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 /* $ModDesc: Adds timed bans */
  24
  25 #include "inspircd.h"
  26
  27 /** Holds a timed ban
  28  */
  29 class TimedBan
  30 {
  31  public:
  32         std::string channel;
  33         std::string mask;
  34         time_t expire;
  35         Channel* chan;
  36 };
  37
  38 typedef std::vector<TimedBan> timedbans;
  39 timedbans TimedBanList;
  40
  41 /** Handle /TBAN
  42  */
  43 class CommandTban : public Command
  44 {
  45  public:
  46         CommandTban(Module* Creator) : Command(Creator,"TBAN", 3)
  47         {
  48                 syntax = "<channel> <duration> <banmask>";
  49                 TRANSLATE4(TR_TEXT, TR_TEXT, TR_TEXT, TR_END);
  50         }
  51
  52         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  53         {
  54                 Channel* channel = ServerInstance->FindChan(parameters[0]);
  55                 if (!channel)
  56                 {
  57                         user->WriteNumeric(401, "%s %s :No such channel",user->nick.c_str(), parameters[0].c_str());
  58                         return CMD_FAILURE;
  59                 }
  60                 int cm = channel->GetPrefixValue(user);
  61                 if (cm < HALFOP_VALUE)
  62                 {
  63                         user->WriteNumeric(482, "%s %s :You do not have permission to set bans on this channel",
  64                                 user->nick.c_str(), channel->name.c_str());
  65                         return CMD_FAILURE;
  66                 }
  67
  68                 TimedBan T;
  69                 std::string channelname = parameters[0];
  70                 long duration = ServerInstance->Duration(parameters[1]);
  71                 unsigned long expire = duration + ServerInstance->Time();
  72                 if (duration < 1)
  73                 {
  74                         user->WriteServ("NOTICE "+user->nick+" :Invalid ban time");
  75                         return CMD_FAILURE;
  76                 }
  77                 std::string mask = parameters[2];
  78                 std::vector<std::string> setban;
  79                 setban.push_back(parameters[0]);
  80                 setban.push_back("+b");
  81                 bool isextban = ((mask.size() > 2) && (mask[1] == ':'));
  82                 if (!isextban && !ServerInstance->IsValidMask(mask))
  83                         mask.append("!*@*");
  84                 if ((mask.length() > 250) || (!ServerInstance->IsValidMask(mask) && !isextban))
  85                 {
  86                         user->WriteServ("NOTICE "+user->nick+" :Invalid ban mask");
  87                         return CMD_FAILURE;
  88                 }
  89                 setban.push_back(mask);
  90                 // use CallHandler to make it so that the user sets the mode
  91                 // themselves
  92                 ServerInstance->Parser->CallHandler("MODE",setban,user);
  93                 for (BanList::iterator i = channel->bans.begin(); i != channel->bans.end(); i++)
  94                         if (!strcasecmp(i->data.c_str(), mask.c_str()))
  95                                 goto found;
  96                 return CMD_FAILURE;
  97 found:
  98                 CUList tmp;
  99                 T.channel = channelname;
 100                 T.mask = mask;
 101                 T.expire = expire + (IS_REMOTE(user) ? 5 : 0);
 102                 T.chan = channel;
 103                 TimedBanList.push_back(T);
 104
 105                 // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above
 106                 ModeHandler* mh = ServerInstance->Modes->FindMode('h', MODETYPE_CHANNEL);
 107                 char pfxchar = (mh && mh->name == "halfop") ? '%' : '@';
 108
 109                 channel->WriteAllExcept(ServerInstance->FakeClient, true, pfxchar, tmp, "NOTICE %s :%s added a timed ban on %s lasting for %ld seconds.", channel->name.c_str(), user->nick.c_str(), mask.c_str(), duration);
 110                 return CMD_SUCCESS;
 111         }
 112
 113         RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
 114         {
 115                 return ROUTE_BROADCAST;
 116         }
 117 };
 118
 119 class ChannelMatcher
 120 {
 121         Channel* const chan;
 122
 123  public:
 124         ChannelMatcher(Channel* ch)
 125                 : chan(ch)
 126         {
 127         }
 128
 129         bool operator()(const TimedBan& tb) const
 130         {
 131                 return (tb.chan == chan);
 132         }
 133 };
 134
 135 class ModuleTimedBans : public Module
 136 {
 137         CommandTban cmd;
 138  public:
 139         ModuleTimedBans()
 140                 : cmd(this)
 141         {
 142         }
 143
 144         void init()
 145         {
 146                 ServerInstance->Modules->AddService(cmd);
 147                 Implementation eventlist[] = { I_OnDelBan, I_OnBackgroundTimer, I_OnChannelDelete };
 148                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 149         }
 150
 151         virtual ModResult OnDelBan(User* source, Channel* chan, const std::string &banmask)
 152         {
 153                 irc::string listitem = banmask.c_str();
 154                 irc::string thischan = chan->name.c_str();
 155                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end(); i++)
 156                 {
 157                         irc::string target = i->mask.c_str();
 158                         irc::string tchan = i->channel.c_str();
 159                         if ((listitem == target) && (tchan == thischan))
 160                         {
 161                                 TimedBanList.erase(i);
 162                                 break;
 163                         }
 164                 }
 165                 return MOD_RES_PASSTHRU;
 166         }
 167
 168         virtual void OnBackgroundTimer(time_t curtime)
 169         {
 170                 timedbans expired;
 171                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end();)
 172                 {
 173                         if (curtime > i->expire)
 174                         {
 175                                 expired.push_back(*i);
 176                                 i = TimedBanList.erase(i);
 177                         }
 178                         else
 179                                 ++i;
 180                 }
 181
 182                 for (timedbans::iterator i = expired.begin(); i != expired.end(); i++)
 183                 {
 184                         std::string chan = i->channel;
 185                         std::string mask = i->mask;
 186                         Channel* cr = ServerInstance->FindChan(chan);
 187                         if (cr)
 188                         {
 189                                 std::vector<std::string> setban;
 190                                 setban.push_back(chan);
 191                                 setban.push_back("-b");
 192                                 setban.push_back(mask);
 193
 194                                 CUList empty;
 195                                 std::string expiry = "*** Timed ban on " + chan + " expired.";
 196                                 cr->WriteAllExcept(ServerInstance->FakeClient, true, '@', empty, "NOTICE %s :%s", cr->name.c_str(), expiry.c_str());
 197                                 ServerInstance->PI->SendChannelNotice(cr, '@', expiry);
 198
 199                                 ServerInstance->SendGlobalMode(setban, ServerInstance->FakeClient);
 200                         }
 201                 }
 202         }
 203
 204         void OnChannelDelete(Channel* chan)
 205         {
 206                 // Remove all timed bans affecting the channel from internal bookkeeping
 207                 TimedBanList.erase(std::remove_if(TimedBanList.begin(), TimedBanList.end(), ChannelMatcher(chan)), TimedBanList.end());
 208         }
 209
 210         virtual Version GetVersion()
 211         {
 212                 return Version("Adds timed bans", VF_COMMON | VF_VENDOR);
 213         }
 214 };
 215
 216 MODULE_INIT(ModuleTimedBans)
 217