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 };
  36
  37 typedef std::vector<TimedBan> timedbans;
  38 timedbans TimedBanList;
  39
  40 /** Handle /TBAN
  41  */
  42 class CommandTban : public Command
  43 {
  44  public:
  45         CommandTban(Module* Creator) : Command(Creator,"TBAN", 3)
  46         {
  47                 syntax = "<channel> <duration> <banmask>";
  48         }
  49
  50         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  51         {
  52                 Channel* channel = ServerInstance->FindChan(parameters[0]);
  53                 if (!channel)
  54                 {
  55                         user->WriteNumeric(401, "%s %s :No such channel",user->nick.c_str(), parameters[0].c_str());
  56                         return CMD_FAILURE;
  57                 }
  58                 int cm = channel->GetPrefixValue(user);
  59                 if (cm < HALFOP_VALUE)
  60                 {
  61                         user->WriteNumeric(482, "%s %s :You do not have permission to set bans on this channel",
  62                                 user->nick.c_str(), channel->name.c_str());
  63                         return CMD_FAILURE;
  64                 }
  65
  66                 TimedBan T;
  67                 std::string channelname = parameters[0];
  68                 unsigned long duration = InspIRCd::Duration(parameters[1]);
  69                 unsigned long expire = duration + ServerInstance->Time();
  70                 if (duration < 1)
  71                 {
  72                         user->WriteNotice("Invalid ban time");
  73                         return CMD_FAILURE;
  74                 }
  75                 std::string mask = parameters[2];
  76                 std::vector<std::string> setban;
  77                 setban.push_back(parameters[0]);
  78                 setban.push_back("+b");
  79                 bool isextban = ((mask.size() > 2) && (mask[1] == ':'));
  80                 if (!isextban && !ServerInstance->IsValidMask(mask))
  81                         mask.append("!*@*");
  82
  83                 setban.push_back(mask);
  84                 // use CallHandler to make it so that the user sets the mode
  85                 // themselves
  86                 ServerInstance->Parser->CallHandler("MODE",setban,user);
  87                 if (ServerInstance->Modes->GetLastParse().empty())
  88                 {
  89                         user->WriteNotice("Invalid ban mask");
  90                         return CMD_FAILURE;
  91                 }
  92
  93                 CUList tmp;
  94                 T.channel = channelname;
  95                 T.mask = mask;
  96                 T.expire = expire + (IS_REMOTE(user) ? 5 : 0);
  97                 TimedBanList.push_back(T);
  98
  99                 // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above
 100                 ModeHandler* mh = ServerInstance->Modes->FindMode('h', MODETYPE_CHANNEL);
 101                 char pfxchar = (mh && mh->name == "halfop") ? '%' : '@';
 102
 103                 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);
 104                 return CMD_SUCCESS;
 105         }
 106
 107         RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
 108         {
 109                 return ROUTE_BROADCAST;
 110         }
 111 };
 112
 113 class BanWatcher : public ModeWatcher
 114 {
 115  public:
 116         BanWatcher(Module* parent)
 117                 : ModeWatcher(parent, "ban", MODETYPE_CHANNEL)
 118         {
 119         }
 120
 121         void AfterMode(User* source, User* dest, Channel* chan, const std::string& banmask, bool adding)
 122         {
 123                 if (adding)
 124                         return;
 125
 126                 irc::string listitem = banmask.c_str();
 127                 irc::string thischan = chan->name.c_str();
 128                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end(); ++i)
 129                 {
 130                         irc::string target = i->mask.c_str();
 131                         irc::string tchan = i->channel.c_str();
 132                         if ((listitem == target) && (tchan == thischan))
 133                         {
 134                                 TimedBanList.erase(i);
 135                                 break;
 136                         }
 137                 }
 138         }
 139 };
 140
 141 class ModuleTimedBans : public Module
 142 {
 143         CommandTban cmd;
 144         BanWatcher banwatcher;
 145
 146  public:
 147         ModuleTimedBans()
 148                 : cmd(this)
 149                 , banwatcher(this)
 150         {
 151         }
 152
 153         void init() CXX11_OVERRIDE
 154         {
 155                 ServerInstance->Modules->AddService(cmd);
 156                 Implementation eventlist[] = { I_OnBackgroundTimer };
 157                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 158                 ServerInstance->Modes->AddModeWatcher(&banwatcher);
 159         }
 160
 161         ~ModuleTimedBans()
 162         {
 163                 ServerInstance->Modes->DelModeWatcher(&banwatcher);
 164         }
 165
 166         void OnBackgroundTimer(time_t curtime) CXX11_OVERRIDE
 167         {
 168                 timedbans expired;
 169                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end();)
 170                 {
 171                         if (curtime > i->expire)
 172                         {
 173                                 expired.push_back(*i);
 174                                 i = TimedBanList.erase(i);
 175                         }
 176                         else
 177                                 ++i;
 178                 }
 179
 180                 for (timedbans::iterator i = expired.begin(); i != expired.end(); i++)
 181                 {
 182                         std::string chan = i->channel;
 183                         std::string mask = i->mask;
 184                         Channel* cr = ServerInstance->FindChan(chan);
 185                         if (cr)
 186                         {
 187                                 std::vector<std::string> setban;
 188                                 setban.push_back(chan);
 189                                 setban.push_back("-b");
 190                                 setban.push_back(mask);
 191
 192                                 CUList empty;
 193                                 std::string expiry = "*** Timed ban on " + chan + " expired.";
 194                                 cr->WriteAllExcept(ServerInstance->FakeClient, true, '@', empty, "NOTICE %s :%s", cr->name.c_str(), expiry.c_str());
 195                                 ServerInstance->PI->SendChannelNotice(cr, '@', expiry);
 196
 197                                 ServerInstance->Modes->Process(setban, ServerInstance->FakeClient);
 198                         }
 199                 }
 200         }
 201
 202         Version GetVersion() CXX11_OVERRIDE
 203         {
 204                 return Version("Adds timed bans", VF_COMMON | VF_VENDOR);
 205         }
 206 };
 207
 208 MODULE_INIT(ModuleTimedBans)