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 1.20.2.1 2005/04/20 21:02:15 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, 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