/*
  Copyright (C) 1995-2023 Free Software Foundation, Inc.

  This file is part of GNU Inetutils.

  GNU Inetutils 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 3 of the License, or (at
  your option) any later version.

  GNU Inetutils 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, see `http://www.gnu.org/licenses/'. */

/*
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <config.h>

#if defined AUTHENTICATION || defined ENCRYPTION
# include <unistd.h>
# include <sys/types.h>
# include <arpa/telnet.h>
# include <libtelnet/encrypt.h>
# include <libtelnet/misc.h>

# include "general.h"
# include "ring.h"
# include "externs.h"
# include "defines.h"
# include "types.h"

int
net_write (unsigned char *str, int len)
{
  if (NETROOM () > len)
    {
      ring_supply_data (&netoring, str, len);
      if (str[0] == IAC && str[1] == SE)
	printsub ('>', &str[2], len - 2);
      return (len);
    }
  return (0);
}

void
net_encrypt ()
{
# ifdef	ENCRYPTION
  if (encrypt_output)
    ring_encrypt (&netoring, encrypt_output);
  else
    ring_clearto (&netoring);
# endif/* ENCRYPTION */
}

int
telnet_spin ()
{
  return (-1);
}

char *
telnet_getenv (char *val, bool exported_only)
{
  return ((char *) env_getvalue (val, exported_only));
}

char *
telnet_gets (char *prompt, char *result, int length, int echo)
{
# if !HAVE_DECL_GETPASS
  extern char *getpass ();
# endif
  extern int globalmode;
  int om = globalmode;
  char *res;

  TerminalNewMode (-1);
  if (echo)
    {
      printf ("%s", prompt);
      res = fgets (result, length, stdin);
    }
  else
    {
      res = getpass (prompt);
      if (res)
	{
	  strncpy (result, res, length);
	  memset (res, 0, strlen (res));
	  res = result;
	}
    }
  TerminalNewMode (om);
  return (res);
}
#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */
