tcpdump.tproj/print-null.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1991, 1993, 1994, 1995, 1996
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that: (1) source code distributions
  30  * retain the above copyright notice and this paragraph in its entirety, (2)
  31  * distributions including binary code include the above copyright notice and
  32  * this paragraph in its entirety in the documentation or other materials
  33  * provided with the distribution, and (3) all advertising materials mentioning
  34  * features or use of this software display the following acknowledgement:
  35  * ``This product includes software developed by the University of California,
  36  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  37  * the University nor the names of its contributors may be used to endorse
  38  * or promote products derived from this software without specific prior
  39  * written permission.
  40  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  41  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  42  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  43  */
  44
  45 #ifndef lint
  46 static const char rcsid[] =
  47     "@(#) $Header: /cvs/Darwin/Commands/NeXT/network_cmds/tcpdump.tproj/print-null.c,v 1.1.1.1 1999/05/02 03:58:34 wsanchez Exp $ (LBL)";
  48 #endif
  49
  50 #include <sys/param.h>
  51 #include <sys/time.h>
  52 #include <sys/socket.h>
  53 #include <sys/file.h>
  54 #include <sys/ioctl.h>
  55
  56 #if __STDC__
  57 struct mbuf;
  58 struct rtentry;
  59 #endif
  60 #include <net/if.h>
  61
  62 #include <netinet/in.h>
  63 #include <netinet/in_systm.h>
  64 #include <netinet/ip.h>
  65 #include <netinet/if_ether.h>
  66 #include <netinet/ip_var.h>
  67 #include <netinet/udp.h>
  68 #include <netinet/udp_var.h>
  69 #include <netinet/tcp.h>
  70 #include <netinet/tcpip.h>
  71
  72 #include <pcap.h>
  73 #include <stdio.h>
  74 #include <string.h>
  75
  76 #include "addrtoname.h"
  77 #include "interface.h"
  78
  79 #define NULL_HDRLEN 4
  80
  81 #ifndef AF_NS
  82 #define AF_NS           6               /* XEROX NS protocols */
  83 #endif
  84
  85 static void
  86 null_print(const u_char *p, const struct ip *ip, u_int length)
  87 {
  88         u_int family;
  89
  90         memcpy((char *)&family, (char *)p, sizeof(family));
  91
  92         if (nflag) {
  93                 /* XXX just dump the header */
  94                 return;
  95         }
  96         switch (family) {
  97
  98         case AF_INET:
  99                 printf("ip: ");
 100                 break;
 101
 102         case AF_NS:
 103                 printf("ns: ");
 104                 break;
 105
 106         default:
 107                 printf("AF %d: ", family);
 108                 break;
 109         }
 110 }
 111
 112 void
 113 null_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
 114 {
 115         u_int length = h->len;
 116         u_int caplen = h->caplen;
 117         const struct ip *ip;
 118
 119         ts_print(&h->ts);
 120
 121         /*
 122          * Some printers want to get back at the link level addresses,
 123          * and/or check that they're not walking off the end of the packet.
 124          * Rather than pass them all the way down, we set these globals.
 125          */
 126         packetp = p;
 127         snapend = p + caplen;
 128
 129         length -= NULL_HDRLEN;
 130
 131         ip = (struct ip *)(p + NULL_HDRLEN);
 132
 133         if (eflag)
 134                 null_print(p, ip, length);
 135
 136         ip_print((const u_char *)ip, length);
 137
 138         if (xflag)
 139                 default_print((const u_char *)ip, caplen - NULL_HDRLEN);
 140         putchar('\n');
 141 }
 142