src/modules/m_channames.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15
  16 /* $ModDesc: Implements config tags which allow changing characters allowed in channel names */
  17
  18 static std::bitset<256> allowedmap;
  19
  20 class NewIsChannelHandler : public HandlerBase2<bool, const char*, size_t>
  21 {
  22  public:
  23         NewIsChannelHandler() { }
  24         virtual ~NewIsChannelHandler() { }
  25         virtual bool Call(const char*, size_t);
  26 };
  27
  28 bool NewIsChannelHandler::Call(const char* c, size_t max)
  29 {
  30                 /* check for no name - don't check for !*chname, as if it is empty, it won't be '#'! */
  31                 if (!c || *c++ != '#')
  32                         return false;
  33
  34                 while (*c && --max)
  35                 {
  36                         unsigned int i = *c++ & 0xFF;
  37                         if (!allowedmap[i])
  38                                 return false;
  39                 }
  40                 // a name of exactly max length will have max = 1 here; the null does not trigger --max
  41                 return max;
  42 }
  43
  44 class ModuleChannelNames : public Module
  45 {
  46  private:
  47         NewIsChannelHandler myhandler;
  48         caller2<bool, const char*, size_t> rememberer;
  49         bool badchan;
  50
  51  public:
  52         ModuleChannelNames() : rememberer(ServerInstance->IsChannel)
  53         {
  54                 ServerInstance->IsChannel = &myhandler;
  55                 badchan = false;
  56                 Implementation eventlist[] = { I_OnRehash, I_OnUserKick };
  57                 ServerInstance->Modules->Attach(eventlist, this, 2);
  58                 OnRehash(NULL);
  59         }
  60
  61         void ValidateChans()
  62         {
  63                 badchan = true;
  64                 std::vector<Channel*> chanvec;
  65                 for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); ++i)
  66                 {
  67                         if (!ServerInstance->IsChannel(i->second->name.c_str(), MAXBUF))
  68                                 chanvec.push_back(i->second);
  69                 }
  70                 std::vector<Channel*>::reverse_iterator c2 = chanvec.rbegin();
  71                 while (c2 != chanvec.rend())
  72                 {
  73                         Channel* c = *c2++;
  74                         if (c->IsModeSet('P') && c->GetUserCounter())
  75                         {
  76                                 std::vector<std::string> modes;
  77                                 modes.push_back(c->name);
  78                                 modes.push_back("-P");
  79
  80                                 ServerInstance->SendGlobalMode(modes, ServerInstance->FakeClient);
  81                         }
  82                         const UserMembList* users = c->GetUsers();
  83                         for(UserMembCIter j = users->begin(); j != users->end(); ++j)
  84                                 if (IS_LOCAL(j->first))
  85                                         c->KickUser(ServerInstance->FakeClient, j->first, "Channel name no longer valid");
  86                 }
  87                 badchan = false;
  88         }
  89
  90         virtual void OnRehash(User* user)
  91         {
  92                 ConfigReader Conf;
  93                 std::string denyToken = Conf.ReadValue("channames", "denyrange", 0);
  94                 std::string allowToken = Conf.ReadValue("channames", "allowrange", 0);
  95                 allowedmap.set();
  96
  97                 irc::portparser denyrange(denyToken, false);
  98                 int denyno = -1;
  99                 while (0 != (denyno = denyrange.GetToken()))
 100                         allowedmap[denyno & 0xFF] = false;
 101
 102                 irc::portparser allowrange(allowToken, false);
 103                 int allowno = -1;
 104                 while (0 != (allowno = allowrange.GetToken()))
 105                         allowedmap[allowno & 0xFF] = true;
 106
 107                 allowedmap[0x07] = false; // BEL
 108                 allowedmap[0x20] = false; // ' '
 109                 allowedmap[0x2C] = false; // ','
 110
 111                 ValidateChans();
 112         }
 113
 114         virtual void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list)
 115         {
 116                 if (badchan)
 117                 {
 118                         const UserMembList* users = memb->chan->GetUsers();
 119                         for(UserMembCIter i = users->begin(); i != users->end(); i++)
 120                                 if (i->first != memb->user)
 121                                         except_list.insert(i->first);
 122                 }
 123         }
 124
 125         virtual ~ModuleChannelNames()
 126         {
 127                 ServerInstance->IsChannel = rememberer;
 128                 ValidateChans();
 129         }
 130
 131         virtual Version GetVersion()
 132         {
 133                 return Version("Implements config tags which allow changing characters allowed in channel names", VF_VENDOR);
 134         }
 135 };
 136
 137 MODULE_INIT(ModuleChannelNames)