dist/tcpdump/print-igrp.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 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  * Initial contribution from Francis Dupont (francis.dupont@inria.fr)
  24  */
  25
  26 #include <sys/cdefs.h>
  27 #ifndef lint
  28 #if 0
  29 static const char rcsid[] _U_ =
  30     "@(#) Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.20.2.1 2005/04/20 21:02:15 guy Exp (LBL)";
  31 #else
  32 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  33 #endif
  34 #endif
  35
  36 #ifdef HAVE_CONFIG_H
  37 #include "config.h"
  38 #endif
  39
  40 #include <tcpdump-stdinc.h>
  41
  42 #include <stdio.h>
  43
  44 #include "interface.h"
  45 #include "addrtoname.h"
  46 #include "igrp.h"
  47 #include "ip.h"
  48 #include "extract.h"                    /* must come after interface.h */
  49
  50 static void
  51 igrp_entry_print(register struct igrprte *igr, register int is_interior,
  52     register int is_exterior)
  53 {
  54         register u_int delay, bandwidth;
  55         u_int metric, mtu;
  56
  57         if (is_interior)
  58                 printf(" *.%d.%d.%d", igr->igr_net[0],
  59                     igr->igr_net[1], igr->igr_net[2]);
  60         else if (is_exterior)
  61                 printf(" X%d.%d.%d.0", igr->igr_net[0],
  62                     igr->igr_net[1], igr->igr_net[2]);
  63         else
  64                 printf(" %d.%d.%d.0", igr->igr_net[0],
  65                     igr->igr_net[1], igr->igr_net[2]);
  66
  67         delay = EXTRACT_24BITS(igr->igr_dly);
  68         bandwidth = EXTRACT_24BITS(igr->igr_bw);
  69         metric = bandwidth + delay;
  70         if (metric > 0xffffff)
  71                 metric = 0xffffff;
  72         mtu = EXTRACT_16BITS(igr->igr_mtu);
  73
  74         printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
  75             10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
  76             igr->igr_rel, igr->igr_ld, metric,
  77             mtu, igr->igr_hct);
  78 }
  79
  80 static struct tok op2str[] = {
  81         { IGRP_UPDATE,          "update" },
  82         { IGRP_REQUEST,         "request" },
  83         { 0,                    NULL }
  84 };
  85
  86 void
  87 igrp_print(register const u_char *bp, u_int length, const u_char *bp2 _U_)
  88 {
  89         register struct igrphdr *hdr;
  90         register u_char *cp;
  91         u_int nint, nsys, next;
  92
  93         hdr = (struct igrphdr *)bp;
  94         cp = (u_char *)(hdr + 1);
  95         (void)printf("igrp:");
  96
  97         /* Header */
  98         TCHECK(*hdr);
  99         nint = EXTRACT_16BITS(&hdr->ig_ni);
 100         nsys = EXTRACT_16BITS(&hdr->ig_ns);
 101         next = EXTRACT_16BITS(&hdr->ig_nx);
 102
 103         (void)printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
 104             tok2str(op2str, "op-#%d", IGRP_OP(hdr->ig_vop)),
 105             IGRP_V(hdr->ig_vop),
 106             hdr->ig_ed,
 107             EXTRACT_16BITS(&hdr->ig_as),
 108             nint,
 109             nsys,
 110             next);
 111
 112         length -= sizeof(*hdr);
 113         while (length >= IGRP_RTE_SIZE) {
 114                 if (nint > 0) {
 115                         TCHECK2(*cp, IGRP_RTE_SIZE);
 116                         igrp_entry_print((struct igrprte *)cp, 1, 0);
 117                         --nint;
 118                 } else if (nsys > 0) {
 119                         TCHECK2(*cp, IGRP_RTE_SIZE);
 120                         igrp_entry_print((struct igrprte *)cp, 0, 0);
 121                         --nsys;
 122                 } else if (next > 0) {
 123                         TCHECK2(*cp, IGRP_RTE_SIZE);
 124                         igrp_entry_print((struct igrprte *)cp, 0, 1);
 125                         --next;
 126                 } else {
 127                         (void)printf(" [extra bytes %d]", length);
 128                         break;
 129                 }
 130                 cp += IGRP_RTE_SIZE;
 131                 length -= IGRP_RTE_SIZE;
 132         }
 133         if (nint == 0 && nsys == 0 && next == 0)
 134                 return;
 135 trunc:
 136         fputs(" [|igrp]", stdout);
 137 }