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 std::string&, size_t>
  27 {
  28  public:
  29         NewIsChannelHandler() { }
  30         virtual ~NewIsChannelHandler() { }
  31         virtual bool Call(const std::string&, size_t);
  32 };
  33
  34 bool NewIsChannelHandler::Call(const std::string& channame, size_t max)
  35 {
  36         if (channame.empty() || channame.length() > max || 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  private:
  52         NewIsChannelHandler myhandler;
  53         caller2<bool, const std::string&, size_t> rememberer;
  54         bool badchan;
  55
  56  public:
  57         ModuleChannelNames() : rememberer(ServerInstance->IsChannel), badchan(false)
  58         {
  59         }
  60
  61         void init()
  62         {
  63                 ServerInstance->IsChannel = &myhandler;
  64                 Implementation eventlist[] = { I_OnRehash, I_OnUserKick };
  65                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
  66                 OnRehash(NULL);
  67         }
  68
  69         void ValidateChans()
  70         {
  71                 badchan = true;
  72                 std::vector<Channel*> chanvec;
  73                 for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); ++i)
  74                 {
  75                         if (!ServerInstance->IsChannel(i->second->name, MAXBUF))
  76                                 chanvec.push_back(i->second);
  77                 }
  78                 std::vector<Channel*>::reverse_iterator c2 = chanvec.rbegin();
  79                 while (c2 != chanvec.rend())
  80                 {
  81                         Channel* c = *c2++;
  82                         if (c->IsModeSet('P') && c->GetUserCounter())
  83                         {
  84                                 std::vector<std::string> modes;
  85                                 modes.push_back(c->name);
  86                                 modes.push_back("-P");
  87
  88                                 ServerInstance->SendGlobalMode(modes, ServerInstance->FakeClient);
  89                         }
  90                         const UserMembList* users = c->GetUsers();
  91                         for(UserMembCIter j = users->begin(); j != users->end(); ++j)
  92                                 if (IS_LOCAL(j->first))
  93                                         c->KickUser(ServerInstance->FakeClient, j->first, "Channel name no longer valid");
  94                 }
  95                 badchan = false;
  96         }
  97
  98         virtual void OnRehash(User* user)
  99         {
 100                 ConfigTag* tag = ServerInstance->Config->ConfValue("channames");
 101                 std::string denyToken = tag->getString("denyrange");
 102                 std::string allowToken = tag->getString("allowrange");
 103                 allowedmap.set();
 104
 105                 irc::portparser denyrange(denyToken, false);
 106                 int denyno = -1;
 107                 while (0 != (denyno = denyrange.GetToken()))
 108                         allowedmap[denyno & 0xFF] = false;
 109
 110                 irc::portparser allowrange(allowToken, false);
 111                 int allowno = -1;
 112                 while (0 != (allowno = allowrange.GetToken()))
 113                         allowedmap[allowno & 0xFF] = true;
 114
 115                 allowedmap[0x07] = false; // BEL
 116                 allowedmap[0x20] = false; // ' '
 117                 allowedmap[0x2C] = false; // ','
 118
 119                 ValidateChans();
 120         }
 121
 122         virtual void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list)
 123         {
 124                 if (badchan)
 125                 {
 126                         const UserMembList* users = memb->chan->GetUsers();
 127                         for(UserMembCIter i = users->begin(); i != users->end(); i++)
 128                                 if (i->first != memb->user)
 129                                         except_list.insert(i->first);
 130                 }
 131         }
 132
 133         virtual ~ModuleChannelNames()
 134         {
 135                 ServerInstance->IsChannel = rememberer;
 136                 ValidateChans();
 137         }
 138
 139         virtual Version GetVersion()
 140         {
 141                 return Version("Implements config tags which allow changing characters allowed in channel names", VF_VENDOR);
 142         }
 143 };
 144
 145 MODULE_INIT(ModuleChannelNames)