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c8cf0f94 PA |
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 | ||
411677ae AL |
22 | /* \summary: IP over Fibre Channel printer */ |
23 | ||
24 | /* specification: RFC 2625 */ | |
c8cf0f94 PA |
25 | |
26 | #ifdef HAVE_CONFIG_H | |
ed775ee7 | 27 | #include <config.h> |
c8cf0f94 PA |
28 | #endif |
29 | ||
ed775ee7 | 30 | #include "netdissect-stdinc.h" |
c8cf0f94 | 31 | |
c8cf0f94 PA |
32 | #include <string.h> |
33 | ||
ed775ee7 | 34 | #define ND_LONGJMP_FROM_TCHECK |
411677ae | 35 | #include "netdissect.h" |
c8cf0f94 | 36 | #include "addrtoname.h" |
c8cf0f94 | 37 | |
c8cf0f94 | 38 | |
411677ae | 39 | struct ipfc_header { |
ed775ee7 AHJ |
40 | nd_byte ipfc_dhost[2+MAC_ADDR_LEN]; |
41 | nd_byte ipfc_shost[2+MAC_ADDR_LEN]; | |
411677ae AL |
42 | }; |
43 | ||
44 | #define IPFC_HDRLEN 16 | |
c8cf0f94 PA |
45 | |
46 | /* Extract src, dst addresses */ | |
ed775ee7 | 47 | static void |
c8cf0f94 | 48 | extract_ipfc_addrs(const struct ipfc_header *ipfcp, char *ipfcsrc, |
ed775ee7 | 49 | char *ipfcdst) |
c8cf0f94 PA |
50 | { |
51 | /* | |
52 | * We assume that, as per RFC 2625, the lower 48 bits of the | |
53 | * source and destination addresses are MAC addresses. | |
54 | */ | |
ed775ee7 AHJ |
55 | memcpy(ipfcdst, (const char *)&ipfcp->ipfc_dhost[2], MAC_ADDR_LEN); |
56 | memcpy(ipfcsrc, (const char *)&ipfcp->ipfc_shost[2], MAC_ADDR_LEN); | |
c8cf0f94 PA |
57 | } |
58 | ||
59 | /* | |
60 | * Print the Network_Header | |
61 | */ | |
ed775ee7 | 62 | static void |
411677ae | 63 | ipfc_hdr_print(netdissect_options *ndo, |
ed775ee7 AHJ |
64 | const struct ipfc_header *ipfcp _U_, u_int length, |
65 | const u_char *ipfcsrc, const u_char *ipfcdst) | |
c8cf0f94 PA |
66 | { |
67 | const char *srcname, *dstname; | |
68 | ||
411677ae AL |
69 | srcname = etheraddr_string(ndo, ipfcsrc); |
70 | dstname = etheraddr_string(ndo, ipfcdst); | |
c8cf0f94 PA |
71 | |
72 | /* | |
411677ae AL |
73 | * XXX - should we show the upper 16 bits of the addresses? |
74 | * Do so only if "vflag" is set? | |
75 | * Section 3.3 "FC Port and Node Network Addresses" says that | |
76 | * | |
77 | * In this specification, both the Source and Destination | |
78 | * 4-bit NAA identifiers SHALL be set to binary '0001' | |
79 | * indicating that an IEEE 48-bit MAC address is contained | |
80 | * in the lower 48 bits of the network address fields. The | |
81 | * high order 12 bits in the network address fields SHALL | |
82 | * be set to 0x0000. | |
83 | * | |
84 | * so, for captures following this specification, the upper 16 | |
85 | * bits should be 0x1000, followed by a MAC address. | |
c8cf0f94 | 86 | */ |
ed775ee7 | 87 | ND_PRINT("%s > %s, length %u: ", srcname, dstname, length); |
c8cf0f94 PA |
88 | } |
89 | ||
411677ae AL |
90 | static u_int |
91 | ipfc_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen) | |
c8cf0f94 PA |
92 | { |
93 | const struct ipfc_header *ipfcp = (const struct ipfc_header *)p; | |
ed775ee7 | 94 | nd_mac_addr srcmac, dstmac; |
411677ae AL |
95 | struct lladdr_info src, dst; |
96 | int llc_hdrlen; | |
c8cf0f94 | 97 | |
ed775ee7 AHJ |
98 | ndo->ndo_protocol = "ipfc"; |
99 | ND_TCHECK_LEN(p, IPFC_HDRLEN); | |
c8cf0f94 PA |
100 | /* |
101 | * Get the network addresses into a canonical form | |
102 | */ | |
ed775ee7 | 103 | extract_ipfc_addrs(ipfcp, (char *)srcmac, (char *)dstmac); |
c8cf0f94 | 104 | |
411677ae | 105 | if (ndo->ndo_eflag) |
ed775ee7 | 106 | ipfc_hdr_print(ndo, ipfcp, length, srcmac, dstmac); |
411677ae | 107 | |
ed775ee7 | 108 | src.addr = srcmac; |
411677ae | 109 | src.addr_string = etheraddr_string; |
ed775ee7 | 110 | dst.addr = dstmac; |
411677ae | 111 | dst.addr_string = etheraddr_string; |
c8cf0f94 PA |
112 | |
113 | /* Skip over Network_Header */ | |
114 | length -= IPFC_HDRLEN; | |
115 | p += IPFC_HDRLEN; | |
116 | caplen -= IPFC_HDRLEN; | |
117 | ||
118 | /* Try to print the LLC-layer header & higher layers */ | |
411677ae AL |
119 | llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst); |
120 | if (llc_hdrlen < 0) { | |
c8cf0f94 PA |
121 | /* |
122 | * Some kinds of LLC packet we cannot | |
123 | * handle intelligently | |
124 | */ | |
411677ae AL |
125 | if (!ndo->ndo_suppress_default_print) |
126 | ND_DEFAULTPRINT(p, caplen); | |
127 | llc_hdrlen = -llc_hdrlen; | |
c8cf0f94 | 128 | } |
411677ae | 129 | return (IPFC_HDRLEN + llc_hdrlen); |
c8cf0f94 PA |
130 | } |
131 | ||
132 | /* | |
133 | * This is the top level routine of the printer. 'p' points | |
134 | * to the Network_Header of the packet, 'h->ts' is the timestamp, | |
135 | * 'h->len' is the length of the packet off the wire, and 'h->caplen' | |
136 | * is the number of bytes actually captured. | |
137 | */ | |
ed775ee7 AHJ |
138 | void |
139 | ipfc_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) | |
c8cf0f94 | 140 | { |
ed775ee7 AHJ |
141 | ndo->ndo_protocol = "ipfc"; |
142 | ndo->ndo_ll_hdr_len += ipfc_print(ndo, p, h->len, h->caplen); | |
c8cf0f94 | 143 | } |