FreeCalypso > hg > themwi-system-sw
annotate mgw/readconf.c @ 101:ca21fbf9d2ea
mgw: implement G.711 encoding
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Mon, 26 Sep 2022 15:21:05 -0800 |
parents | f280328e7e2e |
children | f062c32a5116 |
rev | line source |
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32
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1 /* |
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2 * In this module we implement the reading of /var/gsm/themwi-mgw.cfg: |
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3 * we parse and save the configured IP address and port range for each |
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4 * of our two sides, GSM and PSTN. |
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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 <sys/socket.h> |
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9 #include <netinet/in.h> |
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10 #include <arpa/inet.h> |
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11 #include <ctype.h> |
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12 #include <stdio.h> |
95
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32
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13 #include <stdint.h> |
32
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14 #include <stdlib.h> |
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15 #include <string.h> |
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16 #include <strings.h> |
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17 #include "struct.h" |
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18 |
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19 struct bind_range_cfg bind_range_gsm, bind_range_pstn; |
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20 |
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21 static char config_file_pathname[] = "/var/gsm/themwi-mgw.cfg"; |
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22 |
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23 struct parse_state { |
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24 int lineno; |
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25 int set_mask; |
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26 }; |
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27 |
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28 static void |
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29 handle_bind_ip(st, kw, brc, line) |
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30 struct parse_state *st; |
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31 char *kw, *line; |
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32 struct bind_range_cfg *brc; |
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33 { |
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34 char *cp, *np; |
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35 |
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36 for (cp = line; isspace(*cp); cp++) |
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37 ; |
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38 if (*cp == '\0' || *cp == '#') { |
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39 inv_syntax: fprintf(stderr, |
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40 "%s line %d: %s setting requires one argument\n", |
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41 config_file_pathname, st->lineno, kw); |
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42 exit(1); |
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43 } |
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44 for (np = cp; *cp && !isspace(*cp); cp++) |
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45 ; |
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46 if (*cp) |
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47 *cp++ = '\0'; |
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48 while (isspace(*cp)) |
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49 cp++; |
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50 if (*cp != '\0' && *cp != '#') |
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51 goto inv_syntax; |
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52 brc->bind_ip.s_addr = inet_addr(np); |
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53 if (brc->bind_ip.s_addr == INADDR_NONE) { |
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54 fprintf(stderr, |
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55 "%s line %d: invalid IP address argument \"%s\"\n", |
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56 config_file_pathname, st->lineno, np); |
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57 exit(1); |
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58 } |
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59 } |
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60 |
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61 static void |
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62 handle_port_range(st, kw, brc, line) |
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63 struct parse_state *st; |
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64 char *kw, *line; |
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65 struct bind_range_cfg *brc; |
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66 { |
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67 char *cp, *np1, *np2; |
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68 |
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69 for (cp = line; isspace(*cp); cp++) |
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70 ; |
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71 if (!isdigit(*cp)) { |
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72 inv_syntax: fprintf(stderr, |
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73 "%s line %d: %s setting requires two numeric arguments\n", |
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74 config_file_pathname, st->lineno, kw); |
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75 exit(1); |
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76 } |
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77 for (np1 = cp; isdigit(*cp); cp++) |
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78 ; |
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79 if (!isspace(*cp)) |
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80 goto inv_syntax; |
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81 while (isspace(*cp)) |
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82 cp++; |
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83 if (!isdigit(*cp)) |
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84 goto inv_syntax; |
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85 for (np2 = cp; isdigit(*cp); cp++) |
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86 ; |
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87 if (*cp && !isspace(*cp)) |
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88 goto inv_syntax; |
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89 while (isspace(*cp)) |
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90 cp++; |
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91 if (*cp != '\0' && *cp != '#') |
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92 goto inv_syntax; |
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93 brc->port_range_start = atoi(np1); |
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94 brc->port_range_end = atoi(np2); |
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95 if (brc->port_range_start & 1) { |
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96 fprintf(stderr, "%s line %d: start port must be even\n", |
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97 config_file_pathname, st->lineno); |
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98 exit(1); |
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99 } |
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100 if (!(brc->port_range_end & 1)) { |
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101 fprintf(stderr, "%s line %d: end port must be odd\n", |
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102 config_file_pathname, st->lineno); |
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103 exit(1); |
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104 } |
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105 if (brc->port_range_end <= brc->port_range_start) { |
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106 fprintf(stderr, |
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107 "%s line %d: end port must be greater than start port\n", |
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108 config_file_pathname, st->lineno); |
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109 exit(1); |
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110 } |
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111 brc->port_next = brc->port_range_start; |
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112 brc->port_tries = (brc->port_range_end - brc->port_range_start + 1) / 2; |
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113 } |
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114 |
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115 static void |
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116 process_line(st, line) |
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117 struct parse_state *st; |
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118 char *line; |
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119 { |
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120 char *cp, *np; |
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121 void (*handler)(); |
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122 struct bind_range_cfg *ipside; |
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123 int set_id; |
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124 |
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125 if (!index(line, '\n')) { |
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126 fprintf(stderr, "%s line %d: too long or missing newline\n", |
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127 config_file_pathname, st->lineno); |
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128 exit(1); |
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129 } |
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130 for (cp = line; isspace(*cp); cp++) |
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131 ; |
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132 if (*cp == '\0' || *cp == '#') |
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133 return; |
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134 for (np = cp; *cp && !isspace(*cp); cp++) |
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135 ; |
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136 if (*cp) |
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137 *cp++ = '\0'; |
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138 if (!strcmp(np, "gsm-ip-addr")) { |
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139 handler = handle_bind_ip; |
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140 ipside = &bind_range_gsm; |
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141 set_id = 1; |
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142 } else if (!strcmp(np, "gsm-port-range")) { |
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143 handler = handle_port_range; |
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144 ipside = &bind_range_gsm; |
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145 set_id = 2; |
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146 } else if (!strcmp(np, "pstn-ip-addr")) { |
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147 handler = handle_bind_ip; |
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148 ipside = &bind_range_pstn; |
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149 set_id = 4; |
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150 } else if (!strcmp(np, "pstn-port-range")) { |
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151 handler = handle_port_range; |
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152 ipside = &bind_range_pstn; |
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153 set_id = 8; |
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154 } else { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
155 fprintf(stderr, "%s line %d: non-understood keyword \"%s\"\n", |
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parents:
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|
156 config_file_pathname, st->lineno, np); |
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|
157 exit(1); |
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parents:
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|
158 } |
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parents:
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|
159 if (st->set_mask & set_id) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
160 fprintf(stderr, "%s line %d: duplicate %s setting\n", |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
161 config_file_pathname, st->lineno, np); |
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parents:
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|
162 exit(1); |
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parents:
diff
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|
163 } |
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parents:
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|
164 handler(st, np, ipside, cp); |
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parents:
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|
165 st->set_mask |= set_id; |
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parents:
diff
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|
166 } |
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parents:
diff
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|
167 |
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parents:
diff
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|
168 read_config_file() |
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parents:
diff
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|
169 { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
170 FILE *inf; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
171 struct parse_state pst; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
172 char linebuf[256]; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
173 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
174 inf = fopen(config_file_pathname, "r"); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
175 if (!inf) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
176 perror(config_file_pathname); |
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parents:
diff
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|
177 exit(1); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
178 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
179 pst.set_mask = 0; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
180 for (pst.lineno = 1; fgets(linebuf, sizeof linebuf, inf); pst.lineno++) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
181 process_line(&pst, linebuf); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
182 fclose(inf); |
b3f74df7b808
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
183 if (pst.set_mask != 15) { |
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beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
184 fprintf(stderr, "error: %s did not set all required settings\n", |
b3f74df7b808
beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
185 config_file_pathname); |
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beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
186 exit(1); |
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beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
187 } |
b3f74df7b808
beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
188 } |