Import tcpdump 3.7.1, from

 http://www.tcpdump.org/release/tcpdump-3.7.1.tar.gz

1 files changed, 123 insertions, 0 deletions

diff --git a/contrib/tcpdump/print-mpls.c b/contrib/tcpdump/print-mpls.c
new file mode 100644
index 0000000..eb03705
--- /dev/null
+++ b/contrib/tcpdump/print-mpls.c
@@ -0,0 +1,123 @@
+/*
+ * 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[] =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-mpls.c,v 1.2 2001/06/26 06:24:57 guy Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "addrtoname.h"
+#include "interface.h"
+#include "extract.h"			/* must come after interface.h */
+
+#define LABEL_MASK	0xfffff000
+#define LABEL_SHIFT	12
+#define	EXP_MASK	0x00000e00
+#define EXP_SHIFT	9
+#define	STACK_MASK	0x00000100
+#define STACK_SHIFT	8
+#define TTL_MASK	0x000000ff
+#define TTL_SHIFT	0
+
+#define MPLS_LABEL(x)	(((x) & LABEL_MASK) >> LABEL_SHIFT)
+#define MPLS_EXP(x)	(((x) & EXP_MASK) >> EXP_SHIFT)
+#define MPLS_STACK(x)	(((x) & STACK_MASK) >> STACK_SHIFT)
+#define MPLS_TTL(x)	(((x) & TTL_MASK) >> TTL_SHIFT)
+
+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 v;
+
+	p = bp;
+	printf("MPLS");
+	TCHECK2(*p, sizeof(v));
+	memcpy(&v, p, sizeof(v));
+	v = (u_int32_t)ntohl(v);
+	printf(" (");	/*)*/
+	printf("label 0x%x", MPLS_LABEL(v));
+	if (vflag &&
+	    MPLS_LABEL(v) < sizeof(mpls_labelname) / sizeof(mpls_labelname[0]))
+		printf("(%s)", mpls_labelname[MPLS_LABEL(v)]);
+	if (MPLS_EXP(v))
+		printf(" exp 0x%x", MPLS_EXP(v));
+	if (MPLS_STACK(v))
+		printf("[S]");
+	printf(" TTL %u", MPLS_TTL(v));
+	/*(*/
+	printf(")");
+
+	p += sizeof(v);
+
+	switch (MPLS_LABEL(v)) {
+	case 0:	/* IPv4 explicit NULL label */
+		ip_print(p, length - (p - bp));
+		break;
+#ifdef INET6
+	case 2:	/* IPv6 explicit NULL label */
+		ip6_print(p, length - (p - bp));
+		break;
+#endif
+	default:
+		/*
+		 * Since there's no indication of protocol in MPLS label
+		 * encoding, we can print nothing further.
+		 */
+		return;
+	}
+
+trunc:
+	printf("[|MPLS]");
+}