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1 /*
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2
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3 Copyright (c) 2004 Carl Byington - 510 Software Group, released under
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4 the GPL version 2 or any later version at your choice available at
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5 http://www.fsf.org/licenses/gpl.txt
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6
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7 */
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8
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9 #include "includes.h"
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10
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11 // needed for socket io
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12 #include <unistd.h>
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13 #include <sys/ioctl.h>
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14 #include <net/if.h>
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15 #include <arpa/inet.h>
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16 #include <netinet/in.h>
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17 #include <netinet/tcp.h>
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18 #include <netdb.h>
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19 #include <sys/socket.h>
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20 #include <sys/un.h>
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21
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22 static char* context_version="$Id$";
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23
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24 char *token_envfrom;
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25 char *token_lbrace;
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26 char *token_rbrace;
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27 char *token_rcptto;
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28 char *token_semi;
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29
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30 string_set all_strings; // owns all the strings, only modified by the config loader thread
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31 const int maxlen = 1000; // used for snprintf buffers
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32
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33 CONFIG::CONFIG() {
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34 reference_count = 0;
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35 generation = 0;
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36 load_time = 0;
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37 }
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38
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39
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40 CONFIG::~CONFIG() {
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41 }
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42
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43
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44 char *CONFIG::find(char *needle, &string_map haystack) {
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45 string_map::iterator i = haystack.find(needle);
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46 if (i != haystack.end()) return (*i).second; // found user@domain.tld key
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47 char *x = strchr(needle, '@');
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48 if (x) {
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49 x++;
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50 i = haystack.find(x);
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51 if (i != haystack.end()) return (*i).second; // found domain.tld key
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52 char y = *x;
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53 *x = '\0';
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54 i = haystack.find(needle);
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55 *x = y;
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56 if (i != haystack.end()) return (*i).second; // found user@ key
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57 }
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58 return NULL;
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59 }
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60
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61
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62 void CONFIG::dump() {
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63 printf("rcpt_to {\n");
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64 for (string_map::iterator i=rcpt_to.begin(); i!=rcpt_to.end(); i++) {
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65 char *to = (*i).first;
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66 char *target = (*i).second;
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67 printf(" %s \t %s\n", to, target);
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68 }
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69 printf("};\n");
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70 printf("env_from {\n");
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71 for (string_map::iterator i=env_from.begin(); i!=env_from.end(); i++) {
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72 char *from = (*i).first;
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73 char *target = (*i).second;
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74 printf(" %s \t %s\n", from, target);
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75 }
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76 printf("};\n");
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77 }
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78
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79
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80 ////////////////////////////////////////////////
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81 // helper to discard the strings held by a string_set
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82 //
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83 void discard(string_set &s) {
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84 for (string_set::iterator i=s.begin(); i!=s.end(); i++) {
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85 free(*i);
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86 }
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87 s.clear();
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88 }
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89
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90
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91 ////////////////////////////////////////////////
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92 // helper to register a string in a string set
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93 //
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94 char* register_string(string_set &s, char *name) {
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95 string_set::iterator i = s.find(name);
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96 if (i != s.end()) return *i;
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97 char *x = strdup(name);
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98 s.insert(x);
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99 return x;
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100 }
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101
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102
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103 ////////////////////////////////////////////////
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104 // register a global string
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105 //
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106 char* register_string(char *name) {
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107 return register_string(all_strings, name);
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108 }
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109
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110
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111 ////////////////////////////////////////////////
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112 //
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113 bool tsa(TOKEN &tok, char *token);
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114 bool tsa(TOKEN &tok, char *token) {
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115 char *have = tok.next();
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116 if (have == token) return true;
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117 tok.token_error(token, have);
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118 return false;
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119 }
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120
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121
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122 ////////////////////////////////////////////////
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123 //
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124 bool parse_rcpt_to(TOKEN &tok, CONFIG &dc);
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125 bool parse_rcpt_to(TOKEN &tok, CONFIG &dc) {
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126 if (!tsa(tok, token_lbrace)) return false;
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127 while (true) {
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128 char *have = tok.next();
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129 if (!have) break;
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130 if (have == token_rbrace) break;
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131 if (have == token_semi) {
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132 // optional separators
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133 }
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134 else {
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135 char *target = tok.next();
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136 dc.add_to(have, target);
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137 }
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138 }
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139 return tsa(tok, token_semi);
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140 }
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141
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142
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143 ////////////////////////////////////////////////
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144 //
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145 bool parse_env_from(TOKEN &tok, CONFIG &dc);
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146 bool parse_env_from(TOKEN &tok, CONFIG &dc) {
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147 if (!tsa(tok, token_lbrace)) return false;
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148 while (true) {
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149 char *have = tok.next();
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150 if (!have) break;
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151 if (have == token_rbrace) break;
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152 if (have == token_semi) {
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153 // optional separators
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154 }
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155 else {
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156 char *target = tok.next();
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157 dc.add_from(have, target);
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158 }
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159 }
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160 return tsa(tok, token_semi);
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161 }
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162
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163
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164 ////////////////////////////////////////////////
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165 // parse a config file
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166 //
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167 bool load_conf(CONFIG &dc, char *fn) {
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168 TOKEN tok(fn, &dc.config_files);
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169 while (true) {
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170 char *have = tok.next();
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171 if (!have) break;
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172 if (have == token_envfrom) {
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173 if (!parse_env_from(tok, dc)) {
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174 tok.token_error("load_conf() failed to parse env_from");
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175 return false;
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176 }
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177 }
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178 else if (have == token_rcptto) {
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179 if (!parse_rcpt_to(tok, dc)) {
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180 tok.token_error("load_conf() failed to parse rcpt_to");
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181 return false;
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182 }
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183 }
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184 else {
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185 tok.token_error(token_context, have);
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186 return false;
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187 }
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188 }
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189 return true;
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190 }
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191
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192
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193 ////////////////////////////////////////////////
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194 // init the tokens
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195 //
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196 void token_init() {
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197 token_envfrom = register_string("env_from");
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198 token_lbrace = register_string("{");
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199 token_rbrace = register_string("}");
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200 token_rcptto = register_string("rcpt_to");
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201 token_semi = register_string(";");
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202 }
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