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1 /* |
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2 * Copyright (c) 2007-2009 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: Implementation of the WlanNullSendController class |
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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: 15 % |
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20 */ |
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21 |
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22 #include "config.h" |
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23 #include "umacnullsendcontroller.h" |
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24 #include "umacnullsender.h" |
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25 #include "UmacContextImpl.h" |
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26 |
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27 |
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28 // ================= MEMBER FUNCTIONS ======================= |
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29 |
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30 |
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31 // --------------------------------------------------------------------------- |
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32 // |
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33 // --------------------------------------------------------------------------- |
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34 // |
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35 void WlanNullSendController::StartVoiceOverWlanCallMaintenance() |
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36 { |
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37 OsTracePrint( KUmacDetails, (TUint8*) |
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38 ("UMAC: WlanNullSendController::StartVoiceOverWlanCallMaintenance") ); |
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39 |
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40 iFlags |= KVoiceOverWlanCallMaintenanceStarted; |
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41 |
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42 if ( iFlags & KInVoiceCallState ) |
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43 { |
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44 RegisterNoVoiceTimeout( iNoVoiceTimeout ); |
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45 |
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46 if ( ( iWlanContextImpl.UapsdUsedForVoice() ) && |
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47 ( iWlanContextImpl.CurrentDot11PwrMgmtMode() == |
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48 WHA::KPsEnable ) ) |
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49 { |
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50 // U-APSD is used for Voice and we are also in PS mode, |
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51 // so initiate QoS Null Frame sending by arming the timer |
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52 RegisterNullTimeout( iNullTimeout ); |
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53 } |
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54 } |
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55 } |
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56 |
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57 // --------------------------------------------------------------------------- |
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58 // |
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59 // --------------------------------------------------------------------------- |
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60 // |
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61 void WlanNullSendController::ResumeQosNullSending() |
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62 { |
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63 OsTracePrint( KUmacDetails, (TUint8*) |
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64 ("UMAC: WlanNullSendController::ResumeQosNullSending") ); |
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65 |
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66 if ( ( iWlanContextImpl.UapsdUsedForVoice() )&& |
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67 ( iFlags & KInVoiceCallState ) && |
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68 ( iWlanContextImpl.CurrentDot11PwrMgmtMode() == WHA::KPsEnable ) ) |
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69 { |
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70 // U-APSD is used for Voice, we are in Voice Call state and in PS |
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71 // mode, so resume QoS null frame sending by re-arming the timer |
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72 RegisterNullTimeout( iNullTimeout ); |
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73 } |
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74 } |
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75 |
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76 // --------------------------------------------------------------------------- |
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77 // |
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78 // --------------------------------------------------------------------------- |
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79 // |
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80 void WlanNullSendController::OnFrameRx( |
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81 WHA::TQueueId aQueueId, |
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82 TUint aPayloadLength ) |
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83 { |
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84 OsTracePrint( KUmacDetails, (TUint8*) |
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85 ("UMAC: WlanNullSendController::OnFrameRx entry: iFlags: 0x%08x"), |
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86 iFlags ); |
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87 |
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88 if ( iFlags & KVoiceOverWlanCallMaintenanceStarted ) |
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89 { |
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90 if ( iFlags & KInVoiceCallState ) |
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91 { |
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92 // we are already in Voice Call state |
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93 |
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94 const TInt64 KTimeNow( os_systemTime() ); |
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95 |
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96 if ( aQueueId == WHA::EVoice ) |
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97 { |
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98 // and this is a Voice priority frame. |
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99 |
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100 iLatestVoiceRxOrTxInVoiceCallState = KTimeNow; |
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101 } |
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102 else if ( ( aQueueId == WHA::ELegacy ) && |
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103 ( aPayloadLength < |
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104 iBestEffortVoiceRxLengthThreshold ) ) |
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105 { |
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106 iBestEffortVoiceRxTimeStamp[iBestEffortVoiceRxInd] = KTimeNow; |
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107 iBestEffortVoiceRxInd = |
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108 ( iBestEffortVoiceRxInd == |
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109 KBestEffortVoiceRxTimeStampCnt - 1 ) ? 0 : |
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110 ++iBestEffortVoiceRxInd; |
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111 } |
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112 else |
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113 { |
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114 // no action |
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115 } |
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116 } |
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117 else if ( iFlags & KVoiceCallEntryPending ) |
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118 { |
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119 // we are in Voice Call Entry Pending state |
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120 |
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121 if ( aQueueId == WHA::EVoice ) |
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122 { |
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123 // this is a Voice priority frame |
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124 |
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125 ++iVoiceCallEntryRxCount; |
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126 |
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127 OsTracePrint( KUmacDetails, (TUint8*) |
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128 ("UMAC: WlanNullSendController::OnFrameRx: iVoiceCallEntryRxCount is now: %d"), |
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129 iVoiceCallEntryRxCount ); |
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130 |
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131 if ( iVoiceCallEntryRxCount >= iVoiceCallEntryThreshold ) |
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132 { |
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133 // We will enter the Voice Call state |
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134 EnterVoiceCallState(); |
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135 } |
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136 } |
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137 } |
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138 else |
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139 { |
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140 // we are neither in Voice Call Entry Pending nor Voice Call state |
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141 |
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142 if ( aQueueId == WHA::EVoice ) |
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143 { |
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144 // this is a Voice priority frame. |
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145 |
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146 // It is the 1st Voice priority frame in the period starting |
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147 // now |
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148 iVoiceCallEntryRxCount = 1; |
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149 iVoiceCallEntryTxCount = 0; |
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150 |
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151 // We enter the Voice Call Entry Pending state by arming |
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152 // the relevant timer |
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153 |
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154 OsTracePrint( KUmacDetails, (TUint8*) |
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155 ("UMAC: WlanNullSendController::OnFrameRx: Enter Voice Call Entry pending state") ); |
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156 |
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157 RegisterVoiceCallEntryTimeout(); |
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158 } |
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159 } |
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160 } |
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161 } |
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162 |
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163 // --------------------------------------------------------------------------- |
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164 // |
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165 // --------------------------------------------------------------------------- |
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166 // |
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167 void WlanNullSendController::OnFrameTx( WHA::TQueueId aQueueId ) |
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168 { |
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169 OsTracePrint( KUmacDetails, (TUint8*) |
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170 ("UMAC: WlanNullSendController::OnFrameTx entry: iFlags: 0x%08x"), |
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171 iFlags ); |
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172 |
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173 iLatestTx = os_systemTime(); |
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174 |
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175 if ( iFlags & KVoiceOverWlanCallMaintenanceStarted ) |
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176 { |
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177 if ( iFlags & KInVoiceCallState ) |
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178 { |
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179 // we are already in Voice Call state |
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180 |
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181 if ( aQueueId == WHA::EVoice ) |
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182 { |
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183 // and this is a Voice priority frame. |
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184 |
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185 iLatestVoiceRxOrTxInVoiceCallState = iLatestTx; |
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186 } |
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187 } |
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188 else if ( iFlags & KVoiceCallEntryPending ) |
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189 { |
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190 // we are in Voice Call Entry Pending state |
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191 |
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192 if ( aQueueId == WHA::EVoice ) |
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193 { |
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194 // this is a Voice priority frame |
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195 |
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196 ++iVoiceCallEntryTxCount; |
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197 |
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198 OsTracePrint( KUmacDetails, (TUint8*) |
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199 ("UMAC: WlanNullSendController::OnFrameTx: iVoiceCallEntryTxCount is now: %d"), |
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200 iVoiceCallEntryTxCount ); |
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201 |
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202 if ( iVoiceCallEntryTxCount >= iVoiceCallEntryThreshold ) |
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203 { |
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204 // We will enter the Voice Call state |
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205 EnterVoiceCallState(); |
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206 } |
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207 } |
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208 } |
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209 else |
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210 { |
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211 // we are neither in Voice Call Entry Pending nor Voice Call state |
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212 |
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213 if ( aQueueId == WHA::EVoice ) |
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214 { |
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215 // this is a Voice priority frame. |
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216 |
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217 // It is the 1st Voice priority frame in the period starting |
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218 // now |
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219 iVoiceCallEntryTxCount = 1; |
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220 iVoiceCallEntryRxCount = 0; |
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221 |
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222 // We enter the Voice Call Entry Pending state by arming |
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223 // the relevant timer |
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224 |
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225 OsTracePrint( KUmacDetails, (TUint8*) |
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226 ("UMAC: WlanNullSendController::OnFrameTx: Enter Voice Call Entry pending state") ); |
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227 |
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228 RegisterVoiceCallEntryTimeout(); |
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229 } |
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230 } |
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231 } |
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232 } |
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233 |
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234 // --------------------------------------------------------------------------- |
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235 // |
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236 // --------------------------------------------------------------------------- |
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237 // |
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238 void WlanNullSendController::OnVoiceCallEntryTimerTimeout() |
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239 { |
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240 // as this timer expired we are no more in Voice Call Entry Pending state |
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241 OsTracePrint( KUmacDetails, (TUint8*) |
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242 ("UMAC: WlanNullSendController::OnVoiceCallEntryTimerTimeout: exit entry pending (to idle) state") ); |
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243 |
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244 iFlags &= ~KVoiceCallEntryPending; |
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245 } |
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246 |
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247 // --------------------------------------------------------------------------- |
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248 // |
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249 // --------------------------------------------------------------------------- |
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250 // |
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251 void WlanNullSendController::OnNullTimerTimeout() |
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252 { |
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253 OsTracePrint( KUmacDetails, (TUint8*) |
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254 ("UMAC: WlanNullSendController::OnNullTimerTimeout") ); |
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255 |
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256 iFlags &= ~KNullTimerArmed; |
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257 |
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258 if ( iWlanContextImpl.CurrentDot11PwrMgmtMode() == WHA::KPsEnable ) |
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259 { |
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260 // we are still in PS mode (as we were when this timer was |
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261 // armed) |
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262 |
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263 TUint32 KTimeAfterLatestTx ( |
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264 static_cast<TUint32>(os_systemTime() - iLatestTx) ); |
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265 |
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266 if ( KTimeAfterLatestTx >= iNullTimeout ) |
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267 { |
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268 // request a QoS Null Data frame to be sent. |
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269 // However, if there is a frame Tx (of any frame) already pending, |
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270 // we won't request a new frame to be sent. Note that it can really |
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271 // be any frame, i.e. for any AC, as we currently always set all the |
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272 // ACs as trigger enabled if U-APSD is used |
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273 if ( !iWlanContextImpl.UnsentTxPackets() ) |
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274 { |
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275 if ( !iNullSender.TxNullDataFrame( iWlanContextImpl, ETrue ) ) |
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276 { |
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277 // frame was not sent because we didn't get a Tx buffer. |
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278 // In this case we'll skip the sending |
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279 // However, we need to re-arm the timer to trigger the next |
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280 // QoS Null Data frame sending |
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281 RegisterNullTimeout( iNullTimeout ); |
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282 } |
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283 } |
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284 else |
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285 { |
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286 // frame Tx already pending, so we don't ask a QoS Null to be sent |
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287 OsTracePrint( KUmacDetails, (TUint8*) |
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288 ("UMAC: WlanNullSendController::OnNullTimerTimeout: frame Tx already pending. New QoS Null Tx request skipped") ); |
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289 |
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290 // However, we need to re-arm the timer to trigger the next |
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291 // QoS Null Data frame sending |
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292 RegisterNullTimeout( iNullTimeout ); |
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293 } |
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294 } |
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295 else |
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296 { |
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297 // No need to send QoS Null; yet. Re-arm the timer with |
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298 // a suitable timeout relative to the time of the latest Tx |
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299 // in QoS Null frame sending state |
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300 RegisterNullTimeout( iNullTimeout - KTimeAfterLatestTx ); |
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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 // --------------------------------------------------------------------------- |
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306 // |
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307 // --------------------------------------------------------------------------- |
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308 // |
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309 void WlanNullSendController::OnQosNullDataTxCompleted() |
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310 { |
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311 OsTracePrint( KUmacDetails, (TUint8*) |
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312 ("UMAC: WlanNullSendController::OnQosNullDataTxCompleted entry: iFlags: 0x%08x"), |
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313 iFlags ); |
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314 |
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315 if ( iFlags & KVoiceOverWlanCallMaintenanceStarted && |
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316 iFlags & KInVoiceCallState && |
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317 iWlanContextImpl.CurrentDot11PwrMgmtMode() == WHA::KPsEnable ) |
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318 { |
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319 // we are doing Voice over WLAN Call maintenance, in Voice Call |
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320 // state and also in PS mode |
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321 |
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322 // as the previous QoS Null Data, i.e. U-APSD Trigger, Frame has been |
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323 // transmitted, re-arm the timer for the next round |
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324 RegisterNullTimeout( iNullTimeout ); |
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325 } |
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326 |
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327 iLatestTx = os_systemTime(); |
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328 } |
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329 |
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330 // --------------------------------------------------------------------------- |
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331 // |
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332 // --------------------------------------------------------------------------- |
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333 // |
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334 void WlanNullSendController::OnNoVoiceTimerTimeout() |
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335 { |
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336 OsTracePrint( KUmacDetails, (TUint8*) |
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337 ("UMAC: WlanNullSendController::OnNoVoiceTimerTimeout entry: iFlags: 0x%08x"), |
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338 iFlags ); |
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339 |
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340 iFlags &= ~KNoVoiceTimerArmed; |
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341 const TInt64 KTimeNow( os_systemTime() ); |
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342 const TUint32 KTimeAfterLatestVoiceRxOrTxInVoiceCallState ( |
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343 static_cast<TUint32>(KTimeNow - |
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344 iLatestVoiceRxOrTxInVoiceCallState) ); |
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345 |
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346 if ( KTimeAfterLatestVoiceRxOrTxInVoiceCallState >= iNoVoiceTimeout ) |
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347 { |
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348 // no real Voice priority traffic any more. |
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349 |
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350 // check if there still is traffic which may be Voice traffic |
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351 // erroneously tagged as Best Effort priority |
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352 if ( KTimeNow - |
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353 // the oldest time stamp of these frames that we have in our |
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354 // records - or zero if such a time stamp doesn't exist |
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355 iBestEffortVoiceRxTimeStamp[iBestEffortVoiceRxInd] > |
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356 iBestEffortVoiceRxTimeWindow ) |
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357 { |
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358 // exit Voice Call state |
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359 iFlags &= ~KInVoiceCallState; |
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360 |
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361 // Send voice call state change indication to engine |
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362 iWlanContextImpl.iUmac.OnInDicationEvent( EVoiceCallOff ); |
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363 |
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364 OsTracePrint( KUmacDetails, (TUint8*) |
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365 ("UMAC: WlanNullSendController::OnNoVoiceTimerTimeout: Exit Voice Call state") ); |
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366 |
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367 // stop the possibly ongoing Null frame sending by canceling the |
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368 // Null timer |
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369 CancelNullTimeout(); |
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370 } |
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371 else |
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372 { |
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373 OsTracePrint( KUmacDetails, (TUint8*) |
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374 ("UMAC: WlanNullSendController::OnNoVoiceTimerTimeout: Continue in Voice Call state") ); |
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375 |
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376 RegisterNoVoiceTimeout( iNoVoiceTimeout ); |
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377 } |
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378 } |
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379 else |
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380 { |
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381 // don't exit Voice Call state. Re-arm the timer instead with a |
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382 // suitable timeout relative to the latest Voice priority frame |
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383 // Rx or Tx in Voice Call state |
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384 RegisterNoVoiceTimeout( |
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385 iNoVoiceTimeout - KTimeAfterLatestVoiceRxOrTxInVoiceCallState ); |
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386 } |
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387 } |
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388 |
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389 // --------------------------------------------------------------------------- |
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390 // |
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391 // --------------------------------------------------------------------------- |
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392 // |
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393 void WlanNullSendController::OnKeepAliveTimerTimeout() |
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394 { |
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395 OsTracePrint( KUmacDetails, (TUint8*) |
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396 ("UMAC: WlanNullSendController::OnKeepAliveTimerTimeout") ); |
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397 |
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398 iFlags &= ~KKeepAliveTimerArmed; |
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399 |
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400 TUint32 KTimeAfterLatestTx ( |
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401 static_cast<TUint32>(os_systemTime() - iLatestTx) ); |
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402 |
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403 if ( KTimeAfterLatestTx >= iKeepAliveTimeout ) |
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404 { |
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405 // request a regular Null Data frame to be sent |
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406 |
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407 // however, if there is a frame Tx (of any frame) already pending, |
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408 // we won't request a new frame to be sent. |
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409 if ( !iWlanContextImpl.UnsentTxPackets() ) |
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410 { |
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411 if ( !iNullSender.TxNullDataFrame( iWlanContextImpl, EFalse ) ) |
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412 { |
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413 // frame was not sent because we didn't get a Tx buffer. |
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414 // In this case we'll skip the sending |
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415 // However, we need to re-arm the timer to trigger the next |
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416 // Null Data frame sending |
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417 RegisterKeepAliveTimeout( iKeepAliveTimeout ); |
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418 } |
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419 } |
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420 else |
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421 { |
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422 // frame Tx already pending, so we don't ask a Null Data to be sent |
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423 OsTracePrint( KUmacDetails, (TUint8*) |
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424 ("UMAC: WlanNullSendController::OnKeepAliveTimerTimeout: frame Tx already pending. New Null Data Tx request skipped") ); |
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425 |
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426 // However, we need to re-arm the timer to trigger the next |
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427 // Null Data frame sending |
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428 RegisterKeepAliveTimeout( iKeepAliveTimeout ); |
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429 } |
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430 } |
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431 else |
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432 { |
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433 // No need to send keep alive; yet. Re-arm the timer with |
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434 // a suitable timeout relative to the time of the latest frame Tx |
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435 RegisterKeepAliveTimeout( iKeepAliveTimeout - KTimeAfterLatestTx ); |
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436 } |
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437 } |
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438 |
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439 // --------------------------------------------------------------------------- |
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440 // |
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441 // --------------------------------------------------------------------------- |
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442 // |
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443 void WlanNullSendController::RegisterVoiceCallEntryTimeout() |
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444 { |
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445 CancelVoiceCallEntryTimeout(); |
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446 |
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447 iWlanContextImpl.iUmac.RegisterTimeout( |
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448 iVoiceCallEntryTimeout, |
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449 EWlanVoiceCallEntryTimer ); |
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450 |
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451 iFlags |= KVoiceCallEntryPending; |
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452 |
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453 OsTracePrint( KUmacDetails, (TUint8*) |
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454 ("UMAC: WlanNullSendController::RegisterVoiceCallEntryTimeout: timer armed") ); |
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455 } |
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456 |
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457 |
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458 // --------------------------------------------------------------------------- |
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459 // |
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460 // --------------------------------------------------------------------------- |
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461 // |
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462 void WlanNullSendController::RegisterNullTimeout( |
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463 TUint32 aTimeoutInMicroSeconds ) |
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464 { |
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465 CancelNullTimeout(); |
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466 |
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467 iWlanContextImpl.iUmac.RegisterTimeout( |
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468 aTimeoutInMicroSeconds, |
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469 EWlanNullTimer ); |
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470 |
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471 iFlags |= KNullTimerArmed; |
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472 |
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473 OsTracePrint( KUmacDetails, (TUint8*) |
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474 ("UMAC: WlanNullSendController::RegisterNullTimeout: timer armed") ); |
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475 } |
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476 |
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477 // --------------------------------------------------------------------------- |
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478 // |
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479 // --------------------------------------------------------------------------- |
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480 // |
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481 void WlanNullSendController::RegisterNoVoiceTimeout( |
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482 TUint32 aTimeoutInMicroSeconds ) |
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483 { |
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484 CancelNoVoiceTimeout(); |
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485 |
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486 iWlanContextImpl.iUmac.RegisterTimeout( aTimeoutInMicroSeconds, |
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487 EWlanNoVoiceTimer ); |
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488 iFlags |= KNoVoiceTimerArmed; |
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489 |
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490 OsTracePrint( KUmacDetails, (TUint8*) |
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491 ("UMAC: WlanNullSendController::RegisterNoVoiceTimeout: timer armed") ); |
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492 } |
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493 |
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494 // --------------------------------------------------------------------------- |
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495 // |
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496 // --------------------------------------------------------------------------- |
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497 // |
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498 void WlanNullSendController::RegisterKeepAliveTimeout( |
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499 TUint32 aTimeoutInMicroSeconds ) |
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500 { |
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501 CancelKeepAliveTimeout(); |
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502 |
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503 iWlanContextImpl.iUmac.RegisterTimeout( aTimeoutInMicroSeconds, |
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504 EWlanKeepAliveTimer ); |
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505 |
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506 iFlags |= KKeepAliveTimerArmed; |
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507 |
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508 OsTracePrint( KUmacDetails, (TUint8*) |
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509 ("UMAC: WlanNullSendController::RegisterKeepAliveTimeout: timer armed") ); |
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510 } |
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511 |
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512 // --------------------------------------------------------------------------- |
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513 // |
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514 // --------------------------------------------------------------------------- |
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515 // |
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516 void WlanNullSendController::CancelVoiceCallEntryTimeout() |
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517 { |
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518 if ( iFlags & KVoiceCallEntryPending ) |
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519 { |
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520 iWlanContextImpl.iUmac.CancelTimeout( EWlanVoiceCallEntryTimer ); |
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521 |
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522 iFlags &= ~KVoiceCallEntryPending; |
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523 |
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524 OsTracePrint( KUmacDetails, (TUint8*) |
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525 ("UMAC: WlanNullSendController::CancelVoiceCallEntryTimeout: timer cancelled") ); |
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526 } |
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527 } |
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528 |
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529 // --------------------------------------------------------------------------- |
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530 // |
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531 // --------------------------------------------------------------------------- |
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532 // |
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533 void WlanNullSendController::CancelNullTimeout() |
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534 { |
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535 if ( iFlags & KNullTimerArmed ) |
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536 { |
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537 iWlanContextImpl.iUmac.CancelTimeout( EWlanNullTimer ); |
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538 |
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539 iFlags &= ~KNullTimerArmed; |
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540 |
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541 OsTracePrint( KUmacDetails, (TUint8*) |
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542 ("UMAC: WlanNullSendController::CancelNullTimeout: timer cancelled") ); |
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543 } |
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544 } |
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545 |
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546 // --------------------------------------------------------------------------- |
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547 // |
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548 // --------------------------------------------------------------------------- |
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549 // |
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550 void WlanNullSendController::CancelNoVoiceTimeout() |
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551 { |
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552 if ( iFlags & KNoVoiceTimerArmed ) |
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553 { |
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554 iWlanContextImpl.iUmac.CancelTimeout( EWlanNoVoiceTimer ); |
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555 |
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556 iFlags &= ~KNoVoiceTimerArmed; |
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557 |
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558 OsTracePrint( KUmacDetails, (TUint8*) |
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559 ("UMAC: WlanNullSendController::CancelNoVoiceTimeout: timer cancelled") ); |
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560 } |
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561 } |
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562 |
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563 // --------------------------------------------------------------------------- |
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564 // |
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565 // --------------------------------------------------------------------------- |
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566 // |
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567 void WlanNullSendController::CancelKeepAliveTimeout() |
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568 { |
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569 if ( iFlags & KKeepAliveTimerArmed ) |
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570 { |
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571 iWlanContextImpl.iUmac.CancelTimeout( EWlanKeepAliveTimer ); |
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572 |
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573 iFlags &= ~KKeepAliveTimerArmed; |
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574 |
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575 OsTracePrint( KUmacDetails, (TUint8*) |
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576 ("UMAC: WlanNullSendController::CancelKeepAliveTimeout: timer cancelled") ); |
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577 } |
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578 } |
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579 |
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580 // --------------------------------------------------------------------------- |
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581 // |
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582 // --------------------------------------------------------------------------- |
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583 // |
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584 void WlanNullSendController::EnterVoiceCallState() |
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585 { |
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586 OsTracePrint( KUmacDetails, (TUint8*) |
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587 ("UMAC: WlanNullSendController::EnterVoiceCallState") ); |
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588 |
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589 CancelVoiceCallEntryTimeout(); |
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590 |
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591 iFlags |= KInVoiceCallState; |
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592 |
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593 // Send voice call state change indication to engine |
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594 iWlanContextImpl.iUmac.OnInDicationEvent( EVoiceCallOn ); |
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595 |
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596 // arm the No Voice timer so that we also exit the Voice Call |
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597 // state at some point |
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598 iLatestVoiceRxOrTxInVoiceCallState = os_systemTime(); |
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599 RegisterNoVoiceTimeout( iNoVoiceTimeout ); |
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600 |
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601 if ( ( iWlanContextImpl.UapsdUsedForVoice() ) && |
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602 ( iWlanContextImpl.CurrentDot11PwrMgmtMode() == WHA::KPsEnable ) ) |
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603 { |
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604 // U-APSD is used for Voice and we are also in PS mode, |
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605 // so initiate QoS Null Frame sending by arming the timer |
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606 RegisterNullTimeout( iNullTimeout ); |
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607 } |
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608 } |