dist/tcpdump/print-ipfc.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 #include <sys/cdefs.h>
  25 #ifndef lint
  26 #if 0
  27 static const char rcsid[] _U_ =
  28     "@(#) Header: /tcpdump/master/tcpdump/print-ipfc.c,v 1.7.2.2 2005/11/13 12:12:59 guy Exp (LBL)";
  29 #else
  30 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  31 #endif
  32 #endif
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #endif
  37
  38 #include <tcpdump-stdinc.h>
  39
  40 #include <pcap.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43
  44 #include "interface.h"
  45 #include "addrtoname.h"
  46 #include "ethertype.h"
  47
  48 #include "ether.h"
  49 #include "ipfc.h"
  50
  51 /*
  52  * RFC 2625 IP-over-Fibre Channel.
  53  */
  54
  55 /* Extract src, dst addresses */
  56 static inline void
  57 extract_ipfc_addrs(const struct ipfc_header *ipfcp, char *ipfcsrc,
  58     char *ipfcdst)
  59 {
  60         /*
  61          * We assume that, as per RFC 2625, the lower 48 bits of the
  62          * source and destination addresses are MAC addresses.
  63          */
  64         memcpy(ipfcdst, (const char *)&ipfcp->ipfc_dhost[2], 6);
  65         memcpy(ipfcsrc, (const char *)&ipfcp->ipfc_shost[2], 6);
  66 }
  67
  68 /*
  69  * Print the Network_Header
  70  */
  71 static inline void
  72 ipfc_hdr_print(register const struct ipfc_header *ipfcp _U_,
  73            register u_int length, register const u_char *ipfcsrc,
  74            register const u_char *ipfcdst)
  75 {
  76         const char *srcname, *dstname;
  77
  78         srcname = etheraddr_string(ipfcsrc);
  79         dstname = etheraddr_string(ipfcdst);
  80
  81         /*
  82          * XXX - show the upper 16 bits?  Do so only if "vflag" is set?
  83          */
  84         (void) printf("%s %s %d: ", srcname, dstname, length);
  85 }
  86
  87 static void
  88 ipfc_print(const u_char *p, u_int length, u_int caplen)
  89 {
  90         const struct ipfc_header *ipfcp = (const struct ipfc_header *)p;
  91         struct ether_header ehdr;
  92         u_short extracted_ethertype;
  93
  94         if (caplen < IPFC_HDRLEN) {
  95                 printf("[|ipfc]");
  96                 return;
  97         }
  98         /*
  99          * Get the network addresses into a canonical form
 100          */
 101         extract_ipfc_addrs(ipfcp, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));
 102
 103         if (eflag)
 104                 ipfc_hdr_print(ipfcp, length, ESRC(&ehdr), EDST(&ehdr));
 105
 106         /* Skip over Network_Header */
 107         length -= IPFC_HDRLEN;
 108         p += IPFC_HDRLEN;
 109         caplen -= IPFC_HDRLEN;
 110
 111         /* Try to print the LLC-layer header & higher layers */
 112         if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
 113             &extracted_ethertype) == 0) {
 114                 /*
 115                  * Some kinds of LLC packet we cannot
 116                  * handle intelligently
 117                  */
 118                 if (!eflag)
 119                         ipfc_hdr_print(ipfcp, length + IPFC_HDRLEN,
 120                             ESRC(&ehdr), EDST(&ehdr));
 121                 if (extracted_ethertype) {
 122                         printf("(LLC %s) ",
 123                 etherproto_string(htons(extracted_ethertype)));
 124                 }
 125                 if (!suppress_default_print)
 126                         default_print(p, caplen);
 127         }
 128 }
 129
 130 /*
 131  * This is the top level routine of the printer.  'p' points
 132  * to the Network_Header of the packet, 'h->ts' is the timestamp,
 133  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 134  * is the number of bytes actually captured.
 135  */
 136 u_int
 137 ipfc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
 138 {
 139         ipfc_print(p, h->len, h->caplen);
 140
 141         return (IPFC_HDRLEN);
 142 }