/*
 *   IRC - Internet Relay Chat, src/modules/m_setident.c
 *   (C) 1999-2001 Carsten Munk (Techie/Stskeeps) <stskeeps@tspre.org>
 *
 *   See file AUTHORS in IRC package for additional names of
 *   the programmers. 
 *
 *   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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include "config.h"
#include "struct.h"
#include "common.h"
#include "sys.h"
#include "numeric.h"
#include "msg.h"
#include "channel.h"
#include <time.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <io.h>
#endif
#include <fcntl.h>
#include "h.h"
#ifdef STRIPBADWORDS
#include "badwords.h"
#endif
#ifdef _WIN32
#include "version.h"
#endif

#define MSG_SETIDENT 	"SETIDENT"	/* set ident */
#define	TOK_SETIDENT	"AD"	/* good old BASIC ;P */

DLLFUNC int m_setident(aClient *cptr, aClient *sptr, int parc, char *parv[]);
#ifndef DYNAMIC_LINKING
ModuleInfo m_setident_info
#else
#define m_setident_info mod_header
ModuleInfo mod_header
#endif
  = {
  	2,
	"setident",	/* Name of module */
	"$Id$", /* Version */
	"/setident", /* Short description of module */
	NULL, /* Pointer to our dlopen() return value */
	NULL 
    };

/*
 * The purpose of these ifdefs, are that we can "static" link the ircd if we
 * want to
*/

#ifdef DYNAMIC_LINKING
DLLFUNC int	mod_init(int module_load)
#else
int    m_setident_init(int module_load)
#endif
{
	/*
	 * We call our add_Command crap here
	*/
	add_Command(MSG_SETIDENT, TOK_SETIDENT, m_setident, MAXPARA);
}

#ifdef DYNAMIC_LINKING
DLLFUNC int	mod_load(int module_load)
#else
int	m_setident_load(int module_load)
#endif
{
}
#ifdef DYNAMIC_LINKING
DLLFUNC void	mod_unload(void)
#else
void	m_setident_unload(void)
#endif
{
	if (del_Command(MSG_SETIDENT, TOK_SETIDENT, m_setident) < 0)
	{
		sendto_realops("Failed to delete commands when unloading %s",
				m_setident_info.name);
	}
}

/* m_setident - 12/05/1999 - Stskeeps
 *  :prefix SETIDENT newident
 *  parv[0] - sender
 *  parv[1] - newident
 *  D: This will set your username to be <x> (like (/setident Root))
 *     (if you are IRCop) **efg*
 *     Very experimental currently
 * 	   Cloning of m_sethost at some points - so same authors ;P
*/

DLLFUNC int m_setident(aClient *cptr, aClient *sptr, int parc, char *parv[])
{

	char *vident, *s;
#ifndef DISABLE_USERMOD
	int  permit = 0;	/* 0 = opers(glob/locop) 1 = global oper */
#else
	int  permit = 2;
#endif
	int  legalident = 1;	/* is legal characters? */
	if (!MyConnect(sptr))
		goto permit_2;
	switch (permit)
	{
	  case 0:
		  if (!IsAnOper(sptr))
		  {
			  sendto_one(sptr, err_str(ERR_NOPRIVILEGES), me.name,
			      parv[0]);
			  return 0;
		  }
		  break;
	  case 1:
		  if (!IsOper(sptr))
		  {
			  sendto_one(sptr, err_str(ERR_NOPRIVILEGES), me.name,
			      parv[0]);
			  return 0;
		  }
		  break;
	  case 2:
		  if (MyConnect(sptr))
		  {
			  sendto_one(sptr, err_str(ERR_NOPRIVILEGES), me.name,
			      parv[0]);
			  return 0;
		  }
		  break;
	  default:
		  sendto_ops_butone(IsServer(cptr) ? cptr : NULL, sptr,
		      ":%s WALLOPS :[SETIDENT] Somebody fixing this corrupted server? !(0|1) !!!",
		      me.name);
		  break;
	}
      permit_2:
	if (parc < 2)
		vident = NULL;
	else
		vident = parv[1];

	/* bad bad bad boys .. ;p */
	if (vident == NULL)
	{
		if (MyConnect(sptr))
		{
			sendto_one(sptr,
			    ":%s NOTICE %s :*** Syntax: /SetIdent <new host>",
			    me.name, parv[0]);
		}
		return 1;
	}
	if (strlen(parv[1]) < 1)
	{
		if (MyConnect(sptr))
			sendto_one(sptr,
			    ":%s NOTICE %s :*** /SetIdent Error: Atleast write SOMETHING that makes sense (':' string)",
			    me.name, sptr->name);
		return 0;
	}

	/* too large huh? */
	if (strlen(vident) > (USERLEN))
	{
		/* ignore us as well if we're not a child of 3k */
		if (MyConnect(sptr))
			sendto_one(sptr,
			    ":%s NOTICE %s :*** /SetIdent Error: Usernames are limited to %i characters.",
			    me.name, sptr->name, USERLEN);
		return 0;
	}

	/* illegal?! */
	for (s = vident; *s; s++)
	{
		if (!isallowed(*s))
		{
			legalident = 0;
		}
		if (*s == '~')
			legalident = 1;

	}

	if (legalident == 0)
	{
		sendto_one(sptr,
		    ":%s NOTICE %s :*** /SetIdent Error: A username may contain a-z, A-Z, 0-9, '-', '~' & '.' - Please only use them",
		    me.name, parv[0]);
		return 0;
	}

	/* get it in */
	ircsprintf(sptr->user->username, "%s", vident);
	/* spread it out */
	sendto_serv_butone_token(cptr, sptr->name,
	    MSG_SETIDENT, TOK_SETIDENT, "%s", parv[1]);

	if (MyConnect(sptr))
	{
		sendto_one(sptr,
		    ":%s NOTICE %s :Your nick!user@host-mask is now (%s!%s@%s) - To disable ident set change it manually by /setident'ing again",
		    me.name, parv[0], parv[0], sptr->user->username,
		    IsHidden(sptr) ? sptr->user->virthost : sptr->
		    user->realhost);
	}
	return;
}