FreeCalypso > hg > themwi-system-sw

annotate sip-in/readconf.c @ 68:709b78a4ebf0

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sip-in: implement retransmission of INVITE responses
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 18 Sep 2022 21:56:20 -0800
parents 62f39c7cee15
children e64d4d44025d
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1 /*
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2 * In this module we implement the reading of /var/gsm/themwi-sip-in.cfg:
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3 * the main settings are bind-ip and bind-port, but we also have some
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4 * optional config settings.
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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>
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13 #include <stdlib.h>
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14 #include <string.h>
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15 #include <strings.h>
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16
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17 struct in_addr sip_bind_ip;
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18 unsigned sip_bind_port;
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19 int cfg_use_100rel;
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20 unsigned cfg_retrans_timeout = 500;
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21 unsigned cfg_retrans_count = 10;
47
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22
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23 static char config_file_pathname[] = "/var/gsm/themwi-sip-in.cfg";
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24
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25 struct parse_state {
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26 int lineno;
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27 int set_mask;
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28 };
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29
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30 static void
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31 handle_ip(st, kw, var, arg)
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32 struct parse_state *st;
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33 char *kw, *arg;
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34 struct in_addr *var;
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35 {
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36 var->s_addr = inet_addr(arg);
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37 if (var->s_addr == INADDR_NONE) {
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38 fprintf(stderr,
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39 "%s line %d: invalid IP address argument \"%s\"\n",
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40 config_file_pathname, st->lineno, arg);
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41 exit(1);
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42 }
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43 }
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44
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45 static void
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46 handle_num(st, kw, var, arg)
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47 struct parse_state *st;
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48 char *kw, *arg;
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49 unsigned *var;
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50 {
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51 char *endp;
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52
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53 *var = strtoul(arg, &endp, 10);
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54 if (*endp) {
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55 fprintf(stderr, "%s line %d: invalid numeric argument \"%s\"\n",
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56 config_file_pathname, st->lineno, arg);
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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_bool(st, kw, var, arg)
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63 struct parse_state *st;
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64 char *kw, *arg;
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65 int *var;
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66 {
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67 if (!strcmp(arg, "true") || !strcmp(arg, "on") || !strcmp(arg, "yes")
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68 || !strcmp(arg, "1")) {
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69 *var = 1;
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70 return;
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71 }
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72 if (!strcmp(arg, "false") || !strcmp(arg, "off") || !strcmp(arg, "no")
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73 || !strcmp(arg, "0")) {
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74 *var = 0;
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75 return;
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76 }
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77 fprintf(stderr, "%s line %d: invalid boolean argument \"%s\"\n",
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78 config_file_pathname, st->lineno, arg);
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79 exit(1);
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80 }
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81
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82 static void
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83 process_line(st, line)
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84 struct parse_state *st;
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85 char *line;
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86 {
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87 char *cp, *np, *arg;
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88 void (*handler)(), *var;
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89 int set_id;
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90
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91 if (!index(line, '\n')) {
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92 fprintf(stderr, "%s line %d: too long or missing newline\n",
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93 config_file_pathname, st->lineno);
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94 exit(1);
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95 }
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96 for (cp = line; isspace(*cp); cp++)
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97 ;
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98 if (*cp == '\0' || *cp == '#')
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99 return;
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100 for (np = cp; *cp && !isspace(*cp); cp++)
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101 ;
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102 if (*cp)
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103 *cp++ = '\0';
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104 if (!strcmp(np, "bind-ip")) {
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105 handler = handle_ip;
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106 var = &sip_bind_ip;
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107 set_id = 1;
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108 } else if (!strcmp(np, "bind-port")) {
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109 handler = handle_num;
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110 var = &sip_bind_port;
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111 set_id = 2;
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112 } else if (!strcmp(np, "use-100rel")) {
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113 handler = handle_bool;
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114 var = &cfg_use_100rel;
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115 set_id = 0;
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116 } else {
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117 fprintf(stderr, "%s line %d: non-understood keyword \"%s\"\n",
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118 config_file_pathname, st->lineno, np);
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119 exit(1);
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120 }
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121 if (st->set_mask & set_id) {
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122 fprintf(stderr, "%s line %d: duplicate %s setting\n",
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123 config_file_pathname, st->lineno, np);
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124 exit(1);
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125 }
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126 while (isspace(*cp))
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127 cp++;
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128 if (*cp == '\0' || *cp == '#') {
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129 inv_syntax: fprintf(stderr,
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130 "%s line %d: %s setting requires one argument\n",
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131 config_file_pathname, st->lineno, np);
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132 exit(1);
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133 }
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134 for (arg = 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 while (isspace(*cp))
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139 cp++;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 if (*cp != '\0' && *cp != '#')
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 goto inv_syntax;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 handler(st, np, var, arg);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 st->set_mask |= set_id;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 read_config_file()
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 FILE *inf;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 struct parse_state pst;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 char linebuf[256];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 inf = fopen(config_file_pathname, "r");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 if (!inf) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 perror(config_file_pathname);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 pst.set_mask = 0;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 for (pst.lineno = 1; fgets(linebuf, sizeof linebuf, inf); pst.lineno++)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 process_line(&pst, linebuf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 fclose(inf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 if (pst.set_mask != 3) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 fprintf(stderr, "error: %s did not set all required settings\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 config_file_pathname);
62f39c7cee15 themwi-sip-in skeleton started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 }
62f39c7cee15 themwi-sip-in skeleton started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 }