annotate src/syslogconfig.cpp @ 30:718e94b6b049 stable-1-3

make add/remove commands configureable
author carl
date Sun, 12 Feb 2006 11:34:37 -0800
parents 6465d8640489
children 601bc0e075e1
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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 #include <fcntl.h>
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23 #include <sys/socket.h>
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24 #include <netinet/in.h>
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25 #include <arpa/inet.h>
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26 #include <netdb.h>
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27 #include <limits.h>
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28
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29 static char* syslogconfig_version = "$Id$";
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30
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31 char *token_add;
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32 char *token_bucket;
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33 char *token_file;
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34 char *token_ignore;
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35 char *token_include;
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36 char *token_index;
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37 char *token_lbrace;
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38 char *token_pattern;
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39 char *token_rbrace;
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40 char *token_remove;
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41 char *token_semi;
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42 char *token_slash;
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43 char *token_threshold;
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44
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45 struct ltint
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46 {
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47 bool operator()(const int s1, const int s2) const
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48 {
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49 return (unsigned)s1 < (unsigned)s2;
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50 }
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51 };
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52
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53 struct bucket {
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54 int count;
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55 bool latch; // true iff ever count>threshold
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56 };
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57
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58 string_set all_strings; // owns all the strings, only modified by the config loader thread
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59 const int maxlen = 1000; // used for snprintf buffers
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60 typedef map<int, bucket, ltint> ip_buckets;
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61
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62 class IPR {
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63 ip_buckets violations;
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64 public:
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65 void add(int ip, int amount, CONFIG &con, char *file_name, int pattern_index);
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66 void leak(int amount, CONFIG &con);
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67 void update(int ip, bool added, char *file_name, int pattern_index);
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68 void changed(CONFIG &con, int ip, bool added);
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69 };
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70
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71 IPR recorder;
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72
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73
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74 ////////////////////////////////////////////////
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75 //
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76 void IPR::add(int ip, int amount, CONFIG &con, char *file_name, int pattern_index) {
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77 if (con.looking(ip)) {
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78 ip_buckets::iterator i = violations.find(ip);
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79 if (i == violations.end()) {
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80 bucket b;
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81 b.count = amount;
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82 b.latch = (con.get_threshold() <= b.count);
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83 violations[ip] = b;
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84 if (b.latch) {
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85 update(ip, true, file_name, pattern_index);
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86 changed(con, ip, true);
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87 }
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88 }
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89 else {
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90 bucket &b = (*i).second;
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91 if (b.count < (INT_MAX-amount)) {
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92 int t = con.get_threshold();
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93 int c = b.count;
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94 b.count += amount;
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95 if ((!b.latch) && (c < t) && (t <= b.count)) {
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96 b.latch = true;
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97 update(ip, true, file_name, pattern_index);
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98 changed(con, ip, true);
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99 }
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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
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105
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106 void IPR::leak(int amount, CONFIG &con) {
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107 for (ip_buckets::iterator i=violations.begin(); i!=violations.end(); ) {
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108 int ip = (*i).first;
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109 bucket &b = (*i).second;
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110 if (b.count <= amount) {
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111 if (b.latch) {
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112 update(ip, false, NULL, 0);
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113 changed(con, ip, false);
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114 }
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115 violations.erase(i++);
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116 }
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117 else {
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118 b.count -= amount;
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119 i++;
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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
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125 void IPR::update(int ip, bool added, char *file_name, int pattern_index) {
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126 if (debug_syslog > 2) {
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127 char buf[maxlen];
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128 in_addr ad;
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129 ad.s_addr = htonl(ip);
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130 if (added) snprintf(buf, maxlen, "dropping traffic from/to %s based on pattern match %d in %s", inet_ntoa(ad), pattern_index, file_name);
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131 else snprintf(buf, maxlen, "allowing traffic from/to %s", inet_ntoa(ad));
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132 my_syslog(buf);
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133 }
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134 }
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135
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136
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137 void IPR::changed(CONFIG &con, int ip, bool added) {
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138 int t = con.get_threshold();
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139 char buf[maxlen];
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140 if (added) {
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141 bucket &b = violations[ip];
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142 if (con.looking(ip) && (b.count > t)) {
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143 in_addr ad;
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144 ad.s_addr = htonl(ip);
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145 snprintf(buf, maxlen, con.add_command, inet_ntoa(ad));
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146 system(buf);
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147 }
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148 }
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149 else {
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150 in_addr ad;
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151 ad.s_addr = htonl(ip);
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152 snprintf(buf, maxlen, con.remove_command, inet_ntoa(ad));
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153 system(buf);
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154 }
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155 }
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156
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157
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158 ////////////////////////////////////////////////
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159 //
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160 int ip_address(char *have);
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161 int ip_address(char *have) {
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162 int ipaddr = 0;
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163 in_addr ip;
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164 if (inet_aton(have, &ip)) ipaddr = ip.s_addr;
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165 else {
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166 struct hostent *host = gethostbyname(have);
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167 if (host && host->h_addrtype == AF_INET) memcpy(&ipaddr, host->h_addr, sizeof(ipaddr));
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168 }
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169 return ntohl(ipaddr);
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170 }
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171
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172
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173 ////////////////////////////////////////////////
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174 //
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175 PATTERN::PATTERN(TOKEN &tok, char *pattern_, int index_, int amount_) {
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176 pattern = pattern_;
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177 index = index_;
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178 amount = amount_;
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179 if (pattern) {
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180 int rc = regcomp(&re, pattern, REG_ICASE | REG_EXTENDED);
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181 if (rc) {
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182 char bu[maxlen];
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183 regerror(rc, &re, bu, maxlen);
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184 char buf[maxlen];
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185 snprintf(buf, sizeof(buf), "pattern %s not valid - %s", pattern, bu);
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186 tok.token_error(buf);
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187 pattern = NULL;
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188 }
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189 }
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190 }
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191
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192
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193 PATTERN::~PATTERN() {
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194 regfree(&re);
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195 }
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196
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197
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198 bool PATTERN::process(char *buf, CONFIG &con, char *file_name, int pattern_index) {
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199 if (pattern) {
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200 const int nmatch = index+1;
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201 regmatch_t match[nmatch];
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202 if (0 == regexec(&re, buf, nmatch, match, 0)) {
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203 int s = match[index].rm_so;
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204 int e = match[index].rm_eo;
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205 if (s != -1) {
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206 if (debug_syslog > 3) {
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207 my_syslog(buf); // show lines with matches
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208 }
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209 buf[e] = '\0';
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210 int ip = ip_address(buf+s);
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211 if (ip) {
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212 recorder.add(ip, amount, con, file_name, pattern_index);
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213 }
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214 return true;
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215 }
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216 }
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217 }
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218 return false;
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219 }
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220
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221
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222 void PATTERN::dump(int level) {
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223 char indent[maxlen];
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224 int i = min(maxlen-1, level*4);
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225 memset(indent, ' ', i);
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226 indent[i] = '\0';
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diff changeset
227 printf("%s pattern \"%s\" {; \n", indent, pattern);
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diff changeset
228 printf("%s index %d; \n", indent, index);
4
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229 printf("%s bucket %d; \n", indent, amount);
3
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230 printf("%s }; \n", indent);
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diff changeset
231 }
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diff changeset
232
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233
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234 ////////////////////////////////////////////////
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diff changeset
235 //
1
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236 CONFIG::CONFIG() {
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237 reference_count = 0;
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238 generation = 0;
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239 load_time = 0;
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240 threshold = 500;
28fec0c67646 make add/remove commands configureable
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diff changeset
241 add_command = "/sbin/iptables -I INPUT --src %s --jump DROP";
28fec0c67646 make add/remove commands configureable
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diff changeset
242 remove_command = "/sbin/iptables -D INPUT --src %s --jump DROP";
1
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243 }
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244
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245
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246 CONFIG::~CONFIG() {
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247 for (syslogconfig_list::iterator i=syslogconfigs.begin(); i!=syslogconfigs.end(); i++) {
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248 SYSLOGCONFIG *c = *i;
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249 delete c;
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250 }
3
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diff changeset
251 ignore.clear();
1
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252 }
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253
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254
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255 void CONFIG::add_syslogconfig(SYSLOGCONFIGP con) {
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256 syslogconfigs.push_back(con);
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257 }
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258
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259
3
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diff changeset
260 void CONFIG::add_pair(IPPAIR pair) {
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261 ignore.push_back(pair);
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262 }
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263
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264
1
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265 void CONFIG::dump() {
3
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266 printf(" threshold %d; \n\n", threshold);
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267
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268 printf(" add_command \"%s\"; \n", add_command);
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269 printf(" remove_command \"%s\"; \n\n", remove_command);
28fec0c67646 make add/remove commands configureable
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diff changeset
270
3
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271 printf(" ignore { \n");
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272 for (ippair_list::iterator i=ignore.begin(); i!=ignore.end(); i++) {
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273 IPPAIR &p = *i;
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274 in_addr ip;
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275 ip.s_addr = htonl(p.first);
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276 printf(" %s/%d; \n", inet_ntoa(ip), p.cidr);
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277 }
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278 printf(" }; \n\n");
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279
1
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280 for (syslogconfig_list::iterator i=syslogconfigs.begin(); i!=syslogconfigs.end(); i++) {
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281 SYSLOGCONFIGP c = *i;
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282 c->dump(0);
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283 }
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284 }
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285
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286
2
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diff changeset
287 void CONFIG::read() {
3
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diff changeset
288 while (true) {
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289 bool have = false;
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290 for (syslogconfig_list::iterator i=syslogconfigs.begin(); i!=syslogconfigs.end(); i++) {
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291 SYSLOGCONFIGP c = *i;
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292 have |= c->read(*this);
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293 }
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294 if (!have) break;
2
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295 }
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parents: 1
diff changeset
296 }
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diff changeset
297
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298
4
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299 void CONFIG::sleep(int duration, time_t &previous) {
3
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300 ::sleep(duration);
4
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301 time_t now = time(NULL);
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302 recorder.leak(now-previous, *this);
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303 previous = now;
3
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diff changeset
304 }
8fe310e5cd44 initial coding
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305
8fe310e5cd44 initial coding
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306
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diff changeset
307 bool CONFIG::looking(int ip) {
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308 for (ippair_list::iterator i=ignore.begin(); i!=ignore.end(); i++) {
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309 IPPAIR &p = *i;
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310 if ((p.first <= ip) && (ip <= p.last)) return false;
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311 }
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312 return true;
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313 }
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314
8fe310e5cd44 initial coding
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diff changeset
315 ////////////////////////////////////////////////
8fe310e5cd44 initial coding
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diff changeset
316 //
8fe310e5cd44 initial coding
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317 SYSLOGCONFIG::SYSLOGCONFIG(TOKEN &tok, char *file_name_) {
4
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318 tokp = &tok;
2
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319 file_name = file_name_;
4
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320 open(true);
1
551433a01cab initial coding
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321 }
551433a01cab initial coding
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322
551433a01cab initial coding
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323
551433a01cab initial coding
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324 SYSLOGCONFIG::~SYSLOGCONFIG() {
4
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diff changeset
325 close();
3
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diff changeset
326 for (pattern_list::iterator i=patterns.begin(); i!=patterns.end(); i++) {
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diff changeset
327 PATTERN *p = *i;
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328 delete p;
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329 }
2
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diff changeset
330 }
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parents: 1
diff changeset
331
6e88da080f08 initial coding
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diff changeset
332
4
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diff changeset
333 void SYSLOGCONFIG::open(bool msg) {
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334 fd = ::open(file_name, O_RDONLY);
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335 len = 0;
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336 if (fd == -1) {
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337 if (msg) {
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diff changeset
338 char buf[maxlen];
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339 snprintf(buf, sizeof(buf), "syslog file %s not readable", file_name);
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340 tokp->token_error(buf);
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diff changeset
341 }
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342 }
2737ab01659a initial coding
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diff changeset
343 else {
5
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344 if (debug_syslog > 1) {
276c4edc8521 initial coding
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345 snprintf(buf, sizeof(buf), "syslog file %s opened", file_name);
276c4edc8521 initial coding
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346 my_syslog(buf);
276c4edc8521 initial coding
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347 }
4
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diff changeset
348 lseek(fd, 0, SEEK_END);
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diff changeset
349 if (fstat(fd, &openfdstat)) {
2737ab01659a initial coding
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350 close();
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diff changeset
351 snprintf(buf, sizeof(buf), "syslog file %s cannot stat after open", file_name);
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diff changeset
352 tokp->token_error(buf);
2737ab01659a initial coding
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diff changeset
353 }
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diff changeset
354 }
3
8fe310e5cd44 initial coding
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diff changeset
355 }
8fe310e5cd44 initial coding
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diff changeset
356
8fe310e5cd44 initial coding
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diff changeset
357
8fe310e5cd44 initial coding
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diff changeset
358 bool SYSLOGCONFIG::read(CONFIG &con) {
4
2737ab01659a initial coding
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diff changeset
359 if (failed()) {
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diff changeset
360 open(false);
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361 if (failed()) return false;
2737ab01659a initial coding
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diff changeset
362 }
3
8fe310e5cd44 initial coding
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diff changeset
363 int n = ::read(fd, buf+len, buflen-len);
8fe310e5cd44 initial coding
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diff changeset
364 bool have = (n > 0);
8fe310e5cd44 initial coding
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diff changeset
365 if (have) {
2
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diff changeset
366 len += n;
6e88da080f08 initial coding
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parents: 1
diff changeset
367 while (true) {
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diff changeset
368 char *p = (char*)memchr(buf, '\n', len);
6e88da080f08 initial coding
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diff changeset
369 if (!p) break;
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diff changeset
370 n = p-buf;
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diff changeset
371 *p = '\0';
3
8fe310e5cd44 initial coding
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diff changeset
372 process(con); // process null terminated string
2
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diff changeset
373 len -= n+1;
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diff changeset
374 memmove(buf, p+1, len);
6e88da080f08 initial coding
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diff changeset
375 }
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diff changeset
376 // no <lf> in a full buffer
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diff changeset
377 if (len == buflen) len = 0;
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diff changeset
378 }
4
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diff changeset
379 else {
2737ab01659a initial coding
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diff changeset
380 // check for file close
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diff changeset
381 struct stat filenamest;
2737ab01659a initial coding
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diff changeset
382 if (0 == stat(file_name, &filenamest)) {
2737ab01659a initial coding
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diff changeset
383 if ((filenamest.st_dev != openfdstat.st_dev) ||
2737ab01659a initial coding
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parents: 3
diff changeset
384 (filenamest.st_ino != openfdstat.st_ino)) {
2737ab01659a initial coding
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diff changeset
385 close();
2737ab01659a initial coding
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diff changeset
386 }
2737ab01659a initial coding
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diff changeset
387 }
2737ab01659a initial coding
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diff changeset
388 else {
2737ab01659a initial coding
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diff changeset
389 // filename no longer exists
2737ab01659a initial coding
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diff changeset
390 close();
2737ab01659a initial coding
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diff changeset
391 }
2737ab01659a initial coding
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diff changeset
392 }
3
8fe310e5cd44 initial coding
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diff changeset
393 return have;
2
6e88da080f08 initial coding
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parents: 1
diff changeset
394 }
6e88da080f08 initial coding
carl
parents: 1
diff changeset
395
6e88da080f08 initial coding
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diff changeset
396
4
2737ab01659a initial coding
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diff changeset
397 void SYSLOGCONFIG::close() {
5
276c4edc8521 initial coding
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diff changeset
398 if (debug_syslog > 1) {
276c4edc8521 initial coding
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parents: 4
diff changeset
399 snprintf(buf, sizeof(buf), "syslog file %s closed", file_name);
276c4edc8521 initial coding
carl
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diff changeset
400 my_syslog(buf);
276c4edc8521 initial coding
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parents: 4
diff changeset
401 }
4
2737ab01659a initial coding
carl
parents: 3
diff changeset
402 if (fd != -1) ::close(fd);
2737ab01659a initial coding
carl
parents: 3
diff changeset
403 fd = -1;
2737ab01659a initial coding
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diff changeset
404 }
2737ab01659a initial coding
carl
parents: 3
diff changeset
405
2737ab01659a initial coding
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diff changeset
406
2737ab01659a initial coding
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diff changeset
407 void SYSLOGCONFIG::add_pattern(PATTERNP pat) {
2737ab01659a initial coding
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diff changeset
408 patterns.push_back(pat);
2737ab01659a initial coding
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diff changeset
409 }
2737ab01659a initial coding
carl
parents: 3
diff changeset
410
2737ab01659a initial coding
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diff changeset
411
3
8fe310e5cd44 initial coding
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parents: 2
diff changeset
412 void SYSLOGCONFIG::process(CONFIG &con) {
20
0d65c3de34fd add better logging
carl
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diff changeset
413 int pi=0;
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
414 for (pattern_list::iterator i=patterns.begin(); i!=patterns.end(); i++) {
8fe310e5cd44 initial coding
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diff changeset
415 PATTERN *p = *i;
20
0d65c3de34fd add better logging
carl
parents: 12
diff changeset
416 if (p->process(buf, con, file_name, pi)) break;
0d65c3de34fd add better logging
carl
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diff changeset
417 pi++;
3
8fe310e5cd44 initial coding
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parents: 2
diff changeset
418 }
1
551433a01cab initial coding
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diff changeset
419 }
551433a01cab initial coding
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parents:
diff changeset
420
551433a01cab initial coding
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parents:
diff changeset
421
551433a01cab initial coding
carl
parents:
diff changeset
422 void SYSLOGCONFIG::dump(int level) {
551433a01cab initial coding
carl
parents:
diff changeset
423 char indent[maxlen];
551433a01cab initial coding
carl
parents:
diff changeset
424 int i = min(maxlen-1, level*4);
551433a01cab initial coding
carl
parents:
diff changeset
425 memset(indent, ' ', i);
551433a01cab initial coding
carl
parents:
diff changeset
426 indent[i] = '\0';
551433a01cab initial coding
carl
parents:
diff changeset
427 char buf[maxlen];
551433a01cab initial coding
carl
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diff changeset
428 printf("%s file \"%s\" {\n", indent, file_name);
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
429 for (pattern_list::iterator i=patterns.begin(); i!=patterns.end(); i++) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
430 PATTERN *p = *i;
4
2737ab01659a initial coding
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parents: 3
diff changeset
431 p->dump(level+1);
3
8fe310e5cd44 initial coding
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parents: 2
diff changeset
432 }
1
551433a01cab initial coding
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parents:
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433 printf("%s }; \n", indent);
551433a01cab initial coding
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parents:
diff changeset
434 }
551433a01cab initial coding
carl
parents:
diff changeset
435
551433a01cab initial coding
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diff changeset
436
551433a01cab initial coding
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parents:
diff changeset
437 ////////////////////////////////////////////////
551433a01cab initial coding
carl
parents:
diff changeset
438 // helper to discard the strings held by a string_set
551433a01cab initial coding
carl
parents:
diff changeset
439 //
551433a01cab initial coding
carl
parents:
diff changeset
440 void discard(string_set &s) {
551433a01cab initial coding
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parents:
diff changeset
441 for (string_set::iterator i=s.begin(); i!=s.end(); i++) {
551433a01cab initial coding
carl
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442 free(*i);
551433a01cab initial coding
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parents:
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443 }
551433a01cab initial coding
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444 s.clear();
551433a01cab initial coding
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445 }
551433a01cab initial coding
carl
parents:
diff changeset
446
551433a01cab initial coding
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diff changeset
447
551433a01cab initial coding
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parents:
diff changeset
448 ////////////////////////////////////////////////
551433a01cab initial coding
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parents:
diff changeset
449 // helper to register a string in a string set
551433a01cab initial coding
carl
parents:
diff changeset
450 //
551433a01cab initial coding
carl
parents:
diff changeset
451 char* register_string(string_set &s, char *name) {
551433a01cab initial coding
carl
parents:
diff changeset
452 string_set::iterator i = s.find(name);
551433a01cab initial coding
carl
parents:
diff changeset
453 if (i != s.end()) return *i;
551433a01cab initial coding
carl
parents:
diff changeset
454 char *x = strdup(name);
551433a01cab initial coding
carl
parents:
diff changeset
455 s.insert(x);
551433a01cab initial coding
carl
parents:
diff changeset
456 return x;
551433a01cab initial coding
carl
parents:
diff changeset
457 }
551433a01cab initial coding
carl
parents:
diff changeset
458
551433a01cab initial coding
carl
parents:
diff changeset
459
551433a01cab initial coding
carl
parents:
diff changeset
460 ////////////////////////////////////////////////
551433a01cab initial coding
carl
parents:
diff changeset
461 // register a global string
551433a01cab initial coding
carl
parents:
diff changeset
462 //
551433a01cab initial coding
carl
parents:
diff changeset
463 char* register_string(char *name) {
551433a01cab initial coding
carl
parents:
diff changeset
464 return register_string(all_strings, name);
551433a01cab initial coding
carl
parents:
diff changeset
465 }
551433a01cab initial coding
carl
parents:
diff changeset
466
551433a01cab initial coding
carl
parents:
diff changeset
467
551433a01cab initial coding
carl
parents:
diff changeset
468 ////////////////////////////////////////////////
551433a01cab initial coding
carl
parents:
diff changeset
469 //
551433a01cab initial coding
carl
parents:
diff changeset
470 bool tsa(TOKEN &tok, char *token);
551433a01cab initial coding
carl
parents:
diff changeset
471 bool tsa(TOKEN &tok, char *token) {
551433a01cab initial coding
carl
parents:
diff changeset
472 char *have = tok.next();
551433a01cab initial coding
carl
parents:
diff changeset
473 if (have == token) return true;
551433a01cab initial coding
carl
parents:
diff changeset
474 tok.token_error(token, have);
551433a01cab initial coding
carl
parents:
diff changeset
475 return false;
551433a01cab initial coding
carl
parents:
diff changeset
476 }
551433a01cab initial coding
carl
parents:
diff changeset
477
551433a01cab initial coding
carl
parents:
diff changeset
478
551433a01cab initial coding
carl
parents:
diff changeset
479 ////////////////////////////////////////////////
551433a01cab initial coding
carl
parents:
diff changeset
480 //
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
481 bool parse_pattern(TOKEN &tok, SYSLOGCONFIG &con);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
482 bool parse_pattern(TOKEN &tok, SYSLOGCONFIG &con) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
483 char *pat = tok.next();
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
484 int ind, buc;
1
551433a01cab initial coding
carl
parents:
diff changeset
485 if (!tsa(tok, token_lbrace)) return false;
551433a01cab initial coding
carl
parents:
diff changeset
486 while (true) {
551433a01cab initial coding
carl
parents:
diff changeset
487 char *have = tok.next();
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
488 if (!have) break;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
489 if (have == token_rbrace) break;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
490 if (have == token_index) {
1
551433a01cab initial coding
carl
parents:
diff changeset
491 have = tok.next();
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
492 ind = atoi(have);
1
551433a01cab initial coding
carl
parents:
diff changeset
493 if (!tsa(tok, token_semi)) return false;
551433a01cab initial coding
carl
parents:
diff changeset
494 }
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
495 else if (have == token_bucket) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
496 have = tok.next();
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
497 buc = atoi(have);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
498 if (!tsa(tok, token_semi)) return false;
1
551433a01cab initial coding
carl
parents:
diff changeset
499 }
551433a01cab initial coding
carl
parents:
diff changeset
500 else {
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
501 tok.token_error("index/bucket", have);
1
551433a01cab initial coding
carl
parents:
diff changeset
502 return false;
551433a01cab initial coding
carl
parents:
diff changeset
503 }
551433a01cab initial coding
carl
parents:
diff changeset
504 }
551433a01cab initial coding
carl
parents:
diff changeset
505 if (!tsa(tok, token_semi)) return false;
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
506 PATTERNP patt = new PATTERN(tok, pat, ind, buc);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
507 con.add_pattern(patt);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
508 return true;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
509 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
510
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
511
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
512 ////////////////////////////////////////////////
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
513 //
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
514 bool parse_ignore(TOKEN &tok, CONFIG &dc);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
515 bool parse_ignore(TOKEN &tok, CONFIG &dc) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
516 if (!tsa(tok, token_lbrace)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
517 while (true) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
518 char *have = tok.next();
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
519 if (!have) break;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
520 if (have == token_rbrace) break;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
521 int ipaddr = ip_address(have);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
522 if (ipaddr == 0) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
523 tok.token_error("ip address", have);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
524 return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
525 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
526 if (!tsa(tok, token_slash)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
527 have = tok.next();
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
528 int mask = atoi(have);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
529 if ((mask < 8) || (mask > 32)) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
530 tok.token_error("cidr 8..32 value", have);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
531 return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
532 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
533 if (!tsa(tok, token_semi)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
534 IPPAIR pair;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
535 const int masks[33] = {0xffffffff, // 0
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
536 0x7fffffff, // 1
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
537 0x3fffffff, // 2
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
538 0x1fffffff, // 3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
539 0x0fffffff, // 4
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
540 0x07ffffff, // 5
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
541 0x03ffffff, // 6
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
542 0x01ffffff, // 7
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
543 0x00ffffff, // 8
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
544 0x007fffff, // 9
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
545 0x003fffff, // 10
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
546 0x001fffff, // 11
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
547 0x000fffff, // 12
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
548 0x0007ffff, // 13
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
549 0x0003ffff, // 14
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
550 0x0001ffff, // 15
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
551 0x0000ffff, // 16
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
552 0x00007fff, // 17
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
553 0x00003fff, // 18
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
554 0x00001fff, // 19
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
555 0x00000fff, // 20
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
556 0x000007ff, // 21
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
557 0x000003ff, // 22
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
558 0x000001ff, // 23
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
559 0x000000ff, // 24
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
560 0x0000007f, // 25
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
561 0x0000003f, // 26
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
562 0x0000001f, // 27
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
563 0x0000000f, // 28
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
564 0x00000007, // 29
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
565 0x00000003, // 30
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
566 0x00000001, // 31
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
567 0x00000000}; // 32
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
568 pair.first = ipaddr;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
569 pair.last = ipaddr | masks[mask];
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
570 pair.cidr = mask;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
571 dc.add_pair(pair);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
572 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
573 if (!tsa(tok, token_semi)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
574 return true;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
575 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
576
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
577
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
578 ////////////////////////////////////////////////
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
579 //
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
580 bool parse_syslogconfig(TOKEN &tok, CONFIG &dc);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
581 bool parse_syslogconfig(TOKEN &tok, CONFIG &dc) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
582 char *name = tok.next();
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
583 if (!tsa(tok, token_lbrace)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
584 SYSLOGCONFIGP con = new SYSLOGCONFIG(tok, name);
2
6e88da080f08 initial coding
carl
parents: 1
diff changeset
585 if (con->failed()) {
6e88da080f08 initial coding
carl
parents: 1
diff changeset
586 delete con;
6e88da080f08 initial coding
carl
parents: 1
diff changeset
587 return false;
6e88da080f08 initial coding
carl
parents: 1
diff changeset
588 }
1
551433a01cab initial coding
carl
parents:
diff changeset
589 dc.add_syslogconfig(con);
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
590 while (true) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
591 char *have = tok.next();
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
592 if (!have) break;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
593 if (have == token_rbrace) break;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
594 if (have == token_pattern) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
595 if (!parse_pattern(tok, *con)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
596 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
597 else {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
598 tok.token_error("pattern", have);
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
599 return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
600 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
601 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
602 if (!tsa(tok, token_semi)) return false;
1
551433a01cab initial coding
carl
parents:
diff changeset
603 return true;
551433a01cab initial coding
carl
parents:
diff changeset
604 }
551433a01cab initial coding
carl
parents:
diff changeset
605
551433a01cab initial coding
carl
parents:
diff changeset
606
551433a01cab initial coding
carl
parents:
diff changeset
607 ////////////////////////////////////////////////
551433a01cab initial coding
carl
parents:
diff changeset
608 // parse a config file
551433a01cab initial coding
carl
parents:
diff changeset
609 //
551433a01cab initial coding
carl
parents:
diff changeset
610 bool load_conf(CONFIG &dc, char *fn) {
551433a01cab initial coding
carl
parents:
diff changeset
611 int count = 0;
551433a01cab initial coding
carl
parents:
diff changeset
612 TOKEN tok(fn, &dc.config_files);
551433a01cab initial coding
carl
parents:
diff changeset
613 while (true) {
551433a01cab initial coding
carl
parents:
diff changeset
614 char *have = tok.next();
551433a01cab initial coding
carl
parents:
diff changeset
615 if (!have) break;
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
616 if (have == token_threshold) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
617 have = tok.next();
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
618 dc.set_threshold(atoi(have));
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
619 if (!tsa(tok, token_semi)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
620 }
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
621 else if (have == token_ignore) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
622 if (!parse_ignore(tok, dc)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
623 }
27
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
624 else if (have == token_add) {
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
625 have = tok.next();
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
626 dc.set_add(have);
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
627 if (!tsa(tok, token_semi)) return false;
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
628 }
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
629 else if (have == token_remove) {
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
630 have = tok.next();
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
631 dc.set_remove(have);
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
632 if (!tsa(tok, token_semi)) return false;
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
633 }
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
634 else if (have == token_file) {
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
635 if (!parse_syslogconfig(tok, dc)) return false;
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
636 count++;
1
551433a01cab initial coding
carl
parents:
diff changeset
637 }
551433a01cab initial coding
carl
parents:
diff changeset
638 else {
28
6465d8640489 make add/remove commands configureable
carl
parents: 27
diff changeset
639 tok.token_error("threshold/ignore/add_command/remove_command/file", have);
1
551433a01cab initial coding
carl
parents:
diff changeset
640 return false;
551433a01cab initial coding
carl
parents:
diff changeset
641 }
551433a01cab initial coding
carl
parents:
diff changeset
642 }
551433a01cab initial coding
carl
parents:
diff changeset
643 tok.token_error("load_conf() found %d syslog files in %s", count, fn);
551433a01cab initial coding
carl
parents:
diff changeset
644 return (!dc.syslogconfigs.empty());
551433a01cab initial coding
carl
parents:
diff changeset
645 }
551433a01cab initial coding
carl
parents:
diff changeset
646
551433a01cab initial coding
carl
parents:
diff changeset
647
551433a01cab initial coding
carl
parents:
diff changeset
648 ////////////////////////////////////////////////
551433a01cab initial coding
carl
parents:
diff changeset
649 // init the tokens
551433a01cab initial coding
carl
parents:
diff changeset
650 //
551433a01cab initial coding
carl
parents:
diff changeset
651 void token_init() {
27
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
652 token_add = register_string("add_command");
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
653 token_bucket = register_string("bucket");
1
551433a01cab initial coding
carl
parents:
diff changeset
654 token_file = register_string("file");
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
655 token_ignore = register_string("ignore");
1
551433a01cab initial coding
carl
parents:
diff changeset
656 token_include = register_string("include");
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
657 token_index = register_string("index");
1
551433a01cab initial coding
carl
parents:
diff changeset
658 token_lbrace = register_string("{");
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
659 token_pattern = register_string("pattern");
1
551433a01cab initial coding
carl
parents:
diff changeset
660 token_rbrace = register_string("}");
27
28fec0c67646 make add/remove commands configureable
carl
parents: 24
diff changeset
661 token_remove = register_string("remove_command");
1
551433a01cab initial coding
carl
parents:
diff changeset
662 token_semi = register_string(";");
3
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
663 token_slash = register_string("/");
8fe310e5cd44 initial coding
carl
parents: 2
diff changeset
664 token_threshold = register_string("threshold");
1
551433a01cab initial coding
carl
parents:
diff changeset
665 }