1 /* 2 * Copyright (c) 1988, 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-rt6.c,v 1.23.2.3 2003/11/19 00:35:45 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 35 #include <stdio.h> 36 37 #include "ip6.h" 38 39 #include "interface.h" 40 #include "addrtoname.h" 41 #include "extract.h" 42 43 int 44 rt6_print(register const u_char *bp, register const u_char *bp2) 45 { 46 register const struct ip6_rthdr *dp; 47 register const struct ip6_rthdr0 *dp0; 48 register const struct ip6_hdr *ip; 49 register const u_char *ep; 50 int i, len; 51 register const struct in6_addr *addr; 52 53 dp = (struct ip6_rthdr *)bp; 54 ip = (struct ip6_hdr *)bp2; 55 len = dp->ip6r_len; 56 57 /* 'ep' points to the end of available data. */ 58 ep = snapend; 59 60 TCHECK(dp->ip6r_segleft); 61 62 printf("srcrt (len=%d", dp->ip6r_len); /*)*/ 63 printf(", type=%d", dp->ip6r_type); 64 printf(", segleft=%d", dp->ip6r_segleft); 65 66 switch (dp->ip6r_type) { 67 #ifndef IPV6_RTHDR_TYPE_0 68 #define IPV6_RTHDR_TYPE_0 0 69 #endif 70 #ifndef IPV6_RTHDR_TYPE_2 71 #define IPV6_RTHDR_TYPE_2 2 72 #endif 73 case IPV6_RTHDR_TYPE_0: 74 case IPV6_RTHDR_TYPE_2: /* Mobile IPv6 ID-20 */ 75 dp0 = (struct ip6_rthdr0 *)dp; 76 77 TCHECK(dp0->ip6r0_reserved); 78 if (dp0->ip6r0_reserved || vflag) { 79 printf(", rsv=0x%0x", 80 EXTRACT_32BITS(&dp0->ip6r0_reserved)); 81 } 82 83 if (len % 2 == 1) 84 goto trunc; 85 len >>= 1; 86 addr = &dp0->ip6r0_addr[0]; 87 for (i = 0; i < len; i++) { 88 if ((u_char *)(addr + 1) > ep) 89 goto trunc; 90 91 printf(", [%d]%s", i, ip6addr_string(addr)); 92 addr++; 93 } 94 /*(*/ 95 printf(") "); 96 return((dp0->ip6r0_len + 1) << 3); 97 break; 98 default: 99 goto trunc; 100 break; 101 } 102 103 trunc: 104 fputs("[|srcrt]", stdout); 105 return -1; 106 } 107 #endif /* INET6 */ 108