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                 TRANSLATE4(TR_TEXT, TR_TEXT, TR_TEXT, TR_END);
  49         }
  50
  51         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  52         {
  53                 Channel* channel = ServerInstance->FindChan(parameters[0]);
  54                 if (!channel)
  55                 {
  56                         user->WriteNumeric(401, "%s %s :No such channel",user->nick.c_str(), parameters[0].c_str());
  57                         return CMD_FAILURE;
  58                 }
  59                 int cm = channel->GetPrefixValue(user);
  60                 if (cm < HALFOP_VALUE)
  61                 {
  62                         user->WriteNumeric(482, "%s %s :You do not have permission to set bans on this channel",
  63                                 user->nick.c_str(), channel->name.c_str());
  64                         return CMD_FAILURE;
  65                 }
  66
  67                 TimedBan T;
  68                 std::string channelname = parameters[0];
  69                 unsigned long duration = InspIRCd::Duration(parameters[1]);
  70                 unsigned long expire = duration + ServerInstance->Time();
  71                 if (duration < 1)
  72                 {
  73                         user->WriteNotice("Invalid ban time");
  74                         return CMD_FAILURE;
  75                 }
  76                 std::string mask = parameters[2];
  77                 std::vector<std::string> setban;
  78                 setban.push_back(parameters[0]);
  79                 setban.push_back("+b");
  80                 bool isextban = ((mask.size() > 2) && (mask[1] == ':'));
  81                 if (!isextban && !ServerInstance->IsValidMask(mask))
  82                         mask.append("!*@*");
  83
  84                 setban.push_back(mask);
  85                 // use CallHandler to make it so that the user sets the mode
  86                 // themselves
  87                 ServerInstance->Parser->CallHandler("MODE",setban,user);
  88                 if (ServerInstance->Modes->GetLastParse().empty())
  89                 {
  90                         user->WriteNotice("Invalid ban mask");
  91                         return CMD_FAILURE;
  92                 }
  93
  94                 CUList tmp;
  95                 T.channel = channelname;
  96                 T.mask = mask;
  97                 T.expire = expire + (IS_REMOTE(user) ? 5 : 0);
  98                 TimedBanList.push_back(T);
  99
 100                 // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above
 101                 ModeHandler* mh = ServerInstance->Modes->FindMode('h', MODETYPE_CHANNEL);
 102                 char pfxchar = (mh && mh->name == "halfop") ? '%' : '@';
 103
 104                 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);
 105                 return CMD_SUCCESS;
 106         }
 107
 108         RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
 109         {
 110                 return ROUTE_BROADCAST;
 111         }
 112 };
 113
 114 class BanWatcher : public ModeWatcher
 115 {
 116  public:
 117         BanWatcher(Module* parent)
 118                 : ModeWatcher(parent, "ban", MODETYPE_CHANNEL)
 119         {
 120         }
 121
 122         void AfterMode(User* source, User* dest, Channel* chan, const std::string& banmask, bool adding)
 123         {
 124                 if (adding)
 125                         return;
 126
 127                 irc::string listitem = banmask.c_str();
 128                 irc::string thischan = chan->name.c_str();
 129                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end(); ++i)
 130                 {
 131                         irc::string target = i->mask.c_str();
 132                         irc::string tchan = i->channel.c_str();
 133                         if ((listitem == target) && (tchan == thischan))
 134                         {
 135                                 TimedBanList.erase(i);
 136                                 break;
 137                         }
 138                 }
 139         }
 140 };
 141
 142 class ModuleTimedBans : public Module
 143 {
 144         CommandTban cmd;
 145         BanWatcher banwatcher;
 146
 147  public:
 148         ModuleTimedBans()
 149                 : cmd(this)
 150                 , banwatcher(this)
 151         {
 152         }
 153
 154         void init() CXX11_OVERRIDE
 155         {
 156                 ServerInstance->Modules->AddService(cmd);
 157                 Implementation eventlist[] = { I_OnBackgroundTimer };
 158                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 159                 ServerInstance->Modes->AddModeWatcher(&banwatcher);
 160         }
 161
 162         ~ModuleTimedBans()
 163         {
 164                 ServerInstance->Modes->DelModeWatcher(&banwatcher);
 165         }
 166
 167         void OnBackgroundTimer(time_t curtime) CXX11_OVERRIDE
 168         {
 169                 timedbans expired;
 170                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end();)
 171                 {
 172                         if (curtime > i->expire)
 173                         {
 174                                 expired.push_back(*i);
 175                                 i = TimedBanList.erase(i);
 176                         }
 177                         else
 178                                 ++i;
 179                 }
 180
 181                 for (timedbans::iterator i = expired.begin(); i != expired.end(); i++)
 182                 {
 183                         std::string chan = i->channel;
 184                         std::string mask = i->mask;
 185                         Channel* cr = ServerInstance->FindChan(chan);
 186                         if (cr)
 187                         {
 188                                 std::vector<std::string> setban;
 189                                 setban.push_back(chan);
 190                                 setban.push_back("-b");
 191                                 setban.push_back(mask);
 192
 193                                 CUList empty;
 194                                 std::string expiry = "*** Timed ban on " + chan + " expired.";
 195                                 cr->WriteAllExcept(ServerInstance->FakeClient, true, '@', empty, "NOTICE %s :%s", cr->name.c_str(), expiry.c_str());
 196                                 ServerInstance->PI->SendChannelNotice(cr, '@', expiry);
 197
 198                                 ServerInstance->SendGlobalMode(setban, ServerInstance->FakeClient);
 199                         }
 200                 }
 201         }
 202
 203         Version GetVersion() CXX11_OVERRIDE
 204         {
 205                 return Version("Adds timed bans", VF_COMMON | VF_VENDOR);
 206         }
 207 };
 208
 209 MODULE_INIT(ModuleTimedBans)