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1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // DHCPv6 Message wrapper header file |
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15 // |
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16 // |
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17 |
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18 /** |
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19 @file |
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20 */ |
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21 |
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22 #ifndef DHCPIP6MSG_H |
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23 #define DHCPIP6MSG_H |
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24 |
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25 #include "DHCPMsg.h" |
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26 #include "DHCPIP6_Std.h" |
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27 #ifdef SYMBIAN_TCPIPDHCP_UPDATE |
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28 #include "DomainNameDecoder.h" |
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29 #endif //SYMBIAN_TCPIPDHCP_UPDATE |
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30 //!!!!BEWARE all message handling so far (except message receiver) expects there's a buffer long enough |
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31 //to hold whatever necessary. |
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32 //We should be able to compute the length of needed buffer beforehand based on the message structure |
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33 |
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34 _LIT( KDhcpv6, "DHCPv6" ); |
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35 |
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36 class TInetAddr; |
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37 class TDhcpRnd; |
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38 |
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39 namespace DHCPv6 |
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40 { |
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41 |
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42 enum TMessageType |
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43 /** |
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44 * DHCPv6::TMessageType |
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45 * |
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46 * The message type constants for the DHCPv6 |
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47 * message type option for inclusion in DHCPv6 |
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48 * messages. |
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49 * |
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50 * @internalTechnology |
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51 */ |
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52 { |
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53 ESolicit = 0x01, // request |
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54 EAdvertise, // reply |
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55 ERequest, // request |
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56 EConfirm, // request |
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57 ERenew, // request |
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58 ERebind, // request |
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59 EReply, // reply |
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60 ERelease, // request |
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61 EDecline, // request |
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62 EReconfigure, // reply |
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63 EInformationRequest, // request |
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64 // ERelayForw, // not supported |
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65 // ERelayRepl // not supported |
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66 EUnknown = 0xFAFA |
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67 }; |
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68 |
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69 /** |
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70 * DHCPv6::TStatusCodes |
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71 * A Status Code option may appear in the options field of a DHCP |
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72 * message and/or in the options field of another option. If the Status |
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73 * Code option does not appear in a message in which the option could |
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74 * appear, the status of the message is assumed to be Success. |
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75 */ |
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76 enum TStatusCodes |
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77 { |
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78 //RFC status codes |
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79 ESuccess = 0, //Success. |
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80 EUnspecFail = 1, //Failure, reason unspecified; this |
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81 //status code is sent by either a client |
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82 //or a server to indicate a failure |
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83 //not explicitly specified in this |
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84 //document. |
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85 ENoAddrsAvail = 2, //Server has no addresses available to assign to |
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86 //the IA(s). |
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87 ENoBinding = 3, //Client record (binding) unavailable. |
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88 ENotOnLink = 4, //The prefix for the address is not appropriate for |
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89 //the link to which the client is attached. |
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90 EUseMulticast = 5, //Sent by a server to a client to force the |
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91 //client to send messages to the server. |
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92 //using the All_DHCP_Relay_Agents_and_Servers |
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93 //address. |
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94 //internal component status codes |
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95 EMarkForRelease = 128, |
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96 EMarkForDecline = 129, |
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97 EMarkToRequest = 130, |
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98 EStatusUnknown = 0xFF, //highest possible status code |
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99 |
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100 }; |
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101 /** |
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102 * DHCPv6 negotiation constants (the time values are in seconds) |
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103 * |
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104 * @internalTechnology |
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105 */ |
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106 const TInt KSolMaxDelay = 1; //sec Max delay of first Solicit |
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107 const TInt KSolTimeout = 1; //sec Initial Solicit timeout |
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108 const TInt KSolMaxRt = 120; //secs Max Solicit timeout value |
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109 const TInt KReqTimeout = 1; //sec Initial Request timeout |
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110 const TInt KReqMaxRt = 30; //secs Max Request timeout value |
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111 const TInt KReqMaxRc = 10; // Max Request retry attempts |
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112 const TInt KCnfMaxDelay = 1; //sec Max delay of first Confirm |
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113 const TInt KCnfTimeout = 1; //sec Initial Confirm timeout |
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114 const TInt KCnfMaxRt = 4; //secs Max Confirm timeout |
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115 const TInt KCnfMaxRd = 10; //secs Max Confirm duration |
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116 const TInt KRenTimeout = 10; //secs Initial Renew timeout |
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117 const TInt KRenMaxRt = 600; //secs Max Renew timeout value |
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118 const TInt KRebTimeout = 10; //secs Initial Rebind timeout |
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119 const TInt KRebMaxRt = 600; //secs Max Rebind timeout value |
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120 const TInt KInfMaxDelay = 1; //sec Max delay of first Information-request |
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121 const TInt KInfTimeout = 1; //sec Initial Information-request timeout |
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122 const TInt KInfMaxRt = 120; //secs Max Information-request timeout value |
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123 const TInt KRelTimeout = 1; //sec Initial Release timeout |
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124 const TInt KRelMaxRc = 5; // MAX Release attempts |
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125 const TInt KDecTimeout = 1; //sec Initial Decline timeout |
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126 const TInt KDecMaxRc = 5; // Max Decline attempts |
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127 const TInt KRecTimeout = 2; //secs Initial Reconfigure timeout |
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128 const TInt KRecMaxRc = 8; // Max Reconfigure attempts |
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129 const TInt KHopCountLimit = 32; // Max hop count in a Relay-forward message |
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130 |
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131 /******DHCP extension template []->optional - the code dependent****** |
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132 0 1 2 3 |
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133 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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134 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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135 | option-code | option-len | |
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136 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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137 | option-data | |
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138 | (option-len octets) | |
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139 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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140 |
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141 option-code An unsigned integer identifying the specific option |
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142 type carried in this option. |
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143 |
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144 option-len An unsigned integer giving the length of the |
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145 option-data field in this option in octets. |
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146 |
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147 option-data The data for the option; the format of this data |
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148 depends on the definition of the option. |
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149 +-+-+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-++-+-+-+-+-+ |
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150 | fixed part | variable part (option list) | |
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151 +-+-+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-++-+-+-+-+-+ |
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152 *********************************************************************/ |
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153 enum TOptionCodes |
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154 /** |
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155 * DHCPv6::TOptionCodes |
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156 * |
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157 * The constant values for each supported |
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158 * option type. |
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159 * |
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160 * @internalTechnology |
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161 */ |
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162 { |
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163 EClientId = 1, //Client DUID |
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164 EServerId = 2, //Server DUID |
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165 EIaNa = 3, //Identity Association for Non-temporary Addresses |
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166 EIaTa = 4, //Identity Association for Temporary Addresses |
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167 EIaAddr = 5, //IPv6 addresses associated with an IA_NA(EIaNa) or an IA_TA(EIaTa) |
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168 EOro = 6, //Option Request - identify a list of options in a message |
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169 EPreference = 7, |
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170 EElapsedTime = 8, |
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171 ERelayMsg = 9, //for relay agents only |
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172 EAuthentication = 11, |
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173 EUnicast = 12, //server sends to indicate the client is allowed to unicast messages |
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174 EStatusCode = 13, |
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175 ERapidCommit = 14, |
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176 EUserClass = 15, |
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177 EVendorClass = 16, |
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178 EVendorOpts = 17, |
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179 EInterfaceId = 18, //for relay agents only |
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180 EReconfMsg = 19, |
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181 EReconfAccept = 20, |
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182 ESipServerD = 21, //SIP Server Domain Name List |
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183 ESipServerA = 22, //SIP Servers IPv6 Address List |
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184 //the options 23/24 are just in Solicit, Advertise, Request, Renew, Rebind, Information-Request, and Reply |
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185 EDNSServers = 23, |
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186 EDomainList = 24, //Domain Search List option |
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187 EOptionAny = 0xFAFA |
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188 //prefix delegation |
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189 //otion lifetime |
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190 }; |
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191 |
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192 enum TReconfigureTypes |
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193 { |
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194 EReconfigureRenew = 5, |
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195 EReconfigureInformRequest = 11 |
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196 }; |
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197 |
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198 const TInt KDHCPHeaderLength = 4; |
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199 const TInt KXidLength = 3; |
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200 const TInt KXidOffset = 1; |
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201 const TInt KOptionHeaderLength = 4; |
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202 const TInt K32bitNumberOctets = 4; |
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203 const TInt KOptionLengthOffset = 2; |
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204 const TInt KOptionCodeOffset = 0; |
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205 const TInt KOptionCodeLen = 2; |
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206 const TInt KElapsedTimeOptionLen = 2; |
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207 const TInt KOptionLengthLen = 2; |
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208 |
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209 const TInt KDuidTypeLen = 2; |
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210 const TInt KDuidLLTypeCode = 3; |
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211 const TInt KDuidHardwareTypeLen = 2; |
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212 const TInt KDuidEthMacAddrSize = 6; |
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213 |
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214 template <typename LAYOUT> |
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215 class TOptionHeader : public TValue< LAYOUT > |
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216 { |
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217 public: |
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218 TOptionHeader(TInt aValueLength) : |
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219 TValue<LAYOUT>(aValueLength) |
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220 { |
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221 }; |
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222 |
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223 TInt GetValue(const TUint8* aPtr8) const; |
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224 void SetValue(TUint8* aPtr8, TInt aValue) const; |
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225 }; |
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226 |
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227 template <typename LAYOUT> |
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228 TInt TOptionHeader<LAYOUT>::GetValue(const TUint8* aPtr8) const |
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229 { |
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230 __ASSERT_DEBUG( this->iValueLength == KOptionHeaderLength, User::Panic( KDhcpv6, KErrBadDescriptor ) ); |
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231 return LAYOUT::GetValue(aPtr8 + KOptionLengthOffset, this->iValueLength - KOptionLengthOffset); |
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232 } |
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233 |
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234 template <typename LAYOUT> |
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235 void TOptionHeader<LAYOUT>::SetValue(TUint8* aPtr8, TInt aValue) const |
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236 { |
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237 __ASSERT_DEBUG( this->iValueLength == KOptionHeaderLength, User::Panic( KDhcpv6, KErrBadDescriptor ) ); |
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238 LAYOUT::SetValue(aPtr8 + KOptionLengthOffset, this->iValueLength - KOptionLengthOffset, aValue); |
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239 } |
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240 |
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241 template <class TLAYOUT> |
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242 class COption : public CItem<TOptionHeader<TLAYOUT> > |
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243 { |
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244 public: |
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245 COption(CItemBase* aNext) : |
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246 CItem<TOptionHeader<TLAYOUT> >(aNext, KOptionHeaderLength) |
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247 { |
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248 } |
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249 |
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250 TUint OpCode() const |
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251 { |
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252 return TLAYOUT::GetValue( this->CItemBase::iPtr8, KOptionCodeLen ); |
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253 } |
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254 void SetOpCode(TUint aOpCode) |
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255 { |
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256 TLAYOUT::SetValue( this->CItemBase::iPtr8, KOptionCodeLen, aOpCode ); |
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257 } |
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258 }; |
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259 |
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260 class COptionNode : public COption<TBigEndian> |
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261 /** |
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262 * represents one DHCPv6 option in a message |
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263 * |
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264 * |
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265 * @internalTechnology |
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266 */ |
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267 { |
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268 friend class COptionList; |
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269 |
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270 public: |
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271 |
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272 #ifdef __FLOG_ACTIVE |
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273 virtual void Dump(const TDesC& aTag, const TDesC& aFile); |
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274 #endif |
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275 |
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276 static COptionNode* NewL(); |
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277 |
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278 public: |
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279 TRecord iRecord; |
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280 |
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281 protected: |
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282 COptionNode( CItemBase* aNext ); |
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283 virtual ~COptionNode(); |
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284 }; |
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285 |
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286 |
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287 inline COptionNode::COptionNode( CItemBase* aNext ) : |
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288 COption<TBigEndian>(aNext), |
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289 iRecord( NULL ) |
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290 { |
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291 iRecord.iFirst = this; //to get rid of too cautious warning C4355 (assignment of uncompleted this) |
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292 } |
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293 |
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294 class COptionList : public CListItem |
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295 { |
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296 public: |
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297 COptionList(CItemBase* aNext); |
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298 |
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299 COptionNode* AddNodeL(TOptionCodes aOpCode, TInt aInitialLength); |
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300 COptionNode* FindOption(TUint aOpCode) const; |
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301 COptionNode* FindOption(TUint aOpCode, TInt& aPos) const; |
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302 |
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303 virtual void ParseL(TPtr8& aDes8); |
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304 |
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305 //get 32bit value (offset == aIndex * 4bytes) |
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306 TUint32 GetL( TInt aIndex, TUint aOpCode ) const; |
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307 |
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308 protected: |
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309 static COptionNode* CreateNodeL( TUint aOpCode ); |
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310 }; |
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311 |
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312 inline COptionList::COptionList(CItemBase* aNext) : |
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313 CListItem(aNext, 0) |
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314 { |
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315 } |
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316 |
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317 inline COptionNode* COptionList::FindOption(TUint aOpCode) const |
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318 /** |
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319 * Find the location of an option in the message and return a pointer to it |
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320 * |
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321 * @internalTechnology |
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322 */ |
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323 { |
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324 TInt dummy = 0; |
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325 return FindOption(aOpCode,dummy); |
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326 } |
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327 |
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328 class CDHCPOptionAny : public COptionNode |
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329 /** |
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330 * Class parsing any DHCP option that has a structure given by a subclass and |
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331 * followed by unspecified trailing option data (member iOptionData) |
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332 * |
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333 * @internalTechnology |
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334 */ |
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335 { |
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336 |
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337 public: |
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338 CDHCPOptionAny(CItemBase* aNext) : |
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339 COptionNode( aNext ) |
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340 { |
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341 } |
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342 |
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343 static COptionNode* NewL(); |
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344 |
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345 #if 0 |
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346 public: |
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347 virtual void ParseL( TPtr8& aDes8 ); |
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348 |
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349 public: |
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350 TPtr8 OptionData(); |
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351 |
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352 protected: |
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353 TUint8* iPtrOptionData; |
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354 TInt iLenOptionData; |
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355 #endif |
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356 }; |
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357 |
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358 /** |
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359 * This DNS Recursive Name Server option(option 23) returns the Recursive DNS server addresses |
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360 * Ref: RFC 3646 |
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361 * @internalTechnology |
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362 */ |
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363 class CDHCPOptionDNSServers : public COptionNode |
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364 { |
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365 public: |
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366 CDHCPOptionDNSServers() : |
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367 COptionNode(NULL) |
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368 { |
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369 } |
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370 |
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371 virtual void ParseL( TPtr8& aDes8 ); |
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372 |
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373 TBool GetDomainNameServer( TInt aIndex, TInetAddr& addr ); |
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374 }; |
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375 |
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376 |
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377 /** |
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378 * This option returns the SIP server addresses |
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379 * |
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380 * @internalTechnology |
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381 */ |
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382 class CDHCPOptionSipServerAddrs : public COptionNode |
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383 { |
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384 public: |
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385 CDHCPOptionSipServerAddrs() : |
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386 COptionNode(NULL) |
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387 { |
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388 } |
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389 |
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390 virtual void ParseL(TPtr8& aDes8); |
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391 |
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392 TBool GetSipServerAddr(TInt aIndex, TInetAddr& addr); |
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393 }; |
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394 |
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395 /** |
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396 * This option returns the SIP server domain names |
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397 * |
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398 * @internalTechnology |
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399 */ |
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400 class CDHCPOptionSipServerDomains : public COptionNode |
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401 { |
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402 public: |
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403 CDHCPOptionSipServerDomains() : |
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404 COptionNode(NULL) |
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405 { |
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406 } |
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407 |
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408 virtual void ParseL(TPtr8& aDes8); |
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409 |
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410 TBool GetSipServerDomains(TInt aIndex, THostName& aName); |
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411 }; |
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412 #ifdef SYMBIAN_TCPIPDHCP_UPDATE |
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413 /** |
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414 * This Domain Search List option(option 24) returns the Domain names while doing |
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415 * name resolution |
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416 * Ref: RFC 3646 |
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417 * @internalTechnology |
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418 */ |
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419 class CDHCPOptionDomainSearchList : public COptionNode |
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420 { |
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421 public: |
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422 CDHCPOptionDomainSearchList() : |
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423 COptionNode(NULL) |
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424 { |
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425 } |
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426 |
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427 virtual void ParseL(TPtr8& aDes8); |
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428 |
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429 TBool GetDomainSearchList(TInt aIndex, THostName& aName); |
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430 }; |
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431 |
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432 #endif //SYMBIAN_TCPIPDHCP_UPDATE |
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433 |
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434 const TInt KDHCPOptionStatusCodeLength = 2; //bytes |
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435 |
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436 class CDHCPOptionStatusCode : public CDHCPOptionAny |
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437 /** |
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438 * This option returns a status indication related to the DHCP message |
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439 * or option in which it appears. |
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440 * |
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441 * @internalTechnology |
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442 */ |
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443 { |
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444 |
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445 public: |
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446 CDHCPOptionStatusCode() : CDHCPOptionAny(NULL) |
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447 { |
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448 } |
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449 |
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450 COptionNode* NewL(); |
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451 |
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452 public: |
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453 TUint32 GetStatusCode() const; |
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454 void SetStatusCode( TUint32 aStatusCode ); |
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455 }; |
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456 |
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457 const TInt KDHCPOptionRequestLen = 12; |
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458 |
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459 class CDHCPOptionRequestOption : public COptionNode |
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460 /** |
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461 * This option returns a status indication related to the DHCP message |
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462 * or option in which it appears. |
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463 * |
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464 * @internalTechnology |
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465 */ |
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466 { |
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467 |
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468 public: |
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469 CDHCPOptionRequestOption() : |
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470 COptionNode( NULL ) |
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471 { |
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472 } |
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473 |
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474 static COptionNode* NewL(); |
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475 |
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476 public: |
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477 void AppendRequestedOptions(); |
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478 |
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479 }; |
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480 |
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481 /**********************DHCPv6 message header**************************** |
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482 0 1 2 3 |
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483 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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484 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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485 | msg-type | transaction-id | |
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486 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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487 | | |
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488 . options . |
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489 . (variable) . |
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490 | | |
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491 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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492 |
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493 msg-type Identifies the DHCP message type; the |
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494 available message types are listed in |
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495 section 5.3. |
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496 |
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497 transaction-id The transaction ID for this message exchange. |
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498 |
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499 options Options carried in this message; options are |
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500 described in section 22. |
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501 **********************************************************************/ |
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502 class CDHCPMessageHeaderIP6 : public CDHCPMessageHeader |
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503 { |
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504 public: |
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505 CDHCPMessageHeaderIP6(HBufC8*& aMsg) : |
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506 CDHCPMessageHeader(&iOptions, KDHCPHeaderLength, aMsg), |
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507 iOptions(NULL) |
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508 { |
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509 #ifdef _FLOG_ACTIVE |
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510 iOptions.iName = _L("Options"); |
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511 #endif |
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512 } |
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513 ~CDHCPMessageHeaderIP6(); |
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514 |
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515 public: |
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516 TInt Parse(const TDhcpRnd& aXid, const TDesC8& aClientId, RBuf8& aServerId); |
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517 virtual void RemoveAllOptions(); |
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518 |
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519 DHCPv6::COptionNode* AddOptionL(DHCPv6::TOptionCodes aOpCode, TInt aLength); |
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520 |
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521 void SetMessageType(TUint8 aMsgType); |
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522 void SetXid(TUint32 aXid); // Transaction ID |
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523 TUint8 GetMessageType() const; |
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524 TUint32 GetXid() const; // Transaction ID |
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525 DHCPv6::TStatusCodes GetStatusCode() const; //returns status code for the message |
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526 //if no status option present it returns success |
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527 |
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528 inline DHCPv6::COptionList& GetOptions() { return iOptions; }; |
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529 |
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530 void Close() //so as it could be put on the stack and on the cleanup stack |
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531 { |
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532 iOptions.RemoveAllNodes(); |
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533 } |
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534 |
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535 protected: |
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536 DHCPv6::COptionList iOptions; |
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537 |
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538 }; |
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539 |
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540 inline DHCPv6::TStatusCodes CDHCPMessageHeaderIP6::GetStatusCode() const |
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541 {//for the moment inline |
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542 return DHCPv6::ESuccess; |
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543 } |
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544 |
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545 inline void CDHCPMessageHeaderIP6::RemoveAllOptions() |
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546 { |
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547 iOptions.RemoveAllNodes(); |
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548 } |
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549 |
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550 inline TUint8 CDHCPMessageHeaderIP6::GetMessageType() const |
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551 /** |
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552 * Retrieve message type |
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553 * |
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554 * @internalTechnology |
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555 * |
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556 */ |
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557 { |
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558 return static_cast<TUint8>(*Ptr()); |
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559 } |
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560 |
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561 inline void CDHCPMessageHeaderIP6::SetMessageType(TUint8 aMsgType) |
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562 /** |
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563 * Set Message Type |
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564 * |
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565 * @internalTechnology |
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566 * |
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567 */ |
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568 { |
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569 TUint8* ptr = Ptr(); |
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570 *ptr = aMsgType; |
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571 } |
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572 |
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573 inline void CDHCPMessageHeaderIP6::SetXid(TUint32 aXid) |
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574 /** |
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575 * Set Transaction ID in message |
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576 * |
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577 * @internalTechnology |
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578 * |
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579 */ |
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580 {//set it as a big endian |
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581 TBigEndian::SetValue( Ptr() + KXidOffset, KXidLength, aXid ); |
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582 } |
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583 |
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584 inline TUint32 CDHCPMessageHeaderIP6::GetXid() const |
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585 /** |
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586 * Retrieve Transaction ID from message |
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587 * |
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588 * @internalTechnology |
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589 * |
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590 */ |
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591 {//get as a big endian |
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592 return TBigEndian::GetValue( Ptr() + KXidOffset, KXidLength ); |
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593 } |
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594 |
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595 } //namespace DHCPv6 |
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596 #endif |