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[] =
  26     "@(#) $Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.16 2001-06-15 22:17:32 fenner Exp $ (LBL)";
  27 #endif
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include <sys/param.h>
  34 #include <sys/types.h>                  /* concession to AIX */
  35 #include <sys/socket.h>
  36
  37 #include <netinet/in.h>
  38
  39 #include <errno.h>
  40 #include <stdio.h>
  41
  42 #include "interface.h"
  43 #include "addrtoname.h"
  44 #include "igrp.h"
  45 #include "ip.h"
  46 #include "extract.h"                    /* must come after interface.h */
  47
  48 static void
  49 igrp_entry_print(register struct igrprte *igr, register int is_interior,
  50     register int is_exterior)
  51 {
  52         register u_int delay, bandwidth;
  53         u_int metric, mtu;
  54
  55         if (is_interior)
  56                 printf(" *.%d.%d.%d", igr->igr_net[0],
  57                     igr->igr_net[1], igr->igr_net[2]);
  58         else if (is_exterior)
  59                 printf(" X%d.%d.%d.0", igr->igr_net[0],
  60                     igr->igr_net[1], igr->igr_net[2]);
  61         else
  62                 printf(" %d.%d.%d.0", igr->igr_net[0],
  63                     igr->igr_net[1], igr->igr_net[2]);
  64
  65         delay = EXTRACT_24BITS(igr->igr_dly);
  66         bandwidth = EXTRACT_24BITS(igr->igr_bw);
  67         metric = bandwidth + delay;
  68         if (metric > 0xffffff)
  69                 metric = 0xffffff;
  70         mtu = EXTRACT_16BITS(igr->igr_mtu);
  71
  72         printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
  73             10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
  74             igr->igr_rel, igr->igr_ld, metric,
  75             mtu, igr->igr_hct);
  76 }
  77
  78 static struct tok op2str[] = {
  79         { IGRP_UPDATE,          "update" },
  80         { IGRP_REQUEST,         "request" },
  81         { 0,                    NULL }
  82 };
  83
  84 void
  85 igrp_print(register const u_char *bp, u_int length, register const u_char *bp2)
  86 {
  87         register struct igrphdr *hdr;
  88         register struct ip *ip;
  89         register u_char *cp;
  90         u_int nint, nsys, next;
  91
  92         hdr = (struct igrphdr *)bp;
  93         ip = (struct ip *)bp2;
  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 }