FreeCalypso > hg > gsm-net-reveng

annotate tfo/tfo-trace-msg.c @ 29:fec87477e60b

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new program tfo-trace-msg
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 28 Aug 2024 02:28:37 +0000
parents
children 19039ffbe605
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29
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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2 * This program reads a raw binary file that contains a recording of
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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3 * a T1/E1 timeslot on the MSC side of a TRAU, analyzes it looking for
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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4 * TFO IS messages, and prints whatever it finds.
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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5 */
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Mychaela Falconia <falcon@freecalypso.org>
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6
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Mychaela Falconia <falcon@freecalypso.org>
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7 #include <stdio.h>
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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8 #include <stdint.h>
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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9 #include <stdlib.h>
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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10 #include <string.h>
fec87477e60b new program tfo-trace-msg
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11 #include <strings.h>
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12
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Mychaela Falconia <falcon@freecalypso.org>
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13 static uint8_t is_hunt_buf[320];
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Mychaela Falconia <falcon@freecalypso.org>
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14 static int is_state;
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Mychaela Falconia <falcon@freecalypso.org>
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15 static unsigned is_hunt_fill;
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Mychaela Falconia <falcon@freecalypso.org>
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16 static unsigned is_offset;
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Mychaela Falconia <falcon@freecalypso.org>
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17 static unsigned is_file_offset;
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Mychaela Falconia <falcon@freecalypso.org>
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18 static unsigned is_bit_count;
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Mychaela Falconia <falcon@freecalypso.org>
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19 static unsigned is_rx_word;
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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20
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Mychaela Falconia <falcon@freecalypso.org>
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21 static const u_char hdr_pattern[20] = {0, 1, 0, 1, 0, 1, 1, 0, 1, 0,
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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22 0, 1, 1, 0, 1, 0, 1, 0, 0, 1};
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23
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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24 static void
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Mychaela Falconia <falcon@freecalypso.org>
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25 is_rx_hunt(cur_file_offset)
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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26 unsigned cur_file_offset;
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Mychaela Falconia <falcon@freecalypso.org>
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27 {
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Mychaela Falconia <falcon@freecalypso.org>
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28 unsigned offset, n;
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Mychaela Falconia <falcon@freecalypso.org>
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29
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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30 for (offset = 0; offset < 16; offset++) {
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Mychaela Falconia <falcon@freecalypso.org>
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31 for (n = 0; n < 20; n++)
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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32 if ((is_hunt_buf[offset + n*16] & 1) != hdr_pattern[n])
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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33 break;
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Mychaela Falconia <falcon@freecalypso.org>
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34 if (n == 20)
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Mychaela Falconia <falcon@freecalypso.org>
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35 break;
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Mychaela Falconia <falcon@freecalypso.org>
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36 }
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Mychaela Falconia <falcon@freecalypso.org>
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37 if (n != 20)
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Mychaela Falconia <falcon@freecalypso.org>
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38 return;
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Mychaela Falconia <falcon@freecalypso.org>
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39 is_offset = offset;
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Mychaela Falconia <falcon@freecalypso.org>
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40 is_file_offset = cur_file_offset - 19*16 + offset;
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Mychaela Falconia <falcon@freecalypso.org>
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41 is_state = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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42 is_bit_count = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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43 is_rx_word = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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44 is_hunt_fill = 0;
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45 }
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46
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47 static void
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Mychaela Falconia <falcon@freecalypso.org>
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48 is_process_cmd()
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Mychaela Falconia <falcon@freecalypso.org>
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49 {
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Mychaela Falconia <falcon@freecalypso.org>
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50 int cont;
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51
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Mychaela Falconia <falcon@freecalypso.org>
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52 printf("0x%x: ", is_file_offset);
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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53 switch (is_rx_word) {
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Mychaela Falconia <falcon@freecalypso.org>
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54 case 0x05D:
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Mychaela Falconia <falcon@freecalypso.org>
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55 printf("IS_REQ\n");
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56 cont = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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57 break;
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Mychaela Falconia <falcon@freecalypso.org>
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58 case 0x0BA:
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Mychaela Falconia <falcon@freecalypso.org>
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59 printf("IS_ACK\n");
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60 cont = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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61 break;
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Mychaela Falconia <falcon@freecalypso.org>
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62 case 0x0E7:
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Mychaela Falconia <falcon@freecalypso.org>
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63 printf("IS_IPE\n");
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Mychaela Falconia <falcon@freecalypso.org>
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64 cont = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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65 break;
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Mychaela Falconia <falcon@freecalypso.org>
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66 case 0x129:
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Mychaela Falconia <falcon@freecalypso.org>
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67 printf("IS_FILL\n");
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68 cont = 0;
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69 break;
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Mychaela Falconia <falcon@freecalypso.org>
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70 case 0x174:
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Mychaela Falconia <falcon@freecalypso.org>
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71 printf("IS_DUP\n");
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Mychaela Falconia <falcon@freecalypso.org>
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72 cont = 0;
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73 break;
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Mychaela Falconia <falcon@freecalypso.org>
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74 case 0x193:
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Mychaela Falconia <falcon@freecalypso.org>
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75 printf("IS_SYL\n");
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76 cont = 0;
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77 break;
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Mychaela Falconia <falcon@freecalypso.org>
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78 default:
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Mychaela Falconia <falcon@freecalypso.org>
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79 printf("unknown IS_Command 0x%03X\n", is_rx_word);
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80 cont = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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81 }
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Mychaela Falconia <falcon@freecalypso.org>
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82 if (cont) {
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Mychaela Falconia <falcon@freecalypso.org>
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83 is_state = 2;
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Mychaela Falconia <falcon@freecalypso.org>
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84 is_bit_count = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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85 is_rx_word = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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86 } else
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87 is_state = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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88 }
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Mychaela Falconia <falcon@freecalypso.org>
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89
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90 static void
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Mychaela Falconia <falcon@freecalypso.org>
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91 is_process_ext()
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Mychaela Falconia <falcon@freecalypso.org>
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92 {
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Mychaela Falconia <falcon@freecalypso.org>
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93 printf(" IS_Extension: 0x%05X", is_rx_word);
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Mychaela Falconia <falcon@freecalypso.org>
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94 if (is_rx_word & 0x80200) {
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Mychaela Falconia <falcon@freecalypso.org>
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95 printf(" (bad sync)\n");
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Mychaela Falconia <falcon@freecalypso.org>
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96 is_state = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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97 return;
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Mychaela Falconia <falcon@freecalypso.org>
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98 }
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Mychaela Falconia <falcon@freecalypso.org>
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99 switch (is_rx_word & 3) {
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100 case 0:
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Mychaela Falconia <falcon@freecalypso.org>
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101 printf(" (final)\n");
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Mychaela Falconia <falcon@freecalypso.org>
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102 is_state = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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103 return;
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Mychaela Falconia <falcon@freecalypso.org>
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104 case 3:
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Mychaela Falconia <falcon@freecalypso.org>
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105 printf(" (continue)\n");
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Mychaela Falconia <falcon@freecalypso.org>
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106 is_state = 2;
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Mychaela Falconia <falcon@freecalypso.org>
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107 is_bit_count = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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108 is_rx_word = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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109 return;
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Mychaela Falconia <falcon@freecalypso.org>
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110 default:
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Mychaela Falconia <falcon@freecalypso.org>
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111 printf(" (bad EX)\n");
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Mychaela Falconia <falcon@freecalypso.org>
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112 is_state = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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113 }
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Mychaela Falconia <falcon@freecalypso.org>
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114 }
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Mychaela Falconia <falcon@freecalypso.org>
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115
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Mychaela Falconia <falcon@freecalypso.org>
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116 static void
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Mychaela Falconia <falcon@freecalypso.org>
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117 is_rx_process(input, cur_file_offset)
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118 uint8_t *input;
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119 unsigned cur_file_offset;
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120 {
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Mychaela Falconia <falcon@freecalypso.org>
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121 unsigned new_bit;
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Mychaela Falconia <falcon@freecalypso.org>
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122
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Mychaela Falconia <falcon@freecalypso.org>
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123 memmove(is_hunt_buf, is_hunt_buf + 16, 304);
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124 memcpy(is_hunt_buf + 304, input, 16);
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Mychaela Falconia <falcon@freecalypso.org>
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125 if (!is_state) {
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Mychaela Falconia <falcon@freecalypso.org>
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126 if (is_hunt_fill < 20)
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Mychaela Falconia <falcon@freecalypso.org>
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127 is_hunt_fill++;
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Mychaela Falconia <falcon@freecalypso.org>
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128 if (is_hunt_fill == 20)
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Mychaela Falconia <falcon@freecalypso.org>
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129 is_rx_hunt(cur_file_offset);
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Mychaela Falconia <falcon@freecalypso.org>
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130 return;
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Mychaela Falconia <falcon@freecalypso.org>
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131 }
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Mychaela Falconia <falcon@freecalypso.org>
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132 new_bit = input[is_offset] & 1;
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Mychaela Falconia <falcon@freecalypso.org>
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133 is_rx_word <<= 1;
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Mychaela Falconia <falcon@freecalypso.org>
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134 is_rx_word |= new_bit;
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Mychaela Falconia <falcon@freecalypso.org>
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135 is_bit_count++;
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Mychaela Falconia <falcon@freecalypso.org>
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136 if (is_state == 1 && is_bit_count == 10)
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Mychaela Falconia <falcon@freecalypso.org>
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137 is_process_cmd();
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Mychaela Falconia <falcon@freecalypso.org>
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138 else if (is_state == 2 && is_bit_count == 20)
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Mychaela Falconia <falcon@freecalypso.org>
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139 is_process_ext();
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Mychaela Falconia <falcon@freecalypso.org>
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140 }
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Mychaela Falconia <falcon@freecalypso.org>
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141
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Mychaela Falconia <falcon@freecalypso.org>
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142 main(argc, argv)
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Mychaela Falconia <falcon@freecalypso.org>
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143 char **argv;
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Mychaela Falconia <falcon@freecalypso.org>
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144 {
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Mychaela Falconia <falcon@freecalypso.org>
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145 FILE *inf;
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Mychaela Falconia <falcon@freecalypso.org>
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146 uint8_t chunk[16];
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Mychaela Falconia <falcon@freecalypso.org>
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147 unsigned file_offset;
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148 int cc;
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149
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150 if (argc != 2) {
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151 fprintf(stderr, "usage: %s pcm-capture-file\n", argv[0]);
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152 exit(1);
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153 }
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154 inf = fopen(argv[1], "r");
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Mychaela Falconia <falcon@freecalypso.org>
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155 if (!inf) {
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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156 perror(argv[1]);
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157 exit(1);
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158 }
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159 for (file_offset = 0; ; file_offset += 16) {
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160 cc = fread(chunk, 1, 16, inf);
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161 if (cc == 0)
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Mychaela Falconia <falcon@freecalypso.org>
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162 break;
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Mychaela Falconia <falcon@freecalypso.org>
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163 if (cc != 16) {
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Mychaela Falconia <falcon@freecalypso.org>
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164 fprintf(stderr,
fec87477e60b new program tfo-trace-msg
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165 "error: read of 16 bytes returned %d\n", cc);
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166 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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167 }
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Mychaela Falconia <falcon@freecalypso.org>
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168 is_rx_process(chunk, file_offset);
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Mychaela Falconia <falcon@freecalypso.org>
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169 }
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Mychaela Falconia <falcon@freecalypso.org>
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170 exit(0);
fec87477e60b new program tfo-trace-msg
Mychaela Falconia <falcon@freecalypso.org>
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171 }