1210 lines
28 KiB
C
1210 lines
28 KiB
C
/*
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* 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
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* 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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static const char sccsid[] = "@(#)utility.c 8.4 (Berkeley) 5/30/95";
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#endif /* not lint */
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#ifdef __FreeBSD__
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#include <locale.h>
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#endif
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#define PRINTOPTIONS
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#include "telnetd.h"
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#if defined(AUTHENTICATION)
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#include <libtelnet/auth.h>
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#endif
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#if defined(ENCRYPTION)
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#include <libtelnet/encrypt.h>
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#endif
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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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* 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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void
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ttloop()
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{
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void netflush();
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DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop\r\n");
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nfrontp += strlen(nfrontp);});
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if (nfrontp-nbackp) {
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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\n");
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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\n");
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exit(1);
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}
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DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop read %d chars\r\n", ncc);
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nfrontp += strlen(nfrontp);});
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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));
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if (value < 0) {
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fatalperror(pty, "select");
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}
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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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if ((n = pfrontp - pbackp) > 0) {
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DIAG((TD_REPORT | TD_PTYDATA),
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{ sprintf(nfrontp, "td: ptyflush %d chars\r\n", n);
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nfrontp += strlen(nfrontp); });
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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) {
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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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* 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
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* be the address of the character following the TELNET command
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* if the current address is a TELNET IAC ("I Am a Command")
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* character.
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*/
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char *
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nextitem(current)
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char *current;
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{
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if ((*current&0xff) != IAC) {
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return current+1;
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}
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switch (*(current+1)&0xff) {
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case DO:
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case DONT:
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case WILL:
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case WONT:
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return current+3;
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case SB: /* loop forever looking for the SE */
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{
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register char *look = current+2;
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for (;;) {
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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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}
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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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* 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
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* 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
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* 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;
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#define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \
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((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
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#ifdef ENCRYPTION
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thisitem = nclearto > netobuf ? nclearto : netobuf;
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#else /* ENCRYPTION */
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thisitem = netobuf;
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#endif /* ENCRYPTION */
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while ((next = nextitem(thisitem)) <= nbackp) {
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thisitem = next;
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}
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/* Now, thisitem is first before/at boundary. */
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#ifdef ENCRYPTION
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good = nclearto > netobuf ? nclearto : netobuf;
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#else /* ENCRYPTION */
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good = netobuf; /* where the good bytes go */
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#endif /* ENCRYPTION */
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while (nfrontp > thisitem) {
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if (wewant(thisitem)) {
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int length;
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next = thisitem;
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do {
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next = nextitem(next);
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} while (wewant(next) && (nfrontp > next));
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length = next-thisitem;
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memmove(good, thisitem, length);
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good += length;
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thisitem = next;
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} else {
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thisitem = nextitem(thisitem);
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}
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}
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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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/*
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* netflush
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* Send as much data as possible to the network,
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* handling requests for urgent data.
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*/
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void
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netflush()
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{
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int n;
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extern int not42;
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if ((n = nfrontp - nbackp) > 0) {
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DIAG(TD_REPORT,
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{ sprintf(nfrontp, "td: netflush %d chars\r\n", n);
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n += strlen(nfrontp); /* get count first */
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nfrontp += strlen(nfrontp); /* then move pointer */
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});
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#ifdef ENCRYPTION
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if (encrypt_output) {
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char *s = nclearto ? nclearto : nbackp;
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if (nfrontp - s > 0) {
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(*encrypt_output)((unsigned char *)s, nfrontp-s);
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nclearto = nfrontp;
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}
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}
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#endif /* ENCRYPTION */
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/*
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* if no urgent data, or if the other side appears to be an
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* 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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*/
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if ((neturg == 0) || (not42 == 0)) {
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n = write(net, nbackp, n); /* normal write */
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} else {
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n = neturg - nbackp;
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/*
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* In 4.2 (and 4.3) systems, there is some question about
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* what byte in a sendOOB operation is the "OOB" data.
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* To make ourselves compatible, we only send ONE byte
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* out of band, the one WE THINK should be OOB (though
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* we really have more the TCP philosophy of urgent data
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* rather than the Unix philosophy of OOB data).
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*/
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if (n > 1) {
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n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */
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} else {
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n = send(net, nbackp, n, MSG_OOB); /* URGENT data */
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}
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}
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}
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if (n < 0) {
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if (errno == EWOULDBLOCK || errno == EINTR)
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return;
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cleanup(0);
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}
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nbackp += n;
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#ifdef ENCRYPTION
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if (nbackp > nclearto)
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nclearto = 0;
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#endif /* ENCRYPTION */
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if (nbackp >= neturg) {
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neturg = 0;
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}
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if (nbackp == nfrontp) {
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nbackp = nfrontp = netobuf;
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#ifdef ENCRYPTION
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nclearto = 0;
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#endif /* ENCRYPTION */
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}
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return;
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} /* end of netflush */
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/*
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* writenet
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*
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* Just a handy little function to write a bit of raw data to the net.
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* It will force a transmit of the buffer if necessary
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*
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* arguments
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* ptr - A pointer to a character string to write
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* len - How many bytes to write
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*/
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void
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writenet(ptr, len)
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register unsigned char *ptr;
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register int len;
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{
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/* flush buffer if no room for new data) */
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if ((&netobuf[BUFSIZ] - nfrontp) < len) {
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/* if this fails, don't worry, buffer is a little big */
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netflush();
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}
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memmove(nfrontp, ptr, len);
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nfrontp += len;
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} /* end of writenet */
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/*
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* miscellaneous functions doing a variety of little jobs follow ...
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*/
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void
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fatal(f, msg)
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int f;
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char *msg;
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{
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char buf[BUFSIZ];
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(void) sprintf(buf, "telnetd: %s.\r\n", msg);
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#ifdef ENCRYPTION
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if (encrypt_output) {
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/*
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* Better turn off encryption first....
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* Hope it flushes...
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*/
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encrypt_send_end();
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netflush();
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}
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#endif /* ENCRYPTION */
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(void) write(f, buf, (int)strlen(buf));
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sleep(1); /*XXX*/
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exit(1);
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}
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void
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fatalperror(f, msg)
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int f;
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char *msg;
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{
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char buf[BUFSIZ], *strerror();
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(void) sprintf(buf, "%s: %s", msg, strerror(errno));
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fatal(f, buf);
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}
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char editedhost[32];
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void
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edithost(pat, host)
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register char *pat;
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register char *host;
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{
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register char *res = editedhost;
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char *strncpy();
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if (!pat)
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pat = "";
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while (*pat) {
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switch (*pat) {
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case '#':
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if (*host)
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host++;
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break;
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case '@':
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if (*host)
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*res++ = *host++;
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break;
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default:
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*res++ = *pat;
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break;
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}
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if (res == &editedhost[sizeof editedhost - 1]) {
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*res = '\0';
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return;
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}
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pat++;
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}
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if (*host)
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(void) strncpy(res, host,
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sizeof editedhost - (res - editedhost) -1);
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else
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*res = '\0';
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editedhost[sizeof editedhost - 1] = '\0';
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}
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static char *putlocation;
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void
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putstr(s)
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register char *s;
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{
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while (*s)
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putchr(*s++);
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}
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void
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putchr(cc)
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int cc;
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{
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*putlocation++ = cc;
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}
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#ifdef __FreeBSD__
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static char fmtstr[] = { "%+" };
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#else
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|
/*
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|
* This is split on two lines so that SCCS will not see the M
|
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* between two % signs and expand it...
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|
*/
|
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static char fmtstr[] = { "%l:%M\
|
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%P on %A, %d %B %Y" };
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#endif
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|
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void
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putf(cp, where)
|
|
register char *cp;
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|
char *where;
|
|
{
|
|
char *slash;
|
|
time_t t;
|
|
char db[100];
|
|
#ifdef STREAMSPTY
|
|
extern char *strchr();
|
|
#else
|
|
extern char *strrchr();
|
|
#endif
|
|
|
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putlocation = where;
|
|
|
|
while (*cp) {
|
|
if (*cp != '%') {
|
|
putchr(*cp++);
|
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continue;
|
|
}
|
|
switch (*++cp) {
|
|
|
|
case 't':
|
|
#ifdef STREAMSPTY
|
|
/* names are like /dev/pts/2 -- we want pts/2 */
|
|
slash = strchr(line+1, '/');
|
|
#else
|
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slash = strrchr(line, '/');
|
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#endif
|
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if (slash == (char *) 0)
|
|
putstr(line);
|
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else
|
|
putstr(&slash[1]);
|
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break;
|
|
|
|
case 'h':
|
|
putstr(editedhost);
|
|
break;
|
|
|
|
case 'd':
|
|
#ifdef __FreeBSD__
|
|
setlocale(LC_TIME, "");
|
|
#endif
|
|
(void)time(&t);
|
|
(void)strftime(db, sizeof(db), fmtstr, localtime(&t));
|
|
putstr(db);
|
|
break;
|
|
|
|
case '%':
|
|
putchr('%');
|
|
break;
|
|
}
|
|
cp++;
|
|
}
|
|
}
|
|
|
|
#ifdef DIAGNOSTICS
|
|
/*
|
|
* Print telnet options and commands in plain text, if possible.
|
|
*/
|
|
void
|
|
printoption(fmt, option)
|
|
register char *fmt;
|
|
register int option;
|
|
{
|
|
if (TELOPT_OK(option))
|
|
sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option));
|
|
else if (TELCMD_OK(option))
|
|
sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option));
|
|
else
|
|
sprintf(nfrontp, "%s %d\r\n", fmt, option);
|
|
nfrontp += strlen(nfrontp);
|
|
return;
|
|
}
|
|
|
|
void
|
|
printsub(direction, pointer, length)
|
|
char direction; /* '<' or '>' */
|
|
unsigned char *pointer; /* where suboption data sits */
|
|
int length; /* length of suboption data */
|
|
{
|
|
register int i;
|
|
char buf[512];
|
|
|
|
if (!(diagnostic & TD_OPTIONS))
|
|
return;
|
|
|
|
if (direction) {
|
|
sprintf(nfrontp, "td: %s suboption ",
|
|
direction == '<' ? "recv" : "send");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length >= 3) {
|
|
register int j;
|
|
|
|
i = pointer[length-2];
|
|
j = pointer[length-1];
|
|
|
|
if (i != IAC || j != SE) {
|
|
sprintf(nfrontp, "(terminated by ");
|
|
nfrontp += strlen(nfrontp);
|
|
if (TELOPT_OK(i))
|
|
sprintf(nfrontp, "%s ", TELOPT(i));
|
|
else if (TELCMD_OK(i))
|
|
sprintf(nfrontp, "%s ", TELCMD(i));
|
|
else
|
|
sprintf(nfrontp, "%d ", i);
|
|
nfrontp += strlen(nfrontp);
|
|
if (TELOPT_OK(j))
|
|
sprintf(nfrontp, "%s", TELOPT(j));
|
|
else if (TELCMD_OK(j))
|
|
sprintf(nfrontp, "%s", TELCMD(j));
|
|
else
|
|
sprintf(nfrontp, "%d", j);
|
|
nfrontp += strlen(nfrontp);
|
|
sprintf(nfrontp, ", not IAC SE!) ");
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
}
|
|
length -= 2;
|
|
}
|
|
if (length < 1) {
|
|
sprintf(nfrontp, "(Empty suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
return;
|
|
}
|
|
switch (pointer[0]) {
|
|
case TELOPT_TTYPE:
|
|
sprintf(nfrontp, "TERMINAL-TYPE ");
|
|
nfrontp += strlen(nfrontp);
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2);
|
|
break;
|
|
case TELQUAL_SEND:
|
|
sprintf(nfrontp, "SEND");
|
|
break;
|
|
default:
|
|
sprintf(nfrontp,
|
|
"- unknown qualifier %d (0x%x).",
|
|
pointer[1], pointer[1]);
|
|
}
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
case TELOPT_TSPEED:
|
|
sprintf(nfrontp, "TERMINAL-SPEED");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 2) {
|
|
sprintf(nfrontp, " (empty suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2);
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
default:
|
|
if (pointer[1] == 1)
|
|
sprintf(nfrontp, " SEND");
|
|
else
|
|
sprintf(nfrontp, " %d (unknown)", pointer[1]);
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 2; i < length; i++) {
|
|
sprintf(nfrontp, " ?%d?", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TELOPT_LFLOW:
|
|
sprintf(nfrontp, "TOGGLE-FLOW-CONTROL");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 2) {
|
|
sprintf(nfrontp, " (empty suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case LFLOW_OFF:
|
|
sprintf(nfrontp, " OFF"); break;
|
|
case LFLOW_ON:
|
|
sprintf(nfrontp, " ON"); break;
|
|
case LFLOW_RESTART_ANY:
|
|
sprintf(nfrontp, " RESTART-ANY"); break;
|
|
case LFLOW_RESTART_XON:
|
|
sprintf(nfrontp, " RESTART-XON"); break;
|
|
default:
|
|
sprintf(nfrontp, " %d (unknown)", pointer[1]);
|
|
}
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 2; i < length; i++) {
|
|
sprintf(nfrontp, " ?%d?", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
|
|
case TELOPT_NAWS:
|
|
sprintf(nfrontp, "NAWS");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 2) {
|
|
sprintf(nfrontp, " (empty suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
if (length == 2) {
|
|
sprintf(nfrontp, " ?%d?", pointer[1]);
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
sprintf(nfrontp, " %d %d (%d)",
|
|
pointer[1], pointer[2],
|
|
(int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
|
|
nfrontp += strlen(nfrontp);
|
|
if (length == 4) {
|
|
sprintf(nfrontp, " ?%d?", pointer[3]);
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
sprintf(nfrontp, " %d %d (%d)",
|
|
pointer[3], pointer[4],
|
|
(int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 5; i < length; i++) {
|
|
sprintf(nfrontp, " ?%d?", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
|
|
case TELOPT_LINEMODE:
|
|
sprintf(nfrontp, "LINEMODE ");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 2) {
|
|
sprintf(nfrontp, " (empty suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case WILL:
|
|
sprintf(nfrontp, "WILL ");
|
|
goto common;
|
|
case WONT:
|
|
sprintf(nfrontp, "WONT ");
|
|
goto common;
|
|
case DO:
|
|
sprintf(nfrontp, "DO ");
|
|
goto common;
|
|
case DONT:
|
|
sprintf(nfrontp, "DONT ");
|
|
common:
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 3) {
|
|
sprintf(nfrontp, "(no option??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
switch (pointer[2]) {
|
|
case LM_FORWARDMASK:
|
|
sprintf(nfrontp, "Forward Mask");
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 3; i < length; i++) {
|
|
sprintf(nfrontp, " %x", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
default:
|
|
sprintf(nfrontp, "%d (unknown)", pointer[2]);
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 3; i < length; i++) {
|
|
sprintf(nfrontp, " %d", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LM_SLC:
|
|
sprintf(nfrontp, "SLC");
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 2; i < length - 2; i += 3) {
|
|
if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
|
|
sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
|
|
else
|
|
sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]);
|
|
nfrontp += strlen(nfrontp);
|
|
switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
|
|
case SLC_NOSUPPORT:
|
|
sprintf(nfrontp, " NOSUPPORT"); break;
|
|
case SLC_CANTCHANGE:
|
|
sprintf(nfrontp, " CANTCHANGE"); break;
|
|
case SLC_VARIABLE:
|
|
sprintf(nfrontp, " VARIABLE"); break;
|
|
case SLC_DEFAULT:
|
|
sprintf(nfrontp, " DEFAULT"); break;
|
|
}
|
|
nfrontp += strlen(nfrontp);
|
|
sprintf(nfrontp, "%s%s%s",
|
|
pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
|
|
pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
|
|
pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
|
|
nfrontp += strlen(nfrontp);
|
|
if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
|
|
SLC_FLUSHOUT| SLC_LEVELBITS)) {
|
|
sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]);
|
|
nfrontp += strlen(nfrontp);
|
|
if ((pointer[i+SLC_VALUE] == IAC) &&
|
|
(pointer[i+SLC_VALUE+1] == IAC))
|
|
i++;
|
|
}
|
|
for (; i < length; i++) {
|
|
sprintf(nfrontp, " ?%d?", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
|
|
case LM_MODE:
|
|
sprintf(nfrontp, "MODE ");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 3) {
|
|
sprintf(nfrontp, "(no mode??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
{
|
|
char tbuf[32];
|
|
sprintf(tbuf, "%s%s%s%s%s",
|
|
pointer[2]&MODE_EDIT ? "|EDIT" : "",
|
|
pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
|
|
pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
|
|
pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
|
|
pointer[2]&MODE_ACK ? "|ACK" : "");
|
|
sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0");
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) {
|
|
sprintf(nfrontp, " (0x%x)", pointer[2]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
for (i = 3; i < length; i++) {
|
|
sprintf(nfrontp, " ?0x%x?", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
default:
|
|
sprintf(nfrontp, "%d (unknown)", pointer[1]);
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 2; i < length; i++) {
|
|
sprintf(nfrontp, " %d", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case TELOPT_STATUS: {
|
|
register char *cp;
|
|
register int j, k;
|
|
|
|
sprintf(nfrontp, "STATUS");
|
|
nfrontp += strlen(nfrontp);
|
|
|
|
switch (pointer[1]) {
|
|
default:
|
|
if (pointer[1] == TELQUAL_SEND)
|
|
sprintf(nfrontp, " SEND");
|
|
else
|
|
sprintf(nfrontp, " %d (unknown)", pointer[1]);
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 2; i < length; i++) {
|
|
sprintf(nfrontp, " ?%d?", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
case TELQUAL_IS:
|
|
sprintf(nfrontp, " IS\r\n");
|
|
nfrontp += strlen(nfrontp);
|
|
|
|
for (i = 2; i < length; i++) {
|
|
switch(pointer[i]) {
|
|
case DO: cp = "DO"; goto common2;
|
|
case DONT: cp = "DONT"; goto common2;
|
|
case WILL: cp = "WILL"; goto common2;
|
|
case WONT: cp = "WONT"; goto common2;
|
|
common2:
|
|
i++;
|
|
if (TELOPT_OK(pointer[i]))
|
|
sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i]));
|
|
else
|
|
sprintf(nfrontp, " %s %d", cp, pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
|
|
sprintf(nfrontp, "\r\n");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case SB:
|
|
sprintf(nfrontp, " SB ");
|
|
nfrontp += strlen(nfrontp);
|
|
i++;
|
|
j = k = i;
|
|
while (j < length) {
|
|
if (pointer[j] == SE) {
|
|
if (j+1 == length)
|
|
break;
|
|
if (pointer[j+1] == SE)
|
|
j++;
|
|
else
|
|
break;
|
|
}
|
|
pointer[k++] = pointer[j++];
|
|
}
|
|
printsub(0, &pointer[i], k - i);
|
|
if (i < length) {
|
|
sprintf(nfrontp, " SE");
|
|
nfrontp += strlen(nfrontp);
|
|
i = j;
|
|
} else
|
|
i = j - 1;
|
|
|
|
sprintf(nfrontp, "\r\n");
|
|
nfrontp += strlen(nfrontp);
|
|
|
|
break;
|
|
|
|
default:
|
|
sprintf(nfrontp, " %d", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case TELOPT_XDISPLOC:
|
|
sprintf(nfrontp, "X-DISPLAY-LOCATION ");
|
|
nfrontp += strlen(nfrontp);
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2);
|
|
break;
|
|
case TELQUAL_SEND:
|
|
sprintf(nfrontp, "SEND");
|
|
break;
|
|
default:
|
|
sprintf(nfrontp, "- unknown qualifier %d (0x%x).",
|
|
pointer[1], pointer[1]);
|
|
}
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case TELOPT_NEW_ENVIRON:
|
|
sprintf(nfrontp, "NEW-ENVIRON ");
|
|
goto env_common1;
|
|
case TELOPT_OLD_ENVIRON:
|
|
sprintf(nfrontp, "OLD-ENVIRON");
|
|
env_common1:
|
|
nfrontp += strlen(nfrontp);
|
|
switch (pointer[1]) {
|
|
case TELQUAL_IS:
|
|
sprintf(nfrontp, "IS ");
|
|
goto env_common;
|
|
case TELQUAL_SEND:
|
|
sprintf(nfrontp, "SEND ");
|
|
goto env_common;
|
|
case TELQUAL_INFO:
|
|
sprintf(nfrontp, "INFO ");
|
|
env_common:
|
|
nfrontp += strlen(nfrontp);
|
|
{
|
|
register int noquote = 2;
|
|
for (i = 2; i < length; i++ ) {
|
|
switch (pointer[i]) {
|
|
case NEW_ENV_VAR:
|
|
sprintf(nfrontp, "\" VAR " + noquote);
|
|
nfrontp += strlen(nfrontp);
|
|
noquote = 2;
|
|
break;
|
|
|
|
case NEW_ENV_VALUE:
|
|
sprintf(nfrontp, "\" VALUE " + noquote);
|
|
nfrontp += strlen(nfrontp);
|
|
noquote = 2;
|
|
break;
|
|
|
|
case ENV_ESC:
|
|
sprintf(nfrontp, "\" ESC " + noquote);
|
|
nfrontp += strlen(nfrontp);
|
|
noquote = 2;
|
|
break;
|
|
|
|
case ENV_USERVAR:
|
|
sprintf(nfrontp, "\" USERVAR " + noquote);
|
|
nfrontp += strlen(nfrontp);
|
|
noquote = 2;
|
|
break;
|
|
|
|
default:
|
|
if (isprint(pointer[i]) && pointer[i] != '"') {
|
|
if (noquote) {
|
|
*nfrontp++ = '"';
|
|
noquote = 0;
|
|
}
|
|
*nfrontp++ = pointer[i];
|
|
} else {
|
|
sprintf(nfrontp, "\" %03o " + noquote,
|
|
pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
noquote = 2;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!noquote)
|
|
*nfrontp++ = '"';
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
#if defined(AUTHENTICATION)
|
|
case TELOPT_AUTHENTICATION:
|
|
sprintf(nfrontp, "AUTHENTICATION");
|
|
nfrontp += strlen(nfrontp);
|
|
|
|
if (length < 2) {
|
|
sprintf(nfrontp, " (empty suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case TELQUAL_REPLY:
|
|
case TELQUAL_IS:
|
|
sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ?
|
|
"IS" : "REPLY");
|
|
nfrontp += strlen(nfrontp);
|
|
if (AUTHTYPE_NAME_OK(pointer[2]))
|
|
sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2]));
|
|
else
|
|
sprintf(nfrontp, "%d ", pointer[2]);
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 3) {
|
|
sprintf(nfrontp, "(partial suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
sprintf(nfrontp, "%s|%s",
|
|
((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
|
|
"CLIENT" : "SERVER",
|
|
((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
|
|
"MUTUAL" : "ONE-WAY");
|
|
nfrontp += strlen(nfrontp);
|
|
|
|
auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
|
|
sprintf(nfrontp, "%s", buf);
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case TELQUAL_SEND:
|
|
i = 2;
|
|
sprintf(nfrontp, " SEND ");
|
|
nfrontp += strlen(nfrontp);
|
|
while (i < length) {
|
|
if (AUTHTYPE_NAME_OK(pointer[i]))
|
|
sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i]));
|
|
else
|
|
sprintf(nfrontp, "%d ", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
if (++i >= length) {
|
|
sprintf(nfrontp, "(partial suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
sprintf(nfrontp, "%s|%s ",
|
|
((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
|
|
"CLIENT" : "SERVER",
|
|
((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
|
|
"MUTUAL" : "ONE-WAY");
|
|
nfrontp += strlen(nfrontp);
|
|
++i;
|
|
}
|
|
break;
|
|
|
|
case TELQUAL_NAME:
|
|
i = 2;
|
|
sprintf(nfrontp, " NAME \"");
|
|
nfrontp += strlen(nfrontp);
|
|
while (i < length)
|
|
*nfrontp += pointer[i++];
|
|
*nfrontp += '"';
|
|
break;
|
|
|
|
default:
|
|
for (i = 2; i < length; i++) {
|
|
sprintf(nfrontp, " ?%d?", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
#ifdef ENCRYPTION
|
|
case TELOPT_ENCRYPT:
|
|
sprintf(nfrontp, "ENCRYPT");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 2) {
|
|
sprintf(nfrontp, " (empty suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
switch (pointer[1]) {
|
|
case ENCRYPT_START:
|
|
sprintf(nfrontp, " START");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case ENCRYPT_END:
|
|
sprintf(nfrontp, " END");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case ENCRYPT_REQSTART:
|
|
sprintf(nfrontp, " REQUEST-START");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case ENCRYPT_REQEND:
|
|
sprintf(nfrontp, " REQUEST-END");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case ENCRYPT_IS:
|
|
case ENCRYPT_REPLY:
|
|
sprintf(nfrontp, " %s ", (pointer[1] == ENCRYPT_IS) ?
|
|
"IS" : "REPLY");
|
|
nfrontp += strlen(nfrontp);
|
|
if (length < 3) {
|
|
sprintf(nfrontp, " (partial suboption??\?)");
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
}
|
|
if (ENCTYPE_NAME_OK(pointer[2]))
|
|
sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[2]));
|
|
else
|
|
sprintf(nfrontp, " %d (unknown)", pointer[2]);
|
|
nfrontp += strlen(nfrontp);
|
|
|
|
encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf));
|
|
sprintf(nfrontp, "%s", buf);
|
|
nfrontp += strlen(nfrontp);
|
|
break;
|
|
|
|
case ENCRYPT_SUPPORT:
|
|
i = 2;
|
|
sprintf(nfrontp, " SUPPORT ");
|
|
nfrontp += strlen(nfrontp);
|
|
while (i < length) {
|
|
if (ENCTYPE_NAME_OK(pointer[i]))
|
|
sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[i]));
|
|
else
|
|
sprintf(nfrontp, "%d ", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
i++;
|
|
}
|
|
break;
|
|
|
|
case ENCRYPT_ENC_KEYID:
|
|
sprintf(nfrontp, " ENC_KEYID");
|
|
nfrontp += strlen(nfrontp);
|
|
goto encommon;
|
|
|
|
case ENCRYPT_DEC_KEYID:
|
|
sprintf(nfrontp, " DEC_KEYID");
|
|
nfrontp += strlen(nfrontp);
|
|
goto encommon;
|
|
|
|
default:
|
|
sprintf(nfrontp, " %d (unknown)", pointer[1]);
|
|
nfrontp += strlen(nfrontp);
|
|
encommon:
|
|
for (i = 2; i < length; i++) {
|
|
sprintf(nfrontp, " %d", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
#endif /* ENCRYPTION */
|
|
|
|
default:
|
|
if (TELOPT_OK(pointer[0]))
|
|
sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0]));
|
|
else
|
|
sprintf(nfrontp, "%d (unknown)", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 1; i < length; i++) {
|
|
sprintf(nfrontp, " %d", pointer[i]);
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
break;
|
|
}
|
|
sprintf(nfrontp, "\r\n");
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
|
|
/*
|
|
* Dump a data buffer in hex and ascii to the output data stream.
|
|
*/
|
|
void
|
|
printdata(tag, ptr, cnt)
|
|
register char *tag;
|
|
register char *ptr;
|
|
register int cnt;
|
|
{
|
|
register int i;
|
|
char xbuf[30];
|
|
|
|
while (cnt) {
|
|
/* flush net output buffer if no room for new data) */
|
|
if ((&netobuf[BUFSIZ] - nfrontp) < 80) {
|
|
netflush();
|
|
}
|
|
|
|
/* add a line of output */
|
|
sprintf(nfrontp, "%s: ", tag);
|
|
nfrontp += strlen(nfrontp);
|
|
for (i = 0; i < 20 && cnt; i++) {
|
|
sprintf(nfrontp, "%02x", *ptr);
|
|
nfrontp += strlen(nfrontp);
|
|
if (isprint(*ptr)) {
|
|
xbuf[i] = *ptr;
|
|
} else {
|
|
xbuf[i] = '.';
|
|
}
|
|
if (i % 2) {
|
|
*nfrontp = ' ';
|
|
nfrontp++;
|
|
}
|
|
cnt--;
|
|
ptr++;
|
|
}
|
|
xbuf[i] = '\0';
|
|
sprintf(nfrontp, " %s\r\n", xbuf );
|
|
nfrontp += strlen(nfrontp);
|
|
}
|
|
}
|
|
#endif /* DIAGNOSTICS */
|