1 | #include <machine/rtems-bsd-user-space.h> |
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2 | |
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3 | /* |
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4 | * Copyright (C) 2001 WIDE Project. |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * 3. Neither the name of the project nor the names of its contributors |
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16 | * may be used to endorse or promote products derived from this software |
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17 | * without specific prior written permission. |
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18 | * |
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19 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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29 | * SUCH DAMAGE. |
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30 | */ |
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31 | |
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32 | #ifndef lint |
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33 | static const char rcsid[] _U_ = |
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34 | "@(#) $Header: /tcpdump/master/tcpdump/print-lwres.c,v 1.13 2004-03-24 01:54:29 guy Exp $ (LBL)"; |
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35 | #endif |
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36 | |
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37 | #ifdef HAVE_CONFIG_H |
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38 | #include "config.h" |
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39 | #endif |
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40 | |
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41 | #include <tcpdump-stdinc.h> |
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42 | |
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43 | #include "nameser.h" |
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44 | |
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45 | #include <stdio.h> |
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46 | #include <string.h> |
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47 | |
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48 | #include "interface.h" |
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49 | #include "addrtoname.h" |
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50 | #include "extract.h" /* must come after interface.h */ |
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51 | |
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52 | /* BIND9 lib/lwres/include/lwres */ |
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53 | typedef u_int32_t lwres_uint32_t; |
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54 | typedef u_int16_t lwres_uint16_t; |
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55 | typedef u_int8_t lwres_uint8_t; |
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56 | |
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57 | struct lwres_lwpacket { |
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58 | lwres_uint32_t length; |
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59 | lwres_uint16_t version; |
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60 | lwres_uint16_t pktflags; |
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61 | lwres_uint32_t serial; |
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62 | lwres_uint32_t opcode; |
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63 | lwres_uint32_t result; |
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64 | lwres_uint32_t recvlength; |
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65 | lwres_uint16_t authtype; |
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66 | lwres_uint16_t authlength; |
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67 | }; |
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68 | |
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69 | #define LWRES_LWPACKETFLAG_RESPONSE 0x0001U /* if set, pkt is a response */ |
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70 | |
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71 | #define LWRES_LWPACKETVERSION_0 0 |
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72 | |
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73 | #define LWRES_FLAG_TRUSTNOTREQUIRED 0x00000001U |
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74 | #define LWRES_FLAG_SECUREDATA 0x00000002U |
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75 | |
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76 | /* |
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77 | * no-op |
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78 | */ |
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79 | #define LWRES_OPCODE_NOOP 0x00000000U |
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80 | |
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81 | typedef struct { |
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82 | /* public */ |
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83 | lwres_uint16_t datalength; |
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84 | /* data follows */ |
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85 | } lwres_nooprequest_t; |
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86 | |
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87 | typedef struct { |
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88 | /* public */ |
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89 | lwres_uint16_t datalength; |
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90 | /* data follows */ |
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91 | } lwres_noopresponse_t; |
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92 | |
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93 | /* |
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94 | * get addresses by name |
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95 | */ |
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96 | #define LWRES_OPCODE_GETADDRSBYNAME 0x00010001U |
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97 | |
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98 | typedef struct lwres_addr lwres_addr_t; |
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99 | |
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100 | struct lwres_addr { |
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101 | lwres_uint32_t family; |
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102 | lwres_uint16_t length; |
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103 | /* address folows */ |
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104 | }; |
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105 | |
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106 | typedef struct { |
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107 | /* public */ |
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108 | lwres_uint32_t flags; |
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109 | lwres_uint32_t addrtypes; |
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110 | lwres_uint16_t namelen; |
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111 | /* name follows */ |
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112 | } lwres_gabnrequest_t; |
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113 | |
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114 | typedef struct { |
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115 | /* public */ |
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116 | lwres_uint32_t flags; |
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117 | lwres_uint16_t naliases; |
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118 | lwres_uint16_t naddrs; |
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119 | lwres_uint16_t realnamelen; |
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120 | /* aliases follows */ |
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121 | /* addrs follows */ |
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122 | /* realname follows */ |
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123 | } lwres_gabnresponse_t; |
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124 | |
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125 | /* |
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126 | * get name by address |
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127 | */ |
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128 | #define LWRES_OPCODE_GETNAMEBYADDR 0x00010002U |
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129 | typedef struct { |
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130 | /* public */ |
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131 | lwres_uint32_t flags; |
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132 | lwres_addr_t addr; |
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133 | /* addr body follows */ |
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134 | } lwres_gnbarequest_t; |
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135 | |
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136 | typedef struct { |
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137 | /* public */ |
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138 | lwres_uint32_t flags; |
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139 | lwres_uint16_t naliases; |
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140 | lwres_uint16_t realnamelen; |
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141 | /* aliases follows */ |
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142 | /* realname follows */ |
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143 | } lwres_gnbaresponse_t; |
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144 | |
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145 | /* |
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146 | * get rdata by name |
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147 | */ |
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148 | #define LWRES_OPCODE_GETRDATABYNAME 0x00010003U |
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149 | |
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150 | typedef struct { |
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151 | /* public */ |
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152 | lwres_uint32_t flags; |
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153 | lwres_uint16_t rdclass; |
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154 | lwres_uint16_t rdtype; |
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155 | lwres_uint16_t namelen; |
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156 | /* name follows */ |
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157 | } lwres_grbnrequest_t; |
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158 | |
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159 | typedef struct { |
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160 | /* public */ |
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161 | lwres_uint32_t flags; |
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162 | lwres_uint16_t rdclass; |
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163 | lwres_uint16_t rdtype; |
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164 | lwres_uint32_t ttl; |
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165 | lwres_uint16_t nrdatas; |
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166 | lwres_uint16_t nsigs; |
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167 | /* realname here (len + name) */ |
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168 | /* rdata here (len + name) */ |
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169 | /* signatures here (len + name) */ |
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170 | } lwres_grbnresponse_t; |
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171 | |
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172 | #define LWRDATA_VALIDATED 0x00000001 |
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173 | |
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174 | #define LWRES_ADDRTYPE_V4 0x00000001U /* ipv4 */ |
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175 | #define LWRES_ADDRTYPE_V6 0x00000002U /* ipv6 */ |
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176 | |
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177 | #define LWRES_MAX_ALIASES 16 /* max # of aliases */ |
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178 | #define LWRES_MAX_ADDRS 64 /* max # of addrs */ |
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179 | |
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180 | struct tok opcode[] = { |
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181 | { LWRES_OPCODE_NOOP, "noop", }, |
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182 | { LWRES_OPCODE_GETADDRSBYNAME, "getaddrsbyname", }, |
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183 | { LWRES_OPCODE_GETNAMEBYADDR, "getnamebyaddr", }, |
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184 | { LWRES_OPCODE_GETRDATABYNAME, "getrdatabyname", }, |
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185 | { 0, NULL, }, |
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186 | }; |
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187 | |
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188 | /* print-domain.c */ |
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189 | extern struct tok ns_type2str[]; |
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190 | extern struct tok ns_class2str[]; |
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191 | |
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192 | static int lwres_printname(size_t, const char *); |
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193 | static int lwres_printnamelen(const char *); |
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194 | static int lwres_printbinlen(const char *); |
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195 | static int lwres_printaddr(lwres_addr_t *); |
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196 | |
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197 | static int |
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198 | lwres_printname(size_t l, const char *p0) |
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199 | { |
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200 | const char *p; |
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201 | size_t i; |
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202 | |
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203 | p = p0; |
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204 | /* + 1 for terminating \0 */ |
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205 | if (p + l + 1 > (const char *)snapend) |
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206 | goto trunc; |
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207 | |
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208 | printf(" "); |
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209 | for (i = 0; i < l; i++) |
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210 | safeputchar(*p++); |
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211 | p++; /* skip terminating \0 */ |
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212 | |
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213 | return p - p0; |
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214 | |
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215 | trunc: |
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216 | return -1; |
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217 | } |
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218 | |
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219 | static int |
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220 | lwres_printnamelen(const char *p) |
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221 | { |
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222 | u_int16_t l; |
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223 | int advance; |
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224 | |
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225 | if (p + 2 > (const char *)snapend) |
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226 | goto trunc; |
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227 | l = EXTRACT_16BITS(p); |
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228 | advance = lwres_printname(l, p + 2); |
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229 | if (advance < 0) |
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230 | goto trunc; |
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231 | return 2 + advance; |
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232 | |
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233 | trunc: |
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234 | return -1; |
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235 | } |
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236 | |
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237 | static int |
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238 | lwres_printbinlen(const char *p0) |
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239 | { |
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240 | const char *p; |
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241 | u_int16_t l; |
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242 | int i; |
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243 | |
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244 | p = p0; |
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245 | if (p + 2 > (const char *)snapend) |
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246 | goto trunc; |
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247 | l = EXTRACT_16BITS(p); |
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248 | if (p + 2 + l > (const char *)snapend) |
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249 | goto trunc; |
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250 | p += 2; |
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251 | for (i = 0; i < l; i++) |
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252 | printf("%02x", *p++); |
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253 | return p - p0; |
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254 | |
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255 | trunc: |
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256 | return -1; |
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257 | } |
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258 | |
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259 | static int |
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260 | lwres_printaddr(lwres_addr_t *ap) |
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261 | { |
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262 | u_int16_t l; |
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263 | const char *p; |
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264 | int i; |
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265 | |
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266 | TCHECK(ap->length); |
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267 | l = EXTRACT_16BITS(&ap->length); |
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268 | /* XXX ap points to packed struct */ |
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269 | p = (const char *)&ap->length + sizeof(ap->length); |
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270 | TCHECK2(*p, l); |
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271 | |
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272 | switch (EXTRACT_32BITS(&ap->family)) { |
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273 | case 1: /* IPv4 */ |
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274 | if (l < 4) |
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275 | return -1; |
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276 | printf(" %s", ipaddr_string(p)); |
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277 | p += sizeof(struct in_addr); |
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278 | break; |
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279 | #ifdef INET6 |
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280 | case 2: /* IPv6 */ |
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281 | if (l < 16) |
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282 | return -1; |
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283 | printf(" %s", ip6addr_string(p)); |
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284 | p += sizeof(struct in6_addr); |
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285 | break; |
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286 | #endif |
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287 | default: |
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288 | printf(" %u/", EXTRACT_32BITS(&ap->family)); |
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289 | for (i = 0; i < l; i++) |
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290 | printf("%02x", *p++); |
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291 | } |
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292 | |
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293 | return p - (const char *)ap; |
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294 | |
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295 | trunc: |
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296 | return -1; |
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297 | } |
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298 | |
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299 | void |
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300 | lwres_print(register const u_char *bp, u_int length) |
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301 | { |
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302 | const struct lwres_lwpacket *np; |
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303 | u_int32_t v; |
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304 | const char *s; |
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305 | int response; |
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306 | int advance; |
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307 | int unsupported = 0; |
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308 | |
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309 | np = (const struct lwres_lwpacket *)bp; |
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310 | TCHECK(np->authlength); |
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311 | |
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312 | printf(" lwres"); |
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313 | v = EXTRACT_16BITS(&np->version); |
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314 | if (vflag || v != LWRES_LWPACKETVERSION_0) |
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315 | printf(" v%u", v); |
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316 | if (v != LWRES_LWPACKETVERSION_0) { |
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317 | s = (const char *)np + EXTRACT_32BITS(&np->length); |
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318 | goto tail; |
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319 | } |
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320 | |
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321 | response = EXTRACT_16BITS(&np->pktflags) & LWRES_LWPACKETFLAG_RESPONSE; |
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322 | |
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323 | /* opcode and pktflags */ |
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324 | v = EXTRACT_32BITS(&np->opcode); |
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325 | s = tok2str(opcode, "#0x%x", v); |
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326 | printf(" %s%s", s, response ? "" : "?"); |
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327 | |
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328 | /* pktflags */ |
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329 | v = EXTRACT_16BITS(&np->pktflags); |
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330 | if (v & ~LWRES_LWPACKETFLAG_RESPONSE) |
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331 | printf("[0x%x]", v); |
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332 | |
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333 | if (vflag > 1) { |
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334 | printf(" ("); /*)*/ |
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335 | printf("serial:0x%x", EXTRACT_32BITS(&np->serial)); |
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336 | printf(" result:0x%x", EXTRACT_32BITS(&np->result)); |
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337 | printf(" recvlen:%u", EXTRACT_32BITS(&np->recvlength)); |
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338 | /* BIND910: not used */ |
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339 | if (vflag > 2) { |
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340 | printf(" authtype:0x%x", EXTRACT_16BITS(&np->authtype)); |
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341 | printf(" authlen:%u", EXTRACT_16BITS(&np->authlength)); |
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342 | } |
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343 | /*(*/ |
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344 | printf(")"); |
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345 | } |
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346 | |
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347 | /* per-opcode content */ |
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348 | if (!response) { |
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349 | /* |
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350 | * queries |
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351 | */ |
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352 | lwres_gabnrequest_t *gabn; |
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353 | lwres_gnbarequest_t *gnba; |
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354 | lwres_grbnrequest_t *grbn; |
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355 | u_int32_t l; |
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356 | |
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357 | gabn = NULL; |
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358 | gnba = NULL; |
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359 | grbn = NULL; |
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360 | |
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361 | switch (EXTRACT_32BITS(&np->opcode)) { |
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362 | case LWRES_OPCODE_NOOP: |
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363 | break; |
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364 | case LWRES_OPCODE_GETADDRSBYNAME: |
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365 | gabn = (lwres_gabnrequest_t *)(np + 1); |
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366 | TCHECK(gabn->namelen); |
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367 | /* XXX gabn points to packed struct */ |
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368 | s = (const char *)&gabn->namelen + |
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369 | sizeof(gabn->namelen); |
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370 | l = EXTRACT_16BITS(&gabn->namelen); |
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371 | |
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372 | /* BIND910: not used */ |
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373 | if (vflag > 2) { |
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374 | printf(" flags:0x%x", |
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375 | EXTRACT_32BITS(&gabn->flags)); |
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376 | } |
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377 | |
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378 | v = EXTRACT_32BITS(&gabn->addrtypes); |
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379 | switch (v & (LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6)) { |
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380 | case LWRES_ADDRTYPE_V4: |
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381 | printf(" IPv4"); |
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382 | break; |
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383 | case LWRES_ADDRTYPE_V6: |
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384 | printf(" IPv6"); |
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385 | break; |
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386 | case LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6: |
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387 | printf(" IPv4/6"); |
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388 | break; |
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389 | } |
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390 | if (v & ~(LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6)) |
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391 | printf("[0x%x]", v); |
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392 | |
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393 | advance = lwres_printname(l, s); |
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394 | if (advance < 0) |
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395 | goto trunc; |
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396 | s += advance; |
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397 | break; |
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398 | case LWRES_OPCODE_GETNAMEBYADDR: |
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399 | gnba = (lwres_gnbarequest_t *)(np + 1); |
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400 | TCHECK(gnba->addr); |
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401 | |
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402 | /* BIND910: not used */ |
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403 | if (vflag > 2) { |
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404 | printf(" flags:0x%x", |
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405 | EXTRACT_32BITS(&gnba->flags)); |
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406 | } |
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407 | |
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408 | s = (const char *)&gnba->addr; |
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409 | |
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410 | advance = lwres_printaddr(&gnba->addr); |
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411 | if (advance < 0) |
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412 | goto trunc; |
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413 | s += advance; |
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414 | break; |
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415 | case LWRES_OPCODE_GETRDATABYNAME: |
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416 | /* XXX no trace, not tested */ |
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417 | grbn = (lwres_grbnrequest_t *)(np + 1); |
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418 | TCHECK(grbn->namelen); |
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419 | |
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420 | /* BIND910: not used */ |
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421 | if (vflag > 2) { |
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422 | printf(" flags:0x%x", |
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423 | EXTRACT_32BITS(&grbn->flags)); |
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424 | } |
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425 | |
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426 | printf(" %s", tok2str(ns_type2str, "Type%d", |
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427 | EXTRACT_16BITS(&grbn->rdtype))); |
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428 | if (EXTRACT_16BITS(&grbn->rdclass) != C_IN) { |
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429 | printf(" %s", tok2str(ns_class2str, "Class%d", |
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430 | EXTRACT_16BITS(&grbn->rdclass))); |
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431 | } |
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432 | |
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433 | /* XXX grbn points to packed struct */ |
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434 | s = (const char *)&grbn->namelen + |
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435 | sizeof(grbn->namelen); |
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436 | l = EXTRACT_16BITS(&grbn->namelen); |
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437 | |
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438 | advance = lwres_printname(l, s); |
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439 | if (advance < 0) |
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440 | goto trunc; |
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441 | s += advance; |
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442 | break; |
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443 | default: |
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444 | unsupported++; |
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445 | break; |
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446 | } |
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447 | } else { |
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448 | /* |
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449 | * responses |
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450 | */ |
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451 | lwres_gabnresponse_t *gabn; |
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452 | lwres_gnbaresponse_t *gnba; |
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453 | lwres_grbnresponse_t *grbn; |
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454 | u_int32_t l, na; |
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455 | u_int32_t i; |
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456 | |
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457 | gabn = NULL; |
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458 | gnba = NULL; |
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459 | grbn = NULL; |
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460 | |
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461 | switch (EXTRACT_32BITS(&np->opcode)) { |
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462 | case LWRES_OPCODE_NOOP: |
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463 | break; |
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464 | case LWRES_OPCODE_GETADDRSBYNAME: |
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465 | gabn = (lwres_gabnresponse_t *)(np + 1); |
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466 | TCHECK(gabn->realnamelen); |
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467 | /* XXX gabn points to packed struct */ |
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468 | s = (const char *)&gabn->realnamelen + |
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469 | sizeof(gabn->realnamelen); |
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470 | l = EXTRACT_16BITS(&gabn->realnamelen); |
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471 | |
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472 | /* BIND910: not used */ |
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473 | if (vflag > 2) { |
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474 | printf(" flags:0x%x", |
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475 | EXTRACT_32BITS(&gabn->flags)); |
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476 | } |
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477 | |
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478 | printf(" %u/%u", EXTRACT_16BITS(&gabn->naliases), |
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479 | EXTRACT_16BITS(&gabn->naddrs)); |
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480 | |
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481 | advance = lwres_printname(l, s); |
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482 | if (advance < 0) |
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483 | goto trunc; |
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484 | s += advance; |
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485 | |
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486 | /* aliases */ |
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487 | na = EXTRACT_16BITS(&gabn->naliases); |
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488 | for (i = 0; i < na; i++) { |
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489 | advance = lwres_printnamelen(s); |
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490 | if (advance < 0) |
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491 | goto trunc; |
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492 | s += advance; |
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493 | } |
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494 | |
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495 | /* addrs */ |
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496 | na = EXTRACT_16BITS(&gabn->naddrs); |
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497 | for (i = 0; i < na; i++) { |
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498 | advance = lwres_printaddr((lwres_addr_t *)s); |
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499 | if (advance < 0) |
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500 | goto trunc; |
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501 | s += advance; |
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502 | } |
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503 | break; |
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504 | case LWRES_OPCODE_GETNAMEBYADDR: |
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505 | gnba = (lwres_gnbaresponse_t *)(np + 1); |
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506 | TCHECK(gnba->realnamelen); |
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507 | /* XXX gnba points to packed struct */ |
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508 | s = (const char *)&gnba->realnamelen + |
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509 | sizeof(gnba->realnamelen); |
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510 | l = EXTRACT_16BITS(&gnba->realnamelen); |
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511 | |
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512 | /* BIND910: not used */ |
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513 | if (vflag > 2) { |
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514 | printf(" flags:0x%x", |
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515 | EXTRACT_32BITS(&gnba->flags)); |
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516 | } |
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517 | |
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518 | printf(" %u", EXTRACT_16BITS(&gnba->naliases)); |
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519 | |
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520 | advance = lwres_printname(l, s); |
---|
521 | if (advance < 0) |
---|
522 | goto trunc; |
---|
523 | s += advance; |
---|
524 | |
---|
525 | /* aliases */ |
---|
526 | na = EXTRACT_16BITS(&gnba->naliases); |
---|
527 | for (i = 0; i < na; i++) { |
---|
528 | advance = lwres_printnamelen(s); |
---|
529 | if (advance < 0) |
---|
530 | goto trunc; |
---|
531 | s += advance; |
---|
532 | } |
---|
533 | break; |
---|
534 | case LWRES_OPCODE_GETRDATABYNAME: |
---|
535 | /* XXX no trace, not tested */ |
---|
536 | grbn = (lwres_grbnresponse_t *)(np + 1); |
---|
537 | TCHECK(grbn->nsigs); |
---|
538 | |
---|
539 | /* BIND910: not used */ |
---|
540 | if (vflag > 2) { |
---|
541 | printf(" flags:0x%x", |
---|
542 | EXTRACT_32BITS(&grbn->flags)); |
---|
543 | } |
---|
544 | |
---|
545 | printf(" %s", tok2str(ns_type2str, "Type%d", |
---|
546 | EXTRACT_16BITS(&grbn->rdtype))); |
---|
547 | if (EXTRACT_16BITS(&grbn->rdclass) != C_IN) { |
---|
548 | printf(" %s", tok2str(ns_class2str, "Class%d", |
---|
549 | EXTRACT_16BITS(&grbn->rdclass))); |
---|
550 | } |
---|
551 | printf(" TTL "); |
---|
552 | relts_print(EXTRACT_32BITS(&grbn->ttl)); |
---|
553 | printf(" %u/%u", EXTRACT_16BITS(&grbn->nrdatas), |
---|
554 | EXTRACT_16BITS(&grbn->nsigs)); |
---|
555 | |
---|
556 | /* XXX grbn points to packed struct */ |
---|
557 | s = (const char *)&grbn->nsigs+ sizeof(grbn->nsigs); |
---|
558 | |
---|
559 | advance = lwres_printnamelen(s); |
---|
560 | if (advance < 0) |
---|
561 | goto trunc; |
---|
562 | s += advance; |
---|
563 | |
---|
564 | /* rdatas */ |
---|
565 | na = EXTRACT_16BITS(&grbn->nrdatas); |
---|
566 | for (i = 0; i < na; i++) { |
---|
567 | /* XXX should decode resource data */ |
---|
568 | advance = lwres_printbinlen(s); |
---|
569 | if (advance < 0) |
---|
570 | goto trunc; |
---|
571 | s += advance; |
---|
572 | } |
---|
573 | |
---|
574 | /* sigs */ |
---|
575 | na = EXTRACT_16BITS(&grbn->nsigs); |
---|
576 | for (i = 0; i < na; i++) { |
---|
577 | /* XXX how should we print it? */ |
---|
578 | advance = lwres_printbinlen(s); |
---|
579 | if (advance < 0) |
---|
580 | goto trunc; |
---|
581 | s += advance; |
---|
582 | } |
---|
583 | break; |
---|
584 | default: |
---|
585 | unsupported++; |
---|
586 | break; |
---|
587 | } |
---|
588 | } |
---|
589 | |
---|
590 | tail: |
---|
591 | /* length mismatch */ |
---|
592 | if (EXTRACT_32BITS(&np->length) != length) { |
---|
593 | printf(" [len: %u != %u]", EXTRACT_32BITS(&np->length), |
---|
594 | length); |
---|
595 | } |
---|
596 | if (!unsupported && s < (const char *)np + EXTRACT_32BITS(&np->length)) |
---|
597 | printf("[extra]"); |
---|
598 | return; |
---|
599 | |
---|
600 | trunc: |
---|
601 | printf("[|lwres]"); |
---|
602 | return; |
---|
603 | } |
---|