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, 405 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-gre.c b/freebsd/contrib/tcpdump/print-gre.c
new file mode 100644
index 00000000..a3e6c315
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-gre.c
@@ -0,0 +1,405 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*	$OpenBSD: print-gre.c,v 1.6 2002/10/30 03:04:04 fgsch Exp $	*/
+
+/*
+ * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Jason L. Wright
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/*
+ * tcpdump filter for GRE - Generic Routing Encapsulation
+ * RFC1701 (GRE), RFC1702 (GRE IPv4), and RFC2637 (Enhanced GRE)
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-gre.c,v 1.28 2005-04-06 21:32:39 mcr Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+#include "ip.h"
+#include "ethertype.h"
+
+#define	GRE_CP		0x8000		/* checksum present */
+#define	GRE_RP		0x4000		/* routing present */
+#define	GRE_KP		0x2000		/* key present */
+#define	GRE_SP		0x1000		/* sequence# present */
+#define	GRE_sP		0x0800		/* source routing */
+#define	GRE_RECRS	0x0700		/* recursion count */
+#define	GRE_AP		0x0080		/* acknowledgment# present */
+
+struct tok gre_flag_values[] = {
+    { GRE_CP, "checksum present"},
+    { GRE_RP, "routing present"}, 
+    { GRE_KP, "key present"}, 
+    { GRE_SP, "sequence# present"}, 
+    { GRE_sP, "source routing present"},
+    { GRE_RECRS, "recursion count"},
+    { GRE_AP, "ack present"},
+    { 0, NULL }
+};
+
+#define	GRE_VERS_MASK	0x0007		/* protocol version */
+
+/* source route entry types */
+#define	GRESRE_IP	0x0800		/* IP */
+#define	GRESRE_ASN	0xfffe		/* ASN */
+
+void gre_print_0(const u_char *, u_int);
+void gre_print_1(const u_char *, u_int);
+void gre_sre_print(u_int16_t, u_int8_t, u_int8_t, const u_char *, u_int);
+void gre_sre_ip_print(u_int8_t, u_int8_t, const u_char *, u_int);
+void gre_sre_asn_print(u_int8_t, u_int8_t, const u_char *, u_int);
+
+void
+gre_print(const u_char *bp, u_int length)
+{
+	u_int len = length, vers;
+
+	if (len < 2) {
+		printf("[|gre]");
+		return;
+	}
+	vers = EXTRACT_16BITS(bp) & GRE_VERS_MASK;
+        printf("GREv%u",vers);
+
+        switch(vers) {
+        case 0:
+            gre_print_0(bp, len);
+            break;
+        case 1:
+            gre_print_1(bp, len);
+            break;
+	default:
+            printf(" ERROR: unknown-version");
+            break;
+        }
+	return;
+
+}
+
+void
+gre_print_0(const u_char *bp, u_int length)
+{
+	u_int len = length;
+	u_int16_t flags, prot;
+
+	flags = EXTRACT_16BITS(bp);
+        if (vflag)
+            printf(", Flags [%s]",
+                   bittok2str(gre_flag_values,"none",flags));
+
+	len -= 2;
+	bp += 2;
+
+	if (len < 2)
+		goto trunc;
+	prot = EXTRACT_16BITS(bp);
+	len -= 2;
+	bp += 2;
+
+	if ((flags & GRE_CP) | (flags & GRE_RP)) {
+		if (len < 2)
+			goto trunc;
+		if (vflag)
+			printf(", sum 0x%x", EXTRACT_16BITS(bp));
+		bp += 2;
+		len -= 2;
+
+		if (len < 2)
+			goto trunc;
+		printf(", off 0x%x", EXTRACT_16BITS(bp));
+		bp += 2;
+		len -= 2;
+	}
+
+	if (flags & GRE_KP) {
+		if (len < 4)
+			goto trunc;
+		printf(", key=0x%x", EXTRACT_32BITS(bp));
+		bp += 4;
+		len -= 4;
+	}
+
+	if (flags & GRE_SP) {
+		if (len < 4)
+			goto trunc;
+		printf(", seq %u", EXTRACT_32BITS(bp));
+		bp += 4;
+		len -= 4;
+	}
+
+	if (flags & GRE_RP) {
+		for (;;) {
+			u_int16_t af;
+			u_int8_t sreoff;
+			u_int8_t srelen;
+
+			if (len < 4)
+				goto trunc;
+			af = EXTRACT_16BITS(bp);
+			sreoff = *(bp + 2);
+			srelen = *(bp + 3);
+			bp += 4;
+			len -= 4;
+
+			if (af == 0 && srelen == 0)
+				break;
+
+			gre_sre_print(af, sreoff, srelen, bp, len);
+
+			if (len < srelen)
+				goto trunc;
+			bp += srelen;
+			len -= srelen;
+		}
+	}
+
+        if (eflag)
+            printf(", proto %s (0x%04x)",
+                   tok2str(ethertype_values,"unknown",prot),
+                   prot);
+
+        printf(", length %u",length);
+
+        if (vflag < 1)
+            printf(": "); /* put in a colon as protocol demarc */
+        else
+            printf("\n\t"); /* if verbose go multiline */
+
+	switch (prot) {
+	case ETHERTYPE_IP:
+	        ip_print(gndo, bp, len);
+		break;
+#ifdef INET6
+	case ETHERTYPE_IPV6:
+		ip6_print(gndo, bp, len);
+		break;
+#endif
+	case ETHERTYPE_MPLS:
+		mpls_print(bp, len);
+		break;
+	case ETHERTYPE_IPX:
+		ipx_print(bp, len);
+		break;
+	case ETHERTYPE_ATALK:
+		atalk_print(bp, len);
+		break;
+	case ETHERTYPE_GRE_ISO:
+		isoclns_print(bp, len, len);
+		break;
+	case ETHERTYPE_TEB:
+		ether_print(gndo, bp, len, len, NULL, NULL);
+		break;
+	default:
+		printf("gre-proto-0x%x", prot);
+	}
+	return;
+
+trunc:
+	printf("[|gre]");
+}
+
+void
+gre_print_1(const u_char *bp, u_int length)
+{
+	u_int len = length;
+	u_int16_t flags, prot;
+
+	flags = EXTRACT_16BITS(bp);
+	len -= 2;
+	bp += 2;
+
+	if (vflag)
+            printf(", Flags [%s]",
+                   bittok2str(gre_flag_values,"none",flags));
+
+	if (len < 2)
+		goto trunc;
+	prot = EXTRACT_16BITS(bp);
+	len -= 2;
+	bp += 2;
+
+
+	if (flags & GRE_KP) {
+		u_int32_t k;
+
+		if (len < 4)
+			goto trunc;
+		k = EXTRACT_32BITS(bp);
+		printf(", call %d", k & 0xffff);
+		len -= 4;
+		bp += 4;
+	}
+
+	if (flags & GRE_SP) {
+		if (len < 4)
+			goto trunc;
+		printf(", seq %u", EXTRACT_32BITS(bp));
+		bp += 4;
+		len -= 4;
+	}
+
+	if (flags & GRE_AP) {
+		if (len < 4)
+			goto trunc;
+		printf(", ack %u", EXTRACT_32BITS(bp));
+		bp += 4;
+		len -= 4;
+	}
+
+	if ((flags & GRE_SP) == 0)
+		printf(", no-payload");
+
+        if (eflag)
+            printf(", proto %s (0x%04x)",
+                   tok2str(ethertype_values,"unknown",prot),
+                   prot);
+
+        printf(", length %u",length);
+
+        if ((flags & GRE_SP) == 0)
+            return;
+
+        if (vflag < 1)
+            printf(": "); /* put in a colon as protocol demarc */
+        else
+            printf("\n\t"); /* if verbose go multiline */
+
+	switch (prot) {
+	case ETHERTYPE_PPP:
+                ppp_print(bp, len);
+		break;
+	default:
+		printf("gre-proto-0x%x", prot);
+		break;
+	}
+	return;
+
+trunc:
+	printf("[|gre]");
+}
+
+void
+gre_sre_print(u_int16_t af, u_int8_t sreoff, u_int8_t srelen,
+    const u_char *bp, u_int len)
+{
+	switch (af) {
+	case GRESRE_IP:
+		printf(", (rtaf=ip");
+		gre_sre_ip_print(sreoff, srelen, bp, len);
+		printf(") ");
+		break;
+	case GRESRE_ASN:
+		printf(", (rtaf=asn");
+		gre_sre_asn_print(sreoff, srelen, bp, len);
+		printf(") ");
+		break;
+	default:
+		printf(", (rtaf=0x%x) ", af);
+	}
+}
+void
+gre_sre_ip_print(u_int8_t sreoff, u_int8_t srelen, const u_char *bp, u_int len)
+{
+	struct in_addr a;
+	const u_char *up = bp;
+
+	if (sreoff & 3) {
+		printf(", badoffset=%u", sreoff);
+		return;
+	}
+	if (srelen & 3) {
+		printf(", badlength=%u", srelen);
+		return;
+	}
+	if (sreoff >= srelen) {
+		printf(", badoff/len=%u/%u", sreoff, srelen);
+		return;
+	}
+
+	for (;;) {
+		if (len < 4 || srelen == 0)
+			return;
+
+		memcpy(&a, bp, sizeof(a));
+		printf(" %s%s",
+		    ((bp - up) == sreoff) ? "*" : "",
+		    inet_ntoa(a));
+
+		bp += 4;
+		len -= 4;
+		srelen -= 4;
+	}
+}
+
+void
+gre_sre_asn_print(u_int8_t sreoff, u_int8_t srelen, const u_char *bp, u_int len)
+{
+	const u_char *up = bp;
+
+	if (sreoff & 1) {
+		printf(", badoffset=%u", sreoff);
+		return;
+	}
+	if (srelen & 1) {
+		printf(", badlength=%u", srelen);
+		return;
+	}
+	if (sreoff >= srelen) {
+		printf(", badoff/len=%u/%u", sreoff, srelen);
+		return;
+	}
+
+	for (;;) {
+		if (len < 2 || srelen == 0)
+			return;
+
+		printf(" %s%x",
+		    ((bp - up) == sreoff) ? "*" : "",
+		    EXTRACT_16BITS(bp));
+
+		bp += 2;
+		len -= 2;
+		srelen -= 2;
+	}
+}