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treesocket2.cpp

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/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
 * See: http://www.inspircd.org/wiki/index.php/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#include "inspircd.h"
#include "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 "wildcard.h"
#include "xline.h"
#include "transport.h"
#include "socketengine.h"

#include "m_spanningtree/main.h"
#include "m_spanningtree/utils.h"
#include "m_spanningtree/treeserver.h"
#include "m_spanningtree/link.h"
#include "m_spanningtree/treesocket.h"
#include "m_spanningtree/resolvers.h"
#include "m_spanningtree/handshaketimer.h"

/* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h */

static std::map<std::string, std::string> warned;       /* Server names that have had protocol violation warnings displayed for them */

void TreeSocket::WriteLine(std::string line)
{
        Instance->Log(DEBUG, "S[%d] -> %s", this->GetFd(), line.c_str());
        line.append("\r\n");
        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.empty() ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
        /* we will return false to cause the socket to close. */
        return false;
}

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

        if (!this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
        {
                /* Pass it on, not for us */
                Utils->DoOneToOne(prefix, "MODULES", params, params[0]);
                return true;
        }

        char strbuf[MAXBUF];
        std::deque<std::string> par;
        par.push_back(prefix);
        par.push_back("");

        userrec* source = this->Instance->FindNick(prefix);
        if (!source)
                return true;

        for (unsigned int i = 0; i < Instance->Config->module_names.size(); i++)
        {
                Version V = Instance->modules[i]->GetVersion();
                char modulename[MAXBUF];
                char flagstate[MAXBUF];
                *flagstate = 0;
                if (V.Flags & VF_STATIC)
                        strlcat(flagstate,", static",MAXBUF);
                if (V.Flags & VF_VENDOR)
                        strlcat(flagstate,", vendor",MAXBUF);
                if (V.Flags & VF_COMMON)
                        strlcat(flagstate,", common",MAXBUF);
                if (V.Flags & VF_SERVICEPROVIDER)
                        strlcat(flagstate,", service provider",MAXBUF);
                if (!flagstate[0])
                        strcpy(flagstate,"  <no flags>");
                strlcpy(modulename,Instance->Config->module_names[i].c_str(),256);
                if (*source->oper)
                {
                        snprintf(strbuf, MAXBUF, "::%s 702 %s :0x%08lx %d.%d.%d.%d %s (%s)",Instance->Config->ServerName,source->nick,(long unsigned int)Instance->modules[i],V.Major,V.Minor,V.Revision,V.Build,ServerConfig::CleanFilename(modulename),flagstate+2);
                }
                else
                {
                        snprintf(strbuf, MAXBUF, "::%s 702 %s :%s",Instance->Config->ServerName,source->nick,ServerConfig::CleanFilename(modulename));
                }
                par[1] = strbuf;
                Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
        }
        snprintf(strbuf, MAXBUF, "::%s 703 %s :End of MODULES list", Instance->Config->ServerName, source->nick);
        par[1] = strbuf;
        Utils->DoOneToOne(Instance->Config->ServerName, "PUSH", par, source->server);
        return true;
}

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;
}

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;
}


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)
        {
                if (!IS_OPER(u))
                        this->Instance->all_opers.push_back(u);
                u->modes[UM_OPERATOR] = 1;
                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;
}

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;
}

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

        userrec* u = this->Instance->FindNick(prefix);

        if (u)
        {
                u->SetOperQuit(params[0]);
                params[0] = ":" + params[0];
                Utils->DoOneToAllButSender(prefix,"OPERQUIT",params,prefix);
        }
        return true;
}

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

        if (!this->Instance->IsChannel(params[1].c_str()))
                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, "", Instance->Time());
                Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
        }
        return true;
}

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

        if (!this->Instance->IsChannel(params[1].c_str()))
                return true;

        userrec* u = this->Instance->FindNick(params[0]);
        chanrec* c = this->Instance->FindChan(params[1]);

        if (u)
        {
                /* only part if it's local, otherwise just pass it on! */
                if (IS_LOCAL(u))
                        if (!c->PartUser(u, "Services forced part"))
                                delete c;
                Utils->DoOneToAllButSender(prefix,"SVSPART",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];
        std::string parameter;

        if (params.size() > 1)
        {
                parameter = params[1];
        }

        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(true);
                FOREACH_MOD_I(this->Instance, I_OnRehash, OnRehash(NULL, parameter));
                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;

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

        if (who)
        {
                /* Prepend kill source, if we don't have one -- '[' is check for older 1.1 servers, and services, that prefix reason with servername. */
                if ((*(params[1].c_str()) != 'K') && (*(params[1].c_str()) != '['))
                {
                        params[1] = "Killed (" + params[1] +")";
                }
                std::string reason = params[1];
                params[1] = ":" + params[1];
                Utils->DoOneToAllButSender(prefix,"KILL",params,prefix);
                // NOTE: This is safe with kill hiding on, as RemoteKill is only reached if we have a server prefix.
                // in short this is not executed for USERS.
                who->Write(":%s KILL %s :%s (%s)", prefix.c_str(), who->nick, prefix.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();
                        timeval t;
                        gettimeofday(&t, NULL);
                        long ts = (t.tv_sec * 1000) + (t.tv_usec / 1000);
                        ServerSource->rtt = ts - ServerSource->LastPingMsec;
                }
        }
        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() < 2)
                return true;
        else if (params.size() < 3)
                params.push_back("");
        TreeServer* ServerSource = Utils->FindServer(prefix);
        if (ServerSource)
        {
                Utils->SetRemoteBursting(ServerSource, false);

                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()))
                {
                        time_t c_requires_crap = ConvToInt(params[4]) + Instance->Time();
                        this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),Instance->TimeString(c_requires_crap).c_str(),params[5].c_str());
                }
                else
                {
                        this->Instance->SNO->WriteToSnoMask('x',"%s Added permanent %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
                                if (x)
                                        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
                                if (who_to_send_to)
                                        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 them = atoi(params[0].c_str());
        time_t us = Instance->Time(false);

        time_t diff = them - us;

        Utils->DoOneToAllButSender(prefix, "TIMESET", params, prefix);

        if (force || (them != us))
        {
                time_t old = Instance->SetTimeDelta(diff);
                Instance->Log(DEBUG, "TS (diff %d) from %s applied (old delta was %d)", diff, prefix.c_str(), old);
        }

        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)
        {
                for (char modeletter = 'A'; modeletter <= 'z'; modeletter++)
                {
                        ModeHandler* mh = Instance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
                        if (mh)
                                mh->RemoveMode(c);
                }
        }
        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->SendError("Protocol error - Introduced remote server from unknown server "+prefix);
                return false;
        }
        TreeServer* CheckDupe = Utils->FindServer(servername);
        if (CheckDupe)
        {
                this->SendError("Server "+servername+" already exists!");
                this->Instance->SNO->WriteToSnoMask('l',"Server \2"+servername+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
                return false;
        }
        Link* lnk = Utils->FindLink(servername);
        TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL, lnk ? lnk->Hidden : false);
        ParentOfThis->AddChild(Node);
        params[3] = ":" + params[3];
        Utils->SetRemoteBursting(Node, true);
        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::ComparePass(const std::string &ours, const std::string &theirs)
{
        if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
        {
                /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
                 * We can't allow this password as valid.
                 */
                if (!Instance->FindModule("m_sha256.so") || !Utils->ChallengeResponse)
                                return false;
                else
                        /* Straight string compare of hashes */
                        return ours == theirs;
        }
        else
                /* Straight string compare of plaintext */
                return ours == theirs;
}

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];
        std::string description = params[3];
        int hops = atoi(params[2].c_str());

        this->InboundServerName = sname;
        this->InboundDescription = description;

        if (!sentcapab)
                this->SendCapabilities();

        if (hops)
        {
                this->SendError("Server too far away for authentication");
                this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
                return false;
        }

        for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
        {
                if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password)) || (x->RecvPass == password && (this->GetTheirChallenge().empty()))))
                {
                        TreeServer* CheckDupe = Utils->FindServer(sname);
                        if (CheckDupe)
                        {
                                this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
                                this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
                                return false;
                        }
                        // 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,x->Hidden);
                        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->SendError("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];
        std::string description = params[3];
        int hops = atoi(params[2].c_str());

        this->InboundServerName = sname;
        this->InboundDescription = description;

        if (!sentcapab)
                this->SendCapabilities();

        if (hops)
        {
                this->SendError("Server too far away for authentication");
                this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
                return false;
        }

        for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
        {
                if ((x->Name == servername) && ((ComparePass(this->MakePass(x->RecvPass,this->GetOurChallenge()),password) || x->RecvPass == password && (this->GetTheirChallenge().empty()))))
                {
                        /* First check for instances of the server that are waiting between the inbound and outbound SERVER command */
                        TreeSocket* CheckDupeSocket = Utils->FindBurstingServer(sname);
                        if (CheckDupeSocket)
                        {
                                /* If we find one, we abort the link to prevent a race condition */
                                this->SendError("Negotiation collision");
                                this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists in a negotiating state.");
                                CheckDupeSocket->SendError("Negotiation collision");
                                Instance->SE->DelFd(CheckDupeSocket);
                                CheckDupeSocket->Close();
                                return false;
                        }
                        /* Now check for fully initialized instances of the server */
                        TreeServer* CheckDupe = Utils->FindServer(sname);
                        if (CheckDupe)
                        {
                                this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
                                this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
                                return false;
                        }
                        this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
                        if (this->Hook)
                        {
                                std::string name = 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");
                        }

                        Utils->AddBurstingServer(sname,this);

                        // this is good. Send our details: Our server name and description and hopcount of 0,
                        // along with the sendpass from this block.
                        this->SendCapabilities();
                        this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+this->MakePass(x->SendPass, this->GetTheirChallenge())+" 0 :"+this->Instance->Config->ServerDesc);
                        // move to the next state, we are now waiting for THEM.
                        this->LinkState = WAIT_AUTH_2;
                        return true;
                }
        }
        this->SendError("Invalid credentials");
        this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
        return false;
}

void TreeSocket::Split(const std::string &line, std::deque<std::string> &n)
{
        n.clear();
        irc::tokenstream tokens(line);
        std::string param;
        while (tokens.GetToken(param))
        {
                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[%d] <- %s", this->GetFd(), line.c_str());

        this->Split(line.c_str(),params);
        
        if (params.empty())
                return true;
        
        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->SendError("Client connections to this port are prohibited.");
                                return false;
                        }
                        else if (command == "CAPAB")
                        {
                                return this->Capab(params);
                        }
                        else if ((command == "U") || (command == "S"))
                        {
                                this->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
                                return false;
                        }
                        else
                        {
                                irc::string error = "Invalid command in negotiation phase: " + command;
                                this->SendError(assign(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->SendError("Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
                                return false;
                        }
                        else if (command == "BURST")
                        {
                                if (params.size() && Utils->EnableTimeSync)
                                {
                                        bool we_have_delta = (Instance->Time(false) != Instance->Time(true));
                                        time_t them = atoi(params[0].c_str());
                                        time_t delta = them - Instance->Time(false);
                                        if ((delta < -300) || (delta > 300))
                                        {
                                                Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than five minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
                                                SendError("Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
                                                return false;
                                        }
                                        else if ((delta < -30) || (delta > 30))
                                        {
                                                Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs(delta));
                                        }

                                        if (!Utils->MasterTime && !we_have_delta)
                                        {
                                                this->Instance->SetTimeDelta(delta);
                                                // Send this new timestamp to any other servers
                                                Utils->DoOneToMany(Utils->TreeRoot->GetName(), "TIMESET", params);
                                        }
                                }
                                this->LinkState = CONNECTED;
                                TreeServer* CheckDupe = Utils->FindServer(InboundServerName);
                                if (CheckDupe)
                                {
                                        this->SendError("Server "+InboundServerName+" already exists!");
                                        this->Instance->SNO->WriteToSnoMask('l',"Server \2"+InboundServerName+"\2 being introduced from \2" + prefix + "\2 denied, already exists. Closing link with " + prefix);
                                        return false;
                                }
                                Link* lnk = Utils->FindLink(InboundServerName);
                                Node = new TreeServer(this->Utils,this->Instance, InboundServerName, InboundDescription, Utils->TreeRoot, this, lnk ? lnk->Hidden : false);
                                Utils->DelBurstingServer(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->SendError("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);
                        }
                        else if (command == "CAPAB")
                        {
                                return this->Capab(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.empty())
                        {
                                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) + Utils->PingFreq);
                                route_back_again->SetPingFlag();
                        }
                        else
                        {
                                prefix = this->GetName();
                        }

                        if ((command == "MODE") && (params.size() >= 2))
                        {
                                chanrec* channel = Instance->FindChan(params[0]);
                                if (channel)
                                {
                                        userrec* x = Instance->FindNick(prefix);
                                        if (x)
                                        {
                                                if (warned.find(x->server) == warned.end())
                                                {
                                                        Instance->Log(DEFAULT,"WARNING: I revceived modes '%s' from another server '%s'. This is not compliant with InspIRCd. Please check that server for bugs.", params[1].c_str(), x->server);
                                                        Instance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending nonstandard modes: '%s MODE %s' where FMODE should be used, and may cause desyncs.", x->server, x->nick, params[1].c_str());
                                                        warned[x->server] = x->nick;
                                                }
                                        }
                                }
                        }

                        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() >= 8))
                        {
                                return this->IntroduceClient(prefix,params);
                        }
                        else if (command == "FJOIN")
                        {
                                TreeServer* ServerSource = Utils->FindServer(prefix);
                                if (ServerSource)
                                        Utils->SetRemoteBursting(ServerSource, false);
                                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 == "KILL" && Utils->IsServer(prefix))
                        {
                                return this->RemoteKill(prefix,params);
                        }
                        else if (command == "MODULES")
                        {
                                return this->Modules(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")
                        {
                                TreeServer* ServerSource = Utils->FindServer(prefix);
                                if (ServerSource)
                                        Utils->SetRemoteBursting(ServerSource, false);
                                return this->ForceMode(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")
                        {
                                if (prefix.empty())
                                        prefix = this->GetName();
                                /*
                                 * 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.
                                 */
                                TreeServer* ServerSource = Utils->FindServer(prefix);
                                if (ServerSource)
                                        Utils->SetRemoteBursting(ServerSource, false);

                                if (this->bursting)
                                {
                                        this->bursting = false;
                                        Instance->XLines->apply_lines(Utils->lines_to_apply);
                                        Utils->lines_to_apply = 0;
                                }

                                return this->LocalPing(prefix,params);
                        }
                        else if (command == "PONG")
                        {
                                if (prefix.empty())
                                        prefix = this->GetName();
                                /*
                                 * 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.
                                 */
                                TreeServer* ServerSource = Utils->FindServer(prefix);
                                if (ServerSource)
                                        Utils->SetRemoteBursting(ServerSource, false);

                                if (this->bursting)
                                {
                                        this->bursting = false;
                                        Instance->XLines->apply_lines(Utils->lines_to_apply);
                                        Utils->lines_to_apply = 0;
                                }

                                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")
                        {
                                TreeServer* ServerSource = Utils->FindServer(prefix);
                                if (ServerSource)
                                        Utils->SetRemoteBursting(ServerSource, false);
                                return this->AddLine(prefix,params);
                        }
                        else if (command == "SVSNICK")
                        {
                                if (prefix.empty())
                                {
                                        prefix = this->GetName();
                                }
                                return this->ForceNick(prefix,params);
                        }
                        else if (command == "OPERQUIT")
                        {
                                return this->OperQuit(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.empty())
                                {
                                        sourceserv = this->InboundServerName;
                                }
                                return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
                        }
                        else if (command == "SVSJOIN")
                        {
                                if (prefix.empty())
                                {
                                        prefix = this->GetName();
                                }
                                return this->ServiceJoin(prefix,params);
                        }
                        else if (command == "SVSPART")
                        {
                                if (prefix.empty())
                                        prefix = this->GetName();
                                return this->ServicePart(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.empty())
                                        sourceserv = this->InboundServerName;
                                if (params.size() >= 1)
                                        Instance->WriteOpers("*** From " + prefix + ": " + params[0]);
                                return Utils->DoOneToAllButSenderRaw(line, sourceserv, prefix, command, params);
                        }
                        else if (command == "MODENOTICE")
                        {
                                std::string sourceserv = this->myhost;
                                if (!this->InboundServerName.empty())
                                        sourceserv = this->InboundServerName;
                                if (params.size() >= 2)
                                {
                                        Instance->WriteMode(params[0].c_str(), WM_AND, "*** From %s: %s", prefix.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.empty())
                                        sourceserv = this->InboundServerName;
                                if (params.size() >= 2)
                                {
                                        Instance->SNO->WriteToSnoMask(*(params[0].c_str()), "From " + prefix + ": "+ 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.empty())
                                        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.empty())
                                {
                                        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->SendError("Unrecognised or malformed 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.empty())
        {
                sourceserv = this->InboundServerName;
        }
        return sourceserv;
}

void TreeSocket::OnTimeout()
{
        if (this->LinkState == CONNECTING)
        {
                Utils->Creator->RemoteMessage(NULL, "CONNECT: Connection to \002%s\002 timed out.", myhost.c_str());
                Link* MyLink = Utils->FindLink(myhost);
                if (MyLink)
                        Utils->DoFailOver(MyLink);
        }
}

void TreeSocket::OnClose()
{
        // Test fix for big fuckup
        if (this->LinkState != CONNECTED)
                return;

        // 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.empty())
        {
                quitserver = this->InboundServerName;
        }
        TreeServer* s = Utils->FindServer(quitserver);
        if (s)
        {
                Squit(s,"Remote host closed the connection");
        }

        if (!quitserver.empty())
        {
                Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' failed.",quitserver.c_str());
                time_t server_uptime = Instance->Time() - this->age;    
                if (server_uptime)
                        Utils->Creator->RemoteMessage(NULL,"Connection to '\2%s\2' was established for %s", quitserver.c_str(), Utils->Creator->TimeToStr(server_uptime).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('d',"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;
}