Mercurial > hg > orthanc

annotate Core/DicomNetworking/DicomStoreUserConnection.cpp @ 3825:4570c57668a8

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refactoring DicomUserConnection as Dicom[Control|Store]UserConnection
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 10 Apr 2020 16:04:54 +0200
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children e82bd07c384e
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3825
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "DicomStoreUserConnection.h"
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36
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37 #include "../Logging.h"
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38 #include "../OrthancException.h"
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39
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40 namespace Orthanc
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41 {
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42 bool DicomStoreUserConnection::ProposeStorageClass(const std::string& sopClassUid,
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43 const std::set<DicomTransferSyntax>& syntaxes)
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44 {
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45 size_t requiredCount = syntaxes.size();
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46 if (proposeUncompressedSyntaxes_)
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47 {
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48 requiredCount += 1;
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49 }
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50
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51 if (association_.GetRemainingPropositions() <= requiredCount)
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52 {
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53 return false; // Not enough room
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54 }
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55
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56 for (std::set<DicomTransferSyntax>::const_iterator
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57 it = syntaxes.begin(); it != syntaxes.end(); ++it)
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58 {
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59 association_.ProposePresentationContext(sopClassUid, *it);
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60 }
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61
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62 if (proposeUncompressedSyntaxes_)
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63 {
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64 std::set<DicomTransferSyntax> uncompressed;
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65
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66 if (syntaxes.find(DicomTransferSyntax_LittleEndianImplicit) == syntaxes.end())
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67 {
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68 uncompressed.insert(DicomTransferSyntax_LittleEndianImplicit);
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69 }
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70
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71 if (syntaxes.find(DicomTransferSyntax_LittleEndianExplicit) == syntaxes.end())
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72 {
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73 uncompressed.insert(DicomTransferSyntax_LittleEndianExplicit);
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74 }
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75
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76 if (proposeRetiredBigEndian_ &&
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77 syntaxes.find(DicomTransferSyntax_BigEndianExplicit) == syntaxes.end())
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78 {
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79 uncompressed.insert(DicomTransferSyntax_BigEndianExplicit);
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80 }
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81
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82 if (!uncompressed.empty())
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83 {
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84 association_.ProposePresentationContext(sopClassUid, uncompressed);
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85 }
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86 }
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87
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88 return true;
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89 }
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90
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91
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92 bool DicomStoreUserConnection::LookupPresentationContext(
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93 uint8_t& presentationContextId,
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94 const std::string& sopClassUid,
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95 DicomTransferSyntax transferSyntax)
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96 {
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97 typedef std::map<DicomTransferSyntax, uint8_t> PresentationContexts;
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98
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99 PresentationContexts pc;
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100 if (association_.IsOpen() &&
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101 association_.LookupAcceptedPresentationContext(pc, sopClassUid))
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102 {
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103 PresentationContexts::const_iterator found = pc.find(transferSyntax);
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104 if (found != pc.end())
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105 {
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106 presentationContextId = found->second;
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107 return true;
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108 }
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109 }
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110
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111 return false;
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112 }
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113
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114
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115 DicomStoreUserConnection::DicomStoreUserConnection(
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116 const DicomAssociationParameters& params) :
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117 parameters_(params),
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118 proposeCommonClasses_(true),
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119 proposeUncompressedSyntaxes_(true),
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120 proposeRetiredBigEndian_(false)
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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 void DicomStoreUserConnection::PrepareStorageClass(const std::string& sopClassUid,
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126 DicomTransferSyntax syntax)
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127 {
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128 StorageClasses::iterator found = storageClasses_.find(sopClassUid);
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129
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130 if (found == storageClasses_.end())
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131 {
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132 std::set<DicomTransferSyntax> ts;
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133 ts.insert(syntax);
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134 storageClasses_[sopClassUid] = ts;
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135 }
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136 else
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137 {
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138 found->second.insert(syntax);
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139 }
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140 }
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141
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142
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143 bool DicomStoreUserConnection::NegotiatePresentationContext(
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144 uint8_t& presentationContextId,
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145 const std::string& sopClassUid,
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146 DicomTransferSyntax transferSyntax)
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147 {
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148 /**
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149 * Step 1: Check whether this presentation context is already
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150 * available in the previously negociated assocation.
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151 **/
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152
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153 if (LookupPresentationContext(presentationContextId, sopClassUid, transferSyntax))
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154 {
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155 return true;
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156 }
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157
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158 // The association must be re-negotiated
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159 LOG(INFO) << "Re-negociating DICOM association with "
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160 << parameters_.GetRemoteApplicationEntityTitle();
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161 association_.ClearPresentationContexts();
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162 PrepareStorageClass(sopClassUid, transferSyntax);
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163
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164
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165 /**
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166 * Step 2: Propose at least the mandatory SOP class.
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167 **/
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168
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169 {
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170 StorageClasses::const_iterator mandatory = storageClasses_.find(sopClassUid);
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171
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172 if (mandatory == storageClasses_.end() ||
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173 mandatory->second.find(transferSyntax) == mandatory->second.end())
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174 {
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175 throw OrthancException(ErrorCode_InternalError);
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176 }
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177
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178 if (!ProposeStorageClass(sopClassUid, mandatory->second))
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179 {
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180 // Should never happen in real life: There are no more than
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181 // 128 transfer syntaxes in DICOM!
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182 throw OrthancException(ErrorCode_InternalError,
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183 "Too many transfer syntaxes for SOP class UID: " + sopClassUid);
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184 }
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185 }
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186
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187
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188 /**
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189 * Step 3: Propose all the previously spotted SOP classes, as
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190 * registered through the "PrepareStorageClass()" method.
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191 **/
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192
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193 for (StorageClasses::const_iterator it = storageClasses_.begin();
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194 it != storageClasses_.end(); ++it)
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195 {
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196 if (it->first != sopClassUid)
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197 {
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198 ProposeStorageClass(it->first, it->second);
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199 }
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200 }
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201
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202
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203 /**
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204 * Step 4: As long as there is room left in the proposed
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205 * presentation contexts, propose the uncompressed transfer syntaxes
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206 * for the most common SOP classes, as can be found in the
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207 * "dcmShortSCUStorageSOPClassUIDs" array from DCMTK. The
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208 * preferred transfer syntax is "LittleEndianImplicit".
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209 **/
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210
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211 if (proposeCommonClasses_)
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212 {
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213 std::set<DicomTransferSyntax> ts;
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214 ts.insert(DicomTransferSyntax_LittleEndianImplicit);
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215
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216 for (int i = 0; i < numberOfDcmShortSCUStorageSOPClassUIDs; i++)
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217 {
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218 std::string c(dcmShortSCUStorageSOPClassUIDs[i]);
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219
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220 if (c != sopClassUid &&
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221 storageClasses_.find(c) == storageClasses_.end())
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222 {
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223 ProposeStorageClass(c, ts);
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224 }
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225 }
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226 }
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227
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228
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229 /**
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230 * Step 5: Open the association, and check whether the pair (SOP
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231 * class UID, transfer syntax) was accepted by the remote host.
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232 **/
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233
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234 association_.Open(parameters_);
4570c57668a8 refactoring DicomUserConnection as Dicom[Control|Store]UserConnection
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
235 return LookupPresentationContext(presentationContextId, sopClassUid, transferSyntax);
4570c57668a8 refactoring DicomUserConnection as Dicom[Control|Store]UserConnection
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
236 }
4570c57668a8 refactoring DicomUserConnection as Dicom[Control|Store]UserConnection
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
237 }