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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 // Holds a list of all Muxers and listening SAP signal handlers. |
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15 // |
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16 // |
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17 |
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18 #include <bluetooth/logger.h> |
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19 #include "l2capSAPSignalHandler.h" |
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20 #include "l2capMuxController.h" |
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21 #include "l2capCommand.h" |
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22 #include "l2signalmgr.h" |
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23 #include "l2util.h" |
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24 |
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25 #ifdef __FLOG_ACTIVE |
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26 _LIT8(KLogComponent, LOG_COMPONENT_L2CAP); |
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27 #endif |
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28 |
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29 CL2CAPMuxController::~CL2CAPMuxController() |
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30 { |
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31 LOG_FUNC |
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32 // Delete all L2Cap Muxers |
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33 TDblQueIter<CL2CAPMux> muxIter(iMuxers); |
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34 CL2CAPMux* muxerPtr; |
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35 while((muxerPtr = muxIter++) != NULL) |
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36 { |
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37 delete muxerPtr; |
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38 } |
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39 |
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40 // Delete all the listening SAP Signal Handlers |
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41 TDblQueIter<CL2CapSAPSignalHandler> listeningSapIter(iListeningSapSignalHandlers); |
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42 CL2CapSAPSignalHandler* sapSignalPtr; |
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43 while((sapSignalPtr = listeningSapIter++) != NULL) |
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44 { |
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45 delete sapSignalPtr; |
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46 } |
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47 |
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48 // Delete all the bound SAP Signal Handlers |
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49 TDblQueIter<CL2CapSAPSignalHandler> boundSapIter(iBoundSapSignalHandlers); |
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50 while((sapSignalPtr = boundSapIter++) != NULL) |
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51 { |
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52 delete sapSignalPtr; |
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53 } |
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54 } |
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55 |
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56 |
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57 CL2CAPMuxController::CL2CAPMuxController(CL2CAPProtocol& aProtocol) |
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58 : |
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59 iMuxers(_FOFF(CL2CAPMux, iMuxControllerLink)), |
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60 iBoundSapSignalHandlers(_FOFF(CL2CapSAPSignalHandler, iLink)), |
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61 iListeningSapSignalHandlers(_FOFF(CL2CapSAPSignalHandler, iLink)), |
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62 iProtocol(aProtocol) |
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63 { |
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64 LOG_FUNC |
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65 } |
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66 |
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67 // This method is called to register the signal handler owned by a cloned SAP to the |
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68 // appropriate Mux. A Mux should always be available as this event has been triggered |
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69 // by receipt of an incoming connection. |
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70 TInt CL2CAPMuxController::AttachPassiveSignalHandler(CL2CapSAPSignalHandler& aSAPSignalHandler,const TBTDevAddr& aAddr) |
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71 { |
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72 LOG_FUNC |
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73 // Find the muxer and register the SAP SH. |
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74 TInt rerr = KErrNone; |
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75 |
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76 CL2CAPMux* mux = FindMuxer(aAddr); |
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77 if(mux) |
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78 { |
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79 mux->RegisterSAPSignalHandler(aSAPSignalHandler); |
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80 } |
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81 else |
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82 { |
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83 rerr = KErrSessionClosed; |
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84 } |
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85 return rerr; |
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86 } |
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87 |
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88 // This method is called to register an active SAP signal handler to the appropriate Mux. |
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89 // If the Mux does not exist a new one will be allocated and tasked with establishing |
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90 // an ACL connection. |
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91 TInt CL2CAPMuxController::AttachActiveSignalHandler(CL2CapSAPSignalHandler& aSAPSignalHandler,const TBTDevAddr& aAddr) |
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92 { |
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93 LOG_FUNC |
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94 TInt rerr = KErrNone; |
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95 |
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96 CL2CAPMux* mux = FindMuxer(aAddr); |
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97 if(mux) |
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98 { |
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99 mux->RegisterSAPSignalHandler(aSAPSignalHandler); |
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100 } |
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101 else |
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102 { |
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103 TRAP(rerr, mux = CreateMuxerL(aAddr)); |
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104 if(rerr == KErrNone) |
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105 { |
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106 mux->RegisterSAPSignalHandler(aSAPSignalHandler); |
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107 aSAPSignalHandler.ActiveConnectionRequest(); |
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108 } |
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109 } |
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110 return rerr; |
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111 } |
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112 |
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113 |
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114 // This method adds a listening SAP signal handler to the list of current listeners. |
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115 void CL2CAPMuxController::AttachListeningSignalHandler(CL2CapSAPSignalHandler& aSAPSignalHandler) |
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116 { |
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117 LOG_FUNC |
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118 iListeningSapSignalHandlers.AddLast(aSAPSignalHandler); |
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119 } |
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120 |
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121 // This method adds a bound SAP signal handler to the bound list. |
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122 void CL2CAPMuxController::AttachBoundSignalHandler(CL2CapSAPSignalHandler& aSAPSignalHandler) |
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123 { |
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124 LOG_FUNC |
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125 iBoundSapSignalHandlers.AddLast(aSAPSignalHandler); |
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126 } |
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127 |
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128 TInt CL2CAPMuxController::BearerConnectComplete(const TBTDevAddr& aAddr, CServProviderBase* aSAP) |
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129 { |
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130 LOG_FUNC |
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131 TInt retVal; |
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132 CL2CAPMux* muxer = FindMuxer(aAddr); |
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133 if(!muxer) |
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134 { |
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135 // If no error occurs, ownership of aSSP passes to the Mux; |
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136 TRAP(retVal, muxer = CreateMuxerL(aAddr)); |
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137 if(retVal == KErrNone) |
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138 { |
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139 TRAP(retVal, muxer->CompleteACLConnect(aSAP)); |
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140 } |
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141 } |
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142 else |
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143 { |
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144 retVal = KErrAlreadyExists; |
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145 } |
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146 |
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147 return retVal; |
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148 } |
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149 |
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150 CL2CAPMux* CL2CAPMuxController::FindMuxer(const TBTDevAddr& aAddr) |
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151 /** |
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152 Find muxer by BT address. |
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153 Lookup this address to find if there's a L2CAP Mux associated |
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154 with it |
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155 **/ |
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156 { |
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157 LOG_FUNC |
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158 TDblQueIter<CL2CAPMux> muxIter(iMuxers); |
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159 muxIter.SetToFirst(); |
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160 CL2CAPMux* muxerPtr = NULL; |
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161 |
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162 while((muxerPtr = muxIter++) != NULL) |
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163 { |
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164 if(muxerPtr->RemoteBTAddr() == aAddr) |
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165 { |
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166 break; |
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167 } |
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168 } |
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169 return muxerPtr; |
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170 } |
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171 |
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172 CL2CAPMux* CL2CAPMuxController::CreateMuxerL(const TBTDevAddr& aAddr) |
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173 /** |
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174 Create a new L2CAP Mux. |
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175 |
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176 The muxer returned is owned by this CL2CAPMuxController -- it |
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177 does not hand over ownership of the mux to the caller. |
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178 |
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179 Note that this function does not check (except in debug) that there |
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180 is no existing muxer. |
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181 |
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182 **/ |
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183 { |
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184 LOG_FUNC |
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185 __ASSERT_DEBUG(!FindMuxer(aAddr), Panic(EL2CAPMuxAlreadyExists)); |
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186 |
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187 CL2CAPMux* muxer = CL2CAPMux::NewL(*this, aAddr); |
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188 |
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189 iMuxers.AddFirst(*muxer); |
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190 return muxer; |
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191 } |
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192 |
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193 CL2CapSAPSignalHandler* CL2CAPMuxController::FindListeningSignalHandler(TL2CAPPort aPort) |
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194 { |
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195 LOG_FUNC |
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196 /** Searches the listening Q for a SAP listening at PSM: aPort |
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197 @return the listening SAP found, or zero (NULL) if not found. |
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198 **/ |
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199 |
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200 TDblQueIter<CL2CapSAPSignalHandler> sapIter(iListeningSapSignalHandlers); |
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201 CL2CapSAPSignalHandler* sapSignalPtr; |
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202 |
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203 while((sapSignalPtr = sapIter++) != NULL) |
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204 { |
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205 if(sapSignalPtr->LocalPort() == aPort) |
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206 return sapSignalPtr; |
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207 } |
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208 |
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209 return NULL; |
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210 } |
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211 |
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212 CL2CapSAPSignalHandler* CL2CAPMuxController::FindIdleSignalHandler(TL2CAPPort aPort) |
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213 { |
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214 LOG_FUNC |
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215 /** Searches the bound Q for a SAP bound to PSM: aPort and if it doesn't find one it |
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216 then searches the listening Q. |
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217 @return the idle SAP found, or zero (NULL) if not found. |
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218 **/ |
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219 |
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220 TDblQueIter<CL2CapSAPSignalHandler> sapIter(iBoundSapSignalHandlers); |
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221 CL2CapSAPSignalHandler* sapSignalPtr; |
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222 |
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223 while((sapSignalPtr = sapIter++) != NULL) |
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224 { |
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225 if(sapSignalPtr->LocalPort() == aPort) |
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226 return sapSignalPtr; |
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227 } |
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228 |
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229 return FindListeningSignalHandler(aPort); |
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230 } |
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231 |
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232 void CL2CAPMuxController::UpdateMuxerPriorities() |
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233 { |
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234 LOG_FUNC |
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235 TDblQueIter<CL2CAPMux> muxIter(iMuxers); |
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236 CL2CAPMux* muxerPtr; |
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237 |
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238 // Lowest muxer priority. |
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239 TInt muxerPriority = EBaseMuxerPriority; |
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240 |
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241 // This starting value is equivalent to one or all of the channels |
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242 // open on a Mux being of priority low. |
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243 TInt currentSumMuxerPriorities = 0; |
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244 TInt nextSumMuxerPriorities; |
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245 TInt sum; |
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246 |
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247 while(currentSumMuxerPriorities != KMaxTInt) |
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248 { |
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249 nextSumMuxerPriorities = KMaxTInt; |
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250 |
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251 muxIter.SetToFirst(); |
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252 while((muxerPtr = muxIter++) != NULL) |
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253 { |
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254 sum = muxerPtr->GetSumMuxerChannelPriorities(); |
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255 if(sum == currentSumMuxerPriorities) |
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256 { |
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257 muxerPtr->MuxerPriorityUpdate(muxerPriority); |
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258 } |
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259 |
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260 if(sum > currentSumMuxerPriorities && sum < nextSumMuxerPriorities) |
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261 { |
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262 nextSumMuxerPriorities = sum; |
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263 } |
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264 } |
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265 currentSumMuxerPriorities = nextSumMuxerPriorities; |
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266 muxerPriority++; |
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267 } |
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268 } |
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269 |
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270 TInt CL2CAPMuxController::FindFreeUserPSM(TL2CAPPort& aPSM) |
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271 { |
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272 LOG_FUNC |
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273 TInt rerr = KErrL2CAPNoMorePSMs; |
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274 aPSM = KL2CapDynamicPSMStart; |
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275 |
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276 // The PSM value will eventually wrap round if a free PSM |
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277 // can't be found. |
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278 while(aPSM >= KL2CapDynamicPSMStart) |
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279 { |
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280 if(FindIdleSignalHandler(aPSM) == NULL) |
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281 { |
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282 // There is not currently a SAP listening on this |
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283 // PSM, so this will be chosen. |
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284 rerr = KErrNone; |
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285 break; |
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286 } |
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287 aPSM+=2; |
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288 } |
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289 |
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290 return rerr; |
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291 } |
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292 |