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annotate pcap-study/rtp-gsmfr-extr.c @ 17:ab18adf989e3 default tip

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pcm-study: new program pcm16-frag-extr
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 29 Oct 2024 00:32:33 +0000
parents e686bc92c7d8
children
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1 /*
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2 * This program reads a pcap file, extracts packets belonging to a
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3 * particular RTP stream as identified by a source or destination
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4 * IP:port, verifies that an unbroken RTP stream is present, in
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5 * GSM FR or EFR codec, and writes the FR/EFR frame stream to our
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6 * extended-libgsm format binary file, to be fed to decoding test
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7 * programs.
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8 */
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9
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10 #include <sys/types.h>
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11 #include <sys/socket.h>
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12 #include <netinet/in.h>
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13 #include <arpa/inet.h>
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16 #include <string.h>
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17 #include <strings.h>
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18 #include <pcap/pcap.h>
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19
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20 static pcap_t *pcap;
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21 static in_addr_t match_ip_addr;
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22 static u_short match_udp_port;
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23 static unsigned iphdr_addr_offset, udphdr_port_offset;
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24 static unsigned link_hdr_len, ethertype_offset;
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25 static FILE *outfile;
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26 static int stream_init_flag;
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27 static unsigned last_seq, last_tstamp, stream_ssrc;
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28
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29 static void
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30 check_dl_type()
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31 {
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32 int dltype;
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33
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34 dltype = pcap_datalink(pcap);
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35 switch (dltype) {
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36 case DLT_EN10MB:
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37 link_hdr_len = 14;
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38 ethertype_offset = 12;
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39 break;
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40 case DLT_RAW:
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41 link_hdr_len = 0;
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42 break;
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43 case DLT_LINUX_SLL:
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44 link_hdr_len = 16;
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45 ethertype_offset = 14;
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46 break;
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47 default:
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48 fprintf(stderr, "error: unsupported data link type %d\n",
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49 dltype);
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50 exit(1);
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51 }
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52 }
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53
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54 static void
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55 rtp_stream_logic(rtp_hdr, pkt_idx)
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56 u_char *rtp_hdr;
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57 unsigned pkt_idx;
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58 {
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59 unsigned cur_seq, cur_tstamp, cur_ssrc;
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60
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61 cur_seq = (rtp_hdr[2] << 8) | rtp_hdr[3];
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62 cur_tstamp = (rtp_hdr[4] << 24) | (rtp_hdr[5] << 16) |
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63 (rtp_hdr[6] << 8) | rtp_hdr[7];
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64 cur_ssrc = (rtp_hdr[8] << 24) | (rtp_hdr[9] << 16) |
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65 (rtp_hdr[10] << 8) | rtp_hdr[11];
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66 if (stream_init_flag) {
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67 if (cur_ssrc != stream_ssrc) {
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68 fprintf(stderr,
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69 "error in packet #%u: SSRC change from 0x%08X to 0x%08X\n",
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70 pkt_idx, stream_ssrc, cur_ssrc);
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71 exit(1);
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72 }
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73 if (cur_seq != last_seq + 1 &&
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74 (cur_seq != 0 || last_seq != 0xFFFF)) {
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75 fprintf(stderr,
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76 "error in packet #%u: seq break from 0x%04X to 0x%04X\n",
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77 pkt_idx, last_seq, cur_seq);
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78 exit(1);
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79 }
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80 if (cur_tstamp != last_tstamp + 160) {
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81 fprintf(stderr,
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82 "error in packet #%u: timestamp break from 0x%08X to 0x%08X\n",
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83 pkt_idx, last_tstamp, cur_tstamp);
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84 exit(1);
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85 }
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86 } else {
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87 stream_init_flag = 1;
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88 stream_ssrc = cur_ssrc;
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89 }
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90 last_seq = cur_seq;
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91 last_tstamp = cur_tstamp;
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92 }
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93
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94 static void
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95 process_packet(pkt, caplen, pkt_idx)
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96 u_char *pkt;
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97 unsigned caplen, pkt_idx;
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98 {
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99 unsigned udplen, payload_len;
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
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100 u_char synth_bfi[2];
0
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101
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102 if (caplen < link_hdr_len + 28)
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103 return;
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104 if (link_hdr_len) {
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105 if (pkt[ethertype_offset] != 0x08)
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106 return;
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107 if (pkt[ethertype_offset+1] != 0x00)
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108 return;
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109 pkt += link_hdr_len;
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110 caplen -= link_hdr_len;
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111 }
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112 /* check IP header */
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113 if (pkt[0] != 0x45)
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114 return;
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115 if (pkt[9] != 17) /* UDP */
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116 return;
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117 if (bcmp(pkt + iphdr_addr_offset, &match_ip_addr, 4))
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118 return;
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119 /* check UDP header */
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120 if (bcmp(pkt + 20 + udphdr_port_offset, &match_udp_port, 2))
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121 return;
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122 /* it is our target - now scrutinize it */
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123 udplen = (pkt[24] << 8) | pkt[25];
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124 if (caplen < udplen + 20) {
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125 fprintf(stderr,
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126 "error: packet #%u is truncated in the capture\n",
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127 pkt_idx);
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128 exit(1);
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129 }
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130 if (udplen < 20) {
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131 fprintf(stderr,
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parents:
diff changeset
132 "error in packet #%u: UDP length is too short for RTP header\n",
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 pkt_idx);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 if (pkt[28] != 0x80) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 fprintf(stderr,
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 "error in packet #%u: unsupported RTP header structure\n",
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 pkt_idx);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 rtp_stream_logic(pkt + 28, pkt_idx);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 payload_len = udplen - 20;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 switch (payload_len) {
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
145 case 0:
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
146 synth_bfi[0] = 0xBF;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
147 synth_bfi[1] = 0;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
148 emit_synth_bfi:
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
149 fwrite(synth_bfi, 1, 2, outfile);
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
150 return;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
151 case 1:
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
152 if ((pkt[40] & 0xF6) != 0xE6)
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
153 break;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
154 traulike_bfi:
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
155 synth_bfi[0] = 0xBF;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
156 synth_bfi[1] = pkt[40] & 1;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
157 goto emit_synth_bfi;
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 case 2:
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
159 if (pkt[40] != 0xBF)
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 break;
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
161 emit_payload:
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
162 fwrite(pkt + 40, 1, payload_len, outfile);
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
163 return;
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 case 31:
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
165 if ((pkt[40] & 0xF0) != 0xC0)
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
166 break;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
167 goto emit_payload;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
168 case 32:
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
169 if ((pkt[40] & 0xF4) != 0xE0)
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 break;
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
171 if ((pkt[41] & 0xF0) != 0xC0)
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
172 break;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
173 if (pkt[40] & 2)
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
174 goto traulike_bfi;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
175 fwrite(pkt + 41, 1, 31, outfile);
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
176 return;
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 case 33:
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
178 if ((pkt[40] & 0xF0) != 0xD0)
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
179 break;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
180 goto emit_payload;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
181 case 34:
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
182 if ((pkt[40] & 0xF4) != 0xE0)
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
183 break;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
184 if ((pkt[41] & 0xF0) != 0xD0)
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 break;
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
186 if (pkt[40] & 2)
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
187 goto traulike_bfi;
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
188 fwrite(pkt + 41, 1, 33, outfile);
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
189 return;
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 }
2
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
191 fprintf(stderr, "error in packet #%u: unsupported payload\n", pkt_idx);
210dfa39f573 rtp-gsmfr-extr: support new TRAUlike RTP payload format
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
192 exit(1);
0
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 main(argc, argv)
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 char **argv;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 char errbuf[PCAP_ERRBUF_SIZE];
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 u_char *pkt;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 struct pcap_pkthdr pkthdr;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 unsigned pkt_idx;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 if (argc != 6) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 fprintf(stderr,
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 "usage: %s pcap-file src|dest ip-addr udp-port outfile\n",
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 argv[0]);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 pcap = pcap_open_offline(argv[1], errbuf);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 if (!pcap) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 fprintf(stderr, "%s: %s\n", argv[1], errbuf);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 check_dl_type();
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 if (!strcmp(argv[2], "src")) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 iphdr_addr_offset = 12;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 udphdr_port_offset = 0;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 } else if (!strcmp(argv[2], "dest")) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 iphdr_addr_offset = 16;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 udphdr_port_offset = 2;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 } else {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 fprintf(stderr,
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 "error: direction argument must be \"src\" or \"dest\"\n");
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 match_ip_addr = inet_addr(argv[3]);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 if (match_ip_addr == INADDR_NONE) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 fprintf(stderr, "error: IP address argument is invalid\n");
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 match_udp_port = htons(strtoul(argv[4], 0, 0));
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 outfile = fopen(argv[5], "w");
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 if (!outfile) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 perror(argv[5]);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 for (pkt_idx = 0; ; pkt_idx++) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 pkt = pcap_next(pcap, &pkthdr);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 if (!pkt)
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 break;
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 process_packet(pkt, (unsigned) pkthdr.caplen, pkt_idx);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 if (!stream_init_flag) {
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 fprintf(stderr, "error: specified RTP stream not found\n");
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 exit(1);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 }
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 fclose(outfile);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 exit(0);
05ff0f7ac977 initial commit: split from gsm-codec-lib
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 }