src/user_resolver.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15
  16 UserResolver::UserResolver(InspIRCd* Instance, User* user, std::string to_resolve, QueryType qt, bool &cache) :
  17         Resolver(Instance, to_resolve, qt, cache), bound_user(user)
  18 {
  19         this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
  20         this->bound_fd = user->GetFd();
  21 }
  22
  23 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached, int resultnum)
  24 {
  25         ServerInstance->Log(DEBUG, "Got a result (lookup complete)");
  26         /* We are only interested in the first matching result */
  27         if (resultnum)
  28                 return;
  29
  30         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
  31         {
  32                 this->bound_user->stored_host = result;
  33                 try
  34                 {
  35                         /* Check we didnt time out */
  36                         if (this->bound_user->registered != REG_ALL)
  37                         {
  38                                 bool cached;
  39 #ifdef IPV6
  40                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
  41                                 {
  42                                         /* IPV6 forward lookup (with possibility of 4in6) */
  43                                         const char* ip = this->bound_user->GetIPString();
  44                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
  45                                 }
  46                                 else
  47                                         /* IPV4 lookup (mixed protocol mode) */
  48 #endif
  49                                 /* IPV4 lookup (ipv4 only mode) */
  50                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
  51                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
  52                         }
  53                 }
  54                 catch (CoreException& e)
  55                 {
  56                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
  57                 }
  58         }
  59         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
  60         {
  61                 /* Both lookups completed */
  62                 std::string result2("0::ffff:");
  63                 result2.append(result);
  64                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
  65                 {
  66                         std::string hostname = this->bound_user->stored_host;
  67                         if (hostname.length() < 65)
  68                         {
  69                                 /* Check we didnt time out */
  70                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
  71                                 {
  72                                         /* Hostnames starting with : are not a good thing (tm) */
  73                                         if (*(hostname.c_str()) == ':')
  74                                                 hostname.insert(0, "0");
  75
  76                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
  77                                         this->bound_user->dns_done = true;
  78                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
  79                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
  80                                         /* Invalidate cache */
  81                                         this->bound_user->InvalidateCache();
  82                                 }
  83                         }
  84                         else
  85                         {
  86                                 if (!this->bound_user->dns_done)
  87                                 {
  88                                         this->bound_user->WriteServ("NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", this->bound_user->GetIPString());
  89                                         this->bound_user->dns_done = true;
  90                                 }
  91                         }
  92                 }
  93                 else
  94                 {
  95                         if (!this->bound_user->dns_done)
  96                         {
  97                                 this->bound_user->WriteServ("NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", this->bound_user->GetIPString());
  98                                 this->bound_user->dns_done = true;
  99                         }
 100                 }
 101         }
 102 }
 103
 104 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 105 {
 106         ServerInstance->Log(DEBUG, "Resolver error: " + errormessage);
 107         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 108         {
 109                 this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname: %s; using your IP address (%s) instead.", errormessage.c_str(), this->bound_user->GetIPString());
 110                 this->bound_user->dns_done = true;
 111                 ServerInstance->stats->statsDnsBad++;
 112         }
 113 }
 114
 115