annotate src/dnsbl.cpp @ 168:6bac960af6b4

add generic reverse dns filtering regex
author carl
date Thu, 30 Aug 2007 11:08:46 -0700
parents 9b129ed78d7d
children d3189495ec68
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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 level set the 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_helo(SMFICTX * ctx, char *helohost);
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69 sfsistat mlfi_envfrom(SMFICTX *ctx, char **argv);
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70 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **argv);
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71 sfsistat mlfi_header(SMFICTX* ctx, char* headerf, char* headerv);
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72 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len);
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73 sfsistat mlfi_eom(SMFICTX *ctx);
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74 sfsistat mlfi_abort(SMFICTX *ctx);
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75 sfsistat mlfi_close(SMFICTX *ctx);
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76 void sig_chld(int signo);
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77 }
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78
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79 int debug_syslog = 0;
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80 bool syslog_opened = false;
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81 bool use_syslog = true; // false to printf
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82 bool loader_run = true; // used to stop the config loader thread
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83 CONFIG *config = NULL; // protected by the config_mutex
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84 int generation = 0; // protected by the config_mutex
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85 const int maxlen = 1000; // used for snprintf buffers
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86
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87 pthread_mutex_t config_mutex;
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88 pthread_mutex_t syslog_mutex;
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89 pthread_mutex_t resolve_mutex;
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90 pthread_mutex_t fd_pool_mutex;
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91 pthread_mutex_t rate_mutex;
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92
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93 std::set<int> fd_pool;
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94 int NULL_SOCKET = -1;
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95 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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96 char *resolver_port = NULL; // unix domain socket to talk to the dns resolver process
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97 int resolver_socket = NULL_SOCKET; // socket used to listen for resolver requests
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98 time_t last_error_time;
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99 int resolver_sock_count = 0; // protected with fd_pool_mutex
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100 int resolver_pool_size = 0; // protected with fd_pool_mutex
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101 rcpt_rates rcpt_counts; // protected with rate_mutex
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102
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103
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104 struct ns_map {
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105 // all the strings are owned by the keys/values in the ns_host string map
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106 string_map ns_host; // nameserver name -> host name that uses this name server
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107 ns_mapper ns_ip; // nameserver name -> ip address of the name server
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108 ~ns_map();
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109 void add(char *name, char *refer);
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110 };
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111
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112
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113 ns_map::~ns_map() {
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114 for (string_map::iterator i=ns_host.begin(); i!=ns_host.end(); i++) {
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115 char *x = (*i).first;
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116 char *y = (*i).second;
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117 free(x);
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118 free(y);
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119 }
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120 ns_ip.clear();
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121 ns_host.clear();
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122 }
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123
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124
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125 void ns_map::add(char *name, char *refer) {
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126 string_map::iterator i = ns_host.find(name);
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127 if (i != ns_host.end()) return;
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128 char *x = strdup(name);
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129 char *y = strdup(refer);
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130 ns_ip[x] = 0;
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131 ns_host[x] = y;
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132
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133 }
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134
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135 // packed structure to allow a single socket write to dump the
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136 // length and the following answer. The packing attribute is gcc specific.
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137 struct glommer {
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138 int length;
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139 #ifdef NS_PACKETSZ
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140 u_char answer[NS_PACKETSZ*4]; // with a resolver, we return resolver answers
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141 #else
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142 int answer; // without a resolver, we return a single ip4 address, 0 == no answer
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143 #endif
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144 } __attribute__ ((packed));
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145
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146
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147 ////////////////////////////////////////////////
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148 // helper to manipulate recipient counts
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149 //
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150 int incr_rcpt_count(char *user);
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151 int incr_rcpt_count(char *user) {
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152 pthread_mutex_lock(&rate_mutex);
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153 rcpt_rates::iterator i = rcpt_counts.find(user);
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154 int c = 1;
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155 if (i == rcpt_counts.end()) {
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156 user = strdup(user);
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157 rcpt_counts[user] = c;
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158 }
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159 else {
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160 c = ++((*i).second);
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161 }
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162 pthread_mutex_unlock(&rate_mutex);
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163 return c;
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164 }
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165
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166 ////////////////////////////////////////////////
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167 // helper to discard the strings held by a context_map
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168 //
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169 void discard(context_map &cm);
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170 void discard(context_map &cm) {
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171 for (context_map::iterator i=cm.begin(); i!=cm.end(); i++) {
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172 char *x = (*i).first;
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173 free(x);
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174 }
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175 cm.clear();
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176 }
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177
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178
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179 ////////////////////////////////////////////////
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180 // helper to register a string in a context_map
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181 //
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182 void register_string(context_map &cm, char *name, CONTEXT *con);
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183 void register_string(context_map &cm, char *name, CONTEXT *con) {
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184 context_map::iterator i = cm.find(name);
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185 if (i != cm.end()) return;
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186 char *x = strdup(name);
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187 cm[x] = con;
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188 }
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189
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190
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191 ////////////////////////////////////////////////
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192 // disconnect the fd from the dns resolver process
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193 //
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194 void my_disconnect(int sock, bool decrement = true);
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195 void my_disconnect(int sock, bool decrement) {
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196 if (sock != NULL_SOCKET) {
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197 if (decrement) {
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198 pthread_mutex_lock(&fd_pool_mutex);
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199 resolver_sock_count--;
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200 pthread_mutex_unlock(&fd_pool_mutex);
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201 }
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202 shutdown(sock, SHUT_RDWR);
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203 close(sock);
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204 }
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205 }
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206
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207
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208 ////////////////////////////////////////////////
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209 // return fd connected to the dns resolver process
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210 //
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211 int my_connect();
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212 int my_connect() {
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213 // if we have had recent errors, don't even try to open the socket
129
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214 if ((time(NULL) - last_error_time) < ERROR_SOCKET_TIME) return NULL_SOCKET;
94
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215
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216 // nothing recent, maybe this time it will work
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217 int sock = NULL_SOCKET;
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218 sockaddr_un server;
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219 memset(&server, '\0', sizeof(server));
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220 server.sun_family = AF_UNIX;
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221 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
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222 sock = socket(AF_UNIX, SOCK_STREAM, 0);
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223 if (sock != NULL_SOCKET) {
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224 bool rc = (connect(sock, (sockaddr *)&server, sizeof(server)) == 0);
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225 if (!rc) {
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226 my_disconnect(sock, false);
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227 sock = NULL_SOCKET;
129
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228 last_error_time = time(NULL);
94
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229 }
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230 }
129
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231 else last_error_time = time(NULL);
94
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232 if (sock != NULL_SOCKET) {
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233 pthread_mutex_lock(&fd_pool_mutex);
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234 resolver_sock_count++;
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235 pthread_mutex_unlock(&fd_pool_mutex);
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236 }
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237 return sock;
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238 }
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239
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240
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241 mlfiPriv::mlfiPriv() {
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242 pthread_mutex_lock(&config_mutex);
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243 pc = config;
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244 pc->reference_count++;
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245 pthread_mutex_unlock(&config_mutex);
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246 get_fd();
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247 ip = 0;
163
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248 helo = NULL;
94
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249 mailaddr = NULL;
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250 queueid = NULL;
136
f4746d8a12a3 add smtp auth rate limits
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251 authenticated = NULL;
168
6bac960af6b4 add generic reverse dns filtering regex
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252 client_name = NULL;
94
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diff changeset
253 have_whites = false;
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254 only_whites = true;
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
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255 want_spamassassin = false;
94
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diff changeset
256 memory = NULL;
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diff changeset
257 scanner = NULL;
165
bf828f785407 fix unitialized variable
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parents: 164
diff changeset
258 assassin = NULL;
94
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diff changeset
259 content_suffix = NULL;
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diff changeset
260 content_message = NULL;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
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261 uribl_suffix = NULL;
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262 uribl_message = NULL;
94
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263 content_host_ignore = NULL;
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264 }
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265
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266 mlfiPriv::~mlfiPriv() {
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267 return_fd();
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268 pthread_mutex_lock(&config_mutex);
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diff changeset
269 pc->reference_count--;
146
7278c9766e26 free old configs when last reference goes away
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diff changeset
270 bool last = (!pc->reference_count) && (pc != config);
94
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diff changeset
271 pthread_mutex_unlock(&config_mutex);
146
7278c9766e26 free old configs when last reference goes away
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diff changeset
272 if (last) delete pc; // free this config, since we were the last reference to it
163
97d7da45fe2a spamassassin changes
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273 if (helo) free(helo);
94
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274 reset(true);
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275 }
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276
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diff changeset
277 void mlfiPriv::reset(bool final) {
136
f4746d8a12a3 add smtp auth rate limits
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diff changeset
278 if (mailaddr) free(mailaddr);
f4746d8a12a3 add smtp auth rate limits
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diff changeset
279 if (queueid) free(queueid);
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280 if (authenticated) free(authenticated);
168
6bac960af6b4 add generic reverse dns filtering regex
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281 if (client_name) free(client_name);
94
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282 discard(env_to);
163
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283 if (memory) delete memory;
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diff changeset
284 if (scanner) delete scanner;
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285 if (assassin) delete assassin;
94
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286 if (!final) {
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287 mailaddr = NULL;
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288 queueid = NULL;
136
f4746d8a12a3 add smtp auth rate limits
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diff changeset
289 authenticated = NULL;
168
6bac960af6b4 add generic reverse dns filtering regex
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diff changeset
290 client_name = NULL;
94
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diff changeset
291 have_whites = false;
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diff changeset
292 only_whites = true;
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
293 want_spamassassin = false;
94
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diff changeset
294 memory = NULL;
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diff changeset
295 scanner = NULL;
163
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diff changeset
296 assassin = NULL;
94
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diff changeset
297 content_suffix = NULL;
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diff changeset
298 content_message = NULL;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
299 uribl_suffix = NULL;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
300 uribl_message = NULL;
94
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diff changeset
301 content_host_ignore = NULL;
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parents: 92
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302 }
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diff changeset
303 }
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diff changeset
304
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diff changeset
305 void mlfiPriv::get_fd() {
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diff changeset
306 err = true;
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parents: 92
diff changeset
307 fd = NULL_SOCKET;
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diff changeset
308 int result = pthread_mutex_lock(&fd_pool_mutex);
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diff changeset
309 if (!result) {
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diff changeset
310 std::set<int>::iterator i;
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diff changeset
311 i = fd_pool.begin();
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diff changeset
312 if (i != fd_pool.end()) {
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diff changeset
313 // have at least one fd in the pool
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diff changeset
314 err = false;
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diff changeset
315 fd = *i;
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diff changeset
316 fd_pool.erase(fd);
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diff changeset
317 resolver_pool_size--;
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parents: 92
diff changeset
318 pthread_mutex_unlock(&fd_pool_mutex);
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parents: 92
diff changeset
319 }
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parents: 92
diff changeset
320 else {
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diff changeset
321 // pool is empty, get a new fd
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parents: 92
diff changeset
322 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
323 fd = my_connect();
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
324 err = (fd == NULL_SOCKET);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
325 }
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
326 }
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
327 else {
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parents: 92
diff changeset
328 // cannot lock the pool, just get a new fd
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parents: 92
diff changeset
329 fd = my_connect();
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parents: 92
diff changeset
330 err = (fd == NULL_SOCKET);
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parents: 92
diff changeset
331 }
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parents: 92
diff changeset
332 }
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parents: 92
diff changeset
333
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
334 void mlfiPriv::return_fd() {
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parents: 92
diff changeset
335 if (err) {
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parents: 92
diff changeset
336 // this fd got a socket error, so close it, rather than returning it to the pool
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
337 my_disconnect(fd);
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parents: 92
diff changeset
338 }
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
339 else {
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parents: 92
diff changeset
340 int result = pthread_mutex_lock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
341 if (!result) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
342 if ((resolver_sock_count > resolver_pool_size*5) || (resolver_pool_size < 5)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
343 // return the fd to the pool
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parents: 92
diff changeset
344 fd_pool.insert(fd);
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parents: 92
diff changeset
345 resolver_pool_size++;
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parents: 92
diff changeset
346 pthread_mutex_unlock(&fd_pool_mutex);
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carl
parents: 92
diff changeset
347 }
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carl
parents: 92
diff changeset
348 else {
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parents: 92
diff changeset
349 // more than 20% of the open resolver sockets are in the pool, and the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
350 // pool as at least 5 sockets. that is enough, so just close this one.
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carl
parents: 92
diff changeset
351 pthread_mutex_unlock(&fd_pool_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
352 my_disconnect(fd);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
353 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
354 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
355 else {
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carl
parents: 92
diff changeset
356 // could not lock the pool, so just close the fd
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
357 my_disconnect(fd);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
358 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
359 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
360 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
361
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
362 int mlfiPriv::my_write(char *buf, int len) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
363 if (err) return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
364 int rs = 0;
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carl
parents: 92
diff changeset
365 while (len) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
366 int ws = write(fd, buf, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
367 if (ws > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
368 rs += ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
369 len -= ws;
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carl
parents: 92
diff changeset
370 buf += ws;
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carl
parents: 92
diff changeset
371 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
372 else {
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parents: 92
diff changeset
373 // peer closed the socket!
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parents: 92
diff changeset
374 rs = 0;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
375 err = true;
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parents: 92
diff changeset
376 break;
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parents: 92
diff changeset
377 }
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carl
parents: 92
diff changeset
378 }
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parents: 92
diff changeset
379 return rs;
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parents: 92
diff changeset
380 }
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carl
parents: 92
diff changeset
381
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
382 int mlfiPriv::my_read(char *buf, int len) {
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carl
parents: 92
diff changeset
383 if (err) return 0;
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carl
parents: 92
diff changeset
384 int rs = 0;
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
385 while (len) {
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
386 int ws = read(fd, buf, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
387 if (ws > 0) {
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carl
parents: 92
diff changeset
388 rs += ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
389 len -= ws;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
390 buf += ws;
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carl
parents: 92
diff changeset
391 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
392 else {
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carl
parents: 92
diff changeset
393 // peer closed the socket!
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parents: 92
diff changeset
394 rs = 0;
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parents: 92
diff changeset
395 err = true;
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parents: 92
diff changeset
396 break;
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carl
parents: 92
diff changeset
397 }
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carl
parents: 92
diff changeset
398 }
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carl
parents: 92
diff changeset
399 return rs;
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carl
parents: 92
diff changeset
400 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
401
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parents: 92
diff changeset
402 void mlfiPriv::need_content_filter(char *rcpt, CONTEXT &con) {
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parents: 92
diff changeset
403 register_string(env_to, rcpt, &con);
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parents: 92
diff changeset
404 if (!memory) {
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parents: 92
diff changeset
405 // first recipient that needs content filtering sets all
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parents: 92
diff changeset
406 // the content filtering parameters
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
407 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
408 scanner = new url_scanner(memory);
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parents: 92
diff changeset
409 content_suffix = con.get_content_suffix();
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parents: 92
diff changeset
410 content_message = con.get_content_message();
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
411 uribl_suffix = con.get_uribl_suffix();
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
412 uribl_message = con.get_uribl_message();
94
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parents: 92
diff changeset
413 content_host_ignore = &con.get_content_host_ignore();
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parents: 92
diff changeset
414 }
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parents: 92
diff changeset
415 }
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parents: 92
diff changeset
416
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parents: 92
diff changeset
417 #define MLFIPRIV ((struct mlfiPriv *) smfi_getpriv(ctx))
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parents: 92
diff changeset
418
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parents: 92
diff changeset
419
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diff changeset
420 ////////////////////////////////////////////////
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parents: 92
diff changeset
421 // syslog a message
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parents: 92
diff changeset
422 //
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parents: 92
diff changeset
423 void my_syslog(mlfiPriv *priv, char *text) {
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parents: 92
diff changeset
424 char buf[maxlen];
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parents: 92
diff changeset
425 if (priv) {
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parents: 92
diff changeset
426 snprintf(buf, sizeof(buf), "%s: %s", priv->queueid, text);
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parents: 92
diff changeset
427 text = buf;
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parents: 92
diff changeset
428 }
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parents: 92
diff changeset
429 if (use_syslog) {
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parents: 92
diff changeset
430 pthread_mutex_lock(&syslog_mutex);
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parents: 92
diff changeset
431 if (!syslog_opened) {
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parents: 92
diff changeset
432 openlog("dnsbl", LOG_PID, LOG_MAIL);
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parents: 92
diff changeset
433 syslog_opened = true;
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parents: 92
diff changeset
434 }
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parents: 92
diff changeset
435 syslog(LOG_NOTICE, "%s", text);
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parents: 92
diff changeset
436 pthread_mutex_unlock(&syslog_mutex);
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parents: 92
diff changeset
437 }
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parents: 92
diff changeset
438 else {
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parents: 92
diff changeset
439 printf("%s \n", text);
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parents: 92
diff changeset
440 }
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parents: 92
diff changeset
441 }
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parents: 92
diff changeset
442
163
97d7da45fe2a spamassassin changes
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parents: 162
diff changeset
443 void my_syslog(mlfiPriv *priv, string text) {
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carl
parents: 162
diff changeset
444 if (debug_syslog > 3) {
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parents: 162
diff changeset
445 char buf[maxlen];
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parents: 162
diff changeset
446 strncpy(buf, text.c_str(), sizeof(buf));
97d7da45fe2a spamassassin changes
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parents: 162
diff changeset
447 buf[maxlen-1] = '\0'; // ensure null termination
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carl
parents: 162
diff changeset
448 my_syslog(priv, buf);
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parents: 162
diff changeset
449 }
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parents: 162
diff changeset
450 }
97d7da45fe2a spamassassin changes
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parents: 162
diff changeset
451
94
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parents: 92
diff changeset
452 void my_syslog(char *text) {
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parents: 92
diff changeset
453 my_syslog(NULL, text);
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parents: 92
diff changeset
454 }
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parents: 92
diff changeset
455
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parents: 92
diff changeset
456
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parents: 92
diff changeset
457 ////////////////////////////////////////////////
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parents: 92
diff changeset
458 // read a resolver request from the socket, process it, and
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parents: 92
diff changeset
459 // write the result back to the socket.
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parents: 92
diff changeset
460
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parents: 92
diff changeset
461 void process_resolver_requests(int socket);
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parents: 92
diff changeset
462 void process_resolver_requests(int socket) {
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parents: 92
diff changeset
463 #ifdef NS_MAXDNAME
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parents: 92
diff changeset
464 char question[NS_MAXDNAME];
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parents: 92
diff changeset
465 #else
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parents: 92
diff changeset
466 char question[1000];
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parents: 92
diff changeset
467 #endif
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parents: 92
diff changeset
468 glommer glom;
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parents: 92
diff changeset
469
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parents: 92
diff changeset
470 int maxq = sizeof(question);
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parents: 92
diff changeset
471 while (true) {
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parents: 92
diff changeset
472 // read a question
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parents: 92
diff changeset
473 int rs = 0;
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carl
parents: 92
diff changeset
474 while (rs < maxq) {
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parents: 92
diff changeset
475 int ns = read(socket, question+rs, maxq-rs);
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parents: 92
diff changeset
476 if (ns > 0) {
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parents: 92
diff changeset
477 rs += ns;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
478 if (question[rs-1] == '\0') {
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carl
parents: 92
diff changeset
479 // last byte read was the null terminator, we are done
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parents: 92
diff changeset
480 break;
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parents: 92
diff changeset
481 }
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parents: 92
diff changeset
482 }
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parents: 92
diff changeset
483 else {
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parents: 92
diff changeset
484 // peer closed the socket
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parents: 92
diff changeset
485 #ifdef RESOLVER_DEBUG
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parents: 92
diff changeset
486 my_syslog("process_resolver_requests() peer closed socket while reading question");
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parents: 92
diff changeset
487 #endif
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parents: 92
diff changeset
488 shutdown(socket, SHUT_RDWR);
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parents: 92
diff changeset
489 close(socket);
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parents: 92
diff changeset
490 return;
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parents: 92
diff changeset
491 }
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parents: 92
diff changeset
492 }
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parents: 92
diff changeset
493 question[rs-1] = '\0'; // ensure null termination
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parents: 92
diff changeset
494
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parents: 92
diff changeset
495 // find the answer
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parents: 92
diff changeset
496 #ifdef NS_PACKETSZ
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parents: 92
diff changeset
497 #ifdef RESOLVER_DEBUG
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parents: 92
diff changeset
498 char text[1000];
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parents: 92
diff changeset
499 snprintf(text, sizeof(text), "process_resolver_requests() has a question %s", question);
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parents: 92
diff changeset
500 my_syslog(text);
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parents: 92
diff changeset
501 #endif
150
a23ef169d322 limit dns resolver timeouts and retry interval
carl
parents: 148
diff changeset
502 if ((_res.options & RES_INIT) == 0) res_init();
a23ef169d322 limit dns resolver timeouts and retry interval
carl
parents: 148
diff changeset
503 _res.retry = 2;
a23ef169d322 limit dns resolver timeouts and retry interval
carl
parents: 148
diff changeset
504 _res.retrans = RES_TIMEOUT;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
505 glom.length = res_search(question, ns_c_in, ns_t_a, glom.answer, sizeof(glom.answer));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
506 if (glom.length < 0) glom.length = 0; // represent all errors as zero length answers
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
507 #else
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carl
parents: 92
diff changeset
508 glom.length = sizeof(glom.answer);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
509 glom.answer = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
510 struct hostent *host = gethostbyname(question);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
511 if (host && (host->h_addrtype == AF_INET)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
512 memcpy(&glom.answer, host->h_addr, sizeof(glom.answer));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
513 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
514 #endif
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carl
parents: 92
diff changeset
515
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
516 // write the answer
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carl
parents: 92
diff changeset
517 char *buf = (char *)&glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
518 int len = glom.length + sizeof(glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
519 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
520 snprintf(text, sizeof(text), "process_resolver_requests() writing answer length %d for total %d", glom.length, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
521 my_syslog(text);
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carl
parents: 92
diff changeset
522 #endif
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carl
parents: 92
diff changeset
523 int ws = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
524 while (len > ws) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
525 int ns = write(socket, buf+ws, len-ws);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
526 if (ns > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
527 ws += ns;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
528 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
529 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
530 // peer closed the socket!
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carl
parents: 92
diff changeset
531 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
532 my_syslog("process_resolver_requests() peer closed socket while writing answer");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
533 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
534 shutdown(socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
535 close(socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
536 return;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
537 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
538 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
539 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
540 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
541
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
542
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
543 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
544 // ask a dns question and get an A record answer - we don't try
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
545 // very hard, just using the default resolver retry settings.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
546 // If we cannot get an answer, we just accept the mail.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
547 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
548 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
549 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
550 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
551 // this part can be done without locking the resolver mutex. Each
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
552 // milter thread is talking over its own socket to a separate resolver
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
553 // process, which does the actual dns resolution.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
554 if (priv.err) return 0; // cannot ask more questions on this socket.
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
555 if (maybe_ip) {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
556 // might be a bare ip address, try this first to avoid dns lookups that may not be needed
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
557 in_addr ip;
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
558 if (inet_aton(question, &ip)) {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
559 return (int)ip.s_addr;
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
560 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
561 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
562 int n = strlen(question);
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
563 if (question[n-1] == '.') {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
564 priv.my_write(question, n+1); // write the question including the null terminator
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
565 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
566 else {
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
567 priv.my_write(question, n); // write the question
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
568 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
569 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
570 glommer glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
571 char *buf = (char *)&glom;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
572 priv.my_read(buf, sizeof(glom.length));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
573 buf += sizeof(glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
574 #ifdef RESOLVER_DEBUG
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
575 char text[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
576 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
577 my_syslog(text);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
578 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
579 if ((glom.length < 0) || (glom.length > sizeof(glom.answer))) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
580 priv.err = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
581 return 0; // cannot process overlarge answers
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
582 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
583 priv.my_read(buf, glom.length);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
584
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
585 #ifdef NS_PACKETSZ
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
586 // now we need to lock the resolver mutex to keep the milter threads from
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
587 // stepping on each other while parsing the dns answer.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
588 int ret_address = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
589 pthread_mutex_lock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
590 if (glom.length > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
591 // parse the answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
592 ns_msg handle;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
593 ns_rr rr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
594 if (ns_initparse(glom.answer, glom.length, &handle) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
595 // look for ns names
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
596 if (nameservers) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
597 ns_map &ns = *nameservers;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
598 int rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
599 while (ns_parserr(&handle, ns_s_ns, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
600 if (ns_rr_type(rr) == ns_t_ns) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
601 char nam[NS_MAXDNAME+1];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
602 char *n = nam;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
603 const u_char *p = ns_rr_rdata(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
604 while (((n-nam) < NS_MAXDNAME) && ((p-glom.answer) < glom.length) && *p) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
605 size_t s = *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
606 if (s > 191) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
607 // compression pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
608 s = (s-192)*256 + *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
609 if (s >= glom.length) break; // pointer outside bounds of answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
610 p = glom.answer + s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
611 s = *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
612 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
613 if (s > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
614 if ((n-nam) >= (NS_MAXDNAME-s)) break; // destination would overflow name buffer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
615 if ((p-glom.answer) >= (glom.length-s)) break; // source outside bounds of answer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
616 memcpy(n, p, s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
617 n += s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
618 p += s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
619 *(n++) = '.';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
620 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
621 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
622 if (n-nam) n--; // remove trailing .
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
623 *n = '\0'; // null terminate it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
624 ns.add(nam, question); // ns host to lookup later
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
625 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
626 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
627 rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
628 while (ns_parserr(&handle, ns_s_ar, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
629 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
630 char* nam = (char*)ns_rr_name(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
631 ns_mapper::iterator i = ns.ns_ip.find(nam);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
632 if (i != ns.ns_ip.end()) {
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carl
parents: 92
diff changeset
633 // we want this ip address
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
634 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
635 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
636 ns.ns_ip[nam] = address;
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 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
640 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
641 int rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
642 while (ns_parserr(&handle, ns_s_an, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
643 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
644 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
645 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
646 ret_address = address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
647 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
648 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
649 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
650 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
651 pthread_mutex_unlock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
652 return ret_address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
653 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
654 return glom.answer;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
655 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
656 }
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 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
661 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
662 bool check_single(mlfiPriv &priv, int ip, char *suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
663 bool check_single(mlfiPriv &priv, int ip, char *suffix) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
664 // make a dns question
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
665 const u_char *src = (const u_char *)&ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
666 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
667 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
668 if ((src[0] == 192) && (src[1] == 168)) return false;
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
669 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
670 #ifdef NS_MAXDNAME
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
671 char question[NS_MAXDNAME];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
672 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
673 char question[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
674 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
675 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
676 // 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
677 return dns_interface(priv, question, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
678 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
679
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
680
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
681 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
682 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
683 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
684 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
685 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
686 return check_single(priv, ip, bl.suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
687 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
688
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
689
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
690 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
691 // check the dnsbls specified for this recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
692 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
693 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
694 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
695 for (dnsblp_list::iterator i=dnsbll.begin(); i!=dnsbll.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
696 DNSBLP dp = *i; // non null by construction
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
697 bool st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
698 map<DNSBLP, bool>::iterator f = priv.checked.find(dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
699 if (f == priv.checked.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
700 // have not checked this list yet
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
701 st = check_single(priv, priv.ip, *dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
702 rejectlist = dp;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
703 priv.checked[dp] = st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
704 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
705 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
706 st = (*f).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
707 rejectlist = (*f).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
708 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
709 if (st) return st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
710 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
711 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
712 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
713
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
714
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
715 ////////////////////////////////////////////////
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
716 // 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
717 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
718 // 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
719 // 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
720 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
721 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
722 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
723 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
724 // 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
725 // so for hostname of www.fred.mydomain.co.uk
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
726 // top points to-----------------------^
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
727 // 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
728 char buf[maxlen];
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
729 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
730 // add one more component
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
731 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
732 char *x = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
733 if (x) hostname = x+1;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
734 *top = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
735 }
131
df355d117199 uribl lookups fully qualified; allow two component host names
carl
parents: 129
diff changeset
736 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
737 if (dns_interface(priv, buf, false, NULL)) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
738 if (debug_syslog > 2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
739 char tmp[maxlen];
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
740 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
741 my_syslog(tmp);
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
742 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
743 found = hostname;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
744 return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
745 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
746 return false;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
747 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
748
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
749
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
750 ////////////////////////////////////////////////
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
751 // uribl checker
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
752 // -------------
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
753 // hostname MUST not have a trailing dot
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
754 // If tld, two level lookup.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
755 // Else, look up three level domain.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
756 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
757 // 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
758 // 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
759 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
760 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
761 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) ;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
762 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
763 in_addr ip;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
764 if (inet_aton(hostname, &ip)) {
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
765 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
766 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
767 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
768 if ((src[0] == 192) && (src[1] == 168)) return false;
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
769 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
770 static char adr[sizeof "255.255.255.255"];
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
771 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
772 return (uriblookup(priv, adr, NULL, found));
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
773 }
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 char *top, *top2, *top3;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
776 top = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
777 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
778 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
779 top2 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
780 *top = '.';
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 if (top2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
783 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
784 string_set::iterator x = priv.memory->get_cctlds()->end();
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
785 // 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
786 if (i != x) return uriblookup(priv, hostname, top2, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
787
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
788 *top2 = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
789 top3 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
790 *top2 = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
791
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
792 // 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
793 if (top3 && uriblookup(priv, hostname, top2, found)) return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
794 // 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
795 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
796 // 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
797 return uriblookup(priv, hostname, top, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
798 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
799 return false;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
800 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
801
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
802
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
803 ////////////////////////////////////////////////
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
804 // check the hosts from the body against the content filter and uribl dnsbls
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
805 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
806 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
807 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
808 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
809 found = NULL; // normally ip address style
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
810 if (!priv.content_suffix && !priv.uribl_suffix) return false; // nothing to check
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
811 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
812 string_set &hosts = priv.memory->get_hosts();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
813 string_set &ignore = *priv.content_host_ignore;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
814
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
815 int count = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
816 int cnt = hosts.size(); // number of hosts we could look at
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
817 int_set ips;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
818 ns_map nameservers;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
819 for (string_set::iterator i=hosts.begin(); i!=hosts.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
820 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
821
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
822 // don't bother looking up hosts on the ignore list
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
823 string_set::iterator j = ignore.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
824 if (j != ignore.end()) continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
825
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
826 // 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
827 if ((cnt > limit) && (limit > 0) && random) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
828 int r = rand() % cnt;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
829 if (r >= limit) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
830 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
831 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
832 snprintf(buf, sizeof(buf), "host %s skipped", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
833 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
834 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
835 continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
836 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
837 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
838 count++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
839 ip = dns_interface(priv, host, true, &nameservers);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
840 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
841 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
842 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
843 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
844 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
845 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
846 snprintf(buf, sizeof(buf), "host %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
847 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
848 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
849 snprintf(buf, sizeof(buf), "host %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
850 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
851 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
852 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
853 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
854 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
855 if (i == ips.end()) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
856 // we haven't looked this up yet
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
857 ips.insert(ip);
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
858 // check dnsbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
859 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
860 msg = priv.content_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
861 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
862 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
863 // Check uribl & surbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
864 if (priv.uribl_suffix && check_uribl(priv, host, found)) {
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
865 msg = priv.uribl_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
866 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
867 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
868 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
869 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
870 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
871 limit *= 4; // allow average of 3 ns per host name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
872 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
873 count++;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
874 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
875 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
876 ip = (*i).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
877 if (!ip) ip = dns_interface(priv, host, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
878 if (debug_syslog > 2) {
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 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
881 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
882 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
883 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
884 snprintf(buf, sizeof(buf), "ns %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
885 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
886 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
887 snprintf(buf, sizeof(buf), "ns %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
888 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
889 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
890 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
891 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
892 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
893 if (i == ips.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
894 ips.insert(ip);
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
895 if (check_single(priv, ip, priv.content_suffix)) {
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
896 msg = priv.content_message;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
897 string_map::iterator j = nameservers.ns_host.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
898 if (j != nameservers.ns_host.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
899 char *refer = (*j).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
900 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
901 snprintf(buf, sizeof(buf), "%s with nameserver %s", refer, host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
902 host = register_string(hosts, buf); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
903 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
904 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
905 host = register_string(hosts, host); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
906 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
907 return true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
908 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
909 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
910 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
911 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
912 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
913 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
914
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
915
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
916 ////////////////////////////////////////////////
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
917 //
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
918 // 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
919 // enclosed in <>. I think older versions of sendmail supplied the <>
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
920 // 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
921 // 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
922 // 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
923 // to lower case.
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
924 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
925 char *to_lower_string(char *email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
926 char *to_lower_string(char *email) {
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
927 int n = strlen(email);
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
928 if (*email == '<') {
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
929 // assume it also ends with >
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
930 n -= 2;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
931 if (n < 1) return strdup(email); // return "<>"
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
932 email++;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
933 }
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
934 char *key = strdup(email);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
935 key[n] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
936 for (int i=0; i<n; i++) key[i] = tolower(key[i]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
937 return key;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
938 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
939
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
940
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
941 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
942 // start of sendmail milter interfaces
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
943 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
944 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
945 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
946 // allocate some private memory
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
947 mlfiPriv *priv = new mlfiPriv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
948 if (hostaddr->sa_family == AF_INET) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
949 priv->ip = ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
950 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
951 // save the private data
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
952 smfi_setpriv(ctx, (void*)priv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
953
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
954 // continue processing
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
955 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
956 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
957
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
958 sfsistat mlfi_helo(SMFICTX * ctx, char *helohost)
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
959 {
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
960 mlfiPriv &priv = *MLFIPRIV;
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
961 priv.helo = strdup(helohost);
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
962 return SMFIS_CONTINUE;
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
963 }
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
964
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
965 sfsistat mlfi_envfrom(SMFICTX *ctx, char **from)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
966 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
967 mlfiPriv &priv = *MLFIPRIV;
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carl
parents: 92
diff changeset
968 priv.mailaddr = to_lower_string(from[0]);
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
969 priv.queueid = strdup(smfi_getsymval(ctx, "i"));
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
970 priv.authenticated = smfi_getsymval(ctx, "{auth_authen}");
168
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
971 priv.client_name = smfi_getsymval(ctx, "_");
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
972 if (priv.authenticated) priv.authenticated = strdup(priv.authenticated);
168
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
973 if (priv.client_name) priv.client_name = strdup(priv.client_name);
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
974 if (spamc != spamc_empty) {
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
975 priv.assassin = new SpamAssassin(&priv, priv.ip, priv.helo, priv.mailaddr, priv.queueid);
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
976 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
977 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
978 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
979
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
980 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **rcpt)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
981 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
982 DNSBLP rejectlist = NULL; // list that caused the reject
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carl
parents: 92
diff changeset
983 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
984 CONFIG &dc = *priv.pc;
152
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
985 char *rcptaddr = rcpt[0];
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
986 char *loto = to_lower_string(rcptaddr);
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
987 if (priv.assassin) priv.assassin->mlfi_envrcpt(ctx, loto);
152
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carl
parents: 150
diff changeset
988 // priv.mailaddr sending original message to loto
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
989 CONTEXT &con = *(dc.find_context(loto)->find_context(priv.mailaddr));
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
990 VERIFYP ver = con.find_verify(loto);
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
991 char *fromvalue = con.find_from(priv.mailaddr);
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
992 // loto sending a reply back to priv.mailaddr
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
993 CONTEXT &con2 = *(dc.find_context(priv.mailaddr)->find_context(loto));
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
994 char *replyvalue = con2.find_from(loto);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
995 if (debug_syslog > 1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
996 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
997 char msg[maxlen];
156
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
998 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
999 my_syslog(&priv, msg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1000 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1001 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1002 status st;
152
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
1003 if (replyvalue == token_black) {
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
1004 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
1005 return SMFIS_REJECT;
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 150
diff changeset
1006 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1007 if (priv.authenticated) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1008 int c = incr_rcpt_count(priv.authenticated);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1009 int l = dc.default_context->find_rate(priv.authenticated);
142
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
1010 if (debug_syslog > 1) {
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
1011 char buf[maxlen];
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
1012 char msg[maxlen];
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
1013 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
1014 my_syslog(&priv, msg);
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
1015 }
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1016 if (c > l) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1017 smfi_setreply(ctx, "550", "5.7.1", "recipient rate limit exceeded");
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1018 return SMFIS_REJECT;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1019 }
142
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
1020 st = white;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1021 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1022 else if (fromvalue == token_black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1023 st = black;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1024 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1025 else if (fromvalue == token_white) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1026 st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1027 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1028 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1029 // check the dns based lists
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1030 st = (check_dnsbl(priv, con.get_dnsbl_list(), rejectlist)) ? reject : oksofar;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1031 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1032 if (st == reject) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1033 // reject the recipient based on some dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1034 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1035 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1036 inet_ntop(AF_INET, (const u_char *)&priv.ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1037 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1038 snprintf(buf, sizeof(buf), rejectlist->message, adr, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1039 smfi_setreply(ctx, "550", "5.7.1", buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1040 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1041 }
168
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1042 char *msg = con.generic_match(priv.client_name);
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1043 if (msg) {
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1044 // reject the recipient based on generic reverse dns
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1045 char buf[maxlen];
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1046 snprintf(buf, sizeof(buf), msg, priv.client_name);
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1047 smfi_setreply(ctx, "550", "5.7.1", buf);
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1048 return SMFIS_REJECT;
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
1049 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1050 if (st == black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1051 // reject the recipient based on blacklisting either from or to
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1052 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1053 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1054 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1055 if (ver && (st != white)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1056 // 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
1057 char *loto = to_lower_string(rcptaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1058 bool rc = ver->ok(priv.mailaddr, loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1059 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1060 if (!rc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1061 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1062 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1063 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1064 }
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1065 // we will accept the recipient, but add an auto-whitelist entry
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1066 // if needed to ensure we can accept replies
162
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 159
diff changeset
1067 loto = to_lower_string(rcptaddr);
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 159
diff changeset
1068 WHITELISTERP w = con2.find_autowhite(loto, priv.mailaddr);
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1069 if (w) {
156
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1070 if (debug_syslog > 1) {
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1071 char buf[maxlen];
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1072 char msg[maxlen];
159
ea7c57a4a2d1 add auto whitelisting
carl
parents: 156
diff changeset
1073 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
1074 my_syslog(&priv, msg);
a220bfb9211f add auto whitelisting
carl
parents: 154
diff changeset
1075 }
154
89ce226e5383 add auto whitelisting
carl
parents: 153
diff changeset
1076 w->sent(loto); // don't free it, the whitelister takes ownership of the string
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1077 }
162
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 159
diff changeset
1078 else {
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 159
diff changeset
1079 free(loto);
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 159
diff changeset
1080 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1081 // accept the recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1082 if (!con.get_content_filtering()) st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1083 if (st == oksofar) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1084 // but remember the non-whites
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1085 priv.need_content_filter(rcptaddr, con);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1086 priv.only_whites = false;
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1087 priv.want_spamassassin |= (priv.assassin) && // have spam assassin available and
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1088 (con.get_spamassassin_limit() != 0); // want to use it with a non-zero score
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1089 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1090 if (st == white) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1091 priv.have_whites = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1092 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1093 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1094 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1095
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1096 sfsistat mlfi_header(SMFICTX* ctx, char* headerf, char* headerv)
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1097 {
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1098 mlfiPriv &priv = *MLFIPRIV;
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1099 if (priv.authenticated) return SMFIS_CONTINUE;
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1100 if (priv.only_whites) return SMFIS_CONTINUE;
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1101 if (priv.want_spamassassin) priv.assassin->mlfi_header(headerf, headerv);
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1102 return SMFIS_CONTINUE;
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1103 }
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1104
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1105 sfsistat mlfi_eoh(SMFICTX* ctx)
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1106 {
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1107 mlfiPriv &priv = *MLFIPRIV;
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1108 if (priv.authenticated) return SMFIS_CONTINUE;
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1109 if (priv.only_whites) return SMFIS_CONTINUE;
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1110 if (priv.want_spamassassin) priv.assassin->mlfi_eoh();
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1111 return SMFIS_CONTINUE;
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1112 }
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1113
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1114 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1115 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1116 mlfiPriv &priv = *MLFIPRIV;
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1117 if (priv.authenticated) return SMFIS_CONTINUE;
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1118 if (priv.only_whites) return SMFIS_CONTINUE;
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1119 if (priv.want_spamassassin) priv.assassin->mlfi_body(data, len);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1120 priv.scanner->scan(data, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1121 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1122 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1123
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1124 sfsistat mlfi_eom(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1125 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1126 sfsistat rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1127 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1128 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1129 char *host = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1130 int ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1131 status st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1132 // process end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1133 if (priv.authenticated || priv.only_whites) rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1134 else {
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1135 int score = (priv.want_spamassassin) ? priv.assassin->mlfi_eom() : 0;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1136 // assert env_to not empty
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1137 char buf[maxlen];
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1138 string msg;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1139 string_set alive;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1140 bool random = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1141 int limit = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1142 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
1143 char *rcpt = (*i).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1144 CONTEXT &con = *((*i).second);
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1145 if (!con.acceptable_content(*priv.memory, score, msg)) {
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1146 // bad html tags or excessive hosts or high spam assassin score
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1147 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1148 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1149 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1150 alive.insert(rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1151 random |= con.get_host_random();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1152 limit = max(limit, con.get_host_limit());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1153 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1154 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1155 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
1156 if (!rejecting) {
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1157 char *fmt, *found;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1158 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
1159 if (found) {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1160 // uribl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1161 snprintf(buf, sizeof(buf), fmt, host, found);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1162 }
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1163 else {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1164 // dnsbl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1165 char adr[sizeof "255.255.255.255"];
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1166 adr[0] = '\0';
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1167 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
1168 snprintf(buf, sizeof(buf), fmt, host, adr);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1169 }
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1170 msg = string(buf);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1171 rejecting = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1172 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1173 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1174 if (!rejecting) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1175 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1176 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1177 else if (!priv.have_whites) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1178 // can reject the entire message
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1179 snprintf(buf, sizeof(buf), "%s", msg.c_str());
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 165
diff changeset
1180 smfi_setreply(ctx, "550", "5.7.1", buf);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1181 rc = SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1182 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1183 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1184 // need to accept it but remove the recipients that don't want it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1185 for (string_set::iterator i=alive.begin(); i!=alive.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1186 char *rcpt = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1187 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1188 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1189 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1190 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1191 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1192 // reset for a new message on the same connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1193 mlfi_abort(ctx);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1194 return rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1195 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1196
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1197 sfsistat mlfi_abort(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1198 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1199 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1200 priv.reset();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1201 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1202 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1203
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1204 sfsistat mlfi_close(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1205 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1206 mlfiPriv *priv = MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1207 if (!priv) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1208 delete priv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1209 smfi_setpriv(ctx, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1210 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1211 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1212
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1213 struct smfiDesc smfilter =
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1214 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1215 "DNSBL", // filter name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1216 SMFI_VERSION, // version code -- do not change
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1217 SMFIF_DELRCPT, // flags
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1218 mlfi_connect, // connection info filter
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1219 mlfi_helo, // SMTP HELO command filter
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1220 mlfi_envfrom, // envelope sender filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1221 mlfi_envrcpt, // envelope recipient filter
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1222 mlfi_header, // header filter
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1223 mlfi_eoh, // end of header
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1224 mlfi_body, // body block filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1225 mlfi_eom, // end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1226 mlfi_abort, // message aborted
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1227 mlfi_close, // connection cleanup
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1228 };
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1229
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1230
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1231 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1232 // reload the config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1233 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1234 CONFIG* new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1235 CONFIG* new_conf() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1236 CONFIG *newc = new CONFIG;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1237 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1238 newc->generation = generation++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1239 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1240 if (debug_syslog) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1241 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1242 snprintf(buf, sizeof(buf), "loading configuration generation %d", newc->generation);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1243 my_syslog(buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1244 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1245 if (load_conf(*newc, "dnsbl.conf")) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1246 newc->load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1247 return newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1248 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1249 delete newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1250 return NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1251 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1252
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1253
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1254 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1255 // thread to watch the old config files for changes
146
7278c9766e26 free old configs when last reference goes away
carl
parents: 143
diff changeset
1256 // and reload when needed.
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1257 // we also clear the SMTP AUTH recipient counts hourly
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1258 //
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1259 extern "C" {void* config_loader(void *arg);}
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1260 void* config_loader(void *arg) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1261 int loop = 0;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1262 while (loader_run) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1263 sleep(180); // look for modifications every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1264 if (!loader_run) break;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1265 loop++;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1266 if (loop == 20) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1267 // three minutes thru each loop, 20 loops per hour
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1268 // clear the recipient counts
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1269 pthread_mutex_lock(&rate_mutex);
138
9d0bc30b4576 add smtp auth rate limits
carl
parents: 137
diff changeset
1270 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
1271 (*i).second = 0;
138
9d0bc30b4576 add smtp auth rate limits
carl
parents: 137
diff changeset
1272 }
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1273 pthread_mutex_unlock(&rate_mutex);
137
a6190f7798f4 add smtp auth rate limits
carl
parents: 136
diff changeset
1274 loop = 0;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1275 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1276 CONFIG &dc = *config;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1277 time_t then = dc.load_time;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1278 struct stat st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1279 bool reload = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1280 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
1281 char *fn = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1282 if (stat(fn, &st)) reload = true; // file disappeared
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1283 else if (st.st_mtime > then) reload = true; // file modified
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1284 if (reload) break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1285 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1286 if (reload) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1287 CONFIG *newc = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1288 if (newc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1289 // replace the global config pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1290 pthread_mutex_lock(&config_mutex);
146
7278c9766e26 free old configs when last reference goes away
carl
parents: 143
diff changeset
1291 CONFIG *pc = config;
7278c9766e26 free old configs when last reference goes away
carl
parents: 143
diff changeset
1292 bool last = pc && (!pc->reference_count);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1293 config = newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1294 pthread_mutex_unlock(&config_mutex);
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
1295 if (last) delete pc; // there were no references to this config
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1296 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1297 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1298 // failed to load new config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1299 my_syslog("failed to load new configuration");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1300 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
1301 // update the load time on the current config to prevent complaining every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1302 dc.load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1303 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1304 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1305 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1306 return NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1307 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1308
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1309
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1310 void usage(char *prog);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1311 void usage(char *prog)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1312 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1313 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
1314 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
1315 fprintf(stderr, " and should be local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1316 fprintf(stderr, "where sm-sock-addr is for the connection to sendmail\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1317 fprintf(stderr, " and should be one of\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1318 fprintf(stderr, " inet:port@ip-address\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1319 fprintf(stderr, " local:local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1320 fprintf(stderr, "-c will load and dump the config to stdout\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1321 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
1322 fprintf(stderr, " in an infinte loop.\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1323 fprintf(stderr, "-d will set the syslog message level, currently 0 to 3\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1324 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
1325 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
1326 fprintf(stderr, " addresses in the argument to the -e switch\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1327 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1328
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1329
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1330
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1331 void setup_socket(char *sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1332 void setup_socket(char *sock) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1333 unlink(sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1334 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1335
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1336
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1337 /*
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1338 * The signal handler function -- only gets called when a SIGCHLD
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1339 * is received, ie when a child terminates
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1340 */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1341 void sig_chld(int signo)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1342 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1343 int status;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1344 /* Wait for any child without blocking */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1345 while (waitpid(-1, &status, WNOHANG) > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1346 // ignore child exit status, we only do this to cleanup zombies
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1347 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1348 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1349
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1350
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1351 int main(int argc, char**argv)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1352 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1353 token_init();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1354 bool check = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1355 bool stress = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1356 bool setconn = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1357 bool setreso = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1358 char *email = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1359 int c;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1360 const char *args = "r:p:t:e:d:chs";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1361 extern char *optarg;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1362
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1363 // Process command line options
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1364 while ((c = getopt(argc, argv, args)) != -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1365 switch (c) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1366 case 'r':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1367 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1368 fprintf(stderr, "Illegal resolver socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1369 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1370 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1371 resolver_port = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1372 setup_socket(resolver_port);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1373 setreso = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1374 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1375
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1376 case 'p':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1377 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1378 fprintf(stderr, "Illegal sendmail socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1379 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1380 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1381 if (smfi_setconn(optarg) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1382 fprintf(stderr, "smfi_setconn failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1383 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1384 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1385 if (strncasecmp(optarg, "unix:", 5) == 0) setup_socket(optarg + 5);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1386 else if (strncasecmp(optarg, "local:", 6) == 0) setup_socket(optarg + 6);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1387 setconn = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1388 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1389
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1390 case 't':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1391 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1392 fprintf(stderr, "Illegal timeout: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1393 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1394 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1395 if (smfi_settimeout(atoi(optarg)) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1396 fprintf(stderr, "smfi_settimeout failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1397 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1398 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1399 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1400
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1401 case 'e':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1402 if (email) free(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1403 email = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1404 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1405
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1406 case 'c':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1407 check = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1408 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1409
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1410 case 's':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1411 stress = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1412 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1413
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1414 case 'd':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1415 if (optarg == NULL || *optarg == '\0') debug_syslog = 1;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1416 else debug_syslog = atoi(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1417 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1418
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1419 case 'h':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1420 default:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1421 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1422 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1423 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1424 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1425
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1426 if (check) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1427 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1428 debug_syslog = 10;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1429 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1430 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1431 conf->dump();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1432 delete conf;
164
5809bcdc325b spamassassin changes
carl
parents: 163
diff changeset
1433 clear_strings(); // for valgrind checking
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1434 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1435 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1436 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1437 return 1; // config failed to load
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1438 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1439 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1440
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1441 if (stress) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1442 fprintf(stdout, "stress testing\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1443 while (1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1444 for (int i=0; i<10; i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1445 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1446 if (conf) delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1447 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1448 fprintf(stdout, ".");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1449 fflush(stdout);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1450 sleep(1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1451 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1452 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1453
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1454 if (email) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1455 char *x = strchr(email, '|');
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1456 if (x) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1457 *x = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1458 char *from = strdup(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1459 char *to = strdup(x+1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1460 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1461 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1462 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1463 CONTEXTP con = conf->find_context(to);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1464 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1465 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
1466 CONTEXTP fc = con->find_context(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1467 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
1468 char *st = fc->find_from(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1469 fprintf(stdout, "envelope from <%s> finds status %s\n", from, st);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1470 delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1471 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1472 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1473 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1474 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1475
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1476 if (!setconn) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1477 fprintf(stderr, "%s: Missing required -p argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1478 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1479 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1480 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1481
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1482 if (!setreso) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1483 fprintf(stderr, "%s: Missing required -r argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1484 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1485 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1486 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1487
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1488 if (smfi_register(smfilter) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1489 fprintf(stderr, "smfi_register failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1490 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1491 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1492
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1493 // switch to background mode
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1494 if (daemon(1,0) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1495 fprintf(stderr, "daemon() call failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1496 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1497 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1498
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1499 // write the pid
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1500 const char *pidpath = "/var/run/dnsbl.pid";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1501 unlink(pidpath);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1502 FILE *f = fopen(pidpath, "w");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1503 if (f) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1504 #ifdef linux
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1505 // from a comment in the DCC source code:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1506 // Linux threads are broken. Signals given the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1507 // original process are delivered to only the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1508 // thread that happens to have that PID. The
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1509 // sendmail libmilter thread that needs to hear
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1510 // SIGINT and other signals does not, and that breaks
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1511 // scripts that need to stop milters.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1512 // However, signaling the process group works.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1513 fprintf(f, "-%d\n", (u_int)getpgrp());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1514 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1515 fprintf(f, "%d\n", (u_int)getpid());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1516 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1517 fclose(f);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1518 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1519
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1520 // initialize the thread sync objects
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1521 pthread_mutex_init(&config_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1522 pthread_mutex_init(&syslog_mutex, 0);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1523 pthread_mutex_init(&resolve_mutex, 0);
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parents: 92
diff changeset
1524 pthread_mutex_init(&fd_pool_mutex, 0);
153
8d7c439bb6fa add auto whitelisting
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parents: 152
diff changeset
1525 pthread_mutex_init(&verifier_mutex, 0);
8d7c439bb6fa add auto whitelisting
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parents: 152
diff changeset
1526 pthread_mutex_init(&whitelister_mutex, 0);
94
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1527
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parents: 92
diff changeset
1528 // drop root privs
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parents: 92
diff changeset
1529 struct passwd *pw = getpwnam("dnsbl");
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parents: 92
diff changeset
1530 if (pw) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1531 if (setgid(pw->pw_gid) == -1) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1532 my_syslog("failed to switch to group dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1533 }
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1534 if (setuid(pw->pw_uid) == -1) {
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carl
parents: 92
diff changeset
1535 my_syslog("failed to switch to user dnsbl");
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parents: 92
diff changeset
1536 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1537 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1538
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1539 // load the initial config
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parents: 92
diff changeset
1540 config = new_conf();
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parents: 92
diff changeset
1541 if (!config) {
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parents: 92
diff changeset
1542 my_syslog("failed to load initial configuration, quitting");
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parents: 92
diff changeset
1543 exit(1);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1544 }
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parents: 92
diff changeset
1545
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parents: 92
diff changeset
1546 // fork off the resolver listener process
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parents: 92
diff changeset
1547 pid_t child = fork();
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parents: 92
diff changeset
1548 if (child < 0) {
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parents: 92
diff changeset
1549 my_syslog("failed to create resolver listener process");
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1550 exit(0);
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parents: 92
diff changeset
1551 }
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parents: 92
diff changeset
1552 if (child == 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1553 // we are the child - dns resolver listener process
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parents: 92
diff changeset
1554 resolver_socket = socket(AF_UNIX, SOCK_STREAM, 0);
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parents: 92
diff changeset
1555 if (resolver_socket < 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1556 my_syslog("child failed to create resolver socket");
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parents: 92
diff changeset
1557 exit(0); // failed
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parents: 92
diff changeset
1558 }
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parents: 92
diff changeset
1559 sockaddr_un server;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1560 memset(&server, '\0', sizeof(server));
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parents: 92
diff changeset
1561 server.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1562 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
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parents: 92
diff changeset
1563 //try to bind the address to the socket.
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parents: 92
diff changeset
1564 if (bind(resolver_socket, (sockaddr *)&server, sizeof(server)) < 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1565 // bind failed
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parents: 92
diff changeset
1566 shutdown(resolver_socket, SHUT_RDWR);
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parents: 92
diff changeset
1567 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1568 my_syslog("child failed to bind resolver socket");
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1569 exit(0); // failed
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parents: 92
diff changeset
1570 }
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carl
parents: 92
diff changeset
1571 //listen on the socket.
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parents: 92
diff changeset
1572 if (listen(resolver_socket, 10) < 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1573 // listen failed
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parents: 92
diff changeset
1574 shutdown(resolver_socket, SHUT_RDWR);
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parents: 92
diff changeset
1575 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1576 my_syslog("child failed to listen to resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1577 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1578 }
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carl
parents: 92
diff changeset
1579 // setup sigchld handler to prevent zombies
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carl
parents: 92
diff changeset
1580 struct sigaction act;
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parents: 92
diff changeset
1581 act.sa_handler = sig_chld; // Assign sig_chld as our SIGCHLD handler
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parents: 92
diff changeset
1582 sigemptyset(&act.sa_mask); // We don't want to block any other signals in this example
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parents: 92
diff changeset
1583 act.sa_flags = SA_NOCLDSTOP; // only want children that have terminated
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parents: 92
diff changeset
1584 if (sigaction(SIGCHLD, &act, NULL) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1585 my_syslog("child failed to setup SIGCHLD handler");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1586 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1587 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1588 while (true) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1589 sockaddr_un client;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1590 socklen_t clientlen = sizeof(client);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1591 int s = accept(resolver_socket, (sockaddr *)&client, &clientlen);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1592 if (s > 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1593 // accept worked, it did not get cancelled before we could accept it
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carl
parents: 92
diff changeset
1594 // fork off a process to handle this connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1595 int newchild = fork();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1596 if (newchild == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1597 // this is the worker process
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carl
parents: 92
diff changeset
1598 // child does not need the listening socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1599 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1600 process_resolver_requests(s);
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carl
parents: 92
diff changeset
1601 exit(0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1602 }
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carl
parents: 92
diff changeset
1603 else {
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parents: 92
diff changeset
1604 // this is the parent
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1605 // parent does not need the accepted socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1606 close(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1607 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1608 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1609 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1610 exit(0); // make sure we don't fall thru.
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carl
parents: 92
diff changeset
1611 }
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parents: 92
diff changeset
1612 else {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1613 sleep(2); // allow child to get started
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1614 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1615
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1616 // only create threads after the fork() in daemon
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1617 pthread_t tid;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1618 if (pthread_create(&tid, 0, config_loader, 0))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1619 my_syslog("failed to create config loader thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1620 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1621 my_syslog("failed to detach config loader thread");
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1622
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1623 if (pthread_create(&tid, 0, verify_closer, 0))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1624 my_syslog("failed to create verify closer thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1625 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1626 my_syslog("failed to detach verify closer thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1627
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1628 if (pthread_create(&tid, 0, whitelister_writer, 0))
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1629 my_syslog("failed to create autowhite writer thread");
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1630 if (pthread_detach(tid))
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1631 my_syslog("failed to detach autowhite writer thread");
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
1632
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1633 time_t starting = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1634 int rc = smfi_main();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1635 if ((rc != MI_SUCCESS) && (time(NULL) > starting+5*60)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1636 my_syslog("trying to restart after smfi_main()");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1637 loader_run = false; // eventually the config loader thread will terminate
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1638 execvp(argv[0], argv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1639 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1640 exit((rc == MI_SUCCESS) ? 0 : EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1641 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1642