1 /* $OpenBSD: print-ip6opts.c,v 1.5 2015/11/16 00:16:39 mmcc 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/time.h> 34 #include <sys/types.h> 35 #include <sys/socket.h> 36 37 #include <netinet/in.h> 38 #include <netinet/ip6.h> 39 40 #include <stdio.h> 41 42 #include "interface.h" 43 #include "addrtoname.h" 44 45 void 46 ip6_opt_print(const u_char *bp, int len) 47 { 48 int i; 49 int optlen; 50 51 for (i = 0; i < len; i += optlen) { 52 switch (bp[i]) { 53 case IP6OPT_PAD1: 54 optlen = 1; 55 break; 56 case IP6OPT_PADN: 57 if (len - i < IP6OPT_MINLEN) { 58 printf("(padn: trunc)"); 59 goto trunc; 60 } 61 optlen = bp[i + 1] + 2; 62 break; 63 case IP6OPT_ROUTER_ALERT: 64 if (len - i < IP6OPT_RTALERT_LEN) { 65 printf("(rtalert: trunc)"); 66 goto trunc; 67 } 68 if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) { 69 printf("(rtalert: invalid len %d)", bp[i + 1]); 70 goto trunc; 71 } 72 printf("(rtalert: 0x%04x) ", ntohs(*(u_short *)&bp[i + 2])); 73 optlen = IP6OPT_RTALERT_LEN; 74 break; 75 case IP6OPT_JUMBO: 76 if (len - i < IP6OPT_JUMBO_LEN) { 77 printf("(jumbo: trunc)"); 78 goto trunc; 79 } 80 if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) { 81 printf("(jumbo: invalid len %d)", bp[i + 1]); 82 goto trunc; 83 } 84 printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2])); 85 optlen = IP6OPT_JUMBO_LEN; 86 break; 87 default: 88 if (len - i < IP6OPT_MINLEN) { 89 printf("(type %d: trunc)", bp[i]); 90 goto trunc; 91 } 92 printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]); 93 optlen = bp[i + 1] + 2; 94 break; 95 } 96 } 97 98 #if 0 99 end: 100 #endif 101 return; 102 103 trunc: 104 printf("[trunc] "); 105 } 106 107 int 108 hbhopt_print(const u_char *bp) 109 { 110 const struct ip6_hbh *dp = (struct ip6_hbh *)bp; 111 const u_char *ep; 112 int hbhlen = 0; 113 114 /* 'ep' points to the end of avaible data. */ 115 ep = snapend; 116 TCHECK(dp->ip6h_len); 117 hbhlen = (int)((dp->ip6h_len + 1) << 3); 118 TCHECK2(*dp, hbhlen); 119 printf("HBH "); 120 if (vflag) 121 ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp)); 122 123 return(hbhlen); 124 125 trunc: 126 fputs("[|HBH]", stdout); 127 return(hbhlen); 128 } 129 130 int 131 dstopt_print(const u_char *bp) 132 { 133 const struct ip6_dest *dp = (struct ip6_dest *)bp; 134 const u_char *ep; 135 int dstoptlen = 0; 136 137 /* 'ep' points to the end of avaible data. */ 138 ep = snapend; 139 TCHECK(dp->ip6d_len); 140 dstoptlen = (int)((dp->ip6d_len + 1) << 3); 141 TCHECK2(*dp, dstoptlen); 142 printf("DSTOPT "); 143 if (vflag) { 144 ip6_opt_print((const u_char *)dp + sizeof(*dp), 145 dstoptlen - sizeof(*dp)); 146 } 147 148 return(dstoptlen); 149 150 trunc: 151 fputs("[|DSTOPT]", stdout); 152 return(dstoptlen); 153 } 154 #endif /* INET6 */ 155