Add tcpdump and libpcap.

- Update the file builder generator to handle generator specific cflags and
  includes. The tcpdump and libpcap have localised headers and need specific
  headers paths to see them. There are also module specific flags and these
  need to be passed to the lex and yacc generators.

- Add the tcpdump support.

1 files changed, 229 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-mpls.c b/freebsd/contrib/tcpdump/print-mpls.c
new file mode 100644
index 00000000..3a755f77
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-mpls.c
@@ -0,0 +1,229 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * 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 1.14 2005-07-05 09:38:19 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",
+};
+
+enum mpls_packet_type {
+	PT_UNKNOWN,
+	PT_IPV4,
+	PT_IPV6,
+	PT_OSI
+};
+
+/*
+ * 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;
+	enum mpls_packet_type pt = PT_UNKNOWN;
+
+	p = bp;
+	printf("MPLS");
+	do {
+		TCHECK2(*p, sizeof(label_entry));
+		label_entry = EXTRACT_32BITS(p);
+		printf("%s(label %u",
+		       (label_stack_depth && vflag) ? "\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));
+
+	/*
+	 * Try to figure out the packet type.
+	 */
+	switch (MPLS_LABEL(label_entry)) {
+
+	case 0:	/* IPv4 explicit NULL label */
+	case 3:	/* IPv4 implicit NULL label */
+		pt = PT_IPV4;
+		break;
+
+	case 2:	/* IPv6 explicit NULL label */
+		pt = PT_IPV6;
+		break;
+
+	default:
+		/*
+		 * Generally there's no indication of protocol in MPLS label
+		 * encoding.
+		 *
+		 * However, draft-hsmit-isis-aal5mux-00.txt describes a
+		 * technique for encapsulating IS-IS and IP traffic on the
+		 * same ATM virtual circuit; you look at the first payload
+		 * byte to determine the network layer protocol, based on
+		 * the fact that
+		 *
+		 *	1) the first byte of an IP header is 0x45-0x4f
+		 *	   for IPv4 and 0x60-0x6f for IPv6;
+		 *
+		 *	2) the first byte of an OSI CLNP packet is 0x81,
+		 *	   the first byte of an OSI ES-IS packet is 0x82,
+		 *	   and the first byte of an OSI IS-IS packet is
+		 *	   0x83;
+		 *
+		 * so the network layer protocol can be inferred from the
+		 * first byte of the packet, if the protocol is one of the
+		 * ones listed above.
+		 *
+		 * Cisco sends control-plane traffic MPLS-encapsulated in
+		 * this fashion.
+		 */
+		switch(*p) {
+
+		case 0x45:
+		case 0x46:
+		case 0x47:
+		case 0x48:
+		case 0x49:
+		case 0x4a:
+		case 0x4b:
+		case 0x4c:
+		case 0x4d:
+		case 0x4e:
+		case 0x4f:
+			pt = PT_IPV4;
+			break;
+				
+		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:
+			pt = PT_IPV6;
+			break;
+
+		case 0x81:
+		case 0x82:
+		case 0x83:
+			pt = PT_OSI;
+			break;
+
+		default:
+			/* ok bail out - we did not figure out what it is*/
+			break;
+		}
+	}
+
+	/*
+	 * Print the payload.
+	 */
+	if (pt == PT_UNKNOWN) {
+		if (!suppress_default_print)
+			default_print(p, length - (p - bp));
+		return;
+	}
+	if (vflag)
+		printf("\n\t");
+	else
+		printf(" ");
+	switch (pt) {
+
+	case PT_IPV4:
+		ip_print(gndo, p, length - (p - bp));
+		break;
+
+	case PT_IPV6:
+#ifdef INET6
+		ip6_print(gndo, p, length - (p - bp));
+#else
+		printf("IPv6, length: %u", length);
+#endif
+		break;
+
+	case PT_OSI:
+		isoclns_print(p, length - (p - bp), length - (p - bp));
+		break;
+
+	default:
+		break;
+	}
+	return;
+
+trunc:
+	printf("[|MPLS]");
+}
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */