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1 // Copyright (c) 2005-2009 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 // Name : CBerTlv.cpp |
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15 // Part of : Series 60 / utility |
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16 // Based on 3GPP TS 11.14 V8.8.0 |
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17 // Version : 1.0 |
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18 // EXTERNAL RESOURCES |
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19 // |
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20 |
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21 |
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22 |
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23 // Include Files |
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24 #include "CBerTlv.h" // Header of this class |
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25 #include "tflogger.h" // For logging |
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26 |
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27 // External Data Structures |
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28 // none |
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29 |
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30 // External Function Prototypes |
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31 // none |
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32 |
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33 // LOCAL CONSTANTS AND MACROS |
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34 // none |
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35 |
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36 // MODULE DATA STRUCTURES |
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37 // none |
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38 |
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39 // Local Data Structures |
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40 // none |
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41 |
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42 // Local Function Prototypes |
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43 // none |
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44 |
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45 // LOCAL FUNCTIONS |
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46 // none |
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47 |
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48 // MEMBER FUNCTIONS |
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49 |
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50 //============================================================================= |
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51 |
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52 // ----------------------------------------------------------------------------- |
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53 // CBerTlv::CBerTlv |
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54 // Constructor |
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55 // ----------------------------------------------------------------------------- |
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56 // |
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57 EXPORT_C CBerTlv::CBerTlv |
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58 ( |
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59 // None |
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60 ) |
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61 { |
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62 // None |
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63 } |
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64 |
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65 // ----------------------------------------------------------------------------- |
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66 // CBerTlv::TlvByTagValue |
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67 // Find TLV by tag value. aTlv is set to point to found TLV. If there are more |
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68 // than one TLV with the same tag then itemNbr can be used to select which one |
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69 // is returned. If no tags are found return KErrNotFound else KErrNone. |
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70 // ----------------------------------------------------------------------------- |
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71 // |
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72 EXPORT_C TInt CBerTlv::TlvByTagValue |
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73 ( |
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74 CTlv* aTlv, // TLV |
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75 TUint8 aTlvTagValue, // TLV identifier |
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76 TInt itemNbr // Item number |
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77 ) |
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78 { |
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79 TFLOGSTRING("UTILITY: CBerTlv::TlvByTagValue"); |
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80 TInt currentTlv( 0 ); |
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81 TInt tlvLength( 0 ); |
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82 TInt index( 0 ); |
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83 |
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84 // TLV start index |
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85 TInt ind( KCommonTlvHeaderLength ); |
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86 TUint8 berTlvLength( 0 ); |
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87 if ( KTwoByteLengthCoding == iData[KTlvLengthStartPosition] ) |
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88 { |
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89 berTlvLength = iData[KTlvLengthStartPosition + 1]; |
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90 ind = ind + 1; |
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91 } |
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92 else |
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93 { |
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94 berTlvLength = iData[KTlvLengthStartPosition]; |
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95 } |
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96 |
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97 for ( TInt i = 0; i < berTlvLength; i += tlvLength ) |
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98 { |
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99 // First determine if the length of the TLV is coded with 1 or 2 bytes. |
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100 if ( KTwoByteLengthCoding == iData[ind + 1] ) |
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101 { |
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102 // Length is coded with 2 bytes -> 1 extra byte required to be |
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103 // added to total length. Also TLV header bytes (2) must be added |
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104 // to total length |
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105 tlvLength = iData[ind + 2] + KTlvHeaderLength + 1; |
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106 } |
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107 else |
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108 { |
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109 // TLV header bytes (2) must be added to total length |
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110 tlvLength = iData[ind + 1] + KTlvHeaderLength; |
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111 } |
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112 |
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113 currentTlv = iData[ind]&KTagValueMask; |
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114 |
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115 // Check if TLV in current index is the one that we are searching for |
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116 if ( aTlvTagValue == currentTlv ) |
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117 { |
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118 if( index == itemNbr) |
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119 { |
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120 TPtrC8 data = ( iData.Mid( ind , tlvLength ) ); |
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121 aTlv->SetData( data ); |
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122 return KErrNone; |
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123 } |
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124 else |
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125 { |
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126 index++; |
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127 } |
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128 } |
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129 |
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130 ind += tlvLength; |
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131 } |
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132 |
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133 return KErrNotFound; |
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134 } |
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135 |
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136 // ----------------------------------------------------------------------------- |
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137 // CBerTlv::TlvByTagValueMulti |
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138 // Find several TLVs by tag value. It is assumed that TLVs are sequential. aTlv |
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139 // is set to point to TLV sequence. If no tags are found return KErrNotFound |
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140 // else KErrNone. |
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141 // ----------------------------------------------------------------------------- |
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142 // |
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143 EXPORT_C TInt CBerTlv::TlvByTagValueMulti |
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144 ( |
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145 CTlv* aTlv, // TLV to fill |
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146 TUint8 aTlvTagValue // Tag of TLV to find |
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147 ) |
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148 { |
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149 TFLOGSTRING("UTILITY: CBerTlv::TlvByTagValueMulti"); |
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150 TInt currentTlv( 0 ); |
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151 TInt16 tlvLength( 0 ); |
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152 TInt indMulti( 0 ); |
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153 TInt16 multiLength( 0 ); |
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154 // TLV start index |
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155 TInt ind( KCommonTlvHeaderLength ); |
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156 TUint8 berTlvLength; |
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157 // First determine if the length of the BerTLV is coded with 1 or 2 bytes. |
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158 if ( KTwoByteLengthCoding == iData[KTlvLengthStartPosition] ) |
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159 { |
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160 berTlvLength = iData[KTlvLengthStartPosition + 1]; |
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161 ind = ind + 1; |
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162 } |
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163 else |
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164 { |
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165 berTlvLength = iData[KTlvLengthStartPosition]; |
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166 } |
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167 |
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168 for ( TInt i = 0; i < berTlvLength; i+= tlvLength ) |
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169 { |
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170 // First determine if the length of the TLV is coded with 1 or 2 bytes. |
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171 if ( KTwoByteLengthCoding == iData[ind + 1] ) |
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172 { |
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173 // Length is coded with 2 bytes -> real length is in second byte. |
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174 // first byte is 81 and it is tag for 2 byte length coding. |
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175 tlvLength = static_cast<TInt16>( iData[ind + 0x02] + |
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176 KTlvHeaderLength + 1 ); |
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177 } |
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178 else |
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179 { |
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180 // TLV header bytes (2) must be added to total length |
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181 tlvLength = static_cast<TInt16>( iData[ind + 1] + |
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182 KTlvHeaderLength ); |
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183 } |
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184 |
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185 currentTlv = iData[ind]&KTagValueMask; |
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186 |
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187 // Check if TLV in current index is the one that we are searching for |
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188 if ( aTlvTagValue == currentTlv && multiLength == 0x00 ) |
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189 { |
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190 // Save first tag position |
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191 indMulti = ind; |
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192 multiLength = tlvLength; |
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193 } |
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194 // Add length |
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195 if ( aTlvTagValue == currentTlv && indMulti != ind ) |
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196 { |
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197 multiLength = static_cast<TInt16>( multiLength + tlvLength ); |
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198 } |
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199 |
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200 // If last tag, return |
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201 if ( (i + tlvLength) >= berTlvLength ) |
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202 { |
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203 TPtrC8 data = ( iData.Mid( indMulti , multiLength ) ); |
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204 aTlv->SetData( data ); |
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205 break; |
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206 } |
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207 ind += tlvLength; |
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208 } |
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209 |
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210 if( 0 == indMulti) |
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211 { |
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212 return KErrNotFound; |
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213 } |
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214 else |
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215 { |
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216 return KErrNone; |
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217 } |
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218 } |
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219 |
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220 |
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221 //End Of File |