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1 // Copyright (c) 1999-2009 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 // Defines classes to implement each state a L2CAP sap can |
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15 // be in. |
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16 // Note we assume for all states that the socket will only send us |
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17 // reasonable state change requests - i.e. it won't call PassiveOpen |
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18 // on a connected socket. We make no such assumption about events |
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19 // coming from the Mux |
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20 // |
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21 // |
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22 |
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23 |
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24 #ifndef L2CAPSAPSTATES_H |
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25 #define L2CAPSAPSTATES_H |
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26 |
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27 #include <e32base.h> |
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28 #include <es_prot.h> |
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29 #include <bt_sock.h> |
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30 |
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31 |
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32 #include "L2CapChannelConfig.h" |
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33 #include "L2types.h" |
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34 |
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35 class CL2CAPConnectionSAP; |
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36 class CL2CAPSAPStateFactory; |
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37 |
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38 class CL2CAPMux; |
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39 |
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40 NONSHARABLE_CLASS(TL2CAPSAPState) |
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41 { |
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42 public: |
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43 friend class CL2CAPConnectionSAP; |
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44 |
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45 TL2CAPSAPState(CL2CAPSAPStateFactory& aFactory); |
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46 |
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47 |
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48 // Events called from the SAP. As we assume that the socket |
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49 // will never send us requests which are invalid for our state, |
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50 // the default is to do nothing. Derived state classes can then |
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51 // simply implement the appropriate bits. |
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52 virtual void Start(CL2CAPConnectionSAP& aSAP) const; |
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53 |
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54 virtual TInt Ioctl(CL2CAPConnectionSAP& aSAP, TUint aLevel, TUint aName, TDes8* aOption) const; |
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55 virtual void CancelIoctl(CL2CAPConnectionSAP& aSAP, TUint aLevel, TUint aName) const; |
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56 virtual void IoctlComplete(CL2CAPConnectionSAP& aSAP, TInt aErr, TUint aLevel, TUint aName, TDesC8* aBuf) const; |
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57 |
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58 virtual void ActiveOpen(CL2CAPConnectionSAP& aSAP) const; |
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59 virtual TInt PassiveOpen(CL2CAPConnectionSAP& aSAP, TUint aQueSize) const; |
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60 virtual void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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61 virtual void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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62 |
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63 virtual TInt Send(CL2CAPConnectionSAP& aSAP, RMBufChain& aData, TUint aFlag) const; |
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64 virtual TInt Read(CL2CAPConnectionSAP& aSAP, RMBufChain& aData) const; |
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65 |
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66 virtual void Bound(CL2CAPConnectionSAP& aSAP) const; |
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67 |
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68 // Events called from the SAP Signal Handler. |
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69 virtual void ChannelConfigured(CL2CAPConnectionSAP& aSAP, |
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70 CL2CapChannelConfig& aConfig, |
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71 CL2CAPMux& aMuxer, |
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72 TL2CAPPort aLocalPort, |
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73 TL2CAPPort aRemotePort); |
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74 |
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75 virtual void ReconfiguringChannel(CL2CAPConnectionSAP& aSAP) const; |
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76 |
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77 virtual void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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78 virtual void CloseOutgoingSDUQueue(CL2CAPConnectionSAP& aSAP) const; |
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79 virtual void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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80 virtual void LinkUp(CL2CAPConnectionSAP& aSAP) const; |
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81 virtual void ChannelOpened(CL2CAPConnectionSAP& aSAP) const; |
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82 |
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83 // Events called from the Data Controller. |
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84 virtual void NewData(CL2CAPConnectionSAP& aSAP) const; |
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85 virtual TInt NewDataAsyncCallBack(CL2CAPConnectionSAP& aSAP) const; |
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86 virtual void CanSend(CL2CAPConnectionSAP& aSAP) const; |
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87 virtual void SDUQueueClosed(CL2CAPConnectionSAP& aSAP) const; |
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88 virtual void DataPlaneError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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89 |
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90 // Events from the security manager. |
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91 virtual void AccessRequestComplete(CL2CAPConnectionSAP& aSignalHandler, TInt aResult) const; |
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92 |
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93 // State Transition Actions. |
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94 virtual void Enter(CL2CAPConnectionSAP& aSAP) const; |
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95 virtual void Exit(CL2CAPConnectionSAP& aSAP) const; |
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96 |
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97 // Helper function. |
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98 void NotifySocketClosed(CL2CAPConnectionSAP& aSAP) const; |
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99 |
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100 protected: |
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101 void StartCalledWhileDisconnected(CL2CAPConnectionSAP& aSAP) const; |
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102 void PanicInState(TL2CAPPanic aPanic) const; |
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103 void DebugPanicInState(TL2CAPPanic aPanic) const; |
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104 |
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105 protected: |
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106 CL2CAPSAPStateFactory& iFactory; // Used to get next state. |
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107 |
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108 private: |
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109 // Forbid copying |
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110 TL2CAPSAPState(const TL2CAPSAPState&); |
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111 const TL2CAPSAPState& operator=(const TL2CAPSAPState&) const; |
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112 }; |
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113 |
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114 |
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115 |
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116 |
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117 /** |
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118 The CLOSED state. |
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119 |
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120 This is the state that newly created saps start in, and the state |
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121 they end in after a communication has closed down or a connection |
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122 failed. |
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123 |
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124 Basically this is a quiescent state from which the sap can go to |
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125 different futures. |
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126 **/ |
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127 |
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128 NONSHARABLE_CLASS(TL2CAPSAPStateClosed) : public TL2CAPSAPState |
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129 { |
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130 public: |
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131 TL2CAPSAPStateClosed(CL2CAPSAPStateFactory& aFactory); |
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132 |
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133 // Events called from the SAP. |
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134 void Start(CL2CAPConnectionSAP& aSAP) const; |
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135 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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136 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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137 |
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138 void ActiveOpen(CL2CAPConnectionSAP& aSAP) const; |
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139 void SDUQueueClosed(CL2CAPConnectionSAP& aSAP) const; |
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140 |
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141 void Bound(CL2CAPConnectionSAP& aSAP) const; |
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142 |
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143 // Events called from the SAP Signal Handler. |
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144 void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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145 void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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146 |
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147 // Events called from the Data Controller. |
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148 TInt NewDataAsyncCallBack(CL2CAPConnectionSAP& aSAP) const; |
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149 |
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150 // State Transition Actions. |
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151 void Enter(CL2CAPConnectionSAP& aSAP) const; |
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152 }; |
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153 |
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154 NONSHARABLE_CLASS(TL2CAPSAPStateChannelPendingBase) : public TL2CAPSAPState |
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155 { |
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156 public: |
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157 TL2CAPSAPStateChannelPendingBase(CL2CAPSAPStateFactory& aFactory); |
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158 |
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159 // Events called from the SAP. |
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160 virtual void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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161 virtual void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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162 |
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163 // Events called from the SAP Signal Handler. |
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164 virtual void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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165 virtual void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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166 }; |
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167 |
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168 NONSHARABLE_CLASS(TL2CAPSAPStatePassiveLinkPending) : public TL2CAPSAPStateChannelPendingBase |
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169 { |
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170 public: |
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171 TL2CAPSAPStatePassiveLinkPending(CL2CAPSAPStateFactory& aFactory); |
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172 |
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173 // Events called from the SAP Signal Handler. |
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174 void LinkUp(CL2CAPConnectionSAP& aSAP) const; |
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175 }; |
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176 |
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177 NONSHARABLE_CLASS(TL2CAPSAPStateActiveLinkPending) : public TL2CAPSAPStateChannelPendingBase |
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178 { |
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179 public: |
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180 TL2CAPSAPStateActiveLinkPending(CL2CAPSAPStateFactory& aFactory); |
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181 |
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182 // Events called from the SAP Signal Handler. |
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183 void LinkUp(CL2CAPConnectionSAP& aSAP) const; |
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184 }; |
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185 |
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186 NONSHARABLE_CLASS(TL2CAPSAPStateActiveSecMode4AccessRequestPending) : public TL2CAPSAPStateChannelPendingBase |
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187 { |
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188 public: |
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189 TL2CAPSAPStateActiveSecMode4AccessRequestPending(CL2CAPSAPStateFactory& aFactory); |
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190 |
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191 // Events called from the SAP. |
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192 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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193 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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194 |
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195 // Events called from the SAP Signal Handler. |
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196 void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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197 void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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198 |
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199 void AccessRequestComplete(CL2CAPConnectionSAP& aSignalHandler, TInt aResult) const; |
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200 }; |
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201 |
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202 NONSHARABLE_CLASS(TL2CAPSAPStateActiveChannelRequestPending) : public TL2CAPSAPStateChannelPendingBase |
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203 { |
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204 public: |
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205 TL2CAPSAPStateActiveChannelRequestPending(CL2CAPSAPStateFactory& aFactory); |
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206 |
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207 // Events called from the SAP Signal Handler. |
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208 void ChannelOpened(CL2CAPConnectionSAP& aSAP) const; |
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209 }; |
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210 |
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211 NONSHARABLE_CLASS(TL2CAPSAPStatePassiveAccessRequestPending) : public TL2CAPSAPStateChannelPendingBase |
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212 { |
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213 public: |
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214 TL2CAPSAPStatePassiveAccessRequestPending(CL2CAPSAPStateFactory& aFactory); |
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215 |
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216 // Events called from the SAP. |
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217 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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218 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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219 |
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220 // Events called from the SAP Signal Handler. |
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221 void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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222 void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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223 |
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224 // Events from the security manager. |
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225 void AccessRequestComplete(CL2CAPConnectionSAP& aSignalHandler, TInt aResult) const; |
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226 }; |
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227 |
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228 NONSHARABLE_CLASS(TL2CAPSAPStateActiveSecMode2AccessRequestPending) : public TL2CAPSAPStateChannelPendingBase |
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229 { |
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230 public: |
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231 TL2CAPSAPStateActiveSecMode2AccessRequestPending(CL2CAPSAPStateFactory& aFactory); |
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232 |
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233 // Events called from the SAP. |
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234 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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235 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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236 |
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237 // Events called from the SAP Signal Handler. |
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238 void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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239 void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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240 |
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241 // Events from the security manager. |
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242 void AccessRequestComplete(CL2CAPConnectionSAP& aSignalHandler, TInt aResult) const; |
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243 }; |
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244 |
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245 |
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246 NONSHARABLE_CLASS(TL2CAPSAPStatePendingOpen) : public TL2CAPSAPStateChannelPendingBase |
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247 { |
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248 public: |
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249 TL2CAPSAPStatePendingOpen(CL2CAPSAPStateFactory& aFactory); |
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250 |
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251 // Events called from the SAP Signal Handler. |
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252 void ChannelConfigured(CL2CAPConnectionSAP& aSAP, |
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253 CL2CapChannelConfig& aConfig, |
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254 CL2CAPMux& aMuxer, |
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255 TL2CAPPort aLocalPort, |
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256 TL2CAPPort aRemotePort); |
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257 |
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258 // Events called from the Data Controller. |
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259 void DataPlaneError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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260 |
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261 // State Transition Actions. |
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262 }; |
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263 |
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264 |
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265 NONSHARABLE_CLASS(TL2CAPSAPStateListening) : public TL2CAPSAPState |
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266 { |
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267 public: |
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268 TL2CAPSAPStateListening(CL2CAPSAPStateFactory& aFactory); |
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269 |
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270 // Events called from the SAP. |
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271 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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272 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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273 |
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274 // Events called from the SAP Signal Handler. |
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275 void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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276 |
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277 // Events called from the Data Controller. |
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278 |
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279 // State Transition Actions. |
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280 void Enter(CL2CAPConnectionSAP& aSAP) const; |
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281 void Exit(CL2CAPConnectionSAP& aSAP) const; |
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282 }; |
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283 |
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284 |
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285 NONSHARABLE_CLASS(TL2CAPSAPStateOpen) : public TL2CAPSAPState |
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286 { |
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287 public: |
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288 TL2CAPSAPStateOpen(CL2CAPSAPStateFactory& aFactory); |
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289 |
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290 // Events called from the SAP. |
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291 virtual TInt Send(CL2CAPConnectionSAP& aSAP, RMBufChain& aData, TUint aFlag) const; |
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292 virtual TInt Read(CL2CAPConnectionSAP& aSAP, RMBufChain& aData) const; |
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293 |
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294 virtual void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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295 virtual void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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296 |
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297 // Events called from the SAP Signal Handler. |
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298 virtual void ReconfiguringChannel(CL2CAPConnectionSAP& aSAP) const; |
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299 virtual void ChannelConfigured(CL2CAPConnectionSAP& aSAP, |
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300 CL2CapChannelConfig& aConfig, |
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301 CL2CAPMux& aMuxer, |
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302 TL2CAPPort aLocalPort, |
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303 TL2CAPPort aRemotePort); |
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304 virtual void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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305 virtual void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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306 virtual void CloseOutgoingSDUQueue(CL2CAPConnectionSAP& aSAP) const; |
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307 |
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308 // Events called from the Data Controller. |
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309 virtual void NewData(CL2CAPConnectionSAP& aSAP) const; |
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310 virtual TInt NewDataAsyncCallBack(CL2CAPConnectionSAP& aSAP) const; |
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311 virtual void CanSend(CL2CAPConnectionSAP& aSAP) const; |
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312 virtual void DataPlaneError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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313 |
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314 // State Transition Actions. |
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315 }; |
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316 |
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317 NONSHARABLE_CLASS(TL2CAPSAPStateAccepting) : public TL2CAPSAPStateOpen |
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318 { |
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319 public: |
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320 TL2CAPSAPStateAccepting(CL2CAPSAPStateFactory& aFactory); |
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321 |
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322 // Events called from the SAP. |
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323 void Start(CL2CAPConnectionSAP& aSAP) const; |
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324 void NewData(CL2CAPConnectionSAP& aSAP) const; |
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325 |
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326 // Events called from the SAP Signal Handler. |
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327 void ReconfiguringChannel(CL2CAPConnectionSAP& aSAP) const; |
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328 |
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329 // Events called from the Data Controller. |
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330 TInt NewDataAsyncCallBack(CL2CAPConnectionSAP& aSAP) const; |
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331 void CanSend(CL2CAPConnectionSAP& aSAP) const; |
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332 |
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333 // State Transition Actions. |
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334 void Exit(CL2CAPConnectionSAP& aSAP) const; |
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335 }; |
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336 |
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337 /** |
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338 This state exists to determine if the other side believes the link is opened. |
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339 It won't send us data until it has finished configuring the channel. On |
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340 reception of data the Signal Handler will be informed before moving the state |
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341 machine on to fully open. |
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342 */ |
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343 NONSHARABLE_CLASS(TL2CAPSAPStateAwaitingInitialData) : public TL2CAPSAPStateOpen |
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344 { |
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345 public: |
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346 TL2CAPSAPStateAwaitingInitialData(CL2CAPSAPStateFactory& aFactory); |
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347 |
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348 // Events called from the SAP Signal Handler. |
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349 void ReconfiguringChannel(CL2CAPConnectionSAP& aSAP) const; |
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350 |
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351 // Events called from the Data Controller. |
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352 void NewData(CL2CAPConnectionSAP& aSAP) const; |
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353 }; |
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354 |
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355 NONSHARABLE_CLASS(TL2CAPSAPStateDisconnecting) : public TL2CAPSAPState |
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356 { |
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357 public: |
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358 TL2CAPSAPStateDisconnecting(CL2CAPSAPStateFactory& aFactory); |
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359 |
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360 // Events called from the SAP. |
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361 void Start(CL2CAPConnectionSAP& aSAP) const; |
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362 TInt Send(CL2CAPConnectionSAP& aSAP, RMBufChain& aData, TUint aFlag) const; |
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363 TInt Read(CL2CAPConnectionSAP& aSAP, RMBufChain& aData) const; |
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364 |
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365 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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366 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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367 |
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368 |
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369 // Events called from the SAP Signal Handler. |
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370 void ChannelConfigured(CL2CAPConnectionSAP& aSAP, |
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371 CL2CapChannelConfig& aConfig, |
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372 CL2CAPMux& aMuxer, |
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373 TL2CAPPort aLocalPort, |
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374 TL2CAPPort aRemotePort); |
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375 |
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376 void ReconfiguringChannel(CL2CAPConnectionSAP& aSAP) const; |
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377 |
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378 void SignalHandlerError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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379 void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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380 void CloseOutgoingSDUQueue(CL2CAPConnectionSAP& aSAP) const; |
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381 |
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382 // Events called from the Data Controller. |
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383 void SDUQueueClosed(CL2CAPConnectionSAP& aSAP) const; |
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384 void NewData(CL2CAPConnectionSAP& aSAP) const; |
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385 TInt NewDataAsyncCallBack(CL2CAPConnectionSAP& aSAP) const; |
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386 void CanSend(CL2CAPConnectionSAP& aSAP) const; |
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387 void DataPlaneError(CL2CAPConnectionSAP& aSAP, TInt aErrorCode, MSocketNotify::TOperationBitmasks aErrorAction) const; |
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388 |
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389 // State Transition Actions. |
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390 }; |
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391 |
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392 |
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393 NONSHARABLE_CLASS(TL2CAPSAPStateError) : public TL2CAPSAPState |
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394 { |
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395 public: |
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396 TL2CAPSAPStateError(CL2CAPSAPStateFactory& aFactory); |
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397 |
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398 // Events called from the SAP. |
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399 void Start(CL2CAPConnectionSAP& aSAP) const; |
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400 |
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401 TInt Ioctl(CL2CAPConnectionSAP& aSAP, TUint aLevel, TUint aName, TDes8* aOption) const; |
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402 void CancelIoctl(CL2CAPConnectionSAP& aSAP, TUint aLevel, TUint aName) const; |
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403 void IoctlComplete(CL2CAPConnectionSAP& aSAP, TInt aErr, TUint aLevel, TUint aName, TDesC8* aBuf) const; |
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404 |
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405 void ActiveOpen(CL2CAPConnectionSAP& aSAP) const; |
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406 TInt PassiveOpen(CL2CAPConnectionSAP& aSAP, TUint aQueSize) const; |
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407 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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408 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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409 |
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410 TInt Send(CL2CAPConnectionSAP& aSAP, RMBufChain& aData, TUint aFlag) const; |
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411 TInt Read(CL2CAPConnectionSAP& aSAP, RMBufChain& aData) const; |
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412 |
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413 // Events called from the SAP Signal Handler. |
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414 void ChannelClosed(CL2CAPConnectionSAP& aSAP) const; |
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415 |
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416 // State Transition Actions. |
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417 void Enter(CL2CAPConnectionSAP& aSAP) const; |
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418 }; |
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419 |
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420 /** |
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421 The BOUND state. |
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422 |
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423 This is the state that freshly bound saps are in. This state should |
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424 only be reached once for each sap since ESOCK doesn't allow rebinding |
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425 or unbinding of saps. |
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426 |
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427 A sap can be bound from an ESOCK point of view but not be in this state. |
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428 Then the sap will either be on the listening path or Closed. |
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429 **/ |
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430 |
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431 NONSHARABLE_CLASS(TL2CAPSAPStateBound) : public TL2CAPSAPState |
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432 { |
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433 public: |
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434 TL2CAPSAPStateBound(CL2CAPSAPStateFactory& aFactory); |
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435 |
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436 // Events called from the SAP. |
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437 TInt PassiveOpen(CL2CAPConnectionSAP& aSAP, TUint aQueSize) const; |
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438 void Shutdown(CL2CAPConnectionSAP& aSAP) const; |
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439 void FastShutdown(CL2CAPConnectionSAP& aSAP) const; |
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440 |
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441 // State Transition Actions. |
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442 void Enter(CL2CAPConnectionSAP& aSAP) const; |
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443 void Exit(CL2CAPConnectionSAP& aSAP) const; |
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444 }; |
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445 |
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446 |
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447 NONSHARABLE_CLASS(CL2CAPSAPStateFactory) : public CBase |
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448 { |
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449 friend class CL2CAPProtocol; |
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450 public: |
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451 enum TStates |
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452 { |
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453 EClosed = 0, |
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454 EPassiveLinkPending, |
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455 EActiveLinkPending, |
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456 EPassiveAccessRequestPending, |
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457 EActiveSecMode2AccessRequestPending, |
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458 EPendingOpen, |
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459 EListening, |
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460 EAccepting, |
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461 EAwaitingInitialData, |
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462 EOpen, |
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463 EDisconnecting, |
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464 EError, |
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465 EBound, |
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466 EActiveSecMode4AccessRequestPending, |
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467 EActiveChannelRequestPending, |
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468 EMaxState, |
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469 }; |
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470 |
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471 TL2CAPSAPState& GetState(const TStates aState) const; |
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472 TInt StateIndex(const TL2CAPSAPState* aState) const; |
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473 |
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474 ~CL2CAPSAPStateFactory(); |
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475 |
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476 private: |
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477 static CL2CAPSAPStateFactory* NewL(); |
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478 CL2CAPSAPStateFactory(); |
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479 |
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480 TFixedArray<TL2CAPSAPState*, EMaxState> iStates; |
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481 }; |
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482 |
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483 |
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484 #endif |