annotate src/dnsbl.cpp @ 211:4db1457cd11a stable-6-0-18

Extend auto-whitelisting when receiving mail even if the auto whitelist is specified in a parent context. Fixes for Solaris from sm-archive.
author Carl Byington <carl@five-ten-sg.com>
date Sat, 22 Mar 2008 11:19:36 -0700
parents 92a5c866bdfa
children 82886d4dd71f
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1 /*
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2
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c7fc218686f5 gpl3, block mail to recipients that cannot reply
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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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6
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7 Based on a sample milter Copyright (c) 2000-2003 Sendmail, Inc. and its
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8 suppliers. Inspired by the DCC by Rhyolite Software
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9
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10 -b port The port used to talk to the dcc interface daemon
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11 -r port The port used to talk to our internal dns resolver processes
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12 -p port The port through which the MTA will connect to this milter.
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13 -t sec The timeout value.
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14 -c Check the config, and print a copy to stdout. Don't start the
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15 milter or do anything with the socket.
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16 -s Stress test by loading and deleting the current config in a loop.
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17 -d level set the debug level
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18 -e f|t Print the results of looking up from address f and to address
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19 t in the current config
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20
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21 */
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22
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23
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24 // from sendmail sample
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25 #include <sys/types.h>
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26 #include <sys/stat.h>
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27 #include <errno.h>
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28 #include <sysexits.h>
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29 #include <unistd.h>
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30
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31 // needed for socket io
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32 #include <sys/ioctl.h>
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33 #include <net/if.h>
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34 #include <arpa/inet.h>
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35 #include <netinet/in.h>
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36 #include <netinet/tcp.h>
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37 #include <netdb.h>
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38 #include <sys/socket.h>
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39 #include <sys/un.h>
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40
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41 // needed for thread
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42 #include <pthread.h>
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43
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44 // needed for std c++ collections
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45 #include <set>
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46 #include <map>
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47 #include <list>
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48
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49 // for the dns resolver
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50 #include <netinet/in.h>
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51 #include <arpa/nameser.h>
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52 #include <resolv.h>
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53
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54 // misc stuff needed here
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55 #include <ctype.h>
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56 #include <syslog.h>
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57 #include <pwd.h>
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58 #include <sys/wait.h> /* header for waitpid() and various macros */
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59 #include <signal.h> /* header for signal functions */
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60
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61 #include "includes.h"
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62
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63 #ifndef HAVE_DAEMON
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64 #include "daemon.h"
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65 #include "daemon.c"
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66 #endif
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67
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68 extern "C" {
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69 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr);
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70 sfsistat mlfi_helo(SMFICTX * ctx, char *helohost);
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71 sfsistat mlfi_envfrom(SMFICTX *ctx, char **argv);
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72 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **argv);
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73 sfsistat mlfi_header(SMFICTX* ctx, char* headerf, char* headerv);
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74 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len);
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75 sfsistat mlfi_eom(SMFICTX *ctx);
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76 sfsistat mlfi_abort(SMFICTX *ctx);
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77 sfsistat mlfi_close(SMFICTX *ctx);
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78 void sig_chld(int signo);
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79 }
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80
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81 int debug_syslog = 0;
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82 bool syslog_opened = false;
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83 bool use_syslog = true; // false to printf
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84 bool loader_run = true; // used to stop the config loader thread
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85 CONFIG *config = NULL; // protected by the config_mutex
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86 int generation = 0; // protected by the config_mutex
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87 const int maxlen = 1000; // used for snprintf buffers
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88
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89 pthread_mutex_t config_mutex;
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90 pthread_mutex_t syslog_mutex;
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91 pthread_mutex_t resolve_mutex;
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92 pthread_mutex_t fd_pool_mutex;
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93 pthread_mutex_t rate_mutex;
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95 std::set<int> fd_pool;
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96 int NULL_SOCKET = -1;
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97 const time_t ERROR_SOCKET_TIME = 60; // number of seconds between attempts to open a socket to the dns resolver process
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98 char *resolver_port = NULL; // unix domain socket to talk to the dns resolver process
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99 int resolver_socket = NULL_SOCKET; // socket used to listen for resolver requests
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100 char *dccifd_port = NULL; // unix domain socket to talk to the dcc interface daemon
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101 time_t last_error_time;
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102 int resolver_sock_count = 0; // protected with fd_pool_mutex
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103 int resolver_pool_size = 0; // protected with fd_pool_mutex
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104 rcpt_rates rcpt_counts; // protected with rate_mutex
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105
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106
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107 struct ns_map {
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108 // all the strings are owned by the keys/values in the ns_host string map
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109 string_map ns_host; // nameserver name -> host name that uses this name server
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110 ns_mapper ns_ip; // nameserver name -> ip address of the name server
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111 ~ns_map();
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112 void add(char *name, char *refer);
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113 };
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115
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116 ns_map::~ns_map() {
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117 for (string_map::iterator i=ns_host.begin(); i!=ns_host.end(); i++) {
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118 char *x = (*i).first;
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119 char *y = (*i).second;
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120 free(x);
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121 free(y);
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122 }
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123 ns_ip.clear();
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124 ns_host.clear();
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125 }
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126
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127
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128 void ns_map::add(char *name, char *refer) {
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129 string_map::iterator i = ns_host.find(name);
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130 if (i != ns_host.end()) return;
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131 char *x = strdup(name);
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132 char *y = strdup(refer);
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133 ns_ip[x] = 0;
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134 ns_host[x] = y;
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135
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136 }
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137
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138 // packed structure to allow a single socket write to dump the
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139 // length and the following answer. The packing attribute is gcc specific.
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140 struct glommer {
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141 int length;
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142 #ifdef NS_PACKETSZ
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143 u_char answer[NS_PACKETSZ*4]; // with a resolver, we return resolver answers
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144 #else
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145 int answer; // without a resolver, we return a single ip4 address, 0 == no answer
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146 #endif
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147 } __attribute__ ((packed));
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148
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149
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150 ////////////////////////////////////////////////
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151 // helper to manipulate recipient counts
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152 //
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153 int incr_rcpt_count(char *user);
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154 int incr_rcpt_count(char *user) {
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155 pthread_mutex_lock(&rate_mutex);
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156 rcpt_rates::iterator i = rcpt_counts.find(user);
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157 int c = 1;
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158 if (i == rcpt_counts.end()) {
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159 user = strdup(user);
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160 rcpt_counts[user] = c;
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161 }
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162 else {
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163 c = ++((*i).second);
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164 }
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165 pthread_mutex_unlock(&rate_mutex);
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166 return c;
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167 }
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168
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169 ////////////////////////////////////////////////
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170 // helper to discard the strings held by a context_map
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171 //
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172 void discard(context_map &cm);
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173 void discard(context_map &cm) {
192
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174 for (context_map::iterator i=cm.begin(); i!=cm.end(); i++) {
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175 char *x = (*i).first;
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176 free(x);
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177 }
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178 cm.clear();
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179 }
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180
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181
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182 ////////////////////////////////////////////////
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183 // helper to register a string in a context_map
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184 //
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185 void register_string(context_map &cm, char *name, CONTEXT *con);
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186 void register_string(context_map &cm, char *name, CONTEXT *con) {
192
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187 context_map::iterator i = cm.find(name);
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188 if (i != cm.end()) return;
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189 char *x = strdup(name);
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190 cm[x] = con;
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191 }
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192
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193
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194 ////////////////////////////////////////////////
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195 // disconnect the fd from the dns resolver process
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196 //
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197 void my_disconnect(int sock, bool decrement = true);
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198 void my_disconnect(int sock, bool decrement) {
192
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199 if (sock != NULL_SOCKET) {
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200 if (decrement) {
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201 pthread_mutex_lock(&fd_pool_mutex);
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202 resolver_sock_count--;
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203 pthread_mutex_unlock(&fd_pool_mutex);
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204 }
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205 shutdown(sock, SHUT_RDWR);
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206 close(sock);
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207 }
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208 }
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209
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210
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211 ////////////////////////////////////////////////
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212 // return fd connected to the dns resolver process
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213 //
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214 int my_connect();
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215 int my_connect() {
192
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216 // if we have had recent errors, don't even try to open the socket
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217 if ((time(NULL) - last_error_time) < ERROR_SOCKET_TIME) return NULL_SOCKET;
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218
192
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219 // nothing recent, maybe this time it will work
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220 int sock = NULL_SOCKET;
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221 sockaddr_un server;
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222 memset(&server, '\0', sizeof(server));
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223 server.sun_family = AF_UNIX;
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224 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
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225 sock = socket(AF_UNIX, SOCK_STREAM, 0);
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226 if (sock != NULL_SOCKET) {
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227 bool rc = (connect(sock, (sockaddr *)&server, sizeof(server)) == 0);
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228 if (!rc) {
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229 my_disconnect(sock, false);
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230 sock = NULL_SOCKET;
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231 last_error_time = time(NULL);
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232 }
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233 }
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234 else last_error_time = time(NULL);
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235 if (sock != NULL_SOCKET) {
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236 pthread_mutex_lock(&fd_pool_mutex);
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237 resolver_sock_count++;
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238 pthread_mutex_unlock(&fd_pool_mutex);
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239 }
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240 return sock;
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241 }
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242
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243
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244 mlfiPriv::mlfiPriv() {
192
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245 pthread_mutex_lock(&config_mutex);
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246 pc = config;
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247 pc->reference_count++;
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248 pthread_mutex_unlock(&config_mutex);
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249 get_fd();
190
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250 ctx = NULL;
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251 eom = false;
192
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252 ip = 0;
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253 helo = NULL;
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254 mailaddr = NULL;
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255 queueid = NULL;
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256 authenticated = NULL;
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257 client_name = NULL;
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258 have_whites = false;
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259 only_whites = true;
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260 want_spamassassin = false;
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261 want_dccgrey = false;
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262 want_dccbulk = false;
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263 is_bulk_precedence = false;
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264 content_context = NULL;
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265 memory = NULL;
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266 scanner = NULL;
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267 content_suffix = NULL;
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268 content_message = NULL;
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269 uribl_suffix = NULL;
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270 uribl_message = NULL;
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271 content_host_ignore = NULL;
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272 assassin = NULL;
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273 dccifd = NULL;
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274 }
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275
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276 mlfiPriv::~mlfiPriv() {
192
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277 return_fd();
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278 pthread_mutex_lock(&config_mutex);
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279 pc->reference_count--;
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280 bool last = (!pc->reference_count) && (pc != config);
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281 pthread_mutex_unlock(&config_mutex);
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282 if (last) delete pc; // free this config, since we were the last reference to it
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283 if (helo) free(helo);
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284 reset(true);
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285 }
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286
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287 void mlfiPriv::reset(bool final) {
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288 while (!delayer.empty()) {
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289 DELAYWHITEP dwp = delayer.front();
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290 delete dwp;
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291 delayer.pop_front();
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292 }
192
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293 if (mailaddr) free(mailaddr);
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294 if (queueid) free(queueid);
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295 if (authenticated) free(authenticated);
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296 if (client_name) free(client_name);
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297 delayer.clear();
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298 discard(env_to);
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299 if (memory) delete memory;
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300 if (scanner) delete scanner;
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301 if (assassin) delete assassin;
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302 if (dccifd) delete dccifd;
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303 if (!final) {
190
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304 ctx = NULL;
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305 eom = false;
192
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306 mailaddr = NULL;
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307 queueid = NULL;
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308 authenticated = NULL;
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309 client_name = NULL;
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310 have_whites = false;
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311 only_whites = true;
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312 want_spamassassin = false;
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313 want_dccgrey = false;
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314 want_dccbulk = false;
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315 is_bulk_precedence = false;
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316 content_context = NULL;
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317 memory = NULL;
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318 scanner = NULL;
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319 content_suffix = NULL;
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320 content_message = NULL;
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321 uribl_suffix = NULL;
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322 uribl_message = NULL;
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323 content_host_ignore = NULL;
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324 assassin = NULL;
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325 dccifd = NULL;
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326 }
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327 }
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328
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329 void mlfiPriv::get_fd() {
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330 err = true;
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331 fd = NULL_SOCKET;
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332 int result = pthread_mutex_lock(&fd_pool_mutex);
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333 if (!result) {
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334 std::set<int>::iterator i;
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335 i = fd_pool.begin();
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336 if (i != fd_pool.end()) {
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337 // have at least one fd in the pool
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338 err = false;
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339 fd = *i;
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340 fd_pool.erase(fd);
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341 resolver_pool_size--;
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342 pthread_mutex_unlock(&fd_pool_mutex);
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343 }
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344 else {
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345 // pool is empty, get a new fd
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346 pthread_mutex_unlock(&fd_pool_mutex);
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347 fd = my_connect();
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348 err = (fd == NULL_SOCKET);
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349 }
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350 }
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351 else {
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352 // cannot lock the pool, just get a new fd
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353 fd = my_connect();
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354 err = (fd == NULL_SOCKET);
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355 }
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356 }
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357
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358 void mlfiPriv::return_fd() {
192
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359 if (err) {
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360 // this fd got a socket error, so close it, rather than returning it to the pool
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361 my_disconnect(fd);
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362 }
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363 else {
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364 int result = pthread_mutex_lock(&fd_pool_mutex);
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365 if (!result) {
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366 if ((resolver_sock_count > resolver_pool_size*5) || (resolver_pool_size < 5)) {
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367 // return the fd to the pool
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368 fd_pool.insert(fd);
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369 resolver_pool_size++;
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370 pthread_mutex_unlock(&fd_pool_mutex);
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371 }
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372 else {
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373 // more than 20% of the open resolver sockets are in the pool, and the
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374 // pool as at least 5 sockets. that is enough, so just close this one.
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375 pthread_mutex_unlock(&fd_pool_mutex);
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376 my_disconnect(fd);
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377 }
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378 }
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379 else {
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380 // could not lock the pool, so just close the fd
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381 my_disconnect(fd);
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382 }
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383 }
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384 }
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diff changeset
385
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386 size_t mlfiPriv::my_write(const char *buf, size_t len) {
192
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387 if (err) return 0;
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388 size_t rs = 0;
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389 while (len) {
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390 size_t ws = write(fd, buf, len);
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391 if (ws > 0) {
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392 rs += ws;
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393 len -= ws;
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394 buf += ws;
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395 }
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396 else {
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397 // peer closed the socket!
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398 rs = 0;
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399 err = true;
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400 break;
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401 }
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402 }
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403 return rs;
94
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404 }
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diff changeset
405
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406 size_t mlfiPriv::my_read(char *buf, size_t len) {
192
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407 if (err) return 0;
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408 size_t rs = 0;
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409 while (len) {
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410 size_t ws = read(fd, buf, len);
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411 if (ws > 0) {
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412 rs += ws;
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413 len -= ws;
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414 buf += ws;
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415 }
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416 else {
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417 // peer closed the socket!
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418 rs = 0;
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419 err = true;
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420 break;
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421 }
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422 }
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423 return rs;
94
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424 }
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425
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426 void mlfiPriv::need_content_filter(char *rcpt, CONTEXT &con) {
192
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427 register_string(env_to, rcpt, &con);
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428 if (!memory) {
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429 // first recipient that needs content filtering sets
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430 // some of the content filtering parameters
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431 memory = new recorder(this, con.get_html_tags(), con.get_content_tlds(), con.get_content_cctlds());
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432 scanner = new url_scanner(memory);
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433 content_suffix = con.get_content_suffix();
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434 content_message = con.get_content_message();
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435 uribl_suffix = con.get_uribl_suffix();
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436 uribl_message = con.get_uribl_message();
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437 content_host_ignore = &con.get_content_host_ignore();
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438 }
94
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439 }
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diff changeset
440
186
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parents: 185
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441
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442 mlfiPriv* fetch_priv_from_ctx(SMFICTX *ctx);
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443 mlfiPriv* fetch_priv_from_ctx(SMFICTX *ctx)
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444 {
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445 mlfiPriv *priv = (struct mlfiPriv *)smfi_getpriv(ctx);
187
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parents: 186
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446 priv->ctx = ctx;
186
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447 return priv;
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448 }
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449 #define MLFIPRIV fetch_priv_from_ctx(ctx)
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450
94
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451
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452
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453 ////////////////////////////////////////////////
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454 // syslog a message
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455 //
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456 void my_syslog(mlfiPriv *priv, char *text) {
192
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457 char buf[maxlen];
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458 if (priv) {
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459 snprintf(buf, sizeof(buf), "%s: %s", priv->queueid, text);
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460 text = buf;
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461 }
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462 if (use_syslog) {
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463 pthread_mutex_lock(&syslog_mutex);
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464 if (!syslog_opened) {
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465 openlog("dnsbl", LOG_PID, LOG_MAIL);
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466 syslog_opened = true;
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467 }
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468 syslog(LOG_NOTICE, "%s", text);
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469 pthread_mutex_unlock(&syslog_mutex);
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470 }
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471 else {
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472 printf("%s \n", text);
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473 }
94
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474 }
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475
163
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476 void my_syslog(mlfiPriv *priv, string text) {
192
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477 if (debug_syslog > 3) {
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478 char buf[maxlen];
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479 strncpy(buf, text.c_str(), sizeof(buf));
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480 buf[maxlen-1] = '\0'; // ensure null termination
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481 my_syslog(priv, buf);
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482 }
163
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483 }
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484
94
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485 void my_syslog(char *text) {
192
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486 my_syslog(NULL, text);
94
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487 }
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diff changeset
488
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489
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490 ////////////////////////////////////////////////
192
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491 // read a resolver request from the socket, process it, and
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492 // write the result back to the socket.
94
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493
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diff changeset
494 void process_resolver_requests(int socket);
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495 void process_resolver_requests(int socket) {
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496 #ifdef NS_MAXDNAME
192
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497 char question[NS_MAXDNAME];
94
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498 #else
192
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499 char question[1000];
94
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500 #endif
192
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501 glommer glom;
94
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502
192
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503 int maxq = sizeof(question);
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504 while (true) {
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505 // read a question
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506 int rs = 0;
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507 while (rs < maxq) {
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508 int ns = read(socket, question+rs, maxq-rs);
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509 if (ns > 0) {
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510 rs += ns;
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511 if (question[rs-1] == '\0') {
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512 // last byte read was the null terminator, we are done
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513 break;
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514 }
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515 }
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516 else {
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517 // peer closed the socket
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518 #ifdef RESOLVER_DEBUG
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519 my_syslog("process_resolver_requests() peer closed socket while reading question");
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520 #endif
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521 shutdown(socket, SHUT_RDWR);
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522 close(socket);
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523 return;
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524 }
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525 }
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526 question[rs-1] = '\0'; // ensure null termination
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527
192
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528 // find the answer
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529 #ifdef NS_PACKETSZ
192
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530 #ifdef RESOLVER_DEBUG
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531 char text[1000];
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532 snprintf(text, sizeof(text), "process_resolver_requests() has a question %s", question);
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533 my_syslog(text);
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534 #endif
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535 if ((_res.options & RES_INIT) == 0) res_init();
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536 _res.retry = 2;
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537 _res.retrans = RES_TIMEOUT;
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538 glom.length = res_search(question, ns_c_in, ns_t_a, glom.answer, sizeof(glom.answer));
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539 if (glom.length < 0) glom.length = 0; // represent all errors as zero length answers
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540 #else
192
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541 glom.length = sizeof(glom.answer);
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542 glom.answer = 0;
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543 struct hostent *host = gethostbyname(question);
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544 if (host && (host->h_addrtype == AF_INET)) {
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545 memcpy(&glom.answer, host->h_addr, sizeof(glom.answer));
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546 }
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547 #endif
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548
192
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549 // write the answer
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550 char *buf = (char *)&glom;
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551 int len = glom.length + sizeof(glom.length);
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552 #ifdef RESOLVER_DEBUG
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553 snprintf(text, sizeof(text), "process_resolver_requests() writing answer length %d for total %d", glom.length, len);
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554 my_syslog(text);
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555 #endif
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556 int ws = 0;
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557 while (len > ws) {
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558 int ns = write(socket, buf+ws, len-ws);
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559 if (ns > 0) {
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560 ws += ns;
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561 }
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562 else {
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563 // peer closed the socket!
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564 #ifdef RESOLVER_DEBUG
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565 my_syslog("process_resolver_requests() peer closed socket while writing answer");
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566 #endif
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567 shutdown(socket, SHUT_RDWR);
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568 close(socket);
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569 return;
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570 }
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571 }
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572 }
94
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573 }
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574
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575
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576 ////////////////////////////////////////////////
192
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577 // ask a dns question and get an A record answer - we don't try
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578 // very hard, just using the default resolver retry settings.
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579 // If we cannot get an answer, we just accept the mail.
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580 //
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581 //
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582 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers);
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583 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers) {
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584 // tell sendmail we are still working
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585 #if _FFR_SMFI_PROGRESS
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586 if (priv.eom) smfi_progress(priv.ctx);
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587 #endif
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588
192
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589 // this part can be done without locking the resolver mutex. Each
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590 // milter thread is talking over its own socket to a separate resolver
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591 // process, which does the actual dns resolution.
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592 if (priv.err) return 0; // cannot ask more questions on this socket.
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593 if (maybe_ip) {
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594 // might be a bare ip address, try this first to avoid dns lookups that may not be needed
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595 in_addr ip;
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596 if (inet_aton(question, &ip)) {
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597 return (int)ip.s_addr;
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598 }
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599 }
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600 int n = strlen(question);
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601 if (question[n-1] == '.') {
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602 priv.my_write(question, n+1); // write the question including the null terminator
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603 }
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604 else {
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605 priv.my_write(question, n); // write the question
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606 priv.my_write(".", 2); // and the fully qualified . terminator and null string terminator
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607 }
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608 glommer glom;
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609 char *buf = (char *)&glom;
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610 priv.my_read(buf, sizeof(glom.length));
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611 buf += sizeof(glom.length);
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612 #ifdef RESOLVER_DEBUG
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613 char text[1000];
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614 snprintf(text, sizeof(text), "dns_interface() wrote question %s and has answer length %d", question, glom.length);
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615 my_syslog(text);
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616 #endif
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617 if ((glom.length < 0) || (glom.length > sizeof(glom.answer))) {
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618 priv.err = true;
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619 return 0; // cannot process overlarge answers
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620 }
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621 priv.my_read(buf, glom.length);
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622
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623 #ifdef NS_PACKETSZ
192
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624 // now we need to lock the resolver mutex to keep the milter threads from
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625 // stepping on each other while parsing the dns answer.
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626 int ret_address = 0;
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627 pthread_mutex_lock(&resolve_mutex);
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628 if (glom.length > 0) {
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629 // parse the answer
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630 ns_msg handle;
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631 ns_rr rr;
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632 if (ns_initparse(glom.answer, glom.length, &handle) == 0) {
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633 // look for ns names
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634 if (nameservers) {
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635 ns_map &ns = *nameservers;
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636 int rrnum = 0;
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637 while (ns_parserr(&handle, ns_s_ns, rrnum++, &rr) == 0) {
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638 if (ns_rr_type(rr) == ns_t_ns) {
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639 char nam[NS_MAXDNAME+1];
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640 char *n = nam;
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641 const u_char *p = ns_rr_rdata(rr);
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642 while (((n-nam) < NS_MAXDNAME) && ((p-glom.answer) < glom.length) && *p) {
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parents: 191
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643 size_t s = *(p++);
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644 if (s > 191) {
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645 // compression pointer
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646 s = (s-192)*256 + *(p++);
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647 if (s >= glom.length) break; // pointer outside bounds of answer
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648 p = glom.answer + s;
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649 s = *(p++);
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650 }
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651 if (s > 0) {
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652 if ((n-nam) >= (NS_MAXDNAME-s)) break; // destination would overflow name buffer
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653 if ((p-glom.answer) >= (glom.length-s)) break; // source outside bounds of answer
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parents: 191
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654 memcpy(n, p, s);
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655 n += s;
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656 p += s;
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657 *(n++) = '.';
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658 }
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659 }
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660 if (n-nam) n--; // remove trailing .
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661 *n = '\0'; // null terminate it
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662 ns.add(nam, question); // ns host to lookup later
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663 }
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664 }
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diff changeset
665 rrnum = 0;
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diff changeset
666 while (ns_parserr(&handle, ns_s_ar, rrnum++, &rr) == 0) {
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667 if (ns_rr_type(rr) == ns_t_a) {
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diff changeset
668 char* nam = (char*)ns_rr_name(rr);
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diff changeset
669 ns_mapper::iterator i = ns.ns_ip.find(nam);
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diff changeset
670 if (i != ns.ns_ip.end()) {
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diff changeset
671 // we want this ip address
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diff changeset
672 int address;
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diff changeset
673 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
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diff changeset
674 ns.ns_ip[nam] = address;
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diff changeset
675 }
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diff changeset
676 }
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diff changeset
677 }
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diff changeset
678 }
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diff changeset
679 int rrnum = 0;
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diff changeset
680 while (ns_parserr(&handle, ns_s_an, rrnum++, &rr) == 0) {
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diff changeset
681 if (ns_rr_type(rr) == ns_t_a) {
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diff changeset
682 int address;
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683 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
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diff changeset
684 ret_address = address;
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diff changeset
685 }
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diff changeset
686 }
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diff changeset
687 }
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diff changeset
688 }
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diff changeset
689 pthread_mutex_unlock(&resolve_mutex);
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690 return ret_address;
94
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691 #else
192
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diff changeset
692 return glom.answer;
94
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diff changeset
693 #endif
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diff changeset
694 }
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carl
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diff changeset
695
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carl
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diff changeset
696
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diff changeset
697 ////////////////////////////////////////////////
192
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diff changeset
698 // check a single dnsbl
94
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diff changeset
699 //
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carl
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diff changeset
700 bool check_single(mlfiPriv &priv, int ip, char *suffix);
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diff changeset
701 bool check_single(mlfiPriv &priv, int ip, char *suffix) {
192
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diff changeset
702 // make a dns question
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703 const u_char *src = (const u_char *)&ip;
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704 if (src[0] == 127) return false; // don't do dns lookups on localhost
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705 if (src[0] == 10) return false; // don't do dns lookups on rfc1918 space
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706 if ((src[0] == 192) && (src[1] == 168)) return false;
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diff changeset
707 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
94
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diff changeset
708 #ifdef NS_MAXDNAME
192
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709 char question[NS_MAXDNAME];
94
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diff changeset
710 #else
192
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diff changeset
711 char question[1000];
94
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diff changeset
712 #endif
192
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713 snprintf(question, sizeof(question), "%u.%u.%u.%u.%s.", src[3], src[2], src[1], src[0], suffix);
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714 // ask the question, if we get an A record it implies a blacklisted ip address
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diff changeset
715 return dns_interface(priv, question, false, NULL);
94
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diff changeset
716 }
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diff changeset
717
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diff changeset
718
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parents: 92
diff changeset
719 ////////////////////////////////////////////////
192
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diff changeset
720 // check a single dnsbl
94
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parents: 92
diff changeset
721 //
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parents: 92
diff changeset
722 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl);
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diff changeset
723 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl) {
192
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724 return check_single(priv, ip, bl.suffix);
94
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parents: 92
diff changeset
725 }
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carl
parents: 92
diff changeset
726
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carl
parents: 92
diff changeset
727
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parents: 92
diff changeset
728 ////////////////////////////////////////////////
192
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diff changeset
729 // check the dnsbls specified for this recipient
94
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parents: 92
diff changeset
730 //
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parents: 92
diff changeset
731 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist);
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parents: 92
diff changeset
732 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist) {
192
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parents: 191
diff changeset
733 for (dnsblp_list::iterator i=dnsbll.begin(); i!=dnsbll.end(); i++) {
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parents: 191
diff changeset
734 DNSBLP dp = *i; // non null by construction
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diff changeset
735 bool st;
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736 map<DNSBLP, bool>::iterator f = priv.checked.find(dp);
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parents: 191
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737 if (f == priv.checked.end()) {
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diff changeset
738 // have not checked this list yet
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739 st = check_single(priv, priv.ip, *dp);
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diff changeset
740 rejectlist = dp;
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diff changeset
741 priv.checked[dp] = st;
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742 }
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diff changeset
743 else {
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744 st = (*f).second;
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745 rejectlist = (*f).first;
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746 }
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747 if (st) return st;
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748 }
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diff changeset
749 return false;
94
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parents: 92
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750 }
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parents: 92
diff changeset
751
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parents: 92
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752
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diff changeset
753 ////////////////////////////////////////////////
192
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754 // lookup the domain name part of a hostname on the uribl
117
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carl
parents: 115
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755 //
192
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756 // if we find part of the hostname on the uribl, return
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757 // true and point found to the part of the hostname that we found
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parents: 191
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758 // as a string registered in hosts.
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759 // otherwise, return false and preserve the value of found.
124
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parents: 123
diff changeset
760 //
178
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parents: 177
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761 bool uriblookup(mlfiPriv &priv, string_set &hosts, char *hostname, char *top, char *&found) ;
d6531c702be3 embedded dcc filtering
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diff changeset
762 bool uriblookup(mlfiPriv &priv, string_set &hosts, char *hostname, char *top, char *&found) {
192
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parents: 191
diff changeset
763 // top is pointer to '.' char at end of base domain, or null for ip address form
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parents: 191
diff changeset
764 // so for hostname of www.fred.mydomain.co.uk
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parents: 191
diff changeset
765 // top points to-----------------------^
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diff changeset
766 // and we end up looking at only mydomain.co.uk, ignoring the www.fred stuff
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parents: 191
diff changeset
767 char buf[maxlen];
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parents: 191
diff changeset
768 if (top) {
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parents: 191
diff changeset
769 // add one more component
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parents: 191
diff changeset
770 *top = '\0';
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diff changeset
771 char *x = strrchr(hostname, '.');
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772 if (x) hostname = x+1;
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parents: 191
diff changeset
773 *top = '.';
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parents: 191
diff changeset
774 }
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diff changeset
775 snprintf(buf, sizeof(buf), "%s.%s.", hostname, priv.uribl_suffix);
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parents: 191
diff changeset
776 if (dns_interface(priv, buf, false, NULL)) {
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parents: 191
diff changeset
777 if (debug_syslog > 2) {
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parents: 191
diff changeset
778 char tmp[maxlen];
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diff changeset
779 snprintf(tmp, sizeof(tmp), "found %s on %s", hostname, priv.uribl_suffix);
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parents: 191
diff changeset
780 my_syslog(tmp);
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parents: 191
diff changeset
781 }
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diff changeset
782 found = register_string(hosts, hostname);
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parents: 191
diff changeset
783 return true;
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parents: 191
diff changeset
784 }
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diff changeset
785 return false;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
786 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
787
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
788
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
789 ////////////////////////////////////////////////
192
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parents: 191
diff changeset
790 // uribl checker
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parents: 191
diff changeset
791 // -------------
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diff changeset
792 // hostname MUST not have a trailing dot
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parents: 191
diff changeset
793 // If tld, two level lookup.
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diff changeset
794 // Else, look up three level domain.
124
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parents: 123
diff changeset
795 //
192
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parents: 191
diff changeset
796 // if we find part of the hostname on the uribl, return
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parents: 191
diff changeset
797 // true and point found to the part of the hostname that we found
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parents: 191
diff changeset
798 // as a string registered in hosts.
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diff changeset
799 // otherwise, return false and preserve the value of found.
124
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carl
parents: 123
diff changeset
800 //
178
d6531c702be3 embedded dcc filtering
carl
parents: 177
diff changeset
801 bool check_uribl(mlfiPriv &priv, string_set &hosts, char *hostname, char *&found) ;
d6531c702be3 embedded dcc filtering
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parents: 177
diff changeset
802 bool check_uribl(mlfiPriv &priv, string_set &hosts, char *hostname, char *&found) {
192
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parents: 191
diff changeset
803 in_addr ip;
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parents: 191
diff changeset
804 if (inet_aton(hostname, &ip)) {
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parents: 191
diff changeset
805 const u_char *src = (const u_char *)&ip.s_addr;
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parents: 191
diff changeset
806 if (src[0] == 127) return false; // don't do dns lookups on localhost
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parents: 191
diff changeset
807 if (src[0] == 10) return false; // don't do dns lookups on rfc1918 space
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parents: 191
diff changeset
808 if ((src[0] == 192) && (src[1] == 168)) return false;
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parents: 191
diff changeset
809 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
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carl
parents: 191
diff changeset
810 char adr[sizeof "255.255.255.255 "];
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parents: 191
diff changeset
811 snprintf(adr, sizeof(adr), "%u.%u.%u.%u", src[3], src[2], src[1], src[0]);
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carl
parents: 191
diff changeset
812 // cannot use inet_ntop here since we want the octets reversed.
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parents: 191
diff changeset
813 return (uriblookup(priv, hosts, adr, NULL, found));
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parents: 191
diff changeset
814 }
117
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carl
parents: 115
diff changeset
815
192
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parents: 191
diff changeset
816 char *top, *top2, *top3;
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parents: 191
diff changeset
817 top = strrchr(hostname, '.');
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parents: 191
diff changeset
818 if (top) {
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parents: 191
diff changeset
819 *top = '\0';
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parents: 191
diff changeset
820 top2 = strrchr(hostname, '.');
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carl
parents: 191
diff changeset
821 *top = '.';
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
822
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
823 if (top2) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
824 string_set::iterator i = priv.memory->get_cctlds()->find(top2+1);
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carl
parents: 191
diff changeset
825 string_set::iterator x = priv.memory->get_cctlds()->end();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
826 // if we have a 2-level-cctld, just look at top three levels of the name
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
827 if (i != x) return uriblookup(priv, hosts, hostname, top2, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
828
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
829 *top2 = '\0';
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
830 top3 = strrchr(hostname, '.');
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
831 *top2 = '.';
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
832
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
833 // if we have more than 3 levels in the name, look at the top three levels of the name
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
834 if (top3 && uriblookup(priv, hosts, hostname, top2, found)) return true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
835 // if that was not found, fall thru to looking at the top two levels
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carl
parents: 191
diff changeset
836 }
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carl
parents: 191
diff changeset
837 // look at the top two levels of the name
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carl
parents: 191
diff changeset
838 return uriblookup(priv, hosts, hostname, top, found);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
839 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
840 return false;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
841 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
842
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
843
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
844 ////////////////////////////////////////////////
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
845 // check the hosts from the body against the content filter and uribl dnsbls
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
846 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
847 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
848 bool check_hosts(mlfiPriv &priv, bool random, int limit, char *&msg, char *&host, int &ip, char *&found);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
849 bool check_hosts(mlfiPriv &priv, bool random, int limit, char *&msg, char *&host, int &ip, char *&found) {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
850 found = NULL; // normally ip address style
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parents: 191
diff changeset
851 if (!priv.content_suffix && !priv.uribl_suffix) return false; // nothing to check
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
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parents: 191
diff changeset
852 CONFIG &dc = *priv.pc;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
853 string_set &hosts = priv.memory->get_hosts();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
854 string_set &ignore = *priv.content_host_ignore;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
855
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
856 int count = 0;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
857 int cnt = hosts.size(); // number of hosts we could look at
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carl
parents: 191
diff changeset
858 int_set ips;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
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parents: 191
diff changeset
859 ns_map nameservers;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
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parents: 191
diff changeset
860 for (string_set::iterator i=hosts.begin(); i!=hosts.end(); i++) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
861 host = *i; // a reference into hosts, which will live until this smtp transaction is closed
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
862
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
863 // don't bother looking up hosts on the ignore list
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
864 string_set::iterator j = ignore.find(host);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
865 if (j != ignore.end()) continue;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
866
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
867 // try to only look at limit/cnt fraction of the available cnt host names in random mode
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carl
parents: 191
diff changeset
868 if ((cnt > limit) && (limit > 0) && random) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
869 int r = rand() % cnt;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
870 if (r >= limit) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
871 if (debug_syslog > 2) {
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carl
parents: 191
diff changeset
872 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
873 snprintf(buf, sizeof(buf), "host %s skipped", host);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
874 my_syslog(&priv, buf);
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carl
parents: 191
diff changeset
875 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
876 continue;
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carl
parents: 191
diff changeset
877 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
878 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
879 count++;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
880 ip = dns_interface(priv, host, true, &nameservers);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
881 if (debug_syslog > 2) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
882 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
883 if (ip) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
884 char adr[sizeof "255.255.255.255 "];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
885 adr[0] = '\0';
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
886 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
887 snprintf(buf, sizeof(buf), "host %s found at %s", host, adr);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
888 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
889 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
890 snprintf(buf, sizeof(buf), "host %s not found", host);
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carl
parents: 191
diff changeset
891 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
892 my_syslog(&priv, buf);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
893 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
894 if (ip) {
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carl
parents: 191
diff changeset
895 int_set::iterator i = ips.find(ip);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
896 if (i == ips.end()) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
897 // we haven't looked this up yet
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
898 ips.insert(ip);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
899 // check dnsbl style list
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
900 if (priv.content_suffix && check_single(priv, ip, priv.content_suffix)) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
901 msg = priv.content_message;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
902 return true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
903 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
904 // Check uribl & surbl style list
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
905 if (priv.uribl_suffix && check_uribl(priv, hosts, host, found)) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
906 msg = priv.uribl_message;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
907 return true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
908 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
909 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
910 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
911 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
912 limit *= 4; // allow average of 3 ns per host name
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
913 for (ns_mapper::iterator i=nameservers.ns_ip.begin(); i!=nameservers.ns_ip.end(); i++) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
914 count++;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
915 if ((count > limit) && (limit > 0)) return false; // too many name servers to check them all
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
916 host = (*i).first; // a transient reference that needs to be replaced before we return it
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
917 ip = (*i).second;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
918 if (!ip) ip = dns_interface(priv, host, false, NULL);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
919 if (debug_syslog > 2) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
920 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
921 if (ip) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
922 char adr[sizeof "255.255.255.255 "];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
923 adr[0] = '\0';
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
924 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
925 snprintf(buf, sizeof(buf), "ns %s found at %s", host, adr);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
926 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
927 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
928 snprintf(buf, sizeof(buf), "ns %s not found", host);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
929 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
930 my_syslog(&priv, buf);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
931 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
932 if (ip) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
933 int_set::iterator i = ips.find(ip);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
934 if (i == ips.end()) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
935 ips.insert(ip);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
936 if (check_single(priv, ip, priv.content_suffix)) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
937 msg = priv.content_message;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
938 string_map::iterator j = nameservers.ns_host.find(host);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
939 if (j != nameservers.ns_host.end()) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
940 char *refer = (*j).second;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
941 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
942 snprintf(buf, sizeof(buf), "%s with nameserver %s", refer, host);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
943 host = register_string(hosts, buf); // put a copy into hosts, and return that reference
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
944 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
945 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
946 host = register_string(hosts, host); // put a copy into hosts, and return that reference
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
947 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
948 return true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
949 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
950 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
951 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
952 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
953 return false;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
954 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
955
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
956
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
957 ////////////////////////////////////////////////
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
958 //
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
959 // this email address is passed in from sendmail, and will normally be
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
960 // enclosed in <>. I think older versions of sendmail supplied the <>
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
961 // wrapper if the mail client did not, but the current version does not do
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
962 // that. So the <> wrapper is now optional. It may have mixed case, just
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
963 // as the mail client sent it. We dup the string and convert the duplicate
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
964 // to lower case. Some clients enclose the entire address in single quotes,
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
965 // so we strip those as well.
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
966 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
967 char *to_lower_string(char *email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
968 char *to_lower_string(char *email) {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
969 int n = strlen(email);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
970 if (email[0] == '<') {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
971 // assume it also ends with >
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
972 n -= 2;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
973 if (n < 1) return strdup(email); // return "<>"
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
974 email++;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
975 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
976 if ((email[0] == '\'') && (email[n-1] == '\'') && (n > 2)) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
977 n -= 2;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
978 email++;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
979 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
980 char *key = strdup(email);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
981 key[n] = '\0';
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
982 for (int i=0; i<n; i++) key[i] = tolower(key[i]);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
983 return key;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
984 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
985
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
986
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
987 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
988 // start of sendmail milter interfaces
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
989 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
990 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
991 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
992 // allocate some private memory
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
993 mlfiPriv *priv = new mlfiPriv;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
994 if (hostaddr->sa_family == AF_INET) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
995 priv->ip = ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
996 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
997 // save the private data
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
998 smfi_setpriv(ctx, (void*)priv);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
999
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1000 // continue processing
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1001 return SMFIS_CONTINUE;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1002 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1003
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1004 sfsistat mlfi_helo(SMFICTX * ctx, char *helohost)
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1005 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1006 mlfiPriv &priv = *MLFIPRIV;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1007 priv.helo = strdup(helohost);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1008 return SMFIS_CONTINUE;
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1009 }
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1010
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1011 sfsistat mlfi_envfrom(SMFICTX *ctx, char **from)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1012 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1013 mlfiPriv &priv = *MLFIPRIV;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1014 priv.mailaddr = to_lower_string(from[0]);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1015 priv.queueid = strdup(smfi_getsymval(ctx, "i"));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1016 priv.authenticated = smfi_getsymval(ctx, "{auth_authen}");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1017 priv.client_name = smfi_getsymval(ctx, "_");
191
2a67d31099c3 fix null pointer dereference from missing HELO command
carl
parents: 190
diff changeset
1018 if (!priv.helo) priv.helo = strdup("unknown");
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1019 if (priv.authenticated) priv.authenticated = strdup(priv.authenticated);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1020 if (priv.client_name) priv.client_name = strdup(priv.client_name);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1021 if (spamc != spamc_empty) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1022 priv.assassin = new SpamAssassin(&priv, priv.ip, priv.helo, priv.mailaddr, priv.queueid);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1023 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1024 if (dccifd_port) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1025 priv.dccifd = new DccInterface(dccifd_port, &priv, priv.ip, priv.helo, priv.mailaddr);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1026 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1027 return SMFIS_CONTINUE;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1028 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1029
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1030 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **rcpt)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1031 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1032 DNSBLP rejectlist = NULL; // list that caused the reject
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1033 mlfiPriv &priv = *MLFIPRIV;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1034 CONFIG &dc = *priv.pc;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1035 char *rcptaddr = rcpt[0];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1036 char *loto = to_lower_string(rcptaddr);
174
da0c41b9f672 don't whitelist addresses with embedded spaces
carl
parents: 173
diff changeset
1037
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1038 // some version of sendmail allowed rcpt to:<> and passed it thru to the milters
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1039 if (strcmp(loto, "<>") == 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1040 smfi_setreply(ctx, "550", "5.7.1", "bogus recipient");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1041 return SMFIS_REJECT;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1042 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1043 // priv.mailaddr sending original message to loto
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1044 CONTEXT &con = *(dc.find_context(loto)->find_context(priv.mailaddr));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1045 VERIFYP ver = con.find_verify(loto);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1046 char *fromvalue = con.find_from(priv.mailaddr, true);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1047 // tell spam assassin and dccifd about this recipient
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1048 if (priv.assassin) priv.assassin->mlfi_envrcpt(ctx, loto);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1049 if (priv.dccifd) priv.dccifd->mlfi_envrcpt(ctx, loto, con.get_grey() && !priv.authenticated);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1050 // loto sending a reply back to priv.mailaddr
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1051 CONTEXT &con2 = *(dc.find_context(priv.mailaddr)->find_context(loto));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1052 char *replyvalue = con2.find_from(loto);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1053 if (debug_syslog > 1) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1054 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1055 char msg[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1056 snprintf(msg, sizeof(msg), "from <%s> to <%s> using context %s state %s reply state %s", priv.mailaddr, loto, con.get_full_name(buf,maxlen), fromvalue, replyvalue);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1057 my_syslog(&priv, msg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1058 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1059 free(loto);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1060 status st;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1061 if (replyvalue == token_black) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1062 smfi_setreply(ctx, "550", "5.7.1", "recipient can not reply due to blacklisting");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1063 return SMFIS_REJECT;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1064 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1065 if (priv.authenticated) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1066 int c = incr_rcpt_count(priv.authenticated);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1067 int l = dc.default_context->find_rate(priv.authenticated);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1068 if (debug_syslog > 1) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1069 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1070 char msg[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1071 snprintf(msg, sizeof(msg), "authenticated id %s (%d recipients, %d limit)", priv.authenticated, c, l);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1072 my_syslog(&priv, msg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1073 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1074 if (c > l) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1075 smfi_setreply(ctx, "550", "5.7.1", "recipient rate limit exceeded");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1076 return SMFIS_REJECT;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1077 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1078 st = white;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1079 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1080 else if (fromvalue == token_black) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1081 st = black;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1082 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1083 else if (fromvalue == token_white) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1084 st = white;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1085 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1086 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1087 // check the dns based lists
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1088 st = (check_dnsbl(priv, con.get_dnsbl_list(), rejectlist)) ? reject : oksofar;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1089 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1090 if (st == reject) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1091 // reject the recipient based on some dnsbl
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1092 char adr[sizeof "255.255.255.255 "];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1093 adr[0] = '\0';
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1094 inet_ntop(AF_INET, (const u_char *)&priv.ip, adr, sizeof(adr));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1095 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1096 snprintf(buf, sizeof(buf), rejectlist->message, adr, adr);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1097 smfi_setreply(ctx, "550", "5.7.1", buf);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1098 return SMFIS_REJECT;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1099 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1100 if (st == oksofar) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1101 char *msg = con.generic_match(priv.client_name);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1102 if (msg) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1103 // reject the recipient based on generic reverse dns
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1104 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1105 snprintf(buf, sizeof(buf), msg, priv.client_name);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1106 smfi_setreply(ctx, "550", "5.7.1", buf);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1107 return SMFIS_REJECT;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1108 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1109 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1110 if (st == black) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1111 // reject the recipient based on blacklisting either from or to
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1112 smfi_setreply(ctx, "550", "5.7.1", "no such user");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1113 return SMFIS_REJECT;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1114 }
203
92a5c866bdfa Verify from/to pairs even if they might be explicitly whitelisted.
Carl Byington <carl@five-ten-sg.com>
parents: 194
diff changeset
1115 if (ver) {
92a5c866bdfa Verify from/to pairs even if they might be explicitly whitelisted.
Carl Byington <carl@five-ten-sg.com>
parents: 194
diff changeset
1116 // try to verify this from/to pair of addresses even if it might be explicitly whitelisted
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1117 char *loto = to_lower_string(rcptaddr);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1118 bool rc = ver->ok(priv.mailaddr, loto);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1119 free(loto);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1120 if (!rc) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1121 smfi_setreply(ctx, "550", "5.7.1", "no such user");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1122 return SMFIS_REJECT;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1123 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1124 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1125 // we will accept the recipient, but add an auto-whitelist entry
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1126 // if needed to ensure we can accept replies
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1127 loto = to_lower_string(rcptaddr);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1128 WHITELISTERP w = con2.find_autowhite(loto, priv.mailaddr);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1129 // check if local part is too big
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carl
parents: 191
diff changeset
1130 const int max_local_size = 30;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1131 char *p = strchr(loto, '@');
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1132 int len = (p) ? p-loto : max_local_size;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1133 if (len >= max_local_size) w = NULL; // too big, pretend we don't have a whitelister
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1134 // record it if we have a whitelister
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1135 if (w) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1136 DELAYWHITEP dwp = new DELAYWHITE(loto, w, &con2);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1137 priv.delayer.push_back(dwp);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1138 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1139 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1140 free(loto);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1141 }
179
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
1142
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1143 // accept the recipient
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1144 if (!con.get_content_filtering()) st = white;
179
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
1145
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1146 if (st == oksofar) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1147 // remember first content filtering context
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1148 if (con.get_content_filtering()) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1149 if (!priv.content_context) priv.content_context = &con;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1150 else if (con.get_require() && (priv.content_context != &con)) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1151 smfi_setreply(ctx, "452", "4.2.1", "incompatible filtering contexts");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1152 return SMFIS_TEMPFAIL;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1153 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1154 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1155 // remember the non-whites
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1156 priv.need_content_filter(rcptaddr, con);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1157 priv.only_whites = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1158 priv.want_spamassassin |= (priv.assassin) && // have spam assassin available and
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1159 (con.get_spamassassin_limit() != 0); // want to use it with a non-zero score
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1160 priv.want_dccgrey |= (priv.dccifd) && // have dcc interface and
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1161 (con.get_grey()); // want to use it for greylisting
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1162 priv.want_dccbulk |= (priv.dccifd) && // have dcc interface and
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1163 (con.get_bulk() != 0); // want to use it for bulk detection
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1164 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1165 if (st == white) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1166 priv.have_whites = true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1167 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1168 return SMFIS_CONTINUE;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1169 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1170
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1171 sfsistat mlfi_header(SMFICTX* ctx, char* headerf, char* headerv)
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1172 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1173 mlfiPriv &priv = *MLFIPRIV;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1174 // detect precedence:bulk for avoiding autowhitelisting
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1175 if ((strcasecmp(headerf, "precedence") == 0) &&
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1176 (strcasecmp(headerv, "bulk") == 0)) priv.is_bulk_precedence = true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1177 // other headers are only needed for content filtering
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1178 if (priv.authenticated) return SMFIS_CONTINUE;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1179 if (priv.only_whites) return SMFIS_CONTINUE;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1180 if (priv.want_spamassassin) priv.assassin->mlfi_header(headerf, headerv);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1181 if (priv.want_dccgrey || priv.want_dccbulk) priv.dccifd->mlfi_header(ctx, headerf, headerv);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1182 return SMFIS_CONTINUE;
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1183 }
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1184
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1185 sfsistat mlfi_eoh(SMFICTX* ctx)
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1186 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1187 mlfiPriv &priv = *MLFIPRIV;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1188 // delayed autowhitelisting
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1189 while (!priv.delayer.empty()) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1190 DELAYWHITEP dwp = priv.delayer.front();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1191 if (!priv.is_bulk_precedence) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1192 char *loto = dwp->get_loto();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1193 WHITELISTERP w = dwp->get_w();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1194 CONTEXTP con2 = dwp->get_con();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1195 if (debug_syslog > 1) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1196 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1197 char msg[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1198 snprintf(msg, sizeof(msg), "whitelist reply from <%s> in context %s", loto, con2->get_full_name(buf,maxlen));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1199 my_syslog(&priv, msg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1200 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1201 w->sent(loto); // don't free it, the whitelister takes ownership of the string
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1202 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1203 delete dwp;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1204 priv.delayer.pop_front();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1205 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1206 // content filtering
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1207 if (priv.authenticated) return SMFIS_CONTINUE;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1208 if (priv.only_whites) return SMFIS_CONTINUE;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1209 if (priv.want_spamassassin) priv.assassin->mlfi_eoh();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1210 if (priv.want_dccgrey || priv.want_dccbulk) priv.dccifd->mlfi_eoh();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1211 return SMFIS_CONTINUE;
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1212 }
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1213
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1214 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1215 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1216 mlfiPriv &priv = *MLFIPRIV;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1217 if (priv.authenticated) return SMFIS_CONTINUE;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1218 if (priv.only_whites) return SMFIS_CONTINUE;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1219 if (priv.want_spamassassin) priv.assassin->mlfi_body(data, len);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1220 if (priv.want_dccgrey || priv.want_dccbulk) priv.dccifd->mlfi_body(data, len);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1221 priv.scanner->scan(data, len);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1222 return SMFIS_CONTINUE;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1223 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1224
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1225 sfsistat mlfi_eom(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1226 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1227 sfsistat rc;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1228 mlfiPriv &priv = *MLFIPRIV;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1229 CONFIG &dc = *priv.pc;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1230 char *host = NULL;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1231 int ip;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1232 status st;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1233 // process end of message
190
004b855c6c1f fix null pointer dereference from missing HELO command
carl
parents: 188
diff changeset
1234 priv.eom = true;
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1235 if (priv.authenticated || priv.only_whites) rc = SMFIS_CONTINUE;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1236 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1237 // assert env_to not empty, it contains the
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1238 // non-whitelisted folks that want content filtering
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1239 int score = (priv.want_spamassassin) ? priv.assassin->mlfi_eom() : 0;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1240 bool grey = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1241 int bulk = 0;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1242 if (priv.want_dccgrey || priv.want_dccbulk) priv.dccifd->mlfi_eom(grey, bulk);
178
d6531c702be3 embedded dcc filtering
carl
parents: 177
diff changeset
1243
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1244 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1245 string msg;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1246 string_set alive;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1247 bool random = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1248 int limit = 0;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1249 for (context_map::iterator i=priv.env_to.begin(); i!=priv.env_to.end(); i++) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1250 char *rcpt = (*i).first;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1251 CONTEXT &con = *((*i).second);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1252 if (!con.acceptable_content(*priv.memory, score, bulk, msg)) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1253 // bad html tags or excessive hosts or
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1254 // high spam assassin score or dcc bulk threshold exceedeed
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1255 smfi_delrcpt(ctx, rcpt);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1256 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1257 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1258 alive.insert(rcpt);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1259 random |= con.get_host_random();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1260 limit = max(limit, con.get_host_limit());
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1261 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1262 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1263 bool rejecting = alive.empty(); // if alive is empty, we must have set msg above in acceptable_content()
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1264 if (!rejecting) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1265 char *fmt, *found;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1266 if (check_hosts(priv, random, limit, fmt, host, ip, found)) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1267 if (found) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1268 // uribl style
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1269 snprintf(buf, sizeof(buf), fmt, host, found);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1270 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1271 else {
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carl
parents: 191
diff changeset
1272 // dnsbl style
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carl
parents: 191
diff changeset
1273 char adr[sizeof "255.255.255.255 "];
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carl
parents: 191
diff changeset
1274 adr[0] = '\0';
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carl
parents: 191
diff changeset
1275 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
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carl
parents: 191
diff changeset
1276 snprintf(buf, sizeof(buf), fmt, host, adr);
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carl
parents: 191
diff changeset
1277 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1278 msg = string(buf);
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carl
parents: 191
diff changeset
1279 rejecting = true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1280 }
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carl
parents: 191
diff changeset
1281 }
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carl
parents: 191
diff changeset
1282 if (!rejecting) {
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carl
parents: 191
diff changeset
1283 if (priv.want_dccgrey && grey) {
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carl
parents: 191
diff changeset
1284 smfi_setreply(ctx, "452", "4.2.1", "temporary greylist embargoed");
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carl
parents: 191
diff changeset
1285 rc = SMFIS_TEMPFAIL;
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carl
parents: 191
diff changeset
1286 }
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carl
parents: 191
diff changeset
1287 else rc = SMFIS_CONTINUE;
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carl
parents: 191
diff changeset
1288 }
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carl
parents: 191
diff changeset
1289 else if (!priv.have_whites) {
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carl
parents: 191
diff changeset
1290 // can reject the entire message
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carl
parents: 191
diff changeset
1291 snprintf(buf, sizeof(buf), "%s", msg.c_str());
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parents: 191
diff changeset
1292 smfi_setreply(ctx, "550", "5.7.1", buf);
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carl
parents: 191
diff changeset
1293 rc = SMFIS_REJECT;
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carl
parents: 191
diff changeset
1294 }
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carl
parents: 191
diff changeset
1295 else {
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carl
parents: 191
diff changeset
1296 // need to accept it but remove the recipients that don't want it
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carl
parents: 191
diff changeset
1297 for (string_set::iterator i=alive.begin(); i!=alive.end(); i++) {
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carl
parents: 191
diff changeset
1298 char *rcpt = *i;
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carl
parents: 191
diff changeset
1299 smfi_delrcpt(ctx, rcpt);
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carl
parents: 191
diff changeset
1300 }
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diff changeset
1301 rc = SMFIS_CONTINUE;
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carl
parents: 191
diff changeset
1302 }
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carl
parents: 191
diff changeset
1303 }
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carl
parents: 191
diff changeset
1304 // reset for a new message on the same connection
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diff changeset
1305 mlfi_abort(ctx);
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parents: 191
diff changeset
1306 return rc;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1307 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1308
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1309 sfsistat mlfi_abort(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1310 {
192
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carl
parents: 191
diff changeset
1311 mlfiPriv &priv = *MLFIPRIV;
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parents: 191
diff changeset
1312 priv.reset();
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parents: 191
diff changeset
1313 return SMFIS_CONTINUE;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1314 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1315
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1316 sfsistat mlfi_close(SMFICTX *ctx)
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carl
parents: 92
diff changeset
1317 {
192
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parents: 191
diff changeset
1318 mlfiPriv *priv = MLFIPRIV;
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carl
parents: 191
diff changeset
1319 if (!priv) return SMFIS_CONTINUE;
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carl
parents: 191
diff changeset
1320 delete priv;
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parents: 191
diff changeset
1321 smfi_setpriv(ctx, NULL);
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parents: 191
diff changeset
1322 return SMFIS_CONTINUE;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1323 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1324
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1325 struct smfiDesc smfilter =
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1326 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1327 "DNSBL", // filter name
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carl
parents: 191
diff changeset
1328 SMFI_VERSION, // version code -- do not change
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carl
parents: 191
diff changeset
1329 SMFIF_DELRCPT, // flags
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carl
parents: 191
diff changeset
1330 mlfi_connect, // connection info filter
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carl
parents: 191
diff changeset
1331 mlfi_helo, // SMTP HELO command filter
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carl
parents: 191
diff changeset
1332 mlfi_envfrom, // envelope sender filter
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carl
parents: 191
diff changeset
1333 mlfi_envrcpt, // envelope recipient filter
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carl
parents: 191
diff changeset
1334 mlfi_header, // header filter
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carl
parents: 191
diff changeset
1335 mlfi_eoh, // end of header
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carl
parents: 191
diff changeset
1336 mlfi_body, // body block filter
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carl
parents: 191
diff changeset
1337 mlfi_eom, // end of message
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carl
parents: 191
diff changeset
1338 mlfi_abort, // message aborted
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carl
parents: 191
diff changeset
1339 mlfi_close, // connection cleanup
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1340 };
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1341
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1342
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1343 ////////////////////////////////////////////////
192
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carl
parents: 191
diff changeset
1344 // reload the config
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1345 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1346 CONFIG* new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1347 CONFIG* new_conf() {
192
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carl
parents: 191
diff changeset
1348 CONFIG *newc = new CONFIG;
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carl
parents: 191
diff changeset
1349 pthread_mutex_lock(&config_mutex);
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carl
parents: 191
diff changeset
1350 newc->generation = generation++;
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carl
parents: 191
diff changeset
1351 pthread_mutex_unlock(&config_mutex);
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carl
parents: 191
diff changeset
1352 if (debug_syslog) {
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carl
parents: 191
diff changeset
1353 char buf[maxlen];
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parents: 191
diff changeset
1354 snprintf(buf, sizeof(buf), "loading configuration generation %d", newc->generation);
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carl
parents: 191
diff changeset
1355 my_syslog(buf);
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carl
parents: 191
diff changeset
1356 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1357 if (load_conf(*newc, "dnsbl.conf")) {
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carl
parents: 191
diff changeset
1358 newc->load_time = time(NULL);
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carl
parents: 191
diff changeset
1359 return newc;
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carl
parents: 191
diff changeset
1360 }
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parents: 191
diff changeset
1361 delete newc;
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parents: 191
diff changeset
1362 return NULL;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1363 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1364
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1365
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1366 ////////////////////////////////////////////////
192
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carl
parents: 191
diff changeset
1367 // thread to watch the old config files for changes
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carl
parents: 191
diff changeset
1368 // and reload when needed.
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carl
parents: 191
diff changeset
1369 // we also clear the SMTP AUTH recipient counts hourly
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1370 //
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1371 extern "C" {void* config_loader(void *arg);}
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1372 void* config_loader(void *arg) {
192
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carl
parents: 191
diff changeset
1373 int loop = 0;
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carl
parents: 191
diff changeset
1374 while (loader_run) {
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carl
parents: 191
diff changeset
1375 sleep(180); // look for modifications every 3 minutes
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carl
parents: 191
diff changeset
1376 if (!loader_run) break;
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carl
parents: 191
diff changeset
1377 loop++;
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carl
parents: 191
diff changeset
1378 if (loop == 20) {
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carl
parents: 191
diff changeset
1379 // three minutes thru each loop, 20 loops per hour
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carl
parents: 191
diff changeset
1380 // clear the recipient counts
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carl
parents: 191
diff changeset
1381 pthread_mutex_lock(&rate_mutex);
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carl
parents: 191
diff changeset
1382 for (rcpt_rates::iterator i=rcpt_counts.begin(); i!=rcpt_counts.end(); i++) {
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carl
parents: 191
diff changeset
1383 (*i).second = 0;
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carl
parents: 191
diff changeset
1384 }
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carl
parents: 191
diff changeset
1385 pthread_mutex_unlock(&rate_mutex);
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carl
parents: 191
diff changeset
1386 loop = 0;
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carl
parents: 191
diff changeset
1387 }
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carl
parents: 191
diff changeset
1388 CONFIG &dc = *config;
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carl
parents: 191
diff changeset
1389 time_t then = dc.load_time;
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carl
parents: 191
diff changeset
1390 struct stat st;
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carl
parents: 191
diff changeset
1391 bool reload = false;
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carl
parents: 191
diff changeset
1392 for (string_set::iterator i=dc.config_files.begin(); i!=dc.config_files.end(); i++) {
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carl
parents: 191
diff changeset
1393 char *fn = *i;
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carl
parents: 191
diff changeset
1394 if (stat(fn, &st)) reload = true; // file disappeared
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carl
parents: 191
diff changeset
1395 else if (st.st_mtime > then) reload = true; // file modified
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carl
parents: 191
diff changeset
1396 if (reload) break;
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carl
parents: 191
diff changeset
1397 }
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carl
parents: 191
diff changeset
1398 if (reload) {
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carl
parents: 191
diff changeset
1399 CONFIG *newc = new_conf();
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carl
parents: 191
diff changeset
1400 if (newc) {
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carl
parents: 191
diff changeset
1401 // replace the global config pointer
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carl
parents: 191
diff changeset
1402 pthread_mutex_lock(&config_mutex);
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carl
parents: 191
diff changeset
1403 CONFIG *pc = config;
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carl
parents: 191
diff changeset
1404 bool last = pc && (!pc->reference_count);
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carl
parents: 191
diff changeset
1405 config = newc;
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parents: 191
diff changeset
1406 pthread_mutex_unlock(&config_mutex);
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carl
parents: 191
diff changeset
1407 if (last) delete pc; // there were no references to this config
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carl
parents: 191
diff changeset
1408 }
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carl
parents: 191
diff changeset
1409 else {
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carl
parents: 191
diff changeset
1410 // failed to load new config
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carl
parents: 191
diff changeset
1411 my_syslog("failed to load new configuration");
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carl
parents: 191
diff changeset
1412 system("echo 'failed to load new dnsbl configuration from /etc/dnsbl' | mail -s 'error in /etc/dnsbl configuration' root");
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carl
parents: 191
diff changeset
1413 // update the load time on the current config to prevent complaining every 3 minutes
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carl
parents: 191
diff changeset
1414 dc.load_time = time(NULL);
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carl
parents: 191
diff changeset
1415 }
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carl
parents: 191
diff changeset
1416 }
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carl
parents: 191
diff changeset
1417 }
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carl
parents: 191
diff changeset
1418 return NULL;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1419 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1420
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1421
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1422 void usage(char *prog);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1423 void usage(char *prog)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1424 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1425 fprintf(stderr, "Usage: %s [-d [level]] [-c] [-s] [-e from|to] [-b dccifd-addr] -r port -p sm-sock-addr [-t timeout]\n", prog);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1426 fprintf(stderr, "where dccifd_addr is for the connection to dccifd\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1427 fprintf(stderr, " and should be local-domain-socket-file-name\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1428 fprintf(stderr, "where port is for the connection to our own dns resolver processes\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1429 fprintf(stderr, " and should be local-domain-socket-file-name\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1430 fprintf(stderr, "where sm-sock-addr is for the connection to sendmail\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1431 fprintf(stderr, " and should be one of\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1432 fprintf(stderr, " inet:port@ip-address\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1433 fprintf(stderr, " local:local-domain-socket-file-name\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1434 fprintf(stderr, "-c will load and dump the config to stdout\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1435 fprintf(stderr, "-s will stress test the config loading code by repeating the load/free cycle\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1436 fprintf(stderr, " in an infinte loop.\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1437 fprintf(stderr, "-d will set the syslog message level, currently 0 to 3\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1438 fprintf(stderr, "-e will print the results of looking up the from and to addresses in the\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1439 fprintf(stderr, " current config. The | character is used to separate the from and to\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1440 fprintf(stderr, " addresses in the argument to the -e switch\n");
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1441 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1442
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1443
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1444
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1445 void setup_socket(char *sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1446 void setup_socket(char *sock) {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1447 unlink(sock);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1448 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1449
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1450
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1451 /*
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1452 * The signal handler function -- only gets called when a SIGCHLD
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1453 * is received, ie when a child terminates
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1454 */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1455 void sig_chld(int signo)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1456 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1457 int status;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1458 /* Wait for any child without blocking */
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1459 while (waitpid(-1, &status, WNOHANG) > 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1460 // ignore child exit status, we only do this to cleanup zombies
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1461 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1462 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1463
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1464
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1465 int main(int argc, char**argv)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1466 {
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1467 token_init();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1468 bool check = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1469 bool stress = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1470 bool setconn = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1471 bool setreso = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1472 char *email = NULL;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1473 int c;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1474 const char *args = "b:r:p:t:e:d:chs";
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1475 extern char *optarg;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1476
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1477 // Process command line options
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1478 while ((c = getopt(argc, argv, args)) != -1) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1479 switch (c) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1480 case 'b':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1481 if (optarg == NULL || *optarg == '\0') {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1482 fprintf(stderr, "Illegal dccifd socket: %s\n", optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1483 exit(EX_USAGE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1484 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1485 dccifd_port = strdup(optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1486 break;
177
a4d313c2460b start embedded dcc filtering
carl
parents: 174
diff changeset
1487
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1488 case 'r':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1489 if (optarg == NULL || *optarg == '\0') {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1490 fprintf(stderr, "Illegal resolver socket: %s\n", optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1491 exit(EX_USAGE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1492 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1493 resolver_port = strdup(optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1494 setup_socket(resolver_port);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1495 setreso = true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1496 break;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1497
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1498 case 'p':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1499 if (optarg == NULL || *optarg == '\0') {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1500 fprintf(stderr, "Illegal sendmail socket: %s\n", optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1501 exit(EX_USAGE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1502 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1503 if (smfi_setconn(optarg) == MI_FAILURE) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1504 fprintf(stderr, "smfi_setconn failed\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1505 exit(EX_SOFTWARE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1506 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1507 if (strncasecmp(optarg, "unix:", 5) == 0) setup_socket(optarg + 5);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1508 else if (strncasecmp(optarg, "local:", 6) == 0) setup_socket(optarg + 6);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1509 setconn = true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1510 break;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1511
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1512 case 't':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1513 if (optarg == NULL || *optarg == '\0') {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1514 fprintf(stderr, "Illegal timeout: %s\n", optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1515 exit(EX_USAGE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1516 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1517 if (smfi_settimeout(atoi(optarg)) == MI_FAILURE) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1518 fprintf(stderr, "smfi_settimeout failed\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1519 exit(EX_SOFTWARE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1520 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1521 break;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1522
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1523 case 'e':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1524 if (email) free(email);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1525 email = strdup(optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1526 break;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1527
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1528 case 'c':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1529 check = true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1530 break;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1531
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1532 case 's':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1533 stress = true;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1534 break;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1535
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1536 case 'd':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1537 if (optarg == NULL || *optarg == '\0') debug_syslog = 1;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1538 else debug_syslog = atoi(optarg);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1539 break;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1540
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1541 case 'h':
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1542 default:
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1543 usage(argv[0]);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1544 exit(EX_USAGE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1545 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1546 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1547
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1548 if (check) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1549 use_syslog = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1550 debug_syslog = 10;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1551 CONFIG *conf = new_conf();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1552 if (conf) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1553 conf->dump();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1554 delete conf;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1555 clear_strings(); // for valgrind checking
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1556 return 0;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1557 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1558 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1559 return 1; // config failed to load
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1560 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1561 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1562
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1563 if (stress) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1564 fprintf(stdout, "stress testing\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1565 while (1) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1566 for (int i=0; i<10; i++) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1567 CONFIG *conf = new_conf();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1568 if (conf) delete conf;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1569 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1570 fprintf(stdout, ".");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1571 fflush(stdout);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1572 sleep(1);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1573 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1574 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1575
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1576 if (email) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1577 char *x = strchr(email, '|');
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1578 if (x) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1579 *x = '\0';
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1580 char *from = strdup(email);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1581 char *to = strdup(x+1);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1582 use_syslog = false;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1583 CONFIG *conf = new_conf();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1584 if (conf) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1585 CONTEXTP con = conf->find_context(to);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1586 char buf[maxlen];
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1587 fprintf(stdout, "envelope to <%s> finds context %s\n", to, con->get_full_name(buf,maxlen));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1588 CONTEXTP fc = con->find_context(from);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1589 fprintf(stdout, "envelope from <%s> finds context %s\n", from, fc->get_full_name(buf,maxlen));
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1590 char *st = fc->find_from(from);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1591 fprintf(stdout, "envelope from <%s> finds status %s\n", from, st);
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carl
parents: 191
diff changeset
1592 delete conf;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1593 }
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carl
parents: 191
diff changeset
1594 }
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carl
parents: 191
diff changeset
1595 return 0;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1596 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1597
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1598 if (!setconn) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1599 fprintf(stderr, "%s: Missing required -p argument\n", argv[0]);
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carl
parents: 191
diff changeset
1600 usage(argv[0]);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1601 exit(EX_USAGE);
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carl
parents: 191
diff changeset
1602 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1603
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1604 if (!setreso) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1605 fprintf(stderr, "%s: Missing required -r argument\n", argv[0]);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1606 usage(argv[0]);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1607 exit(EX_USAGE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1608 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1609
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1610 if (smfi_register(smfilter) == MI_FAILURE) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1611 fprintf(stderr, "smfi_register failed\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1612 exit(EX_UNAVAILABLE);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1613 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1614
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1615 // switch to background mode
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carl
parents: 191
diff changeset
1616 if (daemon(1,0) < 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1617 fprintf(stderr, "daemon() call failed\n");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1618 exit(EX_UNAVAILABLE);
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carl
parents: 191
diff changeset
1619 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1620
192
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carl
parents: 191
diff changeset
1621 // write the pid
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carl
parents: 191
diff changeset
1622 const char *pidpath = "/var/run/dnsbl.pid";
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carl
parents: 191
diff changeset
1623 unlink(pidpath);
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carl
parents: 191
diff changeset
1624 FILE *f = fopen(pidpath, "w");
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carl
parents: 191
diff changeset
1625 if (f) {
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1626 #ifdef linux
192
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carl
parents: 191
diff changeset
1627 // from a comment in the DCC source code:
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carl
parents: 191
diff changeset
1628 // Linux threads are broken. Signals given the
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1629 // original process are delivered to only the
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1630 // thread that happens to have that PID. The
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1631 // sendmail libmilter thread that needs to hear
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1632 // SIGINT and other signals does not, and that breaks
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1633 // scripts that need to stop milters.
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1634 // However, signaling the process group works.
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carl
parents: 191
diff changeset
1635 fprintf(f, "-%d\n", (u_int)getpgrp());
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1636 #else
192
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carl
parents: 191
diff changeset
1637 fprintf(f, "%d\n", (u_int)getpid());
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1638 #endif
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
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parents: 191
diff changeset
1639 fclose(f);
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carl
parents: 191
diff changeset
1640 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1641
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1642 // initialize the thread sync objects
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1643 pthread_mutex_init(&config_mutex, 0);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1644 pthread_mutex_init(&syslog_mutex, 0);
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carl
parents: 191
diff changeset
1645 pthread_mutex_init(&resolve_mutex, 0);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1646 pthread_mutex_init(&fd_pool_mutex, 0);
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carl
parents: 191
diff changeset
1647 pthread_mutex_init(&verifier_mutex, 0);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1648 pthread_mutex_init(&whitelister_mutex, 0);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1649
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1650 // drop root privs
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carl
parents: 191
diff changeset
1651 struct passwd *pw = getpwnam("dnsbl");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1652 if (pw) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1653 if (setgid(pw->pw_gid) == -1) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1654 my_syslog("failed to switch to group dnsbl");
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carl
parents: 191
diff changeset
1655 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1656 if (setuid(pw->pw_uid) == -1) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1657 my_syslog("failed to switch to user dnsbl");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1658 }
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carl
parents: 191
diff changeset
1659 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1660
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1661 // load the initial config
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carl
parents: 191
diff changeset
1662 config = new_conf();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1663 if (!config) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1664 my_syslog("failed to load initial configuration, quitting");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1665 exit(1);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1666 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1667
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1668 // fork off the resolver listener process
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1669 pid_t child = fork();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1670 if (child < 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1671 my_syslog("failed to create resolver listener process");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1672 exit(0);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1673 }
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carl
parents: 191
diff changeset
1674 if (child == 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1675 // we are the child - dns resolver listener process
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carl
parents: 191
diff changeset
1676 resolver_socket = socket(AF_UNIX, SOCK_STREAM, 0);
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carl
parents: 191
diff changeset
1677 if (resolver_socket < 0) {
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carl
parents: 191
diff changeset
1678 my_syslog("child failed to create resolver socket");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1679 exit(0); // failed
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carl
parents: 191
diff changeset
1680 }
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carl
parents: 191
diff changeset
1681 sockaddr_un server;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1682 memset(&server, '\0', sizeof(server));
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carl
parents: 191
diff changeset
1683 server.sun_family = AF_UNIX;
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carl
parents: 191
diff changeset
1684 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
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carl
parents: 191
diff changeset
1685 //try to bind the address to the socket.
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carl
parents: 191
diff changeset
1686 if (bind(resolver_socket, (sockaddr *)&server, sizeof(server)) < 0) {
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carl
parents: 191
diff changeset
1687 // bind failed
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carl
parents: 191
diff changeset
1688 shutdown(resolver_socket, SHUT_RDWR);
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carl
parents: 191
diff changeset
1689 close(resolver_socket);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1690 my_syslog("child failed to bind resolver socket");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1691 exit(0); // failed
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carl
parents: 191
diff changeset
1692 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1693 //listen on the socket.
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carl
parents: 191
diff changeset
1694 if (listen(resolver_socket, 10) < 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1695 // listen failed
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carl
parents: 191
diff changeset
1696 shutdown(resolver_socket, SHUT_RDWR);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1697 close(resolver_socket);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1698 my_syslog("child failed to listen to resolver socket");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1699 exit(0); // failed
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carl
parents: 191
diff changeset
1700 }
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carl
parents: 191
diff changeset
1701 // setup sigchld handler to prevent zombies
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carl
parents: 191
diff changeset
1702 struct sigaction act;
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carl
parents: 191
diff changeset
1703 act.sa_handler = sig_chld; // Assign sig_chld as our SIGCHLD handler
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carl
parents: 191
diff changeset
1704 sigemptyset(&act.sa_mask); // We don't want to block any other signals in this example
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carl
parents: 191
diff changeset
1705 act.sa_flags = SA_NOCLDSTOP; // only want children that have terminated
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carl
parents: 191
diff changeset
1706 if (sigaction(SIGCHLD, &act, NULL) < 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1707 my_syslog("child failed to setup SIGCHLD handler");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1708 exit(0); // failed
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carl
parents: 191
diff changeset
1709 }
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carl
parents: 191
diff changeset
1710 while (true) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1711 sockaddr_un client;
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1712 socklen_t clientlen = sizeof(client);
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carl
parents: 191
diff changeset
1713 int s = accept(resolver_socket, (sockaddr *)&client, &clientlen);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1714 if (s > 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1715 // accept worked, it did not get cancelled before we could accept it
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carl
parents: 191
diff changeset
1716 // fork off a process to handle this connection
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carl
parents: 191
diff changeset
1717 int newchild = fork();
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1718 if (newchild == 0) {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1719 // this is the worker process
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1720 // child does not need the listening socket
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carl
parents: 191
diff changeset
1721 close(resolver_socket);
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carl
parents: 191
diff changeset
1722 process_resolver_requests(s);
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carl
parents: 191
diff changeset
1723 exit(0);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1724 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1725 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1726 // this is the parent
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1727 // parent does not need the accepted socket
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1728 close(s);
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1729 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1730 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1731 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1732 exit(0); // make sure we don't fall thru.
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1733 }
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1734 else {
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1735 sleep(2); // allow child to get started
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1736 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1737
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1738 // only create threads after the fork() in daemon
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carl
parents: 191
diff changeset
1739 pthread_t tid;
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carl
parents: 191
diff changeset
1740 if (pthread_create(&tid, 0, config_loader, 0))
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1741 my_syslog("failed to create config loader thread");
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1742 if (pthread_detach(tid))
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1743 my_syslog("failed to detach config loader thread");
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1744
192
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1745 if (pthread_create(&tid, 0, verify_closer, 0))
8f4a9a37d4d9 delay autowhitelisting to avoid out of office reply bots
carl
parents: 191
diff changeset
1746 my_syslog("failed to create verify closer thread");
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parents: 191
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1747 if (pthread_detach(tid))
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parents: 191
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1748 my_syslog("failed to detach verify closer thread");
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1749
192
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1750 if (pthread_create(&tid, 0, whitelister_writer, 0))
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parents: 191
diff changeset
1751 my_syslog("failed to create autowhite writer thread");
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parents: 191
diff changeset
1752 if (pthread_detach(tid))
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parents: 191
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1753 my_syslog("failed to detach autowhite writer thread");
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1754
192
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1755 time_t starting = time(NULL);
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1756 int rc = smfi_main();
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1757 if ((rc != MI_SUCCESS) && (time(NULL) > starting+5*60)) {
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parents: 191
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1758 my_syslog("trying to restart after smfi_main()");
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parents: 191
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1759 loader_run = false; // eventually the config loader thread will terminate
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1760 execvp(argv[0], argv);
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1761 }
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1762 exit((rc == MI_SUCCESS) ? 0 : EX_UNAVAILABLE);
94
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parents: 92
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1763 }
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parents: 92
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1764