1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010 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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <openbsc/bsc_nat.h>
#include <openbsc/gsm_data.h>
#include <openbsc/bssap.h>
#include <openbsc/debug.h>
#include <openbsc/mgcp.h>
#include <openbsc/mgcp_internal.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int bsc_mgcp_assign(struct sccp_connections *con, struct msgb *msg)
{
struct tlv_parsed tp;
u_int16_t cic;
u_int8_t timeslot;
u_int8_t multiplex;
if (!msg->l3h) {
LOGP(DNAT, LOGL_ERROR, "Assignment message should have l3h pointer.\n");
return -1;
}
if (msgb_l3len(msg) < 3) {
LOGP(DNAT, LOGL_ERROR, "Assignment message has not enough space for GSM0808.\n");
return -1;
}
tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0);
if (!TLVP_PRESENT(&tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE)) {
LOGP(DNAT, LOGL_ERROR, "Circuit identity code not found in assignment message.\n");
return -1;
}
cic = ntohs(*(u_int16_t *)TLVP_VAL(&tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE));
timeslot = cic & 0x1f;
multiplex = (cic & ~0x1f) >> 5;
con->msc_timeslot = (32 * multiplex) + timeslot;
con->bsc_timeslot = con->msc_timeslot;
return 0;
}
void bsc_mgcp_clear(struct sccp_connections *con)
{
con->msc_timeslot = -1;
con->bsc_timeslot = -1;
}
void bsc_mgcp_free_endpoints(struct bsc_nat *nat)
{
int i;
for (i = 1; i < nat->mgcp_cfg->number_endpoints; ++i)
mgcp_free_endp(&nat->mgcp_cfg->endpoints[i]);
}
|
