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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "commands/cmd_whois.h"
#include "commands/cmd_stats.h"
#include "socket.h"
#include "wildcard.h"
#include "xline.h"
#include "transport.h"
#include "socketengine.h"
#include "m_spanningtree/main.h"
#include "m_spanningtree/utils.h"
#include "m_spanningtree/treeserver.h"
#include "m_spanningtree/link.h"
#include "m_spanningtree/treesocket.h"
#include "m_spanningtree/resolvers.h"
#include "m_spanningtree/handshaketimer.h"
/* $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 */
/*
* Some server somewhere in the network introducing another server.
* -- w
*/
bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> ¶ms)
{
if (params.size() < 5)
{
SendError("Protocol error - Missing SID");
return false;
}
std::string servername = params[0];
std::string password = params[1];
// hopcount is not used for a remote server, we calculate this ourselves
std::string sid = params[3];
std::string description = params[4];
TreeServer* ParentOfThis = Utils->FindServer(prefix);
if (!ParentOfThis)
{
this->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
return false;
}
if (!this->Instance->IsSID(sid))
{
this->SendError("Invalid format server ID: "+sid+"!");
return false;
}
TreeServer* CheckDupe = Utils->FindServer(servername);
if (CheckDupe)
{
this->SendError("Server "+servername+" already exists!");
this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
return false;
}
Link* lnk = Utils->FindLink(servername);
TreeServer *Node = new TreeServer(this->Utils, this->Instance, servername, description, sid, ParentOfThis,NULL, lnk ? lnk->Hidden : false);
if (Node->DuplicateID())
{
this->SendError("Server ID "+sid+" already exists on the network!");
this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, server ID already exists on the network. Closing link with " + prefix);
return false;
}
ParentOfThis->AddChild(Node);
params[4] = ":" + params[4];
Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
return true;
}
/*
* This is used after the other side of a connection has accepted our credentials.
* They are then introducing themselves to us, BEFORE either of us burst. -- w
*/
bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> ¶ms)
{
if (params.size() < 5)
{
SendError("Protocol error - Missing SID");
return false;
}
irc::string servername = params[0].c_str();
std::string sname = params[0];
std::string password = params[1];
std::string sid = params[3];
std::string description = params[4];
int hops = atoi(params[2].c_str());
this->InboundServerName = sname;
this->InboundDescription = description;
this->InboundSID = sid;
if (!sentcapab)
this->SendCapabilities();
if (hops)
{
this->SendError("Server too far away for authentication");
this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
return false;
}
if (!this->Instance->IsSID(sid))
{
this->SendError("Invalid format server ID: "+sid+"!");
return false;
}
for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
{
if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
{
TreeServer* CheckDupe = Utils->FindServer(sname);
if (CheckDupe)
{
this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
return false;
}
/*
* They're in WAIT_AUTH_2 (having accepted our credentials).
* Set our state to CONNECTED (since everything's peachy so far) and send our
* netburst to them, which will trigger their CONNECTED state, and BURST in reply.
*
* While we're at it, create a treeserver object so we know about them.
* -- w
*/
this->LinkState = CONNECTED;
TreeServer *Node = new TreeServer(this->Utils, this->Instance, sname, description, sid, Utils->TreeRoot, this, x->Hidden);
if (Node->DuplicateID())
{
this->SendError("Server ID "+sid+" already exists on the network!");
this->Instance->SNO->WriteToSnoMask('l',"Server \2"+assign(servername)+"\2 being introduced denied, server ID already exists on the network. Closing link.");
return false;
}
Utils->TreeRoot->AddChild(Node);
params[4] = ":" + params[4];
Utils->DoOneToAllButSender(Instance->Config->GetSID(),"SERVER",params,sname);
Node->bursting = true;
this->DoBurst(Node);
return true;
}
}
this->SendError("Invalid credentials");
this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
return false;
}
/*
* Someone else is attempting to connect to us if this is called. Validate their credentials etc.
* -- w
*/
bool TreeSocket::Inbound_Server(std::deque<std::string> ¶ms)
{
if (params.size() < 5)
{
SendError("Protocol error - Missing SID");
return false;
}
irc::string servername = params[0].c_str();
std::string sname = params[0];
std::string password = params[1];
std::string sid = params[3];
std::string description = params[4];
int hops = atoi(params[2].c_str());
this->InboundServerName = sname;
this->InboundDescription = description;
this->InboundSID = sid;
if (!sentcapab)
this->SendCapabilities();
if (hops)
{
this->SendError("Server too far away for authentication");
this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
return false;
}
if (!this->Instance->IsSID(sid))
{
this->SendError("Invalid format server ID: "+sid+"!");
return false;
}
for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
{
if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
{
/* Check for fully initialized instances of the server by id */
Instance->Logs->Log("m_spanningtree",DEBUG,"Looking for dupe SID %s", sid.c_str());
TreeServer* CheckDupeSID = Utils->FindServerID(sid);
if (CheckDupeSID)
{
this->SendError("Server ID "+CheckDupeSID->GetID()+" already exists on server "+CheckDupeSID->GetName()+"!");
this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server ID '"+CheckDupeSID->GetID()+
"' already exists on server "+CheckDupeSID->GetName());
return false;
}
/* Now check for fully initialized instances of the server by name */
TreeServer* CheckDupe = Utils->FindServer(sname);
if (CheckDupe)
{
this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
return false;
}
this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
if (this->Hook)
{
std::string name = BufferedSocketNameRequest((Module*)Utils->Creator, this->Hook).Send();
this->Instance->SNO->WriteToSnoMask('l',"Connection from \2"+sname+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+name+"\2");
}
// this is good. Send our details: Our server name and description and hopcount of 0,
// along with the sendpass from this block.
this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 "+Instance->Config->GetSID()+" :"+this->Instance->Config->ServerDesc);
// move to the next state, we are now waiting for THEM.
this->LinkState = WAIT_AUTH_2;
return true;
}
}
this->SendError("Invalid credentials");
this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
return false;
}
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