FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/number_encode.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 7154a231e4b5
children
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7154a231e4b5 uptools/libcoding: SMS dest address parsing and encoding implemented
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1 /*
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2 * This library module implements the function that parses SMS destination
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3 * addresses given by the user and encodes them into the GSM 03.40
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4 * TP-Destination-Address structure.
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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 <ctype.h>
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9 #include <stdlib.h>
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10
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11 digit_char_to_gsm(ch)
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12 {
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13 switch (ch) {
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14 case '0':
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15 case '1':
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16 case '2':
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17 case '3':
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18 case '4':
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19 case '5':
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20 case '6':
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21 case '7':
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22 case '8':
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23 case '9':
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24 return (ch - '0');
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25 case '*':
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26 return 0xA;
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27 case '#':
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28 return 0xB;
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29 case 'a':
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30 case 'b':
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31 case 'c':
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32 return (ch - 'a' + 0xC);
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33 case 'A':
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34 case 'B':
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35 case 'C':
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36 return (ch - 'A' + 0xC);
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37 }
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38 return (-1);
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39 }
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40
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41 parse_and_encode_dest_addr(input, outbuf)
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42 char *input;
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43 u_char *outbuf;
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44 {
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45 char *cp, *endp;
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46 int d;
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47 u_char digits[20];
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48 unsigned n;
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49
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50 cp = input;
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51 if (*cp == '+') {
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52 outbuf[1] = 0x91;
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53 cp++;
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54 } else
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55 outbuf[1] = 0x81;
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56 if (digit_char_to_gsm(*cp) < 0)
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57 return(-1);
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58 n = 0;
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59 while ((d = digit_char_to_gsm(*cp)) >= 0) {
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60 cp++;
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61 if (n >= 20)
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62 return(-1);
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63 digits[n++] = d;
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64 }
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65 outbuf[0] = n;
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66 while (n < 20)
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67 digits[n++] = 0xF;
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68 if (*cp == ',') {
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69 cp++;
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70 if (!isdigit(*cp))
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71 return(-1);
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72 outbuf[1] = strtoul(cp, &endp, 0);
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73 if (*endp)
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74 return(-1);
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75 } else if (*cp)
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76 return(-1);
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77 for (n = 0; n < 10; n++)
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78 outbuf[2+n] = (digits[n*2+1] << 4) | digits[n*2];
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79 return(0);
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80 }