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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 |
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22 /* |
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23 the incoming assembler owns a chain to try to preserve the idea to not allocate |
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24 the outgoing fragmenter owns the HOutboundSDU |
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25 |
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26 the inbound one could change, but it may be ok to only transfer the MBufChain into the HInboundSDU when we are happy that |
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27 we have something worth holding onto on a queue |
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28 */ |
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29 |
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30 #ifndef AVCTPPACKETMGR_H |
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31 #define AVCTPPACKETMGR_H |
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32 |
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33 #include "avctppacket.h" |
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34 |
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35 // Forward declarations |
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36 class CAvctpProtocol; |
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37 class CAvctpTransport; |
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38 class CPartialIncomingSdu; |
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39 class CPartialOutgoingSdu; |
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40 class HAvctpOutgoingSdu; |
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41 class RMBufChain; |
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42 class CAvctpPacketMgr; |
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43 |
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44 NONSHARABLE_CLASS(MAvctpSDUSender) |
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45 { |
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46 public: |
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47 virtual void Write(HAvctpOutgoingSdu*& aOutgoingSdu, TInt aChannel) =0; |
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48 virtual TInt WriteIpid(HAvctpOutgoingSdu*& aOutgoingSdu) =0; |
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49 virtual TBool IsClearToSend(TInt aChannel) const =0; |
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50 }; |
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51 |
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52 |
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53 /** |
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54 This class helps the Mgr collect together the incoming packet fragments from a muxer |
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55 */ |
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56 NONSHARABLE_CLASS(CIncomingSduAssembler) : public CBase |
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57 { |
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58 public: |
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59 static CIncomingSduAssembler* NewL(CAvctpPacketMgr& aMgr, TInt aChannel); |
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60 ~CIncomingSduAssembler(); |
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61 |
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62 void Reset(); |
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63 void AddDataL(TAvctpStartHeaderInfo& aHeaderInfo, RMBufChain& aIncomingPdu); |
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64 |
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65 private: |
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66 CIncomingSduAssembler(CAvctpPacketMgr& aMgr, TInt aChannel); |
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67 void ConstructL(); |
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68 |
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69 void ProcessNormalPduL(RMBufChain& aIncomingPdu); |
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70 void ProcessStartPdu(TAvctpStartHeaderInfo& aHeaderInfo, RMBufChain& aIncomingPdu); |
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71 void ProcessContinuePdu(const TAvctpStartHeaderInfo& aHeaderInfo, RMBufChain& aIncomingPdu); |
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72 void ProcessEndPduL(const TAvctpStartHeaderInfo& aHeaderInfo, RMBufChain& aIncomingPdu); |
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73 |
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74 private: |
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75 static const TInt KAvctpNormalHeaderMask = 0xf3; |
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76 |
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77 CAvctpPacketMgr& iMgr; |
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78 RMBufChain iAccretingSdu; |
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79 TUint iFragmentsReceived; |
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80 TAvctpStartHeaderInfo iStartHeaderInfo; |
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81 |
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82 /** The spec mandates that Start and Continue fragments have the same length & |
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83 that End fragments have a equal or smaller size. NB it doesn't say the size |
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84 has to equal the current MTU |
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85 */ |
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86 TUint iContinueFragmentSize; |
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87 TInt iChannel; |
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88 }; |
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89 |
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90 |
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91 /** |
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92 This class helps the Mgr fragment the outgoing Sdus from a sap |
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93 */ |
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94 NONSHARABLE_CLASS(COutgoingSduFragmenter) : public CBase |
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95 { |
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96 public: |
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97 enum TWriteState |
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98 { |
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99 ENormal, |
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100 EFragmenting, |
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101 }; |
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102 |
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103 public: |
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104 static COutgoingSduFragmenter* NewL(CAvctpPacketMgr& aMgr, TInt aChannel); |
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105 ~COutgoingSduFragmenter(); |
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106 |
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107 TBool HasData(); |
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108 void Write(HAvctpOutgoingSdu*& aOutgoingSdu); |
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109 void CanSend(); |
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110 void Reset(); |
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111 |
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112 private: |
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113 COutgoingSduFragmenter(CAvctpPacketMgr& aMgr, TInt aChannel); |
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114 void ConstructL(); |
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115 |
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116 TInt CountFragments(const RMBufChain& aSdu, TInt iMtuUsedToFragment) const; |
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117 void DoSendCurrentSDU(); |
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118 void BeginSendingSdu(TInt aMtu); |
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119 void ContinueSendingSdu(TInt aMtu); |
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120 |
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121 TInt AddHeader(RMBufChain& aPdu, TInt aNumFragments); |
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122 |
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123 // Callbacks |
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124 void StartSendAsyncCallBack(); |
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125 void CancelSendAsyncCallBack(); |
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126 static TInt SendAsyncCallBack(TAny* aFragmenter); |
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127 |
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128 void CheckForCanSend(); |
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129 |
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130 private: |
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131 CAvctpPacketMgr& iMgr; |
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132 |
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133 RMBufChain iSduData; |
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134 TAvctpNormalHeaderInfo iHeaderInfo; // FIXME rename |
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135 TBTDevAddr iAddr; |
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136 |
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137 TInt iChannel; |
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138 TWriteState iCurrentWriteState; |
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139 CAsyncCallBack* iSendAsyncCallBack; |
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140 }; |
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141 |
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142 |
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143 |
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144 NONSHARABLE_CLASS(CAvctpPacketMgr) : public CBase, |
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145 public MAvctpSDUSender |
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146 { |
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147 public: |
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148 ~CAvctpPacketMgr(); |
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149 static CAvctpPacketMgr* NewL(CAvctpTransport& aMuxer, CAvctpProtocol& aProtocol); |
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150 |
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151 // From above |
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152 virtual void Write(HAvctpOutgoingSdu*& aOutgoingSdu, TInt aChannel); |
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153 virtual TInt WriteIpid(HAvctpOutgoingSdu*& aOutgoingSdu); |
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154 |
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155 // From the transport |
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156 void CanSend(TInt aChannel); |
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157 void SignalMuxerError(TInt aError,TUint aOperationMask); |
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158 TInt NewData(RMBufChain& aIncomingPdu, TInt aChannel); |
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159 TBool WouldLikeToSend(); |
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160 |
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161 inline CAvctpTransport& Transport() const; |
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162 inline CAvctpProtocol& Protocol() const; |
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163 inline TBool IsClearToSend(TInt aChannel) const; |
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164 inline const TBTDevAddr& DevAddr() const; |
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165 |
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166 private: |
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167 CAvctpPacketMgr(CAvctpTransport& aMuxer, CAvctpProtocol& aProtocol); |
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168 void ConstructL(); |
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169 |
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170 private: |
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171 CAvctpTransport& iTransport; |
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172 CAvctpProtocol& iProtocol; |
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173 |
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174 TFixedArray<CIncomingSduAssembler*,2> iIncomingAssemblers; |
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175 TFixedArray<COutgoingSduFragmenter*,2> iOutgoingFragmenters; |
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176 |
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177 TUint iIpidSdusSent; |
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178 }; |
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179 |
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180 #include "avctppacketmgr.inl" |
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181 |
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182 #endif // AVCTPPACKETMGR_H |
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183 |