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1 /* |
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2 * Copyright (c) 2005-2008 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 WlanDot11IbssScanningMode 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: 17 % |
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20 */ |
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21 |
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22 #include "config.h" |
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23 #include "umacdot11ibssscanningmode.h" |
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24 #include "umacscanfsmcntx.h" |
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25 #include "UmacContextImpl.h" |
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26 #include "UmacWsaWriteMib.h" |
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27 #include "UmacWsaScan.h" |
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28 #include "umacwhastopscan.h" |
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29 #include "umacwhatodot11typeconverter.h" |
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30 |
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31 #ifndef NDEBUG |
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32 const TInt8 WlanDot11IbssScanningMode::iName[] = "dot11-ibssscanningmode"; |
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33 |
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34 const TUint8 WlanDot11IbssScanningMode::iStateName |
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35 [ESTATEMAX][KMaxStateStringLength] = |
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36 { |
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37 {"EINIT"}, |
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38 {"EEXECUTESCANFSM"}, |
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39 {"ECONTINUEDOT11TRAVERSE"} |
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40 }; |
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41 |
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42 const TUint8 WlanDot11IbssScanningMode::iEventName |
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43 [EEVENTMAX][KMaxEventStringLength] = |
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44 { |
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45 {"ESTATEENTRY"}, |
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46 {"ETXCOMPLETE"}, |
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47 {"ESTARTSCANNINGMODE"}, |
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48 {"ESCANMODERUNNING"}, |
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49 {"ESTOPSCANNINGMODE"}, |
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50 {"ESCANNINGMODEEXIT"}, |
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51 {"EABORT"} |
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52 }; |
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53 #endif |
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54 |
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55 // ======== MEMBER FUNCTIONS ======== |
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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 WlanDot11IbssScanningMode::~WlanDot11IbssScanningMode() |
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62 { |
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63 iCtxImpl = NULL; |
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64 iSSID = NULL; |
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65 iChannels = NULL; |
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66 iPimpl = NULL; |
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67 } |
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68 |
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69 // ----------------------------------------------------------------------------- |
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70 // |
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71 // ----------------------------------------------------------------------------- |
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72 // |
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73 void WlanDot11IbssScanningMode::Set( |
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74 WlanContextImpl& aCtxImpl ) |
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75 { |
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76 iCtxImpl = &aCtxImpl; |
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77 } |
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78 |
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79 // ----------------------------------------------------------------------------- |
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80 // |
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81 // ----------------------------------------------------------------------------- |
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82 // |
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83 void WlanDot11IbssScanningMode::Set( |
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84 WlanContextImpl& /*aCtxImpl*/, |
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85 TScanMode aMode, |
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86 const TSSID& aSSID, |
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87 TUint32 aScanRate, |
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88 SChannels& aChannels, |
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89 TUint32 aMinChannelTime, |
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90 TUint32 aMaxChannelTime, |
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91 TBool aSplitScan ) |
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92 { |
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93 // we can store pointers as oid parameters are guaranteed to be valid |
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94 // to the point the corresponding completion method is called |
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95 iMode = aMode; |
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96 iSSID = &aSSID; |
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97 iScanRate = aScanRate; |
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98 iChannels = &aChannels; |
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99 iMinChannelTime = aMinChannelTime; |
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100 iMaxChannelTime = aMaxChannelTime; |
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101 iSplitScan = aSplitScan; |
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102 } |
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103 |
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104 // ----------------------------------------------------------------------------- |
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105 // The internal state transition method. |
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106 // It is guaranteed by the FSM framework that no WHA command is pending |
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107 // when this method is entered |
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108 // ----------------------------------------------------------------------------- |
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109 // |
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110 void WlanDot11IbssScanningMode::ChangeInternalState( |
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111 WlanContextImpl& aCtxImpl, |
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112 TState aNewState ) |
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113 { |
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114 iState = aNewState; |
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115 Fsm( aCtxImpl, ESTATEENTRY ); |
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116 } |
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117 |
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118 // ----------------------------------------------------------------------------- |
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119 // The event dispatcher method. |
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120 // It is guaranteed by the FSM framework that no WHA command is pending |
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121 // when this method is entered |
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122 // ----------------------------------------------------------------------------- |
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123 // |
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124 void WlanDot11IbssScanningMode::Fsm( |
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125 WlanContextImpl& aCtxImpl, |
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126 TEvent aEvent ) |
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127 { |
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128 OsTracePrint( KScan, |
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129 (TUint8*)("UMAC * dot11-ibssscanningmode * FSM EVENT") ); |
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130 #ifndef NDEBUG |
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131 OsTracePrint( KScan, (TUint8*)("event:")); |
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132 OsTracePrint( KScan, iEventName[aEvent] ); |
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133 OsTracePrint( KScan, (TUint8*)("state:")); |
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134 OsTracePrint( KScan, iStateName[iState] ); |
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135 #endif |
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136 |
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137 switch ( aEvent ) |
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138 { |
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139 case ESTATEENTRY: |
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140 OnStateEntryEvent( aCtxImpl ); |
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141 break; |
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142 case ETXCOMPLETE: |
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143 OnTxCompleteEvent( aCtxImpl ); |
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144 break; |
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145 case ESTARTSCANNINGMODE: |
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146 OnStartScanningModeEvent( aCtxImpl ); |
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147 break; |
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148 case ESCANMODERUNNING: |
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149 OnScanModeRunningEvent( aCtxImpl ); |
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150 break; |
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151 case ESTOPSCANNINGMODE: |
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152 OnStopScanningModeEvent( aCtxImpl ); |
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153 break; |
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154 case ESCANNINGMODEEXIT: |
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155 OnScanningModeExitEvent( aCtxImpl ); |
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156 break; |
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157 case EABORT: |
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158 OnAbortEvent( aCtxImpl ); |
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159 break; |
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160 default: |
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161 // catch internal FSM programming error |
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162 #ifndef NDEBUG |
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163 OsTracePrint( KErrorLevel, (TUint8*)("event:")); |
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164 OsTracePrint( KErrorLevel, iEventName[aEvent] ); |
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165 #endif |
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166 OsAssert( (TUint8*)("* UMAC * panic"), |
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167 (TUint8*)(WLAN_FILE), __LINE__ ); |
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168 break; |
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169 } |
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170 } |
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171 |
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172 // ----------------------------------------------------------------------------- |
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173 // Handler for the event. |
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174 // It is guaranteed by the FSM framework that no WHA command is pending |
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175 // when this method is entered |
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176 // ----------------------------------------------------------------------------- |
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177 // |
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178 void WlanDot11IbssScanningMode::OnStateEntryEvent( |
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179 WlanContextImpl& aCtxImpl ) |
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180 { |
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181 switch ( iState ) |
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182 { |
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183 case EINIT: |
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184 iPimpl = static_cast<WlanScanFsmCntx*> |
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185 (os_alloc( sizeof(WlanScanFsmCntx) )); |
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186 if ( iPimpl ) |
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187 { |
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188 // allocation success |
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189 new (iPimpl) WlanScanFsmCntx( *this ); |
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190 // start fsm traversal |
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191 ChangeInternalState( aCtxImpl, EEXECUTESCANFSM ); |
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192 } |
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193 else |
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194 { |
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195 // allocation failure |
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196 Fsm( aCtxImpl, EABORT ); |
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197 } |
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198 |
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199 break; |
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200 case EEXECUTESCANFSM: |
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201 ExecuteScanFsm( aCtxImpl ); |
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202 break; |
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203 case ECONTINUEDOT11TRAVERSE: |
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204 ContinueDot11StateTraversal( aCtxImpl ); |
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205 break; |
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206 default: |
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207 // cath internal FSM programming error |
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208 #ifndef NDEBUG |
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209 OsTracePrint( KErrorLevel, (TUint8*)("state:")); |
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210 OsTracePrint( KErrorLevel, iStateName[iState] ); |
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211 #endif |
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212 OsAssert( (TUint8*)("* UMAC * panic"), |
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213 (TUint8*)(WLAN_FILE), __LINE__ ); |
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214 break; |
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215 } |
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216 } |
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217 |
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218 // ----------------------------------------------------------------------------- |
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219 // Handler for the event. |
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220 // It is guaranteed by the FSM framework that no WHA command is pending |
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221 // when this method is entered |
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222 // ----------------------------------------------------------------------------- |
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223 // |
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224 void WlanDot11IbssScanningMode::OnTxCompleteEvent( |
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225 WlanContextImpl& /*aCtxImpl*/ ) const |
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226 { |
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227 switch ( iState ) |
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228 { |
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229 case EEXECUTESCANFSM: |
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230 // we are running the scan fsm |
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231 // and we have nothing to do here |
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232 break; |
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233 default: |
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234 // catch internal FSM programming error |
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235 #ifndef NDEBUG |
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236 OsTracePrint( KErrorLevel, (TUint8*)("state:")); |
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237 OsTracePrint( KErrorLevel, iStateName[iState] ); |
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238 #endif |
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239 OsAssert( (TUint8*)("* UMAC * panic"), |
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240 (TUint8*)(WLAN_FILE), __LINE__ ); |
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241 break; |
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242 } |
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243 } |
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244 |
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245 // ----------------------------------------------------------------------------- |
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246 // Handler for the event. |
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247 // It is guaranteed by the FSM framework that no WHA command is pending |
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248 // when this method is entered |
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249 // ----------------------------------------------------------------------------- |
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250 // |
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251 void WlanDot11IbssScanningMode::OnStartScanningModeEvent( |
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252 WlanContextImpl& aCtxImpl ) |
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253 { |
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254 // start the scanning mode |
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255 |
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256 // convert scan parameters to WHA types |
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257 // Note that we need to deallocate the memory from whaChannels |
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258 // - which is allocated in ConvertToWhaTypes() - when we are done |
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259 |
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260 WHA::SSSID* wha_ssid = |
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261 static_cast<WHA::SSSID*>(os_alloc( sizeof(WHA::SSSID) )); |
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262 if ( !wha_ssid ) |
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263 { |
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264 // memory allocation failue; that's fatal |
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265 Fsm( aCtxImpl, EABORT ); |
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266 return; |
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267 } |
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268 |
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269 WHA::SChannels* wha_channels( NULL ); |
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270 TUint8 wha_channelcount( 0 ); |
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271 |
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272 if ( !(WlanWhaToDot11TypeConverter::ConvertToWhaTypes( |
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273 aCtxImpl, |
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274 iSSID, |
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275 *wha_ssid, |
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276 iChannels, |
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277 iMinChannelTime, |
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278 iMaxChannelTime, |
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279 wha_channels, |
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280 wha_channelcount )) ) |
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281 { |
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282 // memory allocation failue; that's fatal |
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283 os_free( wha_ssid ); |
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284 Fsm( aCtxImpl, EABORT ); |
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285 } |
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286 else |
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287 { |
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288 // start the scanning process |
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289 |
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290 const TUint8 KNbrOfProbeReqsPerCh = 2; |
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291 const TUint8 KNoProbeReqs = 0; |
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292 const TUint8 KNbrOfSsids = 1; |
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293 const TUint8 KNoSsids = 0; |
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294 |
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295 // 1st set the context |
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296 aCtxImpl.WsaScan().Set( |
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297 aCtxImpl, |
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298 iScanRate, |
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299 iChannels->iBand, |
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300 wha_channelcount, |
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301 wha_channels, |
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302 WHA::EFgScan, |
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303 (iMode == EActiveScan) ? KNbrOfProbeReqsPerCh : KNoProbeReqs, |
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304 iSplitScan, |
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305 wha_ssid->iSSIDLength ? KNbrOfSsids : KNoSsids, |
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306 wha_ssid ); |
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307 |
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308 // change global state: entry procedure triggers action |
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309 ChangeState( aCtxImpl, |
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310 *this, // prev state |
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311 aCtxImpl.WsaScan() // next state |
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312 ); |
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313 |
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314 // as the parameters have been supplied we can now deallocate |
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315 os_free( wha_ssid ); |
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316 os_free( wha_channels ); |
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317 } |
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318 } |
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319 |
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320 // ----------------------------------------------------------------------------- |
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321 // Handler for the event. |
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322 // It is guaranteed by the FSM framework that no WHA command is pending |
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323 // when this method is entered |
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324 // ----------------------------------------------------------------------------- |
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325 // |
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326 void WlanDot11IbssScanningMode::OnScanModeRunningEvent( |
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327 WlanContextImpl& aCtxImpl ) const |
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328 { |
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329 // complete the scan request |
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330 |
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331 OsTracePrint( KScan, (TUint8*) |
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332 ("UMAC: WlanDot11IbssScanningMode::OnScanModeRunningEvent: Complete scan request") ); |
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333 OnOidComplete( aCtxImpl ); |
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334 } |
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335 |
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336 // ----------------------------------------------------------------------------- |
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337 // Handler for the event. |
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338 // It is guaranteed by the FSM framework that no WHA command is pending |
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339 // when this method is entered |
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340 // ----------------------------------------------------------------------------- |
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341 // |
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342 void WlanDot11IbssScanningMode::OnStopScanningModeEvent( |
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343 WlanContextImpl& aCtxImpl ) |
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344 { |
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345 // change global state: entry procedure triggers action |
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346 ChangeState( aCtxImpl, |
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347 *this, // prev state |
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348 aCtxImpl.WhaStopScan() // next state |
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349 ); |
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350 } |
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351 |
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352 // ----------------------------------------------------------------------------- |
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353 // Handler for the event. |
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354 // It is guaranteed by the FSM framework that no WHA command is pending |
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355 // when this method is entered |
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356 // ----------------------------------------------------------------------------- |
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357 // |
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358 void WlanDot11IbssScanningMode::OnScanningModeExitEvent( |
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359 WlanContextImpl& aCtxImpl ) |
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360 { |
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361 // scanning mode has stopped and so can we |
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362 |
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363 // inform the mgmt client about scan completion |
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364 |
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365 OsTracePrint( KScan, (TUint8*) |
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366 ("UMAC: WlanDot11IbssScanningMode::OnScanningModeExitEvent: Send scan complete indication")); |
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367 |
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368 OnInDicationEvent( aCtxImpl, EScanCompleted ); |
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369 |
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370 // continue with the dot11 state traversal |
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371 ChangeInternalState( aCtxImpl, ECONTINUEDOT11TRAVERSE ); |
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372 } |
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373 |
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374 // --------------------------------------------------------- |
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375 // simulate macnotresponding error |
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376 // --------------------------------------------------------- |
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377 // |
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378 void WlanDot11IbssScanningMode::OnAbortEvent( |
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379 WlanContextImpl& aCtxImpl ) |
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380 { |
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381 OsTracePrint( KWarningLevel, |
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382 (TUint8*)("UMAC * dot11-ibssscanningmode * abort") ); |
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383 |
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384 DoErrorIndication( aCtxImpl, WHA::KErrorMacNotResponding ); |
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385 } |
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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 void WlanDot11IbssScanningMode::ExecuteScanFsm( |
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392 WlanContextImpl& /*aCtxImpl*/ ) |
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393 { |
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394 // start scan fsm |
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395 iPimpl->Current().StartScanningMode( *iPimpl ); |
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396 } |
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397 |
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398 // ----------------------------------------------------------------------------- |
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399 // |
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400 // ----------------------------------------------------------------------------- |
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401 // |
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402 void WlanDot11IbssScanningMode::ContinueDot11StateTraversal( |
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403 WlanContextImpl& aCtxImpl ) |
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404 { |
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405 // return back |
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406 ChangeState( aCtxImpl, |
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407 *this, // prev state |
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408 aCtxImpl.iStates.iIbssNormalMode // next state |
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409 ); |
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410 } |
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411 |
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412 // ----------------------------------------------------------------------------- |
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413 // Handler for WHA command response event. |
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414 // It is guaranteed by the global protocol fsm framework that no WHA command is |
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415 // pending when this method is entered |
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416 // ----------------------------------------------------------------------------- |
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417 // |
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418 void WlanDot11IbssScanningMode::OnWhaCommandResponse( |
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419 WlanContextImpl& aCtxImpl, |
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420 WHA::TCommandId aCommandId, |
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421 WHA::TStatus aStatus, |
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422 const WHA::UCommandResponseParams& aCommandResponseParams, |
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423 TUint32 aAct ) |
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424 { |
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425 if ( aCommandId == WHA::EScanCommandResponse ) |
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426 { |
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427 OsTracePrint( KScan, (TUint8*)("UMAC * OnScanningModeStarted")); |
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428 |
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429 // morph event to the scan fsm |
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430 iPimpl->Current().OnScanningModeStarted( *iPimpl ); |
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431 } |
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432 else if ( aCommandId == WHA::EStopScanResponse ) |
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433 { |
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434 // complete the stop scan request |
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435 |
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436 OsTracePrint( KScan, (TUint8*) |
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437 ("UMAC: WlanDot11IbssScanningMode::OnWhaCommandResponse: complete stop scan request")); |
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438 |
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439 OnOidComplete( aCtxImpl ); |
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440 } |
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441 else |
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442 { |
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443 // this is a response to a command that was not generated |
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444 // by this dot11 state object |
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445 // so let's forward it to the default handler |
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446 WlanDot11State::OnWhaCommandResponse( |
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447 aCtxImpl, |
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448 aCommandId, |
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449 aStatus, |
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450 aCommandResponseParams, |
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451 aAct ); |
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452 } |
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453 } |
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454 |
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455 // ----------------------------------------------------------------------------- |
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456 // Handler for WHA command completion event. |
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457 // It is guaranteed by the global protocol fsm framework that no WHA command is |
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458 // pending when this method is entered |
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459 // ----------------------------------------------------------------------------- |
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460 // |
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461 TBool WlanDot11IbssScanningMode::CommandComplete( |
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462 WlanContextImpl& /*aCtxImpl*/, |
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463 WHA::TCompleteCommandId aCompleteCommandId, |
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464 WHA::TStatus /*aStatus*/, |
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465 const WHA::UCommandCompletionParams& /*aCommandCompletionParams*/ ) |
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466 { |
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467 if ( aCompleteCommandId != WHA::EScanComplete ) |
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468 { |
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469 // implementation error as this can be the only one |
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470 OsAssert( (TUint8*)("UMAC: panic"), (TUint8*)(WLAN_FILE), __LINE__ ); |
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471 } |
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472 |
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473 OsTracePrint( KScan, (TUint8*)("UMAC * OnScanningModeStopped")); |
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474 |
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475 // morph event to scan fsm |
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476 iPimpl->Current().OnScanningModeStopped( *iPimpl ); |
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477 |
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478 // as scanning mode has ended we will change dot11 state. |
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479 // Signal it to caller |
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480 return ETrue; |
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481 } |
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482 |
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483 // ----------------------------------------------------------------------------- |
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484 // |
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485 // ----------------------------------------------------------------------------- |
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486 // |
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487 TAny* WlanDot11IbssScanningMode::RequestForBuffer( |
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488 WlanContextImpl& aCtxImpl, |
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489 TUint16 aLength ) |
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490 { |
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491 return aCtxImpl.GetRxBuffer( aLength ); |
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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 WlanDot11IbssScanningMode::OnBeaconFrameRx( |
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499 WlanContextImpl& aCtxImpl, |
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500 const TAny* aFrame, |
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501 const TUint32 aLength, |
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502 WHA::TRcpi aRcpi, |
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503 TUint8* aBuffer ) |
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504 { |
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505 // as we have a beacon frame |
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506 // we will pass it to the client of the mgmt interface |
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507 XferDot11FrameToMgmtClient( aCtxImpl, aFrame, aLength, aRcpi, aBuffer ); |
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508 } |
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509 |
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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 void WlanDot11IbssScanningMode::OnProbeResponseFrameRx( |
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515 WlanContextImpl& aCtxImpl, |
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516 const TAny* aFrame, |
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517 const TUint32 aLength, |
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518 WHA::TRcpi aRcpi, |
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519 TUint8* aBuffer ) |
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520 { |
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521 // as we have a probe response frame |
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522 // we will pass it to the client of the mgmt interface |
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523 XferDot11FrameToMgmtClient( aCtxImpl, aFrame, aLength, aRcpi, aBuffer ); |
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524 } |
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525 |
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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 void WlanDot11IbssScanningMode::Entry( |
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531 WlanContextImpl& aCtxImpl ) |
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532 { |
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533 if ( aCtxImpl.WsaCmdActive() ) |
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534 { |
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535 // sanity checking code |
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536 OsAssert( (TUint8*)("UMAC * panic"), (TUint8*)(WLAN_FILE), __LINE__ ); |
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537 } |
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538 |
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539 // we don't want to do full event dispatching here as we want |
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540 // to run this dot11 state in non pre-emptive mode. |
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541 // However, we do want to handle the scan complete event in case it has |
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542 // been registered |
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543 if ( aCtxImpl.CommandCompletionEventRegistered( WHA::EScanComplete ) ) |
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544 { |
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545 OsTracePrint( KScan, (TUint8*) |
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546 ("UMAC: WlanDot11IbssScanningMode::Entry: Scan complete event registered") ); |
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547 |
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548 aCtxImpl.DispatchCommandCompletionEvent(); |
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549 // in this case we have actually already changed to another state |
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550 // so there's nothing more for us to do here |
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551 } |
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552 else |
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553 { |
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554 // scan complete event not registered. Continue in the normal fashion |
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555 |
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556 if ( iState != EINIT ) |
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557 { |
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558 // this is NOT the start of the the FSM actions |
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559 // note that we send the ETXCOMPLETE event as the states |
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560 // that wait for it are the only ones that can be interrupted |
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561 // as they are asynchronous operations by nature |
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562 // and wait for corresponding WHA completion method |
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563 Fsm( aCtxImpl, ETXCOMPLETE ); |
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564 } |
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565 else |
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566 { |
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567 // this is the start of the FSM actions |
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568 Fsm( aCtxImpl, ESTATEENTRY ); |
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569 } |
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570 } |
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571 } |
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572 |
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573 // ----------------------------------------------------------------------------- |
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574 // |
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575 // ----------------------------------------------------------------------------- |
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576 // |
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577 void WlanDot11IbssScanningMode::Exit( |
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578 WlanContextImpl& /*aCtxImpl*/ ) |
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579 { |
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580 // reset fsm |
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581 iState = EINIT; |
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582 |
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583 // get rid of scan fsm implementation |
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584 iPimpl->~WlanScanFsmCntx(); |
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585 os_free( iPimpl ); |
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586 iPimpl = NULL; |
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587 } |
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588 |
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589 // ----------------------------------------------------------------------------- |
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590 // |
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591 // ----------------------------------------------------------------------------- |
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592 // |
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593 TBool WlanDot11IbssScanningMode::StopScan( WlanContextImpl& /*aCtxImpl*/ ) |
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594 { |
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595 // inform scan fsm that scanning mode stop is desired |
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596 iPimpl->Current().StopScanningMode( *iPimpl ); |
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597 // indicate that a state change has occurred |
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598 return ETrue; |
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599 } |
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600 |
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601 #ifndef NDEBUG |
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602 // ----------------------------------------------------------------------------- |
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603 // |
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604 // ----------------------------------------------------------------------------- |
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605 // |
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606 const TInt8* WlanDot11IbssScanningMode::GetStateName( |
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607 TUint8& aLength ) const |
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608 { |
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609 aLength = sizeof( iName ); |
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610 return iName; |
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611 } |
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612 #endif |
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613 |
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614 // ----------------------------------------------------------------------------- |
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615 // Handler for scan fsm event. |
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616 // It is guaranteed by the FSM framework that no WHA command is pending |
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617 // when this method is entered |
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618 // ----------------------------------------------------------------------------- |
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619 // |
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620 void WlanDot11IbssScanningMode::OnScanFsmEvent( |
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621 MWlanScanFsmCb::TEvent aEvent ) |
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622 { |
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623 OsTracePrint( KScan, (TUint8*) |
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624 ("UMAC * dot11-ibssscanningmode * SCAN FSM EVENT: %d"), aEvent ); |
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625 |
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626 // do what the scan fsm desires |
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627 switch( aEvent ) |
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628 { |
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629 case EFSMSTARTSCANNINGMODE: |
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630 // scanning mode start desired |
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631 Fsm( *iCtxImpl, ESTARTSCANNINGMODE ); |
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632 break; |
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633 case EFSMSCANMODERUNNING: |
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634 // scanning mode is running |
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635 Fsm( *iCtxImpl, ESCANMODERUNNING ); |
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636 break; |
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637 case EFSMSTOPSCANNINGMODE: |
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638 // scanning mode stop desired |
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639 Fsm( *iCtxImpl, ESTOPSCANNINGMODE ); |
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640 break; |
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641 |
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642 case EFSMSCANMODESTOPPED: |
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643 // scanning mode has stopped |
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644 Fsm( *iCtxImpl, ESCANNINGMODEEXIT ); |
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645 break; |
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646 default: |
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647 // catch scan FSM programming error |
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648 OsTracePrint( KErrorLevel, |
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649 (TUint8*)("UMAC* scan fsm event: :%d"), aEvent); |
|
650 OsAssert( (TUint8*)("* UMAC * panic"), |
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651 (TUint8*)(WLAN_FILE), __LINE__ ); |
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652 break; |
|
653 } |
|
654 } |