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comparison frtest/dlcap-parse.c @ 167:80c93ef82a51

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gsmfr-dlcap-parse utility written
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 16 Dec 2022 08:38:36 +0000
parents efrtest/dlcap-parse.c@b98aebd94d1f
children 5fe0b3eb35c1
comparison
equal deleted inserted replaced
166:500f3e93964f 167:80c93ef82a51
1 /*
2 * This program reads a TCH/FS downlink capture produced with FreeCalypso tools
3 * (fw version with TCH downlink sniffing feature and fc-shell tch record),
4 * parses the frame bits according to our current understanding, and dumps
5 * everything in human-readable form for further analysis.
6 */
7
8 #include <ctype.h>
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <strings.h>
14 #include <gsm.h>
15 #include "../libgsmfrp/gsm_fr_preproc.h"
16
17 static void
18 process_record(lineno, fn_mod_104, status_words, tidsp_bytes, dummy_state)
19 int lineno;
20 unsigned fn_mod_104;
21 uint16_t *status_words;
22 uint8_t *tidsp_bytes;
23 gsm dummy_state;
24 {
25 uint8_t libgsm_bytes[33];
26 int16_t params[76];
27 int i, j, n;
28
29 printf("#%d: fn=%u DSP %04X %04X %04X\n", lineno, fn_mod_104,
30 status_words[0], status_words[1], status_words[2]);
31 gsm0610_tidsp_to_libgsm(tidsp_bytes, libgsm_bytes);
32 fputs(" bits ", stdout);
33 for (i = 0; i < 33; i++)
34 printf("%02X", tidsp_bytes[i]);
35 printf(" SID=%d\n", gsmfr_preproc_sid_classify(libgsm_bytes));
36 gsm_explode(dummy_state, libgsm_bytes, params);
37 fputs(" FR", stdout);
38 n = 0;
39 for (i = 0; i < 8; i++)
40 printf(" %d", params[n++]);
41 putchar('\n');
42 for (i = 0; i < 4; i++) {
43 putchar(' ');
44 for (j = 0; j < 17; j++)
45 printf(" %d", params[n++]);
46 putchar('\n');
47 }
48 }
49
50 main(argc, argv)
51 char **argv;
52 {
53 FILE *inf;
54 gsm dummy_state;
55 char linebuf[128];
56 int lineno, rc;
57 uint16_t status_words[3];
58 uint8_t tidsp_bytes[33];
59 unsigned fn_mod_104;
60
61 if (argc != 2) {
62 fprintf(stderr, "usage: %s dlcap-file\n", argv[0]);
63 exit(1);
64 }
65 inf = fopen(argv[1], "r");
66 if (!inf) {
67 perror(argv[1]);
68 exit(1);
69 }
70 dummy_state = gsm_create();
71 if (!dummy_state) {
72 fprintf(stderr, "gsm_create() failed!\n");
73 exit(1);
74 }
75 for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++) {
76 /* support both old and new formats */
77 if (isxdigit(linebuf[0]) && isxdigit(linebuf[1]) &&
78 isxdigit(linebuf[2]) && isxdigit(linebuf[3])) {
79 rc = parse_dlcap_common(linebuf, status_words,
80 tidsp_bytes);
81 if (rc < 0) {
82 invalid: fprintf(stderr,
83 "error: %s is not in the expected format\n",
84 argv[1]);
85 exit(1);
86 }
87 fn_mod_104 = 0; /* won't have TAF */
88 } else if (!strncmp(linebuf, "FR ", 3)) {
89 rc = parse_dlcap_common(linebuf + 3, status_words,
90 tidsp_bytes);
91 if (rc < 0)
92 goto invalid;
93 if (linebuf[84] != ' ')
94 goto invalid;
95 if (!isdigit(linebuf[85]))
96 goto invalid;
97 fn_mod_104 = strtoul(linebuf + 85, 0, 10);
98 } else
99 goto invalid;
100 process_record(lineno, fn_mod_104, status_words, tidsp_bytes,
101 dummy_state);
102 }
103 exit(0);
104 }