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1 // Copyright (c) 2005-2009 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 /** |
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17 @file |
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18 @internalComponent |
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19 */ |
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20 |
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21 #include <bluetooth/logger.h> |
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22 #include <bluetoothav.h> |
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23 #include <es_mbuf.h> |
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24 |
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25 #include "avctpPacketMgr.h" |
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26 #include "Avctp.h" |
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27 #include "avctpmuxer.h" |
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28 #include "avctpconstants.h" |
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29 |
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30 #ifdef __FLOG_ACTIVE |
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31 _LIT8(KLogComponent, LOG_COMPONENT_AVCTP); |
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32 #endif |
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33 |
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34 #ifdef _DEBUG |
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35 PANICCATEGORY("pktmgr"); |
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36 #endif |
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37 |
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38 using namespace SymbianAvctp; |
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39 |
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40 /** |
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41 Static factory function for an AVCTP Packet Manager |
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42 |
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43 @internalComponent |
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44 @leave KErrNoMemory if the new packet could not be allocated |
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45 @return A pointer to an AVCTP Packet Manager |
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46 */ |
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47 CAvctpPacketMgr* CAvctpPacketMgr::NewL(CAvctpTransport& aMuxer, |
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48 CAvctpProtocol& aProtocol) |
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49 { |
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50 LOG_STATIC_FUNC |
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51 CAvctpPacketMgr* mgr = new(ELeave) CAvctpPacketMgr(aMuxer, aProtocol); |
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52 CleanupStack::PushL(mgr); |
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53 mgr->ConstructL(); |
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54 CleanupStack::Pop(mgr); |
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55 return mgr; |
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56 } |
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57 |
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58 void CAvctpPacketMgr::ConstructL() |
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59 { |
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60 LOG_FUNC |
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61 iIncomingAssemblers[KAvctpPrimaryChannel] = CIncomingSduAssembler::NewL(*this,0); |
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62 iOutgoingFragmenters[KAvctpPrimaryChannel] = COutgoingSduFragmenter::NewL(*this,0); |
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63 iIncomingAssemblers[KAvctpSecondaryChannel] = CIncomingSduAssembler::NewL(*this,1); |
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64 iOutgoingFragmenters[KAvctpSecondaryChannel] = COutgoingSduFragmenter::NewL(*this,1); |
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65 } |
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66 |
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67 /** |
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68 Default constructor for an AVCTP Packet Manager |
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69 |
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70 @internalComponent |
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71 */ |
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72 CAvctpPacketMgr::CAvctpPacketMgr(CAvctpTransport& aTransport, CAvctpProtocol& aProtocol) |
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73 : iTransport(aTransport), |
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74 iProtocol(aProtocol) |
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75 { |
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76 LOG_FUNC |
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77 } |
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78 |
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79 /** |
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80 Default destructor for an AVCTP Packet Manager |
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81 |
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82 @internalComponent |
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83 */ |
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84 CAvctpPacketMgr::~CAvctpPacketMgr() |
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85 { |
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86 LOG_FUNC |
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87 |
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88 delete iIncomingAssemblers[0]; |
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89 delete iOutgoingFragmenters[0]; |
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90 delete iIncomingAssemblers[1]; |
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91 delete iOutgoingFragmenters[1]; |
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92 } |
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93 |
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94 /** |
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95 Transfers ownership of the aOutgoingSdu to CAvctpPacketMgr if the write succeeded |
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96 i.e. didn't return 0 |
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97 |
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98 Note this function should not be used by other classes to send IPID responses. |
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99 Use WriteIpid for this instead. |
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100 */ |
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101 void CAvctpPacketMgr::Write(HAvctpOutgoingSdu*& aOutgoingSdu, TInt aChannel) |
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102 { |
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103 LOG_FUNC |
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104 |
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105 iOutgoingFragmenters[aChannel]->Write(aOutgoingSdu); |
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106 } |
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107 |
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108 /** |
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109 This functions |
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110 |
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111 Transfers ownership of the aOutgoingSdu to CAvctpPacketMgr if the write succeeded |
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112 i.e. didn't return 0 |
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113 |
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114 Note this function should only be used to send IPID responses. Use Write for all other |
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115 Sdus instead. |
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116 */ |
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117 TInt CAvctpPacketMgr::WriteIpid(HAvctpOutgoingSdu*& aOutgoingSdu) |
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118 { |
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119 LOG_FUNC |
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120 |
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121 Write(aOutgoingSdu, aOutgoingSdu->Channel()); |
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122 |
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123 TInt ret = KErrNone; |
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124 if (!aOutgoingSdu) |
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125 { |
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126 ++iIpidSdusSent; |
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127 LOG1(_L("Sent %d IPID responses"), iIpidSdusSent); |
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128 if (iIpidSdusSent >= KMaximumIpidResponsesAllowed) |
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129 { |
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130 ret = KErrRemoteSentTooManyIpidSdus; |
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131 } |
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132 } |
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133 else |
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134 { |
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135 ret = KErrMuxerBlocked; // if the sdu is not null means it hasn't been sent. |
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136 } |
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137 return ret; |
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138 } |
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139 |
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140 /** |
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141 This is the lower protocol notifying us it can now send more data |
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142 We check to see if we were in the middle of sending fragments and |
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143 if so we write all those we can. |
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144 @return EFalse if we've blocked the muxer o/w EFalse |
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145 */ |
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146 void CAvctpPacketMgr::CanSend(TInt aChannel) |
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147 { |
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148 LOG_FUNC |
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149 |
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150 iOutgoingFragmenters[aChannel]->CanSend(); |
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151 } |
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152 |
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153 /** |
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154 We don't pass on the send / recv errors to the saps |
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155 because these errors only concern the packets we've |
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156 tried to send over L2CAP. |
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157 |
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158 We don't do anything on fatal errors cause the muxer |
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159 goes down in that situation and takes the packet mgr |
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160 with it. |
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161 */ |
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162 void CAvctpPacketMgr::SignalMuxerError(TInt /*aError*/,TUint aOperationMask) |
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163 { |
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164 LOG_FUNC |
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165 |
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166 if (aOperationMask & (MSocketNotify::EErrorSend)) |
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167 { |
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168 iIncomingAssemblers[KAvctpPrimaryChannel]->Reset(); |
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169 iIncomingAssemblers[KAvctpSecondaryChannel]->Reset(); |
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170 } |
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171 |
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172 if (aOperationMask & (MSocketNotify::EErrorRecv)) |
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173 { |
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174 iOutgoingFragmenters[KAvctpPrimaryChannel]->Reset(); |
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175 iOutgoingFragmenters[KAvctpSecondaryChannel]->Reset(); |
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176 } |
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177 } |
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178 |
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179 /** |
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180 This function transfers the ownership of aIncomingPdu from the |
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181 muxer to CAvctpPacketMgr |
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182 */ |
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183 TInt CAvctpPacketMgr::NewData(RMBufChain& aIncomingPdu, TInt aChannel) |
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184 { |
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185 LOG_FUNC |
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186 |
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187 TAvctpStartHeaderInfo headerInfo; |
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188 TInt err = CAvctpPacket::ParseHeader(aIncomingPdu, headerInfo); |
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189 if (err == KErrNone) |
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190 { |
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191 TRAP(err, iIncomingAssemblers[aChannel]->AddDataL(headerInfo, aIncomingPdu)); // transfers ownership of aIncomingPdu on success |
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192 if (err != KErrNone) |
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193 { |
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194 // We've OOM'd so drop packet |
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195 aIncomingPdu.Free(); |
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196 |
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197 // Don't reset iIncomingAssembler since it'll reset itself on |
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198 // the next start or normal packet if we missed a vital fragment here |
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199 } |
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200 |
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201 err=KErrNone; //Want to read remaining packets, so don't pass an error back up. |
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202 } |
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203 else |
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204 { |
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205 // There was something wrong with the PDU so punish the remote |
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206 Transport().Shutdown(err); |
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207 aIncomingPdu.Free(); |
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208 err = KErrMuxerShutDown; |
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209 } |
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210 |
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211 return err; |
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212 } |
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213 |
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214 TBool CAvctpPacketMgr::WouldLikeToSend() |
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215 { |
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216 return iOutgoingFragmenters[KAvctpPrimaryChannel]->HasData() || iOutgoingFragmenters[KAvctpSecondaryChannel]->HasData(); |
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217 } |
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218 |
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219 // |
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220 // |
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221 // implementation of COutgoingSduFragmenter |
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222 // |
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223 // |
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224 |
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225 /** |
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226 Default constructor for an outgoing partial AVCTP Sdu |
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227 @internalComponent |
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228 */ |
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229 COutgoingSduFragmenter::COutgoingSduFragmenter(CAvctpPacketMgr& aMgr, TInt aChannel) |
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230 : iMgr(aMgr), iChannel(aChannel) |
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231 { |
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232 LOG_FUNC |
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233 |
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234 } |
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235 |
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236 /** |
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237 Static factory function |
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238 |
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239 @internalComponent |
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240 @leave KErrNoMemory if the new packet could not be allocated |
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241 @return A pointer to an outgoing partial AVCTP Sdu |
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242 */ |
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243 COutgoingSduFragmenter* COutgoingSduFragmenter::NewL(CAvctpPacketMgr& aMgr, TInt aChannel) |
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244 { |
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245 LOG_STATIC_FUNC |
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246 |
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247 COutgoingSduFragmenter* packet = new(ELeave) COutgoingSduFragmenter(aMgr, aChannel); |
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248 CleanupStack::PushL(packet); |
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249 packet->ConstructL(); |
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250 CleanupStack::Pop(packet); |
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251 return packet; |
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252 } |
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253 |
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254 void COutgoingSduFragmenter::ConstructL() |
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255 { |
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256 LOG_FUNC |
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257 |
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258 TCallBack cb(SendAsyncCallBack, this); |
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259 iSendAsyncCallBack = new(ELeave) CAsyncCallBack(cb, EActiveHighPriority); |
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260 } |
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261 |
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262 COutgoingSduFragmenter::~COutgoingSduFragmenter() |
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263 { |
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264 LOG_FUNC |
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265 |
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266 delete iSendAsyncCallBack; |
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267 } |
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268 |
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269 void COutgoingSduFragmenter::Reset() |
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270 { |
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271 LOG_FUNC |
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272 |
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273 iSduData.Free(); |
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274 iCurrentWriteState = ENormal; |
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275 // we don't have anymore data to send, so check for idle so that if the transport is idle, the |
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276 // timer will be set and when expires it will be destroyed. |
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277 iMgr.Transport().CheckForIdle(); |
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278 } |
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279 |
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280 TBool COutgoingSduFragmenter::HasData() |
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281 { |
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282 return iSduData.Length() > 0; |
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283 } |
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284 |
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285 /** |
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286 If we can take ownership of this we do, and kick off async send. Otherwise |
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287 we do nothing and the SDU remains on the caller's queue. |
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288 */ |
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289 void COutgoingSduFragmenter::Write(HAvctpOutgoingSdu*& aOutgoingSdu) |
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290 { |
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291 LOG_FUNC |
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292 |
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293 if (iSduData.Length() == 0) |
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294 { |
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295 iSduData.Assign(aOutgoingSdu->Data()); |
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296 iAddr = aOutgoingSdu->BTAddr(); |
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297 iHeaderInfo = aOutgoingSdu->HeaderInfo(); |
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298 |
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299 delete aOutgoingSdu; |
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300 aOutgoingSdu = NULL; |
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301 |
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302 StartSendAsyncCallBack(); |
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303 } |
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304 } |
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305 |
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306 TInt COutgoingSduFragmenter::CountFragments(const RMBufChain& aSdu, TInt iMtuUsedToFragment) const |
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307 { |
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308 TUint totalFragmentsNeeded = 1; |
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309 if (aSdu.Length() + ENormalHeaderLength > iMtuUsedToFragment) |
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310 { |
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311 TInt dataRemaining = aSdu.Length() + EStartFragHeaderLength |
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312 - iMtuUsedToFragment; |
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313 while (dataRemaining > 0) |
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314 { |
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315 totalFragmentsNeeded++; |
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316 dataRemaining -= (iMtuUsedToFragment - EOtherFragHeaderLength); |
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317 } |
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318 } |
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319 return totalFragmentsNeeded; |
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320 } |
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321 |
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322 void COutgoingSduFragmenter::DoSendCurrentSDU() |
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323 { |
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324 // we should have one fragmenter allowed to write to a given remote at any time |
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325 // once the fragmenter has done its job then we can ask the SAPs to drain an SDU into the fragger |
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326 TInt mtu = iMgr.Transport().GetCurrentOutboundMtu(iChannel); |
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327 |
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328 // If we couldn't retrieve the MTU we aren't in a state where we can send. |
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329 // Once we are send should be kicked off by mux calling CanSend(). |
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330 if(mtu > 0) |
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331 { |
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332 switch(iCurrentWriteState) |
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333 { |
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334 case ENormal: |
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335 { |
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336 BeginSendingSdu(mtu); |
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337 break; |
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338 } |
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339 case EFragmenting: |
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340 { |
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341 ContinueSendingSdu(mtu); |
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342 break; |
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343 } |
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344 default: |
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345 __ASSERT_DEBUG(EFalse, Panic(EAvctpInvalidFragmenterState)); |
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346 }; |
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347 } |
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348 } |
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349 |
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350 void COutgoingSduFragmenter::BeginSendingSdu(TInt aMtu) |
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351 { |
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352 LOG_FUNC |
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353 |
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354 __ASSERT_DEBUG(iCurrentWriteState == COutgoingSduFragmenter::ENormal, Panic(EAvctpInvalidFragmenterState)); |
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355 |
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356 RMBufChain pdu; |
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357 TInt numberFragments = 1; |
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358 |
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359 if (aMtu >= iSduData.Length() + ENormalHeaderLength) |
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360 { |
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361 pdu.Assign(iSduData); |
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362 } |
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363 else |
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364 { |
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365 numberFragments = CountFragments(iSduData, aMtu); |
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366 pdu.Assign(iSduData); |
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367 |
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368 __DEBUG_ONLY(TInt err =) pdu.Split(aMtu - EStartFragHeaderLength, iSduData); |
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369 __ASSERT_DEBUG(err==KErrNone, Panic(EAvctpRMBufChainSplitError)); |
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370 } |
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371 |
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372 iHeaderInfo.iPktType = (iSduData.Length()) ? EStartFrag : ENormalPkt; |
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373 |
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374 if (AddHeader(pdu, numberFragments) == KErrNone) |
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375 { |
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376 if (iMgr.Transport().DoWrite(pdu,iChannel)) |
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377 { |
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378 if(iSduData.Length() == 0) |
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379 { |
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380 Reset(); |
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381 } |
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382 else |
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383 { |
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384 iCurrentWriteState = COutgoingSduFragmenter::EFragmenting; |
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385 } |
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386 |
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387 CheckForCanSend(); |
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388 } |
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389 else |
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390 { |
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391 pdu.Remove(); // remove the first RMBuf (that is the header) |
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392 iSduData.Prepend(pdu); // put back the pdu in the iSduData |
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393 } |
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394 } |
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395 else |
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396 { |
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397 LOG(_L("Error creating the header because KErrNoMemory")); |
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398 __ASSERT_DEBUG(!pdu.IsEmpty(), Panic(EAvctpFragmenterEmptyPdu)); |
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399 pdu.Free(); |
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400 Reset(); |
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401 } |
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402 __ASSERT_DEBUG(pdu.IsEmpty(), Panic(EAvctpFragmenterNonEmptyPdu)); |
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403 } |
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404 |
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405 void COutgoingSduFragmenter::ContinueSendingSdu(TInt aMtu) |
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406 { |
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407 RMBufChain pdu; |
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408 // if the data payload plus the header fit in the mtu then we can send all the iSduData content |
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409 if (aMtu >= iSduData.Length() + EOtherFragHeaderLength) |
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410 { |
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411 pdu.Assign(iSduData); |
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412 } |
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413 // we need to split iSduData as it is bigger than the mtu |
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414 else |
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415 { |
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416 pdu.Assign(iSduData); |
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417 |
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418 __DEBUG_ONLY(TInt err =) pdu.Split(aMtu - EOtherFragHeaderLength, iSduData); |
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419 __ASSERT_DEBUG(err==KErrNone, Panic(EAvctpRMBufChainSplitError)); |
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420 } |
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421 |
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422 // pdu now containts either the whole remainend sdu data (first if branch) or a bit of it (second branch) |
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423 // and iSduData contains either nothing or the remained sdu payload. Based on its length we know the packet type |
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424 // we are going to send. |
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425 iHeaderInfo.iPktType = (iSduData.Length()) ? EContinueFrag : EEndFrag; |
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426 |
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427 if (AddHeader(pdu, 1) == KErrNone) |
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428 { |
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429 if (iMgr.Transport().DoWrite(pdu,iChannel)) |
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430 { |
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431 if(iSduData.Length() == 0) |
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432 { |
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433 Reset(); |
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434 } |
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435 |
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436 CheckForCanSend(); |
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437 } |
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438 else |
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439 { |
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440 pdu.Remove(); // remove the first RMBuf (that is the header) |
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441 iSduData.Prepend(pdu); // put back the pdu in the iSduData |
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442 } |
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443 } |
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444 else |
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445 { |
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446 LOG(_L("Error creating the header because KErrNoMemory")); |
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447 __ASSERT_DEBUG(!pdu.IsEmpty(), Panic(EAvctpFragmenterEmptyPdu)); |
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448 pdu.Free(); |
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449 Reset(); |
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450 } |
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451 __ASSERT_DEBUG(pdu.IsEmpty(), Panic(EAvctpFragmenterNonEmptyPdu)); |
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452 } |
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453 |
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454 TInt COutgoingSduFragmenter::AddHeader(RMBufChain& aPdu, TInt aNumFragments) |
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455 { |
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456 TInt headerLength = 0; |
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457 switch(iHeaderInfo.iPktType) |
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458 { |
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459 case ENormalPkt: |
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460 headerLength = ENormalHeaderLength; |
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461 break; |
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462 case EStartFrag: |
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463 headerLength = EStartFragHeaderLength; |
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464 break; |
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465 case EContinueFrag: |
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466 case EEndFrag: |
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467 headerLength = EOtherFragHeaderLength; |
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468 break; |
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469 default: |
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470 __ASSERT_DEBUG(EFalse, Panic(EAvctpFragmenterInvalidHeaderType)); |
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471 } |
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472 |
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473 RMBuf* header = RMBuf::Alloc(headerLength); |
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474 if (header) |
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475 { |
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476 TUint8& avctpHeaderByte = *(header->Ptr()); |
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477 avctpHeaderByte = 0; |
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478 |
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479 // Check the transaction label is valid |
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480 AssertValidTransactionLabel(iHeaderInfo.iTransactionLabel); |
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481 |
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482 avctpHeaderByte |= iHeaderInfo.iTransactionLabel << KTransactionLabelShift; |
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483 avctpHeaderByte |= iHeaderInfo.iPktType << KPacketTypeShift; |
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484 |
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485 if (iHeaderInfo.iMsgType == SymbianAvctp::EResponse) |
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486 { |
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487 avctpHeaderByte |= KResponseMsgBit; |
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488 } |
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489 |
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490 if(iHeaderInfo.iPktType == ENormalPkt) |
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491 { |
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492 BigEndian::Put16(header->Ptr()+KNormalHeaderPidOffset,iHeaderInfo.iPid); |
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493 } |
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494 else if(iHeaderInfo.iPktType == EStartFrag) |
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495 { |
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496 *(header->Ptr() + KNumFragmentsOffset) = aNumFragments; |
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497 BigEndian::Put16(header->Ptr()+KStartHeaderPidOffset,iHeaderInfo.iPid); |
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498 } |
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499 |
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500 if (!iHeaderInfo.iHasValidPid) |
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501 { |
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502 avctpHeaderByte |= KIsValidPidMask; |
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503 } |
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504 |
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505 aPdu.Prepend(header); |
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506 } |
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507 |
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508 return header ? KErrNone : KErrNoMemory; |
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509 } |
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510 |
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511 void COutgoingSduFragmenter::CanSend() |
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512 { |
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513 LOG_FUNC |
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514 |
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515 // If we have Sdu left to send this will kick off an async send, else |
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516 // it will signal to SAPs that we are ready to receive more data |
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517 CheckForCanSend(); |
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518 } |
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519 |
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520 /*static*/ TInt COutgoingSduFragmenter::SendAsyncCallBack(TAny* aFragmenter) |
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521 { |
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522 static_cast<COutgoingSduFragmenter*>(aFragmenter)->DoSendCurrentSDU(); |
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523 return KErrNone; |
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524 } |
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525 |
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526 |
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527 void COutgoingSduFragmenter::StartSendAsyncCallBack() |
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528 { |
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529 iSendAsyncCallBack->CallBack(); |
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530 } |
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531 |
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532 void COutgoingSduFragmenter::CancelSendAsyncCallBack() |
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533 { |
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534 iSendAsyncCallBack->Cancel(); |
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535 } |
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536 |
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537 void COutgoingSduFragmenter::CheckForCanSend() |
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538 { |
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539 LOG_FUNC |
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540 |
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541 if (iSduData.Length()) |
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542 { |
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543 StartSendAsyncCallBack(); |
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544 } |
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545 else |
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546 { |
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547 // Only signal CanSend to the saps if we haven't got any |
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548 // fragments left to send |
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549 iMgr.Protocol().SignalCanSendToSaps(iMgr); |
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550 } |
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551 } |
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552 |
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553 // |
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554 // |
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555 // implementation of CIncomingSduAssembler |
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556 // |
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557 // |
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558 |
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559 /** |
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560 Default constructor for an incoming partial AVCTP Sdu |
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561 |
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562 @internalComponent |
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563 */ |
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564 CIncomingSduAssembler::CIncomingSduAssembler(CAvctpPacketMgr& aMgr, TInt aChannel) |
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565 : iMgr(aMgr), iChannel(aChannel) |
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566 { |
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567 LOG_FUNC |
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568 } |
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569 |
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570 /** |
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571 Static factory function |
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572 |
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573 @internalComponent |
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574 @leave KErrNoMemory if the new packet could not be allocated |
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575 @return A pointer to an incoming partial AVCTP Sdu |
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576 */ |
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577 CIncomingSduAssembler* CIncomingSduAssembler::NewL(CAvctpPacketMgr& aMgr, TInt aChannel) |
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578 { |
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579 LOG_STATIC_FUNC |
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580 |
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581 CIncomingSduAssembler* assembler = new(ELeave) CIncomingSduAssembler(aMgr, aChannel); |
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582 CleanupStack::PushL(assembler); |
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583 assembler->ConstructL(); |
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584 CleanupStack::Pop(assembler); |
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585 return assembler; |
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586 } |
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587 |
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588 void CIncomingSduAssembler::ConstructL() |
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589 { |
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590 LOG_FUNC |
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591 |
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592 // chain member just takes ownership of stuff from l2cap |
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593 } |
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594 |
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595 CIncomingSduAssembler::~CIncomingSduAssembler() |
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596 { |
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597 LOG_FUNC |
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598 |
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599 iAccretingSdu.Free(); |
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600 } |
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601 |
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602 void CIncomingSduAssembler::Reset() |
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603 { |
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604 LOG_FUNC |
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605 |
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606 iStartHeaderInfo = *new (&iStartHeaderInfo) TAvctpStartHeaderInfo; |
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607 iFragmentsReceived = 0; |
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608 iContinueFragmentSize = 0; |
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609 iAccretingSdu.Free(); |
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610 } |
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611 |
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612 /** |
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613 This function transfers the ownership of aIncomingPdu to CIncomingSduAssembler. |
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614 aIncomingPdu will represent a valid PDU as described by TAvctpStartHeaderInfo |
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615 */ |
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616 void CIncomingSduAssembler::AddDataL(TAvctpStartHeaderInfo& aHeaderInfo, |
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617 RMBufChain& aIncomingPdu) |
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618 { |
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619 LOG_FUNC |
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620 |
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621 switch (aHeaderInfo.iPktType) |
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622 { |
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623 case ENormalPkt: |
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624 ProcessNormalPduL(aIncomingPdu); |
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625 break; |
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626 case EStartFrag: |
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627 ProcessStartPdu(aHeaderInfo, aIncomingPdu); |
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628 break; |
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629 |
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630 case EContinueFrag: |
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631 ProcessContinuePdu(aHeaderInfo, aIncomingPdu); |
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632 break; |
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633 |
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634 case EEndFrag: |
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635 ProcessEndPduL(aHeaderInfo, aIncomingPdu); |
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636 break; |
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637 |
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638 default: |
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639 Panic(EUnknownPacketType); |
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640 } |
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641 } |
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642 /** |
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643 Because fragments in the same SDU can't be interleaved, this functions throws away any existing |
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644 partial SDU |
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645 */ |
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646 void CIncomingSduAssembler::ProcessNormalPduL(RMBufChain& aIncomingPdu) |
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647 { |
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648 LOG_FUNC |
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649 |
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650 HAvctpIncomingSdu* sdu = new (ELeave) HAvctpIncomingSdu(iMgr.DevAddr(), aIncomingPdu); |
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651 |
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652 iMgr.Protocol().SignalNewDataToSaps(sdu, iChannel); // transfers ownership of iAccretingSdu data via the HAvctpIncomingSdu |
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653 Reset(); |
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654 } |
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655 |
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656 /** |
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657 Because fragments in the same SDU can't be interleaved, this functions throws away any existing |
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658 partial SDU |
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659 */ |
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660 void CIncomingSduAssembler::ProcessStartPdu(TAvctpStartHeaderInfo& aHeaderInfo, RMBufChain& aIncomingPdu) |
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661 { |
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662 LOG_FUNC |
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663 |
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664 iStartHeaderInfo.iPktType = EStartFrag; //Not sure we want to bother updating this during aggregation |
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665 iStartHeaderInfo.iFragmentsInSdu = aHeaderInfo.iFragmentsInSdu; |
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666 iStartHeaderInfo.iTransactionLabel = aHeaderInfo.iTransactionLabel; |
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667 iStartHeaderInfo.iMsgType = aHeaderInfo.iMsgType; |
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668 iFragmentsReceived = 1; |
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669 iContinueFragmentSize = aIncomingPdu.Length(); |
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670 |
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671 // All packets we pass up to AVCTPServices have the same header format. |
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672 // Because fragmentation happens transparently to the client side we |
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673 // present all packets with a normal header. |
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674 TUint8 headerByte = *(aIncomingPdu.First()->Ptr()); |
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675 aIncomingPdu.TrimStart(1); |
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676 *(aIncomingPdu.First()->Ptr()) = headerByte & KAvctpNormalHeaderMask; |
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677 |
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678 iAccretingSdu.Free(); |
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679 iAccretingSdu.Assign(aIncomingPdu); |
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680 } |
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681 |
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682 void CIncomingSduAssembler::ProcessContinuePdu(const TAvctpStartHeaderInfo& aHeaderInfo, |
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683 RMBufChain& aIncomingPdu) |
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684 { |
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685 LOG_FUNC |
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686 if (iAccretingSdu.Length() && |
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687 iStartHeaderInfo.iTransactionLabel == aHeaderInfo.iTransactionLabel) |
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688 { |
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689 // the end packet matches by label - good! |
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690 if (iFragmentsReceived < iStartHeaderInfo.iFragmentsInSdu -1 && // not <= since we expect a End Fragment at least after a Continue |
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691 iStartHeaderInfo.iMsgType == aHeaderInfo.iMsgType && |
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692 aIncomingPdu.Length() <= iContinueFragmentSize) |
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693 { |
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694 iFragmentsReceived++; |
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695 aIncomingPdu.TrimStart(EOtherFragHeaderLength); |
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696 iAccretingSdu.Append(aIncomingPdu); |
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697 } |
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698 else if (iFragmentsReceived >= iStartHeaderInfo.iFragmentsInSdu - 1 || // - 1 cause we've not counted this packet yet |
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699 aIncomingPdu.Length() != iContinueFragmentSize || |
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700 iStartHeaderInfo.iMsgType != aHeaderInfo.iMsgType) |
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701 |
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702 { |
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703 iMgr.Transport().Shutdown(KErrMalformedPacketFromRemote); |
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704 Reset(); |
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705 } |
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706 else |
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707 { |
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708 // else the PDU is out of place but not actually incorrect so just allow it to drop |
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709 aIncomingPdu.Free(); |
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710 } |
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711 } |
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712 else |
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713 { |
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714 // else the PDU is not on our current transaction label so just allow it to drop |
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715 aIncomingPdu.Free(); |
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716 } |
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717 } |
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718 |
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719 void CIncomingSduAssembler::ProcessEndPduL(const TAvctpStartHeaderInfo& aHeaderInfo, |
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720 RMBufChain& aIncomingPdu) |
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721 { |
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722 LOG_FUNC |
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723 |
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724 if (iAccretingSdu.Length() && |
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725 iStartHeaderInfo.iTransactionLabel == aHeaderInfo.iTransactionLabel) |
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726 { |
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727 // the end packet matches by label - good! |
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728 if (iFragmentsReceived == iStartHeaderInfo.iFragmentsInSdu - 1 && // - 1 cause we've not counted this packet yet |
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729 iStartHeaderInfo.iMsgType == aHeaderInfo.iMsgType && |
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730 aIncomingPdu.Length() <= iContinueFragmentSize) |
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731 |
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732 { |
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733 iFragmentsReceived++; |
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734 aIncomingPdu.TrimStart(EOtherFragHeaderLength); |
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735 iAccretingSdu.Append(aIncomingPdu); |
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736 |
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737 // This is only new'd on the heap so we can safely pass it along. |
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738 HAvctpIncomingSdu* completeSdu = new (ELeave) HAvctpIncomingSdu(iMgr.DevAddr(), iAccretingSdu); |
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739 |
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740 iMgr.Protocol().SignalNewDataToSaps(completeSdu, iChannel); // transfers ownership of iAccretingSdu data via the HAvctpIncomingSdu |
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741 Reset(); |
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742 } |
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743 else if (aIncomingPdu.Length() > iContinueFragmentSize || |
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744 iStartHeaderInfo.iMsgType != aHeaderInfo.iMsgType) |
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745 { |
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746 iMgr.Transport().Shutdown(KErrMalformedPacketFromRemote); |
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747 Reset(); |
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748 } |
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749 else |
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750 { |
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751 // else the PDU is out of place but not actually incorrect so just allow it to drop |
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752 iAccretingSdu.Free(); |
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753 } |
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754 } |
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755 else |
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756 { |
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757 // else the PDU is not on our current transaction label so just allow it to drop |
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758 iAccretingSdu.Free(); |
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759 } |
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760 } |