Import NetBSD telnet(1)

Change-Id: Ib58b43cc9baabe183a59410212827f65ec117277

usr.bin/Makefile

@@ -26,7 +26,7 @@ SUBDIR= asa \
 	\
 	sdiff sed seq shar shlock \
 	shuffle  sort split stat su \
-	tail tee tic time touch \
+	tail tee telnet tic time touch \
 	tput \
 	tr true tsort tty ul uname unexpand unifdef \
 	uniq units unvis unzip users \

usr.bin/telnet/Makefile

@@ -0,0 +1,89 @@
+#	$NetBSD: Makefile,v 1.50 2012/08/10 12:10:27 joerg Exp $
+#
+# Copyright (c) 1990 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. All advertising materials mentioning features or use of this software
+#    must display the following acknowledgement:
+#	This product includes software developed by the University of
+#	California, Berkeley and its contributors.
+# 4. 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.
+#
+#	from: @(#)Makefile	8.1 (Berkeley) 6/6/93
+#
+
+WARNS?=	4	# XXX -Wshadow etc.  fix asap
+CWARNFLAGS.clang+=	-Wno-tautological-compare -Wno-format-security
+
+.include <bsd.own.mk>
+
+USE_FORT?= yes	# network client
+
+PROG=	telnet
+
+CPPFLAGS+=-DKLUDGELINEMODE -DUSE_TERMIO -DENV_HACK
+CPPFLAGS+=-I${.CURDIR}
+
+LDADD+= -lterminfo ${LIBTELNETDIR}/libtelnet.a
+DPADD+=	${LIBTERMINFO} ${LIBTELNETDIR}/libtelnet.a
+
+SRCS=	authenc.c commands.c main.c network.c ring.c sys_bsd.c telnet.c \
+	terminal.c tn3270.c utilities.c
+
+CPPFLAGS+=-I${NETBSDSRCDIR}/lib
+.if !defined(__MINIX)
+CPPFLAGS+=-DIPSEC
+LDADD+=	-lipsec
+DPADD+=	${LIBIPSEC}
+.endif # !defined(__MINIX)
+
+.if (${USE_INET6} != "no")
+CPPFLAGS+=-DINET6
+.endif
+
+LIBTELNETDIR!=	cd ${.CURDIR}/../../lib/libtelnet; ${PRINTOBJDIR}
+
+.if (${USE_KERBEROS} != "no")
+CPPFLAGS+=-DKRB5 -DFORWARD
+LDADD+= -lkrb5 -lasn1 -lcom_err -lroken
+DPADD+=	${LIBKRB5} ${LIBASN1} ${LIBCOM_ERR} ${LIBROKEN}
+.endif
+
+.if (${MKCRYPTO} != "no")
+CPPFLAGS+=-DAUTHENTICATION -DENCRYPTION
+LDADD+= -ldes -lcrypto -lcrypt
+DPADD+=	${LIBDES} ${LIBCRYPTO} ${LIBCRYPT}
+.endif
+
+.if (${USE_PAM} != "no")
+LDADD+= -lpam ${PAM_STATIC_LDADD}
+DPADD+=	${LIBPAM} ${PAM_STATIC_DPADD}
+.endif
+
+.for f in commands telnet terminal utilities
+COPTS.${f}.c+=  -Wno-pointer-sign
+.endfor
+
+.include <bsd.prog.mk>

usr.bin/telnet/README

@@ -0,0 +1,763 @@
+
+This is a distribution of both client and server telnet.  These programs
+have been compiled on:
+			telnet	telnetd
+	4.4 BSD-Lite	  x	  x
+	4.3 BSD Reno	  X	  X
+	UNICOS 9.1	  X	  X
+	UNICOS 9.0	  X	  X
+	UNICOS 8.0	  X	  X
+	BSDI 2.0	  X	  X
+	Solaris 2.4       x       x (no linemode in server)
+	SunOs 4.1.4	  X	  X (no linemode in server)
+	Ultrix 4.3	  X	  X (no linemode in server)
+	Ultrix 4.1	  X	  X (no linemode in server)
+
+In addition, previous versions have been compiled on the following
+machines, but were not available for testing this version.
+			telnet	telnetd
+	Next1.0		  X	  X
+	UNICOS 8.3	  X	  X
+	UNICOS 7.C	  X	  X
+	UNICOS 7.0	  X	  X
+	SunOs 4.0.3c	  X	  X (no linemode in server)
+	4.3 BSD		  X  	  X (no linemode in server)
+	DYNIX V3.0.12	  X	  X (no linemode in server)
+	Ultrix 3.1	  X	  X (no linemode in server)
+	Ultrix 4.0	  X	  X (no linemode in server)
+	SunOs 3.5	  X	  X (no linemode in server)
+	SunOs 4.1.3	  X	  X (no linemode in server)
+	Solaris 2.2       x       x (no linemode in server)
+	Solaris 2.3       x       x (no linemode in server)
+	BSDI 1.0	  X	  X
+	BSDI 1.1	  X	  X
+	DYNIX V3.0.17.9	  X	  X (no linemode in server)
+	HP-UX 8.0	  x       x (no linemode in server)
+
+This code should work, but there are no guarantees.
+
+Oct 23, 1995
+
+This is a bugfix release.
+
+	The change in the previous release from using makeutx() to
+	pututxline() caused problems on SunOS/Solaris.  It has been
+	changed back to using makeutx().  Symptoms include users
+	getting error messages when logging in about not being able
+	to open the tty.
+
+	Using memmove() instead of memcpy() caused problems under
+	SunOS 4.x, since it doesn't have memmove().  Config.generic
+	has been modified to include mem.o for SunOS 4.x.
+
+	Some new code was added to telnetd to do some environment
+	variable cleanup before execing login.  Thanks to Sam Hartman
+	at MIT for pointing this out.
+
+	A couple of other minor bugfixes.
+
+May 30, 1995
+
+This release represents what is on the 4.4BSD-Lite2 release, which
+should be the final BSD release.  I will continue to support of
+telnet, The code (without encryption) is available via anonymous ftp
+from ftp.cray.com, in src/telnet/telnet.YY.MM.DD.NE.tar.Z, where
+YY.MM.DD is replaced with the year, month and day of the release.
+If you can't find it at one of these places, at some point in the
+near future information about the latest releases should be available
+from ftp.borman.com.
+
+In addition, the version with the encryption code is available via
+ftp from net-dist.mit.edu, in the directory /pub/telnet.  There
+is a README file there that gives further information on how
+to get the distribution.
+
+Questions, comments, bug reports and bug fixes can be sent to
+one of these addresses:
+		dab@borman.com
+		dab@cray.com
+		dab@bsdi.com
+
+This release is mainly bug fixes and code cleanup.
+
+	Replace all calls to bcopy()/bzero() with calls to
+	memmove()/memset() and all calls to index()/rindex()
+	with calls to strchr()/strrchr().
+
+	Add some missing diagnostics for option tracing
+	to telnetd.
+
+	Add support for BSDI 2.0 and Solaris 2.4.
+
+	Add support for UNICOS 8.0
+
+	Get rid of expanded tabs and trailing white spaces.
+
+	From Paul Vixie:
+		Fix for telnet going into an endless spin
+		when the session dies abnormally.
+
+	From Jef Poskanzer:
+		Changes to allow telnet to compile
+		under SunOS 3.5.
+
+	From Philip Guenther:
+		makeutx() doesn't expand utmpx,
+		use pututxline() instead.
+
+	From Chris Torek:
+		Add a sleep(1) before execing login
+		to avoid race condition that can eat
+		up the login prompt.
+		Use terminal speed directly if it is
+		not an encoded value.
+
+	From Steve Parker:
+		Fix to realloc() call.  Fix for execing
+		login on solaris with no user name.
+
+January 19, 1994
+
+This is a list of some of the changes since the last tar release
+of telnet/telnetd.  There are probably other changes that aren't
+listed here, but this should hit a lot of the main ones.
+
+   General:
+	Changed #define for AUTHENTICATE to AUTHENTICATION
+	Changed #define for ENCRYPT to ENCRYPTION
+	Changed #define for DES_ENCRYPT to DES_ENCRYPTION
+
+	Added support for SPX authentication: -DSPX
+
+	Added support for Kerberos Version 5 authentication: -DKRB5
+
+	Added support for ANSI C function prototypes
+
+	Added support for the NEW-ENVIRON option (RFC-1572)
+	including support for USERVAR.
+
+	Made support for the old Environment Option (RFC-1408)
+	conditional on -DOLD_ENVIRON
+
+	Added #define ENV_HACK - support for RFC 1571
+
+	The encryption code is removed from the public distributions.
+	Domestic 4.4 BSD distributions contain the encryption code.
+
+	ENV_HACK: Code to deal with systems that only implement
+		the old ENVIRON option, and have reversed definitions
+		of ENV_VAR and ENV_VAL.  Also fixes ENV processing in
+		client to handle things besides just the default set...
+
+	NO_BSD_SETJMP: UNICOS configuration for
+		UNICOS 6.1/6.0/5.1/5.0 systems.
+
+	STREAMSPTY: Use /dev/ptmx to get a clean pty.  This
+		is for SVr4 derivatives (Like Solaris)
+
+	UTMPX: For systems that have /etc/utmpx. This is for
+		SVr4 derivatives (Like Solaris)
+
+	Definitions for BSDI 1.0
+
+	Definitions for 4.3 Reno and 4.4 BSD.
+
+	Definitions for UNICOS 8.0 and UNICOS 7.C
+
+	Definitions for Solaris 2.0
+
+	Definitions for HP-UX 8.0
+
+	Latest Copyright notices from Berkeley.
+
+	FLOW-CONTROL: support for RFC-XXXx
+
+
+   Client Specific:
+
+	Fix the "send" command to not send garbage...
+
+	Fix status message for "skiprc"
+
+	Make sure to send NAWS after telnet has been suspended
+	or an external command has been run, if the window size
+	has changed.
+
+	sysV88 support.
+
+   Server Specific:
+
+	Support flowcontrol option in non-linemode servers.
+
+	-k Server supports Kludge Linemode, but will default to
+	   either single character mode or real Linemode support.
+	   The user will have to explicitly ask to switch into
+	   kludge linemode. ("stty extproc", or escape back to
+	   to telnet and say "mode line".)
+
+	-u Specify the length of the hostname field in the utmp
+	   file.  Hostname longer than this length will be put
+	   into the utmp file in dotted decimal notation, rather
+	   than putting in a truncated hostname.
+	
+	-U Registered hosts only.  If a reverse hostname lookup
+	   fails, the connection will be refused.
+
+	-f/-F
+	   Allows forwarding of credentials for KRB5.
+
+February 22, 1991:
+
+    Features:
+
+	This version of telnet/telnetd has support for both
+	the AUTHENTICATION and ENCRYPTION options.  The
+	AUTHENTICATION option is fairly well defined, and
+	an option number has been assigned to it.  The
+	ENCRYPTION option is still in a state of flux; an
+	option number has been assigned to, but it is still
+	subject to change.  The code is provided in this release
+	for experimental and testing purposes.
+
+	The telnet "send" command can now be used to send
+	do/dont/will/wont commands, with any telnet option
+	name.  The rules for when do/dont/will/wont are sent
+	are still followed, so just because the user requests
+	that one of these be sent doesn't mean that it will
+	be sent...
+
+	The telnet "getstatus" command no longer requires
+	that option printing be enabled to see the response
+	to the "DO STATUS" command.
+
+	A -n flag has been added to telnetd to disable
+	keepalives.
+
+	A new telnet command, "auth" has been added (if
+	AUTHENTICATE is defined).  It has four sub-commands,
+	"status", "disable", "enable" and "help".
+
+	A new telnet command, "encrypt" has been added (if
+	ENCRYPT is defined).  It has many sub-commands:
+	"enable", "type", "start", "stop", "input",
+	"-input", "output", "-output", "status", and "help".
+
+	The LOGOUT option is now supported by both telnet
+	and telnetd, a new command, "logout", was added
+	to support this.
+
+	Several new toggle options were added:
+	    "autoencrypt", "autodecrypt", "autologin", "authdebug",
+	    "encdebug", "skiprc", "verbose_encrypt"
+
+	An "rlogin" interface has been added.  If the program
+	is named "rlogin", or the "-r" flag is given, then
+	an rlogin type of interface will be used.
+		~.	Terminates the session
+		~<susp> Suspend the session
+		~^]	Escape to telnet command mode
+		~~	Pass through the ~.
+	    BUG: If you type the rlogin escape character
+		 in the middle of a line while in rlogin
+		 mode, you cannot erase it or any characters
+		 before it.  Hopefully this can be fixed
+		 in a future release...
+
+    General changes:
+
+	A "libtelnet.a" has now been created.  This library
+	contains code that is common to both telnet and
+	telnetd.  This is also where library routines that
+	are needed, but are not in the standard C library,
+	are placed.
+
+	The makefiles have been re-done.  All of the site
+	specific configuration information has now been put
+	into a single "Config.generic" file, in the top level
+	directory.  Changing this one file will take care of
+	all three subdirectories.  Also, to add a new/local
+	definition, a "Config.local" file may be created
+	at the top level; if that file exists, the subdirectories
+	will use that file instead of "Config.generic".
+
+	Many 1-2 line functions in commands.c have been
+	removed, and just inserted in-line, or replaced
+	with a macro.
+
+    Bug Fixes:
+
+	The non-termio code in both telnet and telnetd was
+	setting/clearing CTLECH in the sg_flags word.  This
+	was incorrect, and has been changed to set/clear the
+	LCTLECH bit in the local mode word.
+
+	The SRCRT #define has been removed.  If IP_OPTIONS
+	and IPPROTO_IP are defined on the system, then the
+	source route code is automatically enabled.
+
+	The NO_GETTYTAB #define has been removed; there
+	is a compatibility routine that can be built into
+	libtelnet to achieve the same results.
+
+	The server, telnetd, has been switched to use getopt()
+	for parsing the argument list.
+
+	The code for getting the input/output speeds via
+	cfgetispeed()/cfgetospeed() was still not quite
+	right in telnet.  Posix says if the ispeed is 0,
+	then it is really equal to the ospeed.
+
+	The suboption processing code in telnet now has
+	explicit checks to make sure that we received
+	the entire suboption (telnetd was already doing this).
+
+	The telnet code for processing the terminal type
+	could cause a core dump if an existing connection
+	was closed, and a new connection opened without
+	exiting telnet.
+
+	Telnetd was doing a TCSADRAIN when setting the new
+	terminal settings;  This is not good, because it means
+	that the tcsetattr() will hang waiting for output to
+	drain, and telnetd is the only one that will drain
+	the output...  The fix is to use TCSANOW which does
+	not wait.
+
+	Telnetd was improperly setting/clearing the ISTRIP
+	flag in the c_lflag field, it should be using the
+	c_iflag field. 
+
+	When the child process of telnetd was opening the
+	slave side of the pty, it was re-setting the EXTPROC
+	bit too early, and some of the other initialization
+	code was wiping it out.  This would cause telnetd
+	to go out of linemode and into single character mode.
+
+	One instance of leaving linemode in telnetd forgot
+	to send a WILL ECHO to the client, the net result
+	would be that the user would see double character
+	echo.
+
+	If the MODE was being changed several times very
+	quickly, telnetd could get out of sync with the
+	state changes and the returning acks; and wind up
+	being left in the wrong state.
+
+September 14, 1990:
+
+	Switch the client to use getopt() for parsing the
+	argument list.  The 4.3Reno getopt.c is included for
+	systems that don't have getopt().
+
+	Use the posix _POSIX_VDISABLE value for what value
+	to use when disabling special characters.  If this
+	is undefined, it defaults to 0x3ff.
+
+	For non-termio systems, TIOCSETP was being used to
+	change the state of the terminal.  This causes the
+	input queue to be flushed, which we don't want.  This
+	is now changed to TIOCSETN.
+
+	Take out the "#ifdef notdef" around the code in the
+	server that generates a "sync" when the pty output
+	is flushed.  The potential problem is that some older
+	telnet clients may go into an infinite loop when they
+	receive a "sync", if so, the server can be compiled
+	with "NO_URGENT" defined.
+
+	Fix the client where it was setting/clearing the OPOST
+	bit in the c_lflag field, not the c_oflag field.
+
+	Fix the client where it was setting/clearing the ISTRIP
+	bit in the c_lflag field, not the c_iflag field.  (On
+	4.3Reno, this is the ECHOPRT bit in the c_lflag field.)
+	The client also had its interpretation of WILL BINARY
+	and DO BINARY reversed.
+
+	Fix a bug in client that would cause a core dump when
+	attempting to remove the last environment variable.
+
+	In the client, there were a few places were switch()
+	was being passed a character, and if it was a negative
+	value, it could get sign extended, and not match
+	the 8 bit case statements.  The fix is to and the
+	switch value with 0xff.
+
+	Add a couple more printoption() calls in the client, I
+	don't think there are any more places were a telnet
+	command can be received and not printed out when
+	"options" is on.
+
+	A new flag has been added to the client, "-a".  Currently,
+	this just causes the USER name to be sent across, in
+	the future this may be used to signify that automatic
+	authentication is requested.
+
+	The USER variable is now only sent by the client if
+	the "-a" or "-l user" options are explicitly used, or
+	if the user explicitly asks for the "USER" environment
+	variable to be exported.  In the server, if it receives
+	the "USER" environment variable, it won't print out the
+	banner message, so that only "Password:" will be printed.
+	This makes the semantics more like rlogin, and should be
+	more familiar to the user.  (People are not used to
+	getting a banner message, and then getting just a
+	"Password:" prompt.)
+
+	Re-vamp the code for starting up the child login
+	process.  The code was getting ugly, and it was
+	hard to tell what was really going on.  What we
+	do now is after the fork(), in the child:
+		1) make sure we have no controlling tty
+		2) open and initialize the tty
+		3) do a setsid()/setpgrp()
+		4) makes the tty our controlling tty.
+	On some systems, #2 makes the tty our controlling
+	tty, and #4 is a no-op.  The parent process does
+	a gets rid of any controlling tty after the child
+	is fork()ed.
+
+	Use the strdup() library routine in telnet, instead
+	of the local savestr() routine.  If you don't have
+	strdup(), you need to define NO_STRDUP.
+
+	Add support for ^T (SIGINFO/VSTATUS), found in the
+	4.3Reno distribution.  This maps to the AYT character.
+	You need a 4-line bugfix in the kernel to get this
+	to work properly:
+
+	> *** tty_pty.c.ORG	Tue Sep 11 09:41:53 1990
+	> --- tty_pty.c	Tue Sep 11 17:48:03 1990
+	> ***************
+	> *** 609,613 ****
+	> 			if ((tp->t_lflag&NOFLSH) == 0)
+	> 				ttyflush(tp, FREAD|FWRITE);
+	> ! 			pgsignal(tp->t_pgrp, *(unsigned int *)data);
+	> 			return(0);
+	> 		}
+	> --- 609,616 ----
+	> 			if ((tp->t_lflag&NOFLSH) == 0)
+	> 				ttyflush(tp, FREAD|FWRITE);
+	> ! 			pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
+	> ! 			if ((*(unsigned int *)data == SIGINFO) &&
+	> ! 			    ((tp->t_lflag&NOKERNINFO) == 0))
+	> ! 				ttyinfo(tp);
+	> 			return(0);
+	> 		}
+
+	The client is now smarter when setting the telnet escape
+	character; it only sets it to one of VEOL and VEOL2 if
+	one of them is undefined, and the other one is not already
+	defined to the telnet escape character.
+
+	Handle TERMIOS systems that have separate input and output
+	line speed settings embedded in the flags.
+
+	Many other minor bug fixes.
+
+June 20, 1990:
+	Re-organize makefiles and source tree.  The telnet/Source
+	directory is now gone, and all the source that was in
+	telnet/Source is now just in the telnet directory.
+
+	Separate makefile for each system are now gone.  There
+	are two makefiles, Makefile and Makefile.generic.
+	The "Makefile" has the definitions for the various
+	system, and "Makefile.generic" does all the work.
+	There is a variable called "WHAT" that is used to
+	specify what to make.  For example, in the telnet
+	directory, you might say:
+		make 4.4bsd WHAT=clean
+	to clean out the directory.
+
+	Add support for the ENVIRON and XDISPLOC options.
+	In order for the server to work, login has to have
+	the "-p" option to preserve environment variables.
+
+	Add the SOFT_TAB and LIT_ECHO modes in the LINEMODE support.
+
+	Add the "-l user" option to command line and open command
+	(This is passed through the ENVIRON option).
+
+	Add the "-e" command line option, for setting the escape
+	character.
+
+	Add the "-D", diagnostic, option to the server.  This allows
+	the server to print out debug information, which is very
+	useful when trying to debug a telnet that doesn't have any
+	debugging ability.
+
+	Turn off the literal next character when not in LINEMODE.
+
+	Don't recognize ^Y locally, just pass it through.
+
+	Make minor modifications for Sun4.0 and Sun4.1
+
+	Add support for both FORW1 and FORW2 characters.  The
+	telnet escape character is set to whichever of the
+	two is not being used.  If both are in use, the escape
+	character is not set, so when in linemode the user will
+	have to follow the escape character with a <CR> or <EOF)
+	to get it passed through.
+
+	Commands can now be put in single and double quotes, and
+	a backslash is now an escape character.  This is needed
+	for allowing arbitrary strings to be assigned to environment
+	variables.
+
+	Switch telnetd to use macros like telnet for keeping
+	track of the state of all the options.
+
+	Fix telnetd's processing of options so that we always do
+	the right processing of the LINEMODE option, regardless
+	of who initiates the request to turn it on.  Also, make
+	sure that if the other side went "WILL ECHO" in response
+	to our "DO ECHO", that we send a "DONT ECHO" to get the
+	option turned back off!
+
+	Fix the TERMIOS setting of the terminal speed to handle both
+	BSD's separate fields, and the SYSV method of CBAUD bits.
+
+	Change how we deal with the other side refusing to enable
+	an option.  The sequence used to be: send DO option; receive
+	WONT option; send DONT option.  Now, the sequence is: send
+	DO option; receive WONT option.  Both should be valid
+	according to the spec, but there has been at least one
+	client implementation of telnet identified that can get
+	really confused by this.  (The exact sequence, from a trace
+	on the server side, is (numbers are number of responses that
+	we expect to get after that line...):
+
+		send WILL ECHO	1 (initial request)
+		send WONT ECHO	2 (server is changing state)
+		recv DO ECHO	1 (first reply, ok.  expect DONT ECHO next)
+		send WILL ECHO	2 (server changes state again)
+		recv DONT ECHO	1 (second reply, ok.  expect DO ECHO next)
+		recv DONT ECHO	0 (third reply, wrong answer. got DONT!!!)
+	***	send WONT ECHO	  (send WONT to acknowledge the DONT)
+		send WILL ECHO	1 (ask again to enable option)
+		recv DO ECHO	0
+
+		recv DONT ECHO	0
+		send WONT ECHO	1
+		recv DONT ECHO	0
+		recv DO ECHO	1
+		send WILL ECHO	0
+		(and the last 5 lines loop forever)
+
+	The line with the "***" is last of the WILL/DONT/WONT sequence.
+	The change to the server to not generate that makes this same
+	example become:
+
+		send will ECHO	1
+		send wont ECHO	2
+		recv do ECHO	1
+		send will ECHO	2
+		recv dont ECHO	1
+		recv dont ECHO	0
+		recv do ECHO	1
+		send will ECHO	0
+
+	There is other option negotiation going on, and not sending
+	the third part changes some of the timings, but this specific
+	example no longer gets stuck in a loop.  The "telnet.state"
+	file has been modified to reflect this change to the algorithm.
+
+	A bunch of miscellaneous bug fixes and changes to make
+	lint happier.
+
+	This version of telnet also has some KERBEROS stuff in
+	it. This has not been tested, it uses an un-authorized
+	telnet option number, and uses an out-of-date version
+	of the (still being defined) AUTHENTICATION option.
+	There is no support for this code, do not enable it.
+
+
+March 1, 1990:
+CHANGES/BUGFIXES SINCE LAST RELEASE:
+	Some support for IP TOS has been added.  Requires that the
+	kernel support the IP_TOS socket option (currently this
+	is only in UNICOS 6.0).
+
+	Both telnet and telnetd now use the cc_t typedef.  typedefs are
+	included for systems that don't have it (in termios.h).
+
+	SLC_SUSP was not supported properly before.  It is now.
+
+	IAC EOF was not translated  properly in telnetd for SYSV_TERMIO
+	when not in linemode.  It now saves a copy of the VEOF character,
+	so that when ICANON is turned off and we can't trust it anymore
+	(because it is now the VMIN character) we use the saved value.
+
+	There were two missing "break" commands in the linemode
+	processing code in telnetd.
+
+	Telnetd wasn't setting the kernel window size information
+	properly.  It was using the rows for both rows and columns...
+
+Questions/comments go to
+		David Borman
+		Cray Research, Inc.
+		655F Lone Oak Drive
+		Eagan, MN 55123
+		dab@cray.com.
+
+README:	You are reading it.
+
+Config.generic:
+	This file contains all the OS specific definitions.  It
+	has pre-definitions for many common system types, and is
+	in standard makefile format.  See the comments at the top
+	of the file for more information.
+
+Config.local:
+	This is not part of the distribution, but if this file exists,
+	it is used instead of "Config.generic".  This allows site
+	specific configuration without having to modify the distributed
+	"Config.generic" file.
+
+kern.diff:
+	This file contains the diffs for the changes needed for the
+	kernel to support LINEMODE is the server.  These changes are
+	for a 4.3BSD system.  You may need to make some changes for
+	your particular system.
+
+	There is a new bit in the terminal state word, TS_EXTPROC.
+	When this bit is set, several aspects of the terminal driver
+	are disabled.  Input line editing, character echo, and
+	mapping of signals are all disabled.  This allows the telnetd
+	to turn of these functions when in linemode, but still keep
+	track of what state the user wants the terminal to be in.
+
+	New ioctl()s:
+
+		TIOCEXT		Turn on/off the TS_EXTPROC bit
+		TIOCGSTATE	Get t_state of tty to look at TS_EXTPROC bit
+		TIOCSIG		Generate a signal to processes in the
+				current process group of the pty.
+
+	There is a new mode for packet driver, the TIOCPKT_IOCTL bit.
+	When packet mode is turned on in the pty, and the TS_EXTPROC
+	bit is set, then whenever the state of the pty is changed, the
+	next read on the master side of the pty will have the TIOCPKT_IOCTL
+	bit set, and the data will contain the following:
+		struct xx {
+			struct sgttyb a;
+			struct tchars b;
+			struct ltchars c;
+			int t_state;
+			int t_flags;
+		}
+	This allows the process on the server side of the pty to know
+	when the state of the terminal has changed, and what the new
+	state is.
+
+	However, if you define USE_TERMIO or SYSV_TERMIO, the code will
+	expect that the structure returned in the TIOCPKT_IOCTL is
+	the termio/termios structure.
+
+stty.diff:
+	This file contains the changes needed for the stty(1) program
+	to report on the current status of the TS_EXTPROC bit.  It also
+	allows the user to turn on/off the TS_EXTPROC bit.  This is useful
+	because it allows the user to say "stty -extproc", and the
+	LINEMODE option will be automatically disabled, and saying "stty
+	extproc" will re-enable the LINEMODE option.
+
+telnet.state:
+	Both the client and server have code in them to deal
+	with option negotiation loops.  The algorithm that is
+	used is described in this file.
+
+telnet:
+	This directory contains the client code.  No kernel changes are
+	needed to use this code.
+
+telnetd:
+	This directory contains the server code.  If LINEMODE or KLUDGELINEMODE
+	are defined, then the kernel modifications listed above are needed.
+
+libtelnet:
+	This directory contains code that is common to both the client
+	and the server.
+
+arpa:
+	This directory has a new <arpa/telnet.h>
+
+libtelnet/Makefile.4.4:
+telnet/Makefile.4.4:
+telnetd/Makefile.4.4:
+	These are the makefiles that can be used on a 4.3Reno
+	system when this software is installed in /usr/src/lib/libtelnet,
+	/usr/src/libexec/telnetd, and /usr/src/usr.bin/telnet.
+
+
+The following TELNET options are supported:
+	
+	LINEMODE:
+		The LINEMODE option is supported as per RFC1116.  The
+		FORWARDMASK option is not currently supported.
+
+	BINARY: The client has the ability to turn on/off the BINARY
+		option in each direction.  Turning on BINARY from
+		server to client causes the LITOUT bit to get set in
+		the terminal driver on both ends,  turning on BINARY
+		from the client to the server causes the PASS8 bit
+		to get set in the terminal driver on both ends.
+
+	TERMINAL-TYPE:
+		This is supported as per RFC1091.  On the server side,
+		when a terminal type is received, termcap/terminfo
+		is consulted to determine if it is a known terminal
+		type.  It keeps requesting terminal types until it
+		gets one that it recognizes, or hits the end of the
+		list.  The server side looks up the entry in the
+		termcap/terminfo data base, and generates a list of
+		names which it then passes one at a time to each
+		request for a terminal type, duplicating the last
+		entry in the list before cycling back to the beginning.
+
+	NAWS:	The Negotiate about Window Size, as per RFC 1073.
+
+	TERMINAL-SPEED:
+		Implemented as per RFC 1079
+
+	TOGGLE-FLOW-CONTROL:
+		Implemented as per RFC 1080
+
+	TIMING-MARK:
+		As per RFC 860
+
+	SGA:	As per RFC 858
+
+	ECHO:	As per RFC 857
+
+	LOGOUT: As per RFC 727
+
+	STATUS:
+		The server will send its current status upon
+		request.  It does not ask for the clients status.
+		The client will request the servers current status
+		from the "send getstatus" command.
+
+	ENVIRON:
+		This option is currently being defined by the IETF
+		Telnet Working Group, and an RFC has not yet been
+		issued, but should be in the near future...
+
+	X-DISPLAY-LOCATION:
+		This functionality can be done through the ENVIRON
+		option, it is added here for completeness.
+
+	AUTHENTICATION:
+		This option is currently being defined by the IETF
+		Telnet Working Group, and an RFC has not yet been
+		issued.  The basic framework is pretty much decided,
+		but the definitions for the specific authentication
+		schemes is still in a state of flux.
+
+	ENCRYPTION:
+		This option is currently being defined by the IETF
+		Telnet Working Group, and an RFC has not yet been
+		issued.  The draft RFC is still in a state of flux,
+		so this code may change in the future.

usr.bin/telnet/authenc.c

@@ -0,0 +1,107 @@
+/*	$NetBSD: authenc.c,v 1.13 2012/01/09 16:08:55 christos Exp $	*/
+
+/*-
+ * 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 <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)authenc.c	8.1 (Berkeley) 6/6/93";
+#else
+__RCSID("$NetBSD: authenc.c,v 1.13 2012/01/09 16:08:55 christos Exp $");
+#endif
+#endif /* not lint */
+
+#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
+telnet_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(void)
+{
+#ifdef	ENCRYPTION
+	if (encrypt_output)
+		ring_encrypt(&netoring, encrypt_output);
+	else
+		ring_clearto(&netoring);
+#endif	/* ENCRYPTION */
+}
+
+int
+telnet_spin(void)
+{
+	return(-1);
+}
+
+char *
+telnet_getenv(char *val)
+{
+	return((char *)env_getvalue((unsigned char *)val));
+}
+
+char *
+telnet_gets(char *prmpt, char *result, int length, int echo)
+{
+	extern int globalmode;
+	int om = globalmode;
+	char *res;
+
+	TerminalNewMode(-1);
+	if (echo) {
+		printf("%s", prmpt);
+		res = fgets(result, length, stdin);
+	} else if ((res = getpass(prmpt)) != NULL) {
+		strlcpy(result, res, length);
+		res = result;
+	}
+	TerminalNewMode(om);
+	return(res);
+}
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION) */

usr.bin/telnet/defines.h

@@ -0,0 +1,59 @@
+/*	$NetBSD: defines.h,v 1.8 2003/08/07 11:16:09 agc Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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.
+ *
+ *	from: @(#)defines.h	8.1 (Berkeley) 6/6/93
+ */
+
+#define	settimer(x)	clocks.x = clocks.system++
+
+#ifndef TN3270
+
+#define	SetIn3270()
+
+#endif	/* !defined(TN3270) */
+
+#define	NETADD(c)	{ *netoring.supply = (c); ring_supplied(&netoring, 1); }
+#define	NET2ADD(c1,c2)	{ NETADD((c1)); NETADD((c2)); }
+#define	NETBYTES()	(ring_full_count(&netoring))
+#define	NETROOM()	(ring_empty_count(&netoring))
+
+#define	TTYADD(c)	if (!(SYNCHing||flushout)) { \
+				*ttyoring.supply = c; \
+				ring_supplied(&ttyoring, 1); \
+			}
+#define	TTYBYTES()	(ring_full_count(&ttyoring))
+#define	TTYROOM()	(ring_empty_count(&ttyoring))
+
+/*	Various modes */
+#define	MODE_LOCAL_CHARS(m)	((m)&(MODE_EDIT|MODE_TRAPSIG))
+#define	MODE_LOCAL_ECHO(m)	((m)&MODE_ECHO)
+#define	MODE_COMMAND_LINE(m)	((m)==-1)
+
+#define	CONTROL(x)	((x)&0x1f)		/* CTRL(x) is not portable */

usr.bin/telnet/externs.h

@@ -0,0 +1,413 @@
+/*	$NetBSD: externs.h,v 1.37 2012/01/10 23:39:11 joerg Exp $	*/
+
+/*
+ * 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.
+ *
+ *	from: @(#)externs.h	8.3 (Berkeley) 5/30/95
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <sys/termios.h>
+
+#include <string.h>
+
+#if defined(IPSEC)
+#include <netipsec/ipsec.h>
+#if defined(IPSEC_POLICY_IPSEC)
+extern char *ipsec_policy_in;
+extern char *ipsec_policy_out;
+#endif
+#endif
+
+#ifndef	_POSIX_VDISABLE
+# ifdef sun
+#  include <sys/param.h>	/* pick up VDISABLE definition, mayby */
+# endif
+# ifdef VDISABLE
+#  define _POSIX_VDISABLE VDISABLE
+# else
+#  define _POSIX_VDISABLE ((cc_t)'\377')
+# endif
+#endif
+
+#define	SUBBUFSIZE	256
+
+#include <sys/cdefs.h>
+
+extern int
+    autologin,		/* Autologin enabled */
+    skiprc,		/* Don't process the ~/.telnetrc file */
+    eight,		/* use eight bit mode (binary in and/or out */
+    family,		/* address family of peer */
+    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 */
+#ifdef TN3270
+    cursesdata,		/* Print out curses data flow */
+    apitrace,		/* Trace API transactions */
+#endif	/* defined(TN3270) */
+    termdata,		/* Print out terminal data flow */
+    telnet_debug,	/* Debug level */
+    doaddrlookup,	/* do a reverse address lookup? */
+    clienteof;		/* Client received EOF */
+
+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 symmetrical
+ */
+
+#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 char
+    NetTraceFile[];	/* Name of file where debugging output goes */
+
+extern jmp_buf
+    toplevel;		/* For error conditions. */
+
+
+/* authenc.c */
+int telnet_net_write(unsigned char *, int);
+void net_encrypt(void);
+int telnet_spin(void);
+char *telnet_getenv(char *);
+char *telnet_gets(char *, char *, int, int);
+
+/* commands.c */
+int send_tncmd(void (*)(int, int), const char *, char *);
+void _setlist_init(void);
+void set_escape_char(char *);
+int set_mode(int);
+int clear_mode(int);
+int modehelp(int);
+int suspend(int, char *[]);
+int shell(int, char *[]);
+int quit(int, char *[]);
+int logout(int, char *[]);
+int env_cmd(int, char *[]);
+struct env_lst *env_find(const unsigned char *);
+void env_init(void);
+struct env_lst *env_define(const unsigned char *, unsigned char *);
+struct env_lst *env_undefine(const unsigned char *, unsigned char *);
+struct env_lst *env_export(const unsigned char *, unsigned char *);
+struct env_lst *env_unexport(const unsigned char *, unsigned char *);
+struct env_lst *env_send(const unsigned char *, unsigned char *);
+struct env_lst *env_list(const unsigned char *, unsigned char *);
+unsigned char *env_default(int, int );
+unsigned char *env_getvalue(const unsigned char *);
+void env_varval(const unsigned char *);
+int auth_cmd(int, char *[]);
+int ayt_status(void);
+int encrypt_cmd(int, char *[]);
+int tn(int, char *[]);
+void command(int, const char *, int);
+void cmdrc(const char *, const char *);
+struct addrinfo;
+int sourceroute(struct addrinfo *, char *, char **, int *, int*);
+
+/* main.c */
+void tninit(void);
+void usage(void) __dead;
+
+/* network.c */
+void init_network(void);
+int stilloob(void);
+void setneturg(void);
+int netflush(void);
+
+/* sys_bsd.c */
+void init_sys(void);
+int TerminalWrite(char *, int);
+int TerminalRead(unsigned char *, int);
+int TerminalAutoFlush(void);
+int TerminalSpecialChars(int);
+void TerminalFlushOutput(void);
+void TerminalSaveState(void);
+cc_t *tcval(int);
+void TerminalDefaultChars(void);
+void TerminalRestoreState(void);
+void TerminalNewMode(int);
+void TerminalSpeeds(long *, long *);
+int TerminalWindowSize(long *, long *);
+int NetClose(int);
+void NetNonblockingIO(int, int);
+void NetSigIO(int, int);
+void NetSetPgrp(int);
+void sys_telnet_init(void);
+int process_rings(int , int , int , int , int , int);
+
+/* telnet.c */
+void init_telnet(void);
+void send_do(int, int );
+void send_dont(int, int );
+void send_will(int, int );
+void send_wont(int, int );
+void willoption(int);
+void wontoption(int);
+char **mklist(char *, char *);
+int is_unique(char *, char **, char **);
+int setup_term(char *, int, int *);
+char *gettermname(void);
+void lm_will(unsigned char *, int);
+void lm_wont(unsigned char *, int);
+void lm_do(unsigned char *, int);
+void lm_dont(unsigned char *, int);
+void lm_mode(unsigned char *, int, int );
+void slc_init(void);
+void slcstate(void);
+void slc_mode_export(int);
+void slc_mode_import(int);
+void slc_import(int);
+void slc_export(void);
+void slc(unsigned char *, int);
+void slc_check(void);
+void slc_start_reply(void);
+void slc_add_reply(unsigned int, unsigned int, cc_t);
+void slc_end_reply(void);
+int slc_update(void);
+void env_opt(unsigned char *, int);
+void env_opt_start(void);
+void env_opt_start_info(void);
+void env_opt_add(unsigned char *);
+int opt_welldefined(const char *);
+void env_opt_end(int);
+int telrcv(void);
+int rlogin_susp(void);
+int Scheduler(int);
+void telnet(const char *);
+void xmitAO(void);
+void xmitEL(void);
+void xmitEC(void);
+int dosynch(char *);
+int get_status(char *);
+void intp(void);
+void sendbrk(void);
+void sendabort(void);
+void sendsusp(void);
+void sendeof(void);
+void sendayt(void);
+void sendnaws(void);
+void tel_enter_binary(int);
+void tel_leave_binary(int);
+
+/* terminal.c */
+void init_terminal(void);
+int ttyflush(int);
+int getconnmode(void);
+void setconnmode(int);
+void setcommandmode(void);
+
+/* utilities.c */
+void upcase(char *);
+int SetSockOpt(int, int, int, int);
+void SetNetTrace(char *);
+void Dump(int, unsigned char *, int);
+void printoption(const char *, int, int );
+void optionstatus(void);
+void printsub(int, unsigned char *, int);
+void EmptyTerminal(void);
+void SetForExit(void);
+void Exit(int) __attribute__((__noreturn__));
+void ExitString(const char *, int) __attribute__((__noreturn__));
+
+
+extern struct	termios 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]
+
+#  define termSuspChar		new_tc.c_cc[VSUSP]
+#  define termFlushChar		new_tc.c_cc[VDISCARD]
+#  define termWerasChar		new_tc.c_cc[VWERASE]
+#  define termRprntChar		new_tc.c_cc[VREPRINT]
+#  define termLiteralNextChar	new_tc.c_cc[VLNEXT]
+#  define termStartChar		new_tc.c_cc[VSTART]
+#  define termStopChar		new_tc.c_cc[VSTOP]
+#  define termForw1Char		new_tc.c_cc[VEOL]
+#  define termForw2Char		new_tc.c_cc[VEOL]
+#  define termAytChar		new_tc.c_cc[VSTATUS]
+
+# 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
+
+
+/* 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[200],
+    *transcom;		/* Transparent command */
+
+/* tn3270.c */
+void init_3270(void);
+int DataToNetwork(char *, int, int);
+void inputAvailable(int);
+void outputPurge(void);
+int DataToTerminal(char *, int);
+int Push3270(void);
+void Finish3270(void);
+void StringToTerminal(char *);
+int _putchar(int);
+void SetIn3270(void);
+int tn3270_ttype(void);
+int settranscom(int, char *[]);
+int shell_continue(void);
+int DataFromTerminal(char *, int);
+int DataFromNetwork(char *, int, int);
+void ConnectScreen(void);
+int DoTerminalOutput(void);
+
+#endif	/* defined(TN3270) */

usr.bin/telnet/general.h

@@ -0,0 +1,43 @@
+/*	$NetBSD: general.h,v 1.6 2003/08/07 11:16:09 agc Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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.
+ *
+ *	from: @(#)general.h	8.1 (Berkeley) 6/6/93
+ */
+
+/*
+ * Some general definitions.
+ */
+
+
+#define	numberof(x)	(sizeof x/sizeof x[0])
+#define	highestof(x)	(numberof(x)-1)
+
+#define	ClearElement(x)		memset((char *)&x, 0, sizeof x)
+#define	ClearArray(x)		memset((char *)x, 0, sizeof x)

usr.bin/telnet/main.c

@@ -0,0 +1,361 @@
+/*	$NetBSD: main.c,v 1.29 2012/03/20 20:34:59 matt Exp $	*/
+
+/*
+ * 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 <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1988, 1990, 1993\
+ The Regents of the University of California.  All rights reserved.");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)main.c	8.3 (Berkeley) 5/30/95";
+#else
+__RCSID("$NetBSD: main.c,v 1.29 2012/03/20 20:34:59 matt Exp $");
+#endif
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <unistd.h>
+
+#include "ring.h"
+#include "externs.h"
+#include "defines.h"
+#ifdef AUTHENTICATION
+#include <libtelnet/auth.h>
+#endif
+#ifdef ENCRYPTION
+#include <libtelnet/encrypt.h>
+#endif
+
+/* These values need to be the same as defined in libtelnet/kerberos5.c */
+/* Either define them in both places, or put in some common header file. */
+#define OPTS_FORWARD_CREDS	0x00000002
+#define OPTS_FORWARDABLE_CREDS	0x00000001
+
+#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
+char *ipsec_policy_in = NULL;
+char *ipsec_policy_out = NULL;
+#endif
+
+int family = AF_UNSPEC;
+
+int main(int, char *[]);
+
+/*
+ * Initialize variables.
+ */
+void
+tninit(void)
+{
+    init_terminal();
+
+    init_network();
+
+    init_telnet();
+
+    init_sys();
+
+#ifdef TN3270
+    init_3270();
+#endif
+}
+
+	void
+usage(void)
+{
+	fprintf(stderr, "usage: %s %s%s%s%s\n",
+	    prompt,
+#ifdef	AUTHENTICATION
+	    "[-4] [-6] [-8] [-E] [-K] [-L] [-N] [-S tos] [-X atype] [-a] [-c]",
+	    "\n\t[-d] [-e char] [-k realm] [-l user] [-f/-F] [-n tracefile] ",
+#else
+	    "[-4] [-6] [-8] [-E] [-L] [-N] [-S tos] [-a] [-c] [-d] [-e char]",
+	    "\n\t[-l user] [-n tracefile] ",
+#endif
+#ifdef TN3270
+# ifdef AUTHENTICATION
+	    "[-noasynch] [-noasynctty]\n\t[-noasyncnet] [-r] [-t transcom] ",
+# else
+	    "[-noasynch] [-noasynctty] [-noasyncnet] [-r]\n\t[-t transcom]",
+# endif
+#else
+	    "[-r] ",
+#endif
+#ifdef	ENCRYPTION
+	    "[-x] "
+#endif
+#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
+	    "\n\t[-P policy] [host-name [port]]"
+#else
+	    "\n\t[host-name [port]]"
+#endif
+	);
+	exit(1);
+}
+
+/*
+ * main.  Parse arguments, invoke the protocol or command parser.
+ */
+
+
+int
+main(int argc, char *argv[])
+{
+	extern char *optarg;
+	extern int optind;
+	int ch;
+	char *user;
+#ifdef	FORWARD
+	extern int forward_flags;
+#endif	/* FORWARD */
+
+	tninit();		/* Clear out things */
+
+	TerminalSaveState();
+
+	if ((prompt = strrchr(argv[0], '/')) != NULL)
+		++prompt;
+	else
+		prompt = argv[0];
+
+	user = NULL;
+
+	rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
+	autologin = -1;
+
+#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
+#define IPSECOPT	"P:"
+#else
+#define IPSECOPT
+#endif
+	while ((ch = getopt(argc, argv, "468EKLNS:X:acde:fFk:l:n:rt:x"
+			IPSECOPT)) != -1) {
+#undef IPSECOPT
+		switch(ch) {
+		case '4':
+			family = AF_INET;
+			break;
+		case '6':
+			family = AF_INET6;
+			break;
+		case '8':
+			eight = 3;	/* binary output and input */
+			break;
+		case 'E':
+			rlogin = escape = _POSIX_VDISABLE;
+			break;
+		case 'K':
+#ifdef	AUTHENTICATION
+			autologin = 0;
+#endif
+			break;
+		case 'L':
+			eight |= 2;	/* binary output only */
+			break;
+		case 'N':
+			doaddrlookup = 0;
+			break;
+		case 'S':
+		    {
+			fprintf(stderr,
+			   "%s: Warning: -S ignored, no parsetos() support.\n",
+								prompt);
+		    }
+			break;
+		case 'X':
+#ifdef	AUTHENTICATION
+			auth_disable_name(optarg);
+#endif
+			break;
+		case 'a':
+			autologin = 1;
+			break;
+		case 'c':
+			skiprc = 1;
+			break;
+		case 'd':
+			telnet_debug = 1;
+			break;
+		case 'e':
+			set_escape_char(optarg);
+			break;
+		case 'f':
+#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
+			if (forward_flags & OPTS_FORWARD_CREDS) {
+			    fprintf(stderr,
+				    "%s: Only one of -f and -F allowed.\n",
+				    prompt);
+			    usage();
+			}
+			forward_flags |= OPTS_FORWARD_CREDS;
+#else
+			fprintf(stderr,
+			 "%s: Warning: -f ignored, no Kerberos V5 support.\n",
+				prompt);
+#endif
+			break;
+		case 'F':
+#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
+			if (forward_flags & OPTS_FORWARD_CREDS) {
+			    fprintf(stderr,
+				    "%s: Only one of -f and -F allowed.\n",
+				    prompt);
+			    usage();
+			}
+			forward_flags |= OPTS_FORWARD_CREDS;
+			forward_flags |= OPTS_FORWARDABLE_CREDS;
+#else
+			fprintf(stderr,
+			 "%s: Warning: -F ignored, no Kerberos V5 support.\n",
+				prompt);
+#endif
+			break;
+		case 'k':
+			fprintf(stderr,
+			   "%s: Warning: -k ignored, no Kerberos V4 support.\n",
+								prompt);
+			break;
+		case 'l':
+			if(autologin == 0) {
+				autologin = -1;
+			}
+			user = optarg;
+			break;
+		case 'n':
+#ifdef TN3270
+			/* distinguish between "-n oasynch" and "-noasynch" */
+			if (argv[optind - 1][0] == '-' && argv[optind - 1][1]
+			    == 'n' && argv[optind - 1][2] == 'o') {
+				if (!strcmp(optarg, "oasynch")) {
+					noasynchtty = 1;
+					noasynchnet = 1;
+				} else if (!strcmp(optarg, "oasynchtty"))
+					noasynchtty = 1;
+				else if (!strcmp(optarg, "oasynchnet"))
+					noasynchnet = 1;
+			} else
+#endif	/* defined(TN3270) */
+				SetNetTrace(optarg);
+			break;
+		case 'r':
+			rlogin = '~';
+			break;
+		case 't':
+#ifdef TN3270
+			(void)strlcpy(tline, optarg, sizeof(tline));
+			transcom = tline;
+#else
+			fprintf(stderr,
+			   "%s: Warning: -t ignored, no TN3270 support.\n",
+								prompt);
+#endif
+			break;
+		case 'x':
+#ifdef	ENCRYPTION
+			encrypt_auto(1);
+			decrypt_auto(1);
+#else	/* ENCRYPTION */
+			fprintf(stderr,
+			    "%s: Warning: -x ignored, no ENCRYPT support.\n",
+								prompt);
+#endif	/* ENCRYPTION */
+			break;
+#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
+		case 'P':
+			if (!strncmp("in", optarg, 2))
+				ipsec_policy_in = strdup(optarg);
+			else if (!strncmp("out", optarg, 3)) 
+				ipsec_policy_out = strdup(optarg);
+			else
+				usage();
+			break;
+#endif
+		case '?':
+		default:
+			usage();
+			/* NOTREACHED */
+		}
+	}
+
+	if (autologin == -1) {		/* esc@magic.fi; force  */
+#if defined(AUTHENTICATION)
+		autologin = 1;
+#endif
+#if defined(ENCRYPTION)
+		encrypt_auto(1);
+		decrypt_auto(1);
+#endif
+	}
+
+	if (autologin == -1)
+		autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc) {
+		static char ml[] = "-l";
+		char *args[7];
+		char ** volatile argp;	/* avoid longjmp clobbering */
+
+		argp = args;
+		if (argc > 2)
+			usage();
+		*argp++ = prompt;
+		if (user) {
+			*argp++ = ml;
+			*argp++ = user;
+		}
+		*argp++ = argv[0];		/* host */
+		if (argc > 1)
+			*argp++ = argv[1];	/* port */
+		*argp = 0;
+
+		if (setjmp(toplevel) != 0)
+			Exit(0);
+		if (tn(argp - args, args) == 1)
+			return (0);
+		else
+			return (1);
+	}
+	(void)setjmp(toplevel);
+	for (;;) {
+#ifdef TN3270
+		if (shell_active)
+			shell_continue();
+		else
+#endif
+			command(1, 0, 0);
+	}
+}

usr.bin/telnet/network.c

@@ -0,0 +1,179 @@
+/*	$NetBSD: network.c,v 1.17 2004/03/20 23:26:05 heas Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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 <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)network.c	8.2 (Berkeley) 12/15/93";
+#else
+__RCSID("$NetBSD: network.c,v 1.17 2004/03/20 23:26:05 heas Exp $");
+#endif
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+
+#include <errno.h>
+#include <unistd.h>
+#include <poll.h>
+
+#include <arpa/telnet.h>
+
+#include "ring.h"
+#include "defines.h"
+#include "externs.h"
+
+Ring		netoring, netiring;
+unsigned char	netobuf[2*BUFSIZ], netibuf[BUFSIZ];
+
+/*
+ * Initialize internal network data structures.
+ */
+
+void
+init_network(void)
+{
+    if (ring_init(&netoring, netobuf, sizeof netobuf) != 1) {
+	exit(1);
+    }
+    if (ring_init(&netiring, netibuf, sizeof netibuf) != 1) {
+	exit(1);
+    }
+    NetTrace = stdout;
+}
+
+
+/*
+ * Check to see if any out-of-band data exists on a socket (for
+ * Telnet "synch" processing).
+ */
+
+int
+stilloob(void)
+{
+    struct pollfd set[1];
+    int value;
+
+    set[0].fd = net;
+    set[0].events = POLLPRI;
+    do {
+	value = poll(set, 1, 0);
+    } while ((value == -1) && (errno == EINTR));
+
+    if (value < 0) {
+	perror("poll");
+	(void) quit(0, NULL);
+	/* NOTREACHED */
+    }
+    if (set[0].revents & POLLPRI) {
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+
+/*
+ *  setneturg()
+ *
+ *	Sets "neturg" to the current location.
+ */
+
+void
+setneturg(void)
+{
+    ring_mark(&netoring);
+}
+
+
+/*
+ *  netflush
+ *		Send as much data as possible to the network,
+ *	handling requests for urgent data.
+ *
+ *		The return value indicates whether we did any
+ *	useful work.
+ */
+
+
+int
+netflush(void)
+{
+    int n, n1;
+
+#ifdef	ENCRYPTION
+    if (encrypt_output)
+	ring_encrypt(&netoring, encrypt_output);
+#endif	/* ENCRYPTION */
+    if ((n1 = n = ring_full_consecutive(&netoring)) > 0) {
+	if (!ring_at_mark(&netoring)) {
+	    n = send(net, (char *)netoring.consume, n, 0); /* normal write */
+	} else {
+	    /*
+	     * In 4.2 (and 4.3) systems, there is some question about
+	     * what byte in a sendOOB operation is the "OOB" data.
+	     * To make ourselves compatible, we only send ONE byte
+	     * out of band, the one WE THINK should be OOB (though
+	     * we really have more the TCP philosophy of urgent data
+	     * rather than the Unix philosophy of OOB data).
+	     */
+	    n = send(net, (char *)netoring.consume, 1, MSG_OOB);/* URGENT data */
+	}
+    }
+    if (n < 0) {
+	if (errno != ENOBUFS && errno != EWOULDBLOCK) {
+	    setcommandmode();
+	    perror(hostname);
+	    (void)NetClose(net);
+	    ring_clear_mark(&netoring);
+	    ExitString("Connection closed by foreign host.\n", 1);
+	    /*NOTREACHED*/
+	}
+	n = 0;
+    }
+    if (netdata && n) {
+	Dump('>', netoring.consume, n);
+    }
+    if (n) {
+	ring_consumed(&netoring, n);
+	/*
+	 * If we sent all, and more to send, then recurse to pick
+	 * up the other half.
+	 */
+	if ((n1 == n) && ring_full_consecutive(&netoring)) {
+	    (void) netflush();
+	}
+	return 1;
+    } else {
+	return 0;
+    }
+}

usr.bin/telnet/ring.c

@@ -0,0 +1,339 @@
+/*	$NetBSD: ring.c,v 1.13 2003/08/07 11:16:10 agc Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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 <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)ring.c	8.2 (Berkeley) 5/30/95";
+#else
+__RCSID("$NetBSD: ring.c,v 1.13 2003/08/07 11:16:10 agc Exp $");
+#endif
+#endif /* not lint */
+
+/*
+ * This defines a structure for a ring buffer.
+ *
+ * The circular buffer has two parts:
+ *(((
+ *	full:	[consume, supply)
+ *	empty:	[supply, consume)
+ *]]]
+ *
+ */
+
+#include	<stdio.h>
+#include	<string.h>
+#include	<strings.h>
+#include	<errno.h>
+#include	<sys/types.h>
+#include	<sys/ioctl.h>
+#include	<sys/socket.h>
+
+#include	"ring.h"
+#include	"general.h"
+
+/* Internal macros */
+
+#if	!defined(MIN)
+#define	MIN(a,b)	(((a)<(b))? (a):(b))
+#endif	/* !defined(MIN) */
+
+#define	ring_subtract(d,a,b)	(((a)-(b) >= 0)? \
+					(a)-(b): (((a)-(b))+(d)->size))
+
+#define	ring_increment(d,a,c)	(((a)+(c) < (d)->top)? \
+					(a)+(c) : (((a)+(c))-(d)->size))
+
+#define	ring_decrement(d,a,c)	(((a)-(c) >= (d)->bottom)? \
+					(a)-(c) : (((a)-(c))-(d)->size))
+
+
+/*
+ * The following is a clock, used to determine full, empty, etc.
+ *
+ * There is some trickiness here.  Since the ring buffers are initialized
+ * to ZERO on allocation, we need to make sure, when interpreting the
+ * clock, that when the times are EQUAL, then the buffer is FULL.
+ */
+static u_long ring_clock = 0;
+
+
+#define	ring_empty(d) (((d)->consume == (d)->supply) && \
+				((d)->consumetime >= (d)->supplytime))
+#define	ring_full(d) (((d)->supply == (d)->consume) && \
+				((d)->supplytime > (d)->consumetime))
+
+
+
+
+
+/* Buffer state transition routines */
+
+int
+ring_init(Ring *ring, unsigned char *buffer, int count)
+{
+    memset((char *)ring, 0, sizeof *ring);
+
+    ring->size = count;
+
+    ring->supply = ring->consume = ring->bottom = buffer;
+
+    ring->top = ring->bottom+ring->size;
+
+#ifdef	ENCRYPTION
+    ring->clearto = 0;
+#endif	/* ENCRYPTION */
+
+    return 1;
+}
+
+/* Mark routines */
+
+/*
+ * Mark the most recently supplied byte.
+ */
+
+void
+ring_mark(Ring *ring)
+{
+    ring->mark = ring_decrement(ring, ring->supply, 1);
+}
+
+/*
+ * Is the ring pointing to the mark?
+ */
+
+int
+ring_at_mark(Ring *ring)
+{
+    if (ring->mark == ring->consume) {
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+/*
+ * Clear any mark set on the ring.
+ */
+
+void
+ring_clear_mark(Ring *ring)
+{
+    ring->mark = 0;
+}
+
+/*
+ * Add characters from current segment to ring buffer.
+ */
+void
+ring_supplied(Ring *ring, int count)
+{
+    ring->supply = ring_increment(ring, ring->supply, count);
+    ring->supplytime = ++ring_clock;
+}
+
+/*
+ * We have just consumed "c" bytes.
+ */
+void
+ring_consumed(Ring *ring, int count)
+{
+    if (count == 0)	/* don't update anything */
+	return;
+
+    if (ring->mark &&
+		(ring_subtract(ring, ring->mark, ring->consume) < count)) {
+	ring->mark = 0;
+    }
+#ifdef	ENCRYPTION
+    if (ring->consume < ring->clearto &&
+		ring->clearto <= ring->consume + count)
+	ring->clearto = 0;
+    else if (ring->consume + count > ring->top &&
+		ring->bottom <= ring->clearto &&
+		ring->bottom + ((ring->consume + count) - ring->top))
+	ring->clearto = 0;
+#endif	/* ENCRYPTION */
+    ring->consume = ring_increment(ring, ring->consume, count);
+    ring->consumetime = ++ring_clock;
+    /*
+     * Try to encourage "ring_empty_consecutive()" to be large.
+     */
+    if (ring_empty(ring)) {
+	ring->consume = ring->supply = ring->bottom;
+    }
+}
+
+
+
+/* Buffer state query routines */
+
+
+/* Number of bytes that may be supplied */
+int
+ring_empty_count(Ring *ring)
+{
+    if (ring_empty(ring)) {	/* if empty */
+	    return ring->size;
+    } else {
+	return ring_subtract(ring, ring->consume, ring->supply);
+    }
+}
+
+/* number of CONSECUTIVE bytes that may be supplied */
+int
+ring_empty_consecutive(Ring *ring)
+{
+    if ((ring->consume < ring->supply) || ring_empty(ring)) {
+			    /*
+			     * if consume is "below" supply, or empty, then
+			     * return distance to the top
+			     */
+	return ring_subtract(ring, ring->top, ring->supply);
+    } else {
+				    /*
+				     * else, return what we may.
+				     */
+	return ring_subtract(ring, ring->consume, ring->supply);
+    }
+}
+
+/* Return the number of bytes that are available for consuming
+ * (but don't give more than enough to get to cross over set mark)
+ */
+
+int
+ring_full_count(Ring *ring)
+{
+    if ((ring->mark == 0) || (ring->mark == ring->consume)) {
+	if (ring_full(ring)) {
+	    return ring->size;	/* nothing consumed, but full */
+	} else {
+	    return ring_subtract(ring, ring->supply, ring->consume);
+	}
+    } else {
+	return ring_subtract(ring, ring->mark, ring->consume);
+    }
+}
+
+/*
+ * Return the number of CONSECUTIVE bytes available for consuming.
+ * However, don't return more than enough to cross over set mark.
+ */
+int
+ring_full_consecutive(Ring *ring)
+{
+    if ((ring->mark == 0) || (ring->mark == ring->consume)) {
+	if ((ring->supply < ring->consume) || ring_full(ring)) {
+	    return ring_subtract(ring, ring->top, ring->consume);
+	} else {
+	    return ring_subtract(ring, ring->supply, ring->consume);
+	}
+    } else {
+	if (ring->mark < ring->consume) {
+	    return ring_subtract(ring, ring->top, ring->consume);
+	} else {	/* Else, distance to mark */
+	    return ring_subtract(ring, ring->mark, ring->consume);
+	}
+    }
+}
+
+/*
+ * Move data into the "supply" portion of of the ring buffer.
+ */
+void
+ring_supply_data(Ring *ring, unsigned char *buffer, int count)
+{
+    int i;
+
+    while (count) {
+	i = MIN(count, ring_empty_consecutive(ring));
+	memmove(ring->supply, buffer, i);
+	ring_supplied(ring, i);
+	count -= i;
+	buffer += i;
+    }
+}
+
+#ifdef notdef
+
+/*
+ * Move data from the "consume" portion of the ring buffer
+ */
+void
+ring_consume_data(Ring *ring, unsigned char *buffer, int count)
+{
+    int i;
+
+    while (count) {
+	i = MIN(count, ring_full_consecutive(ring));
+	memmove(buffer, ring->consume, i);
+	ring_consumed(ring, i);
+	count -= i;
+	buffer += i;
+    }
+}
+#endif
+
+#ifdef	ENCRYPTION
+void
+ring_encrypt(Ring *ring, void (*encryptor)(unsigned char *, int))
+{
+	unsigned char *s, *c;
+
+	if (ring_empty(ring) || ring->clearto == ring->supply)
+		return;
+
+	if (!(c = ring->clearto))
+		c = ring->consume;
+
+	s = ring->supply;
+
+	if (s <= c) {
+		(*encryptor)(c, ring->top - c);
+		(*encryptor)(ring->bottom, s - ring->bottom);
+	} else
+		(*encryptor)(c, s - c);
+
+	ring->clearto = ring->supply;
+}
+
+void
+ring_clearto(Ring *ring)
+{
+
+	if (!ring_empty(ring))
+		ring->clearto = ring->supply;
+	else
+		ring->clearto = 0;
+}
+#endif	/* ENCRYPTION */

usr.bin/telnet/ring.h

@@ -0,0 +1,104 @@
+/*	$NetBSD: ring.h,v 1.10 2003/08/07 11:16:10 agc Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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.
+ *
+ *	from: @(#)ring.h	8.1 (Berkeley) 6/6/93
+ */
+
+#include <sys/cdefs.h>
+
+/*
+ * This defines a structure for a ring buffer.
+ *
+ * The circular buffer has two parts:
+ *(((
+ *	full:	[consume, supply)
+ *	empty:	[supply, consume)
+ *]]]
+ *
+ */
+typedef struct {
+    unsigned char	*consume,	/* where data comes out of */
+			*supply,	/* where data comes in to */
+			*bottom,	/* lowest address in buffer */
+			*top,		/* highest address+1 in buffer */
+			*mark;		/* marker (user defined) */
+#ifdef	ENCRYPTION
+    unsigned char	*clearto;	/* Data to this point is clear text */
+    unsigned char	*encryyptedto;	/* Data is encrypted to here */
+#endif	/* ENCRYPTION */
+    int		size;		/* size in bytes of buffer */
+    u_long	consumetime,	/* help us keep straight full, empty, etc. */
+		supplytime;
+} Ring;
+
+/* Ring buffer structures which are shared */
+
+extern Ring
+    netoring,
+    netiring,
+    ttyoring,
+    ttyiring;
+
+/* Here are some functions and macros to deal with the ring buffer */
+
+/* Initialization routine */
+extern int
+	ring_init(Ring *ring, unsigned char *buffer, int count);
+
+/* Data movement routines */
+extern void
+	ring_supply_data(Ring *ring, unsigned char *buffer, int count);
+#ifdef notdef
+extern void
+	ring_consume_data(Ring *ring, unsigned char *buffer, int count);
+#endif
+
+/* Buffer state transition routines */
+extern void
+	ring_supplied(Ring *ring, int count),
+	ring_consumed(Ring *ring, int count);
+
+/* Buffer state query routines */
+extern int
+	ring_empty_count(Ring *ring),
+	ring_empty_consecutive(Ring *ring),
+	ring_full_count(Ring *ring),
+	ring_full_consecutive(Ring *ring),
+	ring_at_mark(Ring *ring);
+
+#ifdef	ENCRYPTION
+extern void
+	ring_encrypt(Ring *ring, void (*func)(unsigned char *, int)),
+	ring_clearto(Ring *ring);
+#endif	/* ENCRYPTION */
+
+extern void
+	ring_clear_mark(Ring *ring),
+	ring_mark(Ring *ring);

usr.bin/telnet/sys_bsd.c

@@ -0,0 +1,739 @@
+/*	$NetBSD: sys_bsd.c,v 1.33 2012/01/09 16:08:55 christos Exp $	*/
+
+/*
+ * 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 <sys/cdefs.h>
+#ifndef lint
+#if 0
+from: static char sccsid[] = "@(#)sys_bsd.c	8.4 (Berkeley) 5/30/95";
+#else
+__RCSID("$NetBSD: sys_bsd.c,v 1.33 2012/01/09 16:08:55 christos Exp $");
+#endif
+#endif /* not lint */
+
+/*
+ * The following routines try to encapsulate what is system dependent
+ * (at least between 4.x and dos) which is used in telnet.c.
+ */
+
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <poll.h>
+#include <arpa/telnet.h>
+
+#include "ring.h"
+#include "defines.h"
+#include "externs.h"
+#include "types.h"
+
+#define	SIG_FUNC_RET	void
+
+SIG_FUNC_RET susp(int);
+SIG_FUNC_RET ayt(int);
+
+SIG_FUNC_RET intr(int);
+SIG_FUNC_RET intr2(int);
+SIG_FUNC_RET sendwin(int);
+
+
+int
+	tout,			/* Output file descriptor */
+	tin,			/* Input file descriptor */
+	net;
+
+struct	termios old_tc = { .c_iflag = 0 };
+extern struct termios new_tc;
+
+# ifndef	TCSANOW
+#  ifdef TCSETS
+#   define	TCSANOW		TCSETS
+#   define	TCSADRAIN	TCSETSW
+#   define	tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
+#  else
+#   ifdef TCSETA
+#    define	TCSANOW		TCSETA
+#    define	TCSADRAIN	TCSETAW
+#    define	tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
+#   else
+#    define	TCSANOW		TIOCSETA
+#    define	TCSADRAIN	TIOCSETAW
+#    define	tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
+#   endif
+#  endif
+#  define	tcsetattr(f, a, t) ioctl(f, a, (char *)t)
+#  define	cfgetospeed(ptr)	((ptr)->c_cflag&CBAUD)
+#  ifdef CIBAUD
+#   define	cfgetispeed(ptr)	(((ptr)->c_cflag&CIBAUD) >> IBSHIFT)
+#  else
+#   define	cfgetispeed(ptr)	cfgetospeed(ptr)
+#  endif
+# endif /* TCSANOW */
+
+
+void
+init_sys(void)
+{
+    tout = fileno(stdout);
+    tin = fileno(stdin);
+
+    errno = 0;
+}
+
+
+int
+TerminalWrite(char *buf, int  n)
+{
+    return write(tout, buf, n);
+}
+
+int
+TerminalRead(unsigned char *buf, int  n)
+{
+    return read(tin, buf, n);
+}
+
+/*
+ *
+ */
+
+int
+TerminalAutoFlush(void)
+{
+    return 1;
+}
+
+#ifdef	KLUDGELINEMODE
+extern int kludgelinemode;
+#endif
+/*
+ * TerminalSpecialChars()
+ *
+ * Look at an input character to see if it is a special character
+ * and decide what to do.
+ *
+ * Output:
+ *
+ *	0	Don't add this character.
+ *	1	Do add this character
+ */
+
+int
+TerminalSpecialChars(int c)
+{
+    if (c == termIntChar) {
+	intp();
+	return 0;
+    } else if (c == termQuitChar) {
+#ifdef	KLUDGELINEMODE
+	if (kludgelinemode)
+	    sendbrk();
+	else
+#endif
+	    sendabort();
+	return 0;
+    } else if (c == termEofChar) {
+	if (my_want_state_is_will(TELOPT_LINEMODE)) {
+	    sendeof();
+	    return 0;
+	}
+	return 1;
+    } else if (c == termSuspChar) {
+	sendsusp();
+	return(0);
+    } else if (c == termFlushChar) {
+	xmitAO();		/* Transmit Abort Output */
+	return 0;
+    } else if (!MODE_LOCAL_CHARS(globalmode)) {
+	if (c == termKillChar) {
+	    xmitEL();
+	    return 0;
+	} else if (c == termEraseChar) {
+	    xmitEC();		/* Transmit Erase Character */
+	    return 0;
+	}
+    }
+    return 1;
+}
+
+
+/*
+ * Flush output to the terminal
+ */
+
+void
+TerminalFlushOutput(void)
+{
+    int com = 0;
+    (void) ioctl(fileno(stdout), TIOCFLUSH, &com);
+}
+
+void
+TerminalSaveState(void)
+{
+    tcgetattr(0, &old_tc);
+
+    new_tc = old_tc;
+}
+
+cc_t *
+tcval(int func)
+{
+    switch(func) {
+    case SLC_IP:	return(&termIntChar);
+    case SLC_ABORT:	return(&termQuitChar);
+    case SLC_EOF:	return(&termEofChar);
+    case SLC_EC:	return(&termEraseChar);
+    case SLC_EL:	return(&termKillChar);
+    case SLC_XON:	return(&termStartChar);
+    case SLC_XOFF:	return(&termStopChar);
+    case SLC_FORW1:	return(&termForw1Char);
+    case SLC_FORW2:	return(&termForw2Char);
+    case SLC_AO:	return(&termFlushChar);
+    case SLC_SUSP:	return(&termSuspChar);
+    case SLC_EW:	return(&termWerasChar);
+    case SLC_RP:	return(&termRprntChar);
+    case SLC_LNEXT:	return(&termLiteralNextChar);
+    case SLC_AYT:	return(&termAytChar);
+
+    case SLC_SYNCH:
+    case SLC_BRK:
+    case SLC_EOR:
+    default:
+	return((cc_t *)0);
+    }
+}
+
+void
+TerminalDefaultChars(void)
+{
+    memmove(new_tc.c_cc, old_tc.c_cc, sizeof(old_tc.c_cc));
+}
+
+#ifdef notdef
+void
+TerminalRestoreState(void)
+{
+}
+#endif
+
+/*
+ * TerminalNewMode - set up terminal to a specific mode.
+ *	MODE_ECHO: do local terminal echo
+ *	MODE_FLOW: do local flow control
+ *	MODE_TRAPSIG: do local mapping to TELNET IAC sequences
+ *	MODE_EDIT: do local line editing
+ *
+ *	Command mode:
+ *		MODE_ECHO|MODE_EDIT|MODE_FLOW|MODE_TRAPSIG
+ *		local echo
+ *		local editing
+ *		local xon/xoff
+ *		local signal mapping
+ *
+ *	Linemode:
+ *		local/no editing
+ *	Both Linemode and Single Character mode:
+ *		local/remote echo
+ *		local/no xon/xoff
+ *		local/no signal mapping
+ */
+
+
+void
+TerminalNewMode(int f)
+{
+    static int prevmode = 0;
+    struct termios tmp_tc;
+    int onoff;
+    int old;
+    cc_t esc;
+
+    globalmode = f&~MODE_FORCE;
+    if (prevmode == f)
+	return;
+
+    /*
+     * Write any outstanding data before switching modes
+     * ttyflush() returns 0 only when there is no more data
+     * left to write out, it returns -1 if it couldn't do
+     * anything at all, otherwise it returns 1 + the number
+     * of characters left to write.
+#ifndef	USE_TERMIO
+     * We would really like to ask the kernel to wait for the output
+     * to drain, like we can do with the TCSADRAIN, but we don't have
+     * that option.  The only ioctl that waits for the output to
+     * drain, TIOCSETP, also flushes the input queue, which is NOT
+     * what we want (TIOCSETP is like TCSADFLUSH).
+#endif
+     */
+    old = ttyflush(SYNCHing|flushout);
+    if (old < 0 || old > 1) {
+	tcgetattr(tin, &tmp_tc);
+	do {
+	    /*
+	     * Wait for data to drain, then flush again.
+	     */
+	    tcsetattr(tin, TCSADRAIN, &tmp_tc);
+	    old = ttyflush(SYNCHing|flushout);
+	} while (old < 0 || old > 1);
+    }
+
+    old = prevmode;
+    prevmode = f&~MODE_FORCE;
+    tmp_tc = new_tc;
+
+    if (f&MODE_ECHO) {
+	tmp_tc.c_lflag |= ECHO;
+	tmp_tc.c_oflag |= ONLCR;
+	if (crlf)
+		tmp_tc.c_iflag |= ICRNL;
+    } else {
+	tmp_tc.c_lflag &= ~ECHO;
+	tmp_tc.c_oflag &= ~ONLCR;
+# ifdef notdef
+	if (crlf)
+		tmp_tc.c_iflag &= ~ICRNL;
+# endif
+    }
+
+    if ((f&MODE_FLOW) == 0) {
+	tmp_tc.c_iflag &= ~(IXOFF|IXON);	/* Leave the IXANY bit alone */
+    } else {
+	if (restartany < 0) {
+		tmp_tc.c_iflag |= IXOFF|IXON;	/* Leave the IXANY bit alone */
+	} else if (restartany > 0) {
+		tmp_tc.c_iflag |= IXOFF|IXON|IXANY;
+	} else {
+		tmp_tc.c_iflag |= IXOFF|IXON;
+		tmp_tc.c_iflag &= ~IXANY;
+	}
+    }
+
+    if ((f&MODE_TRAPSIG) == 0) {
+	tmp_tc.c_lflag &= ~ISIG;
+	localchars = 0;
+    } else {
+	tmp_tc.c_lflag |= ISIG;
+	localchars = 1;
+    }
+
+    if (f&MODE_EDIT) {
+	tmp_tc.c_lflag |= ICANON;
+    } else {
+	tmp_tc.c_lflag &= ~ICANON;
+	tmp_tc.c_iflag &= ~ICRNL;
+	tmp_tc.c_cc[VMIN] = 1;
+	tmp_tc.c_cc[VTIME] = 0;
+    }
+
+    if ((f&(MODE_EDIT|MODE_TRAPSIG)) == 0) {
+	tmp_tc.c_lflag &= ~IEXTEN;
+    }
+
+    if (f&MODE_SOFT_TAB) {
+# ifdef	OXTABS
+	tmp_tc.c_oflag |= OXTABS;
+# endif
+# ifdef	TABDLY
+	tmp_tc.c_oflag &= ~TABDLY;
+	tmp_tc.c_oflag |= TAB3;
+# endif
+    } else {
+# ifdef	OXTABS
+	tmp_tc.c_oflag &= ~OXTABS;
+# endif
+# ifdef	TABDLY
+	tmp_tc.c_oflag &= ~TABDLY;
+# endif
+    }
+
+    if (f&MODE_LIT_ECHO) {
+# ifdef	ECHOCTL
+	tmp_tc.c_lflag &= ~ECHOCTL;
+# endif
+    } else {
+# ifdef	ECHOCTL
+	tmp_tc.c_lflag |= ECHOCTL;
+# endif
+    }
+
+    if (f == -1) {
+	onoff = 0;
+    } else {
+	if (f & MODE_INBIN)
+		tmp_tc.c_iflag &= ~ISTRIP;
+	else
+		tmp_tc.c_iflag |= ISTRIP;
+	if (f & MODE_OUTBIN) {
+		tmp_tc.c_cflag &= ~(CSIZE|PARENB);
+		tmp_tc.c_cflag |= CS8;
+		tmp_tc.c_oflag &= ~OPOST;
+	} else {
+		tmp_tc.c_cflag &= ~(CSIZE|PARENB);
+		tmp_tc.c_cflag |= old_tc.c_cflag & (CSIZE|PARENB);
+		tmp_tc.c_oflag |= OPOST;
+	}
+	onoff = 1;
+    }
+
+    if (f != -1) {
+	(void) signal(SIGTSTP, susp);
+	(void) signal(SIGINFO, ayt);
+#if	defined(USE_TERMIO) && defined(NOKERNINFO)
+	tmp_tc.c_lflag |= NOKERNINFO;
+#endif
+	/*
+	 * We don't want to process ^Y here.  It's just another
+	 * character that we'll pass on to the back end.  It has
+	 * to process it because it will be processed when the
+	 * user attempts to read it, not when we send it.
+	 */
+# ifdef	VDSUSP
+	tmp_tc.c_cc[VDSUSP] = (cc_t)(_POSIX_VDISABLE);
+# endif
+	/*
+	 * If the VEOL character is already set, then use VEOL2,
+	 * otherwise use VEOL.
+	 */
+	esc = (rlogin != _POSIX_VDISABLE) ? rlogin : escape;
+	if ((tmp_tc.c_cc[VEOL] != esc)
+# ifdef	VEOL2
+	    && (tmp_tc.c_cc[VEOL2] != esc)
+# endif
+	    ) {
+		if (tmp_tc.c_cc[VEOL] == (cc_t)(_POSIX_VDISABLE))
+		    tmp_tc.c_cc[VEOL] = esc;
+# ifdef	VEOL2
+		else if (tmp_tc.c_cc[VEOL2] == (cc_t)(_POSIX_VDISABLE))
+		    tmp_tc.c_cc[VEOL2] = esc;
+# endif
+	}
+    } else {
+	(void) signal(SIGINFO, (void (*)(int)) ayt_status);
+	(void) signal(SIGTSTP, SIG_DFL);
+	(void) sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1)));
+	tmp_tc = old_tc;
+    }
+    if (tcsetattr(tin, TCSADRAIN, &tmp_tc) < 0)
+	tcsetattr(tin, TCSANOW, &tmp_tc);
+
+    ioctl(tin, FIONBIO, (char *)&onoff);
+    ioctl(tout, FIONBIO, (char *)&onoff);
+#if	defined(TN3270)
+    if (noasynchtty == 0) {
+	ioctl(tin, FIOASYNC, (char *)&onoff);
+    }
+#endif	/* defined(TN3270) */
+
+}
+
+void
+TerminalSpeeds(long *ispeed, long *ospeed)
+{
+    long in, out;
+
+    out = cfgetospeed(&old_tc);
+    in = cfgetispeed(&old_tc);
+    if (in == 0)
+	in = out;
+
+	*ispeed = in;
+	*ospeed = out;
+}
+
+int
+TerminalWindowSize(long *rows, long *cols)
+{
+    struct winsize ws;
+
+    if (ioctl(fileno(stdin), TIOCGWINSZ, (char *)&ws) >= 0) {
+	*rows = ws.ws_row;
+	*cols = ws.ws_col;
+	return 1;
+    }
+    return 0;
+}
+
+int
+NetClose(int fd)
+{
+    return close(fd);
+}
+
+
+void
+NetNonblockingIO(int fd, int onoff)
+{
+    ioctl(fd, FIONBIO, (char *)&onoff);
+}
+
+#ifdef TN3270
+void
+NetSigIO(int fd, int onoff)
+{
+    ioctl(fd, FIOASYNC, (char *)&onoff);	/* hear about input */
+}
+
+void
+NetSetPgrp(int fd)
+{
+    int myPid;
+
+    myPid = getpid();
+    fcntl(fd, F_SETOWN, myPid);
+}
+#endif	/*defined(TN3270)*/
+
+/*
+ * Various signal handling routines.
+ */
+
+/* ARGSUSED */
+SIG_FUNC_RET
+intr(int sig)
+{
+    if (localchars) {
+	intp();
+	return;
+    }
+    setcommandmode();
+    longjmp(toplevel, -1);
+}
+
+/* ARGSUSED */
+SIG_FUNC_RET
+intr2(int sig)
+{
+    if (localchars) {
+#ifdef	KLUDGELINEMODE
+	if (kludgelinemode)
+	    sendbrk();
+	else
+#endif
+	    sendabort();
+	return;
+    }
+}
+
+/* ARGSUSED */
+SIG_FUNC_RET
+susp(int sig)
+{
+    if ((rlogin != _POSIX_VDISABLE) && rlogin_susp())
+	return;
+    if (localchars)
+	sendsusp();
+}
+
+/* ARGSUSED */
+SIG_FUNC_RET
+sendwin(int sig)
+{
+    if (connected) {
+	sendnaws();
+    }
+}
+
+/* ARGSUSED */
+SIG_FUNC_RET
+ayt(int sig)
+{
+    if (connected)
+	sendayt();
+    else
+	ayt_status();
+}
+
+
+void
+sys_telnet_init(void)
+{
+    (void) signal(SIGINT, intr);
+    (void) signal(SIGQUIT, intr2);
+    (void) signal(SIGPIPE, SIG_IGN);
+    (void) signal(SIGWINCH, sendwin);
+    (void) signal(SIGTSTP, susp);
+    (void) signal(SIGINFO, ayt);
+
+    setconnmode(0);
+
+    NetNonblockingIO(net, 1);
+
+#ifdef TN3270
+    if (noasynchnet == 0) {			/* DBX can't handle! */
+	NetSigIO(net, 1);
+	NetSetPgrp(net);
+    }
+#endif	/* defined(TN3270) */
+
+    if (SetSockOpt(net, SOL_SOCKET, SO_OOBINLINE, 1) == -1) {
+	perror("SetSockOpt");
+    }
+}
+
+/*
+ * Process rings -
+ *
+ *	This routine tries to fill up/empty our various rings.
+ *
+ *	The parameter specifies whether this is a poll operation,
+ *	or a block-until-something-happens operation.
+ *
+ *	The return value is 1 if something happened, 0 if not, < 0 if an
+ *	error occurred.
+ */
+
+int
+process_rings(int netin, int netout, int netex, int ttyin, int ttyout,
+    int dopoll)		/* If 0, then block until something to do */
+{
+    struct pollfd set[3];
+    int c;
+		/* One wants to be a bit careful about setting returnValue
+		 * to one, since a one implies we did some useful work,
+		 * and therefore probably won't be called to block next
+		 * time (TN3270 mode only).
+		 */
+    int returnValue = 0;
+
+    set[0].fd = net;
+    set[0].events = (netout ? POLLOUT : 0) | (netin ? POLLIN : 0) |
+	(netex ? POLLPRI : 0);
+    set[1].fd = tout;
+    set[1].events = ttyout ? POLLOUT : 0;
+    set[2].fd = tin;
+    set[2].events = ttyin ? POLLIN : 0;
+
+    if ((c = poll(set, 3, dopoll ? 0 : INFTIM)) < 0) {
+	if (c == -1) {
+		    /*
+		     * we can get EINTR if we are in line mode,
+		     * and the user does an escape (TSTP), or
+		     * some other signal generator.
+		     */
+	    if (errno == EINTR) {
+		return 0;
+	    }
+#ifdef TN3270
+		    /*
+		     * we can get EBADF if we were in transparent
+		     * mode, and the transcom process died.
+		    */
+	    if (errno == EBADF)
+		return 0;
+#endif /* defined(TN3270) */
+		    /* I don't like this, does it ever happen? */
+	    printf("sleep(5) from telnet, after poll\r\n");
+	    sleep(5);
+	}
+	return 0;
+    }
+
+    /*
+     * Any urgent data?
+     */
+    if (set[0].revents & POLLPRI) {
+	SYNCHing = 1;
+	(void) ttyflush(1);	/* flush already enqueued data */
+    }
+
+    /*
+     * Something to read from the network...
+     */
+    if (set[0].revents & POLLIN) {
+	int canread;
+
+	canread = ring_empty_consecutive(&netiring);
+	c = recv(net, (char *)netiring.supply, canread, 0);
+	if (c < 0 && errno == EWOULDBLOCK) {
+	    c = 0;
+	} else if (c <= 0) {
+	    return -1;
+	}
+	if (netdata) {
+	    Dump('<', netiring.supply, c);
+	}
+	if (c)
+	    ring_supplied(&netiring, c);
+	returnValue = 1;
+    }
+
+    /*
+     * Something to read from the tty...
+     */
+    if (set[2].revents & POLLIN) {
+	c = TerminalRead(ttyiring.supply, ring_empty_consecutive(&ttyiring));
+	if (c < 0 && errno == EIO)
+	    c = 0;
+	if (c < 0 && errno == EWOULDBLOCK) {
+	    c = 0;
+	} else {
+	    if (c < 0) {
+		return -1;
+	    }
+	    if (c == 0) {
+		/* must be an EOF... */
+		if (MODE_LOCAL_CHARS(globalmode) && isatty(tin)) {
+		    *ttyiring.supply = termEofChar;
+		    c = 1;
+		} else {
+		    clienteof = 1;
+		    shutdown(net, 1);
+		    return 0;
+		}
+	    }
+	    if (termdata) {
+		Dump('<', ttyiring.supply, c);
+	    }
+	    ring_supplied(&ttyiring, c);
+	}
+	returnValue = 1;		/* did something useful */
+    }
+
+    if (set[0].revents & POLLOUT) {
+	returnValue |= netflush();
+    }
+
+    if (set[1].revents & (POLLHUP|POLLNVAL))
+	return(-1);
+
+    if (set[1].revents & POLLOUT) {
+	returnValue |= (ttyflush(SYNCHing|flushout) > 0);
+    }
+
+    return returnValue;
+}

usr.bin/telnet/terminal.c

@@ -0,0 +1,220 @@
+/*	$NetBSD: terminal.c,v 1.15 2005/02/19 23:28:41 christos Exp $	*/
+
+/*
+ * 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 <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)terminal.c	8.2 (Berkeley) 2/16/95";
+#else
+__RCSID("$NetBSD: terminal.c,v 1.15 2005/02/19 23:28:41 christos Exp $");
+#endif
+#endif /* not lint */
+
+#include <arpa/telnet.h>
+#include <sys/types.h>
+
+#include "ring.h"
+
+#include "externs.h"
+#include "types.h"
+
+#ifdef ENCRYPTION
+#include <libtelnet/encrypt.h>
+#endif
+
+Ring		ttyoring, ttyiring;
+unsigned char	ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
+char line[] = { '\0' };
+
+int termdata;			/* Debugging flag */
+
+/*
+ * initialize the terminal data structures.
+ */
+
+void
+init_terminal(void)
+{
+    if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
+	exit(1);
+    }
+    if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
+	exit(1);
+    }
+    autoflush = TerminalAutoFlush();
+}
+
+
+/*
+ *		Send as much data as possible to the terminal, else exits if
+ *		it encounters a permanent failure when writing to the tty.
+ *
+ *		Return value:
+ *			-1: No useful work done, data waiting to go out.
+ *			 0: No data was waiting, so nothing was done.
+ *			 1: All waiting data was written out.
+ *			 n: All data - n was written out.
+ */
+
+
+int
+ttyflush(int drop)
+{
+    int n, n0, n1;
+
+    n0 = ring_full_count(&ttyoring);
+    if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
+	if (drop) {
+	    TerminalFlushOutput();
+	    /* we leave 'n' alone! */
+	} else {
+	    n = TerminalWrite(ttyoring.consume, n);
+	}
+    }
+    if (n > 0) {
+	if (termdata && n) {
+	    Dump('>', ttyoring.consume, n);
+	}
+	/*
+	 * If we wrote everything, and the full count is
+	 * larger than what we wrote, then write the
+	 * rest of the buffer.
+	 */
+	if (n1 == n && n0 > n) {
+		n1 = n0 - n;
+		if (!drop)
+			n1 = TerminalWrite(ttyoring.bottom, n1);
+		if (n1 > 0)
+			n += n1;
+	}
+	ring_consumed(&ttyoring, n);
+    }
+    if (n < 0) {
+	if (errno == EAGAIN || errno == EINTR) {
+	    return -1;
+	} else {
+	    ring_consumed(&ttyoring, ring_full_count(&ttyoring));
+	    setconnmode(0);
+	    setcommandmode();
+	    NetClose(net);
+	    fprintf(stderr, "Connection closed by foreign host.\n");
+	    exit(1);
+	}
+    }
+    if (n == n0) {
+	if (n0)
+	    return -1;
+	return 0;
+    }
+    return n0 - n + 1;
+}
+
+
+/*
+ * These routines decides on what the mode should be (based on the values
+ * of various global variables).
+ */
+
+
+int
+getconnmode(void)
+{
+    extern int linemode;
+    int mode = 0;
+#ifdef	KLUDGELINEMODE
+    extern int kludgelinemode;
+#endif
+
+    if (In3270)
+	return(MODE_FLOW);
+
+    if (my_want_state_is_dont(TELOPT_ECHO))
+	mode |= MODE_ECHO;
+
+    if (localflow)
+	mode |= MODE_FLOW;
+
+    if (my_want_state_is_will(TELOPT_BINARY))
+	mode |= MODE_INBIN;
+
+    if (his_want_state_is_will(TELOPT_BINARY))
+	mode |= MODE_OUTBIN;
+
+#ifdef	KLUDGELINEMODE
+    if (kludgelinemode) {
+	if (my_want_state_is_dont(TELOPT_SGA)) {
+	    mode |= (MODE_TRAPSIG|MODE_EDIT);
+	    if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
+		mode &= ~MODE_ECHO;
+	    }
+	}
+	return(mode);
+    }
+#endif
+    if (my_want_state_is_will(TELOPT_LINEMODE))
+	mode |= linemode;
+    return(mode);
+}
+
+void
+setconnmode(int force)
+{
+#ifdef	ENCRYPTION
+    static int enc_passwd = 0;
+#endif
+    int newmode;
+
+    newmode = getconnmode()|(force?MODE_FORCE:0);
+
+    TerminalNewMode(newmode);
+
+#ifdef	ENCRYPTION
+    if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
+	if (my_want_state_is_will(TELOPT_ENCRYPT)
+				&& (enc_passwd == 0) && !encrypt_output) {
+	    encrypt_request_start(0, 0);
+	    enc_passwd = 1;
+	}
+    } else {
+	if (enc_passwd) {
+	    encrypt_request_end();
+	    enc_passwd = 0;
+	}
+    }
+#endif	/* ENCRYPTION */
+}
+
+
+void
+setcommandmode(void)
+{
+    TerminalNewMode(-1);
+}

usr.bin/telnet/tn3270.c

@@ -0,0 +1,394 @@
+/*	$NetBSD: tn3270.c,v 1.22 2006/10/07 17:27:57 elad Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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 <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)tn3270.c	8.2 (Berkeley) 5/30/95";
+#else
+__RCSID("$NetBSD: tn3270.c,v 1.22 2006/10/07 17:27:57 elad Exp $");
+#endif
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <arpa/telnet.h>
+#include <unistd.h>
+#include <poll.h>
+
+#include "general.h"
+#include "defines.h"
+#include "ring.h"
+#include "externs.h"
+
+#ifdef TN3270
+
+#include "../ctlr/screen.h"
+#include "../ctlr/declare.h"
+
+#include "../ascii/state.h"
+
+#include "../general/globals.h"
+
+#include "../sys_curses/telextrn.h"
+
+int
+	HaveInput,		/* There is input available to scan */
+	cursesdata,		/* Do we dump curses data? */
+	sigiocount;		/* Number of times we got a SIGIO */
+
+char	tline[200];
+char	*transcom = 0;	/* transparent mode command (default: none) */
+
+char	Ibuf[8*BUFSIZ], *Ifrontp, *Ibackp;
+
+static char	sb_terminal[] = { IAC, SB,
+			TELOPT_TTYPE, TELQUAL_IS,
+			'I', 'B', 'M', '-', '3', '2', '7', '8', '-', '2',
+			IAC, SE };
+#define	SBTERMMODEL	13
+
+static int
+	Sent3270TerminalType;	/* Have we said we are a 3270? */
+
+#endif	/* defined(TN3270) */
+
+
+#ifdef TN3270
+void
+init_3270(void)
+{
+    HaveInput = 0;
+    sigiocount = 0;
+    Sent3270TerminalType = 0;
+    Ifrontp = Ibackp = Ibuf;
+    init_ctlr();		/* Initialize some things */
+    init_keyboard();
+    init_screen();
+    init_system();
+}
+#endif	/* defined(TN3270) */
+
+
+#ifdef TN3270
+
+/*
+ * DataToNetwork - queue up some data to go to network.  If "done" is set,
+ * then when last byte is queued, we add on an IAC EOR sequence (so,
+ * don't call us with "done" until you want that done...)
+ *
+ * We actually do send all the data to the network buffer, since our
+ * only client needs for us to do that.
+ */
+
+int
+DataToNetwork(char *buffer,	/* where the data is */
+    int  count,	/* how much to send */
+    int		  done)		/* is this the last of a logical block */
+{
+    int loop, c;
+    int origCount;
+
+    origCount = count;
+
+    while (count) {
+	/* If not enough room for EORs, IACs, etc., wait */
+	if (NETROOM() < 6) {
+	    struct pollfd set[1];
+
+	    set[0].fd = net;
+	    set[0].events = POLLOUT;
+	    netflush();
+	    while (NETROOM() < 6) {
+		(void) poll(set, 1, INFTIM);
+		netflush();
+	    }
+	}
+	c = ring_empty_count(&netoring);
+	if (c > count) {
+	    c = count;
+	}
+	loop = c;
+	while (loop) {
+	    if (((unsigned char)*buffer) == IAC) {
+		break;
+	    }
+	    buffer++;
+	    loop--;
+	}
+	if ((c = c-loop)) {
+	    ring_supply_data(&netoring, buffer-c, c);
+	    count -= c;
+	}
+	if (loop) {
+	    NET2ADD(IAC, IAC);
+	    count--;
+	    buffer++;
+	}
+    }
+
+    if (done) {
+	NET2ADD(IAC, EOR);
+	netflush();		/* try to move along as quickly as ... */
+    }
+    return(origCount - count);
+}
+
+
+void
+inputAvailable(int signo)
+{
+    HaveInput = 1;
+    sigiocount++;
+}
+
+void
+outputPurge(void)
+{
+    (void) ttyflush(1);
+}
+
+
+/*
+ * The following routines are places where the various tn3270
+ * routines make calls into telnet.c.
+ */
+
+/*
+ * DataToTerminal - queue up some data to go to terminal.
+ *
+ * Note: there are people who call us and depend on our processing
+ * *all* the data at one time (thus the poll).
+ */
+
+int
+DataToTerminal(
+    char	*buffer,		/* where the data is */
+    int	count)			/* how much to send */
+{
+    int c;
+    int origCount;
+
+    origCount = count;
+
+    while (count) {
+	if (TTYROOM() == 0) {
+	    struct pollfd set[1];
+
+	    set[0].fd = tout;
+	    set[0].events = POLLOUT;
+	    (void) ttyflush(0);
+	    while (TTYROOM() == 0) {
+		(void) poll(set, 1, INFTIM);
+		(void) ttyflush(0);
+	    }
+	}
+	c = TTYROOM();
+	if (c > count) {
+	    c = count;
+	}
+	ring_supply_data(&ttyoring, buffer, c);
+	count -= c;
+	buffer += c;
+    }
+    return(origCount);
+}
+
+
+/*
+ * Push3270 - Try to send data along the 3270 output (to screen) direction.
+ */
+
+int
+Push3270(void)
+{
+    int save = ring_full_count(&netiring);
+
+    if (save) {
+	if (Ifrontp+save > Ibuf+sizeof Ibuf) {
+	    if (Ibackp != Ibuf) {
+		memmove(Ibuf, Ibackp, Ifrontp-Ibackp);
+		Ifrontp -= (Ibackp-Ibuf);
+		Ibackp = Ibuf;
+	    }
+	}
+	if (Ifrontp+save < Ibuf+sizeof Ibuf) {
+	    (void)telrcv();
+	}
+    }
+    return save != ring_full_count(&netiring);
+}
+
+
+/*
+ * Finish3270 - get the last dregs of 3270 data out to the terminal
+ *		before quitting.
+ */
+
+void
+Finish3270(void)
+{
+    while (Push3270() || !DoTerminalOutput()) {
+	HaveInput = 0;
+	;
+    }
+}
+
+
+/* StringToTerminal - output a null terminated string to the terminal */
+
+void
+StringToTerminal(char *s)
+{
+    int count;
+
+    count = strlen(s);
+    if (count) {
+	(void) DataToTerminal(s, count);	/* we know it always goes... */
+    }
+}
+
+
+/* _putchar - output a single character to the terminal.  This name is so that
+ *	curses(3x) can call us to send out data.
+ */
+
+int
+_putchar(int cc)
+{
+    char c = (char)cc;
+    if (cursesdata) {
+	Dump('>', &c, 1);
+    }
+    if (!TTYROOM()) {
+	(void) DataToTerminal(&c, 1);
+    } else {
+	TTYADD(c);
+    }
+
+    return (0);
+}
+
+void
+SetIn3270(void)
+{
+    if (Sent3270TerminalType && my_want_state_is_will(TELOPT_BINARY)
+		&& my_want_state_is_do(TELOPT_BINARY) && !donebinarytoggle) {
+	if (!In3270) {
+	    In3270 = 1;
+	    Init3270();		/* Initialize 3270 functions */
+	    /* initialize terminal key mapping */
+	    InitTerminal();	/* Start terminal going */
+	    setconnmode(0);
+	}
+    } else {
+	if (In3270) {
+	    StopScreen(1);
+	    In3270 = 0;
+	    Stop3270();		/* Tell 3270 we aren't here anymore */
+	    setconnmode(0);
+	}
+    }
+}
+
+/*
+ * tn3270_ttype()
+ *
+ *	Send a response to a terminal type negotiation.
+ *
+ *	Return '0' if no more responses to send; '1' if a response sent.
+ */
+
+int
+tn3270_ttype(void)
+{
+    /*
+     * Try to send a 3270 type terminal name.  Decide which one based
+     * on the format of our screen, and (in the future) color
+     * capaiblities.
+     */
+    InitTerminal();		/* Sets MaxNumberColumns, MaxNumberLines */
+    if ((MaxNumberLines >= 24) && (MaxNumberColumns >= 80)) {
+	Sent3270TerminalType = 1;
+	if ((MaxNumberLines >= 27) && (MaxNumberColumns >= 132)) {
+	    MaxNumberLines = 27;
+	    MaxNumberColumns = 132;
+	    sb_terminal[SBTERMMODEL] = '5';
+	} else if (MaxNumberLines >= 43) {
+	    MaxNumberLines = 43;
+	    MaxNumberColumns = 80;
+	    sb_terminal[SBTERMMODEL] = '4';
+	} else if (MaxNumberLines >= 32) {
+	    MaxNumberLines = 32;
+	    MaxNumberColumns = 80;
+	    sb_terminal[SBTERMMODEL] = '3';
+	} else {
+	    MaxNumberLines = 24;
+	    MaxNumberColumns = 80;
+	    sb_terminal[SBTERMMODEL] = '2';
+	}
+	NumberLines = 24;		/* before we start out... */
+	NumberColumns = 80;
+	ScreenSize = NumberLines*NumberColumns;
+	if ((MaxNumberLines*MaxNumberColumns) > MAXSCREENSIZE) {
+	    ExitString("Programming error:  MAXSCREENSIZE too small.\n",
+								1);
+	    /*NOTREACHED*/
+	}
+	printsub('>', sb_terminal+2, sizeof sb_terminal-2);
+	ring_supply_data(&netoring, sb_terminal, sizeof sb_terminal);
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+int
+settranscom(int argc, char *argv[])
+{
+	int i;
+
+	if (argc == 1 && transcom) {
+	   transcom = 0;
+	}
+	if (argc == 1) {
+	   return 1;
+	}
+	transcom = tline;
+	(void) strlcpy(tline, argv[1], sizeof(tline));
+	for (i = 2; i < argc; ++i) {
+	    (void) strlcat(tline, " ", sizeof(tline));
+	    (void) strlcat(tline, argv[i], sizeof(tline));
+	}
+	return 1;
+}
+
+#endif	/* defined(TN3270) */

usr.bin/telnet/types.h

@@ -0,0 +1,50 @@
+/*	$NetBSD: types.h,v 1.6 2003/08/07 11:16:12 agc Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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.
+ *
+ *	from: @(#)types.h	8.1 (Berkeley) 6/6/93
+ */
+
+typedef struct {
+    char *modedescriptions;
+    char modetype;
+} Modelist;
+
+extern Modelist modelist[];
+
+typedef struct {
+    int
+	system,			/* what the current time is */
+	echotoggle,		/* last time user entered echo character */
+	modenegotiated,		/* last time operating mode negotiated */
+	didnetreceive,		/* last time we read data from network */
+	gotDM;			/* when did we last see a data mark */
+} Clocks;
+
+extern Clocks clocks;

usr.bin/telnet/utilities.c

@@ -0,0 +1,925 @@
+/*	$NetBSD: utilities.c,v 1.23 2012/01/09 16:08:55 christos Exp $	*/
+
+/*
+ * Copyright (c) 1988, 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 <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)utilities.c	8.3 (Berkeley) 5/30/95";
+#else
+__RCSID("$NetBSD: utilities.c,v 1.23 2012/01/09 16:08:55 christos Exp $");
+#endif
+#endif /* not lint */
+
+#define	TELOPTS
+#define	TELCMDS
+#define	SLC_NAMES
+#include <arpa/telnet.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <poll.h>
+
+#include <ctype.h>
+
+#include "general.h"
+#include "ring.h"
+#include "defines.h"
+#include "externs.h"
+
+#ifdef TN3270
+#include "../sys_curses/telextrn.h"
+#endif
+
+#ifdef AUTHENTICATION
+#include <libtelnet/auth.h>
+#endif
+#ifdef ENCRYPTION
+#include <libtelnet/encrypt.h>
+#endif
+
+FILE	*NetTrace = 0;		/* Not in bss, since needs to stay */
+int	prettydump;
+
+/*
+ * upcase()
+ *
+ *	Upcase (in place) the argument.
+ */
+
+void
+upcase(char *argument)
+{
+    int c;
+
+    while ((c = *argument) != 0) {
+	if (islower(c)) {
+	    *argument = toupper(c);
+	}
+	argument++;
+    }
+}
+
+/*
+ * SetSockOpt()
+ *
+ * Compensate for differences in 4.2 and 4.3 systems.
+ */
+
+int
+SetSockOpt(int fd, int level, int option, int yesno)
+{
+    return setsockopt(fd, level, option, (char *)&yesno, sizeof yesno);
+}
+
+/*
+ * The following are routines used to print out debugging information.
+ */
+
+char NetTraceFile[256] = "(standard output)";
+
+void
+SetNetTrace(char *file)
+{
+    if (NetTrace && NetTrace != stdout)
+	fclose(NetTrace);
+    if (file  && (strcmp(file, "-") != 0)) {
+	NetTrace = fopen(file, "w");
+	if (NetTrace) {
+	    strlcpy(NetTraceFile, file, sizeof(NetTraceFile));
+	    return;
+	}
+	fprintf(stderr, "Cannot open %s.\n", file);
+    }
+    NetTrace = stdout;
+    strlcpy(NetTraceFile, "(standard output)", sizeof(NetTraceFile));
+}
+
+void
+Dump(int direction, unsigned char *buffer, int length)
+{
+#   define BYTES_PER_LINE	32
+#   define min(x,y)	((x<y)? x:y)
+    unsigned char *pThis;
+    int offset;
+
+    offset = 0;
+
+    while (length) {
+	/* print one line */
+	fprintf(NetTrace, "%c 0x%x\t", direction, offset);
+	pThis = buffer;
+	if (prettydump) {
+	    buffer = buffer + min(length, BYTES_PER_LINE/2);
+	    while (pThis < buffer) {
+		fprintf(NetTrace, "%c%.2x",
+		    (((*pThis)&0xff) == 0xff) ? '*' : ' ',
+		    (*pThis)&0xff);
+		pThis++;
+	    }
+	    length -= BYTES_PER_LINE/2;
+	    offset += BYTES_PER_LINE/2;
+	} else {
+	    buffer = buffer + min(length, BYTES_PER_LINE);
+	    while (pThis < buffer) {
+		fprintf(NetTrace, "%.2x", (*pThis)&0xff);
+		pThis++;
+	    }
+	    length -= BYTES_PER_LINE;
+	    offset += BYTES_PER_LINE;
+	}
+	if (NetTrace == stdout) {
+	    fprintf(NetTrace, "\r\n");
+	} else {
+	    fprintf(NetTrace, "\n");
+	}
+	if (length < 0) {
+	    fflush(NetTrace);
+	    return;
+	}
+	/* find next unique line */
+    }
+    fflush(NetTrace);
+}
+
+
+void
+printoption(const char *direction, int cmd, int option)
+{
+	if (!showoptions)
+		return;
+	if (cmd == IAC) {
+		if (TELCMD_OK(option))
+		    fprintf(NetTrace, "%s IAC %s", direction, TELCMD(option));
+		else
+		    fprintf(NetTrace, "%s IAC %d", direction, option);
+	} else {
+		const char *fmt;
+		fmt = (cmd == WILL) ? "WILL" : (cmd == WONT) ? "WONT" :
+			(cmd == DO) ? "DO" : (cmd == DONT) ? "DONT" : 0;
+		if (fmt) {
+		    fprintf(NetTrace, "%s %s ", direction, fmt);
+		    if (TELOPT_OK(option))
+			fprintf(NetTrace, "%s", TELOPT(option));
+		    else if (option == TELOPT_EXOPL)
+			fprintf(NetTrace, "EXOPL");
+		    else
+			fprintf(NetTrace, "%d", option);
+		} else
+		    fprintf(NetTrace, "%s %d %d", direction, cmd, option);
+	}
+	if (NetTrace == stdout) {
+	    fprintf(NetTrace, "\r\n");
+	    fflush(NetTrace);
+	} else {
+	    fprintf(NetTrace, "\n");
+	}
+	return;
+}
+
+void
+optionstatus(void)
+{
+    int i;
+    extern char will_wont_resp[], do_dont_resp[];
+
+    for (i = 0; i < 256; i++) {
+	if (do_dont_resp[i]) {
+	    if (TELOPT_OK(i))
+		printf("resp DO_DONT %s: %d\n", TELOPT(i), do_dont_resp[i]);
+	    else if (TELCMD_OK(i))
+		printf("resp DO_DONT %s: %d\n", TELCMD(i), do_dont_resp[i]);
+	    else
+		printf("resp DO_DONT %d: %d\n", i,
+				do_dont_resp[i]);
+	    if (my_want_state_is_do(i)) {
+		if (TELOPT_OK(i))
+		    printf("want DO   %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want DO   %s\n", TELCMD(i));
+		else
+		    printf("want DO   %d\n", i);
+	    } else {
+		if (TELOPT_OK(i))
+		    printf("want DONT %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want DONT %s\n", TELCMD(i));
+		else
+		    printf("want DONT %d\n", i);
+	    }
+	} else {
+	    if (my_state_is_do(i)) {
+		if (TELOPT_OK(i))
+		    printf("     DO   %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("     DO   %s\n", TELCMD(i));
+		else
+		    printf("     DO   %d\n", i);
+	    }
+	}
+	if (will_wont_resp[i]) {
+	    if (TELOPT_OK(i))
+		printf("resp WILL_WONT %s: %d\n", TELOPT(i), will_wont_resp[i]);
+	    else if (TELCMD_OK(i))
+		printf("resp WILL_WONT %s: %d\n", TELCMD(i), will_wont_resp[i]);
+	    else
+		printf("resp WILL_WONT %d: %d\n",
+				i, will_wont_resp[i]);
+	    if (my_want_state_is_will(i)) {
+		if (TELOPT_OK(i))
+		    printf("want WILL %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want WILL %s\n", TELCMD(i));
+		else
+		    printf("want WILL %d\n", i);
+	    } else {
+		if (TELOPT_OK(i))
+		    printf("want WONT %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want WONT %s\n", TELCMD(i));
+		else
+		    printf("want WONT %d\n", i);
+	    }
+	} else {
+	    if (my_state_is_will(i)) {
+		if (TELOPT_OK(i))
+		    printf("     WILL %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("     WILL %s\n", TELCMD(i));
+		else
+		    printf("     WILL %d\n", i);
+	    }
+	}
+    }
+
+}
+
+void
+printsub(
+    int direction,	/* '<' or '>' */
+    unsigned char *pointer,	/* where suboption data sits */
+    int		  length)	/* length of suboption data */
+{
+    int i;
+#ifdef	ENCRYPTION
+    char buf[512];
+#endif	/* ENCRYPTION */
+    extern int want_status_response;
+
+    if (showoptions || direction == 0 ||
+	(want_status_response && (pointer[0] == TELOPT_STATUS))) {
+	if (direction) {
+	    fprintf(NetTrace, "%s IAC SB ",
+				(direction == '<')? "RCVD":"SENT");
+	    if (length >= 3) {
+		int j;
+
+		i = pointer[length-2];
+		j = pointer[length-1];
+
+		if (i != IAC || j != SE) {
+		    fprintf(NetTrace, "(terminated by ");
+		    if (TELOPT_OK(i))
+			fprintf(NetTrace, "%s ", TELOPT(i));
+		    else if (TELCMD_OK(i))
+			fprintf(NetTrace, "%s ", TELCMD(i));
+		    else
+			fprintf(NetTrace, "%d ", i);
+		    if (TELOPT_OK(j))
+			fprintf(NetTrace, "%s", TELOPT(j));
+		    else if (TELCMD_OK(j))
+			fprintf(NetTrace, "%s", TELCMD(j));
+		    else
+			fprintf(NetTrace, "%d", j);
+		    fprintf(NetTrace, ", not IAC SE!) ");
+		}
+	    }
+	    length -= 2;
+	}
+	if (length < 1) {
+	    fprintf(NetTrace, "(Empty suboption??\?)");
+	    if (NetTrace == stdout)
+		fflush(NetTrace);
+	    return;
+	}
+	switch (pointer[0]) {
+	case TELOPT_TTYPE:
+	    fprintf(NetTrace, "TERMINAL-TYPE ");
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		fprintf(NetTrace, "SEND");
+		break;
+	    default:
+		fprintf(NetTrace,
+				"- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    break;
+	case TELOPT_TSPEED:
+	    fprintf(NetTrace, "TERMINAL-SPEED");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, " IS ");
+		fprintf(NetTrace, "%.*s", length-2, (char *)pointer+2);
+		break;
+	    default:
+		if (pointer[1] == 1)
+		    fprintf(NetTrace, " SEND");
+		else
+		    fprintf(NetTrace, " %d (unknown)", pointer[1]);
+		for (i = 2; i < length; i++)
+		    fprintf(NetTrace, " ?%d?", pointer[i]);
+		break;
+	    }
+	    break;
+
+	case TELOPT_LFLOW:
+	    fprintf(NetTrace, "TOGGLE-FLOW-CONTROL");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case LFLOW_OFF:
+		fprintf(NetTrace, " OFF"); break;
+	    case LFLOW_ON:
+		fprintf(NetTrace, " ON"); break;
+	    case LFLOW_RESTART_ANY:
+		fprintf(NetTrace, " RESTART-ANY"); break;
+	    case LFLOW_RESTART_XON:
+		fprintf(NetTrace, " RESTART-XON"); break;
+	    default:
+		fprintf(NetTrace, " %d (unknown)", pointer[1]);
+	    }
+	    for (i = 2; i < length; i++)
+		fprintf(NetTrace, " ?%d?", pointer[i]);
+	    break;
+
+	case TELOPT_NAWS:
+	    fprintf(NetTrace, "NAWS");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    if (length == 2) {
+		fprintf(NetTrace, " ?%d?", pointer[1]);
+		break;
+	    }
+	    fprintf(NetTrace, " %d %d (%d)",
+		pointer[1], pointer[2],
+		(int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
+	    if (length == 4) {
+		fprintf(NetTrace, " ?%d?", pointer[3]);
+		break;
+	    }
+	    fprintf(NetTrace, " %d %d (%d)",
+		pointer[3], pointer[4],
+		(int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
+	    for (i = 5; i < length; i++)
+		fprintf(NetTrace, " ?%d?", pointer[i]);
+	    break;
+
+#ifdef AUTHENTICATION
+	case TELOPT_AUTHENTICATION:
+	    fprintf(NetTrace, "AUTHENTICATION");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_REPLY:
+	    case TELQUAL_IS:
+		fprintf(NetTrace, " %s ", (pointer[1] == TELQUAL_IS) ?
+							"IS" : "REPLY");
+		if (AUTHTYPE_NAME_OK(pointer[2]))
+		    fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[2]));
+		else
+		    fprintf(NetTrace, "%d ", pointer[2]);
+		if (length < 3) {
+		    fprintf(NetTrace, "(partial suboption??\?)");
+		    break;
+		}
+		fprintf(NetTrace, "%s|%s",
+			((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+			"CLIENT" : "SERVER",
+			((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+			"MUTUAL" : "ONE-WAY");
+
+		auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
+		fprintf(NetTrace, "%s", buf);
+		break;
+
+	    case TELQUAL_SEND:
+		i = 2;
+		fprintf(NetTrace, " SEND ");
+		while (i < length) {
+		    if (AUTHTYPE_NAME_OK(pointer[i]))
+			fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[i]));
+		    else
+			fprintf(NetTrace, "%d ", pointer[i]);
+		    if (++i >= length) {
+			fprintf(NetTrace, "(partial suboption??\?)");
+			break;
+		    }
+		    fprintf(NetTrace, "%s|%s ",
+			((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+							"CLIENT" : "SERVER",
+			((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+							"MUTUAL" : "ONE-WAY");
+		    ++i;
+		}
+		break;
+
+	    case TELQUAL_NAME:
+		i = 2;
+		fprintf(NetTrace, " NAME \"");
+		while (i < length)
+		    putc(pointer[i++], NetTrace);
+		putc('"', NetTrace);
+		break;
+
+	    default:
+		    for (i = 2; i < length; i++)
+			fprintf(NetTrace, " ?%d?", pointer[i]);
+		    break;
+	    }
+	    break;
+#endif
+
+#ifdef	ENCRYPTION
+	case TELOPT_ENCRYPT:
+		fprintf(NetTrace, "ENCRYPT");
+		if (length < 2) {
+			fprintf(NetTrace, " (empty suboption??\?)");
+			break;
+		}
+		switch (pointer[1]) {
+		case ENCRYPT_START:
+			fprintf(NetTrace, " START");
+			break;
+
+		case ENCRYPT_END:
+			fprintf(NetTrace, " END");
+			break;
+
+		case ENCRYPT_REQSTART:
+			fprintf(NetTrace, " REQUEST-START");
+			break;
+
+		case ENCRYPT_REQEND:
+			fprintf(NetTrace, " REQUEST-END");
+			break;
+
+		case ENCRYPT_IS:
+		case ENCRYPT_REPLY:
+			fprintf(NetTrace, " %s ", (pointer[1] == ENCRYPT_IS) ?
+			    "IS" : "REPLY");
+			if (length < 3) {
+				fprintf(NetTrace, " (partial suboption??\?)");
+				break;
+			}
+			if (ENCTYPE_NAME_OK(pointer[2]))
+				fprintf(NetTrace, "%s ",
+				    ENCTYPE_NAME(pointer[2]));
+			else
+				fprintf(NetTrace, " %d (unknown)", pointer[2]);
+
+			encrypt_printsub(&pointer[1], length - 1, buf,
+			    sizeof(buf));
+			fprintf(NetTrace, "%s", buf);
+			break;
+
+		case ENCRYPT_SUPPORT:
+			i = 2;
+			fprintf(NetTrace, " SUPPORT ");
+			while (i < length) {
+				if (ENCTYPE_NAME_OK(pointer[i]))
+					fprintf(NetTrace, "%s ",
+					    ENCTYPE_NAME(pointer[i]));
+				else
+					fprintf(NetTrace, "%d ", pointer[i]);
+				i++;
+			}
+			break;
+
+		case ENCRYPT_ENC_KEYID:
+			fprintf(NetTrace, " ENC_KEYID ");
+			goto encommon;
+
+		case ENCRYPT_DEC_KEYID:
+			fprintf(NetTrace, " DEC_KEYID ");
+			goto encommon;
+
+		default:
+			fprintf(NetTrace, " %d (unknown)", pointer[1]);
+		encommon:
+			for (i = 2; i < length; i++)
+				fprintf(NetTrace, " %d", pointer[i]);
+			break;
+		}
+		break;
+#endif	/* ENCRYPTION */
+
+	case TELOPT_LINEMODE:
+	    fprintf(NetTrace, "LINEMODE ");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case WILL:
+		fprintf(NetTrace, "WILL ");
+		goto common;
+	    case WONT:
+		fprintf(NetTrace, "WONT ");
+		goto common;
+	    case DO:
+		fprintf(NetTrace, "DO ");
+		goto common;
+	    case DONT:
+		fprintf(NetTrace, "DONT ");
+	    common:
+		if (length < 3) {
+		    fprintf(NetTrace, "(no option??\?)");
+		    break;
+		}
+		switch (pointer[2]) {
+		case LM_FORWARDMASK:
+		    fprintf(NetTrace, "Forward Mask");
+		    for (i = 3; i < length; i++)
+			fprintf(NetTrace, " %x", pointer[i]);
+		    break;
+		default:
+		    fprintf(NetTrace, "%d (unknown)", pointer[2]);
+		    for (i = 3; i < length; i++)
+			fprintf(NetTrace, " %d", pointer[i]);
+		    break;
+		}
+		break;
+
+	    case LM_SLC:
+		fprintf(NetTrace, "SLC");
+		for (i = 2; i < length - 2; i += 3) {
+		    if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
+			fprintf(NetTrace, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
+		    else
+			fprintf(NetTrace, " %d", pointer[i+SLC_FUNC]);
+		    switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
+		    case SLC_NOSUPPORT:
+			fprintf(NetTrace, " NOSUPPORT"); break;
+		    case SLC_CANTCHANGE:
+			fprintf(NetTrace, " CANTCHANGE"); break;
+		    case SLC_VARIABLE:
+			fprintf(NetTrace, " VARIABLE"); break;
+		    case SLC_DEFAULT:
+			fprintf(NetTrace, " DEFAULT"); break;
+		    }
+		    fprintf(NetTrace, "%s%s%s",
+			pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
+		    if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
+						SLC_FLUSHOUT| SLC_LEVELBITS))
+			fprintf(NetTrace, "(0x%x)", pointer[i+SLC_FLAGS]);
+		    fprintf(NetTrace, " %d;", pointer[i+SLC_VALUE]);
+		    if ((pointer[i+SLC_VALUE] == IAC) &&
+			(pointer[i+SLC_VALUE+1] == IAC))
+				i++;
+		}
+		for (; i < length; i++)
+		    fprintf(NetTrace, " ?%d?", pointer[i]);
+		break;
+
+	    case LM_MODE:
+		fprintf(NetTrace, "MODE ");
+		if (length < 3) {
+		    fprintf(NetTrace, "(no mode??\?)");
+		    break;
+		}
+		{
+		    char tbuf[64];
+		    sprintf(tbuf, "%s%s%s%s%s",
+			pointer[2]&MODE_EDIT ? "|EDIT" : "",
+			pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
+			pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
+			pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
+			pointer[2]&MODE_ACK ? "|ACK" : "");
+		    fprintf(NetTrace, "%s", tbuf[1] ? &tbuf[1] : "0");
+		}
+		if (pointer[2]&~(MODE_MASK))
+		    fprintf(NetTrace, " (0x%x)", pointer[2]);
+		for (i = 3; i < length; i++)
+		    fprintf(NetTrace, " ?0x%x?", pointer[i]);
+		break;
+	    default:
+		fprintf(NetTrace, "%d (unknown)", pointer[1]);
+		for (i = 2; i < length; i++)
+		    fprintf(NetTrace, " %d", pointer[i]);
+	    }
+	    break;
+
+	case TELOPT_STATUS: {
+	    const char *cp;
+	    int j, k;
+
+	    fprintf(NetTrace, "STATUS");
+
+	    switch (pointer[1]) {
+	    default:
+		if (pointer[1] == TELQUAL_SEND)
+		    fprintf(NetTrace, " SEND");
+		else
+		    fprintf(NetTrace, " %d (unknown)", pointer[1]);
+		for (i = 2; i < length; i++)
+		    fprintf(NetTrace, " ?%d?", pointer[i]);
+		break;
+	    case TELQUAL_IS:
+		if (--want_status_response < 0)
+		    want_status_response = 0;
+		if (NetTrace == stdout)
+		    fprintf(NetTrace, " IS\r\n");
+		else
+		    fprintf(NetTrace, " IS\n");
+
+		for (i = 2; i < length; i++) {
+		    switch(pointer[i]) {
+		    case DO:	cp = "DO"; goto common2;
+		    case DONT:	cp = "DONT"; goto common2;
+		    case WILL:	cp = "WILL"; goto common2;
+		    case WONT:	cp = "WONT"; goto common2;
+		    common2:
+			i++;
+			if (TELOPT_OK((int)pointer[i]))
+			    fprintf(NetTrace, " %s %s", cp, TELOPT(pointer[i]));
+			else
+			    fprintf(NetTrace, " %s %d", cp, pointer[i]);
+
+			if (NetTrace == stdout)
+			    fprintf(NetTrace, "\r\n");
+			else
+			    fprintf(NetTrace, "\n");
+			break;
+
+		    case SB:
+			fprintf(NetTrace, " SB ");
+			i++;
+			j = k = i;
+			while (j < length) {
+			    if (pointer[j] == SE) {
+				if (j+1 == length)
+				    break;
+				if (pointer[j+1] == SE)
+				    j++;
+				else
+				    break;
+			    }
+			    pointer[k++] = pointer[j++];
+			}
+			printsub(0, &pointer[i], k - i);
+			if (i < length) {
+			    fprintf(NetTrace, " SE");
+			    i = j;
+			} else
+			    i = j - 1;
+
+			if (NetTrace == stdout)
+			    fprintf(NetTrace, "\r\n");
+			else
+			    fprintf(NetTrace, "\n");
+
+			break;
+
+		    default:
+			fprintf(NetTrace, " %d", pointer[i]);
+			break;
+		    }
+		}
+		break;
+	    }
+	    break;
+	  }
+
+	case TELOPT_XDISPLOC:
+	    fprintf(NetTrace, "X-DISPLAY-LOCATION ");
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		fprintf(NetTrace, "SEND");
+		break;
+	    default:
+		fprintf(NetTrace, "- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    break;
+
+	case TELOPT_NEW_ENVIRON:
+	    fprintf(NetTrace, "NEW-ENVIRON ");
+#ifdef	OLD_ENVIRON
+	    goto env_common1;
+	case TELOPT_OLD_ENVIRON:
+	    fprintf(NetTrace, "OLD-ENVIRON");
+	env_common1:
+#endif
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, "IS ");
+		goto env_common;
+	    case TELQUAL_SEND:
+		fprintf(NetTrace, "SEND ");
+		goto env_common;
+	    case TELQUAL_INFO:
+		fprintf(NetTrace, "INFO ");
+	    env_common:
+		{
+		    static const char NQ[] = "\" ";
+		    const char *noquote = NQ;
+#if defined(ENV_HACK) && defined(OLD_ENVIRON)
+		    extern int old_env_var, old_env_value;
+#endif
+		    for (i = 2; i < length; i++ ) {
+			switch (pointer[i]) {
+			case NEW_ENV_VALUE:
+#ifdef OLD_ENVIRON
+		     /*	case NEW_ENV_OVAR: */
+			    if (pointer[0] == TELOPT_OLD_ENVIRON) {
+# ifdef	ENV_HACK
+				if (old_env_var == OLD_ENV_VALUE)
+				    fprintf(NetTrace, "%s(VALUE) ", noquote);
+				else
+# endif
+				    fprintf(NetTrace, "%sVAR ", noquote);
+			    } else
+#endif /* OLD_ENVIRON */
+				fprintf(NetTrace, "%sVALUE ", noquote);
+			    noquote = NQ;
+			    break;
+
+			case NEW_ENV_VAR:
+#ifdef OLD_ENVIRON
+		     /* case OLD_ENV_VALUE: */
+			    if (pointer[0] == TELOPT_OLD_ENVIRON) {
+# ifdef	ENV_HACK
+				if (old_env_value == OLD_ENV_VAR)
+				    fprintf(NetTrace, "%s(VAR) ", noquote);
+				else
+# endif
+				    fprintf(NetTrace, "%sVALUE ", noquote);
+			    } else
+#endif /* OLD_ENVIRON */
+				fprintf(NetTrace, "%sVAR ", noquote);
+			    noquote = NQ;
+			    break;
+
+			case ENV_ESC:
+			    fprintf(NetTrace, "%sESC ", noquote);
+			    noquote = NQ;
+			    break;
+
+			case ENV_USERVAR:
+			    fprintf(NetTrace, "%sUSERVAR ", noquote);
+			    noquote = NQ;
+			    break;
+
+			default:
+			    if (isprint(pointer[i]) && pointer[i] != '"') {
+				if (*noquote) {
+				    putc('"', NetTrace);
+				    noquote = "";
+				}
+				putc(pointer[i], NetTrace);
+			    } else {
+				fprintf(NetTrace, "%s%03o ", noquote,
+							pointer[i]);
+				noquote = NQ;
+			    }
+			    break;
+			}
+		    }
+		    if (!noquote)
+			putc('"', NetTrace);
+		    break;
+		}
+	    }
+	    break;
+
+	default:
+	    if (TELOPT_OK(pointer[0]))
+		fprintf(NetTrace, "%s (unknown)", TELOPT(pointer[0]));
+	    else
+		fprintf(NetTrace, "%d (unknown)", pointer[0]);
+	    for (i = 1; i < length; i++)
+		fprintf(NetTrace, " %d", pointer[i]);
+	    break;
+	}
+	if (direction) {
+	    if (NetTrace == stdout)
+		fprintf(NetTrace, "\r\n");
+	    else
+		fprintf(NetTrace, "\n");
+	}
+	if (NetTrace == stdout)
+	    fflush(NetTrace);
+    }
+}
+
+/* EmptyTerminal - called to make sure that the terminal buffer is empty.
+ *			Note that we consider the buffer to run all the
+ *			way to the kernel (thus the poll).
+ */
+
+void
+EmptyTerminal(void)
+{
+    struct pollfd set[1];
+
+    set[0].fd = tout;
+    set[0].events = POLLOUT;
+
+    if (TTYBYTES() == 0) {
+	(void) poll(set, 1, INFTIM);
+    } else {
+	while (TTYBYTES()) {
+	    (void) ttyflush(0);
+	    (void) poll(set, 1, INFTIM);
+	}
+    }
+}
+
+void
+SetForExit(void)
+{
+    setconnmode(0);
+#ifdef TN3270
+    if (In3270) {
+	Finish3270();
+    }
+#else	/* defined(TN3270) */
+    do {
+	(void)telrcv();			/* Process any incoming data */
+	EmptyTerminal();
+    } while (ring_full_count(&netiring));	/* While there is any */
+#endif	/* defined(TN3270) */
+    setcommandmode();
+    fflush(stdout);
+    fflush(stderr);
+#ifdef TN3270
+    if (In3270) {
+	StopScreen(1);
+    }
+#endif	/* defined(TN3270) */
+    setconnmode(0);
+    EmptyTerminal();			/* Flush the path to the tty */
+    setcommandmode();
+}
+
+void
+Exit(int returnCode)
+{
+    SetForExit();
+    exit(returnCode);
+}
+
+void
+ExitString(const char *string, int returnCode)
+{
+    SetForExit();
+    fwrite(string, 1, strlen(string), stderr);
+    exit(returnCode);
+}