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1
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/*
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* Copyright (C) 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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9
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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11
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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30
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#include <sys/types.h>
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31
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#include <sys/socket.h>
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32
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33
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#include <netinet/in.h>
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34
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#include <netinet/ip6.h>
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35
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#include <arpa/inet.h>
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36
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37
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#include <netinet/udp.h>
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38
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39
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#include <stdio.h>
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40
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#include <string.h>
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41
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42
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#include "common.h"
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43
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44
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/* items outside of rfc2292bis */
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45
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#ifndef IP6OPT_MINLEN
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46
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#define IP6OPT_MINLEN 2
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47
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#endif
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48
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#ifndef IP6OPT_RTALERT_LEN
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49
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#define IP6OPT_RTALERT_LEN 4
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50
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#endif
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51
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#ifndef IP6OPT_JUMBO_LEN
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52
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#define IP6OPT_JUMBO_LEN 6
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53
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#endif
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54
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#define IP6OPT_HOMEADDR_MINLEN 18
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55
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#define IP6OPT_BU_MINLEN 10
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56
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#define IP6OPT_BA_MINLEN 13
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57
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#define IP6OPT_BR_MINLEN 2
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58
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#define IP6SOPT_UI 0x2
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59
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#define IP6SOPT_UI_MINLEN 4
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60
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#define IP6SOPT_ALTCOA 0x3
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61
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#define IP6SOPT_ALTCOA_MINLEN 18
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62
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#define IP6SOPT_AUTH 0x4
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63
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#define IP6SOPT_AUTH_MINLEN 6
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64
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65
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#define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */
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66
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#define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */
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67
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#define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */
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68
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#define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */
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69
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#define IP6OPT_EID 0x8a /* 10 0 01010 */
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70
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71
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#define IP6OPT_TYPE(o) ((o) & 0xC0)
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72
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#define IP6OPT_TYPE_SKIP 0x00
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73
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#define IP6OPT_TYPE_DISCARD 0x40
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74
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#define IP6OPT_TYPE_FORCEICMP 0x80
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75
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#define IP6OPT_TYPE_ICMP 0xC0
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76
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#define IP6OPT_MUTABLE 0x20
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78
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static void ip6_sopt_print(struct sbuf *, const u_char *, int);
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80
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81
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static void
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ip6_sopt_print(struct sbuf *sbuf, const u_char *bp, int len)
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83
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{
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char ip6addr[INET6_ADDRSTRLEN];
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85
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int i;
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86
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int optlen;
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87
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for (i = 0; i < len; i += optlen) {
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89
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if (bp[i] == IP6OPT_PAD1)
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90
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optlen = 1;
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91
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else {
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92
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if (i + 1 < len)
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optlen = bp[i + 1] + 2;
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else
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goto trunc;
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}
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if (i + optlen > len)
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goto trunc;
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99
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switch (bp[i]) {
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101
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case IP6OPT_PAD1:
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sbuf_printf(sbuf, "pad1 ");
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break;
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case IP6OPT_PADN:
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if (len - i < IP6OPT_MINLEN) {
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106
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sbuf_printf(sbuf, "padn=trunc ");
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107
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goto trunc;
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}
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109
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sbuf_printf(sbuf, "padn ");
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110
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break;
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111
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case IP6SOPT_UI:
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112
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if (len - i < IP6SOPT_UI_MINLEN) {
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113
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sbuf_printf(sbuf, "ui=trunc ");
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114
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goto trunc;
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115
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}
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sbuf_printf(sbuf, "ui=0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
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break;
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118
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case IP6SOPT_ALTCOA:
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119
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if (len - i < IP6SOPT_ALTCOA_MINLEN) {
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sbuf_printf(sbuf, "altcoa=trunc ");
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121
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goto trunc;
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}
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memset(ip6addr, 0, INET6_ADDRSTRLEN);
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124
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sbuf_printf(sbuf, "alt-CoA=%s ", inet_ntop(AF_INET6, &bp[i+2], ip6addr, INET6_ADDRSTRLEN));
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125
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break;
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126
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case IP6SOPT_AUTH:
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127
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if (len - i < IP6SOPT_AUTH_MINLEN) {
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128
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sbuf_printf(sbuf, "auth=trunc ");
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129
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goto trunc;
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130
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}
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131
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sbuf_printf(sbuf, "auth-spi=0x%08x ", EXTRACT_32BITS(&bp[i + 2]));
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132
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break;
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133
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default:
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134
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if (len - i < IP6OPT_MINLEN) {
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135
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sbuf_printf(sbuf, "sopt_type_trunc=%d)", bp[i]);
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136
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goto trunc;
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137
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}
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138
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sbuf_printf(sbuf, "sopt_type=0x%02x len=%d", bp[i], bp[i + 1]);
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139
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break;
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140
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}
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141
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}
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142
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return;
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143
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144
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trunc:
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145
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sbuf_printf(sbuf, "[trunc] ");
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146
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}
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147
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148
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void
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149
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ip6_opt_print(struct sbuf *sbuf, const u_char *bp, int len)
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150
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{
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151
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char ip6addr[INET6_ADDRSTRLEN];
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152
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int i;
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153
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int optlen = 0;
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154
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155
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if (len == 0)
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156
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return;
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157
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for (i = 0; i < len; i += optlen) {
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158
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if (bp[i] == IP6OPT_PAD1)
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159
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optlen = 1;
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160
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else {
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161
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if (i + 1 < len)
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162
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optlen = bp[i + 1] + 2;
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163
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else
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164
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goto trunc;
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165
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}
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166
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if (i + optlen > len)
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167
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goto trunc;
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168
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169
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switch (bp[i]) {
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170
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case IP6OPT_PAD1:
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171
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sbuf_printf(sbuf, "PAD1,");
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172
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break;
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173
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case IP6OPT_PADN:
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174
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if (len - i < IP6OPT_MINLEN) {
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175
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sbuf_printf(sbuf, "PADNTRUNC,");
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176
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goto trunc;
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177
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}
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178
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sbuf_printf(sbuf, "PADN,");
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179
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break;
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180
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case IP6OPT_ROUTER_ALERT:
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181
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if (len - i < IP6OPT_RTALERT_LEN) {
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182
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sbuf_printf(sbuf, "RTALERTTRUNC,");
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183
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goto trunc;
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184
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}
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185
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if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
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186
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sbuf_printf(sbuf, "RTALERTINVALID, %d,", bp[i + 1]);
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187
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goto trunc;
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188
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}
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189
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sbuf_printf(sbuf, "RTALERT,0x%04x,", EXTRACT_16BITS(&bp[i + 2]));
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190
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break;
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191
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case IP6OPT_JUMBO:
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192
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if (len - i < IP6OPT_JUMBO_LEN) {
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193
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sbuf_printf(sbuf, "JUMBOTRUNC,");
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194
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goto trunc;
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195
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}
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196
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if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
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197
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sbuf_printf(sbuf, "JUMBOINVALID,%d,", bp[i + 1]);
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198
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goto trunc;
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199
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}
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200
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sbuf_printf(sbuf, "JUMBO,%u,", EXTRACT_32BITS(&bp[i + 2]));
|
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201
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break;
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|
202
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case IP6OPT_HOME_ADDRESS:
|
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203
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if (len - i < IP6OPT_HOMEADDR_MINLEN) {
|
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204
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sbuf_printf(sbuf, "HOMEADDRTRUNC,");
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|
205
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goto trunc;
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|
206
|
}
|
|
207
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if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
|
|
208
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sbuf_printf(sbuf, "HOMEADDRINVALID, %d,", bp[i + 1]);
|
|
209
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goto trunc;
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|
210
|
}
|
|
211
|
memset(ip6addr, 0, INET6_ADDRSTRLEN);
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212
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sbuf_printf(sbuf, "HOMEADDR, %s,", inet_ntop(AF_INET6, &bp[i + 2], ip6addr, INET6_ADDRSTRLEN));
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|
213
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if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
|
|
214
|
ip6_sopt_print(sbuf, &bp[i + IP6OPT_HOMEADDR_MINLEN],
|
|
215
|
(optlen - IP6OPT_HOMEADDR_MINLEN));
|
|
216
|
}
|
|
217
|
break;
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|
218
|
case IP6OPT_BINDING_UPDATE:
|
|
219
|
if (len - i < IP6OPT_BU_MINLEN) {
|
|
220
|
sbuf_printf(sbuf, "BINDINGUPTRUNC,");
|
|
221
|
goto trunc;
|
|
222
|
}
|
|
223
|
if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) {
|
|
224
|
sbuf_printf(sbuf, "BINDINGUPINVALID,%d,", bp[i + 1]);
|
|
225
|
goto trunc;
|
|
226
|
}
|
|
227
|
sbuf_printf(sbuf, "BINDINGUP,");
|
|
228
|
if (bp[i + 2] & 0x80)
|
|
229
|
sbuf_printf(sbuf, "A");
|
|
230
|
if (bp[i + 2] & 0x40)
|
|
231
|
sbuf_printf(sbuf, "H");
|
|
232
|
if (bp[i + 2] & 0x20)
|
|
233
|
sbuf_printf(sbuf, "S");
|
|
234
|
if (bp[i + 2] & 0x10)
|
|
235
|
sbuf_printf(sbuf, "D");
|
|
236
|
if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4])
|
|
237
|
sbuf_printf(sbuf, "r");
|
|
238
|
sbuf_printf(sbuf, ",%u,", bp[i + 5]);
|
|
239
|
sbuf_printf(sbuf, "%u,", EXTRACT_32BITS(&bp[i + 6]));
|
|
240
|
|
|
241
|
if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
|
|
242
|
ip6_sopt_print(sbuf, &bp[i + IP6OPT_BU_MINLEN],
|
|
243
|
(optlen - IP6OPT_BU_MINLEN));
|
|
244
|
}
|
|
245
|
break;
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|
246
|
case IP6OPT_BINDING_ACK:
|
|
247
|
if (len - i < IP6OPT_BA_MINLEN) {
|
|
248
|
sbuf_printf(sbuf, "BINDINGACKTRUNC,");
|
|
249
|
goto trunc;
|
|
250
|
}
|
|
251
|
if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) {
|
|
252
|
sbuf_printf(sbuf, "BINDINGACKINVALID,%d,", bp[i + 1]);
|
|
253
|
goto trunc;
|
|
254
|
}
|
|
255
|
sbuf_printf(sbuf, "BINDINGACK,");
|
|
256
|
sbuf_printf(sbuf, "%u,", bp[i + 2]);
|
|
257
|
if (bp[i + 3])
|
|
258
|
sbuf_printf(sbuf, "res,");
|
|
259
|
else
|
|
260
|
sbuf_printf(sbuf, ",");
|
|
261
|
sbuf_printf(sbuf, "%u,", bp[i + 4]);
|
|
262
|
sbuf_printf(sbuf, "%u,", EXTRACT_32BITS(&bp[i + 5]));
|
|
263
|
sbuf_printf(sbuf, "%u,", EXTRACT_32BITS(&bp[i + 9]));
|
|
264
|
|
|
265
|
if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
|
|
266
|
ip6_sopt_print(sbuf, &bp[i + IP6OPT_BA_MINLEN],
|
|
267
|
(optlen - IP6OPT_BA_MINLEN));
|
|
268
|
}
|
|
269
|
break;
|
|
270
|
case IP6OPT_BINDING_REQ:
|
|
271
|
if (len - i < IP6OPT_BR_MINLEN) {
|
|
272
|
sbuf_printf(sbuf, "BINDINGREQTRUNC,");
|
|
273
|
goto trunc;
|
|
274
|
}
|
|
275
|
sbuf_printf(sbuf, "BINDINGREQ,");
|
|
276
|
if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) {
|
|
277
|
ip6_sopt_print(sbuf, &bp[i + IP6OPT_BR_MINLEN],
|
|
278
|
(optlen - IP6OPT_BR_MINLEN));
|
|
279
|
}
|
|
280
|
break;
|
|
281
|
default:
|
|
282
|
if (len - i < IP6OPT_MINLEN) {
|
|
283
|
sbuf_printf(sbuf, "TYPETRUNC,%d,", bp[i]);
|
|
284
|
goto trunc;
|
|
285
|
}
|
|
286
|
sbuf_printf(sbuf, "TYPE,0x%02x,%d,", bp[i], bp[i + 1]);
|
|
287
|
break;
|
|
288
|
}
|
|
289
|
}
|
|
290
|
|
|
291
|
trunc:
|
|
292
|
return;
|
|
293
|
}
|
|
294
|
|
|
295
|
int
|
|
296
|
hbhopt_print(struct sbuf *sbuf, register const u_char *bp)
|
|
297
|
{
|
|
298
|
const struct ip6_hbh *dp = (const struct ip6_hbh *)bp;
|
|
299
|
int hbhlen = 0;
|
|
300
|
|
|
301
|
hbhlen = (int)((dp->ip6h_len + 1) << 3);
|
|
302
|
sbuf_printf(sbuf, "HBH,");
|
|
303
|
ip6_opt_print(sbuf, (const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
|
|
304
|
|
|
305
|
return(hbhlen);
|
|
306
|
}
|
|
307
|
|
|
308
|
int
|
|
309
|
dstopt_print(struct sbuf *sbuf, register const u_char *bp)
|
|
310
|
{
|
|
311
|
const struct ip6_dest *dp = (const struct ip6_dest *)bp;
|
|
312
|
int dstoptlen = 0;
|
|
313
|
|
|
314
|
dstoptlen = (int)((dp->ip6d_len + 1) << 3);
|
|
315
|
sbuf_printf(sbuf, "DSTOPT,");
|
|
316
|
ip6_opt_print(sbuf, (const u_char *)dp + sizeof(*dp),
|
|
317
|
dstoptlen - sizeof(*dp));
|
|
318
|
|
|
319
|
return(dstoptlen);
|
|
320
|
}
|