1 /* |
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2 * Copyright (c) 2010 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: Bluetooth connection tracker and manager. |
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15 * |
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16 */ |
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17 |
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18 #include "btnotifconnectiontracker.h" |
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19 #include <btextnotifiers.h> |
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20 #ifdef SYMBIAN_ENABLE_SPLIT_HEADERS |
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21 #include <btextnotifierspartner.h> |
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22 #endif |
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23 |
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24 #include <btservices/btdevextension.h> |
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25 #include <btservices/btdevrepository.h> |
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26 |
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27 #include "btnotifsession.h" |
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28 #include "btnotifclientserver.h" |
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29 #include "bluetoothtrace.h" |
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30 #include "btnotifsecuritymanager.h" |
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31 |
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32 /** Time window for determining if there are too many requests. */ |
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33 #ifndef __WINS__ |
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34 #define KDENYTHRESHOLD TTimeIntervalSeconds(3) |
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35 #else //__WINS__ |
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36 #define KDENYTHRESHOLD TTimeIntervalSeconds(5) |
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37 #endif //__WINS__ |
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38 |
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39 |
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40 // ======== LOCAL FUNCTIONS ======== |
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41 |
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42 // ======== MEMBER FUNCTIONS ======== |
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43 |
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44 // --------------------------------------------------------------------------- |
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45 // C++ default constructor |
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46 // --------------------------------------------------------------------------- |
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47 // |
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48 CBTNotifConnectionTracker::CBTNotifConnectionTracker( CBTNotifServer* aServer ) |
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49 : iServer( aServer ) |
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50 { |
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51 } |
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52 |
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53 |
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54 // --------------------------------------------------------------------------- |
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55 // Symbian 2nd-phase constructor |
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56 // --------------------------------------------------------------------------- |
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57 // |
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58 void CBTNotifConnectionTracker::ConstructL() |
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59 { |
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60 BOstraceFunctionEntry0( DUMMY_DEVLIST ); |
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61 // Open a handle to the registry server |
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62 User::LeaveIfError( iBTRegistrySession.Connect() ); |
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63 // Open a handle to the socket server |
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64 User::LeaveIfError( iSockServ.Connect() ); |
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65 iPairingManager = CBTNotifSecurityManager::NewL(*this, iServer->DevRepository() ); |
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66 BOstraceFunctionExit0( DUMMY_DEVLIST ); |
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67 } |
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68 |
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69 |
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70 // --------------------------------------------------------------------------- |
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71 // NewL. |
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72 // --------------------------------------------------------------------------- |
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73 // |
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74 CBTNotifConnectionTracker* CBTNotifConnectionTracker::NewL( CBTNotifServer* aServer ) |
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75 { |
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76 CBTNotifConnectionTracker* self = new( ELeave ) CBTNotifConnectionTracker( aServer ); |
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77 CleanupStack::PushL( self ); |
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78 self->ConstructL(); |
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79 CleanupStack::Pop( self ); |
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80 return self; |
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81 } |
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82 |
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83 |
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84 // --------------------------------------------------------------------------- |
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85 // Destructor |
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86 // --------------------------------------------------------------------------- |
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87 // |
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88 CBTNotifConnectionTracker::~CBTNotifConnectionTracker() |
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89 { |
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90 BOstraceFunctionEntry0( DUMMY_DEVLIST ); |
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91 iDeniedRequests.Close(); |
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92 delete iPairingManager; |
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93 iSockServ.Close(); |
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94 iBTRegistrySession.Close(); |
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95 BOstraceFunctionExit0( DUMMY_DEVLIST ); |
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96 } |
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97 |
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98 // --------------------------------------------------------------------------- |
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99 // Process notifier message related to pairing notifiers. |
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100 // --------------------------------------------------------------------------- |
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101 // |
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102 void CBTNotifConnectionTracker::HandleNotifierRequestL( const RMessage2& aMessage ) |
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103 { |
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104 BOstraceFunctionEntryExt ( DUMMY_LIST, this, aMessage.Function() ); |
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105 iPairingManager->HandleNotifierRequestL(aMessage); |
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106 BOstraceFunctionExit1( DUMMY_DEVLIST, this ); |
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107 } |
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108 |
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109 // --------------------------------------------------------------------------- |
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110 // Handle a request related to pairing. |
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111 // --------------------------------------------------------------------------- |
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112 // |
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113 void CBTNotifConnectionTracker::HandleBondingRequestL( const RMessage2& aMessage ) |
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114 { |
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115 BOstraceFunctionEntryExt ( DUMMY_LIST, this, aMessage.Function() ); |
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116 iPairingManager->HandleBondingRequestL(aMessage); |
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117 BOstraceFunctionExit1( DUMMY_DEVLIST, this ); |
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118 } |
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119 |
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120 // --------------------------------------------------------------------------- |
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121 // Check if this device has been denied a connection already before. |
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122 // Also check if a previous connection attempt has just been rejected. |
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123 // --------------------------------------------------------------------------- |
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124 // |
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125 TBool CBTNotifConnectionTracker::UpdateBlockingHistoryL( const CBTDevice* aDevice, |
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126 TBool aAccepted ) |
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127 { |
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128 BOstraceFunctionEntry0( DUMMY_DEVLIST ); |
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129 __ASSERT_ALWAYS( aDevice, PanicServer( EBTNotifPanicBadArgument ) ); |
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130 // Check the time since the previous event. |
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131 TBool result = RecordConnectionAttempts( aAccepted ); |
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132 TInt pos = iDeniedRequests.Find( aDevice->BDAddr() ); |
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133 if( !aAccepted ) |
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134 { |
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135 if( pos == KErrNotFound ) |
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136 { |
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137 // The user denied the request from a new device, record the device address. |
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138 if( aDevice->IsValidPaired() && aDevice->IsPaired() ) |
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139 //[MCL]: && iDevice->LinkKeyType() != ELinkKeyUnauthenticatedUpgradable ) |
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140 { |
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141 // Paired devices are allowed one time rejection without a prompt for blocking. |
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142 result = EFalse; |
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143 } |
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144 iDeniedRequests.AppendL( aDevice->BDAddr() ); |
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145 } |
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146 // Nothing needed here if the address is already in the array. |
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147 } |
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148 else if( pos > KErrNotFound ) |
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149 { |
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150 // The user accepted a request, and it was from a device he/she |
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151 // previously rejected. Clear the history for this device from the array. |
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152 iDeniedRequests.Remove( pos ); |
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153 } |
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154 BOstraceFunctionExit0( DUMMY_DEVLIST ); |
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155 return result; |
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156 } |
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157 |
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158 // --------------------------------------------------------------------------- |
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159 // Record and check the time between connection attempts. |
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160 // --------------------------------------------------------------------------- |
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161 // |
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162 TBool CBTNotifConnectionTracker::RecordConnectionAttempts( TBool aAccepted ) |
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163 { |
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164 BOstraceFunctionEntry1( DUMMY_DEVLIST, this ); |
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165 TBool result = ETrue; |
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166 TTime now( 0 ); |
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167 if( !aAccepted ) |
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168 { |
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169 now.UniversalTime(); |
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170 if( iLastReject ) |
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171 { |
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172 // Check the time between denied connections, that it does not go too fast. |
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173 TTimeIntervalSeconds prev( 0 ); |
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174 if( !now.SecondsFrom( TTime( iLastReject ), prev ) ) |
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175 { |
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176 if( prev <= KDENYTHRESHOLD ) |
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177 { |
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178 // We are getting the requests too fast. Present the user with |
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179 // an option to turn BT off. |
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180 //iServer->SettingsTracker()->SetPower( EFalse ); |
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181 result = EFalse; |
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182 } |
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183 } |
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184 } |
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185 } |
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186 // Record the current timestamp. |
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187 // It is reset in case the user accepted the request. |
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188 iLastReject = now.Int64(); |
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189 BOstraceFunctionExitExt( DUMMY_DEVLIST, this, result ); |
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190 return result; |
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191 } |
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192 |
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