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      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 (at) inria.fr)
     22  */
     23 
     24 #ifndef lint
     25 static const char rcsid[] _U_ =
     26     "@(#) $Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.21 2005-04-20 21:01:56 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 const 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, const u_char *bp2 _U_)
     81 {
     82 	register struct igrphdr *hdr;
     83 	register u_char *cp;
     84 	u_int nint, nsys, next;
     85 
     86 	hdr = (struct igrphdr *)bp;
     87 	cp = (u_char *)(hdr + 1);
     88         (void)printf("igrp:");
     89 
     90 	/* Header */
     91 	TCHECK(*hdr);
     92 	nint = EXTRACT_16BITS(&hdr->ig_ni);
     93 	nsys = EXTRACT_16BITS(&hdr->ig_ns);
     94 	next = EXTRACT_16BITS(&hdr->ig_nx);
     95 
     96 	(void)printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
     97 	    tok2str(op2str, "op-#%d", IGRP_OP(hdr->ig_vop)),
     98 	    IGRP_V(hdr->ig_vop),
     99 	    hdr->ig_ed,
    100 	    EXTRACT_16BITS(&hdr->ig_as),
    101 	    nint,
    102 	    nsys,
    103 	    next);
    104 
    105 	length -= sizeof(*hdr);
    106 	while (length >= IGRP_RTE_SIZE) {
    107 		if (nint > 0) {
    108 			TCHECK2(*cp, IGRP_RTE_SIZE);
    109 			igrp_entry_print((struct igrprte *)cp, 1, 0);
    110 			--nint;
    111 		} else if (nsys > 0) {
    112 			TCHECK2(*cp, IGRP_RTE_SIZE);
    113 			igrp_entry_print((struct igrprte *)cp, 0, 0);
    114 			--nsys;
    115 		} else if (next > 0) {
    116 			TCHECK2(*cp, IGRP_RTE_SIZE);
    117 			igrp_entry_print((struct igrprte *)cp, 0, 1);
    118 			--next;
    119 		} else {
    120 			(void)printf(" [extra bytes %d]", length);
    121 			break;
    122 		}
    123 		cp += IGRP_RTE_SIZE;
    124 		length -= IGRP_RTE_SIZE;
    125 	}
    126 	if (nint == 0 && nsys == 0 && next == 0)
    127 		return;
    128 trunc:
    129 	fputs(" [|igrp]", stdout);
    130 }
    131