1 /* |
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2 * Copyright (c) 2007 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: RTSP response parser and producer* |
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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 // INCLUDE FILES |
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21 #include "CCRRtspResponse.h" |
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22 #include "CRRTSPCommon.h" |
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23 #include "videoserviceutilsLogger.h" |
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24 |
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25 // CONSTANTS |
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26 const TInt KDVRMinRTSPResponseLen( 14 ); |
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27 |
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28 // ============================ MEMBER FUNCTIONS =============================== |
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29 |
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30 // ----------------------------------------------------------------------------- |
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31 // CCRRtspResponse::CCRRtspResponse |
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32 // C++ default constructor can NOT contain any code, that might leave. |
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33 // ----------------------------------------------------------------------------- |
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34 // |
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35 CCRRtspResponse::CCRRtspResponse() |
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36 : iStatusCode( ERTSPRespContinue ), |
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37 iServerPort( KErrNotFound ), |
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38 iSSRC( NULL, 0 ) |
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39 { |
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40 // None |
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41 } |
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42 |
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43 // ----------------------------------------------------------------------------- |
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44 // CCRRtspResponse::NewL |
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45 // Two-phased constructor. |
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46 // ----------------------------------------------------------------------------- |
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47 // |
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48 CCRRtspResponse* CCRRtspResponse::NewL() |
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49 { |
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50 CCRRtspResponse* self = new( ELeave ) CCRRtspResponse(); |
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51 CleanupStack::PushL( self ); |
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52 self->ConstructL(); |
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53 CleanupStack::Pop( self ); |
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54 return self; |
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55 } |
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56 |
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57 // ----------------------------------------------------------------------------- |
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58 // CCRRtspResponse::ConstructL |
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59 // Symbian 2nd phase constructor can leave. |
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60 // ----------------------------------------------------------------------------- |
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61 // |
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62 void CCRRtspResponse::ConstructL() |
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63 { |
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64 // None |
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65 } |
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66 |
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67 // ----------------------------------------------------------------------------- |
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68 // CCRRtspResponse::~CCRRtspResponse |
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69 // Destructor. |
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70 // ----------------------------------------------------------------------------- |
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71 // |
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72 CCRRtspResponse::~CCRRtspResponse() |
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73 { |
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74 LOG( "CCRRtspResponse::~CCRRtspResponse" ); |
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75 } |
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76 |
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77 // ----------------------------------------------------------------------------- |
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78 // CCRRtspResponse::TryParseL |
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79 // |
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80 // ----------------------------------------------------------------------------- |
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81 // |
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82 void CCRRtspResponse::TryParseL( const TDesC8 &aString ) |
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83 { |
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84 if ( aString.Length() < KDVRMinRTSPResponseLen ) |
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85 { |
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86 LOG( "CCRRtspResponse::TryParseL(), Length less than minimum, Leaved: KErrUnderflow" ); |
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87 User::Leave( KErrUnderflow ); |
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88 } |
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89 |
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90 // Copy the stuff into local variable: |
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91 delete iRtspText; iRtspText = NULL; |
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92 iRtspText = aString.AllocL(); |
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93 |
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94 const TInt KReplyHeaderOffset( KCRRTSPReplyHeader().Length() ); |
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95 const TInt KStatusNumberLen( 5 ); |
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96 |
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97 // Try to find out if end of the command has been received |
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98 // "RTSP/1.0 XXX\r\n\r\n" at least.. |
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99 TInt replyEndOffSet = aString.FindC( KCR2NewLines() ); |
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100 if ( replyEndOffSet == KErrNotFound ) |
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101 { |
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102 // Need to have more, do nothing yet.. except that some servers |
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103 // do not append 2 newlines to 404 or other error responses: |
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104 if ( !aString.Left( KReplyHeaderOffset ).CompareC( KCRRTSPReplyHeader() ) ) |
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105 { |
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106 TPtrC8 statusNumberString( |
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107 aString.Mid( KReplyHeaderOffset, KStatusNumberLen ) ); |
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108 TLex8 statusNumberLex( statusNumberString ); |
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109 TInt statusCodeInteger( KErrNotFound ); |
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110 User::LeaveIfError ( statusNumberLex.Val( statusCodeInteger ) ) ; |
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111 iStatusCode = static_cast<TResponseCode>( statusCodeInteger ); |
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112 if ( iStatusCode != ERTSPRespOK && |
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113 iStatusCode != ERTSPRespCreated && |
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114 iStatusCode != ERTSPRespProxyAuthenticationRequired && |
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115 iStatusCode != ERTSPRespUnauthorized ) |
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116 { |
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117 // Was something else than ok or unauthorized-401 |
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118 FindCSeqL(); |
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119 LOG1( "CCRRtspResponse::TryParseL() out, with rtsp error code: %d", iStatusCode ); |
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120 return; |
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121 } |
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122 } |
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123 |
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124 LOG( "CCRRtspResponse::TryParseL() out, because response not complete" ); |
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125 User::Leave( KErrUnderflow ); |
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126 } |
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127 |
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128 LOG1( "CCRRtspResponse::TryParseL(), replyEndOffSet: %d", replyEndOffSet ); |
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129 |
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130 // Find status code: |
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131 if ( iRtspText->Left( KReplyHeaderOffset ).CompareC( KCRRTSPReplyHeader() ) == 0 ) |
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132 { |
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133 TPtrC8 statusNumberString( iRtspText->Mid( |
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134 KReplyHeaderOffset, KStatusNumberLen ) ); |
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135 TLex8 statusNumberLex( statusNumberString ); |
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136 TInt statusCodeInteger( KErrNotFound ); |
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137 User::LeaveIfError ( statusNumberLex.Val( statusCodeInteger ) ); |
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138 iStatusCode = ( TResponseCode )( statusCodeInteger ); |
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139 } |
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140 else |
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141 { |
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142 LOG( "CCRRtspResponse::TryParseL(), Statuscode integer not found !" ); |
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143 User::Leave( KErrNotSupported ); |
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144 } |
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145 |
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146 LOG1( "CCRRtspResponse::TryParseL(), iStatusCode: %d", iStatusCode ); |
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147 |
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148 FindContentL(); |
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149 // Then find CSeq |
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150 FindCSeqL(); |
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151 // Then find session id |
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152 FindSessionIdL(); |
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153 // Then find server ports |
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154 FindServerPorts(); |
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155 // Then find SSRC |
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156 FindSSRC(); |
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157 // Then try finding rtp-info header if it was play reply |
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158 FindRTPInfoHeader(); |
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159 // Find possible transport method |
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160 // IMPORTANT: should be done before parsing client port |
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161 FindTransport(); |
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162 // Find possible client port |
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163 FindClientPorts(); |
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164 if ( iServerPort == KErrNotFound && iClientPort != KErrNotFound ) |
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165 { |
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166 LOG( "CCRRtspResponse::TryParseL(), using client port as server port -> UGLY!!" ); |
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167 iServerPort = iClientPort ; |
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168 } |
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169 // Find destination address is existing |
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170 FindDestination(); |
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171 // Try finding authentication |
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172 FindRTPAuthenticationL(); |
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173 // Try to find range header |
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174 ParseRange(); |
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175 // Try to find session-base header |
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176 FindContentBase(); |
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177 } |
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178 |
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179 // ----------------------------------------------------------------------------- |
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180 // CCRRtspResponse::StatusCode |
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181 // |
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182 // ----------------------------------------------------------------------------- |
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183 // |
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184 CCRRtspResponse::TResponseCode CCRRtspResponse::StatusCode( void ) |
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185 { |
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186 return iStatusCode; |
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187 } |
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188 |
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189 // ----------------------------------------------------------------------------- |
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190 // CCRRtspResponse::FindServerPorts |
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191 // |
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192 // method that finds server port numeric value |
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193 // ----------------------------------------------------------------------------- |
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194 // |
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195 void CCRRtspResponse::FindServerPorts( void ) |
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196 { |
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197 iServerPort = KErrNotFound; |
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198 TInt portNumberOffset( iRtspText->FindC( KCRServerPort ) ); |
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199 if ( portNumberOffset != KErrNotFound ) |
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200 { |
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201 const TInt KDVRPortNumberMaxLen ( 5 ) ; |
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202 TPtrC8 portNumberStr( iRtspText->Mid( |
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203 portNumberOffset + KCRServerPort().Length() + 1, KDVRPortNumberMaxLen ) ); |
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204 TLex8 portNumberLex( portNumberStr ); |
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205 if ( portNumberLex.Val( iServerPort ) != KErrNone ) |
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206 { // something wrong? |
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207 LOG( "CCRRtspResponse::FindServerPorts(), portNumberLex.Val() != KErrNone" ); |
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208 iServerPort = KErrNotFound; |
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209 } |
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210 } |
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211 } |
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212 |
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213 // ----------------------------------------------------------------------------- |
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214 // CCRRtspResponse::ServerPort |
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215 // |
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216 // method that returns server port numeric value |
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217 // ----------------------------------------------------------------------------- |
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218 // |
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219 TInt CCRRtspResponse::ServerPort( void ) |
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220 { |
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221 return iServerPort; |
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222 } |
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223 |
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224 // ----------------------------------------------------------------------------- |
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225 // CCRRtspResponse::FindSSRC |
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226 // |
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227 // ----------------------------------------------------------------------------- |
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228 // |
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229 void CCRRtspResponse::FindSSRC( void ) |
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230 { |
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231 LOG( "CCRRtspResponse::FindSSRC() in" ); |
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232 TInt SSRCOffset( KErrNotFound ); |
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233 iSSRC.Set( NULL, 0 ); |
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234 |
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235 if ( ( SSRCOffset = iRtspText->FindC( KCRSSRC ) ) != KErrNotFound ) |
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236 { |
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237 TPtrC8 SSRCStr( iRtspText->Right( |
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238 ( iRtspText->Length() - SSRCOffset ) - 6 ) ); |
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239 TInt SSRCLen( 0 ); |
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240 for ( TInt i( 0 ); i < SSRCStr.Length(); i++ ) |
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241 { |
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242 if ( TChar( SSRCStr[i] ).IsAlphaDigit() ) |
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243 { |
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244 SSRCLen++; |
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245 } |
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246 else |
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247 { |
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248 iSSRC.Set( SSRCStr.Mid( 0, SSRCLen ) ); |
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249 } |
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250 } |
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251 } |
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252 } |
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253 |
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254 // ----------------------------------------------------------------------------- |
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255 // CCRRtspResponse::SSRC |
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256 // |
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257 // method that returns SSRC string |
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258 // ----------------------------------------------------------------------------- |
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259 // |
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260 TInt CCRRtspResponse::SSRC( TPtrC8& aSSRC ) |
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261 { |
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262 if ( iSSRC.Ptr() != NULL ) |
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263 { |
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264 aSSRC.Set( iSSRC ); |
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265 return KErrNone; |
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266 } |
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267 else |
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268 { |
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269 return KErrNotFound; |
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270 } |
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271 } |
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272 |
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273 // ----------------------------------------------------------------------------- |
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274 // CCRRtspResponse::FindRTPInfoHeader |
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275 // |
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276 // method that partially parses rtp info header |
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277 // ----------------------------------------------------------------------------- |
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278 // |
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279 void CCRRtspResponse::FindRTPInfoHeader( void ) |
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280 { |
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281 TInt offset = iRtspText->FindC( KCRRtpInfo ); // "Rtp-Info: " |
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282 TInt url2OffSet( KErrNotFound ); |
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283 |
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284 iRTPInfoHeader.iFirstURL.Set( NULL , 0 ); |
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285 iRTPInfoHeader.iFirstSeq = 0; |
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286 iRTPInfoHeader.iFirstTS = 0; |
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287 iRTPInfoHeader.iSecondURL.Set( NULL, 0 ); |
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288 iRTPInfoHeader.iSecondSeq = 0; |
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289 iRTPInfoHeader.iSecondTS = 0; |
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290 |
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291 if ( offset > 0 ) |
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292 { |
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293 // Yes, there is header. That seems to be sucky to parse. We have delimiting |
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294 // characters ,; and nl and we may or may not find words url, seq and rtptime |
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295 // and maybe something else. We may be confident that there will be at max |
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296 // 2 url srings |
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297 offset += KCRRtpInfo().Length(); // add the len of "RTP-Info: " |
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298 TPtrC8 rtpInfoContent = iRtspText->Right( iRtspText->Length() - offset ); |
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299 TInt urlOffSet = rtpInfoContent.FindC( KCRUrlStr ); |
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300 |
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301 for ( TInt i( 0 ); urlOffSet != KErrNotFound && i < 2; i ++ ) |
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302 { |
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303 // At least one url string found |
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304 TPtrC8 urlContent( iRtspText->Right( iRtspText->Length() - |
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305 ( offset + urlOffSet + 4 ) ) ); |
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306 // Above string now contains rest of the PLAY commands RTSP OK response |
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307 // so in practice there is 2 url-strings. If so, find the next one |
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308 // and cut our string |
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309 if ( ( url2OffSet = urlContent.FindC( KCRUrlStr ) ) > 0 ) |
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310 { |
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311 urlContent.Set( urlContent.Left( url2OffSet ) ); |
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312 } |
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313 |
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314 // Ok, now there is only one url string in urlContent. |
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315 // then just find seq and ts |
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316 TInt seqOffSet = urlContent.FindC( KCRSeqStr ); |
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317 if ( seqOffSet != KErrNotFound ) |
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318 { |
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319 TPtrC8 seqContent( urlContent.Right( urlContent.Length() - |
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320 ( seqOffSet + KCRSeqStr().Length() ) ) ); |
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321 TLex8 seqLex( seqContent ); |
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322 if ( seqLex.Val( ( iRTPInfoHeader.iFirstURL.Length() == 0 )? |
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323 iRTPInfoHeader.iFirstSeq : iRTPInfoHeader.iSecondSeq, |
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324 EDecimal ) == KErrNone ) |
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325 { |
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326 TInt tsOffSet( urlContent.FindC( KCRRtptimeStr ) ); |
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327 if ( tsOffSet != KErrNotFound ) |
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328 { |
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329 TPtrC8 tsContent( urlContent.Right( urlContent.Length() - |
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330 ( tsOffSet + KCRRtptimeStr().Length() ) ) ); |
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331 TLex8 tsLex( tsContent ); |
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332 tsLex.Val( ( iRTPInfoHeader.iFirstURL.Length() == 0 )? |
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333 iRTPInfoHeader.iFirstTS: |
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334 iRTPInfoHeader.iSecondTS, EDecimal ); |
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335 } |
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336 } |
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337 else |
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338 { |
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339 urlContent.Set ( NULL , 0 ) ; |
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340 } |
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341 } |
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342 else |
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343 { |
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344 urlContent.Set ( NULL , 0 ) ; |
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345 } |
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346 |
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347 if ( urlContent.Length() > 0 ) |
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348 { |
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349 TInt semicolonOffSet( urlContent.Locate(';') ); |
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350 const TInt KDVRMinSemicolonOffset ( 5 ) ; |
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351 if ( iRTPInfoHeader.iFirstURL.Length() == 0 && semicolonOffSet > KDVRMinSemicolonOffset ) |
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352 { |
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353 iRTPInfoHeader.iFirstURL.Set( |
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354 urlContent.Mid( 0, semicolonOffSet ) ); |
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355 } |
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356 else |
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357 { |
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358 const TInt KDVRURLBeginOffset ( 4 ) ; |
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359 iRTPInfoHeader.iSecondURL.Set( |
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360 urlContent.Mid( KDVRURLBeginOffset, |
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361 semicolonOffSet - KDVRURLBeginOffset ) ); |
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362 } |
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363 } |
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364 |
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365 // Then continue with next url |
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366 urlOffSet = url2OffSet; |
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367 } |
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368 } |
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369 } |
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370 |
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371 // ----------------------------------------------------------------------------- |
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372 // CCRRtspResponse::RTPInfoHeader |
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373 // |
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374 // method that returns rtp-info header content |
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375 // ----------------------------------------------------------------------------- |
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376 // |
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377 TInt CCRRtspResponse::RTPInfoHeader( |
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378 CCRRtspResponse::SRTPInfoHeader &aRTPInfoHeader ) |
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379 { |
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380 if ( iRTPInfoHeader.iFirstURL.Length() == 0 ) |
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381 { |
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382 return KErrNotFound; |
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383 } |
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384 else |
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385 { |
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386 aRTPInfoHeader.iFirstURL.Set( iRTPInfoHeader.iFirstURL ); |
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387 aRTPInfoHeader.iFirstSeq = iRTPInfoHeader.iFirstSeq; |
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388 aRTPInfoHeader.iFirstTS = iRTPInfoHeader.iFirstTS; |
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389 aRTPInfoHeader.iSecondURL.Set( iRTPInfoHeader.iSecondURL ); |
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390 aRTPInfoHeader.iSecondSeq = iRTPInfoHeader.iSecondSeq; |
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391 aRTPInfoHeader.iSecondTS = iRTPInfoHeader.iSecondTS; |
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392 |
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393 return KErrNone; |
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394 } |
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395 } |
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396 |
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397 // ----------------------------------------------------------------------------- |
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398 // CCRRtspResponse::FindRTPAuthenticationL |
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399 // |
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400 // method that partially parses rtp authentication header |
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401 // ----------------------------------------------------------------------------- |
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402 // |
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403 void CCRRtspResponse::FindRTPAuthenticationL( void ) |
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404 { |
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405 TInt endPos( KErrNotFound ); |
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406 |
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407 // First look for authorization method(basic / digest) |
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408 TInt pos = iRtspText->FindC( KCRAuthDigest ); |
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409 |
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410 // digest |
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411 if ( pos != KErrNotFound ) |
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412 { |
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413 // Digest found, we can continue |
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414 LOG( "CCRRtspResponse::FindRTPAuthenticationL() Digest found" ); |
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415 |
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416 delete iAuthType; |
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417 iAuthType = NULL; |
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418 iAuthType = HBufC8::NewL( KCRAuthDigest().Length() ); |
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419 iAuthType->Des().Copy( KCRAuthDigest ); |
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420 |
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421 // find "realm" |
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422 pos = iRtspText->FindC( KCRAuthRealm ); |
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423 if ( pos != KErrNotFound ) |
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424 { |
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425 LOG( "CCRRtspResponse::FindRTPAuthenticationL() realm found" ); |
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426 pos = pos + KCRAuthRealm().Length(); // realm |
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427 endPos = iRtspText->Mid( pos ).LocateF( '"' ); |
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428 |
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429 if ( endPos != KErrNotFound ) |
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430 { |
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431 TPtrC8 data = iRtspText->Mid( pos ).Left( endPos ); |
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432 delete iRealm; |
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433 iRealm = NULL; |
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434 iRealm = HBufC8::NewL( data.Length() ); |
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435 iRealm->Des().Copy( data ); |
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436 } |
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437 } |
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438 |
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439 // Find "nonce" |
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440 pos = iRtspText->FindC( KCRAuthNonce() ); |
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441 if ( pos != KErrNotFound ) |
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442 { |
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443 LOG( "CCRRtspResponse::FindRTPAuthenticationL() nonce found" ); |
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444 pos = pos + KCRAuthNonce().Length(); // nonce |
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445 endPos = iRtspText->Mid( pos ).LocateF( '"' ); |
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446 if ( endPos != KErrNotFound ) |
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447 { |
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448 TPtrC8 nonceData = iRtspText->Mid( pos ).Left( endPos ); |
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449 delete iNonce; |
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450 iNonce = NULL; |
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451 iNonce = HBufC8::NewL( nonceData.Length() ); |
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452 iNonce->Des().Copy( nonceData ); |
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453 } |
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454 } |
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455 |
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456 // Find "opaque"(it seems that Darwin streaming server does not send this one) |
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457 pos = iRtspText->FindC( KCRAuthOpaque() ); |
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458 if ( pos != KErrNotFound ) |
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459 { |
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460 LOG( "CCRRtspResponse::FindRTPAuthenticationL() opaque found" ); |
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461 pos = pos + KCRAuthOpaque().Length(); // opaque |
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462 endPos = iRtspText->Mid( pos ).LocateF( '"' ); |
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463 if ( endPos != KErrNotFound ) |
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464 { |
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465 TPtrC8 opaqData = iRtspText->Mid( pos ).Left( endPos ); |
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466 delete iOpaque; |
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467 iOpaque = NULL; |
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468 iOpaque = HBufC8::NewL( opaqData.Length() ); |
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469 iOpaque->Des().Copy( opaqData ); |
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470 } |
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471 } |
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472 } |
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473 |
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474 // basic |
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475 else |
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476 { |
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477 pos = iRtspText->FindC( KCRAuthBasic ); |
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478 |
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479 if ( pos != KErrNotFound ) |
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480 { |
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481 LOG( "CCRRtspResponse::FindRTPAuthenticationL() Basic found" ); |
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482 |
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483 delete iAuthType; |
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484 iAuthType = NULL; |
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485 iAuthType = HBufC8::NewL( KCRAuthBasic().Length() ); |
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486 iAuthType->Des().Copy( KCRAuthBasic ); |
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487 |
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488 // find "realm" |
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489 pos = iRtspText->FindC( KCRAuthRealm ); |
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490 |
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491 if ( pos != KErrNotFound ) |
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492 { |
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493 LOG( "CCRRtspResponse::FindRTPAuthenticationL() realm found" ); |
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494 pos = pos + KCRAuthRealm().Length(); // realm |
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495 endPos = iRtspText->Mid( pos ).LocateF( '"' ); |
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496 |
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497 if ( endPos != KErrNotFound ) |
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498 { |
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499 TPtrC8 data = iRtspText->Mid( pos ).Left( endPos ); |
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500 delete iRealm; |
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501 iRealm = NULL; |
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502 iRealm = HBufC8::NewL( data.Length() ); |
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503 iRealm->Des().Copy( data ); |
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504 } |
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505 } |
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506 } |
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507 } |
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508 } |
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509 |
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510 // End of File |
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