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, 312 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-ntp.c b/freebsd/contrib/tcpdump/print-ntp.c
new file mode 100644
index 00000000..9c37de1d
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-ntp.c
@@ -0,0 +1,312 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Copyright (c) 1990, 1991, 1992, 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.
+ *
+ * Format and print ntp packets.
+ *	By Jeffrey Mogul/DECWRL
+ *	loosely based on print-bootp.c
+ *
+ * $FreeBSD$
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-ntp.c,v 1.43 2007-11-30 13:45:10 hannes Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+#ifdef HAVE_STRFTIME
+#include <time.h>
+#endif
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"
+#ifdef MODEMASK
+#undef MODEMASK					/* Solaris sucks */
+#endif
+#include "ntp.h"
+
+static void p_sfix(const struct s_fixedpt *);
+static void p_ntp_time(const struct l_fixedpt *);
+static void p_ntp_delta(const struct l_fixedpt *, const struct l_fixedpt *);
+
+static struct tok ntp_mode_values[] = {
+    { MODE_UNSPEC,    "unspecified" },
+    { MODE_SYM_ACT,   "symmetric active" },
+    { MODE_SYM_PAS,   "symmetric passive" },
+    { MODE_CLIENT,    "Client" },
+    { MODE_SERVER,    "Server" },
+    { MODE_BROADCAST, "Broadcast" },
+    { MODE_RES1,      "Reserved" },
+    { MODE_RES2,      "Reserved" },
+    { 0, NULL }
+};
+
+static struct tok ntp_leapind_values[] = {
+    { NO_WARNING,     "" },
+    { PLUS_SEC,       "+1s" },
+    { MINUS_SEC,      "-1s" },
+    { ALARM,          "clock unsynchronized" },
+    { 0, NULL }
+};
+
+static struct tok ntp_stratum_values[] = {
+	{ UNSPECIFIED,	"unspecified" },
+	{ PRIM_REF, 	"primary reference" },
+	{ 0, NULL }
+};
+
+/*
+ * Print ntp requests
+ */
+void
+ntp_print(register const u_char *cp, u_int length)
+{
+	register const struct ntpdata *bp;
+	int mode, version, leapind;
+
+	bp = (struct ntpdata *)cp;
+
+	TCHECK(bp->status);
+
+	version = (int)(bp->status & VERSIONMASK) >> 3;
+	printf("NTPv%d", version);
+
+	mode = bp->status & MODEMASK;
+        if (!vflag) {
+            printf (", %s, length %u",
+                    tok2str(ntp_mode_values, "Unknown mode", mode),
+                    length);
+            return;
+        }
+        
+        printf (", length %u\n\t%s",
+                length,
+                tok2str(ntp_mode_values, "Unknown mode", mode));        
+
+	leapind = bp->status & LEAPMASK;
+        printf (", Leap indicator: %s (%u)",
+                tok2str(ntp_leapind_values, "Unknown", leapind),
+                leapind);
+
+	TCHECK(bp->stratum);
+	printf(", Stratum %u (%s)", 	
+		bp->stratum,
+		tok2str(ntp_stratum_values, (bp->stratum >=2 && bp->stratum<=15) ? "secondary reference" : "reserved", bp->stratum));
+
+	TCHECK(bp->ppoll);
+	printf(", poll %u (%us)", bp->ppoll, 1 << bp->ppoll);
+
+	/* Can't TCHECK bp->precision bitfield so bp->distance + 0 instead */
+	TCHECK2(bp->root_delay, 0);
+	printf(", precision %d", bp->precision);
+
+	TCHECK(bp->root_delay);
+	fputs("\n\tRoot Delay: ", stdout);
+	p_sfix(&bp->root_delay);
+
+	TCHECK(bp->root_dispersion);
+	fputs(", Root dispersion: ", stdout);
+	p_sfix(&bp->root_dispersion);
+
+	TCHECK(bp->refid);
+	fputs(", Reference-ID: ", stdout);
+	/* Interpretation depends on stratum */
+	switch (bp->stratum) {
+
+	case UNSPECIFIED:
+		printf("(unspec)");
+		break;
+
+	case PRIM_REF:
+		if (fn_printn((u_char *)&(bp->refid), 4, snapend))
+			goto trunc;
+		break;
+
+	case INFO_QUERY:
+		printf("%s INFO_QUERY", ipaddr_string(&(bp->refid)));
+		/* this doesn't have more content */
+		return;
+
+	case INFO_REPLY:
+		printf("%s INFO_REPLY", ipaddr_string(&(bp->refid)));
+		/* this is too complex to be worth printing */
+		return;
+
+	default:
+		printf("%s", ipaddr_string(&(bp->refid)));
+		break;
+	}
+
+	TCHECK(bp->ref_timestamp);
+	fputs("\n\t  Reference Timestamp:  ", stdout);
+	p_ntp_time(&(bp->ref_timestamp));
+
+	TCHECK(bp->org_timestamp);
+	fputs("\n\t  Originator Timestamp: ", stdout);
+	p_ntp_time(&(bp->org_timestamp));
+
+	TCHECK(bp->rec_timestamp);
+	fputs("\n\t  Receive Timestamp:    ", stdout);
+	p_ntp_time(&(bp->rec_timestamp));
+
+	TCHECK(bp->xmt_timestamp);
+	fputs("\n\t  Transmit Timestamp:   ", stdout);
+	p_ntp_time(&(bp->xmt_timestamp));
+
+	fputs("\n\t    Originator - Receive Timestamp:  ", stdout);
+	p_ntp_delta(&(bp->org_timestamp), &(bp->rec_timestamp));
+
+	fputs("\n\t    Originator - Transmit Timestamp: ", stdout);
+	p_ntp_delta(&(bp->org_timestamp), &(bp->xmt_timestamp));
+
+	if ( (sizeof(struct ntpdata) - length) == 16) { 	/* Optional: key-id */
+		TCHECK(bp->key_id);
+		printf("\n\tKey id: %u", bp->key_id);
+	} else if ( (sizeof(struct ntpdata) - length) == 0) { 	/* Optional: key-id + authentication */
+		TCHECK(bp->key_id);
+		printf("\n\tKey id: %u", bp->key_id);
+		TCHECK2(bp->message_digest, sizeof (bp->message_digest));
+                printf("\n\tAuthentication: %08x%08x%08x%08x",
+        		       EXTRACT_32BITS(bp->message_digest),
+		               EXTRACT_32BITS(bp->message_digest + 4),
+		               EXTRACT_32BITS(bp->message_digest + 8),
+		               EXTRACT_32BITS(bp->message_digest + 12));
+        }
+	return;
+
+trunc:
+	fputs(" [|ntp]", stdout);
+}
+
+static void
+p_sfix(register const struct s_fixedpt *sfp)
+{
+	register int i;
+	register int f;
+	register float ff;
+
+	i = EXTRACT_16BITS(&sfp->int_part);
+	f = EXTRACT_16BITS(&sfp->fraction);
+	ff = f / 65536.0;	/* shift radix point by 16 bits */
+	f = ff * 1000000.0;	/* Treat fraction as parts per million */
+	printf("%d.%06d", i, f);
+}
+
+#define	FMAXINT	(4294967296.0)	/* floating point rep. of MAXINT */
+
+static void
+p_ntp_time(register const struct l_fixedpt *lfp)
+{
+	register int32_t i;
+	register u_int32_t uf;
+	register u_int32_t f;
+	register float ff;
+
+	i = EXTRACT_32BITS(&lfp->int_part);
+	uf = EXTRACT_32BITS(&lfp->fraction);
+	ff = uf;
+	if (ff < 0.0)		/* some compilers are buggy */
+		ff += FMAXINT;
+	ff = ff / FMAXINT;	/* shift radix point by 32 bits */
+	f = ff * 1000000000.0;	/* treat fraction as parts per billion */
+	printf("%u.%09d", i, f);
+
+#ifdef HAVE_STRFTIME
+	/*
+	 * print the time in human-readable format.
+	 */
+	if (i) {
+	    time_t seconds = i - JAN_1970;
+	    struct tm *tm;
+	    char time_buf[128];
+
+	    tm = localtime(&seconds);
+	    strftime(time_buf, sizeof (time_buf), "%Y/%m/%d %H:%M:%S", tm);
+	    printf (" (%s)", time_buf);
+	}
+#endif
+}
+
+/* Prints time difference between *lfp and *olfp */
+static void
+p_ntp_delta(register const struct l_fixedpt *olfp,
+	    register const struct l_fixedpt *lfp)
+{
+	register int32_t i;
+	register u_int32_t u, uf;
+	register u_int32_t ou, ouf;
+	register u_int32_t f;
+	register float ff;
+	int signbit;
+
+	u = EXTRACT_32BITS(&lfp->int_part);
+	ou = EXTRACT_32BITS(&olfp->int_part);
+	uf = EXTRACT_32BITS(&lfp->fraction);
+	ouf = EXTRACT_32BITS(&olfp->fraction);
+	if (ou == 0 && ouf == 0) {
+		p_ntp_time(lfp);
+		return;
+	}
+
+	i = u - ou;
+
+	if (i > 0) {		/* new is definitely greater than old */
+		signbit = 0;
+		f = uf - ouf;
+		if (ouf > uf)	/* must borrow from high-order bits */
+			i -= 1;
+	} else if (i < 0) {	/* new is definitely less than old */
+		signbit = 1;
+		f = ouf - uf;
+		if (uf > ouf)	/* must carry into the high-order bits */
+			i += 1;
+		i = -i;
+	} else {		/* int_part is zero */
+		if (uf > ouf) {
+			signbit = 0;
+			f = uf - ouf;
+		} else {
+			signbit = 1;
+			f = ouf - uf;
+		}
+	}
+
+	ff = f;
+	if (ff < 0.0)		/* some compilers are buggy */
+		ff += FMAXINT;
+	ff = ff / FMAXINT;	/* shift radix point by 32 bits */
+	f = ff * 1000000000.0;	/* treat fraction as parts per billion */
+	if (signbit)
+		putchar('-');
+	else
+		putchar('+');
+	printf("%d.%09d", i, f);
+}
+