127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
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* Copyright (c) 1988-1990 The Regents of the University of California.
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* 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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* $Id: print-ether.c,v 1.2 1994/12/23 17:06:15 cgd Exp $
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*/
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#ifndef lint
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static char rcsid[] =
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"@(#) Header: print-ether.c,v 1.22 91/10/07 20:18:28 leres Exp (LBL)";
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#endif
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.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 "interface.h"
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#include "addrtoname.h"
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u_char *packetp;
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u_char *snapend;
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static inline void
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ether_print(ep, length)
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register struct ether_header *ep;
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int length;
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{
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if (qflag)
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(void)printf("%s %s %d: ",
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etheraddr_string(ESRC(ep)),
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etheraddr_string(EDST(ep)),
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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(ep)),
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etheraddr_string(EDST(ep)),
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etherproto_string(ep->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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ether_if_print(p, tvp, length, caplen)
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u_char *p;
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struct timeval *tvp;
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int length;
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int caplen;
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{
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struct ether_header *ep;
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register int i;
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ts_print(tvp);
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if (caplen < sizeof(struct ether_header)) {
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printf("[|ether]");
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goto out;
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}
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if (eflag)
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ether_print((struct ether_header *)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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packetp = p;
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snapend = p + caplen;
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length -= sizeof(struct ether_header);
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ep = (struct ether_header *)p;
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p += sizeof(struct ether_header);
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switch (ntohs(ep->ether_type)) {
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case ETHERTYPE_IP:
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ip_print((struct ip *)p, length);
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break;
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case ETHERTYPE_ARP:
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case ETHERTYPE_REVARP:
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arp_print((struct ether_arp *)p, length, caplen - sizeof(*ep));
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break;
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default:
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if (!eflag)
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ether_print(ep, length);
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if (!xflag && !qflag)
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default_print((u_short *)p, caplen - sizeof(*ep));
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break;
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}
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if (xflag)
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default_print((u_short *)p, caplen - sizeof(*ep));
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out:
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putchar('\n');
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}
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