src/modules/m_channames.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *
   6  * This file is part of InspIRCd.  InspIRCd is free software: you can
   7  * redistribute it and/or modify it under the terms of the GNU General Public
   8  * License as published by the Free Software Foundation, version 2.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include "inspircd.h"
  21
  22 static std::bitset<256> allowedmap;
  23
  24 class NewIsChannelHandler : public HandlerBase1<bool, const std::string&>
  25 {
  26  public:
  27         bool Call(const std::string&) CXX11_OVERRIDE;
  28 };
  29
  30 bool NewIsChannelHandler::Call(const std::string& channame)
  31 {
  32         if (channame.empty() || channame.length() > ServerInstance->Config->Limits.ChanMax || channame[0] != '#')
  33                 return false;
  34
  35         for (std::string::const_iterator c = channame.begin(); c != channame.end(); ++c)
  36         {
  37                 unsigned int i = *c & 0xFF;
  38                 if (!allowedmap[i])
  39                         return false;
  40         }
  41
  42         return true;
  43 }
  44
  45 class ModuleChannelNames : public Module
  46 {
  47         NewIsChannelHandler myhandler;
  48         caller1<bool, const std::string&> rememberer;
  49         bool badchan;
  50         ChanModeReference permchannelmode;
  51
  52  public:
  53         ModuleChannelNames()
  54                 : rememberer(ServerInstance->IsChannel)
  55                 , badchan(false)
  56                 , permchannelmode(this, "permanent")
  57         {
  58         }
  59
  60         void init() CXX11_OVERRIDE
  61         {
  62                 ServerInstance->IsChannel = &myhandler;
  63         }
  64
  65         void ValidateChans()
  66         {
  67                 Modes::ChangeList removepermchan;
  68
  69                 badchan = true;
  70                 const chan_hash& chans = ServerInstance->GetChans();
  71                 for (chan_hash::const_iterator i = chans.begin(); i != chans.end(); )
  72                 {
  73                         Channel* c = i->second;
  74                         // Move iterator before we begin kicking
  75                         ++i;
  76                         if (ServerInstance->IsChannel(c->name))
  77                                 continue; // The name of this channel is still valid
  78
  79                         if (c->IsModeSet(permchannelmode) && c->GetUserCounter())
  80                         {
  81                                 removepermchan.clear();
  82                                 removepermchan.push_remove(*permchannelmode);
  83                                 ServerInstance->Modes->Process(ServerInstance->FakeClient, c, NULL, removepermchan);
  84                         }
  85
  86                         Channel::MemberMap& users = c->userlist;
  87                         for (Channel::MemberMap::iterator j = users.begin(); j != users.end(); )
  88                         {
  89                                 if (IS_LOCAL(j->first))
  90                                 {
  91                                         // KickUser invalidates the iterator
  92                                         Channel::MemberMap::iterator it = j++;
  93                                         c->KickUser(ServerInstance->FakeClient, it, "Channel name no longer valid");
  94                                 }
  95                                 else
  96                                         ++j;
  97                         }
  98                 }
  99                 badchan = false;
 100         }
 101
 102         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 103         {
 104                 ConfigTag* tag = ServerInstance->Config->ConfValue("channames");
 105                 std::string denyToken = tag->getString("denyrange");
 106                 std::string allowToken = tag->getString("allowrange");
 107
 108                 if (!denyToken.compare(0, 2, "0-"))
 109                         denyToken[0] = '1';
 110                 if (!allowToken.compare(0, 2, "0-"))
 111                         allowToken[0] = '1';
 112
 113                 allowedmap.set();
 114
 115                 irc::portparser denyrange(denyToken, false);
 116                 int denyno = -1;
 117                 while (0 != (denyno = denyrange.GetToken()))
 118                         allowedmap[denyno & 0xFF] = false;
 119
 120                 irc::portparser allowrange(allowToken, false);
 121                 int allowno = -1;
 122                 while (0 != (allowno = allowrange.GetToken()))
 123                         allowedmap[allowno & 0xFF] = true;
 124
 125                 allowedmap[0x07] = false; // BEL
 126                 allowedmap[0x20] = false; // ' '
 127                 allowedmap[0x2C] = false; // ','
 128
 129                 ValidateChans();
 130         }
 131
 132         void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list) CXX11_OVERRIDE
 133         {
 134                 if (badchan)
 135                 {
 136                         const Channel::MemberMap& users = memb->chan->GetUsers();
 137                         for (Channel::MemberMap::const_iterator i = users.begin(); i != users.end(); ++i)
 138                                 if (i->first != memb->user)
 139                                         except_list.insert(i->first);
 140                 }
 141         }
 142
 143         CullResult cull() CXX11_OVERRIDE
 144         {
 145                 ServerInstance->IsChannel = rememberer;
 146                 ValidateChans();
 147                 return Module::cull();
 148         }
 149
 150         Version GetVersion() CXX11_OVERRIDE
 151         {
 152                 return Version("Implements config tags which allow changing characters allowed in channel names", VF_VENDOR);
 153         }
 154 };
 155
 156 MODULE_INIT(ModuleChannelNames)