1/*
2 * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22#include <sys/cdefs.h>
23#ifndef lint
24#if 0
25static const char rcsid[] _U_ =
26    "@(#) Header: /tcpdump/master/tcpdump/print-ipfc.c,v 1.9 2005-11-13 12:12:42 guy Exp (LBL)";
27#else
28__RCSID("$NetBSD: print-ipfc.c,v 1.2 2010/12/05 05:11:30 christos Exp $");
29#endif
30#endif
31
32#ifdef HAVE_CONFIG_H
33#include "config.h"
34#endif
35
36#include <tcpdump-stdinc.h>
37
38#include <pcap.h>
39#include <stdio.h>
40#include <string.h>
41
42#include "interface.h"
43#include "addrtoname.h"
44#include "ethertype.h"
45
46#include "ether.h"
47#include "ipfc.h"
48
49/*
50 * RFC 2625 IP-over-Fibre Channel.
51 */
52
53/* Extract src, dst addresses */
54static inline void
55extract_ipfc_addrs(const struct ipfc_header *ipfcp, char *ipfcsrc,
56    char *ipfcdst)
57{
58	/*
59	 * We assume that, as per RFC 2625, the lower 48 bits of the
60	 * source and destination addresses are MAC addresses.
61	 */
62	memcpy(ipfcdst, (const char *)&ipfcp->ipfc_dhost[2], 6);
63	memcpy(ipfcsrc, (const char *)&ipfcp->ipfc_shost[2], 6);
64}
65
66/*
67 * Print the Network_Header
68 */
69static inline void
70ipfc_hdr_print(register const struct ipfc_header *ipfcp _U_,
71	   register u_int length, register const u_char *ipfcsrc,
72	   register const u_char *ipfcdst)
73{
74	const char *srcname, *dstname;
75
76	srcname = etheraddr_string(ipfcsrc);
77	dstname = etheraddr_string(ipfcdst);
78
79	/*
80	 * XXX - show the upper 16 bits?  Do so only if "vflag" is set?
81	 */
82	(void) printf("%s %s %d: ", srcname, dstname, length);
83}
84
85static void
86ipfc_print(const u_char *p, u_int length, u_int caplen)
87{
88	const struct ipfc_header *ipfcp = (const struct ipfc_header *)p;
89	struct ether_header ehdr;
90	u_short extracted_ethertype;
91
92	if (caplen < IPFC_HDRLEN) {
93		printf("[|ipfc]");
94		return;
95	}
96	/*
97	 * Get the network addresses into a canonical form
98	 */
99	extract_ipfc_addrs(ipfcp, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));
100
101	if (eflag)
102		ipfc_hdr_print(ipfcp, length, ESRC(&ehdr), EDST(&ehdr));
103
104	/* Skip over Network_Header */
105	length -= IPFC_HDRLEN;
106	p += IPFC_HDRLEN;
107	caplen -= IPFC_HDRLEN;
108
109	/* Try to print the LLC-layer header & higher layers */
110	if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
111	    &extracted_ethertype) == 0) {
112		/*
113		 * Some kinds of LLC packet we cannot
114		 * handle intelligently
115		 */
116		if (!eflag)
117			ipfc_hdr_print(ipfcp, length + IPFC_HDRLEN,
118			    ESRC(&ehdr), EDST(&ehdr));
119		if (extracted_ethertype) {
120			printf("(LLC %s) ",
121		etherproto_string(htons(extracted_ethertype)));
122		}
123		if (!suppress_default_print)
124			default_print(p, caplen);
125	}
126}
127
128/*
129 * This is the top level routine of the printer.  'p' points
130 * to the Network_Header of the packet, 'h->ts' is the timestamp,
131 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
132 * is the number of bytes actually captured.
133 */
134u_int
135ipfc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
136{
137	ipfc_print(p, h->len, h->caplen);
138
139	return (IPFC_HDRLEN);
140}
141