1 /* 2 * Copyright (C) 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifdef HAVE_CONFIG_H 31 #include "config.h" 32 #endif 33 34 #ifndef lint 35 static const char rcsid[] = 36 "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.2.2.1 2000/01/11 06:58:25 fenner Exp $"; 37 #endif 38 39 #ifdef INET6 40 #include <sys/param.h> 41 #include <sys/time.h> 42 #include <sys/types.h> 43 #include <sys/socket.h> 44 45 #include <netinet/in.h> 46 #include <netinet/ip6.h> 47 48 #include <stdio.h> 49 50 #include "interface.h" 51 #include "addrtoname.h" 52 53 void 54 ip6_opt_print(const u_char *bp, int len) 55 { 56 int i; 57 int optlen; 58 59 for (i = 0; i < len; i += optlen) { 60 switch (bp[i]) { 61 case IP6OPT_PAD1: 62 optlen = 1; 63 break; 64 case IP6OPT_PADN: 65 if (len - i < IP6OPT_MINLEN) { 66 printf("(padn: trunc)"); 67 goto trunc; 68 } 69 optlen = bp[i + 1] + 2; 70 break; 71 case IP6OPT_RTALERT: 72 if (len - i < IP6OPT_RTALERT_LEN) { 73 printf("(rtalert: trunc)"); 74 goto trunc; 75 } 76 if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) { 77 printf("(rtalert: invalid len %d)", bp[i + 1]); 78 goto trunc; 79 } 80 printf("(rtalert: 0x%04x) ", ntohs(*(u_short *)&bp[i + 2])); 81 optlen = IP6OPT_RTALERT_LEN; 82 break; 83 case IP6OPT_JUMBO: 84 if (len - i < IP6OPT_JUMBO_LEN) { 85 printf("(jumbo: trunc)"); 86 goto trunc; 87 } 88 if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) { 89 printf("(jumbo: invalid len %d)", bp[i + 1]); 90 goto trunc; 91 } 92 printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2])); 93 optlen = IP6OPT_JUMBO_LEN; 94 break; 95 default: 96 if (len - i < IP6OPT_MINLEN) { 97 printf("(type %d: trunc)", bp[i]); 98 goto trunc; 99 } 100 printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]); 101 optlen = bp[i + 1] + 2; 102 break; 103 } 104 } 105 106 #if 0 107 end: 108 #endif 109 return; 110 111 trunc: 112 printf("[trunc] "); 113 } 114 115 int 116 hbhopt_print(register const u_char *bp) 117 { 118 const struct ip6_hbh *dp = (struct ip6_hbh *)bp; 119 register const u_char *ep; 120 int hbhlen = 0; 121 122 /* 'ep' points to the end of avaible data. */ 123 ep = snapend; 124 TCHECK(dp->ip6h_len); 125 hbhlen = (int)((dp->ip6h_len + 1) << 3); 126 TCHECK2(dp, hbhlen); 127 printf("HBH "); 128 if (vflag) 129 ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp)); 130 131 return(hbhlen); 132 133 trunc: 134 fputs("[|HBH]", stdout); 135 return(hbhlen); 136 } 137 138 int 139 dstopt_print(register const u_char *bp) 140 { 141 const struct ip6_dest *dp = (struct ip6_dest *)bp; 142 register const u_char *ep; 143 int dstoptlen = 0; 144 145 /* 'ep' points to the end of avaible data. */ 146 ep = snapend; 147 TCHECK(dp->ip6d_len); 148 dstoptlen = (int)((dp->ip6d_len + 1) << 3); 149 TCHECK2(dp, dstoptlen); 150 printf("DSTOPT "); 151 if (vflag) { 152 ip6_opt_print((const u_char *)dp + sizeof(*dp), 153 dstoptlen - sizeof(*dp)); 154 } 155 156 return(dstoptlen); 157 158 trunc: 159 fputs("[|DSTOPT]", stdout); 160 return(dstoptlen); 161 } 162 #endif /* INET6 */ 163