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, 164 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-null.c b/freebsd/contrib/tcpdump/print-null.c
new file mode 100644
index 00000000..ac727077
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-null.c
@@ -0,0 +1,164 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-null.c,v 1.57 2006-03-23 14:58:44 hannes Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <pcap.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+
+#include "ip.h"
+#ifdef INET6
+#include "ip6.h"
+#endif
+#include "af.h"
+
+/*
+ * The DLT_NULL packet header is 4 bytes long. It contains a host-byte-order
+ * 32-bit integer that specifies the family, e.g. AF_INET.
+ *
+ * Note here that "host" refers to the host on which the packets were
+ * captured; that isn't necessarily *this* host.
+ *
+ * The OpenBSD DLT_LOOP packet header is the same, except that the integer
+ * is in network byte order.
+ */
+#define	NULL_HDRLEN 4
+
+/*
+ * Byte-swap a 32-bit number.
+ * ("htonl()" or "ntohl()" won't work - we want to byte-swap even on
+ * big-endian platforms.)
+ */
+#define	SWAPLONG(y) \
+((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
+
+static inline void
+null_hdr_print(u_int family, u_int length)
+{
+	if (!qflag) {
+		(void)printf("AF %s (%u)",
+			tok2str(bsd_af_values,"Unknown",family),family);
+	} else {
+		(void)printf("%s",
+			tok2str(bsd_af_values,"Unknown AF %u",family));
+	}
+
+	(void)printf(", length %u: ", length);
+}
+
+/*
+ * This is the top level routine of the printer.  'p' points
+ * to the ether header of the packet, 'h->ts' is the timestamp,
+ * 'h->len' is the length of the packet off the wire, and 'h->caplen'
+ * is the number of bytes actually captured.
+ */
+u_int
+null_if_print(const struct pcap_pkthdr *h, const u_char *p)
+{
+	u_int length = h->len;
+	u_int caplen = h->caplen;
+	u_int family;
+
+	if (caplen < NULL_HDRLEN) {
+		printf("[|null]");
+		return (NULL_HDRLEN);
+	}
+
+	memcpy((char *)&family, (char *)p, sizeof(family));
+
+	/*
+	 * This isn't necessarily in our host byte order; if this is
+	 * a DLT_LOOP capture, it's in network byte order, and if
+	 * this is a DLT_NULL capture from a machine with the opposite
+	 * byte-order, it's in the opposite byte order from ours.
+	 *
+	 * If the upper 16 bits aren't all zero, assume it's byte-swapped.
+	 */
+	if ((family & 0xFFFF0000) != 0)
+		family = SWAPLONG(family);
+
+	if (eflag)
+		null_hdr_print(family, length);
+
+	length -= NULL_HDRLEN;
+	caplen -= NULL_HDRLEN;
+	p += NULL_HDRLEN;
+
+	switch (family) {
+
+	case BSD_AFNUM_INET:
+		ip_print(gndo, p, length);
+		break;
+
+#ifdef INET6
+	case BSD_AFNUM_INET6_BSD:
+	case BSD_AFNUM_INET6_FREEBSD:
+	case BSD_AFNUM_INET6_DARWIN:
+		ip6_print(gndo, p, length);
+		break;
+#endif
+
+	case BSD_AFNUM_ISO:
+		isoclns_print(p, length, caplen);
+		break;
+
+	case BSD_AFNUM_APPLETALK:
+		atalk_print(p, length);
+		break;
+
+	case BSD_AFNUM_IPX:
+		ipx_print(p, length);
+		break;
+
+	default:
+		/* unknown AF_ value */
+		if (!eflag)
+			null_hdr_print(family, length + NULL_HDRLEN);
+		if (!suppress_default_print)
+			default_print(p, caplen);
+	}
+
+	return (NULL_HDRLEN);
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */