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 /* \summary: IPv6 routing header printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <netdissect-stdinc.h> 29 30 #include <string.h> 31 32 #include "netdissect.h" 33 #include "addrtoname.h" 34 #include "extract.h" 35 36 #include "ip6.h" 37 38 int 39 rt6_print(netdissect_options *ndo, register const u_char *bp, const u_char *bp2 _U_) 40 { 41 register const struct ip6_rthdr *dp; 42 register const struct ip6_rthdr0 *dp0; 43 register const u_char *ep; 44 int i, len; 45 register const struct in6_addr *addr; 46 47 dp = (const struct ip6_rthdr *)bp; 48 49 /* 'ep' points to the end of available data. */ 50 ep = ndo->ndo_snapend; 51 52 ND_TCHECK(dp->ip6r_segleft); 53 54 len = dp->ip6r_len; 55 ND_PRINT((ndo, "srcrt (len=%d", dp->ip6r_len)); /*)*/ 56 ND_PRINT((ndo, ", type=%d", dp->ip6r_type)); 57 ND_PRINT((ndo, ", segleft=%d", dp->ip6r_segleft)); 58 59 switch (dp->ip6r_type) { 60 case IPV6_RTHDR_TYPE_0: 61 case IPV6_RTHDR_TYPE_2: /* Mobile IPv6 ID-20 */ 62 dp0 = (const struct ip6_rthdr0 *)dp; 63 64 ND_TCHECK(dp0->ip6r0_reserved); 65 if (EXTRACT_32BITS(dp0->ip6r0_reserved) || ndo->ndo_vflag) { 66 ND_PRINT((ndo, ", rsv=0x%0x", 67 EXTRACT_32BITS(&dp0->ip6r0_reserved))); 68 } 69 70 if (len % 2 == 1) 71 goto trunc; 72 len >>= 1; 73 addr = &dp0->ip6r0_addr[0]; 74 for (i = 0; i < len; i++) { 75 if ((const u_char *)(addr + 1) > ep) 76 goto trunc; 77 78 ND_PRINT((ndo, ", [%d]%s", i, ip6addr_string(ndo, addr))); 79 addr++; 80 } 81 /*(*/ 82 ND_PRINT((ndo, ") ")); 83 return((dp0->ip6r0_len + 1) << 3); 84 break; 85 default: 86 goto trunc; 87 break; 88 } 89 90 trunc: 91 ND_PRINT((ndo, "[|srcrt]")); 92 return -1; 93 } 94
