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1 /* |
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2 * Copyright (c) 2009-2010 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 the License "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: This class implements WLAN background scan logic. |
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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 * %version: 3 % |
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20 */ |
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21 |
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22 #include <e32base.h> |
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23 #include <e32const.h> |
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24 |
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25 #include "wlanscanproviderinterface.h" |
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26 #include "awsinterface.h" |
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27 #include "awsenginebase.h" |
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28 #include "wlanbgscanawscommsinterface.h" |
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29 #include "wlanbgscan.h" |
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30 #include "wlanbgscanstates.h" |
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31 #include "wlandevicesettings.h" // default values in case invalid data is passed in NotifyChangedSettings |
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32 #include "wlantimer.h" |
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33 #include "am_debug.h" |
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34 |
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35 /** Constant indicating that scanning is disabled */ |
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36 const TUint32 KWlanNoScanning( 0xFFFFFFFF ); |
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37 |
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38 // ======== MEMBER FUNCTIONS ======== |
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39 |
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40 // --------------------------------------------------------------------------- |
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41 // CWlanBgScanStates::CWlanBgScanStates |
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42 // --------------------------------------------------------------------------- |
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43 // |
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44 CWlanBgScanStates::CWlanBgScanStates( CWlanBgScan& aBgScan, MWlanScanResultProvider& aProvider, MWlanTimerServices& aTimerServices ) : |
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45 iBgScan( aBgScan ), |
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46 iUsedBgScanInterval( KWlanNoScanning ), |
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47 iBgScanInterval( KWlanNoScanning ), |
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48 iAggressiveBgScanInterval( KWlanNoScanning ), |
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49 iAggressiveBgScanTimer( NULL ), |
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50 iNextState( EBgScanStateMax ), |
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51 iAwsStartupStatus( KErrNotFound ), |
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52 iAwsCmd( MWlanBgScanAwsComms::EAwsCommandMax ), |
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53 iAwsCmdStatus( KErrNone ), |
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54 iAutoInterval( KWlanBgScanIntervalNever ), |
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55 iProvider( aProvider ), |
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56 iTimerServices( aTimerServices ), |
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57 iBgScanState( EBgScanStateMax ), |
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58 iIntervalChangeRequestId( 0 ), |
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59 iCompletedAwsCommand( MWlanBgScanAwsComms::EAwsCommandMax ), |
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60 iAwsCommandCompletionCode( KErrNone ) |
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61 { |
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62 DEBUG( "CWlanBgScanStates::CWlanBgScanStates()" ); |
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63 } |
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64 |
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65 // --------------------------------------------------------------------------- |
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66 // CWlanBgScanStates::ConstructL |
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67 // --------------------------------------------------------------------------- |
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68 // |
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69 void CWlanBgScanStates::ConstructL() |
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70 { |
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71 DEBUG( "CWlanBgScanStates::ConstructL()" ); |
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72 |
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73 if( iBgScan.AwsPresence() == CWlanBgScan::EAwsStarting ) |
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74 { |
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75 DEBUG( "CWlanBgScanStates::ConstructL() - AWS starting up, goto Init state" ); |
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76 iBgScanState = EBgScanInit; |
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77 } |
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78 else |
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79 { |
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80 DEBUG( "CWlanBgScanStates::ConstructL() - AWS not present, goto Off state" ); |
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81 iBgScanState = EBgScanOff; |
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82 } |
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83 |
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84 // Create a timer for guarding when to drop out of aggressive BG scan mode |
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85 iAggressiveBgScanTimer = CWlanTimer::NewL( TCallBack( StopAggressiveBgScan, this ), |
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86 TCallBack( StopAggressiveBgScan, this ), |
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87 TCallBack( StopAggressiveBgScan, this ) ); |
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88 |
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89 DEBUG( "CWlanBgScanStates::ConstructL() - done" ); |
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90 } |
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91 |
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92 // --------------------------------------------------------------------------- |
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93 // CWlanBgScanStates::~CWlanBgScanStates |
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94 // --------------------------------------------------------------------------- |
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95 // |
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96 CWlanBgScanStates::~CWlanBgScanStates() |
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97 { |
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98 DEBUG( "CWlanBgScanStates::~CWlanBgScanStates()" ); |
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99 delete iAggressiveBgScanTimer; |
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100 } |
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101 |
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102 // --------------------------------------------------------------------------- |
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103 // CWlanBgScanStates::StartAggressiveBgScan |
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104 // --------------------------------------------------------------------------- |
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105 // |
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106 void CWlanBgScanStates::StartAggressiveBgScan( TUint32& aInterval, TUint32& aDuration ) |
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107 { |
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108 DEBUG3( "CWlanBgScanStates::StartAggressiveBgScan() - new interval: %u, old interval: %u, duration: %u", |
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109 aInterval, iAggressiveBgScanInterval, aDuration ); |
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110 // Serve the request only if the requested interval is smaller or equal than |
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111 // what is already being served |
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112 if( aInterval <= iAggressiveBgScanInterval ) |
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113 { |
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114 iAggressiveBgScanInterval = aInterval; |
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115 |
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116 // Start the timer guarding when to drop out of aggressive mode |
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117 iAggressiveBgScanTimer->Cancel(); |
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118 iAggressiveBgScanTimer->After( aDuration ); |
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119 |
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120 // Refresh interval used in BG scanning |
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121 RefreshUsedInterval(); |
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122 } |
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123 } |
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124 |
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125 // --------------------------------------------------------------------------- |
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126 // CWlanBgScanStates::StopAggressiveBgScan |
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127 // --------------------------------------------------------------------------- |
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128 // |
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129 TInt CWlanBgScanStates::StopAggressiveBgScan( TAny* aPtr ) |
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130 { |
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131 DEBUG( "CWlanBgScanStates::StopAggressiveBgScan()" ); |
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132 |
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133 CWlanBgScanStates* self = static_cast<CWlanBgScanStates*>( aPtr ); |
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134 |
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135 // Disable aggressive mode |
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136 self->iAggressiveBgScanInterval = KWlanNoScanning; |
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137 |
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138 // Refresh interval used in BG scanning |
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139 self->RefreshUsedInterval(); |
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140 |
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141 return KErrNone; |
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142 } |
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143 |
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144 // --------------------------------------------------------------------------- |
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145 // CWlanBgScanStates::GetBgInterval |
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146 // --------------------------------------------------------------------------- |
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147 // |
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148 TUint32 CWlanBgScanStates::GetBgInterval() |
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149 { |
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150 TUint32 scanInterval( iUsedBgScanInterval ); |
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151 |
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152 if( scanInterval == KWlanNoScanning ) |
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153 { |
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154 scanInterval = KWlanBgScanIntervalNever; |
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155 } |
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156 |
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157 return scanInterval; |
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158 } |
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159 |
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160 // --------------------------------------------------------------------------- |
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161 // CWlanBgScanStates::IntervalChanged |
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162 // --------------------------------------------------------------------------- |
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163 // |
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164 void CWlanBgScanStates::IntervalChanged() |
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165 { |
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166 DEBUG( "CWlanBgScanStates::IntervalChanged()" ); |
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167 |
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168 if( iBgScan.AwsPresence() == CWlanBgScan::EAwsStarting ) |
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169 { |
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170 DEBUG( "CWlanBgScanStates::IntervalChanged() - AWS is still starting up, returning" ); |
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171 return; |
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172 } |
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173 |
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174 NextState( CWlanBgScanStates::EBgScanEventIntervalChanged ); |
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175 |
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176 DEBUG2( "CWlanBgScanStates::IntervalChanged() - current interval %u, current state %u", |
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177 GetBgInterval(), |
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178 iBgScanState ); |
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179 } |
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180 |
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181 // --------------------------------------------------------------------------- |
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182 // CWlanBgScanStates::NextState |
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183 // --------------------------------------------------------------------------- |
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184 // |
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185 void CWlanBgScanStates::NextState( const CWlanBgScanStates::TWlanBgScanSmEvent& aEvent ) |
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186 { |
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187 DEBUG1( "CWlanBgScanStates::NextState() - aEvent %u", aEvent ); |
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188 |
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189 switch ( iBgScanState ) |
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190 { |
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191 case EBgScanInit: |
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192 { |
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193 InStateInit( iBgScanState, aEvent ); |
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194 break; |
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195 } |
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196 case EBgScanOff: |
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197 { |
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198 InStateOff( iBgScanState, aEvent ); |
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199 break; |
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200 } |
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201 case EBgScanOn: |
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202 { |
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203 InStateOn( iBgScanState, aEvent ); |
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204 break; |
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205 } |
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206 case EBgScanAuto: |
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207 { |
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208 InStateAuto( iBgScanState, aEvent ); |
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209 break; |
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210 } |
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211 case EBgScanAutoAws: |
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212 { |
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213 InStateAutoAws( iBgScanState, aEvent ); |
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214 break; |
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215 } |
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216 case EBgScanSendingAwsCmd: |
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217 { |
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218 InStateSendingAwsCmd( iBgScanState, aEvent ); |
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219 break; |
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220 } |
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221 default: |
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222 { |
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223 DEBUG1( "CWlanBgScanStates::NextState() - error: invalid state %d", iBgScanState ); |
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224 ASSERT( 0 ); |
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225 break; |
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226 } |
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227 } |
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228 } |
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229 |
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230 // --------------------------------------------------------------------------- |
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231 // CWlanBgScanStates::InStateInit |
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232 // --------------------------------------------------------------------------- |
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233 // |
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234 void CWlanBgScanStates::InStateInit( TWlanBgScanState& aState, const CWlanBgScanStates::TWlanBgScanSmEvent& aEvent ) |
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235 { |
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236 switch( aEvent ) |
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237 { |
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238 case CWlanBgScanStates::EBgScanEventAwsStartupComplete: |
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239 { |
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240 DEBUG( "CWlanBgScanStates::InStateInit() - event: EBgScanEventAwsStartupComplete" ); |
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241 switch( AwsStartupStatus() ) |
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242 { |
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243 case KErrNone: |
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244 { |
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245 DEBUG( "CWlanBgScanStates::InStateInit() - AWS startup successful" ); |
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246 switch ( iBgScanSettings.backgroundScanInterval ) |
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247 { |
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248 case KWlanBgScanIntervalNever: |
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249 { |
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250 DEBUG( "CWlanBgScanStates::InStateInit() - state change Init to Off" ); |
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251 StateChangeInitToOff( aState ); |
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252 break; |
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253 } |
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254 case KWlanBgScanIntervalAutomatic: |
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255 { |
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256 DEBUG( "CWlanBgScanStates::InStateInit() - state change Init to AutoAws" ); |
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257 StateChangeInitToAutoAws( aState ); |
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258 break; |
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259 } |
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260 default: |
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261 { |
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262 DEBUG( "CWlanBgScanStates::InStateInit() - state change Init to On" ); |
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263 StateChangeInitToOn( aState ); |
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264 } |
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265 } |
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266 break; |
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267 } |
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268 default: |
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269 { |
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270 DEBUG1( "CWlanBgScanStates::InStateInit() - AWS startup failed! Status %d", AwsStartupStatus() ); |
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271 switch ( iBgScanSettings.backgroundScanInterval ) |
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272 { |
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273 case KWlanBgScanIntervalNever: |
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274 { |
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275 DEBUG( "CWlanBgScanStates::InStateInit() - state change Init to Off" ); |
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276 StateChangeInitToOff( aState ); |
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277 break; |
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278 } |
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279 case KWlanBgScanIntervalAutomatic: |
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280 { |
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281 DEBUG( "CWlanBgScanStates::InStateInit() - state change Init to Auto" ); |
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282 StateChangeInitToAuto( aState ); |
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283 break; |
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284 } |
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285 default: |
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286 { |
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287 DEBUG( "CWlanBgScanStates::InStateInit() - state change Init to On" ); |
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288 StateChangeInitToOn( aState ); |
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289 break; |
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290 } |
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291 } |
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292 break; |
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293 } |
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294 } |
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295 break; |
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296 } |
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297 default: |
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298 { |
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299 DEBUG1( "CWlanBgScanStates::InStateInit() - event %d ignored", aEvent ); |
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300 } |
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301 } |
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302 } |
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303 |
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304 // --------------------------------------------------------------------------- |
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305 // CWlanBgScanStates::StateChangeInitToOn |
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306 // --------------------------------------------------------------------------- |
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307 // |
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308 void CWlanBgScanStates::StateChangeInitToOn( TWlanBgScanState& aState ) |
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309 { |
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310 DEBUG( "CWlanBgScanStates::StateChangeInitToOn()" ); |
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311 aState = EBgScanOn; |
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312 SetInterval( iBgScanSettings.backgroundScanInterval ); |
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313 } |
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314 |
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315 // --------------------------------------------------------------------------- |
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316 // CWlanBgScanStates::StateChangeInitToOff |
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317 // --------------------------------------------------------------------------- |
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318 // |
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319 void CWlanBgScanStates::StateChangeInitToOff( TWlanBgScanState& aState ) |
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320 { |
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321 DEBUG( "CWlanBgScanStates::StateChangeInitToOff()" ); |
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322 aState = EBgScanOff; |
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323 SetInterval( KWlanBgScanIntervalNever ); |
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324 } |
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325 |
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326 // --------------------------------------------------------------------------- |
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327 // CWlanBgScanStates::StateChangeInitToAuto |
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328 // --------------------------------------------------------------------------- |
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329 // |
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330 void CWlanBgScanStates::StateChangeInitToAuto( TWlanBgScanState& aState ) |
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331 { |
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332 aState = EBgScanAuto; |
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333 DEBUG( "CWlanBgScanStates::StateChangeInitToAuto() - determine next interval change time and request callback" ); |
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334 iBgScan.ScheduleAutoIntervalChange(); |
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335 SetInterval( iBgScan.CurrentAutoInterval() ); |
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336 } |
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337 |
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338 // --------------------------------------------------------------------------- |
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339 // CWlanBgScanStates::InStateOff |
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340 // --------------------------------------------------------------------------- |
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341 // |
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342 void CWlanBgScanStates::InStateOff( TWlanBgScanState& aState, const CWlanBgScanStates::TWlanBgScanSmEvent& aEvent ) |
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343 { |
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344 switch( aEvent ) |
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345 { |
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346 case CWlanBgScanStates::EBgScanEventIntervalChanged: |
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347 { |
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348 DEBUG( "CWlanBgScanStates::InStateOff() - event: EBgScanEventIntervalChanged" ); |
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349 switch( iBgScanSettings.backgroundScanInterval ) |
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350 { |
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351 case KWlanBgScanIntervalNever: |
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352 { |
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353 DEBUG( "CWlanBgScanStates::InStateOff() - no change in the interval" ); |
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354 aState = EBgScanOff; |
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355 break; |
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356 } |
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357 case KWlanBgScanIntervalAutomatic: |
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358 { |
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359 DEBUG( "CWlanBgScanStates::InStateOff() - state change Off to Automatic" ); |
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360 StateChangeOffToAutomatic( aState ); |
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361 break; |
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362 } |
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363 default: |
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364 { |
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365 DEBUG1( "CWlanBgScanStates::InStateOff() - state change Off to On (interval: %u)", iBgScanSettings.backgroundScanInterval ); |
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366 StateChangeOffToOn( aState, iBgScanSettings.backgroundScanInterval ); |
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367 } |
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368 } |
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369 break; |
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370 } |
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371 default: |
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372 { |
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373 DEBUG1( "CWlanBgScanStates::InStateOff() - event %d ignored", aEvent ); |
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374 } |
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375 } |
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376 } |
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377 |
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378 // --------------------------------------------------------------------------- |
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379 // CWlanBgScanStates::StateChangeOffToOn |
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380 // --------------------------------------------------------------------------- |
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381 // |
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382 void CWlanBgScanStates::StateChangeOffToOn( TWlanBgScanState& aState, TUint32 aNewBgScanInterval ) |
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383 { |
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384 aState = EBgScanOn; |
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385 SetInterval( aNewBgScanInterval ); |
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386 } |
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387 |
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388 // --------------------------------------------------------------------------- |
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389 // CWlanBgScanStates::StateChangeOffToAutomatic |
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390 // --------------------------------------------------------------------------- |
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391 // |
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392 void CWlanBgScanStates::StateChangeOffToAutomatic( TWlanBgScanState& aState ) |
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393 { |
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394 if ( iBgScan.AwsPresence() == CWlanBgScan::EAwsPresent ) |
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395 { |
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396 DEBUG( "CWlanBgScanStates::StateChangeOffToAutomatic() - state change Off to SendingAwsCmd" ); |
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397 aState = EBgScanSendingAwsCmd; |
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398 DEBUG( "CWlanBgScanStates::InStaStateChangeOffToAutomaticteOff() - if command sending succeeds, next state is AutoAws" ); |
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399 iNextState = EBgScanAutoAws; |
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400 MWlanBgScanAwsComms::TAwsMessage msg = { MWlanBgScanAwsComms::EStart, 0 }; |
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401 iBgScan.AwsCommand( msg ); |
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402 DEBUG( "CWlanBgScanStates::StateChangeOffToAutomatic() - SendOrQueueAwsCommand() returned" ); |
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403 } |
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404 else |
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405 { |
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406 DEBUG( "CWlanBgScanStates::StateChangeOffToAutomatic() - state change Off to Auto" ); |
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407 DEBUG( "CWlanBgScanStates::StateChangeOffToAutomatic() - determine next interval change time and request callback" ); |
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408 aState = EBgScanAuto; |
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409 iBgScan.ScheduleAutoIntervalChange(); |
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410 SetInterval( iBgScan.CurrentAutoInterval() ); |
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411 } |
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412 } |
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413 // --------------------------------------------------------------------------- |
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414 // CWlanBgScanStates::InStateOn |
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415 // --------------------------------------------------------------------------- |
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416 // |
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417 void CWlanBgScanStates::InStateOn( TWlanBgScanState& aState, const CWlanBgScanStates::TWlanBgScanSmEvent& aEvent ) |
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418 { |
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419 switch( aEvent ) |
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420 { |
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421 case CWlanBgScanStates::EBgScanEventIntervalChanged: |
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422 { |
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423 DEBUG( "CWlanBgScanStates::InStateOn() - event: EBgScanEventIntervalChanged" ); |
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424 switch( iBgScanSettings.backgroundScanInterval ) |
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425 { |
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426 case KWlanBgScanIntervalNever: |
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427 { |
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428 DEBUG( "CWlanBgScanStates::InStateOn() - state change On to Off" ); |
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429 StateChangeOnToOff( aState ); |
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430 break; |
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431 } |
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432 case KWlanBgScanIntervalAutomatic: |
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433 { |
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434 DEBUG( "CWlanBgScanStates::InStateOn() - state change On to Auto" ); |
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435 StateChangeOnToAutomatic( aState ); |
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436 break; |
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437 } |
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438 default: |
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439 { |
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440 DEBUG( "CWlanBgScanStates::InStateOn() - state change On to On" ); |
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441 StateChangeOnToOn( aState, iBgScanSettings.backgroundScanInterval ); |
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442 } |
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443 } |
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444 break; |
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445 } |
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446 default: |
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447 { |
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448 DEBUG1( "CWlanBgScanStates::InStateOn() - event %d ignored", aEvent ); |
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449 } |
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450 } |
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451 } |
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452 |
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453 // --------------------------------------------------------------------------- |
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454 // CWlanBgScanStates::StateChangeOnToOn |
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455 // --------------------------------------------------------------------------- |
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456 // |
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457 void CWlanBgScanStates::StateChangeOnToOn( TWlanBgScanState& aState, TUint32 aNewBgScanSetting ) |
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458 { |
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459 aState = EBgScanOn; |
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460 SetInterval( aNewBgScanSetting ); |
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461 } |
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462 |
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463 // --------------------------------------------------------------------------- |
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464 // CWlanBgScanStates::StateChangeOnToAutomatic |
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465 // --------------------------------------------------------------------------- |
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466 // |
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467 void CWlanBgScanStates::StateChangeOnToAutomatic( TWlanBgScanState& aState ) |
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468 { |
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469 if ( iBgScan.AwsPresence() == CWlanBgScan::EAwsPresent ) |
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470 { |
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471 DEBUG( "CWlanBgScanStates::StateChangeOnToAutomatic() - state change Init to SendingAwsCmd" ); |
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472 aState = EBgScanSendingAwsCmd; |
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473 DEBUG( "CWlanBgScanStates::StateChangeOnToAutomatic() - if command sending succeeds, next state is AutoAws" ); |
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474 iNextState = EBgScanAutoAws; |
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475 MWlanBgScanAwsComms::TAwsMessage msg = { MWlanBgScanAwsComms::EStart, 0 }; |
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476 iBgScan.AwsCommand( msg ); |
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477 DEBUG( "CWlanBgScanStates::StateChangeOnToAutomatic() - SendOrQueueAwsCommand() returned" ); |
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478 } |
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479 else |
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480 { |
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481 aState = EBgScanAuto; |
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482 iBgScan.ScheduleAutoIntervalChange(); |
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483 SetInterval( iBgScan.CurrentAutoInterval() ); |
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484 } |
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485 } |
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486 |
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487 // --------------------------------------------------------------------------- |
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488 // CWlanBgScanStates::StateChangeOnToOff |
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489 // --------------------------------------------------------------------------- |
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490 // |
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491 void CWlanBgScanStates::StateChangeOnToOff( TWlanBgScanState& aState ) |
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492 { |
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493 aState = EBgScanOff; |
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494 SetInterval( KWlanBgScanIntervalNever ); |
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495 } |
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496 |
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497 // --------------------------------------------------------------------------- |
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498 // CWlanBgScanStates::InStateAuto |
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499 // --------------------------------------------------------------------------- |
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500 // |
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501 void CWlanBgScanStates::InStateAuto( TWlanBgScanState& aState, const CWlanBgScanStates::TWlanBgScanSmEvent& aEvent ) |
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502 { |
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503 switch( aEvent ) |
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504 { |
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505 case CWlanBgScanStates::EBgScanEventIntervalChanged: |
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506 { |
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507 DEBUG( "CWlanBgScanStates::InStateAuto() - event: EBgScanEventIntervalChanged" ); |
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508 switch( iBgScanSettings.backgroundScanInterval ) |
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509 { |
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510 case KWlanBgScanIntervalNever: |
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511 { |
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512 DEBUG( "CWlanBgScanStates::InStateAuto() - state change Auto to Off" ); |
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513 StateChangeAutoToOff( aState ); |
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514 break; |
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515 } |
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516 case KWlanBgScanIntervalAutomatic: |
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517 { |
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518 DEBUG( "CWlanBgScanStates::InStateAuto() - state still Auto" ); |
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519 StateChangeAutoToAuto( aState ); |
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520 break; |
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521 } |
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522 default: |
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523 { |
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524 DEBUG( "CWlanBgScanStates::InStateAuto() - state change Auto to On" ); |
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525 StateChangeAutoToOn( aState, iBgScanSettings.backgroundScanInterval ); |
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526 } |
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527 } |
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528 break; |
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529 } |
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530 default: |
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531 { |
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532 DEBUG1( "CWlanBgScanStates::InStateAuto() - event %d ignored", aEvent ); |
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533 } |
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534 } |
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535 } |
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536 |
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537 // --------------------------------------------------------------------------- |
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538 // CWlanBgScanStates::StateChangeAutoToOff |
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539 // --------------------------------------------------------------------------- |
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540 // |
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541 void CWlanBgScanStates::StateChangeAutoToOff( TWlanBgScanState& aState ) |
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542 { |
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543 aState = EBgScanOff; |
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544 iTimerServices.StopTimer( iIntervalChangeRequestId ); |
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545 iIntervalChangeRequestId = 0; |
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546 SetInterval( KWlanBgScanIntervalNever ); |
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547 } |
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548 |
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549 // --------------------------------------------------------------------------- |
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550 // CWlanBgScanStates::StateChangeAutoToAuto |
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551 // --------------------------------------------------------------------------- |
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552 // |
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553 void CWlanBgScanStates::StateChangeAutoToAuto( TWlanBgScanState& aState ) |
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554 { |
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555 aState = EBgScanAuto; |
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556 iBgScan.ScheduleAutoIntervalChange(); |
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557 SetInterval( iBgScan.CurrentAutoInterval() ); |
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558 } |
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559 |
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560 // --------------------------------------------------------------------------- |
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561 // CWlanBgScanStates::StateChangeAutoToOn |
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562 // --------------------------------------------------------------------------- |
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563 // |
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564 void CWlanBgScanStates::StateChangeAutoToOn( TWlanBgScanState& aState, TUint32 aNewBgScanSetting ) |
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565 { |
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566 aState = EBgScanOn; |
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567 iTimerServices.StopTimer( iIntervalChangeRequestId ); |
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568 iIntervalChangeRequestId = 0; |
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569 SetInterval( aNewBgScanSetting ); |
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570 } |
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571 |
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572 // --------------------------------------------------------------------------- |
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573 // CWlanBgScanStates::InStateAutoAws |
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574 // --------------------------------------------------------------------------- |
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575 // |
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576 void CWlanBgScanStates::InStateAutoAws( TWlanBgScanState& aState, const CWlanBgScanStates::TWlanBgScanSmEvent& aEvent ) |
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577 { |
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578 switch( aEvent ) |
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579 { |
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580 case CWlanBgScanStates::EBgScanEventIntervalChanged: |
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581 { |
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582 DEBUG( "CWlanBgScanStates::InStateAutoAws() - event: EBgScanEventIntervalChanged" ); |
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583 switch( iBgScanSettings.backgroundScanInterval ) |
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584 { |
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585 case KWlanBgScanIntervalNever: |
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586 { |
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587 DEBUG( "CWlanBgScanStates::InStateAutoAws() - state change AutoAws to Off" ); |
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588 StateChangeAutoAwsToOff( aState ); |
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589 break; |
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590 } |
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591 case KWlanBgScanIntervalAutomatic: |
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592 { |
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593 DEBUG( "CWlanBgScanStates::InStateAutoAws() - no change in the interval" ); |
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594 aState = EBgScanAutoAws; |
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595 break; |
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596 } |
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597 default: |
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598 { |
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599 DEBUG( "CWlanBgScanStates::InStateAutoAws() - state change AutoAws to On" ); |
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600 StateChangeAutoAwsToOn( aState ); |
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601 } |
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602 } |
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603 break; |
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604 } |
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605 case CWlanBgScanStates::EBgScanEventAwsIntervalChanged: |
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606 { |
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607 DEBUG( "CWlanBgScanStates::InStateAutoAws() - event: EBgScanEventAwsIntervalChanged" ); |
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608 SetInterval( AutoInterval() ); |
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609 break; |
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610 } |
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611 default: |
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612 { |
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613 DEBUG1( "CWlanBgScanStates::InStateAutoAws() - event %d ignored", aEvent ); |
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614 } |
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615 } |
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616 } |
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617 |
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618 // --------------------------------------------------------------------------- |
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619 // CWlanBgScanStates::StateChangeAutoAwsToOff |
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620 // --------------------------------------------------------------------------- |
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621 // |
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622 void CWlanBgScanStates::StateChangeAutoAwsToOff( TWlanBgScanState& aState ) |
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623 { |
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624 aState = EBgScanSendingAwsCmd; |
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625 iNextState = EBgScanOff; |
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626 DEBUG( "CWlanBgScanStates::StateChangeAutoAwsToOff() - calling SendOrQueueAwsCommand()" ); |
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627 MWlanBgScanAwsComms::TAwsMessage msg = { MWlanBgScanAwsComms::EStop, 0 }; |
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628 iBgScan.AwsCommand( msg ); |
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629 DEBUG( "CWlanBgScanStates::StateChangeAutoAwsToOff() - SendOrQueueAwsCommand() returned" ); |
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630 iProvider.CancelScan(); |
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631 } |
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632 |
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633 // --------------------------------------------------------------------------- |
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634 // CWlanBgScanStates::StateChangeAutoAwsToOn |
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635 // --------------------------------------------------------------------------- |
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636 // |
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637 void CWlanBgScanStates::StateChangeAutoAwsToOn( TWlanBgScanState& aState ) |
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638 { |
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639 aState = EBgScanSendingAwsCmd; |
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640 iNextState = EBgScanOn; |
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641 DEBUG( "CWlanBgScanStates::StateChangeAutoAwsToOn() - calling SendAwsCommand()" ); |
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642 MWlanBgScanAwsComms::TAwsMessage msg = { MWlanBgScanAwsComms::EStop, 0 }; |
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643 iBgScan.AwsCommand( msg ); |
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644 DEBUG( "CWlanBgScanStates::StateChangeAutoAwsToOn() - SendAwsCommand() returned" ); |
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645 } |
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646 |
|
647 // --------------------------------------------------------------------------- |
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648 // CWlanBgScanStates::InStateSendingAwsCmd |
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649 // --------------------------------------------------------------------------- |
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650 // |
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651 void CWlanBgScanStates::InStateSendingAwsCmd( TWlanBgScanState& aState, const CWlanBgScanStates::TWlanBgScanSmEvent& aEvent ) |
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652 { |
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653 DEBUG1( "CWlanBgScanStates::InStateSendingAwsCmd() - event: %d", aEvent ); |
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654 |
|
655 switch( aEvent ) |
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656 { |
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657 case CWlanBgScanStates::EBgScanEventAwsCmdComplete: |
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658 { |
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659 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - event: EBgScanEventAwsCmdComplete" ); |
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660 switch( AwsCmdStatus() ) |
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661 { |
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662 case KErrNone: |
|
663 { |
|
664 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - AWS command sending successful" ); |
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665 switch ( iNextState ) |
|
666 { |
|
667 case EBgScanOff: |
|
668 { |
|
669 ASSERT( AwsCmd() == MWlanBgScanAwsComms::EStop ); |
|
670 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - state change SendingAwsCmd to Off" ); |
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671 StateChangeSendingAwsCmdToOff( aState ); |
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672 break; |
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673 } |
|
674 case EBgScanOn: |
|
675 { |
|
676 ASSERT( AwsCmd() == MWlanBgScanAwsComms::EStop ); |
|
677 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - state change SendingAwsCmd to On" ); |
|
678 StateChangeSendingAwsCmdToOn( aState ); |
|
679 break; |
|
680 } |
|
681 case EBgScanAutoAws: |
|
682 { |
|
683 ASSERT( AwsCmd() == MWlanBgScanAwsComms::EStart ); |
|
684 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - state change SendingAwsCmd to AutoAws" ); |
|
685 StateChangeSendingAwsCmdToAutoAws( aState ); |
|
686 break; |
|
687 } |
|
688 default: |
|
689 { |
|
690 DEBUG1( "CWlanBgScanStates::InStateSendingAwsCmd() - illegal state change from SendingAwsCmd to %u", iNextState ); |
|
691 ASSERT( 0 ); |
|
692 } |
|
693 } |
|
694 break; |
|
695 } |
|
696 default: |
|
697 { |
|
698 DEBUG2( "CWlanBgScanStates::InStateSendingAwsCmd() - AWS command %d sending failed! Status %d", AwsCmd(), AwsCmdStatus() ); |
|
699 switch ( iNextState ) |
|
700 { |
|
701 case EBgScanOff: |
|
702 { |
|
703 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - state change SendingAwsCmd to Off" ); |
|
704 StateChangeSendingAwsCmdToOff( aState ); |
|
705 break; |
|
706 } |
|
707 case EBgScanOn: |
|
708 { |
|
709 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - state change SendingAwsCmd to On" ); |
|
710 StateChangeSendingAwsCmdToOn( aState ); |
|
711 break; |
|
712 } |
|
713 case EBgScanAutoAws: |
|
714 { |
|
715 DEBUG( "CWlanBgScanStates::InStateSendingAwsCmd() - state change SendingAwsCmd to Auto" ); |
|
716 StateChangeSendingAwsCmdToAuto( aState ); |
|
717 break; |
|
718 } |
|
719 default: |
|
720 { |
|
721 DEBUG1( "CWlanBgScanStates::InStateSendingAwsCmd() - illegal state change from SendingAwsCmd to %u", iNextState ); |
|
722 ASSERT( 0 ); |
|
723 } |
|
724 } |
|
725 break; |
|
726 } |
|
727 } |
|
728 break; |
|
729 } |
|
730 default: |
|
731 { |
|
732 DEBUG1( "CWlanBgScanStates::InStateSendingAwsCmd() - event %d ignored", aEvent ); |
|
733 } |
|
734 } |
|
735 } |
|
736 |
|
737 // --------------------------------------------------------------------------- |
|
738 // CWlanBgScanStates::StateChangeInitToAutoAws |
|
739 // --------------------------------------------------------------------------- |
|
740 // |
|
741 void CWlanBgScanStates::StateChangeInitToAutoAws( TWlanBgScanState& aState ) |
|
742 { |
|
743 if ( iBgScan.AwsPresence() == CWlanBgScan::EAwsPresent ) |
|
744 { |
|
745 DEBUG( "CWlanBgScanStates::StateChangeInitToAutoAws() - state change Init to SendingAwsCmd" ); |
|
746 aState = EBgScanSendingAwsCmd; |
|
747 DEBUG( "CWlanBgScanStates::StateChangeInitToAutoAws() - if command sending succeeds, next state is AutoAws" ); |
|
748 iNextState = EBgScanAutoAws; |
|
749 MWlanBgScanAwsComms::TAwsMessage msg = { MWlanBgScanAwsComms::EStart, 0 }; |
|
750 iBgScan.AwsCommand( msg ); |
|
751 DEBUG( "CWlanBgScanStates::StateChangeInitToAutoAws() - SendOrQueueAwsCommand() returned" ); |
|
752 } |
|
753 else |
|
754 { |
|
755 DEBUG( "CWlanBgScanStates::StateChangeInitToAutoAws() - error: AWS not present!" ); |
|
756 ASSERT( 0 ); |
|
757 DEBUG( "CWlanBgScanStates::StateChangeInitToAutoAws() - state change Init to Auto" ); |
|
758 aState = EBgScanAuto; |
|
759 DEBUG( "CWlanBgScanStates::StateChangeInitToAutoAws() - * determine next interval change time and request callback" ); |
|
760 iBgScan.ScheduleAutoIntervalChange(); |
|
761 SetInterval( iBgScan.CurrentAutoInterval() ); |
|
762 } |
|
763 } |
|
764 |
|
765 // --------------------------------------------------------------------------- |
|
766 // CWlanBgScanStates::StateChangeSendingAwsCmdToOff |
|
767 // --------------------------------------------------------------------------- |
|
768 // |
|
769 void CWlanBgScanStates::StateChangeSendingAwsCmdToOff( TWlanBgScanState& aState ) |
|
770 { |
|
771 DEBUG( "CWlanBgScanStates::StateChangeSendingAwsCmdToOff()" ); |
|
772 aState = EBgScanOff; |
|
773 SetInterval( KWlanBgScanIntervalNever ); |
|
774 } |
|
775 |
|
776 // --------------------------------------------------------------------------- |
|
777 // CWlanBgScanStates::StateChangeSendingAwsCmdToOn |
|
778 // --------------------------------------------------------------------------- |
|
779 // |
|
780 void CWlanBgScanStates::StateChangeSendingAwsCmdToOn( TWlanBgScanState& aState ) |
|
781 { |
|
782 DEBUG( "CWlanBgScanStates::StateChangeSendingAwsCmdToOn()" ); |
|
783 aState = EBgScanOn; |
|
784 SetInterval( iBgScanSettings.backgroundScanInterval ); |
|
785 } |
|
786 |
|
787 // --------------------------------------------------------------------------- |
|
788 // CWlanBgScanStates::StateChangeSendingAwsCmdToAuto |
|
789 // --------------------------------------------------------------------------- |
|
790 // |
|
791 void CWlanBgScanStates::StateChangeSendingAwsCmdToAuto( TWlanBgScanState& aState ) |
|
792 { |
|
793 DEBUG( "CWlanBgScanStates::StateChangeSendingAwsCmdToAuto()" ); |
|
794 aState = EBgScanAuto; |
|
795 DEBUG( "CWlanBgScanStates::StateChangeSendingAwsCmdToAuto() - * determine next interval change time and request callback" ); |
|
796 iBgScan.ScheduleAutoIntervalChange(); |
|
797 SetInterval( iBgScan.CurrentAutoInterval() ); |
|
798 } |
|
799 |
|
800 // --------------------------------------------------------------------------- |
|
801 // CWlanBgScanStates::StateChangeSendingAwsCmdToAutoAws |
|
802 // --------------------------------------------------------------------------- |
|
803 // |
|
804 void CWlanBgScanStates::StateChangeSendingAwsCmdToAutoAws( TWlanBgScanState& aState ) |
|
805 { |
|
806 DEBUG( "CWlanBgScanStates::StateChangeSendingAwsCmdToAutoAws()" ); |
|
807 aState = EBgScanAutoAws; |
|
808 SetInterval( AutoInterval() ); |
|
809 } |
|
810 |
|
811 // --------------------------------------------------------------------------- |
|
812 // CWlanBgScanStates::SetInterval |
|
813 // --------------------------------------------------------------------------- |
|
814 // |
|
815 void CWlanBgScanStates::SetInterval( TUint32 aInterval ) |
|
816 { |
|
817 DEBUG2( "CWlanBgScanStates::SetInterval() - current: %u, new: %u", iBgScanInterval, aInterval ); |
|
818 |
|
819 if( aInterval == KWlanBgScanIntervalNever ) |
|
820 { |
|
821 iBgScanInterval = KWlanNoScanning; |
|
822 } |
|
823 else |
|
824 { |
|
825 iBgScanInterval = aInterval; |
|
826 } |
|
827 |
|
828 RefreshUsedInterval(); |
|
829 } |
|
830 |
|
831 // --------------------------------------------------------------------------- |
|
832 // CWlanBgScanStates::RefreshUsedInterval |
|
833 // --------------------------------------------------------------------------- |
|
834 // |
|
835 void CWlanBgScanStates::RefreshUsedInterval() |
|
836 { |
|
837 TUint oldInterval = iUsedBgScanInterval; |
|
838 |
|
839 DEBUG2( "CWlanBgScanStates::RefreshUsedInterval() - agg: %u, normal: %u", |
|
840 iAggressiveBgScanInterval, iBgScanInterval ); |
|
841 |
|
842 // Smaller of the two intervals will be taken into use |
|
843 if( iAggressiveBgScanInterval < iBgScanInterval ) |
|
844 { |
|
845 iUsedBgScanInterval = iAggressiveBgScanInterval; |
|
846 } |
|
847 else |
|
848 { |
|
849 iUsedBgScanInterval = iBgScanInterval; |
|
850 } |
|
851 |
|
852 // If the interval changed, update it to P&S |
|
853 if( iUsedBgScanInterval != oldInterval ) |
|
854 { |
|
855 DEBUG2( "CWlanBgScanStates::RefreshUsedInterval() - used interval changed (new: %u, old: %u), publish it via P&S", |
|
856 iUsedBgScanInterval, oldInterval ); |
|
857 TUint32 interval = GetBgInterval(); |
|
858 iProvider.PublishBgScanInterval( interval ); |
|
859 } |
|
860 |
|
861 // Check if scanning has to be cancelled or carried out immediately |
|
862 if( KWlanNoScanning == iUsedBgScanInterval ) |
|
863 { |
|
864 DEBUG( "CWlanBgScanStates::RefreshUsedInterval() - scanning disabled, cancel pending scan" ); |
|
865 // In case scanning was disabled, cancel the pending scan request |
|
866 iProvider.CancelScan(); |
|
867 } |
|
868 else if( iUsedBgScanInterval < oldInterval ) |
|
869 { |
|
870 DEBUG( "CWlanBgScanStates::RefreshUsedInterval() - new interval smaller than the old one, scan immediately" ); |
|
871 // In case the new interval is smaller than the old one, scan |
|
872 // immediately |
|
873 iProvider.CancelScan(); |
|
874 iProvider.Scan( KWlanBgScanMaxDelayExpireImmediately ); |
|
875 } |
|
876 // else |
|
877 // In case the new interval is bigger than the old one, it |
|
878 // is taken into use after the pending scan request completes. |
|
879 } |
|
880 |
|
881 |
|
882 |