299 lines
6.8 KiB
C
299 lines
6.8 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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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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* From: NetBSD: print-arcnet.c,v 1.2 2000/04/24 13:02:28 itojun Exp
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-arcnet.c,v 1.20 2005-04-06 21:32:38 mcr Exp $ (LBL)";
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#endif
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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 <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <pcap.h>
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#include "interface.h"
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#include "extract.h"
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#include "arcnet.h"
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static int arcnet_encap_print(u_char arctype, const u_char *p,
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u_int length, u_int caplen);
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struct tok arctypemap[] = {
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{ ARCTYPE_IP_OLD, "oldip" },
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{ ARCTYPE_ARP_OLD, "oldarp" },
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{ ARCTYPE_IP, "ip" },
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{ ARCTYPE_ARP, "arp" },
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{ ARCTYPE_REVARP, "rarp" },
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{ ARCTYPE_ATALK, "atalk" },
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{ ARCTYPE_BANIAN, "banyan" },
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{ ARCTYPE_IPX, "ipx" },
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{ ARCTYPE_INET6, "ipv6" },
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{ ARCTYPE_DIAGNOSE, "diag" },
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{ 0, 0 }
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};
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static inline void
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arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid)
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{
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const struct arc_header *ap;
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const char *arctypename;
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ap = (const struct arc_header *)bp;
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if (qflag) {
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(void)printf("%02x %02x %d: ",
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ap->arc_shost,
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ap->arc_dhost,
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length);
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return;
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}
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arctypename = tok2str(arctypemap, "%02x", ap->arc_type);
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if (!phds) {
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(void)printf("%02x %02x %s %d: ",
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ap->arc_shost, ap->arc_dhost, arctypename,
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length);
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return;
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}
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if (flag == 0) {
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(void)printf("%02x %02x %s seqid %04x %d: ",
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ap->arc_shost, ap->arc_dhost, arctypename, seqid,
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length);
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return;
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}
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if (flag & 1)
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(void)printf("%02x %02x %s seqid %04x "
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"(first of %d fragments) %d: ",
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ap->arc_shost, ap->arc_dhost, arctypename, seqid,
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(flag + 3) / 2, length);
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else
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(void)printf("%02x %02x %s seqid %04x "
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"(fragment %d) %d: ",
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ap->arc_shost, ap->arc_dhost, arctypename, seqid,
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flag/2 + 1, 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 ARCNET 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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u_int
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arcnet_if_print(const struct pcap_pkthdr *h, const u_char *p)
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{
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u_int caplen = h->caplen;
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u_int length = h->len;
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const struct arc_header *ap;
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int phds, flag = 0, archdrlen = 0;
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u_int seqid = 0;
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u_char arc_type;
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if (caplen < ARC_HDRLEN) {
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printf("[|arcnet]");
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return (caplen);
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}
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ap = (const struct arc_header *)p;
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arc_type = ap->arc_type;
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switch (arc_type) {
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default:
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phds = 1;
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break;
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case ARCTYPE_IP_OLD:
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case ARCTYPE_ARP_OLD:
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case ARCTYPE_DIAGNOSE:
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phds = 0;
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archdrlen = ARC_HDRLEN;
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break;
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}
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if (phds) {
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if (caplen < ARC_HDRNEWLEN) {
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arcnet_print(p, length, 0, 0, 0);
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printf("[|phds]");
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return (caplen);
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}
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if (ap->arc_flag == 0xff) {
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if (caplen < ARC_HDRNEWLEN_EXC) {
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arcnet_print(p, length, 0, 0, 0);
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printf("[|phds extended]");
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return (caplen);
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}
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flag = ap->arc_flag2;
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seqid = EXTRACT_16BITS(&ap->arc_seqid2);
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archdrlen = ARC_HDRNEWLEN_EXC;
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} else {
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flag = ap->arc_flag;
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seqid = EXTRACT_16BITS(&ap->arc_seqid);
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archdrlen = ARC_HDRNEWLEN;
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}
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}
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if (eflag)
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arcnet_print(p, length, phds, flag, seqid);
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/*
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* Go past the ARCNET header.
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*/
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length -= archdrlen;
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caplen -= archdrlen;
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p += archdrlen;
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if (phds && flag && (flag & 1) == 0) {
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/*
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* This is a middle fragment.
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*/
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return (archdrlen);
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}
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if (!arcnet_encap_print(arc_type, p, length, caplen))
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default_print(p, caplen);
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return (archdrlen);
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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 ARCNET 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. It is quite similar
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* to the non-Linux style printer except that Linux doesn't ever
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* supply packets that look like exception frames, it always supplies
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* reassembled packets rather than raw frames, and headers have an
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* extra "offset" field between the src/dest and packet type.
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*/
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u_int
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arcnet_linux_if_print(const struct pcap_pkthdr *h, const u_char *p)
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{
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u_int caplen = h->caplen;
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u_int length = h->len;
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const struct arc_linux_header *ap;
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int archdrlen = 0;
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u_char arc_type;
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if (caplen < ARC_LINUX_HDRLEN) {
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printf("[|arcnet]");
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return (caplen);
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}
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ap = (const struct arc_linux_header *)p;
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arc_type = ap->arc_type;
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switch (arc_type) {
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default:
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archdrlen = ARC_LINUX_HDRNEWLEN;
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if (caplen < ARC_LINUX_HDRNEWLEN) {
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printf("[|arcnet]");
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return (caplen);
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}
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break;
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case ARCTYPE_IP_OLD:
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case ARCTYPE_ARP_OLD:
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case ARCTYPE_DIAGNOSE:
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archdrlen = ARC_LINUX_HDRLEN;
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break;
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}
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if (eflag)
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arcnet_print(p, length, 0, 0, 0);
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/*
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* Go past the ARCNET header.
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*/
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length -= archdrlen;
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caplen -= archdrlen;
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p += archdrlen;
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if (!arcnet_encap_print(arc_type, p, length, caplen))
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default_print(p, caplen);
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return (archdrlen);
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}
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/*
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* Prints the packet encapsulated in an ARCnet data field,
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* given the ARCnet system code.
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*
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* Returns non-zero if it can do so, zero if the system code is unknown.
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*/
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static int
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arcnet_encap_print(u_char arctype, const u_char *p,
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u_int length, u_int caplen)
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{
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switch (arctype) {
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case ARCTYPE_IP_OLD:
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case ARCTYPE_IP:
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ip_print(gndo, p, length);
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return (1);
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#ifdef INET6
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case ARCTYPE_INET6:
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ip6_print(gndo, p, length);
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return (1);
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#endif /*INET6*/
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case ARCTYPE_ARP_OLD:
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case ARCTYPE_ARP:
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case ARCTYPE_REVARP:
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arp_print(gndo, p, length, caplen);
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return (1);
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case ARCTYPE_ATALK: /* XXX was this ever used? */
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if (vflag)
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fputs("et1 ", stdout);
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atalk_print(p, length);
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return (1);
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case ARCTYPE_IPX:
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ipx_print(p, length);
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return (1);
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default:
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return (0);
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}
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}
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/*
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* Local Variables:
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* c-style: bsd
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* End:
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*/
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