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, 190 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-pflog.c b/freebsd/contrib/tcpdump/print-pflog.c
new file mode 100644
index 00000000..5f67fb0e
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-pflog.c
@@ -0,0 +1,190 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
+ *	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.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.16 2007-09-12 19:36:18 guy Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef HAVE_NET_PFVAR_H
+#error "No pf headers available"
+#endif
+#include <rtems/bsd/sys/types.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/pfvar.h>
+#include <net/if_pflog.h>
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <pcap.h>
+
+#include "extract.h"
+#include "interface.h"
+#include "addrtoname.h"
+
+static struct tok pf_reasons[] = {
+	{ 0,	"0(match)" },
+	{ 1,	"1(bad-offset)" },
+	{ 2,	"2(fragment)" },
+	{ 3,	"3(short)" },
+	{ 4,	"4(normalize)" },
+	{ 5,	"5(memory)" },
+	{ 6,	"6(bad-timestamp)" },
+	{ 7,	"7(congestion)" },
+	{ 8,	"8(ip-option)" },
+	{ 9,	"9(proto-cksum)" },
+	{ 10,	"10(state-mismatch)" },
+	{ 11,	"11(state-insert)" },
+	{ 12,	"12(state-limit)" },
+	{ 13,	"13(src-limit)" },
+	{ 14,	"14(synproxy)" },
+	{ 0,	NULL }
+};
+
+static struct tok pf_actions[] = {
+	{ PF_PASS,		"pass" },
+	{ PF_DROP,		"block" },
+	{ PF_SCRUB,		"scrub" },
+	{ PF_NAT,		"nat" },
+	{ PF_NONAT,		"nat" },
+	{ PF_BINAT,		"binat" },
+	{ PF_NOBINAT,		"binat" },
+	{ PF_RDR,		"rdr" },
+	{ PF_NORDR,		"rdr" },
+	{ PF_SYNPROXY_DROP,	"synproxy-drop" },
+	{ 0,			NULL }
+};
+
+static struct tok pf_directions[] = {
+	{ PF_INOUT,	"in/out" },
+	{ PF_IN,	"in" },
+	{ PF_OUT,	"out" },
+	{ 0,		NULL }
+};
+
+/* For reading capture files on other systems */
+#define	OPENBSD_AF_INET		2
+#define	OPENBSD_AF_INET6	24
+
+static void
+pflog_print(const struct pfloghdr *hdr)
+{
+	u_int32_t rulenr, subrulenr;
+
+	rulenr = EXTRACT_32BITS(&hdr->rulenr);
+	subrulenr = EXTRACT_32BITS(&hdr->subrulenr);
+	if (subrulenr == (u_int32_t)-1)
+		printf("rule %u/", rulenr);
+	else
+		printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr);
+
+	printf("%s: %s %s on %s: ",
+	    tok2str(pf_reasons, "unkn(%u)", hdr->reason),
+	    tok2str(pf_actions, "unkn(%u)", hdr->action),
+	    tok2str(pf_directions, "unkn(%u)", hdr->dir),
+	    hdr->ifname);
+}
+
+u_int
+pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+{
+	u_int length = h->len;
+	u_int hdrlen;
+	u_int caplen = h->caplen;
+	const struct pfloghdr *hdr;
+	u_int8_t af;
+
+	/* check length */
+	if (caplen < sizeof(u_int8_t)) {
+		printf("[|pflog]");
+		return (caplen);
+	}
+
+#define MIN_PFLOG_HDRLEN	45
+	hdr = (struct pfloghdr *)p;
+	if (hdr->length < MIN_PFLOG_HDRLEN) {
+		printf("[pflog: invalid header length!]");
+		return (hdr->length);	/* XXX: not really */
+	}
+	hdrlen = BPF_WORDALIGN(hdr->length);
+
+	if (caplen < hdrlen) {
+		printf("[|pflog]");
+		return (hdrlen);	/* XXX: true? */
+	}
+
+	/* print what we know */
+	hdr = (struct pfloghdr *)p;
+	TCHECK(*hdr);
+	if (eflag)
+		pflog_print(hdr);
+	
+	/* skip to the real packet */
+	af = hdr->af;
+	length -= hdrlen;
+	caplen -= hdrlen;
+	p += hdrlen;
+	switch (af) {
+
+		case AF_INET:
+#if OPENBSD_AF_INET != AF_INET
+		case OPENBSD_AF_INET:		/* XXX: read pcap files */
+#endif
+		        ip_print(gndo, p, length);
+			break;
+
+#ifdef INET6
+		case AF_INET6:
+#if OPENBSD_AF_INET6 != AF_INET6
+		case OPENBSD_AF_INET6:		/* XXX: read pcap files */
+#endif
+			ip6_print(gndo, p, length);
+			break;
+#endif
+
+	default:
+		/* address family not handled, print raw packet */
+		if (!eflag)
+			pflog_print(hdr);
+		if (!suppress_default_print)
+			default_print(p, caplen);
+	}
+	
+	return (hdrlen);
+trunc:
+	printf("[|pflog]");
+	return (hdrlen);
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */