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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2014 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2006-2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2004-2008 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 "core_user.h"
CommandMode::CommandMode(Module* parent)
: Command(parent, "MODE", 1)
, seq(0)
{
syntax = "<target> <modes> {<mode-parameters>}";
memset(&sent, 0, sizeof(sent));
}
CmdResult CommandMode::Handle(User* user, const Params& parameters)
{
const std::string& target = parameters[0];
Channel* targetchannel = ServerInstance->FindChan(target);
User* targetuser = NULL;
if (!targetchannel)
{
if (IS_LOCAL(user))
targetuser = ServerInstance->FindNickOnly(target);
else
targetuser = ServerInstance->FindNick(target);
}
if ((!targetchannel) && (!targetuser))
{
if (target[0] == '#')
user->WriteNumeric(Numerics::NoSuchChannel(target));
else
user->WriteNumeric(Numerics::NoSuchNick(target));
return CMD_FAILURE;
}
if (parameters.size() == 1)
{
this->DisplayCurrentModes(user, targetuser, targetchannel);
return CMD_SUCCESS;
}
// Populate a temporary Modes::ChangeList with the parameters
Modes::ChangeList changelist;
ModeType type = targetchannel ? MODETYPE_CHANNEL : MODETYPE_USER;
ServerInstance->Modes.ModeParamsToChangeList(user, type, parameters, changelist);
ModResult MOD_RESULT;
FIRST_MOD_RESULT(OnPreMode, MOD_RESULT, (user, targetuser, targetchannel, changelist));
ModeParser::ModeProcessFlag flags = ModeParser::MODE_NONE;
if (IS_LOCAL(user))
{
if (MOD_RESULT == MOD_RES_PASSTHRU)
{
if ((targetuser) && (user != targetuser))
{
// Local users may only change the modes of other users if a module explicitly allows it
user->WriteNumeric(ERR_USERSDONTMATCH, "Can't change mode for other users");
return CMD_FAILURE;
}
// This is a mode change by a local user and modules didn't explicitly allow/deny.
// Ensure access checks will happen for each mode being changed.
flags |= ModeParser::MODE_CHECKACCESS;
}
else if (MOD_RESULT == MOD_RES_DENY)
return CMD_FAILURE; // Entire mode change denied by a module
}
else
flags |= ModeParser::MODE_LOCALONLY;
if (IS_LOCAL(user))
ServerInstance->Modes->ProcessSingle(user, targetchannel, targetuser, changelist, flags);
else
ServerInstance->Modes->Process(user, targetchannel, targetuser, changelist, flags);
if ((ServerInstance->Modes.GetLastChangeList().empty()) && (targetchannel) && (parameters.size() == 2))
{
/* Special case for displaying the list for listmodes,
* e.g. MODE #chan b, or MODE #chan +b without a parameter
*/
this->DisplayListModes(user, targetchannel, parameters[1]);
}
return CMD_SUCCESS;
}
RouteDescriptor CommandMode::GetRouting(User* user, const Params& parameters)
{
return (IS_LOCAL(user) ? ROUTE_LOCALONLY : ROUTE_BROADCAST);
}
void CommandMode::DisplayListModes(User* user, Channel* chan, const std::string& mode_sequence)
{
seq++;
for (std::string::const_iterator i = mode_sequence.begin(); i != mode_sequence.end(); ++i)
{
unsigned char mletter = *i;
if (mletter == '+')
continue;
ModeHandler* mh = ServerInstance->Modes->FindMode(mletter, MODETYPE_CHANNEL);
if (!mh || !mh->IsListMode())
return;
/* Ensure the user doesnt request the same mode twice,
* so they can't flood themselves off out of idiocy.
*/
if (sent[mletter] == seq)
continue;
sent[mletter] = seq;
ServerInstance->Modes.ShowListModeList(user, chan, mh);
}
}
static std::string GetSnomasks(const User* user)
{
ModeHandler* const snomask = ServerInstance->Modes.FindMode('s', MODETYPE_USER);
std::string snomaskstr = snomask->GetUserParameter(user);
// snomaskstr is empty if the snomask mode isn't set, otherwise it begins with a '+'.
// In the former case output a "+", not an empty string.
if (snomaskstr.empty())
snomaskstr.push_back('+');
return snomaskstr;
}
void CommandMode::DisplayCurrentModes(User* user, User* targetuser, Channel* targetchannel)
{
if (targetchannel)
{
// Display channel's current mode string
user->WriteNumeric(RPL_CHANNELMODEIS, targetchannel->name, (std::string("+") + targetchannel->ChanModes(targetchannel->HasUser(user))));
user->WriteNumeric(RPL_CHANNELCREATED, targetchannel->name, (unsigned long)targetchannel->age);
}
else
{
if (targetuser == user)
{
// Display user's current mode string
user->WriteNumeric(RPL_UMODEIS, targetuser->GetModeLetters());
if (targetuser->IsOper())
user->WriteNumeric(RPL_SNOMASKIS, GetSnomasks(targetuser), "Server notice mask");
}
else if (user->HasPrivPermission("users/auspex"))
{
// Querying the modes of another user.
// We cannot use RPL_UMODEIS because that's only for showing the user's own modes.
user->WriteNumeric(RPL_OTHERUMODEIS, targetuser->nick, targetuser->GetModeLetters());
if (targetuser->IsOper())
user->WriteNumeric(RPL_OTHERSNOMASKIS, targetuser->nick, GetSnomasks(targetuser), "Server notice mask");
}
else
{
user->WriteNumeric(ERR_USERSDONTMATCH, "Can't view modes for other users");
}
}
}
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