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 bool allowedmap[256];
  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* chname, size_t max)
  29 {
  30                 const char *c = chname + 1;
  31
  32                 /* check for no name - don't check for !*chname, as if it is empty, it won't be '#'! */
  33                 if (!chname || *chname != '#')
  34                         return false;
  35
  36                 while (*c)
  37                         if (!allowedmap[(unsigned int)(*c++)]) return false;
  38
  39                 size_t len = c - chname;
  40                 return len <= max;
  41 }
  42
  43 class ModuleChannelNames : public Module
  44 {
  45  private:
  46         NewIsChannelHandler myhandler;
  47         caller2<bool, const char*, size_t> rememberer;
  48         bool badchan;
  49
  50  public:
  51         ModuleChannelNames() : rememberer(ServerInstance->IsChannel)
  52         {
  53                 ServerInstance->IsChannel = &myhandler;
  54                 badchan = false;
  55                 Implementation eventlist[] = { I_OnRehash, I_OnUserKick };
  56                 ServerInstance->Modules->Attach(eventlist, this, 2);
  57                 OnRehash(NULL);
  58         }
  59
  60         void ValidateChans()
  61         {
  62                 badchan = true;
  63                 std::vector<Channel*> chanvec;
  64                 for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); ++i)
  65                 {
  66                         if (!ServerInstance->IsChannel(i->second->name.c_str(), MAXBUF))
  67                                 chanvec.push_back(i->second);
  68                 }
  69                 std::vector<Channel*>::reverse_iterator c2 = chanvec.rbegin();
  70                 while (c2 != chanvec.rend())
  71                 {
  72                         Channel* c = *c2++;
  73                         if (c->IsModeSet('P') && c->GetUserCounter())
  74                         {
  75                                 std::vector<std::string> modes;
  76                                 modes.push_back(c->name);
  77                                 modes.push_back("-P");
  78
  79                                 ServerInstance->SendGlobalMode(modes, ServerInstance->FakeClient);
  80                         }
  81                         const UserMembList* users = c->GetUsers();
  82                         for(UserMembCIter j = users->begin(); j != users->end(); ++j)
  83                                 if (IS_LOCAL(j->first))
  84                                         c->KickUser(ServerInstance->FakeClient, j->first, "Channel name no longer valid");
  85                 }
  86                 badchan = false;
  87         }
  88
  89         virtual void OnRehash(User* user)
  90         {
  91                 ConfigReader Conf;
  92                 std::string denyToken = Conf.ReadValue("channames", "denyrange", 0);
  93                 std::string allowToken = Conf.ReadValue("channames", "allowrange", 0);
  94                 memset(allowedmap, 1, sizeof(allowedmap));
  95
  96                 irc::portparser denyrange(denyToken, false);
  97                 int denyno = -1;
  98                 while (0 != (denyno = denyrange.GetToken()))
  99                         allowedmap[(unsigned char)(denyno)] = false;
 100
 101                 irc::portparser allowrange(allowToken, false);
 102                 int allowno = -1;
 103                 while (0 != (allowno = allowrange.GetToken()))
 104                         allowedmap[(unsigned char)(allowno)] = true;
 105
 106                 allowedmap[0x07] = false; // BEL
 107                 allowedmap[0x20] = false; // ' '
 108                 allowedmap[0x2C] = false; // ','
 109
 110                 ValidateChans();
 111         }
 112
 113         virtual void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list)
 114         {
 115                 if (badchan)
 116                 {
 117                         const UserMembList* users = memb->chan->GetUsers();
 118                         for(UserMembCIter i = users->begin(); i != users->end(); i++)
 119                                 if (i->first != memb->user)
 120                                         except_list.insert(i->first);
 121                 }
 122         }
 123
 124         virtual ~ModuleChannelNames()
 125         {
 126                 ServerInstance->IsChannel = rememberer;
 127                 ValidateChans();
 128         }
 129
 130         virtual Version GetVersion()
 131         {
 132                 return Version("Implements config tags which allow changing characters allowed in channel names", VF_VENDOR);
 133         }
 134 };
 135
 136 MODULE_INIT(ModuleChannelNames)