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1 // Copyright (c) 2004-2009 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 // Implements the signalling state machine for an L2Cap Channel |
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17 #include <bluetooth/logger.h> |
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18 |
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19 #include "l2capSAPSignalHandler.h" |
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20 #include "l2capSigStates.h" |
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21 #include "l2capSigPacketConnection.h" |
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22 #include "l2capSigPacketConfigure.h" |
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23 #include "l2capSigPacketDisconnection.h" |
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24 #include "l2capSigPacketEcho.h" |
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25 #include "l2capSigPacketCommandReject.h" |
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26 |
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27 #include "l2capSigStates.h" |
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28 #include "l2signalmgr.h" |
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29 |
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30 #include "l2capSAPSignalHandler.h" |
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31 #include "l2cap.h" |
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32 #include "l2sap.h" |
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33 |
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34 #include "l2util.h" |
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35 |
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36 #ifdef __FLOG_ACTIVE |
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37 _LIT8(KLogComponent, LOG_COMPONENT_L2CAP); |
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38 #endif |
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39 |
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40 /*************************************************************************/ |
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41 // |
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42 // TL2CAPSigState Implementation |
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43 // |
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44 |
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45 TL2CAPSigState::TL2CAPSigState(const CL2CAPSignalStateFactory& aFactory): |
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46 iFactory(aFactory) |
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47 { |
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48 LOG_FUNC |
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49 } |
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50 |
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51 // Events from the SAP |
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52 void TL2CAPSigState::CloseChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
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53 { |
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54 LOG_FUNC |
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55 // This is a standard action for most states. |
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56 // Disconnect received from the SAP. Return to the |
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57 // closed state. |
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58 aSignalHandler.HandleLinkError(); |
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59 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EClosed)); |
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60 |
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61 // Signal back to the SAP that disconnection is complete. |
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62 aSignalHandler.SAP()->ChannelClosed(); |
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63 } |
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64 |
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65 void TL2CAPSigState::OpenChannelRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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66 { |
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67 LOG_FUNC |
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68 PanicInState(EL2CAPUnexpectedSAPEvent); |
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69 } |
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70 |
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71 void TL2CAPSigState::ConnectRequestReceived(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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72 { |
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73 LOG_FUNC |
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74 PanicInState(EL2CAPUnexpectedSAPEvent); |
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75 } |
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76 |
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77 void TL2CAPSigState::ConfigureChannelRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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78 { |
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79 LOG_FUNC |
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80 PanicInState(EL2CAPUnexpectedSAPEvent); |
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81 } |
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82 |
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83 // L2CAP commands received from the peer. |
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84 void TL2CAPSigState::ConnectResponse(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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85 HConnectionResponse* /*aConnectionResponse*/) const |
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86 { |
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87 LOG_FUNC |
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88 LOG1(_L("Unhandled Connect Response, state = 0x%08x"), this); |
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89 } |
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90 |
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91 |
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92 void TL2CAPSigState::ConfigRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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93 HConfigureRequest* /*aConfigRequest*/) const |
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94 { |
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95 LOG_FUNC |
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96 LOG1(_L("Unhandled Config Req, state = 0x%08x"), this); |
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97 } |
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98 |
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99 void TL2CAPSigState::ConfigResponse(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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100 HConfigureResponse* /*aConfigResponse*/) const |
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101 { |
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102 LOG_FUNC |
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103 LOG1(_L("Unhandled Config Response, state = 0x%08x"), this); |
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104 } |
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105 |
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106 void TL2CAPSigState::DisconnectRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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107 TUint8 /*aId*/) const |
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108 { |
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109 LOG_FUNC |
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110 LOG1(_L("Unhandled Disconnect Request, state = 0x%08x"), this); |
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111 } |
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112 |
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113 void TL2CAPSigState::DisconnectResponse(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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114 { |
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115 LOG_FUNC |
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116 LOG1(_L("Unhandled Disconnect Response, state = 0x%08x"), this); |
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117 } |
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118 |
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119 // Events from the Mux |
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120 void TL2CAPSigState::Error(CL2CapSAPSignalHandler& aSignalHandler, |
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121 TInt aErrorCode, |
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122 MSocketNotify::TOperationBitmasks aErrorAction) const |
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123 { |
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124 LOG_FUNC |
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125 // An error has occurred in the Mux or the signal handler. This means no |
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126 // more signalling can be done. Move to the closed state. Signal link down |
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127 // to clear any pending commands and stop waiting for outstanding responses. |
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128 // Inform the SAP of the error. |
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129 aSignalHandler.HandleLinkError(); |
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130 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EClosed)); |
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131 |
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132 // This will delete the signal handler if the SAP has detached. |
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133 aSignalHandler.SignalHandlerErrorD(aErrorCode, aErrorAction); |
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134 } |
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135 |
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136 TInt TL2CAPSigState::UpdateChannelConfig(CL2CapSAPSignalHandler& aSignalHandler, const TL2CapConfig& aAPIConfig) const |
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137 { |
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138 LOG_FUNC |
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139 // The default action is to update the values. Different actions are taken |
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140 // if configuration is in progress or the channel is open. |
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141 TBool reconfigRequired; // this only matters when the channel is already Open, can ignore it here |
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142 return aSignalHandler.ChannelConfig().UpdateConfigAPIChange(aAPIConfig, reconfigRequired); |
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143 } |
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144 |
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145 TInt TL2CAPSigState::GetNegotiatedChannelMode(const CL2CapSAPSignalHandler& /*aSignalHandler*/, TL2CapChannelMode& /*aMode*/) const |
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146 { |
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147 return KErrNotReady; |
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148 } |
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149 |
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150 // Change of state events |
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151 void TL2CAPSigState::Enter(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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152 { |
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153 LOG_FUNC |
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154 } |
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155 |
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156 void TL2CAPSigState::Exit(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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157 { |
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158 LOG_FUNC |
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159 } |
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160 |
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161 // Signal command queue event |
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162 void TL2CAPSigState::PendingCommandsDrained(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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163 { |
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164 LOG_FUNC |
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165 PanicInState(EL2CAPUnexpectedSAPSignalHandlerEvent); |
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166 } |
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167 |
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168 |
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169 // Timers |
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170 void TL2CAPSigState::ConfigurationTimerExpiry(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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171 { |
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172 LOG_FUNC |
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173 PanicInState(EL2CAPUnexpectedSAPSignalHandlerEvent); |
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174 } |
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175 |
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176 |
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177 // Helpers |
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178 TBool TL2CAPSigState::IsChannelClosed() const |
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179 { |
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180 LOG_FUNC |
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181 // Default is false. Only true in closed state. |
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182 return EFalse; |
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183 } |
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184 |
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185 TBool TL2CAPSigState::IsChannelOpen() const |
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186 { |
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187 // Only true in Open state. |
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188 return EFalse; |
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189 } |
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190 |
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191 void TL2CAPSigState::HandleDisconnectRequest(CL2CapSAPSignalHandler& aSignalHandler, TUint8 aId) const |
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192 { |
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193 LOG_FUNC |
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194 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitDisconnect)); |
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195 |
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196 TInt err = aSignalHandler.ConstructDisconnectResponse(aId); |
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197 if(err == KErrNone) |
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198 { |
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199 aSignalHandler.DrainPendingCommands(); |
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200 } |
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201 else |
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202 { |
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203 // Failed to send the response. Go directly into the closed state |
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204 // and inform the SAP that disconnection is complete. |
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205 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EClosed)); |
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206 aSignalHandler.HandleLinkError(); |
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207 aSignalHandler.SAP()->ChannelClosed(); |
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208 } |
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209 } |
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210 |
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211 void TL2CAPSigState::HandleSAPDisconnect(CL2CapSAPSignalHandler& aSignalHandler) const |
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212 { |
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213 LOG_FUNC |
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214 TInt err = KErrDisconnected; |
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215 |
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216 if(aSignalHandler.RemotePort() != 0) |
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217 { |
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218 // We have a remote CID from a response with result pending, issue a disconnect request |
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219 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitDisconnect)); |
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220 err = aSignalHandler.ConstructDisconnectRequest(); |
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221 } |
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222 |
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223 if(err != KErrNone) |
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224 { |
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225 // Failed to send the request or do not have a connection (without a valid CID). |
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226 // Go directly into the closed state and inform the SAP that disconnection is complete. |
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227 aSignalHandler.HandleLinkError(); |
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228 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EClosed)); |
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229 aSignalHandler.SAP()->ChannelClosed(); |
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230 } |
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231 } |
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232 |
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233 TInt TL2CAPSigState::SendConfigRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
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234 { |
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235 LOG_FUNC |
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236 return aSignalHandler.ConstructConfigRequest(); |
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237 } |
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238 |
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239 TInt TL2CAPSigState::SendConfigResponse(CL2CapSAPSignalHandler& aSignalHandler, TConfigResponseResult aResult) const |
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240 { |
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241 LOG_FUNC |
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242 return aSignalHandler.ConstructConfigResponse(aSignalHandler.GetOutstandingRequestID(), |
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243 HConfigureResponse::KNoConfigurationFlags, |
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244 aResult); |
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245 } |
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246 |
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247 void TL2CAPSigState::DisconnectWithError(CL2CapSAPSignalHandler& aSignalHandler, TInt aError) const |
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248 { |
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249 aSignalHandler.SetSignalHandlerErrorCode(aError); |
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250 aSignalHandler.SetSignalHandlerErrorAction(MSocketNotify::EErrorAllOperations); |
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251 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitDisconnect)); |
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252 TInt err = aSignalHandler.ConstructDisconnectRequest(); |
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253 if(err != KErrNone) |
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254 { |
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255 // Failed to send the request. Call the Error method, this |
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256 // will move the state to closed and forward the error to |
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257 // the SAP. |
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258 Error(aSignalHandler, aError, MSocketNotify::EErrorAllOperations); |
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259 } |
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260 } |
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261 |
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262 |
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263 /** |
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264 Calls the appropriate panic function to encode the panic |
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265 code with the current state identifier. |
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266 @param aPanic The panic code that the state is panicking with. |
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267 */ |
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268 void TL2CAPSigState::PanicInState(TL2CAPPanic aPanic) const |
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269 { |
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270 LOG_FUNC |
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271 Panic(aPanic, iFactory.StateIndex(this)); |
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272 } |
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273 |
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274 /*************************************************************************/ |
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275 // Implementation of TL2CAPStateClosed |
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276 // |
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277 // Starting state and state re-entered when L2Cap logical link has been disconnected. |
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278 // |
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279 TL2CAPSigStateClosed::TL2CAPSigStateClosed(const CL2CAPSignalStateFactory& aFactory) |
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280 : TL2CAPSigState(aFactory) |
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281 { |
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282 LOG_FUNC |
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283 } |
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284 |
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285 void TL2CAPSigStateClosed::OpenChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
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286 { |
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287 LOG_FUNC |
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288 // The SAP has requested a channel be opened. |
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289 |
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290 TInt err = aSignalHandler.ChannelConfig().UpdateLocalConfigWithEntityCapabilities(); |
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291 if (err == KErrNone) |
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292 { |
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293 // Get a free source CID for this channel to use. |
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294 TL2CAPPort port; |
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295 err = aSignalHandler.Mux().GetFreeCID(port); |
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296 if(err == KErrNone) |
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297 { |
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298 // Update local Port. |
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299 aSignalHandler.SetLocalPort(port); |
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300 |
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301 // Override park to allow the connection to be made. |
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302 aSignalHandler.OverrideParkMode(); |
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303 |
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304 // Active connection. Send a Connect Request command. |
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305 err = aSignalHandler.ConstructConnectionRequest(); |
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306 if(err == KErrNone) |
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307 { |
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308 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConnectRsp)); |
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309 } |
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310 } |
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311 } |
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312 |
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313 if (err != KErrNone) |
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314 { |
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315 // The L2CAP connection could not be initiated. Error the SAP. |
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316 Error(aSignalHandler, err, MSocketNotify::EErrorConnect); |
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317 } |
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318 } |
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319 |
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320 void TL2CAPSigStateClosed::ConnectRequestReceived(CL2CapSAPSignalHandler& aSignalHandler) const |
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321 { |
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322 LOG_FUNC |
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323 TInt err = KErrNone; |
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324 // An ACL has been established. |
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325 // Get a free source CID for this channel to use. |
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326 TL2CAPPort port; |
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327 err = aSignalHandler.Mux().GetFreeCID(port); |
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328 if(err == KErrNone) |
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329 { |
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330 // Update local Port. |
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331 aSignalHandler.SetLocalPort(port); |
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332 |
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333 // Override park to allow the connection to be made. |
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334 aSignalHandler.OverrideParkMode(); |
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335 // Override all LPMs (if timeout not set to zero) |
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336 aSignalHandler.OverrideLPMWithTimeout(); |
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337 |
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338 // Send a response with a 'pending' result and start security procedure. |
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339 err = aSignalHandler.ConstructConnectionResponse(aSignalHandler.GetOutstandingRequestID(), |
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340 EConnectPending, |
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341 EConnectPendAuthorization); |
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342 } |
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343 |
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344 if(err == KErrNone) |
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345 { |
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346 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConnect)); |
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347 } |
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348 else |
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349 { |
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350 // The L2CAP connection could not be initiated. Error the SAP. |
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351 Error(aSignalHandler, err, MSocketNotify::EErrorConnect); |
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352 } |
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353 } |
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354 |
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355 |
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356 void TL2CAPSigStateClosed::CloseChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
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357 { |
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358 LOG_FUNC |
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359 // Detach from the Mux. Inform the SAP that disconnection is complete. |
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360 aSignalHandler.DetachFromMux(); |
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361 aSignalHandler.SAP()->ChannelClosed(); |
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362 } |
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363 |
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364 void TL2CAPSigStateClosed::ConfigRequest(CL2CapSAPSignalHandler& aSignalHandler, |
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365 HConfigureRequest* aConfigRequest) const |
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366 { |
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367 LOG_FUNC |
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368 aSignalHandler.SendInvalidCIDCommandReject(aConfigRequest->ID(), |
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369 0, |
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370 aConfigRequest->DestinationCID()); |
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371 } |
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372 |
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373 TBool TL2CAPSigStateClosed::IsChannelClosed() const |
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374 { |
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375 LOG_FUNC |
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376 return ETrue; |
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377 } |
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378 |
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379 void TL2CAPSigStateClosed::Enter(CL2CapSAPSignalHandler& aSignalHandler) const |
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380 { |
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381 LOG_FUNC |
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382 // Cancel the configuration timer. |
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383 aSignalHandler.CancelTimer(); |
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384 |
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385 // If Park mode has been overridden during either channel establishment or |
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386 // channel disconnect, remove the override. |
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387 // NB It is safe to call this method multiple times. |
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388 aSignalHandler.UndoOverrideParkMode(); |
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389 |
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390 // If the signal handler has left the closed state, it will have been added |
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391 // to the SH list in the Muxer. Now that the closed state is being |
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392 // re-entered, remove the handler from the Muxer queue. |
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393 // NB It is safe to call this method multiple times. |
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394 aSignalHandler.DetachFromMux(); |
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395 } |
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396 |
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397 |
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398 /************************************************************/ |
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399 // Implementation of void TL2CAPSigStateWaitConnectRsp |
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400 // |
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401 // This represents an Active SAP that is waiting for a connection response |
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402 TL2CAPSigStateWaitConnectRsp::TL2CAPSigStateWaitConnectRsp(const CL2CAPSignalStateFactory& aFactory) |
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403 : TL2CAPSigState(aFactory) |
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404 { |
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405 LOG_FUNC |
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406 } |
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407 |
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408 // L2CAP commands received from the peer. |
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409 void TL2CAPSigStateWaitConnectRsp::ConnectResponse(CL2CapSAPSignalHandler& aSignalHandler, |
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410 HConnectionResponse* aConnectionResponse) const |
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411 |
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412 { |
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413 LOG_FUNC |
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414 switch(aConnectionResponse->Result()) |
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415 { |
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416 case EConnectSuccess: |
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417 aSignalHandler.SetRemotePort(aConnectionResponse->DestinationCID()); |
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418 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConfig)); |
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419 aSignalHandler.SAP()->ChannelOpened(); |
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420 break; |
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421 |
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422 case EConnectPending: |
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423 aSignalHandler.SetRemotePort(aConnectionResponse->DestinationCID()); |
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424 break; // No other action here - the ERTx timer has been started. |
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425 |
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426 default: |
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427 // One of the failed, non-pending results |
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428 |
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429 // The connect has failed |
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430 // We're re-connectable, so go back to orig state |
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431 // NB Error now clears muxer and sets state to closed |
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432 Error(aSignalHandler, ((aConnectionResponse->Result() == EConnectSecurityBlock) ? KErrL2CAPAccessRequestDenied : KErrCouldNotConnect), MSocketNotify::EErrorConnect); |
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433 break; |
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434 }; |
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435 } |
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436 |
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437 void TL2CAPSigStateWaitConnectRsp::ConfigRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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438 HConfigureRequest* /*aConfigRequest*/) const |
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439 { |
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440 LOG_FUNC |
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441 // Override the default panicing action for this state as we may validly be |
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442 // here. This could happen if the remote has sent a connect response, followed |
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443 // by this config request but we have not successfully processed the connect |
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444 // response. This can happen when the response arrives after the rtx has |
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445 // expired but we haven't yet resent the connect request. |
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446 } |
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447 |
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448 // Events from the Mux |
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449 void TL2CAPSigStateWaitConnectRsp::CloseChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
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450 { |
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451 // Disconnect the channel. |
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452 HandleSAPDisconnect(aSignalHandler); |
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453 } |
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454 |
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455 void TL2CAPSigStateWaitConnectRsp::Enter(CL2CapSAPSignalHandler& aSignalHandler) const |
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456 { |
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457 LOG_FUNC |
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458 //set the remote CID to 0 |
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459 aSignalHandler.SetRemotePort(TL2CAPPort(0)); |
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460 } |
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461 |
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462 /****************************************************************************/ |
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463 // |
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464 // Waiting for the SAP to indicate that the connection can be established. |
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465 TL2CAPSigStateWaitConnect::TL2CAPSigStateWaitConnect(const CL2CAPSignalStateFactory& aFactory) |
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466 : TL2CAPSigState(aFactory) |
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467 { |
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468 LOG_FUNC |
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469 } |
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470 |
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471 // Events from the SAP |
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472 void TL2CAPSigStateWaitConnect::OpenChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
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473 { |
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474 LOG_FUNC |
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475 |
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476 TInt updateConfigErr = aSignalHandler.ChannelConfig().UpdateLocalConfigWithEntityCapabilities(); |
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477 TInt sendErr = KErrNone; |
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478 if (updateConfigErr == KErrNone) |
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479 { |
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480 // The connection has been allowed. Send the connection response. |
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481 sendErr = aSignalHandler.ConstructConnectionResponse(aSignalHandler.GetOutstandingRequestID(), |
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482 EConnectSuccess, |
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483 EConnectPendNoFurtherInfo); |
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484 if (sendErr == KErrNone) |
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485 { |
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486 // Enter the initial config state and initiate local configuration. |
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487 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConfig)); |
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488 if(!aSignalHandler.DelayConfigRequest()) |
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489 // We should never get in here! The timer, which allows the delay |
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490 // should have been started on entry to the state "WaitConfig". |
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491 { |
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492 aSignalHandler.ConfigureChannelRequest(); |
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493 } |
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494 } |
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495 } // Success Response |
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496 else |
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497 { |
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498 // We don't have a generic 'Just no' response code, 'No resources' comes closest. |
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499 sendErr = aSignalHandler.ConstructConnectionResponse(aSignalHandler.GetOutstandingRequestID(), |
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500 EConnectNoResources, |
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501 EConnectPendNoFurtherInfo); |
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502 if (sendErr == KErrNone) |
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503 { |
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504 // When the response is sent, PendingCommandsDrained() will call Error(). |
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505 aSignalHandler.SetSignalHandlerErrorCode(updateConfigErr); |
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506 aSignalHandler.SetSignalHandlerErrorAction(MSocketNotify::EErrorConnect); |
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507 aSignalHandler.DrainPendingCommands(); |
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508 } |
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509 } // Failure response |
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510 |
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511 if (sendErr != KErrNone) |
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512 { |
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513 // The L2CAP connection could not be initiated. Error the SAP. |
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514 Error(aSignalHandler, sendErr, MSocketNotify::EErrorConnect); |
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515 } |
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516 } |
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517 |
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518 // Events from the Mux |
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519 void TL2CAPSigStateWaitConnect::CloseChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
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520 { |
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521 LOG_FUNC |
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522 |
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523 // Tell the peer that there has been a security error |
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524 TInt err = aSignalHandler.ConstructConnectionResponse(aSignalHandler.GetOutstandingRequestID(), |
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525 EConnectSecurityBlock, |
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526 EConnectPendNoFurtherInfo); |
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527 |
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528 if(err == KErrNone) |
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529 { |
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530 aSignalHandler.DrainPendingCommands(); |
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531 } |
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532 else |
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533 { |
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534 // Failed to send the response. Go directly into the closed state |
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535 // and inform the SAP that disconnection is complete. |
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536 |
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537 // HandleLinkError flushes all the signal handler queues. This should be done |
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538 // before making the transition to the EClosed state because the signal handler |
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539 // will be detached from the mux it is bound to, at which point we expect there |
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540 // to be no commands queued (as we will no longer be able to deal with them). |
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541 aSignalHandler.HandleLinkError(); |
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542 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EClosed)); |
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543 aSignalHandler.SAP()->ChannelClosed(); |
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544 } |
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545 } |
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546 |
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547 void TL2CAPSigStateWaitConnect::PendingCommandsDrained(CL2CapSAPSignalHandler& aSignalHandler) const |
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548 { |
|
549 LOG_FUNC |
|
550 if(aSignalHandler.SignalHandlerErrorCode() != KErrNone) |
|
551 { |
|
552 Error(aSignalHandler, aSignalHandler.SignalHandlerErrorCode(), aSignalHandler.SignalHandlerErrorAction()); |
|
553 } |
|
554 else |
|
555 { |
|
556 // This will delete the signal handler if the SAP has detached. |
|
557 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EClosed)); |
|
558 aSignalHandler.SignalHandlerDisconnectedCanClose(); |
|
559 } |
|
560 } |
|
561 |
|
562 // L2CAP commands received from the peer. |
|
563 void TL2CAPSigStateWaitConnect::DisconnectRequest(CL2CapSAPSignalHandler& aSignalHandler, TUint8 aId) const |
|
564 { |
|
565 LOG_FUNC |
|
566 // Call a common helper function to handle the Disconnect Request. |
|
567 HandleDisconnectRequest(aSignalHandler, aId); |
|
568 } |
|
569 |
|
570 |
|
571 /**************************************************************************/ |
|
572 // Implementation of TL2CAPSigStateConfigBase |
|
573 // |
|
574 // This represents a SAP that is currently undergoing |
|
575 // configuration on the link whether it be initial or reconfiguration |
|
576 // This is the base class and will never itself be instantiated. |
|
577 |
|
578 TL2CAPSigStateConfigBase::TL2CAPSigStateConfigBase(const CL2CAPSignalStateFactory& aFactory) |
|
579 : TL2CAPSigState(aFactory) |
|
580 { |
|
581 LOG_FUNC |
|
582 } |
|
583 |
|
584 // L2CAP commands received from the peer. |
|
585 void TL2CAPSigStateConfigBase::DisconnectRequest(CL2CapSAPSignalHandler& aSignalHandler, TUint8 aId) const |
|
586 { |
|
587 LOG_FUNC |
|
588 // FIRST - Flush all three signalling queues |
|
589 aSignalHandler.HandleLinkError(); |
|
590 |
|
591 // Call a common helper function to handle the Disconnect Request. |
|
592 // NB This will add a new command to the pending command list. |
|
593 HandleDisconnectRequest(aSignalHandler, aId); |
|
594 } |
|
595 |
|
596 void TL2CAPSigStateConfigBase::Error(CL2CapSAPSignalHandler& aSignalHandler, |
|
597 TInt aErrorCode, |
|
598 MSocketNotify::TOperationBitmasks aErrorAction) const |
|
599 { |
|
600 LOG_FUNC |
|
601 // Cancel the configuration timer. |
|
602 aSignalHandler.CancelTimer(); |
|
603 |
|
604 // Call the base class error method. |
|
605 TL2CAPSigState::Error(aSignalHandler, aErrorCode, aErrorAction); |
|
606 } |
|
607 |
|
608 // Events from the SAP |
|
609 void TL2CAPSigStateConfigBase::CloseChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
|
610 { |
|
611 LOG_FUNC |
|
612 // Disconnect the channel. |
|
613 HandleSAPDisconnect(aSignalHandler); |
|
614 } |
|
615 |
|
616 TInt TL2CAPSigStateConfigBase::UpdateChannelConfig(CL2CapSAPSignalHandler& /*aSignalHandler*/, const TL2CapConfig& /*aAPIConfig*/) const |
|
617 { |
|
618 LOG_FUNC |
|
619 // Configuration is in progress. |
|
620 return KErrL2CAPConfigAlreadyInProgress; |
|
621 } |
|
622 |
|
623 // Timer Events |
|
624 void TL2CAPSigStateConfigBase::ConfigurationTimerExpiry(CL2CapSAPSignalHandler& aSignalHandler) const |
|
625 { |
|
626 LOG_FUNC |
|
627 CloseChannelRequest(aSignalHandler); |
|
628 } |
|
629 |
|
630 // Common handling of Config Request and Response commands. |
|
631 void TL2CAPSigStateConfigBase::ConfigRequest(CL2CapSAPSignalHandler& aSignalHandler, |
|
632 HConfigureRequest* aConfigRequest, |
|
633 CL2CAPSignalStateFactory::TSigStates aConfigSuccessState) const |
|
634 { |
|
635 LOG_FUNC |
|
636 RMBufChain unknownOptions; |
|
637 // Following the state machine, we know that OUR config request |
|
638 // has not yet been sent (or even queued) if the next state |
|
639 // (on success) is EWaitSendConfig |
|
640 TBool configRequestSent = aConfigSuccessState != CL2CAPSignalStateFactory::EWaitSendConfig; |
|
641 |
|
642 TInt err = aSignalHandler.ChannelConfig().HandleConfigRequest(*aConfigRequest, unknownOptions); |
|
643 if(err == KErrNone) |
|
644 { |
|
645 // Check if the Config Request has been segmented using the continuation flag. |
|
646 if(!(aConfigRequest->Flags() & KConfigOptionContinuationMask)) |
|
647 { |
|
648 TConfigResponseResult result; |
|
649 err = aSignalHandler.ChannelConfig().ConfigRequestComplete(configRequestSent, result); |
|
650 if (err == KErrConfigRejected) |
|
651 { |
|
652 // 'State 2' negotiation channel mode conflict - disconnect when a request |
|
653 // for anything other than our preferred channel mode is received. |
|
654 // Don't send a Config Response, send a Disconnect Request immediately. |
|
655 DisconnectWithError(aSignalHandler, err); |
|
656 } |
|
657 else |
|
658 { |
|
659 if (err == KErrNone) |
|
660 { |
|
661 aSignalHandler.SetOutstandingRequestID(aConfigRequest->ID()); |
|
662 // Send the config response. |
|
663 err = SendConfigResponse(aSignalHandler, result); |
|
664 if(err == KErrNone) |
|
665 { |
|
666 // Check if the peer config was acceptable. |
|
667 switch(result) |
|
668 { |
|
669 case EConfigSuccess: |
|
670 // Move to next state. |
|
671 aSignalHandler.SetState(iFactory.GetState(aConfigSuccessState)); |
|
672 break; |
|
673 |
|
674 case EConfigUnacceptableParams: |
|
675 case EConfigRejected: |
|
676 // Stay in current state. |
|
677 break; |
|
678 |
|
679 case EConfigUnknownOption: // impossible on this path |
|
680 default: |
|
681 __ASSERT_DEBUG(EFalse, PanicInState(EL2CAPInvalidConfigResponseCodeGenerated)); |
|
682 break; |
|
683 } |
|
684 } // err == KErrNone |
|
685 } // err == KErrNone |
|
686 if (err) |
|
687 { |
|
688 // The L2CAP connection could not be initiated. Error the SAP. |
|
689 Error(aSignalHandler, err, MSocketNotify::EErrorAllOperations); |
|
690 } |
|
691 } // err != KErrConfigRejected |
|
692 } // continuation bit not set |
|
693 else |
|
694 { |
|
695 // The config request has been segmented. Send an empty Config Response |
|
696 // message and wait for the final config request containing a C-Flag set to zero. |
|
697 err = aSignalHandler.ConstructConfigResponse(aConfigRequest->ID(), |
|
698 KConfigOptionContinuationMask, |
|
699 EConfigSuccess); |
|
700 if(err != KErrNone) |
|
701 { |
|
702 // The L2CAP connection could not be initiated. Error the SAP. |
|
703 Error(aSignalHandler, err, MSocketNotify::EErrorAllOperations); |
|
704 } |
|
705 } |
|
706 } // no error when parsing request command |
|
707 else |
|
708 { |
|
709 TBool segmentedRequest = aConfigRequest->Flags() & KConfigOptionContinuationMask; |
|
710 TConfigFlags responseFlags = segmentedRequest ? KConfigOptionContinuationMask : |
|
711 HConfigureResponse::KNoConfigurationFlags; |
|
712 |
|
713 // Switch on the reason for the incoming request parsing failure. |
|
714 switch(err) |
|
715 { |
|
716 case KErrBadPacketReceived: |
|
717 // The options could not be decoded. Send a response |
|
718 // indicating that the config has been rejected. Wait for |
|
719 // the peer to take action. |
|
720 err = aSignalHandler.ConstructConfigResponse(aConfigRequest->ID(), |
|
721 responseFlags, |
|
722 EConfigRejected); |
|
723 |
|
724 if(err != KErrNone) |
|
725 { |
|
726 Error(aSignalHandler, KErrCouldNotConnect, MSocketNotify::EErrorConnect); |
|
727 } |
|
728 break; |
|
729 |
|
730 case KErrConfigUnknownOptions: |
|
731 err = aSignalHandler.ConstructConfigResponse(aConfigRequest->ID(), |
|
732 responseFlags, |
|
733 EConfigUnknownOption, |
|
734 unknownOptions); |
|
735 if(err != KErrNone) |
|
736 { |
|
737 Error(aSignalHandler, KErrCouldNotConnect, MSocketNotify::EErrorConnect); |
|
738 } |
|
739 break; |
|
740 |
|
741 default: |
|
742 // The L2CAP connection could not be initiated. Error the SAP. |
|
743 Error(aSignalHandler, err, MSocketNotify::EErrorConnect); |
|
744 break; |
|
745 } |
|
746 } // parsing not successful |
|
747 // Free the unknown options buffer. |
|
748 unknownOptions.Free(); |
|
749 } |
|
750 |
|
751 void TL2CAPSigStateConfigBase::ConfigResponse(CL2CapSAPSignalHandler& aSignalHandler, |
|
752 HConfigureResponse* aConfigResponse, |
|
753 CL2CAPSignalStateFactory::TSigStates aConfigSuccessState) const |
|
754 { |
|
755 LOG_FUNC |
|
756 RMBufChain unknownOptions; |
|
757 TInt err = aSignalHandler.ChannelConfig().HandleConfigResponse(*aConfigResponse, unknownOptions); |
|
758 |
|
759 if(err == KErrNone) |
|
760 { |
|
761 // Check if the Config Response has been segmented using the continuation flag. |
|
762 if(!(aConfigResponse->Flags() & KConfigOptionContinuationMask)) |
|
763 { |
|
764 // Check if the peer has accepted our config. |
|
765 CL2CapChannelConfig::TChannelConfigStatus status = aSignalHandler.ChannelConfig().LocalConfigurationStatus(); |
|
766 |
|
767 // Modify the status according to the result in the response received. |
|
768 if(aConfigResponse->Results() == EConfigUnacceptableParams) |
|
769 { |
|
770 // If the result was unacceptable parameters always reconfigure. |
|
771 if(status == CL2CapChannelConfig::EChannelConfigComplete) |
|
772 { |
|
773 status = CL2CapChannelConfig::EChannelConfigOutstanding; |
|
774 } |
|
775 } |
|
776 else |
|
777 { |
|
778 if(aConfigResponse->Results() != EConfigSuccess) |
|
779 { |
|
780 // Either the peer has rejected the last request or some of the |
|
781 // parameters contained in the last request are not recognised. |
|
782 // Ensure the channel is disconnected. |
|
783 status = CL2CapChannelConfig::EChannelConfigFailed; |
|
784 } |
|
785 } |
|
786 |
|
787 switch(status) |
|
788 { |
|
789 case CL2CapChannelConfig::EChannelConfigComplete: |
|
790 // Configuration complete. Switch to the next state. |
|
791 aSignalHandler.SetState(iFactory.GetState(aConfigSuccessState)); |
|
792 break; |
|
793 |
|
794 case CL2CapChannelConfig::EChannelConfigOutstanding: |
|
795 // Local config should be restarted. |
|
796 // Send another Config Request and stay in this state. |
|
797 err = SendConfigRequest(aSignalHandler); |
|
798 if(err != KErrNone) |
|
799 { |
|
800 Error(aSignalHandler, KErrCouldNotConnect, MSocketNotify::EErrorAllOperations); |
|
801 } |
|
802 break; |
|
803 |
|
804 case CL2CapChannelConfig::EChannelConfigFailed: |
|
805 // Configuration has failed. |
|
806 // Store the error code and disconnect the channel. |
|
807 DisconnectWithError(aSignalHandler, KErrConfigRejected); |
|
808 break; |
|
809 |
|
810 default: |
|
811 __ASSERT_DEBUG(EFalse, PanicInState(EL2CAPInvalidPeerConfigCodeGenerated)); |
|
812 break; |
|
813 }; |
|
814 } |
|
815 // else - the config response has been segmented - wait for the final config |
|
816 // response containing a C-Flag set to zero. |
|
817 } |
|
818 else |
|
819 { |
|
820 Error(aSignalHandler, KErrCouldNotConnect, MSocketNotify::EErrorAllOperations); |
|
821 } |
|
822 // Free the unknown options buffer. |
|
823 unknownOptions.Free(); |
|
824 } |
|
825 |
|
826 /**************************************************************************/ |
|
827 // Implementation of TL2CAPSigStateWaitConfig |
|
828 // |
|
829 // No config requests/responses sent or received. |
|
830 // Waiting to receive peer L2Cap supported features. |
|
831 // |
|
832 TL2CAPSigStateWaitConfig::TL2CAPSigStateWaitConfig(const CL2CAPSignalStateFactory& aFactory) |
|
833 : TL2CAPSigStateConfigBase(aFactory) |
|
834 { |
|
835 LOG_FUNC |
|
836 } |
|
837 |
|
838 // Events from the SAP |
|
839 void TL2CAPSigStateWaitConfig::ConfigureChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
|
840 { |
|
841 LOG_FUNC |
|
842 // Local config can now be initiated. The local config requirements must |
|
843 // take into account the peer entity capabilities. |
|
844 __ASSERT_DEBUG(aSignalHandler.ChannelConfig().IsPeerInfoDefined(), |
|
845 Panic(EL2CAPFecConfigAttemptWithoutPeerInfo)); |
|
846 |
|
847 if(!aSignalHandler.DelayConfigRequest()) |
|
848 { |
|
849 // Send our config request. |
|
850 TInt err = SendConfigRequest(aSignalHandler); |
|
851 if(err == KErrNone) |
|
852 { |
|
853 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConfigReqRsp)); |
|
854 } |
|
855 else |
|
856 { |
|
857 Error(aSignalHandler, KErrCouldNotConnect, MSocketNotify::EErrorAllOperations); |
|
858 } |
|
859 } |
|
860 // Else wait until the delay timer expires. |
|
861 } |
|
862 |
|
863 // L2CAP commands received from the peer. |
|
864 void TL2CAPSigStateWaitConfig::ConfigRequest(CL2CapSAPSignalHandler& aSignalHandler, |
|
865 HConfigureRequest* aConfigRequest) const |
|
866 { |
|
867 LOG_FUNC |
|
868 // Call the config base class helper method to process this command. |
|
869 TL2CAPSigStateConfigBase::ConfigRequest(aSignalHandler, aConfigRequest, CL2CAPSignalStateFactory::EWaitSendConfig); |
|
870 } |
|
871 |
|
872 // Change of state events |
|
873 void TL2CAPSigStateWaitConfig::Enter(CL2CapSAPSignalHandler& aSignalHandler) const |
|
874 { |
|
875 LOG_FUNC |
|
876 aSignalHandler.StartConfigurationTimer(); |
|
877 } |
|
878 |
|
879 /**************************************************************************/ |
|
880 // Implementation of EWaitSendConfig |
|
881 // |
|
882 // Remote's config request received and responded to with 'success'. |
|
883 // Waiting to send outgoing config request... |
|
884 // ...waiting to receive peer L2Cap supported features. |
|
885 // |
|
886 TL2CAPSigStateWaitSendConfig::TL2CAPSigStateWaitSendConfig(const CL2CAPSignalStateFactory& aFactory) |
|
887 : TL2CAPSigStateConfigBase(aFactory) |
|
888 { |
|
889 LOG_FUNC |
|
890 } |
|
891 |
|
892 // Events from the SAP |
|
893 void TL2CAPSigStateWaitSendConfig::ConfigureChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
|
894 { |
|
895 LOG_FUNC |
|
896 // Local config can now be initiated. The local config requirements must |
|
897 // take into account the peer entity capabilities. |
|
898 __ASSERT_DEBUG(aSignalHandler.ChannelConfig().IsPeerInfoDefined(), |
|
899 Panic(EL2CAPFecConfigAttemptWithoutPeerInfo)); |
|
900 |
|
901 // Send our config request. |
|
902 TInt err = SendConfigRequest(aSignalHandler); |
|
903 if(err == KErrNone) |
|
904 { |
|
905 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConfigRsp)); |
|
906 } |
|
907 else |
|
908 { |
|
909 Error(aSignalHandler, KErrCouldNotConnect, MSocketNotify::EErrorAllOperations); |
|
910 } |
|
911 } |
|
912 |
|
913 /**************************************************************************/ |
|
914 // Implementation of TL2CAPSigStateWaitConfigReqRsp |
|
915 // |
|
916 // Outgoing config request sent. |
|
917 // Waiting for remote's config request, and remote's config response. |
|
918 // |
|
919 TL2CAPSigStateWaitConfigReqRsp::TL2CAPSigStateWaitConfigReqRsp(const CL2CAPSignalStateFactory& aFactory) |
|
920 : TL2CAPSigStateConfigBase(aFactory) |
|
921 { |
|
922 LOG_FUNC |
|
923 } |
|
924 |
|
925 // L2CAP commands received from the peer. |
|
926 void TL2CAPSigStateWaitConfigReqRsp::ConfigRequest(CL2CapSAPSignalHandler& aSignalHandler, |
|
927 HConfigureRequest* aConfigRequest) const |
|
928 { |
|
929 LOG_FUNC |
|
930 // Call the config base class helper method to process this command. |
|
931 TL2CAPSigStateConfigBase::ConfigRequest(aSignalHandler, aConfigRequest, CL2CAPSignalStateFactory::EWaitConfigRsp); |
|
932 } |
|
933 |
|
934 void TL2CAPSigStateWaitConfigReqRsp::ConfigResponse(CL2CapSAPSignalHandler& aSignalHandler, |
|
935 HConfigureResponse* aConfigResponse) const |
|
936 { |
|
937 LOG_FUNC |
|
938 // Call the config base class helper method to process this command. |
|
939 TL2CAPSigStateConfigBase::ConfigResponse(aSignalHandler, aConfigResponse, CL2CAPSignalStateFactory::EWaitConfigReq); |
|
940 } |
|
941 |
|
942 /**************************************************************************/ |
|
943 // Implementation of EWaitConfigRsp |
|
944 // |
|
945 // Remote's config request received and responded to with 'success'. |
|
946 // Outgoing config request sent. |
|
947 // Waiting for remote's config response. |
|
948 // |
|
949 TL2CAPSigStateWaitConfigRsp::TL2CAPSigStateWaitConfigRsp(const CL2CAPSignalStateFactory& aFactory) |
|
950 : TL2CAPSigStateConfigBase(aFactory) |
|
951 { |
|
952 LOG_FUNC |
|
953 } |
|
954 |
|
955 void TL2CAPSigStateWaitConfigRsp::ConfigResponse(CL2CapSAPSignalHandler& aSignalHandler, |
|
956 HConfigureResponse* aConfigResponse) const |
|
957 { |
|
958 LOG_FUNC |
|
959 // Call the config base class helper method to process this command. |
|
960 TL2CAPSigStateConfigBase::ConfigResponse(aSignalHandler, aConfigResponse, CL2CAPSignalStateFactory::EOpen); |
|
961 } |
|
962 |
|
963 /**************************************************************************/ |
|
964 // Implementation of EWaitConfigReq |
|
965 // |
|
966 // Outgoing config request sent, and responded to with 'success'. |
|
967 // Waiting for remote's config request. |
|
968 // |
|
969 TL2CAPSigStateWaitConfigReq::TL2CAPSigStateWaitConfigReq(const CL2CAPSignalStateFactory& aFactory) |
|
970 : TL2CAPSigStateConfigBase(aFactory) |
|
971 { |
|
972 LOG_FUNC |
|
973 } |
|
974 |
|
975 // L2CAP commands received from the peer. |
|
976 void TL2CAPSigStateWaitConfigReq::ConfigRequest(CL2CapSAPSignalHandler& aSignalHandler, |
|
977 HConfigureRequest* aConfigRequest) const |
|
978 { |
|
979 LOG_FUNC |
|
980 // Call the config base class helper method to process this command. |
|
981 TL2CAPSigStateConfigBase::ConfigRequest(aSignalHandler, aConfigRequest, CL2CAPSignalStateFactory::EOpen); |
|
982 } |
|
983 |
|
984 |
|
985 |
|
986 /**************************************************************************/ |
|
987 // Implementation of void TL2CAPSigStateOpen |
|
988 // |
|
989 // L2Cap logical link open. Data can be sent and received. |
|
990 // |
|
991 TL2CAPSigStateOpen::TL2CAPSigStateOpen(const CL2CAPSignalStateFactory& aFactory) |
|
992 : TL2CAPSigState(aFactory) |
|
993 { |
|
994 LOG_FUNC |
|
995 } |
|
996 |
|
997 void TL2CAPSigStateOpen::ConfigRequest(CL2CapSAPSignalHandler& aSignalHandler, |
|
998 HConfigureRequest* aConfigRequest) const |
|
999 { |
|
1000 LOG_FUNC |
|
1001 // Starts of reconfiguration instigated by remote device |
|
1002 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConfig)); |
|
1003 |
|
1004 // Inform the data plane [via the SAP] that reconfig is in progress and data |
|
1005 // should not be sent until it completes. |
|
1006 aSignalHandler.ReconfiguringChannel(); |
|
1007 static_cast<void>(aSignalHandler.HandleConfigureRequest(aConfigRequest)); |
|
1008 |
|
1009 // Start local reconfiguration. |
|
1010 aSignalHandler.ConfigureChannelRequest(); |
|
1011 } |
|
1012 |
|
1013 TInt TL2CAPSigStateOpen::UpdateChannelConfig(CL2CapSAPSignalHandler& aSignalHandler, const TL2CapConfig& aAPIConfig) const |
|
1014 { |
|
1015 LOG_FUNC |
|
1016 TBool reconfigRequired = EFalse; |
|
1017 TInt rerr = aSignalHandler.ChannelConfig().UpdateConfigAPIChange(aAPIConfig, reconfigRequired); |
|
1018 if (reconfigRequired && rerr == KErrNone) |
|
1019 { |
|
1020 aSignalHandler.ReconfiguringChannel(); |
|
1021 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConfig)); |
|
1022 aSignalHandler.ConfigureChannelRequest(); |
|
1023 rerr = KErrL2CAPConfigPending; |
|
1024 } |
|
1025 return rerr; |
|
1026 } |
|
1027 |
|
1028 |
|
1029 void TL2CAPSigStateOpen::CloseChannelRequest(CL2CapSAPSignalHandler& aSignalHandler) const |
|
1030 { |
|
1031 LOG_FUNC |
|
1032 // Disconnect the channel. |
|
1033 HandleSAPDisconnect(aSignalHandler); |
|
1034 } |
|
1035 |
|
1036 void TL2CAPSigStateOpen::DisconnectRequest(CL2CapSAPSignalHandler& aSignalHandler, TUint8 aId) const |
|
1037 { |
|
1038 LOG_FUNC |
|
1039 // A Disconnect Request has been received and therefore no |
|
1040 // more data can be sent. Close the outgoing SDU queue. |
|
1041 aSignalHandler.SAP()->CloseOutgoingSDUQueue(); |
|
1042 |
|
1043 // Call a common helper function to handle the Disconnect Request. |
|
1044 HandleDisconnectRequest(aSignalHandler, aId); |
|
1045 } |
|
1046 |
|
1047 // "Artificial" state events |
|
1048 void TL2CAPSigStateOpen::Enter(CL2CapSAPSignalHandler& aSignalHandler) const |
|
1049 { |
|
1050 LOG_FUNC |
|
1051 |
|
1052 TBool downgrade = EFalse; |
|
1053 TInt err = aSignalHandler.ChannelConfig().FecNegotiator().CheckNegotiatedChannelMode(downgrade); |
|
1054 if (err != KErrNone) |
|
1055 { |
|
1056 DisconnectWithError(aSignalHandler, err); |
|
1057 } |
|
1058 else if (downgrade) |
|
1059 { |
|
1060 LOG(_L("CL2CapSigStateOpen::Enter doing reconfig")); |
|
1061 // now get reconfiguring |
|
1062 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EWaitConfig)); |
|
1063 aSignalHandler.ConfigureChannelRequest(); |
|
1064 } |
|
1065 else |
|
1066 { |
|
1067 // Remove and park override. |
|
1068 aSignalHandler.UndoOverrideParkMode(); |
|
1069 |
|
1070 // Cancel the configuration timer. |
|
1071 aSignalHandler.CancelTimer(); |
|
1072 |
|
1073 // Inform the SAP that the channel is now configured and ready to use. |
|
1074 aSignalHandler.SAP()->ChannelConfigured(aSignalHandler.ChannelConfig(), |
|
1075 aSignalHandler.Mux(), |
|
1076 aSignalHandler.LocalPort(), |
|
1077 aSignalHandler.RemotePort()); |
|
1078 } |
|
1079 } |
|
1080 |
|
1081 TBool TL2CAPSigStateOpen::IsChannelOpen() const |
|
1082 { |
|
1083 return ETrue; |
|
1084 } |
|
1085 |
|
1086 TInt TL2CAPSigStateOpen::GetNegotiatedChannelMode(const CL2CapSAPSignalHandler& aSignalHandler, TL2CapChannelMode& aMode) const |
|
1087 { |
|
1088 return aSignalHandler.ChannelConfig().GetChannelMode(aMode); |
|
1089 } |
|
1090 |
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1091 /**************************************************************************/ |
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1092 // Implementation of void TL2CAPSigStateWaitDisconnect |
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1093 // |
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1094 // Logical link still exists but is waiting to be disconnected. |
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1095 // NB Signalling can still be received, and should be handled. |
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1096 // |
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1097 TL2CAPSigStateWaitDisconnect::TL2CAPSigStateWaitDisconnect(const CL2CAPSignalStateFactory& aFactory) |
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1098 : TL2CAPSigState(aFactory) |
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1099 { |
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1100 LOG_FUNC |
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1101 } |
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1102 |
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1103 // L2CAP commands received from the peer. |
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1104 void TL2CAPSigStateWaitDisconnect::DisconnectRequest(CL2CapSAPSignalHandler& aSignalHandler, TUint8 aId) const |
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1105 { |
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1106 LOG_FUNC |
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1107 // We may have a ConfigReq awaiting response. This DisconnectReq may be coming from |
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1108 // a State 2 peer that didn't like our ConfigReq and disconnected immediately instead |
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1109 // of sending a ConfigRsp. Which means we should flush the ConfigReq so that we don't |
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1110 // wait forever. We can delete all commands in WAIT_DISCONNECT anyway: |
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1111 // - the only response we really wait for in WAIT_DISCONNECT is the DisconnectRsp, |
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1112 // but since peer has just sent us a DisconnectReq on its own, we know it's closing |
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1113 // anyway and it doesn't matter if it's received our DisconnectReq; |
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1114 // - the rest of the commands - Connect, Configure - can be just flushed - they don't |
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1115 // matter once we enter the disconnection path. |
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1116 aSignalHandler.FlushAllQueues(); |
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1117 |
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1118 // Call a common helper function to handle the Disconnect Request. |
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1119 HandleDisconnectRequest(aSignalHandler, aId); |
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1120 } |
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1121 |
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1122 void TL2CAPSigStateWaitDisconnect::DisconnectResponse(CL2CapSAPSignalHandler& aSignalHandler) const |
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1123 { |
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1124 LOG_FUNC |
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1125 aSignalHandler.DrainPendingCommands(); |
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1126 } |
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1127 |
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1128 // "Artificial" state events |
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1129 void TL2CAPSigStateWaitDisconnect::PendingCommandsDrained(CL2CapSAPSignalHandler& aSignalHandler) const |
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1130 { |
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1131 LOG_FUNC |
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1132 // If an error condition has been recorded forward the error |
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1133 // to the SAP. |
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1134 if(aSignalHandler.SignalHandlerErrorCode() != KErrNone) |
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1135 { |
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1136 Error(aSignalHandler, aSignalHandler.SignalHandlerErrorCode(), aSignalHandler.SignalHandlerErrorAction()); |
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1137 } |
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1138 else |
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1139 { |
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1140 // This will delete the signal handler if the SAP has detached. |
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1141 aSignalHandler.SetState(iFactory.GetState(CL2CAPSignalStateFactory::EClosed)); |
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1142 aSignalHandler.SignalHandlerDisconnectedCanClose(); |
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1143 } |
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1144 } |
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1145 |
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1146 void TL2CAPSigStateWaitDisconnect::Enter(CL2CapSAPSignalHandler& aSignalHandler) const |
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1147 { |
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1148 LOG_FUNC |
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1149 // Override park to allow the disconnect to continue. |
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1150 aSignalHandler.OverrideParkMode(); |
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1151 |
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1152 // Cancel the configuration timer. |
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1153 aSignalHandler.CancelTimer(); |
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1154 } |
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1155 |
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1156 void TL2CAPSigStateWaitDisconnect::CloseChannelRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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1157 { |
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1158 LOG_FUNC |
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1159 // Already disconnecting. |
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1160 } |
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1161 |
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1162 TInt TL2CAPSigStateWaitDisconnect::UpdateChannelConfig(CL2CapSAPSignalHandler& /*aSignalHandler*/, const TL2CapConfig& /*aAPIConfig*/) const |
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1163 { |
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1164 LOG_FUNC |
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1165 // Disconnecting - no point. |
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1166 return KErrDisconnected; |
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1167 } |
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1168 |
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1169 void TL2CAPSigStateWaitDisconnect::ConnectResponse(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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1170 HConnectionResponse* /*aConnectionResponse*/) const |
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1171 { |
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1172 LOG_FUNC |
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1173 // Could be here if we disconnect between receiving a pending connect response and |
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1174 // a final one. |
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1175 } |
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1176 |
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1177 void TL2CAPSigStateWaitDisconnect::ConfigRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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1178 HConfigureRequest* /*aConfigRequest*/) const |
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1179 { |
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1180 LOG_FUNC |
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1181 // This often happens under the following scenario: |
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1182 // 1. Connection Req/Rsp are exchanged and the local entity sends a Config Req. |
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1183 // 2. Local entity sends Config Req first. |
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1184 // 3. Remote responds with Config Rsp Unacceptable Parameters which is not acceptable |
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1185 // for us and hence we decide to disconnect, send a DisconnectReq and enter this |
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1186 // state (WAIT_DISCONNECT). |
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1187 // 4. Remote legitimately sends ConfigReq before it gets the DisconnectReq and we end |
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1188 // up here. |
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1189 // |
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1190 // The state tables in the spec say we should respond with a CmdRej Invalid CID but it is |
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1191 // unneeded and introduces a bit of unnecessary chaos. Let's ignore this ConfigReq and wait |
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1192 // until the remote acknowledges disconnection. If it retransmits the ConfigReq after that, |
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1193 // we'll then respond with a CmdRej Invalid CID which will be closer to the truth and won't |
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1194 // cause more unnecessary traffic. |
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1195 } |
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1196 |
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1197 void TL2CAPSigStateWaitDisconnect::ConfigResponse(CL2CapSAPSignalHandler& /*aSignalHandler*/, |
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1198 HConfigureResponse* /*aConfigResponse*/) const |
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1199 { |
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1200 LOG_FUNC |
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1201 // Could well be in this state - just drop. |
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1202 } |
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1203 |
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1204 void TL2CAPSigStateWaitDisconnect::ConfigureChannelRequest(CL2CapSAPSignalHandler& /*aSignalHandler*/) const |
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1205 { |
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1206 LOG_FUNC |
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1207 // This may be called if an Information Request times out |
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1208 // waiting for an Information Response, and we have since |
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1209 // moved into the Wait Disconnect state. Therefore don't |
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1210 // panic, however there is nothing else we can do here. |
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1211 } |
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1212 |
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1213 |
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1214 /**************************************************************************/ |
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1215 // CL2CAPSignalStateFactory implementation |
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1216 // |
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1217 // That which creates the states, and manages state change |
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1218 // |
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1219 CL2CAPSignalStateFactory::CL2CAPSignalStateFactory() |
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1220 { |
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1221 LOG_FUNC |
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1222 } |
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1223 |
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1224 CL2CAPSignalStateFactory::~CL2CAPSignalStateFactory() |
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1225 { |
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1226 LOG_FUNC |
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1227 // Destroy all the state objects |
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1228 iSigStates.DeleteAll(); |
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1229 } |
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1230 |
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1231 CL2CAPSignalStateFactory* CL2CAPSignalStateFactory::NewL() |
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1232 { |
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1233 LOG_STATIC_FUNC |
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1234 CL2CAPSignalStateFactory* factory= new (ELeave) CL2CAPSignalStateFactory(); |
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1235 CleanupStack::PushL(factory); |
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1236 factory->ConstructL(); |
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1237 CleanupStack::Pop(); |
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1238 return factory; |
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1239 } |
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1240 |
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1241 void CL2CAPSignalStateFactory::ConstructL() |
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1242 { |
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1243 LOG_FUNC |
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1244 // Create all the new states |
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1245 iSigStates[EClosed] = new (ELeave) TL2CAPSigStateClosed(*this); |
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1246 iSigStates[EWaitConnectRsp] = new (ELeave) TL2CAPSigStateWaitConnectRsp(*this); |
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1247 iSigStates[EWaitConnect] = new (ELeave) TL2CAPSigStateWaitConnect(*this); |
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1248 iSigStates[EWaitConfig] = new (ELeave) TL2CAPSigStateWaitConfig(*this); |
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1249 iSigStates[EWaitSendConfig] = new (ELeave) TL2CAPSigStateWaitSendConfig(*this); |
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1250 iSigStates[EWaitConfigReqRsp] = new (ELeave) TL2CAPSigStateWaitConfigReqRsp(*this); |
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1251 iSigStates[EWaitConfigRsp] = new (ELeave) TL2CAPSigStateWaitConfigRsp(*this); |
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1252 iSigStates[EWaitConfigReq] = new (ELeave) TL2CAPSigStateWaitConfigReq(*this); |
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1253 iSigStates[EOpen] = new (ELeave) TL2CAPSigStateOpen(*this); |
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1254 iSigStates[EWaitDisconnect] = new (ELeave) TL2CAPSigStateWaitDisconnect(*this); |
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1255 |
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1256 LOG1(_L("L2CAP SigState Closed = 0x%08x"), iSigStates[EClosed]); |
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1257 LOG1(_L("L2CAP SigState WaitConnectRsp = 0x%08x"), iSigStates[EWaitConnectRsp]); |
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1258 LOG1(_L("L2CAP SigState WaitConnect = 0x%08x"), iSigStates[EWaitConnect]); |
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1259 LOG1(_L("L2CAP SigState WaitConfig = 0x%08x"), iSigStates[EWaitConfig]); |
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1260 LOG1(_L("L2CAP SigState WaitSendConfig= 0x%08x"), iSigStates[EWaitSendConfig]); |
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1261 LOG1(_L("L2CAP SigState WaitConfigReqRsp = 0x%08x"), iSigStates[EWaitConfigReqRsp]); |
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1262 LOG1(_L("L2CAP SigState WaitConfigRsp = 0x%08x"), iSigStates[EWaitConfigRsp]); |
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1263 LOG1(_L("L2CAP SigState WaitConfigReq = 0x%08x"), iSigStates[EWaitConfigReq]); |
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1264 LOG1(_L("L2CAP SigState Open = 0x%08x"), iSigStates[EOpen]); |
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1265 LOG1(_L("L2CAP SigState WaitDisconnect = 0x%08x"), iSigStates[EWaitDisconnect]); |
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1266 } |
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1267 |
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1268 TL2CAPSigState& CL2CAPSignalStateFactory::GetState(const TSigStates aState) const |
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1269 { |
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1270 LOG_FUNC |
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1271 __ASSERT_DEBUG(aState != EMaxState, Panic(EL2CAPMuxerStateOutOfBounds)); |
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1272 return *iSigStates[aState]; |
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1273 } |
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1274 |
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1275 TInt CL2CAPSignalStateFactory::StateIndex(const TL2CAPSigState* aState) const |
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1276 { |
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1277 LOG_FUNC |
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1278 TInt state; |
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1279 for (state = 0; state < EMaxState; state++) |
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1280 { |
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1281 if (iSigStates[state] == aState) |
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1282 { |
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1283 return state; |
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1284 } |
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1285 } |
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1286 |
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1287 return KL2UnknownState; |
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1288 } |
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1289 |