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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "commands.h"
#include "utils.h"
#include "treeserver.h"
CmdResult CommandUID::HandleServer(TreeServer* remoteserver, std::vector<std::string>& params)
{
/** Do we have enough parameters:
* 0 1 2 3 4 5 6 7 8 9 (n-1)
* UID uuid age nick host dhost ident ip.string signon +modes (modepara) :gecos
*/
time_t age_t = ServerCommand::ExtractTS(params[1]);
time_t signon = ServerCommand::ExtractTS(params[7]);
std::string empty;
const std::string& modestr = params[8];
/* Is this a valid UID, and not misrouted? */
if (params[0].length() != UIDGenerator::UUID_LENGTH || params[0].compare(0, 3, remoteserver->GetID()))
throw ProtocolException("Bogus UUID");
/* Check parameters for validity before introducing the client, discovered by dmb */
if (modestr[0] != '+')
throw ProtocolException("Invalid mode string");
// See if there is a nick collision
User* collideswith = ServerInstance->FindNickOnly(params[2]);
if ((collideswith) && (collideswith->registered != REG_ALL))
{
// User that the incoming user is colliding with is not fully registered, we force nick change the
// unregistered user to their uuid and tell them what happened
collideswith->WriteFrom(collideswith, "NICK %s", collideswith->uuid.c_str());
collideswith->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname overruled.", collideswith->nick.c_str());
// Clear the bit before calling User::ChangeNick() to make it NOT run the OnUserPostNick() hook
collideswith->registered &= ~REG_NICK;
collideswith->ChangeNick(collideswith->uuid);
}
else if (collideswith)
{
// The user on this side is registered, handle the collision
bool they_change = Utils->DoCollision(collideswith, remoteserver, age_t, params[5], params[6], params[0]);
ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Collision on %s %d", params[2].c_str(), they_change);
if (they_change)
{
// The client being introduced needs to change nick to uuid, change the nick in the message before
// processing/forwarding it. Also change the nick TS to CommandSave::SavedTimestamp.
age_t = CommandSave::SavedTimestamp;
params[1] = ConvToStr(CommandSave::SavedTimestamp);
params[2] = params[0];
}
}
/* IMPORTANT NOTE: For remote users, we pass the UUID in the constructor. This automatically
* sets it up in the UUID hash for us.
*
* If the UUID already exists User::User() throws an exception which causes this connection to be closed.
*/
RemoteUser* _new = new RemoteUser(params[0], remoteserver);
ServerInstance->Users->clientlist[params[2]] = _new;
_new->nick = params[2];
_new->host = params[3];
_new->dhost = params[4];
_new->ident = params[5];
_new->fullname = params.back();
_new->registered = REG_ALL;
_new->signon = signon;
_new->age = age_t;
unsigned int paramptr = 9;
for (std::string::const_iterator v = modestr.begin(); v != modestr.end(); ++v)
{
// Accept more '+' chars, for now
if (*v == '+')
continue;
/* For each mode thats set, find the mode handler and set it on the new user */
ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER);
if (!mh)
throw ProtocolException("Unrecognised mode '" + std::string(1, *v) + "'");
if (mh->GetNumParams(true))
{
if (paramptr >= params.size() - 1)
throw ProtocolException("Out of parameters while processing modes");
std::string mp = params[paramptr++];
/* IMPORTANT NOTE:
* All modes are assumed to succeed here as they are being set by a remote server.
* Modes CANNOT FAIL here. If they DO fail, then the failure is ignored. This is important
* to note as all but one modules currently cannot ever fail in this situation, except for
* m_servprotect which specifically works this way to prevent the mode being set ANYWHERE
* but here, at client introduction. You may safely assume this behaviour is standard and
* will not change in future versions if you want to make use of this protective behaviour
* yourself.
*/
mh->OnModeChange(_new, _new, NULL, mp, true);
}
else
mh->OnModeChange(_new, _new, NULL, empty, true);
_new->SetMode(mh, true);
}
_new->SetClientIP(params[6].c_str());
ServerInstance->Users->AddClone(_new);
remoteserver->UserCount++;
bool dosend = true;
if ((Utils->quiet_bursts && remoteserver->IsBursting()) || _new->server->IsSilentULine())
dosend = false;
if (dosend)
ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s (%s) [%s]", remoteserver->GetName().c_str(), _new->GetFullRealHost().c_str(), _new->GetIPString().c_str(), _new->fullname.c_str());
FOREACH_MOD(OnPostConnect, (_new));
return CMD_SUCCESS;
}
CmdResult CommandFHost::HandleRemote(RemoteUser* src, std::vector<std::string>& params)
{
src->ChangeDisplayedHost(params[0]);
return CMD_SUCCESS;
}
CmdResult CommandFIdent::HandleRemote(RemoteUser* src, std::vector<std::string>& params)
{
src->ChangeIdent(params[0]);
return CMD_SUCCESS;
}
CmdResult CommandFName::HandleRemote(RemoteUser* src, std::vector<std::string>& params)
{
src->ChangeName(params[0]);
return CMD_SUCCESS;
}
CommandUID::Builder::Builder(User* user)
: CmdBuilder(TreeServer::Get(user)->GetID(), "UID")
{
push(user->uuid);
push_int(user->age);
push(user->nick);
push(user->host);
push(user->dhost);
push(user->ident);
push(user->GetIPString());
push_int(user->signon);
push('+').push_raw(user->FormatModes(true));
push_last(user->fullname);
}
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