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1 // Copyright (c) 2010 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 the License "Symbian Foundation 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.symbianfoundation.org/legal/sfl-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 // |
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15 |
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16 #include <bluetooth/logger.h> |
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17 |
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18 #include "encryptionkeyrefreshhelper.h" |
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19 #include "hcifacade.h" |
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20 #include "linkmgr.h" |
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21 |
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22 #ifdef __FLOG_ACTIVE |
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23 _LIT8(KLogComponent, LOG_COMPONENT_LINKMGR); |
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24 #endif |
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25 |
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26 CEncryptionKeyRefresher::CEncryptionKeyRefresher(CPhysicalLinksManager& aLinkMgr, CPhysicalLink& aLink) |
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27 : CPhysicalLinkHelper(aLinkMgr, aLink) |
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28 { |
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29 LOG_FUNC |
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30 } |
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31 |
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32 CEncryptionKeyRefresher* CEncryptionKeyRefresher::NewL(CPhysicalLinksManager& aLinkMgr, CPhysicalLink& aLink) |
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33 { |
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34 LOG_STATIC_FUNC |
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35 CEncryptionKeyRefresher* self = new(ELeave) CEncryptionKeyRefresher(aLinkMgr, aLink); |
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36 CleanupStack::PushL(self); |
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37 self->ConstructL(); |
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38 CleanupStack::Pop(self); |
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39 return self; |
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40 } |
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41 |
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42 void CEncryptionKeyRefresher::ConstructL() |
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43 { |
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44 LOG_FUNC |
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45 |
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46 BaseConstructL(); |
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47 |
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48 iStateFactory = CEncryptionKeyRefresherStateFactory::NewL(); |
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49 iState = &(iStateFactory->GetState(CEncryptionKeyRefresherStateFactory::EIdle)); |
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50 } |
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51 |
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52 CEncryptionKeyRefresher::~CEncryptionKeyRefresher() |
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53 { |
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54 LOG_FUNC |
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55 } |
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56 |
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57 void CEncryptionKeyRefresher::EncryptionKeyRefreshComplete(TInt aError) |
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58 { |
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59 LOG_FUNC |
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60 iState->EncryptionKeyRefreshComplete(*this, aError); |
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61 } |
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62 |
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63 void CEncryptionKeyRefresher::TimerExpired() |
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64 { |
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65 LOG_FUNC |
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66 iState->TimerExpired(*this); |
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67 } |
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68 |
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69 void CEncryptionKeyRefresher::HandleError( TInt aError) |
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70 { |
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71 LOG_FUNC |
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72 iState->Error(*this, aError); |
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73 } |
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74 |
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75 void CEncryptionKeyRefresher::StartHelper() |
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76 { |
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77 LOG_FUNC |
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78 iState->Start(*this); |
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79 } |
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80 |
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81 void CEncryptionKeyRefresher::EventReceived(TBTBasebandEventNotification& aEvent) |
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82 { |
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83 LOG_FUNC |
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84 iState->EventReceived(*this, aEvent); |
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85 } |
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86 |
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87 |
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88 //---------------------------------------------------------------------------------- |
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89 // STATE FACTORY |
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90 //---------------------------------------------------------------------------------- |
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91 |
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92 CEncryptionKeyRefresherStateFactory* CEncryptionKeyRefresherStateFactory::NewL() |
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93 { |
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94 LOG_STATIC_FUNC |
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95 CEncryptionKeyRefresherStateFactory* ret=new (ELeave) CEncryptionKeyRefresherStateFactory(); |
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96 CleanupStack::PushL(ret); |
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97 ret->ConstructL(); |
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98 CleanupStack::Pop(ret); |
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99 return ret; |
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100 } |
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101 |
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102 void CEncryptionKeyRefresherStateFactory::ConstructL() |
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103 { |
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104 LOG_FUNC |
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105 iStates[EIdle] =new (ELeave) TEkrStateIdle(*this); |
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106 iStates[EDisablingLPM] =new (ELeave) TEkrStateDisablingLPM(*this); |
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107 iStates[ERefreshingKey] =new (ELeave) TEkrStateRefreshingKey(*this); |
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108 } |
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109 |
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110 CEncryptionKeyRefresherStateFactory::CEncryptionKeyRefresherStateFactory() |
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111 { |
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112 LOG_FUNC |
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113 iStates.DeleteAll(); |
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114 } |
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115 |
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116 const TEncryptionKeyRefresherState& CEncryptionKeyRefresherStateFactory::GetState(CEncryptionKeyRefresherStateFactory::TEncryptionKeyRefresherStates aState) const |
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117 { |
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118 LOG_FUNC |
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119 __ASSERT_DEBUG(iStates[aState], Panic(EEncryptionKeyRefresherInvalidState)); |
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120 return *iStates[aState]; |
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121 } |
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122 |
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123 TInt CEncryptionKeyRefresherStateFactory::StateIndex(const TEncryptionKeyRefresherState* aState) const |
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124 { |
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125 LOG_FUNC |
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126 TInt state; |
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127 for (state = 0; state < EEncryptionKeyRefresherMaxState; state++) |
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128 { |
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129 if (iStates[state] == aState) |
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130 { |
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131 return state; |
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132 } |
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133 } |
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134 |
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135 return KUnknownState; |
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136 } |
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137 |
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138 |
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139 //---------------------------------------------------------------------------------- |
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140 // STATES |
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141 //---------------------------------------------------------------------------------- |
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142 |
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143 TEncryptionKeyRefresherState::TEncryptionKeyRefresherState(CEncryptionKeyRefresherStateFactory& aFactory) |
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144 : iFactory(aFactory) |
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145 { |
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146 LOG_FUNC |
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147 } |
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148 |
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149 void TEncryptionKeyRefresherState::PanicInState(TLinkPanic aPanic) const |
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150 { |
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151 LOG_FUNC |
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152 Panic(aPanic, iFactory.StateIndex(this)); |
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153 } |
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154 |
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155 void TEncryptionKeyRefresherState::ChangeState(CEncryptionKeyRefresher& aContext, CEncryptionKeyRefresherStateFactory::TEncryptionKeyRefresherStates aState) const |
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156 { |
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157 LOG_FUNC |
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158 |
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159 aContext.iState->Exit(aContext); |
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160 |
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161 #ifdef __FLOG_ACTIVE |
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162 const TEncryptionKeyRefresherState* state=&iFactory.GetState(aState); |
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163 LOG2(_L("EncryptionKeyRefresher: State %S -> %S"), &aContext.iState->iName, &state->iName); |
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164 #endif //__FLOG_ACTIVE |
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165 aContext.iState=&iFactory.GetState(aState); |
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166 |
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167 aContext.iState->Enter(aContext); |
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168 } |
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169 |
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170 void TEncryptionKeyRefresherState::Enter(CEncryptionKeyRefresher& /*aContext*/) const |
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171 { |
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172 LOG_FUNC |
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173 // do nothing |
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174 } |
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175 |
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176 void TEncryptionKeyRefresherState::Exit(CEncryptionKeyRefresher& /*aContext*/) const |
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177 { |
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178 LOG_FUNC |
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179 // do nothing |
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180 } |
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181 |
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182 void TEncryptionKeyRefresherState::Start(CEncryptionKeyRefresher& /*aContext*/) const |
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183 { |
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184 LOG_FUNC |
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185 PanicInState(EEncryptionKeyRefresherStateMachineInvalidEvent); |
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186 } |
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187 |
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188 void TEncryptionKeyRefresherState::Error(CEncryptionKeyRefresher& aContext, TInt /*aErr*/) const |
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189 { |
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190 LOG_FUNC |
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191 aContext.CancelNotify(); |
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192 aContext.RemoveTimer(); |
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193 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::EIdle); |
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194 } |
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195 |
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196 void TEncryptionKeyRefresherState::EventReceived(CEncryptionKeyRefresher& /*aContext*/, TBTBasebandEventNotification& /*aEvent*/) const |
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197 { |
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198 LOG_FUNC |
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199 // do nothing |
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200 } |
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201 |
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202 void TEncryptionKeyRefresherState::TimerExpired(CEncryptionKeyRefresher& aContext) const |
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203 { |
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204 LOG_FUNC |
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205 aContext.CancelNotify(); |
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206 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::EIdle); |
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207 } |
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208 |
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209 void TEncryptionKeyRefresherState::EncryptionKeyRefreshComplete(CEncryptionKeyRefresher& /*aContext*/, TInt /*aError*/) const |
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210 { |
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211 LOG_FUNC |
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212 // do nothing |
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213 } |
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214 |
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215 //---------------------------------------------------------------------------------- |
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216 |
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217 TEkrStateIdle::TEkrStateIdle(CEncryptionKeyRefresherStateFactory& aFactory) |
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218 : TEncryptionKeyRefresherState(aFactory) |
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219 { |
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220 LOG_FUNC |
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221 STATENAME("TEkrStateIdle"); |
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222 } |
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223 |
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224 void TEkrStateIdle::Start(CEncryptionKeyRefresher& aContext) const |
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225 { |
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226 LOG_FUNC |
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227 aContext.QueueTimer(KTimeoutEncryptionKeyRefresh); // watchdog timer |
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228 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::EDisablingLPM); |
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229 } |
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230 |
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231 void TEkrStateIdle::Enter(CEncryptionKeyRefresher& aContext) const |
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232 { |
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233 LOG_FUNC |
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234 // async call to delete the helper |
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235 aContext.iLink.AsyncDeleteKeyRefresher(); |
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236 } |
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237 |
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238 //---------------------------------------------------------------------------------- |
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239 |
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240 TEkrStateDisablingLPM::TEkrStateDisablingLPM(CEncryptionKeyRefresherStateFactory& aFactory) |
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241 : TEncryptionKeyRefresherState(aFactory) |
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242 { |
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243 LOG_FUNC |
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244 STATENAME("TEkrStateDisablingLPM"); |
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245 } |
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246 |
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247 void TEkrStateDisablingLPM::Enter(CEncryptionKeyRefresher& aContext) const |
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248 { |
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249 LOG_FUNC |
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250 |
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251 if (aContext.iLink.LinkMode() == EActiveMode) |
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252 { |
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253 // Skip straight on to refresh the key |
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254 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::ERefreshingKey); |
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255 } |
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256 else |
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257 { |
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258 aContext.NotifyBasebandEvent(ENotifyActiveMode); |
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259 } |
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260 |
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261 // DisableLPM even if link is active to prevent possible LPM requests during key refresh |
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262 aContext.DisableLPM(); |
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263 } |
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264 |
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265 void TEkrStateDisablingLPM::EventReceived(CEncryptionKeyRefresher& aContext, TBTBasebandEventNotification& aEvent) const |
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266 { |
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267 LOG_FUNC |
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268 if (aEvent.EventType()==ENotifyActiveMode && aEvent.ErrorCode()==KErrNone) |
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269 { |
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270 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::ERefreshingKey); |
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271 } |
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272 else |
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273 { |
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274 LOG(_L("CEncryptionKeyRefresher failed in DisableLPM")); |
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275 // If we can't put ourselves into active mode then don't bother with |
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276 // refresh, it'll probably cause more problems than it would solve |
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277 // we can quit SM, don't need to rewind |
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278 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::EIdle); |
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279 } |
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280 } |
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281 |
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282 //---------------------------------------------------------------------------------- |
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283 TEkrStateRefreshingKey::TEkrStateRefreshingKey(CEncryptionKeyRefresherStateFactory& aFactory) |
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284 : TEncryptionKeyRefresherState(aFactory) |
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285 { |
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286 LOG_FUNC |
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287 STATENAME("TEkrStateRefreshingKey"); |
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288 } |
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289 |
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290 void TEkrStateRefreshingKey::Enter(CEncryptionKeyRefresher& aContext) const |
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291 { |
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292 LOG_FUNC |
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293 |
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294 TRAPD(err, aContext.iLinkMgr.HCIFacade().RefreshEncryptionKeyL(aContext.iLink.Handle())); |
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295 |
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296 if(err) |
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297 { |
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298 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::EIdle); |
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299 } |
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300 } |
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301 |
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302 void TEkrStateRefreshingKey::EncryptionKeyRefreshComplete(CEncryptionKeyRefresher& aContext, TInt __DEBUG_ONLY(aError)) const |
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303 { |
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304 LOG_FUNC |
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305 LOG1(_L("EncryptionKeyRefresh completed with error %d"), aError); |
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306 |
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307 // Don't really care what the error is, this is just a best effort service |
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308 // anyway |
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309 ChangeState(aContext, CEncryptionKeyRefresherStateFactory::EIdle); |
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310 } |
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311 |