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1 /* |
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2 * Copyright (c) 2007-2009 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 the License "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: |
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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 #include "sntpclientengine.h" |
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20 #include "util.h" |
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21 |
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22 // 40 second timeout on operations |
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23 #define SNTP_ENGINE_TIMEOUT 40000000 |
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24 |
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25 // NTP port |
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26 |
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27 #define SNTP_REMOTE_PORT 123 |
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28 |
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29 _LIT(KNTPEpochDate,"19000000:"); |
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30 |
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31 /* The simplest possible NTP request */ |
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32 |
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33 static const TUint8 sntpRequest[48] = { |
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34 0x23, 0x00, 0x00, 0x00, |
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35 0x00, 0x00, 0x00, 0x00, |
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36 0x00, 0x00, 0x00, 0x00, |
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37 0x00, 0x00, 0x00, 0x00, |
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38 0x00, 0x00, 0x00, 0x00, |
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39 0x00, 0x00, 0x00, 0x00, |
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40 0x00, 0x00, 0x00, 0x00, |
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41 0x00, 0x00, 0x00, 0x00, |
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42 0x00, 0x00, 0x00, 0x00, |
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43 0x00, 0x00, 0x00, 0x00, |
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44 0x00, 0x00, 0x00, 0x00, |
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45 0x00, 0x00, 0x00, 0x00 }; |
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46 |
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47 /* The main engine of the SNTP client */ |
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48 |
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49 CSNTPClient* CSNTPClient::NewL(TCommandLineArgs& aArgs) |
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50 { |
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51 CSNTPClient* self = CSNTPClient::NewLC(aArgs); |
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52 CleanupStack::Pop(self); |
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53 return self; |
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54 } |
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55 |
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56 CSNTPClient* CSNTPClient::NewLC(TCommandLineArgs& aArgs) |
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57 { |
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58 CSNTPClient* self = new (ELeave) CSNTPClient(aArgs); |
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59 CleanupStack::PushL(self); |
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60 self->ConstructL(); |
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61 return self; |
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62 } |
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63 |
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64 TSNTPClientState CSNTPClient::State() |
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65 { |
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66 return iState; |
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67 } |
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68 |
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69 void CSNTPClient::Start() |
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70 { |
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71 |
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72 iState = EStateResolve; |
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73 iResolver.GetByName(*(iArgs.iServers[iServerIndex]), iNameEntry, iStatus); |
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74 SetActive(); |
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75 iTimer->After(SNTP_ENGINE_TIMEOUT); |
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76 |
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77 } |
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78 |
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79 CSNTPClient::~CSNTPClient() |
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80 { |
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81 Cancel(); |
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82 iResolver.Close(); |
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83 iSock.Close(); |
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84 iSockServ.Close(); |
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85 |
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86 delete iTimer; |
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87 } |
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88 |
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89 CSNTPClient::CSNTPClient(TCommandLineArgs& aArgs) |
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90 : CActive(EPriorityStandard), iArgs(aArgs) |
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91 { |
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92 } |
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93 |
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94 void CSNTPClient::ConstructL() |
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95 { |
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96 User::LeaveIfError(iSockServ.Connect()); |
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97 User::LeaveIfError(iSock.Open(iSockServ, KAfInet, KSockDatagram, KProtocolInetUdp)); |
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98 User::LeaveIfError(iResolver.Open(iSockServ, KAfInet, KProtocolInetUdp)); |
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99 |
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100 iTimer = CTimeOutTimer::NewL(EPriorityHigh, *this); |
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101 CActiveScheduler::Add(this); |
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102 } |
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103 |
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104 void CSNTPClient::RunL() |
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105 { |
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106 |
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107 if (iStatus.Int() < 0) |
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108 { |
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109 User::Leave(iStatus.Int()); |
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110 } |
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111 |
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112 switch (iState) |
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113 { |
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114 |
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115 case EStateResolve: |
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116 iTimer->Cancel(); |
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117 iBuffer.Zero(); |
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118 iBuffer.Append(sntpRequest, 48); |
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119 |
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120 // set the port on the address |
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121 iNameEntry().iAddr.SetPort(SNTP_REMOTE_PORT); |
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122 |
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123 iState = EStateWrite; |
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124 iSock.SendTo(iBuffer, iNameEntry().iAddr, 0, iStatus); |
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125 SetActive(); |
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126 iTimer->After(SNTP_ENGINE_TIMEOUT); |
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127 break; |
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128 |
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129 case EStateWrite: |
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130 iTimer->Cancel(); |
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131 iState = EStateRead; |
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132 iBuffer.Zero(); |
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133 iSock.RecvFrom(iBuffer, iNameEntry().iAddr, 0, iStatus); |
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134 SetActive(); |
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135 iTimer->After(SNTP_ENGINE_TIMEOUT); |
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136 break; |
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137 |
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138 case EStateRead: |
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139 { |
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140 iTimer->Cancel(); |
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141 SetTimeL(); |
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142 iStatus = KRequestPending; |
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143 iState = EStateComplete; |
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144 TRequestStatus* status = &iStatus; |
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145 SetActive(); |
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146 User::RequestComplete(status, KErrNone); |
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147 break; |
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148 } |
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149 |
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150 case EStateComplete: |
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151 CActiveScheduler::Stop(); |
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152 // done |
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153 break; |
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154 |
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155 default: |
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156 // wuh oh. BC break! |
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157 User::Leave(KErrArgument); |
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158 break; |
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159 |
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160 } |
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161 |
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162 } |
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163 |
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164 void CSNTPClient::DoCancel() |
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165 { |
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166 |
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167 iTimer->Cancel(); |
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168 |
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169 switch (iState) |
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170 { |
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171 case EStateResolve: |
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172 iResolver.Cancel(); |
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173 break; |
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174 case EStateWrite: |
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175 iSock.CancelSend(); |
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176 break; |
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177 case EStateRead: |
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178 iSock.CancelRecv(); |
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179 break; |
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180 } |
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181 |
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182 } |
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183 |
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184 |
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185 TInt CSNTPClient::RunError(TInt /* aError */) |
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186 { |
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187 // The current server didn't work, lets try the next if available. |
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188 iTimer->Cancel(); |
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189 |
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190 if (++iServerIndex < iArgs.iServers.Count()) |
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191 { |
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192 Start(); |
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193 } |
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194 else |
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195 { |
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196 iState = EStateFailed; |
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197 CActiveScheduler::Stop(); |
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198 } |
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199 return KErrNone; |
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200 } |
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201 |
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202 void CSNTPClient::TimerExpired() |
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203 { |
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204 Cancel(); |
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205 |
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206 // The current server didn't work, lets try the next if available. |
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207 |
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208 if (++iServerIndex < iArgs.iServers.Count()) |
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209 { |
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210 Start(); |
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211 } |
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212 else |
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213 { |
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214 iState = EStateAborted; |
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215 CActiveScheduler::Stop(); |
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216 } |
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217 } |
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218 |
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219 void CSNTPClient::SetTimeL() |
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220 { |
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221 |
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222 TUint32 timestamp(0); |
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223 |
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224 /* Use the seconds from the transmit time field |
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225 TO DO: |
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226 + Implement proper differential here |
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227 */ |
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228 |
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229 for (TInt i = 40; i < 44; ++i) |
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230 { |
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231 timestamp = (timestamp << 8) + iBuffer[i]; |
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232 } |
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233 |
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234 // Obtain the time, including the specified timezone offset |
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235 |
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236 TTimeIntervalMinutes mins(timestamp / 60); |
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237 TTimeIntervalSeconds secs(timestamp % 60); |
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238 |
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239 TTime ntpTime; |
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240 User::LeaveIfError(ntpTime.Set(KNTPEpochDate)); |
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241 ntpTime += mins; |
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242 ntpTime += secs; |
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243 |
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244 // Apply offset and (possibly) daylight savings time |
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245 |
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246 TTimeIntervalHours hours; |
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247 |
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248 if (iArgs.iApplyDaylightSavings && Util::DaylightSavingsAppliesL(ntpTime)) |
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249 { |
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250 hours = iArgs.iOffset + 1; |
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251 } |
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252 else |
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253 { |
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254 hours = iArgs.iOffset; |
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255 } |
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256 |
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257 ntpTime += hours; |
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258 |
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259 User::LeaveIfError(User::SetHomeTime(ntpTime)); |
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260 |
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261 } |
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262 |
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263 |
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264 /* Timeout handler for read/write operations */ |
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265 |
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266 CTimeOutTimer::CTimeOutTimer(const TInt aPriority) |
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267 : CTimer(aPriority) |
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268 { |
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269 } |
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270 |
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271 CTimeOutTimer::~CTimeOutTimer() |
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272 { |
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273 Cancel(); |
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274 } |
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275 |
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276 CTimeOutTimer* CTimeOutTimer::NewL(const TInt aPriority, MTimeOutNotify& aTimeOutNotify) |
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277 { |
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278 CTimeOutTimer *p = new (ELeave) CTimeOutTimer(aPriority); |
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279 CleanupStack::PushL(p); |
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280 p->ConstructL(aTimeOutNotify); |
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281 CleanupStack::Pop(); |
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282 return p; |
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283 } |
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284 |
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285 void CTimeOutTimer::ConstructL(MTimeOutNotify &aTimeOutNotify) |
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286 { |
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287 iNotify=&aTimeOutNotify; |
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288 CTimer::ConstructL(); |
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289 CActiveScheduler::Add(this); |
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290 } |
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291 |
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292 void CTimeOutTimer::RunL() |
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293 // Timer request has completed, so notify the timer's owner |
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294 { |
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295 iNotify->TimerExpired(); |
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296 } |