/*
 * Copyright (c) 1989, 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.
 *
 *      @(#)defs.h      8.1 (Berkeley) 6/4/93
 * $FreeBSD$
 */

/*
 * Telnet server defines
 */
#include <sys/types.h>
#include <sys/param.h>

#ifndef BSD
# define        BSD 43
#endif

#if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
#define TELOPTS
#define TELCMDS
#define SLC_NAMES
#endif

#if     defined(SYSV_TERMIO) && !defined(USE_TERMIO)
# define        USE_TERMIO
#endif

#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#ifndef FILIO_H
#include <sys/ioctl.h>
#else
#include <sys/filio.h>
#endif

#include <netinet/in.h>

#include <arpa/telnet.h>

#include <stdio.h>
#ifdef  __STDC__
#include <stdlib.h>
#endif
#include <signal.h>
#include <errno.h>
#include <netdb.h>
#include <syslog.h>
#ifndef LOG_DAEMON
#define LOG_DAEMON      0
#endif
#ifndef LOG_ODELAY
#define LOG_ODELAY      0
#endif
#include <ctype.h>
#ifndef NO_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif

#ifndef USE_TERMIO
#include <sgtty.h>
#else
# ifdef SYSV_TERMIO
# include <termio.h>
# else
# include <termios.h>
# endif
#endif
#if !defined(USE_TERMIO) || defined(NO_CC_T)
typedef unsigned char cc_t;
#endif

#ifdef  __STDC__
#include <unistd.h>
#endif

#ifndef _POSIX_VDISABLE
# ifdef VDISABLE
#  define _POSIX_VDISABLE VDISABLE
# else
#  define _POSIX_VDISABLE ((unsigned char)'\377')
# endif
#endif

#if     !defined(TIOCSCTTY) && defined(TCSETCTTY)
# define        TIOCSCTTY TCSETCTTY
#endif

#ifndef FD_SET
#ifndef HAVE_fd_set
typedef struct fd_set { int fds_bits[1]; } fd_set;
#endif

#define FD_SET(n, p)    ((p)->fds_bits[0] |= (1<<(n)))
#define FD_CLR(n, p)    ((p)->fds_bits[0] &= ~(1<<(n)))
#define FD_ISSET(n, p)  ((p)->fds_bits[0] & (1<<(n)))
#define FD_ZERO(p)      ((p)->fds_bits[0] = 0)
#endif  /* FD_SET */

/*
 * I/O data buffers defines
 */
#define NETSLOP 64

#define NIACCUM(c)      {   *netip++ = c; \
                            ncc++; \
                        }

/* clock manipulations */
#define settimer(x)     (clocks.x = ++clocks.system)
#define sequenceIs(x,y) (clocks.x < clocks.y)

/*
 * Linemode support states, in decreasing order of importance
 */
#define REAL_LINEMODE   0x04
#define KLUDGE_OK       0x03
#define NO_AUTOKLUDGE   0x02
#define KLUDGE_LINEMODE 0x01
#define NO_LINEMODE     0x00

/*
 * Structures of information for each special character function.
 */
typedef struct {
        unsigned char   flag;           /* the flags for this function */
        cc_t            val;            /* the value of the special character */
} slcent, *Slcent;

typedef struct {
        slcent          defset;         /* the default settings */
        slcent          current;        /* the current settings */
        cc_t            *sptr;          /* a pointer to the char in */
                                        /* system data structures */
} slcfun, *Slcfun;

#ifdef DIAGNOSTICS
/*
 * Diagnostics capabilities
 */
#define TD_REPORT       0x01    /* Report operations to client */
#define TD_EXERCISE     0x02    /* Exercise client's implementation */
#define TD_NETDATA      0x04    /* Display received data stream */
#define TD_PTYDATA      0x08    /* Display data passed to pty */
#define TD_OPTIONS      0x10    /* Report just telnet options */
#endif /* DIAGNOSTICS */

/*
 * 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)

/*
 * Tricky code here.  What we want to know is if the MY_STATE_WILL
 * and MY_WANT_STATE_WILL bits have the same value.  Since the two
 * bits are adjacent, a little arithmatic will show that by adding
 * in the lower bit, the upper bit will be set if the two bits were
 * different, and clear if they were the same.
 */
#define my_will_wont_is_changing(opt) \
                        ((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)

#define my_do_dont_is_changing(opt) \
                        ((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)

/*
 * 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

#define his_will_wont_is_changing       my_do_dont_is_changing
#define his_do_dont_is_changing         my_will_wont_is_changing