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 /* $ModDesc: Implements config tags which allow changing characters allowed in channel names */
  23
  24 static std::bitset<256> allowedmap;
  25
  26 class NewIsChannelHandler : public HandlerBase1<bool, const std::string&>
  27 {
  28  public:
  29         NewIsChannelHandler() { }
  30         ~NewIsChannelHandler() { }
  31         bool Call(const std::string&);
  32 };
  33
  34 bool NewIsChannelHandler::Call(const std::string& channame)
  35 {
  36         if (channame.empty() || channame.length() > ServerInstance->Config->Limits.ChanMax || channame[0] != '#')
  37                 return false;
  38
  39         for (std::string::const_iterator c = channame.begin(); c != channame.end(); ++c)
  40         {
  41                 unsigned int i = *c & 0xFF;
  42                 if (!allowedmap[i])
  43                         return false;
  44         }
  45
  46         return true;
  47 }
  48
  49 class ModuleChannelNames : public Module
  50 {
  51         NewIsChannelHandler myhandler;
  52         caller1<bool, const std::string&> rememberer;
  53         bool badchan;
  54
  55  public:
  56         ModuleChannelNames() : rememberer(ServerInstance->IsChannel), badchan(false)
  57         {
  58         }
  59
  60         void init() CXX11_OVERRIDE
  61         {
  62                 ServerInstance->IsChannel = &myhandler;
  63                 Implementation eventlist[] = { I_OnRehash, I_OnUserKick };
  64                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
  65                 OnRehash(NULL);
  66         }
  67
  68         void ValidateChans()
  69         {
  70                 badchan = true;
  71                 std::vector<Channel*> chanvec;
  72                 for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); ++i)
  73                 {
  74                         if (!ServerInstance->IsChannel(i->second->name))
  75                                 chanvec.push_back(i->second);
  76                 }
  77                 std::vector<Channel*>::reverse_iterator c2 = chanvec.rbegin();
  78                 while (c2 != chanvec.rend())
  79                 {
  80                         Channel* c = *c2++;
  81                         if (c->IsModeSet('P') && c->GetUserCounter())
  82                         {
  83                                 std::vector<std::string> modes;
  84                                 modes.push_back(c->name);
  85                                 modes.push_back("-P");
  86
  87                                 ServerInstance->SendGlobalMode(modes, ServerInstance->FakeClient);
  88                         }
  89                         const UserMembList* users = c->GetUsers();
  90                         for(UserMembCIter j = users->begin(); j != users->end(); )
  91                         {
  92                                 if (IS_LOCAL(j->first))
  93                                 {
  94                                         // KickUser invalidates the iterator
  95                                         UserMembCIter it = j++;
  96                                         c->KickUser(ServerInstance->FakeClient, it->first, "Channel name no longer valid");
  97                                 }
  98                                 else
  99                                         ++j;
 100                         }
 101                 }
 102                 badchan = false;
 103         }
 104
 105         void OnRehash(User* user) CXX11_OVERRIDE
 106         {
 107                 ConfigTag* tag = ServerInstance->Config->ConfValue("channames");
 108                 std::string denyToken = tag->getString("denyrange");
 109                 std::string allowToken = tag->getString("allowrange");
 110                 allowedmap.set();
 111
 112                 irc::portparser denyrange(denyToken, false);
 113                 int denyno = -1;
 114                 while (0 != (denyno = denyrange.GetToken()))
 115                         allowedmap[denyno & 0xFF] = false;
 116
 117                 irc::portparser allowrange(allowToken, false);
 118                 int allowno = -1;
 119                 while (0 != (allowno = allowrange.GetToken()))
 120                         allowedmap[allowno & 0xFF] = true;
 121
 122                 allowedmap[0x07] = false; // BEL
 123                 allowedmap[0x20] = false; // ' '
 124                 allowedmap[0x2C] = false; // ','
 125
 126                 ValidateChans();
 127         }
 128
 129         void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list) CXX11_OVERRIDE
 130         {
 131                 if (badchan)
 132                 {
 133                         const UserMembList* users = memb->chan->GetUsers();
 134                         for(UserMembCIter i = users->begin(); i != users->end(); i++)
 135                                 if (i->first != memb->user)
 136                                         except_list.insert(i->first);
 137                 }
 138         }
 139
 140         ~ModuleChannelNames()
 141         {
 142                 ServerInstance->IsChannel = rememberer;
 143                 ValidateChans();
 144         }
 145
 146         Version GetVersion() CXX11_OVERRIDE
 147         {
 148                 return Version("Implements config tags which allow changing characters allowed in channel names", VF_VENDOR);
 149         }
 150 };
 151
 152 MODULE_INIT(ModuleChannelNames)