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https://github.com/the-tcpdump-group/tcpdump.git
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77694ea04d
Add an nd_eui64 type, and use it. Have routines to convert EUI-64s to a string for both the "rightmost octet first" and "rightmost octet last" format. Use the former for IEEE 802.14.4 addresses and the latter for IEEE 1394 addresses in the "Apple IP over FireWire" header.
119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* \summary: Apple IP-over-IEEE 1394 printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#define ND_LONGJMP_FROM_TCHECK
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#include "netdissect.h"
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#include "extract.h"
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#include "addrtoname.h"
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#include "ethertype.h"
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/*
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* Structure of a header for Apple's IP-over-IEEE 1384 BPF header.
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*/
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struct firewire_header {
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nd_eui64 firewire_dhost;
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nd_eui64 firewire_shost;
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nd_uint16_t firewire_type;
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};
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/*
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* Length of that header; note that some compilers may pad
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* "struct firewire_header" to a multiple of 4 bytes, for example, so
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* "sizeof (struct firewire_header)" may not give the right answer.
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* (That could be true even though we're using nd_ types, none of
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* which should require anything more than byte alignment.)
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*/
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#define FIREWIRE_HDRLEN 18
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static void
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ap1394_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
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{
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const struct firewire_header *fp;
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uint16_t firewire_type;
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fp = (const struct firewire_header *)bp;
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ND_PRINT("%s > %s",
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eui64_string(ndo, fp->firewire_shost),
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eui64_string(ndo, fp->firewire_dhost));
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firewire_type = GET_BE_U_2(fp->firewire_type);
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if (!ndo->ndo_qflag) {
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ND_PRINT(", ethertype %s (0x%04x)",
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tok2str(ethertype_values,"Unknown", firewire_type),
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firewire_type);
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} else {
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ND_PRINT(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", firewire_type));
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}
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ND_PRINT(", length %u: ", length);
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}
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/*
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* This is the top level routine of the printer. 'p' points
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* to the ether header of the packet, 'h->ts' is the timestamp,
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* 'h->len' is the length of the packet off the wire, and 'h->caplen'
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* is the number of bytes actually captured.
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*/
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void
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ap1394_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
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{
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u_int length = h->len;
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u_int caplen = h->caplen;
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const struct firewire_header *fp;
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u_short ether_type;
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struct lladdr_info src, dst;
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ndo->ndo_protocol = "ap1394";
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ND_TCHECK_LEN(p, FIREWIRE_HDRLEN);
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ndo->ndo_ll_hdr_len += FIREWIRE_HDRLEN;
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if (ndo->ndo_eflag)
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ap1394_hdr_print(ndo, p, length);
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length -= FIREWIRE_HDRLEN;
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caplen -= FIREWIRE_HDRLEN;
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fp = (const struct firewire_header *)p;
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p += FIREWIRE_HDRLEN;
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ether_type = GET_BE_U_2(fp->firewire_type);
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src.addr = fp->firewire_shost;
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src.addr_string = eui64_string;
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dst.addr = fp->firewire_dhost;
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dst.addr_string = eui64_string;
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if (ethertype_print(ndo, ether_type, p, length, caplen, &src, &dst) == 0) {
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/* ether_type not known, print raw packet */
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if (!ndo->ndo_eflag)
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ap1394_hdr_print(ndo, (const u_char *)fp, length + FIREWIRE_HDRLEN);
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if (!ndo->ndo_suppress_default_print)
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ND_DEFAULTPRINT(p, caplen);
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}
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}
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