telnet/telnet-client-cvs.patch

diff -uNr telnet/Makefile telnet.obsd-cvs/Makefile
--- telnet/Makefile	Mon Jul 27 18:25:13 1998
+++ telnet.obsd-cvs/Makefile	Sat Mar 10 10:54:26 2001
@@ -36,22 +36,20 @@
 
 PROG=	telnet
 
-CFLAGS+=-DTERMCAP -DKLUDGELINEMODE -DUSE_TERMIO -DSKEY -Dunix
-CFLAGS+=-DENV_HACK -D_USE_OLD_CURSES_
+CFLAGS+=-DKLUDGELINEMODE -DUSE_TERMIO -DENV_HACK -DSKEY -Dunix
 CFLAGS+=-I${.CURDIR}/../../lib
-LDADD+=	-locurses -ltelnet
-DPADD=	${LIBOLDCURSES} ${LIBTELNET}
+LDADD+=	-lcurses -ltelnet
+DPADD=	${LIBCURSES} ${LIBTELNET
 
 SRCS=	authenc.c commands.c main.c network.c ring.c sys_bsd.c telnet.c \
 	terminal.c tn3270.c utilities.c
 
 .include <bsd.own.mk> # for KERBEROS
 
-.if (${KERBEROS} == "yes")
+.if (${KERBEROS:L} == "yes")
 CFLAGS+=-DENCRYPTION -DAUTHENTICATION -DKRB4
 LDADD+= -lkrb -ldes
 DPADD+= ${LIBDES} ${LIBKRB}
 .endif
 
 .include <bsd.prog.mk>
-
diff -uNr telnet/commands.c telnet.obsd-cvs/commands.c
--- telnet/commands.c	Fri Apr  9 02:30:20 1999
+++ telnet.obsd-cvs/commands.c	Sat Mar 10 10:51:22 2001
@@ -1,4 +1,4 @@
-/*	$OpenBSD: commands.c,v 1.20 1999/01/04 07:55:05 art Exp $	*/
+/*	$OpenBSD: commands.c,v 1.34 2000/11/08 21:49:44 aaron Exp $	*/
 /*	$NetBSD: commands.c,v 1.14 1996/03/24 22:03:48 jtk Exp $	*/
 
 /*
@@ -69,7 +69,7 @@
 	int status;
 
 	if(argc != 3) {
-		printf("%s sequence challenge\n", argv[0]);
+		printf("usage: %s sequence challenge\n", argv[0]);
 		return 0;
 	}
 
@@ -2175,17 +2175,19 @@
     int gotmachine = 0;
     int l1 = strlen(m1);
     int l2 = strlen(m2);
-    char m1save[64];
+    char m1save[MAXHOSTNAMELEN];
 
     if (skiprc)
 	return;
 
-    strcpy(m1save, m1);
+    strncpy(m1save, m1, sizeof(m1save));
     m1 = m1save;
 
     if (rcname[0] == 0) {
 	char *home = getenv("HOME");
 
+	if (home == NULL || *home == '\0')
+	    return;
 	snprintf (rcname, sizeof(rcname), "%s/.telnetrc",
 		  home ? home : "");
     }
@@ -2248,15 +2250,9 @@
     int
 tn(int argc, char *argv[])
 {
-    struct hostent *host = 0, *alias = 0;
-#if defined(AF_INET6)
-    struct sockaddr_in6 sin6;
-#endif
+    struct addrinfo hints, *res, *res0;
+    int error;
     struct sockaddr_in sin;
-    struct sockaddr_in ladr;
-    struct sockaddr *sa;
-    int sa_size;
-    struct servent *sp = 0;
     unsigned long temp;
 #if !defined(__linux__)
     extern char *inet_ntoa();
@@ -2266,15 +2262,18 @@
     int srlen;
 #endif
     char *cmd, *hostp = 0, *portp = 0, *user = 0, *aliasp = 0;
-    int family, port = 0;
-
+    int retry;
+#ifdef NI_WITHSCOPEID
+    const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
+#else
+    const int niflags = NI_NUMERICHOST;
+#endif
+    
     /* clear the socket address prior to use */
     memset((char *)&sin, 0, sizeof(sin));
 
     if (connected) {
 	printf("?Already connected to %s\r\n", hostname);
-	seteuid(getuid());
-	setuid(getuid());
 	return 0;
     }
     if (argc < 2) {
@@ -2324,8 +2323,6 @@
 	}
     usage:
 	printf("usage: %s [-l user] [-a] host-name [port]\r\n", cmd);
-	seteuid(getuid());
-	setuid(getuid());
 	return 0;
     }
     if (hostp == 0)
@@ -2340,185 +2337,80 @@
 	temp = sourceroute(hostp, &srp, &srlen);
 	if (temp == 0) {
 	    herror(srp);
-	    seteuid(getuid());
-	    setuid(getuid());
 	    return 0;
 	} else if (temp == -1) {
 	    printf("Bad source route option: %s\r\n", hostp);
-	    seteuid(getuid());
-	    setuid(getuid());
 	    return 0;
 	} else {
 	    abort();
 	}
-    } else {
-#endif
-	memset (&sin, 0, sizeof(sin));
-#if defined(HAVE_INET_PTON) && defined(AF_INET6)
-	memset (&sin6, 0, sizeof(sin6));
-
-	if(inet_pton(AF_INET6, hostp, &sin6.sin6_addr)) {
-	    sin6.sin6_family = family = AF_INET6;
-	    sa = (struct sockaddr *)&sin6;
-	    sa_size = sizeof(sin6);
-	    strcpy(_hostname, hostp);
-	    hostname =_hostname;
-	} else
-#endif
-	    if(inet_aton(hostp, &sin.sin_addr)){
-		sin.sin_family = family = AF_INET;
-		sa = (struct sockaddr *)&sin;
-		sa_size = sizeof(sin);
-		strcpy(_hostname, hostp);
-		hostname = _hostname;
-	    } else {
-#ifdef HAVE_GETHOSTBYNAME2
-		host = gethostbyname2(hostp, AF_INET6);
-		if(host == NULL)
-		    host = gethostbyname2(hostp, AF_INET);
-#else
-		host = gethostbyname(hostp);
-#endif
-		if (host) {
-		    strncpy(_hostname, host->h_name, sizeof(_hostname));
-		    family = host->h_addrtype;
-
-		    switch(family) {
-		    case AF_INET:
-			memset(&sin, 0, sizeof(sin));
-			sa_size = sizeof(sin);
-			sa = (struct sockaddr *)&sin;
-			sin.sin_family = family;
-
-			memcpy(&sin.sin_addr, *host->h_addr_list, sizeof(struct in_addr));
-			break;
-#if defined(AF_INET6) && defined(HAVE_STRUCT_SOCKADDR_IN6)
-		    case AF_INET6:
-			memset(&sin6, 0, sizeof(sin6));
-			sa_size = sizeof(sin6);
-			sa = (struct sockaddr *)&sin6;
-			sin6.sin6_family = family;
-			memcpy(&sin6.sin6_addr, *host->h_addr_list, sizeof(struct in6_addr));
-			break;
-#endif
-		    default:
-			fprintf(stderr, "Bad address family: %d\n", family);
-			return 0;
-		    }
-		    
-		    _hostname[sizeof(_hostname)-1] = '\0';
-		    hostname = _hostname;
-		} else {
-		    herror(hostp);
-		    seteuid(getuid());
-		    setuid(getuid());
-		    return 0;
-		}
-	    }
-#if	defined(IP_OPTIONS) && defined(IPPROTO_IP)
-    }
+    } else
 #endif
-    if (portp) {
-	if (*portp == '-') {
-	    portp++;
-	    telnetport = 1;
-	} else
-	    telnetport = 0;
-	port = atoi(portp);
-	if (port == 0) {
-	    sp = getservbyname(portp, "tcp");
-	    if (sp)
-		port = sp->s_port;
-	    else {
-		printf("%s: bad port number\r\n", portp);
-		seteuid(getuid());
-		setuid(getuid());
-		return 0;
-	    }
-	} else {
-	    port = htons(port);
-	}
-    } else {
-	if (sp == 0) {
-	    sp = getservbyname("telnet", "tcp");
-	    if (sp == 0) {
-		fprintf(stderr, "telnet: tcp/telnet: unknown service\r\n");
-		seteuid(getuid());
-		setuid(getuid());
-		return 0;
-	    }
-	    port = sp->s_port;
+    {
+	hostname = hostp;
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = PF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags = AI_CANONNAME;
+	if (portp == NULL) {
+		portp = "telnet";
+	} else if (*portp == '-') {
+		portp++;
+		telnetport = 1;
+	}
+	h_errno = 0;
+	error = getaddrinfo(hostp, portp, &hints, &res0);
+	if (error) {
+	    if (error == EAI_SERVICE)
+	        warnx("%s: bad port", portp);
+	    else
+		warnx("%s: %s", hostp, gai_strerror(error));
+	   if (h_errno)
+		herror(hostp);
+	   return 0;
 	}
-	telnetport = 1;
     }
-    switch(family) {
-    case AF_INET:
-	sin.sin_port = port;
-	printf("Trying %s...\r\n", inet_ntoa(sin.sin_addr));
-	break;
-#if defined(AF_INET6) && defined(HAVE_STRUCT_SOCKADDR_IN6)
-    case AF_INET6: {
-#ifndef INET6_ADDRSTRLEN
-#define INET6_ADDRSTRLEN 46 
-#endif
 
-	char buf[INET6_ADDRSTRLEN];
-
-	sin6.sin6_port = port;
-#ifdef HAVE_INET_NTOP
-	printf("Trying %s...\r\n", inet_ntop(AF_INET6,
-					     &sin6.sin6_addr,
-					     buf,
-					     sizeof(buf)));
-#endif
-	break;
-    }
-#endif
-    default:
-	abort();
-    }
-
-    do {
-	net = socket(family, SOCK_STREAM, 0);
-	seteuid(getuid());
-	setuid(getuid());
-	if (net < 0) {
-	    perror("telnet: socket");
-	    return 0;
+    net = -1;
+    retry = 0;
+    for (res = res0; res; res = res->ai_next) {
+	if (1 /* retry */) {
+	    char hbuf[NI_MAXHOST];
+	    
+	    if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
+	            NULL, 0, niflags) != 0) {
+		strcpy(hbuf, "(invalid)");
+	    }
+	    printf("Trying %s...\r\n", hbuf);
 	}
+	net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+	if (net < 0)
+	    continue;
+	    
 	if (aliasp) {
-	    memset ((caddr_t)&ladr, 0, sizeof (ladr));
-	    temp = inet_addr(aliasp);
-	    if (temp != INADDR_NONE) {
-	        ladr.sin_addr.s_addr = temp;
-	        ladr.sin_family = AF_INET;
-	        alias = gethostbyaddr((char *)&temp, sizeof(temp), AF_INET);
-	    } else {
-	        alias = gethostbyname(aliasp);
-	        if (alias) {
-		    ladr.sin_family = alias->h_addrtype;
-#if	defined(h_addr)		/* In 4.3, this is a #define */
-		    memmove((caddr_t)&ladr.sin_addr,
-			alias->h_addr_list[0], alias->h_length);
-#else	/* defined(h_addr) */
-		    memmove((caddr_t)&ladr.sin_addr, alias->h_addr,
-			alias->h_length);
-#endif	/* defined(h_addr) */
-	        } else {
-		    herror(aliasp);
-		    return 0;
-	        }
+	    struct addrinfo ahints, *ares;
+	    memset(&ahints, 0, sizeof(ahints));
+	    ahints.ai_family = PF_UNSPEC;
+	    ahints.ai_socktype = SOCK_STREAM;
+	    ahints.ai_flags = AI_PASSIVE;
+	    error = getaddrinfo(aliasp, "0", &ahints, &ares);
+	    if (error) {
+	        warn("%s: %s", aliasp, gai_strerror(error));
+	        close(net);
+	        freeaddrinfo(ares);
+	        continue;
 	    }
-            ladr.sin_port = htons(0);
-  
-            if (bind (net, (struct sockaddr *)&ladr, sizeof(ladr)) < 0) {
-                perror(aliasp);; 
+	    if (bind(net, ares->ai_addr, ares->ai_addrlen) < 0) {
+	        perror(aliasp);
                 (void) close(net);   /* dump descriptor */
-		return 0;
+		freeaddrinfo(ares);
+		continue;
             }
+	    freeaddrinfo(ares);
         }
  #if	defined(IP_OPTIONS) && defined(IPPROTO_IP)
-	if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0)
+	if (srp && res->ai_family == AF_INET
+	 && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0)
 		perror("setsockopt (IP_OPTIONS)");
 #endif
 #if	defined(IPPROTO_IP) && defined(IP_TOS)
@@ -2542,65 +2434,32 @@
 		perror("setsockopt (SO_DEBUG)");
 	}
 
-	if (connect(net, sa, sa_size) < 0) {
-	    int retry = 0;
-
-	    if (host && host->h_addr_list[1]) {
-		int oerrno = errno;
-	        retry = 1;
-
-		switch(family) {
-		case AF_INET :
-		    fprintf(stderr, "telnet: connect to address %s: ",
-			    inet_ntoa(sin.sin_addr));
-		    ++host->h_addr_list;
-		    memcpy(&sin.sin_addr, *host->h_addr_list, sizeof(struct in_addr));
-		    break;
-#if defined(AF_INET6) && defined(HAVE_STRUCT_SOCKADDR_IN6)
-		case AF_INET6: {
-		    char buf[INET6_ADDRSTRLEN];
-
-		    fprintf(stderr, "telnet: connect to address %s: ",
-			    inet_ntop(AF_INET6, &sin6.sin6_addr, buf,
-				      sizeof(buf)));
-		    ++host->h_addr_list;
-		    memcpy(&sin6.sin6_addr, *host->h_addr_list, sizeof(struct in6_addr));
-		    break;
-		}
-#endif
-		default:
-		    abort();
-		}
-                   
-		errno = oerrno;
-		perror(NULL);
-
-		switch(family) {
-		case AF_INET :
-			printf("Trying %s...\r\n", inet_ntoa(sin.sin_addr));
-			break;
-#if defined(AF_INET6) && defined(HAVE_STRUCT_SOCKADDR_IN6)
-		case AF_INET6: {
-		    printf("Trying %s...\r\n", inet_ntop(AF_INET6,
-					     &sin6.sin6_addr,
-					     buf,
-					     sizeof(buf)));
-		    break;
-		}
-#endif
-		}
-		
-		(void) NetClose(net);
-		continue;
+	if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
+	    char hbuf[NI_MAXHOST];
+	    
+	    if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
+		    NULL, 0, NI_NUMERICHOST) != 0) {
+	        strcpy(hbuf, "(invalid)");
 	    }
-	    perror("telnet: Unable to connect to remote host");
-	    return 0;
+	    fprintf(stderr, "telnet: connect to address %s: %s\n", hbuf,
+	        strerror(errno));
+	
+	    close(net);
+	    net = -1;
+	    retry++;
+	    continue;
 	}
+
 	connected++;
 #if	defined(AUTHENTICATION) || defined(ENCRYPTION)
 	auth_encrypt_connect(connected);
 #endif	/* defined(AUTHENTICATION) */
-    } while (connected == 0);
+	break;
+    }
+    freeaddrinfo(res0);
+    if (net < 0) {
+        return 0;
+    }
     cmdrc(hostp, hostname);
     if (autologin && user == NULL) {
 	struct passwd *pw;
@@ -2652,6 +2511,9 @@
         encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)",
 #endif
 	zhelp[] =	"suspend telnet",
+#ifdef SKEY
+	skeyhelp[] =	"compute response to s/key challenge",
+#endif
 	shellhelp[] =	"invoke a subshell",
 	envhelp[] =	"change environment variables ('environ ?' for more)",
 	modestring[] = "try to enter line or character mode ('mode ?' for more)";
@@ -2690,7 +2552,7 @@
 	{ "environ",	envhelp,	env_cmd,	0 },
 	{ "?",		helphelp,	help,		0 },
 #if	defined(SKEY)
-	{ "skey",	NULL,		skey_calc,	0 },
+	{ "skey",	skeyhelp,	skey_calc,	0 },
 #endif		
 	{ 0,		0,		0,		0 }
 };
diff -uNr telnet/externs.h telnet.obsd-cvs/externs.h
--- telnet/externs.h	Mon Feb  8 22:56:11 1999
+++ telnet.obsd-cvs/externs.h	Sat Mar 10 10:54:35 2001
@@ -1,4 +1,4 @@
-/*	$OpenBSD: externs.h,v 1.4 1998/03/12 17:31:32 deraadt Exp $	*/
+/*	$OpenBSD: externs.h,v 1.5 1998/03/12 2001/01/22 11:03:38 fgsch Exp $	*/
 /* $KTH: externs.h,v 1.16 1997/11/29 02:28:35 joda Exp $ */
 
 /*
@@ -447,7 +447,7 @@
     *Ibackp,           /* Oldest byte of 3270 data */
     Ibuf[],            /* 3270 buffer */
     *Ifrontp,          /* Where next 3270 byte goes */
-    tline[],
+    tline[200],
     *transcom;         /* Transparent command */
 
 extern int
diff -uNr telnet/main.c telnet.obsd-cvs/main.c
--- telnet/main.c	Wed Apr  7 23:23:35 1999
+++ telnet.obsd-cvs/main.c	Sat Mar 10 09:59:35 2001
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.7 1998/05/15 03:16:38 art Exp $	*/
+/*	$OpenBSD: main.c,v 1.10 2001/01/21 22:46:37 aaron Exp $	*/
 /*	$NetBSD: main.c,v 1.5 1996/02/28 21:04:05 thorpej Exp $	*/
 
 /*
@@ -81,10 +81,10 @@
 	    prompt,
 #ifdef	AUTHENTICATION
 	    "[-8] [-E] [-K] [-L] [-S tos] [-X atype] [-a] [-c] [-d] [-e char]",
-	    "\n\t[-k realm] [-l user] [-f/-F] [-n tracefile] [-b hostalias ]",
+	    "\n\t[-k realm] [-l user] [-f/-F] [-n tracefile] [-b hostalias ] ",
 #else
 	    "[-8] [-E] [-L] [-S tos] [-a] [-c] [-d] [-e char] [-l user]",
-	    "\n\t[-n tracefile] [-b hostalias ]",
+	    "\n\t[-n tracefile] [-b hostalias ] ",
 #endif
 #if defined(TN3270) && defined(unix)
 # ifdef AUTHENTICATION
@@ -95,13 +95,11 @@
 #else
 	    "[-r] ",
 #endif
+	    "\n\r "
 #ifdef ENCRYPTION
-	    "[-x] [host-name [port]]"
-#else
-
-	    "[host-name [port]]"
+	    "[-x] " 
 #endif
-	);
+	    "[host-name [port]]");
 	exit(1);
 }
 
@@ -276,8 +274,8 @@
 			break;
 		case 't':
 #if defined(TN3270) && defined(unix)
+			(void)strncpy(tline, optarg, sizeof(tline));
 			transcom = tline;
-			(void)strcpy(transcom, optarg);
 #else
 			fprintf(stderr,
 			   "%s: Warning: -t ignored, no TN3270 support.\n",
diff -uNr telnet/sys_bsd.c telnet.obsd-cvs/sys_bsd.c
--- telnet/sys_bsd.c	Wed Apr  7 21:38:31 1999
+++ telnet.obsd-cvs/sys_bsd.c	Sat Mar 10 10:55:18 2001
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sys_bsd.c,v 1.6 1998/12/28 11:13:51 deraadt Exp $	*/
+/*	$OpenBSD: sys_bsd.c,v 1.8 2000/10/10 15:41:10 millert Exp $	*/
 /*	$NetBSD: sys_bsd.c,v 1.11 1996/02/28 21:04:10 thorpej Exp $	*/
 
 /*
@@ -35,6 +35,7 @@
  */
 
 #include "telnet_locl.h"
+#include <err.h>
 
 /*
  * The following routines try to encapsulate what is system dependent
@@ -198,9 +199,10 @@
 TerminalFlushOutput(void)
 {
 #ifdef	TIOCFLUSH
-    (void) ioctl(fileno(stdout), TIOCFLUSH, (char *) 0);
+    int com = FWRITE;
+    (void) ioctl(fileno(stdout), TIOCFLUSH, (int *) &com);
 #else
-    (void) ioctl(fileno(stdout), TCFLSH, (char *) 0);
+    (void) ioctl(fileno(stdout), TCFLSH, (int *) 0);
 #endif
 }
 
diff -uNr telnet/telnet.c telnet.obsd-cvs/telnet.c
--- telnet/telnet.c	Wed Apr  7 23:22:14 1999
+++ telnet.obsd-cvs/telnet.c	Sat Mar 10 11:02:34 2001
@@ -1,4 +1,4 @@
-/*	$OpenBSD: telnet.c,v 1.6 1998/07/27 15:29:29 millert Exp $	*/
+/*	$OpenBSD: telnet.c,v 1.11 2000/11/10 15:33:13 provos millert Exp $	*/
 /*	$NetBSD: telnet.c,v 1.7 1996/02/28 21:04:15 thorpej Exp $	*/
 
 /*
@@ -35,6 +35,8 @@
  */
 
 #include "telnet_locl.h"
+#include <curses.h>
+#include <term.h>
 
 #define        strip(x) (eight ? (x) : ((x) & 0x7f))
 
@@ -523,10 +525,9 @@
 }
 
 /*
- * Given a buffer returned by tgetent(), this routine will turn
- * the pipe seperated list of names in the buffer into an array
- * of pointers to null terminated names.  We toss out any bad,
- * duplicate, or verbose names (names with spaces).
+ * This routine will turn a pipe seperated list of names in the buffer
+ * into an array of pointers to NUL terminated names.  We toss out any
+ * bad, duplicate, or verbose names (names with spaces).
  */
 
 int is_unique P((char *, char **, char **));
@@ -554,7 +555,7 @@
 	/*
 	 * Count up the number of names.
 	 */
-	for (n = 1, cp = buf; *cp && *cp != ':'; cp++) {
+	for (n = 1, cp = buf; *cp; cp++) {
 		if (*cp == '|')
 			n++;
 	}
@@ -659,25 +660,6 @@
 	return (1);
 }
 
-static char termbuf[1024];
-
-int telnet_setupterm	P((char *tname, int fd, int *errp)); /* XXX move elsewhere */
-	/*ARGSUSED*/
-	int
-telnet_setupterm(char *tname, int fd, int *errp)
-{
-	(void)fd;
-	if (tgetent(termbuf, tname) == 1) {
-		termbuf[1023] = '\0';
-		if (errp)
-			*errp = 1;
-		return(0);
-	}
-	if (errp)
-		*errp = 0;
-	return(-1);
-}
-
 int resettermname = 1;
 
 char *gettermname P((void));	/* XXX move elsewhere */
@@ -687,15 +669,15 @@
 	char *tname;
 	static char **tnamep = 0;
 	static char **next;
-	int err;
+	int errret;
 
 	if (resettermname) {
 		resettermname = 0;
 		if (tnamep && tnamep != unknown)
 			free(tnamep);
 		if ((tname = (char *)env_getvalue((unsigned char *)"TERM")) &&
-				(telnet_setupterm(tname, 1, &err) == 0)) {
-			tnamep = mklist(termbuf, tname);
+				(setupterm(tname, 1, &errret) == 0)) {
+			tnamep = mklist(ttytype, tname);
 		} else {
 			if (tname && ((int)strlen(tname) <= 40)) {
 				unknown[0] = tname;
@@ -1482,10 +1464,15 @@
 	void
 env_opt_start(void)
 {
-	if (opt_reply)
-		opt_reply = (unsigned char *)realloc(opt_reply, OPT_REPLY_SIZE);
-	else
-		opt_reply = (unsigned char *)malloc(OPT_REPLY_SIZE);
+	unsigned char *p;
+	
+	if (opt_reply) {
+		p = (unsigned char *)realloc(opt_reply, OPT_REPLY_SIZE);
+		if (p == NULL)
+			free(opt_reply);
+	} else
+		p = (unsigned char *)malloc(OPT_REPLY_SIZE);
+	opt_reply = p;	
 	if (opt_reply == NULL) {
 /*@*/		printf("env_opt_start: malloc()/realloc() failed!!!\n");
 		opt_reply = opt_replyp = opt_replyend = NULL;
@@ -1532,9 +1519,13 @@
 				strlen((char *)ep) + 6 > opt_replyend)
 	{
 		int len;
+		unsigned char *p;
 		opt_replyend += OPT_REPLY_SIZE;
 		len = opt_replyend - opt_reply;
-		opt_reply = (unsigned char *)realloc(opt_reply, len);
+		p = (unsigned char *)realloc(opt_reply, len);
+		if (p == NULL)
+			free(opt_reply);
+		opt_reply = p;
 		if (opt_reply == NULL) {
 /*@*/			printf("env_opt_add: realloc() failed!!!\n");
 			opt_reply = opt_replyp = opt_replyend = NULL;
@@ -1945,7 +1936,7 @@
 				command(0, "z\n", 2);
 				continue;
 			}
-			if (sc == escape) {
+			if (sc == escape && escape != _POSIX_VDISABLE) {
 				command(0, (char *)tbp, tcc);
 				bol = 1;
 				count += tcc;
@@ -1962,7 +1953,7 @@
 		}
 		if ((sc == '\n') || (sc == '\r'))
 			bol = 1;
-	} else if (sc == escape) {
+	} else if (sc == escape && escape != _POSIX_VDISABLE) {
 	    /*
 	     * Double escape is a pass through of a single escape character.
 	     */
diff -uNr telnet/telnet_locl.h telnet.obsd-cvs/telnet_locl.h
--- telnet/telnet_locl.h	Thu Mar 12 06:57:44 1998
+++ telnet.obsd-cvs/telnet_locl.h	Sat Mar 10 11:12:37 2001
@@ -1,4 +1,4 @@
-/*	$OpenBSD: telnet_locl.h,v 1.1 1998/03/12 04:57:44 art Exp $	*/
+/*	$OpenBSD: telnet_locl.h,v 1.2 1999/12/11 09:08:09 itojun Exp $	*/
 /* $KTH: telnet_locl.h,v 1.13 1997/11/03 21:37:55 assar Exp $ */
 
 /*
@@ -86,7 +86,5 @@
 #include "defines.h"
 #include "types.h"
 
-#undef AF_INET6 /* XXX - it has not been tested and it doesn't exist yet */
-
 /* prototypes */
 
diff -uNr libtelnet/kerberos.c libtelnet.obsd-cvs/kerberos.c
--- libtelnet/kerberos.c	Mon Feb  8 23:38:17 1999
+++ libtelnet.obsd-cvs/kerberos.c	Sat Mar 10 11:11:03 2001
@@ -320,11 +320,10 @@
 	    char ts[MAXPATHLEN];
 	    struct passwd *pw = getpwnam(UserNameRequested);
 
-	    if(pw){
+	    if (pw) {
 		snprintf(ts, sizeof(ts),
-			 "%s%u",
-			 TKT_ROOT,
-			 (unsigned)pw->pw_uid);
+			"%s%u", TKT_ROOT, (unsigned)pw->pw_uid);
+		/* XXX allocation failure? */
 		setenv("KRBTKFILE", ts, 1);
 	    }
 	    Data(ap, KRB_ACCEPT, NULL, 0);
@@ -609,16 +608,26 @@
 {
     unsigned char *p = buf;
     
-    p += krb_put_nir(cred->service, cred->instance, cred->realm, p);
+    memcpy (p, cred->service, ANAME_SZ);
+    p += ANAME_SZ;
+    memcpy (p, cred->instance, INST_SZ);
+    p += INST_SZ;
+    memcpy (p, cred->realm, REALM_SZ);
+    p += REALM_SZ;
     memcpy(p, cred->session, 8);
     p += 8;
     *p++ = cred->lifetime;
     *p++ = cred->kvno;
-    p += krb_put_int(cred->ticket_st.length, p, 4);
+    p += krb_put_int(cred->ticket_st.length, p, 4, 4);
     memcpy(p, cred->ticket_st.dat, cred->ticket_st.length);
     p += cred->ticket_st.length;
-    p += krb_put_int(cred->issue_date, p, 4);
-    p += krb_put_nir(cred->pname, cred->pinst, NULL, p);
+    p += krb_put_int(cred->issue_date, p, 4, 4);
+    strncpy (cred->pname, p, ANAME_SZ);
+    cred->pname[ANAME_SZ - 1] = '\0';
+    p += ANAME_SZ;
+    strncpy (cred->pinst, p, INST_SZ);
+    cred->pinst[INST_SZ - 1] = '\0';
+    p += INST_SZ;
     return p - buf;
 }
 
@@ -627,7 +636,16 @@
 {
     unsigned char *p = buf;
 
-    p += krb_get_nir(p, cred->service, cred->instance, cred->realm);
+    strncpy (cred->service, p, ANAME_SZ);
+    cred->service[ANAME_SZ - 1] = '\0';
+    p += ANAME_SZ;
+    strncpy (cred->instance, p, INST_SZ);
+    cred->instance[INST_SZ - 1] = '\0';
+    p += INST_SZ;
+    strncpy (cred->realm, p, REALM_SZ);
+    cred->realm[REALM_SZ - 1] = '\0';
+    p += REALM_SZ;
+
     memcpy(cred->session, p, 8);
     p += 8;
     cred->lifetime = *p++;
@@ -636,7 +654,10 @@
     memcpy(cred->ticket_st.dat, p, cred->ticket_st.length);
     cred->ticket_st.mbz = 0;
     p += krb_get_int(p, (u_int32_t *)&cred->issue_date, 4, 0);
-    p += krb_get_nir(p, cred->pname, cred->pinst, NULL);
+    p += krb_get_nir(p, 
+		    cred->pname, sizeof(cred->pname),
+		    cred->pinst, sizeof(cred->pinst),
+		    NULL, 0);
     return 0;
 }
 
--- telnet/telnet.1	Thu Nov 12 01:01:46 1998
+++ telnet.obsd-cvs/telnet.1	Thu Nov  9 19:52:41 2000
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: telnet.1,v 1.14 1998/11/11 23:01:46 aaron Exp $
+.\"	$OpenBSD: telnet.1,v 1.27 2000/11/09 17:52:41 aaron Exp $
 .\"	$NetBSD: telnet.1,v 1.5 1996/02/28 21:04:12 thorpej Exp $
 .\"
 .\" Copyright (c) 1983, 1990, 1993
@@ -36,45 +36,34 @@
 .\"
 .Dd February 3, 1994
 .Dt TELNET 1
-.Os BSD 4.2
+.Os
 .Sh NAME
 .Nm telnet
-.Nd user interface to the 
+.Nd user interface to the
 .Tn TELNET
 protocol
 .Sh SYNOPSIS
 .Nm telnet
-.Op Fl 8
-.Op Fl E
-.Op Fl F
-.Op Fl K
-.Op Fl L
-.Op Fl S Ar tos
+.Op Fl 8EFKLacdfrx
 .Op Fl X Ar authtype
-.Op Fl a
 .Op Fl b Ar hostalias
-.Op Fl c
-.Op Fl d
 .Op Fl e Ar escapechar
-.Op Fl f
 .Op Fl k Ar realm
 .Op Fl l Ar user
 .Op Fl n Ar tracefile
-.Op Fl r
-.Op Fl x
 .Oo
 .Ar host
 .Op Ar port
 .Oc
 .Sh DESCRIPTION
 The
-.Nm telnet
+.Nm
 command
-is used to communicate with another host using the 
+is used to communicate with another host using the
 .Tn TELNET
 protocol.
 If
-.Nm telnet
+.Nm
 is invoked without the
 .Ar host
 argument, it enters command mode,
@@ -85,11 +74,11 @@
 .Ic open
 command with those arguments.
 .Pp
-Options:
-.Bl -tag -width indent
+The options are as follows:
+.Bl -tag -width Ds
 .It Fl 8
-Specifies an 8-bit data path.  This causes an attempt to
-negotiate the
+Specifies an 8-bit data path.
+This causes an attempt to negotiate the
 .Dv TELNET BINARY
 option on both input and output.
 .It Fl E
@@ -103,18 +92,9 @@
 .It Fl K
 Specifies no automatic login to the remote system.
 .It Fl L
-Specifies an 8-bit data path on output.  This causes the
-BINARY option to be negotiated on output.
-.It Fl S Ar tos
-Sets the IP type-of-service (TOS) option for the telnet
-connection to the value
-.Ar tos ,
-which can be a numeric TOS value
-or, on systems that support it, a symbolic
-TOS name found in the
-.Pa /etc/iptos
-file.
-.It Fl X Ar atype 
+Specifies an 8-bit data path on output.
+This causes the BINARY option to be negotiated on output.
+.It Fl X Ar atype
 Disables the
 .Ar atype
 type of authentication.
@@ -144,7 +124,8 @@
 .It Fl c
 Disables the reading of the user's
 .Pa \&.telnetrc
-file.  (See the
+file.
+(See the
 .Ic toggle skiprc
 command on this man page.)
 .It Fl d
@@ -152,7 +133,7 @@
 .Ic debug
 toggle to
 .Dv TRUE .
-.It Fl e Ar escapechar 
+.It Fl e Ar escapechar
 Sets the initial
 .Nm
 escape character to
@@ -169,14 +150,14 @@
 If Kerberos authentication is being used, the
 .Fl k
 option requests that
-.Nm telnet
+.Nm
 obtain tickets for the remote host in
 realm
 .Ar realm
 instead of the remote host's realm, as determined
 by
 .Xr krb_realmofhost 3 .
-.It Fl l Ar user 
+.It Fl l Ar user
 When connecting to the remote system, if the remote system
 understands the
 .Ev ENVIRON
@@ -189,7 +170,7 @@
 This option may also be used with the
 .Ic open
 command.
-.It Fl n Ar tracefile 
+.It Fl n Ar tracefile
 Opens
 .Ar tracefile
 for recording trace information.
@@ -210,35 +191,38 @@
 Indicates the official name, an alias, or the Internet address
 of a remote host.
 .It Ar port
-Indicates a port number (address of an application).  If a number is
-not specified, the default
-.Nm telnet
+Indicates a port number (address of an application).
+If a number is not specified, the default
+.Nm
 port is used.
 .El
 .Pp
-When in rlogin mode, a line of the form ~.  disconnects from the
+When in rlogin mode, a line of the form ~.
+disconnects from the
 remote host; ~ is the telnet escape character.
 Similarly, the line ~^Z suspends the telnet session.
 The line ~^] escapes to the normal telnet escape prompt.
 .Pp
 Once a connection has been opened,
-.Nm telnet
+.Nm
 will attempt to enable the
 .Dv TELNET LINEMODE
 option.
 If this fails,
-.Nm telnet
+.Nm
 will revert to one of two input modes:
 either ``character at a time''
 or ``old line by line''
 depending on what the remote system supports.
 .Pp
-When 
+When
 .Dv LINEMODE
 is enabled, character processing is done on the
-local system, under the control of the remote system.  When input
+local system, under the control of the remote system.
+When input
 editing or character echoing is to be disabled, the remote system
-will relay that information.  The remote system will also relay
+will relay that information.
+The remote system will also relay
 changes to any special characters that happen on the remote
 system, so that they can take effect on the local system.
 .Pp
@@ -252,7 +236,7 @@
 (this would mostly be used to enter passwords
 without the password being echoed).
 .Pp
-If the 
+If the
 .Dv LINEMODE
 option is enabled, or if the
 .Ic localchars
@@ -267,7 +251,7 @@
 characters are trapped locally, and sent as
 .Tn TELNET
 protocol sequences to the remote side.
-If 
+If
 .Dv LINEMODE
 has ever been enabled, then the user's
 .Ic susp
@@ -278,9 +262,9 @@
 protocol sequences,
 and
 .Ic quit
-is sent as a 
+is sent as a
 .Dv TELNET ABORT
-instead of 
+instead of
 .Dv BREAK .
 There are options (see
 .Ic toggle
@@ -296,17 +280,26 @@
 (in the case of
 .Ic quit
 and
-.Ic intr  ) .
+.Ic intr ) .
 .Pp
 While connected to a remote host,
-.Nm telnet
+.Nm
 command mode may be entered by typing the
-.Nm telnet
+.Nm
 ``escape character'' (initially ``^]'').
 When in command mode, the normal terminal editing conventions are available.
+Note that the escape character will return to the command mode of the initial
+invocation of
+.Nm
+that has the controlling terminal.
+Use the
+.Cm send escape
+command to switch to command mode in subsequent
+.Nm
+processes on remote hosts.
 .Pp
 The following
-.Nm telnet
+.Nm
 commands are available.
 Only enough of each command to uniquely identify it need be typed
 (this is also true for arguments to the
@@ -320,26 +313,28 @@
 .Ic display
 commands).
 .Bl -tag -width "mode type"
-.It Ic auth Ar argument Op Ar ... 
+.It Ic auth Ar argument Op Ar ...
 The
 .Ic auth
 command manipulates the information sent through the
 .Dv TELNET AUTHENTICATE
-option.  Valid arguments for the
-auth command are as follows:
+option.
+Valid arguments for the
+.Ic auth
+command are as follows:
 .Bl -tag -width "disable type"
 .It Ic disable Ar type
 Disables the specified
 .Ar type
-of authentication.  To
-obtain a list of available types, use the
+of authentication.
+To obtain a list of available types, use the
 .Ic auth disable \&?
 command.
 .It Ic enable Ar type
 Enables the specified
 .Ar type
-of authentication.  To
-obtain a list of available types, use the
+of authentication.
+To obtain a list of available types, use the
 .Ic auth enable \&?
 command.
 .It Ic status
@@ -350,7 +345,7 @@
 Close a
 .Tn TELNET
 session and return to command mode.
-.It Ic display Ar argument Op Ar ... 
+.It Ic display Ar argument Op Ar ...
 Displays all, or some, of the
 .Ic set
 and
@@ -368,26 +363,27 @@
 .It Ic disable Ar type Ic [input|output]
 Disables the specified
 .Ar type
-of encryption.  If you
-omit
+of encryption.
+If you omit
 .Ic input
 and
 .Ic output ,
 both input and output
-are disabled.  To obtain a list of available
-types, use the
+are disabled.
+To obtain a list of available types, use the
 .Ic encrypt disable \&?
 command.
 .It Ic enable Ar type Ic [input|output]
 Enables the specified
 .Ar type
-of encryption.  If you
-omit
+of encryption.
+If you omit
 .Ic input
 and
 .Ic output ,
 both input and output are
-enabled.  To obtain a list of available types, use the
+enabled.
+To obtain a list of available types, use the
 .Ic encrypt enable \&?
 command.
 .It Ic input
@@ -407,18 +403,20 @@
 .Ic encrypt stop output
 command.
 .It Ic start Ic [input|output]
-Attempts to start encryption.  If you omit
+Attempts to start encryption.
+If you omit
 .Ic input
 and
-.Ic output,
-both input and output are enabled.  To
-obtain a list of available types, use the
+.Ic output ,
+both input and output are enabled.
+To obtain a list of available types, use the
 .Ic encrypt enable \&?
 command.
 .It Ic status
 Lists the current status of encryption.
 .It Ic stop Ic [input|output]
-Stops encryption.  If you omit
+Stops encryption.
+If you omit
 .Ic input
 and
 .Ic output ,
@@ -431,7 +429,7 @@
 .Ic encrypt stop
 commands.
 .El
-.It Ic environ Ar arguments Op Ar ... 
+.It Ic environ Ar arguments Op Ar ...
 The
 .Ic environ
 command is used to manipulate the
@@ -456,7 +454,7 @@
 .Ic environ
 command are:
 .Bl -tag -width Fl
-.It Ic define Ar variable value 
+.It Ic define Ar variable value
 Define the variable
 .Ar variable
 to have a value of
@@ -466,15 +464,15 @@
 .Ar value
 may be enclosed in single or double quotes so
 that tabs and spaces may be included.
-.It Ic undefine Ar variable 
+.It Ic undefine Ar variable
 Remove
 .Ar variable
 from the list of environment variables.
-.It Ic export Ar variable 
+.It Ic export Ar variable
 Mark the variable
 .Ar variable
 to be exported to the remote side.
-.It Ic unexport Ar variable 
+.It Ic unexport Ar variable
 Mark the variable
 .Ar variable
 to not be exported unless
@@ -508,7 +506,7 @@
 suspending a user's session for later reattachment,
 the logout argument indicates that you
 should terminate the session immediately.
-.It Ic mode Ar type 
+.It Ic mode Ar type
 .Ar type
 is one of several options, depending on the state of the
 .Tn TELNET
@@ -529,40 +527,40 @@
 option, or, if the remote side does not understand the
 .Dv LINEMODE
 option, then attempt to enter ``old-line-by-line'' mode.
-.It Ic isig Pq Ic \-isig 
-Attempt to enable (disable) the 
+.It Ic isig Pq Ic \-isig
+Attempt to enable (disable) the
 .Dv TRAPSIG
-mode of the 
+mode of the
 .Dv LINEMODE
 option.
-This requires that the 
+This requires that the
 .Dv LINEMODE
 option be enabled.
-.It Ic edit Pq Ic \-edit 
-Attempt to enable (disable) the 
+.It Ic edit Pq Ic \-edit
+Attempt to enable (disable) the
 .Dv EDIT
-mode of the 
+mode of the
 .Dv LINEMODE
 option.
-This requires that the 
+This requires that the
 .Dv LINEMODE
 option be enabled.
-.It Ic softtabs Pq Ic \-softtabs 
-Attempt to enable (disable) the 
+.It Ic softtabs Pq Ic \-softtabs
+Attempt to enable (disable) the
 .Dv SOFT_TAB
-mode of the 
+mode of the
 .Dv LINEMODE
 option.
-This requires that the 
+This requires that the
 .Dv LINEMODE
 option be enabled.
-.It Ic litecho Pq Ic \-litecho 
-Attempt to enable (disable) the 
+.It Ic litecho Pq Ic \-litecho
+Attempt to enable (disable) the
 .Dv LIT_ECHO
-mode of the 
+mode of the
 .Dv LINEMODE
 option.
-This requires that the 
+This requires that the
 .Dv LINEMODE
 option be enabled.
 .It Ic \&?
@@ -579,7 +577,7 @@
 Open a connection to the named host.
 If no port number
 is specified,
-.Nm telnet
+.Nm
 will attempt to contact a
 .Tn TELNET
 server at the default port.
@@ -594,24 +592,29 @@
 .Ev ENVIRON
 option.
 When connecting to a non-standard port,
-.Nm telnet
+.Nm
 omits any automatic initiation of
 .Tn TELNET
-options.  When the port number is preceded by a minus sign,
+options.
+When the port number is preceded by a minus sign,
 the initial option negotiation is done.
 After establishing a connection, the file
 .Pa \&.telnetrc
 in the
-user's home directory is opened.  Lines beginning with a ``#'' are
-comment lines.  Blank lines are ignored.  Lines that begin
-without white space are the start of a machine entry.  The
-first thing on the line is the name of the machine that is
-being connected to.  The rest of the line, and successive
-lines that begin with white space are assumed to be
-.Nm telnet
+user's home directory is opened.
+Lines beginning with a ``#'' are
+comment lines.
+Blank lines are ignored.
+Lines that begin
+without whitespace are the start of a machine entry.
+The first thing on the line is the name of the machine that is
+being connected to.
+The rest of the line, and successive
+lines that begin with whitespace are assumed to be
+.Nm
 commands and are processed as if they had been typed
 in manually to the
-.Nm telnet
+.Nm
 command prompt.
 .It Ic quit
 Close any open
@@ -619,7 +622,7 @@
 session and exit
 .Nm telnet .
 An end-of-file (in command mode) will also close a session and exit.
-.It Ic send Ar arguments 
+.It Ic send Ar arguments
 Sends one or more special character sequences to the remote host.
 The following are the arguments which may be specified
 (more than one argument may be specified at a time):
@@ -673,7 +676,7 @@
 sequence.
 .It Ic escape
 Sends the current
-.Nm telnet
+.Nm
 escape character (initially ``^]'').
 .It Ic ga
 Sends the
@@ -788,12 +791,12 @@
 .Ic send
 command.
 .El
-.It Ic set Ar argument value 
-.It Ic unset Ar argument value 
+.It Ic set Ar argument value
+.It Ic unset Ar argument value
 The
 .Ic set
 command will set any one of a number of
-.Nm telnet
+.Nm
 variables to a specific value or to
 .Dv TRUE .
 The special value
@@ -811,7 +814,8 @@
 .Ic display
 command.
 The variables which may be set or unset, but not toggled, are
-listed here.  In addition, any of the variables for the
+listed here.
+In addition, any of the variables for the
 .Ic toggle
 command may be explicitly set or unset using
 the
@@ -832,7 +836,8 @@
 sequence (see
 .Ic send ayt
 preceding) is sent to the
-remote host.  The initial value for the "Are You There"
+remote host.
+The initial value for the "Are You There"
 character is the terminal's status character.
 .It Ic echo
 This is the value (initially ``^E'') which, when in
@@ -841,7 +846,7 @@
 echoing of entered characters (for entering, say, a password).
 .It Ic eof
 If
-.Nm telnet
+.Nm
 is operating in
 .Dv LINEMODE
 or ``old line by line'' mode, entering this character
@@ -854,7 +859,7 @@
 character.
 .It Ic erase
 If
-.Nm telnet
+.Nm
 is in
 .Ic localchars
 mode (see
@@ -862,7 +867,7 @@
 .Ic localchars
 below),
 and if
-.Nm telnet
+.Nm
 is operating in ``character at a time'' mode, then when this
 character is typed, a
 .Dv TELNET EC
@@ -879,14 +884,14 @@
 character.
 .It Ic escape
 This is the
-.Nm telnet
+.Nm
 escape character (initially ``^['') which causes entry
 into
-.Nm telnet
+.Nm
 command mode (when connected to a remote system).
 .It Ic flushoutput
 If
-.Nm telnet
+.Nm
 is in
 .Ic localchars
 mode (see
@@ -916,12 +921,13 @@
 .Dv LINEMODE ,
 these are the
 characters that, when typed, cause partial lines to be
-forwarded to the remote system.  The initial value for
+forwarded to the remote system.
+The initial value for
 the forwarding characters are taken from the terminal's
 eol and eol2 characters.
 .It Ic interrupt
 If
-.Nm telnet
+.Nm
 is in
 .Ic localchars
 mode (see
@@ -945,7 +951,7 @@
 character.
 .It Ic kill
 If
-.Nm telnet
+.Nm
 is in
 .Ic localchars
 mode (see
@@ -953,7 +959,7 @@
 .Ic localchars
 below),
 and if
-.Nm telnet
+.Nm
 is operating in ``character at a time'' mode, then when this
 character is typed, a
 .Dv TELNET EL
@@ -970,7 +976,7 @@
 character.
 .It Ic lnext
 If
-.Nm telnet
+.Nm
 is operating in
 .Dv LINEMODE
 or ``old line by line'' mode, then this character is taken to
@@ -985,7 +991,7 @@
 character.
 .It Ic quit
 If
-.Nm telnet
+.Nm
 is in
 .Ic localchars
 mode (see
@@ -1009,7 +1015,7 @@
 character.
 .It Ic reprint
 If
-.Nm telnet
+.Nm
 is operating in
 .Dv LINEMODE
 or old line by line'' mode, then this character is taken to
@@ -1031,8 +1037,9 @@
 This character, at the beginning of a line, followed by
 a "." closes the connection; when followed by a ^Z it
 suspends the
-.Nm telnet
-command.  The initial state is to
+.Nm
+command.
+The initial state is to
 disable the
 .Ic rlogin
 escape character.
@@ -1066,7 +1073,7 @@
 character.
 .It Ic susp
 If
-.Nm telnet
+.Nm
 is in
 .Ic localchars
 mode, or
@@ -1093,12 +1100,13 @@
 .Ic option
 tracing being
 .Dv TRUE ,
-will be written.  If it is set to
+will be written.
+If it is set to
 .Dq Fl ,
 then tracing information will be written to standard output (the default).
 .It Ic worderase
 If
-.Nm telnet
+.Nm
 is operating in
 .Dv LINEMODE
 or ``old line by line'' mode, then this character is taken to
@@ -1117,25 +1125,32 @@
 .Pq Ic unset
 commands.
 .El
-.It Ic slc Ar state 
+.It Ic skey Ar sequence challenge
+The
+.Ic skey
+command computes a response to the S/Key challenge.
+See
+.Xr skey 1
+for more information on the S/Key system.
+.It Ic slc Ar state
 The
 .Ic slc
 command (Set Local Characters) is used to set
 or change the state of the special
-characters when the 
+characters when the
 .Dv TELNET LINEMODE
 option has
-been enabled.  Special characters are characters that get
-mapped to 
+been enabled.
+Special characters are characters that get mapped to
 .Tn TELNET
 commands sequences (like
 .Ic ip
 or
-.Ic quit  )
+.Ic quit )
 or line editing characters (like
 .Ic erase
 and
-.Ic kill  ) .
+.Ic kill ) .
 By default, the local special characters are exported.
 .Bl -tag -width Fl
 .It Ic check
@@ -1144,15 +1159,15 @@
 character settings, and if there are any discrepancies with
 the local side, the local side will switch to the remote value.
 .It Ic export
-Switch to the local defaults for the special characters.  The
-local default characters are those of the local terminal at
+Switch to the local defaults for the special characters.
+The local default characters are those of the local terminal at
 the time when
-.Nm telnet
+.Nm
 was started.
 .It Ic import
 Switch to the remote defaults for the special characters.
 The remote default characters are those of the remote system
-at the time when the 
+at the time when the
 .Tn TELNET
 connection was established.
 .It Ic \&?
@@ -1165,13 +1180,13 @@
 .Nm telnet .
 This includes the peer one is connected to, as well
 as the current mode.
-.It Ic toggle Ar arguments Op Ar ... 
+.It Ic toggle Ar arguments Op Ar ...
 Toggle (between
 .Dv TRUE
 and
 .Dv FALSE )
 various flags that control how
-.Nm telnet
+.Nm
 responds to events.
 These flags may be set explicitly to
 .Dv TRUE
@@ -1206,7 +1221,7 @@
 sequences; see
 .Ic set
 above for details),
-.Nm telnet
+.Nm
 refuses to display any data on the user's terminal
 until the remote system acknowledges (via a
 .Dv TELNET TIMING MARK
@@ -1220,13 +1235,14 @@
 done an "stty noflsh", otherwise
 .Dv FALSE
 (see
-.Xr stty  1  ) .
+.Xr stty 1 ) .
 .It Ic autodecrypt
 When the
 .Dv TELNET ENCRYPT
 option is negotiated, by
 default the actual encryption (decryption) of the data
-stream does not start automatically.  The
+stream does not start automatically.
+The
 .Ic autoencrypt
 .Pq Ic autodecrypt
 command states that encryption of the
@@ -1238,7 +1254,8 @@
 .Dv TELNET AUTHENTICATION
 option
 .Tn TELNET
-attempts to use it to perform automatic authentication.  If the
+attempts to use it to perform automatic authentication.
+If the
 .Dv AUTHENTICATION
 option is not supported, the user's login
 name are propagated through the
@@ -1314,7 +1331,7 @@
 The initial value for this toggle is
 .Dv FALSE .
 .It Ic debug
-Toggles socket level debugging (useful only to the super-user).
+Toggles socket level debugging (useful only to the superuser).
 The initial value for this toggle is
 .Dv FALSE .
 .It Ic encdebug
@@ -1340,7 +1357,7 @@
 .Ic brk ,
 .Ic ec ,
 and
-.Ic el  ;
+.Ic el ;
 see
 .Ic send
 above).
@@ -1379,7 +1396,7 @@
 .Dv FALSE .
 .It Ic options
 Toggles the display of some internal
-.Nm telnet
+.Nm
 protocol processing (having to do with
 .Tn TELNET
 options).
@@ -1404,8 +1421,8 @@
 skips the reading of the
 .Pa \&.telnetrc
 file in the user's home
-directory when connections are opened.  The initial
-value for this toggle is
+directory when connections are opened.
+The initial value for this toggle is
 .Dv FALSE .
 .It Ic termdata
 Toggles the display of all terminal data (in hexadecimal format).
@@ -1416,9 +1433,10 @@
 .Ic verbose_encrypt
 toggle is
 .Dv TRUE ,
-.Nm telnet
+.Nm
 prints out a message each time encryption is enabled or
-disabled.  The initial value for this toggle is
+disabled.
+The initial value for this toggle is
 .Dv FALSE .
 .It Ic \&?
 Displays the legal
@@ -1430,22 +1448,24 @@
 .Nm telnet .
 This command only works when the user is using the
 .Xr csh 1 .
-.It Ic \&! Op Ar command 
+.It Ic \&! Op Ar command
 Execute a single command in a subshell on the local
-system.  If
+system.
+If
 .Ar command
 is omitted, then an interactive
 subshell is invoked.
-.It Ic \&? Op Ar command 
-Get help.  With no arguments,
-.Nm telnet
+.It Ic \&? Op Ar command
+Get help.
+With no arguments,
+.Nm
 prints a help summary.
 If a command is specified,
-.Nm telnet
+.Nm
 will print the help information for just that command.
 .El
 .Sh ENVIRONMENT
-.Nm telnet
+.Nm
 uses at least the
 .Ev HOME ,
 .Ev SHELL ,
@@ -1464,16 +1484,18 @@
 .El
 .Sh HISTORY
 The
-.Nm telnet
+.Nm
 command appeared in
 .Bx 4.2 .
 .Sh NOTES
 On some remote systems, echo has to be turned off manually when in
 ``old line by line'' mode.
 .Pp
-In ``old line by line'' mode or 
+In ``old line by line'' mode or
 .Dv LINEMODE
 the terminal's
 .Ic eof
 character is only recognized (and sent to the remote system)
 when it is the first character on a line.
+.Pp
+Source routing is not supported yet for IPv6.