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/* +------------------------------------+
* | 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 "users.h"
#include "channels.h"
#include "modules.h"
#include "helperfuncs.h"
#include "message.h"
#include <vector>
extern time_t TIME;
class ListData
{
public:
long list_start;
long list_position;
bool list_ended;
ListData() : list_start(0), list_position(0), list_ended(false) {};
ListData(long pos, time_t t) : list_start(t), list_position(pos), list_ended(false) {};
};
/* $ModDesc: A module overriding /list, and making it safe - stop those sendq problems. */
typedef std::vector<userrec *> UserList;
UserList listusers; /* vector of people doing a /list */
/*
* To create a timer which recurs every second, we inherit from InspTimer.
* InspTimer is only one-shot however, so at the end of each Tick() we simply
* insert another of ourselves into the pending queue :)
*/
class ListTimer : public InspTimer
{
private:
Server* Srv;
char buffer[MAXBUF];
chanrec *chan;
public:
ListTimer(long interval, Server* Me) : InspTimer(interval,TIME), Srv(Me)
{
}
virtual void Tick(time_t TIME)
{
bool go_again = true;
while (go_again)
{
go_again = false;
for (UserList::iterator iter = listusers.begin(); iter != listusers.end(); iter++)
{
/*
* What we do here:
* - Get where they are up to
* - If it's > GetChannelCount, erase them from the iterator, set go_again to true
* - If not, spool the next 20 channels
*/
userrec* u = (userrec*)(*iter);
ListData* ld = (ListData*)u->GetExt("safelist_cache");
if (ld->list_position > Srv->GetChannelCount())
{
u->Shrink("safelist_cache");
delete ld;
listusers.erase(iter);
go_again = true;
break;
}
log(DEBUG, "m_safelist.so: resuming spool of list to client %s at channel %ld", u->nick, ld->list_position);
chan = NULL;
/* Attempt to fill up to half the user's sendq with /LIST output */
long amount_sent = 0;
do
{
log(DEBUG,"Channel %ld",ld->list_position);
if (!ld->list_position)
WriteServ(u->fd,"321 %s Channel :Users Name",u->nick);
chan = Srv->GetChannelIndex(ld->list_position);
/* spool details */
bool has_user = (chan && chan->HasUser(u));
if ((chan) && (((!(chan->binarymodes & CM_PRIVATE)) && (!(chan->binarymodes & CM_SECRET))) || (has_user)))
{
/* Increment total plus linefeed */
int counter = snprintf(buffer,MAXBUF,"322 %s %s %d :[+%s] %s",u->nick,chan->name,usercount_i(chan),chanmodes(chan,has_user),chan->topic);
amount_sent += counter + 4 + Srv->GetServerName().length();
log(DEBUG,"m_safelist.so: Sent %ld of safe %ld / 4",amount_sent,u->sendqmax);
WriteServ_NoFormat(u->fd,buffer);
}
else
{
if (!chan)
{
if (!ld->list_ended)
{
ld->list_ended = true;
WriteServ(u->fd,"323 %s :End of channel list.",u->nick);
}
}
}
ld->list_position++;
}
while ((chan != NULL) && (amount_sent < (u->sendqmax / 4)));
}
}
ListTimer* MyTimer = new ListTimer(1,Srv);
Srv->AddTimer(MyTimer);
}
};
class ModuleSafeList : public Module
{
private:
Server *Srv;
ListTimer* MyTimer;
public:
ModuleSafeList(Server* Me) : Module::Module(Me)
{
Srv = Me;
MyTimer = new ListTimer(1,Srv);
Srv->AddTimer(MyTimer);
}
virtual ~ModuleSafeList()
{
}
virtual Version GetVersion()
{
return Version(1,0,0,0,VF_VENDOR);
}
void Implements(char* List)
{
List[I_OnPreCommand] = List[I_OnCleanup] = List[I_OnUserQuit] = List[I_On005Numeric] = 1;
}
/*
* OnPreCommand()
* Intercept the LIST command.
*/
virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user, bool validated)
{
/* 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(char** parameters, int pcnt, userrec* user)
{
/* First, let's check if the user is currently /list'ing */
ListData *ld = (ListData*)user->GetExt("safelist_cache");
if (ld)
{
/* user is already /list'ing, we don't want to do shit. */
return 1;
}
time_t* last_list_time = (time_t*)user->GetExt("safelist_last");
if (last_list_time)
{
if (TIME < (*last_list_time)+60)
{
WriteServ(user->fd,"NOTICE %s :*** Woah there, slow down a little, you can't /LIST so often!",user->nick);
return 1;
}
delete last_list_time;
user->Shrink("safelist_last");
}
/*
* start at channel 0! ;)
*/
ld = new ListData(0,TIME);
user->Extend("safelist_cache", (char*)ld);
listusers.push_back(user);
time_t* llt = new time_t;
*llt = TIME;
user->Extend("safelist_last",(char*)llt);
return 1;
}
virtual void OnCleanup(int target_type, void* item)
{
if(target_type == TYPE_USER)
{
userrec* u = (userrec*)item;
ListData* ld = (ListData*)u->GetExt("safelist_cache");
if (ld)
{
u->Shrink("safelist_cache");
delete ld;
}
for (UserList::iterator iter = listusers.begin(); iter != listusers.end(); iter++)
{
userrec* u2 = (userrec*)(*iter);
if (u2 == u)
{
listusers.erase(iter);
break;
}
}
time_t* last_list_time = (time_t*)u->GetExt("safelist_last");
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, std::string message)
{
this->OnCleanup(TYPE_USER,user);
}
};
/******************************************************************************************************/
class ModuleSafeListFactory : public ModuleFactory
{
public:
ModuleSafeListFactory()
{
}
~ModuleSafeListFactory()
{
}
virtual Module * CreateModule(Server* Me)
{
return new ModuleSafeList(Me);
}
};
extern "C" void * init_module( void )
{
return new ModuleSafeListFactory;
}
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