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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "socket.h"
#include "xline.h"
#include "resolvers.h"
#include "main.h"
#include "utils.h"
#include "treeserver.h"
#include "link.h"
#include "treesocket.h"
/* $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 */
/** This class is used to resolve server hostnames during /connect and autoconnect.
* As of 1.1, the resolver system is seperated out from BufferedSocket, so we must do this
* resolver step first ourselves if we need it. This is totally nonblocking, and will
* callback to OnLookupComplete or OnError when completed. Once it has completed we
* will have an IP address which we can then use to continue our connection.
*/
ServernameResolver::ServernameResolver(SpanningTreeUtilities* Util, const std::string &hostname, Link* x, bool &cached, QueryType qt, Autoconnect* myac)
: Resolver(hostname, qt, cached, Util->Creator), Utils(Util), query(qt), host(hostname), MyLink(x), myautoconnect(myac)
{
}
void ServernameResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
{
/* Initiate the connection, now that we have an IP to use.
* Passing a hostname directly to BufferedSocket causes it to
* just bail and set its FD to -1.
*/
TreeServer* CheckDupe = Utils->FindServer(MyLink->Name.c_str());
if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
{
TreeSocket* newsocket = new TreeSocket(Utils, MyLink, myautoconnect, result);
if (newsocket->GetFd() > -1)
{
/* We're all OK */
}
else
{
/* Something barfed, show the opers */
ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",
MyLink->Name.c_str(), newsocket->getError().c_str());
ServerInstance->GlobalCulls.AddItem(newsocket);
}
}
}
void ServernameResolver::OnError(ResolverError e, const std::string &errormessage)
{
/* Ooops! */
if (query == DNS_QUERY_AAAA)
{
bool cached = false;
ServernameResolver* snr = new ServernameResolver(Utils, host, MyLink, cached, DNS_QUERY_A, myautoconnect);
ServerInstance->AddResolver(snr, cached);
return;
}
ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s", MyLink->Name.c_str(), errormessage.c_str() );
Utils->Creator->ConnectServer(myautoconnect, false);
}
SecurityIPResolver::SecurityIPResolver(Module* me, SpanningTreeUtilities* U, const std::string &hostname, Link* x, bool &cached, QueryType qt)
: Resolver(hostname, qt, cached, me), MyLink(x), Utils(U), mine(me), host(hostname), query(qt)
{
}
void SecurityIPResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
{
for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i != Utils->LinkBlocks.end(); ++i)
{
Link* L = *i;
if (L->IPAddr == host)
{
Utils->ValidIPs.push_back(result);
break;
}
}
}
void SecurityIPResolver::OnError(ResolverError e, const std::string &errormessage)
{
if (query == DNS_QUERY_AAAA)
{
bool cached = false;
SecurityIPResolver* res = new SecurityIPResolver(mine, Utils, host, MyLink, cached, DNS_QUERY_A);
ServerInstance->AddResolver(res, cached);
return;
}
ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Could not resolve IP associated with Link '%s': %s",
MyLink->Name.c_str(),errormessage.c_str());
}
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