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, 213 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-pppoe.c b/freebsd/contrib/tcpdump/print-pppoe.c
new file mode 100644
index 00000000..af12682f
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-pppoe.c
@@ -0,0 +1,213 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Copyright (c) 1988, 1989, 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.
+ * 
+ * Original code by Greg Stark <gsstark@mit.edu> 
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+"@(#) $Header: /tcpdump/master/tcpdump/print-pppoe.c,v 1.31 2005-04-26 19:48:38 guy 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 "ppp.h"
+#include "ethertype.h"
+#include "ether.h"
+#include "extract.h"			/* must come after interface.h */
+
+/* Codes */
+enum {
+	PPPOE_PADI = 0x09,
+	PPPOE_PADO = 0x07,
+	PPPOE_PADR = 0x19,
+	PPPOE_PADS = 0x65,
+	PPPOE_PADT = 0xa7
+};
+
+static struct tok pppoecode2str[] = {
+	{ PPPOE_PADI, "PADI" },
+	{ PPPOE_PADO, "PADO" },
+	{ PPPOE_PADR, "PADR" },
+	{ PPPOE_PADS, "PADS" },
+	{ PPPOE_PADT, "PADT" },
+	{ 0, "" }, /* PPP Data */
+	{ 0, NULL }
+};
+
+/* Tags */
+enum {
+	PPPOE_EOL = 0,
+	PPPOE_SERVICE_NAME = 0x0101,
+	PPPOE_AC_NAME = 0x0102,
+	PPPOE_HOST_UNIQ = 0x0103,
+	PPPOE_AC_COOKIE = 0x0104,
+	PPPOE_VENDOR = 0x0105,
+	PPPOE_RELAY_SID = 0x0110,
+	PPPOE_MAX_PAYLOAD = 0x0120,
+	PPPOE_SERVICE_NAME_ERROR = 0x0201,
+	PPPOE_AC_SYSTEM_ERROR = 0x0202,
+	PPPOE_GENERIC_ERROR = 0x0203
+};
+
+static struct tok pppoetag2str[] = {
+	{ PPPOE_EOL, "EOL" },
+	{ PPPOE_SERVICE_NAME, "Service-Name" },
+	{ PPPOE_AC_NAME, "AC-Name" },
+	{ PPPOE_HOST_UNIQ, "Host-Uniq" },
+	{ PPPOE_AC_COOKIE, "AC-Cookie" },
+	{ PPPOE_VENDOR, "Vendor-Specific" },
+	{ PPPOE_RELAY_SID, "Relay-Session-ID" },
+	{ PPPOE_MAX_PAYLOAD, "PPP-Max-Payload" },
+	{ PPPOE_SERVICE_NAME_ERROR, "Service-Name-Error" },
+	{ PPPOE_AC_SYSTEM_ERROR, "AC-System-Error" },
+	{ PPPOE_GENERIC_ERROR, "Generic-Error" },
+	{ 0, NULL }
+};
+
+#define PPPOE_HDRLEN 6
+#define MAXTAGPRINT 80
+
+u_int
+pppoe_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+{
+	return (pppoe_print(p, h->len));
+}
+
+u_int
+pppoe_print(register const u_char *bp, u_int length)
+{
+	u_int16_t pppoe_ver, pppoe_type, pppoe_code, pppoe_sessionid;
+	u_int pppoe_length;
+	const u_char *pppoe_packet, *pppoe_payload;
+
+	if (length < PPPOE_HDRLEN) {
+		(void)printf("truncated-pppoe %u", length);
+		return (length);
+	}
+	length -= PPPOE_HDRLEN;
+	pppoe_packet = bp;
+	TCHECK2(*pppoe_packet, PPPOE_HDRLEN);
+	pppoe_ver  = (pppoe_packet[0] & 0xF0) >> 4;
+	pppoe_type  = (pppoe_packet[0] & 0x0F);
+	pppoe_code = pppoe_packet[1];
+	pppoe_sessionid = EXTRACT_16BITS(pppoe_packet + 2);
+	pppoe_length    = EXTRACT_16BITS(pppoe_packet + 4);
+	pppoe_payload = pppoe_packet + PPPOE_HDRLEN;
+
+	if (pppoe_ver != 1) {
+		printf(" [ver %d]",pppoe_ver);
+	}
+	if (pppoe_type != 1) {
+		printf(" [type %d]",pppoe_type);
+	}
+
+	printf("PPPoE %s", tok2str(pppoecode2str, "PAD-%x", pppoe_code));
+	if (pppoe_code == PPPOE_PADI && pppoe_length > 1484 - PPPOE_HDRLEN) {
+		printf(" [len %u!]",pppoe_length);
+	}
+	if (pppoe_length > length) {
+		printf(" [len %u > %u!]", pppoe_length, length);
+		pppoe_length = length;
+	}
+	if (pppoe_sessionid) {
+		printf(" [ses 0x%x]", pppoe_sessionid);
+	}
+
+	if (pppoe_code) {
+		/* PPP session packets don't contain tags */
+		u_short tag_type = 0xffff, tag_len;
+		const u_char *p = pppoe_payload;
+
+		/*
+		 * loop invariant:
+		 * p points to current tag,
+		 * tag_type is previous tag or 0xffff for first iteration
+		 */
+		while (tag_type && p < pppoe_payload + pppoe_length) {
+			TCHECK2(*p, 4);
+			tag_type = EXTRACT_16BITS(p);
+			tag_len = EXTRACT_16BITS(p + 2);
+			p += 4;
+			/* p points to tag_value */
+
+			if (tag_len) {
+				unsigned isascii = 0, isgarbage = 0;
+				const u_char *v;
+				char tag_str[MAXTAGPRINT];
+				unsigned tag_str_len = 0;
+
+				/* TODO print UTF-8 decoded text */
+				TCHECK2(*p, tag_len);
+				for (v = p; v < p + tag_len && tag_str_len < MAXTAGPRINT-1; v++)
+					if (*v >= 32 && *v < 127) {
+						tag_str[tag_str_len++] = *v;
+						isascii++;
+					} else {
+						tag_str[tag_str_len++] = '.';
+						isgarbage++;
+					}
+				tag_str[tag_str_len] = 0;
+
+				if (isascii > isgarbage) {
+					printf(" [%s \"%*.*s\"]",
+					       tok2str(pppoetag2str, "TAG-0x%x", tag_type),
+					       (int)tag_str_len,
+					       (int)tag_str_len,
+					       tag_str);
+				} else {
+					/* Print hex, not fast to abuse printf but this doesn't get used much */
+					printf(" [%s 0x", tok2str(pppoetag2str, "TAG-0x%x", tag_type));
+					for (v=p; v<p+tag_len; v++) {
+						printf("%02X", *v);
+					}
+					printf("]");
+				}
+				
+
+			} else
+				printf(" [%s]", tok2str(pppoetag2str,
+				    "TAG-0x%x", tag_type));
+
+			p += tag_len;
+			/* p points to next tag */
+		}
+		return (0);
+	} else {
+		/* PPPoE data */
+		printf(" ");
+		return (PPPOE_HDRLEN + ppp_print(pppoe_payload, pppoe_length));
+	}
+
+trunc:
+	printf("[|pppoe]");
+	return (PPPOE_HDRLEN);
+}