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- /*
- * Copyright (c) 1988-1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
- #ifndef lint
- static char rcsid[] =
- "@(#) $Header: print-ether.c,v 1.22 91/10/07 20:18:28 leres Exp $ (LBL)";
- #endif
-
- #include <sys/param.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <net/if.h>
- #include <netinet/in.h>
- #include <netinet/if_ether.h>
- #include <netinet/in_systm.h>
- #include <netinet/ip.h>
- #include <netinet/ip_var.h>
- #include <netinet/udp.h>
- #include <netinet/udp_var.h>
- #include <netinet/tcp.h>
- #include <netinet/tcpip.h>
-
- #include "interface.h"
- #include "addrtoname.h"
-
- u_char *packetp;
- u_char *snapend;
-
- static inline void
- ether_print(ep, length)
- register struct ether_header *ep;
- int length;
- {
- if (qflag)
- (void)printf("%s %s %d: ",
- etheraddr_string(ESRC(ep)),
- etheraddr_string(EDST(ep)),
- length);
- else
- (void)printf("%s %s %s %d: ",
- etheraddr_string(ESRC(ep)),
- etheraddr_string(EDST(ep)),
- etherproto_string(ep->ether_type),
- length);
- }
-
- /*
- * This is the top level routine of the printer. 'p' is the points
- * to the ether header of the packet, 'tvp' is the timestamp,
- * 'length' is the length of the packet off the wire, and 'caplen'
- * is the number of bytes actually captured.
- */
- void
- ether_if_print(p, tvp, length, caplen)
- u_char *p;
- struct timeval *tvp;
- int length;
- int caplen;
- {
- struct ether_header *ep;
- register int i;
-
- ts_print(tvp);
-
- if (caplen < sizeof(struct ether_header)) {
- printf("[|ether]");
- goto out;
- }
-
- if (eflag)
- ether_print((struct ether_header *)p, length);
-
- /*
- * Some printers want to get back at the ethernet addresses,
- * and/or check that they're not walking off the end of the packet.
- * Rather than pass them all the way down, we set these globals.
- */
- packetp = p;
- snapend = p + caplen;
-
- length -= sizeof(struct ether_header);
- ep = (struct ether_header *)p;
- p += sizeof(struct ether_header);
- switch (ntohs(ep->ether_type)) {
-
- case ETHERTYPE_IP:
- ip_print((struct ip *)p, length);
- break;
-
- case ETHERTYPE_ARP:
- case ETHERTYPE_REVARP:
- arp_print((struct ether_arp *)p, length, caplen - sizeof(*ep));
- break;
-
- default:
- if (!eflag)
- ether_print(ep, length);
- if (!xflag && !qflag)
- default_print((u_short *)p, caplen - sizeof(*ep));
- break;
- }
- if (xflag)
- default_print((u_short *)p, caplen - sizeof(*ep));
- out:
- putchar('\n');
- }
-