Add support for RFC 2625 IP-over-Fibre Channel.

1 files changed, 168 insertions, 0 deletions

diff --git a/print-ipfc.c b/print-ipfc.c
new file mode 100644
index 00000000..bcad6c39
--- /dev/null
+++ b/print-ipfc.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 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.
+ */
+
+#ifndef lint
+static const char rcsid[] =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-ipfc.c,v 1.1 2002-10-18 09:17:48 guy 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 "ethertype.h"
+
+#include "ether.h"
+#include "ipfc.h"
+
+/*
+ * RFC 2625 IP-over-Fibre Channel.
+ */
+
+/* Extract src, dst addresses */
+static inline void
+extract_ipfc_addrs(const struct ipfc_header *ipfcp, char *ipfcsrc,
+    char *ipfcdst)
+{
+	/*
+	 * We assume that, as per RFC 2625, the lower 48 bits of the
+	 * source and destination addresses are MAC addresses.
+	 */
+	memcpy(ipfcdst, (const char *)&ipfcp->ipfc_dhost[2], 6);
+	memcpy(ipfcsrc, (const char *)&ipfcp->ipfc_shost[2], 6);
+}
+
+/*
+ * Print the Network_Header
+ */
+static inline void
+ipfc_hdr_print(register const struct ipfc_header *ipfcp _U_,
+	   register u_int length, register const u_char *ipfcsrc,
+	   register const u_char *ipfcdst)
+{
+	const char *srcname, *dstname;
+
+	srcname = etheraddr_string(ipfcsrc);
+	dstname = etheraddr_string(ipfcdst);
+
+	/*
+	 * XXX - show the upper 16 bits?  Do so only if "vflag" is set?
+	 */
+	(void) printf("%s %s %d: ", srcname, dstname, length);
+}
+
+static void
+ipfc_print(const u_char *p, u_int length, u_int caplen)
+{
+	const struct ipfc_header *ipfcp = (const struct ipfc_header *)p;
+	struct ether_header ehdr;
+	u_short extracted_ethertype;
+
+	if (caplen < IPFC_HDRLEN) {
+		printf("[|ipfc]");
+		return;
+	}
+	/*
+	 * Get the network addresses into a canonical form
+	 */
+	extract_ipfc_addrs(ipfcp, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));
+	/*
+	 * Some printers want to get back at the link level addresses,
+	 * and/or check that they're not walking off the end of the packet.
+	 * Rather than pass them all the way down, we set these globals.
+	 */
+	snapend = p + caplen;
+	/*
+	 * Actually, the only printers that use packetp are print-arp.c
+	 * and print-bootp.c, and they assume that packetp points to an
+	 * Ethernet header.  The right thing to do is to fix them to know
+	 * which link type is in use when they excavate. XXX
+	 */
+	packetp = (u_char *)&ehdr;
+
+	if (eflag)
+		ipfc_hdr_print(ipfcp, length, ESRC(&ehdr), EDST(&ehdr));
+
+	/* Skip over Network_Header */
+	length -= IPFC_HDRLEN;
+	p += IPFC_HDRLEN;
+	caplen -= IPFC_HDRLEN;
+
+	/* Frame Control field determines interpretation of packet */
+	extracted_ethertype = 0;
+	/* Try to print the LLC-layer header & higher layers */
+	if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
+	    &extracted_ethertype) == 0) {
+		/*
+		 * Some kinds of LLC packet we cannot
+		 * handle intelligently
+		 */
+		if (!eflag)
+			ipfc_hdr_print(ipfcp, length + IPFC_HDRLEN,
+			    ESRC(&ehdr), EDST(&ehdr));
+		if (extracted_ethertype) {
+			printf("(LLC %s) ",
+		etherproto_string(htons(extracted_ethertype)));
+		}
+		if (!xflag && !qflag)
+			default_print(p, caplen);
+	}
+}
+
+/*
+ * This is the top level routine of the printer.  'sp' is the points
+ * to the Network_Header of the packet, 'tvp' is the timestamp,
+ * 'length' is the length of the packet off the wire, and 'caplen'
+ * is the number of bytes actually captured.
+ */
+void
+ipfc_if_print(u_char *pcap _U_, const struct pcap_pkthdr *h,
+	      register const u_char *p)
+{
+	u_int caplen = h->caplen;
+	u_int length = h->len;
+
+	++infodelay;
+	ts_print(&h->ts);
+
+	ipfc_print(p, length, caplen);
+
+	/*
+	 * If "-x" was specified, print stuff past the Network_Header,
+	 * if there's anything to print.
+	 */
+	if (xflag && caplen > IPFC_HDRLEN)
+		default_print(p + IPFC_HDRLEN, caplen - IPFC_HDRLEN);
+
+	putchar('\n');
+
+	--infodelay;
+	if (infoprint)
+		info(0);
+}