annotate src/dnsbl.cpp @ 159:ea7c57a4a2d1 stable-6-01

add auto whitelisting
author carl
date Sun, 08 Jul 2007 11:57:51 -0700
parents a220bfb9211f
children c4bce911c276
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
152
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 -r port The port used to talk to our internal dns resolver processes
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11 -p port The port through which the MTA will connect to this milter.
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12 -t sec The timeout value.
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13 -c Check the config, and print a copy to stdout. Don't start the
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14 milter or do anything with the socket.
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15 -s Stress test by loading and deleting the current config in a loop.
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16 -d increase debug level
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17 -e f|t Print the results of looking up from address f and to address
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18 t in the current config
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19
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20 */
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21
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22
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23 // from sendmail sample
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24 #include <sys/types.h>
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25 #include <sys/stat.h>
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26 #include <errno.h>
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27 #include <sysexits.h>
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28 #include <unistd.h>
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29
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30 // needed for socket io
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31 #include <sys/ioctl.h>
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32 #include <net/if.h>
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33 #include <arpa/inet.h>
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34 #include <netinet/in.h>
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35 #include <netinet/tcp.h>
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36 #include <netdb.h>
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37 #include <sys/socket.h>
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38 #include <sys/un.h>
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39
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40 // needed for thread
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41 #include <pthread.h>
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42
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43 // needed for std c++ collections
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44 #include <set>
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45 #include <map>
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46 #include <list>
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47
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48 // for the dns resolver
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49 #include <netinet/in.h>
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50 #include <arpa/nameser.h>
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51 #include <resolv.h>
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52
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53 // misc stuff needed here
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54 #include <ctype.h>
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55 #include <syslog.h>
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56 #include <pwd.h>
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57 #include <sys/wait.h> /* header for waitpid() and various macros */
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58 #include <signal.h> /* header for signal functions */
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59
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60 #include "includes.h"
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61
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62 static char* dnsbl_version="$Id$";
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63
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64
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65 extern "C" {
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66 #include <libmilter/mfapi.h>
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67 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr);
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68 sfsistat mlfi_envfrom(SMFICTX *ctx, char **argv);
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69 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **argv);
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70 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len);
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71 sfsistat mlfi_eom(SMFICTX *ctx);
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72 sfsistat mlfi_abort(SMFICTX *ctx);
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73 sfsistat mlfi_close(SMFICTX *ctx);
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74 void sig_chld(int signo);
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75 }
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76
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77 int debug_syslog = 0;
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78 bool syslog_opened = false;
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79 bool use_syslog = true; // false to printf
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80 bool loader_run = true; // used to stop the config loader thread
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81 CONFIG *config = NULL; // protected by the config_mutex
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82 int generation = 0; // protected by the config_mutex
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83 const int maxlen = 1000; // used for snprintf buffers
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84
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85 pthread_mutex_t config_mutex;
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86 pthread_mutex_t syslog_mutex;
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87 pthread_mutex_t resolve_mutex;
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88 pthread_mutex_t fd_pool_mutex;
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89 pthread_mutex_t rate_mutex;
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90
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91 std::set<int> fd_pool;
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92 int NULL_SOCKET = -1;
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93 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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94 char *resolver_port = NULL; // unix domain socket to talk to the dns resolver process
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95 int resolver_socket = NULL_SOCKET; // socket used to listen for resolver requests
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96 time_t last_error_time;
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97 int resolver_sock_count = 0; // protected with fd_pool_mutex
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98 int resolver_pool_size = 0; // protected with fd_pool_mutex
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99 rcpt_rates rcpt_counts; // protected with rate_mutex
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100
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101
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102 struct ns_map {
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103 // all the strings are owned by the keys/values in the ns_host string map
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104 string_map ns_host; // nameserver name -> host name that uses this name server
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105 ns_mapper ns_ip; // nameserver name -> ip address of the name server
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106 ~ns_map();
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107 void add(char *name, char *refer);
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108 };
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109
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110
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111 ns_map::~ns_map() {
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112 for (string_map::iterator i=ns_host.begin(); i!=ns_host.end(); i++) {
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113 char *x = (*i).first;
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114 char *y = (*i).second;
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115 free(x);
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116 free(y);
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117 }
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118 ns_ip.clear();
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119 ns_host.clear();
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120 }
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121
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122
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123 void ns_map::add(char *name, char *refer) {
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124 string_map::iterator i = ns_host.find(name);
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125 if (i != ns_host.end()) return;
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126 char *x = strdup(name);
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127 char *y = strdup(refer);
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128 ns_ip[x] = 0;
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129 ns_host[x] = y;
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130
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131 }
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132
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133 // packed structure to allow a single socket write to dump the
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134 // length and the following answer. The packing attribute is gcc specific.
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135 struct glommer {
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136 int length;
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137 #ifdef NS_PACKETSZ
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138 u_char answer[NS_PACKETSZ*4]; // with a resolver, we return resolver answers
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139 #else
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140 int answer; // without a resolver, we return a single ip4 address, 0 == no answer
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141 #endif
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142 } __attribute__ ((packed));
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143
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144
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145 ////////////////////////////////////////////////
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146 // helper to manipulate recipient counts
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147 //
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148 int incr_rcpt_count(char *user);
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149 int incr_rcpt_count(char *user) {
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150 pthread_mutex_lock(&rate_mutex);
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151 rcpt_rates::iterator i = rcpt_counts.find(user);
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152 int c = 1;
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153 if (i == rcpt_counts.end()) {
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154 user = strdup(user);
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155 rcpt_counts[user] = c;
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156 }
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157 else {
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158 c = ++((*i).second);
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159 }
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160 pthread_mutex_unlock(&rate_mutex);
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161 return c;
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162 }
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163
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164 ////////////////////////////////////////////////
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165 // helper to discard the strings held by a context_map
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166 //
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167 void discard(context_map &cm);
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168 void discard(context_map &cm) {
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169 for (context_map::iterator i=cm.begin(); i!=cm.end(); i++) {
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170 char *x = (*i).first;
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171 free(x);
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172 }
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173 cm.clear();
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174 }
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175
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176
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177 ////////////////////////////////////////////////
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178 // helper to register a string in a context_map
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179 //
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180 void register_string(context_map &cm, char *name, CONTEXT *con);
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181 void register_string(context_map &cm, char *name, CONTEXT *con) {
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182 context_map::iterator i = cm.find(name);
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183 if (i != cm.end()) return;
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184 char *x = strdup(name);
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185 cm[x] = con;
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186 }
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187
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188
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189 ////////////////////////////////////////////////
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190 // disconnect the fd from the dns resolver process
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191 //
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192 void my_disconnect(int sock, bool decrement = true);
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193 void my_disconnect(int sock, bool decrement) {
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194 if (sock != NULL_SOCKET) {
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195 if (decrement) {
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196 pthread_mutex_lock(&fd_pool_mutex);
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197 resolver_sock_count--;
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198 pthread_mutex_unlock(&fd_pool_mutex);
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199 }
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200 shutdown(sock, SHUT_RDWR);
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201 close(sock);
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202 }
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203 }
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204
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205
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206 ////////////////////////////////////////////////
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207 // return fd connected to the dns resolver process
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208 //
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209 int my_connect();
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210 int my_connect() {
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211 // if we have had recent errors, don't even try to open the socket
129
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212 if ((time(NULL) - last_error_time) < ERROR_SOCKET_TIME) return NULL_SOCKET;
94
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213
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214 // nothing recent, maybe this time it will work
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215 int sock = NULL_SOCKET;
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216 sockaddr_un server;
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217 memset(&server, '\0', sizeof(server));
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218 server.sun_family = AF_UNIX;
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219 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
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220 sock = socket(AF_UNIX, SOCK_STREAM, 0);
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221 if (sock != NULL_SOCKET) {
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222 bool rc = (connect(sock, (sockaddr *)&server, sizeof(server)) == 0);
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223 if (!rc) {
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224 my_disconnect(sock, false);
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225 sock = NULL_SOCKET;
129
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226 last_error_time = time(NULL);
94
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227 }
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228 }
129
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229 else last_error_time = time(NULL);
94
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230 if (sock != NULL_SOCKET) {
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231 pthread_mutex_lock(&fd_pool_mutex);
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232 resolver_sock_count++;
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233 pthread_mutex_unlock(&fd_pool_mutex);
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234 }
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235 return sock;
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236 }
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237
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238
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239 mlfiPriv::mlfiPriv() {
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240 pthread_mutex_lock(&config_mutex);
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241 pc = config;
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242 pc->reference_count++;
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243 pthread_mutex_unlock(&config_mutex);
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244 get_fd();
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245 ip = 0;
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246 mailaddr = NULL;
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247 queueid = NULL;
136
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248 authenticated = NULL;
94
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249 have_whites = false;
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250 only_whites = true;
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251 memory = NULL;
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252 scanner = NULL;
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253 content_suffix = NULL;
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254 content_message = NULL;
119
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255 uribl_suffix = NULL;
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256 uribl_message = NULL;
94
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257 content_host_ignore = NULL;
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258 }
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259
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260 mlfiPriv::~mlfiPriv() {
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261 return_fd();
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262 pthread_mutex_lock(&config_mutex);
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diff changeset
263 pc->reference_count--;
146
7278c9766e26 free old configs when last reference goes away
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264 bool last = (!pc->reference_count) && (pc != config);
94
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265 pthread_mutex_unlock(&config_mutex);
146
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266 if (last) delete pc; // free this config, since we were the last reference to it
94
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267 reset(true);
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268 }
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269
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270 void mlfiPriv::reset(bool final) {
136
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271 if (mailaddr) free(mailaddr);
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272 if (queueid) free(queueid);
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273 if (authenticated) free(authenticated);
94
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274 discard(env_to);
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275 if (memory) delete memory;
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276 if (scanner) delete scanner;
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277 if (!final) {
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278 mailaddr = NULL;
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279 queueid = NULL;
136
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diff changeset
280 authenticated = NULL;
94
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281 have_whites = false;
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282 only_whites = true;
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283 memory = NULL;
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284 scanner = NULL;
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285 content_suffix = NULL;
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286 content_message = NULL;
119
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287 uribl_suffix = NULL;
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diff changeset
288 uribl_message = NULL;
94
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289 content_host_ignore = NULL;
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290 }
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291 }
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292
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293 void mlfiPriv::get_fd() {
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294 err = true;
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295 fd = NULL_SOCKET;
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296 int result = pthread_mutex_lock(&fd_pool_mutex);
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297 if (!result) {
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298 std::set<int>::iterator i;
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299 i = fd_pool.begin();
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300 if (i != fd_pool.end()) {
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301 // have at least one fd in the pool
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302 err = false;
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303 fd = *i;
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304 fd_pool.erase(fd);
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305 resolver_pool_size--;
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306 pthread_mutex_unlock(&fd_pool_mutex);
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307 }
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308 else {
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309 // pool is empty, get a new fd
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310 pthread_mutex_unlock(&fd_pool_mutex);
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311 fd = my_connect();
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312 err = (fd == NULL_SOCKET);
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313 }
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314 }
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diff changeset
315 else {
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diff changeset
316 // cannot lock the pool, just get a new fd
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317 fd = my_connect();
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318 err = (fd == NULL_SOCKET);
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319 }
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320 }
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321
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322 void mlfiPriv::return_fd() {
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323 if (err) {
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diff changeset
324 // this fd got a socket error, so close it, rather than returning it to the pool
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diff changeset
325 my_disconnect(fd);
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326 }
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diff changeset
327 else {
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328 int result = pthread_mutex_lock(&fd_pool_mutex);
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diff changeset
329 if (!result) {
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330 if ((resolver_sock_count > resolver_pool_size*5) || (resolver_pool_size < 5)) {
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diff changeset
331 // return the fd to the pool
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diff changeset
332 fd_pool.insert(fd);
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333 resolver_pool_size++;
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diff changeset
334 pthread_mutex_unlock(&fd_pool_mutex);
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diff changeset
335 }
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diff changeset
336 else {
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diff changeset
337 // more than 20% of the open resolver sockets are in the pool, and the
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diff changeset
338 // pool as at least 5 sockets. that is enough, so just close this one.
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diff changeset
339 pthread_mutex_unlock(&fd_pool_mutex);
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diff changeset
340 my_disconnect(fd);
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diff changeset
341 }
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diff changeset
342 }
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diff changeset
343 else {
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diff changeset
344 // could not lock the pool, so just close the fd
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diff changeset
345 my_disconnect(fd);
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diff changeset
346 }
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diff changeset
347 }
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diff changeset
348 }
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349
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diff changeset
350 int mlfiPriv::my_write(char *buf, int len) {
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351 if (err) return 0;
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diff changeset
352 int rs = 0;
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diff changeset
353 while (len) {
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diff changeset
354 int ws = write(fd, buf, len);
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diff changeset
355 if (ws > 0) {
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diff changeset
356 rs += ws;
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diff changeset
357 len -= ws;
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diff changeset
358 buf += ws;
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diff changeset
359 }
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diff changeset
360 else {
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diff changeset
361 // peer closed the socket!
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diff changeset
362 rs = 0;
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diff changeset
363 err = true;
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diff changeset
364 break;
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diff changeset
365 }
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diff changeset
366 }
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diff changeset
367 return rs;
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diff changeset
368 }
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diff changeset
369
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diff changeset
370 int mlfiPriv::my_read(char *buf, int len) {
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diff changeset
371 if (err) return 0;
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diff changeset
372 int rs = 0;
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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parents: 132
diff changeset
373 while (len) {
94
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diff changeset
374 int ws = read(fd, buf, len);
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diff changeset
375 if (ws > 0) {
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diff changeset
376 rs += ws;
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diff changeset
377 len -= ws;
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diff changeset
378 buf += ws;
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diff changeset
379 }
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diff changeset
380 else {
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diff changeset
381 // peer closed the socket!
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diff changeset
382 rs = 0;
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diff changeset
383 err = true;
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diff changeset
384 break;
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diff changeset
385 }
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diff changeset
386 }
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diff changeset
387 return rs;
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diff changeset
388 }
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diff changeset
389
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diff changeset
390 void mlfiPriv::need_content_filter(char *rcpt, CONTEXT &con) {
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parents: 92
diff changeset
391 register_string(env_to, rcpt, &con);
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diff changeset
392 if (!memory) {
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diff changeset
393 // first recipient that needs content filtering sets all
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diff changeset
394 // the content filtering parameters
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
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diff changeset
395 memory = new recorder(this, con.get_html_tags(), con.get_content_tlds(), con.get_content_cctlds());
94
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parents: 92
diff changeset
396 scanner = new url_scanner(memory);
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diff changeset
397 content_suffix = con.get_content_suffix();
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diff changeset
398 content_message = con.get_content_message();
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
399 uribl_suffix = con.get_uribl_suffix();
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
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parents: 117
diff changeset
400 uribl_message = con.get_uribl_message();
94
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parents: 92
diff changeset
401 content_host_ignore = &con.get_content_host_ignore();
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parents: 92
diff changeset
402 }
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parents: 92
diff changeset
403 }
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parents: 92
diff changeset
404
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parents: 92
diff changeset
405 #define MLFIPRIV ((struct mlfiPriv *) smfi_getpriv(ctx))
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
406
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parents: 92
diff changeset
407
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parents: 92
diff changeset
408 ////////////////////////////////////////////////
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parents: 92
diff changeset
409 // syslog a message
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parents: 92
diff changeset
410 //
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parents: 92
diff changeset
411 void my_syslog(mlfiPriv *priv, char *text) {
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parents: 92
diff changeset
412 char buf[maxlen];
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parents: 92
diff changeset
413 if (priv) {
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parents: 92
diff changeset
414 snprintf(buf, sizeof(buf), "%s: %s", priv->queueid, text);
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parents: 92
diff changeset
415 text = buf;
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parents: 92
diff changeset
416 }
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parents: 92
diff changeset
417 if (use_syslog) {
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parents: 92
diff changeset
418 pthread_mutex_lock(&syslog_mutex);
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parents: 92
diff changeset
419 if (!syslog_opened) {
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parents: 92
diff changeset
420 openlog("dnsbl", LOG_PID, LOG_MAIL);
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parents: 92
diff changeset
421 syslog_opened = true;
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parents: 92
diff changeset
422 }
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parents: 92
diff changeset
423 syslog(LOG_NOTICE, "%s", text);
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parents: 92
diff changeset
424 pthread_mutex_unlock(&syslog_mutex);
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parents: 92
diff changeset
425 }
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parents: 92
diff changeset
426 else {
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parents: 92
diff changeset
427 printf("%s \n", text);
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parents: 92
diff changeset
428 }
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parents: 92
diff changeset
429 }
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parents: 92
diff changeset
430
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parents: 92
diff changeset
431 void my_syslog(char *text) {
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parents: 92
diff changeset
432 my_syslog(NULL, text);
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parents: 92
diff changeset
433 }
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parents: 92
diff changeset
434
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parents: 92
diff changeset
435
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parents: 92
diff changeset
436 ////////////////////////////////////////////////
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parents: 92
diff changeset
437 // read a resolver request from the socket, process it, and
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parents: 92
diff changeset
438 // write the result back to the socket.
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parents: 92
diff changeset
439
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parents: 92
diff changeset
440 void process_resolver_requests(int socket);
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parents: 92
diff changeset
441 void process_resolver_requests(int socket) {
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parents: 92
diff changeset
442 #ifdef NS_MAXDNAME
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parents: 92
diff changeset
443 char question[NS_MAXDNAME];
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parents: 92
diff changeset
444 #else
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parents: 92
diff changeset
445 char question[1000];
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parents: 92
diff changeset
446 #endif
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parents: 92
diff changeset
447 glommer glom;
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parents: 92
diff changeset
448
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parents: 92
diff changeset
449 int maxq = sizeof(question);
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parents: 92
diff changeset
450 while (true) {
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parents: 92
diff changeset
451 // read a question
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parents: 92
diff changeset
452 int rs = 0;
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parents: 92
diff changeset
453 while (rs < maxq) {
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parents: 92
diff changeset
454 int ns = read(socket, question+rs, maxq-rs);
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parents: 92
diff changeset
455 if (ns > 0) {
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parents: 92
diff changeset
456 rs += ns;
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parents: 92
diff changeset
457 if (question[rs-1] == '\0') {
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parents: 92
diff changeset
458 // last byte read was the null terminator, we are done
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parents: 92
diff changeset
459 break;
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parents: 92
diff changeset
460 }
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parents: 92
diff changeset
461 }
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parents: 92
diff changeset
462 else {
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parents: 92
diff changeset
463 // peer closed the socket
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parents: 92
diff changeset
464 #ifdef RESOLVER_DEBUG
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parents: 92
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465 my_syslog("process_resolver_requests() peer closed socket while reading question");
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parents: 92
diff changeset
466 #endif
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diff changeset
467 shutdown(socket, SHUT_RDWR);
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468 close(socket);
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469 return;
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parents: 92
diff changeset
470 }
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parents: 92
diff changeset
471 }
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parents: 92
diff changeset
472 question[rs-1] = '\0'; // ensure null termination
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parents: 92
diff changeset
473
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parents: 92
diff changeset
474 // find the answer
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parents: 92
diff changeset
475 #ifdef NS_PACKETSZ
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parents: 92
diff changeset
476 #ifdef RESOLVER_DEBUG
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parents: 92
diff changeset
477 char text[1000];
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parents: 92
diff changeset
478 snprintf(text, sizeof(text), "process_resolver_requests() has a question %s", question);
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parents: 92
diff changeset
479 my_syslog(text);
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parents: 92
diff changeset
480 #endif
150
a23ef169d322 limit dns resolver timeouts and retry interval
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parents: 148
diff changeset
481 if ((_res.options & RES_INIT) == 0) res_init();
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parents: 148
diff changeset
482 _res.retry = 2;
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parents: 148
diff changeset
483 _res.retrans = RES_TIMEOUT;
94
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parents: 92
diff changeset
484 glom.length = res_search(question, ns_c_in, ns_t_a, glom.answer, sizeof(glom.answer));
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parents: 92
diff changeset
485 if (glom.length < 0) glom.length = 0; // represent all errors as zero length answers
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parents: 92
diff changeset
486 #else
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parents: 92
diff changeset
487 glom.length = sizeof(glom.answer);
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parents: 92
diff changeset
488 glom.answer = 0;
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parents: 92
diff changeset
489 struct hostent *host = gethostbyname(question);
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parents: 92
diff changeset
490 if (host && (host->h_addrtype == AF_INET)) {
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carl
parents: 92
diff changeset
491 memcpy(&glom.answer, host->h_addr, sizeof(glom.answer));
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parents: 92
diff changeset
492 }
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parents: 92
diff changeset
493 #endif
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parents: 92
diff changeset
494
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parents: 92
diff changeset
495 // write the answer
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parents: 92
diff changeset
496 char *buf = (char *)&glom;
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parents: 92
diff changeset
497 int len = glom.length + sizeof(glom.length);
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parents: 92
diff changeset
498 #ifdef RESOLVER_DEBUG
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parents: 92
diff changeset
499 snprintf(text, sizeof(text), "process_resolver_requests() writing answer length %d for total %d", glom.length, len);
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parents: 92
diff changeset
500 my_syslog(text);
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parents: 92
diff changeset
501 #endif
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parents: 92
diff changeset
502 int ws = 0;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
503 while (len > ws) {
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carl
parents: 92
diff changeset
504 int ns = write(socket, buf+ws, len-ws);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
505 if (ns > 0) {
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parents: 92
diff changeset
506 ws += ns;
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parents: 92
diff changeset
507 }
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parents: 92
diff changeset
508 else {
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parents: 92
diff changeset
509 // peer closed the socket!
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carl
parents: 92
diff changeset
510 #ifdef RESOLVER_DEBUG
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parents: 92
diff changeset
511 my_syslog("process_resolver_requests() peer closed socket while writing answer");
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parents: 92
diff changeset
512 #endif
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parents: 92
diff changeset
513 shutdown(socket, SHUT_RDWR);
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parents: 92
diff changeset
514 close(socket);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
515 return;
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parents: 92
diff changeset
516 }
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parents: 92
diff changeset
517 }
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carl
parents: 92
diff changeset
518 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
519 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
520
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
521
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
522 ////////////////////////////////////////////////
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parents: 92
diff changeset
523 // ask a dns question and get an A record answer - we don't try
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carl
parents: 92
diff changeset
524 // very hard, just using the default resolver retry settings.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
525 // If we cannot get an answer, we just accept the mail.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
526 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
527 //
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parents: 92
diff changeset
528 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers);
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parents: 92
diff changeset
529 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers) {
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parents: 92
diff changeset
530 // this part can be done without locking the resolver mutex. Each
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carl
parents: 92
diff changeset
531 // milter thread is talking over its own socket to a separate resolver
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carl
parents: 92
diff changeset
532 // process, which does the actual dns resolution.
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parents: 92
diff changeset
533 if (priv.err) return 0; // cannot ask more questions on this socket.
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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parents: 132
diff changeset
534 if (maybe_ip) {
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parents: 132
diff changeset
535 // might be a bare ip address, try this first to avoid dns lookups that may not be needed
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parents: 132
diff changeset
536 in_addr ip;
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parents: 132
diff changeset
537 if (inet_aton(question, &ip)) {
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parents: 132
diff changeset
538 return (int)ip.s_addr;
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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parents: 132
diff changeset
539 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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parents: 132
diff changeset
540 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
541 int n = strlen(question);
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
542 if (question[n-1] == '.') {
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parents: 132
diff changeset
543 priv.my_write(question, n+1); // write the question including the null terminator
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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parents: 132
diff changeset
544 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
545 else {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
546 priv.my_write(question, n); // write the question
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
547 priv.my_write(".", 2); // and the fully qualified . terminator and null string terminator
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
548 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
549 glommer glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
550 char *buf = (char *)&glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
551 priv.my_read(buf, sizeof(glom.length));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
552 buf += sizeof(glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
553 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
554 char text[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
555 snprintf(text, sizeof(text), "dns_interface() wrote question %s and has answer length %d", question, glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
556 my_syslog(text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
557 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
558 if ((glom.length < 0) || (glom.length > sizeof(glom.answer))) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
559 priv.err = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
560 return 0; // cannot process overlarge answers
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
561 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
562 priv.my_read(buf, glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
563
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
564 #ifdef NS_PACKETSZ
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
565 // now we need to lock the resolver mutex to keep the milter threads from
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
566 // stepping on each other while parsing the dns answer.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
567 int ret_address = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
568 pthread_mutex_lock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
569 if (glom.length > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
570 // parse the answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
571 ns_msg handle;
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carl
parents: 92
diff changeset
572 ns_rr rr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
573 if (ns_initparse(glom.answer, glom.length, &handle) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
574 // look for ns names
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
575 if (nameservers) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
576 ns_map &ns = *nameservers;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
577 int rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
578 while (ns_parserr(&handle, ns_s_ns, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
579 if (ns_rr_type(rr) == ns_t_ns) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
580 char nam[NS_MAXDNAME+1];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
581 char *n = nam;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
582 const u_char *p = ns_rr_rdata(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
583 while (((n-nam) < NS_MAXDNAME) && ((p-glom.answer) < glom.length) && *p) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
584 size_t s = *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
585 if (s > 191) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
586 // compression pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
587 s = (s-192)*256 + *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
588 if (s >= glom.length) break; // pointer outside bounds of answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
589 p = glom.answer + s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
590 s = *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
591 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
592 if (s > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
593 if ((n-nam) >= (NS_MAXDNAME-s)) break; // destination would overflow name buffer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
594 if ((p-glom.answer) >= (glom.length-s)) break; // source outside bounds of answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
595 memcpy(n, p, s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
596 n += s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
597 p += s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
598 *(n++) = '.';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
599 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
600 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
601 if (n-nam) n--; // remove trailing .
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
602 *n = '\0'; // null terminate it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
603 ns.add(nam, question); // ns host to lookup later
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
604 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
605 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
606 rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
607 while (ns_parserr(&handle, ns_s_ar, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
608 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
609 char* nam = (char*)ns_rr_name(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
610 ns_mapper::iterator i = ns.ns_ip.find(nam);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
611 if (i != ns.ns_ip.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
612 // we want this ip address
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
613 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
614 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
615 ns.ns_ip[nam] = address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
616 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
617 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
618 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
619 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
620 int rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
621 while (ns_parserr(&handle, ns_s_an, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
622 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
623 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
624 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
625 ret_address = address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
626 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
627 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
628 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
629 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
630 pthread_mutex_unlock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
631 return ret_address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
632 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
633 return glom.answer;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
634 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
635 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
636
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
637
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
638 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
639 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
640 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
641 bool check_single(mlfiPriv &priv, int ip, char *suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
642 bool check_single(mlfiPriv &priv, int ip, char *suffix) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
643 // make a dns question
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
644 const u_char *src = (const u_char *)&ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
645 if (src[0] == 127) return false; // don't do dns lookups on localhost
126
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
646 if (src[0] == 10) return false; // don't do dns lookups on rfc1918 space
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
647 if ((src[0] == 192) && (src[1] == 168)) return false;
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
648 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
649 #ifdef NS_MAXDNAME
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carl
parents: 92
diff changeset
650 char question[NS_MAXDNAME];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
651 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
652 char question[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
653 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
654 snprintf(question, sizeof(question), "%u.%u.%u.%u.%s.", src[3], src[2], src[1], src[0], suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
655 // ask the question, if we get an A record it implies a blacklisted ip address
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
656 return dns_interface(priv, question, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
657 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
658
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
659
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
660 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
661 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
662 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
663 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
664 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
665 return check_single(priv, ip, bl.suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
666 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
667
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
668
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
669 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
670 // check the dnsbls specified for this recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
671 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
672 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
673 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
674 for (dnsblp_list::iterator i=dnsbll.begin(); i!=dnsbll.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
675 DNSBLP dp = *i; // non null by construction
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
676 bool st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
677 map<DNSBLP, bool>::iterator f = priv.checked.find(dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
678 if (f == priv.checked.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
679 // have not checked this list yet
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
680 st = check_single(priv, priv.ip, *dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
681 rejectlist = dp;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
682 priv.checked[dp] = st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
683 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
684 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
685 st = (*f).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
686 rejectlist = (*f).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
687 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
688 if (st) return st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
689 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
690 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
691 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
692
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
693
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
694 ////////////////////////////////////////////////
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
695 // lookup the domain name part of a hostname on the uribl
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
696 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
697 // if we find part of the hostname on the uribl, return
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
698 // true and point found to the part of the hostname that we found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
699 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
700 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
701 bool uriblookup(mlfiPriv &priv ,char *hostname, char *top, char *&found) ;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
702 bool uriblookup(mlfiPriv &priv, char *hostname, char *top, char *&found) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
703 // top is pointer to '.' char at end of base domain, or null for ip address form
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
704 // so for hostname of www.fred.mydomain.co.uk
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
705 // top points to-----------------------^
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
706 // and we end up looking at only mydomain.co.uk, ignoring the www.fred stuff
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
707 char buf[maxlen];
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
708 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
709 // add one more component
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
710 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
711 char *x = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
712 if (x) hostname = x+1;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
713 *top = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
714 }
131
df355d117199 uribl lookups fully qualified; allow two component host names
carl
parents: 129
diff changeset
715 snprintf(buf, sizeof(buf), "%s.%s.", hostname, priv.uribl_suffix);
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
716 if (dns_interface(priv, buf, false, NULL)) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
717 if (debug_syslog > 2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
718 char tmp[maxlen];
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
719 snprintf(tmp, sizeof(tmp), "found %s on %s", hostname, priv.uribl_suffix);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
720 my_syslog(tmp);
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
721 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
722 found = hostname;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
723 return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
724 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
725 return false;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
726 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
727
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
728
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
729 ////////////////////////////////////////////////
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
730 // uribl checker
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
731 // -------------
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
732 // hostname MUST not have a trailing dot
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
733 // If tld, two level lookup.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
734 // Else, look up three level domain.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
735 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
736 // if we find part of the hostname on the uribl, return
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
737 // true and point found to the part of the hostname that we found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
738 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
739 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
740 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) ;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
741 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
742 in_addr ip;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
743 if (inet_aton(hostname, &ip)) {
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
744 const u_char *src = (const u_char *)&ip.s_addr;
128
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
745 if (src[0] == 127) return false; // don't do dns lookups on localhost
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
746 if (src[0] == 10) return false; // don't do dns lookups on rfc1918 space
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
747 if ((src[0] == 192) && (src[1] == 168)) return false;
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
748 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
749 static char adr[sizeof "255.255.255.255"];
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
750 snprintf(adr, sizeof(adr), "%u.%u.%u.%u", src[3], src[2], src[1], src[0]);
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
751 return (uriblookup(priv, adr, NULL, found));
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
752 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
753
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
754 char *top, *top2, *top3;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
755 top = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
756 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
757 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
758 top2 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
759 *top = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
760
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
761 if (top2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
762 string_set::iterator i = priv.memory->get_cctlds()->find(top2+1);
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
763 string_set::iterator x = priv.memory->get_cctlds()->end();
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
764 // if we have a 2-level-cctld, just look at top three levels of the name
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
765 if (i != x) return uriblookup(priv, hostname, top2, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
766
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
767 *top2 = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
768 top3 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
769 *top2 = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
770
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
771 // if we have more than 3 levels in the name, look at the top three levels of the name
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
772 if (top3 && uriblookup(priv, hostname, top2, found)) return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
773 // if that was not found, fall thru to looking at the top two levels
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
774 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
775 // look at the top two levels of the name
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
776 return uriblookup(priv, hostname, top, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
777 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
778 return false;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
779 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
780
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
781
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
782 ////////////////////////////////////////////////
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
783 // check the hosts from the body against the content filter and uribl dnsbls
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
784 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
785 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
786 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
787 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
788 found = NULL; // normally ip address style
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
789 if (!priv.content_suffix && !priv.uribl_suffix) return false; // nothing to check
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
790 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
791 string_set &hosts = priv.memory->get_hosts();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
792 string_set &ignore = *priv.content_host_ignore;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
793
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
794 int count = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
795 int cnt = hosts.size(); // number of hosts we could look at
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
796 int_set ips;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
797 ns_map nameservers;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
798 for (string_set::iterator i=hosts.begin(); i!=hosts.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
799 host = *i; // a reference into hosts, which will live until this smtp transaction is closed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
800
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
801 // don't bother looking up hosts on the ignore list
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
802 string_set::iterator j = ignore.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
803 if (j != ignore.end()) continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
804
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
805 // try to only look at limit/cnt fraction of the available cnt host names in random mode
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
806 if ((cnt > limit) && (limit > 0) && random) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
807 int r = rand() % cnt;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
808 if (r >= limit) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
809 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
810 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
811 snprintf(buf, sizeof(buf), "host %s skipped", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
812 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
813 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
814 continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
815 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
816 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
817 count++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
818 ip = dns_interface(priv, host, true, &nameservers);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
819 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
820 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
821 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
822 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
823 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
824 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
825 snprintf(buf, sizeof(buf), "host %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
826 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
827 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
828 snprintf(buf, sizeof(buf), "host %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
829 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
830 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
831 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
832 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
833 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
834 if (i == ips.end()) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
835 // we haven't looked this up yet
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
836 ips.insert(ip);
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
837 // check dnsbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
838 if (priv.content_suffix && check_single(priv, ip, priv.content_suffix)) {
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
839 msg = priv.content_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
840 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
841 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
842 // Check uribl & surbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
843 if (priv.uribl_suffix && check_uribl(priv, host, found)) {
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
844 msg = priv.uribl_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
845 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
846 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
847 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
848 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
849 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
850 limit *= 4; // allow average of 3 ns per host name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
851 for (ns_mapper::iterator i=nameservers.ns_ip.begin(); i!=nameservers.ns_ip.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
852 count++;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
853 if ((count > limit) && (limit > 0)) return false; // too many name servers to check them all
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
854 host = (*i).first; // a transient reference that needs to be replaced before we return it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
855 ip = (*i).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
856 if (!ip) ip = dns_interface(priv, host, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
857 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
858 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
859 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
860 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
861 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
862 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
863 snprintf(buf, sizeof(buf), "ns %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
864 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
865 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
866 snprintf(buf, sizeof(buf), "ns %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
867 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
868 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
869 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
870 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
871 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
872 if (i == ips.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
873 ips.insert(ip);
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
874 if (check_single(priv, ip, priv.content_suffix)) {
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
875 msg = priv.content_message;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
876 string_map::iterator j = nameservers.ns_host.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
877 if (j != nameservers.ns_host.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
878 char *refer = (*j).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
879 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
880 snprintf(buf, sizeof(buf), "%s with nameserver %s", refer, host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
881 host = register_string(hosts, buf); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
882 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
883 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
884 host = register_string(hosts, host); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
885 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
886 return true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
887 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
888 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
889 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
890 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
891 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
892 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
893
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
894
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
895 ////////////////////////////////////////////////
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
896 //
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
897 // this email address is passed in from sendmail, and will normally be
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
898 // enclosed in <>. I think older versions of sendmail supplied the <>
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
899 // 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
900 // that. So the <> wrapper is now optional. It may have mixed case, just
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
901 // as the mail client sent it. We dup the string and convert the duplicate
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
902 // to lower case.
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
903 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
904 char *to_lower_string(char *email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
905 char *to_lower_string(char *email) {
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
906 int n = strlen(email);
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
907 if (*email == '<') {
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
908 // assume it also ends with >
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
909 n -= 2;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
910 if (n < 1) return strdup(email); // return "<>"
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
911 email++;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
912 }
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
913 char *key = strdup(email);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
914 key[n] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
915 for (int i=0; i<n; i++) key[i] = tolower(key[i]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
916 return key;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
917 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
918
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
919
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
920 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
921 // start of sendmail milter interfaces
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
922 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
923 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
924 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
925 // allocate some private memory
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
926 mlfiPriv *priv = new mlfiPriv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
927 if (hostaddr->sa_family == AF_INET) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
928 priv->ip = ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
929 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
930
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
931 // save the private data
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
932 smfi_setpriv(ctx, (void*)priv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
933
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
934 // continue processing
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
935 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
936 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
937
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
938 sfsistat mlfi_envfrom(SMFICTX *ctx, char **from)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
939 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
940 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
941 priv.mailaddr = to_lower_string(from[0]);
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
942 priv.authenticated = smfi_getsymval(ctx, "{auth_authen}");
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
943 if (priv.authenticated) priv.authenticated = strdup(priv.authenticated);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
944 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
945 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
946
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
947 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **rcpt)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
948 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
949 DNSBLP rejectlist = NULL; // list that caused the reject
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
950 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
951 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
952 if (!priv.queueid) priv.queueid = strdup(smfi_getsymval(ctx, "i"));
152
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
953 char *rcptaddr = rcpt[0];
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
954 char *loto = to_lower_string(rcptaddr);
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
955 // priv.mailaddr sending original message to loto
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
956 CONTEXT &con = *(dc.find_context(loto)->find_context(priv.mailaddr));
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
957 VERIFYP ver = con.find_verify(loto);
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
958 char *fromvalue = con.find_from(priv.mailaddr);
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
959 // loto sending a reply back to priv.mailaddr
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
960 CONTEXT &con2 = *(dc.find_context(priv.mailaddr)->find_context(loto));
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
961 char *replyvalue = con2.find_from(loto);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
962 if (debug_syslog > 1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
963 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
964 char msg[maxlen];
156
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
965 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);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
966 my_syslog(&priv, msg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
967 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
968 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
969 status st;
152
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
970 if (replyvalue == token_black) {
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
971 smfi_setreply(ctx, "550", "5.7.1", "recipient can not reply due to blacklisting");
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
972 return SMFIS_REJECT;
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
973 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
974 if (priv.authenticated) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
975 int c = incr_rcpt_count(priv.authenticated);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
976 int l = dc.default_context->find_rate(priv.authenticated);
142
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
977 if (debug_syslog > 1) {
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
978 char buf[maxlen];
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
979 char msg[maxlen];
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
980 snprintf(msg, sizeof(msg), "authenticated id %s (%d recipients, %d limit)", priv.authenticated, c, l);
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
981 my_syslog(&priv, msg);
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
982 }
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
983 if (c > l) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
984 smfi_setreply(ctx, "550", "5.7.1", "recipient rate limit exceeded");
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
985 return SMFIS_REJECT;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
986 }
142
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
987 st = white;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
988 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
989 else if (fromvalue == token_black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
990 st = black;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
991 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
992 else if (fromvalue == token_white) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
993 st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
994 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
995 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
996 // check the dns based lists
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
997 st = (check_dnsbl(priv, con.get_dnsbl_list(), rejectlist)) ? reject : oksofar;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
998 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
999 if (st == reject) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1000 // reject the recipient based on some dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1001 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1002 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1003 inet_ntop(AF_INET, (const u_char *)&priv.ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1004 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1005 snprintf(buf, sizeof(buf), rejectlist->message, adr, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1006 smfi_setreply(ctx, "550", "5.7.1", buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1007 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1008 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1009 if (st == black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1010 // reject the recipient based on blacklisting either from or to
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1011 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1012 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1013 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1014 if (ver && (st != white)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1015 // try to verify this from/to pair of addresses since it is not explicitly whitelisted
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1016 char *loto = to_lower_string(rcptaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1017 bool rc = ver->ok(priv.mailaddr, loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1018 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1019 if (!rc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1020 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1021 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1022 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1023 }
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1024 // we will accept the recipient, but add an auto-whitelist entry
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1025 // if needed to ensure we can accept replies
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1026 WHITELISTERP w = con2.find_autowhite(priv.mailaddr);
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1027 if (w) {
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1028 char *loto = to_lower_string(rcptaddr);
156
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1029 if (debug_syslog > 1) {
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1030 char buf[maxlen];
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1031 char msg[maxlen];
159
ea7c57a4a2d1 add auto whitelisting
carl
parents: 156
diff changeset
1032 snprintf(msg, sizeof(msg), "whitelist reply from <%s> in context %s", loto, con2.get_full_name(buf,maxlen));
156
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1033 my_syslog(&priv, msg);
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1034 }
154
89ce226e5383 add auto whitelisting
carl
parents: 153
diff changeset
1035 w->sent(loto); // don't free it, the whitelister takes ownership of the string
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1036 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1037 // accept the recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1038 if (!con.get_content_filtering()) st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1039 if (st == oksofar) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1040 // but remember the non-whites
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1041 priv.need_content_filter(rcptaddr, con);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1042 priv.only_whites = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1043 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1044 if (st == white) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1045 priv.have_whites = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1046 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1047 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1048 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1049
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1050 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1051 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1052 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1053 if (priv.authenticated) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1054 if (priv.only_whites) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1055 priv.scanner->scan(data, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1056 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1057 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1058
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1059 sfsistat mlfi_eom(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1060 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1061 sfsistat rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1062 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1063 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1064 char *host = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1065 int ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1066 status st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1067 // process end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1068 if (priv.authenticated || priv.only_whites) rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1069 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1070 // assert env_to not empty
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1071 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1072 char *msg = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1073 string_set alive;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1074 bool random = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1075 int limit = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1076 for (context_map::iterator i=priv.env_to.begin(); i!=priv.env_to.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1077 char *rcpt = (*i).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1078 CONTEXT &con = *((*i).second);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1079 if (!con.acceptable_content(*priv.memory, msg)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1080 // bad html tags or excessive hosts
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1081 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1082 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1083 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1084 alive.insert(rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1085 random |= con.get_host_random();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1086 limit = max(limit, con.get_host_limit());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1087 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1088 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1089 bool rejecting = alive.empty(); // if alive is empty, we must have set msg above in acceptable_content()
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1090 if (!rejecting) {
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1091 char *fmt, *found;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1092 if (check_hosts(priv, random, limit, fmt, host, ip, found)) {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1093 if (found) {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1094 // uribl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1095 snprintf(buf, sizeof(buf), fmt, host, found);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1096 }
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1097 else {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1098 // dnsbl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1099 char adr[sizeof "255.255.255.255"];
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1100 adr[0] = '\0';
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1101 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1102 snprintf(buf, sizeof(buf), fmt, host, adr);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1103 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1104 msg = buf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1105 rejecting = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1106 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1107 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1108 if (!rejecting) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1109 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1110 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1111 else if (!priv.have_whites) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1112 // can reject the entire message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1113 smfi_setreply(ctx, "550", "5.7.1", msg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1114 rc = SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1115 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1116 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1117 // need to accept it but remove the recipients that don't want it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1118 for (string_set::iterator i=alive.begin(); i!=alive.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1119 char *rcpt = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1120 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1121 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1122 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1123 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1124 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1125 // reset for a new message on the same connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1126 mlfi_abort(ctx);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1127 return rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1128 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1129
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1130 sfsistat mlfi_abort(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1131 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1132 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1133 priv.reset();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1134 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1135 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1136
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1137 sfsistat mlfi_close(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1138 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1139 mlfiPriv *priv = MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1140 if (!priv) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1141 delete priv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1142 smfi_setpriv(ctx, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1143 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1144 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1145
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1146 struct smfiDesc smfilter =
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1147 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1148 "DNSBL", // filter name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1149 SMFI_VERSION, // version code -- do not change
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1150 SMFIF_DELRCPT, // flags
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1151 mlfi_connect, // connection info filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1152 NULL, // SMTP HELO command filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1153 mlfi_envfrom, // envelope sender filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1154 mlfi_envrcpt, // envelope recipient filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1155 NULL, // header filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1156 NULL, // end of header
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1157 mlfi_body, // body block filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1158 mlfi_eom, // end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1159 mlfi_abort, // message aborted
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1160 mlfi_close, // connection cleanup
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1161 };
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1162
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1163
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1164 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1165 // reload the config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1166 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1167 CONFIG* new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1168 CONFIG* new_conf() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1169 CONFIG *newc = new CONFIG;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1170 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1171 newc->generation = generation++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1172 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1173 if (debug_syslog) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1174 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1175 snprintf(buf, sizeof(buf), "loading configuration generation %d", newc->generation);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1176 my_syslog(buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1177 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1178 if (load_conf(*newc, "dnsbl.conf")) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1179 newc->load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1180 return newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1181 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1182 delete newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1183 return NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1184 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1185
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1186
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1187 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1188 // thread to watch the old config files for changes
146
7278c9766e26 free old configs when last reference goes away
carl
parents: 143
diff changeset
1189 // and reload when needed.
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1190 // we also clear the SMTP AUTH recipient counts hourly
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1191 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1192 void* config_loader(void *arg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1193 void* config_loader(void *arg) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1194 int loop = 0;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1195 typedef set<CONFIG *> configp_set;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1196 while (loader_run) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1197 sleep(180); // look for modifications every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1198 if (!loader_run) break;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1199 loop++;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1200 if (loop == 20) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1201 // three minutes thru each loop, 20 loops per hour
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1202 // clear the recipient counts
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1203 pthread_mutex_lock(&rate_mutex);
138
9d0bc30b4576 add smtp auth rate limits
carl
parents: 137
diff changeset
1204 for (rcpt_rates::iterator i=rcpt_counts.begin(); i!=rcpt_counts.end(); i++) {
140
4028de9b46dd cleanup smtp rate limit code
carl
parents: 139
diff changeset
1205 (*i).second = 0;
138
9d0bc30b4576 add smtp auth rate limits
carl
parents: 137
diff changeset
1206 }
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1207 pthread_mutex_unlock(&rate_mutex);
137
a6190f7798f4 add smtp auth rate limits
carl
parents: 136
diff changeset
1208 loop = 0;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1209 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1210 CONFIG &dc = *config;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1211 time_t then = dc.load_time;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1212 struct stat st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1213 bool reload = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1214 for (string_set::iterator i=dc.config_files.begin(); i!=dc.config_files.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1215 char *fn = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1216 if (stat(fn, &st)) reload = true; // file disappeared
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1217 else if (st.st_mtime > then) reload = true; // file modified
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1218 if (reload) break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1219 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1220 if (reload) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1221 CONFIG *newc = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1222 if (newc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1223 // replace the global config pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1224 pthread_mutex_lock(&config_mutex);
146
7278c9766e26 free old configs when last reference goes away
carl
parents: 143
diff changeset
1225 CONFIG *pc = config;
7278c9766e26 free old configs when last reference goes away
carl
parents: 143
diff changeset
1226 bool last = pc && (!pc->reference_count);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1227 config = newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1228 pthread_mutex_unlock(&config_mutex);
146
7278c9766e26 free old configs when last reference goes away
carl
parents: 143
diff changeset
1229 if (last) delete pc; // there were no references to this config
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1230 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1231 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1232 // failed to load new config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1233 my_syslog("failed to load new configuration");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1234 system("echo 'failed to load new dnsbl configuration from /etc/dnsbl' | mail -s 'error in /etc/dnsbl configuration' root");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1235 // update the load time on the current config to prevent complaining every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1236 dc.load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1237 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1238 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1239 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1240 return NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1241 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1242
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1243
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1244 void usage(char *prog);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1245 void usage(char *prog)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1246 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1247 fprintf(stderr, "Usage: %s [-d [level]] [-c] [-s] [-e from|to] -r port -p sm-sock-addr [-t timeout]\n", prog);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1248 fprintf(stderr, "where port is for the connection to our own dns resolver processes\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1249 fprintf(stderr, " and should be local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1250 fprintf(stderr, "where sm-sock-addr is for the connection to sendmail\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1251 fprintf(stderr, " and should be one of\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1252 fprintf(stderr, " inet:port@ip-address\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1253 fprintf(stderr, " local:local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1254 fprintf(stderr, "-c will load and dump the config to stdout\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1255 fprintf(stderr, "-s will stress test the config loading code by repeating the load/free cycle\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1256 fprintf(stderr, " in an infinte loop.\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1257 fprintf(stderr, "-d will set the syslog message level, currently 0 to 3\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1258 fprintf(stderr, "-e will print the results of looking up the from and to addresses in the\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1259 fprintf(stderr, " current config. The | character is used to separate the from and to\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1260 fprintf(stderr, " addresses in the argument to the -e switch\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1261 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1262
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1263
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1264
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1265 void setup_socket(char *sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1266 void setup_socket(char *sock) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1267 unlink(sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1268 // sockaddr_un addr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1269 // memset(&addr, '\0', sizeof addr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1270 // addr.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1271 // strncpy(addr.sun_path, sock, sizeof(addr.sun_path)-1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1272 // int s = socket(AF_UNIX, SOCK_STREAM, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1273 // bind(s, (sockaddr*)&addr, sizeof(addr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1274 // close(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1275 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1276
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1277
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1278 /*
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1279 * The signal handler function -- only gets called when a SIGCHLD
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1280 * is received, ie when a child terminates
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1281 */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1282 void sig_chld(int signo)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1283 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1284 int status;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1285 /* Wait for any child without blocking */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1286 while (waitpid(-1, &status, WNOHANG) > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1287 // ignore child exit status, we only do this to cleanup zombies
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1288 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1289 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1290
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1291
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1292 int main(int argc, char**argv)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1293 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1294 token_init();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1295 bool check = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1296 bool stress = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1297 bool setconn = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1298 bool setreso = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1299 char *email = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1300 int c;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1301 const char *args = "r:p:t:e:d:chs";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1302 extern char *optarg;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1303
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1304 // Process command line options
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1305 while ((c = getopt(argc, argv, args)) != -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1306 switch (c) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1307 case 'r':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1308 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1309 fprintf(stderr, "Illegal resolver socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1310 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1311 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1312 resolver_port = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1313 setup_socket(resolver_port);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1314 setreso = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1315 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1316
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1317 case 'p':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1318 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1319 fprintf(stderr, "Illegal sendmail socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1320 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1321 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1322 if (smfi_setconn(optarg) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1323 fprintf(stderr, "smfi_setconn failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1324 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1325 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1326 if (strncasecmp(optarg, "unix:", 5) == 0) setup_socket(optarg + 5);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1327 else if (strncasecmp(optarg, "local:", 6) == 0) setup_socket(optarg + 6);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1328 setconn = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1329 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1330
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1331 case 't':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1332 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1333 fprintf(stderr, "Illegal timeout: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1334 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1335 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1336 if (smfi_settimeout(atoi(optarg)) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1337 fprintf(stderr, "smfi_settimeout failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1338 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1339 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1340 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1341
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1342 case 'e':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1343 if (email) free(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1344 email = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1345 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1346
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1347 case 'c':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1348 check = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1349 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1350
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1351 case 's':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1352 stress = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1353 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1354
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1355 case 'd':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1356 if (optarg == NULL || *optarg == '\0') debug_syslog = 1;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1357 else debug_syslog = atoi(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1358 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1359
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1360 case 'h':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1361 default:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1362 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1363 exit(EX_USAGE);
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
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1367 if (check) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1368 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1369 debug_syslog = 10;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1370 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1371 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1372 conf->dump();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1373 delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1374 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1375 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1376 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1377 return 1; // config failed to load
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1378 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1379 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1380
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1381 if (stress) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1382 fprintf(stdout, "stress testing\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1383 while (1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1384 for (int i=0; i<10; i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1385 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1386 if (conf) delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1387 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1388 fprintf(stdout, ".");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1389 fflush(stdout);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1390 sleep(1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1391 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1392 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1393
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1394 if (email) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1395 char *x = strchr(email, '|');
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1396 if (x) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1397 *x = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1398 char *from = strdup(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1399 char *to = strdup(x+1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1400 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1401 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1402 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1403 CONTEXTP con = conf->find_context(to);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1404 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1405 fprintf(stdout, "envelope to <%s> finds context %s\n", to, con->get_full_name(buf,maxlen));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1406 CONTEXTP fc = con->find_context(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1407 fprintf(stdout, "envelope from <%s> finds context %s\n", from, fc->get_full_name(buf,maxlen));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1408 char *st = fc->find_from(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1409 fprintf(stdout, "envelope from <%s> finds status %s\n", from, st);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1410 delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1411 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1412 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1413 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1414 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1415
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1416 if (!setconn) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1417 fprintf(stderr, "%s: Missing required -p argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1418 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1419 exit(EX_USAGE);
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 if (!setreso) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1423 fprintf(stderr, "%s: Missing required -r argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1424 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1425 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1426 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1427
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1428 if (smfi_register(smfilter) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1429 fprintf(stderr, "smfi_register failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1430 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1431 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1432
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1433 // switch to background mode
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1434 if (daemon(1,0) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1435 fprintf(stderr, "daemon() call failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1436 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1437 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1438
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1439 // write the pid
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1440 const char *pidpath = "/var/run/dnsbl.pid";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1441 unlink(pidpath);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1442 FILE *f = fopen(pidpath, "w");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1443 if (f) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1444 #ifdef linux
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1445 // from a comment in the DCC source code:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1446 // Linux threads are broken. Signals given the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1447 // original process are delivered to only the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1448 // thread that happens to have that PID. The
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1449 // sendmail libmilter thread that needs to hear
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1450 // SIGINT and other signals does not, and that breaks
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1451 // scripts that need to stop milters.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1452 // However, signaling the process group works.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1453 fprintf(f, "-%d\n", (u_int)getpgrp());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1454 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1455 fprintf(f, "%d\n", (u_int)getpid());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1456 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1457 fclose(f);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1458 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1459
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1460 // initialize the thread sync objects
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1461 pthread_mutex_init(&config_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1462 pthread_mutex_init(&syslog_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1463 pthread_mutex_init(&resolve_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1464 pthread_mutex_init(&fd_pool_mutex, 0);
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1465 pthread_mutex_init(&verifier_mutex, 0);
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1466 pthread_mutex_init(&whitelister_mutex, 0);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1467
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1468 // drop root privs
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1469 struct passwd *pw = getpwnam("dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1470 if (pw) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1471 if (setgid(pw->pw_gid) == -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1472 my_syslog("failed to switch to group dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1473 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1474 if (setuid(pw->pw_uid) == -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1475 my_syslog("failed to switch to user dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1476 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1477 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1478
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1479 // load the initial config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1480 config = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1481 if (!config) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1482 my_syslog("failed to load initial configuration, quitting");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1483 exit(1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1484 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1485
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1486 // fork off the resolver listener process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1487 pid_t child = fork();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1488 if (child < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1489 my_syslog("failed to create resolver listener process");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1490 exit(0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1491 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1492 if (child == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1493 // we are the child - dns resolver listener process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1494 resolver_socket = socket(AF_UNIX, SOCK_STREAM, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1495 if (resolver_socket < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1496 my_syslog("child failed to create resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1497 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1498 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1499 sockaddr_un server;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1500 memset(&server, '\0', sizeof(server));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1501 server.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1502 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1503 //try to bind the address to the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1504 if (bind(resolver_socket, (sockaddr *)&server, sizeof(server)) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1505 // bind failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1506 shutdown(resolver_socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1507 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1508 my_syslog("child failed to bind resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1509 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1510 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1511 //listen on the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1512 if (listen(resolver_socket, 10) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1513 // listen failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1514 shutdown(resolver_socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1515 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1516 my_syslog("child failed to listen to resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1517 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1518 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1519 // setup sigchld handler to prevent zombies
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1520 struct sigaction act;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1521 act.sa_handler = sig_chld; // Assign sig_chld as our SIGCHLD handler
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1522 sigemptyset(&act.sa_mask); // We don't want to block any other signals in this example
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1523 act.sa_flags = SA_NOCLDSTOP; // only want children that have terminated
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1524 if (sigaction(SIGCHLD, &act, NULL) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1525 my_syslog("child failed to setup SIGCHLD handler");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1526 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1527 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1528 while (true) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1529 sockaddr_un client;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1530 socklen_t clientlen = sizeof(client);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1531 int s = accept(resolver_socket, (sockaddr *)&client, &clientlen);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1532 if (s > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1533 // accept worked, it did not get cancelled before we could accept it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1534 // fork off a process to handle this connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1535 int newchild = fork();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1536 if (newchild == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1537 // this is the worker process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1538 // child does not need the listening socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1539 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1540 process_resolver_requests(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1541 exit(0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1542 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1543 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1544 // this is the parent
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1545 // parent does not need the accepted socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1546 close(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1547 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1548 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1549 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1550 exit(0); // make sure we don't fall thru.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1551 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1552 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1553 sleep(2); // allow child to get started
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1554 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1555
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1556 // only create threads after the fork() in daemon
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1557 pthread_t tid;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1558 if (pthread_create(&tid, 0, config_loader, 0))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1559 my_syslog("failed to create config loader thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1560 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1561 my_syslog("failed to detach config loader thread");
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1562
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1563 if (pthread_create(&tid, 0, verify_closer, 0))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1564 my_syslog("failed to create verify closer thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1565 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1566 my_syslog("failed to detach verify closer thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1567
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1568 if (pthread_create(&tid, 0, whitelister_writer, 0))
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1569 my_syslog("failed to create autowhite writer thread");
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1570 if (pthread_detach(tid))
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1571 my_syslog("failed to detach autowhite writer thread");
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1572
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1573 time_t starting = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1574 int rc = smfi_main();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1575 if ((rc != MI_SUCCESS) && (time(NULL) > starting+5*60)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1576 my_syslog("trying to restart after smfi_main()");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1577 loader_run = false; // eventually the config loader thread will terminate
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1578 execvp(argv[0], argv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1579 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1580 exit((rc == MI_SUCCESS) ? 0 : EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1581 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1582