/************************************************************************
 *   IRC - Internet Relay Chat, src/m_pass.c
 *   Copyright (C) 1990 Jarkko Oikarinen and
 *                      University of Oulu, Computing Center
 *
 *   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.
 *
 *  $Id: m_pass.c,v 1.1.1.2 2001/02/02 20:59:50 jpinto Exp $
 */
#include "m_commands.h"  /* m_pass prototype */
#include "client.h"      /* client struct */
#include "irc_string.h"  /* strncpy_irc */
#include "send.h"        /* sendto_one */
#include "numeric.h"     /* ERR_xxx */
#include "ircd.h"        /* me */

/*
 * m_functions execute protocol messages on this server:
 *
 *      cptr    is always NON-NULL, pointing to a *LOCAL* client
 *              structure (with an open socket connected!). This
 *              identifies the physical socket where the message
 *              originated (or which caused the m_function to be
 *              executed--some m_functions may call others...).
 *
 *      sptr    is the source of the message, defined by the
 *              prefix part of the message if present. If not
 *              or prefix not found, then sptr==cptr.
 *
 *              (!IsServer(cptr)) => (cptr == sptr), because
 *              prefixes are taken *only* from servers...
 *
 *              (IsServer(cptr))
 *                      (sptr == cptr) => the message didn't
 *                      have the prefix.
 *
 *                      (sptr != cptr && IsServer(sptr) means
 *                      the prefix specified servername. (?)
 *
 *                      (sptr != cptr && !IsServer(sptr) means
 *                      that message originated from a remote
 *                      user (not local).
 *
 *              combining
 *
 *              (!IsServer(sptr)) means that, sptr can safely
 *              taken as defining the target structure of the
 *              message in this server.
 *
 *      *Always* true (if 'parse' and others are working correct):
 *
 *      1)      sptr->from == cptr  (note: cptr->from == cptr)
 *
 *      2)      MyConnect(sptr) <=> sptr == cptr (e.g. sptr
 *              *cannot* be a local connection, unless it's
 *              actually cptr!). [MyConnect(x) should probably
 *              be defined as (x == x->from) --msa ]
 *
 *      parc    number of variable parameter strings (if zero,
 *              parv is allowed to be NULL)
 *
 *      parv    a NULL terminated list of parameter pointers,
 *
 *                      parv[0], sender (prefix string), if not present
 *                              this points to an empty string.
 *                      parv[1]...parv[parc-1]
 *                              pointers to additional parameters
 *                      parv[parc] == NULL, *always*
 *
 *              note:   it is guaranteed that parv[0]..parv[parc-1] are all
 *                      non-NULL pointers.
 */

/*
 * m_pass() - Added Sat, 4 March 1989
 *
 *
 * m_pass - PASS message handler
 *      parv[0] = sender prefix
 *      parv[1] = password
 *      parv[2] = optional extra version information
 */
int m_pass(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
  char* password = parc > 1 ? parv[1] : NULL;

  if (EmptyString(password))
    {
      sendto_one(cptr, form_str(ERR_NEEDMOREPARAMS),
                 MENAME(cptr), parv[0], "PASS");
      return 0;
    }
  if (!MyConnect(sptr) || (!IsUnknown(cptr) && !IsHandshake(cptr)))
    {
      sendto_one(cptr, form_str(ERR_ALREADYREGISTRED),
                 MENAME(cptr), parv[0]);
      return 0;
    }
  strncpy_irc(cptr->passwd, password, PASSWDLEN);
  if (parc > 2)
    {
      /* 
       * It looks to me as if orabidoo wanted to have more
       * than one set of option strings possible here...
       * i.e. ":AABBTS" as long as TS was the last two chars
       * however, as we are now using CAPAB, I think we can
       * safely assume if there is a ":TS" then its a TS server
       * -Dianora
       */
      if (0 == irccmp(parv[2], "TS") && (cptr->tsinfo == 0))
        cptr->tsinfo = TS_DOESTS;
    }
  return 0;
}

