1 /* 2 * Copyright (c) 1989, 1990, 1991, 1993, 1994 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 22 #ifndef lint 23 static const char rcsid[] _U_ = 24 "@(#) $Header: /tcpdump/master/tcpdump/print-ripng.c,v 1.18 2005/01/04 00:15:54 guy Exp $"; 25 #endif 26 27 #ifdef HAVE_CONFIG_H 28 #include "config.h" 29 #endif 30 31 #ifdef INET6 32 33 #include <tcpdump-stdinc.h> 34 #include <stdio.h> 35 36 #include "route6d.h" 37 #include "interface.h" 38 #include "addrtoname.h" 39 #include "extract.h" 40 41 #if !defined(IN6_IS_ADDR_UNSPECIFIED) && !defined(_MSC_VER) /* MSVC inline */ 42 static int IN6_IS_ADDR_UNSPECIFIED(const struct in6_addr *addr) 43 { 44 static const struct in6_addr in6addr_any; /* :: */ 45 return (memcmp(addr, &in6addr_any, sizeof(*addr)) == 0); 46 } 47 #endif 48 49 static int 50 rip6_entry_print(register const struct netinfo6 *ni, int metric) 51 { 52 int l; 53 l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen); 54 if (ni->rip6_tag) 55 l += printf(" [%d]", EXTRACT_16BITS(&ni->rip6_tag)); 56 if (metric) 57 l += printf(" (%d)", ni->rip6_metric); 58 return l; 59 } 60 61 void 62 ripng_print(const u_char *dat, unsigned int length) 63 { 64 register const struct rip6 *rp = (struct rip6 *)dat; 65 register const struct netinfo6 *ni; 66 register u_int amt; 67 register u_int i; 68 int j; 69 int trunc; 70 71 if (snapend < dat) 72 return; 73 amt = snapend - dat; 74 i = min(length, amt); 75 if (i < (sizeof(struct rip6) - sizeof(struct netinfo6))) 76 return; 77 i -= (sizeof(struct rip6) - sizeof(struct netinfo6)); 78 79 switch (rp->rip6_cmd) { 80 81 case RIP6_REQUEST: 82 j = length / sizeof(*ni); 83 if (j == 1 84 && rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6 85 && IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) { 86 printf(" ripng-req dump"); 87 break; 88 } 89 if (j * sizeof(*ni) != length - 4) 90 printf(" ripng-req %d[%u]:", j, length); 91 else 92 printf(" ripng-req %d:", j); 93 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); 94 for (ni = rp->rip6_nets; i >= sizeof(*ni); 95 i -= sizeof(*ni), ++ni) { 96 if (vflag > 1) 97 printf("\n\t"); 98 else 99 printf(" "); 100 rip6_entry_print(ni, 0); 101 } 102 break; 103 case RIP6_RESPONSE: 104 j = length / sizeof(*ni); 105 if (j * sizeof(*ni) != length - 4) 106 printf(" ripng-resp %d[%u]:", j, length); 107 else 108 printf(" ripng-resp %d:", j); 109 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); 110 for (ni = rp->rip6_nets; i >= sizeof(*ni); 111 i -= sizeof(*ni), ++ni) { 112 if (vflag > 1) 113 printf("\n\t"); 114 else 115 printf(" "); 116 rip6_entry_print(ni, ni->rip6_metric); 117 } 118 if (trunc) 119 printf("[|ripng]"); 120 break; 121 default: 122 printf(" ripng-%d ?? %u", rp->rip6_cmd, length); 123 break; 124 } 125 if (rp->rip6_vers != RIP6_VERSION) 126 printf(" [vers %d]", rp->rip6_vers); 127 } 128 #endif /* INET6 */ 129