1 /* $OpenBSD: print-ip6opts.c,v 1.3 2006/12/09 01:12:28 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifdef INET6 33 #include <sys/param.h> 34 #include <sys/time.h> 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 38 #include <netinet/in.h> 39 #include <netinet/ip6.h> 40 41 #include <stdio.h> 42 43 #include "interface.h" 44 #include "addrtoname.h" 45 46 void 47 ip6_opt_print(const u_char *bp, int len) 48 { 49 int i; 50 int optlen; 51 52 for (i = 0; i < len; i += optlen) { 53 switch (bp[i]) { 54 case IP6OPT_PAD1: 55 optlen = 1; 56 break; 57 case IP6OPT_PADN: 58 if (len - i < IP6OPT_MINLEN) { 59 printf("(padn: trunc)"); 60 goto trunc; 61 } 62 optlen = bp[i + 1] + 2; 63 break; 64 case IP6OPT_ROUTER_ALERT: 65 if (len - i < IP6OPT_RTALERT_LEN) { 66 printf("(rtalert: trunc)"); 67 goto trunc; 68 } 69 if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) { 70 printf("(rtalert: invalid len %d)", bp[i + 1]); 71 goto trunc; 72 } 73 printf("(rtalert: 0x%04x) ", ntohs(*(u_short *)&bp[i + 2])); 74 optlen = IP6OPT_RTALERT_LEN; 75 break; 76 case IP6OPT_JUMBO: 77 if (len - i < IP6OPT_JUMBO_LEN) { 78 printf("(jumbo: trunc)"); 79 goto trunc; 80 } 81 if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) { 82 printf("(jumbo: invalid len %d)", bp[i + 1]); 83 goto trunc; 84 } 85 printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2])); 86 optlen = IP6OPT_JUMBO_LEN; 87 break; 88 default: 89 if (len - i < IP6OPT_MINLEN) { 90 printf("(type %d: trunc)", bp[i]); 91 goto trunc; 92 } 93 printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]); 94 optlen = bp[i + 1] + 2; 95 break; 96 } 97 } 98 99 #if 0 100 end: 101 #endif 102 return; 103 104 trunc: 105 printf("[trunc] "); 106 } 107 108 int 109 hbhopt_print(register const u_char *bp) 110 { 111 const struct ip6_hbh *dp = (struct ip6_hbh *)bp; 112 register const u_char *ep; 113 int hbhlen = 0; 114 115 /* 'ep' points to the end of avaible data. */ 116 ep = snapend; 117 TCHECK(dp->ip6h_len); 118 hbhlen = (int)((dp->ip6h_len + 1) << 3); 119 TCHECK2(*dp, hbhlen); 120 printf("HBH "); 121 if (vflag) 122 ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp)); 123 124 return(hbhlen); 125 126 trunc: 127 fputs("[|HBH]", stdout); 128 return(hbhlen); 129 } 130 131 int 132 dstopt_print(register const u_char *bp) 133 { 134 const struct ip6_dest *dp = (struct ip6_dest *)bp; 135 register const u_char *ep; 136 int dstoptlen = 0; 137 138 /* 'ep' points to the end of avaible data. */ 139 ep = snapend; 140 TCHECK(dp->ip6d_len); 141 dstoptlen = (int)((dp->ip6d_len + 1) << 3); 142 TCHECK2(*dp, dstoptlen); 143 printf("DSTOPT "); 144 if (vflag) { 145 ip6_opt_print((const u_char *)dp + sizeof(*dp), 146 dstoptlen - sizeof(*dp)); 147 } 148 149 return(dstoptlen); 150 151 trunc: 152 fputs("[|DSTOPT]", stdout); 153 return(dstoptlen); 154 } 155 #endif /* INET6 */ 156