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 HandlerBase2<bool, const char*, size_t>
  27 {
  28  public:
  29         NewIsChannelHandler() { }
  30         virtual ~NewIsChannelHandler() { }
  31         virtual bool Call(const char*, size_t);
  32 };
  33
  34 bool NewIsChannelHandler::Call(const char* c, size_t max)
  35 {
  36                 /* check for no name - don't check for !*chname, as if it is empty, it won't be '#'! */
  37                 if (!c || *c++ != '#')
  38                         return false;
  39
  40                 while (*c && --max)
  41                 {
  42                         unsigned int i = *c++ & 0xFF;
  43                         if (!allowedmap[i])
  44                                 return false;
  45                 }
  46                 // a name of exactly max length will have max = 1 here; the null does not trigger --max
  47                 return max;
  48 }
  49
  50 class ModuleChannelNames : public Module
  51 {
  52  private:
  53         NewIsChannelHandler myhandler;
  54         caller2<bool, const char*, size_t> rememberer;
  55         bool badchan;
  56
  57  public:
  58         ModuleChannelNames() : rememberer(ServerInstance->IsChannel), badchan(false)
  59         {
  60         }
  61
  62         void init()
  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.c_str(), MAXBUF))
  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('P') && c->GetUserCounter())
  84                         {
  85                                 std::vector<std::string> modes;
  86                                 modes.push_back(c->name);
  87                                 modes.push_back("-P");
  88
  89                                 ServerInstance->SendGlobalMode(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         virtual void OnRehash(User* user)
 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         virtual void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list)
 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         virtual ~ModuleChannelNames()
 143         {
 144                 ServerInstance->IsChannel = rememberer;
 145                 ValidateChans();
 146         }
 147
 148         virtual Version GetVersion()
 149         {
 150                 return Version("Implements config tags which allow changing characters allowed in channel names", VF_VENDOR);
 151         }
 152 };
 153
 154 MODULE_INIT(ModuleChannelNames)