auto import from //depot/cupcake/@135843
diff --git a/print-telnet.c b/print-telnet.c
new file mode 100644
index 0000000..7888727
--- /dev/null
+++ b/print-telnet.c
@@ -0,0 +1,267 @@
+/* $NetBSD: print-telnet.c,v 1.2 1999/10/11 12:40:12 sjg Exp $ */
+
+/*-
+ * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Simon J. Gerraty.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+/*
+ * @(#)Copyright (c) 1994, Simon J. Gerraty.
+ *
+ * This is free software. It comes with NO WARRANTY.
+ * Permission to use, modify and distribute this source code
+ * is granted subject to the following conditions.
+ * 1/ that the above copyright notice and this notice
+ * are preserved in all copies.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-telnet.c,v 1.24 2003/12/29 11:05:10 hannes Exp $";
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+
+#define TELCMDS
+#define TELOPTS
+#include "telnet.h"
+
+/* normal */
+static const char *cmds[] = {
+ "IS", "SEND", "INFO",
+};
+
+/* 37: Authentication */
+static const char *authcmd[] = {
+ "IS", "SEND", "REPLY", "NAME",
+};
+static const char *authtype[] = {
+ "NULL", "KERBEROS_V4", "KERBEROS_V5", "SPX", "MINK",
+ "SRP", "RSA", "SSL", NULL, NULL,
+ "LOKI", "SSA", "KEA_SJ", "KEA_SJ_INTEG", "DSS",
+ "NTLM",
+};
+
+/* 38: Encryption */
+static const char *enccmd[] = {
+ "IS", "SUPPORT", "REPLY", "START", "END",
+ "REQUEST-START", "REQUEST-END", "END_KEYID", "DEC_KEYID",
+};
+static const char *enctype[] = {
+ "NULL", "DES_CFB64", "DES_OFB64", "DES3_CFB64", "DES3_OFB64",
+ NULL, "CAST5_40_CFB64", "CAST5_40_OFB64", "CAST128_CFB64", "CAST128_OFB64",
+};
+
+#define STR_OR_ID(x, tab) \
+ (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
+
+static char *
+numstr(int x)
+{
+ static char buf[20];
+
+ snprintf(buf, sizeof(buf), "%#x", x);
+ return buf;
+}
+
+/* sp points to IAC byte */
+static int
+telnet_parse(const u_char *sp, u_int length, int print)
+{
+ int i, x;
+ u_int c;
+ const u_char *osp, *p;
+#define FETCH(c, sp, length) \
+ do { \
+ if (length < 1) \
+ goto pktend; \
+ TCHECK(*sp); \
+ c = *sp++; \
+ length--; \
+ } while (0)
+
+ osp = sp;
+
+ FETCH(c, sp, length);
+ if (c != IAC)
+ goto pktend;
+ FETCH(c, sp, length);
+ if (c == IAC) { /* <IAC><IAC>! */
+ if (print)
+ printf("IAC IAC");
+ goto done;
+ }
+
+ i = c - TELCMD_FIRST;
+ if (i < 0 || i > IAC - TELCMD_FIRST)
+ goto pktend;
+
+ switch (c) {
+ case DONT:
+ case DO:
+ case WONT:
+ case WILL:
+ case SB:
+ /* DONT/DO/WONT/WILL x */
+ FETCH(x, sp, length);
+ if (x >= 0 && x < NTELOPTS) {
+ if (print)
+ (void)printf("%s %s", telcmds[i], telopts[x]);
+ } else {
+ if (print)
+ (void)printf("%s %#x", telcmds[i], x);
+ }
+ if (c != SB)
+ break;
+ /* IAC SB .... IAC SE */
+ p = sp;
+ while (length > (u_int)(p + 1 - sp)) {
+ if (p[0] == IAC && p[1] == SE)
+ break;
+ p++;
+ }
+ if (*p != IAC)
+ goto pktend;
+
+ switch (x) {
+ case TELOPT_AUTHENTICATION:
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, authcmd));
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, authtype));
+ break;
+ case TELOPT_ENCRYPT:
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, enccmd));
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, enctype));
+ break;
+ default:
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, cmds));
+ break;
+ }
+ while (p > sp) {
+ FETCH(x, sp, length);
+ if (print)
+ (void)printf(" %#x", x);
+ }
+ /* terminating IAC SE */
+ if (print)
+ (void)printf(" SE");
+ sp += 2;
+ length -= 2;
+ break;
+ default:
+ if (print)
+ (void)printf("%s", telcmds[i]);
+ goto done;
+ }
+
+done:
+ return sp - osp;
+
+trunc:
+ (void)printf("[|telnet]");
+pktend:
+ return -1;
+#undef FETCH
+}
+
+void
+telnet_print(const u_char *sp, u_int length)
+{
+ int first = 1;
+ const u_char *osp;
+ int l;
+
+ osp = sp;
+
+ while (length > 0 && *sp == IAC) {
+ l = telnet_parse(sp, length, 0);
+ if (l < 0)
+ break;
+
+ /*
+ * now print it
+ */
+ if (Xflag && 2 < vflag) {
+ if (first)
+ printf("\nTelnet:");
+ hex_print_with_offset("\n", sp, l, sp - osp);
+ if (l > 8)
+ printf("\n\t\t\t\t");
+ else
+ printf("%*s\t", (8 - l) * 3, "");
+ } else
+ printf("%s", (first) ? " [telnet " : ", ");
+
+ (void)telnet_parse(sp, length, 1);
+ first = 0;
+
+ sp += l;
+ length -= l;
+ }
+ if (!first) {
+ if (Xflag && 2 < vflag)
+ printf("\n");
+ else
+ printf("]");
+ }
+}