/*
 *  NeoIRCd: NeoStats Group. Based on Hybird7
 *  m_pong.c: The reply to a ping message.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id: m_pong.c,v 1.4 2002/09/13 06:50:07 fishwaldo Exp $
 */

#include "stdinc.h"
#include "ircd.h"
#include "handlers.h"
#include "s_user.h"
#include "client.h"
#include "hash.h"       /* for find_client() */
#include "numeric.h"
#include "s_conf.h"
#include "send.h"
#include "channel.h"
#include "irc_string.h"
#include "s_debug.h"
#include "msg.h"
#include "parse.h"
#include "hash.h"
#include "modules.h"

static void mr_pong(struct Client*, struct Client*, int, char**);
static void ms_pong(struct Client*, struct Client*, int, char**);

struct Message pong_msgtab = {
  "PONG", 0, 0, 1, 0, MFLG_SLOW | MFLG_UNREG, 0,
  {mr_pong, m_ignore, ms_pong, m_ignore}
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&pong_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&pong_msgtab);
}

const char *_version = "$Revision: 1.4 $";
#endif
static void ms_pong(struct Client *client_p,
                   struct Client *source_p,
                   int parc,
                   char *parv[])
{
  struct Client *target_p;
  char  *origin, *destination;

  if (parc < 2 || *parv[1] == '\0')
    {
      sendto_one(source_p, form_str(ERR_NOORIGIN), me.name, parv[0]);
      return;
    }

  origin = parv[1];
  destination = parv[2];
  source_p->flags &= ~FLAGS_PINGSENT;

  /* Now attempt to route the PONG, comstud pointed out routable PING
   * is used for SPING.  routable PING should also probably be left in
   *        -Dianora
   * That being the case, we will route, but only for registered clients (a
   * case can be made to allow them only from servers). -Shadowfax
   */
  if (!EmptyString(destination) && !match(destination, me.name))
    {
      if ((target_p = find_client(destination)) ||
          (target_p = find_server(destination)))
        sendto_one(target_p,":%s PONG %s %s",
                   parv[0], origin, destination);
      else
        {
          sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
                     me.name, parv[0], destination);
          return;
        }
    }

#ifdef  DEBUGMODE
  else
    Debug((DEBUG_NOTICE, "PONG: %s %s", origin,
           destination ? destination : "*"));
#endif
  return;
}

static void
mr_pong(struct Client *client_p, struct Client *source_p,
                    int parc, char *parv[])
{
  if (parc == 2 && *parv[1] != '\0')
    {
      if(ConfigFileEntry.ping_cookie && source_p->user && source_p->name[0])
      {
	unsigned long incoming_ping = strtoul(parv[1], (char **)NULL, 10);
	if(incoming_ping)
	{
	  if(source_p->localClient->random_ping == incoming_ping)
	  {
		char buf[USERLEN+1];
		strlcpy(buf, source_p->username, USERLEN + 1);
		source_p->flags2 |= FLAGS2_PING_COOKIE;
		register_local_user(client_p, source_p, source_p->name, buf);
	  }
	  else
	  {
		sendto_one(source_p, form_str(ERR_WRONGPONG), me.name,
			   source_p->name, source_p->localClient->random_ping);
		return;
	  }
	}
      }
     
    }
  else
    sendto_one(source_p, form_str(ERR_NOORIGIN), me.name, parv[0]);
  
  source_p->flags &= ~FLAGS_PINGSENT;
}