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-rw-r--r--openbsc/src/gprs/gb_proxy_tlli.c723
1 files changed, 0 insertions, 723 deletions
diff --git a/openbsc/src/gprs/gb_proxy_tlli.c b/openbsc/src/gprs/gb_proxy_tlli.c
deleted file mode 100644
index 3b3b976a5..000000000
--- a/openbsc/src/gprs/gb_proxy_tlli.c
+++ /dev/null
@@ -1,723 +0,0 @@
-/* Gb-proxy TLLI state handling */
-
-/* (C) 2014 by On-Waves
- * 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/gsm48.h>
-
-#include <openbsc/gb_proxy.h>
-
-#include <openbsc/gprs_utils.h>
-#include <openbsc/gprs_gb_parse.h>
-
-#include <openbsc/debug.h>
-
-#include <osmocom/gsm/gsm_utils.h>
-
-#include <osmocom/core/rate_ctr.h>
-#include <osmocom/core/talloc.h>
-
-struct gbproxy_link_info *gbproxy_link_info_by_tlli(struct gbproxy_peer *peer,
- uint32_t tlli)
-{
- struct gbproxy_link_info *link_info;
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- if (!tlli)
- return NULL;
-
- llist_for_each_entry(link_info, &state->logical_links, list)
- if (link_info->tlli.current == tlli ||
- link_info->tlli.assigned == tlli)
- return link_info;
-
- return NULL;
-}
-
-struct gbproxy_link_info *gbproxy_link_info_by_ptmsi(
- struct gbproxy_peer *peer,
- uint32_t ptmsi)
-{
- struct gbproxy_link_info *link_info;
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- if (ptmsi == GSM_RESERVED_TMSI)
- return NULL;
-
- llist_for_each_entry(link_info, &state->logical_links, list)
- if (link_info->tlli.ptmsi == ptmsi)
- return link_info;
-
- return NULL;
-}
-
-struct gbproxy_link_info *gbproxy_link_info_by_any_sgsn_tlli(
- struct gbproxy_peer *peer,
- uint32_t tlli)
-{
- struct gbproxy_link_info *link_info;
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- if (!tlli)
- return NULL;
-
- /* Don't care about the NSEI */
- llist_for_each_entry(link_info, &state->logical_links, list)
- if (link_info->sgsn_tlli.current == tlli ||
- link_info->sgsn_tlli.assigned == tlli)
- return link_info;
-
- return NULL;
-}
-
-struct gbproxy_link_info *gbproxy_link_info_by_sgsn_tlli(
- struct gbproxy_peer *peer,
- uint32_t tlli, uint32_t sgsn_nsei)
-{
- struct gbproxy_link_info *link_info;
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- if (!tlli)
- return NULL;
-
- llist_for_each_entry(link_info, &state->logical_links, list)
- if ((link_info->sgsn_tlli.current == tlli ||
- link_info->sgsn_tlli.assigned == tlli) &&
- link_info->sgsn_nsei == sgsn_nsei)
- return link_info;
-
- return NULL;
-}
-
-struct gbproxy_link_info *gbproxy_link_info_by_imsi(
- struct gbproxy_peer *peer,
- const uint8_t *imsi,
- size_t imsi_len)
-{
- struct gbproxy_link_info *link_info;
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- if (!gprs_is_mi_imsi(imsi, imsi_len))
- return NULL;
-
- llist_for_each_entry(link_info, &state->logical_links, list) {
- if (link_info->imsi_len != imsi_len)
- continue;
- if (memcmp(link_info->imsi, imsi, imsi_len) != 0)
- continue;
-
- return link_info;
- }
-
- return NULL;
-}
-
-void gbproxy_link_info_discard_messages(struct gbproxy_link_info *link_info)
-{
- struct msgb *msg, *nxt;
-
- llist_for_each_entry_safe(msg, nxt, &link_info->stored_msgs, list) {
- llist_del(&msg->list);
- msgb_free(msg);
- }
-}
-
-void gbproxy_delete_link_info(struct gbproxy_peer *peer,
- struct gbproxy_link_info *link_info)
-{
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- gbproxy_link_info_discard_messages(link_info);
-
- llist_del(&link_info->list);
- talloc_free(link_info);
- state->logical_link_count -= 1;
-
- peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current =
- state->logical_link_count;
-}
-
-void gbproxy_delete_link_infos(struct gbproxy_peer *peer)
-{
- struct gbproxy_link_info *link_info, *nxt;
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- llist_for_each_entry_safe(link_info, nxt, &state->logical_links, list)
- gbproxy_delete_link_info(peer, link_info);
-
- OSMO_ASSERT(state->logical_link_count == 0);
- OSMO_ASSERT(llist_empty(&state->logical_links));
-}
-
-void gbproxy_attach_link_info(struct gbproxy_peer *peer, time_t now,
- struct gbproxy_link_info *link_info)
-{
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- link_info->timestamp = now;
- llist_add(&link_info->list, &state->logical_links);
- state->logical_link_count += 1;
-
- peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current =
- state->logical_link_count;
-}
-
-int gbproxy_remove_stale_link_infos(struct gbproxy_peer *peer, time_t now)
-{
- struct gbproxy_patch_state *state = &peer->patch_state;
- int exceeded_max_len = 0;
- int deleted_count = 0;
- int check_for_age;
-
- if (peer->cfg->tlli_max_len > 0)
- exceeded_max_len =
- state->logical_link_count - peer->cfg->tlli_max_len;
-
- check_for_age = peer->cfg->tlli_max_age > 0;
-
- for (; exceeded_max_len > 0; exceeded_max_len--) {
- struct gbproxy_link_info *link_info;
- OSMO_ASSERT(!llist_empty(&state->logical_links));
- link_info = llist_entry(state->logical_links.prev,
- struct gbproxy_link_info,
- list);
- LOGP(DGPRS, LOGL_INFO,
- "Removing TLLI %08x from list "
- "(stale, length %d, max_len exceeded)\n",
- link_info->tlli.current, state->logical_link_count);
-
- gbproxy_delete_link_info(peer, link_info);
- deleted_count += 1;
- }
-
- while (check_for_age && !llist_empty(&state->logical_links)) {
- time_t age;
- struct gbproxy_link_info *link_info;
- link_info = llist_entry(state->logical_links.prev,
- struct gbproxy_link_info,
- list);
- age = now - link_info->timestamp;
- /* age < 0 only happens after system time jumps, discard entry */
- if (age <= peer->cfg->tlli_max_age && age >= 0) {
- check_for_age = 0;
- continue;
- }
-
- LOGP(DGPRS, LOGL_INFO,
- "Removing TLLI %08x from list "
- "(stale, age %d, max_age exceeded)\n",
- link_info->tlli.current, (int)age);
-
- gbproxy_delete_link_info(peer, link_info);
- deleted_count += 1;
- }
-
- return deleted_count;
-}
-
-struct gbproxy_link_info *gbproxy_link_info_alloc( struct gbproxy_peer *peer)
-{
- struct gbproxy_link_info *link_info;
-
- link_info = talloc_zero(peer, struct gbproxy_link_info);
- link_info->tlli.ptmsi = GSM_RESERVED_TMSI;
- link_info->sgsn_tlli.ptmsi = GSM_RESERVED_TMSI;
-
- link_info->vu_gen_tx_bss = GBPROXY_INIT_VU_GEN_TX;
-
- INIT_LLIST_HEAD(&link_info->stored_msgs);
-
- return link_info;
-}
-
-void gbproxy_detach_link_info(
- struct gbproxy_peer *peer,
- struct gbproxy_link_info *link_info)
-{
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- llist_del(&link_info->list);
- OSMO_ASSERT(state->logical_link_count > 0);
- state->logical_link_count -= 1;
-
- peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current =
- state->logical_link_count;
-}
-
-void gbproxy_update_link_info(struct gbproxy_link_info *link_info,
- const uint8_t *imsi, size_t imsi_len)
-{
- if (!gprs_is_mi_imsi(imsi, imsi_len))
- return;
-
- link_info->imsi_len = imsi_len;
- link_info->imsi =
- talloc_realloc_size(link_info, link_info->imsi, imsi_len);
- OSMO_ASSERT(link_info->imsi != NULL);
- memcpy(link_info->imsi, imsi, imsi_len);
-}
-
-void gbproxy_reassign_tlli(struct gbproxy_tlli_state *tlli_state,
- struct gbproxy_peer *peer, uint32_t new_tlli)
-{
- if (new_tlli == tlli_state->current)
- return;
-
- LOGP(DGPRS, LOGL_INFO,
- "The TLLI has been reassigned from %08x to %08x\n",
- tlli_state->current, new_tlli);
-
- /* Remember assigned TLLI */
- tlli_state->assigned = new_tlli;
- tlli_state->bss_validated = 0;
- tlli_state->net_validated = 0;
-}
-
-uint32_t gbproxy_map_tlli(uint32_t other_tlli,
- struct gbproxy_link_info *link_info, int to_bss)
-{
- uint32_t tlli = 0;
- struct gbproxy_tlli_state *src, *dst;
- if (to_bss) {
- src = &link_info->sgsn_tlli;
- dst = &link_info->tlli;
- } else {
- src = &link_info->tlli;
- dst = &link_info->sgsn_tlli;
- }
- if (src->current == other_tlli)
- tlli = dst->current;
- else if (src->assigned == other_tlli)
- tlli = dst->assigned;
-
- return tlli;
-}
-
-static void gbproxy_validate_tlli(struct gbproxy_tlli_state *tlli_state,
- uint32_t tlli, int to_bss)
-{
- LOGP(DGPRS, LOGL_DEBUG,
- "%s({current = %08x, assigned = %08x, net_vld = %d, bss_vld = %d}, %08x)\n",
- __func__, tlli_state->current, tlli_state->assigned,
- tlli_state->net_validated, tlli_state->bss_validated, tlli);
-
- if (!tlli_state->assigned || tlli_state->assigned != tlli)
- return;
-
- /* TODO: Is this ok? Check spec */
- if (gprs_tlli_type(tlli) != TLLI_LOCAL)
- return;
-
- /* See GSM 04.08, 4.7.1.5 */
- if (to_bss)
- tlli_state->net_validated = 1;
- else
- tlli_state->bss_validated = 1;
-
- if (!tlli_state->bss_validated || !tlli_state->net_validated)
- return;
-
- LOGP(DGPRS, LOGL_INFO,
- "The TLLI %08x has been validated (was %08x)\n",
- tlli_state->assigned, tlli_state->current);
-
- tlli_state->current = tlli;
- tlli_state->assigned = 0;
-}
-
-static void gbproxy_touch_link_info(struct gbproxy_peer *peer,
- struct gbproxy_link_info *link_info,
- time_t now)
-{
- gbproxy_detach_link_info(peer, link_info);
- gbproxy_attach_link_info(peer, now, link_info);
-}
-
-static int gbproxy_unregister_link_info(struct gbproxy_peer *peer,
- struct gbproxy_link_info *link_info)
-{
- if (!link_info)
- return 1;
-
- if (link_info->tlli.ptmsi == GSM_RESERVED_TMSI && !link_info->imsi_len) {
- LOGP(DGPRS, LOGL_INFO,
- "Removing TLLI %08x from list (P-TMSI or IMSI are not set)\n",
- link_info->tlli.current);
- gbproxy_delete_link_info(peer, link_info);
- return 1;
- }
-
- link_info->tlli.current = 0;
- link_info->tlli.assigned = 0;
- link_info->sgsn_tlli.current = 0;
- link_info->sgsn_tlli.assigned = 0;
-
- link_info->is_deregistered = 1;
-
- gbproxy_reset_link(link_info);
-
- return 0;
-}
-
-int gbproxy_imsi_matches(struct gbproxy_config *cfg,
- enum gbproxy_match_id match_id,
- struct gbproxy_link_info *link_info)
-{
- struct gbproxy_match *match;
- OSMO_ASSERT(match_id >= 0 && match_id < ARRAY_SIZE(cfg->matches));
-
- match = &cfg->matches[match_id];
- if (!match->enable)
- return 1;
-
- return link_info != NULL && link_info->is_matching[match_id];
-}
-
-void gbproxy_assign_imsi(struct gbproxy_peer *peer,
- struct gbproxy_link_info *link_info,
- struct gprs_gb_parse_context *parse_ctx)
-{
- int imsi_matches;
- struct gbproxy_link_info *other_link_info;
- enum gbproxy_match_id match_id;
-
- /* Make sure that there is a second entry with the same IMSI */
- other_link_info = gbproxy_link_info_by_imsi(
- peer, parse_ctx->imsi, parse_ctx->imsi_len);
-
- if (other_link_info && other_link_info != link_info) {
- char mi_buf[200];
- mi_buf[0] = '\0';
- gsm48_mi_to_string(mi_buf, sizeof(mi_buf),
- parse_ctx->imsi, parse_ctx->imsi_len);
- LOGP(DGPRS, LOGL_INFO,
- "Removing TLLI %08x from list (IMSI %s re-used)\n",
- other_link_info->tlli.current, mi_buf);
- gbproxy_delete_link_info(peer, other_link_info);
- }
-
- /* Update the IMSI field */
- gbproxy_update_link_info(link_info,
- parse_ctx->imsi, parse_ctx->imsi_len);
-
- /* Check, whether the IMSI matches */
- OSMO_ASSERT(ARRAY_SIZE(link_info->is_matching) ==
- ARRAY_SIZE(peer->cfg->matches));
- for (match_id = 0; match_id < ARRAY_SIZE(link_info->is_matching);
- ++match_id) {
- imsi_matches = gbproxy_check_imsi(
- &peer->cfg->matches[match_id],
- parse_ctx->imsi, parse_ctx->imsi_len);
- if (imsi_matches >= 0)
- link_info->is_matching[match_id] = imsi_matches;
- }
-}
-
-static int gbproxy_tlli_match(const struct gbproxy_tlli_state *a,
- const struct gbproxy_tlli_state *b)
-{
- if (a->current && a->current == b->current)
- return 1;
-
- if (a->assigned && a->assigned == b->assigned)
- return 1;
-
- if (a->ptmsi != GSM_RESERVED_TMSI && a->ptmsi == b->ptmsi)
- return 1;
-
- return 0;
-}
-
-static void gbproxy_remove_matching_link_infos(
- struct gbproxy_peer *peer, struct gbproxy_link_info *link_info)
-{
- struct gbproxy_link_info *info, *nxt;
- struct gbproxy_patch_state *state = &peer->patch_state;
-
- /* Make sure that there is no second entry with the same P-TMSI or TLLI */
- llist_for_each_entry_safe(info, nxt, &state->logical_links, list) {
- if (info == link_info)
- continue;
-
- if (!gbproxy_tlli_match(&link_info->tlli, &info->tlli) &&
- (link_info->sgsn_nsei != info->sgsn_nsei ||
- !gbproxy_tlli_match(&link_info->sgsn_tlli, &info->sgsn_tlli)))
- continue;
-
- LOGP(DGPRS, LOGL_INFO,
- "Removing TLLI %08x from list (P-TMSI/TLLI re-used)\n",
- info->tlli.current);
- gbproxy_delete_link_info(peer, info);
- }
-}
-
-static struct gbproxy_link_info *gbproxy_get_link_info_ul(
- struct gbproxy_peer *peer,
- int *tlli_is_valid,
- struct gprs_gb_parse_context *parse_ctx)
-{
- struct gbproxy_link_info *link_info = NULL;
-
- if (parse_ctx->tlli_enc) {
- link_info = gbproxy_link_info_by_tlli(peer, parse_ctx->tlli);
-
- if (link_info) {
- *tlli_is_valid = 1;
- return link_info;
- }
- }
-
- *tlli_is_valid = 0;
-
- if (!link_info && parse_ctx->imsi) {
- link_info = gbproxy_link_info_by_imsi(
- peer, parse_ctx->imsi, parse_ctx->imsi_len);
- }
-
- if (!link_info && parse_ctx->ptmsi_enc && !parse_ctx->old_raid_is_foreign) {
- uint32_t bss_ptmsi;
- gprs_parse_tmsi(parse_ctx->ptmsi_enc, &bss_ptmsi);
- link_info = gbproxy_link_info_by_ptmsi(peer, bss_ptmsi);
- }
-
- if (!link_info)
- return NULL;
-
- link_info->is_deregistered = 0;
-
- return link_info;
-}
-
-struct gbproxy_link_info *gbproxy_update_link_state_ul(
- struct gbproxy_peer *peer,
- time_t now,
- struct gprs_gb_parse_context *parse_ctx)
-{
- struct gbproxy_link_info *link_info;
- int tlli_is_valid;
-
- link_info = gbproxy_get_link_info_ul(peer, &tlli_is_valid, parse_ctx);
-
- if (parse_ctx->tlli_enc && parse_ctx->llc) {
- uint32_t sgsn_tlli;
-
- if (!link_info) {
- LOGP(DGPRS, LOGL_INFO, "Adding TLLI %08x to list\n",
- parse_ctx->tlli);
- link_info = gbproxy_link_info_alloc(peer);
- gbproxy_attach_link_info(peer, now, link_info);
-
- /* Setup TLLIs */
- sgsn_tlli = gbproxy_make_sgsn_tlli(peer, link_info,
- parse_ctx->tlli);
- link_info->sgsn_tlli.current = sgsn_tlli;
- link_info->tlli.current = parse_ctx->tlli;
- } else if (!tlli_is_valid) {
- /* New TLLI (info found by IMSI or P-TMSI) */
- link_info->tlli.current = parse_ctx->tlli;
- link_info->tlli.assigned = 0;
- link_info->sgsn_tlli.current =
- gbproxy_make_sgsn_tlli(peer, link_info,
- parse_ctx->tlli);
- link_info->sgsn_tlli.assigned = 0;
- gbproxy_touch_link_info(peer, link_info, now);
- } else {
- sgsn_tlli = gbproxy_map_tlli(parse_ctx->tlli, link_info, 0);
- if (!sgsn_tlli)
- sgsn_tlli = gbproxy_make_sgsn_tlli(peer, link_info,
- parse_ctx->tlli);
-
- gbproxy_validate_tlli(&link_info->tlli,
- parse_ctx->tlli, 0);
- gbproxy_validate_tlli(&link_info->sgsn_tlli,
- sgsn_tlli, 0);
- gbproxy_touch_link_info(peer, link_info, now);
- }
- } else if (link_info) {
- gbproxy_touch_link_info(peer, link_info, now);
- }
-
- if (parse_ctx->imsi && link_info && link_info->imsi_len == 0)
- gbproxy_assign_imsi(peer, link_info, parse_ctx);
-
- return link_info;
-}
-
-static struct gbproxy_link_info *gbproxy_get_link_info_dl(
- struct gbproxy_peer *peer,
- struct gprs_gb_parse_context *parse_ctx)
-{
- struct gbproxy_link_info *link_info = NULL;
-
- /* Which key to use depends on its availability only, if that fails, do
- * not retry it with another key (e.g. IMSI). */
- if (parse_ctx->tlli_enc)
- link_info = gbproxy_link_info_by_sgsn_tlli(peer, parse_ctx->tlli,
- parse_ctx->peer_nsei);
-
- /* TODO: Get link_info by (SGSN) P-TMSI if that is available (see
- * GSM 08.18, 7.2) instead of using the IMSI as key. */
- else if (parse_ctx->imsi)
- link_info = gbproxy_link_info_by_imsi(
- peer, parse_ctx->imsi, parse_ctx->imsi_len);
-
- if (link_info)
- link_info->is_deregistered = 0;
-
- return link_info;
-}
-
-struct gbproxy_link_info *gbproxy_update_link_state_dl(
- struct gbproxy_peer *peer,
- time_t now,
- struct gprs_gb_parse_context *parse_ctx)
-{
- struct gbproxy_link_info *link_info = NULL;
-
- link_info = gbproxy_get_link_info_dl(peer, parse_ctx);
-
- if (parse_ctx->tlli_enc && parse_ctx->new_ptmsi_enc && link_info) {
- /* A new P-TMSI has been signalled in the message,
- * register new TLLI */
- uint32_t new_sgsn_ptmsi;
- uint32_t new_bss_ptmsi = GSM_RESERVED_TMSI;
- gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_sgsn_ptmsi);
-
- if (link_info->sgsn_tlli.ptmsi == new_sgsn_ptmsi)
- new_bss_ptmsi = link_info->tlli.ptmsi;
-
- if (new_bss_ptmsi == GSM_RESERVED_TMSI)
- new_bss_ptmsi = gbproxy_make_bss_ptmsi(peer, new_sgsn_ptmsi);
-
- LOGP(DGPRS, LOGL_INFO,
- "Got new PTMSI %08x from SGSN, using %08x for BSS\n",
- new_sgsn_ptmsi, new_bss_ptmsi);
- /* Setup PTMSIs */
- link_info->sgsn_tlli.ptmsi = new_sgsn_ptmsi;
- link_info->tlli.ptmsi = new_bss_ptmsi;
- } else if (parse_ctx->tlli_enc && parse_ctx->new_ptmsi_enc && !link_info &&
- !peer->cfg->patch_ptmsi) {
- /* A new P-TMSI has been signalled in the message with an unknown
- * TLLI, create a new link_info */
- /* TODO: Add a test case for this branch */
- uint32_t new_ptmsi;
- gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_ptmsi);
-
- LOGP(DGPRS, LOGL_INFO,
- "Adding TLLI %08x to list (SGSN, new P-TMSI is %08x)\n",
- parse_ctx->tlli, new_ptmsi);
-
- link_info = gbproxy_link_info_alloc(peer);
- link_info->sgsn_tlli.current = parse_ctx->tlli;
- link_info->tlli.current = parse_ctx->tlli;
- link_info->sgsn_tlli.ptmsi = new_ptmsi;
- link_info->tlli.ptmsi = new_ptmsi;
- gbproxy_attach_link_info(peer, now, link_info);
- } else if (parse_ctx->tlli_enc && parse_ctx->llc && !link_info &&
- !peer->cfg->patch_ptmsi) {
- /* Unknown SGSN TLLI, create a new link_info */
- uint32_t new_ptmsi;
- link_info = gbproxy_link_info_alloc(peer);
- LOGP(DGPRS, LOGL_INFO, "Adding TLLI %08x to list (SGSN)\n",
- parse_ctx->tlli);
-
- gbproxy_attach_link_info(peer, now, link_info);
-
- /* Setup TLLIs */
- link_info->sgsn_tlli.current = parse_ctx->tlli;
- link_info->tlli.current = parse_ctx->tlli;
-
- if (!parse_ctx->new_ptmsi_enc)
- return link_info;
- /* A new P-TMSI has been signalled in the message */
-
- gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_ptmsi);
- LOGP(DGPRS, LOGL_INFO,
- "Assigning new P-TMSI %08x\n", new_ptmsi);
- /* Setup P-TMSIs */
- link_info->sgsn_tlli.ptmsi = new_ptmsi;
- link_info->tlli.ptmsi = new_ptmsi;
- } else if (parse_ctx->tlli_enc && parse_ctx->llc && link_info) {
- uint32_t bss_tlli = gbproxy_map_tlli(parse_ctx->tlli,
- link_info, 1);
- gbproxy_validate_tlli(&link_info->sgsn_tlli, parse_ctx->tlli, 1);
- gbproxy_validate_tlli(&link_info->tlli, bss_tlli, 1);
- gbproxy_touch_link_info(peer, link_info, now);
- } else if (link_info) {
- gbproxy_touch_link_info(peer, link_info, now);
- }
-
- if (parse_ctx->imsi && link_info && link_info->imsi_len == 0)
- gbproxy_assign_imsi(peer, link_info, parse_ctx);
-
- return link_info;
-}
-
-int gbproxy_update_link_state_after(
- struct gbproxy_peer *peer,
- struct gbproxy_link_info *link_info,
- time_t now,
- struct gprs_gb_parse_context *parse_ctx)
-{
- int rc = 0;
- if (parse_ctx->invalidate_tlli && link_info) {
- int keep_info =
- peer->cfg->keep_link_infos == GBPROX_KEEP_ALWAYS ||
- (peer->cfg->keep_link_infos == GBPROX_KEEP_REATTACH &&
- parse_ctx->await_reattach) ||
- (peer->cfg->keep_link_infos == GBPROX_KEEP_IDENTIFIED &&
- link_info->imsi_len > 0);
- if (keep_info) {
- LOGP(DGPRS, LOGL_INFO, "Unregistering TLLI %08x\n",
- link_info->tlli.current);
- rc = gbproxy_unregister_link_info(peer, link_info);
- } else {
- LOGP(DGPRS, LOGL_INFO, "Removing TLLI %08x from list\n",
- link_info->tlli.current);
- gbproxy_delete_link_info(peer, link_info);
- rc = 1;
- }
- } else if (parse_ctx->to_bss && parse_ctx->tlli_enc &&
- parse_ctx->new_ptmsi_enc && link_info) {
- /* A new PTMSI has been signaled in the message,
- * register new TLLI */
- uint32_t new_sgsn_ptmsi = link_info->sgsn_tlli.ptmsi;
- uint32_t new_bss_ptmsi = link_info->tlli.ptmsi;
- uint32_t new_sgsn_tlli;
- uint32_t new_bss_tlli = 0;
-
- new_sgsn_tlli = gprs_tmsi2tlli(new_sgsn_ptmsi, TLLI_LOCAL);
- if (new_bss_ptmsi != GSM_RESERVED_TMSI)
- new_bss_tlli = gprs_tmsi2tlli(new_bss_ptmsi, TLLI_LOCAL);
- LOGP(DGPRS, LOGL_INFO,
- "Assigning new TLLI %08x to SGSN, %08x to BSS\n",
- new_sgsn_tlli, new_bss_tlli);
-
- gbproxy_reassign_tlli(&link_info->sgsn_tlli,
- peer, new_sgsn_tlli);
- gbproxy_reassign_tlli(&link_info->tlli,
- peer, new_bss_tlli);
- gbproxy_remove_matching_link_infos(peer, link_info);
- }
-
- gbproxy_remove_stale_link_infos(peer, now);
-
- return rc;
-}
-
-