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         NewIsChannelHandler() { }
  28         ~NewIsChannelHandler() { }
  29         bool Call(const std::string&);
  30 };
  31
  32 bool NewIsChannelHandler::Call(const std::string& channame)
  33 {
  34         if (channame.empty() || channame.length() > ServerInstance->Config->Limits.ChanMax || channame[0] != '#')
  35                 return false;
  36
  37         for (std::string::const_iterator c = channame.begin(); c != channame.end(); ++c)
  38         {
  39                 unsigned int i = *c & 0xFF;
  40                 if (!allowedmap[i])
  41                         return false;
  42         }
  43
  44         return true;
  45 }
  46
  47 class ModuleChannelNames : public Module
  48 {
  49         NewIsChannelHandler myhandler;
  50         caller1<bool, const std::string&> rememberer;
  51         bool badchan;
  52         ChanModeReference permchannelmode;
  53
  54  public:
  55         ModuleChannelNames()
  56                 : rememberer(ServerInstance->IsChannel)
  57                 , badchan(false)
  58                 , permchannelmode(this, "permanent")
  59         {
  60         }
  61
  62         void init() CXX11_OVERRIDE
  63         {
  64                 ServerInstance->IsChannel = &myhandler;
  65                 Implementation eventlist[] = { I_OnRehash, I_OnUserKick };
  66                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
  67                 OnRehash(NULL);
  68         }
  69
  70         void ValidateChans()
  71         {
  72                 badchan = true;
  73                 std::vector<Channel*> chanvec;
  74                 for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); ++i)
  75                 {
  76                         if (!ServerInstance->IsChannel(i->second->name))
  77                                 chanvec.push_back(i->second);
  78                 }
  79                 std::vector<Channel*>::reverse_iterator c2 = chanvec.rbegin();
  80                 while (c2 != chanvec.rend())
  81                 {
  82                         Channel* c = *c2++;
  83                         if (c->IsModeSet(permchannelmode) && c->GetUserCounter())
  84                         {
  85                                 std::vector<std::string> modes;
  86                                 modes.push_back(c->name);
  87                                 modes.push_back("-" + permchannelmode->GetModeChar());
  88
  89                                 ServerInstance->Modes->Process(modes, ServerInstance->FakeClient);
  90                         }
  91                         const UserMembList* users = c->GetUsers();
  92                         for(UserMembCIter j = users->begin(); j != users->end(); )
  93                         {
  94                                 if (IS_LOCAL(j->first))
  95                                 {
  96                                         // KickUser invalidates the iterator
  97                                         UserMembCIter it = j++;
  98                                         c->KickUser(ServerInstance->FakeClient, it->first, "Channel name no longer valid");
  99                                 }
 100                                 else
 101                                         ++j;
 102                         }
 103                 }
 104                 badchan = false;
 105         }
 106
 107         void OnRehash(User* user) CXX11_OVERRIDE
 108         {
 109                 ConfigTag* tag = ServerInstance->Config->ConfValue("channames");
 110                 std::string denyToken = tag->getString("denyrange");
 111                 std::string allowToken = tag->getString("allowrange");
 112                 allowedmap.set();
 113
 114                 irc::portparser denyrange(denyToken, false);
 115                 int denyno = -1;
 116                 while (0 != (denyno = denyrange.GetToken()))
 117                         allowedmap[denyno & 0xFF] = false;
 118
 119                 irc::portparser allowrange(allowToken, false);
 120                 int allowno = -1;
 121                 while (0 != (allowno = allowrange.GetToken()))
 122                         allowedmap[allowno & 0xFF] = true;
 123
 124                 allowedmap[0x07] = false; // BEL
 125                 allowedmap[0x20] = false; // ' '
 126                 allowedmap[0x2C] = false; // ','
 127
 128                 ValidateChans();
 129         }
 130
 131         void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list) CXX11_OVERRIDE
 132         {
 133                 if (badchan)
 134                 {
 135                         const UserMembList* users = memb->chan->GetUsers();
 136                         for(UserMembCIter i = users->begin(); i != users->end(); i++)
 137                                 if (i->first != memb->user)
 138                                         except_list.insert(i->first);
 139                 }
 140         }
 141
 142         ~ModuleChannelNames()
 143         {
 144                 ServerInstance->IsChannel = rememberer;
 145                 ValidateChans();
 146         }
 147
 148         Version GetVersion() CXX11_OVERRIDE
 149         {
 150                 return Version("Implements config tags which allow changing characters allowed in channel names", VF_VENDOR);
 151         }
 152 };
 153
 154 MODULE_INIT(ModuleChannelNames)