FreeCalypso > hg > rtp-debug-utils

annotate pcap-study/rtp-tfo-trace.c @ 15:96b37cef5020

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rtp-gsmfr-dump: convert from old libgsm to libgsmfr2
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 19 Sep 2024 01:59:14 +0000
parents e686bc92c7d8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1
41eba040785a rtp-tfo-trace program written, compiles
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1 /*
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2 * This program reads a pcap file containing RTP packets of a PSTN call
41eba040785a rtp-tfo-trace program written, compiles
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3 * (PCMU or PCMA, 160 samples per RTP packet), flowing in one or both
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4 * directions, and looks for TFO IS messages.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <sys/socket.h>
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9 #include <netinet/in.h>
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10 #include <arpa/inet.h>
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11 #include <stdio.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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14 #include <strings.h>
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15 #include <pcap/pcap.h>
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16
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17 static pcap_t *pcap;
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18 static in_addr_t match_ip_addr;
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19 static u_short match_udp_port;
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20 static unsigned link_hdr_len, ethertype_offset;
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21
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22 static struct onedir {
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23 int init_flag;
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24 unsigned last_seq;
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25 unsigned last_tstamp;
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26 unsigned stream_ssrc;
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27 u_char is_hunt_buf[320];
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28 int is_state;
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29 unsigned is_hunt_fill;
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30 unsigned is_offset;
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31 unsigned is_alignment;
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32 unsigned is_bit_count;
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33 unsigned is_rx_word;
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34 } rx_state, tx_state;
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35
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36 static const u_char hdr_pattern[20] = {0, 1, 0, 1, 0, 1, 1, 0, 1, 0,
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37 0, 1, 1, 0, 1, 0, 1, 0, 0, 1};
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38
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39 static void
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40 check_dl_type()
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41 {
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42 int dltype;
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43
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44 dltype = pcap_datalink(pcap);
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45 switch (dltype) {
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46 case DLT_EN10MB:
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47 link_hdr_len = 14;
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48 ethertype_offset = 12;
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49 break;
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50 case DLT_RAW:
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51 link_hdr_len = 0;
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52 break;
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53 case DLT_LINUX_SLL:
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54 link_hdr_len = 16;
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55 ethertype_offset = 14;
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56 break;
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57 default:
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58 fprintf(stderr, "error: unsupported data link type %d\n",
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59 dltype);
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60 exit(1);
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61 }
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62 }
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63
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64 static void
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65 rtp_stream_logic(rtp_hdr, pkt_idx, st, dir_str)
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66 u_char *rtp_hdr;
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67 unsigned pkt_idx;
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68 struct onedir *st;
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69 char *dir_str;
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70 {
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71 unsigned cur_seq, cur_tstamp, cur_ssrc;
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72
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73 cur_seq = (rtp_hdr[2] << 8) | rtp_hdr[3];
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74 cur_tstamp = (rtp_hdr[4] << 24) | (rtp_hdr[5] << 16) |
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75 (rtp_hdr[6] << 8) | rtp_hdr[7];
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76 cur_ssrc = (rtp_hdr[8] << 24) | (rtp_hdr[9] << 16) |
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77 (rtp_hdr[10] << 8) | rtp_hdr[11];
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78 if (st->init_flag) {
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79 if (cur_ssrc != st->stream_ssrc) {
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80 printf(
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81 "error in %s packet #%u: SSRC change from 0x%08X to 0x%08X\n",
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82 dir_str, pkt_idx, st->stream_ssrc, cur_ssrc);
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83 } else if (cur_seq != st->last_seq + 1 &&
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84 (cur_seq != 0 || st->last_seq != 0xFFFF)) {
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85 printf(
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86 "error in %s packet #%u: seq break from 0x%04X to 0x%04X\n",
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87 dir_str, pkt_idx, st->last_seq, cur_seq);
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88 } else if (cur_tstamp != st->last_tstamp + 160) {
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89 printf(
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90 "error in %s packet #%u: timestamp break from 0x%08X to 0x%08X\n",
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91 dir_str, pkt_idx, st->last_tstamp, cur_tstamp);
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92 }
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93 } else
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94 st->init_flag = 1;
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95 st->last_seq = cur_seq;
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96 st->last_tstamp = cur_tstamp;
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97 st->stream_ssrc = cur_ssrc;
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98 }
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99
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100 static void
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101 is_rx_hunt(input_pos, pkt_idx, st, dir_str)
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102 unsigned input_pos;
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103 unsigned pkt_idx;
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104 struct onedir *st;
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105 char *dir_str;
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106 {
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107 unsigned offset, n;
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108
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109 for (offset = 0; offset < 16; offset++) {
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110 for (n = 0; n < 20; n++)
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111 if ((st->is_hunt_buf[offset + n*16] & 1) !=
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112 hdr_pattern[n])
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113 break;
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114 if (n == 20)
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115 break;
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116 }
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117 if (n != 20)
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118 return;
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119 st->is_offset = offset;
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120 st->is_alignment = input_pos * 16 + offset;
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121 st->is_state = 1;
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122 st->is_bit_count = 0;
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123 st->is_rx_word = 0;
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124 st->is_hunt_fill = 0;
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125 }
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126
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127 static void
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128 is_process_cmd(pkt_idx, st, dir_str)
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129 unsigned pkt_idx;
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130 struct onedir *st;
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131 char *dir_str;
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132 {
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133 int cont;
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134
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135 printf("#%u: %s (align %u) ", pkt_idx, dir_str, st->is_alignment);
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136 switch (st->is_rx_word) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 case 0x05D:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 printf("IS_REQ\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 cont = 1;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 break;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 case 0x0BA:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 printf("IS_ACK\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 cont = 1;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 break;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 case 0x0E7:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 printf("IS_IPE\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 cont = 1;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 break;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 case 0x129:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 printf("IS_FILL\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 cont = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 break;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 case 0x174:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 printf("IS_DUP\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 cont = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 break;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 case 0x193:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 printf("IS_SYL\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 cont = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 break;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 default:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 printf("Unknown IS_Command 0x%03X\n", st->is_rx_word);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 cont = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 if (cont) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 st->is_state = 2;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 st->is_bit_count = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 st->is_rx_word = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 } else
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 st->is_state = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 static void
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 is_process_ext(pkt_idx, st, dir_str)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 unsigned pkt_idx;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 struct onedir *st;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 char *dir_str;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 printf("#%u: %s IS_Extension: 0x%05X", pkt_idx, dir_str,
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 st->is_rx_word);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 if (st->is_rx_word & 0x80200) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 printf(" (bad sync)\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 st->is_state = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 switch (st->is_rx_word & 3) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 case 0:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 printf(" (final)\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 st->is_state = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 case 3:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 printf(" (continue)\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 st->is_state = 2;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 st->is_bit_count = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 st->is_rx_word = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 default:
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 printf(" (bad EX)\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 st->is_state = 0;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 static void
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 is_rx_process(input, input_pos, pkt_idx, st, dir_str)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 uint8_t *input;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 unsigned input_pos;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 unsigned pkt_idx;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 struct onedir *st;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 char *dir_str;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 unsigned new_bit;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 memmove(st->is_hunt_buf, st->is_hunt_buf + 16, 304);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 memcpy(st->is_hunt_buf + 304, input, 16);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 if (!st->is_state) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 if (st->is_hunt_fill < 20)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 st->is_hunt_fill++;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 if (st->is_hunt_fill == 20)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 is_rx_hunt(input_pos, pkt_idx, st, dir_str);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 new_bit = input[st->is_offset] & 1;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 st->is_rx_word <<= 1;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 st->is_rx_word |= new_bit;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 st->is_bit_count++;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 if (st->is_state == 1 && st->is_bit_count == 10)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 is_process_cmd(pkt_idx, st, dir_str);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 else if (st->is_state == 2 && st->is_bit_count == 20)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 is_process_ext(pkt_idx, st, dir_str);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 static void
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 process_packet_onedir(pkt, caplen, pkt_idx, st, dir_str)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 u_char *pkt;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 unsigned caplen, pkt_idx;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 struct onedir *st;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 char *dir_str;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 unsigned udplen, payload_len;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 unsigned is_chunk;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 udplen = (pkt[24] << 8) | pkt[25];
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 if (caplen < udplen + 20) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 printf("error: %s packet #%u is truncated in the capture\n",
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 dir_str, pkt_idx);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 if (udplen < 20) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 printf(
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 "error in %s packet #%u: UDP length is too short for RTP header\n",
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 dir_str, pkt_idx);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 if (pkt[28] != 0x80) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 printf(
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 "error in %s packet #%u: unsupported RTP header structure\n",
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 dir_str, pkt_idx);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 rtp_stream_logic(pkt + 28, pkt_idx, st, dir_str);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 payload_len = udplen - 20;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 if (payload_len != 160) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 printf("error in %s packet #%u: wrong payload length\n",
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 dir_str, pkt_idx);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 for (is_chunk = 0; is_chunk < 10; is_chunk++)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 is_rx_process(pkt + 40 + is_chunk * 16, is_chunk, pkt_idx, st,
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 dir_str);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 static void
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 process_packet(pkt, caplen, pkt_idx)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 u_char *pkt;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 unsigned caplen, pkt_idx;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 if (caplen < link_hdr_len + 28)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 if (link_hdr_len) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 if (pkt[ethertype_offset] != 0x08)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 if (pkt[ethertype_offset+1] != 0x00)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 pkt += link_hdr_len;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 caplen -= link_hdr_len;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 /* check IP header */
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 if (pkt[0] != 0x45)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 if (pkt[9] != 17) /* UDP */
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 return;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 if (!bcmp(pkt + 12, &match_ip_addr, 4) &&
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 !bcmp(pkt + 20, &match_udp_port, 2))
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 process_packet_onedir(pkt, caplen, pkt_idx, &tx_state, "-->");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 else if (!bcmp(pkt + 16, &match_ip_addr, 4) &&
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 !bcmp(pkt + 22, &match_udp_port, 2))
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 process_packet_onedir(pkt, caplen, pkt_idx, &rx_state, "<--");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300 main(argc, argv)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301 char **argv;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 char errbuf[PCAP_ERRBUF_SIZE];
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 u_char *pkt;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 struct pcap_pkthdr pkthdr;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306 unsigned pkt_idx;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 if (argc != 4) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 fprintf(stderr, "usage: %s pcap-file ip-addr udp-port\n",
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 argv[0]);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311 exit(1);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 pcap = pcap_open_offline(argv[1], errbuf);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314 if (!pcap) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 fprintf(stderr, "%s: %s\n", argv[1], errbuf);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 exit(1);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 check_dl_type();
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 match_ip_addr = inet_addr(argv[2]);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 if (match_ip_addr == INADDR_NONE) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 fprintf(stderr, "error: IP address argument is invalid\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 exit(1);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 match_udp_port = htons(strtoul(argv[3], 0, 0));
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 for (pkt_idx = 0; ; pkt_idx++) {
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 pkt = pcap_next(pcap, &pkthdr);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 if (!pkt)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 break;
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 process_packet(pkt, (unsigned) pkthdr.caplen, pkt_idx);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 }
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 if (!tx_state.init_flag)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 printf(
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 "Warning: found no packets with src matching specified IP:port\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 if (!rx_state.init_flag)
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 printf(
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 "Warning: found no packets with dest matching specified IP:port\n");
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 exit(0);
41eba040785a rtp-tfo-trace program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 }