src/modules/m_spanningtree/resolvers.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 #include "configreader.h"
  16 #include "users.h"
  17 #include "channels.h"
  18 #include "modules.h"
  19 #include "commands/cmd_whois.h"
  20 #include "commands/cmd_stats.h"
  21 #include "socket.h"
  22 #include "wildcard.h"
  23 #include "xline.h"
  24 #include "transport.h"
  25
  26 #include "m_spanningtree/resolvers.h"
  27 #include "m_spanningtree/main.h"
  28 #include "m_spanningtree/utils.h"
  29 #include "m_spanningtree/treeserver.h"
  30 #include "m_spanningtree/link.h"
  31 #include "m_spanningtree/treesocket.h"
  32
  33 /* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h */
  34
  35 /** This class is used to resolve server hostnames during /connect and autoconnect.
  36  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
  37  * resolver step first ourselves if we need it. This is totally nonblocking, and will
  38  * callback to OnLookupComplete or OnError when completed. Once it has completed we
  39  * will have an IP address which we can then use to continue our connection.
  40  */
  41 ServernameResolver::ServernameResolver(Module* me, SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x, bool &cached, QueryType qt) : Resolver(Instance, hostname, qt, cached, me), MyLink(x), Utils(Util), query(qt), host(hostname), mine(me)
  42 {
  43         /* Nothing in here, folks */
  44 }
  45
  46 void ServernameResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
  47 {
  48         /* Initiate the connection, now that we have an IP to use.
  49          * Passing a hostname directly to InspSocket causes it to
  50          * just bail and set its FD to -1.
  51          */
  52         TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
  53         if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
  54         {
  55
  56                 if ((!MyLink.Hook.empty()) && (Utils->hooks.find(MyLink.Hook.c_str()) ==  Utils->hooks.end()))
  57                         return;
  58
  59                 TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str(),
  60                                                         MyLink.Bind, MyLink.Hook.empty() ? NULL : Utils->hooks[MyLink.Hook.c_str()]);
  61                 if (newsocket->GetFd() > -1)
  62                 {
  63                         /* We're all OK */
  64                 }
  65                 else
  66                 {
  67                         /* Something barfed, show the opers */
  68                         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
  69                         delete newsocket;
  70                         Utils->DoFailOver(&MyLink);
  71                 }
  72         }
  73 }
  74
  75 void ServernameResolver::OnError(ResolverError e, const std::string &errormessage)
  76 {
  77         /* Ooops! */
  78         if (query == DNS_QUERY_AAAA)
  79         {
  80                 bool cached;
  81                 ServernameResolver* snr = new ServernameResolver(mine, Utils, ServerInstance, host, MyLink, cached, DNS_QUERY_A);
  82                 ServerInstance->AddResolver(snr, cached);
  83                 return;
  84         }
  85         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
  86         Utils->DoFailOver(&MyLink);
  87 }
  88