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1 /* |
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2 * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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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 |
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20 |
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21 #include <ip6_hdr.h> |
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22 #include <icmp6_hdr.h> |
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23 #include <udp_hdr.h> |
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24 #include <ext_hdr.h> |
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25 #include <in_sock.h> |
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26 #include "ncmconnectionmultiplexerlogs.h" |
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27 #include "cncmicmpv6receiver.h" |
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28 #include "mncmicmpobserver.h" |
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29 #include "cncmicmpsender.h" |
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30 |
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31 // ----------------------------------------------------------------------------- |
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32 // CNcmIcmpV6Receiver::NewL |
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33 // ----------------------------------------------------------------------------- |
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34 // |
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35 CNcmIcmpV6Receiver* CNcmIcmpV6Receiver::NewL( RSocketServ& aServer, |
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36 RConnection& aConnection, MNcmIcmpObserver& aObserver ) |
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37 { |
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38 CNcmIcmpV6Receiver* self = |
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39 new ( ELeave ) CNcmIcmpV6Receiver( aServer, aConnection, aObserver ); |
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40 |
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41 CleanupStack::PushL( self ); |
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42 self->ConstructL(); |
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43 CleanupStack::Pop( self ); |
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44 return self; |
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45 } |
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46 |
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47 |
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48 // ----------------------------------------------------------------------------- |
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49 // CNcmIcmpV6Receiver::CNcmIcmpV6Receiver |
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50 // ----------------------------------------------------------------------------- |
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51 // |
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52 CNcmIcmpV6Receiver::CNcmIcmpV6Receiver( RSocketServ& aServer, |
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53 RConnection& aConnection, MNcmIcmpObserver& aObserver ) : |
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54 CActive( CActive::EPriorityStandard ), |
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55 iServer( aServer ), |
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56 iConnection( aConnection ), |
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57 iObserver( aObserver ) |
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58 { |
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59 CActiveScheduler::Add( this ); |
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60 } |
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61 |
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62 |
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63 // ----------------------------------------------------------------------------- |
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64 // CNcmIcmpV6Receiver::ConstructL |
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65 // ----------------------------------------------------------------------------- |
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66 // |
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67 void CNcmIcmpV6Receiver::ConstructL() |
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68 { |
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69 User::LeaveIfError( iSocket.Open( |
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70 iServer, KAfInet, KSockDatagram, KProtocolInet6Icmp, iConnection ) ); |
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71 |
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72 iIcmpSender = CNcmIcmpSender::NewL( iSocket ); |
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73 |
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74 Receive(); |
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75 } |
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76 |
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77 |
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78 // ----------------------------------------------------------------------------- |
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79 // CNcmIcmpV6Receiver::~CNcmIcmpV6Receiver |
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80 // ----------------------------------------------------------------------------- |
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81 // |
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82 CNcmIcmpV6Receiver::~CNcmIcmpV6Receiver() |
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83 { |
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84 Cancel(); |
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85 |
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86 delete iIcmpSender; |
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87 iSocket.Close(); |
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88 } |
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89 |
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90 |
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91 // ----------------------------------------------------------------------------- |
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92 // CNcmIcmpV6Receiver::RunL |
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93 // ----------------------------------------------------------------------------- |
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94 // |
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95 void CNcmIcmpV6Receiver::RunL() |
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96 { |
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97 if ( iStatus == KErrNone ) |
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98 { |
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99 CheckError(); |
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100 Receive(); |
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101 } |
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102 } |
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103 |
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104 |
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105 // ----------------------------------------------------------------------------- |
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106 // CNcmIcmpV6Receiver::CheckError |
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107 // ----------------------------------------------------------------------------- |
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108 // |
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109 void CNcmIcmpV6Receiver::CheckError() |
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110 { |
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111 const TUint KDestinationUnreachable = 1; |
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112 |
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113 // Pointer to ICMP header |
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114 TInet6HeaderICMP* icmpPtr( ( TInet6HeaderICMP* ) iData.Ptr() ); |
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115 |
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116 // Pointer to IPv6 header |
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117 const TInt KIPHeaderOffset = 8; |
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118 TInet6HeaderIP* ipv6Ptr = |
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119 ( TInet6HeaderIP* )( iData.Ptr() + KIPHeaderOffset ); |
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120 |
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121 // Get the whole length of the header in bytes |
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122 TUint32 payloadLength( ipv6Ptr->PayloadLength() ); |
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123 TUint32 offset( 0 ); |
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124 |
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125 // Pointer to IPv6 extension header |
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126 const TInt KHeaderExtensionOffset = 14; |
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127 TInet6HeaderExtension* extPtr = |
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128 ( TInet6HeaderExtension* )( iData.Ptr() + KHeaderExtensionOffset ); |
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129 // Get the extension header length in bytes |
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130 TUint32 extHdrLength( extPtr->HeaderLength() ); |
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131 |
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132 // Pointer to UDP data |
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133 TInet6HeaderUDP* udpPtr = ( TInet6HeaderUDP* )( ipv6Ptr->EndPtr() ); |
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134 |
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135 // Error message type |
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136 TUint32 error( icmpPtr->Type() ); |
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137 if ( KDestinationUnreachable == error ) |
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138 { |
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139 TUint32 nextHeader( 0 ); |
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140 do // Search the correct header, if there are extension headers |
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141 { |
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142 nextHeader = extPtr->NextHeader(); |
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143 if( KProtocolInetUdp == nextHeader ) |
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144 { |
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145 // Get the destination port number |
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146 iAddress.SetPort( udpPtr->DstPort() ); |
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147 |
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148 // Set the destination address |
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149 iAddress.SetAddress( ipv6Ptr->DstAddr() ); |
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150 |
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151 __CONNECTIONMULTIPLEXER_INT1( |
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152 "CNcmIcmpV6Receiver::CheckError - ICMP error:", error ) |
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153 __CONNECTIONMULTIPLEXER_ADDRLOG( |
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154 " CNcmIcmpV6Receiver::CheckError - DstAddr:", iAddress ) |
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155 |
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156 TInetAddr localAddress; |
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157 TInetAddr remoteAddress; |
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158 iObserver.IcmpError( iAddress, localAddress, remoteAddress ); |
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159 |
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160 if ( !( remoteAddress.IsUnspecified() || |
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161 localAddress.IsUnspecified() ) ) |
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162 { |
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163 udpPtr->SetDstPort( localAddress.Port() ); |
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164 udpPtr->SetSrcPort( remoteAddress.Port() ); |
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165 |
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166 TInetAddr local( localAddress.Address() ); |
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167 local.ConvertToV4Mapped(); |
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168 ipv6Ptr->SetDstAddr( local.Ip6Address() ); |
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169 |
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170 TInetAddr remote( remoteAddress.Address() ); |
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171 local.ConvertToV4Mapped(); |
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172 ipv6Ptr->SetSrcAddr( remote.Ip6Address() ); |
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173 |
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174 iIcmpSender->Send( iData, remoteAddress ); |
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175 } |
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176 } |
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177 else |
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178 { |
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179 // Step to next header |
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180 if ( offset < payloadLength ) |
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181 { |
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182 extPtr = extPtr + extHdrLength; |
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183 offset = offset + extHdrLength; |
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184 } |
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185 } |
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186 // Loop until UDP datagram is found. If it is not found, |
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187 // get out of here and do nothing. |
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188 } while ( ( KProtocolInetUdp != nextHeader ) && |
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189 ( offset < payloadLength ) ); |
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190 } |
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191 } |
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192 |
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193 |
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194 // ----------------------------------------------------------------------------- |
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195 // CNcmIcmpV6Receiver::DoCancel |
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196 // ----------------------------------------------------------------------------- |
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197 // |
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198 void CNcmIcmpV6Receiver::DoCancel() |
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199 { |
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200 iSocket.CancelRecv(); |
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201 } |
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202 |
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203 |
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204 // ----------------------------------------------------------------------------- |
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205 // CNcmIcmpV6Receiver::Receive |
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206 // ----------------------------------------------------------------------------- |
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207 // |
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208 void CNcmIcmpV6Receiver::Receive() |
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209 { |
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210 if ( !IsActive() ) |
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211 { |
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212 iSocket.Recv( iData, 0, iStatus ); |
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213 SetActive(); |
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214 } |
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215 } |