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 <stdio.h>
  20 #include "users.h"
  21 #include "channels.h"
  22 #include "modules.h"
  23 #include "helperfuncs.h"
  24
  25 /* $ModDesc: Provides channel mode +L (limit redirection) */
  26
  27 class Redirect : public ModeHandler
  28 {
  29         Server* Srv;
  30  public:
  31         Redirect(Server* s) : ModeHandler('L', 1, 0, false, MODETYPE_CHANNEL, false), Srv(s) { }
  32
  33         ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
  34         {
  35                 if (channel->IsModeSet('L'))
  36                         return std::make_pair(true, channel->GetModeParameter('L'));
  37                 else
  38                         return std::make_pair(false, parameter);
  39         }
  40
  41         bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
  42         {
  43                 /* When TS is equal, the alphabetically later one wins */
  44                 return (their_param < our_param);
  45         }
  46
  47         ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
  48         {
  49                 if (adding)
  50                 {
  51                         chanrec* c = NULL;
  52
  53                         if (!IsValidChannelName(parameter.c_str()))
  54                         {
  55                                 WriteServ(source->fd,"403 %s %s :Invalid channel name",source->nick, parameter.c_str());
  56                                 parameter = "";
  57                                 return MODEACTION_DENY;
  58                         }
  59
  60                         c = Srv->FindChannel(parameter);
  61                         if (c)
  62                         {
  63                                 /* Fix by brain: Dont let a channel be linked to *itself* either */
  64                                 if ((c == channel) || (c->IsModeSet('L')))
  65                                 {
  66                                         WriteServ(source->fd,"690 %s :Circular redirection, mode +L to %s not allowed.",source->nick,parameter.c_str());
  67                                         parameter = "";
  68                                         return MODEACTION_DENY;
  69                                 }
  70                         }
  71
  72                         channel->SetMode('L', true);
  73                         channel->SetModeParam('L', parameter.c_str(), true);
  74                         return MODEACTION_ALLOW;
  75                 }
  76                 else
  77                 {
  78                         if (channel->IsModeSet('L'))
  79                         {
  80                                 channel->SetMode('L', false);
  81                                 return MODEACTION_ALLOW;
  82                         }
  83                 }
  84
  85                 return MODEACTION_DENY;
  86
  87         }
  88 };
  89
  90 class ModuleRedirect : public Module
  91 {
  92         Server *Srv;
  93         Redirect* re;
  94
  95  public:
  96
  97         ModuleRedirect(Server* Me)
  98                 : Module::Module(Me)
  99         {
 100                 Srv = Me;
 101                 re = new Redirect(Me);
 102                 Srv->AddMode(re, 'L');
 103         }
 104
 105         void Implements(char* List)
 106         {
 107                 List[I_On005Numeric] = List[I_OnUserPreJoin] = 1;
 108         }
 109
 110         virtual void On005Numeric(std::string &output)
 111         {
 112                 InsertMode(output, "L", 3);
 113         }
 114
 115         virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname)
 116         {
 117                 if (chan)
 118                 {
 119                         if (chan->IsModeSet('L'))
 120                         {
 121                                 if (Srv->CountUsers(chan) >= chan->limit)
 122                                 {
 123                                         std::string channel = chan->GetModeParameter('L');
 124                                         WriteServ(user->fd,"470 %s :%s has become full, so you are automatically being transferred to the linked channel %s",user->nick,cname,channel.c_str());
 125                                         Srv->JoinUserToChannel(user,channel.c_str(),"");
 126                                         return 1;
 127                                 }
 128                         }
 129                 }
 130                 return 0;
 131         }
 132
 133         virtual ~ModuleRedirect()
 134         {
 135                 DELETE(re);
 136         }
 137
 138         virtual Version GetVersion()
 139         {
 140                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 141         }
 142 };
 143
 144
 145 class ModuleRedirectFactory : public ModuleFactory
 146 {
 147  public:
 148         ModuleRedirectFactory()
 149         {
 150         }
 151
 152         ~ModuleRedirectFactory()
 153         {
 154         }
 155
 156         virtual Module * CreateModule(Server* Me)
 157         {
 158                 return new ModuleRedirect(Me);
 159         }
 160
 161 };
 162
 163
 164 extern "C" void * init_module( void )
 165 {
 166         return new ModuleRedirectFactory;
 167 }
 168