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1 /* |
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2 * Copyright (c) 2004 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 "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: General packet handling routines. |
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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 |
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21 // INCLUDES |
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22 #include "srtppacket.h" |
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23 #include "srtpcryptohandler.h" |
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24 #include "srtpcryptocontext.h" |
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25 #include "srtputils.h" |
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26 #include "srtpmasterkey.h" |
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27 #include "srtpmastersalt.h" |
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28 |
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29 // ----------------------------------------------------------------------------- |
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30 // CSRTPPacket::CSRTPPacket |
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31 // ----------------------------------------------------------------------------- |
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32 // |
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33 CSRTPPacket::CSRTPPacket(const TDesC8& aPacket, |
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34 CSRTPCryptoHandler& aHandler) |
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35 : iPacket(aPacket), |
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36 iDataP(aPacket.Ptr()), |
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37 iHandler(aHandler), |
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38 iPayload(TPtrC8()), |
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39 iHeaderLength(0), |
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40 iPayloadLength(0) |
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41 { |
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42 |
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43 // set the current packet |
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44 iPacket.Set(aPacket.Ptr(), aPacket.Length()); |
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45 |
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46 } |
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47 |
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48 // ----------------------------------------------------------------------------- |
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49 // CSRTPPacket::~CSRTPPacket |
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50 // ----------------------------------------------------------------------------- |
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51 // |
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52 CSRTPPacket::~CSRTPPacket() |
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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 // CSRTPPacket::Payload() |
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59 // --------------------------------------------------------------------------- |
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60 // |
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61 TPtrC8 CSRTPPacket::Payload() |
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62 { |
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63 return iPayload; |
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64 } |
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65 |
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66 |
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67 // --------------------------------------------------------------------------- |
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68 // CSRTPPacket::HeaderLength() |
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69 // --------------------------------------------------------------------------- |
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70 // |
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71 TUint CSRTPPacket::HeaderLength() |
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72 { |
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73 return iHeaderLength; |
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74 } |
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75 |
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76 // --------------------------------------------------------------------------- |
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77 // CSRTPPacket::PayloadLength() |
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78 // --------------------------------------------------------------------------- |
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79 // |
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80 TUint CSRTPPacket::PayloadLength() |
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81 { |
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82 return iPayloadLength; |
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83 } |
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84 |
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85 |
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86 // --------------------------------------------------------------------------- |
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87 // CSRTPPacket::HeaderAndPayload() |
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88 // --------------------------------------------------------------------------- |
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89 // |
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90 TPtrC8 CSRTPPacket::HeaderAndPayload() |
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91 { |
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92 return iPacket.Mid(0, iHeaderLength + iPayloadLength); |
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93 } |
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94 |
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95 // --------------------------------------------------------------------------- |
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96 // CSRTPPacket::Get_Concatenated_MDataL() |
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97 // --------------------------------------------------------------------------- |
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98 // |
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99 HBufC8* CSRTPPacket::Get_Concatenated_MDataL(TBool rtcp) |
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100 { |
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101 TInt size = iHeaderLength + iPayloadLength; |
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102 if (rtcp) |
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103 { |
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104 //RFC 3711 3.4 SRCP authentication portion including index |
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105 size = size + KSRTCPPacketIndexLength4; |
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106 } |
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107 HBufC8* result = HBufC8::NewMaxL(size); |
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108 TUint8* ptr = const_cast<TUint8*>(result->Des().Ptr()); |
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109 |
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110 Mem::FillZ( ptr, size); |
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111 Mem::Copy( ptr, iDataP, size ); |
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112 |
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113 return result ; |
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114 } |
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115 |
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116 // --------------------------------------------------------------------------- |
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117 // CSRTPPacket::ConstructL() |
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118 // --------------------------------------------------------------------------- |
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119 // |
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120 void CSRTPPacket::ConstructL() |
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121 { |
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122 } |
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123 |
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124 |
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125 // ----------------------------------------------------------------------------- |
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126 // void CSRTPPacket::UpdatePayload |
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127 // ----------------------------------------------------------------------------- |
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128 // |
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129 void CSRTPPacket::UpdatePayload() |
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130 { |
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131 TPtrC8 payload = iPacket.Mid(iHeaderLength, iPayloadLength); |
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132 iPayload.Set(payload.Ptr(), iPayloadLength); |
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133 } |
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134 |
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135 // ----------------------------------------------------------------------------- |
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136 // void CSRTPPacket::CopyHeaderAndPayloadL |
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137 // ----------------------------------------------------------------------------- |
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138 // |
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139 HBufC8* CSRTPPacket::CopyHeaderAndPayloadL(TUint aPacketSize, |
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140 TUint8* aPayloadPtr) |
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141 { |
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142 HBufC8* packet = HBufC8::NewMaxL(aPacketSize); |
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143 |
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144 TUint8* packetPtr = const_cast<TUint8*>(packet->Des().Ptr()); |
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145 Mem::FillZ( packetPtr, aPacketSize); |
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146 |
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147 // First copy the header |
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148 Mem::Copy( packetPtr, iPacket.Ptr(), iHeaderLength); |
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149 // then copy the encrypted/decrypted payload |
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150 packetPtr += iHeaderLength; |
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151 Mem::Copy( packetPtr, aPayloadPtr, iPayloadLength); |
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152 |
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153 return packet; |
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154 } |
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155 |
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156 |
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157 |
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158 // VIRTUAL functions |
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159 |
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160 // --------------------------------------------------------------------------- |
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161 // CSRTPPacket::CreateDecryptedPacketL() |
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162 // --------------------------------------------------------------------------- |
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163 // |
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164 HBufC8* CSRTPPacket::CreateDecryptedPacketL(TUint8* /*aDecryptedPayloadPtr*/) |
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165 { |
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166 User::Leave(KErrTotalLossOfPrecision); |
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167 return NULL; |
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168 } |
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169 |
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170 // --------------------------------------------------------------------------- |
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171 // CSRTPPacket::CreateEncryptedPacketL() |
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172 // --------------------------------------------------------------------------- |
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173 // |
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174 HBufC8* CSRTPPacket::CreateEncryptedPacketL(TUint8* /*aEncryptedPayloadPtr*/) |
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175 { |
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176 User::Leave(KErrTotalLossOfPrecision); |
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177 return NULL; |
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178 } |
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179 |
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180 // --------------------------------------------------------------------------- |
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181 // CSRTPPacket::AuthenticationTag() |
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182 // --------------------------------------------------------------------------- |
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183 // |
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184 TPtrC8 CSRTPPacket::AuthenticationTag() |
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185 { |
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186 return NULL; |
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187 } |
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188 |
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189 // --------------------------------------------------------------------------- |
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190 // CSRTPPacket::SequenceNumber() |
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191 // --------------------------------------------------------------------------- |
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192 // |
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193 TUint16 CSRTPPacket::SequenceNumber() |
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194 { |
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195 return NULL; |
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196 } |
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197 |
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198 // --------------------------------------------------------------------------- |
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199 // CSRTPPacket::SetPacketIndex() |
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200 // --------------------------------------------------------------------------- |
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201 // |
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202 void CSRTPPacket::SetPacketIndex(TUint64 /*aPacketIndex*/) |
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203 { |
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204 } |
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205 |
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206 // --------------------------------------------------------------------------- |
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207 // CSRTPPacket::MasterKeyIdentifier() |
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208 // --------------------------------------------------------------------------- |
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209 // |
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210 TPtrC8 CSRTPPacket::MasterKeyIdentifier() |
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211 { |
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212 return NULL; |
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213 } |
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214 |
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215 // --------------------------------------------------------------------------- |
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216 // CSRTPPacket::CountSenderPacketIndex() |
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217 // --------------------------------------------------------------------------- |
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218 // |
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219 void CSRTPPacket::CountSenderPacketIndex() |
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220 { |
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221 } |
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222 |
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223 // --------------------------------------------------------------------------- |
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224 // CSRTPPacket::PacketIndex() |
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225 // --------------------------------------------------------------------------- |
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226 // |
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227 TUint64 CSRTPPacket::PacketIndex() |
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228 { |
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229 return NULL; |
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230 } |
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231 // --------------------------------------------------------------------------- |
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232 // CSRTPPacket::GetSenderROC |
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233 // --------------------------------------------------------------------------- |
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234 // |
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235 TUint32 CSRTPPacket::GetSenderROC() |
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236 { |
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237 return NULL; |
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238 } |