166 lines
4.8 KiB
C
166 lines
4.8 KiB
C
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/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
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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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* Hacked version of print-ether.c Larry Lile <lile@stdio.com>
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*/
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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header$";
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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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#if __STDC__
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struct mbuf;
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struct rtentry;
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#endif
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#include <net/if.h>
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#include "token.h"
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#include <netinet/in.h>
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#include <net/ethernet.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcpip.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 "addrtoname.h"
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#include "ethertype.h"
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#include "llc.h"
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const u_char *packetp;
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const u_char *snapend;
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static inline void
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token_print(register const u_char *bp, u_int length)
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{
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register const struct token_header *tp;
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register const struct llc *lp;
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u_short ether_type;
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tp = (const struct token_header *)bp;
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lp = (struct llc *)(bp + TOKEN_HDR_LEN);
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if (IS_SOURCE_ROUTED)
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lp = (struct llc *)(bp + TOKEN_HDR_LEN + RIF_LENGTH);
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/*
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* Ethertype on ethernet is a short, but ethertype in an llc-snap has
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* been defined as 2 u_chars. This is a stupid little hack to fix
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* this for now but something better should be done using ntohs()
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* XXX
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*/
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ether_type = ((u_short)lp->ethertype[1] << 16) | lp->ethertype[0];
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if (qflag)
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(void)printf("%s %s %d: ",
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etheraddr_string(ESRC(tp)),
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etheraddr_string(EDST(tp)),
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length);
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else
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(void)printf("%s %s %s %d: ",
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etheraddr_string(ESRC(tp)),
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etheraddr_string(EDST(tp)),
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etherproto_string(ether_type),
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length);
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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 ether 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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token_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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struct token_header *tp;
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u_short ether_type;
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extern u_short extracted_ethertype;
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u_int route_len = 0;
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struct llc *lp;
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tp = (struct token_header *)p;
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ts_print(&h->ts);
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if (caplen < TOKEN_HDR_LEN) {
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printf("[|token-ring]");
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goto out;
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}
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if (eflag)
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token_print(p, length);
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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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tp = (struct token_header *)p;
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/* Adjust for source routing information in the MAC header */
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if (IS_SOURCE_ROUTED) {
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route_len = RIF_LENGTH;
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}
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/* Set pointer to llc header, adjusted for routing information */
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lp = (struct llc *)(p + TOKEN_HDR_LEN + route_len);
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packetp = p;
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snapend = p + caplen;
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/* Skip over token ring MAC header */
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length -= TOKEN_HDR_LEN + route_len;
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caplen -= TOKEN_HDR_LEN + route_len;
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p += TOKEN_HDR_LEN + route_len;
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ether_type = ntohs((int)lp->ethertype);
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extracted_ethertype = 0;
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/* Try to print the LLC-layer header & higher layers */
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if (llc_print(p, length, caplen, ESRC(tp), EDST(tp)) == 0) {
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/* ether_type not known, print raw packet */
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if (!eflag)
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token_print((u_char *)tp, length);
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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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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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}
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