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1 /* |
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2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Implementation of WLAN Coverage Check 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 #include <wlanmgmtclient.h> |
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20 |
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21 #include "cmwlancoveragecheck.h" |
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22 #include "cmpluginwlan.h" |
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23 #include "cmpluginwlandata.h" |
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24 #include "cmpluginwlandataarray.h" |
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25 #include "cmlogger.h" |
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26 |
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27 |
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28 /** |
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29 * Management frame information element IDs. |
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30 * needed to determine coverage |
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31 */ |
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32 enum T802Dot11InformationElementID |
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33 { |
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34 E802Dot11SsidIE = 0, |
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35 E802Dot11SupportedRatesIE = 1, |
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36 E802Dot11FhParameterSetIE = 2, |
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37 E802Dot11DsParameterSetIE = 3, |
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38 E802Dot11CfParameterSetIE = 4, |
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39 E802Dot11TimIE = 5, |
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40 E802Dot11IbssParameterSetIE = 6, |
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41 E802Dot11CountryIE = 7, |
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42 E802Dot11HoppingPatternParamIE = 8, |
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43 E802Dot11HoppingPatternTableIE = 9, |
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44 E802Dot11RequestIE = 10, |
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45 |
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46 E802Dot11ChallengeTextIE = 16, |
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47 // Reserved for challenge text extension 17 - 31 |
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48 E802Dot11ErpInformationIE = 42, |
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49 E802Dot11ExtendedRatesIE = 50, |
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50 E802Dot11AironetIE = 133, |
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51 E802Dot11ApIpAddressIE = 149, |
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52 E802Dot11RsnIE = 221 |
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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 * Bit masks for Capability Information field. |
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58 */ |
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59 enum T802Dot11CapabilityBitMask |
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60 { |
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61 E802Dot11CapabilityEssMask = 0x0001, |
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62 E802Dot11CapabilityIbssMask = 0x0002, |
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63 E802Dot11CapabilityCfPollableMask = 0x0004, |
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64 E802Dot11CapabilityCfPollRequestMask= 0x0008, |
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65 E802Dot11CapabilityPrivacyMask = 0x0010, |
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66 E802Dot11ShortPreambleMask = 0x0020, |
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67 E802Dot11PbccMask = 0x0040, |
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68 E802Dot11ChannelAgilityMask = 0x0080 |
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69 }; |
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70 |
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71 |
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72 // ======================= MEMBER FUNCTIONS ================================= |
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73 |
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74 // ---------------------------------------------------------------------------- |
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75 // CCmWlanCoverageCheck::CCmWlanCoverageCheck() |
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76 // ---------------------------------------------------------------------------- |
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77 // |
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78 CCmWlanCoverageCheck::CCmWlanCoverageCheck() : CActive( EPriorityStandard ) |
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79 { |
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80 CActiveScheduler::Add( this ); |
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81 } |
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82 |
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83 // ---------------------------------------------------------------------------- |
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84 // CCmWlanCoverageCheck::~CCmWlanCoverageCheck() |
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85 // ---------------------------------------------------------------------------- |
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86 // |
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87 CCmWlanCoverageCheck::~CCmWlanCoverageCheck() |
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88 { |
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89 Cancel(); |
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90 } |
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91 |
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92 // ---------------------------------------------------------------------------- |
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93 // CCmWlanCoverageCheck::DoCancel |
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94 // ---------------------------------------------------------------------------- |
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95 // |
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96 void CCmWlanCoverageCheck::DoCancel() |
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97 { |
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98 iWait.AsyncStop(); |
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99 } |
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100 |
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101 // ---------------------------------------------------------------------------- |
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102 // CCmWlanCoverageCheck::RunL |
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103 // ---------------------------------------------------------------------------- |
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104 // |
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105 void CCmWlanCoverageCheck::RunL() |
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106 { |
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107 CLOG_WRITE( "RunL entered" ); |
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108 switch( iProgState ) |
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109 { |
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110 case EScanning: |
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111 { |
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112 if( !iStatus.Int() ) |
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113 // The list is ready |
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114 { |
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115 iProgState = EDone; |
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116 iWait.AsyncStop(); |
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117 } |
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118 else |
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119 // something went wrong -> no coverage. |
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120 { |
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121 iWait.AsyncStop(); |
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122 } |
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123 } |
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124 break; |
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125 case EDone: |
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126 { |
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127 iWait.AsyncStop(); |
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128 } |
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129 break; |
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130 |
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131 default: |
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132 { |
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133 User::Leave( KErrCorrupt ); |
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134 } |
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135 } |
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136 } |
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137 |
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138 |
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139 |
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140 // ---------------------------------------------------------------------------- |
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141 // CCmWlanCoverageCheck::GetCoverageL |
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142 // ---------------------------------------------------------------------------- |
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143 // |
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144 TInt CCmWlanCoverageCheck::GetCoverageL() |
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145 { |
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146 LOGGER_ENTERFN( "CCmWlanCoverageCheck::GetCoverageL" ); |
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147 |
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148 iProgState = EServiceStatus; |
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149 iCoverage = 0; |
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150 |
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151 CWlanMgmtClient* wlanMgmt = CWlanMgmtClient::NewL(); |
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152 CleanupStack::PushL( wlanMgmt ); |
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153 |
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154 CWlanScanInfo* scanInfo = CWlanScanInfo::NewL(); |
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155 CleanupStack::PushL( scanInfo ); |
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156 |
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157 iProgState = EScanning; |
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158 |
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159 wlanMgmt->GetScanResults( iStatus, *scanInfo ); |
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160 |
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161 SetActive(); |
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162 iWait.Start(); |
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163 |
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164 // now we have the results and might start to work on them... |
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165 if ( iProgState == EDone ) |
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166 { //finished without error, work on the result... |
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167 CCmPluginWlanDataArray* wlandataarray = new ( ELeave ) |
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168 CCmPluginWlanDataArray(); |
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169 CleanupStack::PushL( wlandataarray ); |
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170 |
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171 for ( scanInfo->First(); !scanInfo->IsDone(); scanInfo->Next() ) |
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172 { |
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173 // iWlanNetworks cannot be modified 'directly' in |
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174 // a const method (like GetBoolAttributeL), so we have to |
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175 // cast away the constness. |
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176 |
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177 // not simply count as before, but check if it is hidden, |
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178 // and do not allow duplicates... |
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179 TBool isHidden( EFalse ); |
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180 |
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181 TUint8 ieLen( 0 ); |
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182 const TUint8* ieData; |
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183 TBuf8<KWlanMaxSsidLength> ssid8; |
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184 |
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185 TInt ret = scanInfo->InformationElement( E802Dot11SsidIE, ieLen, |
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186 &ieData ); |
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187 if ( ret == KErrNone ) |
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188 { |
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189 isHidden = IsHiddenSsid( ieLen, ieData ); |
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190 if ( !isHidden ) |
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191 { |
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192 // get the ssid |
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193 ssid8.Copy( ieData, ieLen ); |
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194 HBufC* tmp = HBufC::NewLC(KWlanMaxSsidLength); |
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195 TPtr tmpptr( tmp->Des() ); |
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196 |
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197 tmpptr.Copy(ssid8); |
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198 // get the signal strength |
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199 TUint8 rxLevel8 = scanInfo->RXLevel(); |
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200 TInt rxLevel = static_cast< TInt >( rxLevel8 ); |
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201 |
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202 // now add it to an array of CCmPluginWlanData, |
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203 // as it is not hidden |
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204 // the adding function should handle uniqeness and |
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205 // signal strength checking, it should contain only |
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206 // the strongest signal! |
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207 AddToArrayIfNeededL( *wlandataarray, rxLevel, tmpptr ); |
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208 |
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209 CleanupStack::PopAndDestroy( tmp ); |
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210 } |
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211 } |
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212 else |
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213 { |
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214 User::Leave( ret ); |
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215 } |
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216 } |
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217 iCoverage = wlandataarray->Count(); |
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218 |
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219 CleanupStack::PopAndDestroy( wlandataarray ); |
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220 |
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221 CleanupStack::PopAndDestroy( 2, wlanMgmt ); |
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222 } |
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223 else |
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224 { |
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225 User::LeaveIfError( iStatus.Int() ); |
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226 } |
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227 |
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228 return iCoverage; |
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229 } |
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230 |
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231 // --------------------------------------------------------- |
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232 // CCmWlanCoverageCheck::IsHiddenSsid |
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233 // --------------------------------------------------------- |
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234 // |
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235 TBool CCmWlanCoverageCheck::IsHiddenSsid( TUint aSsidLength, |
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236 const TUint8* aSsid ) const |
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237 { |
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238 LOGGER_ENTERFN( "CCmWlanCoverageCheck::IsHiddenSsid" ); |
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239 |
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240 const TUint8 CSPACE = 0x20; |
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241 TBool result( EFalse ); |
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242 TBool result2( ETrue ); |
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243 |
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244 if ( !aSsidLength ) |
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245 { |
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246 result = ETrue; |
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247 } |
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248 |
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249 TInt count( 0 ); |
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250 TUint8 temp( 0x00 ); |
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251 |
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252 for ( TUint i( 0 ); i < aSsidLength; ++i ) |
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253 { |
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254 temp = aSsid[i]; |
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255 count += temp; // in hidden networks characters are: 0x00 |
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256 result2 &= temp == CSPACE ; |
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257 } |
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258 |
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259 if( !count || result2 ) |
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260 { |
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261 result = ETrue; |
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262 } |
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263 |
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264 return result; |
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265 } |
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266 |
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267 |
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268 // --------------------------------------------------------- |
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269 // CCmWlanCoverageCheck::AddToArrayIfNeededL |
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270 // --------------------------------------------------------- |
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271 // |
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272 void CCmWlanCoverageCheck::AddToArrayIfNeededL( |
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273 CCmPluginWlanDataArray& aArray, |
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274 TInt aRXLevel, |
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275 TDesC& aNetworkName ) const |
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276 { |
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277 LOGGER_ENTERFN( "CCmWlanCoverageCheck::AddToArrayIfNeededL" ); |
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278 |
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279 // first check if it is already in the array |
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280 |
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281 TBool found( EFalse ); |
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282 TInt index( 0 ); |
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283 TInt count = aArray.Count(); |
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284 |
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285 while( ( index < count ) && !found ) |
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286 { |
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287 if( ( aArray )[index]->iNetworkName->Compare( aNetworkName ) ) |
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288 { |
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289 ++index; |
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290 } |
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291 else |
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292 { |
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293 found = ETrue; |
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294 } |
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295 } |
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296 |
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297 TSignalStrength strength = ( TSignalStrength )aRXLevel; |
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298 if ( found ) |
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299 { |
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300 // if already exists, check signal strengths |
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301 TSignalStrength signal = ( aArray )[index]->iSignalStrength; |
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302 |
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303 // set to higher value |
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304 ( aArray )[index]->iSignalStrength = |
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305 signal < strength ? signal : strength ; |
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306 } |
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307 else |
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308 { |
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309 // new element, add it to array with signal strength!! |
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310 CCmPluginWlanData* data = CCmPluginWlanData::NewLC(); |
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311 data->iNetworkName = aNetworkName.AllocL(); |
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312 data->iSignalStrength = strength; |
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313 aArray.AppendL( data ); |
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314 CleanupStack::Pop( data ); // item owned by list! |
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315 } |
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316 } |
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317 |
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318 |
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319 // ---------------------------------------------------------------------------- |
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320 // CCmWlanCoverageCheck::ScanForPromptedSsidL |
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321 // ---------------------------------------------------------------------------- |
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322 // |
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323 TBool CCmWlanCoverageCheck::ScanForPromptedSsidL( TWlanSsid aEnteredSsid, |
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324 TBool aBroadcast, |
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325 TWlanNetMode& aNetworkMode, |
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326 TWlanConnectionExtentedSecurityMode& aSecurityMode, |
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327 TBool& aProtectedSetupSupported ) |
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328 { |
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329 LOGGER_ENTERFN( "CCmWlanCoverageCheck::ScanForPromptedSsidL" ); |
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330 |
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331 TBool found = EFalse; |
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332 |
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333 iProgState = EServiceStatus; |
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334 |
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335 CWlanMgmtClient* wlanMgmt = CWlanMgmtClient::NewL(); |
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336 CleanupStack::PushL( wlanMgmt ); |
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337 |
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338 CWlanScanInfo* scanInfo = CWlanScanInfo::NewL(); |
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339 CleanupStack::PushL( scanInfo ); |
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340 |
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341 iProgState = EScanning; |
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342 |
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343 if ( aBroadcast ) |
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344 { |
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345 wlanMgmt->GetScanResults( iStatus, *scanInfo ); |
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346 } |
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347 else |
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348 { |
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349 wlanMgmt->GetScanResults( aEnteredSsid, iStatus, *scanInfo ); |
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350 } |
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351 |
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352 SetActive(); |
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353 iWait.Start(); |
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354 |
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355 // now we have the results and might start to work on them... |
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356 if ( iProgState == EDone ) |
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357 { //finished without error, work on the result... |
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358 TSignalStrength signalStrength = ESignalStrengthMin; |
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359 |
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360 for ( scanInfo->First(); !scanInfo->IsDone(); scanInfo->Next() ) |
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361 { |
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362 TUint8 ieLen( 0 ); |
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363 const TUint8* ieData; |
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364 TBuf8<KWlanMaxSsidLength> ssid8; |
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365 |
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366 TInt ret = scanInfo->InformationElement( E802Dot11SsidIE, ieLen, |
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367 &ieData ); |
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368 if ( ret == KErrNone ) |
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369 { |
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370 // get the ssid |
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371 ssid8.Copy( ieData, ieLen ); |
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372 |
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373 if ( !aEnteredSsid.Compare( ssid8 ) ) |
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374 { |
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375 // get the signal strength |
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376 TUint8 rxLevel8 = scanInfo->RXLevel(); |
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377 TInt rxLevel = static_cast< TInt >( rxLevel8 ); |
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378 |
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379 TSignalStrength strength = ( TSignalStrength )rxLevel; |
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380 if ( !found || ( found && strength < signalStrength ) ) |
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381 { |
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382 found = ETrue; |
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383 signalStrength = strength; |
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384 |
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385 aNetworkMode = ( scanInfo->Capability() & |
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386 E802Dot11CapabilityEssMask ) ? |
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387 EInfra : EAdhoc; |
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388 aSecurityMode = scanInfo->ExtendedSecurityMode(); |
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389 |
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390 aProtectedSetupSupported = |
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391 scanInfo->IsProtectedSetupSupported(); |
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392 } |
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393 } |
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394 } |
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395 else |
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396 { |
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397 User::Leave( ret ); |
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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 CleanupStack::PopAndDestroy( scanInfo ); |
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403 CleanupStack::PopAndDestroy( wlanMgmt ); |
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404 } |
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405 else |
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406 { |
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407 User::LeaveIfError( iStatus.Int() ); |
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408 } |
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409 |
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410 return found; |
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411 } |
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412 |
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413 |