714 lines
19 KiB
C
714 lines
19 KiB
C
/*
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* Message rewriting functionality
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*/
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/*
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* (C) 2010-2013 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2013 by On-Waves
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <openbsc/bsc_nat.h>
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#include <openbsc/bsc_nat_sccp.h>
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#include <openbsc/bsc_msc.h>
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#include <openbsc/gsm_data.h>
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#include <openbsc/debug.h>
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#include <openbsc/ipaccess.h>
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#include <openbsc/nat_rewrite_trie.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/gsm/gsm0808.h>
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#include <osmocom/gsm/ipa.h>
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#include <osmocom/gsm/protocol/gsm_08_08.h>
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#include <osmocom/gsm/protocol/gsm_04_11.h>
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#include <osmocom/sccp/sccp.h>
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static char *trie_lookup(struct nat_rewrite *trie, const char *number,
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regoff_t off, void *ctx)
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{
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struct nat_rewrite_rule *rule;
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if (!trie) {
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LOGP(DCC, LOGL_ERROR,
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"Asked to do a table lookup but no table.\n");
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return NULL;
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}
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rule = nat_rewrite_lookup(trie, number);
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if (!rule) {
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LOGP(DCC, LOGL_DEBUG,
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"Couldn't find a prefix rule for %s\n", number);
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return NULL;
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}
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return talloc_asprintf(ctx, "%s%s", rule->rewrite, &number[off]);
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}
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static char *match_and_rewrite_number(void *ctx, const char *number,
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const char *imsi, struct llist_head *list,
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struct nat_rewrite *trie)
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{
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struct bsc_nat_num_rewr_entry *entry;
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char *new_number = NULL;
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/* need to find a replacement and then fix it */
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llist_for_each_entry(entry, list, list) {
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regmatch_t matches[2];
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/* check the IMSI match */
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if (regexec(&entry->msisdn_reg, imsi, 0, NULL, 0) != 0)
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continue;
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/* this regexp matches... */
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if (regexec(&entry->num_reg, number, 2, matches, 0) == 0
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&& matches[1].rm_eo != -1) {
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if (entry->is_prefix_lookup)
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new_number = trie_lookup(trie, number,
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matches[1].rm_so, ctx);
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else
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new_number = talloc_asprintf(ctx, "%s%s",
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entry->replace,
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&number[matches[1].rm_so]);
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}
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if (new_number)
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break;
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}
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return new_number;
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}
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static char *rewrite_isdn_number(struct bsc_nat *nat, struct llist_head *rewr_list,
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void *ctx, const char *imsi,
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struct gsm_mncc_number *called)
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{
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char int_number[sizeof(called->number) + 2];
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char *number = called->number;
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if (llist_empty(&nat->num_rewr)) {
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LOGP(DCC, LOGL_DEBUG, "Rewrite rules empty.\n");
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return NULL;
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}
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/* only ISDN plan */
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if (called->plan != 1) {
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LOGP(DCC, LOGL_DEBUG, "Called plan is not 1 it was %d\n",
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called->plan);
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return NULL;
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}
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/* international, prepend */
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if (called->type == 1) {
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int_number[0] = '+';
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memcpy(&int_number[1], number, strlen(number) + 1);
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number = int_number;
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}
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return match_and_rewrite_number(ctx, number,
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imsi, rewr_list, nat->num_rewr_trie);
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}
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static void update_called_number(struct gsm_mncc_number *called,
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const char *chosen_number)
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{
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if (strncmp(chosen_number, "00", 2) == 0) {
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called->type = 1;
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strncpy(called->number, chosen_number + 2, sizeof(called->number));
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} else {
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/* rewrite international to unknown */
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if (called->type == 1)
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called->type = 0;
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strncpy(called->number, chosen_number, sizeof(called->number));
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}
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called->number[sizeof(called->number) - 1] = '\0';
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}
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/**
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* Rewrite non global numbers... according to rules based on the IMSI
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*/
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static struct msgb *rewrite_setup(struct bsc_nat *nat, struct msgb *msg,
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struct bsc_nat_parsed *parsed, const char *imsi,
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struct gsm48_hdr *hdr48, const uint32_t len)
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{
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struct tlv_parsed tp;
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unsigned int payload_len;
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struct gsm_mncc_number called;
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struct msgb *out;
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char *new_number_pre = NULL, *new_number_post = NULL, *chosen_number;
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uint8_t *outptr;
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const uint8_t *msgptr;
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int sec_len;
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/* decode and rewrite the message */
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payload_len = len - sizeof(*hdr48);
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tlv_parse(&tp, &gsm48_att_tlvdef, hdr48->data, payload_len, 0, 0);
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/* no number, well let us ignore it */
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if (!TLVP_PRESENT(&tp, GSM48_IE_CALLED_BCD))
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return NULL;
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memset(&called, 0, sizeof(called));
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gsm48_decode_called(&called,
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TLVP_VAL(&tp, GSM48_IE_CALLED_BCD) - 1);
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/* check if it looks international and stop */
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LOGP(DCC, LOGL_DEBUG,
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"Pre-Rewrite for IMSI(%s) Plan(%d) Type(%d) Number(%s)\n",
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imsi, called.plan, called.type, called.number);
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new_number_pre = rewrite_isdn_number(nat, &nat->num_rewr, msg, imsi, &called);
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if (!new_number_pre) {
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LOGP(DCC, LOGL_DEBUG, "No IMSI(%s) match found, returning message.\n",
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imsi);
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return NULL;
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}
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if (strlen(new_number_pre) > sizeof(called.number)) {
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LOGP(DCC, LOGL_ERROR, "Number %s is too long for structure.\n",
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new_number_pre);
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talloc_free(new_number_pre);
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return NULL;
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}
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update_called_number(&called, new_number_pre);
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/* another run through the re-write engine with other rules */
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LOGP(DCC, LOGL_DEBUG,
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"Post-Rewrite for IMSI(%s) Plan(%d) Type(%d) Number(%s)\n",
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imsi, called.plan, called.type, called.number);
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new_number_post = rewrite_isdn_number(nat, &nat->num_rewr_post, msg,
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imsi, &called);
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chosen_number = new_number_post ? new_number_post : new_number_pre;
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if (strlen(chosen_number) > sizeof(called.number)) {
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LOGP(DCC, LOGL_ERROR, "Number %s is too long for structure.\n",
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chosen_number);
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talloc_free(new_number_pre);
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talloc_free(new_number_post);
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return NULL;
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}
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/*
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* Need to create a new message now based on the old onew
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* with a new number. We can sadly not patch this in place
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* so we will need to regenerate it.
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*/
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out = msgb_alloc_headroom(4096, 128, "changed-setup");
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if (!out) {
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LOGP(DCC, LOGL_ERROR, "Failed to allocate.\n");
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talloc_free(new_number_pre);
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talloc_free(new_number_post);
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return NULL;
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}
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/* copy the header */
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outptr = msgb_put(out, sizeof(*hdr48));
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memcpy(outptr, hdr48, sizeof(*hdr48));
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/* copy everything up to the number */
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sec_len = TLVP_VAL(&tp, GSM48_IE_CALLED_BCD) - 2 - &hdr48->data[0];
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outptr = msgb_put(out, sec_len);
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memcpy(outptr, &hdr48->data[0], sec_len);
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/* create the new number */
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update_called_number(&called, chosen_number);
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LOGP(DCC, LOGL_DEBUG,
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"Chosen number for IMSI(%s) is Plan(%d) Type(%d) Number(%s)\n",
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imsi, called.plan, called.type, called.number);
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gsm48_encode_called(out, &called);
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/* copy thre rest */
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msgptr = TLVP_VAL(&tp, GSM48_IE_CALLED_BCD) +
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TLVP_LEN(&tp, GSM48_IE_CALLED_BCD);
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sec_len = payload_len - (msgptr - &hdr48->data[0]);
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outptr = msgb_put(out, sec_len);
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memcpy(outptr, msgptr, sec_len);
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talloc_free(new_number_pre);
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talloc_free(new_number_post);
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return out;
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}
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/**
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* Find a new SMSC address, returns an allocated string that needs to be
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* freed or is NULL.
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*/
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static char *find_new_smsc(struct bsc_nat *nat, void *ctx, const char *imsi,
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const char *smsc_addr, const char *dest_nr)
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{
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struct bsc_nat_num_rewr_entry *entry;
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char *new_number = NULL;
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uint8_t dest_match = llist_empty(&nat->tpdest_match);
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/* We will find a new number now */
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llist_for_each_entry(entry, &nat->smsc_rewr, list) {
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regmatch_t matches[2];
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/* check the IMSI match */
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if (regexec(&entry->msisdn_reg, imsi, 0, NULL, 0) != 0)
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continue;
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/* this regexp matches... */
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if (regexec(&entry->num_reg, smsc_addr, 2, matches, 0) == 0 &&
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matches[1].rm_eo != -1)
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new_number = talloc_asprintf(ctx, "%s%s",
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entry->replace,
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&smsc_addr[matches[1].rm_so]);
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if (new_number)
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break;
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}
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if (!new_number)
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return NULL;
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/*
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* now match the number against another list
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*/
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llist_for_each_entry(entry, &nat->tpdest_match, list) {
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/* check the IMSI match */
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if (regexec(&entry->msisdn_reg, imsi, 0, NULL, 0) != 0)
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continue;
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if (regexec(&entry->num_reg, dest_nr, 0, NULL, 0) == 0) {
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dest_match = 1;
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break;
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}
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}
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if (!dest_match) {
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talloc_free(new_number);
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return NULL;
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}
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return new_number;
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}
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/**
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* Clear the TP-SRR from the TPDU header
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*/
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static uint8_t sms_new_tpdu_hdr(struct bsc_nat *nat, const char *imsi,
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const char *dest_nr, uint8_t hdr)
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{
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struct bsc_nat_num_rewr_entry *entry;
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/* We will find a new number now */
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llist_for_each_entry(entry, &nat->sms_clear_tp_srr, list) {
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/* check the IMSI match */
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if (regexec(&entry->msisdn_reg, imsi, 0, NULL, 0) != 0)
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continue;
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if (regexec(&entry->num_reg, dest_nr, 0, NULL, 0) != 0)
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continue;
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/* matched phone number and imsi */
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return hdr & ~0x20;
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}
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return hdr;
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}
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/**
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* Check if we need to rewrite the number. For this SMS.
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*/
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static char *sms_new_dest_nr(struct bsc_nat *nat, void *ctx,
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const char *imsi, const char *dest_nr)
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{
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return match_and_rewrite_number(ctx, dest_nr, imsi,
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&nat->sms_num_rewr, NULL);
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}
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/**
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* This is a helper for GSM 04.11 8.2.5.2 Destination address element
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*/
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void sms_encode_addr_element(struct msgb *out, const char *new_number,
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int format, int tp_data)
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{
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uint8_t new_addr_len;
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uint8_t new_addr[26];
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/*
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* Copy the new number. We let libosmocore encode it, then set
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* the extension followed after the length. Depending on if
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* we want to write RP we will let the TLV code add the
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* length for us or we need to use strlen... This is not very clear
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* as of 03.40 and 04.11.
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*/
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new_addr_len = gsm48_encode_bcd_number(new_addr, ARRAY_SIZE(new_addr),
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1, new_number);
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new_addr[1] = format;
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if (tp_data) {
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uint8_t *data = msgb_put(out, new_addr_len);
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memcpy(data, new_addr, new_addr_len);
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data[0] = strlen(new_number);
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} else {
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msgb_lv_put(out, new_addr_len - 1, new_addr + 1);
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}
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}
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static struct msgb *sms_create_new(uint8_t type, uint8_t ref,
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struct gsm48_hdr *old_hdr48,
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const uint8_t *orig_addr_ptr,
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int orig_addr_len, const char *new_number,
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const uint8_t *data_ptr, int data_len,
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uint8_t tpdu_first_byte,
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const int old_dest_len, const char *new_dest_nr)
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{
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struct gsm48_hdr *new_hdr48;
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struct msgb *out;
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/*
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* We need to re-create the patched structure. This is why we have
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* saved the above pointers.
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*/
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out = msgb_alloc_headroom(4096, 128, "changed-smsc");
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if (!out) {
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LOGP(DNAT, LOGL_ERROR, "Failed to allocate.\n");
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return NULL;
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}
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out->l2h = out->data;
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msgb_v_put(out, GSM411_MT_RP_DATA_MO);
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msgb_v_put(out, ref);
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msgb_lv_put(out, orig_addr_len, orig_addr_ptr);
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sms_encode_addr_element(out, new_number, 0x91, 0);
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/* Patch the TPDU from here on */
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/**
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* Do we need to put a new TP-Destination-Address (TP-DA) here or
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* can we copy the old thing? For the TP-DA we need to find out the
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* new size.
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*/
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if (new_dest_nr) {
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uint8_t *data, *new_size;
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/* reserve the size and write the header */
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new_size = msgb_put(out, 1);
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out->l3h = new_size + 1;
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msgb_v_put(out, tpdu_first_byte);
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msgb_v_put(out, data_ptr[1]);
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/* encode the new number and put it */
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if (strncmp(new_dest_nr, "00", 2) == 0)
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sms_encode_addr_element(out, new_dest_nr + 2, 0x91, 1);
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else
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sms_encode_addr_element(out, new_dest_nr, 0x81, 1);
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/* Copy the rest after the TP-DS */
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data = msgb_put(out, data_len - 2 - 1 - old_dest_len);
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memcpy(data, &data_ptr[2 + 1 + old_dest_len], data_len - 2 - 1 - old_dest_len);
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/* fill in the new size */
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new_size[0] = msgb_l3len(out);
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} else {
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msgb_v_put(out, data_len);
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msgb_tv_fixed_put(out, tpdu_first_byte, data_len - 1, &data_ptr[1]);
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}
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/* prepend GSM 04.08 header */
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new_hdr48 = (struct gsm48_hdr *) msgb_push(out, sizeof(*new_hdr48) + 1);
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memcpy(new_hdr48, old_hdr48, sizeof(*old_hdr48));
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new_hdr48->data[0] = msgb_l2len(out);
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return out;
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}
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/**
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* Parse the SMS and check if it needs to be rewritten
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*/
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static struct msgb *rewrite_sms(struct bsc_nat *nat, struct msgb *msg,
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struct bsc_nat_parsed *parsed, const char *imsi,
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struct gsm48_hdr *hdr48, const uint32_t len)
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{
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unsigned int payload_len;
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unsigned int cp_len;
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uint8_t ref;
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uint8_t orig_addr_len, *orig_addr_ptr;
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uint8_t dest_addr_len, *dest_addr_ptr;
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uint8_t data_len, *data_ptr;
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char smsc_addr[30];
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uint8_t dest_len, orig_dest_len;
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char _dest_nr[30];
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char *dest_nr;
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char *new_dest_nr;
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char *new_number = NULL;
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uint8_t tpdu_hdr;
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struct msgb *out;
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payload_len = len - sizeof(*hdr48);
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if (payload_len < 1) {
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LOGP(DNAT, LOGL_ERROR, "SMS too short for things. %d\n", payload_len);
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return NULL;
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}
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cp_len = hdr48->data[0];
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if (payload_len + 1 < cp_len) {
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LOGP(DNAT, LOGL_ERROR, "SMS RPDU can not fit in: %d %d\n", cp_len, payload_len);
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return NULL;
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}
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if (hdr48->data[1] != GSM411_MT_RP_DATA_MO)
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return NULL;
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if (cp_len < 5) {
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LOGP(DNAT, LOGL_ERROR, "RD-DATA can not fit in the CP len: %d\n", cp_len);
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return NULL;
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}
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/* RP */
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ref = hdr48->data[2];
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orig_addr_len = hdr48->data[3];
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orig_addr_ptr = &hdr48->data[4];
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|
|
/* the +1 is for checking if the following element has some space */
|
|
if (cp_len < 3 + orig_addr_len + 1) {
|
|
LOGP(DNAT, LOGL_ERROR, "RP-Originator addr does not fit: %d\n", orig_addr_len);
|
|
return NULL;
|
|
}
|
|
|
|
dest_addr_len = hdr48->data[3 + orig_addr_len + 1];
|
|
dest_addr_ptr = &hdr48->data[3 + orig_addr_len + 2];
|
|
|
|
if (cp_len < 3 + orig_addr_len + 1 + dest_addr_len + 1) {
|
|
LOGP(DNAT, LOGL_ERROR, "RP-Destination addr does not fit: %d\n", dest_addr_len);
|
|
return NULL;
|
|
}
|
|
gsm48_decode_bcd_number(smsc_addr, ARRAY_SIZE(smsc_addr), dest_addr_ptr - 1, 1);
|
|
|
|
data_len = hdr48->data[3 + orig_addr_len + 1 + dest_addr_len + 1];
|
|
data_ptr = &hdr48->data[3 + orig_addr_len + 1 + dest_addr_len + 2];
|
|
|
|
if (cp_len < 3 + orig_addr_len + 1 + dest_addr_len + 1 + data_len) {
|
|
LOGP(DNAT, LOGL_ERROR, "RP-Data does not fit: %d\n", data_len);
|
|
return NULL;
|
|
}
|
|
|
|
if (data_len < 3) {
|
|
LOGP(DNAT, LOGL_ERROR, "SMS-SUBMIT is too short.\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* TP-PDU starts here */
|
|
if ((data_ptr[0] & 0x03) != GSM340_SMS_SUBMIT_MS2SC)
|
|
return NULL;
|
|
|
|
/*
|
|
* look into the phone number. The length is in semi-octets, we will
|
|
* need to add the byte for the number type as well.
|
|
*/
|
|
orig_dest_len = data_ptr[2];
|
|
dest_len = ((orig_dest_len + 1) / 2) + 1;
|
|
if (data_len < dest_len + 3 || dest_len < 2) {
|
|
LOGP(DNAT, LOGL_ERROR, "SMS-SUBMIT can not have TP-DestAddr.\n");
|
|
return NULL;
|
|
}
|
|
|
|
if ((data_ptr[3] & 0x80) == 0) {
|
|
LOGP(DNAT, LOGL_ERROR, "TP-DestAddr has extension. Not handled.\n");
|
|
return NULL;
|
|
}
|
|
|
|
if ((data_ptr[3] & 0x0F) == 0) {
|
|
LOGP(DNAT, LOGL_ERROR, "TP-DestAddr is of unknown type.\n");
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Besides of what I think I read in GSM 03.40 and 04.11 the TP-DA
|
|
* contains the semi-octets as length (strlen), change it to the
|
|
* the number of bytes, but then change it back.
|
|
*/
|
|
data_ptr[2] = dest_len;
|
|
gsm48_decode_bcd_number(_dest_nr + 2, ARRAY_SIZE(_dest_nr) - 2,
|
|
&data_ptr[2], 1);
|
|
data_ptr[2] = orig_dest_len;
|
|
if ((data_ptr[3] & 0x70) == 0x10) {
|
|
_dest_nr[0] = _dest_nr[1] = '0';
|
|
dest_nr = &_dest_nr[0];
|
|
} else {
|
|
dest_nr = &_dest_nr[2];
|
|
}
|
|
|
|
/**
|
|
* Call functions to rewrite the data
|
|
*/
|
|
tpdu_hdr = sms_new_tpdu_hdr(nat, imsi, dest_nr, data_ptr[0]);
|
|
new_number = find_new_smsc(nat, msg, imsi, smsc_addr, dest_nr);
|
|
new_dest_nr = sms_new_dest_nr(nat, msg, imsi, dest_nr);
|
|
|
|
if (tpdu_hdr == data_ptr[0] && !new_number && !new_dest_nr)
|
|
return NULL;
|
|
|
|
out = sms_create_new(GSM411_MT_RP_DATA_MO, ref, hdr48,
|
|
orig_addr_ptr, orig_addr_len,
|
|
new_number ? new_number : smsc_addr,
|
|
data_ptr, data_len, tpdu_hdr,
|
|
dest_len, new_dest_nr);
|
|
talloc_free(new_number);
|
|
talloc_free(new_dest_nr);
|
|
return out;
|
|
}
|
|
|
|
struct msgb *bsc_nat_rewrite_msg(struct bsc_nat *nat, struct msgb *msg, struct bsc_nat_parsed *parsed, const char *imsi)
|
|
{
|
|
struct gsm48_hdr *hdr48;
|
|
uint32_t len;
|
|
uint8_t msg_type, proto;
|
|
struct msgb *new_msg = NULL, *sccp;
|
|
uint8_t link_id;
|
|
|
|
if (!imsi || strlen(imsi) < 5)
|
|
return msg;
|
|
|
|
/* only care about DTAP messages */
|
|
if (parsed->bssap != BSSAP_MSG_DTAP)
|
|
return msg;
|
|
if (!parsed->dest_local_ref)
|
|
return msg;
|
|
|
|
hdr48 = bsc_unpack_dtap(parsed, msg, &len);
|
|
if (!hdr48)
|
|
return msg;
|
|
|
|
link_id = msg->l3h[1];
|
|
proto = hdr48->proto_discr & 0x0f;
|
|
msg_type = hdr48->msg_type & 0xbf;
|
|
|
|
if (proto == GSM48_PDISC_CC && msg_type == GSM48_MT_CC_SETUP)
|
|
new_msg = rewrite_setup(nat, msg, parsed, imsi, hdr48, len);
|
|
else if (proto == GSM48_PDISC_SMS && msg_type == GSM411_MT_CP_DATA)
|
|
new_msg = rewrite_sms(nat, msg, parsed, imsi, hdr48, len);
|
|
|
|
if (!new_msg)
|
|
return msg;
|
|
|
|
/* wrap with DTAP, SCCP, then IPA. TODO: Stop copying */
|
|
gsm0808_prepend_dtap_header(new_msg, link_id);
|
|
sccp = sccp_create_dt1(parsed->dest_local_ref, new_msg->data, new_msg->len);
|
|
talloc_free(new_msg);
|
|
|
|
if (!sccp) {
|
|
LOGP(DNAT, LOGL_ERROR, "Failed to allocate.\n");
|
|
return msg;
|
|
}
|
|
|
|
ipa_prepend_header(sccp, IPAC_PROTO_SCCP);
|
|
|
|
/* the parsed hangs off from msg but it needs to survive */
|
|
talloc_steal(sccp, parsed);
|
|
msgb_free(msg);
|
|
return sccp;
|
|
}
|
|
|
|
static void num_rewr_free_data(struct bsc_nat_num_rewr_entry *entry)
|
|
{
|
|
regfree(&entry->msisdn_reg);
|
|
regfree(&entry->num_reg);
|
|
talloc_free(entry->replace);
|
|
}
|
|
|
|
void bsc_nat_num_rewr_entry_adapt(void *ctx, struct llist_head *head,
|
|
const struct osmo_config_list *list)
|
|
{
|
|
struct bsc_nat_num_rewr_entry *entry, *tmp;
|
|
struct osmo_config_entry *cfg_entry;
|
|
|
|
/* free the old data */
|
|
llist_for_each_entry_safe(entry, tmp, head, list) {
|
|
num_rewr_free_data(entry);
|
|
llist_del(&entry->list);
|
|
talloc_free(entry);
|
|
}
|
|
|
|
|
|
if (!list)
|
|
return;
|
|
|
|
llist_for_each_entry(cfg_entry, &list->entry, list) {
|
|
char *regexp;
|
|
if (cfg_entry->text[0] == '+') {
|
|
LOGP(DNAT, LOGL_ERROR,
|
|
"Plus is not allowed in the number\n");
|
|
continue;
|
|
}
|
|
|
|
entry = talloc_zero(ctx, struct bsc_nat_num_rewr_entry);
|
|
if (!entry) {
|
|
LOGP(DNAT, LOGL_ERROR,
|
|
"Allocation of the num_rewr entry failed.\n");
|
|
continue;
|
|
}
|
|
|
|
entry->replace = talloc_strdup(entry, cfg_entry->text);
|
|
if (!entry->replace) {
|
|
LOGP(DNAT, LOGL_ERROR,
|
|
"Failed to copy the replacement text.\n");
|
|
talloc_free(entry);
|
|
continue;
|
|
}
|
|
|
|
if (strcmp("prefix_lookup", entry->replace) == 0)
|
|
entry->is_prefix_lookup = 1;
|
|
|
|
/* we will now build a regexp string */
|
|
if (cfg_entry->mcc[0] == '^') {
|
|
regexp = talloc_strdup(entry, cfg_entry->mcc);
|
|
} else {
|
|
regexp = talloc_asprintf(entry, "^%s%s",
|
|
cfg_entry->mcc[0] == '*' ?
|
|
"[0-9][0-9][0-9]" : cfg_entry->mcc,
|
|
cfg_entry->mnc[0] == '*' ?
|
|
"[0-9][0-9]" : cfg_entry->mnc);
|
|
}
|
|
|
|
if (!regexp) {
|
|
LOGP(DNAT, LOGL_ERROR, "Failed to create a regexp string.\n");
|
|
talloc_free(entry);
|
|
continue;
|
|
}
|
|
|
|
if (regcomp(&entry->msisdn_reg, regexp, 0) != 0) {
|
|
LOGP(DNAT, LOGL_ERROR,
|
|
"Failed to compile regexp '%s'\n", regexp);
|
|
talloc_free(regexp);
|
|
talloc_free(entry);
|
|
continue;
|
|
}
|
|
|
|
talloc_free(regexp);
|
|
if (regcomp(&entry->num_reg, cfg_entry->option, REG_EXTENDED) != 0) {
|
|
LOGP(DNAT, LOGL_ERROR,
|
|
"Failed to compile regexp '%s'\n", cfg_entry->option);
|
|
regfree(&entry->msisdn_reg);
|
|
talloc_free(entry);
|
|
continue;
|
|
}
|
|
|
|
/* we have copied the number */
|
|
llist_add_tail(&entry->list, head);
|
|
}
|
|
}
|