src/modules/m_spanningtree/resolvers.cpp

   1 #include "configreader.h"
   2 #include "users.h"
   3 #include "channels.h"
   4 #include "modules.h"
   5 #include "commands/cmd_whois.h"
   6 #include "commands/cmd_stats.h"
   7 #include "socket.h"
   8 #include "inspircd.h"
   9 #include "wildcard.h"
  10 #include "xline.h"
  11 #include "transport.h"
  12
  13 #include "m_spanningtree/resolvers.h"
  14 #include "m_spanningtree/main.h"
  15 #include "m_spanningtree/utils.h"
  16 #include "m_spanningtree/treeserver.h"
  17 #include "m_spanningtree/link.h"
  18 #include "m_spanningtree/treesocket.h"
  19
  20 /* $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 */
  21
  22 /** This class is used to resolve server hostnames during /connect and autoconnect.
  23  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
  24  * resolver step first ourselves if we need it. This is totally nonblocking, and will
  25  * callback to OnLookupComplete or OnError when completed. Once it has completed we
  26  * will have an IP address which we can then use to continue our connection.
  27  */
  28 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)
  29 {
  30         /* Nothing in here, folks */
  31 }
  32
  33 void ServernameResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
  34 {
  35         /* Initiate the connection, now that we have an IP to use.
  36          * Passing a hostname directly to InspSocket causes it to
  37          * just bail and set its FD to -1.
  38          */
  39         TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
  40         if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
  41         {
  42
  43                 if ((!MyLink.Hook.empty()) && (Utils->hooks.find(MyLink.Hook.c_str()) ==  Utils->hooks.end()))
  44                         return;
  45
  46                 TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str(),
  47                                                         MyLink.Bind, MyLink.Hook.empty() ? NULL : Utils->hooks[MyLink.Hook.c_str()]);
  48                 if (newsocket->GetFd() > -1)
  49                 {
  50                         /* We're all OK */
  51                 }
  52                 else
  53                 {
  54                         /* Something barfed, show the opers */
  55                         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
  56                         delete newsocket;
  57                         Utils->DoFailOver(&MyLink);
  58                 }
  59         }
  60 }
  61
  62 void ServernameResolver::OnError(ResolverError e, const std::string &errormessage)
  63 {
  64         /* Ooops! */
  65         if (query == DNS_QUERY_AAAA)
  66         {
  67                 bool cached;
  68                 ServernameResolver* snr = new ServernameResolver(mine, Utils, ServerInstance, host, MyLink, cached, DNS_QUERY_A);
  69                 ServerInstance->AddResolver(snr, cached);
  70                 return;
  71         }
  72         ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
  73         Utils->DoFailOver(&MyLink);
  74 }
  75