1/*
2 * Copyright (c) 1988, 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)externs.h	8.3 (Berkeley) 5/30/95
34 *	$FreeBSD: src/contrib/telnet/telnet/externs.h,v 1.10 2003/05/11 18:17:00 markm Exp $
35 */
36
37#ifndef	BSD
38# define BSD 43
39#endif
40
41/*
42 * ucb stdio.h defines BSD as something weird
43 */
44#if defined(sun) && defined(__svr4__)
45#define BSD 43
46#endif
47
48#ifndef	USE_TERMIO
49# if BSD > 43 || defined(SYSV_TERMIO)
50#  define USE_TERMIO
51# endif
52#endif
53
54#include <stdio.h>
55#include <setjmp.h>
56#include <sys/ioctl.h>
57#include <errno.h>
58#ifdef	USE_TERMIO
59# ifndef	VINTR
60#  include <termios.h>
61# endif
62# define termio termios
63#endif
64#if defined(NO_CC_T) || !defined(USE_TERMIO)
65# if !defined(USE_TERMIO)
66typedef char cc_t;
67# else
68typedef unsigned char cc_t;
69# endif
70#endif
71
72#include <string.h>
73
74#if defined(IPSEC)
75#include <netinet6/ipsec.h>
76#if defined(IPSEC_POLICY_IPSEC)
77extern char *ipsec_policy_in;
78extern char *ipsec_policy_out;
79#endif
80#endif
81
82#ifndef	_POSIX_VDISABLE
83# ifdef sun
84#  include <sys/param.h>	/* pick up VDISABLE definition, mayby */
85# endif
86# ifdef VDISABLE
87#  define _POSIX_VDISABLE VDISABLE
88# else
89#  define _POSIX_VDISABLE ((cc_t)'\377')
90# endif
91#endif
92
93#define	SUBBUFSIZE	256
94
95#if	!defined(P)
96# ifdef	__STDC__
97#  define	P(x)	x
98# else
99#  define	P(x)	()
100# endif
101#endif
102
103extern int
104    autologin,		/* Autologin enabled */
105    skiprc,		/* Don't process the ~/.telnetrc file */
106    eight,		/* use eight bit mode (binary in and/or out */
107    family,		/* address family of peer */
108    flushout,		/* flush output */
109    connected,		/* Are we connected to the other side? */
110    globalmode,		/* Mode tty should be in */
111    telnetport,		/* Are we connected to the telnet port? */
112    localflow,		/* Flow control handled locally */
113    restartany,		/* If flow control, restart output on any character */
114    localchars,		/* we recognize interrupt/quit */
115    donelclchars,	/* the user has set "localchars" */
116    showoptions,
117    net,		/* Network file descriptor */
118    tin,		/* Terminal input file descriptor */
119    tout,		/* Terminal output file descriptor */
120    crlf,		/* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */
121    autoflush,		/* flush output when interrupting? */
122    autosynch,		/* send interrupt characters with SYNCH? */
123    SYNCHing,		/* Is the stream in telnet SYNCH mode? */
124    donebinarytoggle,	/* the user has put us in binary */
125    dontlecho,		/* do we suppress local echoing right now? */
126    crmod,
127    netdata,		/* Print out network data flow */
128    prettydump,		/* Print "netdata" output in user readable format */
129    termdata,		/* Print out terminal data flow */
130    telnet_debug,	/* Debug level */
131    doaddrlookup,	/* do a reverse lookup? */
132    clienteof;		/* Client received EOF */
133
134extern cc_t escape;	/* Escape to command mode */
135extern cc_t rlogin;	/* Rlogin mode escape character */
136#ifdef	KLUDGELINEMODE
137extern cc_t echoc;	/* Toggle local echoing */
138#endif
139
140extern char
141    *prompt;		/* Prompt for command. */
142
143extern char
144    doopt[],
145    dont[],
146    will[],
147    wont[],
148    options[],		/* All the little options */
149    *hostname;		/* Who are we connected to? */
150#ifdef	ENCRYPTION
151extern void (*encrypt_output)(unsigned char *, int);
152extern int (*decrypt_input)(int);
153#endif	/* ENCRYPTION */
154
155/*
156 * We keep track of each side of the option negotiation.
157 */
158
159#define	MY_STATE_WILL		0x01
160#define	MY_WANT_STATE_WILL	0x02
161#define	MY_STATE_DO		0x04
162#define	MY_WANT_STATE_DO	0x08
163
164/*
165 * Macros to check the current state of things
166 */
167
168#define	my_state_is_do(opt)		(options[opt]&MY_STATE_DO)
169#define	my_state_is_will(opt)		(options[opt]&MY_STATE_WILL)
170#define my_want_state_is_do(opt)	(options[opt]&MY_WANT_STATE_DO)
171#define my_want_state_is_will(opt)	(options[opt]&MY_WANT_STATE_WILL)
172
173#define	my_state_is_dont(opt)		(!my_state_is_do(opt))
174#define	my_state_is_wont(opt)		(!my_state_is_will(opt))
175#define my_want_state_is_dont(opt)	(!my_want_state_is_do(opt))
176#define my_want_state_is_wont(opt)	(!my_want_state_is_will(opt))
177
178#define	set_my_state_do(opt)		{options[opt] |= MY_STATE_DO;}
179#define	set_my_state_will(opt)		{options[opt] |= MY_STATE_WILL;}
180#define	set_my_want_state_do(opt)	{options[opt] |= MY_WANT_STATE_DO;}
181#define	set_my_want_state_will(opt)	{options[opt] |= MY_WANT_STATE_WILL;}
182
183#define	set_my_state_dont(opt)		{options[opt] &= ~MY_STATE_DO;}
184#define	set_my_state_wont(opt)		{options[opt] &= ~MY_STATE_WILL;}
185#define	set_my_want_state_dont(opt)	{options[opt] &= ~MY_WANT_STATE_DO;}
186#define	set_my_want_state_wont(opt)	{options[opt] &= ~MY_WANT_STATE_WILL;}
187
188/*
189 * Make everything symetrical
190 */
191
192#define	HIS_STATE_WILL			MY_STATE_DO
193#define	HIS_WANT_STATE_WILL		MY_WANT_STATE_DO
194#define HIS_STATE_DO			MY_STATE_WILL
195#define HIS_WANT_STATE_DO		MY_WANT_STATE_WILL
196
197#define	his_state_is_do			my_state_is_will
198#define	his_state_is_will		my_state_is_do
199#define his_want_state_is_do		my_want_state_is_will
200#define his_want_state_is_will		my_want_state_is_do
201
202#define	his_state_is_dont		my_state_is_wont
203#define	his_state_is_wont		my_state_is_dont
204#define his_want_state_is_dont		my_want_state_is_wont
205#define his_want_state_is_wont		my_want_state_is_dont
206
207#define	set_his_state_do		set_my_state_will
208#define	set_his_state_will		set_my_state_do
209#define	set_his_want_state_do		set_my_want_state_will
210#define	set_his_want_state_will		set_my_want_state_do
211
212#define	set_his_state_dont		set_my_state_wont
213#define	set_his_state_wont		set_my_state_dont
214#define	set_his_want_state_dont		set_my_want_state_wont
215#define	set_his_want_state_wont		set_my_want_state_dont
216
217#if	defined(USE_TERMIO)
218#define	SIG_FUNC_RET	void
219#else
220#define	SIG_FUNC_RET	int
221#endif
222
223#ifdef	SIGINFO
224extern SIG_FUNC_RET
225    ayt_status(void);
226#endif
227
228extern FILE
229    *NetTrace;		/* Where debugging output goes */
230extern unsigned char
231    NetTraceFile[];	/* Name of file where debugging output goes */
232extern void
233    SetNetTrace(char *);	/* Function to change where debugging goes */
234
235extern jmp_buf
236    peerdied,
237    toplevel;		/* For error conditions. */
238
239extern void
240    command(int, const char *, int),
241    Dump(char, unsigned char *, int),
242    env_init(void),
243    Exit(int),
244    ExitString(const char *, int),
245    init_network(void),
246    init_sys(void),
247    init_telnet(void),
248    init_terminal(void),
249    intp(void),
250    optionstatus(void),
251    printoption(const char *, int, int),
252    printsub(char, unsigned char *, int),
253    quit(void),
254    sendabort(void),
255    sendbrk(void),
256    sendeof(void),
257    sendsusp(void),
258    sendnaws(void),
259    sendayt(void),
260    setconnmode(int),
261    setcommandmode(void),
262    set_escape_char(char *s),
263    setneturg(void),
264    sys_telnet_init(void),
265    telnet(char *),
266    tel_enter_binary(int),
267    tel_leave_binary(int),
268    TerminalFlushOutput(void),
269    TerminalNewMode(int),
270    TerminalRestoreState(void),
271    TerminalSaveState(void),
272    TerminalDefaultChars(void),
273    TerminalSpeeds(long *, long *),
274    tninit(void),
275    upcase(char *),
276    willoption(int),
277    wontoption(int);
278
279extern void
280    send_do(int, int),
281    send_dont(int, int),
282    send_will(int, int),
283    send_wont(int, int);
284
285extern void
286    lm_will(unsigned char *, int),
287    lm_wont(unsigned char *, int),
288    lm_do(unsigned char *, int),
289    lm_dont(unsigned char *, int),
290    lm_mode(unsigned char *, int, int);
291
292extern void
293    slc_init(void),
294    slcstate(void),
295    slc_mode_export(void),
296    slc_mode_import(int),
297    slc_import(int),
298    slc_export(void),
299    slc(unsigned char *, int),
300    slc_check(void),
301    slc_start_reply(void),
302    slc_add_reply(unsigned char, unsigned char, cc_t),
303    slc_end_reply(void);
304extern int
305    getconnmode(void),
306    opt_welldefined(const char *),
307    NetClose(int),
308    netflush(void),
309    process_rings(int, int, int, int, int, int),
310    rlogin_susp(void),
311    SetSockOpt(int, int, int, int),
312    slc_update(void),
313    stilloob(void),
314    telrcv(void),
315    TerminalRead(char *, int),
316    TerminalWrite(char *, int),
317    TerminalAutoFlush(void),
318    TerminalWindowSize(long *, long *),
319    TerminalSpecialChars(int),
320    tn(int, char **),
321    ttyflush(int);
322
323extern void
324    env_opt(unsigned char *, int),
325    env_opt_start(void),
326    env_opt_start_info(void),
327    env_opt_add(unsigned char *),
328    env_opt_end(int);
329
330extern unsigned char
331    *env_default(int, int),
332    *env_getvalue(const unsigned char *);
333
334extern int
335    get_status(char *),
336    dosynch(char *);
337
338extern cc_t
339    *tcval(int);
340
341#ifndef	USE_TERMIO
342
343extern struct	tchars ntc;
344extern struct	ltchars nltc;
345extern struct	sgttyb nttyb;
346
347# define termEofChar		ntc.t_eofc
348# define termEraseChar		nttyb.sg_erase
349# define termFlushChar		nltc.t_flushc
350# define termIntChar		ntc.t_intrc
351# define termKillChar		nttyb.sg_kill
352# define termLiteralNextChar	nltc.t_lnextc
353# define termQuitChar		ntc.t_quitc
354# define termSuspChar		nltc.t_suspc
355# define termRprntChar		nltc.t_rprntc
356# define termWerasChar		nltc.t_werasc
357# define termStartChar		ntc.t_startc
358# define termStopChar		ntc.t_stopc
359# define termForw1Char		ntc.t_brkc
360extern cc_t termForw2Char;
361extern cc_t termAytChar;
362
363# define termEofCharp		(cc_t *)&ntc.t_eofc
364# define termEraseCharp		(cc_t *)&nttyb.sg_erase
365# define termFlushCharp		(cc_t *)&nltc.t_flushc
366# define termIntCharp		(cc_t *)&ntc.t_intrc
367# define termKillCharp		(cc_t *)&nttyb.sg_kill
368# define termLiteralNextCharp	(cc_t *)&nltc.t_lnextc
369# define termQuitCharp		(cc_t *)&ntc.t_quitc
370# define termSuspCharp		(cc_t *)&nltc.t_suspc
371# define termRprntCharp		(cc_t *)&nltc.t_rprntc
372# define termWerasCharp		(cc_t *)&nltc.t_werasc
373# define termStartCharp		(cc_t *)&ntc.t_startc
374# define termStopCharp		(cc_t *)&ntc.t_stopc
375# define termForw1Charp		(cc_t *)&ntc.t_brkc
376# define termForw2Charp		(cc_t *)&termForw2Char
377# define termAytCharp		(cc_t *)&termAytChar
378
379# else
380
381extern struct	termio new_tc;
382
383# define termEofChar		new_tc.c_cc[VEOF]
384# define termEraseChar		new_tc.c_cc[VERASE]
385# define termIntChar		new_tc.c_cc[VINTR]
386# define termKillChar		new_tc.c_cc[VKILL]
387# define termQuitChar		new_tc.c_cc[VQUIT]
388
389# ifndef	VSUSP
390extern cc_t termSuspChar;
391# else
392#  define termSuspChar		new_tc.c_cc[VSUSP]
393# endif
394# if	defined(VFLUSHO) && !defined(VDISCARD)
395#  define VDISCARD VFLUSHO
396# endif
397# ifndef	VDISCARD
398extern cc_t termFlushChar;
399# else
400#  define termFlushChar		new_tc.c_cc[VDISCARD]
401# endif
402# ifndef VWERASE
403extern cc_t termWerasChar;
404# else
405#  define termWerasChar		new_tc.c_cc[VWERASE]
406# endif
407# ifndef	VREPRINT
408extern cc_t termRprntChar;
409# else
410#  define termRprntChar		new_tc.c_cc[VREPRINT]
411# endif
412# ifndef	VLNEXT
413extern cc_t termLiteralNextChar;
414# else
415#  define termLiteralNextChar	new_tc.c_cc[VLNEXT]
416# endif
417# ifndef	VSTART
418extern cc_t termStartChar;
419# else
420#  define termStartChar		new_tc.c_cc[VSTART]
421# endif
422# ifndef	VSTOP
423extern cc_t termStopChar;
424# else
425#  define termStopChar		new_tc.c_cc[VSTOP]
426# endif
427# ifndef	VEOL
428extern cc_t termForw1Char;
429# else
430#  define termForw1Char		new_tc.c_cc[VEOL]
431# endif
432# ifndef	VEOL2
433extern cc_t termForw2Char;
434# else
435#  define termForw2Char		new_tc.c_cc[VEOL]
436# endif
437# ifndef	VSTATUS
438extern cc_t termAytChar;
439#else
440#  define termAytChar		new_tc.c_cc[VSTATUS]
441#endif
442
443# if defined(__STDC__)
444#  define termEofCharp		&termEofChar
445#  define termEraseCharp	&termEraseChar
446#  define termIntCharp		&termIntChar
447#  define termKillCharp		&termKillChar
448#  define termQuitCharp		&termQuitChar
449#  define termSuspCharp		&termSuspChar
450#  define termFlushCharp	&termFlushChar
451#  define termWerasCharp	&termWerasChar
452#  define termRprntCharp	&termRprntChar
453#  define termLiteralNextCharp	&termLiteralNextChar
454#  define termStartCharp	&termStartChar
455#  define termStopCharp		&termStopChar
456#  define termForw1Charp	&termForw1Char
457#  define termForw2Charp	&termForw2Char
458#  define termAytCharp		&termAytChar
459# else
460	/* Work around a compiler bug */
461#  define termEofCharp		0
462#  define termEraseCharp	0
463#  define termIntCharp		0
464#  define termKillCharp		0
465#  define termQuitCharp		0
466#  define termSuspCharp		0
467#  define termFlushCharp	0
468#  define termWerasCharp	0
469#  define termRprntCharp	0
470#  define termLiteralNextCharp	0
471#  define termStartCharp	0
472#  define termStopCharp		0
473#  define termForw1Charp	0
474#  define termForw2Charp	0
475#  define termAytCharp		0
476# endif
477#endif
478
479
480/* Ring buffer structures which are shared */
481
482extern Ring
483    netoring,
484    netiring,
485    ttyoring,
486    ttyiring;
487
488extern void
489    xmitAO(void),
490    xmitEC(void),
491    xmitEL(void);
492