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1 /* |
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2 * Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Implements sender class for target |
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15 * |
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16 */ |
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17 |
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18 /* |
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19 * %version: 15 % |
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20 */ |
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21 |
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22 #include "am_debug.h" |
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23 #include "sender_hw.h" |
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24 #include "WlanProto.h" |
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25 #include "carddrv.h" |
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26 |
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27 // Protocol blocks sending if it receives a return <= 0 |
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28 // This value should be propogated up through the stack |
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29 const TInt KStopSending = 0; |
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30 const TInt KContinueSending = 1; |
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31 |
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32 // ============================ MEMBER FUNCTIONS =============================== |
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33 |
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34 // --------------------------------------------------------- |
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35 // CSender::Send() |
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36 // --------------------------------------------------------- |
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37 // |
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38 TInt CSender::Send( RMBufChain& aPacket ) |
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39 { |
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40 |
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41 TInt ret( KContinueSending ); |
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42 |
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43 TDataBuffer* txDataBuffer = iParent->iCard.AllocTxBuffer( |
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44 aPacket.Length() |
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45 // size of the packet's UP value |
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46 - 1 ); |
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47 |
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48 if ( txDataBuffer ) |
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49 { |
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50 //First buffer contains UP value |
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51 RMBuf* rmbuf = aPacket.First(); |
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52 TInt num = aPacket.NumBufs(); |
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53 |
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54 TUint8 UPValue = rmbuf->Get(); |
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55 |
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56 txDataBuffer->SetUserPriority( UPValue ); |
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57 |
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58 //Frame starts from second buffer |
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59 rmbuf = rmbuf->Next(); |
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60 num--; |
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61 |
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62 for( TInt i(0); i < num; i++ ) |
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63 { |
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64 txDataBuffer->AppendBuffer( rmbuf->Ptr(), rmbuf->Length() ); |
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65 |
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66 rmbuf = rmbuf->Next(); |
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67 } |
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68 |
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69 if ( !iParent->iCard.AddTxFrame( txDataBuffer ) ) |
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70 { |
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71 DEBUG("CSender::Send: AddTxPacket returned false => stop flow"); |
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72 ret = KStopSending; |
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73 iStopSending = ETrue; |
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74 RequestResumeTx(); |
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75 } |
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76 } |
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77 else |
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78 { |
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79 DEBUG("CSender::Send: Tx buf could't be allocated => stop flow"); |
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80 |
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81 // in this case the Tx packet could possibly be kept - if seen |
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82 // feasible - until ResumeTx completes and then re-submitted |
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83 |
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84 ret = KStopSending; |
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85 iStopSending = ETrue; |
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86 RequestResumeTx(); |
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87 } |
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88 |
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89 aPacket.Free(); |
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90 |
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91 return ret; |
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92 } |
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93 |
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94 // --------------------------------------------------------- |
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95 // CSender::RequestResumeTx() |
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96 // --------------------------------------------------------- |
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97 // |
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98 void CSender::RequestResumeTx() |
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99 { |
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100 if ( !iReqPending ) |
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101 { |
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102 DEBUG("CSender::RequestResumeTx()"); |
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103 |
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104 iReqPending = ETrue; |
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105 SetActive(); |
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106 iParent->iCard.ResumeTx( iStatus ); |
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107 } |
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108 } |
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109 |
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110 // --------------------------------------------------------- |
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111 // CSender::RunL() |
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112 // --------------------------------------------------------- |
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113 // |
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114 void CSender::RunL() |
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115 { |
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116 // Write completion from the LDD |
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117 DEBUG("CSender::RunL()"); |
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118 |
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119 iReqPending = EFalse; |
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120 |
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121 if (iStopSending) |
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122 { |
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123 DEBUG("CSender::RunL(): resume flow"); |
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124 iStopSending = EFalse; |
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125 iParent->iParent->ResumeSending(); |
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126 } |
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127 else |
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128 { |
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129 DEBUG("CSender::RunL(): flow hasn't been stopped"); |
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130 } |
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131 } |