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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"
#include "remoteuser.h"
CmdResult CommandUID::HandleServer(TreeServer* remoteserver, CommandBase::Params& params)
{
/**
* 0 1 2 3 4 5 6 7 8 9 (n-1)
* UID uuid age nick host dhost ident ip.string signon +modes (modepara) :real
*/
time_t age_t = ServerCommand::ExtractTS(params[1]);
time_t signon = ServerCommand::ExtractTS(params[7]);
std::string empty;
const std::string& modestr = params[8];
// Check if the length of the uuid is correct and confirm the sid portion of the uuid matches the sid of the server introducing the user
if (params[0].length() != UIDGenerator::UUID_LENGTH || params[0].compare(0, 3, remoteserver->GetId()))
throw ProtocolException("Bogus UUID");
// Sanity check on mode string: must begin with '+'
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
LocalUser* const localuser = static_cast<LocalUser*>(collideswith);
localuser->OverruleNick();
}
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], "UID");
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];
}
}
/* For remote users, we pass the UUID they sent to the constructor.
* If the UUID already exists User::User() throws an exception which causes this connection to be closed.
*/
RemoteUser* _new = new SpanningTree::RemoteUser(params[0], remoteserver);
ServerInstance->Users->clientlist[params[2]] = _new;
_new->nick = params[2];
_new->ChangeRealHost(params[3], false);
_new->ChangeDisplayedHost(params[4]);
_new->ident = params[5];
_new->ChangeRealName(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->NeedsParam(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]);
ServerInstance->Users->AddClone(_new);
remoteserver->UserCount++;
bool dosend = true;
if ((Utils->quiet_bursts && remoteserver->IsBehindBursting()) || _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->GetRealName().c_str());
FOREACH_MOD(OnPostConnect, (_new));
return CMD_SUCCESS;
}
CmdResult CommandFHost::HandleRemote(RemoteUser* src, Params& params)
{
src->ChangeDisplayedHost(params[0]);
return CMD_SUCCESS;
}
CmdResult CommandFIdent::HandleRemote(RemoteUser* src, Params& params)
{
src->ChangeIdent(params[0]);
return CMD_SUCCESS;
}
CmdResult CommandFName::HandleRemote(RemoteUser* src, Params& params)
{
src->ChangeRealName(params[0]);
return CMD_SUCCESS;
}
CommandUID::Builder::Builder(User* user)
: CmdBuilder(TreeServer::Get(user), "UID")
{
push(user->uuid);
push_int(user->age);
push(user->nick);
push(user->GetRealHost());
push(user->GetDisplayedHost());
push(user->ident);
push(user->GetIPString());
push_int(user->signon);
push(user->GetModeLetters(true));
push_last(user->GetRealName());
}
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