9 files changed, 6520 insertions, 0 deletions

diff --git a/crypto/kerberosIV/man/kinit.1 b/crypto/kerberosIV/man/kinit.1
new file mode 100644
index 000000000000..75f0e709c7d7
--- /dev/null
+++ b/crypto/kerberosIV/man/kinit.1
@@ -0,0 +1,136 @@
+.\" $Id$
+.\" Copyright 1989 by the Massachusetts Institute of Technology.
+.\"
+.\" For copying and distribution information,
+.\" please see the file <mit-copyright.h>.
+.\"
+.TH KINIT 1 "Kerberos Version 4.0" "MIT Project Athena"
+.SH NAME
+kinit \- Kerberos login utility
+.SH SYNOPSIS
+.B kinit
+[
+.B \-irvlp
+]
+.SH DESCRIPTION
+The
+.I kinit
+command is used to login to the
+Kerberos
+authentication and authorization system.
+Note that only registered
+Kerberos
+users can use the
+Kerberos
+system.
+For information about registering as a
+Kerberos
+user,
+see the
+.I kerberos(1)
+manual page.
+.PP
+If you are logged in to a workstation that is running the
+.I toehold
+service,
+you do not have to use
+.I kinit.
+The
+.I toehold
+login procedure will log you into
+Kerberos
+automatically.
+You will need to use
+.I kinit
+only in those situations in which
+your original tickets have expired.
+(Tickets expire in about a day.)
+Note as well that
+.I toehold
+will automatically destroy your tickets when you logout from the workstation.
+.PP
+When you use
+.I kinit
+without options,
+the utility
+prompts for your username and Kerberos password,
+and tries to authenticate your login with the local
+Kerberos
+server.
+.PP
+If
+Kerberos
+authenticates the login attempt,
+.I kinit
+retrieves your initial ticket and puts it in the ticket file specified by
+your KRBTKFILE environment variable.
+If this variable is undefined,
+your ticket will be stored in the
+.IR /tmp
+directory,
+in the file
+.I tktuid ,
+where
+.I uid
+specifies your user identification number.
+.PP
+If you have logged in to
+Kerberos
+without the benefit of the workstation
+.I toehold
+system,
+make sure you use the
+.I kdestroy
+command to destroy any active tickets before you end your login session.
+You may want to put the
+.I kdestroy
+command in your
+.I \.logout
+file so that your tickets will be destroyed automatically when you logout.
+.PP
+The options to
+.I kinit
+are as follows:
+.TP 7
+.B \-i
+.I kinit
+prompts you for a
+Kerberos
+instance.
+.TP
+.B \-r
+.I kinit
+prompts you for a
+Kerberos
+realm.
+This option lets you authenticate yourself with a remote
+Kerberos
+server.
+.TP
+.B \-v
+Verbose mode.
+.I kinit
+prints the realm you are in, the name of the ticket file used, and
+a status message indicating the success or failure of
+your login attempt.
+.TP
+.B \-l
+.I kinit
+prompts you for a ticket lifetime in minutes.  Due to protocol
+restrictions in Kerberos Version 4, this value must be between 5 and
+1275 minutes.
+.TP
+.B \-p
+.I kinit
+will acquires a ticket for chpass.kerberos.
+.SH SEE ALSO
+.PP
+kerberos(1), kdestroy(1), klist(1), toehold(1)
+.SH BUGS
+The
+.B \-r
+option has not been fully implemented.
+.SH AUTHORS
+Steve Miller, MIT Project Athena/Digital Equipment Corporation
+.br
+Clifford Neuman, MIT Project Athena
diff --git a/crypto/telnet/telnetd/authenc.c b/crypto/telnet/telnetd/authenc.c
new file mode 100644
index 000000000000..347875391088
--- /dev/null
+++ b/crypto/telnet/telnetd/authenc.c
@@ -0,0 +1,94 @@
+/*-
+ * 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. 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.
+ */
+
+#ifndef lint
+#if 0
+static const char sccsid[] = "@(#)authenc.c	8.2 (Berkeley) 5/30/95";
+#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
+
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+#include "telnetd.h"
+#include <libtelnet/misc.h>
+
+	int
+net_write(str, len)
+	unsigned char *str;
+	int len;
+{
+	if (nfrontp + len < netobuf + BUFSIZ) {
+		memmove((void *)nfrontp, (void *)str, len);
+		nfrontp += len;
+		return(len);
+	}
+	return(0);
+}
+
+	void
+net_encrypt()
+{
+#ifdef	ENCRYPTION
+	char *s = (nclearto > nbackp) ? nclearto : nbackp;
+	if (s < nfrontp && encrypt_output) {
+		(*encrypt_output)((unsigned char *)s, nfrontp - s);
+	}
+	nclearto = nfrontp;
+#endif /* ENCRYPTION */
+}
+
+	int
+telnet_spin()
+{
+	ttloop();
+	return(0);
+}
+
+	char *
+telnet_getenv(val)
+	char *val;
+{
+	return(getenv(val));
+}
+
+	char *
+telnet_gets(prompt, result, length, echo)
+	char *prompt;
+	char *result;
+	int length;
+	int echo;
+{
+	return((char *)0);
+}
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION) */
diff --git a/crypto/telnet/telnetd/global.c b/crypto/telnet/telnetd/global.c
new file mode 100644
index 000000000000..d66c6862284d
--- /dev/null
+++ b/crypto/telnet/telnetd/global.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. 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.
+ */
+
+#ifndef lint
+#if 0
+static const char sccsid[] = "@(#)global.c	8.1 (Berkeley) 6/4/93";
+#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
+
+/*
+ * Allocate global variables.  We do this
+ * by including the header file that defines
+ * them all as externs, but first we define
+ * the keyword "extern" to be nothing, so that
+ * we will actually allocate the space.
+ */
+
+#include "defs.h"
+#define extern
+#include "ext.h"
diff --git a/crypto/telnet/telnetd/slc.c b/crypto/telnet/telnetd/slc.c
new file mode 100644
index 000000000000..90780f308670
--- /dev/null
+++ b/crypto/telnet/telnetd/slc.c
@@ -0,0 +1,495 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. 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.
+ */
+
+#ifndef lint
+#if 0
+static const char sccsid[] = "@(#)slc.c	8.2 (Berkeley) 5/30/95";
+#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
+
+#include "telnetd.h"
+
+#ifdef	LINEMODE
+/*
+ * local variables
+ */
+static unsigned char	*def_slcbuf = (unsigned char *)0;
+static int		def_slclen = 0;
+static int		slcchange;	/* change to slc is requested */
+static unsigned char	*slcptr;	/* pointer into slc buffer */
+static unsigned char	slcbuf[NSLC*6];	/* buffer for slc negotiation */
+
+/*
+ * send_slc
+ *
+ * Write out the current special characters to the client.
+ */
+	void
+send_slc()
+{
+	register int i;
+
+	/*
+	 * Send out list of triplets of special characters
+	 * to client.  We only send info on the characters
+	 * that are currently supported.
+	 */
+	for (i = 1; i <= NSLC; i++) {
+		if ((slctab[i].defset.flag & SLC_LEVELBITS) == SLC_NOSUPPORT)
+			continue;
+		add_slc((unsigned char)i, slctab[i].current.flag,
+							slctab[i].current.val);
+	}
+
+}  /* end of send_slc */
+
+/*
+ * default_slc
+ *
+ * Set pty special characters to all the defaults.
+ */
+	void
+default_slc()
+{
+	register int i;
+
+	for (i = 1; i <= NSLC; i++) {
+		slctab[i].current.val = slctab[i].defset.val;
+		if (slctab[i].current.val == (cc_t)(_POSIX_VDISABLE))
+			slctab[i].current.flag = SLC_NOSUPPORT;
+		else
+			slctab[i].current.flag = slctab[i].defset.flag;
+		if (slctab[i].sptr) {
+			*(slctab[i].sptr) = slctab[i].defset.val;
+		}
+	}
+	slcchange = 1;
+
+}  /* end of default_slc */
+#endif	/* LINEMODE */
+
+/*
+ * get_slc_defaults
+ *
+ * Initialize the slc mapping table.
+ */
+	void
+get_slc_defaults()
+{
+	register int i;
+
+	init_termbuf();
+
+	for (i = 1; i <= NSLC; i++) {
+		slctab[i].defset.flag =
+			spcset(i, &slctab[i].defset.val, &slctab[i].sptr);
+		slctab[i].current.flag = SLC_NOSUPPORT;
+		slctab[i].current.val = 0;
+	}
+
+}  /* end of get_slc_defaults */
+
+#ifdef	LINEMODE
+/*
+ * add_slc
+ *
+ * Add an slc triplet to the slc buffer.
+ */
+	void
+add_slc(func, flag, val)
+	register char func, flag;
+	register cc_t val;
+{
+
+	if ((*slcptr++ = (unsigned char)func) == 0xff)
+		*slcptr++ = 0xff;
+
+	if ((*slcptr++ = (unsigned char)flag) == 0xff)
+		*slcptr++ = 0xff;
+
+	if ((*slcptr++ = (unsigned char)val) == 0xff)
+		*slcptr++ = 0xff;
+
+}  /* end of add_slc */
+
+/*
+ * start_slc
+ *
+ * Get ready to process incoming slc's and respond to them.
+ *
+ * The parameter getit is non-zero if it is necessary to grab a copy
+ * of the terminal control structures.
+ */
+	void
+start_slc(getit)
+	register int getit;
+{
+
+	slcchange = 0;
+	if (getit)
+		init_termbuf();
+	(void) sprintf((char *)slcbuf, "%c%c%c%c",
+					IAC, SB, TELOPT_LINEMODE, LM_SLC);
+	slcptr = slcbuf + 4;
+
+}  /* end of start_slc */
+
+/*
+ * end_slc
+ *
+ * Finish up the slc negotiation.  If something to send, then send it.
+ */
+	int
+end_slc(bufp)
+	register unsigned char **bufp;
+{
+	register int len;
+	void netflush();
+
+	/*
+	 * If a change has occured, store the new terminal control
+	 * structures back to the terminal driver.
+	 */
+	if (slcchange) {
+		set_termbuf();
+	}
+
+	/*
+	 * If the pty state has not yet been fully processed and there is a
+	 * deferred slc request from the client, then do not send any
+	 * sort of slc negotiation now.  We will respond to the client's
+	 * request very soon.
+	 */
+	if (def_slcbuf && (terminit() == 0)) {
+		return(0);
+	}
+
+	if (slcptr > (slcbuf + 4)) {
+		if (bufp) {
+			*bufp = &slcbuf[4];
+			return(slcptr - slcbuf - 4);
+		} else {
+			(void) sprintf((char *)slcptr, "%c%c", IAC, SE);
+			slcptr += 2;
+			len = slcptr - slcbuf;
+			writenet(slcbuf, len);
+			netflush();  /* force it out immediately */
+			DIAG(TD_OPTIONS, printsub('>', slcbuf+2, len-2););
+		}
+	}
+	return (0);
+
+}  /* end of end_slc */
+
+/*
+ * process_slc
+ *
+ * Figure out what to do about the client's slc
+ */
+	void
+process_slc(func, flag, val)
+	register unsigned char func, flag;
+	register cc_t val;
+{
+	register int hislevel, mylevel, ack;
+
+	/*
+	 * Ensure that we know something about this function
+	 */
+	if (func > NSLC) {
+		add_slc(func, SLC_NOSUPPORT, 0);
+		return;
+	}
+
+	/*
+	 * Process the special case requests of 0 SLC_DEFAULT 0
+	 * and 0 SLC_VARIABLE 0.  Be a little forgiving here, don't
+	 * worry about whether the value is actually 0 or not.
+	 */
+	if (func == 0) {
+		if ((flag = flag & SLC_LEVELBITS) == SLC_DEFAULT) {
+			default_slc();
+			send_slc();
+		} else if (flag == SLC_VARIABLE) {
+			send_slc();
+		}
+		return;
+	}
+
+	/*
+	 * Appears to be a function that we know something about.  So
+	 * get on with it and see what we know.
+	 */
+
+	hislevel = flag & SLC_LEVELBITS;
+	mylevel = slctab[func].current.flag & SLC_LEVELBITS;
+	ack = flag & SLC_ACK;
+	/*
+	 * ignore the command if:
+	 * the function value and level are the same as what we already have;
+	 * or the level is the same and the ack bit is set
+	 */
+	if (hislevel == mylevel && (val == slctab[func].current.val || ack)) {
+		return;
+	} else if (ack) {
+		/*
+		 * If we get here, we got an ack, but the levels don't match.
+		 * This shouldn't happen.  If it does, it is probably because
+		 * we have sent two requests to set a variable without getting
+		 * a response between them, and this is the first response.
+		 * So, ignore it, and wait for the next response.
+		 */
+		return;
+	} else {
+		change_slc(func, flag, val);
+	}
+
+}  /* end of process_slc */
+
+/*
+ * change_slc
+ *
+ * Process a request to change one of our special characters.
+ * Compare client's request with what we are capable of supporting.
+ */
+	void
+change_slc(func, flag, val)
+	register char func, flag;
+	register cc_t val;
+{
+	register int hislevel, mylevel;
+
+	hislevel = flag & SLC_LEVELBITS;
+	mylevel = slctab[(int)func].defset.flag & SLC_LEVELBITS;
+	/*
+	 * If client is setting a function to NOSUPPORT
+	 * or DEFAULT, then we can easily and directly
+	 * accomodate the request.
+	 */
+	if (hislevel == SLC_NOSUPPORT) {
+		slctab[(int)func].current.flag = flag;
+		slctab[(int)func].current.val = (cc_t)_POSIX_VDISABLE;
+		flag |= SLC_ACK;
+		add_slc(func, flag, val);
+		return;
+	}
+	if (hislevel == SLC_DEFAULT) {
+		/*
+		 * Special case here.  If client tells us to use
+		 * the default on a function we don't support, then
+		 * return NOSUPPORT instead of what we may have as a
+		 * default level of DEFAULT.
+		 */
+		if (mylevel == SLC_DEFAULT) {
+			slctab[(int)func].current.flag = SLC_NOSUPPORT;
+		} else {
+			slctab[(int)func].current.flag = slctab[(int)func].defset.flag;
+		}
+		slctab[(int)func].current.val = slctab[(int)func].defset.val;
+		add_slc(func, slctab[(int)func].current.flag,
+						slctab[(int)func].current.val);
+		return;
+	}
+
+	/*
+	 * Client wants us to change to a new value or he
+	 * is telling us that he can't change to our value.
+	 * Some of the slc's we support and can change,
+	 * some we do support but can't change,
+	 * and others we don't support at all.
+	 * If we can change it then we have a pointer to
+	 * the place to put the new value, so change it,
+	 * otherwise, continue the negotiation.
+	 */
+	if (slctab[(int)func].sptr) {
+		/*
+		 * We can change this one.
+		 */
+		slctab[(int)func].current.val = val;
+		*(slctab[(int)func].sptr) = val;
+		slctab[(int)func].current.flag = flag;
+		flag |= SLC_ACK;
+		slcchange = 1;
+		add_slc(func, flag, val);
+	} else {
+		/*
+		* It is not possible for us to support this
+		* request as he asks.
+		*
+		* If our level is DEFAULT, then just ack whatever was
+		* sent.
+		*
+		* If he can't change and we can't change,
+		* then degenerate to NOSUPPORT.
+		*
+		* Otherwise we send our level back to him, (CANTCHANGE
+		* or NOSUPPORT) and if CANTCHANGE, send
+		* our value as well.
+		*/
+		if (mylevel == SLC_DEFAULT) {
+			slctab[(int)func].current.flag = flag;
+			slctab[(int)func].current.val = val;
+			flag |= SLC_ACK;
+		} else if (hislevel == SLC_CANTCHANGE &&
+				    mylevel == SLC_CANTCHANGE) {
+			flag &= ~SLC_LEVELBITS;
+			flag |= SLC_NOSUPPORT;
+			slctab[(int)func].current.flag = flag;
+		} else {
+			flag &= ~SLC_LEVELBITS;
+			flag |= mylevel;
+			slctab[(int)func].current.flag = flag;
+			if (mylevel == SLC_CANTCHANGE) {
+				slctab[(int)func].current.val =
+					slctab[(int)func].defset.val;
+				val = slctab[(int)func].current.val;
+			}
+		}
+		add_slc(func, flag, val);
+	}
+
+}  /* end of change_slc */
+
+#if	defined(USE_TERMIO) && (VEOF == VMIN)
+cc_t oldeofc = '\004';
+#endif
+
+/*
+ * check_slc
+ *
+ * Check the special characters in use and notify the client if any have
+ * changed.  Only those characters that are capable of being changed are
+ * likely to have changed.  If a local change occurs, kick the support level
+ * and flags up to the defaults.
+ */
+	void
+check_slc()
+{
+	register int i;
+
+	for (i = 1; i <= NSLC; i++) {
+#if	defined(USE_TERMIO) && (VEOF == VMIN)
+		/*
+		 * In a perfect world this would be a neat little
+		 * function.  But in this world, we should not notify
+		 * client of changes to the VEOF char when
+		 * ICANON is off, because it is not representing
+		 * a special character.
+		 */
+		if (i == SLC_EOF) {
+			if (!tty_isediting())
+				continue;
+			else if (slctab[i].sptr)
+				oldeofc = *(slctab[i].sptr);
+		}
+#endif	/* defined(USE_TERMIO) && defined(SYSV_TERMIO) */
+		if (slctab[i].sptr &&
+				(*(slctab[i].sptr) != slctab[i].current.val)) {
+			slctab[i].current.val = *(slctab[i].sptr);
+			if (*(slctab[i].sptr) == (cc_t)_POSIX_VDISABLE)
+				slctab[i].current.flag = SLC_NOSUPPORT;
+			else
+				slctab[i].current.flag = slctab[i].defset.flag;
+			add_slc((unsigned char)i, slctab[i].current.flag,
+						slctab[i].current.val);
+		}
+	}
+}  /* check_slc */
+
+/*
+ * do_opt_slc
+ *
+ * Process an slc option buffer.  Defer processing of incoming slc's
+ * until after the terminal state has been processed.  Save the first slc
+ * request that comes along, but discard all others.
+ *
+ * ptr points to the beginning of the buffer, len is the length.
+ */
+	void
+do_opt_slc(ptr, len)
+	register unsigned char *ptr;
+	register int len;
+{
+	register unsigned char func, flag;
+	cc_t val;
+	register unsigned char *end = ptr + len;
+
+	if (terminit()) {  /* go ahead */
+		while (ptr < end) {
+			func = *ptr++;
+			if (ptr >= end) break;
+			flag = *ptr++;
+			if (ptr >= end) break;
+			val = (cc_t)*ptr++;
+
+			process_slc(func, flag, val);
+
+		}
+	} else {
+		/*
+		 * save this slc buffer if it is the first, otherwise dump
+		 * it.
+		 */
+		if (def_slcbuf == (unsigned char *)0) {
+			def_slclen = len;
+			def_slcbuf = (unsigned char *)malloc((unsigned)len);
+			if (def_slcbuf == (unsigned char *)0)
+				return;  /* too bad */
+			memmove(def_slcbuf, ptr, len);
+		}
+	}
+
+}  /* end of do_opt_slc */
+
+/*
+ * deferslc
+ *
+ * Do slc stuff that was deferred.
+ */
+	void
+deferslc()
+{
+	if (def_slcbuf) {
+		start_slc(1);
+		do_opt_slc(def_slcbuf, def_slclen);
+		(void) end_slc(0);
+		free(def_slcbuf);
+		def_slcbuf = (unsigned char *)0;
+		def_slclen = 0;
+	}
+
+}  /* end of deferslc */
+
+#endif	/* LINEMODE */
diff --git a/crypto/telnet/telnetd/state.c b/crypto/telnet/telnetd/state.c
new file mode 100644
index 000000000000..2aef1dc104b7
--- /dev/null
+++ b/crypto/telnet/telnetd/state.c
@@ -0,0 +1,1619 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. 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.
+ */
+
+#ifndef lint
+#if 0
+static const char sccsid[] = "@(#)state.c	8.5 (Berkeley) 5/30/95";
+#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
+
+#include "telnetd.h"
+#if	defined(AUTHENTICATION)
+#include <libtelnet/auth.h>
+#endif
+#if	defined(ENCRYPTION)
+#include <libtelnet/encrypt.h>
+#endif
+
+unsigned char	doopt[] = { IAC, DO, '%', 'c', 0 };
+unsigned char	dont[] = { IAC, DONT, '%', 'c', 0 };
+unsigned char	will[] = { IAC, WILL, '%', 'c', 0 };
+unsigned char	wont[] = { IAC, WONT, '%', 'c', 0 };
+int	not42 = 1;
+
+/*
+ * Buffer for sub-options, and macros
+ * for suboptions buffer manipulations
+ */
+unsigned char subbuffer[512], *subpointer= subbuffer, *subend= subbuffer;
+
+#define	SB_CLEAR()	subpointer = subbuffer
+#define	SB_TERM()	{ subend = subpointer; SB_CLEAR(); }
+#define	SB_ACCUM(c)	if (subpointer < (subbuffer+sizeof subbuffer)) { \
+				*subpointer++ = (c); \
+			}
+#define	SB_GET()	((*subpointer++)&0xff)
+#define	SB_EOF()	(subpointer >= subend)
+#define	SB_LEN()	(subend - subpointer)
+
+#ifdef	ENV_HACK
+unsigned char *subsave;
+#define SB_SAVE()	subsave = subpointer;
+#define	SB_RESTORE()	subpointer = subsave;
+#endif
+
+
+/*
+ * State for recv fsm
+ */
+#define	TS_DATA		0	/* base state */
+#define	TS_IAC		1	/* look for double IAC's */
+#define	TS_CR		2	/* CR-LF ->'s CR */
+#define	TS_SB		3	/* throw away begin's... */
+#define	TS_SE		4	/* ...end's (suboption negotiation) */
+#define	TS_WILL		5	/* will option negotiation */
+#define	TS_WONT		6	/* wont " */
+#define	TS_DO		7	/* do " */
+#define	TS_DONT		8	/* dont " */
+
+	void
+telrcv()
+{
+	register int c;
+	static int state = TS_DATA;
+#if	defined(CRAY2) && defined(UNICOS5)
+	char *opfrontp = pfrontp;
+#endif
+
+	while (ncc > 0) {
+		if ((&ptyobuf[BUFSIZ] - pfrontp) < 2)
+			break;
+		c = *netip++ & 0377, ncc--;
+#ifdef	ENCRYPTION
+		if (decrypt_input)
+			c = (*decrypt_input)(c);
+#endif	/* ENCRYPTION */
+		switch (state) {
+
+		case TS_CR:
+			state = TS_DATA;
+			/* Strip off \n or \0 after a \r */
+			if ((c == 0) || (c == '\n')) {
+				break;
+			}
+			/* FALL THROUGH */
+
+		case TS_DATA:
+			if (c == IAC) {
+				state = TS_IAC;
+				break;
+			}
+			/*
+			 * We now map \r\n ==> \r for pragmatic reasons.
+			 * Many client implementations send \r\n when
+			 * the user hits the CarriageReturn key.
+			 *
+			 * We USED to map \r\n ==> \n, since \r\n says
+			 * that we want to be in column 1 of the next
+			 * printable line, and \n is the standard
+			 * unix way of saying that (\r is only good
+			 * if CRMOD is set, which it normally is).
+			 */
+			if ((c == '\r') && his_state_is_wont(TELOPT_BINARY)) {
+				int nc = *netip;
+#ifdef	ENCRYPTION
+				if (decrypt_input)
+					nc = (*decrypt_input)(nc & 0xff);
+#endif	/* ENCRYPTION */
+#ifdef	LINEMODE
+				/*
+				 * If we are operating in linemode,
+				 * convert to local end-of-line.
+				 */
+				if (linemode && (ncc > 0) && (('\n' == nc) ||
+					 ((0 == nc) && tty_iscrnl())) ) {
+					netip++; ncc--;
+					c = '\n';
+				} else
+#endif
+				{
+#ifdef	ENCRYPTION
+					if (decrypt_input)
+						(void)(*decrypt_input)(-1);
+#endif	/* ENCRYPTION */
+					state = TS_CR;
+				}
+			}
+			*pfrontp++ = c;
+			break;
+
+		case TS_IAC:
+gotiac:			switch (c) {
+
+			/*
+			 * Send the process on the pty side an
+			 * interrupt.  Do this with a NULL or
+			 * interrupt char; depending on the tty mode.
+			 */
+			case IP:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				interrupt();
+				break;
+
+			case BREAK:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				sendbrk();
+				break;
+
+			/*
+			 * Are You There?
+			 */
+			case AYT:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				recv_ayt();
+				break;
+
+			/*
+			 * Abort Output
+			 */
+			case AO:
+			    {
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				ptyflush();	/* half-hearted */
+				init_termbuf();
+
+				if (slctab[SLC_AO].sptr &&
+				    *slctab[SLC_AO].sptr != (cc_t)(_POSIX_VDISABLE)) {
+				    *pfrontp++ =
+					(unsigned char)*slctab[SLC_AO].sptr;
+				}
+
+				netclear();	/* clear buffer back */
+				*nfrontp++ = IAC;
+				*nfrontp++ = DM;
+				neturg = nfrontp-1; /* off by one XXX */
+				DIAG(TD_OPTIONS,
+					printoption("td: send IAC", DM));
+				break;
+			    }
+
+			/*
+			 * Erase Character and
+			 * Erase Line
+			 */
+			case EC:
+			case EL:
+			    {
+				cc_t ch;
+
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				ptyflush();	/* half-hearted */
+				init_termbuf();
+				if (c == EC)
+					ch = *slctab[SLC_EC].sptr;
+				else
+					ch = *slctab[SLC_EL].sptr;
+				if (ch != (cc_t)(_POSIX_VDISABLE))
+					*pfrontp++ = (unsigned char)ch;
+				break;
+			    }
+
+			/*
+			 * Check for urgent data...
+			 */
+			case DM:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				SYNCHing = stilloob(net);
+				settimer(gotDM);
+				break;
+
+
+			/*
+			 * Begin option subnegotiation...
+			 */
+			case SB:
+				state = TS_SB;
+				SB_CLEAR();
+				continue;
+
+			case WILL:
+				state = TS_WILL;
+				continue;
+
+			case WONT:
+				state = TS_WONT;
+				continue;
+
+			case DO:
+				state = TS_DO;
+				continue;
+
+			case DONT:
+				state = TS_DONT;
+				continue;
+			case EOR:
+				if (his_state_is_will(TELOPT_EOR))
+					doeof();
+				break;
+
+			/*
+			 * Handle RFC 10xx Telnet linemode option additions
+			 * to command stream (EOF, SUSP, ABORT).
+			 */
+			case xEOF:
+				doeof();
+				break;
+
+			case SUSP:
+				sendsusp();
+				break;
+
+			case ABORT:
+				sendbrk();
+				break;
+
+			case IAC:
+				*pfrontp++ = c;
+				break;
+			}
+			state = TS_DATA;
+			break;
+
+		case TS_SB:
+			if (c == IAC) {
+				state = TS_SE;
+			} else {
+				SB_ACCUM(c);
+			}
+			break;
+
+		case TS_SE:
+			if (c != SE) {
+				if (c != IAC) {
+					/*
+					 * bad form of suboption negotiation.
+					 * handle it in such a way as to avoid
+					 * damage to local state.  Parse
+					 * suboption buffer found so far,
+					 * then treat remaining stream as
+					 * another command sequence.
+					 */
+
+					/* for DIAGNOSTICS */
+					SB_ACCUM(IAC);
+					SB_ACCUM(c);
+					subpointer -= 2;
+
+					SB_TERM();
+					suboption();
+					state = TS_IAC;
+					goto gotiac;
+				}
+				SB_ACCUM(c);
+				state = TS_SB;
+			} else {
+				/* for DIAGNOSTICS */
+				SB_ACCUM(IAC);
+				SB_ACCUM(SE);
+				subpointer -= 2;
+
+				SB_TERM();
+				suboption();	/* handle sub-option */
+				state = TS_DATA;
+			}
+			break;
+
+		case TS_WILL:
+			willoption(c);
+			state = TS_DATA;
+			continue;
+
+		case TS_WONT:
+			wontoption(c);
+			state = TS_DATA;
+			continue;
+
+		case TS_DO:
+			dooption(c);
+			state = TS_DATA;
+			continue;
+
+		case TS_DONT:
+			dontoption(c);
+			state = TS_DATA;
+			continue;
+
+		default:
+			syslog(LOG_ERR, "panic state=%d", state);
+			printf("telnetd: panic state=%d\n", state);
+			exit(1);
+		}
+	}
+#if	defined(CRAY2) && defined(UNICOS5)
+	if (!linemode) {
+		char	xptyobuf[BUFSIZ+NETSLOP];
+		char	xbuf2[BUFSIZ];
+		register char *cp;
+		int n = pfrontp - opfrontp, oc;
+		memmove(xptyobuf, opfrontp, n);
+		pfrontp = opfrontp;
+		pfrontp += term_input(xptyobuf, pfrontp, n, BUFSIZ+NETSLOP,
+					xbuf2, &oc, BUFSIZ);
+		for (cp = xbuf2; oc > 0; --oc)
+			if ((*nfrontp++ = *cp++) == IAC)
+				*nfrontp++ = IAC;
+	}
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+}  /* end of telrcv */
+
+/*
+ * The will/wont/do/dont state machines are based on Dave Borman's
+ * Telnet option processing state machine.
+ *
+ * These correspond to the following states:
+ *	my_state = the last negotiated state
+ *	want_state = what I want the state to go to
+ *	want_resp = how many requests I have sent
+ * All state defaults are negative, and resp defaults to 0.
+ *
+ * When initiating a request to change state to new_state:
+ *
+ * if ((want_resp == 0 && new_state == my_state) || want_state == new_state) {
+ *	do nothing;
+ * } else {
+ *	want_state = new_state;
+ *	send new_state;
+ *	want_resp++;
+ * }
+ *
+ * When receiving new_state:
+ *
+ * if (want_resp) {
+ *	want_resp--;
+ *	if (want_resp && (new_state == my_state))
+ *		want_resp--;
+ * }
+ * if ((want_resp == 0) && (new_state != want_state)) {
+ *	if (ok_to_switch_to new_state)
+ *		want_state = new_state;
+ *	else
+ *		want_resp++;
+ *	send want_state;
+ * }
+ * my_state = new_state;
+ *
+ * Note that new_state is implied in these functions by the function itself.
+ * will and do imply positive new_state, wont and dont imply negative.
+ *
+ * Finally, there is one catch.  If we send a negative response to a
+ * positive request, my_state will be the positive while want_state will
+ * remain negative.  my_state will revert to negative when the negative
+ * acknowlegment arrives from the peer.  Thus, my_state generally tells
+ * us not only the last negotiated state, but also tells us what the peer
+ * wants to be doing as well.  It is important to understand this difference
+ * as we may wish to be processing data streams based on our desired state
+ * (want_state) or based on what the peer thinks the state is (my_state).
+ *
+ * This all works fine because if the peer sends a positive request, the data
+ * that we receive prior to negative acknowlegment will probably be affected
+ * by the positive state, and we can process it as such (if we can; if we
+ * can't then it really doesn't matter).  If it is that important, then the
+ * peer probably should be buffering until this option state negotiation
+ * is complete.
+ *
+ */
+	void
+send_do(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((do_dont_resp[option] == 0 && his_state_is_will(option)) ||
+		    his_want_state_is_will(option))
+			return;
+		/*
+		 * Special case for TELOPT_TM:  We send a DO, but pretend
+		 * that we sent a DONT, so that we can send more DOs if
+		 * we want to.
+		 */
+		if (option == TELOPT_TM)
+			set_his_want_state_wont(option);
+		else
+			set_his_want_state_will(option);
+		do_dont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)doopt, option);
+	nfrontp += sizeof (dont) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send do", option));
+}
+
+#ifdef	AUTHENTICATION
+extern void auth_request();
+#endif
+#ifdef	LINEMODE
+extern void doclientstat();
+#endif
+#ifdef	ENCRYPTION
+extern void encrypt_send_support();
+#endif	/* ENCRYPTION */
+
+	void
+willoption(option)
+	int option;
+{
+	int changeok = 0;
+	void (*func)() = 0;
+
+	/*
+	 * process input from peer.
+	 */
+
+	DIAG(TD_OPTIONS, printoption("td: recv will", option));
+
+	if (do_dont_resp[option]) {
+		do_dont_resp[option]--;
+		if (do_dont_resp[option] && his_state_is_will(option))
+			do_dont_resp[option]--;
+	}
+	if (do_dont_resp[option] == 0) {
+	    if (his_want_state_is_wont(option)) {
+		switch (option) {
+
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryin(1);
+			set_termbuf();
+			changeok++;
+			break;
+
+		case TELOPT_ECHO:
+			/*
+			 * See comments below for more info.
+			 */
+			not42 = 0;	/* looks like a 4.2 system */
+			break;
+
+		case TELOPT_TM:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			/*
+			 * This telnetd implementation does not really
+			 * support timing marks, it just uses them to
+			 * support the kludge linemode stuff.  If we
+			 * receive a will or wont TM in response to our
+			 * do TM request that may have been sent to
+			 * determine kludge linemode support, process
+			 * it, otherwise TM should get a negative
+			 * response back.
+			 */
+			/*
+			 * Handle the linemode kludge stuff.
+			 * If we are not currently supporting any
+			 * linemode at all, then we assume that this
+			 * is the client telling us to use kludge
+			 * linemode in response to our query.  Set the
+			 * linemode type that is to be supported, note
+			 * that the client wishes to use linemode, and
+			 * eat the will TM as though it never arrived.
+			 */
+			if (lmodetype < KLUDGE_LINEMODE) {
+				lmodetype = KLUDGE_LINEMODE;
+				clientstat(TELOPT_LINEMODE, WILL, 0);
+				send_wont(TELOPT_SGA, 1);
+			} else if (lmodetype == NO_AUTOKLUDGE) {
+				lmodetype = KLUDGE_OK;
+			}
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			/*
+			 * We never respond to a WILL TM, and
+			 * we leave the state WONT.
+			 */
+			return;
+
+		case TELOPT_LFLOW:
+			/*
+			 * If we are going to support flow control
+			 * option, then don't worry peer that we can't
+			 * change the flow control characters.
+			 */
+			slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XON].defset.flag |= SLC_DEFAULT;
+			slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XOFF].defset.flag |= SLC_DEFAULT;
+		case TELOPT_TTYPE:
+		case TELOPT_SGA:
+		case TELOPT_NAWS:
+		case TELOPT_TSPEED:
+		case TELOPT_XDISPLOC:
+		case TELOPT_NEW_ENVIRON:
+		case TELOPT_OLD_ENVIRON:
+			changeok++;
+			break;
+
+#ifdef	LINEMODE
+		case TELOPT_LINEMODE:
+# ifdef	KLUDGELINEMODE
+			/*
+			 * Note client's desire to use linemode.
+			 */
+			lmodetype = REAL_LINEMODE;
+# endif	/* KLUDGELINEMODE */
+			func = doclientstat;
+			changeok++;
+			break;
+#endif	/* LINEMODE */
+
+#ifdef	AUTHENTICATION
+		case TELOPT_AUTHENTICATION:
+			func = auth_request;
+			changeok++;
+			break;
+#endif
+
+#ifdef	ENCRYPTION
+		case TELOPT_ENCRYPT:
+			func = encrypt_send_support;
+			changeok++;
+			break;
+#endif	/* ENCRYPTION */
+
+		default:
+			break;
+		}
+		if (changeok) {
+			set_his_want_state_will(option);
+			send_do(option, 0);
+		} else {
+			do_dont_resp[option]++;
+			send_dont(option, 0);
+		}
+	    } else {
+		/*
+		 * Option processing that should happen when
+		 * we receive conformation of a change in
+		 * state that we had requested.
+		 */
+		switch (option) {
+		case TELOPT_ECHO:
+			not42 = 0;	/* looks like a 4.2 system */
+			/*
+			 * Egads, he responded "WILL ECHO".  Turn
+			 * it off right now!
+			 */
+			send_dont(option, 1);
+			/*
+			 * "WILL ECHO".  Kludge upon kludge!
+			 * A 4.2 client is now echoing user input at
+			 * the tty.  This is probably undesireable and
+			 * it should be stopped.  The client will
+			 * respond WONT TM to the DO TM that we send to
+			 * check for kludge linemode.  When the WONT TM
+			 * arrives, linemode will be turned off and a
+			 * change propogated to the pty.  This change
+			 * will cause us to process the new pty state
+			 * in localstat(), which will notice that
+			 * linemode is off and send a WILL ECHO
+			 * so that we are properly in character mode and
+			 * all is well.
+			 */
+			break;
+#ifdef	LINEMODE
+		case TELOPT_LINEMODE:
+# ifdef	KLUDGELINEMODE
+			/*
+			 * Note client's desire to use linemode.
+			 */
+			lmodetype = REAL_LINEMODE;
+# endif	/* KLUDGELINEMODE */
+			func = doclientstat;
+			break;
+#endif	/* LINEMODE */
+
+#ifdef	AUTHENTICATION
+		case TELOPT_AUTHENTICATION:
+			func = auth_request;
+			break;
+#endif
+
+#ifdef	ENCRYPTION
+		case TELOPT_ENCRYPT:
+			func = encrypt_send_support;
+			break;
+#endif	/* ENCRYPTION */
+		case TELOPT_LFLOW:
+			func = flowstat;
+			break;
+		}
+	    }
+	}
+	set_his_state_will(option);
+	if (func)
+		(*func)();
+}  /* end of willoption */
+
+	void
+send_dont(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((do_dont_resp[option] == 0 && his_state_is_wont(option)) ||
+		    his_want_state_is_wont(option))
+			return;
+		set_his_want_state_wont(option);
+		do_dont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)dont, option);
+	nfrontp += sizeof (doopt) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send dont", option));
+}
+
+	void
+wontoption(option)
+	int option;
+{
+	/*
+	 * Process client input.
+	 */
+
+	DIAG(TD_OPTIONS, printoption("td: recv wont", option));
+
+	if (do_dont_resp[option]) {
+		do_dont_resp[option]--;
+		if (do_dont_resp[option] && his_state_is_wont(option))
+			do_dont_resp[option]--;
+	}
+	if (do_dont_resp[option] == 0) {
+	    if (his_want_state_is_will(option)) {
+		/* it is always ok to change to negative state */
+		switch (option) {
+		case TELOPT_ECHO:
+			not42 = 1; /* doesn't seem to be a 4.2 system */
+			break;
+
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryin(0);
+			set_termbuf();
+			break;
+
+#ifdef	LINEMODE
+		case TELOPT_LINEMODE:
+# ifdef	KLUDGELINEMODE
+			/*
+			 * If real linemode is supported, then client is
+			 * asking to turn linemode off.
+			 */
+			if (lmodetype != REAL_LINEMODE)
+				break;
+# endif	/* KLUDGELINEMODE */
+			clientstat(TELOPT_LINEMODE, WONT, 0);
+			break;
+#endif	/* LINEMODE */
+
+		case TELOPT_TM:
+			/*
+			 * If we get a WONT TM, and had sent a DO TM,
+			 * don't respond with a DONT TM, just leave it
+			 * as is.  Short circut the state machine to
+			 * achive this.
+			 */
+			set_his_want_state_wont(TELOPT_TM);
+			return;
+
+		case TELOPT_LFLOW:
+			/*
+			 * If we are not going to support flow control
+			 * option, then let peer know that we can't
+			 * change the flow control characters.
+			 */
+			slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XON].defset.flag |= SLC_CANTCHANGE;
+			slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XOFF].defset.flag |= SLC_CANTCHANGE;
+			break;
+
+#if	defined(AUTHENTICATION)
+		case TELOPT_AUTHENTICATION:
+			auth_finished(0, AUTH_REJECT);
+			break;
+#endif
+
+		/*
+		 * For options that we might spin waiting for
+		 * sub-negotiation, if the client turns off the
+		 * option rather than responding to the request,
+		 * we have to treat it here as if we got a response
+		 * to the sub-negotiation, (by updating the timers)
+		 * so that we'll break out of the loop.
+		 */
+		case TELOPT_TTYPE:
+			settimer(ttypesubopt);
+			break;
+
+		case TELOPT_TSPEED:
+			settimer(tspeedsubopt);
+			break;
+
+		case TELOPT_XDISPLOC:
+			settimer(xdisplocsubopt);
+			break;
+
+		case TELOPT_OLD_ENVIRON:
+			settimer(oenvironsubopt);
+			break;
+
+		case TELOPT_NEW_ENVIRON:
+			settimer(environsubopt);
+			break;
+
+		default:
+			break;
+		}
+		set_his_want_state_wont(option);
+		if (his_state_is_will(option))
+			send_dont(option, 0);
+	    } else {
+		switch (option) {
+		case TELOPT_TM:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			if (lmodetype < NO_AUTOKLUDGE) {
+				lmodetype = NO_LINEMODE;
+				clientstat(TELOPT_LINEMODE, WONT, 0);
+				send_will(TELOPT_SGA, 1);
+				send_will(TELOPT_ECHO, 1);
+			}
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			break;
+
+#if	defined(AUTHENTICATION)
+		case TELOPT_AUTHENTICATION:
+			auth_finished(0, AUTH_REJECT);
+			break;
+#endif
+		default:
+			break;
+		}
+	    }
+	}
+	set_his_state_wont(option);
+
+}  /* end of wontoption */
+
+	void
+send_will(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((will_wont_resp[option] == 0 && my_state_is_will(option))||
+		    my_want_state_is_will(option))
+			return;
+		set_my_want_state_will(option);
+		will_wont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)will, option);
+	nfrontp += sizeof (doopt) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send will", option));
+}
+
+#if	!defined(LINEMODE) || !defined(KLUDGELINEMODE)
+/*
+ * When we get a DONT SGA, we will try once to turn it
+ * back on.  If the other side responds DONT SGA, we
+ * leave it at that.  This is so that when we talk to
+ * clients that understand KLUDGELINEMODE but not LINEMODE,
+ * we'll keep them in char-at-a-time mode.
+ */
+int turn_on_sga = 0;
+#endif
+
+	void
+dooption(option)
+	int option;
+{
+	int changeok = 0;
+
+	/*
+	 * Process client input.
+	 */
+
+	DIAG(TD_OPTIONS, printoption("td: recv do", option));
+
+	if (will_wont_resp[option]) {
+		will_wont_resp[option]--;
+		if (will_wont_resp[option] && my_state_is_will(option))
+			will_wont_resp[option]--;
+	}
+	if ((will_wont_resp[option] == 0) && (my_want_state_is_wont(option))) {
+		switch (option) {
+		case TELOPT_ECHO:
+#ifdef	LINEMODE
+# ifdef	KLUDGELINEMODE
+			if (lmodetype == NO_LINEMODE)
+# else
+			if (his_state_is_wont(TELOPT_LINEMODE))
+# endif
+#endif
+			{
+				init_termbuf();
+				tty_setecho(1);
+				set_termbuf();
+			}
+			changeok++;
+			break;
+
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryout(1);
+			set_termbuf();
+			changeok++;
+			break;
+
+		case TELOPT_SGA:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			/*
+			 * If kludge linemode is in use, then we must
+			 * process an incoming do SGA for linemode
+			 * purposes.
+			 */
+			if (lmodetype == KLUDGE_LINEMODE) {
+				/*
+				 * Receipt of "do SGA" in kludge
+				 * linemode is the peer asking us to
+				 * turn off linemode.  Make note of
+				 * the request.
+				 */
+				clientstat(TELOPT_LINEMODE, WONT, 0);
+				/*
+				 * If linemode did not get turned off
+				 * then don't tell peer that we did.
+				 * Breaking here forces a wont SGA to
+				 * be returned.
+				 */
+				if (linemode)
+					break;
+			}
+#else
+			turn_on_sga = 0;
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			changeok++;
+			break;
+
+		case TELOPT_STATUS:
+			changeok++;
+			break;
+
+		case TELOPT_TM:
+			/*
+			 * Special case for TM.  We send a WILL, but
+			 * pretend we sent a WONT.
+			 */
+			send_will(option, 0);
+			set_my_want_state_wont(option);
+			set_my_state_wont(option);
+			return;
+
+		case TELOPT_LOGOUT:
+			/*
+			 * When we get a LOGOUT option, respond
+			 * with a WILL LOGOUT, make sure that
+			 * it gets written out to the network,
+			 * and then just go away...
+			 */
+			set_my_want_state_will(TELOPT_LOGOUT);
+			send_will(TELOPT_LOGOUT, 0);
+			set_my_state_will(TELOPT_LOGOUT);
+			(void)netflush();
+			cleanup(0);
+			/* NOT REACHED */
+			break;
+
+#ifdef	ENCRYPTION
+		case TELOPT_ENCRYPT:
+			changeok++;
+			break;
+#endif	/* ENCRYPTION */
+		case TELOPT_LINEMODE:
+		case TELOPT_TTYPE:
+		case TELOPT_NAWS:
+		case TELOPT_TSPEED:
+		case TELOPT_LFLOW:
+		case TELOPT_XDISPLOC:
+#ifdef	TELOPT_ENVIRON
+		case TELOPT_NEW_ENVIRON:
+#endif
+		case TELOPT_OLD_ENVIRON:
+		default:
+			break;
+		}
+		if (changeok) {
+			set_my_want_state_will(option);
+			send_will(option, 0);
+		} else {
+			will_wont_resp[option]++;
+			send_wont(option, 0);
+		}
+	}
+	set_my_state_will(option);
+
+}  /* end of dooption */
+
+	void
+send_wont(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((will_wont_resp[option] == 0 && my_state_is_wont(option)) ||
+		    my_want_state_is_wont(option))
+			return;
+		set_my_want_state_wont(option);
+		will_wont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)wont, option);
+	nfrontp += sizeof (wont) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send wont", option));
+}
+
+	void
+dontoption(option)
+	int option;
+{
+	/*
+	 * Process client input.
+	 */
+
+
+	DIAG(TD_OPTIONS, printoption("td: recv dont", option));
+
+	if (will_wont_resp[option]) {
+		will_wont_resp[option]--;
+		if (will_wont_resp[option] && my_state_is_wont(option))
+			will_wont_resp[option]--;
+	}
+	if ((will_wont_resp[option] == 0) && (my_want_state_is_will(option))) {
+		switch (option) {
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryout(0);
+			set_termbuf();
+			break;
+
+		case TELOPT_ECHO:	/* we should stop echoing */
+#ifdef	LINEMODE
+# ifdef	KLUDGELINEMODE
+			if ((lmodetype != REAL_LINEMODE) &&
+			    (lmodetype != KLUDGE_LINEMODE))
+# else
+			if (his_state_is_wont(TELOPT_LINEMODE))
+# endif
+#endif
+			{
+				init_termbuf();
+				tty_setecho(0);
+				set_termbuf();
+			}
+			break;
+
+		case TELOPT_SGA:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			/*
+			 * If kludge linemode is in use, then we
+			 * must process an incoming do SGA for
+			 * linemode purposes.
+			 */
+			if ((lmodetype == KLUDGE_LINEMODE) ||
+			    (lmodetype == KLUDGE_OK)) {
+				/*
+				 * The client is asking us to turn
+				 * linemode on.
+				 */
+				lmodetype = KLUDGE_LINEMODE;
+				clientstat(TELOPT_LINEMODE, WILL, 0);
+				/*
+				 * If we did not turn line mode on,
+				 * then what do we say?  Will SGA?
+				 * This violates design of telnet.
+				 * Gross.  Very Gross.
+				 */
+			}
+			break;
+#else
+			set_my_want_state_wont(option);
+			if (my_state_is_will(option))
+				send_wont(option, 0);
+			set_my_state_wont(option);
+			if (turn_on_sga ^= 1)
+				send_will(option, 1);
+			return;
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+
+		default:
+			break;
+		}
+
+		set_my_want_state_wont(option);
+		if (my_state_is_will(option))
+			send_wont(option, 0);
+	}
+	set_my_state_wont(option);
+
+}  /* end of dontoption */
+
+#ifdef	ENV_HACK
+int env_ovar = -1;
+int env_ovalue = -1;
+#else	/* ENV_HACK */
+# define env_ovar OLD_ENV_VAR
+# define env_ovalue OLD_ENV_VALUE
+#endif	/* ENV_HACK */
+
+/*
+ * suboption()
+ *
+ *	Look at the sub-option buffer, and try to be helpful to the other
+ * side.
+ *
+ *	Currently we recognize:
+ *
+ *	Terminal type is
+ *	Linemode
+ *	Window size
+ *	Terminal speed
+ */
+	void
+suboption()
+{
+    register int subchar;
+
+    DIAG(TD_OPTIONS, {netflush(); printsub('<', subpointer, SB_LEN()+2);});
+
+    subchar = SB_GET();
+    switch (subchar) {
+    case TELOPT_TSPEED: {
+	register int xspeed, rspeed;
+
+	if (his_state_is_wont(TELOPT_TSPEED))	/* Ignore if option disabled */
+		break;
+
+	settimer(tspeedsubopt);
+
+	if (SB_EOF() || SB_GET() != TELQUAL_IS)
+		return;
+
+	xspeed = atoi((char *)subpointer);
+
+	while (SB_GET() != ',' && !SB_EOF());
+	if (SB_EOF())
+		return;
+
+	rspeed = atoi((char *)subpointer);
+	clientstat(TELOPT_TSPEED, xspeed, rspeed);
+
+	break;
+
+    }  /* end of case TELOPT_TSPEED */
+
+    case TELOPT_TTYPE: {		/* Yaaaay! */
+	static char terminalname[41];
+
+	if (his_state_is_wont(TELOPT_TTYPE))	/* Ignore if option disabled */
+		break;
+	settimer(ttypesubopt);
+
+	if (SB_EOF() || SB_GET() != TELQUAL_IS) {
+	    return;		/* ??? XXX but, this is the most robust */
+	}
+
+	terminaltype = terminalname;
+
+	while ((terminaltype < (terminalname + sizeof terminalname-1)) &&
+								    !SB_EOF()) {
+	    register int c;
+
+	    c = SB_GET();
+	    if (isupper(c)) {
+		c = tolower(c);
+	    }
+	    *terminaltype++ = c;    /* accumulate name */
+	}
+	*terminaltype = 0;
+	terminaltype = terminalname;
+	break;
+    }  /* end of case TELOPT_TTYPE */
+
+    case TELOPT_NAWS: {
+	register int xwinsize, ywinsize;
+
+	if (his_state_is_wont(TELOPT_NAWS))	/* Ignore if option disabled */
+		break;
+
+	if (SB_EOF())
+		return;
+	xwinsize = SB_GET() << 8;
+	if (SB_EOF())
+		return;
+	xwinsize |= SB_GET();
+	if (SB_EOF())
+		return;
+	ywinsize = SB_GET() << 8;
+	if (SB_EOF())
+		return;
+	ywinsize |= SB_GET();
+	clientstat(TELOPT_NAWS, xwinsize, ywinsize);
+
+	break;
+
+    }  /* end of case TELOPT_NAWS */
+
+#ifdef	LINEMODE
+    case TELOPT_LINEMODE: {
+	register int request;
+
+	if (his_state_is_wont(TELOPT_LINEMODE))	/* Ignore if option disabled */
+		break;
+	/*
+	 * Process linemode suboptions.
+	 */
+	if (SB_EOF())
+	    break;		/* garbage was sent */
+	request = SB_GET();	/* get will/wont */
+
+	if (SB_EOF())
+	    break;		/* another garbage check */
+
+	if (request == LM_SLC) {  /* SLC is not preceeded by WILL or WONT */
+		/*
+		 * Process suboption buffer of slc's
+		 */
+		start_slc(1);
+		do_opt_slc(subpointer, subend - subpointer);
+		(void) end_slc(0);
+		break;
+	} else if (request == LM_MODE) {
+		if (SB_EOF())
+		    return;
+		useeditmode = SB_GET();  /* get mode flag */
+		clientstat(LM_MODE, 0, 0);
+		break;
+	}
+
+	if (SB_EOF())
+	    break;
+	switch (SB_GET()) {  /* what suboption? */
+	case LM_FORWARDMASK:
+		/*
+		 * According to spec, only server can send request for
+		 * forwardmask, and client can only return a positive response.
+		 * So don't worry about it.
+		 */
+
+	default:
+		break;
+	}
+	break;
+    }  /* end of case TELOPT_LINEMODE */
+#endif
+    case TELOPT_STATUS: {
+	int mode;
+
+	if (SB_EOF())
+	    break;
+	mode = SB_GET();
+	switch (mode) {
+	case TELQUAL_SEND:
+	    if (my_state_is_will(TELOPT_STATUS))
+		send_status();
+	    break;
+
+	case TELQUAL_IS:
+	    break;
+
+	default:
+	    break;
+	}
+	break;
+    }  /* end of case TELOPT_STATUS */
+
+    case TELOPT_XDISPLOC: {
+	if (SB_EOF() || SB_GET() != TELQUAL_IS)
+		return;
+	settimer(xdisplocsubopt);
+	subpointer[SB_LEN()] = '\0';
+	(void)setenv("DISPLAY", (char *)subpointer, 1);
+	break;
+    }  /* end of case TELOPT_XDISPLOC */
+
+#ifdef	TELOPT_NEW_ENVIRON
+    case TELOPT_NEW_ENVIRON:
+#endif
+    case TELOPT_OLD_ENVIRON: {
+	register int c;
+	register char *cp, *varp, *valp;
+
+	if (SB_EOF())
+		return;
+	c = SB_GET();
+	if (c == TELQUAL_IS) {
+		if (subchar == TELOPT_OLD_ENVIRON)
+			settimer(oenvironsubopt);
+		else
+			settimer(environsubopt);
+	} else if (c != TELQUAL_INFO) {
+		return;
+	}
+
+#ifdef	TELOPT_NEW_ENVIRON
+	if (subchar == TELOPT_NEW_ENVIRON) {
+	    while (!SB_EOF()) {
+		c = SB_GET();
+		if ((c == NEW_ENV_VAR) || (c == ENV_USERVAR))
+			break;
+	    }
+	} else
+#endif
+	{
+#ifdef	ENV_HACK
+	    /*
+	     * We only want to do this if we haven't already decided
+	     * whether or not the other side has its VALUE and VAR
+	     * reversed.
+	     */
+	    if (env_ovar < 0) {
+		register int last = -1;		/* invalid value */
+		int empty = 0;
+		int got_var = 0, got_value = 0, got_uservar = 0;
+
+		/*
+		 * The other side might have its VALUE and VAR values
+		 * reversed.  To be interoperable, we need to determine
+		 * which way it is.  If the first recognized character
+		 * is a VAR or VALUE, then that will tell us what
+		 * type of client it is.  If the fist recognized
+		 * character is a USERVAR, then we continue scanning
+		 * the suboption looking for two consecutive
+		 * VAR or VALUE fields.  We should not get two
+		 * consecutive VALUE fields, so finding two
+		 * consecutive VALUE or VAR fields will tell us
+		 * what the client is.
+		 */
+		SB_SAVE();
+		while (!SB_EOF()) {
+			c = SB_GET();
+			switch(c) {
+			case OLD_ENV_VAR:
+				if (last < 0 || last == OLD_ENV_VAR
+				    || (empty && (last == OLD_ENV_VALUE)))
+					goto env_ovar_ok;
+				got_var++;
+				last = OLD_ENV_VAR;
+				break;
+			case OLD_ENV_VALUE:
+				if (last < 0 || last == OLD_ENV_VALUE
+				    || (empty && (last == OLD_ENV_VAR)))
+					goto env_ovar_wrong;
+				got_value++;
+				last = OLD_ENV_VALUE;
+				break;
+			case ENV_USERVAR:
+				/* count strings of USERVAR as one */
+				if (last != ENV_USERVAR)
+					got_uservar++;
+				if (empty) {
+					if (last == OLD_ENV_VALUE)
+						goto env_ovar_ok;
+					if (last == OLD_ENV_VAR)
+						goto env_ovar_wrong;
+				}
+				last = ENV_USERVAR;
+				break;
+			case ENV_ESC:
+				if (!SB_EOF())
+					c = SB_GET();
+				/* FALL THROUGH */
+			default:
+				empty = 0;
+				continue;
+			}
+			empty = 1;
+		}
+		if (empty) {
+			if (last == OLD_ENV_VALUE)
+				goto env_ovar_ok;
+			if (last == OLD_ENV_VAR)
+				goto env_ovar_wrong;
+		}
+		/*
+		 * Ok, the first thing was a USERVAR, and there
+		 * are not two consecutive VAR or VALUE commands,
+		 * and none of the VAR or VALUE commands are empty.
+		 * If the client has sent us a well-formed option,
+		 * then the number of VALUEs received should always
+		 * be less than or equal to the number of VARs and
+		 * USERVARs received.
+		 *
+		 * If we got exactly as many VALUEs as VARs and
+		 * USERVARs, the client has the same definitions.
+		 *
+		 * If we got exactly as many VARs as VALUEs and
+		 * USERVARS, the client has reversed definitions.
+		 */
+		if (got_uservar + got_var == got_value) {
+	    env_ovar_ok:
+			env_ovar = OLD_ENV_VAR;
+			env_ovalue = OLD_ENV_VALUE;
+		} else if (got_uservar + got_value == got_var) {
+	    env_ovar_wrong:
+			env_ovar = OLD_ENV_VALUE;
+			env_ovalue = OLD_ENV_VAR;
+			DIAG(TD_OPTIONS, {sprintf(nfrontp,
+				"ENVIRON VALUE and VAR are reversed!\r\n");
+				nfrontp += strlen(nfrontp);});
+
+		}
+	    }
+	    SB_RESTORE();
+#endif
+
+	    while (!SB_EOF()) {
+		c = SB_GET();
+		if ((c == env_ovar) || (c == ENV_USERVAR))
+			break;
+	    }
+	}
+
+	if (SB_EOF())
+		return;
+
+	cp = varp = (char *)subpointer;
+	valp = 0;
+
+	while (!SB_EOF()) {
+		c = SB_GET();
+		if (subchar == TELOPT_OLD_ENVIRON) {
+			if (c == env_ovar)
+				c = NEW_ENV_VAR;
+			else if (c == env_ovalue)
+				c = NEW_ENV_VALUE;
+		}
+		switch (c) {
+
+		case NEW_ENV_VALUE:
+			*cp = '\0';
+			cp = valp = (char *)subpointer;
+			break;
+
+		case NEW_ENV_VAR:
+		case ENV_USERVAR:
+			*cp = '\0';
+			if (valp)
+				(void)setenv(varp, valp, 1);
+			else
+				unsetenv(varp);
+			cp = varp = (char *)subpointer;
+			valp = 0;
+			break;
+
+		case ENV_ESC:
+			if (SB_EOF())
+				break;
+			c = SB_GET();
+			/* FALL THROUGH */
+		default:
+			*cp++ = c;
+			break;
+		}
+	}
+	*cp = '\0';
+	if (valp)
+		(void)setenv(varp, valp, 1);
+	else
+		unsetenv(varp);
+	break;
+    }  /* end of case TELOPT_NEW_ENVIRON */
+#if	defined(AUTHENTICATION)
+    case TELOPT_AUTHENTICATION:
+	if (SB_EOF())
+		break;
+	switch(SB_GET()) {
+	case TELQUAL_SEND:
+	case TELQUAL_REPLY:
+		/*
+		 * These are sent by us and cannot be sent by
+		 * the client.
+		 */
+		break;
+	case TELQUAL_IS:
+		auth_is(subpointer, SB_LEN());
+		break;
+	case TELQUAL_NAME:
+		auth_name(subpointer, SB_LEN());
+		break;
+	}
+	break;
+#endif
+#ifdef	ENCRYPTION
+    case TELOPT_ENCRYPT:
+	if (SB_EOF())
+		break;
+	switch(SB_GET()) {
+	case ENCRYPT_SUPPORT:
+		encrypt_support(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_IS:
+		encrypt_is(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_REPLY:
+		encrypt_reply(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_START:
+		encrypt_start(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_END:
+		encrypt_end();
+		break;
+	case ENCRYPT_REQSTART:
+		encrypt_request_start(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_REQEND:
+		/*
+		 * We can always send an REQEND so that we cannot
+		 * get stuck encrypting.  We should only get this
+		 * if we have been able to get in the correct mode
+		 * anyhow.
+		 */
+		encrypt_request_end();
+		break;
+	case ENCRYPT_ENC_KEYID:
+		encrypt_enc_keyid(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_DEC_KEYID:
+		encrypt_dec_keyid(subpointer, SB_LEN());
+		break;
+	default:
+		break;
+	}
+	break;
+#endif	/* ENCRYPTION */
+
+    default:
+	break;
+    }  /* end of switch */
+
+}  /* end of suboption */
+
+	void
+doclientstat()
+{
+	clientstat(TELOPT_LINEMODE, WILL, 0);
+}
+
+#define	ADD(c)	 *ncp++ = c
+#define	ADD_DATA(c) { *ncp++ = c; if (c == SE || c == IAC) *ncp++ = c; }
+	void
+send_status()
+{
+	unsigned char statusbuf[256];
+	register unsigned char *ncp;
+	register unsigned char i;
+
+	ncp = statusbuf;
+
+	netflush();	/* get rid of anything waiting to go out */
+
+	ADD(IAC);
+	ADD(SB);
+	ADD(TELOPT_STATUS);
+	ADD(TELQUAL_IS);
+
+	/*
+	 * We check the want_state rather than the current state,
+	 * because if we received a DO/WILL for an option that we
+	 * don't support, and the other side didn't send a DONT/WONT
+	 * in response to our WONT/DONT, then the "state" will be
+	 * WILL/DO, and the "want_state" will be WONT/DONT.  We
+	 * need to go by the latter.
+	 */
+	for (i = 0; i < (unsigned char)NTELOPTS; i++) {
+		if (my_want_state_is_will(i)) {
+			ADD(WILL);
+			ADD_DATA(i);
+		}
+		if (his_want_state_is_will(i)) {
+			ADD(DO);
+			ADD_DATA(i);
+		}
+	}
+
+	if (his_want_state_is_will(TELOPT_LFLOW)) {
+		ADD(SB);
+		ADD(TELOPT_LFLOW);
+		if (flowmode) {
+			ADD(LFLOW_ON);
+		} else {
+			ADD(LFLOW_OFF);
+		}
+		ADD(SE);
+
+		if (restartany >= 0) {
+			ADD(SB);
+			ADD(TELOPT_LFLOW);
+			if (restartany) {
+				ADD(LFLOW_RESTART_ANY);
+			} else {
+				ADD(LFLOW_RESTART_XON);
+			}
+			ADD(SE);
+		}
+	}
+
+#ifdef	LINEMODE
+	if (his_want_state_is_will(TELOPT_LINEMODE)) {
+		unsigned char *cp, *cpe;
+		int len;
+
+		ADD(SB);
+		ADD(TELOPT_LINEMODE);
+		ADD(LM_MODE);
+		ADD_DATA(editmode);
+		ADD(SE);
+
+		ADD(SB);
+		ADD(TELOPT_LINEMODE);
+		ADD(LM_SLC);
+		start_slc(0);
+		send_slc();
+		len = end_slc(&cp);
+		for (cpe = cp + len; cp < cpe; cp++)
+			ADD_DATA(*cp);
+		ADD(SE);
+	}
+#endif	/* LINEMODE */
+
+	ADD(IAC);
+	ADD(SE);
+
+	writenet(statusbuf, ncp - statusbuf);
+	netflush();	/* Send it on its way */
+
+	DIAG(TD_OPTIONS,
+		{printsub('>', statusbuf, ncp - statusbuf); netflush();});
+}
diff --git a/crypto/telnet/telnetd/telnetd.8 b/crypto/telnet/telnetd/telnetd.8
new file mode 100644
index 000000000000..e03f290daaa9
--- /dev/null
+++ b/crypto/telnet/telnetd/telnetd.8
@@ -0,0 +1,612 @@
+.\" Copyright (c) 1983, 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. 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.
+.\"
+.\"	@(#)telnetd.8	8.4 (Berkeley) 6/1/94
+.\"
+.Dd June 1, 1994
+.Dt TELNETD 8
+.Os BSD 4.2
+.Sh NAME
+.Nm telnetd
+.Nd DARPA
+.Tn TELNET
+protocol server
+.Sh SYNOPSIS
+.Nm /usr/libexec/telnetd
+.Op Fl BUhlkns
+.Op Fl D Ar debugmode
+.Op Fl I Ns Ar initid
+.Op Fl S Ar tos
+.Op Fl X Ar authtype
+.Op Fl a Ar authmode
+.Op Fl edebug
+.Op Fl p Ar loginprog
+.Op Fl r Ns Ar lowpty-highpty
+.Op Fl u Ar len
+.Op Fl debug Op Ar port
+.Sh DESCRIPTION
+The
+.Nm
+command is a server which supports the
+.Tn DARPA
+standard
+.Tn TELNET
+virtual terminal protocol.
+.Nm Telnetd
+is normally invoked by the internet server (see
+.Xr inetd 8 )
+for requests to connect to the
+.Tn TELNET
+port as indicated by the
+.Pa /etc/services
+file (see
+.Xr services 5 ).
+The
+.Fl debug
+option may be used to start up
+.Nm
+manually, instead of through
+.Xr inetd 8 .
+If started up this way, 
+.Ar port
+may be specified to run
+.Nm
+on an alternate
+.Tn TCP
+port number.
+.Pp
+The
+.Nm
+command accepts the following options:
+.Bl -tag -width indent
+.It Fl a Ar authmode
+This option may be used for specifying what mode should
+be used for authentication.
+Note that this option is only useful if
+.Nm
+has been compiled with support for the
+.Dv AUTHENTICATION
+option.
+There are several valid values for
+.Ar authmode :
+.Bl -tag -width debug
+.It Cm debug
+Turn on authentication debugging code.
+.It Cm user
+Only allow connections when the remote user
+can provide valid authentication information
+to identify the remote user,
+and is allowed access to the specified account
+without providing a password.
+.It Cm valid
+Only allow connections when the remote user
+can provide valid authentication information
+to identify the remote user.
+The
+.Xr login 1
+command will provide any additional user verification
+needed if the remote user is not allowed automatic
+access to the specified account.
+.It Cm other
+Only allow connections that supply some authentication information.
+This option is currently not supported
+by any of the existing authentication mechanisms,
+and is thus the same as specifying
+.Fl a
+.Cm valid .
+.It Cm none
+This is the default state.
+Authentication information is not required.
+If no or insufficient authentication information
+is provided, then the
+.Xr login 1
+program will provide the necessary user
+verification.
+.It Cm off
+Disable the authentication code.
+All user verification will happen through the
+.Xr login 1
+program.
+.El
+.It Fl B
+Specify bftp server mode.  In this mode,
+.Nm
+causes login to start a
+.Xr bftp 1
+session rather than the user's
+normal shell.  In bftp daemon mode normal
+logins are not supported, and it must be used
+on a port other than the normal
+.Tn TELNET
+port.
+.It Fl D Ar debugmode
+This option may be used for debugging purposes.
+This allows
+.Nm
+to print out debugging information
+to the connection, allowing the user to see what
+.Nm
+is doing.
+There are several possible values for 
+.Ar debugmode :
+.Bl -tag -width exercise
+.It Cm options
+Print information about the negotiation of
+.Tn TELNET
+options.
+.It Cm report
+Print the 
+.Cm options
+information, plus some additional information
+about what processing is going on.
+.It Cm netdata
+Display the data stream received by
+.Nm Ns .
+.It Cm ptydata
+Display data written to the pty.
+.It Cm exercise
+Has not been implemented yet.
+.El
+.It Fl debug
+Enable debugging on each socket created by
+.Nm
+(see
+.Dv SO_DEBUG
+in
+.Xr socket 2 ) .
+.It Fl edebug
+If
+.Nm
+has been compiled with support for data encryption, then the
+.Fl edebug
+option may be used to enable encryption debugging code.
+.It Fl p Ar loginprog
+Specify an alternate
+.Xr login 1
+command to run to complete the login.  The alternate command must
+understand the same command arguments as the standard login.
+.It Fl h
+Disable the printing of host-specific information before
+login has been completed.
+.It Fl I Ar initid
+This option is only applicable to
+.Tn UNICOS
+systems prior to 7.0.
+It specifies the
+.Dv ID
+from
+.Pa /etc/inittab
+to use when init starts login sessions.  The default
+.Dv ID
+is
+.Dv fe.
+.It Fl k
+This option is only useful if
+.Nm
+has been compiled with both linemode and kludge linemode
+support.  If the
+.Fl k
+option is specified, then if the remote client does not
+support the
+.Dv LINEMODE
+option, then
+.Nm
+will operate in character at a time mode.
+It will still support kludge linemode, but will only
+go into kludge linemode if the remote client requests
+it.
+(This is done by the client sending
+.Dv DONT SUPPRESS-GO-AHEAD
+and
+.Dv DONT ECHO . )
+The
+.Fl k
+option is most useful when there are remote clients
+that do not support kludge linemode, but pass the heuristic
+(if they respond with
+.Dv WILL TIMING-MARK
+in response to a
+.Dv DO TIMING-MARK)
+for kludge linemode support.
+.It Fl l
+Specify line mode. Try to force clients to use line-
+at-a-time mode.
+If the
+.Dv LINEMODE
+option is not supported, it will go
+into kludge linemode.
+.It Fl n
+Disable
+.Dv TCP
+keep-alives.  Normally
+.Nm
+enables the
+.Tn TCP
+keep-alive mechanism to probe connections that
+have been idle for some period of time to determine
+if the client is still there, so that idle connections
+from machines that have crashed or can no longer
+be reached may be cleaned up.
+.It Fl r Ar lowpty-highpty
+This option is only enabled when
+.Nm
+is compiled for
+.Dv UNICOS.
+It specifies an inclusive range of pseudo-terminal devices to
+use.  If the system has sysconf variable
+.Dv _SC_CRAY_NPTY
+configured, the default pty search range is 0 to
+.Dv _SC_CRAY_NPTY;
+otherwise, the default range is 0 to 128.  Either
+.Ar lowpty
+or
+.Ar highpty
+may be omitted to allow changing
+either end of the search range.  If
+.Ar lowpty
+is omitted, the - character is still required so that
+.Nm
+can differentiate
+.Ar highpty
+from
+.Ar lowpty .
+.It Fl s
+This option is only enabled if
+.Nm
+is compiled with support for
+.Tn SecurID
+cards.
+It causes the
+.Fl s
+option to be passed on to
+.Xr login 1 ,
+and thus is only useful if
+.Xr login 1
+supports the
+.Fl s
+flag to indicate that only
+.Tn SecurID
+validated logins are allowed, and is
+usually useful for controlling remote logins
+from outside of a firewall.
+.It Fl S Ar tos
+.It Fl u Ar len
+This option is used to specify the size of the field
+in the
+.Dv utmp
+structure that holds the remote host name.
+If the resolved host name is longer than
+.Ar len ,
+the dotted decimal value will be used instead.
+This allows hosts with very long host names that
+overflow this field to still be uniquely identified.
+Specifying
+.Fl u0
+indicates that only dotted decimal addresses
+should be put into the
+.Pa utmp
+file.
+.ne 1i
+.It Fl U
+This option causes
+.Nm
+to refuse connections from addresses that
+cannot be mapped back into a symbolic name
+via the
+.Xr gethostbyaddr 3
+routine.
+.It Fl X Ar authtype
+This option is only valid if
+.Nm
+has been built with support for the authentication option.
+It disables the use of
+.Ar authtype
+authentication, and
+can be used to temporarily disable
+a specific authentication type without having to recompile
+.Nm Ns .
+.El
+.Pp
+.Nm Telnetd
+operates by allocating a pseudo-terminal device (see
+.Xr pty 4 )
+for a client, then creating a login process which has
+the slave side of the pseudo-terminal as 
+.Dv stdin ,
+.Dv stdout
+and
+.Dv stderr .
+.Nm Telnetd
+manipulates the master side of the pseudo-terminal,
+implementing the
+.Tn TELNET
+protocol and passing characters
+between the remote client and the login process.
+.Pp
+When a
+.Tn TELNET
+session is started up, 
+.Nm
+sends
+.Tn TELNET
+options to the client side indicating
+a willingness to do the
+following
+.Tn TELNET
+options, which are described in more detail below:
+.Bd -literal -offset indent
+DO AUTHENTICATION
+WILL ENCRYPT
+DO TERMINAL TYPE
+DO TSPEED
+DO XDISPLOC
+DO NEW-ENVIRON
+DO ENVIRON
+WILL SUPPRESS GO AHEAD
+DO ECHO
+DO LINEMODE
+DO NAWS
+WILL STATUS
+DO LFLOW
+DO TIMING-MARK
+.Ed
+.Pp
+The pseudo-terminal allocated to the client is configured
+to operate in \*(lqcooked\*(rq mode, and with
+.Dv XTABS and
+.Dv CRMOD
+enabled (see
+.Xr tty 4 ) .
+.Pp
+.Nm Telnetd
+has support for enabling locally the following
+.Tn TELNET
+options:
+.Bl -tag -width "DO AUTHENTICATION"
+.It "WILL ECHO"
+When the
+.Dv LINEMODE
+option is enabled, a
+.Dv WILL ECHO
+or
+.Dv WONT ECHO
+will be sent to the client to indicate the
+current state of terminal echoing.
+When terminal echo is not desired, a
+.Dv WILL ECHO
+is sent to indicate that
+.Nm
+will take care of echoing any data that needs to be
+echoed to the terminal, and then nothing is echoed.
+When terminal echo is desired, a
+.Dv WONT ECHO
+is sent to indicate that
+.Nm
+will not be doing any terminal echoing, so the
+client should do any terminal echoing that is needed.
+.It "WILL BINARY"
+Indicate that the client is willing to send a
+8 bits of data, rather than the normal 7 bits
+of the Network Virtual Terminal.
+.It "WILL SGA"
+Indicate that it will not be sending
+.Dv IAC GA,
+go ahead, commands.
+.It "WILL STATUS"
+Indicate a willingness to send the client, upon
+request, of the current status of all
+.Tn TELNET
+options.
+.It "WILL TIMING-MARK"
+Whenever a
+.Dv DO TIMING-MARK
+command is received, it is always responded
+to with a
+.Dv WILL TIMING-MARK
+.ne 1i
+.It "WILL LOGOUT"
+When a
+.Dv DO LOGOUT
+is received, a
+.Dv WILL LOGOUT
+is sent in response, and the
+.Tn TELNET
+session is shut down.
+.It "WILL ENCRYPT"
+Only sent if
+.Nm
+is compiled with support for data encryption, and
+indicates a willingness to decrypt
+the data stream.
+.El
+.Pp
+.Nm Telnetd
+has support for enabling remotely the following
+.Tn TELNET
+options:
+.Bl -tag -width "DO AUTHENTICATION"
+.It "DO BINARY"
+Sent to indicate that
+.Nm
+is willing to receive an 8 bit data stream.
+.It "DO LFLOW"
+Requests that the client handle flow control
+characters remotely.
+.It "DO ECHO"
+This is not really supported, but is sent to identify a 4.2BSD
+.Xr telnet 1
+client, which will improperly respond with
+.Dv WILL ECHO.
+If a
+.Dv WILL ECHO
+is received, a
+.Dv DONT ECHO
+will be sent in response.
+.It "DO TERMINAL-TYPE"
+Indicate a desire to be able to request the
+name of the type of terminal that is attached
+to the client side of the connection.
+.It "DO SGA"
+Indicate that it does not need to receive
+.Dv IAC GA,
+the go ahead command.
+.It "DO NAWS"
+Requests that the client inform the server when
+the window (display) size changes.
+.It "DO TERMINAL-SPEED"
+Indicate a desire to be able to request information
+about the speed of the serial line to which
+the client is attached.
+.It "DO XDISPLOC"
+Indicate a desire to be able to request the name
+of the X Window System display that is associated with
+the telnet client.
+.It "DO NEW-ENVIRON"
+Indicate a desire to be able to request environment
+variable information, as described in RFC 1572.
+.It "DO ENVIRON"
+Indicate a desire to be able to request environment
+variable information, as described in RFC 1408.
+.It "DO LINEMODE"
+Only sent if
+.Nm
+is compiled with support for linemode, and
+requests that the client do line by line processing.
+.It "DO TIMING-MARK"
+Only sent if
+.Nm
+is compiled with support for both linemode and
+kludge linemode, and the client responded with
+.Dv WONT LINEMODE.
+If the client responds with
+.Dv WILL TM,
+the it is assumed that the client supports
+kludge linemode.
+Note that the
+.Op Fl k
+option can be used to disable this.
+.It "DO AUTHENTICATION"
+Only sent if
+.Nm
+is compiled with support for authentication, and
+indicates a willingness to receive authentication
+information for automatic login.
+.It "DO ENCRYPT"
+Only sent if
+.Nm
+is compiled with support for data encryption, and
+indicates a willingness to decrypt
+the data stream.
+.Sh ENVIRONMENT
+.Sh FILES
+.Bl -tag -width /usr/ucb/bftp -compact
+.It Pa /etc/services
+.It Pa /etc/inittab
+(UNICOS systems only)
+.It Pa /etc/iptos
+(if supported)
+.It Pa /usr/ucb/bftp
+(if supported)
+.El
+.Sh "SEE ALSO"
+.Xr bftp 1 ,
+.Xr login 1 ,
+.Xr telnet 1
+(if supported)
+.Sh STANDARDS
+.Bl -tag -compact -width RFC-1572
+.It Cm RFC-854
+.Tn TELNET
+PROTOCOL SPECIFICATION
+.It Cm RFC-855
+TELNET OPTION SPECIFICATIONS
+.It Cm RFC-856
+TELNET BINARY TRANSMISSION
+.It Cm RFC-857
+TELNET ECHO OPTION
+.It Cm RFC-858
+TELNET SUPPRESS GO AHEAD OPTION
+.It Cm RFC-859
+TELNET STATUS OPTION
+.It Cm RFC-860
+TELNET TIMING MARK OPTION
+.It Cm RFC-861
+TELNET EXTENDED OPTIONS - LIST OPTION
+.It Cm RFC-885
+TELNET END OF RECORD OPTION
+.It Cm RFC-1073
+Telnet Window Size Option
+.It Cm RFC-1079
+Telnet Terminal Speed Option
+.It Cm RFC-1091
+Telnet Terminal-Type Option
+.It Cm RFC-1096
+Telnet X Display Location Option
+.It Cm RFC-1123
+Requirements for Internet Hosts -- Application and Support
+.It Cm RFC-1184
+Telnet Linemode Option
+.It Cm RFC-1372
+Telnet Remote Flow Control Option
+.It Cm RFC-1416
+Telnet Authentication Option
+.It Cm RFC-1411
+Telnet Authentication: Kerberos Version 4
+.It Cm RFC-1412
+Telnet Authentication: SPX
+.It Cm RFC-1571
+Telnet Environment Option Interoperability Issues
+.It Cm RFC-1572
+Telnet Environment Option
+.Sh BUGS
+Some
+.Tn TELNET
+commands are only partially implemented.
+.Pp
+Because of bugs in the original 4.2 BSD
+.Xr telnet 1 ,
+.Nm
+performs some dubious protocol exchanges to try to discover if the remote
+client is, in fact, a 4.2 BSD
+.Xr telnet 1 .
+.Pp
+Binary mode
+has no common interpretation except between similar operating systems
+(Unix in this case).
+.Pp
+The terminal type name received from the remote client is converted to
+lower case.
+.Pp
+.Nm Telnetd
+never sends
+.Tn TELNET
+.Dv IAC GA
+(go ahead) commands.
diff --git a/crypto/telnet/telnetd/telnetd.c b/crypto/telnet/telnetd/telnetd.c
new file mode 100644
index 000000000000..f6eb9fb0fdb7
--- /dev/null
+++ b/crypto/telnet/telnetd/telnetd.c
@@ -0,0 +1,1618 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. 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.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1989, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static const char sccsid[] = "@(#)telnetd.c	8.4 (Berkeley) 5/30/95";
+#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
+
+#include "telnetd.h"
+#include "pathnames.h"
+
+#if	defined(_SC_CRAY_SECURE_SYS) && !defined(SCM_SECURITY)
+/*
+ * UNICOS 6.0/6.1 do not have SCM_SECURITY defined, so we can
+ * use it to tell us to turn off all the socket security code,
+ * since that is only used in UNICOS 7.0 and later.
+ */
+# undef _SC_CRAY_SECURE_SYS
+#endif
+
+#include <err.h>
+#include <arpa/inet.h>
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+#include <sys/sysv.h>
+#include <sys/secdev.h>
+# ifdef SO_SEC_MULTI		/* 8.0 code */
+#include <sys/secparm.h>
+#include <sys/usrv.h>
+# endif /* SO_SEC_MULTI */
+int	secflag;
+char	tty_dev[16];
+struct	secdev dv;
+struct	sysv sysv;
+# ifdef SO_SEC_MULTI		/* 8.0 code */
+struct	socksec ss;
+# else /* SO_SEC_MULTI */	/* 7.0 code */
+struct	socket_security ss;
+# endif /* SO_SEC_MULTI */
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+#if	defined(AUTHENTICATION)
+#include <libtelnet/auth.h>
+int	auth_level = 0;
+#endif
+#if	defined(ENCRYPTION)
+#include <libtelnet/encrypt.h>
+#endif
+#include <libtelnet/misc.h>
+#if	defined(SecurID)
+int	require_SecurID = 0;
+#endif
+
+extern	int utmp_len;
+int	registerd_host_only = 0;
+
+#ifdef	STREAMSPTY
+# include <stropts.h>
+# include <termio.h>
+/* make sure we don't get the bsd version */
+# include "/usr/include/sys/tty.h"
+# include <sys/ptyvar.h>
+
+/*
+ * Because of the way ptyibuf is used with streams messages, we need
+ * ptyibuf+1 to be on a full-word boundary.  The following wierdness
+ * is simply to make that happen.
+ */
+long	ptyibufbuf[BUFSIZ/sizeof(long)+1];
+char	*ptyibuf = ((char *)&ptyibufbuf[1])-1;
+char	*ptyip = ((char *)&ptyibufbuf[1])-1;
+char	ptyibuf2[BUFSIZ];
+unsigned char ctlbuf[BUFSIZ];
+struct	strbuf strbufc, strbufd;
+
+#else	/* ! STREAMPTY */
+
+/*
+ * I/O data buffers,
+ * pointers, and counters.
+ */
+char	ptyibuf[BUFSIZ], *ptyip = ptyibuf;
+char	ptyibuf2[BUFSIZ];
+
+# include <termcap.h>
+
+int readstream(int p, char *ibuf, int bufsize);
+void doit(struct sockaddr_in *who);
+int terminaltypeok(char *s);
+void startslave(char *host, int autologin, char *autoname);
+
+#endif /* ! STREAMPTY */
+
+int	hostinfo = 1;			/* do we print login banner? */
+
+#ifdef	CRAY
+extern int      newmap; /* nonzero if \n maps to ^M^J */
+int	lowpty = 0, highpty;	/* low, high pty numbers */
+#endif /* CRAY */
+
+int debug = 0;
+int keepalive = 1;
+char *altlogin;
+
+void doit __P((struct sockaddr_in *));
+int terminaltypeok __P((char *));
+void startslave __P((char *, int, char *));
+extern void usage P((void));
+
+/*
+ * The string to pass to getopt().  We do it this way so
+ * that only the actual options that we support will be
+ * passed off to getopt().
+ */
+char valid_opts[] = {
+	'd', ':', 'h', 'k', 'n', 'p', ':', 'S', ':', 'u', ':', 'U',
+#ifdef	AUTHENTICATION
+	'a', ':', 'X', ':',
+#endif
+#ifdef BFTPDAEMON
+	'B',
+#endif
+#ifdef DIAGNOSTICS
+	'D', ':',
+#endif
+#ifdef	ENCRYPTION
+	'e', ':',
+#endif
+#if	defined(CRAY) && defined(NEWINIT)
+	'I', ':',
+#endif
+#ifdef	LINEMODE
+	'l',
+#endif
+#ifdef CRAY
+	'r', ':',
+#endif
+#ifdef	SecurID
+	's',
+#endif
+	'\0'
+};
+
+	int
+main(argc, argv)
+	char *argv[];
+{
+	struct sockaddr_in from;
+	int on = 1, fromlen;
+	register int ch;
+#if	defined(IPPROTO_IP) && defined(IP_TOS)
+	int tos = -1;
+#endif
+
+	pfrontp = pbackp = ptyobuf;
+	netip = netibuf;
+	nfrontp = nbackp = netobuf;
+#ifdef	ENCRYPTION
+	nclearto = 0;
+#endif	/* ENCRYPTION */
+
+	/*
+	 * This initialization causes linemode to default to a configuration
+	 * that works on all telnet clients, including the FreeBSD client.
+	 * This is not quite the same as the telnet client issuing a "mode
+	 * character" command, but has most of the same benefits, and is
+	 * preferable since some clients (like usofts) don't have the
+	 * mode character command anyway and linemode breaks things.
+	 * The most notable symptom of fix is that csh "set filec" operations
+	 * like <ESC> (filename completion) and ^D (choices) keys now work
+	 * in telnet sessions and can be used more than once on the same line.
+	 * CR/LF handling is also corrected in some termio modes.  This 
+	 * change resolves problem reports bin/771 and bin/1037.
+	 */
+
+	linemode=1;	/*Default to mode that works on bulk of clients*/
+
+#ifdef CRAY
+	/*
+	 * Get number of pty's before trying to process options,
+	 * which may include changing pty range.
+	 */
+	highpty = getnpty();
+#endif /* CRAY */
+
+	while ((ch = getopt(argc, argv, valid_opts)) != -1) {
+		switch(ch) {
+
+#ifdef	AUTHENTICATION
+		case 'a':
+			/*
+			 * Check for required authentication level
+			 */
+			if (strcmp(optarg, "debug") == 0) {
+				extern int auth_debug_mode;
+				auth_debug_mode = 1;
+			} else if (strcasecmp(optarg, "none") == 0) {
+				auth_level = 0;
+			} else if (strcasecmp(optarg, "other") == 0) {
+				auth_level = AUTH_OTHER;
+			} else if (strcasecmp(optarg, "user") == 0) {
+				auth_level = AUTH_USER;
+			} else if (strcasecmp(optarg, "valid") == 0) {
+				auth_level = AUTH_VALID;
+			} else if (strcasecmp(optarg, "off") == 0) {
+				/*
+				 * This hack turns off authentication
+				 */
+				auth_level = -1;
+			} else {
+				warnx("unknown authorization level for -a");
+			}
+			break;
+#endif	/* AUTHENTICATION */
+
+#ifdef BFTPDAEMON
+		case 'B':
+			bftpd++;
+			break;
+#endif /* BFTPDAEMON */
+
+		case 'd':
+			if (strcmp(optarg, "ebug") == 0) {
+				debug++;
+				break;
+			}
+			usage();
+			/* NOTREACHED */
+			break;
+
+#ifdef DIAGNOSTICS
+		case 'D':
+			/*
+			 * Check for desired diagnostics capabilities.
+			 */
+			if (!strcmp(optarg, "report")) {
+				diagnostic |= TD_REPORT|TD_OPTIONS;
+			} else if (!strcmp(optarg, "exercise")) {
+				diagnostic |= TD_EXERCISE;
+			} else if (!strcmp(optarg, "netdata")) {
+				diagnostic |= TD_NETDATA;
+			} else if (!strcmp(optarg, "ptydata")) {
+				diagnostic |= TD_PTYDATA;
+			} else if (!strcmp(optarg, "options")) {
+				diagnostic |= TD_OPTIONS;
+			} else {
+				usage();
+				/* NOT REACHED */
+			}
+			break;
+#endif /* DIAGNOSTICS */
+
+#ifdef	ENCRYPTION
+		case 'e':
+			if (strcmp(optarg, "debug") == 0) {
+				extern int encrypt_debug_mode;
+				encrypt_debug_mode = 1;
+				break;
+			}
+			usage();
+			/* NOTREACHED */
+			break;
+#endif	/* ENCRYPTION */
+
+		case 'h':
+			hostinfo = 0;
+			break;
+
+#if	defined(CRAY) && defined(NEWINIT)
+		case 'I':
+		    {
+			extern char *gen_id;
+			gen_id = optarg;
+			break;
+		    }
+#endif	/* defined(CRAY) && defined(NEWINIT) */
+
+#ifdef	LINEMODE
+		case 'l':
+			alwayslinemode = 1;
+			break;
+#endif	/* LINEMODE */
+
+		case 'k':
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			lmodetype = NO_AUTOKLUDGE;
+#else
+			/* ignore -k option if built without kludge linemode */
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			break;
+
+		case 'n':
+			keepalive = 0;
+			break;
+
+		case 'p':
+			altlogin = optarg;
+			break;
+
+#ifdef CRAY
+		case 'r':
+		    {
+			char *strchr();
+			char *c;
+
+			/*
+			 * Allow the specification of alterations
+			 * to the pty search range.  It is legal to
+			 * specify only one, and not change the
+			 * other from its default.
+			 */
+			c = strchr(optarg, '-');
+			if (c) {
+				*c++ = '\0';
+				highpty = atoi(c);
+			}
+			if (*optarg != '\0')
+				lowpty = atoi(optarg);
+			if ((lowpty > highpty) || (lowpty < 0) ||
+							(highpty > 32767)) {
+				usage();
+				/* NOT REACHED */
+			}
+			break;
+		    }
+#endif	/* CRAY */
+
+#ifdef	SecurID
+		case 's':
+			/* SecurID required */
+			require_SecurID = 1;
+			break;
+#endif	/* SecurID */
+		case 'S':
+#ifdef	HAS_GETTOS
+			if ((tos = parsetos(optarg, "tcp")) < 0)
+				warnx("%s%s%s",
+					"bad TOS argument '", optarg,
+					"'; will try to use default TOS");
+#else
+			warnx("TOS option unavailable; -S flag not supported");
+#endif
+			break;
+
+		case 'u':
+			utmp_len = atoi(optarg);
+			break;
+
+		case 'U':
+			registerd_host_only = 1;
+			break;
+
+#ifdef	AUTHENTICATION
+		case 'X':
+			/*
+			 * Check for invalid authentication types
+			 */
+			auth_disable_name(optarg);
+			break;
+#endif	/* AUTHENTICATION */
+
+		default:
+			warnx("%c: unknown option", ch);
+			/* FALLTHROUGH */
+		case '?':
+			usage();
+			/* NOTREACHED */
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (debug) {
+	    int s, ns, foo;
+	    struct servent *sp;
+	    static struct sockaddr_in sin = { AF_INET };
+
+	    if (argc > 1) {
+		usage();
+		/* NOT REACHED */
+	    } else if (argc == 1) {
+		    if ((sp = getservbyname(*argv, "tcp"))) {
+			sin.sin_port = sp->s_port;
+		    } else {
+			sin.sin_port = atoi(*argv);
+			if ((int)sin.sin_port <= 0) {
+			    warnx("%s: bad port #", *argv);
+			    usage();
+			    /* NOT REACHED */
+			}
+			sin.sin_port = htons((u_short)sin.sin_port);
+		   }
+	    } else {
+		sp = getservbyname("telnet", "tcp");
+		if (sp == 0)
+		    errx(1, "tcp/telnet: unknown service");
+		sin.sin_port = sp->s_port;
+	    }
+
+	    s = socket(AF_INET, SOCK_STREAM, 0);
+	    if (s < 0)
+		    err(1, "socket");
+	    (void) setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
+				(char *)&on, sizeof(on));
+	    if (bind(s, (struct sockaddr *)&sin, sizeof sin) < 0)
+		err(1, "bind");
+	    if (listen(s, 1) < 0)
+		err(1, "listen");
+	    foo = sizeof sin;
+	    ns = accept(s, (struct sockaddr *)&sin, &foo);
+	    if (ns < 0)
+		err(1, "accept");
+	    (void) dup2(ns, 0);
+	    (void) close(ns);
+	    (void) close(s);
+#ifdef convex
+	} else if (argc == 1) {
+		; /* VOID*/		/* Just ignore the host/port name */
+#endif
+	} else if (argc > 0) {
+		usage();
+		/* NOT REACHED */
+	}
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+	secflag = sysconf(_SC_CRAY_SECURE_SYS);
+
+	/*
+	 *	Get socket's security label
+	 */
+	if (secflag)  {
+		int szss = sizeof(ss);
+#ifdef SO_SEC_MULTI			/* 8.0 code */
+		int sock_multi;
+		int szi = sizeof(int);
+#endif /* SO_SEC_MULTI */
+
+		memset((char *)&dv, 0, sizeof(dv));
+
+		if (getsysv(&sysv, sizeof(struct sysv)) != 0)
+			err(1, "getsysv");
+
+		/*
+		 *	Get socket security label and set device values
+		 *	   {security label to be set on ttyp device}
+		 */
+#ifdef SO_SEC_MULTI			/* 8.0 code */
+		if ((getsockopt(0, SOL_SOCKET, SO_SECURITY,
+			       (char *)&ss, &szss) < 0) ||
+		    (getsockopt(0, SOL_SOCKET, SO_SEC_MULTI,
+				(char *)&sock_multi, &szi) < 0)) {
+			err(1, "getsockopt");
+		} else {
+			dv.dv_actlvl = ss.ss_actlabel.lt_level;
+			dv.dv_actcmp = ss.ss_actlabel.lt_compart;
+			if (!sock_multi) {
+				dv.dv_minlvl = dv.dv_maxlvl = dv.dv_actlvl;
+				dv.dv_valcmp = dv.dv_actcmp;
+			} else {
+				dv.dv_minlvl = ss.ss_minlabel.lt_level;
+				dv.dv_maxlvl = ss.ss_maxlabel.lt_level;
+				dv.dv_valcmp = ss.ss_maxlabel.lt_compart;
+			}
+			dv.dv_devflg = 0;
+		}
+#else /* SO_SEC_MULTI */		/* 7.0 code */
+		if (getsockopt(0, SOL_SOCKET, SO_SECURITY,
+				(char *)&ss, &szss) >= 0) {
+			dv.dv_actlvl = ss.ss_slevel;
+			dv.dv_actcmp = ss.ss_compart;
+			dv.dv_minlvl = ss.ss_minlvl;
+			dv.dv_maxlvl = ss.ss_maxlvl;
+			dv.dv_valcmp = ss.ss_maxcmp;
+		}
+#endif /* SO_SEC_MULTI */
+	}
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+	openlog("telnetd", LOG_PID | LOG_ODELAY, LOG_DAEMON);
+	fromlen = sizeof (from);
+	if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
+		warn("getpeername");
+		_exit(1);
+	}
+	if (keepalive &&
+	    setsockopt(0, SOL_SOCKET, SO_KEEPALIVE,
+			(char *)&on, sizeof (on)) < 0) {
+		syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
+	}
+
+#if	defined(IPPROTO_IP) && defined(IP_TOS)
+	{
+# if	defined(HAS_GETTOS)
+		struct tosent *tp;
+		if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
+			tos = tp->t_tos;
+# endif
+		if (tos < 0)
+			tos = 020;	/* Low Delay bit */
+		if (tos
+		   && (setsockopt(0, IPPROTO_IP, IP_TOS,
+				  (char *)&tos, sizeof(tos)) < 0)
+		   && (errno != ENOPROTOOPT) )
+			syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
+	}
+#endif	/* defined(IPPROTO_IP) && defined(IP_TOS) */
+	net = 0;
+	doit(&from);
+	/* NOTREACHED */
+	return(0);
+}  /* end of main */
+
+	void
+usage()
+{
+	fprintf(stderr, "usage: telnetd");
+#ifdef	AUTHENTICATION
+	fprintf(stderr, " [-a (debug|other|user|valid|off|none)]\n\t");
+#endif
+#ifdef BFTPDAEMON
+	fprintf(stderr, " [-B]");
+#endif
+	fprintf(stderr, " [-debug]");
+#ifdef DIAGNOSTICS
+	fprintf(stderr, " [-D (options|report|exercise|netdata|ptydata)]\n\t");
+#endif
+#ifdef	AUTHENTICATION
+	fprintf(stderr, " [-edebug]");
+#endif
+	fprintf(stderr, " [-h]");
+#if	defined(CRAY) && defined(NEWINIT)
+	fprintf(stderr, " [-Iinitid]");
+#endif
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+	fprintf(stderr, " [-k]");
+#endif
+#ifdef LINEMODE
+	fprintf(stderr, " [-l]");
+#endif
+	fprintf(stderr, " [-n]");
+#ifdef	CRAY
+	fprintf(stderr, " [-r[lowpty]-[highpty]]");
+#endif
+	fprintf(stderr, "\n\t");
+#ifdef	SecurID
+	fprintf(stderr, " [-s]");
+#endif
+#ifdef	HAS_GETTOS
+	fprintf(stderr, " [-S tos]");
+#endif
+#ifdef	AUTHENTICATION
+	fprintf(stderr, " [-X auth-type]");
+#endif
+	fprintf(stderr, " [-u utmp_hostname_length] [-U]");
+	fprintf(stderr, " [port]\n");
+	exit(1);
+}
+
+/*
+ * getterminaltype
+ *
+ *	Ask the other end to send along its terminal type and speed.
+ * Output is the variable terminaltype filled in.
+ */
+static unsigned char ttytype_sbbuf[] = {
+	IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE
+};
+
+    int
+getterminaltype(name)
+    char *name;
+{
+    int retval = -1;
+    void _gettermname();
+
+    settimer(baseline);
+#if	defined(AUTHENTICATION)
+    /*
+     * Handle the Authentication option before we do anything else.
+     */
+    send_do(TELOPT_AUTHENTICATION, 1);
+    while (his_will_wont_is_changing(TELOPT_AUTHENTICATION))
+	ttloop();
+    if (his_state_is_will(TELOPT_AUTHENTICATION)) {
+	retval = auth_wait(name);
+    }
+#endif
+
+#ifdef	ENCRYPTION
+    send_will(TELOPT_ENCRYPT, 1);
+#endif	/* ENCRYPTION */
+    send_do(TELOPT_TTYPE, 1);
+    send_do(TELOPT_TSPEED, 1);
+    send_do(TELOPT_XDISPLOC, 1);
+    send_do(TELOPT_NEW_ENVIRON, 1);
+    send_do(TELOPT_OLD_ENVIRON, 1);
+    while (
+#ifdef	ENCRYPTION
+	   his_do_dont_is_changing(TELOPT_ENCRYPT) ||
+#endif	/* ENCRYPTION */
+	   his_will_wont_is_changing(TELOPT_TTYPE) ||
+	   his_will_wont_is_changing(TELOPT_TSPEED) ||
+	   his_will_wont_is_changing(TELOPT_XDISPLOC) ||
+	   his_will_wont_is_changing(TELOPT_NEW_ENVIRON) ||
+	   his_will_wont_is_changing(TELOPT_OLD_ENVIRON)) {
+	ttloop();
+    }
+#ifdef	ENCRYPTION
+    /*
+     * Wait for the negotiation of what type of encryption we can
+     * send with.  If autoencrypt is not set, this will just return.
+     */
+    if (his_state_is_will(TELOPT_ENCRYPT)) {
+	encrypt_wait();
+    }
+#endif	/* ENCRYPTION */
+    if (his_state_is_will(TELOPT_TSPEED)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    if (his_state_is_will(TELOPT_XDISPLOC)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    if (his_state_is_will(TELOPT_NEW_ENVIRON)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_NEW_ENVIRON, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    else if (his_state_is_will(TELOPT_OLD_ENVIRON)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_OLD_ENVIRON, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    if (his_state_is_will(TELOPT_TTYPE)) {
+
+	memmove(nfrontp, ttytype_sbbuf, sizeof ttytype_sbbuf);
+	nfrontp += sizeof ttytype_sbbuf;
+	DIAG(TD_OPTIONS, printsub('>', ttytype_sbbuf + 2,
+					sizeof ttytype_sbbuf - 2););
+    }
+    if (his_state_is_will(TELOPT_TSPEED)) {
+	while (sequenceIs(tspeedsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_XDISPLOC)) {
+	while (sequenceIs(xdisplocsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_NEW_ENVIRON)) {
+	while (sequenceIs(environsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_OLD_ENVIRON)) {
+	while (sequenceIs(oenvironsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_TTYPE)) {
+	char first[256], last[256];
+
+	while (sequenceIs(ttypesubopt, baseline))
+	    ttloop();
+
+	/*
+	 * If the other side has already disabled the option, then
+	 * we have to just go with what we (might) have already gotten.
+	 */
+	if (his_state_is_will(TELOPT_TTYPE) && !terminaltypeok(terminaltype)) {
+	    (void) strncpy(first, terminaltype, sizeof(first)-1);
+	    first[sizeof(first)-1] = '\0';
+	    for(;;) {
+		/*
+		 * Save the unknown name, and request the next name.
+		 */
+		(void) strncpy(last, terminaltype, sizeof(last)-1);
+		last[sizeof(last)-1] = '\0';
+		_gettermname();
+		if (terminaltypeok(terminaltype))
+		    break;
+		if ((strncmp(last, terminaltype, sizeof(last)) == 0) ||
+		    his_state_is_wont(TELOPT_TTYPE)) {
+		    /*
+		     * We've hit the end.  If this is the same as
+		     * the first name, just go with it.
+		     */
+		    if (strncmp(first, terminaltype, sizeof(first)) == 0)
+			break;
+		    /*
+		     * Get the terminal name one more time, so that
+		     * RFC1091 compliant telnets will cycle back to
+		     * the start of the list.
+		     */
+		     _gettermname();
+		    if (strncmp(first, terminaltype, sizeof(first)) != 0) {
+			(void) strncpy(terminaltype, first, sizeof(terminaltype)-1);
+			terminaltype[sizeof(terminaltype)-1] = '\0';
+		    }
+		    break;
+		}
+	    }
+	}
+    }
+    return(retval);
+}  /* end of getterminaltype */
+
+    void
+_gettermname()
+{
+    /*
+     * If the client turned off the option,
+     * we can't send another request, so we
+     * just return.
+     */
+    if (his_state_is_wont(TELOPT_TTYPE))
+	return;
+    settimer(baseline);
+    memmove(nfrontp, ttytype_sbbuf, sizeof ttytype_sbbuf);
+    nfrontp += sizeof ttytype_sbbuf;
+    DIAG(TD_OPTIONS, printsub('>', ttytype_sbbuf + 2,
+					sizeof ttytype_sbbuf - 2););
+    while (sequenceIs(ttypesubopt, baseline))
+	ttloop();
+}
+
+    int
+terminaltypeok(s)
+    char *s;
+{
+    char buf[1024];
+
+    if (terminaltype == NULL)
+	return(1);
+
+    /*
+     * tgetent() will return 1 if the type is known, and
+     * 0 if it is not known.  If it returns -1, it couldn't
+     * open the database.  But if we can't open the database,
+     * it won't help to say we failed, because we won't be
+     * able to verify anything else.  So, we treat -1 like 1.
+     */
+    if (tgetent(buf, s) == 0)
+	return(0);
+    return(1);
+}
+
+#ifndef	MAXHOSTNAMELEN
+#define	MAXHOSTNAMELEN 64
+#endif	/* MAXHOSTNAMELEN */
+
+char *hostname;
+char host_name[MAXHOSTNAMELEN];
+char remote_host_name[MAXHOSTNAMELEN];
+
+extern void telnet P((int, int, char *));
+
+int level;
+char user_name[256];
+/*
+ * Get a pty, scan input lines.
+ */
+	void
+doit(who)
+	struct sockaddr_in *who;
+{
+	char *host = NULL;
+	struct hostent *hp;
+	int ptynum;
+
+	/*
+	 * Find an available pty to use.
+	 */
+#ifndef	convex
+	pty = getpty(&ptynum);
+	if (pty < 0)
+		fatal(net, "All network ports in use");
+#else
+	for (;;) {
+		char *lp;
+		extern char *line, *getpty();
+
+		if ((lp = getpty()) == NULL)
+			fatal(net, "Out of ptys");
+
+		if ((pty = open(lp, 2)) >= 0) {
+			strcpy(line,lp);
+			line[5] = 't';
+			break;
+		}
+	}
+#endif
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+	/*
+	 *	set ttyp line security label
+	 */
+	if (secflag) {
+		char slave_dev[16];
+
+		sprintf(tty_dev, "/dev/pty/%03d", ptynum);
+		if (setdevs(tty_dev, &dv) < 0)
+		 	fatal(net, "cannot set pty security");
+		sprintf(slave_dev, "/dev/ttyp%03d", ptynum);
+		if (setdevs(slave_dev, &dv) < 0)
+		 	fatal(net, "cannot set tty security");
+	}
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+	/* get name of connected client */
+	hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr),
+		who->sin_family);
+
+	if (hp == NULL && registerd_host_only) {
+		fatal(net, "Couldn't resolve your address into a host name.\r\n\
+	 Please contact your net administrator");
+	} else if (hp &&
+	    (strlen(hp->h_name) <= (unsigned int)((utmp_len < 0) ? -utmp_len
+								 : utmp_len))) {
+		host = hp->h_name;
+	} else {
+		host = inet_ntoa(who->sin_addr);
+	}
+	/*
+	 * We must make a copy because Kerberos is probably going
+	 * to also do a gethost* and overwrite the static data...
+	 */
+	strncpy(remote_host_name, host, sizeof(remote_host_name)-1);
+	remote_host_name[sizeof(remote_host_name)-1] = 0;
+	host = remote_host_name;
+
+	(void) gethostname(host_name, sizeof (host_name));
+	hostname = host_name;
+
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+	auth_encrypt_init(hostname, host, "TELNETD", 1);
+#endif
+
+	init_env();
+	/*
+	 * get terminal type.
+	 */
+	*user_name = 0;
+	level = getterminaltype(user_name);
+	setenv("TERM", terminaltype ? terminaltype : "network", 1);
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+	if (secflag) {
+		if (setulvl(dv.dv_actlvl) < 0)
+			fatal(net,"cannot setulvl()");
+		if (setucmp(dv.dv_actcmp) < 0)
+			fatal(net, "cannot setucmp()");
+	}
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+	telnet(net, pty, host);		/* begin server process */
+
+	/*NOTREACHED*/
+}  /* end of doit */
+
+#if	defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50)
+	int
+Xterm_output(ibufp, obuf, icountp, ocount)
+	char **ibufp, *obuf;
+	int *icountp, ocount;
+{
+	int ret;
+	ret = term_output(*ibufp, obuf, *icountp, ocount);
+	*ibufp += *icountp;
+	*icountp = 0;
+	return(ret);
+}
+#define	term_output	Xterm_output
+#endif	/* defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) */
+
+/*
+ * Main loop.  Select from pty and network, and
+ * hand data to telnet receiver finite state machine.
+ */
+	void
+telnet(f, p, host)
+	int f, p;
+	char *host;
+{
+	int on = 1;
+#define	TABBUFSIZ	512
+	char	defent[TABBUFSIZ];
+	char	defstrs[TABBUFSIZ];
+#undef	TABBUFSIZ
+	char *HE;
+	char *HN;
+	char *IM;
+	void netflush();
+	int nfd;
+
+	/*
+	 * Initialize the slc mapping table.
+	 */
+	get_slc_defaults();
+
+	/*
+	 * Do some tests where it is desireable to wait for a response.
+	 * Rather than doing them slowly, one at a time, do them all
+	 * at once.
+	 */
+	if (my_state_is_wont(TELOPT_SGA))
+		send_will(TELOPT_SGA, 1);
+	/*
+	 * Is the client side a 4.2 (NOT 4.3) system?  We need to know this
+	 * because 4.2 clients are unable to deal with TCP urgent data.
+	 *
+	 * To find out, we send out a "DO ECHO".  If the remote system
+	 * answers "WILL ECHO" it is probably a 4.2 client, and we note
+	 * that fact ("WILL ECHO" ==> that the client will echo what
+	 * WE, the server, sends it; it does NOT mean that the client will
+	 * echo the terminal input).
+	 */
+	send_do(TELOPT_ECHO, 1);
+
+#ifdef	LINEMODE
+	if (his_state_is_wont(TELOPT_LINEMODE)) {
+		/* Query the peer for linemode support by trying to negotiate
+		 * the linemode option.
+		 */
+		linemode = 0;
+		editmode = 0;
+		send_do(TELOPT_LINEMODE, 1);  /* send do linemode */
+	}
+#endif	/* LINEMODE */
+
+	/*
+	 * Send along a couple of other options that we wish to negotiate.
+	 */
+	send_do(TELOPT_NAWS, 1);
+	send_will(TELOPT_STATUS, 1);
+	flowmode = 1;		/* default flow control state */
+	restartany = -1;	/* uninitialized... */
+	send_do(TELOPT_LFLOW, 1);
+
+	/*
+	 * Spin, waiting for a response from the DO ECHO.  However,
+	 * some REALLY DUMB telnets out there might not respond
+	 * to the DO ECHO.  So, we spin looking for NAWS, (most dumb
+	 * telnets so far seem to respond with WONT for a DO that
+	 * they don't understand...) because by the time we get the
+	 * response, it will already have processed the DO ECHO.
+	 * Kludge upon kludge.
+	 */
+	while (his_will_wont_is_changing(TELOPT_NAWS))
+		ttloop();
+
+	/*
+	 * But...
+	 * The client might have sent a WILL NAWS as part of its
+	 * startup code; if so, we'll be here before we get the
+	 * response to the DO ECHO.  We'll make the assumption
+	 * that any implementation that understands about NAWS
+	 * is a modern enough implementation that it will respond
+	 * to our DO ECHO request; hence we'll do another spin
+	 * waiting for the ECHO option to settle down, which is
+	 * what we wanted to do in the first place...
+	 */
+	if (his_want_state_is_will(TELOPT_ECHO) &&
+	    his_state_is_will(TELOPT_NAWS)) {
+		while (his_will_wont_is_changing(TELOPT_ECHO))
+			ttloop();
+	}
+	/*
+	 * On the off chance that the telnet client is broken and does not
+	 * respond to the DO ECHO we sent, (after all, we did send the
+	 * DO NAWS negotiation after the DO ECHO, and we won't get here
+	 * until a response to the DO NAWS comes back) simulate the
+	 * receipt of a will echo.  This will also send a WONT ECHO
+	 * to the client, since we assume that the client failed to
+	 * respond because it believes that it is already in DO ECHO
+	 * mode, which we do not want.
+	 */
+	if (his_want_state_is_will(TELOPT_ECHO)) {
+		DIAG(TD_OPTIONS,
+			{sprintf(nfrontp, "td: simulating recv\r\n");
+			 nfrontp += strlen(nfrontp);});
+		willoption(TELOPT_ECHO);
+	}
+
+	/*
+	 * Finally, to clean things up, we turn on our echo.  This
+	 * will break stupid 4.2 telnets out of local terminal echo.
+	 */
+
+	if (my_state_is_wont(TELOPT_ECHO))
+		send_will(TELOPT_ECHO, 1);
+
+#ifndef	STREAMSPTY
+	/*
+	 * Turn on packet mode
+	 */
+	(void) ioctl(p, TIOCPKT, (char *)&on);
+#endif
+
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+	/*
+	 * Continuing line mode support.  If client does not support
+	 * real linemode, attempt to negotiate kludge linemode by sending
+	 * the do timing mark sequence.
+	 */
+	if (lmodetype < REAL_LINEMODE)
+		send_do(TELOPT_TM, 1);
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+
+	/*
+	 * Call telrcv() once to pick up anything received during
+	 * terminal type negotiation, 4.2/4.3 determination, and
+	 * linemode negotiation.
+	 */
+	telrcv();
+
+	(void) ioctl(f, FIONBIO, (char *)&on);
+	(void) ioctl(p, FIONBIO, (char *)&on);
+#if	defined(CRAY2) && defined(UNICOS5)
+	init_termdriver(f, p, interrupt, sendbrk);
+#endif
+
+#if	defined(SO_OOBINLINE)
+	(void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE,
+				(char *)&on, sizeof on);
+#endif	/* defined(SO_OOBINLINE) */
+
+#ifdef	SIGTSTP
+	(void) signal(SIGTSTP, SIG_IGN);
+#endif
+#ifdef	SIGTTOU
+	/*
+	 * Ignoring SIGTTOU keeps the kernel from blocking us
+	 * in ttioct() in /sys/tty.c.
+	 */
+	(void) signal(SIGTTOU, SIG_IGN);
+#endif
+
+	(void) signal(SIGCHLD, cleanup);
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	/*
+	 * Cray-2 will send a signal when pty modes are changed by slave
+	 * side.  Set up signal handler now.
+	 */
+	if ((int)signal(SIGUSR1, termstat) < 0)
+		warn("signal");
+	else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0)
+		warn("ioctl:TCSIGME");
+	/*
+	 * Make processing loop check terminal characteristics early on.
+	 */
+	termstat();
+#endif
+
+#ifdef  TIOCNOTTY
+	{
+		register int t;
+		t = open(_PATH_TTY, O_RDWR);
+		if (t >= 0) {
+			(void) ioctl(t, TIOCNOTTY, (char *)0);
+			(void) close(t);
+		}
+	}
+#endif
+
+#if	defined(CRAY) && defined(NEWINIT) && defined(TIOCSCTTY)
+	(void) setsid();
+	ioctl(p, TIOCSCTTY, 0);
+#endif
+
+	/*
+	 * Show banner that getty never gave.
+	 *
+	 * We put the banner in the pty input buffer.  This way, it
+	 * gets carriage return null processing, etc., just like all
+	 * other pty --> client data.
+	 */
+
+#if	!defined(CRAY) || !defined(NEWINIT)
+	if (getenv("USER"))
+		hostinfo = 0;
+#endif
+
+	if (getent(defent, "default") == 1) {
+		char *getstr();
+		char *cp=defstrs;
+
+		HE = getstr("he", &cp);
+		HN = getstr("hn", &cp);
+		IM = getstr("im", &cp);
+		if (HN && *HN)
+			(void) strcpy(host_name, HN);
+		if (IM == 0)
+			IM = "";
+	} else {
+		IM = DEFAULT_IM;
+		HE = 0;
+	}
+	edithost(HE, host_name);
+	if (hostinfo && *IM)
+		putf(IM, ptyibuf2);
+
+	if (pcc)
+		(void) strncat(ptyibuf2, ptyip, pcc+1);
+	ptyip = ptyibuf2;
+	pcc = strlen(ptyip);
+#ifdef	LINEMODE
+	/*
+	 * Last check to make sure all our states are correct.
+	 */
+	init_termbuf();
+	localstat();
+#endif	/* LINEMODE */
+
+	DIAG(TD_REPORT,
+		{sprintf(nfrontp, "td: Entering processing loop\r\n");
+		 nfrontp += strlen(nfrontp);});
+
+	/*
+	 * Startup the login process on the slave side of the terminal
+	 * now.  We delay this until here to insure option negotiation
+	 * is complete.
+	 */
+	startslave(host, level, user_name);
+
+	nfd = ((f > p) ? f : p) + 1;
+	for (;;) {
+		fd_set ibits, obits, xbits;
+		register int c;
+
+		if (ncc < 0 && pcc < 0)
+			break;
+
+#if	defined(CRAY2) && defined(UNICOS5)
+		if (needtermstat)
+			_termstat();
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+		FD_ZERO(&ibits);
+		FD_ZERO(&obits);
+		FD_ZERO(&xbits);
+		/*
+		 * Never look for input if there's still
+		 * stuff in the corresponding output buffer
+		 */
+		if (nfrontp - nbackp || pcc > 0) {
+			FD_SET(f, &obits);
+		} else {
+			FD_SET(p, &ibits);
+		}
+		if (pfrontp - pbackp || ncc > 0) {
+			FD_SET(p, &obits);
+		} else {
+			FD_SET(f, &ibits);
+		}
+		if (!SYNCHing) {
+			FD_SET(f, &xbits);
+		}
+		if ((c = select(nfd, &ibits, &obits, &xbits,
+						(struct timeval *)0)) < 1) {
+			if (c == -1) {
+				if (errno == EINTR) {
+					continue;
+				}
+			}
+			sleep(5);
+			continue;
+		}
+
+		/*
+		 * Any urgent data?
+		 */
+		if (FD_ISSET(net, &xbits)) {
+		    SYNCHing = 1;
+		}
+
+		/*
+		 * Something to read from the network...
+		 */
+		if (FD_ISSET(net, &ibits)) {
+#if	!defined(SO_OOBINLINE)
+			/*
+			 * In 4.2 (and 4.3 beta) systems, the
+			 * OOB indication and data handling in the kernel
+			 * is such that if two separate TCP Urgent requests
+			 * come in, one byte of TCP data will be overlaid.
+			 * This is fatal for Telnet, but we try to live
+			 * with it.
+			 *
+			 * In addition, in 4.2 (and...), a special protocol
+			 * is needed to pick up the TCP Urgent data in
+			 * the correct sequence.
+			 *
+			 * What we do is:  if we think we are in urgent
+			 * mode, we look to see if we are "at the mark".
+			 * If we are, we do an OOB receive.  If we run
+			 * this twice, we will do the OOB receive twice,
+			 * but the second will fail, since the second
+			 * time we were "at the mark", but there wasn't
+			 * any data there (the kernel doesn't reset
+			 * "at the mark" until we do a normal read).
+			 * Once we've read the OOB data, we go ahead
+			 * and do normal reads.
+			 *
+			 * There is also another problem, which is that
+			 * since the OOB byte we read doesn't put us
+			 * out of OOB state, and since that byte is most
+			 * likely the TELNET DM (data mark), we would
+			 * stay in the TELNET SYNCH (SYNCHing) state.
+			 * So, clocks to the rescue.  If we've "just"
+			 * received a DM, then we test for the
+			 * presence of OOB data when the receive OOB
+			 * fails (and AFTER we did the normal mode read
+			 * to clear "at the mark").
+			 */
+		    if (SYNCHing) {
+			int atmark;
+
+			(void) ioctl(net, SIOCATMARK, (char *)&atmark);
+			if (atmark) {
+			    ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB);
+			    if ((ncc == -1) && (errno == EINVAL)) {
+				ncc = read(net, netibuf, sizeof (netibuf));
+				if (sequenceIs(didnetreceive, gotDM)) {
+				    SYNCHing = stilloob(net);
+				}
+			    }
+			} else {
+			    ncc = read(net, netibuf, sizeof (netibuf));
+			}
+		    } else {
+			ncc = read(net, netibuf, sizeof (netibuf));
+		    }
+		    settimer(didnetreceive);
+#else	/* !defined(SO_OOBINLINE)) */
+		    ncc = read(net, netibuf, sizeof (netibuf));
+#endif	/* !defined(SO_OOBINLINE)) */
+		    if (ncc < 0 && errno == EWOULDBLOCK)
+			ncc = 0;
+		    else {
+			if (ncc <= 0) {
+			    break;
+			}
+			netip = netibuf;
+		    }
+		    DIAG((TD_REPORT | TD_NETDATA),
+			    {sprintf(nfrontp, "td: netread %d chars\r\n", ncc);
+			     nfrontp += strlen(nfrontp);});
+		    DIAG(TD_NETDATA, printdata("nd", netip, ncc));
+		}
+
+		/*
+		 * Something to read from the pty...
+		 */
+		if (FD_ISSET(p, &ibits)) {
+#ifndef	STREAMSPTY
+			pcc = read(p, ptyibuf, BUFSIZ);
+#else
+			pcc = readstream(p, ptyibuf, BUFSIZ);
+#endif
+			/*
+			 * On some systems, if we try to read something
+			 * off the master side before the slave side is
+			 * opened, we get EIO.
+			 */
+			if (pcc < 0 && (errno == EWOULDBLOCK ||
+#ifdef	EAGAIN
+					errno == EAGAIN ||
+#endif
+					errno == EIO)) {
+				pcc = 0;
+			} else {
+				if (pcc <= 0)
+					break;
+#if	!defined(CRAY2) || !defined(UNICOS5)
+#ifdef	LINEMODE
+				/*
+				 * If ioctl from pty, pass it through net
+				 */
+				if (ptyibuf[0] & TIOCPKT_IOCTL) {
+					copy_termbuf(ptyibuf+1, pcc-1);
+					localstat();
+					pcc = 1;
+				}
+#endif	/* LINEMODE */
+				if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) {
+					netclear();	/* clear buffer back */
+#ifndef	NO_URGENT
+					/*
+					 * There are client telnets on some
+					 * operating systems get screwed up
+					 * royally if we send them urgent
+					 * mode data.
+					 */
+					*nfrontp++ = IAC;
+					*nfrontp++ = DM;
+					neturg = nfrontp-1; /* off by one XXX */
+					DIAG(TD_OPTIONS,
+					    printoption("td: send IAC", DM));
+
+#endif
+				}
+				if (his_state_is_will(TELOPT_LFLOW) &&
+				    (ptyibuf[0] &
+				     (TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) {
+					int newflow =
+					    ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0;
+					if (newflow != flowmode) {
+						flowmode = newflow;
+						(void) sprintf(nfrontp,
+							"%c%c%c%c%c%c",
+							IAC, SB, TELOPT_LFLOW,
+							flowmode ? LFLOW_ON
+								 : LFLOW_OFF,
+							IAC, SE);
+						nfrontp += 6;
+						DIAG(TD_OPTIONS, printsub('>',
+						    (unsigned char *)nfrontp-4,
+						    4););
+					}
+				}
+				pcc--;
+				ptyip = ptyibuf+1;
+#else	/* defined(CRAY2) && defined(UNICOS5) */
+				if (!uselinemode) {
+					unpcc = pcc;
+					unptyip = ptyibuf;
+					pcc = term_output(&unptyip, ptyibuf2,
+								&unpcc, BUFSIZ);
+					ptyip = ptyibuf2;
+				} else
+					ptyip = ptyibuf;
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+			}
+		}
+
+		while (pcc > 0) {
+			if ((&netobuf[BUFSIZ] - nfrontp) < 2)
+				break;
+			c = *ptyip++ & 0377, pcc--;
+			if (c == IAC)
+				*nfrontp++ = c;
+#if	defined(CRAY2) && defined(UNICOS5)
+			else if (c == '\n' &&
+				     my_state_is_wont(TELOPT_BINARY) && newmap)
+				*nfrontp++ = '\r';
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+			*nfrontp++ = c;
+			if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) {
+				if (pcc > 0 && ((*ptyip & 0377) == '\n')) {
+					*nfrontp++ = *ptyip++ & 0377;
+					pcc--;
+				} else
+					*nfrontp++ = '\0';
+			}
+		}
+#if	defined(CRAY2) && defined(UNICOS5)
+		/*
+		 * If chars were left over from the terminal driver,
+		 * note their existence.
+		 */
+		if (!uselinemode && unpcc) {
+			pcc = unpcc;
+			unpcc = 0;
+			ptyip = unptyip;
+		}
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+		if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0)
+			netflush();
+		if (ncc > 0)
+			telrcv();
+		if (FD_ISSET(p, &obits) && (pfrontp - pbackp) > 0)
+			ptyflush();
+	}
+	cleanup(0);
+}  /* end of telnet */
+
+#ifndef	TCSIG
+# ifdef	TIOCSIG
+#  define TCSIG TIOCSIG
+# endif
+#endif
+
+#ifdef	STREAMSPTY
+
+int flowison = -1;  /* current state of flow: -1 is unknown */
+
+int readstream(p, ibuf, bufsize)
+	int p;
+	char *ibuf;
+	int bufsize;
+{
+	int flags = 0;
+	int ret = 0;
+	struct termios *tsp;
+	struct termio *tp;
+	struct iocblk *ip;
+	char vstop, vstart;
+	int ixon;
+	int newflow;
+
+	strbufc.maxlen = BUFSIZ;
+	strbufc.buf = (char *)ctlbuf;
+	strbufd.maxlen = bufsize-1;
+	strbufd.len = 0;
+	strbufd.buf = ibuf+1;
+	ibuf[0] = 0;
+
+	ret = getmsg(p, &strbufc, &strbufd, &flags);
+	if (ret < 0)  /* error of some sort -- probably EAGAIN */
+		return(-1);
+
+	if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) {
+		/* data message */
+		if (strbufd.len > 0) {			/* real data */
+			return(strbufd.len + 1);	/* count header char */
+		} else {
+			/* nothing there */
+			errno = EAGAIN;
+			return(-1);
+		}
+	}
+
+	/*
+	 * It's a control message.  Return 1, to look at the flag we set
+	 */
+
+	switch (ctlbuf[0]) {
+	case M_FLUSH:
+		if (ibuf[1] & FLUSHW)
+			ibuf[0] = TIOCPKT_FLUSHWRITE;
+		return(1);
+
+	case M_IOCTL:
+		ip = (struct iocblk *) (ibuf+1);
+
+		switch (ip->ioc_cmd) {
+		case TCSETS:
+		case TCSETSW:
+		case TCSETSF:
+			tsp = (struct termios *)
+					(ibuf+1 + sizeof(struct iocblk));
+			vstop = tsp->c_cc[VSTOP];
+			vstart = tsp->c_cc[VSTART];
+			ixon = tsp->c_iflag & IXON;
+			break;
+		case TCSETA:
+		case TCSETAW:
+		case TCSETAF:
+			tp = (struct termio *) (ibuf+1 + sizeof(struct iocblk));
+			vstop = tp->c_cc[VSTOP];
+			vstart = tp->c_cc[VSTART];
+			ixon = tp->c_iflag & IXON;
+			break;
+		default:
+			errno = EAGAIN;
+			return(-1);
+		}
+
+		newflow =  (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0;
+		if (newflow != flowison) {  /* it's a change */
+			flowison = newflow;
+			ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP;
+			return(1);
+		}
+	}
+
+	/* nothing worth doing anything about */
+	errno = EAGAIN;
+	return(-1);
+}
+#endif /* STREAMSPTY */
+
+/*
+ * Send interrupt to process on other side of pty.
+ * If it is in raw mode, just write NULL;
+ * otherwise, write intr char.
+ */
+	void
+interrupt()
+{
+	ptyflush();	/* half-hearted */
+
+#if defined(STREAMSPTY) && defined(TIOCSIGNAL)
+	/* Streams PTY style ioctl to post a signal */
+	{
+		int sig = SIGINT;
+		(void) ioctl(pty, TIOCSIGNAL, &sig);
+		(void) ioctl(pty, I_FLUSH, FLUSHR);
+	}
+#else
+#ifdef	TCSIG
+	(void) ioctl(pty, TCSIG, (char *)SIGINT);
+#else	/* TCSIG */
+	init_termbuf();
+	*pfrontp++ = slctab[SLC_IP].sptr ?
+			(unsigned char)*slctab[SLC_IP].sptr : '\177';
+#endif	/* TCSIG */
+#endif
+}
+
+/*
+ * Send quit to process on other side of pty.
+ * If it is in raw mode, just write NULL;
+ * otherwise, write quit char.
+ */
+	void
+sendbrk()
+{
+	ptyflush();	/* half-hearted */
+#ifdef	TCSIG
+	(void) ioctl(pty, TCSIG, (char *)SIGQUIT);
+#else	/* TCSIG */
+	init_termbuf();
+	*pfrontp++ = slctab[SLC_ABORT].sptr ?
+			(unsigned char)*slctab[SLC_ABORT].sptr : '\034';
+#endif	/* TCSIG */
+}
+
+	void
+sendsusp()
+{
+#ifdef	SIGTSTP
+	ptyflush();	/* half-hearted */
+# ifdef	TCSIG
+	(void) ioctl(pty, TCSIG, (char *)SIGTSTP);
+# else	/* TCSIG */
+	*pfrontp++ = slctab[SLC_SUSP].sptr ?
+			(unsigned char)*slctab[SLC_SUSP].sptr : '\032';
+# endif	/* TCSIG */
+#endif	/* SIGTSTP */
+}
+
+/*
+ * When we get an AYT, if ^T is enabled, use that.  Otherwise,
+ * just send back "[Yes]".
+ */
+	void
+recv_ayt()
+{
+#if	defined(SIGINFO) && defined(TCSIG)
+	if (slctab[SLC_AYT].sptr && *slctab[SLC_AYT].sptr != _POSIX_VDISABLE) {
+		(void) ioctl(pty, TCSIG, (char *)SIGINFO);
+		return;
+	}
+#endif
+	(void) strcpy(nfrontp, "\r\n[Yes]\r\n");
+	nfrontp += 9;
+}
+
+	void
+doeof()
+{
+	init_termbuf();
+
+#if	defined(LINEMODE) && defined(USE_TERMIO) && (VEOF == VMIN)
+	if (!tty_isediting()) {
+		extern char oldeofc;
+		*pfrontp++ = oldeofc;
+		return;
+	}
+#endif
+	*pfrontp++ = slctab[SLC_EOF].sptr ?
+			(unsigned char)*slctab[SLC_EOF].sptr : '\004';
+}
diff --git a/crypto/telnet/telnetd/termstat.c b/crypto/telnet/telnetd/termstat.c
new file mode 100644
index 000000000000..99fa3ddfe308
--- /dev/null
+++ b/crypto/telnet/telnetd/termstat.c
@@ -0,0 +1,677 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. 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.
+ */
+
+#ifndef lint
+#if 0
+static const char sccsid[] = "@(#)termstat.c	8.2 (Berkeley) 5/30/95";
+#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
+
+#include "telnetd.h"
+
+#if	defined(ENCRYPTION)
+#include <libtelnet/encrypt.h>
+#endif
+
+/*
+ * local variables
+ */
+int def_tspeed = -1, def_rspeed = -1;
+#ifdef	TIOCSWINSZ
+int def_row = 0, def_col = 0;
+#endif
+#ifdef	LINEMODE
+static int _terminit = 0;
+#endif	/* LINEMODE */
+
+#if	defined(CRAY2) && defined(UNICOS5)
+int	newmap = 1;	/* nonzero if \n maps to ^M^J */
+#endif
+
+#ifdef	LINEMODE
+/*
+ * localstat
+ *
+ * This function handles all management of linemode.
+ *
+ * Linemode allows the client to do the local editing of data
+ * and send only complete lines to the server.  Linemode state is
+ * based on the state of the pty driver.  If the pty is set for
+ * external processing, then we can use linemode.  Further, if we
+ * can use real linemode, then we can look at the edit control bits
+ * in the pty to determine what editing the client should do.
+ *
+ * Linemode support uses the following state flags to keep track of
+ * current and desired linemode state.
+ *	alwayslinemode : true if -l was specified on the telnetd
+ * 	command line.  It means to have linemode on as much as
+ *	possible.
+ *
+ * 	lmodetype: signifies whether the client can
+ *	handle real linemode, or if use of kludgeomatic linemode
+ *	is preferred.  It will be set to one of the following:
+ *		REAL_LINEMODE : use linemode option
+ *		NO_KLUDGE : don't initiate kludge linemode.
+ *		KLUDGE_LINEMODE : use kludge linemode
+ *		NO_LINEMODE : client is ignorant of linemode
+ *
+ *	linemode, uselinemode : linemode is true if linemode
+ *	is currently on, uselinemode is the state that we wish
+ *	to be in.  If another function wishes to turn linemode
+ *	on or off, it sets or clears uselinemode.
+ *
+ *	editmode, useeditmode : like linemode/uselinemode, but
+ *	these contain the edit mode states (edit and trapsig).
+ *
+ * The state variables correspond to some of the state information
+ * in the pty.
+ *	linemode:
+ *		In real linemode, this corresponds to whether the pty
+ *		expects external processing of incoming data.
+ *		In kludge linemode, this more closely corresponds to the
+ *		whether normal processing is on or not.  (ICANON in
+ *		system V, or COOKED mode in BSD.)
+ *		If the -l option was specified (alwayslinemode), then
+ *		an attempt is made to force external processing on at
+ *		all times.
+ *
+ * The following heuristics are applied to determine linemode
+ * handling within the server.
+ *	1) Early on in starting up the server, an attempt is made
+ *	   to negotiate the linemode option.  If this succeeds
+ *	   then lmodetype is set to REAL_LINEMODE and all linemode
+ *	   processing occurs in the context of the linemode option.
+ *	2) If the attempt to negotiate the linemode option failed,
+ *	   and the "-k" (don't initiate kludge linemode) isn't set,
+ *	   then we try to use kludge linemode.  We test for this
+ *	   capability by sending "do Timing Mark".  If a positive
+ *	   response comes back, then we assume that the client
+ *	   understands kludge linemode (ech!) and the
+ *	   lmodetype flag is set to KLUDGE_LINEMODE.
+ *	3) Otherwise, linemode is not supported at all and
+ *	   lmodetype remains set to NO_LINEMODE (which happens
+ *	   to be 0 for convenience).
+ *	4) At any time a command arrives that implies a higher
+ *	   state of linemode support in the client, we move to that
+ *	   linemode support.
+ *
+ * A short explanation of kludge linemode is in order here.
+ *	1) The heuristic to determine support for kludge linemode
+ *	   is to send a do timing mark.  We assume that a client
+ *	   that supports timing marks also supports kludge linemode.
+ *	   A risky proposition at best.
+ *	2) Further negotiation of linemode is done by changing the
+ *	   the server's state regarding SGA.  If server will SGA,
+ *	   then linemode is off, if server won't SGA, then linemode
+ *	   is on.
+ */
+	void
+localstat()
+{
+	void netflush();
+	int need_will_echo = 0;
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	/*
+	 * Keep track of that ol' CR/NL mapping while we're in the
+	 * neighborhood.
+	 */
+	newmap = tty_isnewmap();
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+	/*
+	 * Check for changes to flow control if client supports it.
+	 */
+	flowstat();
+
+	/*
+	 * Check linemode on/off state
+	 */
+	uselinemode = tty_linemode();
+
+	/*
+	 * If alwayslinemode is on, and pty is changing to turn it off, then
+	 * force linemode back on.
+	 */
+	if (alwayslinemode && linemode && !uselinemode) {
+		uselinemode = 1;
+		tty_setlinemode(uselinemode);
+	}
+
+	if (uselinemode) {
+		/*
+	 * Check for state of BINARY options.
+		 *
+		 * We only need to do the binary dance if we are actually going
+		 * to use linemode.  As this confuses some telnet clients
+		 * that don't support linemode, and doesn't gain us
+		 * anything, we don't do it unless we're doing linemode.
+		 * -Crh (henrich@msu.edu)
+	 */
+
+	if (tty_isbinaryin()) {
+		if (his_want_state_is_wont(TELOPT_BINARY))
+			send_do(TELOPT_BINARY, 1);
+	} else {
+		if (his_want_state_is_will(TELOPT_BINARY))
+			send_dont(TELOPT_BINARY, 1);
+	}
+
+	if (tty_isbinaryout()) {
+		if (my_want_state_is_wont(TELOPT_BINARY))
+			send_will(TELOPT_BINARY, 1);
+	} else {
+		if (my_want_state_is_will(TELOPT_BINARY))
+			send_wont(TELOPT_BINARY, 1);
+	}
+	}
+
+#ifdef	ENCRYPTION
+	/*
+	 * If the terminal is not echoing, but editing is enabled,
+	 * something like password input is going to happen, so
+	 * if we the other side is not currently sending encrypted
+	 * data, ask the other side to start encrypting.
+	 */
+	if (his_state_is_will(TELOPT_ENCRYPT)) {
+		static int enc_passwd = 0;
+		if (uselinemode && !tty_isecho() && tty_isediting()
+		    && (enc_passwd == 0) && !decrypt_input) {
+			encrypt_send_request_start();
+			enc_passwd = 1;
+		} else if (enc_passwd) {
+			encrypt_send_request_end();
+			enc_passwd = 0;
+		}
+	}
+#endif	/* ENCRYPTION */
+
+	/*
+	 * Do echo mode handling as soon as we know what the
+	 * linemode is going to be.
+	 * If the pty has echo turned off, then tell the client that
+	 * the server will echo.  If echo is on, then the server
+	 * will echo if in character mode, but in linemode the
+	 * client should do local echoing.  The state machine will
+	 * not send anything if it is unnecessary, so don't worry
+	 * about that here.
+	 *
+	 * If we need to send the WILL ECHO (because echo is off),
+	 * then delay that until after we have changed the MODE.
+	 * This way, when the user is turning off both editing
+	 * and echo, the client will get editing turned off first.
+	 * This keeps the client from going into encryption mode
+	 * and then right back out if it is doing auto-encryption
+	 * when passwords are being typed.
+	 */
+	if (uselinemode) {
+		if (tty_isecho())
+			send_wont(TELOPT_ECHO, 1);
+		else
+			need_will_echo = 1;
+#ifdef	KLUDGELINEMODE
+		if (lmodetype == KLUDGE_OK)
+			lmodetype = KLUDGE_LINEMODE;
+#endif
+	}
+
+	/*
+	 * If linemode is being turned off, send appropriate
+	 * command and then we're all done.
+	 */
+	 if (!uselinemode && linemode) {
+# ifdef	KLUDGELINEMODE
+		if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+			send_dont(TELOPT_LINEMODE, 1);
+# ifdef	KLUDGELINEMODE
+		} else if (lmodetype == KLUDGE_LINEMODE)
+			send_will(TELOPT_SGA, 1);
+# endif	/* KLUDGELINEMODE */
+		send_will(TELOPT_ECHO, 1);
+		linemode = uselinemode;
+		goto done;
+	}
+
+# ifdef	KLUDGELINEMODE
+	/*
+	 * If using real linemode check edit modes for possible later use.
+	 * If we are in kludge linemode, do the SGA negotiation.
+	 */
+	if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+		useeditmode = 0;
+		if (tty_isediting())
+			useeditmode |= MODE_EDIT;
+		if (tty_istrapsig())
+			useeditmode |= MODE_TRAPSIG;
+		if (tty_issofttab())
+			useeditmode |= MODE_SOFT_TAB;
+		if (tty_islitecho())
+			useeditmode |= MODE_LIT_ECHO;
+# ifdef	KLUDGELINEMODE
+	} else if (lmodetype == KLUDGE_LINEMODE) {
+		if (tty_isediting() && uselinemode)
+			send_wont(TELOPT_SGA, 1);
+		else
+			send_will(TELOPT_SGA, 1);
+	}
+# endif	/* KLUDGELINEMODE */
+
+	/*
+	 * Negotiate linemode on if pty state has changed to turn it on.
+	 * Send appropriate command and send along edit mode, then all done.
+	 */
+	if (uselinemode && !linemode) {
+# ifdef	KLUDGELINEMODE
+		if (lmodetype == KLUDGE_LINEMODE) {
+			send_wont(TELOPT_SGA, 1);
+		} else if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+			send_do(TELOPT_LINEMODE, 1);
+			/* send along edit modes */
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB,
+				TELOPT_LINEMODE, LM_MODE, useeditmode,
+				IAC, SE);
+			nfrontp += 7;
+			editmode = useeditmode;
+# ifdef	KLUDGELINEMODE
+		}
+# endif	/* KLUDGELINEMODE */
+		linemode = uselinemode;
+		goto done;
+	}
+
+# ifdef	KLUDGELINEMODE
+	/*
+	 * None of what follows is of any value if not using
+	 * real linemode.
+	 */
+	if (lmodetype < REAL_LINEMODE)
+		goto done;
+# endif	/* KLUDGELINEMODE */
+
+	if (linemode && his_state_is_will(TELOPT_LINEMODE)) {
+		/*
+		 * If edit mode changed, send edit mode.
+		 */
+		 if (useeditmode != editmode) {
+			/*
+			 * Send along appropriate edit mode mask.
+			 */
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB,
+				TELOPT_LINEMODE, LM_MODE, useeditmode,
+				IAC, SE);
+			nfrontp += 7;
+			editmode = useeditmode;
+		}
+
+
+		/*
+		 * Check for changes to special characters in use.
+		 */
+		start_slc(0);
+		check_slc();
+		(void) end_slc(0);
+	}
+
+done:
+	if (need_will_echo)
+		send_will(TELOPT_ECHO, 1);
+	/*
+	 * Some things should be deferred until after the pty state has
+	 * been set by the local process.  Do those things that have been
+	 * deferred now.  This only happens once.
+	 */
+	if (_terminit == 0) {
+		_terminit = 1;
+		defer_terminit();
+	}
+
+	netflush();
+	set_termbuf();
+	return;
+
+}  /* end of localstat */
+#endif	/* LINEMODE */
+
+/*
+ * flowstat
+ *
+ * Check for changes to flow control
+ */
+	void
+flowstat()
+{
+	if (his_state_is_will(TELOPT_LFLOW)) {
+		if (tty_flowmode() != flowmode) {
+			flowmode = tty_flowmode();
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c",
+					IAC, SB, TELOPT_LFLOW,
+					flowmode ? LFLOW_ON : LFLOW_OFF,
+					IAC, SE);
+			nfrontp += 6;
+		}
+		if (tty_restartany() != restartany) {
+			restartany = tty_restartany();
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c",
+					IAC, SB, TELOPT_LFLOW,
+					restartany ? LFLOW_RESTART_ANY
+						   : LFLOW_RESTART_XON,
+					IAC, SE);
+			nfrontp += 6;
+		}
+	}
+}
+
+/*
+ * clientstat
+ *
+ * Process linemode related requests from the client.
+ * Client can request a change to only one of linemode, editmode or slc's
+ * at a time, and if using kludge linemode, then only linemode may be
+ * affected.
+ */
+	void
+clientstat(code, parm1, parm2)
+	register int code, parm1, parm2;
+{
+	void netflush();
+
+	/*
+	 * Get a copy of terminal characteristics.
+	 */
+	init_termbuf();
+
+	/*
+	 * Process request from client. code tells what it is.
+	 */
+	switch (code) {
+#ifdef	LINEMODE
+	case TELOPT_LINEMODE:
+		/*
+		 * Don't do anything unless client is asking us to change
+		 * modes.
+		 */
+		uselinemode = (parm1 == WILL);
+		if (uselinemode != linemode) {
+# ifdef	KLUDGELINEMODE
+			/*
+			 * If using kludge linemode, make sure that
+			 * we can do what the client asks.
+			 * We can not turn off linemode if alwayslinemode
+			 * and the ICANON bit is set.
+			 */
+			if (lmodetype == KLUDGE_LINEMODE) {
+				if (alwayslinemode && tty_isediting()) {
+					uselinemode = 1;
+				}
+			}
+
+			/*
+			 * Quit now if we can't do it.
+			 */
+			if (uselinemode == linemode)
+				return;
+
+			/*
+			 * If using real linemode and linemode is being
+			 * turned on, send along the edit mode mask.
+			 */
+			if (lmodetype == REAL_LINEMODE && uselinemode)
+# else	/* KLUDGELINEMODE */
+			if (uselinemode)
+# endif	/* KLUDGELINEMODE */
+			{
+				useeditmode = 0;
+				if (tty_isediting())
+					useeditmode |= MODE_EDIT;
+				if (tty_istrapsig)
+					useeditmode |= MODE_TRAPSIG;
+				if (tty_issofttab())
+					useeditmode |= MODE_SOFT_TAB;
+				if (tty_islitecho())
+					useeditmode |= MODE_LIT_ECHO;
+				(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC,
+					SB, TELOPT_LINEMODE, LM_MODE,
+							useeditmode, IAC, SE);
+				nfrontp += 7;
+				editmode = useeditmode;
+			}
+
+
+			tty_setlinemode(uselinemode);
+
+			linemode = uselinemode;
+
+			if (!linemode)
+				send_will(TELOPT_ECHO, 1);
+		}
+		break;
+
+	case LM_MODE:
+	    {
+		register int ack, changed;
+
+		/*
+		 * Client has sent along a mode mask.  If it agrees with
+		 * what we are currently doing, ignore it; if not, it could
+		 * be viewed as a request to change.  Note that the server
+		 * will change to the modes in an ack if it is different from
+		 * what we currently have, but we will not ack the ack.
+		 */
+		 useeditmode &= MODE_MASK;
+		 ack = (useeditmode & MODE_ACK);
+		 useeditmode &= ~MODE_ACK;
+
+		 if ((changed = (useeditmode ^ editmode))) {
+			/*
+			 * This check is for a timing problem.  If the
+			 * state of the tty has changed (due to the user
+			 * application) we need to process that info
+			 * before we write in the state contained in the
+			 * ack!!!  This gets out the new MODE request,
+			 * and when the ack to that command comes back
+			 * we'll set it and be in the right mode.
+			 */
+			if (ack)
+				localstat();
+			if (changed & MODE_EDIT)
+				tty_setedit(useeditmode & MODE_EDIT);
+
+			if (changed & MODE_TRAPSIG)
+				tty_setsig(useeditmode & MODE_TRAPSIG);
+
+			if (changed & MODE_SOFT_TAB)
+				tty_setsofttab(useeditmode & MODE_SOFT_TAB);
+
+			if (changed & MODE_LIT_ECHO)
+				tty_setlitecho(useeditmode & MODE_LIT_ECHO);
+
+			set_termbuf();
+
+ 			if (!ack) {
+ 				(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC,
+					SB, TELOPT_LINEMODE, LM_MODE,
+ 					useeditmode|MODE_ACK,
+ 					IAC, SE);
+ 				nfrontp += 7;
+ 			}
+
+			editmode = useeditmode;
+		}
+
+		break;
+
+	    }  /* end of case LM_MODE */
+#endif	/* LINEMODE */
+
+	case TELOPT_NAWS:
+#ifdef	TIOCSWINSZ
+	    {
+		struct winsize ws;
+
+		def_col = parm1;
+		def_row = parm2;
+#ifdef	LINEMODE
+		/*
+		 * Defer changing window size until after terminal is
+		 * initialized.
+		 */
+		if (terminit() == 0)
+			return;
+#endif	/* LINEMODE */
+
+		/*
+		 * Change window size as requested by client.
+		 */
+
+		ws.ws_col = parm1;
+		ws.ws_row = parm2;
+		(void) ioctl(pty, TIOCSWINSZ, (char *)&ws);
+	    }
+#endif	/* TIOCSWINSZ */
+
+		break;
+
+	case TELOPT_TSPEED:
+	    {
+		def_tspeed = parm1;
+		def_rspeed = parm2;
+#ifdef	LINEMODE
+		/*
+		 * Defer changing the terminal speed.
+		 */
+		if (terminit() == 0)
+			return;
+#endif	/* LINEMODE */
+		/*
+		 * Change terminal speed as requested by client.
+		 * We set the receive speed first, so that if we can't
+		 * store seperate receive and transmit speeds, the transmit
+		 * speed will take precedence.
+		 */
+		tty_rspeed(parm2);
+		tty_tspeed(parm1);
+		set_termbuf();
+
+		break;
+
+	    }  /* end of case TELOPT_TSPEED */
+
+	default:
+		/* What? */
+		break;
+	}  /* end of switch */
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	/*
+	 * Just in case of the likely event that we changed the pty state.
+	 */
+	rcv_ioctl();
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+	netflush();
+
+}  /* end of clientstat */
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	void
+termstat()
+{
+	needtermstat = 1;
+}
+
+	void
+_termstat()
+{
+	needtermstat = 0;
+	init_termbuf();
+	localstat();
+	rcv_ioctl();
+}
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+#ifdef	LINEMODE
+/*
+ * defer_terminit
+ *
+ * Some things should not be done until after the login process has started
+ * and all the pty modes are set to what they are supposed to be.  This
+ * function is called when the pty state has been processed for the first time.
+ * It calls other functions that do things that were deferred in each module.
+ */
+	void
+defer_terminit()
+{
+
+	/*
+	 * local stuff that got deferred.
+	 */
+	if (def_tspeed != -1) {
+		clientstat(TELOPT_TSPEED, def_tspeed, def_rspeed);
+		def_tspeed = def_rspeed = 0;
+	}
+
+#ifdef	TIOCSWINSZ
+	if (def_col || def_row) {
+		struct winsize ws;
+
+		memset((char *)&ws, 0, sizeof(ws));
+		ws.ws_col = def_col;
+		ws.ws_row = def_row;
+		(void) ioctl(pty, TIOCSWINSZ, (char *)&ws);
+	}
+#endif
+
+	/*
+	 * The only other module that currently defers anything.
+	 */
+	deferslc();
+
+}  /* end of defer_terminit */
+
+/*
+ * terminit
+ *
+ * Returns true if the pty state has been processed yet.
+ */
+	int
+terminit()
+{
+	return(_terminit);
+
+}  /* end of terminit */
+#endif	/* LINEMODE */
diff --git a/crypto/telnet/telnetd/utility.c b/crypto/telnet/telnetd/utility.c
new file mode 100644
index 000000000000..4c9dec1c118e
--- /dev/null
+++ b/crypto/telnet/telnetd/utility.c
@@ -0,0 +1,1217 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. 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.
+ */
+
+#ifndef lint
+#if 0
+static const char sccsid[] = "@(#)utility.c	8.4 (Berkeley) 5/30/95";
+#endif
+static const char rcsid[] =
+	"$Id$";
+#endif /* not lint */
+
+#ifdef __FreeBSD__
+#include <locale.h>
+#endif
+#define PRINTOPTIONS
+#include "telnetd.h"
+
+#if	defined(AUTHENTICATION)
+#include <libtelnet/auth.h>
+#endif
+#if	defined(ENCRYPTION)
+#include <libtelnet/encrypt.h>
+#endif
+
+/*
+ * utility functions performing io related tasks
+ */
+
+/*
+ * ttloop
+ *
+ *	A small subroutine to flush the network output buffer, get some data
+ * from the network, and pass it through the telnet state machine.  We
+ * also flush the pty input buffer (by dropping its data) if it becomes
+ * too full.
+ */
+
+    void
+ttloop()
+{
+    void netflush();
+
+    DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop\r\n");
+		     nfrontp += strlen(nfrontp);});
+    if (nfrontp-nbackp) {
+	netflush();
+    }
+    ncc = read(net, netibuf, sizeof netibuf);
+    if (ncc < 0) {
+	syslog(LOG_INFO, "ttloop:  read: %m");
+	exit(1);
+    } else if (ncc == 0) {
+	syslog(LOG_INFO, "ttloop:  peer died: %m");
+	exit(1);
+    }
+    DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop read %d chars\r\n", ncc);
+		     nfrontp += strlen(nfrontp);});
+    netip = netibuf;
+    telrcv();			/* state machine */
+    if (ncc > 0) {
+	pfrontp = pbackp = ptyobuf;
+	telrcv();
+    }
+}  /* end of ttloop */
+
+/*
+ * Check a descriptor to see if out of band data exists on it.
+ */
+    int
+stilloob(s)
+    int	s;		/* socket number */
+{
+    static struct timeval timeout = { 0 };
+    fd_set	excepts;
+    int value;
+
+    do {
+	FD_ZERO(&excepts);
+	FD_SET(s, &excepts);
+	memset((char *)&timeout, 0, sizeof timeout);
+	value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout);
+    } while ((value == -1) && (errno == EINTR));
+
+    if (value < 0) {
+	fatalperror(pty, "select");
+    }
+    if (FD_ISSET(s, &excepts)) {
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+	void
+ptyflush()
+{
+	int n;
+
+	if ((n = pfrontp - pbackp) > 0) {
+		DIAG((TD_REPORT | TD_PTYDATA),
+			{ sprintf(nfrontp, "td: ptyflush %d chars\r\n", n);
+			  nfrontp += strlen(nfrontp); });
+		DIAG(TD_PTYDATA, printdata("pd", pbackp, n));
+		n = write(pty, pbackp, n);
+	}
+	if (n < 0) {
+		if (errno == EWOULDBLOCK || errno == EINTR)
+			return;
+		cleanup(0);
+	}
+	pbackp += n;
+	if (pbackp == pfrontp)
+		pbackp = pfrontp = ptyobuf;
+}
+
+/*
+ * nextitem()
+ *
+ *	Return the address of the next "item" in the TELNET data
+ * stream.  This will be the address of the next character if
+ * the current address is a user data character, or it will
+ * be the address of the character following the TELNET command
+ * if the current address is a TELNET IAC ("I Am a Command")
+ * character.
+ */
+    char *
+nextitem(current)
+    char	*current;
+{
+    if ((*current&0xff) != IAC) {
+	return current+1;
+    }
+    switch (*(current+1)&0xff) {
+    case DO:
+    case DONT:
+    case WILL:
+    case WONT:
+	return current+3;
+    case SB:		/* loop forever looking for the SE */
+	{
+	    register char *look = current+2;
+
+	    for (;;) {
+		if ((*look++&0xff) == IAC) {
+		    if ((*look++&0xff) == SE) {
+			return look;
+		    }
+		}
+	    }
+	}
+    default:
+	return current+2;
+    }
+}  /* end of nextitem */
+
+
+/*
+ * netclear()
+ *
+ *	We are about to do a TELNET SYNCH operation.  Clear
+ * the path to the network.
+ *
+ *	Things are a bit tricky since we may have sent the first
+ * byte or so of a previous TELNET command into the network.
+ * So, we have to scan the network buffer from the beginning
+ * until we are up to where we want to be.
+ *
+ *	A side effect of what we do, just to keep things
+ * simple, is to clear the urgent data pointer.  The principal
+ * caller should be setting the urgent data pointer AFTER calling
+ * us in any case.
+ */
+    void
+netclear()
+{
+    register char *thisitem, *next;
+    char *good;
+#define	wewant(p)	((nfrontp > p) && ((*p&0xff) == IAC) && \
+				((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
+
+#ifdef	ENCRYPTION
+    thisitem = nclearto > netobuf ? nclearto : netobuf;
+#else	/* ENCRYPTION */
+    thisitem = netobuf;
+#endif	/* ENCRYPTION */
+
+    while ((next = nextitem(thisitem)) <= nbackp) {
+	thisitem = next;
+    }
+
+    /* Now, thisitem is first before/at boundary. */
+
+#ifdef	ENCRYPTION
+    good = nclearto > netobuf ? nclearto : netobuf;
+#else	/* ENCRYPTION */
+    good = netobuf;	/* where the good bytes go */
+#endif	/* ENCRYPTION */
+
+    while (nfrontp > thisitem) {
+	if (wewant(thisitem)) {
+	    int length;
+
+	    next = thisitem;
+	    do {
+		next = nextitem(next);
+	    } while (wewant(next) && (nfrontp > next));
+	    length = next-thisitem;
+	    memmove(good, thisitem, length);
+	    good += length;
+	    thisitem = next;
+	} else {
+	    thisitem = nextitem(thisitem);
+	}
+    }
+
+    nbackp = netobuf;
+    nfrontp = good;		/* next byte to be sent */
+    neturg = 0;
+}  /* end of netclear */
+
+/*
+ *  netflush
+ *		Send as much data as possible to the network,
+ *	handling requests for urgent data.
+ */
+    void
+netflush()
+{
+    int n;
+    extern int not42;
+
+    if ((n = nfrontp - nbackp) > 0) {
+	DIAG(TD_REPORT,
+	    { sprintf(nfrontp, "td: netflush %d chars\r\n", n);
+	      n += strlen(nfrontp);  /* get count first */
+	      nfrontp += strlen(nfrontp);  /* then move pointer */
+	    });
+#ifdef	ENCRYPTION
+	if (encrypt_output) {
+		char *s = nclearto ? nclearto : nbackp;
+		if (nfrontp - s > 0) {
+			(*encrypt_output)((unsigned char *)s, nfrontp-s);
+			nclearto = nfrontp;
+		}
+	}
+#endif	/* ENCRYPTION */
+	/*
+	 * if no urgent data, or if the other side appears to be an
+	 * old 4.2 client (and thus unable to survive TCP urgent data),
+	 * write the entire buffer in non-OOB mode.
+	 */
+	if ((neturg == 0) || (not42 == 0)) {
+	    n = write(net, nbackp, n);	/* normal write */
+	} else {
+	    n = neturg - nbackp;
+	    /*
+	     * 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).
+	     */
+	    if (n > 1) {
+		n = send(net, nbackp, n-1, 0);	/* send URGENT all by itself */
+	    } else {
+		n = send(net, nbackp, n, MSG_OOB);	/* URGENT data */
+	    }
+	}
+    }
+    if (n < 0) {
+	if (errno == EWOULDBLOCK || errno == EINTR)
+		return;
+	cleanup(0);
+    }
+    nbackp += n;
+#ifdef	ENCRYPTION
+    if (nbackp > nclearto)
+	nclearto = 0;
+#endif	/* ENCRYPTION */
+    if (nbackp >= neturg) {
+	neturg = 0;
+    }
+    if (nbackp == nfrontp) {
+	nbackp = nfrontp = netobuf;
+#ifdef	ENCRYPTION
+	nclearto = 0;
+#endif	/* ENCRYPTION */
+    }
+    return;
+}  /* end of netflush */
+
+
+/*
+ * writenet
+ *
+ * Just a handy little function to write a bit of raw data to the net.
+ * It will force a transmit of the buffer if necessary
+ *
+ * arguments
+ *    ptr - A pointer to a character string to write
+ *    len - How many bytes to write
+ */
+	void
+writenet(ptr, len)
+	register unsigned char *ptr;
+	register int len;
+{
+	/* flush buffer if no room for new data) */
+	if ((&netobuf[BUFSIZ] - nfrontp) < len) {
+		/* if this fails, don't worry, buffer is a little big */
+		netflush();
+	}
+
+	memmove(nfrontp, ptr, len);
+	nfrontp += len;
+
+}  /* end of writenet */
+
+
+/*
+ * miscellaneous functions doing a variety of little jobs follow ...
+ */
+
+
+	void
+fatal(f, msg)
+	int f;
+	char *msg;
+{
+	char buf[BUFSIZ];
+
+	(void) sprintf(buf, "telnetd: %s.\r\n", msg);
+#ifdef	ENCRYPTION
+	if (encrypt_output) {
+		/*
+		 * Better turn off encryption first....
+		 * Hope it flushes...
+		 */
+		encrypt_send_end();
+		netflush();
+	}
+#endif	/* ENCRYPTION */
+	(void) write(f, buf, (int)strlen(buf));
+	sleep(1);	/*XXX*/
+	exit(1);
+}
+
+	void
+fatalperror(f, msg)
+	int f;
+	char *msg;
+{
+	char buf[BUFSIZ], *strerror();
+
+	(void) sprintf(buf, "%s: %s", msg, strerror(errno));
+	fatal(f, buf);
+}
+
+char editedhost[32];
+
+	void
+edithost(pat, host)
+	register char *pat;
+	register char *host;
+{
+	register char *res = editedhost;
+
+	if (!pat)
+		pat = "";
+	while (*pat) {
+		switch (*pat) {
+
+		case '#':
+			if (*host)
+				host++;
+			break;
+
+		case '@':
+			if (*host)
+				*res++ = *host++;
+			break;
+
+		default:
+			*res++ = *pat;
+			break;
+		}
+		if (res == &editedhost[sizeof editedhost - 1]) {
+			*res = '\0';
+			return;
+		}
+		pat++;
+	}
+	if (*host)
+		(void) strncpy(res, host,
+				sizeof editedhost - (res - editedhost) -1);
+	else
+		*res = '\0';
+	editedhost[sizeof editedhost - 1] = '\0';
+}
+
+static char *putlocation;
+
+	void
+putstr(s)
+	register char *s;
+{
+
+	while (*s)
+		putchr(*s++);
+}
+
+	void
+putchr(cc)
+	int cc;
+{
+	*putlocation++ = cc;
+}
+
+#ifdef __FreeBSD__
+static char fmtstr[] = { "%+" };
+#else
+/*
+ * This is split on two lines so that SCCS will not see the M
+ * between two % signs and expand it...
+ */
+static char fmtstr[] = { "%l:%M\
+%P on %A, %d %B %Y" };
+#endif
+
+	void
+putf(cp, where)
+	register char *cp;
+	char *where;
+{
+	char *slash;
+	time_t t;
+	char db[100];
+#ifdef	STREAMSPTY
+	extern char *strchr();
+#else
+	extern char *strrchr();
+#endif
+
+	putlocation = where;
+
+	while (*cp) {
+		if (*cp != '%') {
+			putchr(*cp++);
+			continue;
+		}
+		switch (*++cp) {
+
+		case 't':
+#ifdef	STREAMSPTY
+			/* names are like /dev/pts/2 -- we want pts/2 */
+			slash = strchr(line+1, '/');
+#else
+			slash = strrchr(line, '/');
+#endif
+			if (slash == (char *) 0)
+				putstr(line);
+			else
+				putstr(&slash[1]);
+			break;
+
+		case 'h':
+			putstr(editedhost);
+			break;
+
+		case 'd':
+#ifdef __FreeBSD__
+			setlocale(LC_TIME, "");
+#endif
+			(void)time(&t);
+			(void)strftime(db, sizeof(db), fmtstr, localtime(&t));
+			putstr(db);
+			break;
+
+		case '%':
+			putchr('%');
+			break;
+		}
+		cp++;
+	}
+}
+
+#ifdef DIAGNOSTICS
+/*
+ * Print telnet options and commands in plain text, if possible.
+ */
+	void
+printoption(fmt, option)
+	register char *fmt;
+	register int option;
+{
+	if (TELOPT_OK(option))
+		sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option));
+	else if (TELCMD_OK(option))
+		sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option));
+	else
+		sprintf(nfrontp, "%s %d\r\n", fmt, option);
+	nfrontp += strlen(nfrontp);
+	return;
+}
+
+    void
+printsub(direction, pointer, length)
+    char		direction;	/* '<' or '>' */
+    unsigned char	*pointer;	/* where suboption data sits */
+    int			length;		/* length of suboption data */
+{
+    register int i = 0;
+
+	if (!(diagnostic & TD_OPTIONS))
+		return;
+
+	if (direction) {
+	    sprintf(nfrontp, "td: %s suboption ",
+					direction == '<' ? "recv" : "send");
+	    nfrontp += strlen(nfrontp);
+	    if (length >= 3) {
+		register int j;
+
+		i = pointer[length-2];
+		j = pointer[length-1];
+
+		if (i != IAC || j != SE) {
+		    sprintf(nfrontp, "(terminated by ");
+		    nfrontp += strlen(nfrontp);
+		    if (TELOPT_OK(i))
+			sprintf(nfrontp, "%s ", TELOPT(i));
+		    else if (TELCMD_OK(i))
+			sprintf(nfrontp, "%s ", TELCMD(i));
+		    else
+			sprintf(nfrontp, "%d ", i);
+		    nfrontp += strlen(nfrontp);
+		    if (TELOPT_OK(j))
+			sprintf(nfrontp, "%s", TELOPT(j));
+		    else if (TELCMD_OK(j))
+			sprintf(nfrontp, "%s", TELCMD(j));
+		    else
+			sprintf(nfrontp, "%d", j);
+		    nfrontp += strlen(nfrontp);
+		    sprintf(nfrontp, ", not IAC SE!) ");
+		    nfrontp += strlen(nfrontp);
+		}
+	    }
+	    length -= 2;
+	}
+	if (length < 1) {
+	    sprintf(nfrontp, "(Empty suboption??\?)");
+	    nfrontp += strlen(nfrontp);
+	    return;
+	}
+	switch (pointer[0]) {
+	case TELOPT_TTYPE:
+	    sprintf(nfrontp, "TERMINAL-TYPE ");
+	    nfrontp += strlen(nfrontp);
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		sprintf(nfrontp, "SEND");
+		break;
+	    default:
+		sprintf(nfrontp,
+				"- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    nfrontp += strlen(nfrontp);
+	    break;
+	case TELOPT_TSPEED:
+	    sprintf(nfrontp, "TERMINAL-SPEED");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2);
+		nfrontp += strlen(nfrontp);
+		break;
+	    default:
+		if (pointer[1] == 1)
+		    sprintf(nfrontp, " SEND");
+		else
+		    sprintf(nfrontp, " %d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " ?%d?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    }
+	    break;
+
+	case TELOPT_LFLOW:
+	    sprintf(nfrontp, "TOGGLE-FLOW-CONTROL");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case LFLOW_OFF:
+		sprintf(nfrontp, " OFF"); break;
+	    case LFLOW_ON:
+		sprintf(nfrontp, " ON"); break;
+	    case LFLOW_RESTART_ANY:
+		sprintf(nfrontp, " RESTART-ANY"); break;
+	    case LFLOW_RESTART_XON:
+		sprintf(nfrontp, " RESTART-XON"); break;
+	    default:
+		sprintf(nfrontp, " %d (unknown)", pointer[1]);
+	    }
+	    nfrontp += strlen(nfrontp);
+	    for (i = 2; i < length; i++) {
+		sprintf(nfrontp, " ?%d?", pointer[i]);
+		nfrontp += strlen(nfrontp);
+	    }
+	    break;
+
+	case TELOPT_NAWS:
+	    sprintf(nfrontp, "NAWS");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    if (length == 2) {
+		sprintf(nfrontp, " ?%d?", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    sprintf(nfrontp, " %d %d (%d)",
+		pointer[1], pointer[2],
+		(int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
+	    nfrontp += strlen(nfrontp);
+	    if (length == 4) {
+		sprintf(nfrontp, " ?%d?", pointer[3]);
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    sprintf(nfrontp, " %d %d (%d)",
+		pointer[3], pointer[4],
+		(int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
+	    nfrontp += strlen(nfrontp);
+	    for (i = 5; i < length; i++) {
+		sprintf(nfrontp, " ?%d?", pointer[i]);
+		nfrontp += strlen(nfrontp);
+	    }
+	    break;
+
+	case TELOPT_LINEMODE:
+	    sprintf(nfrontp, "LINEMODE ");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case WILL:
+		sprintf(nfrontp, "WILL ");
+		goto common;
+	    case WONT:
+		sprintf(nfrontp, "WONT ");
+		goto common;
+	    case DO:
+		sprintf(nfrontp, "DO ");
+		goto common;
+	    case DONT:
+		sprintf(nfrontp, "DONT ");
+	    common:
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, "(no option??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		switch (pointer[2]) {
+		case LM_FORWARDMASK:
+		    sprintf(nfrontp, "Forward Mask");
+		    nfrontp += strlen(nfrontp);
+		    for (i = 3; i < length; i++) {
+			sprintf(nfrontp, " %x", pointer[i]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    break;
+		default:
+		    sprintf(nfrontp, "%d (unknown)", pointer[2]);
+		    nfrontp += strlen(nfrontp);
+		    for (i = 3; i < length; i++) {
+			sprintf(nfrontp, " %d", pointer[i]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    break;
+		}
+		break;
+
+	    case LM_SLC:
+		sprintf(nfrontp, "SLC");
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length - 2; i += 3) {
+		    if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
+			sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
+		    else
+			sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]);
+		    nfrontp += strlen(nfrontp);
+		    switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
+		    case SLC_NOSUPPORT:
+			sprintf(nfrontp, " NOSUPPORT"); break;
+		    case SLC_CANTCHANGE:
+			sprintf(nfrontp, " CANTCHANGE"); break;
+		    case SLC_VARIABLE:
+			sprintf(nfrontp, " VARIABLE"); break;
+		    case SLC_DEFAULT:
+			sprintf(nfrontp, " DEFAULT"); break;
+		    }
+		    nfrontp += strlen(nfrontp);
+		    sprintf(nfrontp, "%s%s%s",
+			pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
+		    nfrontp += strlen(nfrontp);
+		    if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
+						SLC_FLUSHOUT| SLC_LEVELBITS)) {
+			sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]);
+		    nfrontp += strlen(nfrontp);
+		    if ((pointer[i+SLC_VALUE] == IAC) &&
+			(pointer[i+SLC_VALUE+1] == IAC))
+				i++;
+		}
+		for (; i < length; i++) {
+		    sprintf(nfrontp, " ?%d?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+
+	    case LM_MODE:
+		sprintf(nfrontp, "MODE ");
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, "(no mode??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		{
+		    char tbuf[32];
+		    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" : "");
+		    sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0");
+		    nfrontp += strlen(nfrontp);
+		}
+		if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) {
+		    sprintf(nfrontp, " (0x%x)", pointer[2]);
+		    nfrontp += strlen(nfrontp);
+		}
+		for (i = 3; i < length; i++) {
+		    sprintf(nfrontp, " ?0x%x?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    default:
+		sprintf(nfrontp, "%d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " %d", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+	    }
+	    break;
+
+	case TELOPT_STATUS: {
+	    register char *cp;
+	    register int j, k;
+
+	    sprintf(nfrontp, "STATUS");
+	    nfrontp += strlen(nfrontp);
+
+	    switch (pointer[1]) {
+	    default:
+		if (pointer[1] == TELQUAL_SEND)
+		    sprintf(nfrontp, " SEND");
+		else
+		    sprintf(nfrontp, " %d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " ?%d?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    case TELQUAL_IS:
+		sprintf(nfrontp, " IS\r\n");
+		nfrontp += strlen(nfrontp);
+
+		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(pointer[i]))
+			    sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i]));
+			else
+			    sprintf(nfrontp, " %s %d", cp, pointer[i]);
+			nfrontp += strlen(nfrontp);
+
+			sprintf(nfrontp, "\r\n");
+			nfrontp += strlen(nfrontp);
+			break;
+
+		    case SB:
+			sprintf(nfrontp, " SB ");
+			nfrontp += strlen(nfrontp);
+			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) {
+			    sprintf(nfrontp, " SE");
+			    nfrontp += strlen(nfrontp);
+			    i = j;
+			} else
+			    i = j - 1;
+
+			sprintf(nfrontp, "\r\n");
+			nfrontp += strlen(nfrontp);
+
+			break;
+
+		    default:
+			sprintf(nfrontp, " %d", pointer[i]);
+			nfrontp += strlen(nfrontp);
+			break;
+		    }
+		}
+		break;
+	    }
+	    break;
+	  }
+
+	case TELOPT_XDISPLOC:
+	    sprintf(nfrontp, "X-DISPLAY-LOCATION ");
+	    nfrontp += strlen(nfrontp);
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		sprintf(nfrontp, "SEND");
+		break;
+	    default:
+		sprintf(nfrontp, "- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    nfrontp += strlen(nfrontp);
+	    break;
+
+	case TELOPT_NEW_ENVIRON:
+	    sprintf(nfrontp, "NEW-ENVIRON ");
+	    goto env_common1;
+	case TELOPT_OLD_ENVIRON:
+	    sprintf(nfrontp, "OLD-ENVIRON");
+	env_common1:
+	    nfrontp += strlen(nfrontp);
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, "IS ");
+		goto env_common;
+	    case TELQUAL_SEND:
+		sprintf(nfrontp, "SEND ");
+		goto env_common;
+	    case TELQUAL_INFO:
+		sprintf(nfrontp, "INFO ");
+	    env_common:
+		nfrontp += strlen(nfrontp);
+		{
+		    register int noquote = 2;
+		    for (i = 2; i < length; i++ ) {
+			switch (pointer[i]) {
+			case NEW_ENV_VAR:
+			    sprintf(nfrontp, "\" VAR " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			case NEW_ENV_VALUE:
+			    sprintf(nfrontp, "\" VALUE " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			case ENV_ESC:
+			    sprintf(nfrontp, "\" ESC " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			case ENV_USERVAR:
+			    sprintf(nfrontp, "\" USERVAR " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			default:
+			    if (isprint(pointer[i]) && pointer[i] != '"') {
+				if (noquote) {
+				    *nfrontp++ = '"';
+				    noquote = 0;
+				}
+				*nfrontp++ = pointer[i];
+			    } else {
+				sprintf(nfrontp, "\" %03o " + noquote,
+							pointer[i]);
+				nfrontp += strlen(nfrontp);
+				noquote = 2;
+			    }
+			    break;
+			}
+		    }
+		    if (!noquote)
+			*nfrontp++ = '"';
+		    break;
+		}
+	    }
+	    break;
+
+#if	defined(AUTHENTICATION)
+	case TELOPT_AUTHENTICATION:
+	    sprintf(nfrontp, "AUTHENTICATION");
+	    nfrontp += strlen(nfrontp);
+
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_REPLY:
+	    case TELQUAL_IS:
+		sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ?
+							"IS" : "REPLY");
+		nfrontp += strlen(nfrontp);
+		if (AUTHTYPE_NAME_OK(pointer[2]))
+		    sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2]));
+		else
+		    sprintf(nfrontp, "%d ", pointer[2]);
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, "(partial suboption??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		sprintf(nfrontp, "%s|%s",
+			((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+			"CLIENT" : "SERVER",
+			((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+			"MUTUAL" : "ONE-WAY");
+		nfrontp += strlen(nfrontp);
+
+    		{
+		    char buf[512];
+		    auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
+		    sprintf(nfrontp, "%s", buf);
+		}
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case TELQUAL_SEND:
+		i = 2;
+		sprintf(nfrontp, " SEND ");
+		nfrontp += strlen(nfrontp);
+		while (i < length) {
+		    if (AUTHTYPE_NAME_OK(pointer[i]))
+			sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i]));
+		    else
+			sprintf(nfrontp, "%d ", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		    if (++i >= length) {
+			sprintf(nfrontp, "(partial suboption??\?)");
+			nfrontp += strlen(nfrontp);
+			break;
+		    }
+		    sprintf(nfrontp, "%s|%s ",
+			((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+							"CLIENT" : "SERVER",
+			((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+							"MUTUAL" : "ONE-WAY");
+		    nfrontp += strlen(nfrontp);
+		    ++i;
+		}
+		break;
+
+	    case TELQUAL_NAME:
+		i = 2;
+		sprintf(nfrontp, " NAME \"");
+		nfrontp += strlen(nfrontp);
+		while (i < length)
+		    *nfrontp += pointer[i++];
+		*nfrontp += '"';
+		break;
+
+	    default:
+		    for (i = 2; i < length; i++) {
+			sprintf(nfrontp, " ?%d?", pointer[i]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    break;
+	    }
+	    break;
+#endif
+
+#ifdef	ENCRYPTION
+	case TELOPT_ENCRYPT:
+	    sprintf(nfrontp, "ENCRYPT");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case ENCRYPT_START:
+		sprintf(nfrontp, " START");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_END:
+		sprintf(nfrontp, " END");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_REQSTART:
+		sprintf(nfrontp, " REQUEST-START");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_REQEND:
+		sprintf(nfrontp, " REQUEST-END");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_IS:
+	    case ENCRYPT_REPLY:
+		sprintf(nfrontp, " %s ", (pointer[1] == ENCRYPT_IS) ?
+							"IS" : "REPLY");
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, " (partial suboption??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		if (ENCTYPE_NAME_OK(pointer[2]))
+		    sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[2]));
+		else
+		    sprintf(nfrontp, " %d (unknown)", pointer[2]);
+		nfrontp += strlen(nfrontp);
+
+		{
+		    char buf[512];
+		    encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf));
+		    sprintf(nfrontp, "%s", buf);
+		}
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_SUPPORT:
+		i = 2;
+		sprintf(nfrontp, " SUPPORT ");
+		nfrontp += strlen(nfrontp);
+		while (i < length) {
+		    if (ENCTYPE_NAME_OK(pointer[i]))
+			sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[i]));
+		    else
+			sprintf(nfrontp, "%d ", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		    i++;
+		}
+		break;
+
+	    case ENCRYPT_ENC_KEYID:
+		sprintf(nfrontp, " ENC_KEYID");
+		nfrontp += strlen(nfrontp);
+		goto encommon;
+
+	    case ENCRYPT_DEC_KEYID:
+		sprintf(nfrontp, " DEC_KEYID");
+		nfrontp += strlen(nfrontp);
+		goto encommon;
+
+	    default:
+		sprintf(nfrontp, " %d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+	    encommon:
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " %d", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    }
+	    break;
+#endif	/* ENCRYPTION */
+
+	default:
+	    if (TELOPT_OK(pointer[0]))
+		sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0]));
+	    else
+		sprintf(nfrontp, "%d (unknown)", pointer[i]);
+	    nfrontp += strlen(nfrontp);
+	    for (i = 1; i < length; i++) {
+		sprintf(nfrontp, " %d", pointer[i]);
+		nfrontp += strlen(nfrontp);
+	    }
+	    break;
+	}
+	sprintf(nfrontp, "\r\n");
+	nfrontp += strlen(nfrontp);
+}
+
+/*
+ * Dump a data buffer in hex and ascii to the output data stream.
+ */
+	void
+printdata(tag, ptr, cnt)
+	register char *tag;
+	register char *ptr;
+	register int cnt;
+{
+	register int i;
+	char xbuf[30];
+
+	while (cnt) {
+		/* flush net output buffer if no room for new data) */
+		if ((&netobuf[BUFSIZ] - nfrontp) < 80) {
+			netflush();
+		}
+
+		/* add a line of output */
+		sprintf(nfrontp, "%s: ", tag);
+		nfrontp += strlen(nfrontp);
+		for (i = 0; i < 20 && cnt; i++) {
+			sprintf(nfrontp, "%02x", *ptr);
+			nfrontp += strlen(nfrontp);
+			if (isprint(*ptr)) {
+				xbuf[i] = *ptr;
+			} else {
+				xbuf[i] = '.';
+			}
+			if (i % 2) {
+				*nfrontp = ' ';
+				nfrontp++;
+			}
+			cnt--;
+			ptr++;
+		}
+		xbuf[i] = '\0';
+		sprintf(nfrontp, " %s\r\n", xbuf );
+		nfrontp += strlen(nfrontp);
+	}
+}
+#endif /* DIAGNOSTICS */