FreeCalypso > hg > sms-coding-utils
annotate gen-pdu/message.c @ 18:590b0b5bcbbb
sms-gen-tpdu: support setting VP for MO
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 27 Aug 2023 07:55:13 +0000 |
parents | d9d722033ff1 |
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1 /* |
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2 * This module implements TPDU encoding of actual messages, after all |
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3 * settings have been captured. |
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4 */ |
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5 |
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6 #include <sys/types.h> |
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7 #include <ctype.h> |
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8 #include <stdio.h> |
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9 #include <stdlib.h> |
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10 #include <string.h> |
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11 #include <strings.h> |
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12 #include "error.h" |
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13 |
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14 extern int dir_mo, include_sca; |
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15 extern u_char sc_addr[12], user_addr[12]; |
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16 extern u_char mr_byte, pid_byte, dcs_byte; |
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17 extern u_char scts_buf[7]; |
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18 extern u_char vp_format, vp_buf[7]; |
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19 extern int is_septet, scts_is_set; |
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20 extern int flag_rp, flag_sr, flag_lp, flag_mms, flag_rd; |
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21 |
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22 extern int input_lineno; |
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23 |
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24 static void |
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25 emit_first_octet(udhi) |
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26 { |
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27 u_char fo; |
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28 |
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29 if (dir_mo) { |
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30 fo = flag_rd ? 5 : 1; |
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31 fo |= vp_format; |
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32 } else { |
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33 fo = flag_mms ? 0 : 4; |
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34 if (flag_lp) |
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35 fo |= 0x08; |
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36 } |
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37 if (flag_sr) |
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38 fo |= 0x20; |
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39 if (udhi) |
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40 fo |= 0x40; |
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41 if (flag_rp) |
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42 fo |= 0x80; |
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43 printf("%02X", fo); |
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44 } |
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45 |
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46 static void |
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47 make_pdu(udl, ud_buf, ud_octets, udhi) |
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48 u_char *ud_buf; |
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49 unsigned udl, ud_octets; |
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50 { |
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51 if (include_sca) |
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52 emit_hex_out(sc_addr, sc_addr[0] + 1, stdout); |
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53 emit_first_octet(udhi); |
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54 if (dir_mo) |
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55 printf("%02X", mr_byte); |
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56 emit_hex_out(user_addr, ((user_addr[0] + 1) >> 1) + 2, stdout); |
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57 printf("%02X", pid_byte); |
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58 printf("%02X", dcs_byte); |
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59 if (!dir_mo) { |
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60 if (!scts_is_set) |
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61 set_auto_scts(); |
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62 emit_hex_out(scts_buf, 7, stdout); |
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63 } else if (vp_format == 0x10) |
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64 printf("%02X", vp_buf[0]); |
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65 else if (vp_format) |
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66 emit_hex_out(vp_buf, 7, stdout); |
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67 printf("%02X", udl); |
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68 emit_hex_out(ud_buf, ud_octets, stdout); |
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69 putchar('\n'); |
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70 } |
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71 |
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72 static void |
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73 cmd_msg_common(arg, udhi) |
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74 char *arg; |
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75 { |
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76 u_char input[160], ud7[160], octbuf[140]; |
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77 unsigned input_len, udhl, udhl1, udh_chars, plain_chars; |
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78 unsigned udl, udl_octets; |
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79 |
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80 for (input_len = 0; ; input_len++) { |
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81 while (isspace(*arg)) |
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82 arg++; |
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83 if (!*arg) |
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84 break; |
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85 if (!isxdigit(arg[0]) || !isxdigit(arg[1])) { |
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86 fprintf(stderr, ERR_PREFIX "invalid hex string\n", |
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87 input_lineno); |
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88 exit(1); |
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89 } |
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90 if (input_len >= 160) { |
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91 toolong: fprintf(stderr, ERR_PREFIX "hex string is too long\n", |
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92 input_lineno); |
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93 exit(1); |
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94 } |
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95 input[input_len] = (decode_hex_digit(arg[0]) << 4) | |
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96 decode_hex_digit(arg[1]); |
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97 arg += 2; |
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98 } |
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99 if (!is_septet && input_len > 140) |
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100 goto toolong; |
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101 if (udhi) { |
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102 if (!input_len) { |
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103 fprintf(stderr, ERR_PREFIX |
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104 "empty message is invalid with UDHI\n", |
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105 input_lineno); |
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106 exit(1); |
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107 } |
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108 udhl = input[0]; |
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109 udhl1 = udhl + 1; |
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110 if (udhl1 > input_len) { |
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111 fprintf(stderr, ERR_PREFIX "UDHL exceeds UD length\n", |
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112 input_lineno); |
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113 exit(1); |
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114 } |
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115 } |
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116 if (!is_septet) { |
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117 make_pdu(input_len, input, input_len, udhi); |
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118 return; |
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119 } |
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120 if (udhi) |
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121 udh_chars = (udhl1 * 8 + 6) / 7; |
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122 else { |
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123 udhl1 = 0; |
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124 udh_chars = 0; |
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125 } |
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126 plain_chars = input_len - udhl1; |
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127 if (check_high_bit(input + udhl1, plain_chars) < 0) { |
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128 fprintf(stderr, ERR_PREFIX "high bit set in GSM7 data\n", |
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129 input_lineno); |
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130 exit(1); |
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131 } |
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132 udl = udh_chars + plain_chars; |
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133 if (udl > 160) { |
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134 fprintf(stderr, ERR_PREFIX |
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135 "message exceeds 160 septets after UDH\n", |
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136 input_lineno); |
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137 exit(1); |
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138 } |
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139 udl_octets = (udl * 7 + 7) / 8; |
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140 bzero(ud7, 160); |
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141 bcopy(input + udhl1, ud7 + udh_chars, plain_chars); |
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142 gsm7_pack(ud7, octbuf, udl_octets); |
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143 if (udhi) |
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144 bcopy(input, octbuf, udhl1); |
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145 make_pdu(udl, octbuf, udl_octets, udhi); |
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146 } |
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147 |
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148 void |
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149 cmd_msg_plain(argc, argv) |
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150 char **argv; |
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151 { |
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152 cmd_msg_common(argv[1], 0); |
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153 } |
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154 |
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155 void |
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156 cmd_msg_udh(argc, argv) |
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157 char **argv; |
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158 { |
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159 cmd_msg_common(argv[1], 1); |
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160 } |