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1 // Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <bluetooth/logger.h> |
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17 #include <bt_sock.h> |
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18 #include <btsdp.h> |
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19 #include "sdp.h" |
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20 #include "sdpnetdb.h" |
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21 #include "sdppdu.h" |
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22 #include "sdpstackutil.h" |
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23 #include "sdpclient.h" |
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24 |
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25 #ifdef __FLOG_ACTIVE |
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26 _LIT8(KLogComponent, LOG_COMPONENT_SDP); |
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27 #endif |
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28 |
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29 CSdpClient::CSdpClient(CSdpProtocol& aProtocol, CProtocolBase& aL2CAP) |
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30 : iNetDbProviders(_FOFF(CSdpNetDbProvider, iLink)), |
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31 iOutboundQ(_FOFF(CSdpPdu, iLink)), |
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32 iProtocol(aProtocol), |
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33 iL2CAP(aL2CAP) |
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34 { |
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35 TCallBack cb(IdleTimerExpired, this); |
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36 iIdleTimerEntry.Set(cb); |
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37 } |
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38 |
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39 void CSdpClient::ConstructL() |
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40 { |
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41 iBoundSAP=iL2CAP.NewSAPL(KSockSeqPacket); |
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42 iBoundSAP->SetNotify(this); |
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43 CheckForIdle(KSDPIdleTimeout*4);// No point hanging about if no one connects |
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44 } |
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45 |
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46 CSdpClient* CSdpClient::NewL(CSdpProtocol& aProt, CProtocolBase& aL2CAP) |
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47 { |
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48 CSdpClient* self = new(ELeave) CSdpClient(aProt, aL2CAP); |
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49 CleanupStack::PushL(self); |
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50 self->ConstructL(); |
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51 CleanupStack::Pop(); |
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52 return self; |
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53 } |
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54 |
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55 CSdpClient::~CSdpClient() |
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56 { |
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57 delete iNextPacket; |
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58 delete iBoundSAP; |
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59 while (!iOutboundQ.IsEmpty()) |
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60 { |
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61 delete iOutboundQ.First(); |
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62 } |
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63 while (!iNetDbProviders.IsEmpty()) |
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64 {// Tell any lingering netdb's that we're gone. |
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65 iNetDbProviders.First()->ClientDown(); |
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66 // Note -- this will cause idle timer to be re-queued, |
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67 // so we must cancel it *after* taking netdbs down. |
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68 } |
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69 CancelIdleTimer(); |
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70 } |
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71 |
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72 /****************************************************************************/ |
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73 /* |
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74 Commands from protocol |
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75 */ |
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76 |
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77 void CSdpClient::Open(TBTDevAddr& aAddr) |
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78 /** |
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79 Create lower-layer link to the remote device. |
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80 |
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81 The bound sap will be used to |
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82 create an L2CAP link to the remote end over which the SDP |
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83 PDUs will flow. The client will then run this channel. |
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84 **/ |
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85 { |
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86 __ASSERT_DEBUG(!ChannelUp(), Panic(ESdpClientAlreadyConnected)); |
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87 iRemoteAddr=aAddr; |
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88 iBoundSAP->AutoBind(); |
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89 TL2CAPSockAddr remote; |
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90 remote.SetBTAddr(aAddr); |
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91 remote.SetPort(KSDPPSM); // Always 0x01 |
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92 if(iBoundSAP->SetRemName(remote)!=KErrNone) |
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93 { |
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94 Panic(ESdpErrorSettingAddress); |
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95 } |
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96 iBoundSAP->ActiveOpen(); // Signals ConnectComplete eventually! |
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97 } |
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98 |
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99 void CSdpClient::AddNetDbProvider(CSdpNetDbProvider& aNetDbProvider) |
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100 { |
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101 CancelIdleTimer(); |
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102 iNetDbProviders.AddFirst(aNetDbProvider); |
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103 if (ChannelUp()) |
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104 aNetDbProvider.ClientUp(); |
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105 } |
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106 |
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107 void CSdpClient::RemoveNetDbProvider(CSdpNetDbProvider& aNetDbProvider) |
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108 { |
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109 |
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110 if(!iOutboundQ.IsEmpty()) |
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111 { |
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112 |
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113 CSdpPdu* request = iOutboundQ.First(); |
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114 CSdpNetDbProvider* netdb = request->NetDbProvider(); |
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115 if(netdb == &aNetDbProvider) |
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116 request->iNetDbProvider = 0; |
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117 |
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118 TDblQueIter<CSdpPdu> iter(iOutboundQ); |
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119 while(iter) |
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120 { |
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121 request = iter++; |
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122 if(request->NetDbProvider()==&aNetDbProvider) |
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123 //NB 1st one is NULL so won't be deleted |
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124 delete request; |
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125 } |
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126 } |
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127 |
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128 aNetDbProvider.iLink.Deque(); |
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129 if (iNetDbProviders.IsEmpty()) |
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130 { |
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131 CheckForIdle(KSDPIdleTimeout); |
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132 } |
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133 } |
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134 |
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135 /****************************************************************************/ |
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136 /* |
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137 Commands for netdb provider |
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138 */ |
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139 |
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140 inline TUint8 DEHeader(TUint8 aType, TUint8 aSizeIndex) |
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141 /** |
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142 Make a data element header from aType and aSizeIndex. |
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143 aType occupies top 5 bits, aSizeIndex the bottom 3 bits. |
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144 **/ |
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145 {// Move aType 3 bits across. |
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146 return (TUint8)((aType << 3) | (aSizeIndex & 0x7)); |
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147 } |
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148 |
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149 void CSdpClient::ServiceSearchRequest(CSdpNetDbProvider& aNetDbProvider, |
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150 TUint16 aMaxCount, const TUUID &aUUID, const TDesC8& aContState) |
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151 { |
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152 if (!ChannelUp()) |
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153 { |
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154 aNetDbProvider.Error(KErrSdpClientNotConnected); |
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155 return; |
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156 } |
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157 CSdpPdu* pdu = new CSdpPdu(&aNetDbProvider); |
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158 if (!pdu) |
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159 { |
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160 aNetDbProvider.Error(KErrNoMemory); |
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161 return; |
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162 } |
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163 |
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164 TPtrC8 uuid(aUUID.ShortestForm()); |
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165 TInt len = uuid.Length(); |
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166 TUint8 szIndex = 0; |
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167 while (len >>= 1) |
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168 ++szIndex; |
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169 __ASSERT_DEBUG(uuid.Length() == (1<<szIndex), Panic(ESdpBadUUID)); |
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170 |
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171 pdu->SetPduId(EServiceSearchRequest); |
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172 pdu->SetTransid(NextTransId()); |
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173 pdu->PutByte(DEHeader(6,5)); // Header: DES, 1 byte length |
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174 pdu->PutByte(TUint8(1+uuid.Length()));// Size: Length of one UUID element |
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175 pdu->PutByte(DEHeader(3,szIndex)); // Header: 'len' byte UUID |
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176 pdu->PutData(uuid); // Data: The UUID |
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177 pdu->PutBigEndian16(aMaxCount); // Maximum Service record count |
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178 pdu->PutByte((TUint8)aContState.Length()); // Cont state length |
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179 pdu->PutData(aContState); |
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180 pdu->SetLength(); |
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181 EnqueOutboundPdu(*pdu); |
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182 } |
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183 |
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184 void CSdpClient::ServiceAttributeRequest(CSdpNetDbProvider& aNetDbProvider, |
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185 TUint aRecordHandle, TUint16 aMaxLength, TBool aRange, |
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186 TUint aAttribute, const TDesC8& aContState) |
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187 { |
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188 if (!ChannelUp()) |
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189 { |
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190 aNetDbProvider.Error(KErrSdpClientNotConnected); |
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191 return; |
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192 } |
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193 CSdpPdu* pdu = new CSdpPdu(&aNetDbProvider); |
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194 if (!pdu) |
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195 { |
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196 aNetDbProvider.Error(KErrNoMemory); |
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197 return; |
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198 } |
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199 |
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200 pdu->SetPduId(EServiceAttributeRequest); |
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201 pdu->SetTransid(NextTransId()); |
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202 pdu->PutBigEndian32(aRecordHandle); |
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203 pdu->PutBigEndian16(aMaxLength); |
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204 pdu->PutByte(DEHeader(6,5)); // Header: DES, 1 byte length |
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205 if (aRange) |
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206 {// Range of attribute IDs. Send 1 4-byte uint. |
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207 pdu->PutByte(5); // Size: Length of 16 uint element |
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208 pdu->PutByte(DEHeader(1,2)); // Header: 4 byte integer |
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209 pdu->PutBigEndian32(aAttribute);// Attribute ID range |
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210 } |
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211 else |
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212 {// Single attribute ID. Send 1 2-byte uint. |
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213 pdu->PutByte(3); // Size: Length of 32 uint element |
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214 pdu->PutByte(DEHeader(1,1)); // Header: 2 byte integer |
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215 pdu->PutBigEndian16(static_cast<TUint16>(aAttribute));// Single attribute ID |
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216 } |
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217 pdu->PutByte(static_cast<TUint8>(aContState.Length())); // Cont state length |
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218 pdu->PutData(aContState); |
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219 pdu->SetLength(); |
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220 EnqueOutboundPdu(*pdu); |
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221 } |
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222 |
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223 void CSdpClient::EncodedRequest(CSdpNetDbProvider& aNetDbProvider, |
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224 TUint8 aPduRequestId, |
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225 const TDesC8& aEncodedData) |
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226 { |
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227 if (!ChannelUp()) |
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228 { |
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229 aNetDbProvider.Error(KErrSdpClientNotConnected); |
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230 return; |
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231 } |
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232 CSdpPdu* pdu = new CSdpPdu(&aNetDbProvider); |
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233 if (!pdu) |
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234 { |
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235 aNetDbProvider.Error(KErrNoMemory); |
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236 return; |
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237 } |
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238 |
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239 pdu->SetPduId(aPduRequestId); |
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240 pdu->SetTransid(NextTransId()); |
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241 pdu->PutData(aEncodedData); |
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242 pdu->SetLength(); |
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243 EnqueOutboundPdu(*pdu); |
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244 } |
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245 |
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246 |
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247 /****************************************************************************/ |
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248 /* |
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249 Protocol MSocketNotify functions |
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250 Upcalls from L2CAP |
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251 */ |
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252 void CSdpClient::NewData(TUint aCount) |
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253 /** |
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254 New data arrived on lower SAP. |
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255 Read out the data straight away. |
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256 @param aCount Number of packets that have arrived. |
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257 **/ |
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258 { |
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259 LOG1(_L("SDP: New data, count %d"), aCount); |
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260 |
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261 TPckgBuf<TInt> mru; |
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262 TInt err = iBoundSAP->GetOption(KSolBtL2CAP, KL2CAPInboundMTU, mru); |
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263 if (err == KErrNone && (!iNextPacket || mru() > iNextPacket->Size())) |
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264 { |
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265 delete iNextPacket; |
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266 iNextPacket = HBufC8::New(mru()); |
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267 if (iNextPacket == 0) |
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268 { |
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269 err = KErrNoMemory; |
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270 } |
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271 } |
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272 if(err) |
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273 { |
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274 Error(err, EErrorFatal); |
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275 return; |
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276 } |
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277 |
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278 TPtr8 data = iNextPacket->Des(); |
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279 while (aCount) |
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280 { |
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281 data.SetMax(); |
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282 iBoundSAP->GetData(data, 0); |
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283 LOGHEXDESC(data) |
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284 ParseNextPacket(); |
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285 --aCount; |
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286 } |
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287 } |
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288 |
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289 void CSdpClient::CanSend() |
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290 { |
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291 L2CAPBlocked(EFalse); |
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292 TryToSend(); |
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293 } |
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294 |
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295 void CSdpClient::ConnectComplete() |
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296 /** |
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297 Right, we're connected. |
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298 Let all the netdbs waiting on us know. |
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299 Should check L2CAP MTU's now, but for now we're just |
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300 trusting that they'll be large enough to hold our very |
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301 small requests and responses, as we can't fragment anyway. |
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302 **/ |
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303 { |
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304 ChannelUp(ETrue); |
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305 TDblQueIter<CSdpNetDbProvider> iter(iNetDbProviders); |
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306 |
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307 while(iter) |
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308 { |
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309 (iter++)->ClientUp(); |
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310 } |
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311 } |
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312 |
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313 void CSdpClient::ConnectComplete(const TDesC8&) |
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314 { |
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315 Panic(ESdpConnectWithData); |
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316 } |
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317 |
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318 void CSdpClient::ConnectComplete(CServProviderBase&) |
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319 { |
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320 Panic(ESdpClientPassiveConnect); |
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321 } |
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322 |
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323 void CSdpClient::ConnectComplete(CServProviderBase&,const TDesC8& ) |
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324 { |
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325 Panic(ESdpClientPassiveConnect); |
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326 } |
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327 |
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328 void CSdpClient::CanClose(TDelete /*aDelete*/) |
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329 /** |
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330 Line ourselves up ready for deletion. |
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331 The bound SAP calling this upcall will be tided up when we are, |
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332 so there's no point getting carried away in doing it here. |
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333 **/ |
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334 { |
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335 iRemoteAddr.Reset(); |
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336 ChannelUp(EFalse); |
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337 TDblQueIter<CSdpNetDbProvider> iter(iNetDbProviders); |
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338 while(iter) |
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339 {//Tell the netdb's we're down. |
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340 (iter++)->ClientDown(); |
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341 } |
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342 CheckForIdle(0); // Async call back to delete ourselves! |
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343 } |
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344 |
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345 void CSdpClient::CanClose(const TDesC8&, TDelete) |
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346 { |
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347 Panic(ESdpDisconnectWithData); |
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348 } |
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349 |
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350 void CSdpClient::Error(TInt aError,TUint anOperationMask) |
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351 /** |
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352 Something's gone wrong. |
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353 |
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354 We get told whether it's just this operation or all that are |
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355 affected, but we'll just assume that all of them are bust for |
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356 now. |
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357 **/ |
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358 { |
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359 LOG2(_L("SDP: L2CAP socket error: %d, mask: 0x%x"), aError, anOperationMask); |
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360 if (!(anOperationMask & ~EErrorIoctl)) |
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361 return;//Ignore Ioctl errors. |
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362 if (anOperationMask & EErrorFatal) |
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363 ChannelUp(EFalse); |
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364 TDblQueIter<CSdpNetDbProvider> iter(iNetDbProviders); |
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365 CSdpNetDbProvider* netdb; |
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366 |
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367 while(iter) |
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368 { |
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369 netdb=iter++; |
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370 netdb->Error(aError); |
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371 } |
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372 |
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373 iRemoteAddr.Reset(); |
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374 CheckForIdle(0); |
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375 } |
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376 |
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377 void CSdpClient::Disconnect() |
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378 /** |
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379 We're no longer connected |
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380 **/ |
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381 { |
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382 LOG(_L("SDP bearer disconnected. Closing...")) |
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383 CanClose(); |
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384 } |
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385 |
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386 void CSdpClient::Disconnect(TDesC8& /*aDisconnectData*/) |
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387 { |
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388 Panic(ESdpDisconnectWithData); |
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389 } |
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390 |
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391 void CSdpClient::IoctlComplete(TDesC8* /*aBuf*/) |
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392 { |
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393 // This must be an internally generated ioctl |
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394 LOG(_L("SDP: Unexpected IoctlComplete upcall!")); |
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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 Internal functions |
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400 */ |
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401 |
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402 void CSdpClient::ParseNextPacket() |
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403 /** |
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404 Parse PDUs out of the L2CAP packet received. |
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405 This is actually a bit general, as we can have at most |
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406 one PDU per packet (SDP v1.1). |
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407 **/ |
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408 { |
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409 TPtr8 packet(iNextPacket->Des()); |
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410 TInt rem = packet.Length(); |
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411 TUint8* ptr = rem ? &packet[0] : 0; |
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412 while (rem >= KSdpPduHeaderSize) |
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413 { |
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414 TUint8 pduid = ptr[KSdpPduIdOffset]; |
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415 TUint16 transid = BigEndian::Get16(ptr+KSdpPduTransIdOffset); |
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416 TUint16 paramlen= BigEndian::Get16(ptr+KSdpPduParamLengthOffset); |
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417 if (rem < KSdpPduHeaderSize + paramlen) |
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418 break; |
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419 ptr += KSdpPduHeaderSize; |
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420 TPtrC8 params(ptr, paramlen); |
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421 HandlePDU(pduid, transid, params); |
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422 ptr += paramlen; |
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423 rem -= (KSdpPduHeaderSize+paramlen); |
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424 } |
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425 if (rem) |
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426 {//Partial pdu received. Bin it |
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427 LOG1(_L("SDP: Frame error: %d extra bytes received\n"), rem); |
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428 } |
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429 } |
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430 |
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431 void CSdpClient::HandlePDU(TUint8 aPduId, TUint16 aTransId, const TDesC8& aParams) |
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432 { |
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433 if(!RequestOutstanding()) |
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434 {// The server is spontaneously sending us data. DROP it |
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435 return; |
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436 } |
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437 |
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438 // There can only be one oustanding pdu, |
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439 // So the first pdu on the list must be the one. |
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440 __ASSERT_DEBUG(!iOutboundQ.IsEmpty(),Panic(ESdpNoRequestPdu)); |
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441 CSdpPdu* request = iOutboundQ.First(); |
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442 CSdpNetDbProvider* netdb = request->NetDbProvider(); |
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443 TUint16 reqTransId = request->TransId(); |
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444 |
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445 RequestOutstanding(EFalse); |
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446 // Request complete. So delete. (Removes from Q, so we can carry on sending). |
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447 delete request; |
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448 TryToSend(); |
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449 |
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450 if(!netdb) |
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451 return; |
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452 |
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453 if (reqTransId != aTransId) |
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454 {//DROP |
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455 LOG2(_L("SDP: Unexpected PDU; pdu id %d, transaction id: %d\n"), aPduId, aTransId); |
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456 netdb->Error(KErrSdpBadResultData); |
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457 return; |
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458 } |
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459 |
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460 switch (aPduId) |
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461 { |
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462 case EErrorResponse: |
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463 HandleErrorResponse(netdb, aParams); |
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464 break; |
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465 |
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466 case EServiceSearchResponse: |
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467 HandleServiceSearchResponse(netdb, aParams); |
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468 break; |
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469 |
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470 case EServiceAttributeResponse: |
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471 HandleServiceAttributeResponse(netdb, aParams); |
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472 break; |
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473 |
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474 default: |
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475 LOG1(_L("SDP: Unexpected PDU type; pdu id: %d\n"), aPduId); |
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476 netdb->Error(KErrSdpBadResultData); |
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477 }; |
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478 |
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479 } |
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480 |
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481 void CSdpClient::HandleErrorResponse(CSdpNetDbProvider* aNetDbProv, const TDesC8& aParams) |
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482 /** |
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483 We've got an error response. |
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484 |
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485 Parameter format is... |
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486 <pre> |
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487 Byte | 0 | 1 | 2 | 3 .... |
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488 | Error Code | Error info (dependent on code) |
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489 </pre> |
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490 **/ |
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491 { |
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492 const TInt KMinLength = 2; |
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493 const TInt KErrorCodeOffset = 0; |
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494 |
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495 TInt err = KErrGeneral; // The code to send up... |
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496 |
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497 if (aParams.Length() < KMinLength) |
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498 {// Way! Bad error response! drop it.. |
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499 err = KErrSdpPeerError; |
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500 } |
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501 else |
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502 { |
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503 TSdpErrorCodes code = (TSdpErrorCodes)BigEndian::Get16(&aParams[KErrorCodeOffset]); |
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504 switch (code) |
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505 { |
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506 case EInvalidSdpVersion: |
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507 err=KErrSdpUnsupportedVersion; |
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508 break; |
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509 case EInvalidServiceRecordHandle: |
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510 err=KErrSdpBadRecordHandle; |
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511 break; |
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512 case EInvalidContinuationState: |
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513 err=KErrSdpBadContinuationState; |
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514 break; |
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515 case EInvalidRequestSyntax: |
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516 case EInvalidPduSize: |
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517 default: |
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518 err=KErrSdpServerRejectedRequest; |
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519 } |
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520 } |
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521 |
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522 if (!aNetDbProv) |
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523 { |
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524 LOG1(_L("SDP: Error response with no owning aNetDbPr %d\nWill error them all!\n"), err); |
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525 Error(err, EErrorAllOperations); |
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526 return; |
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527 } |
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528 aNetDbProv->Error(err); |
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529 } |
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530 |
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531 void CSdpClient::HandleServiceSearchResponse(CSdpNetDbProvider* aNetDbProv, const TDesC8& aParams) |
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532 /** |
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533 Got service search response. |
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534 Pass it right on up to the net db. |
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535 **/ |
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536 { |
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537 if (!aNetDbProv) |
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538 { |
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539 LOG(_L("SDP: Service search response with no owning aNetDbPr\n")); |
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540 return; |
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541 } |
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542 aNetDbProv->QueryComplete(aParams); |
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543 } |
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544 |
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545 void CSdpClient::HandleServiceAttributeResponse(CSdpNetDbProvider* aNetDbProv, const TDesC8& aParams) |
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546 /** |
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547 We've got an attribute request response. |
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548 Pass the params up to the net db. It'll be dealt with client side! |
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549 |
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550 **/ |
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551 { |
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552 if (!aNetDbProv) |
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553 { |
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554 LOG(_L("SDP: Attribute response with no owning aNetDbPr\n")); |
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555 return; |
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556 } |
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557 aNetDbProv->QueryComplete(aParams); |
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558 } |
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559 |
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560 CSdpPdu* CSdpClient::NewPdu(CSdpNetDbProvider* aNetDb) |
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561 { |
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562 return new CSdpPdu(aNetDb); |
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563 } |
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564 |
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565 TUint16 CSdpClient::NextTransId() |
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566 { |
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567 return ++iTransId ? iTransId : ++iTransId; |
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568 } |
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569 |
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570 void CSdpClient::EnqueOutboundPdu(CSdpPdu& aPdu) |
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571 { |
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572 iOutboundQ.AddLast(aPdu); |
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573 TryToSend(); |
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574 } |
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575 |
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576 void CSdpClient::TryToSend() |
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577 /** |
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578 Try to send out a pdu. |
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579 Can do this if we have something to send, L2CAP is not blocked, |
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580 and there is no outstanding request. |
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581 There are 3 different places TryToSend can be called, |
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582 corresponding to invalidation of these three guards. |
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583 |
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584 Pdu tries to emit for is one. It can make this if we will have something to emit, L2CAP is |
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585 not obstructed, and it does not have no prominent order. It has 3 different places that |
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586 TryToSend can be called, corresponding to invalidation of these three holds. |
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587 **/ |
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588 { |
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589 if (RequestOutstanding()) |
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590 return; |
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591 if (iOutboundQ.IsEmpty()) |
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592 return; |
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593 if (L2CAPBlocked()) |
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594 return; |
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595 |
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596 // To pipeline, we should iterate here, until no more can fit in the packet, |
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597 // then send packet. Should really mark the pdus as sent too. |
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598 CSdpPdu& pdu = *iOutboundQ.First(); |
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599 // We just try to write, regardless of MTU! If it doesn't fit, we'll |
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600 // get back an error from remtoe. But our requests generally should fit. |
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601 if (!iBoundSAP->Write(pdu.Data(), 0)) |
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602 { |
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603 L2CAPBlocked(ETrue); |
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604 return; |
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605 } |
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606 // PDU will be dequed when it's response returns. |
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607 // This is easy to do, as we're not pipelining requests in L2CAP packets, |
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608 // so at most only one pdu can be outstanding at once. |
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609 RequestOutstanding(ETrue); |
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610 } |
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611 |
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612 void CSdpClient::CheckForIdle(TInt aTimeoutInSeconds) |
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613 { |
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614 CancelIdleTimer(); |
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615 iIdleQueued = ETrue; |
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616 // Add 10 to allow aTimeInSeconds to be 0. |
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617 BTSocketTimer::Queue((aTimeoutInSeconds*1000000)+10, iIdleTimerEntry); |
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618 } |
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619 |
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620 void CSdpClient::CancelIdleTimer() |
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621 { |
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622 if (iIdleQueued) |
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623 { |
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624 BTSocketTimer::Remove(iIdleTimerEntry); |
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625 iIdleQueued = EFalse; |
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626 } |
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627 } |
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628 |
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629 TInt CSdpClient::IdleTimerExpired(TAny* aPtr) |
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630 /** |
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631 Static function called whenever idle timer expires. |
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632 Take us down. Gracefully, mind! |
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633 **/ |
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634 { |
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635 CSdpClient* self = static_cast<CSdpClient*>(aPtr); |
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636 __ASSERT_DEBUG(self->iIdleQueued, Panic(ESdpClientBadIdleState)); |
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637 self->iIdleQueued = EFalse; |
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638 if (self->ChannelUp()) |
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639 {// Take it down, first. |
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640 // Clear remote address, so we don't accept further netdbs. |
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641 self->iRemoteAddr.Reset(); |
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642 self->ChannelUp(EFalse); |
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643 self->iBoundSAP->Shutdown(CServProviderBase::ENormal); |
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644 self->CheckForIdle(KSDPIdleTimeout*2); |
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645 } |
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646 else |
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647 {// Channels down. Say good bye! |
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648 self->iProtocol.ClientDown(*self); // Who'll promtly delete 'self' |
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649 } |
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650 return FALSE; |
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651 } |
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652 |