The Tcpdump Group git mirrors - tcpdump/blob - print-igrp.c

   1 /*
   2  * Copyright (c) 1996, 1997
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  *
  21  * Initial contribution from Francis Dupont (francis.dupont@inria.fr)
  22  */
  23
  24 #ifndef lint
  25 static const char rcsid[] _U_ =
  26     "@(#) $Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.18.2.2 2003-11-16 08:51:26 guy Exp $ (LBL)";
  27 #endif
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include <tcpdump-stdinc.h>
  34
  35 #include <stdio.h>
  36
  37 #include "interface.h"
  38 #include "addrtoname.h"
  39 #include "igrp.h"
  40 #include "ip.h"
  41 #include "extract.h"                    /* must come after interface.h */
  42
  43 static void
  44 igrp_entry_print(register struct igrprte *igr, register int is_interior,
  45     register int is_exterior)
  46 {
  47         register u_int delay, bandwidth;
  48         u_int metric, mtu;
  49
  50         if (is_interior)
  51                 printf(" *.%d.%d.%d", igr->igr_net[0],
  52                     igr->igr_net[1], igr->igr_net[2]);
  53         else if (is_exterior)
  54                 printf(" X%d.%d.%d.0", igr->igr_net[0],
  55                     igr->igr_net[1], igr->igr_net[2]);
  56         else
  57                 printf(" %d.%d.%d.0", igr->igr_net[0],
  58                     igr->igr_net[1], igr->igr_net[2]);
  59
  60         delay = EXTRACT_24BITS(igr->igr_dly);
  61         bandwidth = EXTRACT_24BITS(igr->igr_bw);
  62         metric = bandwidth + delay;
  63         if (metric > 0xffffff)
  64                 metric = 0xffffff;
  65         mtu = EXTRACT_16BITS(igr->igr_mtu);
  66
  67         printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
  68             10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
  69             igr->igr_rel, igr->igr_ld, metric,
  70             mtu, igr->igr_hct);
  71 }
  72
  73 static struct tok op2str[] = {
  74         { IGRP_UPDATE,          "update" },
  75         { IGRP_REQUEST,         "request" },
  76         { 0,                    NULL }
  77 };
  78
  79 void
  80 igrp_print(register const u_char *bp, u_int length, register const u_char *bp2)
  81 {
  82         register struct igrphdr *hdr;
  83         register struct ip *ip;
  84         register u_char *cp;
  85         u_int nint, nsys, next;
  86
  87         hdr = (struct igrphdr *)bp;
  88         ip = (struct ip *)bp2;
  89         cp = (u_char *)(hdr + 1);
  90         (void)printf("igrp:");
  91
  92         /* Header */
  93         TCHECK(*hdr);
  94         nint = EXTRACT_16BITS(&hdr->ig_ni);
  95         nsys = EXTRACT_16BITS(&hdr->ig_ns);
  96         next = EXTRACT_16BITS(&hdr->ig_nx);
  97
  98         (void)printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
  99             tok2str(op2str, "op-#%d", IGRP_OP(hdr->ig_vop)),
 100             IGRP_V(hdr->ig_vop),
 101             hdr->ig_ed,
 102             EXTRACT_16BITS(&hdr->ig_as),
 103             nint,
 104             nsys,
 105             next);
 106
 107         length -= sizeof(*hdr);
 108         while (length >= IGRP_RTE_SIZE) {
 109                 if (nint > 0) {
 110                         TCHECK2(*cp, IGRP_RTE_SIZE);
 111                         igrp_entry_print((struct igrprte *)cp, 1, 0);
 112                         --nint;
 113                 } else if (nsys > 0) {
 114                         TCHECK2(*cp, IGRP_RTE_SIZE);
 115                         igrp_entry_print((struct igrprte *)cp, 0, 0);
 116                         --nsys;
 117                 } else if (next > 0) {
 118                         TCHECK2(*cp, IGRP_RTE_SIZE);
 119                         igrp_entry_print((struct igrprte *)cp, 0, 1);
 120                         --next;
 121                 } else {
 122                         (void)printf(" [extra bytes %d]", length);
 123                         break;
 124                 }
 125                 cp += IGRP_RTE_SIZE;
 126                 length -= IGRP_RTE_SIZE;
 127         }
 128         if (nint == 0 && nsys == 0 && next == 0)
 129                 return;
 130 trunc:
 131         fputs(" [|igrp]", stdout);
 132 }