);
- continue;
- }
- vsub->auth_tuples[i].vec = gsup->auth_vectors[i];
- vsub->auth_tuples[i].key_seq = key_seq;
- got_tuples ++;
- }
-
- LOGVSUBP(LOGL_DEBUG, vsub, "Received %u auth tuples\n", got_tuples);
-
- if (!got_tuples) {
- /* FIXME what now? */
- // vlr_subscr_cancel(vsub, GMM_CAUSE_GSM_AUTH_UNACCEPT); ?
- }
-
- /* New tuples means last_tuple becomes invalid */
- vsub->last_tuple = NULL;
-}
-
-/* Handle SendAuthInfo Result/Error from HLR */
-static int vlr_subscr_handle_sai_res(struct vlr_subscr *vsub,
- const struct osmo_gsup_message *gsup)
-{
- struct osmo_fsm_inst *auth_fi = vsub->auth_fsm;
- void *data = (void *) gsup;
-
- switch (gsup->message_type) {
- case OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT:
- osmo_fsm_inst_dispatch(auth_fi, VLR_AUTH_E_HLR_SAI_ACK, data);
- break;
- case OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR:
- osmo_fsm_inst_dispatch(auth_fi, VLR_AUTH_E_HLR_SAI_NACK, data);
- break;
- default:
- return -1;
- }
-
- return 0;
-}
-
-static int decode_bcd_number_safe(char *output, int output_len,
- const uint8_t *bcd_lv, int input_len,
- int h_len)
-{
- uint8_t len;
- OSMO_ASSERT(output_len >= 1);
- *output = '\0';
- if (input_len < 1)
- return -EIO;
- len = bcd_lv[0];
- if (input_len < len)
- return -EIO;
- return gsm48_decode_bcd_number(output, output_len, bcd_lv, h_len);
-}
-
-static void vlr_subscr_gsup_insert_data(struct vlr_subscr *vsub,
- const struct osmo_gsup_message *gsup_msg)
-{
- unsigned idx;
- int rc;
-
- if (gsup_msg->msisdn_enc) {
- decode_bcd_number_safe(vsub->msisdn, sizeof(vsub->msisdn),
- gsup_msg->msisdn_enc,
- gsup_msg->msisdn_enc_len, 0);
- LOGP(DVLR, LOGL_DEBUG, "IMSI:%s has MSISDN:%s\n",
- vsub->imsi, vsub->msisdn);
- }
-
- if (gsup_msg->hlr_enc) {
- if (gsup_msg->hlr_enc_len > sizeof(vsub->hlr.buf)) {
- LOGP(DVLR, LOGL_ERROR, "HLR-Number too long (%zu)\n",
- gsup_msg->hlr_enc_len);
- vsub->hlr.len = 0;
- } else {
- memcpy(vsub->hlr.buf, gsup_msg->hlr_enc,
- gsup_msg->hlr_enc_len);
- vsub->hlr.len = gsup_msg->hlr_enc_len;
- }
- }
-
- if (gsup_msg->pdp_info_compl) {
- rc = vlr_subscr_pdp_data_clear(vsub);
- if (rc > 0)
- LOGP(DVLR, LOGL_INFO, "Cleared existing PDP info\n");
- }
-
- for (idx = 0; idx < gsup_msg->num_pdp_infos; idx++) {
- const 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) {
- LOGVSUBP(LOGL_ERROR, vsub,
- "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)) {
- LOGVSUBP(LOGL_ERROR, vsub,
- "QoS info too long (%zu)\n",
- pdp_info->qos_enc_len);
- continue;
- }
-
- LOGVSUBP(LOGL_INFO, vsub,
- "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 = vlr_subscr_pdp_data_get_by_id(vsub, ctx_id);
- if (!pdp_data) {
- pdp_data = vlr_subscr_pdp_data_alloc(vsub);
- 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;
- }
-}
-
-
-/* Handle InsertSubscrData Result from HLR */
-static int vlr_subscr_handle_isd_req(struct vlr_subscr *vsub,
- const struct osmo_gsup_message *gsup)
-{
- struct osmo_gsup_message gsup_reply = {0};
-
- vlr_subscr_gsup_insert_data(vsub, gsup);
- vsub->vlr->ops.subscr_update(vsub);
-
- gsup_reply.message_type = OSMO_GSUP_MSGT_INSERT_DATA_RESULT;
- return vlr_subscr_tx_gsup_message(vsub, &gsup_reply);
-}
-
-/* Handle UpdateLocation Result from HLR */
-static int vlr_subscr_handle_lu_res(struct vlr_subscr *vsub,
- const struct osmo_gsup_message *gsup)
-{
- if (!vsub->lu_fsm) {
- LOGVSUBP(LOGL_ERROR, vsub, "Rx GSUP LU Result "
- "without LU in progress\n");
- return -ENODEV;
- }
-
- /* 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 */
- vlr_subscr_gsup_insert_data(vsub, gsup);
-
- osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_LU_RES, NULL);
-
- return 0;
-}
-
-/* Handle UpdateLocation Result from HLR */
-static int vlr_subscr_handle_lu_err(struct vlr_subscr *vsub,
- const struct osmo_gsup_message *gsup)
-{
- if (!vsub->lu_fsm) {
- LOGVSUBP(LOGL_ERROR, vsub, "Rx GSUP LU Error "
- "without LU in progress\n");
- return -ENODEV;
- }
-
- LOGVSUBP(LOGL_DEBUG, vsub, "UpdateLocation failed; gmm_cause: %s\n",
- get_value_string(gsm48_gmm_cause_names, gsup->cause));
-
- osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_HLR_LU_RES,
- (void *)&gsup->cause);
-
- return 0;
-}
-
-/* Handle LOCATION CANCEL request from HLR */
-static int vlr_subscr_handle_cancel_req(struct vlr_subscr *vsub,
- 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;
-
- LOGVSUBP(LOGL_INFO, vsub, "Cancelling MS subscriber (%s)\n",
- is_update_procedure ?
- "update procedure" : "subscription withdraw");
-
- gsup_reply.message_type = OSMO_GSUP_MSGT_LOCATION_CANCEL_RESULT;
- vlr_subscr_tx_gsup_message(vsub, &gsup_reply);
-
- vlr_subscr_cancel(vsub, gsup_msg->cause);
-
- return 0;
-}
-
-/* Incoming handler for GSUP from HLR.
- * Keep this function non-static for direct invocation by unit tests. */
-int vlr_gsupc_read_cb(struct gsup_client *gsupc, struct msgb *msg)
-{
- struct vlr_instance *vlr = (struct vlr_instance *) gsupc->data;
- struct vlr_subscr *vsub;
- struct osmo_gsup_message gsup;
- int rc;
-
- DEBUGP(DVLR, "GSUP rx %u: %s\n", msgb_l2len(msg),
- osmo_hexdump_nospc(msgb_l2(msg), msgb_l2len(msg)));
-
- rc = osmo_gsup_decode(msgb_l2(msg), msgb_l2len(msg), &gsup);
- if (rc < 0) {
- LOGP(DVLR, LOGL_ERROR,
- "decoding GSUP message fails with error '%s' (%d)\n",
- get_value_string(gsm48_gmm_cause_names, -rc), -rc);
- return rc;
- }
-
- if (!gsup.imsi[0]) {
- LOGP(DVLR, LOGL_ERROR, "Missing IMSI in GSUP message\n");
- if (OSMO_GSUP_IS_MSGT_REQUEST(gsup.message_type))
- vlr_tx_gsup_error_reply(vlr, &gsup,
- GMM_CAUSE_INV_MAND_INFO);
- return -GMM_CAUSE_INV_MAND_INFO;
- }
-
- vsub = vlr_subscr_find_by_imsi(vlr, gsup.imsi);
- if (!vsub) {
- switch (gsup.message_type) {
- case OSMO_GSUP_MSGT_PURGE_MS_RESULT:
- case OSMO_GSUP_MSGT_PURGE_MS_ERROR:
- return vlr_rx_gsup_purge_no_subscr(vlr, &gsup);
- default:
- return vlr_rx_gsup_unknown_imsi(vlr, &gsup);
- }
- }
-
- switch (gsup.message_type) {
- case OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT:
- case OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR:
- rc = vlr_subscr_handle_sai_res(vsub, &gsup);
- break;
- case OSMO_GSUP_MSGT_INSERT_DATA_REQUEST:
- rc = vlr_subscr_handle_isd_req(vsub, &gsup);
- break;
- case OSMO_GSUP_MSGT_LOCATION_CANCEL_REQUEST:
- rc = vlr_subscr_handle_cancel_req(vsub, &gsup);
- break;
- case OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT:
- rc = vlr_subscr_handle_lu_res(vsub, &gsup);
- break;
- case OSMO_GSUP_MSGT_UPDATE_LOCATION_ERROR:
- rc = vlr_subscr_handle_lu_err(vsub, &gsup);
- break;
- case OSMO_GSUP_MSGT_PURGE_MS_ERROR:
- case OSMO_GSUP_MSGT_PURGE_MS_RESULT:
- case OSMO_GSUP_MSGT_DELETE_DATA_REQUEST:
- LOGVSUBP(LOGL_ERROR, vsub,
- "Rx GSUP msg_type=%d not yet implemented\n",
- gsup.message_type);
- rc = -GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL;
- break;
- default:
- LOGVSUBP(LOGL_ERROR, vsub,
- "Rx GSUP msg_type=%d not valid at VLR/SGSN side\n",
- gsup.message_type);
- rc = -GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL;
- break;
- }
-
- vlr_subscr_put(vsub);
- return rc;
-}
-
-/* MSC->VLR: Subscriber has provided IDENTITY RESPONSE */
-int vlr_subscr_rx_id_resp(struct vlr_subscr *vsub,
- const uint8_t *mi, size_t mi_len)
-{
- char mi_string[GSM48_MI_SIZE];
- uint8_t mi_type = mi[0] & GSM_MI_TYPE_MASK;
-
- gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len);
-
- /* update the vlr_subscr with the given identity */
- switch (mi_type) {
- case GSM_MI_TYPE_IMSI:
- if (vsub->imsi[0]
- && !vlr_subscr_matches_imsi(vsub, mi_string)) {
- LOGVSUBP(LOGL_ERROR, vsub, "IMSI in ID RESP differs:"
- " %s\n", mi_string);
- } else
- vlr_subscr_set_imsi(vsub, mi_string);
- break;
- case GSM_MI_TYPE_IMEI:
- vlr_subscr_set_imei(vsub, mi_string);
- break;
- case GSM_MI_TYPE_IMEISV:
- vlr_subscr_set_imeisv(vsub, mi_string);
- break;
- }
-
- if (vsub->auth_fsm) {
- switch (mi_type) {
- case GSM_MI_TYPE_IMSI:
- osmo_fsm_inst_dispatch(vsub->auth_fsm,
- VLR_AUTH_E_MS_ID_IMSI, mi_string);
- break;
- }
- }
-
- if (vsub->lu_fsm) {
- uint32_t event = 0;
- switch (mi_type) {
- case GSM_MI_TYPE_IMSI:
- event = VLR_ULA_E_ID_IMSI;
- break;
- case GSM_MI_TYPE_IMEI:
- event = VLR_ULA_E_ID_IMEI;
- break;
- case GSM_MI_TYPE_IMEISV:
- event = VLR_ULA_E_ID_IMEISV;
- break;
- default:
- OSMO_ASSERT(0);
- break;
- }
- osmo_fsm_inst_dispatch(vsub->lu_fsm, event, mi_string);
- } else {
- LOGVSUBP(LOGL_NOTICE, vsub, "gratuitous ID RESPONSE?!?\n");
- }
-
- return 0;
-}
-
-/* MSC->VLR: Subscriber has provided IDENTITY RESPONSE */
-int vlr_subscr_rx_tmsi_reall_compl(struct vlr_subscr *vsub)
-{
- if (vsub->lu_fsm) {
- return osmo_fsm_inst_dispatch(vsub->lu_fsm,
- VLR_ULA_E_NEW_TMSI_ACK, NULL);
- } else if (vsub->proc_arq_fsm) {
- return osmo_fsm_inst_dispatch(vsub->proc_arq_fsm,
- PR_ARQ_E_TMSI_ACK, NULL);
- } else {
- LOGVSUBP(LOGL_NOTICE, vsub,
- "gratuitous TMSI REALLOC COMPL");
- return -EINVAL;
- }
-}
-
-int vlr_subscr_rx_imsi_detach(struct vlr_subscr *vsub)
-{
- /* paranoia: should any LU or PARQ FSMs still be running, stop them. */
- vlr_subscr_cancel(vsub, GMM_CAUSE_IMPL_DETACHED);
-
- vsub->imsi_detached_flag = true;
- if (vsub->lu_complete) {
- vsub->lu_complete = false;
- /* balancing the get from vlr_lu_compl_fsm_success() */
- vlr_subscr_put(vsub);
- }
- return 0;
-}
-
-/* Tear down any running FSMs due to MSC connection timeout.
- * Visit all vsub->*_fsm pointers and give them a queue to send a final reject
- * message before the entire connection is torn down.
- * \param[in] vsub subscriber to tear down
- */
-void vlr_subscr_conn_timeout(struct vlr_subscr *vsub)
-{
- if (!vsub)
- return;
-
- vlr_loc_update_conn_timeout(vsub->lu_fsm);
- vlr_parq_conn_timeout(vsub->proc_arq_fsm);
-}
-
-struct vlr_instance *vlr_alloc(void *ctx, const struct vlr_ops *ops)
-{
- struct vlr_instance *vlr = talloc_zero(ctx, struct vlr_instance);
- OSMO_ASSERT(vlr);
-
- /* Some of these are needed only on UTRAN, but in case the caller wants
- * only GERAN, she should just provide dummy callbacks. */
- OSMO_ASSERT(ops->tx_auth_req);
- OSMO_ASSERT(ops->tx_auth_rej);
- OSMO_ASSERT(ops->tx_id_req);
- OSMO_ASSERT(ops->tx_lu_acc);
- OSMO_ASSERT(ops->tx_lu_rej);
- OSMO_ASSERT(ops->tx_cm_serv_acc);
- OSMO_ASSERT(ops->tx_cm_serv_rej);
- OSMO_ASSERT(ops->set_ciph_mode);
- OSMO_ASSERT(ops->tx_common_id);
- OSMO_ASSERT(ops->subscr_update);
- OSMO_ASSERT(ops->subscr_assoc);
-
- INIT_LLIST_HEAD(&vlr->subscribers);
- INIT_LLIST_HEAD(&vlr->operations);
- memcpy(&vlr->ops, ops, sizeof(vlr->ops));
-
- /* osmo_auth_fsm.c */
- osmo_fsm_register(&vlr_auth_fsm);
- /* osmo_lu_fsm.c */
- vlr_lu_fsm_init();
- /* vlr_access_request_fsm.c */
- vlr_parq_fsm_init();
-
- return vlr;
-}
-
-int vlr_start(const char *gsup_unit_name, struct vlr_instance *vlr,
- const char *gsup_server_addr_str, uint16_t gsup_server_port)
-{
- OSMO_ASSERT(vlr);
-
- vlr->gsup_client = gsup_client_create(gsup_unit_name,
- gsup_server_addr_str,
- gsup_server_port,
- &vlr_gsupc_read_cb, NULL);
- if (!vlr->gsup_client)
- return -ENOMEM;
- vlr->gsup_client->data = vlr;
-
- return 0;
-}
-
-/* MSC->VLR: Subscribre has disconnected */
-int vlr_subscr_disconnected(struct vlr_subscr *vsub)
-{
- /* This corresponds to a MAP-ABORT from MSC->VLR on a classic B
- * interface */
- osmo_fsm_inst_term(vsub->lu_fsm, OSMO_FSM_TERM_REQUEST, NULL);
- osmo_fsm_inst_term(vsub->auth_fsm, OSMO_FSM_TERM_REQUEST, NULL);
- vsub->msc_conn_ref = NULL;
-
- return 0;
-}
-
-/* MSC->VLR: Receive Authentication Failure from Subscriber */
-int vlr_subscr_rx_auth_fail(struct vlr_subscr *vsub, const uint8_t *auts)
-{
- struct vlr_auth_resp_par par = {0};
- par.auts = auts;
-
- osmo_fsm_inst_dispatch(vsub->auth_fsm, VLR_AUTH_E_MS_AUTH_FAIL, &par);
- return 0;
-}
-
-/* MSC->VLR: Receive Authentication Response from MS
- * \returns 1 in case of success, 0 in case of delay, -1 on auth error */
-int vlr_subscr_rx_auth_resp(struct vlr_subscr *vsub, bool is_r99,
- bool is_utran, const uint8_t *res, uint8_t res_len)
-{
- struct osmo_fsm_inst *auth_fi = vsub->auth_fsm;
- struct vlr_auth_resp_par par;
-
- par.is_r99 = is_r99;
- par.is_utran = is_utran;
- par.res = res;
- par.res_len = res_len;
- osmo_fsm_inst_dispatch(auth_fi, VLR_AUTH_E_MS_AUTH_RESP, (void *) &par);
-
- return 0;
-}
-
-/* MSC->VLR: Receive result of Ciphering Mode Command from MS */
-void vlr_subscr_rx_ciph_res(struct vlr_subscr *vsub, struct vlr_ciph_result *res)
-{
- if (vsub->lu_fsm && vsub->lu_fsm->state == VLR_ULA_S_WAIT_CIPH)
- osmo_fsm_inst_dispatch(vsub->lu_fsm, VLR_ULA_E_CIPH_RES, res);
- if (vsub->proc_arq_fsm
- && vsub->proc_arq_fsm->state == PR_ARQ_S_WAIT_CIPH)
- osmo_fsm_inst_dispatch(vsub->proc_arq_fsm, PR_ARQ_E_CIPH_RES,
- res);
-}
-
-/* Internal evaluation of requested ciphering mode.
- * Send set_ciph_mode() to MSC depending on the ciph_mode argument.
- * \param[in] vlr VLR instance.
- * \param[in] fi Calling FSM instance, for logging.
- * \param[in] msc_conn_ref MSC conn to send to.
- * \param[in] ciph_mode Ciphering config, to decide whether to do ciphering.
- * \returns 0 if no ciphering is needed or message was sent successfully,
- * or a negative value if ciph_mode is invalid or sending failed.
- */
-int vlr_set_ciph_mode(struct vlr_instance *vlr,
- struct osmo_fsm_inst *fi,
- void *msc_conn_ref,
- enum vlr_ciph ciph_mode,
- bool retrieve_imeisv)
-{
- switch (ciph_mode) {
- case VLR_CIPH_NONE:
- return 0;
-
- case VLR_CIPH_A5_1:
- case VLR_CIPH_A5_3:
- return vlr->ops.set_ciph_mode(msc_conn_ref,
- ciph_mode,
- retrieve_imeisv);
-
- case VLR_CIPH_A5_2:
- /* TODO policy by user config? */
- LOGPFSML(fi, LOGL_ERROR, "A5/2 ciphering is not allowed\n");
- return -EINVAL;
-
- default:
- LOGPFSML(fi, LOGL_ERROR, "unknown ciphering value: %d\n",
- ciph_mode);
- return -EINVAL;
- }
-}
-
-void log_set_filter_vlr_subscr(struct log_target *target,
- struct vlr_subscr *vlr_subscr)
-{
- struct vlr_subscr **fsub = (void*)&target->filter_data[LOG_FLT_VLR_SUBSCR];
-
- /* free the old data */
- if (*fsub) {
- vlr_subscr_put(*fsub);
- *fsub = NULL;
- }
-
- if (vlr_subscr) {
- target->filter_map |= (1 << LOG_FLT_VLR_SUBSCR);
- *fsub = vlr_subscr_get(vlr_subscr);
- } else
- target->filter_map &= ~(1 << LOG_FLT_VLR_SUBSCR);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 18:27:02 +0000