/*
  Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
  2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014,
  2015, 2016, 2017, 2018, 2019, 2020, 2021 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) 1988, 1990, 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 <unistd.h>

#ifndef BSD
# define BSD 43
#endif


#define USE_TERMIO

/*
 * ucb stdio.h defines BSD as something wierd
 */
#if defined sun && defined __svr4__
# define BSD 43
#endif

#ifndef USE_TERMIO
# if BSD > 43 || defined SYSV_TERMIO
#  define USE_TERMIO
# endif
#endif

#include <stdio.h>
#include <setjmp.h>
#if defined CRAY && !defined NO_BSD_SETJMP
# include <bsdsetjmp.h>
#endif
#include <sys/ioctl.h>
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#include <errno.h>
#ifdef	USE_TERMIO
# ifndef VINTR
#  ifdef SYSV_TERMIO
#   include <termio.h>
#  else
#   include <termios.h>
#  endif
# endif
#endif
#if defined NO_CC_T || !defined USE_TERMIO
# if !defined USE_TERMIO
typedef char cc_t;
# else
typedef unsigned char cc_t;
# endif
#endif

#if defined USE_TERMIO && !defined SYSV_TERMIO
# define termio termios
#endif

#ifndef NO_STRING_H
# include <string.h>
#else
# include <strings.h>
#endif

#ifndef _POSIX_VDISABLE
# ifdef sun
#  include <sys/param.h>	/* pick up VDISABLE definition, maybe */
# endif
# ifdef VDISABLE
#  define _POSIX_VDISABLE VDISABLE
# else
#  define _POSIX_VDISABLE ((cc_t)'\377')
# endif
#endif

#define SUBBUFSIZE	256

extern int autologin,		/* Autologin enabled */
  skiprc,			/* Don't process the ~/.telnetrc file */
  eight,			/* use eight bit mode (binary in and/or out */
  flushout,			/* flush output */
  connected,			/* Are we connected to the other side? */
  globalmode,			/* Mode tty should be in */
  In3270,			/* Are we in 3270 mode? */
  telnetport,			/* Are we connected to the telnet port? */
  localflow,			/* Flow control handled locally */
  restartany,			/* If flow control, restart output on any character */
  localchars,			/* we recognize interrupt/quit */
  donelclchars,			/* the user has set "localchars" */
  showoptions, net,		/* Network file descriptor */
  tin,				/* Terminal input file descriptor */
  tout,				/* Terminal output file descriptor */
  crlf,				/* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */
  autoflush,			/* flush output when interrupting? */
  autosynch,			/* send interrupt characters with SYNCH? */
  SYNCHing,			/* Is the stream in telnet SYNCH mode? */
  donebinarytoggle,		/* the user has put us in binary */
  dontlecho,			/* do we suppress local echoing right now? */
  crmod, netdata,		/* Print out network data flow */
  prettydump,			/* Print "netdata" output in user readable format */
#if defined TN3270
  cursesdata,			/* Print out curses data flow */
  apitrace,			/* Trace API transactions */
#endif
	/* defined(TN3270) */
  termdata,			/* Print out terminal data flow */
  debug;			/* Debug level */

extern cc_t escape;		/* Escape to command mode */
extern cc_t rlogin;		/* Rlogin mode escape character */
#ifdef	KLUDGELINEMODE
extern cc_t echoc;		/* Toggle local echoing */
#endif

extern char *prompt;		/* Prompt for command. */

extern char doopt[], dont[], will[], wont[], options[],	/* All the little options */
 *hostname;			/* Who are we connected to? */
#ifdef	ENCRYPTION
extern void (*encrypt_output) (unsigned char *, int);
extern int (*decrypt_input) (int);
#endif /* ENCRYPTION */

/*
 * We keep track of each side of the option negotiation.
 */

#define MY_STATE_WILL		0x01
#define MY_WANT_STATE_WILL	0x02
#define MY_STATE_DO		0x04
#define MY_WANT_STATE_DO	0x08

/*
 * Macros to check the current state of things
 */

#define my_state_is_do(opt)		(options[opt]&MY_STATE_DO)
#define my_state_is_will(opt)		(options[opt]&MY_STATE_WILL)
#define my_want_state_is_do(opt)	(options[opt]&MY_WANT_STATE_DO)
#define my_want_state_is_will(opt)	(options[opt]&MY_WANT_STATE_WILL)

#define my_state_is_dont(opt)		(!my_state_is_do(opt))
#define my_state_is_wont(opt)		(!my_state_is_will(opt))
#define my_want_state_is_dont(opt)	(!my_want_state_is_do(opt))
#define my_want_state_is_wont(opt)	(!my_want_state_is_will(opt))

#define set_my_state_do(opt)		{options[opt] |= MY_STATE_DO;}
#define set_my_state_will(opt)		{options[opt] |= MY_STATE_WILL;}
#define set_my_want_state_do(opt)	{options[opt] |= MY_WANT_STATE_DO;}
#define set_my_want_state_will(opt)	{options[opt] |= MY_WANT_STATE_WILL;}

#define set_my_state_dont(opt)		{options[opt] &= ~MY_STATE_DO;}
#define set_my_state_wont(opt)		{options[opt] &= ~MY_STATE_WILL;}
#define set_my_want_state_dont(opt)	{options[opt] &= ~MY_WANT_STATE_DO;}
#define set_my_want_state_wont(opt)	{options[opt] &= ~MY_WANT_STATE_WILL;}

/*
 * Make everything symetrical
 */

#define HIS_STATE_WILL			MY_STATE_DO
#define HIS_WANT_STATE_WILL		MY_WANT_STATE_DO
#define HIS_STATE_DO			MY_STATE_WILL
#define HIS_WANT_STATE_DO		MY_WANT_STATE_WILL

#define his_state_is_do			my_state_is_will
#define his_state_is_will		my_state_is_do
#define his_want_state_is_do		my_want_state_is_will
#define his_want_state_is_will		my_want_state_is_do

#define his_state_is_dont		my_state_is_wont
#define his_state_is_wont		my_state_is_dont
#define his_want_state_is_dont		my_want_state_is_wont
#define his_want_state_is_wont		my_want_state_is_dont

#define set_his_state_do		set_my_state_will
#define set_his_state_will		set_my_state_do
#define set_his_want_state_do		set_my_want_state_will
#define set_his_want_state_will		set_my_want_state_do

#define set_his_state_dont		set_my_state_wont
#define set_his_state_wont		set_my_state_dont
#define set_his_want_state_dont		set_my_want_state_wont
#define set_his_want_state_wont		set_my_want_state_dont


extern FILE *NetTrace;		/* Where debugging output goes */
extern unsigned char NetTraceFile[];	/* Name of file where debugging output goes */
extern void SetNetTrace (char *);	/* Function to change where debugging goes */

extern jmp_buf peerdied, toplevel;	/* For error conditions. */

extern void
command (int, char *, int),
Dump (char, unsigned char *, int),
init_3270 (void),
printoption (char *, int, int),
printsub (char, unsigned char *, int),
sendnaws (void),
setconnmode (int),
setcommandmode (void),
setneturg (void),
sys_telnet_init (void),
telnet (char *),
tel_enter_binary (int),
tel_leave_binary (int),
TerminalFlushOutput (void),
TerminalNewMode (int),
TerminalRestoreState (void),
TerminalSaveState (void),
tninit (void), upcase (char *), willoption (int), wontoption (int);

extern int TerminalWindowSize (long *rows, long *cols);
extern void TerminalSpeeds (long *ispeed, long *ospeed);
extern void TerminalDefaultChars (void);
extern int TerminalSpecialChars (int c);
extern int TerminalAutoFlush (void);
extern int TerminalWrite (char *buf, int n);

extern int telrcv (void);
extern int getconnmode (void);
extern void optionstatus (void);
extern int NetClose (int);
extern void Exit (int);
extern void ExitString (char *, int);
extern int netflush (void);
extern int opt_welldefined (char *);
extern int stilloob (void);
extern int process_rings (int, int, int, int, int, int);

extern void init_terminal (void);
extern void init_network (void);
extern void init_telnet (void);
extern void init_sys (void);

extern void set_escape_char (char*);
extern int tn (int argc, char **argv);

extern void
send_do (int, int),
send_dont (int, int), send_will (int, int), send_wont (int, int);

extern void sendabort (void);
extern void sendeof (void);
extern void sendsusp (void);
extern int ttyflush (int);
extern int rlogin_susp (void);
extern void env_init (void);

/* FIXME: Not needed */
int SetSockOpt (int fd, int level, int option, int yesno);

extern int quit (void);

extern void
lm_will (unsigned char *, int),
lm_wont (unsigned char *, int),
lm_do (unsigned char *, int),
lm_dont (unsigned char *, int), lm_mode (unsigned char *, int, int);

extern void
slc_init (void),
slcstate (void),
slc_mode_export (void),
slc_mode_import (int),
slc_import (int),
slc_export (void),
slc (unsigned char *, int),
slc_check (void),
slc_start_reply (void),
slc_add_reply (unsigned char, unsigned char, cc_t), slc_end_reply (void);
extern int slc_update (void);

extern void
env_opt (unsigned char *, int),
env_opt_start (void),
env_opt_start_info (void), env_opt_add (unsigned char *), env_opt_end (int);

extern unsigned char *env_default (int, int), *env_getvalue (const char *);

extern int get_status (void), dosynch (void);

extern cc_t *tcval (int);

#ifndef USE_TERMIO

extern struct tchars ntc;
extern struct ltchars nltc;
extern struct sgttyb nttyb;

# define termEofChar		ntc.t_eofc
# define termEraseChar		nttyb.sg_erase
# define termFlushChar		nltc.t_flushc
# define termIntChar		ntc.t_intrc
# define termKillChar		nttyb.sg_kill
# define termLiteralNextChar	nltc.t_lnextc
# define termQuitChar		ntc.t_quitc
# define termSuspChar		nltc.t_suspc
# define termRprntChar		nltc.t_rprntc
# define termWerasChar		nltc.t_werasc
# define termStartChar		ntc.t_startc
# define termStopChar		ntc.t_stopc
# define termForw1Char		ntc.t_brkc
extern cc_t termForw2Char;
extern cc_t termAytChar;

# define termEofCharp		(cc_t *)&ntc.t_eofc
# define termEraseCharp		(cc_t *)&nttyb.sg_erase
# define termFlushCharp		(cc_t *)&nltc.t_flushc
# define termIntCharp		(cc_t *)&ntc.t_intrc
# define termKillCharp		(cc_t *)&nttyb.sg_kill
# define termLiteralNextCharp	(cc_t *)&nltc.t_lnextc
# define termQuitCharp		(cc_t *)&ntc.t_quitc
# define termSuspCharp		(cc_t *)&nltc.t_suspc
# define termRprntCharp		(cc_t *)&nltc.t_rprntc
# define termWerasCharp		(cc_t *)&nltc.t_werasc
# define termStartCharp		(cc_t *)&ntc.t_startc
# define termStopCharp		(cc_t *)&ntc.t_stopc
# define termForw1Charp		(cc_t *)&ntc.t_brkc
# define termForw2Charp		(cc_t *)&termForw2Char
# define termAytCharp		(cc_t *)&termAytChar

#else

extern struct termio new_tc;

# define termEofChar		new_tc.c_cc[VEOF]
# define termEraseChar		new_tc.c_cc[VERASE]
# define termIntChar		new_tc.c_cc[VINTR]
# define termKillChar		new_tc.c_cc[VKILL]
# define termQuitChar		new_tc.c_cc[VQUIT]

# ifndef VSUSP
extern cc_t termSuspChar;
# else
#  define termSuspChar		new_tc.c_cc[VSUSP]
# endif
# if defined VFLUSHO && !defined VDISCARD
#  define VDISCARD VFLUSHO
# endif
# ifndef VDISCARD
extern cc_t termFlushChar;
# else
#  define termFlushChar		new_tc.c_cc[VDISCARD]
# endif
# ifndef VWERASE
extern cc_t termWerasChar;
# else
#  define termWerasChar		new_tc.c_cc[VWERASE]
# endif
# ifndef VREPRINT
extern cc_t termRprntChar;
# else
#  define termRprntChar		new_tc.c_cc[VREPRINT]
# endif
# ifndef VLNEXT
extern cc_t termLiteralNextChar;
# else
#  define termLiteralNextChar	new_tc.c_cc[VLNEXT]
# endif
# ifndef VSTART
extern cc_t termStartChar;
# else
#  define termStartChar		new_tc.c_cc[VSTART]
# endif
# ifndef VSTOP
extern cc_t termStopChar;
# else
#  define termStopChar		new_tc.c_cc[VSTOP]
# endif
# ifndef VEOL
extern cc_t termForw1Char;
# else
#  define termForw1Char		new_tc.c_cc[VEOL]
# endif
# ifndef VEOL2
extern cc_t termForw2Char;
# else
#  define termForw2Char		new_tc.c_cc[VEOL]
# endif
# ifndef VSTATUS
extern cc_t termAytChar;
# else
#  define termAytChar		new_tc.c_cc[VSTATUS]
# endif

# if !defined CRAY || defined __STDC__
#  define termEofCharp		&termEofChar
#  define termEraseCharp	&termEraseChar
#  define termIntCharp		&termIntChar
#  define termKillCharp		&termKillChar
#  define termQuitCharp		&termQuitChar
#  define termSuspCharp		&termSuspChar
#  define termFlushCharp	&termFlushChar
#  define termWerasCharp	&termWerasChar
#  define termRprntCharp	&termRprntChar
#  define termLiteralNextCharp	&termLiteralNextChar
#  define termStartCharp	&termStartChar
#  define termStopCharp		&termStopChar
#  define termForw1Charp	&termForw1Char
#  define termForw2Charp	&termForw2Char
#  define termAytCharp		&termAytChar
# else
	/* Work around a compiler bug */
#  define termEofCharp		0
#  define termEraseCharp	0
#  define termIntCharp		0
#  define termKillCharp		0
#  define termQuitCharp		0
#  define termSuspCharp		0
#  define termFlushCharp	0
#  define termWerasCharp	0
#  define termRprntCharp	0
#  define termLiteralNextCharp	0
#  define termStartCharp	0
#  define termStopCharp		0
#  define termForw1Charp	0
#  define termForw2Charp	0
#  define termAytCharp		0
# endif
#endif


/* Ring buffer structures which are shared */

extern Ring netoring, netiring, ttyoring, ttyiring;

/* Tn3270 section */
#if defined TN3270

extern int HaveInput,		/* Whether an asynchronous I/O indication came in */
  noasynchtty,			/* Don't do signals on I/O (SIGURG, SIGIO) */
  noasynchnet,			/* Don't do signals on I/O (SIGURG, SIGIO) */
  sigiocount,			/* Count of SIGIO receptions */
  shell_active;			/* Subshell is active */

extern char *Ibackp,		/* Oldest byte of 3270 data */
  Ibuf[],			/* 3270 buffer */
 *Ifrontp,			/* Where next 3270 byte goes */
  tline[], *transcom;		/* Transparent command */

extern int settranscom (int, char **);

extern void inputAvailable (int);
#endif /* defined(TN3270) */
