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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2016 Attila Molnar <attilamolnar@hush.com>
*
* 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"
#define INSPIRCD_MONITOR_MANAGER_ONLY
#include "m_monitor.cpp"
enum
{
RPL_GONEAWAY = 598,
RPL_NOTAWAY = 599,
RPL_LOGON = 600,
RPL_LOGOFF = 601,
RPL_WATCHOFF = 602,
RPL_WATCHSTAT = 603,
RPL_NOWON = 604,
RPL_NOWOFF = 605,
RPL_WATCHLIST = 606,
RPL_ENDOFWATCHLIST = 607,
// RPL_CLEARWATCH = 608, // unused
RPL_NOWISAWAY = 609,
ERR_TOOMANYWATCH = 512
};
class CommandWatch : public SplitCommand
{
// Additional penalty for /WATCH commands that request a list from the server
static const unsigned int ListPenalty = 4000;
IRCv3::Monitor::Manager& manager;
static void SendOnlineOffline(LocalUser* user, const std::string& nick, bool show_offline = true)
{
User* target = IRCv3::Monitor::Manager::FindNick(nick);
if (target)
{
// The away state should only be sent if the client requests away notifications for a nick but 2.0 always sends them so we do that too
if (target->IsAway())
user->WriteNumeric(RPL_NOWISAWAY, "%s %s %s %lu :is away", target->nick.c_str(), target->ident.c_str(), target->dhost.c_str(), (unsigned long)target->awaytime);
else
user->WriteNumeric(RPL_NOWON, "%s %s %s %lu :is online", target->nick.c_str(), target->ident.c_str(), target->dhost.c_str(), (unsigned long)target->age);
}
else if (show_offline)
user->WriteNumeric(RPL_NOWOFF, "%s * * 0 :is offline", nick.c_str());
}
void HandlePlus(LocalUser* user, const std::string& nick)
{
IRCv3::Monitor::Manager::WatchResult result = manager.Watch(user, nick, maxwatch);
if (result == IRCv3::Monitor::Manager::WR_TOOMANY)
{
// List is full, send error numeric
user->WriteNumeric(ERR_TOOMANYWATCH, "%s :Too many WATCH entries", nick.c_str());
return;
}
else if (result == IRCv3::Monitor::Manager::WR_INVALIDNICK)
{
user->WriteNumeric(942, "%s :Invalid nickname", nick.c_str());
return;
}
else if (result != IRCv3::Monitor::Manager::WR_OK)
return;
SendOnlineOffline(user, nick);
}
void HandleMinus(LocalUser* user, const std::string& nick)
{
if (!manager.Unwatch(user, nick))
return;
User* target = IRCv3::Monitor::Manager::FindNick(nick);
if (target)
user->WriteNumeric(RPL_WATCHOFF, "%s %s %s %lu :stopped watching", target->nick.c_str(), target->ident.c_str(), target->dhost.c_str(), (unsigned long)target->age);
else
user->WriteNumeric(RPL_WATCHOFF, "%s * * 0 :stopped watching", nick.c_str());
}
void HandleList(LocalUser* user, bool show_offline)
{
user->CommandFloodPenalty += ListPenalty;
const IRCv3::Monitor::WatchedList& list = manager.GetWatched(user);
for (IRCv3::Monitor::WatchedList::const_iterator i = list.begin(); i != list.end(); ++i)
{
const IRCv3::Monitor::Entry* entry = *i;
SendOnlineOffline(user, entry->GetNick(), show_offline);
}
user->WriteNumeric(RPL_ENDOFWATCHLIST, ":End of WATCH list");
}
void HandleStats(LocalUser* user)
{
user->CommandFloodPenalty += ListPenalty;
// Do not show how many clients are watching this nick, it's pointless
const IRCv3::Monitor::WatchedList& list = manager.GetWatched(user);
user->WriteNumeric(RPL_WATCHSTAT, ":You have %lu and are on 0 WATCH entries", (unsigned long)list.size());
Numeric::Builder<' '> out(user, RPL_WATCHLIST);
for (IRCv3::Monitor::WatchedList::const_iterator i = list.begin(); i != list.end(); ++i)
{
const IRCv3::Monitor::Entry* entry = *i;
out.Add(entry->GetNick());
}
out.Flush();
user->WriteNumeric(RPL_ENDOFWATCHLIST, ":End of WATCH S");
}
public:
unsigned int maxwatch;
CommandWatch(Module* mod, IRCv3::Monitor::Manager& managerref)
: SplitCommand(mod, "WATCH")
, manager(managerref)
{
allow_empty_last_param = false;
syntax = "[<C|L|S|l|+<nick1>|-<nick>>]";
}
CmdResult HandleLocal(const std::vector<std::string>& parameters, LocalUser* user)
{
if (parameters.empty())
{
HandleList(user, false);
return CMD_SUCCESS;
}
bool watch_l_done = false;
bool watch_s_done = false;
for (std::vector<std::string>::const_iterator i = parameters.begin(); i != parameters.end(); ++i)
{
const std::string& token = *i;
char subcmd = toupper(token[0]);
if (subcmd == '+')
{
HandlePlus(user, token.substr(1));
}
else if (subcmd == '-')
{
HandleMinus(user, token.substr(1));
}
else if (subcmd == 'C')
{
manager.UnwatchAll(user);
}
else if ((subcmd == 'L') && (!watch_l_done))
{
watch_l_done = true;
// WATCH L requests a full list with online and offline nicks
// WATCH l requests a list with only online nicks
HandleList(user, (token[0] == 'L'));
}
else if ((subcmd == 'S') && (!watch_s_done))
{
watch_s_done = true;
HandleStats(user);
}
}
return CMD_SUCCESS;
}
};
class ModuleWatch : public Module
{
IRCv3::Monitor::Manager manager;
CommandWatch cmd;
void SendAlert(User* user, const std::string& nick, unsigned int numeric, const char* numerictext, time_t shownts)
{
const IRCv3::Monitor::WatcherList* list = manager.GetWatcherList(nick);
if (!list)
return;
std::string text = InspIRCd::Format("%s %s %s %lu :%s", nick.c_str(), user->ident.c_str(), user->dhost.c_str(), (unsigned long) shownts, numerictext);
for (IRCv3::Monitor::WatcherList::const_iterator i = list->begin(); i != list->end(); ++i)
{
LocalUser* curr = *i;
curr->WriteNumeric(numeric, text);
}
}
void Online(User* user)
{
SendAlert(user, user->nick, RPL_LOGON, "arrived online", user->age);
}
void Offline(User* user, const std::string& nick)
{
SendAlert(user, nick, RPL_LOGOFF, "went offline", user->age);
}
public:
ModuleWatch()
: manager(this, "watch")
, cmd(this, manager)
{
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
ConfigTag* tag = ServerInstance->Config->ConfValue("watch");
cmd.maxwatch = tag->getInt("maxwatch", 30, 1);
}
void OnPostConnect(User* user) CXX11_OVERRIDE
{
Online(user);
}
void OnUserPostNick(User* user, const std::string& oldnick) CXX11_OVERRIDE
{
// Detect and ignore nickname case change
if (ServerInstance->FindNickOnly(oldnick) == user)
return;
Offline(user, oldnick);
Online(user);
}
void OnUserQuit(User* user, const std::string& message, const std::string& oper_message) CXX11_OVERRIDE
{
LocalUser* localuser = IS_LOCAL(user);
if (localuser)
manager.UnwatchAll(localuser);
Offline(user, user->nick);
}
ModResult OnSetAway(User* user, const std::string& awaymsg) CXX11_OVERRIDE
{
if (awaymsg.empty())
SendAlert(user, user->nick, RPL_NOTAWAY, "is no longer away", ServerInstance->Time());
else
SendAlert(user, user->nick, RPL_GONEAWAY, awaymsg.c_str(), user->awaytime);
return MOD_RES_PASSTHRU;
}
void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
{
tokens["WATCH"] = ConvToStr(cmd.maxwatch);
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Provides WATCH support", VF_VENDOR);
}
};
MODULE_INIT(ModuleWatch)
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