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1 /* |
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2 * Copyright (c) 2004-2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * This class handles data exchange between BTSap server and client |
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16 * |
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17 */ |
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18 |
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19 |
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20 // INCLUDE FILES |
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21 #include <bt_sock.h> |
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22 #include <btextnotifiers.h> // Needed to check the NOTIFIERS_SUPPORT_PASSKEY_MIN_LENGTH flag |
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23 #include <btengdiscovery.h> |
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24 #include <btengconstants.h> |
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25 #include "BTSapSocketHandler.h" |
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26 #include "BTSapServerState.h" |
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27 #include "BTSapSecurityHandler.h" |
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28 #include "debug.h" |
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29 |
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30 // Old versions of RAN always try to connect to the same channel after pairing |
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31 // To solve this problem, we try to use always the same channel |
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32 const TUint KBTSapProposedChannel = 21; // 21 is big enough and my lucky number ;) |
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33 const TInt KListenQueSize = 1; |
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34 |
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35 CBTSapSocketHandler::CBTSapSocketHandler(CBTSapServerState& aServerState, CBTSapRequestHandler& aRequestHandler) |
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36 : CActive(CActive::EPriorityHigh), |
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37 iServerState(aServerState), |
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38 iChannel(0), |
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39 iStateListen(iSockServ, iSocket, iListener, iChannel), |
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40 iStateRecv(iSocket, aRequestHandler, &iSniffHandler), |
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41 iStateSend(iSocket), |
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42 iStateCheckSecurity(iSocket, iSecurityHandler), |
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43 iCurrentState(EBTSapSocketStateListen), |
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44 iNextState(EBTSapSocketStateRecv) |
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45 { |
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46 iStateArray.Append(&iStateListen); |
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47 iStateArray.Append(&iStateRecv); |
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48 iStateArray.Append(&iStateSend); |
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49 iStateArray.Append(&iStateCheckSecurity); |
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50 |
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51 CActiveScheduler::Add(this); |
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52 } |
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53 |
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54 // Destructor. |
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55 CBTSapSocketHandler::~CBTSapSocketHandler() |
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56 { |
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57 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] ~CBTSapSocketHandler"))); |
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58 |
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59 Cancel(); |
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60 iStateArray.Close(); |
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61 |
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62 TRAPD(err, UnregisterBTSapServiceL()); |
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63 if(err != KErrNone) |
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64 { |
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65 BTSAP_TRACE_OPT(KBTSAP_TRACE_ERROR, BTSapPrintTrace(_L("[BTSap] ~CBTSapSocketHandler - Couldn't unregister SAP Service!!!"))); |
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66 } |
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67 |
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68 delete iSecurityHandler; |
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69 iSocket.Close(); |
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70 iListener.Close(); |
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71 iSockServ.Close(); |
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72 delete iBtDiscovery; |
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73 delete iSniffHandler; |
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74 } |
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75 |
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76 // --------------------------------------------------------- |
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77 // CBTSapSocketHandler::NewL() |
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78 // --------------------------------------------------------- |
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79 // |
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80 CBTSapSocketHandler* CBTSapSocketHandler::NewL(CBTSapServerState& aServerState, CBTSapRequestHandler& aRequestHandler) |
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81 { |
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82 CBTSapSocketHandler* self = new (ELeave) CBTSapSocketHandler(aServerState, aRequestHandler); |
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83 CleanupStack::PushL(self); |
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84 self->ConstructL(); |
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85 CleanupStack::Pop(); |
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86 return self; |
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87 } |
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88 |
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89 // --------------------------------------------------------- |
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90 // CBTSapSocketHandler::ConstructL |
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91 // --------------------------------------------------------- |
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92 // |
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93 void CBTSapSocketHandler::ConstructL() |
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94 { |
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95 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: ConstructL"))); |
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96 |
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97 RegisterBTSapServiceL(); |
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98 |
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99 iSecurityHandler = CBTSapSecurityHandler::NewL(); |
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100 // Now create the Sniff Handler |
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101 iSniffHandler = CBTSapSniffHandler::NewL(iSocket, iSockServ); |
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102 } |
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103 |
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104 // --------------------------------------------------------- |
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105 // CBTSapSocketHandler::DoCancel |
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106 // --------------------------------------------------------- |
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107 // |
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108 void CBTSapSocketHandler::DoCancel() |
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109 { |
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110 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: DoCancel"))); |
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111 iStateArray[iCurrentState]->Cancel(); |
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112 } |
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113 |
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114 // --------------------------------------------------------- |
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115 // RunL |
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116 // --------------------------------------------------------- |
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117 // |
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118 void CBTSapSocketHandler::RunL() |
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119 { |
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120 TInt status = iStatus.Int(); |
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121 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: RunL: %d"), status)); |
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122 TBool disconnecting = EFalse; |
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123 |
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124 if (iNextState == EBTSapSocketStateListen) |
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125 { |
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126 // In case we are here, we are disconnecting existing connection |
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127 disconnecting = ETrue; |
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128 } |
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129 |
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130 if (status >= KErrNone) |
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131 { |
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132 TBTSapSocketState nextState = iStateArray[iCurrentState]->Complete(status); |
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133 |
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134 if (iCurrentState == EBTSapSocketStateListen) |
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135 { |
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136 // The remote side has created SAP connection |
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137 // In order to save RAM, the SAP states are not created until here |
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138 iServerState.CreateStatesL(); |
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139 } |
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140 |
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141 if (iNextState == EBTSapSocketStateRecv) |
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142 { |
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143 iNextState = nextState; |
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144 } |
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145 |
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146 ChangeState(); |
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147 } |
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148 else |
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149 { |
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150 // BT link loss or other socket errors |
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151 iCurrentState = EBTSapSocketStateRecvWrong; |
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152 iServerState.ChangeState(EStateNotConnected); |
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153 } |
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154 |
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155 if (disconnecting) |
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156 { |
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157 // Disconnect has been completed, notify caller |
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158 iServerState.DisconnectCompleteL(status); |
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159 } |
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160 } |
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161 |
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162 // --------------------------------------------------------- |
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163 // CBTSapSocketHandler::Listen |
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164 // --------------------------------------------------------- |
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165 void CBTSapSocketHandler::Listen() |
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166 { |
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167 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: Listen"))); |
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168 |
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169 iNextState = EBTSapSocketStateListen; |
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170 |
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171 if (iCurrentState != EBTSapSocketStateSend) |
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172 { |
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173 Cancel(); |
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174 ChangeState(); |
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175 } |
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176 |
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177 // In order to save RAM, release the SAP states here and create |
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178 // them when the connection has been created. |
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179 TRAP_IGNORE( iServerState.ReleaseStatesL() ); |
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180 |
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181 // Make sure the sniffer is disabled when we're listening for an incoming connection |
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182 iSniffHandler->Disable(); |
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183 } |
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184 |
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185 // --------------------------------------------------------- |
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186 // CBTSapSocketHandler::Send |
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187 // --------------------------------------------------------- |
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188 void CBTSapSocketHandler::Send(const TDes8& aResponseData) |
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189 { |
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190 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: Send"))); |
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191 |
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192 if (iCurrentState == EBTSapSocketStateRecv || |
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193 iCurrentState == EBTSapSocketStateSend) |
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194 { |
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195 iStateSend.SetResponseData(aResponseData); |
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196 iNextState = EBTSapSocketStateSend; |
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197 |
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198 if (iCurrentState == EBTSapSocketStateRecv) |
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199 { |
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200 Cancel(); |
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201 ChangeState(); |
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202 } |
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203 } |
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204 } |
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205 |
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206 // --------------------------------------------------------- |
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207 // CBTSapSocketHandler::GetRemoteBTAddress |
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208 // --------------------------------------------------------- |
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209 TInt CBTSapSocketHandler::GetRemoteBTAddress(TBTDevAddr& aBTDevAddr) |
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210 { |
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211 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: GetRemoteBTAddress >>"))); |
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212 TInt retVal = KErrDisconnected; |
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213 |
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214 if (iCurrentState == EBTSapSocketStateRecv || |
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215 iCurrentState == EBTSapSocketStateSend) |
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216 { |
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217 TBTSockAddr addr; |
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218 iSocket.RemoteName(addr); |
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219 aBTDevAddr = addr.BTAddr(); |
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220 retVal = KErrNone; |
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221 } |
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222 |
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223 BTSAP_TRACE_OPT(KBTSAP_TRACE_INFO, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: GetRemoteBTAddress: %d"), retVal)); |
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224 return retVal; |
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225 } |
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226 |
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227 // --------------------------------------------------------- |
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228 // CBTSapSocketHandler::IsSapConnected |
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229 // --------------------------------------------------------- |
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230 TBool CBTSapSocketHandler::IsSapConnected() |
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231 { |
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232 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler::IsSapConnected"))); |
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233 return (iCurrentState != EBTSapSocketStateListen); |
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234 } |
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235 |
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236 // --------------------------------------------------------- |
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237 // CBTSapSocketHandler::ChangeState |
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238 // --------------------------------------------------------- |
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239 void CBTSapSocketHandler::ChangeState() |
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240 { |
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241 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: ChangeState: %d"), iNextState)); |
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242 |
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243 iCurrentState = iNextState; |
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244 iNextState = EBTSapSocketStateRecv; |
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245 iStateArray[iCurrentState]->Enter(iStatus); |
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246 SetActive(); |
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247 } |
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248 |
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249 // --------------------------------------------------------- |
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250 // CBTSapSocketHandler::RegisterBTSapServiceL |
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251 // --------------------------------------------------------- |
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252 void CBTSapSocketHandler::RegisterBTSapServiceL() |
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253 { |
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254 BTSAP_TRACE_OPT(KBTSAP_TRACE_FUNCTIONS, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler::RegisterBTSapServiceL"))); |
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255 |
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256 User::LeaveIfError(iSockServ.Connect()); |
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257 TProtocolDesc pInfo; |
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258 iBtDiscovery = CBTEngDiscovery::NewL(); |
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259 TInt err = KErrNone; |
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260 |
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261 // Old version of RAN always use the same channel, so try to get a fixed one |
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262 iChannel = KBTSapProposedChannel; |
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263 |
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264 User::LeaveIfError(iSockServ.FindProtocol(TProtocolName(KRFCOMMDesC), pInfo)); // Or other protocol |
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265 User::LeaveIfError(iListener.Open( iSockServ, pInfo.iAddrFamily, pInfo.iSockType, pInfo.iProtocol)); |
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266 |
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267 TRfcommSockAddr addr; |
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268 TBTServiceSecurity sec; |
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269 |
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270 sec.SetAuthentication( EMitmRequired ); |
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271 sec.SetAuthorisation(ETrue); |
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272 sec.SetEncryption(ETrue); |
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273 sec.SetPasskeyMinLength(KRequiredPassKeyLen); |
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274 addr.SetSecurity(sec); |
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275 addr.SetPort(iChannel); |
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276 |
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277 // On return, _should_ contain a free RFCOMM port |
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278 err = iListener.Bind(addr); |
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279 |
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280 if(err) |
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281 { |
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282 TInt freeChnl; |
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283 err = iListener.GetOpt(KRFCOMMGetAvailableServerChannel, KSolBtRFCOMM, freeChnl); |
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284 if (err == KErrNone) |
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285 { |
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286 err = iListener.SetLocalPort(freeChnl); |
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287 iChannel = freeChnl; |
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288 } |
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289 } |
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290 if(err) |
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291 { |
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292 // Try to bind using KRfcommPassiveAutoBind |
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293 iChannel = KRfcommPassiveAutoBind; |
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294 addr.SetPort(iChannel); |
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295 err = iListener.Bind(addr); |
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296 } |
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297 |
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298 if (!err) |
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299 { |
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300 // Update with the actual value |
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301 iChannel = iListener.LocalPort(); |
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302 |
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303 // Set the socket to listening |
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304 User::LeaveIfError(iListener.Listen(KListenQueSize)); |
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305 } |
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306 else |
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307 { |
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308 BTSAP_TRACE_OPT(KBTSAP_TRACE_ERROR, BTSapPrintTrace(_L("[BTSap] CBTSapSocketHandler: RegisterBTSapServiceL: Couldn't register dynamic channel!!! (err = %d)"), err)); |
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309 User::Leave( err ); |
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310 } |
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311 |
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312 // register BTSap service profile |
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313 TUUID uuid(EBTProfileSAP); |
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314 User::LeaveIfError( iBtDiscovery->RegisterSdpRecord(uuid, iChannel, iSdpHandle) ); |
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315 } |
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316 |
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317 // --------------------------------------------------------- |
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318 // CBTSapSocketHandler::UnregisterBTSapServiceL |
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319 // --------------------------------------------------------- |
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320 void CBTSapSocketHandler::UnregisterBTSapServiceL() |
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321 { |
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322 if(iSdpHandle) |
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323 { |
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324 User::LeaveIfError(iBtDiscovery->DeleteSdpRecord(iSdpHandle)); |
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325 } |
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326 } |
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327 |
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328 // --------------------------------------------------------- |
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329 // CBTSapSocketHandler::TState::TState |
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330 // --------------------------------------------------------- |
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331 CBTSapSocketHandler::TState::TState(RSocket& aSocket) |
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332 : iSocket(aSocket) |
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333 { |
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334 } |
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335 |
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336 // End of File |