Added joinflood +j

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@2878 e03df62e-2008-0410-955e-edbf42e46eb7

diff --git a/src/modules/m_joinflood.cpp b/src/modules/m_joinflood.cpp
new file mode 100644 (file)
index 0000000..8d0716d
--- /dev/null
+++ b/src/modules/m_joinflood.cpp
@@ -0,0 +1,274 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
+ *                       E-mail:
+ *                <brain@chatspike.net>
+ *               <Craig@chatspike.net>
+ *     
+ * Written by Craig Edwards, Craig McLure, and others.
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+using namespace std;
+
+#include <stdio.h>
+#include <map>
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+#include "helperfuncs.h"
+
+/* $ModDesc: Provides channel mode +f (message flood protection) */
+
+class joinfloodsettings
+{
+ public:
+
+       int secs;
+       int joins;
+       time_t reset;
+       time_t unlocktime;
+       int counter;
+       bool locked;
+
+       joinfloodsettings() : secs(0), joins(0) {};
+       joinfloodsettings(int b, int c) : secs(b), joins(c)
+       {
+               reset = time(NULL) + secs;
+               counter = 0;
+               locked = false;
+               log(DEBUG,"Create new joinfloodsettings: %lu %lu",time(NULL),reset);
+       };
+
+       void addjoin()
+       {
+               counter++;
+               if (time(NULL) > reset)
+               {
+                       counter = 0;
+                       reset = time(NULL) + secs;
+               }
+       }
+
+       bool shouldlock()
+       {
+               return (counter >= this->joins);
+       }
+
+       void clear()
+       {
+               counter = 0;
+       }
+
+       bool islocked()
+       {
+               if (locked)
+               {
+                       if (time(NULL) > unlocktime)
+                       {
+                               locked = false;
+                               return false;
+                       }
+                       else
+                       {
+                               return true;
+                       }
+               }
+               return false;
+       }
+
+       void lock()
+       {
+               locked = true;
+               unlocktime = time(NULL) + 60;
+       }
+
+       
+};
+
+class ModuleJoinFlood : public Module
+{
+       Server *Srv;
+       
+ public:
+ 
+       ModuleJoinFlood(Server* Me)
+               : Module::Module(Me)
+       {
+               Srv = Me;
+               Srv->AddExtendedMode('j',MT_CHANNEL,false,1,0);
+       }
+       
+       virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list &params)
+       {
+               if ((modechar == 'j') && (type == MT_CHANNEL))
+               {
+                       if (mode_on)
+                       {
+                               std::string FloodParams = params[0];
+                               chanrec* c = (chanrec*)target;
+                               char ndata[MAXBUF];
+                               char* data = ndata;
+                               strlcpy(ndata,FloodParams.c_str(),MAXBUF);
+                               char* joins = data;
+                               char* secs = NULL;
+                               while (*data)
+                               {
+                                       if (*data == ':')
+                                       {
+                                               *data = 0;
+                                               data++;
+                                               secs = data;
+                                               break;
+                                       }
+                                       else data++;
+                               }
+                               if (secs)
+                               {
+                                       /* Set up the flood parameters for this channel */
+                                       int njoins = atoi(joins);
+                                       int nsecs = atoi(secs);
+                                       if ((njoins<1) || (nsecs<1))
+                                       {
+                                               WriteServ(user->fd,"608 %s %s :Invalid flood parameter",user->nick,c->name);
+                                               return 0;
+                                       }
+                                       else
+                                       {
+                                               if (!c->GetExt("joinflood"))
+                                               {
+                                                       joinfloodsettings *f = new joinfloodsettings(njoins,nsecs);
+                                                       c->Extend("joinflood",(char*)f);
+                                               }
+                                       }
+                                       return 1;
+                               }
+                               else
+                               {
+                                       WriteServ(user->fd,"608 %s %s :Invalid flood parameter",user->nick,c->name);
+                                       return 0;
+                               }
+                               
+                       }
+                       else
+                       {
+                               chanrec* c = (chanrec*)target;
+                               if (c->GetExt("joinflood"))
+                               {
+                                       joinfloodsettings *f = (joinfloodsettings*)c->GetExt("joinflood");
+                                       delete f;
+                                       c->Shrink("joinflood");
+                               }
+                       }
+                       return 1;
+               }
+               return 0;
+       }
+
+       virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname)
+       {
+               if (chan)
+               {
+                       joinfloodsettings *f = (joinfloodsettings*)chan->GetExt("joinflood");
+                       if (f)
+                       {
+                               if (f->islocked())
+                               {
+                                       WriteServ(user->fd,"609 %s %s :This channel is temporarily unavailable (+j). Please try again later.",user->nick,chan->name);
+                                       return 1;
+                               }
+                       }
+               }
+               return 0;
+       }
+
+       virtual void OnUserJoin(userrec* user, chanrec* channel)
+       {
+               joinfloodsettings *f = (joinfloodsettings*)channel->GetExt("joinflood");
+               if (f)
+               {
+                       f->addjoin();
+                       if (f->shouldlock())
+                       {
+                               f->clear();
+                               f->lock();
+                               WriteChannelWithServ((char*)Srv->GetServerName().c_str(), channel, "NOTICE %s :This channel has been closed to new users for 60 seconds because there have been more than %d joins in %d seconds.",channel->name,f->joins,f->secs);
+                       }
+               }
+       }
+
+       void OnChannelDelete(chanrec* chan)
+       {
+               if (chan->GetExt("joinflood"))
+               {
+                       joinfloodsettings *f = (joinfloodsettings*)chan->GetExt("joinflood");
+                       delete f;
+                       chan->Shrink("joinflood");
+               }
+       }
+
+       void Implements(char* List)
+       {
+               List[I_On005Numeric] = List[I_OnExtendedMode] = List[I_OnChannelDelete] = List[I_OnUserPreJoin] = List[I_OnUserJoin] = 1;
+       }
+
+        virtual void On005Numeric(std::string &output)
+        {
+                std::stringstream line(output);
+                std::string temp1, temp2;
+                while (!line.eof())
+                {
+                        line >> temp1;
+                        if (temp1.substr(0,10) == "CHANMODES=")
+                        {
+                               // By doing this we're *assuming* no other module has fucked up the CHANMODES=
+                               // section of the 005 numeric. If they have, we're going DOWN in a blaze of glory,
+                               // with a honking great EXCEPTION :)
+                               temp1.insert(temp1.find(",")+1,"j");
+                        }
+                        temp2 = temp2 + temp1 + " ";
+                }
+               if (temp2.length())
+                       output = temp2.substr(0,temp2.length()-1);
+        }
+
+       virtual ~ModuleJoinFlood()
+       {
+       }
+       
+       virtual Version GetVersion()
+       {
+               return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
+       }
+};
+
+
+class ModuleJoinFloodFactory : public ModuleFactory
+{
+ public:
+       ModuleJoinFloodFactory()
+       {
+       }
+       
+       ~ModuleJoinFloodFactory()
+       {
+       }
+       
+       virtual Module * CreateModule(Server* Me)
+       {
+               return new ModuleJoinFlood(Me);
+       }
+       
+};
+
+
+extern "C" void * init_module( void )
+{
+       return new ModuleJoinFloodFactory;
+}
+