FreeCalypso > hg > sms-coding-utils
annotate enc-text/gsm7.c @ 27:7418ca2e9949
libcoding: add functions from freecalypso-tools/uptools/libcoding
that are needed for sms-pdu-decode & pcm-sms-decode
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 13 Jun 2024 02:29:29 +0000 |
parents | e56bb9f09ff1 |
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1 /* |
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2 * In this module we implement SMS encoding in GSM7. |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <stdio.h> |
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7 #include <stdlib.h> |
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8 #include <string.h> |
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9 #include <strings.h> |
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10 #include <unistd.h> |
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11 #include "defs.h" |
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12 |
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13 extern int utf8_input, allow_escape; |
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14 extern int concat_enable, concat_refno_set; |
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15 extern char msgtext[MAX_MSG_CHARS*2+2]; |
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16 extern u_char concat_refno; |
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17 |
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18 gsm7_mode_main() |
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19 { |
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20 u_char msgtext_gsm7[MAX_MSG_CHARS]; |
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21 unsigned msgtext_gsmlen; |
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22 int rc; |
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23 unsigned nparts, n; |
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24 u_char udh[6]; |
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25 unsigned pos, remain, chunk; |
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26 |
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27 if (utf8_input && utf8_to_latin1(msgtext) < 0) { |
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28 fprintf(stderr, "error: invalid UTF-8 message\n"); |
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29 exit(1); |
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30 } |
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31 rc = latin1_to_gsm7(msgtext, msgtext_gsm7, MAX_MSG_CHARS, |
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32 &msgtext_gsmlen, allow_escape); |
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33 if (rc == -1) { |
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34 fprintf(stderr, "error: message not valid for GSM7 charset\n"); |
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35 exit(1); |
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36 } |
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37 if (rc == -2) { |
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38 fprintf(stderr, "error: message too long for max concat SMS\n"); |
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39 exit(1); |
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40 } |
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41 if (rc == -3) { |
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42 fprintf(stderr, |
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43 "error: message contains invalid backslash escape\n"); |
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44 exit(1); |
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45 } |
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46 if (msgtext_gsmlen <= 160) { |
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47 fputs("dcs 0 septet\nmsg ", stdout); |
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48 if (msgtext_gsmlen) |
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49 emit_hex_out(msgtext_gsm7, msgtext_gsmlen, stdout); |
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50 else { |
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51 putchar('"'); |
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52 putchar('"'); |
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53 } |
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54 putchar('\n'); |
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55 exit(0); |
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56 } |
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57 if (!concat_enable) { |
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58 fprintf(stderr, "error: message exceeds 160 chars\n"); |
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59 exit(1); |
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60 } |
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61 if (!concat_refno_set) |
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62 concat_refno = get_concsms_refno_from_host_fs(); |
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63 puts("dcs 0 septet"); |
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64 nparts = (msgtext_gsmlen + 152) / 153; |
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65 udh[0] = 5; |
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66 udh[1] = 0x00; |
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67 udh[2] = 0x03; |
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68 udh[3] = concat_refno; |
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69 udh[4] = nparts; |
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70 pos = 0; |
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71 remain = msgtext_gsmlen; |
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72 for (n = 1; n <= nparts; n++) { |
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73 udh[5] = n; |
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74 chunk = 153; |
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75 if (chunk > remain) |
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76 chunk = remain; |
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77 fputs("msg-udh ", stdout); |
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78 emit_hex_out(udh, 6, stdout); |
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79 emit_hex_out(msgtext_gsm7 + pos, chunk, stdout); |
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80 putchar('\n'); |
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81 pos += chunk; |
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82 remain -= chunk; |
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83 } |
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84 exit(0); |
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85 } |