src/user_resolver.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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 /* $Core */
  15
  16 #include "inspircd.h"
  17
  18 UserResolver::UserResolver(InspIRCd* Instance, User* user, std::string to_resolve, QueryType qt, bool &cache) :
  19         Resolver(Instance, to_resolve, qt, cache), bound_user(user)
  20 {
  21         this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
  22         this->bound_fd = user->GetFd();
  23 }
  24
  25 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached, int resultnum)
  26 {
  27         /* We are only interested in the first matching result */
  28         if (resultnum)
  29                 return;
  30
  31         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
  32         {
  33                 this->bound_user->stored_host = result;
  34                 try
  35                 {
  36                         /* Check we didnt time out */
  37                         if (this->bound_user->registered != REG_ALL)
  38                         {
  39                                 bool lcached;
  40 #ifdef IPV6
  41                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
  42                                 {
  43                                         /* IPV6 forward lookup (with possibility of 4in6) */
  44                                         const char* ip = this->bound_user->GetIPString();
  45                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), lcached);
  46                                 }
  47                                 else
  48                                         /* IPV4 lookup (mixed protocol mode) */
  49 #endif
  50                                 /* IPV4 lookup (ipv4 only mode) */
  51                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, lcached);
  52                                 this->ServerInstance->AddResolver(bound_user->res_forward, lcached);
  53                         }
  54                 }
  55                 catch (CoreException& e)
  56                 {
  57                         ServerInstance->Logs->Log("RESOLVER", DEBUG,"Error in resolver: %s",e.GetReason());
  58                 }
  59         }
  60         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
  61         {
  62                 /* Both lookups completed */
  63                 std::string result2("0::ffff:");
  64                 result2.append(result);
  65                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
  66                 {
  67                         std::string hostname = this->bound_user->stored_host;
  68                         if (hostname.length() < 65)
  69                         {
  70                                 /* Check we didnt time out */
  71                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
  72                                 {
  73                                         /* Hostnames starting with : are not a good thing (tm) */
  74                                         if (hostname[0] == ':')
  75                                                 hostname.insert(0, "0");
  76
  77                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
  78                                         this->bound_user->dns_done = true;
  79                                         this->bound_user->dhost.assign(hostname, 0, 64);
  80                                         this->bound_user->host.assign(hostname, 0, 64);
  81                                         /* Invalidate cache */
  82                                         this->bound_user->InvalidateCache();
  83                                 }
  84                         }
  85                         else
  86                         {
  87                                 if (!this->bound_user->dns_done)
  88                                 {
  89                                         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());
  90                                         this->bound_user->dns_done = true;
  91                                 }
  92                         }
  93                 }
  94                 else
  95                 {
  96                         if (!this->bound_user->dns_done)
  97                         {
  98                                 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());
  99                                 this->bound_user->dns_done = true;
 100                         }
 101                 }
 102         }
 103 }
 104
 105 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 106 {
 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