src/modules/m_spanningtree/resolvers.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/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 #include "socket.h"
  16 #include "xline.h"
  17
  18 #include "resolvers.h"
  19 #include "main.h"
  20 #include "utils.h"
  21 #include "treeserver.h"
  22 #include "link.h"
  23 #include "treesocket.h"
  24
  25 /* $ModDep: m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h */
  26
  27 /** This class is used to resolve server hostnames during /connect and autoconnect.
  28  * As of 1.1, the resolver system is seperated out from BufferedSocket, so we must do this
  29  * resolver step first ourselves if we need it. This is totally nonblocking, and will
  30  * callback to OnLookupComplete or OnError when completed. Once it has completed we
  31  * will have an IP address which we can then use to continue our connection.
  32  */
  33 ServernameResolver::ServernameResolver(SpanningTreeUtilities* Util, const std::string &hostname, Link* x, bool &cached, QueryType qt, Autoconnect* myac)
  34         : Resolver(hostname, qt, cached, Util->Creator), Utils(Util), query(qt), host(hostname), MyLink(x), myautoconnect(myac)
  35 {
  36 }
  37
  38 void ServernameResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
  39 {
  40         /* Initiate the connection, now that we have an IP to use.
  41          * Passing a hostname directly to BufferedSocket causes it to
  42          * just bail and set its FD to -1.
  43          */
  44         TreeServer* CheckDupe = Utils->FindServer(MyLink->Name.c_str());
  45         if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
  46         {
  47                 TreeSocket* newsocket = new TreeSocket(Utils, result, MyLink->Port, MyLink->Timeout ? MyLink->Timeout : 10,
  48                         MyLink->Name.c_str(), MyLink->Bind, myautoconnect, MyLink->Hook);
  49                 if (newsocket->GetFd() > -1)
  50                 {
  51                         /* We're all OK */
  52                 }
  53                 else
  54                 {
  55                         /* Something barfed, show the opers */
  56                         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",
  57                                 MyLink->Name.c_str(), newsocket->getError().c_str());
  58                         ServerInstance->GlobalCulls.AddItem(newsocket);
  59                 }
  60         }
  61 }
  62
  63 void ServernameResolver::OnError(ResolverError e, const std::string &errormessage)
  64 {
  65         /* Ooops! */
  66         if (query == DNS_QUERY_AAAA)
  67         {
  68                 bool cached;
  69                 ServernameResolver* snr = new ServernameResolver(Utils, host, MyLink, cached, DNS_QUERY_A, myautoconnect);
  70                 ServerInstance->AddResolver(snr, cached);
  71                 return;
  72         }
  73         ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s", MyLink->Name.c_str(), errormessage.c_str() );
  74         Utils->Creator->ConnectServer(myautoconnect, false);
  75 }
  76