src/modules/m_redirect.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include "users.h"
  20 #include "channels.h"
  21 #include "modules.h"
  22 #include "inspircd.h"
  23
  24 /* $ModDesc: Provides channel mode +L (limit redirection) */
  25
  26 class Redirect : public ModeHandler
  27 {
  28  public:
  29         Redirect(InspIRCd* Instance) : ModeHandler(Instance, 'L', 1, 0, false, MODETYPE_CHANNEL, false) { }
  30
  31         ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
  32         {
  33                 if (channel->IsModeSet('L'))
  34                         return std::make_pair(true, channel->GetModeParameter('L'));
  35                 else
  36                         return std::make_pair(false, parameter);
  37         }
  38
  39         bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
  40         {
  41                 /* When TS is equal, the alphabetically later one wins */
  42                 return (their_param < our_param);
  43         }
  44
  45         ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
  46         {
  47                 if (adding)
  48                 {
  49                         chanrec* c = NULL;
  50
  51                         if (!ServerInstance->IsChannel(parameter.c_str()))
  52                         {
  53                                 source->WriteServ("403 %s %s :Invalid channel name",source->nick, parameter.c_str());
  54                                 parameter = "";
  55                                 return MODEACTION_DENY;
  56                         }
  57
  58                         c = ServerInstance->FindChan(parameter);
  59                         if (c)
  60                         {
  61                                 /* Fix by brain: Dont let a channel be linked to *itself* either */
  62                                 if (IS_LOCAL(source))
  63                                 {
  64                                         if ((c == channel) || (c->IsModeSet('L')))
  65                                         {
  66                                                 source->WriteServ("690 %s :Circular or chained +L to %s not allowed (Channel already has +L). Pack of wild dogs has been unleashed.",source->nick,parameter.c_str());
  67                                                 parameter = "";
  68                                                 return MODEACTION_DENY;
  69                                         }
  70                                         else
  71                                         {
  72                                                 for (chan_hash::const_iterator i = ServerInstance->chanlist.begin(); i != ServerInstance->chanlist.end(); i++)
  73                                                 {
  74                                                         if ((i->second != channel) && (i->second->IsModeSet('L')) && (irc::string(i->second->GetModeParameter('L').c_str()) == irc::string(channel->name)))
  75                                                         {
  76                                                                 source->WriteServ("690 %s :Circular or chained +L to %s not allowed (Already forwarded here from %s). Angry monkeys dispatched.",source->nick,parameter.c_str(),i->second->name);
  77                                                                 return MODEACTION_DENY;
  78                                                         }
  79                                                 }
  80                                         }
  81                                 }
  82                         }
  83
  84                         channel->SetMode('L', true);
  85                         channel->SetModeParam('L', parameter.c_str(), true);
  86                         return MODEACTION_ALLOW;
  87                 }
  88                 else
  89                 {
  90                         if (channel->IsModeSet('L'))
  91                         {
  92                                 channel->SetMode('L', false);
  93                                 return MODEACTION_ALLOW;
  94                         }
  95                 }
  96
  97                 return MODEACTION_DENY;
  98
  99         }
 100 };
 101
 102 class ModuleRedirect : public Module
 103 {
 104
 105         Redirect* re;
 106
 107  public:
 108
 109         ModuleRedirect(InspIRCd* Me)
 110                 : Module::Module(Me)
 111         {
 112
 113                 re = new Redirect(ServerInstance);
 114                 ServerInstance->AddMode(re, 'L');
 115         }
 116
 117         void Implements(char* List)
 118         {
 119                 List[I_OnUserPreJoin] = 1;
 120         }
 121
 122         virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname)
 123         {
 124                 if (chan)
 125                 {
 126                         if (chan->IsModeSet('L') && chan->limit)
 127                         {
 128                                 if (chan->GetUserCounter() >= chan->limit)
 129                                 {
 130                                         std::string channel = chan->GetModeParameter('L');
 131                                         user->WriteServ("470 %s :%s has become full, so you are automatically being transferred to the linked channel %s",user->nick,cname,channel.c_str());
 132                                         chanrec::JoinUser(ServerInstance, user, channel.c_str(), false);
 133                                         return 1;
 134                                 }
 135                         }
 136                 }
 137                 return 0;
 138         }
 139
 140         virtual ~ModuleRedirect()
 141         {
 142                 DELETE(re);
 143         }
 144
 145         virtual Version GetVersion()
 146         {
 147                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 148         }
 149 };
 150
 151
 152 class ModuleRedirectFactory : public ModuleFactory
 153 {
 154  public:
 155         ModuleRedirectFactory()
 156         {
 157         }
 158
 159         ~ModuleRedirectFactory()
 160         {
 161         }
 162
 163         virtual Module * CreateModule(InspIRCd* Me)
 164         {
 165                 return new ModuleRedirect(Me);
 166         }
 167
 168 };
 169
 170
 171 extern "C" void * init_module( void )
 172 {
 173         return new ModuleRedirectFactory;
 174 }
 175