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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 class represents the database in the form of array |
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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 /** |
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20 @file |
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21 @internalTechnology |
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22 */ |
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23 #include <e32debug.h> |
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24 #include <cflog.h> |
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25 #include "dnsproxydb.h" |
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26 #include "dnsproxyengine.h" |
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27 #include "inet6log.h" |
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28 #include "dnsproxylog.h" |
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29 |
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30 // |
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31 CDnsProxyDb* CDnsProxyDb::iDbObject= NULL; |
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32 |
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33 CDnsProxyDb* CDnsProxyDb::CreateInstanceL(CDnsProxyEngine& aEngine) |
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34 /** |
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35 * Creates the single object everytime |
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36 * @return iDbObject- reference to CDnsProxyDb; |
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37 * |
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38 * @internalTechnology |
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39 **/ |
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40 { |
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41 if(!iDbObject) |
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42 { |
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43 iDbObject = new(ELeave)CDnsProxyDb(aEngine); |
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44 } |
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45 return iDbObject; |
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46 } |
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47 |
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48 CDnsProxyDb::CDnsProxyDb(CDnsProxyEngine& aEngine):iEngine(aEngine) |
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49 /** |
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50 * Constructor |
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51 * |
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52 * @internalTechnology |
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53 **/ |
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54 |
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55 { |
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56 } |
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57 |
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58 CDnsProxyDb::~CDnsProxyDb() |
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59 /** |
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60 * Destructor |
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61 * |
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62 * @internalTechnology |
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63 **/ |
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64 { |
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65 Cleanup(); |
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66 } |
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67 |
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68 void CDnsProxyDb::UpdateDbL(const TDesC8& aHostName,TInetAddr& aHostAddr) |
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69 /** |
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70 * Updates the DB with HostName and Host Address |
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71 * @param aHostName - Host Name |
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72 * @param aHostAddr - Host Address |
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73 * |
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74 * @internalTechnology |
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75 **/ |
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76 { |
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77 |
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78 TDnsProxydbElement* aDbElement = new TDnsProxydbElement; |
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79 aDbElement->iHostName.Copy(aHostName); |
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80 aDbElement->iHostAddr = aHostAddr ; |
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81 iElementList.AppendL(aDbElement); |
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82 } |
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83 |
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84 TDnsProxydbElement* CDnsProxyDb::GetRecordList(const TDesC8& aQName) |
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85 /** |
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86 * Returns the array of TDnsProxydbElement object having same name as that of QueryName |
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87 * @param aName- Query Name to be searched in db |
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88 * @return element - returns the reference to TDnsProxydbElement |
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89 * |
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90 * @internalTechnology |
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91 **/ |
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92 { |
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93 TBool flag = EFalse; |
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94 TDnsProxydbElement* element = NULL; |
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95 for(TInt i =0;i<iElementList.Count();i++) |
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96 { |
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97 if(iElementList[i]) |
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98 { |
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99 flag = CompareNames(iElementList[i]->iHostName,aQName); |
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100 if(flag) |
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101 { |
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102 element = iElementList[i]; |
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103 break; |
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104 } |
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105 } |
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106 } |
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107 return element; |
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108 } |
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109 |
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110 void CDnsProxyDb::AddRRecord(TDnsProxydbElement& aElementList,const TDesC8& aRRecord,TUint16 aDnsQType) |
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111 /** |
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112 * Adds record into db |
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113 * @param aElementList - associates with record to be inserted into db |
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114 * @param aRRecord - record to be added into db which may be of type AN or NS |
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115 * @param aFlag - which will indicate type of record like NS or AN |
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116 * @internalTechnology |
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117 **/ |
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118 { |
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119 aElementList.iRecord.Copy(aRRecord); |
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120 aElementList.iDnsQType = aDnsQType; |
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121 } |
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122 |
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123 void CDnsProxyDb::Cleanup() |
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124 /** |
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125 * Destroys all the obejcts present in the array list and empties it |
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126 * @internalTechnology |
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127 **/ |
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128 { |
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129 iElementList.ResetAndDestroy(); |
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130 } |
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131 TDnsProxydbElement* CDnsProxyDb::FindIpAddress(TInetAddr& aAddr) |
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132 /** |
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133 * Finds specified entry from db based on IP address |
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134 * @param aAddr - TInetAddress |
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135 * @return dbelement - pointer to TDnsProxydbElement class |
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136 * |
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137 * @internalTechnology |
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138 **/ |
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139 { |
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140 |
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141 TDnsProxydbElement* dbelement = NULL; |
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142 for(TInt i = 0;i < iElementList.Count();i++) |
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143 { |
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144 |
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145 if(iElementList[i]) |
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146 { |
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147 if(aAddr.Match(iElementList[i]->iHostAddr)) |
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148 { |
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149 dbelement = iElementList[i]; |
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150 break; |
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151 } |
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152 } |
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153 } |
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154 |
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155 return dbelement; |
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156 } |
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157 |
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158 void CDnsProxyDb::DeleteDbEntry(TInetAddr& aAddr) |
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159 /** |
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160 * Deletes specified entry from db based on IP address |
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161 * @return TBool - returns ETrue if it is successful otherwise EFalse |
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162 * |
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163 * @internalTechnology |
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164 **/ |
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165 { |
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166 for(TInt i =0;i<iElementList.Count();i++) |
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167 { |
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168 if(iElementList[i]) |
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169 { |
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170 |
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171 TInetAddr ipaddr = iElementList[i]->iHostAddr; |
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172 if(ipaddr.Match(aAddr)) |
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173 { |
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174 delete iElementList[i]; |
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175 iElementList[i] = NULL; |
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176 iElementList.Remove(i); |
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177 iElementList.Compress(); |
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178 } |
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179 } |
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180 } |
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181 } |
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182 |
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183 TBool CDnsProxyDb::CompareNames(const TDesC8& aHostName,const TDesC8& aQueryName) |
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184 /** |
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185 * Compare Query Name with Host Name present in db |
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186 * @param aHostName - Host name retrived from db |
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187 * @param aQueryName - Query name to be compared with Host Name |
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188 * @return TBool - ETrue if it sucessful otherwise EFalse |
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189 * |
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190 * @internalTechnology |
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191 **/ |
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192 { |
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193 TInt ret_val = aHostName.Compare(aQueryName); |
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194 if(ret_val==0) |
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195 return ETrue; |
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196 return EFalse; |
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197 } |
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198 |
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199 TInt CDnsProxyDb::GetDbSize() |
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200 /** |
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201 * Retunrs the current size of the db |
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202 * @return size - current size of db |
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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 return iElementList.Count(); |
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208 } |