/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
*
* 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 "socketengine.h"
#include "main.h"
#include "utils.h"
#include "link.h"
#include "treeserver.h"
#include "treesocket.h"
/* $ModDep: m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/treesocket.h m_spanningtree/link.h */
/*
* Some server somewhere in the network introducing another server.
* -- w
*/
bool TreeSocket::RemoteServer(const std::string &prefix, parameterlist ¶ms)
{
if (params.size() < 5)
{
SendError("Protocol error - Not enough parameters for SERVER command");
return false;
}
std::string servername = params[0];
// password is not used for a remote server
// hopcount is not used (ever)
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 (!ServerInstance->IsSID(sid))
{
this->SendError("Invalid format server ID: "+sid+"!");
return false;
}
TreeServer* CheckDupe = Utils->FindServer(servername);
if (CheckDupe)
{
this->SendError("Server "+servername+" already exists!");
ServerInstance->SNO->WriteToSnoMask('L', "Server \2"+CheckDupe->GetName()+"\2 being introduced from \2" + ParentOfThis->GetName() + "\2 denied, already exists. Closing link with " + ParentOfThis->GetName());
return false;
}
CheckDupe = Utils->FindServer(sid);
if (CheckDupe)
{
this->SendError("Server ID "+sid+" already exists! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
ServerInstance->SNO->WriteToSnoMask('L', "Server \2"+servername+"\2 being introduced from \2" + ParentOfThis->GetName() + "\2 denied, server ID already exists on the network. Closing link with " + ParentOfThis->GetName());
return false;
}
Link* lnk = Utils->FindLink(servername);
TreeServer *Node = new TreeServer(Utils, servername, description, sid, ParentOfThis,NULL, lnk ? lnk->Hidden : false);
ParentOfThis->AddChild(Node);
params[4] = ":" + params[4];
Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
ServerInstance->SNO->WriteToSnoMask('L', "Server \002"+ParentOfThis->GetName()+"\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(parameterlist ¶ms)
{
if (params.size() < 5)
{
SendError("Protocol error - Not enough parameters for SERVER command");
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->SendCapabilities(2);
if (hops)
{
this->SendError("Server too far away for authentication");
ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
return false;
}
if (!ServerInstance->IsSID(sid))
{
this->SendError("Invalid format server ID: "+sid+"!");
return false;
}
for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
{
Link* x = *i;
if (x->Name != servername && x->Name != "*") // open link allowance
continue;
if (!ComparePass(*x, password))
{
ServerInstance->SNO->WriteToSnoMask('l',"Invalid password on link: %s", x->Name.c_str());
continue;
}
TreeServer* CheckDupe = Utils->FindServer(sname);
if (CheckDupe)
{
this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
return false;
}
CheckDupe = Utils->FindServer(sid);
if (CheckDupe)
{
this->SendError("Server ID "+sid+" already exists on the network! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
ServerInstance->SNO->WriteToSnoMask('l',"Server \2"+assign(servername)+"\2 being introduced denied, server ID already exists on the network. Closing link.");
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;
Utils->timeoutlist.erase(this);
linkID = sname;
MyRoot = new TreeServer(Utils, sname, description, sid, Utils->TreeRoot, this, x->Hidden);
Utils->TreeRoot->AddChild(MyRoot);
this->DoBurst(MyRoot);
params[4] = ":" + params[4];
/* IMPORTANT: Take password/hmac hash OUT of here before we broadcast the introduction! */
params[1] = "*";
Utils->DoOneToAllButSender(ServerInstance->Config->GetSID(),"SERVER",params,sname);
return true;
}
this->SendError("Invalid credentials (check the other server's linking snomask for more information)");
ServerInstance->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(parameterlist ¶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->SendCapabilities(2);
if (hops)
{
this->SendError("Server too far away for authentication");
ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
return false;
}
if (!ServerInstance->IsSID(sid))
{
this->SendError("Invalid format server ID: "+sid+"!");
return false;
}
for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); i++)
{
Link* x = *i;
if (x->Name != servername && x->Name != "*") // open link allowance
continue;
if (!ComparePass(*x, password))
{
ServerInstance->SNO->WriteToSnoMask('l',"Invalid password on link: %s", x->Name.c_str());
continue;
}
/* Now check for fully initialized ServerInstances of the server by name */
TreeServer* CheckDupe = Utils->FindServer(sname);
if (CheckDupe)
{
std::string pname = CheckDupe->GetParent() ? CheckDupe->GetParent()->GetName() : "<ourself>";
SendError("Server "+sname+" already exists on server "+pname+"!");
ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+pname);
return false;
}
/* Check for fully initialized instances of the server by id */
ServerInstance->Logs->Log("m_spanningtree",DEBUG,"Looking for dupe SID %s", sid.c_str());
CheckDupe = Utils->FindServerID(sid);
if (CheckDupe)
{
this->SendError("Server ID "+CheckDupe->GetID()+" already exists on server "+CheckDupe->GetName()+"! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server ID '"+CheckDupe->GetID()+
"' already exists on server "+CheckDupe->GetName());
return false;
}
ServerInstance->SNO->WriteToSnoMask('l',"Verified incoming server connection " + linkID + " ("+description+")");
linkID = sname;
// this is good. Send our details: Our server name and description and hopcount of 0,
// along with the sendpass from this block.
this->SendCapabilities(2);
this->WriteLine(std::string("SERVER ")+ServerInstance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 "+ServerInstance->Config->GetSID()+" :"+ServerInstance->Config->ServerDesc);
// move to the next state, we are now waiting for THEM.
MyRoot = new TreeServer(Utils, sname, description, sid, Utils->TreeRoot, this, x->Hidden);
Utils->TreeRoot->AddChild(MyRoot);
this->LinkState = WAIT_AUTH_2;
return true;
}
this->SendError("Invalid credentials");
ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
return false;
}
