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1 // Copyright (c) 2008-2009 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 // This file consists of implementation of DNS Proxy engine. This is the controller |
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15 // class which reads configuration from resolver.ini, configures DNS Proxy components |
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16 // and starts and stops the listener. |
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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 /** |
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22 @file |
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23 @internalTechnology |
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24 */ |
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25 |
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26 #include <es_sock.h> |
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27 #include <cflog.h> |
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28 #include "e32debug.h" |
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29 #include "dnsproxylistener.h" |
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30 #include "dnsproxyengine.h" |
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31 #include "dnsproxyservconf.h" |
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32 #include "dnsproxylog.h" |
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33 #include "inet6log.h" |
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34 |
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35 //intializing the static object |
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36 CDnsProxyEngine* CDnsProxyEngine::iDnsProxyEngine = NULL; |
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37 |
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38 CDnsProxyEngine* CDnsProxyEngine::NewL() |
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39 /** |
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40 * This is the two phase construction method and is leaving function |
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41 * @param - None |
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42 * @return - None |
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43 * |
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44 * @internalTechnology |
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45 */ |
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46 { |
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47 __LOG("\n CDnsProxyEngine::NewL Entry") |
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48 CDnsProxyEngine* pEngine = new(ELeave)CDnsProxyEngine(); |
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49 CleanupStack::PushL(pEngine); |
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50 pEngine->ConstructL(); |
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51 CleanupStack::Pop(); |
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52 __LOG("\n CDnsProxyEngine::NewL Exit") |
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53 return pEngine; |
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54 } |
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55 |
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56 |
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57 CDnsProxyEngine::CDnsProxyEngine() |
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58 /** |
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59 * This is the constructor for this class |
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60 * @param - None |
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61 * @return - None |
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62 * |
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63 * @internalTechnology |
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64 */ |
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65 |
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66 { |
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67 __LOG("\n CDnsProxyEngine::CDnsProxyEngine Entry") |
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68 iConfigData = NULL; |
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69 iConfigDataErr = 0; |
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70 __LOG("\n CDnsProxyEngine::CDnsProxyEngine Exit") |
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71 } |
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72 /* This is the destructor and deletes all the member variables and thus |
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73 * releases all the memory assosicated with those objects |
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74 */ |
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75 CDnsProxyEngine::~CDnsProxyEngine() |
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76 /** |
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77 * This is the destructor and deletes all the member variables and thus |
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78 * releases all the memory assosicated with those objects |
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79 * @param - None |
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80 * @return - None |
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81 * |
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82 * @internalTechnology |
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83 **/ |
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84 |
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85 { |
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86 __LOG("\n CDnsProxyEngine::~CDnsProxyEngine Entry") |
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87 delete iConfigData; |
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88 delete iProxyServer; |
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89 delete iListener; |
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90 delete iDnsproxydb; |
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91 iSockServ.Close(); |
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92 __LOG("\n CDnsProxyEngine::~CDnsProxyEngine Exit") |
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93 } |
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94 /* This is second phase construction where in all objects will be created |
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95 * which potentially may leave due to resource problem |
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96 */ |
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97 void CDnsProxyEngine::ConstructL() |
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98 /** |
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99 * This is the second phase of construction. |
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100 * Create intances of proxy database, config server and listener classes. |
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101 * Reads configuration values from .ini file |
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102 * @param - None |
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103 * @return - None |
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104 * |
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105 * @internalTechnology |
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106 **/ |
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107 { |
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108 __LOG("\n CDnsProxyEngine::ConstructL Entry") |
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109 //Reads the configuration from .ini file |
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110 ReadConfiguration(); |
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111 User::LeaveIfError(iSockServ.Connect()); |
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112 __LOG("After Reading configuration") |
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113 iDnsproxydb = CDnsProxyDb::CreateInstanceL(*this); |
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114 iProxyServer = CDnsServerConfig::NewL(*this); |
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115 iListener = CDnsProxyListener::NewL(*this); |
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116 |
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117 __LOG("\n CDnsProxyEngine::ConstructL Exit") |
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118 } |
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119 |
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120 /* This is function reads configuration values from configuration file |
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121 * |
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122 */ |
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123 void CDnsProxyEngine::ReadConfiguration() |
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124 /** |
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125 * |
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126 * This method reads configuration values from .ini file |
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127 * @param - None |
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128 * @return - None |
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129 * |
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130 * @internalTechnology |
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131 **/ |
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132 |
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133 { |
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134 __LOG("\n CDnsProxyEngine::ReadConfiguration Entry") |
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135 iConfigParams.iSessionCount = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_NUM_SOCK_SESSION,KSessioncount); |
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136 iConfigParams.iRetryCount = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_NUM_RETRIES,KRetrycount); |
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137 iConfigParams.iQSize = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_QUEUE_SIZE,KQSize); |
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138 iConfigParams.iTTL = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_TTL,KTtl); |
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139 iConfigParams.iDbSize = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_DB_SIZE,KDbSize); |
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140 iConfigParams.iTimerVal = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_TIMER_VAL,KTimerVal); |
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141 |
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142 iConfigParams.iSerialNum = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_SERIAL_NUM,KSerialNum); |
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143 iConfigParams.iRefreshTime = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_REFRESH_TIME,KRefreshTime); |
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144 iConfigParams.iRetryTime = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_RETRY_TIME,KRetryTime); |
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145 iConfigParams.iExpiretime = GetIniValue(DNS_PROXY_INI_SECTION,DNS_PROXY_INI_EXPIRE_TIME,KExpireTime); |
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146 |
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147 __LOG1("\n CDnsProxyEngine::ReadConfiguration iSessionCount (%d)",iConfigParams.iSessionCount) |
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148 __LOG1("\n CDnsProxyEngine::ReadConfiguration iRetryCount (%d)",iConfigParams.iRetryCount) |
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149 __LOG1("\n CDnsProxyEngine::ReadConfiguration iTimerVal (%d)",iConfigParams.iTimerVal) |
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150 UnLoadConfigurationFile(); |
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151 } |
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152 |
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153 TInt CDnsProxyEngine::Start(const RMessage2& aMessage) |
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154 /** |
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155 * This is entry point of DNS Proxy functionality. The DHCP server session |
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156 * calls this using client API to start dnsproxy. |
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157 * @param aMessage - Message send by the client |
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158 * @return - None |
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159 * |
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160 * @internalTechnology |
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161 **/ |
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162 |
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163 { |
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164 TInt err; |
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165 __LOG("\n CDnsProxyEngine::Start Entry") |
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166 err = SetDlinkConnectionInfo(aMessage); |
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167 if(err!=KErrNone) |
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168 return err; |
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169 |
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170 err = iListener->Activate(); |
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171 __LOG("\n CDnsProxyEngine::ReadConfiguration Exit") |
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172 return err; |
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173 } |
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174 |
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175 void CDnsProxyEngine::Stop() |
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176 /** |
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177 * This stops the listener and deletes all the objects.The method is called at the time |
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178 * of shutdown. |
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179 * @param - None |
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180 * @return - None |
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181 * |
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182 * @internalTechnology |
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183 **/ |
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184 { |
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185 __LOG("\n CDnsProxyEngine::Stop Entry") |
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186 iListener->StopListener(); |
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187 __LOG("\n CDnsProxyEngine::Stop Exit") |
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188 } |
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189 |
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190 TBool CDnsProxyEngine::FindVar(const TDesC &aSection, const TDesC &aVarName, TInt &aResult) |
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191 /** |
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192 * This will find specified value for variable in the configuation file |
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193 * @param aSection - represents the section name in configuration file |
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194 * @param aVarName - represents name in the specified section |
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195 * @param aResult - sets the corresponding values for above given varname |
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196 * @return - returns the boolean flag - if name value pair or loading configuration |
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197 * - fails then returns false |
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198 * @panic - system wide errors |
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199 * |
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200 * @internalTechnology |
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201 **/ |
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202 { |
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203 __LOG("\n DnsProxyEngine::FindVar") |
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204 if(LoadConfigurationFile()) |
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205 { |
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206 ASSERT(iConfigData); // <-- lint gag |
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207 return iConfigData->FindVar(aSection, aVarName, aResult); |
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208 } |
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209 __LOG("\n DnsProxyEngine::FindVar Exit") |
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210 return EFalse; |
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211 } |
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212 |
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213 TBool CDnsProxyEngine::LoadConfigurationFile() |
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214 /** |
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215 * This will load the configuaration file into memory. |
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216 * If it is already loaded then returns true otherwise loads the file |
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217 * @param - None |
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218 * @return boolean - retursn boolean value either true or false |
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219 * |
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220 * @internalTechnology |
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221 **/ |
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222 |
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223 { |
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224 __LOG("\n CDnsProxyEngine::LoadConfigurationFile Entry") |
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225 if (iConfigData) |
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226 return TRUE; // Already loaded! |
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227 if (iConfigDataErr) |
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228 return FALSE; |
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229 TRAP(iConfigDataErr, iConfigData = CESockIniData::NewL(DNS_PROXY_INI_DATA)); |
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230 __LOG("\n CDnsProxyEngine::LoadConfigurationFile Exit") |
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231 return (iConfigData != NULL); |
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232 } |
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233 |
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234 void CDnsProxyEngine::UnLoadConfigurationFile() |
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235 /** |
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236 * This will unload the configuaration file from memory. |
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237 * @param - None |
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238 * @return - None |
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239 * |
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240 * @internalTechnology |
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241 **/ |
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242 |
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243 { |
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244 __LOG("\n CDnsProxyEngine::UnloadConfigurationFile Entry") |
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245 delete iConfigData; |
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246 iConfigData = NULL; |
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247 iConfigDataErr = 0; |
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248 __LOG("\n CDnsProxyEngine::UnloadConfigurationFile Exit") |
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249 } |
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250 |
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251 TInt CDnsProxyEngine::GetIniValue(const TDesC &aSection, const TDesC &aName, TInt aValue) |
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252 /** |
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253 * This function reads the value for given name in the specified section |
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254 * @param aSection - represents the section name in configuration file |
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255 * @param aName - represents name in specified section |
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256 * @param aValue - represents default value |
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257 * @return boolean - retursn boolean value either true or false |
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258 * |
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259 * @internalTechnology |
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260 **/ |
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261 |
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262 { |
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263 __LOG("\n CDnsProxyEngine::GetIniValue Entry") |
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264 LOG(_LIT(KFormat, "\t[%S] %S = %d")); |
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265 TInt value; |
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266 if (!FindVar(aSection, aName, value)) |
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267 value = aValue; |
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268 LOG(Log::Printf(KFormat, &aSection, &aName, value)); |
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269 __LOG1("CDnsProxyEngine::GetIniValue %d",value); |
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270 |
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271 return value; |
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272 } |
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273 |
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274 TInt CDnsProxyEngine::AddDbEntryL(const RMessage2& aMsg) |
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275 /** |
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276 * This method updates DB. |
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277 * @param aMessage - Message send by the client |
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278 * @return - None |
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279 * |
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280 * @internalTechnology |
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281 **/ |
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282 { |
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283 if(!iDnsproxydb) |
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284 return KErrBadHandle; |
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285 |
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286 TBuf8<KMaxName> dbdata; |
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287 TBuf16<KAddrLength> ipaddress; |
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288 |
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289 aMsg.Read(0,ipaddress); |
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290 aMsg.Read(1,dbdata); |
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291 |
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292 TInetAddr address; |
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293 address.Input(ipaddress); |
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294 |
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295 TInt current_size = iDnsproxydb->GetDbSize(); |
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296 if(current_size < iConfigParams.iDbSize) |
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297 { |
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298 iDnsproxydb->UpdateDbL(dbdata,address); |
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299 } |
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300 else |
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301 { |
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302 return KErrGeneral; |
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303 } |
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304 __LOG("\n CDnsProxyEngine::AddDbEntryL Exit") |
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305 return KErrNone; |
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306 } |
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307 |
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308 TInt CDnsProxyEngine::RemoveDbEntry(const RMessage2& aMsg) |
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309 /** |
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310 * This method updates DB. |
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311 * @param aMessage - Message send by the client |
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312 * @return - None |
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313 * |
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314 * @internalTechnology |
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315 **/ |
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316 { |
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317 if(!iDnsproxydb) |
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318 return KErrBadHandle; |
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319 |
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320 __LOG("\n CDnsProxyEngine::RemoveDbEntry Entry") |
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321 TBuf16<KAddrLength> ipaddress; |
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322 |
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323 aMsg.Read(0,ipaddress); |
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324 |
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325 TInetAddr address; |
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326 address.Input(ipaddress); |
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327 iDnsproxydb->DeleteDbEntry(address); |
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328 __LOG("\n CDnsProxyEngine::RemoveDbEntry Exit") |
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329 return KErrNone; |
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330 } |
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331 |
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332 void CDnsProxyEngine::UpdateLocalAddr(TInetAddr& aAddr) |
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333 /** |
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334 * This method updates interface address in the engine. |
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335 * @param addr - Listen interface address |
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336 * @return - None |
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337 * |
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338 * @internalTechnology |
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339 **/ |
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340 { |
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341 __LOG("\n CDnsProxyEngine::UpdateLocalAddr Entry/Exit") |
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342 iProxyIfAddr = aAddr; |
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343 } |
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344 |
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345 TInt CDnsProxyEngine::UpdateDomainInfo(const RMessage2& aMsg) |
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346 /** |
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347 * This method updates DB. |
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348 * @param aMessage - Message send by the client |
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349 * @return - None |
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350 * |
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351 * @internalTechnology |
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352 **/ |
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353 { |
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354 TInt err = KErrNone; |
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355 __LOG("\n CDnsProxyEngine::UpdateDomainInfo Entry") |
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356 err = aMsg.Read(0,iSuffixInfo); |
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357 return err; |
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358 } |
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359 |
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360 |
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361 TInt CDnsProxyEngine::IsSuffixAvailable() |
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362 /** |
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363 * This method checks if suffix is available. |
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364 * @param None |
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365 * @return Length- Length of suffix data |
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366 * |
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367 * @internalTechnology |
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368 **/ |
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369 |
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370 { |
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371 __LOG("\n CDnsProxyEngine::IsSuffixAvailable Entry/Exit") |
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372 return iSuffixInfo.Length(); |
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373 } |
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374 |
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375 |
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376 |
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377 CDnsProxyEngine* CDnsProxyEngine::GetInstanceL() |
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378 { |
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379 /** |
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380 * This method returns single ton pointer to CDnsProxyEngine |
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381 * @param None |
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382 * @return iUplinkConnection |
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383 * |
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384 * @internalTechnology |
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385 **/ |
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386 __LOG("\n CDnsProxyEngine::GetInstanceL Entry") |
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387 if(!iDnsProxyEngine) |
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388 { |
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389 __LOG("\n first time creation ") |
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390 iDnsProxyEngine = CDnsProxyEngine::NewL(); |
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391 } |
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392 __LOG("\n CDnsProxyEngine::GetInstanceL Exit") |
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393 return iDnsProxyEngine; |
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394 } |
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395 |
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396 |
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397 TInt CDnsProxyEngine::SetUplinkConnectionInfo(const RMessage2 &aMessage) |
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398 /** |
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399 * This method reads uplink connection info from the message. |
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400 * @param aMessage - Message send by the client |
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401 * @return - None |
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402 * |
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403 * @internalTechnology |
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404 **/ |
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405 |
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406 { |
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407 |
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408 __LOG("\n CDnsProxyEngine::SetUplinkConnectionInfo Entry") |
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409 |
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410 TInt err = iListener->SetUplinkConnectionInfo(aMessage); |
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411 __LOG("\n CDnsProxyEngine::SetUplinkConnectionInfo Exit") |
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412 return err; |
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413 |
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414 } |
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415 |
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416 TInt CDnsProxyEngine::SetDlinkConnectionInfo(const RMessage2 &aMessage) |
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417 /** |
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418 * This method reads downlink connection info from the message. |
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419 * @param aMessage - Message send by the client |
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420 * @return - None |
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421 * |
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422 * @internalTechnology |
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423 **/ |
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424 |
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425 { |
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426 __LOG("\n CDnsProxyEngine::SetDlinkConnectionInfo Entry") |
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427 TInt err = iListener->SetDlinkConnectionInfo(aMessage); |
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428 __LOG("\n CDnsProxyEngine::SetDlinkConnectionInfo End") |
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429 return err; |
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430 } |