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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "configreader.h"
#include "inspircd.h"
#include "wildcard.h"
/** Holds a users m_safelist state
*/
class ListData : public classbase
{
public:
long list_start;
long list_position;
bool list_ended;
const std::string glob;
ListData() : list_start(0), list_position(0), list_ended(false) {};
ListData(long pos, time_t t, const std::string &pattern) : list_start(t), list_position(pos), list_ended(false), glob(pattern) {};
};
/* $ModDesc: A module overriding /list, and making it safe - stop those sendq problems. */
class ModuleSafeList : public Module
{
time_t ThrottleSecs;
size_t ServerNameSize;
int global_listing;
int LimitList;
public:
ModuleSafeList(InspIRCd* Me) : Module::Module(Me)
{
OnRehash(NULL, "");
}
virtual ~ModuleSafeList()
{
}
virtual void OnRehash(userrec* user, const std::string ¶meter)
{
ConfigReader MyConf(ServerInstance);
ThrottleSecs = MyConf.ReadInteger("safelist", "throttle", "60", 0, true);
LimitList = MyConf.ReadInteger("safelist", "maxlisters", "50", 0, true);
ServerNameSize = strlen(ServerInstance->Config->ServerName) + 4;
global_listing = 0;
}
virtual Version GetVersion()
{
return Version(1,1,0,0,VF_VENDOR,API_VERSION);
}
void Implements(char* List)
{
List[I_OnBufferFlushed] = List[I_OnPreCommand] = List[I_OnCleanup] = List[I_OnUserQuit] = List[I_On005Numeric] = List[I_OnRehash] = 1;
}
/*
* OnPreCommand()
* Intercept the LIST command.
*/
virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
{
/* If the command doesnt appear to be valid, we dont want to mess with it. */
if (!validated)
return 0;
if (command == "LIST")
{
return this->HandleList(parameters, pcnt, user);
}
return 0;
}
/*
* HandleList()
* Handle (override) the LIST command.
*/
int HandleList(const char** parameters, int pcnt, userrec* user)
{
if (global_listing >= LimitList)
{
user->WriteServ("NOTICE %s :*** Server load is currently too heavy. Please try again later.", user->nick);
user->WriteServ("321 %s Channel :Users Name",user->nick);
user->WriteServ("323 %s :End of channel list.",user->nick);
return 1;
}
/* First, let's check if the user is currently /list'ing */
ListData *ld;
user->GetExt("safelist_cache", ld);
if (ld)
{
/* user is already /list'ing, we don't want to do shit. */
return 1;
}
/* Work around mIRC suckyness. YOU SUCK, KHALED! */
if ((pcnt == 1) && (*parameters[0] == '<'))
pcnt = 0;
time_t* last_list_time;
user->GetExt("safelist_last", last_list_time);
if (last_list_time)
{
if (ServerInstance->Time() < (*last_list_time)+ThrottleSecs)
{
user->WriteServ("NOTICE %s :*** Woah there, slow down a little, you can't /LIST so often!",user->nick);
user->WriteServ("321 %s Channel :Users Name",user->nick);
user->WriteServ("323 %s :End of channel list.",user->nick);
return 1;
}
DELETE(last_list_time);
user->Shrink("safelist_last");
}
/*
* start at channel 0! ;)
*/
ld = new ListData(0,ServerInstance->Time(), pcnt ? parameters[0] : "*");
user->Extend("safelist_cache", ld);
time_t* llt = new time_t;
*llt = ServerInstance->Time();
user->Extend("safelist_last", llt);
user->WriteServ("321 %s Channel :Users Name",user->nick);
global_listing++;
return 1;
}
virtual void OnBufferFlushed(userrec* user)
{
char buffer[MAXBUF];
ListData* ld;
if (user->GetExt("safelist_cache", ld))
{
chanrec* chan = NULL;
long amount_sent = 0;
do
{
chan = ServerInstance->GetChannelIndex(ld->list_position);
bool has_user = (chan && chan->HasUser(user));
if ((chan) && (chan->modes[CM_PRIVATE]))
{
bool display = match(chan->name, ld->glob.c_str());
long users = chan->GetUserCounter();
if ((users) && (display))
{
int counter = snprintf(buffer, MAXBUF, "322 %s *", user->nick);
amount_sent += counter + ServerNameSize;
user->WriteServ(std::string(buffer));
}
}
else if ((chan) && (((!(chan->modes[CM_PRIVATE])) && (!(chan->modes[CM_SECRET]))) || (has_user)))
{
bool display = match(chan->name, ld->glob.c_str());
long users = chan->GetUserCounter();
if ((users) && (display))
{
int counter = snprintf(buffer, MAXBUF, "322 %s %s %ld :[+%s] %s",user->nick, chan->name, users, chan->ChanModes(has_user), chan->topic);
amount_sent += counter + ServerNameSize;
user->WriteServ(std::string(buffer));
}
}
else
{
if (!chan)
{
if (!ld->list_ended)
{
ld->list_ended = true;
user->WriteServ("323 %s :End of channel list.",user->nick);
}
}
}
ld->list_position++;
}
while ((chan != NULL) && (amount_sent < (user->sendqmax / 4)));
if (ld->list_ended)
{
user->Shrink("safelist_cache");
DELETE(ld);
global_listing--;
}
}
}
virtual void OnCleanup(int target_type, void* item)
{
if(target_type == TYPE_USER)
{
userrec* u = (userrec*)item;
ListData* ld;
u->GetExt("safelist_cache", ld);
if (ld)
{
u->Shrink("safelist_cache");
DELETE(ld);
global_listing--;
}
time_t* last_list_time;
u->GetExt("safelist_last", last_list_time);
if (last_list_time)
{
DELETE(last_list_time);
u->Shrink("safelist_last");
}
}
}
virtual void On005Numeric(std::string &output)
{
output.append(" SAFELIST");
}
virtual void OnUserQuit(userrec* user, const std::string &message)
{
this->OnCleanup(TYPE_USER,user);
}
};
class ModuleSafeListFactory : public ModuleFactory
{
public:
ModuleSafeListFactory()
{
}
~ModuleSafeListFactory()
{
}
virtual Module * CreateModule(InspIRCd* Me)
{
return new ModuleSafeList(Me);
}
};
extern "C" void * init_module( void )
{
return new ModuleSafeListFactory;
}
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