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Remove telnetd sources

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Differential Revision:	https://reviews.freebsd.org/D36621
This commit is contained in:
Brooks Davis 2022-10-05 17:26:30 +01:00
parent 1d090028d3
commit d701f45aba
13 changed files with 0 additions and 7655 deletions
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86
contrib/telnet/telnetd/authenc.c
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@ -1,86 +0,0 @@
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char sccsid[] = "@(#)authenc.c 8.2 (Berkeley) 5/30/95";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifdef AUTHENTICATION
#ifdef ENCRYPTION
/* Above "#ifdef"s actually "or"'ed together. XXX MarkM
*/
#include "telnetd.h"
#include <libtelnet/misc.h>
int
net_write(unsigned char *str, int len)
{
if (nfrontp + len < netobuf + BUFSIZ) {
output_datalen(str, len);
return(len);
}
return(0);
}
void
net_encrypt(void)
{
#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(void)
{
ttloop();
return(0);
}
char *
telnet_getenv(char *val)
{
return(getenv(val));
}
char *
telnet_gets(const char *prompt __unused, char *result __unused, int length __unused, int echo __unused)
{
return(NULL);
}
#endif /* ENCRYPTION */
#endif /* AUTHENTICATION */

254
contrib/telnet/telnetd/defs.h
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@ -1,254 +0,0 @@
/*
* 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. 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.
*
* @(#)defs.h 8.1 (Berkeley) 6/4/93
* $FreeBSD$
*/
/*
* Telnet server defines
*/
#include <sys/types.h>
#include <sys/param.h>
#ifndef BSD
# define BSD 43
#endif
#if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
#define TELOPTS
#define TELCMDS
#define SLC_NAMES
#endif
#if defined(SYSV_TERMIO) && !defined(USE_TERMIO)
# define USE_TERMIO
#endif
#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#ifndef FILIO_H
#include <sys/ioctl.h>
#else
#include <sys/filio.h>
#endif
#include <netinet/in.h>
#include <arpa/telnet.h>
#include <stdio.h>
#ifdef __STDC__
#include <stdlib.h>
#endif
#include <signal.h>
#include <errno.h>
#include <netdb.h>
#include <syslog.h>
#ifndef LOG_DAEMON
#define LOG_DAEMON 0
#endif
#ifndef LOG_ODELAY
#define LOG_ODELAY 0
#endif
#include <ctype.h>
#ifndef NO_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#ifndef USE_TERMIO
#include <sgtty.h>
#else
# ifdef SYSV_TERMIO
# include <termio.h>
# else
# include <termios.h>
# endif
#endif
#if !defined(USE_TERMIO) || defined(NO_CC_T)
typedef unsigned char cc_t;
#endif
#ifdef __STDC__
#include <unistd.h>
#endif
#ifndef _POSIX_VDISABLE
# ifdef VDISABLE
# define _POSIX_VDISABLE VDISABLE
# else
# define _POSIX_VDISABLE ((unsigned char)'\377')
# endif
#endif
#if !defined(TIOCSCTTY) && defined(TCSETCTTY)
# define TIOCSCTTY TCSETCTTY
#endif
#ifndef FD_SET
#ifndef HAVE_fd_set
typedef struct fd_set { int fds_bits[1]; } fd_set;
#endif
#define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n)))
#define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n)))
#define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n)))
#define FD_ZERO(p) ((p)->fds_bits[0] = 0)
#endif /* FD_SET */
/*
* I/O data buffers defines
*/
#define NETSLOP 64
#define NIACCUM(c) { *netip++ = c; \
ncc++; \
}
/* clock manipulations */
#define settimer(x) (clocks.x = ++clocks.system)
#define sequenceIs(x,y) (clocks.x < clocks.y)
/*
* Linemode support states, in decreasing order of importance
*/
#define REAL_LINEMODE 0x04
#define KLUDGE_OK 0x03
#define NO_AUTOKLUDGE 0x02
#define KLUDGE_LINEMODE 0x01
#define NO_LINEMODE 0x00
/*
* Structures of information for each special character function.
*/
typedef struct {
unsigned char flag; /* the flags for this function */
cc_t val; /* the value of the special character */
} slcent, *Slcent;
typedef struct {
slcent defset; /* the default settings */
slcent current; /* the current settings */
cc_t *sptr; /* a pointer to the char in */
/* system data structures */
} slcfun, *Slcfun;
#ifdef DIAGNOSTICS
/*
* Diagnostics capabilities
*/
#define TD_REPORT 0x01 /* Report operations to client */
#define TD_EXERCISE 0x02 /* Exercise client's implementation */
#define TD_NETDATA 0x04 /* Display received data stream */
#define TD_PTYDATA 0x08 /* Display data passed to pty */
#define TD_OPTIONS 0x10 /* Report just telnet options */
#endif /* DIAGNOSTICS */
/*
* We keep track of each side of the option negotiation.
*/
#define MY_STATE_WILL 0x01
#define MY_WANT_STATE_WILL 0x02
#define MY_STATE_DO 0x04
#define MY_WANT_STATE_DO 0x08
/*
* Macros to check the current state of things
*/
#define my_state_is_do(opt) (options[opt]&MY_STATE_DO)
#define my_state_is_will(opt) (options[opt]&MY_STATE_WILL)
#define my_want_state_is_do(opt) (options[opt]&MY_WANT_STATE_DO)
#define my_want_state_is_will(opt) (options[opt]&MY_WANT_STATE_WILL)
#define my_state_is_dont(opt) (!my_state_is_do(opt))
#define my_state_is_wont(opt) (!my_state_is_will(opt))
#define my_want_state_is_dont(opt) (!my_want_state_is_do(opt))
#define my_want_state_is_wont(opt) (!my_want_state_is_will(opt))
#define set_my_state_do(opt) (options[opt] |= MY_STATE_DO)
#define set_my_state_will(opt) (options[opt] |= MY_STATE_WILL)
#define set_my_want_state_do(opt) (options[opt] |= MY_WANT_STATE_DO)
#define set_my_want_state_will(opt) (options[opt] |= MY_WANT_STATE_WILL)
#define set_my_state_dont(opt) (options[opt] &= ~MY_STATE_DO)
#define set_my_state_wont(opt) (options[opt] &= ~MY_STATE_WILL)
#define set_my_want_state_dont(opt) (options[opt] &= ~MY_WANT_STATE_DO)
#define set_my_want_state_wont(opt) (options[opt] &= ~MY_WANT_STATE_WILL)
/*
* Tricky code here. What we want to know is if the MY_STATE_WILL
* and MY_WANT_STATE_WILL bits have the same value. Since the two
* bits are adjacent, a little arithmatic will show that by adding
* in the lower bit, the upper bit will be set if the two bits were
* different, and clear if they were the same.
*/
#define my_will_wont_is_changing(opt) \
((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)
#define my_do_dont_is_changing(opt) \
((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)
/*
* Make everything symetrical
*/
#define HIS_STATE_WILL MY_STATE_DO
#define HIS_WANT_STATE_WILL MY_WANT_STATE_DO
#define HIS_STATE_DO MY_STATE_WILL
#define HIS_WANT_STATE_DO MY_WANT_STATE_WILL
#define his_state_is_do my_state_is_will
#define his_state_is_will my_state_is_do
#define his_want_state_is_do my_want_state_is_will
#define his_want_state_is_will my_want_state_is_do
#define his_state_is_dont my_state_is_wont
#define his_state_is_wont my_state_is_dont
#define his_want_state_is_dont my_want_state_is_wont
#define his_want_state_is_wont my_want_state_is_dont
#define set_his_state_do set_my_state_will
#define set_his_state_will set_my_state_do
#define set_his_want_state_do set_my_want_state_will
#define set_his_want_state_will set_my_want_state_do
#define set_his_state_dont set_my_state_wont
#define set_his_state_wont set_my_state_dont
#define set_his_want_state_dont set_my_want_state_wont
#define set_his_want_state_wont set_my_want_state_dont
#define his_will_wont_is_changing my_do_dont_is_changing
#define his_do_dont_is_changing my_will_wont_is_changing

218
contrib/telnet/telnetd/ext.h
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/*
* 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. 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.
*
* @(#)ext.h 8.2 (Berkeley) 12/15/93
* $FreeBSD$
*/
#ifndef EXTERN
#define EXTERN extern
#endif
/*
* Telnet server variable declarations
*/
EXTERN char options[256];
EXTERN char do_dont_resp[256];
EXTERN char will_wont_resp[256];
EXTERN int linemode; /* linemode on/off */
#ifdef LINEMODE
EXTERN int uselinemode; /* what linemode to use (on/off) */
EXTERN int editmode; /* edit modes in use */
EXTERN int useeditmode; /* edit modes to use */
EXTERN int alwayslinemode; /* command line option */
EXTERN int lmodetype; /* Client support for linemode */
#endif /* LINEMODE */
EXTERN int flowmode; /* current flow control state */
EXTERN int restartany; /* restart output on any character state */
#ifdef DIAGNOSTICS
EXTERN int diagnostic; /* telnet diagnostic capabilities */
#endif /* DIAGNOSTICS */
#ifdef BFTPDAEMON
EXTERN int bftpd; /* behave as bftp daemon */
#endif /* BFTPDAEMON */
#ifdef AUTHENTICATION
EXTERN int auth_level;
#endif
EXTERN slcfun slctab[NSLC + 1]; /* slc mapping table */
EXTERN char *terminaltype;
/*
* I/O data buffers, pointers, and counters.
*/
EXTERN char ptyobuf[BUFSIZ+NETSLOP], *pfrontp, *pbackp;
EXTERN char netibuf[BUFSIZ], *netip;
EXTERN char netobuf[BUFSIZ], *nfrontp, *nbackp;
EXTERN char *neturg; /* one past last bye of urgent data */
EXTERN int pcc, ncc;
EXTERN int pty, net;
EXTERN char line[32];
EXTERN int SYNCHing; /* we are in TELNET SYNCH mode */
EXTERN void
_termstat(void),
add_slc(char, char, cc_t),
check_slc(void),
change_slc(char, char, cc_t),
cleanup(int),
clientstat(int, int, int),
copy_termbuf(char *, size_t),
deferslc(void),
defer_terminit(void),
do_opt_slc(unsigned char *, int),
doeof(void),
dooption(int),
dontoption(int),
edithost(char *, char *),
fatal(int, const char *),
fatalperror(int, const char *),
get_slc_defaults(void),
init_env(void),
init_termbuf(void),
interrupt(void),
localstat(void),
flowstat(void),
netclear(void),
netflush(void),
#ifdef DIAGNOSTICS
printoption(const char *, int),
printdata(const char *, char *, int),
printsub(char, unsigned char *, int),
#endif
process_slc(unsigned char, unsigned char, cc_t),
ptyflush(void),
putchr(int),
putf(char *, char *),
recv_ayt(void),
send_do(int, int),
send_dont(int, int),
send_slc(void),
send_status(void),
send_will(int, int),
send_wont(int, int),
sendbrk(void),
sendsusp(void),
set_termbuf(void),
start_login(char *, int, char *),
start_slc(int),
#ifdef AUTHENTICATION
start_slave(char *),
#else
start_slave(char *, int, char *),
#endif
suboption(void),
telrcv(void),
ttloop(void),
tty_binaryin(int),
tty_binaryout(int);
EXTERN int
end_slc(unsigned char **),
getnpty(void),
#ifndef convex
getpty(int *),
#endif
login_tty(int),
spcset(int, cc_t *, cc_t **),
stilloob(int),
terminit(void),
termstat(void),
tty_flowmode(void),
tty_restartany(void),
tty_isbinaryin(void),
tty_isbinaryout(void),
tty_iscrnl(void),
tty_isecho(void),
tty_isediting(void),
tty_islitecho(void),
tty_isnewmap(void),
tty_israw(void),
tty_issofttab(void),
tty_istrapsig(void),
tty_linemode(void);
EXTERN void
tty_rspeed(int),
tty_setecho(int),
tty_setedit(int),
tty_setlinemode(int),
tty_setlitecho(int),
tty_setsig(int),
tty_setsofttab(int),
tty_tspeed(int),
willoption(int),
wontoption(int);
int output_data(const char *, ...) __printflike(1, 2);
void output_datalen(const char *, int);
void startslave(char *, int, char *);
#ifdef ENCRYPTION
extern void (*encrypt_output)(unsigned char *, int);
extern int (*decrypt_input)(int);
EXTERN char *nclearto;
#endif /* ENCRYPTION */
/*
* The following are some clocks used to decide how to interpret
* the relationship between various variables.
*/
EXTERN struct {
int
system, /* what the current time is */
echotoggle, /* last time user entered echo character */
modenegotiated, /* last time operating mode negotiated */
didnetreceive, /* last time we read data from network */
ttypesubopt, /* ttype subopt is received */
tspeedsubopt, /* tspeed subopt is received */
environsubopt, /* environ subopt is received */
oenvironsubopt, /* old environ subopt is received */
xdisplocsubopt, /* xdisploc subopt is received */
baseline, /* time started to do timed action */
gotDM; /* when did we last see a data mark */
} clocks;
#ifndef DEFAULT_IM
# ifdef ultrix
# define DEFAULT_IM "\r\n\r\nULTRIX (%h) (%t)\r\n\r\r\n\r"
# else
# ifdef __FreeBSD__
# define DEFAULT_IM "\r\n\r\nFreeBSD (%h) (%t)\r\n\r\r\n\r"
# else
# define DEFAULT_IM "\r\n\r\n4.4 BSD UNIX (%h) (%t)\r\n\r\r\n\r"
# endif
# endif
#endif

48
contrib/telnet/telnetd/global.c
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/*
* 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. 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.
*/
#if 0
#ifndef lint
static const char sccsid[] = "@(#)global.c 8.1 (Berkeley) 6/4/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* 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"

52
contrib/telnet/telnetd/pathnames.h
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/*
* 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. 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.
*
* @(#)pathnames.h 8.1 (Berkeley) 6/4/93
* $FreeBSD$
*/
#if BSD > 43
# include <paths.h>
# ifndef _PATH_LOGIN
# define _PATH_LOGIN "/usr/bin/login"
# endif
#else
# define _PATH_TTY "/dev/tty"
# ifndef _PATH_LOGIN
# define _PATH_LOGIN "/bin/login"
# endif
#endif
#ifdef BFTPDAEMON
#define BFTPPATH "/usr/ucb/bftp"
#endif /* BFTPDAEMON */

480
contrib/telnet/telnetd/slc.c
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@ -1,480 +0,0 @@
/*
* 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. 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.
*/
#if 0
#ifndef lint
static const char sccsid[] = "@(#)slc.c 8.2 (Berkeley) 5/30/95";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#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(void)
{
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.
*/
static void
default_slc(void)
{
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(void)
{
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(char func, char flag, 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(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(unsigned char **bufp)
{
int len;
/*
* 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;
output_datalen(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(unsigned char func, unsigned char flag, cc_t val)
{
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(char func, char flag, cc_t val)
{
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(void)
{
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(unsigned char *ptr, int len)
{
unsigned char func, flag;
cc_t val;
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(void)
{
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 */

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@ -1,618 +0,0 @@
.\" 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. 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
.\" $FreeBSD$
.\"
.Dd September 21, 2022
.Dt TELNETD 8
.Os
.Sh NAME
.Nm telnetd
.Nd DARPA
.Tn TELNET
protocol server
.Sh SYNOPSIS
.Nm /usr/libexec/telnetd
.Op Fl 46BUhlkn
.Op Fl D Ar debugmode
.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 u Ar len
.Op Fl debug Op Ar port
.SH DEPRECATION NOTICE
.Nm
is deprecated and may not be available in
.Fx 14.0
and later.
.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 4
Forces
.Nm
to use IPv4 addresses only.
.It Fl 6
Forces
.Nm
to use IPv6 addresses only.
.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 .
.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 h
Disable the printing of host-specific information before
login has been completed.
.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 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 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 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.
.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 .
Available
.Ar authtype
values include
.Ar KERBEROS_V4, Ar KERBEROS_V5, Ar SPX, Ar MINK,
and
.Ar SRA .
These options are completely independent of the
.Fl a
option.
.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
.Dq cooked
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 .
.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
.Bx 4.2
.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.
.El
.Sh NOTES
By default
.Nm
will read the
.Em \&he ,
.Em \&hn ,
and
.Em \&im
capabilities from
.Pa /etc/gettytab
and use that information (if present) to determine
what to display before the login: prompt.
You can
also use a System V style
.Pa /etc/issue
file by using the
.Em \&if
capability, which will override
.Em \&im .
The information specified in either
.Em \&im
or
.Em \&if
will be displayed to both console and remote logins.
.\" .Sh ENVIRONMENT
.Sh FILES
.Bl -tag -width /usr/ucb/bftp -compact
.It Pa /etc/services
.It Pa /etc/gettytab
.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),
.Xr gettytab 5
.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
.El
.Sh HISTORY
IPv6 support was added by WIDE/KAME project.
.Sh BUGS
Some
.Tn TELNET
commands are only partially implemented.
.Pp
Because of bugs in the original
.Bx 4.2
.Xr telnet 1 ,
.Nm
performs some dubious protocol exchanges to try to discover if the remote
client is, in fact, a
.Bx 4.2
.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.

1256
contrib/telnet/telnetd/telnetd.c
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45
contrib/telnet/telnetd/telnetd.h
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@ -1,45 +0,0 @@
/*
* 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. 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.h 8.1 (Berkeley) 6/4/93
* $FreeBSD$
*/
#include "defs.h"
#include "ext.h"
#ifdef DIAGNOSTICS
#define DIAG(a,b) if (diagnostic & (a)) b
#else
#define DIAG(a,b)
#endif
/* other external variables */
extern char **environ;
extern const char *altlogin;

628
contrib/telnet/telnetd/termstat.c
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@ -1,628 +0,0 @@
/*
* 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. 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.
*/
#if 0
#ifndef lint
static const char sccsid[] = "@(#)termstat.c 8.2 (Berkeley) 5/30/95";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "telnetd.h"
#ifdef 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 */
#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)
{
int need_will_echo = 0;
/*
* 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 */
output_data("%c%c%c%c%c%c%c", IAC, SB,
TELOPT_LINEMODE, LM_MODE, useeditmode,
IAC, SE);
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.
*/
output_data("%c%c%c%c%c%c%c", IAC, SB,
TELOPT_LINEMODE, LM_MODE, useeditmode,
IAC, SE);
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(void)
{
if (his_state_is_will(TELOPT_LFLOW)) {
if (tty_flowmode() != flowmode) {
flowmode = tty_flowmode();
output_data("%c%c%c%c%c%c",
IAC, SB, TELOPT_LFLOW,
flowmode ? LFLOW_ON : LFLOW_OFF,
IAC, SE);
}
if (tty_restartany() != restartany) {
restartany = tty_restartany();
output_data("%c%c%c%c%c%c",
IAC, SB, TELOPT_LFLOW,
restartany ? LFLOW_RESTART_ANY
: LFLOW_RESTART_XON,
IAC, SE);
}
}
}
/*
* 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(int code, int parm1, int parm2)
{
/*
* 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;
output_data("%c%c%c%c%c%c%c", IAC,
SB, TELOPT_LINEMODE, LM_MODE,
useeditmode, IAC, SE);
editmode = useeditmode;
}
tty_setlinemode(uselinemode);
linemode = uselinemode;
if (!linemode)
send_will(TELOPT_ECHO, 1);
}
break;
case LM_MODE:
{
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) {
output_data("%c%c%c%c%c%c%c", IAC,
SB, TELOPT_LINEMODE, LM_MODE,
useeditmode|MODE_ACK,
IAC, SE);
}
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 separate 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 */
netflush();
} /* end of clientstat */
#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(void)
{
/*
* 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(void)
{
return(_terminit);
} /* end of terminit */
#endif /* LINEMODE */

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contrib/telnet/telnetd/utility.c
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