src/modules/m_timedbans.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2005-2008 Craig Edwards <craigedwards@brainbox.cc>
   6  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
   7  *   Copyright (C) 2006 Robin Burchell <robin+git@viroteck.net>
   8  *
   9  * This file is part of InspIRCd.  InspIRCd is free software: you can
  10  * redistribute it and/or modify it under the terms of the GNU General Public
  11  * License as published by the Free Software Foundation, version 2.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  15  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22
  23 #include "inspircd.h"
  24 #include "listmode.h"
  25
  26 /** Holds a timed ban
  27  */
  28 class TimedBan
  29 {
  30  public:
  31         std::string mask;
  32         time_t expire;
  33         Channel* chan;
  34 };
  35
  36 typedef std::vector<TimedBan> timedbans;
  37 timedbans TimedBanList;
  38
  39 /** Handle /TBAN
  40  */
  41 class CommandTban : public Command
  42 {
  43         ChanModeReference banmode;
  44
  45         bool IsBanSet(Channel* chan, const std::string& mask)
  46         {
  47                 ListModeBase* banlm = static_cast<ListModeBase*>(*banmode);
  48                 if (!banlm)
  49                         return false;
  50                 const ListModeBase::ModeList* bans = banlm->GetList(chan);
  51                 if (bans)
  52                 {
  53                         for (ListModeBase::ModeList::const_iterator i = bans->begin(); i != bans->end(); ++i)
  54                         {
  55                                 const ListModeBase::ListItem& ban = *i;
  56                                 if (!strcasecmp(ban.mask.c_str(), mask.c_str()))
  57                                         return true;
  58                         }
  59                 }
  60
  61                 return false;
  62         }
  63
  64  public:
  65         CommandTban(Module* Creator) : Command(Creator,"TBAN", 3)
  66                 , banmode(Creator, "ban")
  67         {
  68                 syntax = "<channel> <duration> <banmask>";
  69         }
  70
  71         CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE
  72         {
  73                 Channel* channel = ServerInstance->FindChan(parameters[0]);
  74                 if (!channel)
  75                 {
  76                         user->WriteNumeric(Numerics::NoSuchChannel(parameters[0]));
  77                         return CMD_FAILURE;
  78                 }
  79                 unsigned int cm = channel->GetPrefixValue(user);
  80                 if (cm < HALFOP_VALUE)
  81                 {
  82                         user->WriteNumeric(ERR_CHANOPRIVSNEEDED, channel->name, "You do not have permission to set bans on this channel");
  83                         return CMD_FAILURE;
  84                 }
  85
  86                 TimedBan T;
  87                 unsigned long duration;
  88                 if (!InspIRCd::Duration(parameters[1], duration))
  89                 {
  90                         user->WriteNotice("Invalid ban time");
  91                         return CMD_FAILURE;
  92                 }
  93                 unsigned long expire = duration + ServerInstance->Time();
  94                 std::string mask = parameters[2];
  95                 bool isextban = ((mask.size() > 2) && (mask[1] == ':'));
  96                 if (!isextban && !InspIRCd::IsValidMask(mask))
  97                         mask.append("!*@*");
  98
  99                 if (IsBanSet(channel, mask))
 100                 {
 101                         user->WriteNotice("Ban already set");
 102                         return CMD_FAILURE;
 103                 }
 104
 105                 Modes::ChangeList setban;
 106                 setban.push_add(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), mask);
 107                 // Pass the user (instead of ServerInstance->FakeClient) to ModeHandler::Process() to
 108                 // make it so that the user sets the mode themselves
 109                 ServerInstance->Modes->Process(user, channel, NULL, setban);
 110                 if (ServerInstance->Modes->GetLastChangeList().empty())
 111                 {
 112                         user->WriteNotice("Invalid ban mask");
 113                         return CMD_FAILURE;
 114                 }
 115
 116                 T.mask = mask;
 117                 T.expire = expire + (IS_REMOTE(user) ? 5 : 0);
 118                 T.chan = channel;
 119                 TimedBanList.push_back(T);
 120
 121                 const std::string addban = user->nick + " added a timed ban on " + mask + " lasting for " + InspIRCd::DurationString(duration) + ".";
 122                 // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above
 123                 PrefixMode* mh = ServerInstance->Modes->FindPrefixMode('h');
 124                 char pfxchar = (mh && mh->name == "halfop") ? mh->GetPrefix() : '@';
 125
 126                 ClientProtocol::Messages::Privmsg notice(ServerInstance->FakeClient, channel, addban, MSG_NOTICE);
 127                 channel->Write(ServerInstance->GetRFCEvents().privmsg, notice, pfxchar);
 128                 ServerInstance->PI->SendChannelNotice(channel, pfxchar, addban);
 129                 return CMD_SUCCESS;
 130         }
 131
 132         RouteDescriptor GetRouting(User* user, const Params& parameters) CXX11_OVERRIDE
 133         {
 134                 return ROUTE_BROADCAST;
 135         }
 136 };
 137
 138 class BanWatcher : public ModeWatcher
 139 {
 140  public:
 141         BanWatcher(Module* parent)
 142                 : ModeWatcher(parent, "ban", MODETYPE_CHANNEL)
 143         {
 144         }
 145
 146         void AfterMode(User* source, User* dest, Channel* chan, const std::string& banmask, bool adding) CXX11_OVERRIDE
 147         {
 148                 if (adding)
 149                         return;
 150
 151                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end(); ++i)
 152                 {
 153                         if (i->chan != chan)
 154                                 continue;
 155
 156                         const std::string& target = i->mask;
 157                         if (irc::equals(banmask, target))
 158                         {
 159                                 TimedBanList.erase(i);
 160                                 break;
 161                         }
 162                 }
 163         }
 164 };
 165
 166 class ChannelMatcher
 167 {
 168         Channel* const chan;
 169
 170  public:
 171         ChannelMatcher(Channel* ch)
 172                 : chan(ch)
 173         {
 174         }
 175
 176         bool operator()(const TimedBan& tb) const
 177         {
 178                 return (tb.chan == chan);
 179         }
 180 };
 181
 182 class ModuleTimedBans : public Module
 183 {
 184         CommandTban cmd;
 185         BanWatcher banwatcher;
 186
 187  public:
 188         ModuleTimedBans()
 189                 : cmd(this)
 190                 , banwatcher(this)
 191         {
 192         }
 193
 194         void OnBackgroundTimer(time_t curtime) CXX11_OVERRIDE
 195         {
 196                 timedbans expired;
 197                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end();)
 198                 {
 199                         if (curtime > i->expire)
 200                         {
 201                                 expired.push_back(*i);
 202                                 i = TimedBanList.erase(i);
 203                         }
 204                         else
 205                                 ++i;
 206                 }
 207
 208                 for (timedbans::iterator i = expired.begin(); i != expired.end(); i++)
 209                 {
 210                         std::string mask = i->mask;
 211                         Channel* cr = i->chan;
 212                         {
 213                                 const std::string expiry = "*** Timed ban on " + cr->name + " expired.";
 214                                 // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above
 215                                 PrefixMode* mh = ServerInstance->Modes->FindPrefixMode('h');
 216                                 char pfxchar = (mh && mh->name == "halfop") ? mh->GetPrefix() : '@';
 217
 218                                 ClientProtocol::Messages::Privmsg notice(ClientProtocol::Messages::Privmsg::nocopy, ServerInstance->FakeClient, cr, expiry, MSG_NOTICE);
 219                                 cr->Write(ServerInstance->GetRFCEvents().privmsg, notice, pfxchar);
 220                                 ServerInstance->PI->SendChannelNotice(cr, pfxchar, expiry);
 221
 222                                 Modes::ChangeList setban;
 223                                 setban.push_remove(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), mask);
 224                                 ServerInstance->Modes->Process(ServerInstance->FakeClient, cr, NULL, setban);
 225                         }
 226                 }
 227         }
 228
 229         void OnChannelDelete(Channel* chan) CXX11_OVERRIDE
 230         {
 231                 // Remove all timed bans affecting the channel from internal bookkeeping
 232                 TimedBanList.erase(std::remove_if(TimedBanList.begin(), TimedBanList.end(), ChannelMatcher(chan)), TimedBanList.end());
 233         }
 234
 235         Version GetVersion() CXX11_OVERRIDE
 236         {
 237                 return Version("Provides the TBAN command, timed channel bans", VF_COMMON | VF_VENDOR);
 238         }
 239 };
 240
 241 MODULE_INIT(ModuleTimedBans)