path: root/src/modules/m_spanningtree/treesocket.cpp

#include "configreader.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "commands/cmd_whois.h"
#include "commands/cmd_stats.h"
#include "socket.h"
#include "inspircd.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"

/** Because most of the I/O gubbins are encapsulated within
 * InspSocket, we just call the superclass constructor for
 * most of the action, and append a few of our own values
 * to it.
 */
TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, Module* HookMod)
	: InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
{
	myhost = host;
	this->LinkState = LISTENER;
	if (listening && Hook)
		InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
}

TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName, Module* HookMod)
	: InspSocket(SI, host, port, listening, maxtime), Utils(Util), Hook(HookMod)
{
	myhost = ServerName;
	this->LinkState = CONNECTING;
	if (Hook)
		InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
}

/** When a listening socket gives us a new file descriptor,
 * we must associate it with a socket without creating a new
 * connection. This constructor is used for this purpose.
 */
TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod)
	: InspSocket(SI, newfd, ip), Utils(Util), Hook(HookMod)
{
	this->LinkState = WAIT_AUTH_1;
	/* If we have a transport module hooked to the parent, hook the same module to this
	 * socket, and set a timer waiting for handshake before we send CAPAB etc.
	 */
	if (Hook)
	{
		InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
		Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils));
	}
	else
	{
		/* Otherwise, theres no lower layer transport in plain TCP/IP,
		 * so just send the capabilities right now.
		 */
		this->SendCapabilities();
	}
}

ServerState TreeSocket::GetLinkState()
{
	return this->LinkState;
}

Module* TreeSocket::GetHook()
{
	return this->Hook;
}

TreeSocket::~TreeSocket()
{
	if (Hook)
		InspSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send();
}

/** When an outbound connection finishes connecting, we receive
 * this event, and must send our SERVER string to the other
 * side. If the other side is happy, as outlined in the server
 * to server docs on the inspircd.org site, the other side
 * will then send back its own server string.
 */
bool TreeSocket::OnConnected()
{
	if (this->LinkState == CONNECTING)
	{
		/* we do not need to change state here. */
		for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
		{
			if (x->Name == this->myhost)
			{
				this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
				if (Hook)
				{
					InspSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send();
					this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] using transport \2"+x->Hook+"\2");
				}
				else
					this->SendCapabilities();
				/* found who we're supposed to be connecting to, send the neccessary gubbins. */
				if (Hook)
					Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils));
				else
					this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
				return true;
			}
		}
	}
	/* There is a (remote) chance that between the /CONNECT and the connection
	 * being accepted, some muppet has removed the <link> block and rehashed.
	 * If that happens the connection hangs here until it's closed. Unlikely
	 * and rather harmless.
	 */
	this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
	return true;
}

void TreeSocket::OnError(InspSocketError e)
{
	/* We don't handle this method, because all our
	 * dirty work is done in OnClose() (see below)
	 * which is still called on error conditions too.
	 */
	if (e == I_ERR_CONNECT)
	{
		this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
		Link* MyLink = Utils->FindLink(myhost);
		if (MyLink)
			Utils->DoFailOver(MyLink);
	}
}

int TreeSocket::OnDisconnect()
{
	/* For the same reason as above, we don't
	 * handle OnDisconnect()
	 */
	return true;
}

/** Recursively send the server tree with distances as hops.
 * This is used during network burst to inform the other server
 * (and any of ITS servers too) of what servers we know about.
 * If at any point any of these servers already exist on the other
 * end, our connection may be terminated. The hopcounts given
 * by this function are relative, this doesn't matter so long as
 * they are all >1, as all the remote servers re-calculate them
 * to be relative too, with themselves as hop 0.
 */
void TreeSocket::SendServers(TreeServer* Current, TreeServer* s, int hops)
{
	char command[1024];
	for (unsigned int q = 0; q < Current->ChildCount(); q++)
	{
		TreeServer* recursive_server = Current->GetChild(q);
		if (recursive_server != s)
		{
			snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
			this->WriteLine(command);
			this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
			/* down to next level */
			this->SendServers(recursive_server, s, hops+1);
		}
	}
}

std::string TreeSocket::MyCapabilities()
{
	std::vector<std::string> modlist;
	std::string capabilities = "";
	for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
	{
		if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
			modlist.push_back(this->Instance->Config->module_names[i]);
	}
	sort(modlist.begin(),modlist.end());
	for (unsigned int i = 0; i < modlist.size(); i++)
	{
		if (i)
			capabilities = capabilities + ",";
		capabilities = capabilities + modlist[i];
	}
	return capabilities;
}

void TreeSocket::SendCapabilities()
{
	irc::commasepstream modulelist(MyCapabilities());
	this->WriteLine("CAPAB START");

	/* Send module names, split at 509 length */
	std::string item = "*";
	std::string line = "CAPAB MODULES ";
	while ((item = modulelist.GetToken()) != "")
	{
		if (line.length() + item.length() + 1 > 509)
		{
			this->WriteLine(line);
			line = "CAPAB MODULES ";
		}

		if (line != "CAPAB MODULES ")
			line.append(",");

		line.append(item);
	}
	if (line != "CAPAB MODULES ")
		this->WriteLine(line);

	int ip6 = 0;
	int ip6support = 0;
#ifdef IPV6
	ip6 = 1;
#endif
#ifdef SUPPORT_IP6LINKS
	ip6support = 1;
#endif
	this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));

	this->WriteLine("CAPAB END");
}

/* Check a comma seperated list for an item */
bool TreeSocket::HasItem(const std::string &list, const std::string &item)
{
	irc::commasepstream seplist(list);
	std::string item2 = "*";
	while ((item2 = seplist.GetToken()) != "")
	{
		if (item2 == item)
			return true;
	}
	return false;
}

/* Isolate and return the elements that are different between two comma seperated lists */
std::string TreeSocket::ListDifference(const std::string &one, const std::string &two)
{
	irc::commasepstream list_one(one);
	std::string item = "*";
	std::string result = "";
	while ((item = list_one.GetToken()) != "")
	{
		if (!HasItem(two, item))
		{
			result.append(" ");
			result.append(item);
		}
	}
	return result;
}

bool TreeSocket::Capab(const std::deque<std::string> &params)
{
	if (params.size() < 1)
	{
		this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
		return false;
	}
	if (params[0] == "START")
	{
		this->ModuleList = "";
		this->CapKeys.clear();
	}
	else if (params[0] == "END")
	{
		std::string reason = "";
		int ip6support = 0;
#ifdef SUPPORT_IP6LINKS
		ip6support = 1;
#endif
		/* Compare ModuleList and check CapKeys...
		 * Maybe this could be tidier? -- Brain
		 */
		if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
		{
			std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
			if (!diff.length())
			{
				diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
			}
			else
			{
				diff = "this server:" + diff;
			}
			if (diff.length() == 12)
				reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
			else
				reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
		}
		if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
			reason = "We don't both support linking to IPV6 servers";
		if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
			reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
		if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
			reason = "Maximum nickname lengths differ or remote nickname length not specified";
		if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
		{
			if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
			{
				reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
			}
			else
			{
				reason = "Protocol version not specified";
			}
		}
		if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
			reason = "We don't both have halfop support enabled/disabled identically";
		if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
			reason = "Maximum ident lengths differ or remote ident length not specified";
		if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
			reason = "Maximum channel lengths differ or remote channel length not specified";
		if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
			reason = "Maximum modes per line differ or remote modes per line not specified";
		if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
			reason = "Maximum quit lengths differ or remote quit length not specified";
		if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
			reason = "Maximum topic lengths differ or remote topic length not specified";
		if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
			reason = "Maximum kick lengths differ or remote kick length not specified";
		if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
			reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
		if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
			reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
		if (reason.length())
		{
			this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
			return false;
		}
	}
	else if ((params[0] == "MODULES") && (params.size() == 2))
	{
		if (!this->ModuleList.length())
		{
			this->ModuleList.append(params[1]);
		}
		else
		{
			this->ModuleList.append(",");
			this->ModuleList.append(params[1]);
		}
	}

	else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
	{
		irc::tokenstream capabs(params[1]);
		std::string item = "*";
		while ((item = capabs.GetToken()) != "")
		{
			/* Process each key/value pair */
			std::string::size_type equals = item.rfind('=');
			if (equals != std::string::npos)
			{
				std::string var = item.substr(0, equals);
				std::string value = item.substr(equals+1, item.length());
				CapKeys[var] = value;
			}
		}
	}
	return true;
}

/** This function forces this server to quit, removing this server
 * and any users on it (and servers and users below that, etc etc).
 * It's very slow and pretty clunky, but luckily unless your network
 * is having a REAL bad hair day, this function shouldnt be called
 * too many times a month ;-)
 */
void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
{
	/* recursively squit the servers attached to 'Current'.
	 * We're going backwards so we don't remove users
	 * while we still need them ;)
	 */
	for (unsigned int q = 0; q < Current->ChildCount(); q++)
	{
		TreeServer* recursive_server = Current->GetChild(q);
		this->SquitServer(from,recursive_server);
	}
	/* Now we've whacked the kids, whack self */
	num_lost_servers++;
	num_lost_users += Current->QuitUsers(from);
}

/** This is a wrapper function for SquitServer above, which
 * does some validation first and passes on the SQUIT to all
 * other remaining servers.
 */
void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
{
	if ((Current) && (Current != Utils->TreeRoot))
	{
		Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
		rmode.Send(Instance);

		std::deque<std::string> params;
		params.push_back(Current->GetName());
		params.push_back(":"+reason);
		Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
		if (Current->GetParent() == Utils->TreeRoot)
		{
			this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
		}
		else
		{
			this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
		}
		num_lost_servers = 0;
		num_lost_users = 0;
		std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
		SquitServer(from, Current);
		Current->Tidy();
		Current->GetParent()->DelChild(Current);
		DELETE(Current);
		this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
	}
	else
	{
		Instance->Log(DEFAULT,"Squit from unknown server");
	}
}

/** FMODE command - server mode with timestamp checks */
bool TreeSocket::ForceMode(const std::string &source, std::deque<std::string> &params)
{
	/* Chances are this is a 1.0 FMODE without TS */
	if (params.size() < 3)
	{
		/* No modes were in the command, probably a channel with no modes set on it */
		return true;
	}

	bool smode = false;
	std::string sourceserv;
	/* Are we dealing with an FMODE from a user, or from a server? */
	userrec* who = this->Instance->FindNick(source);
	if (who)
	{
		/* FMODE from a user, set sourceserv to the users server name */
		sourceserv = who->server;
	}
	else
	{
		/* FMODE from a server, create a fake user to receive mode feedback */
		who = new userrec(this->Instance);
		who->SetFd(FD_MAGIC_NUMBER);
		smode = true;	   /* Setting this flag tells us we should free the userrec later */
		sourceserv = source;    /* Set sourceserv to the actual source string */
	}
	const char* modelist[64];
	time_t TS = 0;
	int n = 0;
	memset(&modelist,0,sizeof(modelist));
	for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
	{
		if (q == 1)
		{
			/* The timestamp is in this position.
			 * We don't want to pass that up to the
			 * server->client protocol!
			 */
			TS = atoi(params[q].c_str());
		}
		else
		{
			/* Everything else is fine to append to the modelist */
			modelist[n++] = params[q].c_str();
		}

	}
	/* Extract the TS value of the object, either userrec or chanrec */
	userrec* dst = this->Instance->FindNick(params[0]);
	chanrec* chan = NULL;
	time_t ourTS = 0;
	if (dst)
	{
		ourTS = dst->age;
	}
	else
	{
		chan = this->Instance->FindChan(params[0]);
		if (chan)
		{
			ourTS = chan->age;
		}
		else
			/* Oops, channel doesnt exist! */
			return true;
	}

	/* TS is equal: Merge the mode changes, use voooodoooooo on modes
	 * with parameters.
	 */
	if (TS == ourTS)
	{
		ModeHandler* mh = NULL;
		unsigned long paramptr = 3;
		std::string to_bounce = "";
		std::string to_keep = "";
		std::vector<std::string> params_to_keep;
		std::string params_to_bounce = "";
		bool adding = true;
		char cur_change = 1;
		char old_change = 0;
		char old_bounce_change = 0;
		/* Merge modes, basically do special stuff to mode with params */
		for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
		{
			switch (*x)
			{
				case '-':
					adding = false;
				break;
				case '+':
					adding = true;
				break;
				default:
					if (adding)
					{
						/* We only care about whats being set,
						 * not whats being unset
						 */
						mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
						if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
						{
							/* We only want to do special things to
							 * modes with parameters, we are going to rewrite
							 * those parameters
							 */
							ModePair ret;
							adding ? cur_change = '+' : cur_change = '-';
							ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
							/* The mode is set here, check which we should keep */
							if (ret.first)
							{
								bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
								if (which_to_keep == true)
								{
									/* Keep ours, bounce theirs:
									 * Send back ours to them and
									 * drop their mode changs
									 */
									adding ? cur_change = '+' : cur_change = '-';
									if (cur_change != old_bounce_change)
										to_bounce += cur_change;
									to_bounce += *x;
									old_bounce_change = cur_change;
									if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
										params_to_bounce.append(" ").append(ret.second);
								}
								else
								{
									/* Keep theirs: Accept their mode change,
									 * do nothing else
									 */
									adding ? cur_change = '+' : cur_change = '-';
									if (cur_change != old_change)
										to_keep += cur_change;
									to_keep += *x;
									old_change = cur_change;
									if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
										params_to_keep.push_back(params[paramptr]);
								}
							}
							else
							{
								/* Mode isnt set here, we want it */
								adding ? cur_change = '+' : cur_change = '-';
								if (cur_change != old_change)
									to_keep += cur_change;
								to_keep += *x;
								old_change = cur_change;
								if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
									params_to_keep.push_back(params[paramptr]);
							}
							paramptr++;
						}
						else
						{
							mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
							if (mh)
							{
								adding ? cur_change = '+' : cur_change = '-';

								/* Just keep this, safe to merge with no checks
								 * it has no parameters
								 */

								if (cur_change != old_change)
									to_keep += cur_change;
								to_keep += *x;
								old_change = cur_change;

								if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
								{
									params_to_keep.push_back(params[paramptr++]);
								}
							}
						}
					}
					else
					{
						mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
						if (mh)
						{
							/* Taking a mode away */
							adding ? cur_change = '+' : cur_change = '-';
							if (cur_change != old_change)
								to_keep += cur_change;
							to_keep += *x;
							old_change = cur_change;
							if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
								params_to_keep.push_back(params[paramptr++]);
						}
					}
				break;
			}
		}
		if (to_bounce.length())
		{
			std::deque<std::string> newparams;
			newparams.push_back(params[0]);
			newparams.push_back(ConvToStr(ourTS));
			newparams.push_back(to_bounce+params_to_bounce);
			Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
		}
		if (to_keep.length())
		{
			unsigned int n = 2;
			unsigned int q = 0;
			modelist[0] = params[0].c_str();
			modelist[1] = to_keep.c_str();
			if (params_to_keep.size() > 0)
			{
				for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
				{
					modelist[n++] = params_to_keep[q].c_str();
				}
			}
			if (smode)
			{
				this->Instance->SendMode(modelist, n, who);
			}
			else
			{
				this->Instance->CallCommandHandler("MODE", modelist, n, who);
			}
			/* HOT POTATO! PASS IT ON! */
			Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
		}
	}
	else
	/* U-lined servers always win regardless of their TS */
	if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
	{
		/* Bounce the mode back to its sender.* We use our lower TS, so the other end
		 * SHOULD accept it, if its clock is right.
		 *
		 * NOTE: We should check that we arent bouncing anything thats already set at this end.
		 * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
		 * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
		 *
		 * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
		 * writing the code. It took me a while to come up with this solution.
		 *
		 * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
		 */
		std::deque<std::string> newparams;      /* New parameter list we send back */
		newparams.push_back(params[0]);	 /* Target, user or channel */
		newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
		newparams.push_back("");		/* This contains the mode string. For now
							 * it's empty, we fill it below.
							 */
		/* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
		 * set to avoid a desync here.
		 */
		std::string modebounce = "";
		bool adding = true;
		unsigned int t = 3;
		ModeHandler* mh = NULL;
		char cur_change = 1;
		char old_change = 0;
		for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
		{
			/* Iterate over all mode chars in the sent set */
			switch (*x)
			{
				/* Adding or subtracting modes? */
				case '-':
					adding = false;
				break;
				case '+':
					adding = true;
				break;
				default:
					/* Find the mode handler for this mode */
					mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
					/* Got a mode handler?
					 * This also prevents us bouncing modes we have no handler for.
					 */
					if (mh)
					{
						ModePair ret;
						std::string p = "";
						/* Does the mode require a parameter right now?
						 * If it does, fetch it if we can
						 */
						if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
							p = params[t++];
						/* Call the ModeSet method to determine if its set with the
						 * given parameter here or not.
						 */
						ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
						/* XXX: Really. Dont ask.
						 * Determine from if its set combined with what the current
						 * 'state' is (adding or not) as to wether we should 'invert'
						 * or 'reinforce' the mode change
						 */
						(!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
						/* Quickly determine if we have 'flipped' from + to -,
						 * or - to +, to prevent unneccessary +/- chars in the
						 * output string that waste bandwidth
						 */
						if (cur_change != old_change)
							modebounce += cur_change;
						old_change = cur_change;
						/* Add the mode character to the output string */
						modebounce += mh->GetModeChar();
						/* We got a parameter back from ModeHandler::ModeSet,
						 * are we supposed to be sending one out right now?
						 */
						if (ret.second.length())
						{
							if (mh->GetNumParams(cur_change == '+') > 0)
								/* Yes we're supposed to be sending out
								 * the parameter. Make sure it goes
								 */
								newparams.push_back(ret.second);
						}
					}
				break;
			}
		}

		/* Update the parameters for FMODE with the new 'bounced' string */
		newparams[2] = modebounce;
		/* Only send it back the way it came, no need to send it anywhere else */
		Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
	}
	else
	{
		/* The server was ulined, but something iffy is up with the TS.
		 * Sound the alarm bells!
		 */
		if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
		{
			this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
		}
		/* Allow the mode, route it to either server or user command handling */
		if (smode)
			this->Instance->SendMode(modelist,n,who);
		else
			this->Instance->CallCommandHandler("MODE", modelist, n, who);
		/* HOT POTATO! PASS IT ON! */
		Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
	}
	/* Are we supposed to free the userrec? */
	if (smode)
		DELETE(who);

	return true;
}

/** FTOPIC command */
bool TreeSocket::ForceTopic(const std::string &source, std::deque<std::string> &params)
{
	if (params.size() != 4)
		return true;
	time_t ts = atoi(params[1].c_str());
	std::string nsource = source;
	chanrec* c = this->Instance->FindChan(params[0]);
	if (c)
	{
		if ((ts >= c->topicset) || (!*c->topic))
		{
			std::string oldtopic = c->topic;
			strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
			strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
			c->topicset = ts;
			/* if the topic text is the same as the current topic,
			 * dont bother to send the TOPIC command out, just silently
			 * update the set time and set nick.
			 */
			if (oldtopic != params[3])
			{
				userrec* user = this->Instance->FindNick(source);
				if (!user)
				{
					c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
				}
				else
				{
					c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
					nsource = user->server;
				}
				/* all done, send it on its way */
				params[3] = ":" + params[3];
				Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
			}
		}

	}
	return true;
}

/** FJOIN, similar to TS6 SJOIN, but not quite. */
bool TreeSocket::ForceJoin(const std::string &source, std::deque<std::string> &params)
{
	/* 1.1 FJOIN works as follows:
	 *
	 * Each FJOIN is sent along with a timestamp, and the side with the lowest
	 * timestamp 'wins'. From this point on we will refer to this side as the
	 * winner. The side with the higher timestamp loses, from this point on we
	 * will call this side the loser or losing side. This should be familiar to
	 * anyone who's dealt with dreamforge or TS6 before.
	 *
	 * When two sides of a split heal and this occurs, the following things
	 * will happen:
	 *
	 * If the timestamps are exactly equal, both sides merge their privilages
	 * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
	 * re-created during a split, this is safe to do.
	 *
	 *
	 * If the timestamps are NOT equal, the losing side removes all privilage
	 * modes from all of its users that currently exist in the channel, before
	 * introducing new users into the channel which are listed in the FJOIN
	 * command's parameters. This means, all modes +ohv, and privilages added
	 * by modules, such as +qa. The losing side then LOWERS its timestamp value
	 * of the channel to match that of the winning side, and the modes of the
	 * users of the winning side are merged in with the losing side. The loser
	 * then sends out a set of FMODE commands which 'confirm' that it just
	 * removed all privilage modes from its existing users, which allows for
	 * services packages to still work correctly without needing to know the
	 * timestamping rules which InspIRCd follows. In TS6 servers this is always
	 * a problem, and services packages must contain code which explicitly
	 * behaves as TS6 does, removing ops from the losing side of a split where
	 * neccessary within its internal records, as this state information is
	 * not explicitly echoed out in that protocol.
	 *
	 * The winning side on the other hand will ignore all user modes from the
	 * losing side, so only its own modes get applied. Life is simple for those
	 * who succeed at internets. :-)
	 *
	 * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
	 * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
	 * you ask? Well, quite simply because we don't need to. They'll be sent
	 * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
	 * the losing side sends any modes for the channel which shouldnt win,
	 * they wont as their timestamp will be too high :-)
	 */

	if (params.size() < 3)
		return true;

	char first[MAXBUF];	     /* The first parameter of the mode command */
	char modestring[MAXBUF];	/* The mode sequence (2nd parameter) of the mode command */
	char* mode_users[127];	  /* The values used by the mode command */
	memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
	mode_users[0] = first;	  /* Set this up to be our on-stack value */
	mode_users[1] = modestring;     /* Same here as above */
	strcpy(modestring,"+");	 /* Initialize the mode sequence to just '+' */
	unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */

	userrec* who = NULL;		    /* User we are currently checking */
	std::string channel = params[0];	/* Channel name, as a string */
	time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
	bool created = false;

	/* Try and find the channel */
	chanrec* chan = this->Instance->FindChan(channel);

	/* Initialize channel name in the mode parameters */
	strlcpy(mode_users[0],channel.c_str(),MAXBUF);

	/* default TS is a high value, which if we dont have this
	 * channel will let the other side apply their modes.
	 */
	time_t ourTS = Instance->Time(true)+600;
	/* Does this channel exist? if it does, get its REAL timestamp */
	if (chan)
		ourTS = chan->age;
	else
		created = true; /* don't perform deops, and set TS to correct time after processing. */
	/* In 1.1, if they have the newer channel, we immediately clear
	 * all status modes from our users. We then accept their modes.
	 * If WE have the newer channel its the other side's job to do this.
	 * Note that this causes the losing server to send out confirming
	 * FMODE lines.
	 */
	if (ourTS > TS)
	{
		std::deque<std::string> param_list;
		/* Lower the TS here */
		if (Utils->AnnounceTSChange && chan)
			chan->WriteChannelWithServ(Instance->Config->ServerName,
			"NOTICE %s :TS for %s changed from %lu to %lu", chan->name, chan->name, ourTS, TS);
		ourTS = TS;
		/* Zap all the privilage modes on our side, if the channel exists here */
		if (!created)
		{
			param_list.push_back(channel);
			/* Do this first! */
			chan->age = TS;
			this->RemoveStatus(Instance->Config->ServerName, param_list);
		}
	}
	/* Put the final parameter of the FJOIN into a tokenstream ready to split it */
	irc::tokenstream users(params[2]);
	std::string item = "*";
	/* do this first, so our mode reversals are correctly received by other servers
	 * if there is a TS collision.
	 */
	params[2] = ":" + params[2];
	Utils->DoOneToAllButSender(source,"FJOIN",params,source);
	/* Now, process every 'prefixes,nick' pair */
	while (item != "")
	{
		/* Find next user */
		item = users.GetToken();
		const char* usr = item.c_str();
		/* Safety check just to make sure someones not sent us an FJOIN full of spaces
		 * (is this even possible?) */
		if (usr && *usr)
		{
			const char* permissions = usr;
			int ntimes = 0;
			char* nm = new char[MAXBUF];
			char* tnm = nm;
			/* Iterate through all the prefix values, convert them from prefixes
			 * to mode letters, and append them to the mode sequence
			 */
			while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
			{
				ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
				if (mh)
				{
					/* This is a valid prefix */
					ntimes++;
					*tnm++ = mh->GetModeChar();
				}
				else
				{
					/* Not a valid prefix...
					 * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
					 */
					this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
					this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
					return false;
				}
				usr++;
				permissions++;
			}
			/* Null terminate modes */
			*tnm = 0;
			/* Advance past the comma, to the nick */
			usr++;
			/* Check the user actually exists */
			who = this->Instance->FindNick(usr);
			if (who)
			{
				/* Did they get any modes? How many times? */
				strlcat(modestring, nm, MAXBUF);
				for (int k = 0; k < ntimes; k++)
					mode_users[modectr++] = strdup(usr);
				/* Free temporary buffer used for mode sequence */
				delete[] nm;
				/* Check that the user's 'direction' is correct
				 * based on the server sending the FJOIN. We must
				 * check each nickname in turn, because the origin of
				 * the FJOIN may be different to the origin of the nicks
				 * in the command itself.
				 */
				TreeServer* route_back_again = Utils->BestRouteTo(who->server);
				if ((!route_back_again) || (route_back_again->GetSocket() != this))
				{
					/* Oh dear oh dear. */
					continue;
				}
				/* Finally, we can actually place the user into the channel.
				 * We're sure its right. Final answer, phone a friend.
				 */
				chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
				/* Have we already queued up MAXMODES modes with parameters
				 * (+qaohv) ready to be sent to the server?
				 */
				if (modectr >= (MAXMODES-1))
				{
					/* Only actually give the users any status if we lost
					 * the FJOIN or drew (equal timestamps).
					 * It isn't actually possible for ourTS to be > TS here,
					 * only possible to actually have ourTS == TS, or
					 * ourTS < TS, because if we lost, we already lowered
					 * our TS above before we entered this loop. We only
					 * check >= as a safety measure, in case someone stuffed
					 * up. If someone DID stuff up, it was most likely me.
					 * Note: I do not like baseball bats in the face...
					 */
					if (ourTS >= TS)
					{
						this->Instance->SendMode((const char**)mode_users,modectr,who);

						/* Something stuffed up, and for some reason, the timestamp is
						 * NOT lowered right now and should be. Lower it. Usually this
						 * code won't be executed, doubtless someone will remove it some
						 * day soon.
						 */
						if (ourTS > TS)
						{
							Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
							chan->age = TS;
							ourTS = TS;
						}
					}

					/* Reset all this back to defaults, and
					 * free any ram we have left allocated.
					 */
					strcpy(mode_users[1],"+");
					for (unsigned int f = 2; f < modectr; f++)
						free(mode_users[f]);
					modectr = 2;
				}
			}
			else
			{
				/* Remember to free this */
				delete[] nm;
				/* If we got here, there's a nick in FJOIN which doesnt exist on this server.
				 * We don't try to process the nickname here (that WOULD cause a segfault because
				 * we'd be playing with null pointers) however, we DO pass the nickname on, just
				 * in case somehow we're desynched, so that other users which might be able to see
				 * the nickname get their fair chance to process it.
				 */
				Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
				continue;
			}
		}
	}

	/* there werent enough modes built up to flush it during FJOIN,
	 * or, there are a number left over. flush them out.
	 */
	if ((modectr > 2) && (who) && (chan))
	{
		if (ourTS >= TS)
		{
			/* Our channel is newer than theirs. Evil deeds must be afoot. */
			this->Instance->SendMode((const char**)mode_users,modectr,who);
			/* Yet again, we can't actually get a true value here, if everything else
			 * is working as it should.
			 */
			if (ourTS > TS)
			{
				Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
				chan->age = TS;
				ourTS = TS;
			}
		}

		/* Free anything we have left to free */
		for (unsigned int f = 2; f < modectr; f++)
			free(mode_users[f]);
	}
	/* if we newly created the channel, set it's TS properly. */
	if (created)
	{
		/* find created channel .. */
		chan = this->Instance->FindChan(channel);
		if (chan)
			/* w00t said this shouldnt be needed but it is.
			 * This isnt strictly true, as chan can be NULL
			 * if a nick collision has occured and therefore
			 * the channel was never created.
			 */
			chan->age = TS;
	}
	/* All done. That wasnt so bad was it, you can wipe
	 * the sweat from your forehead now. :-)
	 */
	return true;
}

/** NICK command */
bool TreeSocket::IntroduceClient(const std::string &source, std::deque<std::string> &params)
{
	if (params.size() < 8)
		return true;
	if (params.size() > 8)
	{
		this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
		return true;
	}
	// NICK age nick host dhost ident +modes ip :gecos
	//       0    1   2     3     4      5   6     7
	time_t age = atoi(params[0].c_str());

	const char* tempnick = params[1].c_str();
	Instance->Log(DEBUG,"New remote client %s",tempnick);

	user_hash::iterator iter = this->Instance->clientlist->find(tempnick);

	if (iter != this->Instance->clientlist->end())
	{
		// nick collision
		this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
		userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
		return true;
	}

	userrec* _new = new userrec(this->Instance);
	(*(this->Instance->clientlist))[tempnick] = _new;
	_new->SetFd(FD_MAGIC_NUMBER);
	strlcpy(_new->nick, tempnick,NICKMAX-1);
	strlcpy(_new->host, params[2].c_str(),63);
	strlcpy(_new->dhost, params[3].c_str(),63);
	_new->server = this->Instance->FindServerNamePtr(source.c_str());
	strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
	strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
	_new->registered = REG_ALL;
	_new->signon = age;

	/*
	 * we need to remove the + from the modestring, so we can do our stuff
	 */
	std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
	if (pos_after_plus != std::string::npos)
	params[5] = params[5].substr(pos_after_plus);

	for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
	{
		_new->modes[(*v)-65] = 1;
		/* For each mode thats set, increase counter */
		ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER);
		if (mh)
			mh->ChangeCount(1);
	}

	/* now we've done with modes processing, put the + back for remote servers */
	params[5] = "+" + params[5];

#ifdef SUPPORT_IP6LINKS
	if (params[6].find_first_of(":") != std::string::npos)
		_new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
	else
#endif
		_new->SetSockAddr(AF_INET, params[6].c_str(), 0);

	Instance->AddGlobalClone(_new);
	this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());

	params[7] = ":" + params[7];
	Utils->DoOneToAllButSender(source,"NICK", params, source);

	// Increment the Source Servers User Count..
	TreeServer* SourceServer = Utils->FindServer(source);
	if (SourceServer)
	{
		SourceServer->AddUserCount();
	}

	FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));

	return true;
}

/** Send one or more FJOINs for a channel of users.
 * If the length of a single line is more than 480-NICKMAX
 * in length, it is split over multiple lines.
 */
void TreeSocket::SendFJoins(TreeServer* Current, chanrec* c)
{
	std::string buffer;
	char list[MAXBUF];
	std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);

	size_t dlen, curlen;
	dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
	int numusers = 0;
	char* ptr = list + dlen;

	CUList *ulist = c->GetUsers();
	std::string modes = "";
	std::string params = "";

	for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
	{
		// The first parameter gets a : before it
		size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);

		curlen += ptrlen;
		ptr += ptrlen;

		numusers++;

		if (curlen > (480-NICKMAX))
		{
			buffer.append(list).append("\r\n");
			dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
			ptr = list + dlen;
			ptrlen = 0;
			numusers = 0;
		}
	}

	if (numusers)
		buffer.append(list).append("\r\n");

	/* Sorry for the hax. Because newly created channels assume +nt,
	 * if this channel doesnt have +nt, explicitly send -n and -t for the missing modes.
	 */
	bool inverted = false;
	if (!c->IsModeSet('n'))
	{
		modes.append("-n");
		inverted = true;
	}
	if (!c->IsModeSet('t'))
	{
		modes.append("-t");
		inverted = true;
	}
	if (inverted)
	{
		modes.append("+");
	}

	for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
	{
		modes.append("b");
		params.append(" ").append(b->data);
		if (params.length() >= MAXMODES)
		{
			/* Wrap at MAXMODES */
			buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
			modes = "";
			params = "";
		}
	}
	buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));

	/* Only send these if there are any */
	if (!modes.empty())
		buffer.append("\r\n").append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);

	this->WriteLine(buffer);
}

/** Send G, Q, Z and E lines */
void TreeSocket::SendXLines(TreeServer* Current)
{
	char data[MAXBUF];
	std::string buffer;
	std::string n = this->Instance->Config->ServerName;
	const char* sn = n.c_str();
	/* Yes, these arent too nice looking, but they get the job done */
	for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}
	for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}
	for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}
	for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}
	for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}
	for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}
	for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE G %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}
	for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++)
	{
		snprintf(data,MAXBUF,":%s ADDLINE E %s@%s %s %lu %lu :%s\r\n",sn,(*i)->identmask,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
		buffer.append(data);
	}

	if (!buffer.empty())
		this->WriteLine(buffer);
}

/** Send channel modes and topics */
void TreeSocket::SendChannelModes(TreeServer* Current)
{
	char data[MAXBUF];
	std::deque<std::string> list;
	std::string n = this->Instance->Config->ServerName;
	const char* sn = n.c_str();
	for (chan_hash::iterator c = this->Instance->chanlist->begin(); c != this->Instance->chanlist->end(); c++)
	{
		SendFJoins(Current, c->second);
		if (*c->second->topic)
		{
			snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
			this->WriteLine(data);
		}
		FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
		list.clear();
		c->second->GetExtList(list);
		for (unsigned int j = 0; j < list.size(); j++)
		{
			FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
		}
	}
}

/** send all users and their oper state/modes */
void TreeSocket::SendUsers(TreeServer* Current)
{
	char data[MAXBUF];
	std::deque<std::string> list;
	std::string dataline;
	for (user_hash::iterator u = this->Instance->clientlist->begin(); u != this->Instance->clientlist->end(); u++)
	{
		if (u->second->registered == REG_ALL)
		{
			snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
			this->WriteLine(data);
			if (*u->second->oper)
			{
				snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
				this->WriteLine(data);
			}
			if (*u->second->awaymsg)
			{
				snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
				this->WriteLine(data);
			}
			FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
			list.clear();
			u->second->GetExtList(list);

			for (unsigned int j = 0; j < list.size(); j++)
			{
				FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
			}
		}
	}
}

/** This function is called when we want to send a netburst to a local
 * server. There is a set order we must do this, because for example
 * users require their servers to exist, and channels require their
 * users to exist. You get the idea.
 */
void TreeSocket::DoBurst(TreeServer* s)
{
	std::string burst = "BURST "+ConvToStr(Instance->Time(true));
	std::string endburst = "ENDBURST";
	// Because by the end of the netburst, it  could be gone!
	std::string name = s->GetName();
	this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
	this->WriteLine(burst);
	/* send our version string */
	this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
	/* Send server tree */
	this->SendServers(Utils->TreeRoot,s,1);
	/* Send users and their oper status */
	this->SendUsers(s);
	/* Send everything else (channel modes, xlines etc) */
	this->SendChannelModes(s);
	this->SendXLines(s);
	FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
	this->WriteLine(endburst);
	this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
}

/** This function is called when we receive data from a remote
 * server. We buffer the data in a std::string (it doesnt stay
 * there for long), reading using InspSocket::Read() which can
 * read up to 16 kilobytes in one operation.
 *
 * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
 * THE SOCKET OBJECT FOR US.
 */
bool TreeSocket::OnDataReady()
{
	char* data = this->Read();
	/* Check that the data read is a valid pointer and it has some content */
	if (data && *data)
	{
		this->in_buffer.append(data);
		/* While there is at least one new line in the buffer,
		 * do something useful (we hope!) with it.
		 */
		while (in_buffer.find("\n") != std::string::npos)
		{
			std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
			in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
			/* Use rfind here not find, as theres more
			 * chance of the \r being near the end of the
			 * string, not the start.
			 */
			if (ret.find("\r") != std::string::npos)
				ret = in_buffer.substr(0,in_buffer.find("\r")-1);
			/* Process this one, abort if it
			 * didnt return true.
			 */
			if (!this->ProcessLine(ret))
			{
				return false;
			}
		}
		return true;
	}
	/* EAGAIN returns an empty but non-NULL string, so this
	 * evaluates to TRUE for EAGAIN but to FALSE for EOF.
	 */
	return (data && !*data);
}

int TreeSocket::WriteLine(std::string line)
{
	Instance->Log(DEBUG, "-> %s", line.c_str());
	line.append("\r\n");
	return this->Write(line);
}

/* Handle ERROR command */
bool TreeSocket::Error(std::deque<std::string> &params)
{
	if (params.size() < 1)
		return false;
	this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
	/* we will return false to cause the socket to close. */
	return false;
}

/** remote MOTD. leet, huh? */
bool TreeSocket::Motd(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() > 0)
	{
		if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
		{
			/* It's for our server */
			string_list results;
			userrec* source = this->Instance->FindNick(prefix);

			if (source)
			{
				std::deque<std::string> par;
				par.push_back(prefix);
				par.push_back("");

				if (!Instance->Config->MOTD.size())
				{
					par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
					Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
					return true;
				}

				par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
				Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);

				for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
				{
					par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
					Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
				}

				par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
				Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
			}
		}
		else
		{
			/* Pass it on */
			userrec* source = this->Instance->FindNick(prefix);
			if (source)
				Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
		}
	}
	return true;
}

/** remote ADMIN. leet, huh? */
bool TreeSocket::Admin(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() > 0)
	{
		if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
		{
			/* It's for our server */
			string_list results;
			userrec* source = this->Instance->FindNick(prefix);
			if (source)
			{
				std::deque<std::string> par;
				par.push_back(prefix);
				par.push_back("");
				par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
				Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
				par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
				Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
				par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
				Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
				par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
				Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
			}
		}
		else
		{
			/* Pass it on */
			userrec* source = this->Instance->FindNick(prefix);
			if (source)
				Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
		}
	}
	return true;
}

bool TreeSocket::Stats(const std::string &prefix, std::deque<std::string> &params)
{
	/* Get the reply to a STATS query if it matches this servername,
	 * and send it back as a load of PUSH queries
	 */
	if (params.size() > 1)
	{
		if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
		{
			/* It's for our server */
			string_list results;
			userrec* source = this->Instance->FindNick(prefix);
			if (source)
			{
				std::deque<std::string> par;
				par.push_back(prefix);
				par.push_back("");
				DoStats(this->Instance, *(params[0].c_str()), source, results);
				for (size_t i = 0; i < results.size(); i++)
				{
					par[1] = "::" + results[i];
					Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
				}
			}
		}
		else
		{
			/* Pass it on */
			userrec* source = this->Instance->FindNick(prefix);
			if (source)
				Utils->DoOneToOne(prefix, "STATS", params, params[1]);
		}
	}
	return true;
}


/** Because the core won't let users or even SERVERS set +o,
 * we use the OPERTYPE command to do this.
 */
bool TreeSocket::OperType(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() != 1)
		return true;
	std::string opertype = params[0];
	userrec* u = this->Instance->FindNick(prefix);
	if (u)
	{
		u->modes[UM_OPERATOR] = 1;
		this->Instance->all_opers.push_back(u);
		strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
		Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
		this->Instance->SNO->WriteToSnoMask('o',"From %s: User %s (%s@%s) is now an IRC operator of type %s",u->server, u->nick,u->ident,u->host,irc::Spacify(opertype.c_str()));
	}
	return true;
}

/** Because Andy insists that services-compatible servers must
 * implement SVSNICK and SVSJOIN, that's exactly what we do :p
 */
bool TreeSocket::ForceNick(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 3)
		return true;

	userrec* u = this->Instance->FindNick(params[0]);

	if (u)
	{
		Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
		if (IS_LOCAL(u))
		{
			std::deque<std::string> par;
			par.push_back(params[1]);
			if (!u->ForceNickChange(params[1].c_str()))
			{
				userrec::QuitUser(this->Instance, u, "Nickname collision");
				return true;
			}
			u->age = atoi(params[2].c_str());
		}
	}
	return true;
}

/*
 * Remote SQUIT (RSQUIT). Routing works similar to SVSNICK: Route it to the server that the target is connected to locally,
 * then let that server do the dirty work (squit it!). Example:
 * A -> B -> C -> D: oper on A squits D, A routes to B, B routes to C, C notices D connected locally, kills it. -- w00t
 */
bool TreeSocket::RemoteSquit(const std::string &prefix, std::deque<std::string> &params)
{
	/* ok.. :w00t RSQUIT jupe.barafranca.com :reason here */
	if (params.size() < 2)
		return true;

	TreeServer* s = Utils->FindServerMask(params[0]);

	if (s)
	{
		if (s == Utils->TreeRoot)
		{
			this->Instance->SNO->WriteToSnoMask('l',"What the fuck, I recieved a remote SQUIT for myself? :< (from %s", prefix.c_str());
			return true;
		}

		TreeSocket* sock = s->GetSocket();

		if (sock)
		{
			/* it's locally connected, KILL IT! */
			Instance->SNO->WriteToSnoMask('l',"RSQUIT: Server \002%s\002 removed from network by %s: %s", params[0].c_str(), prefix.c_str(), params[1].c_str());
			sock->Squit(s,"Server quit by " + prefix + ": " + params[1]);
			Instance->SE->DelFd(sock);
			sock->Close();
			delete sock;
		}
		else
		{
			/* route the rsquit */
			params[1] = ":" + params[1];
			Utils->DoOneToOne(prefix, "RSQUIT", params, params[0]);
		}
	}
	else
	{
		/* mother fucker! it doesn't exist */
	}

	return true;
}

bool TreeSocket::ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 2)
		return true;

	userrec* u = this->Instance->FindNick(params[0]);

	if (u)
	{
		/* only join if it's local, otherwise just pass it on! */
		if (IS_LOCAL(u))
			chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
		Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
	}
	return true;
}

bool TreeSocket::RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return false;

	std::string servermask = params[0];

	if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
	{
		this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated by \002"+prefix+"\002.");
		this->Instance->RehashServer();
		Utils->ReadConfiguration(false);
		InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
	}
	Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
	return true;
}

bool TreeSocket::RemoteKill(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() != 2)
		return true;

	std::string nick = params[0];
	userrec* u = this->Instance->FindNick(prefix);
	userrec* who = this->Instance->FindNick(nick);

	if (who)
	{
		/* Prepend kill source, if we don't have one */
		std::string sourceserv = prefix;
		if (u)
		{
			sourceserv = u->server;
		}
		if (*(params[1].c_str()) != '[')
		{
			params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
		}
		std::string reason = params[1];
		params[1] = ":" + params[1];
		Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
		who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
		userrec::QuitUser(this->Instance,who,reason);
	}
	return true;
}

bool TreeSocket::LocalPong(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return true;

	if (params.size() == 1)
	{
		TreeServer* ServerSource = Utils->FindServer(prefix);
		if (ServerSource)
		{
			ServerSource->SetPingFlag();
		}
	}
	else
	{
		std::string forwardto = params[1];
		if (forwardto == this->Instance->Config->ServerName)
		{
			/*
			 * this is a PONG for us
			 * if the prefix is a user, check theyre local, and if they are,
			 * dump the PONG reply back to their fd. If its a server, do nowt.
			 * Services might want to send these s->s, but we dont need to yet.
			 */
			userrec* u = this->Instance->FindNick(prefix);
			if (u)
			{
				u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
			}
		}
		else
		{
			// not for us, pass it on :)
			Utils->DoOneToOne(prefix,"PONG",params,forwardto);
		}
	}

	return true;
}

bool TreeSocket::MetaData(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 3)
		return true;
	TreeServer* ServerSource = Utils->FindServer(prefix);
	if (ServerSource)
	{
		if (params[0] == "*")
		{
			FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
		}
		else if (*(params[0].c_str()) == '#')
		{
			chanrec* c = this->Instance->FindChan(params[0]);
			if (c)
			{
				FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
			}
		}
		else if (*(params[0].c_str()) != '#')
		{
			userrec* u = this->Instance->FindNick(params[0]);
			if (u)
			{
				FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
			}
		}
	}

	params[2] = ":" + params[2];
	Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
	return true;
}

bool TreeSocket::ServerVersion(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return true;

	TreeServer* ServerSource = Utils->FindServer(prefix);

	if (ServerSource)
	{
		ServerSource->SetVersion(params[0]);
	}
	params[0] = ":" + params[0];
	Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
	return true;
}

bool TreeSocket::ChangeHost(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return true;
	userrec* u = this->Instance->FindNick(prefix);

	if (u)
	{
		u->ChangeDisplayedHost(params[0].c_str());
		Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
	}
	return true;
}

bool TreeSocket::AddLine(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 6)
		return true;
	bool propogate = false;
	if (!this->bursting)
		Utils->lines_to_apply = 0;
	switch (*(params[0].c_str()))
	{
		case 'Z':
			propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
			Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
			if (propogate)
				Utils->lines_to_apply |= APPLY_ZLINES;
		break;
		case 'Q':
			propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
			Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
			if (propogate)
				Utils->lines_to_apply |= APPLY_QLINES;
		break;
		case 'E':
			propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
			Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
		break;
		case 'G':
			propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
			Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
			if (propogate)
				Utils->lines_to_apply |= APPLY_GLINES;
		break;
		case 'K':
			propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
			if (propogate)
				Utils->lines_to_apply |= APPLY_KLINES;
		break;
		default:
			/* Just in case... */
			this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
			propogate = false;
		break;
	}
	/* Send it on its way */
	if (propogate)
	{
		if (atoi(params[4].c_str()))
		{
			this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire in %lu seconds (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),atoi(params[4].c_str()),params[5].c_str());
		}
		else
		{
			this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
		}
		params[5] = ":" + params[5];
		Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
	}
	if (!this->bursting)
	{
		Instance->XLines->apply_lines(Utils->lines_to_apply);
		Utils->lines_to_apply = 0;
	}
	return true;
}

bool TreeSocket::ChangeName(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return true;
	userrec* u = this->Instance->FindNick(prefix);
	if (u)
	{
		u->ChangeName(params[0].c_str());
		params[0] = ":" + params[0];
		Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
	}
	return true;
}

bool TreeSocket::Whois(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return true;
	userrec* u = this->Instance->FindNick(prefix);
	if (u)
	{
		// an incoming request
		if (params.size() == 1)
		{
			userrec* x = this->Instance->FindNick(params[0]);
			if ((x) && (IS_LOCAL(x)))
			{
				userrec* x = this->Instance->FindNick(params[0]);
				char signon[MAXBUF];
				char idle[MAXBUF];
				snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
				snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-Instance->Time(true)));
				std::deque<std::string> par;
				par.push_back(prefix);
				par.push_back(signon);
				par.push_back(idle);
				// ours, we're done, pass it BACK
				Utils->DoOneToOne(params[0],"IDLE",par,u->server);
			}
			else
			{
				// not ours pass it on
				Utils->DoOneToOne(prefix,"IDLE",params,x->server);
			}
		}
		else if (params.size() == 3)
		{
			std::string who_did_the_whois = params[0];
			userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
			if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
			{
				// an incoming reply to a whois we sent out
				std::string nick_whoised = prefix;
				unsigned long signon = atoi(params[1].c_str());
				unsigned long idle = atoi(params[2].c_str());
				if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
					do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
			}
			else
			{
				// not ours, pass it on
				Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
			}
		}
	}
	return true;
}

bool TreeSocket::Push(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 2)
		return true;
	userrec* u = this->Instance->FindNick(params[0]);
	if (!u)
		return true;
	if (IS_LOCAL(u))
	{
		u->Write(params[1]);
	}
	else
	{
		// continue the raw onwards
		params[1] = ":" + params[1];
		Utils->DoOneToOne(prefix,"PUSH",params,u->server);
	}
	return true;
}

bool TreeSocket::HandleSetTime(const std::string &prefix, std::deque<std::string> &params)
{
	if (!params.size() || !Utils->EnableTimeSync)
		return true;

	bool force = false;

	if ((params.size() == 2) && (params[1] == "FORCE"))
		force = true;

	time_t rts = atoi(params[0].c_str());
	time_t us = Instance->Time(true);

	if (rts == us)
	{
		Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
	}
	else if (force || (rts < us))
	{
		int old = Instance->SetTimeDelta(rts - us);
		Instance->Log(DEBUG, "%s TS (diff %d) from %s applied (old delta was %d)", (force) ? "Forced" : "Lower", rts - us, prefix.c_str(), old);

		Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);
	}
	else
	{
		Instance->Log(DEBUG, "Higher TS (diff %d) from %s overridden", us - rts, prefix.c_str());

		std::deque<std::string> oparams;
		oparams.push_back(ConvToStr(us));

		Utils->DoOneToMany(prefix, "TIMESET", oparams);
	}

	return true;
}

bool TreeSocket::Time(const std::string &prefix, std::deque<std::string> &params)
{
	// :source.server TIME remote.server sendernick
	// :remote.server TIME source.server sendernick TS
	if (params.size() == 2)
	{
		// someone querying our time?
		if (this->Instance->Config->ServerName == params[0])
		{
			userrec* u = this->Instance->FindNick(params[1]);
			if (u)
			{
				params.push_back(ConvToStr(Instance->Time(false)));
				params[0] = prefix;
				Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
			}
		}
		else
		{
			// not us, pass it on
			userrec* u = this->Instance->FindNick(params[1]);
			if (u)
				Utils->DoOneToOne(prefix,"TIME",params,params[0]);
		}
	}
	else if (params.size() == 3)
	{
		// a response to a previous TIME
		userrec* u = this->Instance->FindNick(params[1]);
		if ((u) && (IS_LOCAL(u)))
		{
			time_t rawtime = atol(params[2].c_str());
			struct tm * timeinfo;
			timeinfo = localtime(&rawtime);
			char tms[26];
			snprintf(tms,26,"%s",asctime(timeinfo));
			tms[24] = 0;
			u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
		}
		else
		{
			if (u)
				Utils->DoOneToOne(prefix,"TIME",params,u->server);
		}
	}
	return true;
}

bool TreeSocket::LocalPing(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return true;
	if (params.size() == 1)
	{
		std::string stufftobounce = params[0];
		this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
		return true;
	}
	else
	{
		std::string forwardto = params[1];
		if (forwardto == this->Instance->Config->ServerName)
		{
			// this is a ping for us, send back PONG to the requesting server
			params[1] = params[0];
			params[0] = forwardto;
			Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
		}
		else
		{
			// not for us, pass it on :)
			Utils->DoOneToOne(prefix,"PING",params,forwardto);
		}
		return true;
	}
}

bool TreeSocket::RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 1)
		return true;
	chanrec* c = Instance->FindChan(params[0]);
	if (c)
	{
		irc::modestacker modestack(false);
		CUList *ulist = c->GetUsers();
		const char* y[127];
		std::deque<std::string> stackresult;
		std::string x;
		for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
		{
			std::string modesequence = Instance->Modes->ModeString(i->second, c);
			if (modesequence.length())
			{
				irc::spacesepstream sep(modesequence);
				std::string modeletters = sep.GetToken();
				while (!modeletters.empty())
				{
					char mletter = *(modeletters.begin());
					modestack.Push(mletter,sep.GetToken());
					modeletters.erase(modeletters.begin());
				}
			}
		}

		while (modestack.GetStackedLine(stackresult))
		{
			stackresult.push_front(ConvToStr(c->age));
			stackresult.push_front(c->name);
			Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
			stackresult.erase(stackresult.begin() + 1);
			for (size_t z = 0; z < stackresult.size(); z++)
			{
				y[z] = stackresult[z].c_str();
			}
			userrec* n = new userrec(Instance);
			n->SetFd(FD_MAGIC_NUMBER);
			Instance->SendMode(y, stackresult.size(), n);
			delete n;
		}
	}
	return true;
}

bool TreeSocket::RemoteServer(const std::string &prefix, std::deque<std::string> &params)
{
	if (params.size() < 4)
		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 description = params[3];
	TreeServer* ParentOfThis = Utils->FindServer(prefix);
	if (!ParentOfThis)
	{
		this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
		return false;
	}
	TreeServer* CheckDupe = Utils->FindServer(servername);
	if (CheckDupe)
	{
		this->WriteLine("ERROR :Server "+servername+" already exists!");
		this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
		return false;
	}
	TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
	ParentOfThis->AddChild(Node);
	params[3] = ":" + params[3];
	Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
	this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
	return true;
}

bool TreeSocket::Outbound_Reply_Server(std::deque<std::string> &params)
{
	if (params.size() < 4)
		return false;

	irc::string servername = params[0].c_str();
	std::string sname = params[0];
	std::string password = params[1];
	int hops = atoi(params[2].c_str());

	if (hops)
	{
		this->WriteLine("ERROR :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;
	}
	std::string description = params[3];
	for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
	{
		if ((x->Name == servername) && (x->RecvPass == password))
		{
			TreeServer* CheckDupe = Utils->FindServer(sname);
			if (CheckDupe)
			{
				this->WriteLine("ERROR :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;
			}
			// Begin the sync here. this kickstarts the
			// other side, waiting in WAIT_AUTH_2 state,
			// into starting their burst, as it shows
			// that we're happy.
			this->LinkState = CONNECTED;
			// we should add the details of this server now
			// to the servers tree, as a child of the root
			// node.
			TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
			Utils->TreeRoot->AddChild(Node);
			params[3] = ":" + params[3];
			Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
			this->bursting = true;
			this->DoBurst(Node);
			return true;
		}
	}
	this->WriteLine("ERROR :Invalid credentials");
	this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
	return false;
}

bool TreeSocket::Inbound_Server(std::deque<std::string> &params)
{
	if (params.size() < 4)
		return false;
	irc::string servername = params[0].c_str();
	std::string sname = params[0];
	std::string password = params[1];
	int hops = atoi(params[2].c_str());

	if (hops)
	{
		this->WriteLine("ERROR :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;
	}
	std::string description = params[3];
	for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
	{
		if ((x->Name == servername) && (x->RecvPass == password))
		{
			TreeServer* CheckDupe = Utils->FindServer(sname);
			if (CheckDupe)
			{
				this->WriteLine("ERROR :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 = InspSocketNameRequest((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->InboundServerName = sname;
			this->InboundDescription = description;
			// 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+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
			// move to the next state, we are now waiting for THEM.
			this->LinkState = WAIT_AUTH_2;
			return true;
		}
	}
	this->WriteLine("ERROR :Invalid credentials");
	this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
	return false;
}

void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
{
	n.clear();
	irc::tokenstream tokens(line);
	std::string param;
	while ((param = tokens.GetToken()) != "")
		n.push_back(param);
	return;
}

bool TreeSocket::ProcessLine(std::string &line)
{
	std::deque<std::string> params;
	irc::string command;
	std::string prefix;

	line = line.substr(0, line.find_first_of("\r\n"));

	if (line.empty())
		return true;

	Instance->Log(DEBUG, "<- %s", line.c_str());

	this->Split(line.c_str(),params);

	if ((params[0][0] == ':') && (params.size() > 1))
	{
		prefix = params[0].substr(1);
		params.pop_front();
	}
	command = params[0].c_str();
	params.pop_front();
	switch (this->LinkState)
	{
		TreeServer* Node;

		case WAIT_AUTH_1:
			// Waiting for SERVER command from remote server. Server initiating
			// the connection sends the first SERVER command, listening server
			// replies with theirs if its happy, then if the initiator is happy,
			// it starts to send its net sync, which starts the merge, otherwise
			// it sends an ERROR.
			if (command == "PASS")
			{
				/* Silently ignored */
			}
			else if (command == "SERVER")
			{
				return this->Inbound_Server(params);
			}
			else if (command == "ERROR")
			{
				return this->Error(params);
			}
			else if (command == "USER")
			{
				this->WriteLine("ERROR :Client connections to this port are prohibited.");
				return false;
			}
			else if (command == "CAPAB")
			{
				return this->Capab(params);
			}
			else if ((command == "U") || (command == "S"))
			{
				this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
				return false;
			}
			else
			{
				std::string error("ERROR :Invalid command in negotiation phase: ");
				error.append(command.c_str());
				this->WriteLine(error);
				return false;
			}
		break;
		case WAIT_AUTH_2:
			// Waiting for start of other side's netmerge to say they liked our
			// password.
			if (command == "SERVER")
			{
				// cant do this, they sent it to us in the WAIT_AUTH_1 state!
				// silently ignore.
				return true;
			}
			else if ((command == "U") || (command == "S"))
			{
				this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
				return false;
			}
			else if (command == "BURST")
			{
				if (params.size() && Utils->EnableTimeSync)
				{
					/* If a time stamp is provided, apply synchronization */
					bool force = false;
					time_t them = atoi(params[0].c_str());
					time_t us = Instance->Time(true);
					int delta = them - us;
					if ((params.size() == 2) && (params[1] == "FORCE"))
						force = true;
					if ((delta < -600) || (delta > 600))
					{
						this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
						this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
						return false;
					}

					if (force || (us > them))
					{
						this->Instance->SetTimeDelta(them - us);
						// Send this new timestamp to any other servers
						Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
					}
					else
					{
						// Override the timestamp
						this->WriteLine(":" + Utils->TreeRoot->GetName() + " TIMESET " + ConvToStr(us));
					}
				}
				this->LinkState = CONNECTED;
				Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
				Utils->TreeRoot->AddChild(Node);
				params.clear();
				params.push_back(InboundServerName);
				params.push_back("*");
				params.push_back("1");
				params.push_back(":"+InboundDescription);
				Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
				this->bursting = true;
				this->DoBurst(Node);
			}
			else if (command == "ERROR")
			{
				return this->Error(params);
			}
			else if (command == "CAPAB")
			{
				return this->Capab(params);
			}

		break;
		case LISTENER:
			this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
			return false;
		break;
		case CONNECTING:
			if (command == "SERVER")
			{
				// another server we connected to, which was in WAIT_AUTH_1 state,
				// has just sent us their credentials. If we get this far, theyre
				// happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
				// if we're happy with this, we should send our netburst which
				// kickstarts the merge.
				return this->Outbound_Reply_Server(params);
			}
			else if (command == "ERROR")
			{
				return this->Error(params);
			}
		break;
		case CONNECTED:
			// This is the 'authenticated' state, when all passwords
			// have been exchanged and anything past this point is taken
			// as gospel.

			if (prefix != "")
			{
				std::string direction = prefix;
				userrec* t = this->Instance->FindNick(prefix);
				if (t)
				{
					direction = t->server;
				}
				TreeServer* route_back_again = Utils->BestRouteTo(direction);
				if ((!route_back_again) || (route_back_again->GetSocket() != this))
				{
					if (route_back_again)
						Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
					return true;
				}
				/* Fix by brain:
				 * When there is activity on the socket, reset the ping counter so
				 * that we're not wasting bandwidth pinging an active server.
				 */
				route_back_again->SetNextPingTime(time(NULL) + 60);
				route_back_again->SetPingFlag();
			}

			if (command == "SVSMODE")
			{
				/* Services expects us to implement
				 * SVSMODE. In inspircd its the same as
				 * MODE anyway.
				 */
				command = "MODE";
			}
			std::string target = "";
			/* Yes, know, this is a mess. Its reasonably fast though as we're
			 * working with std::string here.
			 */
			if ((command == "NICK") && (params.size() > 1))
			{
				return this->IntroduceClient(prefix,params);
			}
			else if (command == "FJOIN")
			{
				return this->ForceJoin(prefix,params);
			}
			else if (command == "STATS")
			{
				return this->Stats(prefix, params);
			}
			else if (command == "MOTD")
			{
				return this->Motd(prefix, params);
			}
			else if (command == "ADMIN")
			{
				return this->Admin(prefix, params);
			}
			else if (command == "SERVER")
			{
				return this->RemoteServer(prefix,params);
			}
			else if (command == "ERROR")
			{
				return this->Error(params);
			}
			else if (command == "OPERTYPE")
			{
				return this->OperType(prefix,params);
			}
			else if (command == "FMODE")
			{
				return this->ForceMode(prefix,params);
			}
			else if (command == "KILL")
			{
				return this->RemoteKill(prefix,params);
			}
			else if (command == "FTOPIC")
			{
				return this->ForceTopic(prefix,params);
			}
			else if (command == "REHASH")
			{
				return this->RemoteRehash(prefix,params);
			}
			else if (command == "METADATA")
			{
				return this->MetaData(prefix,params);
			}
			else if (command == "REMSTATUS")
			{
				return this->RemoveStatus(prefix,params);
			}
			else if (command == "PING")
			{
				/*
				 * We just got a ping from a server that's bursting.
				 * This can't be right, so set them to not bursting, and
				 * apply their lines.
				 */
				if (this->bursting)
				{
					this->bursting = false;
					Instance->XLines->apply_lines(Utils->lines_to_apply);
					Utils->lines_to_apply = 0;
				}
				if (prefix == "")
				{
					prefix = this->GetName();
				}
				return this->LocalPing(prefix,params);
			}
			else if (command == "PONG")
			{
				/*
				 * We just got a pong from a server that's bursting.
				 * This can't be right, so set them to not bursting, and
				 * apply their lines.
				 */
				if (this->bursting)
				{
					this->bursting = false;
					Instance->XLines->apply_lines(Utils->lines_to_apply);
					Utils->lines_to_apply = 0;
				}
				if (prefix == "")
				{
					prefix = this->GetName();
				}
				return this->LocalPong(prefix,params);
			}
			else if (command == "VERSION")
			{
				return this->ServerVersion(prefix,params);
			}
			else if (command == "FHOST")
			{
				return this->ChangeHost(prefix,params);
			}
			else if (command == "FNAME")
			{
				return this->ChangeName(prefix,params);
			}
			else if (command == "ADDLINE")
			{
				return this->AddLine(prefix,params);
			}
			else if (command == "SVSNICK")
			{
				if (prefix == "")
				{
					prefix = this->GetName();
				}
				return this->ForceNick(prefix,params);
			}
			else if (command == "RSQUIT")
			{
				return this->RemoteSquit(prefix, params);
			}
			else if (command == "IDLE")
			{
				return this->Whois(prefix,params);
			}
			else if (command == "PUSH")
			{
				return this->Push(prefix,params);
			}
			else if (command == "TIMESET")
			{
				return this->HandleSetTime(prefix, params);
			}
			else if (command == "TIME")
			{
				return this->Time(prefix,params);
			}
			else if ((command == "KICK") && (Utils->IsServer(prefix)))
			{
				std::string sourceserv = this->myhost;
				if (params.size() == 3)
				{
					userrec* user = this->Instance->FindNick(params[1]);
					chanrec* chan = this->Instance->FindChan(params[0]);
					if (user && chan)
					{
						if (!chan->ServerKickUser(user, params[2].c_str(), false))
							/* Yikes, the channels gone! */
							delete chan;
					}
				}
				if (this->InboundServerName != "")
				{
					sourceserv = this->InboundServerName;
				}
				return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
			}
			else if (command == "SVSJOIN")
			{
				if (prefix == "")
				{
					prefix = this->GetName();
				}
				return this->ServiceJoin(prefix,params);
			}
			else if (command == "SQUIT")
			{
				if (params.size() == 2)
				{
					this->Squit(Utils->FindServer(params[0]),params[1]);
				}
				return true;
			}
			else if (command == "OPERNOTICE")
			{
				std::string sourceserv = this->myhost;
				if (this->InboundServerName != "")
					sourceserv = this->InboundServerName;
				if (params.size() >= 1)
					Instance->WriteOpers("*** From " + sourceserv + ": " + params[0]);
				return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
			}
			else if (command == "MODENOTICE")
			{
				std::string sourceserv = this->myhost;
				if (this->InboundServerName != "")
					sourceserv = this->InboundServerName;
				if (params.size() >= 2)
				{
					Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", sourceserv.c_str(), params[1].c_str());
				}
				return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
			}
			else if (command == "SNONOTICE")
			{
				std::string sourceserv = this->myhost;
				if (this->InboundServerName != "")
					sourceserv = this->InboundServerName;
				if (params.size() >= 2)
				{
					Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + sourceserv + ": "+ params[1]);
				}
				return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
			}
			else if (command == "ENDBURST")
			{
				this->bursting = false;
				Instance->XLines->apply_lines(Utils->lines_to_apply);
				Utils->lines_to_apply = 0;
				std::string sourceserv = this->myhost;
				if (this->InboundServerName != "")
				{
					sourceserv = this->InboundServerName;
				}
				this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());

				Event rmode((char*)sourceserv.c_str(), (Module*)Utils->Creator, "new_server");
				rmode.Send(Instance);

				return true;
			}
			else
			{
				// not a special inter-server command.
				// Emulate the actual user doing the command,
				// this saves us having a huge ugly parser.
				userrec* who = this->Instance->FindNick(prefix);
				std::string sourceserv = this->myhost;
				if (this->InboundServerName != "")
				{
					sourceserv = this->InboundServerName;
				}
				if ((!who) && (command == "MODE"))
				{
					if (Utils->IsServer(prefix))
					{
						const char* modelist[127];
						for (size_t i = 0; i < params.size(); i++)
							modelist[i] = params[i].c_str();
						userrec* fake = new userrec(Instance);
						fake->SetFd(FD_MAGIC_NUMBER);
						this->Instance->SendMode(modelist, params.size(), fake);

						delete fake;
						/* Hot potato! pass it on! */
						return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
					}
				}
				if (who)
				{
					if ((command == "NICK") && (params.size() > 0))
					{
						/* On nick messages, check that the nick doesnt
						 * already exist here. If it does, kill their copy,
						 * and our copy.
						 */
						userrec* x = this->Instance->FindNick(params[0]);
						if ((x) && (x != who))
						{
							std::deque<std::string> p;
							p.push_back(params[0]);
							p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
							Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
							p.clear();
							p.push_back(prefix);
							p.push_back("Nickname collision");
							Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
							userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
							userrec* y = this->Instance->FindNick(prefix);
							if (y)
							{
								userrec::QuitUser(this->Instance,y,"Nickname collision");
							}
							return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
						}
					}
					// its a user
					target = who->server;
					const char* strparams[127];
					for (unsigned int q = 0; q < params.size(); q++)
					{
						strparams[q] = params[q].c_str();
					}
					switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
					{
						case CMD_INVALID:
							this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
							return false;
						break;
						case CMD_FAILURE:
							return true;
						break;
						default:
							/* CMD_SUCCESS and CMD_USER_DELETED fall through here */
						break;
					}
				}
				else
				{
					// its not a user. Its either a server, or somethings screwed up.
					if (Utils->IsServer(prefix))
						target = this->Instance->Config->ServerName;
					else
						return true;
				}
				return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);

			}
			return true;
		break;
	}
	return true;
}

std::string TreeSocket::GetName()
{
	std::string sourceserv = this->myhost;
	if (this->InboundServerName != "")
	{
		sourceserv = this->InboundServerName;
	}
	return sourceserv;
}

void TreeSocket::OnTimeout()
{
	if (this->LinkState == CONNECTING)
	{
		this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
		Link* MyLink = Utils->FindLink(myhost);
		if (MyLink)
			Utils->DoFailOver(MyLink);
	}
}

void TreeSocket::OnClose()
{
	// Connection closed.
	// If the connection is fully up (state CONNECTED)
	// then propogate a netsplit to all peers.
	std::string quitserver = this->myhost;
	if (this->InboundServerName != "")
	{
		quitserver = this->InboundServerName;
	}
	TreeServer* s = Utils->FindServer(quitserver);
	if (s)
	{
		Squit(s,"Remote host closed the connection");
	}

	if (quitserver != "")
		this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
}

int TreeSocket::OnIncomingConnection(int newsock, char* ip)
{
	/* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
	 * or discovering if this port is the server port, we don't allow connections from any
	 * IPs for which we don't have a link block.
	 */
	bool found = false;

	found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
	if (!found)
	{
		for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
			if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
				found = true;

		if (!found)
		{
			this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
			close(newsock);
			return false;
		}
	}

	TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip, this->Hook);
	s = s; /* Whinge whinge whinge, thats all GCC ever does. */
	return true;
}