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1 /***************************************************************************
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2 * Copyright (C) 2005 by 510 Software Group *
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3 * *
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4 * *
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5 * This program is free software; you can redistribute it and/or modify *
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6 * it under the terms of the GNU General Public License as published by *
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7 * the Free Software Foundation; either version 2 of the License, or *
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8 * (at your option) any later version. *
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9 * *
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10 * This program is distributed in the hope that it will be useful, *
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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13 * GNU General Public License for more details. *
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14 * *
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15 * You should have received a copy of the GNU General Public License *
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16 * along with this program; if not, write to the *
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17 * Free Software Foundation, Inc., *
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18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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19 ***************************************************************************/
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20
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21 #include "includes.h"
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22
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23 static char* syslogconfig_version="$Id$";
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24
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25 char *token_cisco;
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26 char *token_file;
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27 char *token_include;
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28 char *token_lbrace;
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29 char *token_parser;
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30 char *token_rbrace;
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31 char *token_semi;
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32 char *token_ssh;
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33
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34 string_set all_strings; // owns all the strings, only modified by the config loader thread
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35 const int maxlen = 1000; // used for snprintf buffers
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36
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37
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38 CONFIG::CONFIG() {
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39 reference_count = 0;
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40 generation = 0;
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41 load_time = 0;
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42 }
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43
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44
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45 CONFIG::~CONFIG() {
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46 for (syslogconfig_list::iterator i=syslogconfigs.begin(); i!=syslogconfigs.end(); i++) {
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47 SYSLOGCONFIG *c = *i;
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48 delete c;
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49 }
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50 }
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51
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52
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53 void CONFIG::add_syslogconfig(SYSLOGCONFIGP con) {
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54 syslogconfigs.push_back(con);
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55 }
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56
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57
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58 void CONFIG::dump() {
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59 for (syslogconfig_list::iterator i=syslogconfigs.begin(); i!=syslogconfigs.end(); i++) {
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60 SYSLOGCONFIGP c = *i;
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61 c->dump(0);
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62 }
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63 }
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64
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65
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66 SYSLOGCONFIG::SYSLOGCONFIG(char *file_name_, parser_style parser_) {
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67 file_name = file_name_;
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68 parser = parser_;
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69 }
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70
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71
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72 SYSLOGCONFIG::~SYSLOGCONFIG() {
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73 }
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74
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75
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76 void SYSLOGCONFIG::dump(int level) {
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77 char indent[maxlen];
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78 int i = min(maxlen-1, level*4);
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79 memset(indent, ' ', i);
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80 indent[i] = '\0';
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81 char buf[maxlen];
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82 printf("%s file \"%s\" {\n", indent, file_name);
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83 switch (parser) {
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84 case cisco:
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85 printf("%s parser cisco; \n", indent);
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86 break;
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87 case ssh:
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88 printf("%s parser ssh; \n", indent);
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89 break;
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90 }
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91 printf("%s }; \n", indent);
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92 }
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93
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94
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95 ////////////////////////////////////////////////
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96 // helper to discard the strings held by a string_set
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97 //
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98 void discard(string_set &s) {
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99 for (string_set::iterator i=s.begin(); i!=s.end(); i++) {
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100 free(*i);
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101 }
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102 s.clear();
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103 }
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104
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105
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106 ////////////////////////////////////////////////
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107 // helper to register a string in a string set
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108 //
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109 char* register_string(string_set &s, char *name) {
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110 string_set::iterator i = s.find(name);
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111 if (i != s.end()) return *i;
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112 char *x = strdup(name);
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113 s.insert(x);
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114 return x;
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115 }
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116
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117
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118 ////////////////////////////////////////////////
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119 // register a global string
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120 //
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121 char* register_string(char *name) {
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122 return register_string(all_strings, name);
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123 }
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124
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125
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126 ////////////////////////////////////////////////
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127 //
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128 bool tsa(TOKEN &tok, char *token);
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129 bool tsa(TOKEN &tok, char *token) {
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130 char *have = tok.next();
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131 if (have == token) return true;
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132 tok.token_error(token, have);
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133 return false;
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134 }
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135
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136
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137 ////////////////////////////////////////////////
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138 //
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139 bool parse_syslogconfig(TOKEN &tok, CONFIG &dc);
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140 bool parse_syslogconfig(TOKEN &tok, CONFIG &dc) {
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141 char *name = tok.next();
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142 parser_style parser;
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143 if (!tsa(tok, token_lbrace)) return false;
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144 while (true) {
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145 char *have = tok.next();
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146 if (have == token_parser) {
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147 have = tok.next();
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148 if (have == token_cisco) parser = cisco;
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149 else if (have == token_ssh) parser = ssh;
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150 else {
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151 tok.token_error("cisco/ssh", have);
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152 return false;
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153 }
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154 if (!tsa(tok, token_semi)) return false;
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155 }
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156 else if (have == token_rbrace) {
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157 break; // done
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158 }
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159 else {
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160 tok.token_error("file keyword", have);
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161 return false;
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162 }
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163 }
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164 if (!tsa(tok, token_semi)) return false;
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165 SYSLOGCONFIGP con = new SYSLOGCONFIG(name, parser);
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166 dc.add_syslogconfig(con);
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167 return true;
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168 }
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169
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170
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171 ////////////////////////////////////////////////
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172 // parse a config file
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173 //
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174 bool load_conf(CONFIG &dc, char *fn) {
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175 int count = 0;
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176 TOKEN tok(fn, &dc.config_files);
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177 while (true) {
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178 char *have = tok.next();
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179 if (!have) break;
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180 if (have == token_file) {
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181 if (!parse_syslogconfig(tok, dc)) {
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182 tok.token_error("load_conf() failed to parse syslogconfig");
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183 return false;
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184 }
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185 else count++;
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186 }
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187 else {
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188 tok.token_error(token_file, have);
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189 return false;
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190 }
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191 }
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192 tok.token_error("load_conf() found %d syslog files in %s", count, fn);
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193 return (!dc.syslogconfigs.empty());
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194 }
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195
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196
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197 ////////////////////////////////////////////////
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198 // init the tokens
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199 //
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200 void token_init() {
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201 token_cisco = register_string("cisco");
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202 token_file = register_string("file");
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203 token_include = register_string("include");
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204 token_lbrace = register_string("{");
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205 token_parser = register_string("parser");
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206 token_rbrace = register_string("}");
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207 token_semi = register_string(";");
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208 token_ssh = register_string("ssh");
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209 }
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