Also remove conditional (AUTHENTICATION) code as we have never compiled it here, and it is doubtful that it even works in this scenario.
926 lines
20 KiB
C
926 lines
20 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions
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* are met:
|
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* 1. Redistributions of source code must retain the above copyright
|
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
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* documentation and/or other materials provided with the distribution.
|
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* 3. All advertising materials mentioning features or use of this software
|
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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*/
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#ifndef lint
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|
#if 0
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static const char sccsid[] = "@(#)utility.c 8.4 (Berkeley) 5/30/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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|
|
|
#ifdef __FreeBSD__
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#include <locale.h>
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#include <sys/utsname.h>
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#endif
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#include <string.h>
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#define PRINTOPTIONS
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#include "telnetd.h"
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|
|
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/*
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* utility functions performing io related tasks
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*/
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|
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|
/*
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* ttloop
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*
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* A small subroutine to flush the network output buffer, get some data
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|
* from the network, and pass it through the telnet state machine. We
|
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* also flush the pty input buffer (by dropping its data) if it becomes
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* too full.
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*/
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|
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|
void
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|
ttloop()
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|
{
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|
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|
DIAG(TD_REPORT, output_data("td: ttloop\r\n"));
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if (nfrontp - nbackp > 0) {
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netflush();
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|
}
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|
ncc = read(net, netibuf, sizeof netibuf);
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if (ncc < 0) {
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|
syslog(LOG_INFO, "ttloop: read: %m");
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exit(1);
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} else if (ncc == 0) {
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|
syslog(LOG_INFO, "ttloop: peer died: %m");
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|
exit(1);
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|
}
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DIAG(TD_REPORT, output_data("td: ttloop read %d chars\r\n", ncc));
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netip = netibuf;
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telrcv(); /* state machine */
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if (ncc > 0) {
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pfrontp = pbackp = ptyobuf;
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telrcv();
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}
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} /* end of ttloop */
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|
|
|
/*
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|
* Check a descriptor to see if out of band data exists on it.
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|
*/
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int
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|
stilloob(s)
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int s; /* socket number */
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|
{
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|
static struct timeval timeout = { 0 };
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fd_set excepts;
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|
int value;
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|
|
|
do {
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|
FD_ZERO(&excepts);
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|
FD_SET(s, &excepts);
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|
memset((char *)&timeout, 0, sizeof timeout);
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|
value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout);
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|
} while ((value == -1) && (errno == EINTR));
|
|
|
|
if (value < 0) {
|
|
fatalperror(pty, "select");
|
|
}
|
|
if (FD_ISSET(s, &excepts)) {
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|
return 1;
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|
} else {
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|
return 0;
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|
}
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|
}
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|
|
|
void
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|
ptyflush()
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|
{
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|
int n;
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|
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|
if ((n = pfrontp - pbackp) > 0) {
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DIAG(TD_REPORT | TD_PTYDATA,
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output_data("td: ptyflush %d chars\r\n", n));
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DIAG(TD_PTYDATA, printdata("pd", pbackp, n));
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|
n = write(pty, pbackp, n);
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|
}
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|
if (n < 0) {
|
|
if (errno == EWOULDBLOCK || errno == EINTR)
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|
return;
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|
cleanup(0);
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|
}
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|
pbackp += n;
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|
if (pbackp == pfrontp)
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|
pbackp = pfrontp = ptyobuf;
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|
}
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|
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|
/*
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|
* nextitem()
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|
*
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|
* Return the address of the next "item" in the TELNET data
|
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* stream. This will be the address of the next character if
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|
* the current address is a user data character, or it will
|
|
* be the address of the character following the TELNET command
|
|
* if the current address is a TELNET IAC ("I Am a Command")
|
|
* character.
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|
*/
|
|
char *
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|
nextitem(current)
|
|
char *current;
|
|
{
|
|
if ((*current&0xff) != IAC) {
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|
return current+1;
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|
}
|
|
switch (*(current+1)&0xff) {
|
|
case DO:
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|
case DONT:
|
|
case WILL:
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|
case WONT:
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|
return current+3;
|
|
case SB: /* loop forever looking for the SE */
|
|
{
|
|
register char *look = current+2;
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|
|
|
for (;;) {
|
|
if ((*look++&0xff) == IAC) {
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|
if ((*look++&0xff) == SE) {
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|
return look;
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|
}
|
|
}
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|
}
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|
}
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default:
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return current+2;
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|
}
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|
} /* end of nextitem */
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|
|
|
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|
/*
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|
* netclear()
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|
*
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|
* We are about to do a TELNET SYNCH operation. Clear
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|
* the path to the network.
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|
*
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|
* Things are a bit tricky since we may have sent the first
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|
* byte or so of a previous TELNET command into the network.
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|
* So, we have to scan the network buffer from the beginning
|
|
* until we are up to where we want to be.
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|
*
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|
* A side effect of what we do, just to keep things
|
|
* simple, is to clear the urgent data pointer. The principal
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|
* caller should be setting the urgent data pointer AFTER calling
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|
* us in any case.
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|
*/
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|
void
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|
netclear()
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|
{
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|
register char *thisitem, *next;
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|
char *good;
|
|
#define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \
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|
((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
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|
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|
thisitem = netobuf;
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|
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|
while ((next = nextitem(thisitem)) <= nbackp) {
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|
thisitem = next;
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|
}
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|
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|
/* Now, thisitem is first before/at boundary. */
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|
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|
good = netobuf; /* where the good bytes go */
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|
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|
while (nfrontp > thisitem) {
|
|
if (wewant(thisitem)) {
|
|
int length;
|
|
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|
next = thisitem;
|
|
do {
|
|
next = nextitem(next);
|
|
} while (wewant(next) && (nfrontp > next));
|
|
length = next-thisitem;
|
|
memmove(good, thisitem, length);
|
|
good += length;
|
|
thisitem = next;
|
|
} else {
|
|
thisitem = nextitem(thisitem);
|
|
}
|
|
}
|
|
|
|
nbackp = netobuf;
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|
nfrontp = good; /* next byte to be sent */
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|
neturg = 0;
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|
} /* end of netclear */
|
|
|
|
/*
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|
* netflush
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|
* Send as much data as possible to the network,
|
|
* handling requests for urgent data.
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|
*/
|
|
void
|
|
netflush()
|
|
{
|
|
int n;
|
|
extern int not42;
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|
|
|
while ((n = nfrontp - nbackp) > 0) {
|
|
#if 0
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|
/* XXX This causes output_data() to recurse and die */
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|
DIAG(TD_REPORT, {
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|
n += output_data("td: netflush %d chars\r\n", n);
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|
});
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|
#endif
|
|
/*
|
|
* if no urgent data, or if the other side appears to be an
|
|
* old 4.2 client (and thus unable to survive TCP urgent data),
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|
* write the entire buffer in non-OOB mode.
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|
*/
|
|
if ((neturg == 0) || (not42 == 0)) {
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|
n = write(net, nbackp, n); /* normal write */
|
|
} else {
|
|
n = neturg - nbackp;
|
|
/*
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|
* In 4.2 (and 4.3) systems, there is some question about
|
|
* what byte in a sendOOB operation is the "OOB" data.
|
|
* To make ourselves compatible, we only send ONE byte
|
|
* out of band, the one WE THINK should be OOB (though
|
|
* we really have more the TCP philosophy of urgent data
|
|
* rather than the Unix philosophy of OOB data).
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|
*/
|
|
if (n > 1) {
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|
n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */
|
|
} else {
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|
n = send(net, nbackp, n, MSG_OOB); /* URGENT data */
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|
}
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|
}
|
|
if (n == -1) {
|
|
if (errno == EWOULDBLOCK || errno == EINTR)
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|
continue;
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|
cleanup(0);
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|
/* NOTREACHED */
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|
}
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|
nbackp += n;
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|
if (nbackp >= neturg) {
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|
neturg = 0;
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|
}
|
|
if (nbackp == nfrontp) {
|
|
nbackp = nfrontp = netobuf;
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|
}
|
|
}
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|
return;
|
|
} /* end of netflush */
|
|
|
|
|
|
/*
|
|
* miscellaneous functions doing a variety of little jobs follow ...
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|
*/
|
|
|
|
|
|
void
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|
fatal(f, msg)
|
|
int f;
|
|
char *msg;
|
|
{
|
|
char buf[BUFSIZ];
|
|
|
|
(void) snprintf(buf, sizeof(buf), "telnetd: %s.\r\n", msg);
|
|
(void) write(f, buf, (int)strlen(buf));
|
|
sleep(1); /*XXX*/
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
fatalperror(f, msg)
|
|
int f;
|
|
char *msg;
|
|
{
|
|
char buf[BUFSIZ], *strerror();
|
|
|
|
(void) snprintf(buf, sizeof(buf), "%s: %s", msg, strerror(errno));
|
|
fatal(f, buf);
|
|
}
|
|
|
|
char editedhost[32];
|
|
|
|
void
|
|
edithost(pat, host)
|
|
register char *pat;
|
|
register char *host;
|
|
{
|
|
register char *res = editedhost;
|
|
|
|
if (!pat)
|
|
pat = "";
|
|
while (*pat) {
|
|
switch (*pat) {
|
|
|
|
case '#':
|
|
if (*host)
|
|
host++;
|
|
break;
|
|
|
|
case '@':
|
|
if (*host)
|
|
*res++ = *host++;
|
|
break;
|
|
|
|
default:
|
|
*res++ = *pat;
|
|
break;
|
|
}
|
|
if (res == &editedhost[sizeof editedhost - 1]) {
|
|
*res = '\0';
|
|
return;
|
|
}
|
|
pat++;
|
|
}
|
|
if (*host)
|
|
(void) strncpy(res, host,
|
|
sizeof editedhost - (res - editedhost) -1);
|
|
else
|
|
*res = '\0';
|
|
editedhost[sizeof editedhost - 1] = '\0';
|
|
}
|
|
|
|
static char *putlocation;
|
|
|
|
void
|
|
putstr(s)
|
|
register char *s;
|
|
{
|
|
|
|
while (*s)
|
|
putchr(*s++);
|
|
}
|
|
|
|
void
|
|
putchr(cc)
|
|
int cc;
|
|
{
|
|
*putlocation++ = cc;
|
|
}
|
|
|
|
#ifdef __FreeBSD__
|
|
static char fmtstr[] = { "%+" };
|
|
#else
|
|
/*
|
|
* This is split on two lines so that SCCS will not see the M
|
|
* between two % signs and expand it...
|
|
*/
|
|
static char fmtstr[] = { "%l:%M\
|
|
%P on %A, %d %B %Y" };
|
|
#endif
|
|
|
|
void
|
|
putf(cp, where)
|
|
register char *cp;
|
|
char *where;
|
|
{
|
|
char *slash;
|
|
time_t t;
|
|
char db[100];
|
|
#ifdef __FreeBSD__
|
|
static struct utsname kerninfo;
|
|
|
|
if (!*kerninfo.sysname)
|
|
uname(&kerninfo);
|
|
#endif
|
|
|
|
putlocation = where;
|
|
|
|
while (*cp) {
|
|
if (*cp =='\n') {
|
|
putstr("\r\n");
|
|
cp++;
|
|
continue;
|
|
} else if (*cp != '%') {
|
|
putchr(*cp++);
|
|
continue;
|
|
}
|
|
switch (*++cp) {
|
|
|
|
case 't':
|
|
#ifdef STREAMSPTY
|
|
/* names are like /dev/pts/2 -- we want pts/2 */
|
|
slash = strchr(line+1, '/');
|
|
#else
|
|
slash = strrchr(line, '/');
|
|
#endif
|
|
if (slash == (char *) 0)
|
|
putstr(line);
|
|
else
|
|
putstr(&slash[1]);
|
|
break;
|
|
|
|
case 'h':
|
|
putstr(editedhost);
|
|
break;
|
|
|
|
case 'd':
|
|
#ifdef __FreeBSD__
|
|
setlocale(LC_TIME, "");
|
|
#endif
|
|
(void)time(&t);
|
|
(void)strftime(db, sizeof(db), fmtstr, localtime(&t));
|
|
putstr(db);
|
|
break;
|
|
|
|
#ifdef __FreeBSD__
|
|
case 's':
|
|
putstr(kerninfo.sysname);
|
|
break;
|
|
|
|
case 'm':
|
|
putstr(kerninfo.machine);
|
|
break;
|
|
|
|
case 'r':
|
|
putstr(kerninfo.release);
|
|
break;
|
|
|
|
case 'v':
|
|
putstr(kerninfo.version);
|
|
break;
|
|
#endif
|
|
|
|
case '%':
|
|
putchr('%');
|
|
break;
|
|
}
|
|
cp++;
|
|
}
|
|
}
|
|
|
|
#ifdef DIAGNOSTICS
|
|
/*
|
|
* Print telnet options and commands in plain text, if possible.
|
|
*/
|
|
void
|
|
printoption(fmt, option)
|
|
register char *fmt;
|
|
register int option;
|
|
{
|
|
if (TELOPT_OK(option))
|
|
output_data("%s %s\r\n", fmt, TELOPT(option));
|
|
else if (TELCMD_OK(option))
|
|
output_data("%s %s\r\n", fmt, TELCMD(option));
|
|
else
|
|
output_data("%s %d\r\n", fmt, option);
|
|
return;
|
|
}
|
|
|
|
void
|
|
printsub(direction, pointer, length)
|
|
char direction; /* '<' or '>' */
|
|
unsigned char *pointer; /* where suboption data sits */
|
|
int length; /* length of suboption data */
|
|
{
|
|
register int i = 0;
|
|
|
|
if (!(diagnostic & TD_OPTIONS))
|
|
return;
|
|
|
|
if (direction) {
|
|
output_data("td: %s suboption ",
|
|
direction == '<' ? "recv" : "send");
|
|
if (length >= 3) {
|
|
register int j;
|
|
|
|
i = pointer[length-2];
|
|
j = pointer[length-1];
|
|
|
|
if (i != IAC || j != SE) {
|
|
output_data("(terminated by ");
|
|
if (TELOPT_OK(i))
|
|
output_data("%s ", TELOPT(i));
|
|
else if (TELCMD_OK(i))
|
|
output_data("%s ", TELCMD(i));
|
|
else
|
|
output_data("%d ", i);
|
|
if (TELOPT_OK(j))
|
|
output_data("%s", TELOPT(j));
|
|
else if (TELCMD_OK(j))
|
|
output_data("%s", TELCMD(j));
|
|
else
|
|
output_data("%d", j);
|
|
output_data(", not IAC SE!) ");
|
|
}
|
|
}
|
|
length -= 2;
|
|
}
|
|
if (length < 1) {
|
|
output_data("(Empty suboption??\?)");
|
|
return;
|
|
}
|
|
switch (pointer[0]) {
|
|
case TELOPT_TTYPE:
|
|
output_data("TERMINAL-TYPE ");
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
output_data("IS \"%.*s\"", length-2, (char *)pointer+2);
|
|
break;
|
|
case TELQUAL_SEND:
|
|
output_data("SEND");
|
|
break;
|
|
default:
|
|
output_data(
|
|
"- unknown qualifier %d (0x%x).",
|
|
pointer[1], pointer[1]);
|
|
}
|
|
break;
|
|
case TELOPT_TSPEED:
|
|
output_data("TERMINAL-SPEED");
|
|
if (length < 2) {
|
|
output_data(" (empty suboption??\?)");
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
output_data(" IS %.*s", length-2, (char *)pointer+2);
|
|
break;
|
|
default:
|
|
if (pointer[1] == 1)
|
|
output_data(" SEND");
|
|
else
|
|
output_data(" %d (unknown)", pointer[1]);
|
|
for (i = 2; i < length; i++) {
|
|
output_data(" ?%d?", pointer[i]);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TELOPT_LFLOW:
|
|
output_data("TOGGLE-FLOW-CONTROL");
|
|
if (length < 2) {
|
|
output_data(" (empty suboption??\?)");
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case LFLOW_OFF:
|
|
output_data(" OFF"); break;
|
|
case LFLOW_ON:
|
|
output_data(" ON"); break;
|
|
case LFLOW_RESTART_ANY:
|
|
output_data(" RESTART-ANY"); break;
|
|
case LFLOW_RESTART_XON:
|
|
output_data(" RESTART-XON"); break;
|
|
default:
|
|
output_data(" %d (unknown)", pointer[1]);
|
|
}
|
|
for (i = 2; i < length; i++) {
|
|
output_data(" ?%d?", pointer[i]);
|
|
}
|
|
break;
|
|
|
|
case TELOPT_NAWS:
|
|
output_data("NAWS");
|
|
if (length < 2) {
|
|
output_data(" (empty suboption??\?)");
|
|
break;
|
|
}
|
|
if (length == 2) {
|
|
output_data(" ?%d?", pointer[1]);
|
|
break;
|
|
}
|
|
output_data(" %d %d (%d)",
|
|
pointer[1], pointer[2],
|
|
(int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
|
|
if (length == 4) {
|
|
output_data(" ?%d?", pointer[3]);
|
|
break;
|
|
}
|
|
output_data(" %d %d (%d)",
|
|
pointer[3], pointer[4],
|
|
(int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
|
|
for (i = 5; i < length; i++) {
|
|
output_data(" ?%d?", pointer[i]);
|
|
}
|
|
break;
|
|
|
|
case TELOPT_LINEMODE:
|
|
output_data("LINEMODE ");
|
|
if (length < 2) {
|
|
output_data(" (empty suboption??\?)");
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case WILL:
|
|
output_data("WILL ");
|
|
goto common;
|
|
case WONT:
|
|
output_data("WONT ");
|
|
goto common;
|
|
case DO:
|
|
output_data("DO ");
|
|
goto common;
|
|
case DONT:
|
|
output_data("DONT ");
|
|
common:
|
|
if (length < 3) {
|
|
output_data("(no option??\?)");
|
|
break;
|
|
}
|
|
switch (pointer[2]) {
|
|
case LM_FORWARDMASK:
|
|
output_data("Forward Mask");
|
|
for (i = 3; i < length; i++) {
|
|
output_data(" %x", pointer[i]);
|
|
}
|
|
break;
|
|
default:
|
|
output_data("%d (unknown)", pointer[2]);
|
|
for (i = 3; i < length; i++) {
|
|
output_data(" %d", pointer[i]);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LM_SLC:
|
|
output_data("SLC");
|
|
for (i = 2; i < length - 2; i += 3) {
|
|
if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
|
|
output_data(" %s", SLC_NAME(pointer[i+SLC_FUNC]));
|
|
else
|
|
output_data(" %d", pointer[i+SLC_FUNC]);
|
|
switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
|
|
case SLC_NOSUPPORT:
|
|
output_data(" NOSUPPORT"); break;
|
|
case SLC_CANTCHANGE:
|
|
output_data(" CANTCHANGE"); break;
|
|
case SLC_VARIABLE:
|
|
output_data(" VARIABLE"); break;
|
|
case SLC_DEFAULT:
|
|
output_data(" DEFAULT"); break;
|
|
}
|
|
output_data("%s%s%s",
|
|
pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
|
|
pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
|
|
pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
|
|
if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
|
|
SLC_FLUSHOUT| SLC_LEVELBITS)) {
|
|
output_data("(0x%x)", pointer[i+SLC_FLAGS]);
|
|
}
|
|
output_data(" %d;", pointer[i+SLC_VALUE]);
|
|
if ((pointer[i+SLC_VALUE] == IAC) &&
|
|
(pointer[i+SLC_VALUE+1] == IAC))
|
|
i++;
|
|
}
|
|
for (; i < length; i++) {
|
|
output_data(" ?%d?", pointer[i]);
|
|
}
|
|
break;
|
|
|
|
case LM_MODE:
|
|
output_data("MODE ");
|
|
if (length < 3) {
|
|
output_data("(no mode??\?)");
|
|
break;
|
|
}
|
|
{
|
|
char tbuf[32];
|
|
sprintf(tbuf, "%s%s%s%s%s",
|
|
pointer[2]&MODE_EDIT ? "|EDIT" : "",
|
|
pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
|
|
pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
|
|
pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
|
|
pointer[2]&MODE_ACK ? "|ACK" : "");
|
|
output_data("%s", tbuf[1] ? &tbuf[1] : "0");
|
|
}
|
|
if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) {
|
|
output_data(" (0x%x)", pointer[2]);
|
|
}
|
|
for (i = 3; i < length; i++) {
|
|
output_data(" ?0x%x?", pointer[i]);
|
|
}
|
|
break;
|
|
default:
|
|
output_data("%d (unknown)", pointer[1]);
|
|
for (i = 2; i < length; i++) {
|
|
output_data(" %d", pointer[i]);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case TELOPT_STATUS: {
|
|
register char *cp;
|
|
register int j, k;
|
|
|
|
output_data("STATUS");
|
|
|
|
switch (pointer[1]) {
|
|
default:
|
|
if (pointer[1] == TELQUAL_SEND)
|
|
output_data(" SEND");
|
|
else
|
|
output_data(" %d (unknown)", pointer[1]);
|
|
for (i = 2; i < length; i++) {
|
|
output_data(" ?%d?", pointer[i]);
|
|
}
|
|
break;
|
|
case TELQUAL_IS:
|
|
output_data(" IS\r\n");
|
|
|
|
for (i = 2; i < length; i++) {
|
|
switch(pointer[i]) {
|
|
case DO: cp = "DO"; goto common2;
|
|
case DONT: cp = "DONT"; goto common2;
|
|
case WILL: cp = "WILL"; goto common2;
|
|
case WONT: cp = "WONT"; goto common2;
|
|
common2:
|
|
i++;
|
|
if (TELOPT_OK(pointer[i]))
|
|
output_data(" %s %s", cp, TELOPT(pointer[i]));
|
|
else
|
|
output_data(" %s %d", cp, pointer[i]);
|
|
|
|
output_data("\r\n");
|
|
break;
|
|
|
|
case SB:
|
|
output_data(" SB ");
|
|
i++;
|
|
j = k = i;
|
|
while (j < length) {
|
|
if (pointer[j] == SE) {
|
|
if (j+1 == length)
|
|
break;
|
|
if (pointer[j+1] == SE)
|
|
j++;
|
|
else
|
|
break;
|
|
}
|
|
pointer[k++] = pointer[j++];
|
|
}
|
|
printsub(0, &pointer[i], k - i);
|
|
if (i < length) {
|
|
output_data(" SE");
|
|
i = j;
|
|
} else
|
|
i = j - 1;
|
|
|
|
output_data("\r\n");
|
|
|
|
break;
|
|
|
|
default:
|
|
output_data(" %d", pointer[i]);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case TELOPT_XDISPLOC:
|
|
output_data("X-DISPLAY-LOCATION ");
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
output_data("IS \"%.*s\"", length-2, (char *)pointer+2);
|
|
break;
|
|
case TELQUAL_SEND:
|
|
output_data("SEND");
|
|
break;
|
|
default:
|
|
output_data("- unknown qualifier %d (0x%x).",
|
|
pointer[1], pointer[1]);
|
|
}
|
|
break;
|
|
|
|
case TELOPT_NEW_ENVIRON:
|
|
output_data("NEW-ENVIRON ");
|
|
goto env_common1;
|
|
case TELOPT_OLD_ENVIRON:
|
|
output_data("OLD-ENVIRON");
|
|
env_common1:
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
output_data("IS ");
|
|
goto env_common;
|
|
case TELQUAL_SEND:
|
|
output_data("SEND ");
|
|
goto env_common;
|
|
case TELQUAL_INFO:
|
|
output_data("INFO ");
|
|
env_common:
|
|
{
|
|
register int noquote = 2;
|
|
for (i = 2; i < length; i++ ) {
|
|
switch (pointer[i]) {
|
|
case NEW_ENV_VAR:
|
|
output_data("\" VAR " + noquote);
|
|
noquote = 2;
|
|
break;
|
|
|
|
case NEW_ENV_VALUE:
|
|
output_data("\" VALUE " + noquote);
|
|
noquote = 2;
|
|
break;
|
|
|
|
case ENV_ESC:
|
|
output_data("\" ESC " + noquote);
|
|
noquote = 2;
|
|
break;
|
|
|
|
case ENV_USERVAR:
|
|
output_data("\" USERVAR " + noquote);
|
|
noquote = 2;
|
|
break;
|
|
|
|
default:
|
|
if (isprint(pointer[i]) && pointer[i] != '"') {
|
|
if (noquote) {
|
|
output_data("\"");
|
|
noquote = 0;
|
|
}
|
|
output_data("%c", pointer[i]);
|
|
} else {
|
|
output_data("\" %03o " + noquote,
|
|
pointer[i]);
|
|
noquote = 2;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!noquote)
|
|
output_data("\"");
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
if (TELOPT_OK(pointer[0]))
|
|
output_data("%s (unknown)", TELOPT(pointer[0]));
|
|
else
|
|
output_data("%d (unknown)", pointer[i]);
|
|
for (i = 1; i < length; i++) {
|
|
output_data(" %d", pointer[i]);
|
|
}
|
|
break;
|
|
}
|
|
output_data("\r\n");
|
|
}
|
|
|
|
/*
|
|
* Dump a data buffer in hex and ascii to the output data stream.
|
|
*/
|
|
void
|
|
printdata(tag, ptr, cnt)
|
|
register char *tag;
|
|
register char *ptr;
|
|
register int cnt;
|
|
{
|
|
register int i;
|
|
char xbuf[30];
|
|
|
|
while (cnt) {
|
|
/* flush net output buffer if no room for new data) */
|
|
if ((&netobuf[BUFSIZ] - nfrontp) < 80) {
|
|
netflush();
|
|
}
|
|
|
|
/* add a line of output */
|
|
output_data("%s: ", tag);
|
|
for (i = 0; i < 20 && cnt; i++) {
|
|
output_data("%02x", *ptr);
|
|
if (isprint(*ptr)) {
|
|
xbuf[i] = *ptr;
|
|
} else {
|
|
xbuf[i] = '.';
|
|
}
|
|
if (i % 2) {
|
|
output_data(" ");
|
|
}
|
|
cnt--;
|
|
ptr++;
|
|
}
|
|
xbuf[i] = '\0';
|
|
output_data(" %s\r\n", xbuf );
|
|
}
|
|
}
|
|
#endif /* DIAGNOSTICS */
|