2010-06-15 10:49:53 +00:00
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/*
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* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010 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 General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <openbsc/bsc_nat.h>
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#include <openbsc/gsm_data.h>
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#include <openbsc/bssap.h>
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#include <openbsc/debug.h>
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2010-03-31 07:16:56 +00:00
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#include <openbsc/mgcp.h>
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#include <openbsc/mgcp_internal.h>
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2010-06-15 10:49:53 +00:00
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#include <netinet/in.h>
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#include <arpa/inet.h>
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int bsc_mgcp_assign(struct sccp_connections *con, struct msgb *msg)
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{
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struct tlv_parsed tp;
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u_int16_t cic;
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u_int8_t timeslot;
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u_int8_t multiplex;
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if (!msg->l3h) {
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LOGP(DNAT, LOGL_ERROR, "Assignment message should have l3h pointer.\n");
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return -1;
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}
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if (msgb_l3len(msg) < 3) {
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LOGP(DNAT, LOGL_ERROR, "Assignment message has not enough space for GSM0808.\n");
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return -1;
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}
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tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0);
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if (!TLVP_PRESENT(&tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE)) {
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LOGP(DNAT, LOGL_ERROR, "Circuit identity code not found in assignment message.\n");
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return -1;
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}
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cic = ntohs(*(u_int16_t *)TLVP_VAL(&tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE));
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timeslot = cic & 0x1f;
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multiplex = (cic & ~0x1f) >> 5;
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con->msc_timeslot = (32 * multiplex) + timeslot;
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con->bsc_timeslot = con->msc_timeslot;
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return 0;
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}
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void bsc_mgcp_clear(struct sccp_connections *con)
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{
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con->msc_timeslot = -1;
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con->bsc_timeslot = -1;
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}
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2010-03-31 07:16:56 +00:00
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void bsc_mgcp_free_endpoints(struct bsc_nat *nat)
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{
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int i;
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for (i = 1; i < nat->mgcp_cfg->number_endpoints; ++i)
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mgcp_free_endp(&nat->mgcp_cfg->endpoints[i]);
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}
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