annotate src/dnsbl.cpp @ 142:b82e00146672 stable-5-22

always log smth auth rate counts
author carl
date Thu, 28 Sep 2006 08:43:32 -0700
parents 4028de9b46dd
children ecb40aa3eaa5
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1 /*
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2
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3 Copyright (c) 2004, 2005 Carl Byington - 510 Software Group, released
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4 under the GPL version 2 or any later version at your choice available at
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5 http://www.fsf.org/licenses/gpl.txt
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6
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7 Based on a sample milter Copyright (c) 2000-2003 Sendmail, Inc. and its
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8 suppliers. Inspired by the DCC by Rhyolite Software
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9
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10 -r port The port used to talk to our internal dns resolver processes
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11 -p port The port through which the MTA will connect to this milter.
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12 -t sec The timeout value.
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13 -c Check the config, and print a copy to stdout. Don't start the
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14 milter or do anything with the socket.
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15 -s Stress test by loading and deleting the current config in a loop.
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16 -d increase debug level
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17 -e f|t Print the results of looking up from address f and to address
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18 t in the current config
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19
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20 */
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21
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22
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23 // from sendmail sample
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24 #include <sys/types.h>
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25 #include <sys/stat.h>
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26 #include <errno.h>
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27 #include <sysexits.h>
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28 #include <unistd.h>
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29
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30 // needed for socket io
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31 #include <sys/ioctl.h>
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32 #include <net/if.h>
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33 #include <arpa/inet.h>
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34 #include <netinet/in.h>
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35 #include <netinet/tcp.h>
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36 #include <netdb.h>
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37 #include <sys/socket.h>
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38 #include <sys/un.h>
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39
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40 // needed for thread
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41 #include <pthread.h>
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42
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43 // needed for std c++ collections
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44 #include <set>
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45 #include <map>
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46 #include <list>
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47
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48 // for the dns resolver
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49 #include <netinet/in.h>
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50 #include <arpa/nameser.h>
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51 #include <resolv.h>
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52
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53 // misc stuff needed here
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54 #include <ctype.h>
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55 #include <syslog.h>
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56 #include <pwd.h>
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57 #include <sys/wait.h> /* header for waitpid() and various macros */
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58 #include <signal.h> /* header for signal functions */
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59
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60 #include "includes.h"
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61
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62 static char* dnsbl_version="$Id$";
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63
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64
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65 extern "C" {
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66 #include "libmilter/mfapi.h"
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67 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr);
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68 sfsistat mlfi_envfrom(SMFICTX *ctx, char **argv);
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69 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **argv);
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70 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len);
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71 sfsistat mlfi_eom(SMFICTX *ctx);
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72 sfsistat mlfi_abort(SMFICTX *ctx);
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73 sfsistat mlfi_close(SMFICTX *ctx);
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74 void sig_chld(int signo);
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75 }
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76
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77 int debug_syslog = 0;
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78 bool syslog_opened = false;
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79 bool use_syslog = true; // false to printf
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80 bool loader_run = true; // used to stop the config loader thread
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81 CONFIG *config = NULL; // protected by the config_mutex
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82 int generation = 0; // protected by the config_mutex
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83 const int maxlen = 1000; // used for snprintf buffers
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84
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85 pthread_mutex_t config_mutex;
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86 pthread_mutex_t syslog_mutex;
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87 pthread_mutex_t resolve_mutex;
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88 pthread_mutex_t fd_pool_mutex;
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89 pthread_mutex_t rate_mutex;
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90
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91 std::set<int> fd_pool;
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92 int NULL_SOCKET = -1;
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93 const time_t ERROR_SOCKET_TIME = 60; // number of seconds between attempts to open a socket to the dns resolver process
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94 char *resolver_port = NULL; // unix domain socket to talk to the dns resolver process
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95 int resolver_socket = NULL_SOCKET; // socket used to listen for resolver requests
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96 time_t last_error_time;
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97 int resolver_sock_count = 0; // protected with fd_pool_mutex
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98 int resolver_pool_size = 0; // protected with fd_pool_mutex
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99 rcpt_rates rcpt_counts; // protected with rate_mutex
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100
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101
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102 struct ns_map {
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103 // all the strings are owned by the keys/values in the ns_host string map
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104 string_map ns_host; // nameserver name -> host name that uses this name server
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105 ns_mapper ns_ip; // nameserver name -> ip address of the name server
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106 ~ns_map();
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107 void add(char *name, char *refer);
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108 };
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109
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110
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111 ns_map::~ns_map() {
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112 for (string_map::iterator i=ns_host.begin(); i!=ns_host.end(); i++) {
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113 char *x = (*i).first;
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114 char *y = (*i).second;
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115 free(x);
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116 free(y);
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117 }
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118 ns_ip.clear();
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119 ns_host.clear();
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120 }
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121
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122
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123 void ns_map::add(char *name, char *refer) {
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124 string_map::iterator i = ns_host.find(name);
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125 if (i != ns_host.end()) return;
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126 char *x = strdup(name);
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127 char *y = strdup(refer);
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128 ns_ip[x] = 0;
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129 ns_host[x] = y;
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130
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131 }
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132
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133 // packed structure to allow a single socket write to dump the
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134 // length and the following answer. The packing attribute is gcc specific.
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135 struct glommer {
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136 int length;
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137 #ifdef NS_PACKETSZ
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138 u_char answer[NS_PACKETSZ*4]; // with a resolver, we return resolver answers
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139 #else
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140 int answer; // without a resolver, we return a single ip4 address, 0 == no answer
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141 #endif
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142 } __attribute__ ((packed));
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143
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144
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145 ////////////////////////////////////////////////
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146 // helper to manipulate recipient counts
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147 //
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148 int incr_rcpt_count(char *user);
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149 int incr_rcpt_count(char *user) {
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150 pthread_mutex_lock(&rate_mutex);
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151 rcpt_rates::iterator i = rcpt_counts.find(user);
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152 int c = 1;
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153 if (i == rcpt_counts.end()) {
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154 user = strdup(user);
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155 rcpt_counts[user] = c;
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156 }
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157 else {
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158 c = ++((*i).second);
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159 }
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160 pthread_mutex_unlock(&rate_mutex);
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161 return c;
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162 }
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163
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164 ////////////////////////////////////////////////
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165 // helper to discard the strings held by a context_map
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166 //
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167 void discard(context_map &cm);
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168 void discard(context_map &cm) {
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169 for (context_map::iterator i=cm.begin(); i!=cm.end(); i++) {
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170 char *x = (*i).first;
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171 free(x);
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172 }
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173 cm.clear();
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174 }
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175
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176
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177 ////////////////////////////////////////////////
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178 // helper to register a string in a context_map
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179 //
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180 void register_string(context_map &cm, char *name, CONTEXT *con);
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181 void register_string(context_map &cm, char *name, CONTEXT *con) {
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182 context_map::iterator i = cm.find(name);
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183 if (i != cm.end()) return;
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184 char *x = strdup(name);
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185 cm[x] = con;
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186 }
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187
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188
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189 ////////////////////////////////////////////////
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190 // disconnect the fd from the dns resolver process
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191 //
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192 void my_disconnect(int sock, bool decrement = true);
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193 void my_disconnect(int sock, bool decrement) {
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194 if (sock != NULL_SOCKET) {
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195 if (decrement) {
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196 pthread_mutex_lock(&fd_pool_mutex);
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197 resolver_sock_count--;
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198 pthread_mutex_unlock(&fd_pool_mutex);
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199 }
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200 shutdown(sock, SHUT_RDWR);
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201 close(sock);
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202 }
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203 }
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204
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205
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206 ////////////////////////////////////////////////
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207 // return fd connected to the dns resolver process
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208 //
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209 int my_connect();
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210 int my_connect() {
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211 // if we have had recent errors, don't even try to open the socket
129
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212 if ((time(NULL) - last_error_time) < ERROR_SOCKET_TIME) return NULL_SOCKET;
94
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213
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214 // nothing recent, maybe this time it will work
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215 int sock = NULL_SOCKET;
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216 sockaddr_un server;
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217 memset(&server, '\0', sizeof(server));
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218 server.sun_family = AF_UNIX;
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219 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
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220 sock = socket(AF_UNIX, SOCK_STREAM, 0);
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221 if (sock != NULL_SOCKET) {
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222 bool rc = (connect(sock, (sockaddr *)&server, sizeof(server)) == 0);
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223 if (!rc) {
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224 my_disconnect(sock, false);
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225 sock = NULL_SOCKET;
129
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226 last_error_time = time(NULL);
94
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227 }
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228 }
129
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229 else last_error_time = time(NULL);
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230 if (sock != NULL_SOCKET) {
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231 pthread_mutex_lock(&fd_pool_mutex);
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232 resolver_sock_count++;
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233 pthread_mutex_unlock(&fd_pool_mutex);
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234 }
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235 return sock;
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236 }
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237
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238
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239 mlfiPriv::mlfiPriv() {
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240 pthread_mutex_lock(&config_mutex);
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241 pc = config;
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242 pc->reference_count++;
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243 pthread_mutex_unlock(&config_mutex);
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244 get_fd();
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245 ip = 0;
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246 mailaddr = NULL;
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247 queueid = NULL;
136
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248 authenticated = NULL;
94
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249 have_whites = false;
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250 only_whites = true;
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251 memory = NULL;
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252 scanner = NULL;
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253 content_suffix = NULL;
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254 content_message = NULL;
119
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255 uribl_suffix = NULL;
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256 uribl_message = NULL;
94
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257 content_host_ignore = NULL;
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258 }
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259
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260 mlfiPriv::~mlfiPriv() {
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261 return_fd();
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262 pthread_mutex_lock(&config_mutex);
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263 pc->reference_count--;
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264 pthread_mutex_unlock(&config_mutex);
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265 reset(true);
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266 }
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267
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268 void mlfiPriv::reset(bool final) {
136
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269 if (mailaddr) free(mailaddr);
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270 if (queueid) free(queueid);
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271 if (authenticated) free(authenticated);
94
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272 discard(env_to);
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273 if (memory) delete memory;
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274 if (scanner) delete scanner;
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275 if (!final) {
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276 mailaddr = NULL;
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277 queueid = NULL;
136
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278 authenticated = NULL;
94
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279 have_whites = false;
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280 only_whites = true;
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281 memory = NULL;
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282 scanner = NULL;
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283 content_suffix = NULL;
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284 content_message = NULL;
119
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285 uribl_suffix = NULL;
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286 uribl_message = NULL;
94
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287 content_host_ignore = NULL;
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288 }
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289 }
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290
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291 void mlfiPriv::get_fd() {
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292 err = true;
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293 fd = NULL_SOCKET;
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294 int result = pthread_mutex_lock(&fd_pool_mutex);
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295 if (!result) {
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296 std::set<int>::iterator i;
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297 i = fd_pool.begin();
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298 if (i != fd_pool.end()) {
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299 // have at least one fd in the pool
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300 err = false;
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301 fd = *i;
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302 fd_pool.erase(fd);
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303 resolver_pool_size--;
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304 pthread_mutex_unlock(&fd_pool_mutex);
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305 }
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306 else {
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307 // pool is empty, get a new fd
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308 pthread_mutex_unlock(&fd_pool_mutex);
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309 fd = my_connect();
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310 err = (fd == NULL_SOCKET);
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311 }
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312 }
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313 else {
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314 // cannot lock the pool, just get a new fd
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315 fd = my_connect();
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316 err = (fd == NULL_SOCKET);
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317 }
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318 }
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319
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320 void mlfiPriv::return_fd() {
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321 if (err) {
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diff changeset
322 // this fd got a socket error, so close it, rather than returning it to the pool
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diff changeset
323 my_disconnect(fd);
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324 }
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325 else {
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326 int result = pthread_mutex_lock(&fd_pool_mutex);
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diff changeset
327 if (!result) {
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328 if ((resolver_sock_count > resolver_pool_size*5) || (resolver_pool_size < 5)) {
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329 // return the fd to the pool
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330 fd_pool.insert(fd);
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331 resolver_pool_size++;
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diff changeset
332 pthread_mutex_unlock(&fd_pool_mutex);
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333 }
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diff changeset
334 else {
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335 // more than 20% of the open resolver sockets are in the pool, and the
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diff changeset
336 // pool as at least 5 sockets. that is enough, so just close this one.
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337 pthread_mutex_unlock(&fd_pool_mutex);
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338 my_disconnect(fd);
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339 }
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340 }
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diff changeset
341 else {
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diff changeset
342 // could not lock the pool, so just close the fd
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diff changeset
343 my_disconnect(fd);
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344 }
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345 }
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diff changeset
346 }
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347
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diff changeset
348 int mlfiPriv::my_write(char *buf, int len) {
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349 if (err) return 0;
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350 int rs = 0;
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diff changeset
351 while (len) {
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352 int ws = write(fd, buf, len);
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diff changeset
353 if (ws > 0) {
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diff changeset
354 rs += ws;
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diff changeset
355 len -= ws;
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diff changeset
356 buf += ws;
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357 }
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diff changeset
358 else {
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359 // peer closed the socket!
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diff changeset
360 rs = 0;
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diff changeset
361 err = true;
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362 break;
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363 }
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364 }
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365 return rs;
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366 }
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367
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diff changeset
368 int mlfiPriv::my_read(char *buf, int len) {
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369 if (err) return 0;
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diff changeset
370 int rs = 0;
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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diff changeset
371 while (len) {
94
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diff changeset
372 int ws = read(fd, buf, len);
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diff changeset
373 if (ws > 0) {
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diff changeset
374 rs += ws;
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diff changeset
375 len -= ws;
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diff changeset
376 buf += ws;
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377 }
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diff changeset
378 else {
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diff changeset
379 // peer closed the socket!
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diff changeset
380 rs = 0;
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diff changeset
381 err = true;
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diff changeset
382 break;
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383 }
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diff changeset
384 }
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diff changeset
385 return rs;
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diff changeset
386 }
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diff changeset
387
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diff changeset
388 void mlfiPriv::need_content_filter(char *rcpt, CONTEXT &con) {
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diff changeset
389 register_string(env_to, rcpt, &con);
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diff changeset
390 if (!memory) {
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diff changeset
391 // first recipient that needs content filtering sets all
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diff changeset
392 // the content filtering parameters
117
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diff changeset
393 memory = new recorder(this, con.get_html_tags(), con.get_content_tlds(), con.get_content_cctlds());
94
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diff changeset
394 scanner = new url_scanner(memory);
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diff changeset
395 content_suffix = con.get_content_suffix();
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diff changeset
396 content_message = con.get_content_message();
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
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diff changeset
397 uribl_suffix = con.get_uribl_suffix();
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diff changeset
398 uribl_message = con.get_uribl_message();
94
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diff changeset
399 content_host_ignore = &con.get_content_host_ignore();
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diff changeset
400 }
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diff changeset
401 }
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diff changeset
402
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diff changeset
403 #define MLFIPRIV ((struct mlfiPriv *) smfi_getpriv(ctx))
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404
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diff changeset
405
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diff changeset
406 ////////////////////////////////////////////////
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407 // syslog a message
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diff changeset
408 //
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diff changeset
409 void my_syslog(mlfiPriv *priv, char *text) {
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410 char buf[maxlen];
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parents: 92
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411 if (priv) {
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412 snprintf(buf, sizeof(buf), "%s: %s", priv->queueid, text);
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413 text = buf;
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414 }
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415 if (use_syslog) {
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416 pthread_mutex_lock(&syslog_mutex);
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parents: 92
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417 if (!syslog_opened) {
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diff changeset
418 openlog("dnsbl", LOG_PID, LOG_MAIL);
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419 syslog_opened = true;
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420 }
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diff changeset
421 syslog(LOG_NOTICE, "%s", text);
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diff changeset
422 pthread_mutex_unlock(&syslog_mutex);
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423 }
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diff changeset
424 else {
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425 printf("%s \n", text);
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426 }
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427 }
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428
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diff changeset
429 void my_syslog(char *text) {
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430 my_syslog(NULL, text);
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431 }
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432
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433
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diff changeset
434 ////////////////////////////////////////////////
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435 // read a resolver request from the socket, process it, and
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parents: 92
diff changeset
436 // write the result back to the socket.
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437
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diff changeset
438 void process_resolver_requests(int socket);
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439 void process_resolver_requests(int socket) {
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440 #ifdef NS_MAXDNAME
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441 char question[NS_MAXDNAME];
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442 #else
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443 char question[1000];
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444 #endif
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diff changeset
445 glommer glom;
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446
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diff changeset
447 int maxq = sizeof(question);
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diff changeset
448 while (true) {
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449 // read a question
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450 int rs = 0;
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diff changeset
451 while (rs < maxq) {
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diff changeset
452 int ns = read(socket, question+rs, maxq-rs);
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453 if (ns > 0) {
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454 rs += ns;
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455 if (question[rs-1] == '\0') {
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456 // last byte read was the null terminator, we are done
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457 break;
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458 }
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459 }
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460 else {
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461 // peer closed the socket
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462 #ifdef RESOLVER_DEBUG
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463 my_syslog("process_resolver_requests() peer closed socket while reading question");
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464 #endif
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465 shutdown(socket, SHUT_RDWR);
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466 close(socket);
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467 return;
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468 }
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469 }
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470 question[rs-1] = '\0'; // ensure null termination
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471
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472 // find the answer
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473 #ifdef NS_PACKETSZ
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474 #ifdef RESOLVER_DEBUG
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475 char text[1000];
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diff changeset
476 snprintf(text, sizeof(text), "process_resolver_requests() has a question %s", question);
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diff changeset
477 my_syslog(text);
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478 #endif
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diff changeset
479 glom.length = res_search(question, ns_c_in, ns_t_a, glom.answer, sizeof(glom.answer));
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diff changeset
480 if (glom.length < 0) glom.length = 0; // represent all errors as zero length answers
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481 #else
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diff changeset
482 glom.length = sizeof(glom.answer);
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diff changeset
483 glom.answer = 0;
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parents: 92
diff changeset
484 struct hostent *host = gethostbyname(question);
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parents: 92
diff changeset
485 if (host && (host->h_addrtype == AF_INET)) {
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parents: 92
diff changeset
486 memcpy(&glom.answer, host->h_addr, sizeof(glom.answer));
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487 }
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diff changeset
488 #endif
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489
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diff changeset
490 // write the answer
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diff changeset
491 char *buf = (char *)&glom;
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diff changeset
492 int len = glom.length + sizeof(glom.length);
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diff changeset
493 #ifdef RESOLVER_DEBUG
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diff changeset
494 snprintf(text, sizeof(text), "process_resolver_requests() writing answer length %d for total %d", glom.length, len);
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parents: 92
diff changeset
495 my_syslog(text);
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496 #endif
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497 int ws = 0;
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diff changeset
498 while (len > ws) {
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499 int ns = write(socket, buf+ws, len-ws);
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500 if (ns > 0) {
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501 ws += ns;
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diff changeset
502 }
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503 else {
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parents: 92
diff changeset
504 // peer closed the socket!
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parents: 92
diff changeset
505 #ifdef RESOLVER_DEBUG
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506 my_syslog("process_resolver_requests() peer closed socket while writing answer");
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parents: 92
diff changeset
507 #endif
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508 shutdown(socket, SHUT_RDWR);
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509 close(socket);
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510 return;
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diff changeset
511 }
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diff changeset
512 }
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513 }
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514 }
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diff changeset
515
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516
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diff changeset
517 ////////////////////////////////////////////////
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518 // ask a dns question and get an A record answer - we don't try
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diff changeset
519 // very hard, just using the default resolver retry settings.
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parents: 92
diff changeset
520 // If we cannot get an answer, we just accept the mail.
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diff changeset
521 //
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diff changeset
522 //
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diff changeset
523 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers);
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parents: 92
diff changeset
524 int dns_interface(mlfiPriv &priv, char *question, bool maybe_ip, ns_map *nameservers) {
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parents: 92
diff changeset
525 // this part can be done without locking the resolver mutex. Each
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parents: 92
diff changeset
526 // milter thread is talking over its own socket to a separate resolver
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diff changeset
527 // process, which does the actual dns resolution.
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parents: 92
diff changeset
528 if (priv.err) return 0; // cannot ask more questions on this socket.
134
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parents: 132
diff changeset
529 if (maybe_ip) {
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parents: 132
diff changeset
530 // might be a bare ip address, try this first to avoid dns lookups that may not be needed
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parents: 132
diff changeset
531 in_addr ip;
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parents: 132
diff changeset
532 if (inet_aton(question, &ip)) {
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parents: 132
diff changeset
533 return (int)ip.s_addr;
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diff changeset
534 }
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parents: 132
diff changeset
535 }
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parents: 132
diff changeset
536 int n = strlen(question);
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parents: 132
diff changeset
537 if (question[n-1] == '.') {
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parents: 132
diff changeset
538 priv.my_write(question, n+1); // write the question including the null terminator
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parents: 132
diff changeset
539 }
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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parents: 132
diff changeset
540 else {
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parents: 132
diff changeset
541 priv.my_write(question, n); // write the question
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
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parents: 132
diff changeset
542 priv.my_write(".", 2); // and the fully qualified . terminator and null string terminator
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parents: 132
diff changeset
543 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
544 glommer glom;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
545 char *buf = (char *)&glom;
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parents: 92
diff changeset
546 priv.my_read(buf, sizeof(glom.length));
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parents: 92
diff changeset
547 buf += sizeof(glom.length);
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
548 #ifdef RESOLVER_DEBUG
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parents: 92
diff changeset
549 char text[1000];
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
550 snprintf(text, sizeof(text), "dns_interface() wrote question %s and has answer length %d", question, glom.length);
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carl
parents: 92
diff changeset
551 my_syslog(text);
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parents: 92
diff changeset
552 #endif
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carl
parents: 92
diff changeset
553 if ((glom.length < 0) || (glom.length > sizeof(glom.answer))) {
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carl
parents: 92
diff changeset
554 priv.err = true;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
555 return 0; // cannot process overlarge answers
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
556 }
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parents: 92
diff changeset
557 priv.my_read(buf, glom.length);
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parents: 92
diff changeset
558
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
559 #ifdef NS_PACKETSZ
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parents: 92
diff changeset
560 // now we need to lock the resolver mutex to keep the milter threads from
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
561 // stepping on each other while parsing the dns answer.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
562 int ret_address = 0;
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parents: 92
diff changeset
563 pthread_mutex_lock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
564 if (glom.length > 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
565 // parse the answer
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carl
parents: 92
diff changeset
566 ns_msg handle;
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carl
parents: 92
diff changeset
567 ns_rr rr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
568 if (ns_initparse(glom.answer, glom.length, &handle) == 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
569 // look for ns names
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
570 if (nameservers) {
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parents: 92
diff changeset
571 ns_map &ns = *nameservers;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
572 int rrnum = 0;
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parents: 92
diff changeset
573 while (ns_parserr(&handle, ns_s_ns, rrnum++, &rr) == 0) {
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carl
parents: 92
diff changeset
574 if (ns_rr_type(rr) == ns_t_ns) {
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carl
parents: 92
diff changeset
575 char nam[NS_MAXDNAME+1];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
576 char *n = nam;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
577 const u_char *p = ns_rr_rdata(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
578 while (((n-nam) < NS_MAXDNAME) && ((p-glom.answer) < glom.length) && *p) {
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carl
parents: 92
diff changeset
579 size_t s = *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
580 if (s > 191) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
581 // compression pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
582 s = (s-192)*256 + *(p++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
583 if (s >= glom.length) break; // pointer outside bounds of answer
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
584 p = glom.answer + s;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
585 s = *(p++);
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carl
parents: 92
diff changeset
586 }
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carl
parents: 92
diff changeset
587 if (s > 0) {
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
588 if ((n-nam) >= (NS_MAXDNAME-s)) break; // destination would overflow name buffer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
589 if ((p-glom.answer) >= (glom.length-s)) break; // source outside bounds of answer
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carl
parents: 92
diff changeset
590 memcpy(n, p, s);
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parents: 92
diff changeset
591 n += s;
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
592 p += s;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
593 *(n++) = '.';
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parents: 92
diff changeset
594 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
595 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
596 if (n-nam) n--; // remove trailing .
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
597 *n = '\0'; // null terminate it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
598 ns.add(nam, question); // ns host to lookup later
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carl
parents: 92
diff changeset
599 }
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
600 }
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carl
parents: 92
diff changeset
601 rrnum = 0;
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carl
parents: 92
diff changeset
602 while (ns_parserr(&handle, ns_s_ar, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
603 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
604 char* nam = (char*)ns_rr_name(rr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
605 ns_mapper::iterator i = ns.ns_ip.find(nam);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
606 if (i != ns.ns_ip.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
607 // we want this ip address
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
608 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
609 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
610 ns.ns_ip[nam] = address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
611 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
612 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
613 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
614 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
615 int rrnum = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
616 while (ns_parserr(&handle, ns_s_an, rrnum++, &rr) == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
617 if (ns_rr_type(rr) == ns_t_a) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
618 int address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
619 memcpy(&address, ns_rr_rdata(rr), sizeof(address));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
620 ret_address = address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
621 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
622 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
623 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
624 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
625 pthread_mutex_unlock(&resolve_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
626 return ret_address;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
627 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
628 return glom.answer;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
629 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
630 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
631
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
632
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
633 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
634 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
635 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
636 bool check_single(mlfiPriv &priv, int ip, char *suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
637 bool check_single(mlfiPriv &priv, int ip, char *suffix) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
638 // make a dns question
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
639 const u_char *src = (const u_char *)&ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
640 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
641 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
642 if ((src[0] == 192) && (src[1] == 168)) return false;
05ae49d37896 don't do dnsbl lookups on rfc1918 address space
carl
parents: 124
diff changeset
643 if ((src[0] == 172) && (16 <= src[1]) && (src[1] <= 31)) return false;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
644 #ifdef NS_MAXDNAME
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
645 char question[NS_MAXDNAME];
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carl
parents: 92
diff changeset
646 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
647 char question[1000];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
648 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
649 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
650 // 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
651 return dns_interface(priv, question, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
652 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
653
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
654
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
655 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
656 // check a single dnsbl
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
657 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
658 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
659 bool check_single(mlfiPriv &priv, int ip, DNSBL &bl) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
660 return check_single(priv, ip, bl.suffix);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
661 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
662
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
663
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
664 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
665 // check the dnsbls specified for this recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
666 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
667 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
668 bool check_dnsbl(mlfiPriv &priv, dnsblp_list &dnsbll, DNSBLP &rejectlist) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
669 for (dnsblp_list::iterator i=dnsbll.begin(); i!=dnsbll.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
670 DNSBLP dp = *i; // non null by construction
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
671 bool st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
672 map<DNSBLP, bool>::iterator f = priv.checked.find(dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
673 if (f == priv.checked.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
674 // have not checked this list yet
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
675 st = check_single(priv, priv.ip, *dp);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
676 rejectlist = dp;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
677 priv.checked[dp] = st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
678 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
679 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
680 st = (*f).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
681 rejectlist = (*f).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
682 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
683 if (st) return st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
684 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
685 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
686 }
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 ////////////////////////////////////////////////
134
f9917ce924a3 all dns lookups fully qualified, my_read() bug fix
carl
parents: 132
diff changeset
690 // 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
691 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
692 // 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
693 // 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
694 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
695 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
696 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
697 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
698 // 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
699 // so for hostname of www.fred.mydomain.co.uk
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
700 // top points to-----------------------^
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
701 // 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
702 char buf[maxlen];
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
703 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
704 // add one more component
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
705 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
706 char *x = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
707 if (x) hostname = x+1;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
708 *top = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
709 }
131
df355d117199 uribl lookups fully qualified; allow two component host names
carl
parents: 129
diff changeset
710 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
711 if (dns_interface(priv, buf, false, NULL)) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
712 if (debug_syslog > 2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
713 char tmp[maxlen];
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
714 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
715 my_syslog(tmp);
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
716 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
717 found = hostname;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
718 return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
719 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
720 return false;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
721 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
722
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
723
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
724 ////////////////////////////////////////////////
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
725 // uribl checker
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
726 // -------------
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
727 // hostname MUST not have a trailing dot
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
728 // If tld, two level lookup.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
729 // Else, look up three level domain.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
730 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
731 // 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
732 // 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
733 // otherwise, return false and preserve the value of found.
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
734 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
735 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) ;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
736 bool check_uribl(mlfiPriv &priv, char *hostname, char *&found) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
737 in_addr ip;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
738 if (inet_aton(hostname, &ip)) {
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
739 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
740 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
741 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
742 if ((src[0] == 192) && (src[1] == 168)) return false;
9ab51896447f don't do uribl lookups on rfc1918 address space
carl
parents: 127
diff changeset
743 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
744 static char adr[sizeof "255.255.255.255"];
120
1d9e6c1b8872 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 119
diff changeset
745 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
746 return (uriblookup(priv, adr, NULL, found));
117
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 char *top, *top2, *top3;
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
750 top = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
751 if (top) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
752 *top = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
753 top2 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
754 *top = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
755
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
756 if (top2) {
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
757 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
758 string_set::iterator x = priv.memory->get_cctlds()->end();
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
759 // 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
760 if (i != x) return uriblookup(priv, hostname, top2, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
761
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
762 *top2 = '\0';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
763 top3 = strrchr(hostname, '.');
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
764 *top2 = '.';
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
765
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
766 // 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
767 if (top3 && uriblookup(priv, hostname, top2, found)) return true;
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
768 // 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
769 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
770 // 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
771 return uriblookup(priv, hostname, top, found);
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
772 }
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
773 return false;
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
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
776
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
777 ////////////////////////////////////////////////
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
778 // check the hosts from the body against the content filter and uribl dnsbls
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
779 //
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
780 //
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
781 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
782 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
783 found = NULL; // normally ip address style
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
784 if (!priv.content_suffix && !priv.uribl_suffix) return false; // nothing to check
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
785 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
786 string_set &hosts = priv.memory->get_hosts();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
787 string_set &ignore = *priv.content_host_ignore;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
788
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
789 int count = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
790 int cnt = hosts.size(); // number of hosts we could look at
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
791 int_set ips;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
792 ns_map nameservers;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
793 for (string_set::iterator i=hosts.begin(); i!=hosts.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
794 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
795
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
796 // don't bother looking up hosts on the ignore list
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
797 string_set::iterator j = ignore.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
798 if (j != ignore.end()) continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
799
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
800 // 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
801 if ((cnt > limit) && (limit > 0) && random) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
802 int r = rand() % cnt;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
803 if (r >= limit) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
804 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
805 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
806 snprintf(buf, sizeof(buf), "host %s skipped", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
807 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
808 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
809 continue;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
810 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
811 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
812 count++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
813 ip = dns_interface(priv, host, true, &nameservers);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
814 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
815 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
816 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
817 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
818 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
819 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
820 snprintf(buf, sizeof(buf), "host %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
821 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
822 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
823 snprintf(buf, sizeof(buf), "host %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
824 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
825 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
826 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
827 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
828 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
829 if (i == ips.end()) {
117
aa07452e641b uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
830 // we haven't looked this up yet
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
831 ips.insert(ip);
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
832 // check dnsbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
833 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
834 msg = priv.content_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
835 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
836 }
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
837 // Check uribl & surbl style list
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
838 if (priv.uribl_suffix && check_uribl(priv, host, found)) {
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
839 msg = priv.uribl_message;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
840 return true;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
841 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
842 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
843 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
844 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
845 limit *= 4; // allow average of 3 ns per host name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
846 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
847 count++;
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
848 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
849 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
850 ip = (*i).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
851 if (!ip) ip = dns_interface(priv, host, false, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
852 if (debug_syslog > 2) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
853 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
854 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
855 char adr[sizeof "255.255.255.255"];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
856 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
857 inet_ntop(AF_INET, (const u_char *)&ip, adr, sizeof(adr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
858 snprintf(buf, sizeof(buf), "ns %s found at %s", host, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
859 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
860 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
861 snprintf(buf, sizeof(buf), "ns %s not found", host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
862 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
863 my_syslog(&priv, buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
864 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
865 if (ip) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
866 int_set::iterator i = ips.find(ip);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
867 if (i == ips.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
868 ips.insert(ip);
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
869 if (check_single(priv, ip, priv.content_suffix)) {
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 117
diff changeset
870 msg = priv.content_message;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
871 string_map::iterator j = nameservers.ns_host.find(host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
872 if (j != nameservers.ns_host.end()) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
873 char *refer = (*j).second;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
874 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
875 snprintf(buf, sizeof(buf), "%s with nameserver %s", refer, host);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
876 host = register_string(hosts, buf); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
877 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
878 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
879 host = register_string(hosts, host); // put a copy into hosts, and return that reference
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
880 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
881 return true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
882 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
883 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
884 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
885 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
886 return false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
887 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
888
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
889
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
890 ////////////////////////////////////////////////
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
891 //
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
892 // 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
893 // enclosed in <>. I think older versions of sendmail supplied the <>
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
894 // 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
895 // 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
896 // 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
897 // to lower case.
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
898 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
899 char *to_lower_string(char *email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
900 char *to_lower_string(char *email) {
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
901 int n = strlen(email);
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
902 if (*email == '<') {
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
903 // assume it also ends with >
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
904 n -= 2;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
905 if (n < 1) return strdup(email); // return "<>"
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
906 email++;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
907 }
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 126
diff changeset
908 char *key = strdup(email);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
909 key[n] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
910 for (int i=0; i<n; i++) key[i] = tolower(key[i]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
911 return key;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
912 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
913
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
914
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
915 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
916 // start of sendmail milter interfaces
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
917 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
918 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
919 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
920 // allocate some private memory
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
921 mlfiPriv *priv = new mlfiPriv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
922 if (hostaddr->sa_family == AF_INET) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
923 priv->ip = ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
924 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
925
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
926 // save the private data
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
927 smfi_setpriv(ctx, (void*)priv);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
928
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
929 // continue processing
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
930 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
931 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
932
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
933 sfsistat mlfi_envfrom(SMFICTX *ctx, char **from)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
934 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
935 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
936 priv.mailaddr = to_lower_string(from[0]);
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
937 priv.authenticated = smfi_getsymval(ctx, "{auth_authen}");
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
938 if (priv.authenticated) priv.authenticated = strdup(priv.authenticated);
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
939 return SMFIS_CONTINUE;
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 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **rcpt)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
943 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
944 DNSBLP rejectlist = NULL; // list that caused the reject
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
945 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
946 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
947 if (!priv.queueid) priv.queueid = strdup(smfi_getsymval(ctx, "i"));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
948 char *rcptaddr = rcpt[0];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
949 char *loto = to_lower_string(rcptaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
950 CONTEXT &con = *(dc.find_context(loto)->find_context(priv.mailaddr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
951 VERIFYP ver = con.find_verify(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
952 if (debug_syslog > 1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
953 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
954 char msg[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
955 snprintf(msg, sizeof(msg), "from <%s> to <%s> using context %s", priv.mailaddr, loto, con.get_full_name(buf,maxlen));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
956 my_syslog(&priv, msg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
957 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
958 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
959 char *fromvalue = con.find_from(priv.mailaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
960 status st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
961 if (priv.authenticated) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
962 int c = incr_rcpt_count(priv.authenticated);
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
963 int l = dc.default_context->find_rate(priv.authenticated);
142
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
964 if (debug_syslog > 1) {
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
965 char buf[maxlen];
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
966 char msg[maxlen];
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
967 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
968 my_syslog(&priv, msg);
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
969 }
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
970 if (c > l) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
971 smfi_setreply(ctx, "550", "5.7.1", "recipient rate limit exceeded");
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
972 return SMFIS_REJECT;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
973 }
142
b82e00146672 always log smth auth rate counts
carl
parents: 140
diff changeset
974 st = white;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
975 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
976 else if (fromvalue == token_black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
977 st = black;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
978 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
979 else if (fromvalue == token_white) {
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carl
parents: 92
diff changeset
980 st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
981 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
982 else {
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carl
parents: 92
diff changeset
983 // check the dns based lists
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
984 st = (check_dnsbl(priv, con.get_dnsbl_list(), rejectlist)) ? reject : oksofar;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
985 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
986 if (st == reject) {
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carl
parents: 92
diff changeset
987 // reject the recipient based on some dnsbl
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carl
parents: 92
diff changeset
988 char adr[sizeof "255.255.255.255"];
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carl
parents: 92
diff changeset
989 adr[0] = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
990 inet_ntop(AF_INET, (const u_char *)&priv.ip, adr, sizeof(adr));
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carl
parents: 92
diff changeset
991 char buf[maxlen];
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carl
parents: 92
diff changeset
992 snprintf(buf, sizeof(buf), rejectlist->message, adr, adr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
993 smfi_setreply(ctx, "550", "5.7.1", buf);
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carl
parents: 92
diff changeset
994 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
995 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
996 if (st == black) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
997 // reject the recipient based on blacklisting either from or to
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
998 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
999 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1000 }
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carl
parents: 92
diff changeset
1001 if (ver && (st != white)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1002 // 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
1003 char *loto = to_lower_string(rcptaddr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1004 bool rc = ver->ok(priv.mailaddr, loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1005 free(loto);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1006 if (!rc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1007 smfi_setreply(ctx, "550", "5.7.1", "no such user");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1008 return SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1009 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1010 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1011 // accept the recipient
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1012 if (!con.get_content_filtering()) st = white;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1013 if (st == oksofar) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1014 // but remember the non-whites
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1015 priv.need_content_filter(rcptaddr, con);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1016 priv.only_whites = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1017 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1018 if (st == white) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1019 priv.have_whites = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1020 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1021 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1022 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1023
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1024 sfsistat mlfi_body(SMFICTX *ctx, u_char *data, size_t len)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1025 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1026 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1027 if (priv.authenticated) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1028 if (priv.only_whites) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1029 priv.scanner->scan(data, len);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1030 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1031 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1032
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1033 sfsistat mlfi_eom(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1034 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1035 sfsistat rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1036 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1037 CONFIG &dc = *priv.pc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1038 char *host = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1039 int ip;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1040 status st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1041 // process end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1042 if (priv.authenticated || priv.only_whites) rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1043 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1044 // assert env_to not empty
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1045 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1046 char *msg = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1047 string_set alive;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1048 bool random = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1049 int limit = 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1050 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
1051 char *rcpt = (*i).first;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1052 CONTEXT &con = *((*i).second);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1053 if (!con.acceptable_content(*priv.memory, msg)) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1054 // bad html tags or excessive hosts
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1055 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1056 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1057 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1058 alive.insert(rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1059 random |= con.get_host_random();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1060 limit = max(limit, con.get_host_limit());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1061 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1062 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1063 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
1064 if (!rejecting) {
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1065 char *fmt, *found;
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1066 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
1067 if (found) {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1068 // uribl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1069 snprintf(buf, sizeof(buf), fmt, host, found);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1070 }
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1071 else {
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1072 // dnsbl style
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1073 char adr[sizeof "255.255.255.255"];
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1074 adr[0] = '\0';
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1075 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
1076 snprintf(buf, sizeof(buf), fmt, host, adr);
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 123
diff changeset
1077 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1078 msg = buf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1079 rejecting = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1080 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1081 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1082 if (!rejecting) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1083 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1084 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1085 else if (!priv.have_whites) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1086 // can reject the entire message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1087 smfi_setreply(ctx, "550", "5.7.1", msg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1088 rc = SMFIS_REJECT;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1089 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1090 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1091 // need to accept it but remove the recipients that don't want it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1092 for (string_set::iterator i=alive.begin(); i!=alive.end(); i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1093 char *rcpt = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1094 smfi_delrcpt(ctx, rcpt);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1095 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1096 rc = SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1097 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1098 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1099 // reset for a new message on the same connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1100 mlfi_abort(ctx);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1101 return rc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1102 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1103
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1104 sfsistat mlfi_abort(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1105 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1106 mlfiPriv &priv = *MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1107 priv.reset();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1108 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1109 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1110
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1111 sfsistat mlfi_close(SMFICTX *ctx)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1112 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1113 mlfiPriv *priv = MLFIPRIV;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1114 if (!priv) return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1115 delete priv;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1116 smfi_setpriv(ctx, NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1117 return SMFIS_CONTINUE;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1118 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1119
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1120 struct smfiDesc smfilter =
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1121 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1122 "DNSBL", // filter name
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1123 SMFI_VERSION, // version code -- do not change
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1124 SMFIF_DELRCPT, // flags
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1125 mlfi_connect, // connection info filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1126 NULL, // SMTP HELO command filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1127 mlfi_envfrom, // envelope sender filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1128 mlfi_envrcpt, // envelope recipient filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1129 NULL, // header filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1130 NULL, // end of header
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1131 mlfi_body, // body block filter
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1132 mlfi_eom, // end of message
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1133 mlfi_abort, // message aborted
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1134 mlfi_close, // connection cleanup
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1135 };
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1136
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1137
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1138 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1139 // reload the config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1140 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1141 CONFIG* new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1142 CONFIG* new_conf() {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1143 CONFIG *newc = new CONFIG;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1144 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1145 newc->generation = generation++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1146 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1147 if (debug_syslog) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1148 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1149 snprintf(buf, sizeof(buf), "loading configuration generation %d", newc->generation);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1150 my_syslog(buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1151 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1152 if (load_conf(*newc, "dnsbl.conf")) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1153 newc->load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1154 return newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1155 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1156 delete newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1157 return NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1158 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1159
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1160
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1161 ////////////////////////////////////////////////
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1162 // thread to watch the old config files for changes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1163 // and reload when needed. we also cleanup old
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1164 // configs whose reference count has gone to zero.
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1165 // we also clear the SMTP AUTH recipient counts hourly
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1166 //
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1167 void* config_loader(void *arg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1168 void* config_loader(void *arg) {
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1169 int loop = 0;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1170 typedef set<CONFIG *> configp_set;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1171 configp_set old_configs;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1172 while (loader_run) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1173 sleep(180); // look for modifications every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1174 if (!loader_run) break;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1175 loop++;
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1176 if (loop == 20) {
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1177 // three minutes thru each loop, 20 loops per hour
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1178 // clear the recipient counts
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1179 pthread_mutex_lock(&rate_mutex);
138
9d0bc30b4576 add smtp auth rate limits
carl
parents: 137
diff changeset
1180 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
1181 (*i).second = 0;
138
9d0bc30b4576 add smtp auth rate limits
carl
parents: 137
diff changeset
1182 }
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1183 pthread_mutex_unlock(&rate_mutex);
137
a6190f7798f4 add smtp auth rate limits
carl
parents: 136
diff changeset
1184 loop = 0;
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 134
diff changeset
1185 }
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1186 CONFIG &dc = *config;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1187 time_t then = dc.load_time;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1188 struct stat st;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1189 bool reload = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1190 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
1191 char *fn = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1192 if (stat(fn, &st)) reload = true; // file disappeared
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1193 else if (st.st_mtime > then) reload = true; // file modified
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1194 if (reload) break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1195 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1196 if (reload) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1197 CONFIG *newc = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1198 if (newc) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1199 // replace the global config pointer
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1200 pthread_mutex_lock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1201 CONFIG *old = config;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1202 config = newc;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1203 pthread_mutex_unlock(&config_mutex);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1204 if (old) old_configs.insert(old);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1205 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1206 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1207 // failed to load new config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1208 my_syslog("failed to load new configuration");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1209 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
1210 // update the load time on the current config to prevent complaining every 3 minutes
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1211 dc.load_time = time(NULL);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1212 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1213 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1214 // now look for old configs with zero ref counts
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1215 for (configp_set::iterator i=old_configs.begin(); i!=old_configs.end(); ) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1216 CONFIG *old = *i;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1217 if (!old->reference_count) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1218 if (debug_syslog) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1219 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1220 snprintf(buf, sizeof(buf), "freeing memory for old configuration generation %d", old->generation);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1221 my_syslog(buf);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1222 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1223 delete old; // destructor does all the work
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1224 old_configs.erase(i++);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1225 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1226 else i++;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1227 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1228 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1229 return NULL;
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
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1233 void usage(char *prog);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1234 void usage(char *prog)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1235 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1236 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
1237 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
1238 fprintf(stderr, " and should be local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1239 fprintf(stderr, "where sm-sock-addr is for the connection to sendmail\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1240 fprintf(stderr, " and should be one of\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1241 fprintf(stderr, " inet:port@ip-address\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1242 fprintf(stderr, " local:local-domain-socket-file-name\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1243 fprintf(stderr, "-c will load and dump the config to stdout\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1244 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
1245 fprintf(stderr, " in an infinte loop.\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1246 fprintf(stderr, "-d will set the syslog message level, currently 0 to 3\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1247 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
1248 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
1249 fprintf(stderr, " addresses in the argument to the -e switch\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1250 }
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 void setup_socket(char *sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1255 void setup_socket(char *sock) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1256 unlink(sock);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1257 // sockaddr_un addr;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1258 // memset(&addr, '\0', sizeof addr);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1259 // addr.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1260 // strncpy(addr.sun_path, sock, sizeof(addr.sun_path)-1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1261 // int s = socket(AF_UNIX, SOCK_STREAM, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1262 // bind(s, (sockaddr*)&addr, sizeof(addr));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1263 // close(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1264 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1265
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1266
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1267 /*
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1268 * The signal handler function -- only gets called when a SIGCHLD
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1269 * is received, ie when a child terminates
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1270 */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1271 void sig_chld(int signo)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1272 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1273 int status;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1274 /* Wait for any child without blocking */
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1275 while (waitpid(-1, &status, WNOHANG) > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1276 // ignore child exit status, we only do this to cleanup zombies
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1277 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1278 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1279
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1280
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1281 int main(int argc, char**argv)
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1282 {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1283 token_init();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1284 bool check = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1285 bool stress = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1286 bool setconn = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1287 bool setreso = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1288 char *email = NULL;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1289 int c;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1290 const char *args = "r:p:t:e:d:chs";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1291 extern char *optarg;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1292
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1293 // Process command line options
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1294 while ((c = getopt(argc, argv, args)) != -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1295 switch (c) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1296 case 'r':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1297 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1298 fprintf(stderr, "Illegal resolver socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1299 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1300 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1301 resolver_port = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1302 setup_socket(resolver_port);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1303 setreso = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1304 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1305
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1306 case 'p':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1307 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1308 fprintf(stderr, "Illegal sendmail socket: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1309 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1310 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1311 if (smfi_setconn(optarg) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1312 fprintf(stderr, "smfi_setconn failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1313 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1314 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1315 if (strncasecmp(optarg, "unix:", 5) == 0) setup_socket(optarg + 5);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1316 else if (strncasecmp(optarg, "local:", 6) == 0) setup_socket(optarg + 6);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1317 setconn = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1318 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1319
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1320 case 't':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1321 if (optarg == NULL || *optarg == '\0') {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1322 fprintf(stderr, "Illegal timeout: %s\n", optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1323 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1324 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1325 if (smfi_settimeout(atoi(optarg)) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1326 fprintf(stderr, "smfi_settimeout failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1327 exit(EX_SOFTWARE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1328 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1329 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1330
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1331 case 'e':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1332 if (email) free(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1333 email = strdup(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1334 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1335
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1336 case 'c':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1337 check = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1338 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1339
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1340 case 's':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1341 stress = true;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1342 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1343
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1344 case 'd':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1345 if (optarg == NULL || *optarg == '\0') debug_syslog = 1;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1346 else debug_syslog = atoi(optarg);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1347 break;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1348
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1349 case 'h':
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1350 default:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1351 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1352 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1353 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1354 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1355
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1356 if (check) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1357 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1358 debug_syslog = 10;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1359 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1360 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1361 conf->dump();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1362 delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1363 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1364 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1365 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1366 return 1; // config failed to load
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1367 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1368 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1369
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1370 if (stress) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1371 fprintf(stdout, "stress testing\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1372 while (1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1373 for (int i=0; i<10; i++) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1374 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1375 if (conf) delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1376 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1377 fprintf(stdout, ".");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1378 fflush(stdout);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1379 sleep(1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1380 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1381 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1382
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1383 if (email) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1384 char *x = strchr(email, '|');
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1385 if (x) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1386 *x = '\0';
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1387 char *from = strdup(email);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1388 char *to = strdup(x+1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1389 use_syslog = false;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1390 CONFIG *conf = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1391 if (conf) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1392 CONTEXTP con = conf->find_context(to);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1393 char buf[maxlen];
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1394 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
1395 CONTEXTP fc = con->find_context(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1396 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
1397 char *st = fc->find_from(from);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1398 fprintf(stdout, "envelope from <%s> finds status %s\n", from, st);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1399 delete conf;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1400 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1401 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1402 return 0;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1403 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1404
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1405 if (!setconn) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1406 fprintf(stderr, "%s: Missing required -p argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1407 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1408 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1409 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1410
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1411 if (!setreso) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1412 fprintf(stderr, "%s: Missing required -r argument\n", argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1413 usage(argv[0]);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1414 exit(EX_USAGE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1415 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1416
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1417 if (smfi_register(smfilter) == MI_FAILURE) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1418 fprintf(stderr, "smfi_register failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1419 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1420 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1421
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1422 // switch to background mode
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1423 if (daemon(1,0) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1424 fprintf(stderr, "daemon() call failed\n");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1425 exit(EX_UNAVAILABLE);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1426 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1427
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1428 // write the pid
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1429 const char *pidpath = "/var/run/dnsbl.pid";
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1430 unlink(pidpath);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1431 FILE *f = fopen(pidpath, "w");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1432 if (f) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1433 #ifdef linux
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1434 // from a comment in the DCC source code:
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1435 // Linux threads are broken. Signals given the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1436 // original process are delivered to only the
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1437 // thread that happens to have that PID. The
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1438 // sendmail libmilter thread that needs to hear
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1439 // SIGINT and other signals does not, and that breaks
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1440 // scripts that need to stop milters.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1441 // However, signaling the process group works.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1442 fprintf(f, "-%d\n", (u_int)getpgrp());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1443 #else
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1444 fprintf(f, "%d\n", (u_int)getpid());
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1445 #endif
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1446 fclose(f);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1447 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1448
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1449 // initialize the thread sync objects
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1450 pthread_mutex_init(&config_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1451 pthread_mutex_init(&syslog_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1452 pthread_mutex_init(&resolve_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1453 pthread_mutex_init(&fd_pool_mutex, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1454
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1455 // drop root privs
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1456 struct passwd *pw = getpwnam("dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1457 if (pw) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1458 if (setgid(pw->pw_gid) == -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1459 my_syslog("failed to switch to group dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1460 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1461 if (setuid(pw->pw_uid) == -1) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1462 my_syslog("failed to switch to user dnsbl");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1463 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1464 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1465
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1466 // load the initial config
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1467 config = new_conf();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1468 if (!config) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1469 my_syslog("failed to load initial configuration, quitting");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1470 exit(1);
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 // fork off the resolver listener process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1474 pid_t child = fork();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1475 if (child < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1476 my_syslog("failed to create resolver listener process");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1477 exit(0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1478 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1479 if (child == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1480 // we are the child - dns resolver listener process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1481 resolver_socket = socket(AF_UNIX, SOCK_STREAM, 0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1482 if (resolver_socket < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1483 my_syslog("child failed to create resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1484 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1485 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1486 sockaddr_un server;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1487 memset(&server, '\0', sizeof(server));
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1488 server.sun_family = AF_UNIX;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1489 strncpy(server.sun_path, resolver_port, sizeof(server.sun_path)-1);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1490 //try to bind the address to the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1491 if (bind(resolver_socket, (sockaddr *)&server, sizeof(server)) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1492 // bind failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1493 shutdown(resolver_socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1494 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1495 my_syslog("child failed to bind resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1496 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1497 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1498 //listen on the socket.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1499 if (listen(resolver_socket, 10) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1500 // listen failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1501 shutdown(resolver_socket, SHUT_RDWR);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1502 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1503 my_syslog("child failed to listen to resolver socket");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1504 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1505 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1506 // setup sigchld handler to prevent zombies
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1507 struct sigaction act;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1508 act.sa_handler = sig_chld; // Assign sig_chld as our SIGCHLD handler
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1509 sigemptyset(&act.sa_mask); // We don't want to block any other signals in this example
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1510 act.sa_flags = SA_NOCLDSTOP; // only want children that have terminated
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1511 if (sigaction(SIGCHLD, &act, NULL) < 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1512 my_syslog("child failed to setup SIGCHLD handler");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1513 exit(0); // failed
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1514 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1515 while (true) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1516 sockaddr_un client;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1517 socklen_t clientlen = sizeof(client);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1518 int s = accept(resolver_socket, (sockaddr *)&client, &clientlen);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1519 if (s > 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1520 // accept worked, it did not get cancelled before we could accept it
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1521 // fork off a process to handle this connection
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1522 int newchild = fork();
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1523 if (newchild == 0) {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1524 // this is the worker process
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1525 // child does not need the listening socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1526 close(resolver_socket);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1527 process_resolver_requests(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1528 exit(0);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1529 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1530 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1531 // this is the parent
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1532 // parent does not need the accepted socket
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1533 close(s);
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1534 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1535 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1536 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1537 exit(0); // make sure we don't fall thru.
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1538 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1539 else {
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1540 sleep(2); // allow child to get started
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1541 }
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1542
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1543 // only create threads after the fork() in daemon
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1544 pthread_t tid;
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1545 if (pthread_create(&tid, 0, config_loader, 0))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1546 my_syslog("failed to create config loader thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1547 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1548 my_syslog("failed to detach config loader thread");
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
1549 if (pthread_create(&tid, 0, verify_closer, 0))
e107ade3b1c0 fix dos line terminators
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parents: 92
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1550 my_syslog("failed to create verify closer thread");
e107ade3b1c0 fix dos line terminators
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parents: 92
diff changeset
1551 if (pthread_detach(tid))
e107ade3b1c0 fix dos line terminators
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parents: 92
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1552 my_syslog("failed to detach verify closer thread");
e107ade3b1c0 fix dos line terminators
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1553
e107ade3b1c0 fix dos line terminators
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1554 time_t starting = time(NULL);
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1555 int rc = smfi_main();
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1556 if ((rc != MI_SUCCESS) && (time(NULL) > starting+5*60)) {
e107ade3b1c0 fix dos line terminators
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1557 my_syslog("trying to restart after smfi_main()");
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1558 loader_run = false; // eventually the config loader thread will terminate
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1559 execvp(argv[0], argv);
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1560 }
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1561 exit((rc == MI_SUCCESS) ? 0 : EX_UNAVAILABLE);
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1562 }
e107ade3b1c0 fix dos line terminators
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1563