142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/* $NetBSD: print-atm.c,v 1.4 2002/05/31 09:45:45 itojun Exp $ */
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/*
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* Copyright (c) 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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static const char rcsid[] =
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"@(#) Header: /tcpdump/master/tcpdump/print-atm.c,v 1.23 2002/04/07 10:05:40 guy Exp (LBL)";
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#else
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__RCSID("$NetBSD: print-atm.c,v 1.4 2002/05/31 09:45:45 itojun Exp $");
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#endif
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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 <sys/param.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <pcap.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "ethertype.h"
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#include "ether.h"
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/*
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* Print an RFC 1483 LLC-encapsulated ATM frame.
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*/
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static void
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atm_llc_print(const u_char *p, int length, int caplen)
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{
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struct ether_header ehdr;
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u_short ether_type;
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u_short extracted_ethertype;
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ether_type = p[6] << 8 | p[7];
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/*
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* Fake up an Ethernet header for the benefit of printers that
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* insist on "packetp" pointing to an Ethernet header.
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*/
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memset(&ehdr, '\0', sizeof ehdr);
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/*
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* Some printers want to get back at the ethernet addresses,
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* and/or check that they're not walking off the end of the packet.
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* Rather than pass them all the way down, we set these globals.
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*/
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snapend = p + caplen;
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/*
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* Actually, the only printers that use packetp are print-arp.c
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* and print-bootp.c, and they assume that packetp points to an
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* Ethernet header. The right thing to do is to fix them to know
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* which link type is in use when they excavate. XXX
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*/
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packetp = (u_char *)&ehdr;
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if (!llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
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&extracted_ethertype)) {
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/* ether_type not known, print raw packet */
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if (extracted_ethertype) {
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printf("(LLC %s) ",
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etherproto_string(htons(extracted_ethertype)));
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}
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if (!xflag && !qflag)
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default_print(p, caplen);
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}
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}
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/*
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* This is the top level routine of the printer. 'p' is the points
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* to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
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* 'length' is the length of the packet off the wire, and '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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atm_if_print(u_char *user, 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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++infodelay;
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ts_print(&h->ts);
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if (caplen < 8) {
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printf("[|atm]");
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goto out;
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}
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if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
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/*
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* XXX - assume 802.6 MAC header from Fore driver.
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* XXX - should we also assume it's not a MAC header
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* if it begins with 0xfe 0xfe 0x03, for RFC 2684
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* routed NLPID-formatted PDUs?
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*/
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if (eflag)
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printf("%04x%04x %04x%04x ",
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p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
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p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
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p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
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p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
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p += 20;
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length -= 20;
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caplen -= 20;
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}
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atm_llc_print(p, length, caplen);
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if (xflag)
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default_print(p, caplen);
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out:
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putchar('\n');
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--infodelay;
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if (infoprint)
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info(0);
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}
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