Home | History | Annotate | Line # | Download | only in telnetd
defs.h revision 1.12
      1 /*	$NetBSD: defs.h,v 1.12 2002/09/18 20:58:56 mycroft Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1989, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	from: @(#)defs.h	8.1 (Berkeley) 6/4/93
     36  */
     37 
     38 /*
     39  * Telnet server defines
     40  */
     41 #include <sys/types.h>
     42 #include <sys/param.h>
     43 
     44 #ifndef	BSD
     45 # define	BSD 43
     46 #endif
     47 
     48 #if	defined(CRAY) && !defined(LINEMODE)
     49 # define SYSV_TERMIO
     50 # define LINEMODE
     51 # define KLUDGELINEMODE
     52 # define DIAGNOSTICS
     53 # define BFTPDAEMON
     54 # define HAS_IP_TOS
     55 #endif /* CRAY */
     56 
     57 #if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
     58 #define TELOPTS
     59 #define TELCMDS
     60 #define	SLC_NAMES
     61 #endif
     62 
     63 #if	defined(SYSV_TERMIO) && !defined(USE_TERMIO)
     64 # define	USE_TERMIO
     65 #endif
     66 
     67 #include <sys/socket.h>
     68 #ifndef	CRAY
     69 #include <sys/wait.h>
     70 #endif	/* CRAY */
     71 #include <fcntl.h>
     72 #include <sys/file.h>
     73 #include <sys/stat.h>
     74 #include <sys/time.h>
     75 #include <sys/poll.h>
     76 #ifndef	FILIO_H
     77 #include <sys/ioctl.h>
     78 #else
     79 #include <sys/filio.h>
     80 #endif
     81 
     82 #include <netinet/in.h>
     83 
     84 #include <arpa/telnet.h>
     85 
     86 #include <stdio.h>
     87 #include <stdlib.h>
     88 #include <signal.h>
     89 #include <errno.h>
     90 #include <netdb.h>
     91 #include <syslog.h>
     92 #ifndef	LOG_DAEMON
     93 #define	LOG_DAEMON	0
     94 #endif
     95 #ifndef	LOG_ODELAY
     96 #define	LOG_ODELAY	0
     97 #endif
     98 #include <ctype.h>
     99 #ifndef NO_STRING_H
    100 #include <string.h>
    101 #else
    102 #include <strings.h>
    103 #endif
    104 
    105 #ifndef	USE_TERMIO
    106 #include <sgtty.h>
    107 #else
    108 # ifdef	SYSV_TERMIO
    109 # include <termio.h>
    110 # else
    111 # include <termios.h>
    112 # endif
    113 #endif
    114 #if !defined(USE_TERMIO) || defined(NO_CC_T)
    115 typedef unsigned char cc_t;
    116 #endif
    117 
    118 #include <time.h>
    119 
    120 #include <unistd.h>
    121 
    122 #ifndef _POSIX_VDISABLE
    123 # ifdef VDISABLE
    124 #  define _POSIX_VDISABLE VDISABLE
    125 # else
    126 #  define _POSIX_VDISABLE ((unsigned char)'\377')
    127 # endif
    128 #endif
    129 
    130 
    131 #ifdef	CRAY
    132 #include <memory.h>
    133 #endif	/* CRAY */
    134 
    135 #ifdef __hpux
    136 #include <sys/ptyio.h>
    137 #endif
    138 
    139 #if	!defined(TIOCSCTTY) && defined(TCSETCTTY)
    140 # define	TIOCSCTTY TCSETCTTY
    141 #endif
    142 
    143 #ifndef	FD_SET
    144 #ifndef	HAVE_fd_set
    145 typedef struct fd_set { int fds_bits[1]; } fd_set;
    146 #endif
    147 
    148 #define	FD_SET(n, p)	((p)->fds_bits[0] |= (1<<(n)))
    149 #define	FD_CLR(n, p)	((p)->fds_bits[0] &= ~(1<<(n)))
    150 #define	FD_ISSET(n, p)	((p)->fds_bits[0] & (1<<(n)))
    151 #define FD_ZERO(p)	((p)->fds_bits[0] = 0)
    152 #endif	/* FD_SET */
    153 
    154 /*
    155  * I/O data buffers defines
    156  */
    157 #define	NETSLOP	64
    158 #ifdef CRAY
    159 #undef BUFSIZ
    160 #define BUFSIZ  2048
    161 #endif
    162 
    163 #define	NIACCUM(c)	{   *netip++ = c; \
    164 			    ncc++; \
    165 			}
    166 
    167 /* clock manipulations */
    168 #define	settimer(x)	(clocks.x = ++clocks.system)
    169 #define	sequenceIs(x,y)	(clocks.x < clocks.y)
    170 
    171 /*
    172  * Linemode support states, in decreasing order of importance
    173  */
    174 #define REAL_LINEMODE	0x04
    175 #define KLUDGE_OK	0x03
    176 #define	NO_AUTOKLUDGE	0x02
    177 #define KLUDGE_LINEMODE	0x01
    178 #define NO_LINEMODE	0x00
    179 
    180 /*
    181  * Structures of information for each special character function.
    182  */
    183 typedef struct {
    184 	unsigned char	flag;		/* the flags for this function */
    185 	cc_t		val;		/* the value of the special character */
    186 } slcent, *Slcent;
    187 
    188 typedef struct {
    189 	slcent		defset;		/* the default settings */
    190 	slcent		current;	/* the current settings */
    191 	cc_t		*sptr;		/* a pointer to the char in */
    192 					/* system data structures */
    193 } slcfun, *Slcfun;
    194 
    195 #ifdef DIAGNOSTICS
    196 /*
    197  * Diagnostics capabilities
    198  */
    199 #define	TD_REPORT	0x01	/* Report operations to client */
    200 #define TD_EXERCISE	0x02	/* Exercise client's implementation */
    201 #define TD_NETDATA	0x04	/* Display received data stream */
    202 #define TD_PTYDATA	0x08	/* Display data passed to pty */
    203 #define	TD_OPTIONS	0x10	/* Report just telnet options */
    204 #endif /* DIAGNOSTICS */
    205 
    206 /*
    207  * We keep track of each side of the option negotiation.
    208  */
    209 
    210 #define	MY_STATE_WILL		0x01
    211 #define	MY_WANT_STATE_WILL	0x02
    212 #define	MY_STATE_DO		0x04
    213 #define	MY_WANT_STATE_DO	0x08
    214 
    215 /*
    216  * Macros to check the current state of things
    217  */
    218 
    219 #define	my_state_is_do(opt)		(options[opt]&MY_STATE_DO)
    220 #define	my_state_is_will(opt)		(options[opt]&MY_STATE_WILL)
    221 #define my_want_state_is_do(opt)	(options[opt]&MY_WANT_STATE_DO)
    222 #define my_want_state_is_will(opt)	(options[opt]&MY_WANT_STATE_WILL)
    223 
    224 #define	my_state_is_dont(opt)		(!my_state_is_do(opt))
    225 #define	my_state_is_wont(opt)		(!my_state_is_will(opt))
    226 #define my_want_state_is_dont(opt)	(!my_want_state_is_do(opt))
    227 #define my_want_state_is_wont(opt)	(!my_want_state_is_will(opt))
    228 
    229 #define	set_my_state_do(opt)		(options[opt] |= MY_STATE_DO)
    230 #define	set_my_state_will(opt)		(options[opt] |= MY_STATE_WILL)
    231 #define	set_my_want_state_do(opt)	(options[opt] |= MY_WANT_STATE_DO)
    232 #define	set_my_want_state_will(opt)	(options[opt] |= MY_WANT_STATE_WILL)
    233 
    234 #define	set_my_state_dont(opt)		(options[opt] &= ~MY_STATE_DO)
    235 #define	set_my_state_wont(opt)		(options[opt] &= ~MY_STATE_WILL)
    236 #define	set_my_want_state_dont(opt)	(options[opt] &= ~MY_WANT_STATE_DO)
    237 #define	set_my_want_state_wont(opt)	(options[opt] &= ~MY_WANT_STATE_WILL)
    238 
    239 /*
    240  * Tricky code here.  What we want to know is if the MY_STATE_WILL
    241  * and MY_WANT_STATE_WILL bits have the same value.  Since the two
    242  * bits are adjacent, a little arithmatic will show that by adding
    243  * in the lower bit, the upper bit will be set if the two bits were
    244  * different, and clear if they were the same.
    245  */
    246 #define my_will_wont_is_changing(opt) \
    247 			((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)
    248 
    249 #define my_do_dont_is_changing(opt) \
    250 			((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)
    251 
    252 /*
    253  * Make everything symmetrical
    254  */
    255 
    256 #define	HIS_STATE_WILL			MY_STATE_DO
    257 #define	HIS_WANT_STATE_WILL		MY_WANT_STATE_DO
    258 #define HIS_STATE_DO			MY_STATE_WILL
    259 #define HIS_WANT_STATE_DO		MY_WANT_STATE_WILL
    260 
    261 #define	his_state_is_do			my_state_is_will
    262 #define	his_state_is_will		my_state_is_do
    263 #define his_want_state_is_do		my_want_state_is_will
    264 #define his_want_state_is_will		my_want_state_is_do
    265 
    266 #define	his_state_is_dont		my_state_is_wont
    267 #define	his_state_is_wont		my_state_is_dont
    268 #define his_want_state_is_dont		my_want_state_is_wont
    269 #define his_want_state_is_wont		my_want_state_is_dont
    270 
    271 #define	set_his_state_do		set_my_state_will
    272 #define	set_his_state_will		set_my_state_do
    273 #define	set_his_want_state_do		set_my_want_state_will
    274 #define	set_his_want_state_will		set_my_want_state_do
    275 
    276 #define	set_his_state_dont		set_my_state_wont
    277 #define	set_his_state_wont		set_my_state_dont
    278 #define	set_his_want_state_dont		set_my_want_state_wont
    279 #define	set_his_want_state_wont		set_my_want_state_dont
    280 
    281 #define his_will_wont_is_changing	my_do_dont_is_changing
    282 #define his_do_dont_is_changing		my_will_wont_is_changing
    283 
    284 /*
    285  * Initialization buffer for tty device [16 characters long]
    286  */
    287 #define NULL16STR	"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
    288