FreeCalypso > hg > freecalypso-tools

annotate tchtools/fc-fr2tch.c @ 921:74d284add54d

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fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +0000
parents 8ddb16a37273
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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5
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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1 /*
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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2 * This utility converts a GSM 06.10 speech recording from the format that is
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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3 * commonly accepted as standard in the Unix/Linux world (libgsm format) into
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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4 * hex strings of TCH bits to be fed to the GSM 05.03 channel encoder by way
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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5 * of a TI Calypso GSM device, a FreeCalypso GSM firmware version with the
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6 * TCH rerouting feature, and fc-shell's tch play command.
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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7 */
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8
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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9 #include <sys/types.h>
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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10 #include <stdio.h>
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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11 #include <stdlib.h>
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12
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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13 main(argc, argv)
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14 char **argv;
7eaa3307e5df fc-fr2tch utility written, added under miscutil
Mychaela Falconia <falcon@freecalypso.org>
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15 {
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Mychaela Falconia <falcon@freecalypso.org>
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16 FILE *inf, *outf;
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Mychaela Falconia <falcon@freecalypso.org>
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17 u_char libgsm_bytes[33], tidsp_bytes[33];
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18 int cc, i, gotsome = 0;
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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19
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20 if (argc != 3) {
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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21 fprintf(stderr, "usage: %s infile outfile\n", argv[0]);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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22 exit(1);
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23 }
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24 inf = fopen(argv[1], "r");
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25 if (!inf) {
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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26 perror(argv[1]);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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27 exit(1);
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28 }
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29 outf = fopen(argv[2], "w");
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30 if (!outf) {
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31 perror(argv[2]);
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32 exit(1);
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33 }
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34 for (;;) {
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35 cc = fread(libgsm_bytes, 1, 33, inf);
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36 if (cc < 33)
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37 break;
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Mychaela Falconia <falcon@freecalypso.org>
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38 if ((libgsm_bytes[0] & 0xF0) != 0xD0) {
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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39 invalid: fprintf(stderr, "error: %s is not in libgsm format\n",
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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40 argv[1]);
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41 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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42 }
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Mychaela Falconia <falcon@freecalypso.org>
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43 gsm0610_libgsm_to_tidsp(libgsm_bytes, tidsp_bytes);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
Mychaela Falconia <falcon@freecalypso.org>
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44 for (i = 0; i < 33; i++)
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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45 fprintf(outf, "%02X", tidsp_bytes[i]);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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46 putc('\n', outf);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
Mychaela Falconia <falcon@freecalypso.org>
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47 gotsome = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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48 }
7eaa3307e5df fc-fr2tch utility written, added under miscutil
Mychaela Falconia <falcon@freecalypso.org>
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49 fclose(outf);
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50 if (cc) {
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51 if (gotsome)
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52 fprintf(stderr,
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53 "warning: extra non-33 bytes at the end of %s\n",
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54 argv[1]);
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55 else
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56 goto invalid;
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57 }
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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58 exit(0);
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59 }