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1 /*
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2
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3 Copyright (c) 2007 Carl Byington - 510 Software Group, released under
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4 the GPL version 3 or any later version at your choice available at
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5 http://www.gnu.org/licenses/gpl-3.0.txt
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0
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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 char *token_envfrom;
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3
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12 char *token_include;
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0
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13 char *token_lbrace;
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14 char *token_rbrace;
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15 char *token_rcptto;
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13
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16 char *token_remove;
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0
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17 char *token_semi;
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18
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19 string_set all_strings; // owns all the strings, only modified by the config loader thread
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20 const int maxlen = 1000; // used for snprintf buffers
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21
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22 CONFIG::CONFIG() {
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23 reference_count = 0;
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24 generation = 0;
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25 load_time = 0;
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26 }
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27
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28
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29 CONFIG::~CONFIG() {
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30 }
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31
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32
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13
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33 bool CONFIG::find(char *needle, string_set &haystack) {
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34 string_set::iterator i = haystack.find(needle);
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35 if (i != haystack.end()) return true; // found user@domain.tld key
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0
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36 char *x = strchr(needle, '@');
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37 if (x) {
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38 x++;
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39 i = haystack.find(x);
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40 if (i != haystack.end()) return true; // found domain.tld key
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0
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41 char y = *x;
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42 *x = '\0';
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43 i = haystack.find(needle);
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44 *x = y;
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45 if (i != haystack.end()) return true; // found user@ key
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46 }
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47 return false;
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48 }
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49
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50
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51 char *CONFIG::find(char *needle, string_map &haystack) {
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52 string_map::iterator i = haystack.find(needle);
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53 if (i != haystack.end()) return (*i).second; // found user@domain.tld key
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54 char *x = strchr(needle, '@');
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55 if (x) {
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56 x++;
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57 i = haystack.find(x);
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58 if (i != haystack.end()) return (*i).second; // found domain.tld key
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59 char y = *x;
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60 *x = '\0';
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61 i = haystack.find(needle);
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62 *x = y;
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63 if (i != haystack.end()) return (*i).second; // found user@ key
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0
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64 }
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65 return NULL;
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66 }
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67
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68
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69 void CONFIG::dump() {
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70 printf("rcpt_to {\n");
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71 for (string_map::iterator i=rcpt_to.begin(); i!=rcpt_to.end(); i++) {
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72 char *to = (*i).first;
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73 char *target = (*i).second;
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74 if (!target) target = "\"\"";
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75 bool rem = find_remove(to);
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76 printf(" %s \t %s%s;\n", to, target, (rem) ? " remove" : "");
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0
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77 }
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78 printf("};\n");
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79 printf("env_from {\n");
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80 for (string_map::iterator i=env_from.begin(); i!=env_from.end(); i++) {
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81 char *from = (*i).first;
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82 char *target = (*i).second;
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83 if (!target) target = "\"\"";
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84 printf(" %s \t %s;\n", from, target);
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85 }
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86 printf("};\n");
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87 }
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88
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89
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90 ////////////////////////////////////////////////
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91 // helper to discard the strings held by a string_set
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92 //
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93 void discard(string_set &s) {
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94 for (string_set::iterator i=s.begin(); i!=s.end(); i++) {
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95 free(*i);
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96 }
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97 s.clear();
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98 }
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99
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100
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101 ////////////////////////////////////////////////
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102 // helper to register a string in a string set
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103 //
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104 char* register_string(string_set &s, char *name) {
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105 string_set::iterator i = s.find(name);
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106 if (i != s.end()) return *i;
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107 char *x = strdup(name);
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108 s.insert(x);
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109 return x;
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110 }
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111
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112
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113 ////////////////////////////////////////////////
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114 // register a global string
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115 //
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116 char* register_string(char *name) {
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117 return register_string(all_strings, name);
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118 }
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119
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120
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121 ////////////////////////////////////////////////
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13
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122 // clear all global strings, helper for valgrind checking
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123 //
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124 void clear_strings() {
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125 discard(all_strings);
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126 }
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127
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128
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129 ////////////////////////////////////////////////
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0
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130 //
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131 bool tsa(TOKEN &tok, char *token);
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132 bool tsa(TOKEN &tok, char *token) {
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133 char *have = tok.next();
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134 if (have == token) return true;
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135 tok.token_error(token, have);
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136 return false;
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137 }
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138
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139
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140 ////////////////////////////////////////////////
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141 //
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142 bool parse_rcpt_to(TOKEN &tok, CONFIG &dc);
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143 bool parse_rcpt_to(TOKEN &tok, CONFIG &dc) {
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144 if (!tsa(tok, token_lbrace)) return false;
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145 while (true) {
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146 char *have = tok.next();
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147 if (!have) break;
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148 if (have == token_rbrace) break;
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149 char *target = tok.next();
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150 dc.add_to(have, target);
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151 target = tok.next();
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152 if (target == token_remove) {
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153 dc.add_remove(have);
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154 target = tok.next();
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0
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155 }
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156 if (target != token_semi) {
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157 tok.token_error(token_semi, target);
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158 break;
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0
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159 }
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160 }
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161 return tsa(tok, token_semi);
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162 }
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163
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164
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165 ////////////////////////////////////////////////
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166 //
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167 bool parse_env_from(TOKEN &tok, CONFIG &dc);
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168 bool parse_env_from(TOKEN &tok, CONFIG &dc) {
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169 if (!tsa(tok, token_lbrace)) return false;
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170 while (true) {
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171 char *have = tok.next();
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172 if (!have) break;
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173 if (have == token_rbrace) break;
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174 if (have == token_semi) {
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175 // optional separators
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176 }
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177 else {
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178 char *target = tok.next();
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179 dc.add_from(have, target);
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180 }
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181 }
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182 return tsa(tok, token_semi);
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183 }
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184
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185
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186 ////////////////////////////////////////////////
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187 // parse a config file
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188 //
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189 bool load_conf(CONFIG &dc, char *fn) {
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190 TOKEN tok(fn, &dc.config_files);
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191 while (true) {
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192 char *have = tok.next();
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193 if (!have) break;
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194 if (have == token_envfrom) {
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195 if (!parse_env_from(tok, dc)) {
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196 tok.token_error("load_conf() failed to parse env_from");
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197 return false;
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198 }
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199 }
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200 else if (have == token_rcptto) {
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201 if (!parse_rcpt_to(tok, dc)) {
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202 tok.token_error("load_conf() failed to parse rcpt_to");
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203 return false;
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204 }
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205 }
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206 else {
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3
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207 tok.token_error("env_from/rcpt_to", have);
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0
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208 return false;
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209 }
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210 }
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211 return true;
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212 }
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213
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214
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215 ////////////////////////////////////////////////
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216 // init the tokens
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217 //
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218 void token_init() {
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219 token_envfrom = register_string("env_from");
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3
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220 token_include = register_string("include");
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0
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221 token_lbrace = register_string("{");
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222 token_rbrace = register_string("}");
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223 token_rcptto = register_string("rcpt_to");
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13
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224 token_remove = register_string("remove");
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0
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225 token_semi = register_string(";");
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226 }
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