FreeCalypso > hg > themwi-system-sw

annotate mgw/pstn2gsm.c @ 251:df2726b88034

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
top Makefile: sip-in changed to use libnumdb2
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 14 Aug 2023 23:43:28 -0800
parents 0047c4c08d9e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * In this module we implement our RTP gateway function
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * in the PSTN to GSM direction.
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 */
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 #include <sys/types.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <sys/socket.h>
127
f062c32a5116 mgw: implement DTMF
Mychaela Falconia <falcon@freecalypso.org>
parents: 102
diff changeset
8 #include <sys/time.h>
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <netinet/in.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <stdio.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include <stdint.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 #include <stdlib.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 #include <string.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 #include <strings.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 #include <syslog.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 #include <unistd.h>
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 #include <gsm.h> /* libgsm dependency */
174
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
18 #include <gsm_efr.h>
198
cf1ba5d65188 mgw: start using project-global rtp_defs.h
Mychaela Falconia <falcon@freecalypso.org>
parents: 174
diff changeset
19 #include "../include/rtp_defs.h"
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 #include "../include/tmgw_ctrl.h"
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "../include/tmgw_const.h"
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 #include "struct.h"
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 #include "select.h"
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 #include "int_defs.h"
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 extern uint16_t pcmu_decode_table[256];
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 extern uint16_t pcma_decode_table[256];
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #define ERR_WRONG_UDP_SRC 0x0001
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #define ERR_BAD_RTP_PACKET 0x0002
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #define ERR_SSRC_CHANGE 0x0004
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 #define ERR_SEQ_BREAK 0x0008
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 #define ERR_TSTAMP_BREAK 0x0010
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 void
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 pstn2gsm_rtp_in(in_fd, ep)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 struct endpoint *ep;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 struct rtp_packet pkt;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 struct sockaddr_in sin_from;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 socklen_t addrlen;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 uint16_t *pcm_dec_table;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 int16_t seq_delta;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 int32_t ts_delta;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 int16_t pcm_samples[SAMPLES_PER_FRAME];
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 unsigned n;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 int rc, m_out;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 addrlen = sizeof(struct sockaddr_in);
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 rc = recvfrom(in_fd, &pkt, sizeof pkt, 0,
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 (struct sockaddr *) &sin_from, &addrlen);
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 if (rc < 0)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 return;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 if (sin_from.sin_addr.s_addr != ep->rtp_pstn.remote_addr.sin_addr.s_addr
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 || sin_from.sin_port != ep->rtp_pstn.remote_addr.sin_port) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 if (!(ep->p2g_err_flags & ERR_WRONG_UDP_SRC)) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 syslog(LOG_ERR,
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 "PSTN RTP ep got UDP packet from wrong source");
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 ep->p2g_err_flags |= ERR_WRONG_UDP_SRC;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 return;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 if (rc != RTP_PACKET_SIZE_PSTN) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 bad_rtp_pkt: if (!(ep->p2g_err_flags & ERR_BAD_RTP_PACKET)) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 syslog(LOG_ERR, "Rx bad RTP packet on PSTN side");
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 ep->p2g_err_flags |= ERR_BAD_RTP_PACKET;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 return;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 if (pkt.v_p_x_cc != 0x80)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 goto bad_rtp_pkt;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 switch (pkt.m_pt & 0x7F) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 case PSTN_CODEC_PCMU:
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 pcm_dec_table = pcmu_decode_table;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 break;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 case PSTN_CODEC_PCMA:
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 pcm_dec_table = pcma_decode_table;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 break;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 default:
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 goto bad_rtp_pkt;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 if (ep->p2g_state && pkt.ssrc != ep->p2g_ssrc) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 if (!(ep->p2g_err_flags & ERR_SSRC_CHANGE)) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 syslog(LOG_ERR, "PSTN RTP stream changed SSRC");
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 ep->p2g_err_flags |= ERR_SSRC_CHANGE;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 ep->p2g_state = 0;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 if (ep->p2g_state) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 seq_delta = ntohs(pkt.seq) - ep->p2g_last_seq;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 ts_delta = ntohl(pkt.tstamp) - ep->p2g_last_ts;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 if (seq_delta <= 0)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 return; /* discard old or duplicate */
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 if (seq_delta != 1) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 if (!(ep->p2g_err_flags & ERR_SEQ_BREAK)) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 syslog(LOG_ERR, "PSTN RTP stream seq break");
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 ep->p2g_err_flags |= ERR_SEQ_BREAK;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 m_out = 1;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 } else if (ts_delta != SAMPLES_PER_FRAME) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 if (!(ep->p2g_err_flags & ERR_TSTAMP_BREAK)) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 syslog(LOG_ERR, "PSTN RTP stream tstamp break");
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 ep->p2g_err_flags |= ERR_TSTAMP_BREAK;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 m_out = 1;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 } else
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 m_out = 0;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 } else
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 m_out = 1;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 ep->p2g_state = 1;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 ep->p2g_ssrc = pkt.ssrc;
96
f24bbfd23c9d mgw p2g: outgoing seq numbers, forwarding control
Mychaela Falconia <falcon@freecalypso.org>
parents: 95
diff changeset
112 ep->p2g_last_ts = ntohl(pkt.tstamp);
f24bbfd23c9d mgw p2g: outgoing seq numbers, forwarding control
Mychaela Falconia <falcon@freecalypso.org>
parents: 95
diff changeset
113 ep->p2g_last_seq = ntohs(pkt.seq);
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 /* actual transcoding and forwarding */
97
9aed16c30622 mgw p2g: set M bit when restarting forwarding after no-forward
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
115 if (!(ep->fwd_mode & TMGW_FWD_ENABLE_PSTN2GSM)) {
9aed16c30622 mgw p2g: set M bit when restarting forwarding after no-forward
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
116 ep->p2g_drop_flag = 1;
96
f24bbfd23c9d mgw p2g: outgoing seq numbers, forwarding control
Mychaela Falconia <falcon@freecalypso.org>
parents: 95
diff changeset
117 return;
97
9aed16c30622 mgw p2g: set M bit when restarting forwarding after no-forward
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
118 }
9aed16c30622 mgw p2g: set M bit when restarting forwarding after no-forward
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
119 if (ep->p2g_drop_flag) {
9aed16c30622 mgw p2g: set M bit when restarting forwarding after no-forward
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
120 ep->p2g_drop_flag = 0;
9aed16c30622 mgw p2g: set M bit when restarting forwarding after no-forward
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
121 m_out = 1;
9aed16c30622 mgw p2g: set M bit when restarting forwarding after no-forward
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
122 }
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 for (n = 0; n < SAMPLES_PER_FRAME; n++)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 pcm_samples[n] = pcm_dec_table[pkt.payload[n]];
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 pkt.m_pt = ep->gsm_payload_type;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 if (m_out)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 pkt.m_pt |= 0x80;
96
f24bbfd23c9d mgw p2g: outgoing seq numbers, forwarding control
Mychaela Falconia <falcon@freecalypso.org>
parents: 95
diff changeset
128 pkt.seq = htons(++ep->p2g_out_seq);
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 switch (ep->gsm_payload_msg_type) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 case GSM_TCHF_FRAME:
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 gsm_encode(ep->gsm_encoder_state, pcm_samples, pkt.payload);
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 break;
174
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
133 case GSM_TCHF_FRAME_EFR:
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
134 EFR_encode_frame(ep->gsm_encoder_state, pcm_samples,
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
135 pkt.payload, (int *) 0, (int *) 0);
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
136 break;
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 addrlen = sizeof(struct sockaddr_in);
205
0047c4c08d9e mgw: accept the new TRAUlike RTP format
Mychaela Falconia <falcon@freecalypso.org>
parents: 198
diff changeset
139 sendto(ep->rtp_gsm.rtp_fd, &pkt,
0047c4c08d9e mgw: accept the new TRAUlike RTP format
Mychaela Falconia <falcon@freecalypso.org>
parents: 198
diff changeset
140 RTP_PACKET_HDR_SIZE + ep->gsm_payload_len, 0,
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 (struct sockaddr *) &ep->rtp_gsm.remote_addr, addrlen);
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 pstn2gsm_init(ep)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 struct endpoint *ep;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 {
102
d26d97974c8a mgw p2g init: fix bug in forwarding re-enable scenario
Mychaela Falconia <falcon@freecalypso.org>
parents: 100
diff changeset
147 if (ep->gsm_encoder_state)
d26d97974c8a mgw p2g init: fix bug in forwarding re-enable scenario
Mychaela Falconia <falcon@freecalypso.org>
parents: 100
diff changeset
148 return TMGW_RESP_OK;
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 switch (ep->gsm_payload_msg_type) {
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 case GSM_TCHF_FRAME:
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 ep->gsm_encoder_state = gsm_create();
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 if (!ep->gsm_encoder_state)
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 return TMGW_RESP_ERR_RSRC;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 break;
174
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
155 case GSM_TCHF_FRAME_EFR:
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
156 ep->gsm_encoder_state = EFR_encoder_create(0);
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
157 if (!ep->gsm_encoder_state)
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
158 return TMGW_RESP_ERR_RSRC;
c985c33baeac mgw: support EFR by way of libgsmefr
Mychaela Falconia <falcon@freecalypso.org>
parents: 127
diff changeset
159 break;
95
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 select_handlers[ep->rtp_pstn.rtp_fd] = pstn2gsm_rtp_in;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 return TMGW_RESP_OK;
f280328e7e2e themwi-mgw: initial implementation of PSTN to GSM forwarding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 }