124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
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* Copyright (c) 1991, 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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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: print-null.c,v 1.24 97/05/28 12:52:47 leres Exp $ (LBL)";
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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 <sys/file.h>
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#include <sys/ioctl.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 <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <net/ethernet.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 <pcap.h>
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#include <stdio.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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#ifndef AF_NS
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#define AF_NS 6 /* XEROX NS protocols */
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#endif
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/*
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* The DLT_NULL packet header is 4 bytes long. It contains a network
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* order 32 bit integer that specifies the family, e.g. AF_INET
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*/
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#define NULL_HDRLEN 4
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static void
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null_print(const u_char *p, const struct ip *ip, u_int length)
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{
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u_int family;
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memcpy((char *)&family, (char *)p, sizeof(family));
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if (nflag) {
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/* XXX just dump the header */
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return;
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}
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switch (family) {
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case AF_INET:
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printf("ip: ");
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break;
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case AF_NS:
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printf("ns: ");
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break;
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default:
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printf("AF %d: ", family);
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break;
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}
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}
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void
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null_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
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{
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u_int length = h->len;
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u_int caplen = h->caplen;
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const struct ip *ip;
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ts_print(&h->ts);
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/*
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* Some printers want to get back at the link level 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 -= NULL_HDRLEN;
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ip = (struct ip *)(p + NULL_HDRLEN);
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if (eflag)
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null_print(p, ip, length);
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ip_print((const u_char *)ip, length);
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if (xflag)
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default_print((const u_char *)ip, caplen - NULL_HDRLEN);
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putchar('\n');
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}
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