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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2018-2023 Sadie Powell <sadie@sadiepowell.dev>
* Copyright (C) 2012, 2018 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2006 Craig Edwards <brain@inspircd.org>
*
* 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 "clientprotocolmsg.h"
#include "extension.h"
class ModuleWaitPong final
: public Module
{
private:
bool sendsnotice;
bool killonbadreply;
StringExtItem ext;
public:
ModuleWaitPong()
: Module(VF_VENDOR, "Requires all clients to respond to a PING request before they can fully connect.")
, ext(weak_from_this(), "waitpong-cookie", ExtensionType::USER)
{
}
void ReadConfig(ConfigStatus& status) override
{
const auto& tag = ServerInstance->Config->ConfValue("waitpong");
sendsnotice = tag->getBool("sendsnotice", false);
killonbadreply = tag->getBool("killonbadreply", true);
}
ModResult OnUserRegister(LocalUser* user) override
{
const auto pingcookie = ServerInstance->GenRandomStr(16);
ext.Set(user, pingcookie);
ClientProtocol::Messages::Ping pingmsg(pingcookie);
user->Send(ServerInstance->GetRFCEvents().ping, pingmsg);
if (sendsnotice)
{
user->WriteNotice("*** If you are having problems connecting due to connection timeouts type `/QUOTE PONG {}` or `/RAW PONG {}` now.",
pingcookie, pingcookie);
}
return MOD_RES_PASSTHRU;
}
ModResult OnPreCommand(std::string& command, CommandBase::Params& parameters, LocalUser* user, bool validated) override
{
if (command != "PONG")
return MOD_RES_PASSTHRU; // We don't care about this command.
const auto* pingcookie = ext.Get(user);
if (!pingcookie)
return MOD_RES_PASSTHRU; // User has responded with their ping cookie.
if (!parameters.empty() && *pingcookie == parameters[0])
ext.Unset(user); // The user specified the right ping cookie.
else if (killonbadreply)
ServerInstance->Users.QuitUser(user, "Incorrect ping reply for connection");
return MOD_RES_DENY;
}
ModResult OnCheckReady(LocalUser* user) override
{
return ext.Get(user) ? MOD_RES_DENY : MOD_RES_PASSTHRU;
}
};
MODULE_INIT(ModuleWaitPong)
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