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1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <bluetooth/logger.h> |
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17 #include <e32base.h> |
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18 #include "rfcommutil.h" |
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19 #include "rfcommmuxer.h" |
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20 #include "rfcommflow.h" |
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21 |
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22 #ifdef __FLOG_ACTIVE |
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23 _LIT8(KLogComponent, LOG_COMPONENT_RFCOMM); |
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24 #endif |
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25 |
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26 /*************************************************************************/ |
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27 |
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28 |
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29 CRfcommFlowStrategyFactory::CRfcommFlowStrategyFactory() |
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30 { |
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31 LOG_FUNC |
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32 // iFlowStrategies.Reset(); // Null all the pointers -- not necessary as array is in CBase class. |
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33 } |
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34 |
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35 CRfcommFlowStrategyFactory::~CRfcommFlowStrategyFactory() |
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36 { |
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37 LOG_FUNC |
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38 // Destroy all the state objects |
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39 iFlowStrategies.DeleteAll(); |
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40 } |
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41 |
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42 CRfcommFlowStrategyFactory* CRfcommFlowStrategyFactory::NewL() |
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43 { |
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44 LOG_STATIC_FUNC |
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45 CRfcommFlowStrategyFactory* factory = new (ELeave) CRfcommFlowStrategyFactory(); |
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46 CleanupStack::PushL(factory); |
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47 // Create all the new states |
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48 factory->iFlowStrategies[EFlowInitial] = new (ELeave) TRfcommFlowStrategyInitial(factory); |
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49 factory->iFlowStrategies[EFlowCreditBased] = new (ELeave) TRfcommFlowStrategyCreditBased(factory); |
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50 factory->iFlowStrategies[EFlowNonCreditBased] = new (ELeave) TRfcommFlowStrategyNonCreditBased(factory); |
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51 // etc... |
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52 CleanupStack::Pop(); |
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53 return factory; |
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54 } |
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55 |
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56 TRfcommFlowStrategy& CRfcommFlowStrategyFactory::GetFlowStrategy(const TFlowStrategies aFlowStrategy) const |
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57 { |
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58 LOG_FUNC |
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59 __ASSERT_DEBUG(aFlowStrategy != EMaxFlowStrategy, Panic(ERfCommFlowStrategyOutOfBounds)); |
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60 return *iFlowStrategies[aFlowStrategy]; |
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61 } |
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62 |
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63 |
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64 |
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65 |
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66 /*************************************************************************/ |
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67 |
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68 |
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69 |
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70 TRfcommFlowStrategy::TRfcommFlowStrategy(CRfcommFlowStrategyFactory* aFactory) |
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71 :iFactory(aFactory) |
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72 { |
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73 LOG_FUNC |
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74 //iFactory = aFactory; |
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75 } |
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76 |
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77 |
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78 TRfcommFlowStrategy::~TRfcommFlowStrategy() |
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79 { |
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80 LOG_FUNC |
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81 } |
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82 |
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83 |
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84 |
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85 |
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86 |
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87 TRfcommFlowStrategyInitial::TRfcommFlowStrategyInitial(CRfcommFlowStrategyFactory* aFactory) |
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88 :TRfcommFlowStrategy(aFactory) |
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89 { |
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90 LOG_FUNC |
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91 } |
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92 |
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93 TRfcommFlowStrategyInitial::~TRfcommFlowStrategyInitial() |
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94 { |
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95 LOG_FUNC |
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96 } |
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97 |
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98 TInt TRfcommFlowStrategyInitial::DataBufferMultiple() |
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99 { |
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100 LOG_FUNC |
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101 return KRfcommSAPBufferMultiple; |
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102 }; |
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103 |
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104 TUint16 TRfcommFlowStrategyInitial::UsableMTU(const CRfcommSAP& aSAP, TUint8 /*aCredit*/) const |
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105 /** |
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106 Available frame space for data |
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107 **/ |
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108 { |
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109 LOG_FUNC |
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110 __ASSERT_DEBUG(aSAP.NegotiatedMTU(), Panic(ERfcommBadCalculatedMTU)); |
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111 |
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112 return aSAP.NegotiatedMTU(); |
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113 } |
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114 |
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115 TBool TRfcommFlowStrategyInitial::AllowWrite(CRfcommSAP& /*aSAP*/) |
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116 /** |
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117 Ignore CBFC Credits |
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118 **/ |
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119 { |
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120 LOG_FUNC |
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121 return ETrue; |
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122 } |
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123 |
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124 TBool TRfcommFlowStrategyInitial::AllowFCOnOff(TBool /*aCommand*/) |
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125 /** |
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126 Always allow 'FC On/Off' commands (not be confused with FC bit in an MSC command!). |
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127 **/ |
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128 { |
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129 LOG_FUNC |
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130 return ETrue; |
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131 } |
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132 |
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133 TInt TRfcommFlowStrategyInitial::PNConvergenceLayer(TBool aCommand) |
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134 /** |
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135 We are negotiating so keep trying for CBFC. |
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136 **/ |
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137 { |
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138 LOG_FUNC |
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139 return aCommand?KCBFCCommandFlag:KCBFCResponseFlag; |
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140 } |
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141 |
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142 TUint8 TRfcommFlowStrategyInitial::PNFinalOctet() // FIXME: Rename to InitialCredit() |
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143 /** |
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144 We are negotiating so keep trying for CBFC. |
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145 **/ |
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146 { |
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147 LOG_FUNC |
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148 return KInitialCredit; |
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149 } |
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150 |
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151 TUint8 TRfcommFlowStrategyInitial::WriteCredit(CRfcommSAP& /*aSAP*/) |
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152 /** |
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153 Return number of CBFC credits to send in UIH frame. |
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154 **/ |
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155 { |
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156 LOG_FUNC |
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157 return 0; |
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158 } |
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159 |
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160 |
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161 void TRfcommFlowStrategyInitial::OutgoingMSCReviseSignals(TBool /*aCommand*/, TUint8& /*aSignals*/) |
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162 /** |
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163 Only requires action for CBFC. |
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164 **/ |
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165 { |
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166 LOG_FUNC |
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167 } |
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168 |
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169 void TRfcommFlowStrategyInitial::ReviseDonatedCredits(CRfcommSAP& /*aSAP*/, TUint8 /*aCredit*/) |
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170 /** |
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171 Only requires action for CBFC. |
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172 **/ |
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173 { |
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174 LOG_FUNC |
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175 } |
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176 |
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177 void TRfcommFlowStrategyInitial::ReviseTransmittedCredits(CRfcommSAP& /*aSAP*/) |
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178 { |
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179 LOG_FUNC |
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180 /** |
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181 Only requires action for CBFC. |
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182 **/ |
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183 } |
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184 |
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185 CRfcommDataFrame* TRfcommFlowStrategyInitial::NewDataFrame(CRfcommMuxer& aMuxer, |
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186 TUint8 aAddr, |
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187 TInt aLen, |
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188 #ifdef _DEBUG |
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189 TUint8 aCredit, |
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190 #else |
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191 TUint8 /*aCredit*/, |
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192 #endif |
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193 |
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194 CRfcommSAP* aSAP) |
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195 /** |
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196 Returns a new data (UIH) frame for the specified DLCI |
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197 |
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198 The C/R bit for the UIH frame is always 1 for the initiator and |
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199 0 for the responder, which is the same as for commands. |
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200 **/ |
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201 { |
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202 LOG_FUNC |
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203 __ASSERT_DEBUG(!aCredit, Panic(ERfcommUnexpectedCBFCCredit)); |
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204 CRfcommDataFrame* frm=NULL; |
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205 TRAPD(err, frm=CRfcommDataFrame::NewL(aLen, aMuxer, aSAP)); |
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206 if(!err) |
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207 { |
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208 frm->SetAddress(aAddr); |
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209 frm->SetControl(KUIHCtrlField); |
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210 } |
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211 return frm; // NB should be NULL if CRfcommDataFrame was not created |
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212 } |
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213 |
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214 TBool TRfcommFlowStrategyInitial::CanProcessNewData(const TBool aAllowProcessNewData) const |
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215 /** |
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216 If a SAP's buffer becomes too full, then that SAP will cause the muxer |
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217 to block any further intake of data. 'aSAPNoFreeSpaceMask' points to the |
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218 relevant muxer flag. |
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219 **/ |
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220 { |
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221 LOG_FUNC |
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222 return aAllowProcessNewData; |
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223 } |
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224 |
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225 void TRfcommFlowStrategyInitial::DecodeLength(TBool /*aCBFC*/, |
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226 TDesC8& /*aPacket*/, |
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227 TInt& /*aCreditBuffer*/, |
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228 TInt& /*aHeaderLengthBuffer*/) |
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229 /** |
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230 Do nothing - not CBFC. |
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231 **/ |
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232 { |
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233 LOG_FUNC |
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234 } |
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235 |
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236 TBool TRfcommFlowStrategyInitial::ProcessDataFrameReviseCredits(CRfcommSAP& /*aSAP*/, |
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237 TBool /*aPoll*/, |
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238 TUint8 /*aCredit*/) |
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239 /** |
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240 Not CBFC - return false => do nothing. |
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241 **/ |
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242 { |
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243 LOG_FUNC |
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244 return EFalse; |
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245 } |
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246 |
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247 TBool TRfcommFlowStrategyInitial::MSC(CRfcommSAP& aSAP, TUint8 aSignals) |
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248 /** |
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249 Respond to flow control aspects of an MSC signal. |
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250 **/ |
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251 { |
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252 LOG_FUNC |
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253 // Set CTS. We're clear to send if flow control is off so this |
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254 // is the inverse of the Flow Control bit |
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255 aSAP.CTS(!(aSignals & KModemSignalFC)); |
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256 if(aSAP.CTS()) |
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257 { |
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258 // Unblock ESOCK to try again (which might block again!) |
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259 return ETrue; |
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260 } |
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261 return EFalse; |
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262 } |
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263 |
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264 void TRfcommFlowStrategyInitial::UpdateRxFlowControlState(CRfcommSAP& aSAP) |
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265 /** |
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266 Do non-CBFC flow control. |
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267 **/ |
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268 { |
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269 LOG_FUNC |
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270 if(aSAP.DataBuffer().Count() + aSAP.Mux()->GetMaxDataSize() <= |
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271 aSAP.DataBuffer().Length()) |
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272 { |
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273 // Let the mux know we can take more data |
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274 //FC |
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275 aSAP.Mux()->SetCanHandleData(aSAP, ETrue); |
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276 } |
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277 |
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278 if(aSAP.DataBuffer().Count() <= aSAP.LowTideMark()) |
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279 { |
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280 if(!aSAP.CTR()) |
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281 { |
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282 // We should send a flow on since we've sent an off |
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283 //FC |
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284 TUint8 signals=aSAP.Signals(); |
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285 signals &= (~KModemSignalFC); |
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286 TInt result=aSAP.Mux()->SendMSC(aSAP, signals); |
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287 if(result == KErrNone) |
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288 { |
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289 // Update state if we sent it, otherwise don't |
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290 aSAP.SetSignals(signals); |
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291 aSAP.CTR(ETrue); |
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292 } |
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293 // |
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294 } |
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295 } |
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296 } |
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297 |
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298 TBool TRfcommFlowStrategyInitial::NewDataReviseCredits(CRfcommSAP& /*aSAP*/, const TDesC8& /*aData*/) |
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299 /** |
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300 Do nothing - SAPWise (CBFC) only. |
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301 **/ |
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302 { |
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303 LOG_FUNC |
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304 return ETrue; |
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305 } |
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306 |
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307 void TRfcommFlowStrategyInitial::NewData(CRfcommSAP& aSAP) |
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308 /** |
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309 Deal with flow control when new data is coming in and CBFC is not on. |
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310 **/ |
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311 { |
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312 LOG_FUNC |
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313 if(aSAP.DataBuffer().Count() + aSAP.Mux()->GetMaxDataSize() >= |
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314 aSAP.DataBuffer().Length()) |
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315 /** |
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316 N.B. CircularBuffers: Length() is MaxLength() and Count() is Length()! |
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317 **/ |
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318 { |
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319 //Tell the mux we canna take any more, capt'n |
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320 aSAP.Mux()->SetCanHandleData(aSAP, EFalse); |
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321 } |
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322 |
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323 if(aSAP.DataBuffer().Count() >= aSAP.HighTideMark()) |
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324 { |
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325 // Now try to send a flow off, if we haven't already |
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326 if(aSAP.CTR()) |
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327 { |
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328 //FC |
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329 TUint8 signals=aSAP.Signals(); |
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330 signals |= KModemSignalFC; |
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331 TInt result=aSAP.Mux()->SendMSC(aSAP, signals); |
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332 if(result == KErrNone) |
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333 { |
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334 // we sent it, so update state |
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335 aSAP.SetSignals(signals); |
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336 aSAP.CTR(EFalse); |
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337 } |
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338 // |
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339 } |
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340 } |
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341 return; |
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342 } |
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343 |
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344 CRfcommFlowStrategyFactory::TFlowStrategies TRfcommFlowStrategyInitial::FlowType() |
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345 { |
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346 LOG_FUNC |
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347 return CRfcommFlowStrategyFactory::EFlowInitial; |
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348 } |
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349 |
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350 |
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351 TRfcommFlowStrategyCreditBased::TRfcommFlowStrategyCreditBased(CRfcommFlowStrategyFactory* aFactory) |
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352 :TRfcommFlowStrategyInitial(aFactory) |
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353 { |
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354 LOG_FUNC |
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355 } |
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356 |
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357 TRfcommFlowStrategyCreditBased::~TRfcommFlowStrategyCreditBased() |
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358 { |
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359 LOG_FUNC |
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360 } |
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361 |
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362 |
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363 TInt TRfcommFlowStrategyCreditBased::DataBufferMultiple() |
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364 { |
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365 LOG_FUNC |
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366 return KRfcommSAPCBFCBufferMultiple; |
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367 }; |
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368 |
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369 TUint16 TRfcommFlowStrategyCreditBased::UsableMTU(const CRfcommSAP& aSAP, TUint8 aCredit) const |
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370 /** |
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371 Available frame space for data |
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372 **/ |
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373 { |
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374 LOG_FUNC |
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375 __ASSERT_DEBUG(aSAP.NegotiatedMTU(), Panic(ERfcommBadCalculatedMTU)); |
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376 |
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377 //Allow for possible credit in header. |
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378 return (STATIC_CAST(TUint16, (aSAP.NegotiatedMTU() - (aCredit?1:0)))); |
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379 } |
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380 |
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381 TBool TRfcommFlowStrategyCreditBased::AllowWrite(CRfcommSAP& aSAP) |
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382 /** |
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383 **/ |
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384 { |
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385 LOG_FUNC |
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386 return aSAP.LocalCredit(); |
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387 } |
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388 |
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389 TBool TRfcommFlowStrategyCreditBased::AllowFCOnOff(TBool aCommand) |
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390 /** |
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391 Allow responses only. Do not transmit an 'FC On/Off' command. |
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392 (not be confused with FC bit in an MSC command!) |
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393 **/ |
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394 { |
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395 LOG_FUNC |
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396 return !aCommand; //N.B. Reverse logic - if command then return 'EFalse' |
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397 } |
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398 |
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399 TUint8 TRfcommFlowStrategyCreditBased::WriteCredit(CRfcommSAP& aSAP) |
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400 /** |
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401 Return number of CBFC credits to send in UIH frame |
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402 **/ |
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403 { |
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404 LOG_FUNC |
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405 return aSAP.FreeCredit(); |
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406 } |
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407 |
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408 void TRfcommFlowStrategyCreditBased::OutgoingMSCReviseSignals(TBool aCommand, TUint8& aSignals) |
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409 /** |
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410 There is a bit that when zero => CTS should be set to true. |
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411 For CBFC this bit must always be zero if we are sending a command. |
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412 Thus we are masking that part of an MSC command which tells the remote |
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413 to switch its CTS off (and so stop sending). |
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414 Required by SPEC. |
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415 **/ |
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416 { |
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417 LOG_FUNC |
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418 if(aCommand) |
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419 aSignals &= (~KModemSignalFC); |
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420 } |
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421 |
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422 void TRfcommFlowStrategyCreditBased::ReviseDonatedCredits(CRfcommSAP& aSAP, TUint8 aCredit) |
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423 /** |
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424 Revise proxy credit (our knowledge of remote credit) upwards by 'aCredit'. |
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425 **/ |
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426 { |
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427 LOG_FUNC |
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428 //credit change |
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429 //Increase proxy credit by 'aCredit'. |
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430 aSAP.ProxyForRemoteCreditAddCredit(aCredit); |
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431 } |
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432 |
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433 void TRfcommFlowStrategyCreditBased::ReviseTransmittedCredits(CRfcommSAP& aSAP) |
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434 /** |
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435 Revise our own credits downward by one. |
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436 Revise proxy credit (our knowledge of remote credit) upwards by 'aCredit'. |
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437 **/ |
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438 { |
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439 LOG_FUNC |
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440 //Decrement allowed transmission credits. |
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441 aSAP.LocalCreditDecrement(); |
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442 } |
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443 |
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444 CRfcommDataFrame* TRfcommFlowStrategyCreditBased::NewDataFrame(CRfcommMuxer& aMuxer, |
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445 TUint8 aAddr, |
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446 TInt aLen, |
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447 TUint8 aCredit, |
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448 CRfcommSAP* aSAP) |
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449 /** |
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450 Returns a new data (UIH) frame for the specified DLCI |
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451 |
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452 The C/R bit for the UIH frame is always 1 for the initiator and |
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453 0 for the responder, which is the same as for commands. |
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454 **/ |
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455 { |
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456 LOG_FUNC |
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457 CRfcommDataFrame* frm=NULL; |
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458 TInt err = 0; |
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459 if(aCredit) |
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460 { |
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461 TRAP(err, frm=CRfcommCreditDataFrame::NewL(aLen, aMuxer, aSAP)); |
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462 if(!err) |
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463 { |
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464 frm->SetAddress(aAddr); |
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465 frm->SetControl(KUIHCBFCCtrlField); //FIXME - redone later |
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466 ((CRfcommCreditDataFrame*)frm)->SetCredit(aCredit); |
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467 } |
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468 } |
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469 else |
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470 { |
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471 TRAP(err, frm=CRfcommDataFrame::NewL(aLen, aMuxer, aSAP)); |
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472 if(!err) |
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473 { |
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474 frm->SetAddress(aAddr); |
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475 frm->SetControl(KUIHCtrlField); //FIXME - redone later ... Poll bit always 0 for UIH |
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476 } |
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477 } |
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478 return frm; // NB should be NULL if CRfcommDataFrame was not created |
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479 } |
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480 |
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481 TBool TRfcommFlowStrategyCreditBased::CanProcessNewData(const TBool /*aAllowProcessNewData*/) const |
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482 /** |
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483 CBFC is on (=>SAP wise flow control). This function is for MUX wide |
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484 flow control, and so should ignore all flags and never block here. |
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485 **/ |
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486 { |
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487 LOG_FUNC |
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488 return ETrue; |
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489 } |
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490 |
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491 void TRfcommFlowStrategyCreditBased::DecodeLength(TBool aCBFC, |
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492 TDesC8& aPacket, |
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493 TInt& aCreditBuffer, |
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494 TInt& aHeaderLengthBuffer) |
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495 /** |
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496 Provides the credit buffer with the sent credit, and revises the |
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497 header length buffer to take credit byte into account. |
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498 **/ |
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499 { |
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500 LOG_FUNC |
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501 TInt cIndex = ((aPacket)[2] & 1)?3:4; |
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502 if (aCBFC) |
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503 { |
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504 aCreditBuffer = aPacket[cIndex]; |
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505 aHeaderLengthBuffer++; // data is 1 byte smaller |
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506 LOG1(_L("RFCOMM: Incoming packet: value in credit field is %d"), aCreditBuffer); |
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507 } |
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508 else |
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509 { |
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510 LOG(_L("RFCOMM: No credit field in incoming packet")); |
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511 } |
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512 } |
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513 |
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514 TBool TRfcommFlowStrategyCreditBased::ProcessDataFrameReviseCredits(CRfcommSAP& aSAP, |
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515 TBool aPoll, |
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516 TUint8 aCredit) |
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517 /** |
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518 Add 'aCredit' (discovered in incoming data frame)to our credit. |
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519 If as a result we have credits when non had previously existed, |
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520 return true to unblock SAP. |
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521 **/ |
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522 //credit change |
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523 { |
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524 LOG_FUNC |
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525 LOG(_L("CRfcommFlowSAPWise::ProcessDataFrameReviseCredits")); |
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526 if (aPoll) |
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527 { |
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528 TBool isUnblock = (!(aSAP.LocalCredit()) && aCredit)?ETrue:EFalse; |
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529 aSAP.LocalCreditAddCredit(aCredit); |
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530 if (isUnblock) |
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531 { |
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532 LOG(_L("RFCOMM: Transmit credit was zero.")); |
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533 if (aSAP.SendBlocked() & CRfcommSAP::EBlockedByMux) |
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534 { |
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535 return ETrue; |
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536 } |
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537 } |
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538 } |
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539 else |
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540 { |
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541 LOG(_L("RFCOMM: Data with no Tx Credit")); |
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542 } |
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543 return EFalse; |
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544 } |
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545 |
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546 TBool TRfcommFlowStrategyCreditBased::MSC(CRfcommSAP& aSAP, TUint8 /*aSignals*/) |
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547 /** |
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548 "Clear To Send" must be set to true. Flow control is handled |
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549 only by credits. See "AllowWrite()". |
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550 **/ |
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551 { |
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552 LOG_FUNC |
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553 aSAP.CTS(ETrue); |
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554 return ETrue; |
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555 } |
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556 |
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557 void TRfcommFlowStrategyCreditBased::UpdateRxFlowControlState(CRfcommSAP& aSAP) |
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558 /** |
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559 Donate credits if possible when data is read off SAPs ring buffer. |
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560 Note: Function was called Read() originally, but actually is independent |
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561 of anything to do with reading. |
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562 **/ |
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563 { |
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564 LOG_FUNC |
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565 if(aSAP.ProxyForRemoteCredit() <= KRfcommCreditsLowWaterMark) |
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566 { |
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567 TUint8 spareCredits = aSAP.FreeCredit(); |
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568 if (spareCredits && spareCredits>=aSAP.ProxyForRemoteCredit()) |
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569 {// We've got a worth while no. of credits to forward. Do a donation. |
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570 aSAP.Mux()->Donate(aSAP, spareCredits); // send an empty frame with credits |
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571 } |
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572 } |
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573 LOG2(_L("RFCOMM: After: RxCr %d, ReUsed (or Free) %d"), aSAP.ProxyForRemoteCredit(), aSAP.FreeCreditCalculation()); |
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574 } |
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575 |
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576 TBool TRfcommFlowStrategyCreditBased::NewDataReviseCredits(CRfcommSAP& aSAP, const TDesC8& aData) |
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577 /** |
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578 Revise proxy credit downwards by one if a frame has arrived containing |
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579 new data. |
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580 **/ |
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581 //credit change |
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582 { |
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583 LOG_FUNC |
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584 if (aData.Length() > 0) |
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585 { |
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586 if (aSAP.ProxyForRemoteCredit() == 0) |
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587 { |
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588 // got to disconnect cos they're ignoring our credits |
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589 LOG(_L("RFCOMM: Data received with 0 receive credit")); |
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590 return EFalse; |
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591 } |
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592 else |
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593 { |
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594 // update remote transmit credit proxy |
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595 aSAP.ProxyForRemoteCreditDecrement(); |
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596 } |
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597 } |
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598 return ETrue; |
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599 } |
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600 |
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601 void TRfcommFlowStrategyCreditBased::NewData(CRfcommSAP& aSAP) |
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602 /** |
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603 If other side have run out of credits, check that we really |
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604 don't have any to send them. This should rarely happen, as |
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605 NotifyNewData tries to forward credits before they run out. |
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606 **/ |
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607 { |
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608 LOG_FUNC |
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609 if (aSAP.ProxyForRemoteCredit() == 0) |
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610 {// they have run out! See if we have any credits |
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611 TUint8 spareCredits = aSAP.FreeCredit(); |
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612 if(spareCredits) |
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613 {// got some credits! Send them. |
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614 aSAP.Mux()->Donate(aSAP, spareCredits); // an empty frame with credits |
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615 } |
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616 } |
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617 return; |
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618 } |
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619 |
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620 CRfcommFlowStrategyFactory::TFlowStrategies TRfcommFlowStrategyCreditBased::FlowType() |
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621 { |
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622 LOG_FUNC |
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623 return CRfcommFlowStrategyFactory::EFlowCreditBased; |
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624 } |
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625 |
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626 |
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627 |
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628 |
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629 |
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630 |
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631 TRfcommFlowStrategyNonCreditBased::TRfcommFlowStrategyNonCreditBased(CRfcommFlowStrategyFactory* aFactory) |
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632 :TRfcommFlowStrategyInitial(aFactory) |
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633 { |
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634 LOG_FUNC |
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635 } |
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636 |
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637 TRfcommFlowStrategyNonCreditBased::~TRfcommFlowStrategyNonCreditBased() |
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638 { |
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639 LOG_FUNC |
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640 } |
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641 |
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642 |
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643 |
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644 TInt TRfcommFlowStrategyNonCreditBased::PNConvergenceLayer(TBool /*aCommand*/) |
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645 /** |
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646 Always allow 'FC On/Off'. |
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647 **/ |
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648 { |
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649 LOG_FUNC |
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650 return 0x00; |
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651 } |
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652 |
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653 TUint8 TRfcommFlowStrategyNonCreditBased::PNFinalOctet() |
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654 /** |
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655 Return 0. |
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656 **/ |
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657 { |
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658 LOG_FUNC |
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659 return 0x00; |
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660 } |
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661 |
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662 |
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663 CRfcommFlowStrategyFactory::TFlowStrategies TRfcommFlowStrategyNonCreditBased::FlowType() |
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664 { |
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665 LOG_FUNC |
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666 return CRfcommFlowStrategyFactory::EFlowNonCreditBased; |
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667 } |
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668 |