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1 // Copyright (c) 2003-2009 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 // Implements the Message sender that just |
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15 // resends messages until max retry or max count has been reached |
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16 // max retry and max count are constants |
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17 // |
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18 // |
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19 |
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20 /** |
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21 @file MsgSender.cpp |
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22 @internalTechnology |
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23 */ |
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24 |
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25 #include "DHCP_Std.h" |
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26 #include "DHCPServer.h" |
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27 #include "MsgSender.h" |
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28 #include <in_sock.h> |
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29 #include <es_sock.h> |
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30 #include "DHCPAuthentication.h" |
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31 #include "DHCPIP4StateMachine.h" |
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32 CMessageSender::~CMessageSender() |
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33 /** |
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34 * Destructor for message sender |
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35 * |
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36 * @internalTechnology |
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37 */ |
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38 { |
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39 Cancel(); |
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40 delete iMsg; |
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41 delete iExpireTimer; |
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42 } |
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43 |
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44 void CMessageSender::DoCancel() |
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45 /** |
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46 * Specific cancel implementation for message sender |
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47 * |
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48 * @internalTechnology |
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49 */ |
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50 { |
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51 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("CMessageSender::DoCancel"))); |
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52 iSocket.CancelSend(); |
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53 } |
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54 |
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55 void CMessageSender::Cancel() |
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56 /** |
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57 * Specific cancel implementation overriding CActive's implemention |
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58 * |
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59 * @internalTechnology |
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60 */ |
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61 { |
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62 if (iExpireTimer) |
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63 { |
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64 iExpireTimer->Cancel(); |
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65 } |
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66 CActive::Cancel(); |
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67 if (IsAdded()) |
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68 { |
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69 Deque(); |
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70 } |
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71 } |
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72 |
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73 void CMessageSender::TimerExpired() |
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74 /** |
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75 * Ticking timer expired so resend the message |
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76 * |
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77 * @internalTechnology |
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78 */ |
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79 { |
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80 iRetryCount++; |
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81 iRetryDuration += iMicroSecs.Int(); |
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82 |
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83 TTime now; |
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84 TTimeIntervalSeconds tempSecs; |
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85 now.HomeTime(); |
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86 (void)now.SecondsFrom(iTaskStartedAtCopy, tempSecs); |
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87 TUint16 time =static_cast<TUint16>(tempSecs.Int()); |
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88 |
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89 if(CMessageSender::GetFamilyType() == KAfInet) |
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90 { |
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91 TUint8* elapsedOptionBody = const_cast<TUint8*>(iMsg->Des().Ptr()) + DHCPv4::KLengthUptoSecs; |
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92 TBigEndian::SetValue( elapsedOptionBody, DHCPv4::KSecsElapsedLength, time ); |
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93 } |
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94 |
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95 if ( SendingContinues() ) |
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96 { |
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97 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("CMessageSender::TimerExpired - SendTo"))); |
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98 iSocket.SendTo(*iMsg, iAddr, 0, iStatus); |
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99 SetActive(); |
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100 } |
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101 else |
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102 { |
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103 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("CMessageSender::TimerExpired - RunError"))); |
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104 RunError(KErrTimedOut); |
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105 } |
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106 } |
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107 |
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108 void CMessageSender::SendL(TInetAddr& aAddr, const TDesC8& aMsg, TTimeIntervalMicroSeconds aSecs, TInt aRetryCount) |
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109 /** |
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110 * Copy message and send the first time |
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111 * |
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112 * @internalTechnology |
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113 */ |
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114 { |
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115 iMaxRetryCount = aRetryCount; |
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116 iRetryCount = -1; //the very first send doesn't count as a retry |
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117 iRetryDuration = 0; |
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118 iAddr = aAddr; |
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119 if (!iMsg || iMsg->Des().MaxLength() < aMsg.Length()) |
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120 { |
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121 delete iMsg; |
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122 iMsg = NULL; |
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123 iMsg = HBufC8::NewL(aMsg.Length()); |
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124 } |
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125 iMsg->Des().Copy(aMsg); |
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126 ASSERT(!IsAdded()); |
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127 CActiveScheduler::Add(this); |
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128 |
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129 iMicroSecs = aSecs.Int64(); |
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130 if ( CalculateDelay() ) |
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131 { |
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132 StartTimerL(); |
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133 } |
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134 else |
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135 { |
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136 TimerExpired(); |
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137 } |
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138 } |
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139 |
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140 void CMessageSender::StartTimerL() |
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141 { |
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142 if (!iExpireTimer) |
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143 { |
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144 iExpireTimer = CExpireTimer::NewL(); |
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145 } |
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146 iExpireTimer->After(iMicroSecs, *this); |
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147 } |
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148 |
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149 TBool CMessageSender::SendingContinues() const |
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150 { |
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151 |
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152 if(iRetryCount == iMaxRetryCount /*DHCPv4::KReqMaxRetry*/) |
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153 { |
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154 return EFalse; |
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155 } |
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156 #ifdef _DEBUG |
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157 TTimeIntervalMicroSeconds32 msec = KWaitForResponseTime * KMicrosecondsInSecs; |
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158 if (CDHCPServer::DebugFlags() & KDHCP_SetShortRetryTimeOut) |
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159 { |
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160 msec = KDHCP_ShortRetryTimeOut * KMicrosecondsInSecs; |
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161 } |
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162 |
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163 return iMicroSecs.Int()<=msec.Int(); |
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164 #else |
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165 return iMicroSecs.Int()<=static_cast<TInt>(KWaitForResponseTime * KMicrosecondsInSecs); |
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166 #endif |
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167 } |
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168 |
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169 TBool CMessageSender::CalculateDelay() |
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170 { |
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171 if ( iRetryCount > -1 ) |
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172 {// exponential backoff algorithm |
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173 //iMicroSecs = iMicroSecs.Int()*2; |
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174 iMicroSecs = iMicroSecs.Int() * 2; |
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175 } |
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176 return iRetryCount > -1; |
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177 } |
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178 |
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179 void CMessageSender::RunL() |
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180 /** |
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181 * RunL called when the message has been sent. It checks the retransmition conditions |
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182 * and either ends with timeout or re-sets the timer accordingly. |
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183 * |
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184 * @internalTechnology |
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185 */ |
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186 { |
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187 __CFLOG_VAR((KLogSubSysDHCP, KLogCode, _L8("CMessageSender::RunL - %d"), iStatus.Int())); |
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188 if ( !iMMSListener || iStatus.Int() == KErrNone |
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189 || iMMSListener->MSReportError(iStatus.Int()) == KErrNone ) |
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190 { |
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191 CalculateDelay(); |
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192 StartTimerL(); |
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193 } |
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194 else |
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195 { |
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196 User::Leave(iStatus.Int()); |
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197 } |
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198 } |
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199 |
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200 TInt CMessageSender::RunError(TInt aError) |
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201 /** |
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202 * RunError performs some cleanup after RunL leaves |
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203 * |
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204 * @internalTechnology |
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205 */ |
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206 { |
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207 if (iMMSListener) |
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208 { |
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209 if ( (aError = iMMSListener->MSReportError(aError)) == KErrNone ) |
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210 {//continue, no check for max values we assume that the listener knows what |
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211 //it's doing |
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212 ASSERT( iExpireTimer ); |
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213 ++iRetryCount; |
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214 CalculateDelay(); |
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215 iExpireTimer->After(iMicroSecs, *this); |
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216 } |
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217 } |
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218 return KErrNone; |
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219 } |
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220 |