auto import from //depot/cupcake/@135843
diff --git a/print-mpls.c b/print-mpls.c
new file mode 100644
index 0000000..9d54567
--- /dev/null
+++ b/print-mpls.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2001 WIDE Project. 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 project 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 PROJECT 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 PROJECT 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.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-mpls.c,v 1.13.2.1 2005/07/05 09:39:29 hannes Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "addrtoname.h"
+#include "interface.h"
+#include "extract.h" /* must come after interface.h */
+#include "mpls.h"
+
+static const char *mpls_labelname[] = {
+/*0*/ "IPv4 explicit NULL", "router alert", "IPv6 explicit NULL",
+ "implicit NULL", "rsvd",
+/*5*/ "rsvd", "rsvd", "rsvd", "rsvd", "rsvd",
+/*10*/ "rsvd", "rsvd", "rsvd", "rsvd", "rsvd",
+/*15*/ "rsvd",
+};
+
+/*
+ * RFC3032: MPLS label stack encoding
+ */
+void
+mpls_print(const u_char *bp, u_int length)
+{
+ const u_char *p;
+ u_int32_t label_entry;
+ u_int16_t label_stack_depth = 0;
+
+ p = bp;
+ printf("MPLS");
+ do {
+ TCHECK2(*p, sizeof(label_entry));
+ label_entry = EXTRACT_32BITS(p);
+ printf("%s(label %u",
+ label_stack_depth ? "\n\t" : " ",
+ MPLS_LABEL(label_entry));
+ label_stack_depth++;
+ if (vflag &&
+ MPLS_LABEL(label_entry) < sizeof(mpls_labelname) / sizeof(mpls_labelname[0]))
+ printf(" (%s)", mpls_labelname[MPLS_LABEL(label_entry)]);
+ printf(", exp %u", MPLS_EXP(label_entry));
+ if (MPLS_STACK(label_entry))
+ printf(", [S]");
+ printf(", ttl %u)", MPLS_TTL(label_entry));
+
+ p += sizeof(label_entry);
+ } while (!MPLS_STACK(label_entry));
+
+ switch (MPLS_LABEL(label_entry)) {
+ case 0: /* IPv4 explicit NULL label */
+ case 3: /* IPv4 implicit NULL label */
+ if (vflag>0) {
+ printf("\n\t");
+ ip_print(gndo, p, length - (p - bp));
+ }
+ else printf(", IP, length: %u",length);
+ break;
+#ifdef INET6
+ case 2: /* IPv6 explicit NULL label */
+ if (vflag>0) {
+ printf("\n\t");
+ ip6_print(p, length - (p - bp));
+ }
+ else printf(", IPv6, length: %u",length);
+ break;
+#endif
+ default:
+ /*
+ * Generally there's no indication of protocol in MPLS label
+ * encoding, however draft-hsmit-isis-aal5mux-00.txt describes
+ * a technique that looks at the first payload byte if the BOS (bottom of stack)
+ * bit is set and tries to determine the network layer protocol
+ * 0x45-0x4f is IPv4
+ * 0x60-0x6f is IPv6
+ * 0x81-0x83 is OSI (CLNP,ES-IS,IS-IS)
+ * this technique is sometimes known as NULL encapsulation
+ * and decoding is particularly useful for control-plane traffic [BGP]
+ * which cisco by default sends MPLS encapsulated
+ */
+
+ if (MPLS_STACK(label_entry)) { /* only do this if the stack bit is set */
+ switch(*p) {
+ case 0x45:
+ case 0x46:
+ case 0x47:
+ case 0x48:
+ case 0x49:
+ case 0x4a:
+ case 0x4b:
+ case 0x4c:
+ case 0x4d:
+ case 0x4e:
+ case 0x4f:
+ if (vflag>0) {
+ printf("\n\t");
+ ip_print(gndo, p, length - (p - bp));
+ }
+ else printf(", IP, length: %u",length);
+ break;
+#ifdef INET6
+ case 0x60:
+ case 0x61:
+ case 0x62:
+ case 0x63:
+ case 0x64:
+ case 0x65:
+ case 0x66:
+ case 0x67:
+ case 0x68:
+ case 0x69:
+ case 0x6a:
+ case 0x6b:
+ case 0x6c:
+ case 0x6d:
+ case 0x6e:
+ case 0x6f:
+ if (vflag>0) {
+ printf("\n\t");
+ ip6_print(p, length - (p - bp));
+ }
+ else printf(", IPv6, length: %u",length);
+ break;
+#endif
+ case 0x81:
+ case 0x82:
+ case 0x83:
+ if (vflag>0) {
+ printf("\n\t");
+ isoclns_print(p, length - (p - bp), length - (p - bp));
+ }
+ else printf(", OSI, length: %u",length);
+ break;
+ default:
+ /* ok bail out - we did not figure out what it is*/
+ break;
+ }
+ }
+ return;
+ }
+
+trunc:
+ printf("[|MPLS]");
+}
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */