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1 // Copyright (c) 2003-2009 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 // Implements the DHCP IP4 control plain |
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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 DHCPIP4Control.cpp |
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20 @internalTechnology |
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21 */ |
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22 |
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23 #include "DHCPIP4Control.h" |
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24 #include "DHCPIP4States.h" |
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25 #include "DHCPIP4Msg.h" |
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26 #include "DHCPServer.h" |
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27 #include "DHCPConfigListener.h" |
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28 #include "DHCPDb.h" |
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29 #include "ExpireTimer.h" |
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30 #include "NetCfgExtDhcpControl.h" |
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31 #include "DomainNameDecoder.h" |
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32 #include <nifman.h> |
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33 #include <comms-infras/es_config.h> |
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34 #include "netcfgextndhcpmsg.h" |
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35 #include <f32file.h> |
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36 #include <comms-infras/metatype.h> |
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37 #include <comms-infras/metadata.h> |
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38 #ifdef SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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39 #include "DHCPIP4Msg.h" |
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40 #ifdef SYMBIAN_NETWORKING_ADDRESS_PROVISION |
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41 #include "dhcphwaddrmanager.h" |
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42 #endif //SYMBIAN_NETWORKING_ADDRESS_PROVISION |
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43 using namespace DHCPv4; |
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44 #endif//SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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45 |
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46 struct TDHCPv4Persistent : public Meta::SMetaData |
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47 { |
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48 TDHCPv4Persistent() : |
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49 iTaskStartedAt( 0 ), |
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50 iCurrentAddress(KInetAddrNone,KInetPortNone), |
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51 iLeaseTime(0) |
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52 { |
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53 } |
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54 |
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55 TTime iTaskStartedAt; |
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56 TInetAddr iCurrentAddress; |
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57 TUint32 iLeaseTime; |
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58 |
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59 DATA_VTABLE |
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60 }; |
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61 |
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62 START_ATTRIBUTE_TABLE( TDHCPv4Persistent, KDHCPv4Persinstence, KDHCPv4PersinstenceId ) |
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63 REGISTER_ATTRIBUTE( TDHCPv4Persistent, iTaskStartedAt, TMetaTime ) |
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64 REGISTER_ATTRIBUTE( TDHCPv4Persistent, iCurrentAddress, TMeta<TInetAddr> ) |
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65 REGISTER_ATTRIBUTE( TDHCPv4Persistent, iLeaseTime, TMetaNumber ) |
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66 END_ATTRIBUTE_TABLE() |
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67 |
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68 CDHCPIP4Control::~CDHCPIP4Control() |
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69 { |
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70 } |
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71 |
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72 void CDHCPIP4Control::ConfigureL(const TConnectionInfo& aInfo, const RMessage2* aMessage) |
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73 /** |
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74 * Open and attach to the RConnection |
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75 * |
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76 * @internalTechnology |
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77 */ |
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78 { |
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79 CDHCPControl::ConfigureL( aInfo, aMessage ); |
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80 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("CDHCPIP4Control::ConfigureL"))); |
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81 |
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82 iDhcpDb = new (ELeave) CDHCPDb( TPtrC( SERVICE_IP_DNS_ADDR_FROM_SERVER ), |
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83 TPtrC( SERVICE_IP_NAME_SERVER1 ), |
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84 TPtrC( SERVICE_IP_NAME_SERVER2 )); //for both version for the time being see the class TDHCPIP4Db coments |
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85 FindInterfaceNameL(aInfo,KAfInet); |
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86 #ifdef SYMBIAN_NETWORKING_DHCPSERVER |
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87 #ifndef SYMBIAN_NETWORKING_ADDRESS_PROVISION |
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88 iDhcpStateMachine = CDHCPIP4StateMachine::NewL(iEsock, iConnection, iInterfaceName,iDHCPServerImpl); |
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89 #else |
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90 iDhcpHwAddrManager = CDhcpHwAddrManager::NewL(); |
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91 iDhcpStateMachine = CDHCPIP4StateMachine::NewL(iEsock, iConnection, iInterfaceName,iDhcpHwAddrManager, iDHCPServerImpl); |
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92 #endif //SYMBIAN_NETWORKING_ADDRESS_PROVISION |
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93 #else |
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94 iDhcpStateMachine = CDHCPIP4StateMachine::NewL(iEsock, iConnection, iInterfaceName); |
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95 #endif // SYMBIAN_NETWORKING_DHCPSERVER |
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96 TDHCPv4Persistent pers; |
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97 iStaticAddress = !iDhcpDb->ReadL(*iDhcpStateMachine, pers); |
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98 |
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99 |
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100 //initialise relevant data |
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101 TTimeIntervalSeconds seconds = static_cast<TInt>(pers.iLeaseTime); |
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102 iDhcpDb->iLeaseExpiresAt = pers.iTaskStartedAt + seconds; |
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103 DhcpStateMachine()->iLeaseTime = pers.iLeaseTime; |
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104 iDhcpStateMachine->SetCurrentAddress( pers.iCurrentAddress ); |
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105 DhcpStateMachine()->iMaxRetryCount = 2; //Max retry count for the first run is set to 2 |
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106 |
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107 |
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108 TInetAddr existingGlobalAddr = iDhcpStateMachine->GetInterfaceGlobalAddress(); |
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109 |
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110 if( ! existingGlobalAddr.IsUnspecified() ) |
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111 { |
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112 // there was an existing address on the interface, regardless of commsdat preference.. |
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113 // so force inform. |
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114 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("Interface already has global address. Forcing inform mode."))); |
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115 iDhcpStateMachine->SetCurrentAddress( existingGlobalAddr ); |
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116 iStaticAddress = ETrue; |
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117 } |
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118 else |
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119 { |
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120 if(iStaticAddress) |
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121 { |
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122 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("Interface has a static address from commsdat. Proceeding in inform mode."))); |
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123 } |
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124 else |
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125 { |
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126 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("Interface has no global address yet. Proceeding in discover mode."))); |
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127 } |
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128 } |
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129 |
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130 CDHCPControl::ConfigureL(iStaticAddress); |
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131 } |
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132 |
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133 void CDHCPIP4Control::Cancel() |
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134 { |
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135 iClientShouldCompleteWhenLinkLocalCreated = EFalse; |
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136 |
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137 // Call the base class. |
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138 CDHCPControl::Cancel(); |
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139 } |
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140 |
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141 void CDHCPIP4Control::BindingFinishedL() |
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142 { |
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143 CDHCPControl::BindingFinishedL(); |
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144 TDHCPv4Persistent pers; |
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145 //get relevant data from statemachine |
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146 pers.iTaskStartedAt = DhcpStateMachine()->iStartedAquisitionAt; |
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147 pers.iCurrentAddress = DhcpStateMachine()->iCurrentAddress; |
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148 pers.iLeaseTime = DhcpStateMachine()->iLeaseTime; |
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149 TRAPD( ret, iDhcpDb->WriteL(*iDhcpStateMachine, pers) ); |
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150 if (ret!=KErrNone) |
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151 { |
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152 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("CDHCPIP4Control::BindingFinishedL error: %d"),ret)); |
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153 } |
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154 } |
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155 |
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156 void CDHCPIP4Control::TimerExpired() |
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157 /** |
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158 * Called by the timer to signal that the timer has expired |
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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 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("CDHCPIP4Control::TimerExpired()"))); |
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164 |
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165 CDHCPControl::TimerExpired(); |
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166 |
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167 // In response to the rebind operation timing out, try to create |
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168 // a link local to allow local addressing (may not be supported |
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169 // by current interface's IPv4 link local option). We cannot |
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170 // create the link local earlier (e.g., after a renew attempt |
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171 // times-out) because the link local will not be usable until |
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172 // the DHCP assigned address has been removed (randomly |
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173 // generated addresses are prioritised below non-randomly |
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174 // generated addresses during selection in the TCP/IP stack). |
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175 if( ( iState == EInitInProgress ) && iDhcpConfigListener && !iDhcpConfigListener->HaveLinkLocal() ) |
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176 { |
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177 DhcpStateMachine()->CreateIPv4LinkLocal(); |
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178 } |
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179 } |
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180 |
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181 TInt CDHCPIP4Control::HandleClientRequestL(TUint aName, TInt aValue) |
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182 /** |
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183 * Handles client requests made through RConnection |
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184 * are handled here. Currently its for renewing the lease time |
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185 * where client passes in a required timeout |
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186 * @see CDHCPControl::HandleClientRequestL |
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187 * |
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188 * @internalTechnology |
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189 */ |
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190 { |
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191 TBool deferAllowed = !iMessage; |
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192 TBool defer = EFalse; |
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193 |
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194 defer = CDHCPControl::HandleClientRequestL(aName, aValue); |
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195 |
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196 if (aName == KConnAddrRenew && iState == ERenewInProgress && deferAllowed) |
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197 {//Rebind timeout |
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198 TTimeIntervalSeconds timeOut; |
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199 if(aValue > 0) |
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200 { |
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201 timeOut = aValue; |
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202 } |
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203 else |
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204 { |
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205 timeOut = (DhcpStateMachine()->iRebindTimeT2 - DhcpStateMachine()->iRenewalTimeT1 + 1); |
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206 } |
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207 iTimer->After(timeOut, *this); |
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208 defer = ETrue; |
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209 } |
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210 |
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211 return defer; |
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212 } |
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213 |
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214 TInt CDHCPIP4Control::HandleClientRequestL(TUint aName) |
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215 /** |
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216 * Handles client requests specific for IP4 |
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217 * |
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218 * @see CDHCPControl::HandleClientRequestL |
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219 * @internalTechnology |
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220 */ |
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221 { |
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222 return CDHCPIP4Control::HandleClientRequestL(aName,0); |
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223 } |
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224 |
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225 /** |
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226 Get raw option data (IP4 version). |
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227 @param pointer to the buffer descriptor for getting option data |
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228 */ |
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229 void CDHCPIP4Control::HandleGetRawOptionDataL(TDes8* aDes) |
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230 { |
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231 TDhcp4RawOptionDataPckg pckg(*aDes); |
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232 |
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233 TUint8 opCode = pckg.OpCode(); |
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234 TPtr8 buf(pckg.Buf()); |
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235 GetRawOptionDataL(opCode, buf); |
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236 #ifdef SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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237 if (!iDhcpStateMachine->iDhcpInformAckPending) |
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238 { |
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239 #endif // SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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240 pckg.SetBufLengthL(buf.Length()); |
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241 #ifdef SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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242 } |
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243 #endif // SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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244 } |
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245 |
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246 void CDHCPIP4Control::TaskCompleteL( TInt aError ) |
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247 /** |
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248 * TaskCompleteL function |
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249 * |
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250 * if this method returns ETrue then aStateMachine deletes itself. |
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251 * In this case it does not ever return ETrue. |
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252 * Called upon completion or when suspended. |
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253 * |
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254 * @see CStateMachine::iSuspendRequest comment |
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255 * @internalTechnology |
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256 */ |
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257 { |
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258 // In response to the initialisation operation timing out, |
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259 // try to create a link local to allow local addressing (may |
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260 // not be supported by current interface's IPv4 link local |
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261 // option). |
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262 if( ( aError == KErrTimedOut ) && |
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263 ( iState == EInitInProgress ) && |
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264 !iStaticAddress && |
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265 iDhcpConfigListener && |
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266 !iDhcpConfigListener->HaveLinkLocal() ) |
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267 { |
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268 if( DhcpStateMachine()->CreateIPv4LinkLocal() == KErrNone ) |
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269 { |
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270 iClientShouldCompleteWhenLinkLocalCreated = ETrue; |
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271 //Link Local Address has been taken & return here itself |
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272 CDHCPControl::TaskCompleteL(aError); |
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273 return; |
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274 } |
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275 } |
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276 if((DhcpStateMachine()->iRetryDhcpIpCount >= KDHCPv4MaxRetryCount) && iState == EDeclineInProgress ) |
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277 { |
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278 if( DhcpStateMachine()->CreateIPv4LinkLocal() == KErrNone ) |
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279 { |
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280 iClientShouldCompleteWhenLinkLocalCreated = ETrue; |
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281 //Link Local Address has been taken & return here itself |
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282 CDHCPControl::TaskCompleteL(KErrNone); |
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283 return; |
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284 } |
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285 |
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286 } |
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287 // Call the base class. |
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288 CDHCPControl::TaskCompleteL( aError ); |
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289 } |
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290 |
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291 void CDHCPIP4Control::LinkLocalCreated() |
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292 /** |
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293 * LinkLocalCreated function |
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294 * |
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295 * If iClientShouldCompleteWhenLinkLocalCreated is ETrue we need to complete the |
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296 * client messages as the link local has been created and the interface is now |
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297 * ready for use. |
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298 * |
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299 * @internalTechnology |
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300 */ |
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301 { |
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302 if( iClientShouldCompleteWhenLinkLocalCreated ) |
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303 { |
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304 iClientShouldCompleteWhenLinkLocalCreated = EFalse; |
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305 |
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306 CompleteClientConfigureMessage(KErrNone); |
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307 // don't complete any outstanding ioctl yet.. |
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308 } |
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309 } |
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310 |
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311 void CDHCPIP4Control::GetRawOptionDataL(TUint aOpCode, TPtr8& aPtr) |
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312 { |
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313 #ifdef SYMBIAN_NETWORKING_DHCPSERVER |
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314 if(iValidMsg.Length()==0 && iDHCPServerImpl) |
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315 { |
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316 GetRawOptionDataFromDNSBufL(aPtr); |
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317 return; |
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318 } |
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319 #endif // SYMBIAN_NETWORKING_DHCPSERVER |
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320 HBufC8* buf = NULL; |
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321 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
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322 CleanupClosePushL(msg); |
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323 TPtr8 ptr( const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length() ); |
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324 msg.iRecord.ParseL(ptr); //no check necessary |
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325 DHCPv4::COptionNode* pOption = msg.iOptions.FindOption(static_cast<TUint8>(aOpCode)); |
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326 if (!pOption) |
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327 { |
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328 #ifdef SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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329 CleanupStack::PopAndDestroy(); |
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330 TUint8 tempOpt=aOpCode; |
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331 TPtr8 optPtr(&tempOpt,1,1); |
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332 return(RequestInformOrCompleteCallL(optPtr)); |
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333 #else |
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334 User::Leave(KErrNotFound); |
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335 #endif // SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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336 } |
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337 ptr.Set(pOption->GetBodyDes()); |
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338 if (ptr.Length() > aPtr.MaxLength()) |
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339 { |
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340 User::Leave(KErrOverflow); |
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341 } |
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342 aPtr.Copy(ptr); |
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343 CleanupStack::PopAndDestroy(); |
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344 } |
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345 |
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346 #ifdef SYMBIAN_NETWORKING_DHCPSERVER |
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347 |
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348 void CDHCPIP4Control::GetRawOptionDataFromDNSBufL(TPtr8& aPtr) |
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349 { |
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350 if(iValidMsg.Length() == 0) |
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351 { |
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352 if (iDNSRawOption->Des().Length() > aPtr.MaxLength()) |
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353 { |
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354 User::Leave(KErrOverflow); |
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355 } |
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356 aPtr.Copy(iDNSRawOption->Des()); |
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357 } |
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358 } |
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359 |
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360 void CDHCPIP4Control::HandleSetRawOptionCodeL(TDes8* aDes) |
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361 { |
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362 if(iValidMsg.Length() == 0) |
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363 { |
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364 iDNSRawOption = HBufC8::NewL(aDes->Length()); |
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365 iDNSRawOption->Des() = *aDes; |
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366 } |
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367 else |
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368 { |
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369 SetRawOptionCodeL(aDes); |
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370 } |
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371 } |
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372 |
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373 void CDHCPIP4Control::SetRawOptionCodeL(TDes8* aDes) |
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374 { |
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375 HBufC8* buf = NULL; |
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376 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
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377 CleanupClosePushL(msg); |
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378 TPtr8 ptr( const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length() ); |
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379 msg.iRecord.ParseL(ptr); //no check necessary |
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380 |
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381 TDhcp4RawOptionDataPckg pckg(*aDes); |
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382 DHCPv4::TDHCPOptionCodes opcode = static_cast<DHCPv4::TDHCPOptionCodes>(pckg.OpCode()); |
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383 |
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384 DHCPv4::COptionNode* pOption = msg.iOptions.FindOption(opcode); |
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385 if (!pOption) |
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386 { |
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387 User::Leave(KErrNotFound); |
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388 } |
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389 |
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390 TPtr8 ptr2(reinterpret_cast<TUint8*>(aDes),aDes->Length()); |
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391 |
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392 pOption->SetBody(ptr2); |
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393 CleanupStack::PopAndDestroy(); // msg |
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394 } |
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395 #endif // SYMBIAN_NETWORKING_DHCPSERVER |
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396 |
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397 void CDHCPIP4Control::HandleGetSipServerAddrL(TDes8* aDes) |
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398 { |
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399 if (aDes->Length() < static_cast<TInt>(sizeof(SSipServerAddr))) |
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400 { |
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401 User::Leave(KErrArgument); |
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402 } |
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403 |
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404 SSipServerAddr* sipServerAddr = |
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405 reinterpret_cast<SSipServerAddr*>(const_cast<TUint8*>(aDes->Ptr())); |
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406 |
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407 HBufC8* buf = NULL; |
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408 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
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409 CleanupClosePushL(msg); |
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410 TPtr8 ptr(const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length()); |
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411 msg.iRecord.ParseL(ptr); |
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412 DHCPv4::COptionNode* sipServerOption = msg.iOptions.FindOption(DHCPv4::EDHCPSIPServers); |
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413 |
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414 if(sipServerOption) |
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415 { |
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416 TUint8* headerPtr = sipServerOption->Ptr(); |
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417 |
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418 TUint encoding = headerPtr[DHCPv4::KDhcpSipEncodingOffset]; |
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419 TUint length = headerPtr[DHCPv4::KDhcpSipLengthOffset]; |
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420 |
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421 if(encoding != DHCPv4::KDhcpSipEncodingAddresses) |
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422 { |
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423 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("HandleGetSipServerAddrL: Client trying to fetch a SIP address when only a SIP domain is known"))); |
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424 User::Leave( KErrNotFound ); |
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425 } |
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426 if((TUint)sipServerAddr->index >= (length / KIp4AddrByteLength)) |
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427 { |
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428 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("HandleGetSipServerAddrL: Client tried to fetch an out-of-range SIP address %d (I only know about %d)"),(TUint)sipServerAddr->index, (length / KIp4AddrByteLength))); |
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429 User::Leave( KErrNotFound ); |
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430 } |
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431 |
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432 TUint addrOffset = sipServerAddr->index * KIp4AddrByteLength; |
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433 |
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434 TUint8* bodyPtr = sipServerOption->GetBodyPtr(); |
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435 TUint32 copiedValue; |
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436 // Grab ip address from option body at given offset, +1 used to skip the encoding boolean used for sip |
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437 Mem::Copy(&copiedValue,(bodyPtr + addrOffset+1),4); |
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438 // swap around ip address as in BigEndian form |
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439 copiedValue = ByteOrder::Swap32(copiedValue); |
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440 sipServerAddr->address.SetAddress(copiedValue); |
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441 } |
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442 else |
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443 { |
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444 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("HandleGetSipServerAddrL: Client tried to fetch a SIP option but none has (yet) been received"))); |
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445 User::Leave(KErrNotFound); |
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446 } |
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447 CleanupStack::PopAndDestroy(); |
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448 } |
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449 |
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450 #ifdef SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
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451 void CDHCPIP4Control::GetDhcpHdrSiaddrL(TDes8& aNxtAddress) |
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452 /** |
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453 * The GetDhcpHdrSiaddr function |
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454 * |
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455 * Fetches the Siaddr |
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456 * |
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457 * @param aNxtAddress Next server IPAddress fetched from the DHCP Server |
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458 * @internalTechnology |
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459 */ |
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460 { |
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461 if (aNxtAddress.Length() < static_cast<TInt>(sizeof(TConnectionAddress))) |
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462 { |
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463 User::Leave(KErrArgument); |
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464 } |
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465 TConnectionAddress* ptr = (TConnectionAddress*)aNxtAddress.Ptr(); |
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466 TInetAddr* addrPtr = new(&(ptr->iAddr))TInetAddr; |
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467 //ptr->iAddr is just some memory in aDes. There is no guarantee that it will be a |
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468 //valid TInetAddr (or even a valid TDes) so what we do here is just run a constructor |
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469 //on this already valid memory block and we are now guaranteed to have a valid |
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470 //TInetAddr - NO MEMORY IS ACTUALLY ALLOCATED BY NEW HERE - see base code for more |
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471 //details |
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472 |
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473 //Parse the iValidMsg |
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474 HBufC8* buf = NULL; |
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475 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
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476 CleanupClosePushL(msg); |
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477 TPtr8 msgPtr(const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length()); |
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478 msg.iRecord.ParseL(msgPtr); |
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479 |
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480 //Extract the server address |
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481 addrPtr->SetAddress(msg.GetSIAddr()); |
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482 |
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483 CleanupStack::PopAndDestroy(); |
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484 } |
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485 |
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486 void CDHCPIP4Control::GetDhcpHdrSnameL(TDes8& aHdrSvrName) |
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487 /** |
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488 * The GetDhcpHdrSname function |
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489 * |
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490 * Fetches the Sname |
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491 * |
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492 * @param aHdrSvrName Next server name fetched from the DHCP Server. |
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493 * @internalTechnology |
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494 */ |
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495 { |
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496 HBufC8* buf = NULL; |
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497 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
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498 CleanupClosePushL(msg); |
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499 TPtr8 ptr(const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length()); |
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500 msg.iRecord.ParseL(ptr); |
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501 if (msg.GetSName().Length() > aHdrSvrName.MaxLength()) |
|
502 { |
|
503 User::Leave(KErrOverflow); |
|
504 } |
|
505 aHdrSvrName=msg.GetSName(); |
|
506 //SetLength otherwise received string length will be 64 by default, truncate to end of string. |
|
507 aHdrSvrName.SetLength(aHdrSvrName.Locate('\0')); |
|
508 |
|
509 CleanupStack::PopAndDestroy(&msg); |
|
510 } |
|
511 |
|
512 void CDHCPIP4Control::HandleGetTftpServerAddrL(TDes8& aDes) |
|
513 /** |
|
514 * The HandleGetTftpServerAddrL function |
|
515 * |
|
516 * Fetches the Tftp Server Address |
|
517 * @param aDes Buffer returned contains a list of ip addresses each of 4 bytes. |
|
518 * |
|
519 * @internalTechnology |
|
520 */ |
|
521 { |
|
522 if (aDes.Length() < static_cast<TInt>(sizeof(STftpServerAddr))) |
|
523 { |
|
524 User::Leave(KErrArgument); |
|
525 } |
|
526 |
|
527 STftpServerAddr* tftpServerAddr = |
|
528 reinterpret_cast<STftpServerAddr*>(const_cast<TUint8*>(aDes.Ptr())); |
|
529 |
|
530 HBufC8* buf = NULL; |
|
531 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
|
532 CleanupClosePushL(msg); |
|
533 TPtr8 ptr(const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length()); |
|
534 msg.iRecord.ParseL(ptr); |
|
535 DHCPv4::COptionNode* tftpServerOption = msg.iOptions.FindOption(DHCPv4::EDHCPTftpServers); |
|
536 if(tftpServerOption) |
|
537 { |
|
538 |
|
539 TUint8 len=tftpServerOption->GetItemLength()-2;//subtract 2 bytes becz length include message opcode and message opcode length |
|
540 |
|
541 TUint addrOffset = tftpServerAddr->index * KIp4AddrByteLength; |
|
542 |
|
543 if (addrOffset>len) |
|
544 { |
|
545 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("HandleGetTftpServerAddrL: Client tried to fetch a invalid index of Tftp Address which is not present"))); |
|
546 iDhcpStateMachine->iDhcpInformAckPending=EFalse; |
|
547 User::Leave(KErrNotFound); |
|
548 |
|
549 } |
|
550 |
|
551 TUint8* bodyPtr = tftpServerOption->GetBodyPtr(); |
|
552 |
|
553 TUint32 copiedValue; |
|
554 // Grab ip address from option body at given offset. |
|
555 Mem::Copy(&copiedValue,(bodyPtr + addrOffset),4); |
|
556 // swap around ip address as in BigEndian form/ copiedValue = ByteOrder::Swap32(copiedValue); |
|
557 copiedValue = ByteOrder::Swap32(copiedValue); |
|
558 tftpServerAddr->address.SetAddress(copiedValue); |
|
559 } |
|
560 else //check inform to be made or not..or return |
|
561 { |
|
562 CleanupStack::PopAndDestroy(); //pop buffer ..we are going to return immediately |
|
563 TUint8 opt=DHCPv4::EDHCPTftpServers; |
|
564 TPtr8 optPtr(&opt,1,1); |
|
565 return(RequestInformOrCompleteCallL(optPtr)); |
|
566 } |
|
567 iDhcpStateMachine->iDhcpInformAckPending=EFalse; |
|
568 CleanupStack::PopAndDestroy(); |
|
569 |
|
570 } |
|
571 |
|
572 void CDHCPIP4Control::HandleGetTftpServerNameL(TDes8& aTftpSvrName) |
|
573 /** |
|
574 * The HandleGetTftpServerName function |
|
575 * |
|
576 * Fetches the Tftp Server Name |
|
577 * |
|
578 * @param aTftpSvrName Tftp Server Name fetched from the DHCP Server. |
|
579 * @internalTechnology |
|
580 */ |
|
581 { |
|
582 HBufC8* buf = NULL; |
|
583 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
|
584 CleanupClosePushL(msg); |
|
585 TPtr8 ptr(const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length()); |
|
586 msg.iRecord.ParseL(ptr); |
|
587 DHCPv4::COptionNode* tftpOption = msg.iOptions.FindOption(DHCPv4::EDHCPTftpServerName); |
|
588 if(tftpOption) |
|
589 { |
|
590 if (aTftpSvrName.MaxLength()<tftpOption->GetItemLength()) |
|
591 { |
|
592 iDhcpStateMachine->iDhcpInformAckPending=EFalse; |
|
593 User::Leave(KErrOverflow); |
|
594 } |
|
595 else |
|
596 { |
|
597 aTftpSvrName.Copy(tftpOption->GetBodyDes()); |
|
598 } |
|
599 } |
|
600 else |
|
601 { |
|
602 //To check if DHCP Sname Option is overloaded |
|
603 tftpOption = msg.iOptions.FindOption(DHCPv4::EDHCPOptionOverload); |
|
604 if(tftpOption) |
|
605 { |
|
606 if( msg.iOptions.GetOptionOverload() == DHCPv4::EDHCPSname) |
|
607 { |
|
608 GetDhcpHdrSnameL(aTftpSvrName); |
|
609 } |
|
610 } |
|
611 else//now issue Inform Request for option 66 or return now.. |
|
612 { |
|
613 CleanupStack::PopAndDestroy(); //pop buffer ..we are going to return immediately |
|
614 TUint8 opt=DHCPv4::EDHCPTftpServerName; |
|
615 TPtr8 optPtr(&opt,1,1); |
|
616 return(RequestInformOrCompleteCallL(optPtr)); |
|
617 } |
|
618 } |
|
619 iDhcpStateMachine->iDhcpInformAckPending=EFalse; |
|
620 CleanupStack::PopAndDestroy(); |
|
621 } |
|
622 |
|
623 void CDHCPIP4Control::RequestInformOrCompleteCallL(TPtr8& aOpcodePtr) |
|
624 /** |
|
625 * The RequestInformOrCompleteCallL function |
|
626 * |
|
627 * Checks DHCPINFORM message should be sent or not |
|
628 * @param aOpcodePtr pointer to the opcode list to be updated in iSavedExtraParameters |
|
629 * @internalTechnology |
|
630 */ |
|
631 { |
|
632 |
|
633 if (!iDhcpStateMachine->iDhcpInformAckPending) |
|
634 { |
|
635 if (!iDhcpStateMachine->iSavedExtraParameters.Length()) |
|
636 { |
|
637 iDhcpStateMachine->iSavedExtraParameters.CreateL(aOpcodePtr); |
|
638 } |
|
639 else |
|
640 { |
|
641 iDhcpStateMachine->iSavedExtraParameters.ReAllocL(iDhcpStateMachine->iSavedExtraParameters.Length()+aOpcodePtr.Length()); |
|
642 iDhcpStateMachine->iSavedExtraParameters.Append(aOpcodePtr); |
|
643 } |
|
644 |
|
645 static_cast<CDHCPIP4StateMachine*>(iDhcpStateMachine)->StartInformL( this ); |
|
646 iDhcpStateMachine->iDhcpInformAckPending=ETrue; |
|
647 iState = EInformInProgress; |
|
648 } |
|
649 else |
|
650 { |
|
651 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8(" RequestInformOrCompleteCallL::Client tried to fetch a option but none has (yet) been received"))); |
|
652 iDhcpStateMachine->iDhcpInformAckPending=EFalse; |
|
653 User::Leave(KErrNotFound); |
|
654 } |
|
655 } |
|
656 |
|
657 |
|
658 |
|
659 void CDHCPIP4Control::HandleGetMultipleParamsL(TDes8& aDes) |
|
660 /** |
|
661 * The HandleGetMultipleParamsL function |
|
662 * |
|
663 * Fetches the required raw option parameter buffer. |
|
664 * Buffer contains list of parameter options followed by msg opcode, len, data.. |
|
665 * If any of the parameters are not found, DHCPINFORM message will be sent. |
|
666 * Filled Returned Buffer is as shown in fig.. |
|
667 * @code |
|
668 * ----------------------------------------------------- |
|
669 * |No of | |Data | | |Data | | |
|
670 * |OpCode|OP1 |length1|Data1 | OP2 |Length2|Data2 | |
|
671 * | | | | | | | | |
|
672 * ----------------------------------------------------- |
|
673 * @endcode |
|
674 * @param aDes Pointer to the buffer descriptor for getting option data |
|
675 * @internalTechnology |
|
676 */ |
|
677 { |
|
678 HBufC8 *saveBuf=NULL, *buffer=NULL; |
|
679 TUint8 *headerPtr; |
|
680 TInt numOfOpcodes=0; |
|
681 TInt totalLength=0,opcodeLength=aDes.Length(); |
|
682 TInt maxLength=aDes.MaxLength(); |
|
683 TUint8 opcode; |
|
684 TBool allFound=ETrue; |
|
685 |
|
686 DHCPv4::CDHCPMessageHeaderIP4 msgSaved(saveBuf); |
|
687 TPtr8 savedPtr(const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length()); |
|
688 CleanupClosePushL(msgSaved); |
|
689 msgSaved.iRecord.ParseL(savedPtr); |
|
690 |
|
691 |
|
692 //The below for loop checks all the required opcode data is present or not |
|
693 //The message opcode data is not present in the iValidMsg buffer,the corresponding |
|
694 //opcodes are stored in iCurrentParameters for sending it in DHCPINFORM message |
|
695 for(TInt i=0;i<opcodeLength;i++) |
|
696 { |
|
697 opcode=*(aDes.Ptr()+i); //search required opcode is present or not, one by one |
|
698 DHCPv4::COptionNode* findNode = msgSaved.iOptions.FindOption(opcode); |
|
699 if (findNode ) |
|
700 { |
|
701 TInt bufLength=findNode->GetItemLength(); |
|
702 totalLength+=bufLength; |
|
703 if ((totalLength+1) > maxLength) |
|
704 { |
|
705 totalLength-=bufLength; |
|
706 continue; //current buffer is too big..so hope next buffer is small |
|
707 } |
|
708 if (!buffer) |
|
709 { |
|
710 buffer=HBufC8::NewLC(totalLength + 1);//+1 is extra byte to store number of opcodes |
|
711 buffer->Des().Append(KNoChar); |
|
712 } |
|
713 else |
|
714 { |
|
715 buffer=buffer->ReAllocL(totalLength + 1); |
|
716 CleanupStack::Pop();//buffer as ptr address has changed |
|
717 CleanupStack::PushL(buffer); |
|
718 } |
|
719 headerPtr = findNode->Ptr(); |
|
720 ++numOfOpcodes; |
|
721 buffer->Des().Append(headerPtr,bufLength); |
|
722 } |
|
723 else |
|
724 { |
|
725 //If atleast one opcode, among the requested, is not found then request through |
|
726 //DHCP INFORM message by calling RequestInformOrCompleteCallL |
|
727 allFound=EFalse; |
|
728 } |
|
729 } |
|
730 |
|
731 if (allFound ) //everything is present..just return call now itself.. |
|
732 { |
|
733 if ((totalLength + 1) > maxLength) |
|
734 { |
|
735 User::Leave(KErrOverflow); |
|
736 } |
|
737 if(buffer) // buffer would be NULL only when aDes.Length = 0 which is a rare scenario. But still check it to avoid NULL pointer dereference. |
|
738 { |
|
739 aDes.Copy(buffer->Ptr(), buffer->Length()); |
|
740 TBuf8<1> dummy; |
|
741 dummy.FillZ(1); |
|
742 dummy[0]=numOfOpcodes; |
|
743 aDes.Replace(0,1,dummy);//update number of opcodes collected |
|
744 } |
|
745 } |
|
746 else |
|
747 { |
|
748 TPtr8 opcodePtr(const_cast<TUint8*>(aDes.Ptr()),opcodeLength); |
|
749 opcodePtr.SetLength(opcodeLength); |
|
750 RequestInformOrCompleteCallL(opcodePtr); |
|
751 } |
|
752 |
|
753 if (buffer) |
|
754 { |
|
755 CleanupStack::PopAndDestroy(buffer); |
|
756 } |
|
757 |
|
758 CleanupStack::PopAndDestroy(&msgSaved); |
|
759 |
|
760 } |
|
761 |
|
762 |
|
763 TInt CDHCPIP4Control::InformCompleteRequestHandlerL() |
|
764 /** |
|
765 * The InformCompleteRequestHandlerL function |
|
766 * |
|
767 * The function will be called after the DHCPACK message is received, and |
|
768 * iValidMsg buffer has been updated. |
|
769 * Looks for the requested options present or not and appropriately calls |
|
770 * the function handlers |
|
771 * |
|
772 * @return KErrNone if the required data option is found else corresponding error code. |
|
773 * @internalTechnology |
|
774 */ |
|
775 { |
|
776 |
|
777 TUint optionName = iMessage->Int1(); |
|
778 TInt length = iMessage->Int3(); |
|
779 |
|
780 HBufC8 *buff=HBufC8::NewMaxLC(length) ; |
|
781 TPtr8 ptr(buff->Des()); |
|
782 iMessage->ReadL(2, ptr); |
|
783 |
|
784 |
|
785 switch(optionName) |
|
786 { |
|
787 case KConnGetDhcpRawOptionData: |
|
788 { |
|
789 HandleGetRawOptionDataL(&ptr); |
|
790 iMessage->WriteL(2,ptr); |
|
791 break; |
|
792 } |
|
793 |
|
794 case KConnDhcpGetMultipleParams : |
|
795 { |
|
796 HandleGetMultipleParamsL(ptr); |
|
797 iMessage->WriteL(2,ptr); |
|
798 break; |
|
799 } |
|
800 |
|
801 case KConnGetTftpServerAddr: |
|
802 { |
|
803 HandleGetTftpServerAddrL(ptr); |
|
804 iMessage->WriteL(2,ptr); |
|
805 break; |
|
806 } |
|
807 |
|
808 case KConnGetTftpServerName: |
|
809 { |
|
810 HandleGetTftpServerNameL(ptr); |
|
811 iMessage->WriteL(2,ptr); |
|
812 break; |
|
813 } |
|
814 |
|
815 default: |
|
816 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("InformCompleteRequestHandlerL : default unhandled optino Name"))); |
|
817 break; |
|
818 |
|
819 } |
|
820 iDhcpStateMachine->iDhcpInformAckPending=EFalse; |
|
821 CleanupStack::PopAndDestroy(buff); |
|
822 return KErrNone; |
|
823 |
|
824 } |
|
825 #endif//SYMBIAN_NETWORKING_DHCP_MSG_HEADERS |
|
826 |
|
827 |
|
828 void CDHCPIP4Control::HandleGetSipServerDomainL(TDes8* aDes) |
|
829 { |
|
830 if (aDes->Length() < static_cast<TInt>(sizeof(SSipServerDomain))) |
|
831 { |
|
832 User::Leave(KErrArgument); |
|
833 } |
|
834 |
|
835 SSipServerDomain* sipServerDomain = |
|
836 reinterpret_cast<SSipServerDomain*>(const_cast<TUint8*>(aDes->Ptr())); |
|
837 |
|
838 HBufC8* buf = NULL; |
|
839 DHCPv4::CDHCPMessageHeaderIP4 msg(buf); |
|
840 CleanupClosePushL(msg); |
|
841 TPtr8 ptr(const_cast<TUint8*>(iValidMsg.Ptr()), iValidMsg.Length(), iValidMsg.Length()); |
|
842 msg.iRecord.ParseL(ptr); |
|
843 DHCPv4::COptionNode* sipServerOption = msg.iOptions.FindOption(DHCPv4::EDHCPSIPServers); |
|
844 |
|
845 if(sipServerOption) |
|
846 { |
|
847 TUint8* headerPtr = sipServerOption->Ptr(); |
|
848 |
|
849 TUint encoding = headerPtr[DHCPv4::KDhcpSipEncodingOffset]; |
|
850 |
|
851 if(encoding != DHCPv4::KDhcpSipEncodingDomains) |
|
852 { |
|
853 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("HandleGetSipServerDomainL: Client trying to fetch a SIP domain when only a SIP address is known"))); |
|
854 User::Leave( KErrNotFound ); |
|
855 } |
|
856 |
|
857 CDomainNameCodec* domainNameDecoder = new(ELeave) CDomainNameCodec(); |
|
858 CleanupStack::PushL(domainNameDecoder); |
|
859 TPtr8 ptr = sipServerOption->GetBodyDes(); |
|
860 ptr.Set((TUint8*)(ptr.Ptr()+1),ptr.Length()-1,ptr.MaxLength()-1); |
|
861 domainNameDecoder->DecodeL(ptr); |
|
862 |
|
863 if(sipServerDomain->index < (TInt)domainNameDecoder->NumDomainNames()) |
|
864 { |
|
865 TDomainName domainName = (*domainNameDecoder)[sipServerDomain->index]; |
|
866 sipServerDomain->domainName.Copy(domainName); |
|
867 } |
|
868 else |
|
869 { |
|
870 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("HandleGetSipServerDomainL: Client tried to fetch an out-of-range SIP domain %d (I only know about %d)"), sipServerDomain->index , (TInt)domainNameDecoder->NumDomainNames())); |
|
871 User::Leave(KErrNotFound); |
|
872 } |
|
873 |
|
874 CleanupStack::PopAndDestroy(); |
|
875 } |
|
876 else |
|
877 { |
|
878 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("HandleGetSipServerDomainL: Client tried to fetch a SIP option but none has (yet) been received"))); |
|
879 User::Leave(KErrNotFound); |
|
880 } |
|
881 CleanupStack::PopAndDestroy(); |
|
882 } |
|
883 |
|
884 |
|
885 |
|
886 TBool CDHCPIP4Control::ShouldInformAfterFailedInit(void) |
|
887 { |
|
888 // if has no global address, should not inform |
|
889 return iDhcpStateMachine->GetInterfaceGlobalAddress().IsUnspecified() ? EFalse : ETrue ; |
|
890 } |
|
891 |