dist/tcpdump/print-sunatm.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1997 Yen Yen Lim and North Dakota State University
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Yen Yen Lim and
  18         North Dakota State University
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  25  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  30  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  31  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  */
  34 #include <sys/cdefs.h>
  35 #ifndef lint
  36 #if 0
  37 static const char rcsid[] _U_ =
  38     "@(#) Header: /tcpdump/master/tcpdump/print-sunatm.c,v 1.8 2004/03/17 23:24:38 guy Exp (LBL)";
  39 #else
  40 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  41 #endif
  42 #endif
  43
  44 #ifdef HAVE_CONFIG_H
  45 #include "config.h"
  46 #endif
  47
  48 #include <tcpdump-stdinc.h>
  49
  50 struct mbuf;
  51 struct rtentry;
  52
  53 #include <stdio.h>
  54 #include <pcap.h>
  55
  56 #include "interface.h"
  57 #include "extract.h"
  58 #include "addrtoname.h"
  59
  60 #include "atm.h"
  61 #include "atmuni31.h"
  62
  63 /* SunATM header for ATM packet */
  64 #define DIR_POS         0       /* Direction (0x80 = transmit, 0x00 = receive) */
  65 #define VPI_POS         1       /* VPI */
  66 #define VCI_POS         2       /* VCI */
  67 #define PKT_BEGIN_POS   4       /* Start of the ATM packet */
  68
  69 /* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */
  70 #define PT_LANE         0x01    /* LANE */
  71 #define PT_LLC          0x02    /* LLC encapsulation */
  72
  73 /*
  74  * This is the top level routine of the printer.  'p' points
  75  * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp,
  76  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  77  * is the number of bytes actually captured.
  78  */
  79 u_int
  80 sunatm_if_print(const struct pcap_pkthdr *h, const u_char *p)
  81 {
  82         u_int caplen = h->caplen;
  83         u_int length = h->len;
  84         u_short vci;
  85         u_char vpi;
  86         u_int traftype;
  87
  88         if (caplen < PKT_BEGIN_POS) {
  89                 printf("[|atm]");
  90                 return (caplen);
  91         }
  92
  93         if (eflag) {
  94                 if (p[DIR_POS] & 0x80)
  95                         printf("Tx: ");
  96                 else
  97                         printf("Rx: ");
  98         }
  99
 100         switch (p[DIR_POS] & 0x0f) {
 101
 102         case PT_LANE:
 103                 traftype = ATM_LANE;
 104                 break;
 105
 106         case PT_LLC:
 107                 traftype = ATM_LLC;
 108                 break;
 109
 110         default:
 111                 traftype = ATM_UNKNOWN;
 112                 break;
 113         }
 114
 115         vci = EXTRACT_16BITS(&p[VCI_POS]);
 116         vpi = p[VPI_POS];
 117
 118         p += PKT_BEGIN_POS;
 119         caplen -= PKT_BEGIN_POS;
 120         length -= PKT_BEGIN_POS;
 121         atm_print(vpi, vci, traftype, p, length, caplen);
 122
 123         return (PKT_BEGIN_POS);
 124 }