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annotate OrthancFramework/Sources/DicomNetworking/Internals/FindScp.cpp @ 4181:b416b6bf129b

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clarification of sdk doc about deadlocks
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 08 Sep 2020 09:16:33 +0200
parents 6774605d4341
children 7112a8af0b63
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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 Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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24 /*=========================================================================
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25
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26 This file is based on portions of the following project:
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27
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28 Program: DCMTK 3.6.0
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29 Module: http://dicom.offis.de/dcmtk.php.en
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31 Copyright (C) 1994-2011, OFFIS e.V.
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32 All rights reserved.
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33
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34 This software and supporting documentation were developed by
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36 OFFIS e.V.
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37 R&D Division Health
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38 Escherweg 2
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39 26121 Oldenburg, Germany
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41 Redistribution and use in source and binary forms, with or without
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42 modification, are permitted provided that the following conditions
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43 are met:
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45 - Redistributions of source code must retain the above copyright
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46 notice, this list of conditions and the following disclaimer.
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48 - Redistributions in binary form must reproduce the above copyright
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49 notice, this list of conditions and the following disclaimer in the
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50 documentation and/or other materials provided with the distribution.
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52 - Neither the name of OFFIS nor the names of its contributors may be
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53 used to endorse or promote products derived from this software
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54 without specific prior written permission.
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56 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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57 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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58 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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59 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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60 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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61 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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62 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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63 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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64 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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65 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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66 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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68 =========================================================================*/
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71
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72 #include "../../PrecompiledHeaders.h"
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73 #include "FindScp.h"
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74
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75 #include "../../DicomFormat/DicomArray.h"
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76 #include "../../DicomParsing/FromDcmtkBridge.h"
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77 #include "../../DicomParsing/ToDcmtkBridge.h"
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78 #include "../../Logging.h"
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79 #include "../../OrthancException.h"
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81 #include <dcmtk/dcmdata/dcfilefo.h>
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82 #include <dcmtk/dcmdata/dcdeftag.h>
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85
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86 /**
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87 * The function below is extracted from DCMTK 3.6.0, cf. file
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88 * "dcmtk-3.6.0/dcmwlm/libsrc/wldsfs.cc".
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89 **/
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90
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91 static void HandleExistentButEmptyReferencedStudyOrPatientSequenceAttributes(DcmDataset *dataset,
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92 const DcmTagKey &sequenceTagKey)
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93 // Date : May 3, 2005
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94 // Author : Thomas Wilkens
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95 // Task : This function performs a check on a sequence attribute in the given dataset. At two different places
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96 // in the definition of the DICOM worklist management service, a sequence attribute with a return type
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97 // of 2 is mentioned containing two 1C attributes in its item; the condition of the two 1C attributes
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98 // specifies that in case a sequence item is present, then these two attributes must be existent and
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99 // must contain a value. (I am talking about ReferencedStudySequence and ReferencedPatientSequence.)
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100 // In cases where the sequence attribute contains exactly one item with an empty ReferencedSOPClass
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101 // and an empty ReferencedSOPInstance, we want to remove the item from the sequence. This is what
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102 // this function does.
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103 // Parameters : dataset - [in] Dataset in which the consistency of the sequence attribute shall be checked.
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104 // sequenceTagKey - [in] DcmTagKey of the sequence attribute which shall be checked.
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105 // Return Value : none.
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106 {
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107 DcmElement *sequenceAttribute = NULL, *referencedSOPClassUIDAttribute = NULL, *referencedSOPInstanceUIDAttribute = NULL;
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108
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109 // in case the sequence attribute contains exactly one item with an empty
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110 // ReferencedSOPClassUID and an empty ReferencedSOPInstanceUID, remove the item
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111 if( dataset->findAndGetElement( sequenceTagKey, sequenceAttribute ).good() &&
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112 ( (DcmSequenceOfItems*)sequenceAttribute )->card() == 1 &&
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113 ( (DcmSequenceOfItems*)sequenceAttribute )->getItem(0)->findAndGetElement( DCM_ReferencedSOPClassUID, referencedSOPClassUIDAttribute ).good() &&
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114 referencedSOPClassUIDAttribute->getLength() == 0 &&
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115 ( (DcmSequenceOfItems*)sequenceAttribute )->getItem(0)->findAndGetElement( DCM_ReferencedSOPInstanceUID, referencedSOPInstanceUIDAttribute, OFFalse ).good() &&
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116 referencedSOPInstanceUIDAttribute->getLength() == 0 )
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117 {
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118 DcmItem *item = ((DcmSequenceOfItems*)sequenceAttribute)->remove( ((DcmSequenceOfItems*)sequenceAttribute)->getItem(0) );
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119 delete item;
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120 }
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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 namespace Orthanc
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126 {
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127 namespace
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128 {
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129 struct FindScpData
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130 {
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131 DicomServer::IRemoteModalities* modalities_;
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132 IFindRequestHandler* findHandler_;
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133 IWorklistRequestHandler* worklistHandler_;
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134 DicomFindAnswers answers_;
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135 DcmDataset* lastRequest_;
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136 const std::string* remoteIp_;
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137 const std::string* remoteAet_;
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138 const std::string* calledAet_;
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139
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140 FindScpData() : answers_(false)
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141 {
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142 }
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143 };
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144
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145
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146
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147 static void FixWorklistQuery(ParsedDicomFile& query)
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148 {
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149 // TODO: Check out
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150 // WlmDataSourceFileSystem::HandleExistentButEmptyDescriptionAndCodeSequenceAttributes()"
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151 // in DCMTK 3.6.0
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152
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153 DcmDataset* dataset = query.GetDcmtkObject().getDataset();
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154 HandleExistentButEmptyReferencedStudyOrPatientSequenceAttributes(dataset, DCM_ReferencedStudySequence);
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155 HandleExistentButEmptyReferencedStudyOrPatientSequenceAttributes(dataset, DCM_ReferencedPatientSequence);
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156 }
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157
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158
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159 static void FixFindQuery(DicomMap& target,
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160 const DicomMap& source)
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161 {
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162 // "The definition of a Data Set in PS3.5 specifically excludes
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163 // the range of groups below group 0008, and this includes in
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164 // particular Meta Information Header elements such as Transfer
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165 // Syntax UID (0002,0010)."
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166 // http://dicom.nema.org/medical/dicom/current/output/chtml/part04/sect_C.4.html#sect_C.4.1.1.3
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167 // https://groups.google.com/d/msg/orthanc-users/D3kpPuX8yV0/_zgHOzkMEQAJ
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168
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169 DicomArray a(source);
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170
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171 for (size_t i = 0; i < a.GetSize(); i++)
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172 {
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173 if (a.GetElement(i).GetTag().GetGroup() >= 0x0008)
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174 {
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175 target.SetValue(a.GetElement(i).GetTag(), a.GetElement(i).GetValue());
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176 }
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177 }
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178 }
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179
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180
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181
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182 void FindScpCallback(
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183 /* in */
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184 void *callbackData,
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185 OFBool cancelled,
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186 T_DIMSE_C_FindRQ *request,
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187 DcmDataset *requestIdentifiers,
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188 int responseCount,
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189 /* out */
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190 T_DIMSE_C_FindRSP *response,
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191 DcmDataset **responseIdentifiers,
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192 DcmDataset **statusDetail)
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193 {
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194 bzero(response, sizeof(T_DIMSE_C_FindRSP));
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195 *statusDetail = NULL;
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196
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197 std::string sopClassUid(request->AffectedSOPClassUID);
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198
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199 FindScpData& data = *reinterpret_cast<FindScpData*>(callbackData);
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200 if (data.lastRequest_ == NULL)
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201 {
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202 bool ok = false;
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203
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204 try
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205 {
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206 RemoteModalityParameters modality;
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207
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208 /**
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209 * Ensure that the remote modality is known to Orthanc for C-FIND requests.
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210 **/
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211
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212 assert(data.modalities_ != NULL);
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213 if (!data.modalities_->LookupAETitle(modality, *data.remoteAet_))
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214 {
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215 throw OrthancException(ErrorCode_UnknownModality,
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216 "Modality with AET \"" + (*data.remoteAet_) +
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217 "\" is not defined in the \"DicomModalities\" configuration option");
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218 }
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219
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220
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221 if (sopClassUid == UID_FINDModalityWorklistInformationModel)
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222 {
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223 data.answers_.SetWorklist(true);
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224
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225 if (data.worklistHandler_ != NULL)
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226 {
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227 ParsedDicomFile query(*requestIdentifiers);
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228 FixWorklistQuery(query);
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229
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230 data.worklistHandler_->Handle(data.answers_, query,
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231 *data.remoteIp_, *data.remoteAet_,
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232 *data.calledAet_, modality.GetManufacturer());
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233 ok = true;
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234 }
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235 else
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236 {
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237 LOG(ERROR) << "No worklist handler is installed, cannot handle this C-FIND request";
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238 }
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239 }
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240 else
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241 {
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242 data.answers_.SetWorklist(false);
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243
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244 if (data.findHandler_ != NULL)
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245 {
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246 std::list<DicomTag> sequencesToReturn;
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247
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248 for (unsigned long i = 0; i < requestIdentifiers->card(); i++)
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249 {
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250 DcmElement* element = requestIdentifiers->getElement(i);
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251 if (element && !element->isLeaf())
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252 {
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253 const DicomTag tag(FromDcmtkBridge::Convert(element->getTag()));
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254
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255 DcmSequenceOfItems& sequence = dynamic_cast<DcmSequenceOfItems&>(*element);
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256 if (sequence.card() != 0)
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257 {
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258 LOG(WARNING) << "Orthanc only supports sequence matching on worklists, "
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259 << "ignoring C-FIND SCU constraint on tag (" << tag.Format()
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260 << ") " << FromDcmtkBridge::GetTagName(*element);
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261 }
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262
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263 sequencesToReturn.push_back(tag);
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264 }
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265 }
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266
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267 DicomMap input;
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268 std::set<DicomTag> ignoreTagLength;
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269 FromDcmtkBridge::ExtractDicomSummary(input, *requestIdentifiers, 0 /* don't truncate tags */, ignoreTagLength);
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270
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271 DicomMap filtered;
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272 FixFindQuery(filtered, input);
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273
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274 data.findHandler_->Handle(data.answers_, filtered, sequencesToReturn,
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275 *data.remoteIp_, *data.remoteAet_,
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276 *data.calledAet_, modality.GetManufacturer());
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277 ok = true;
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278 }
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279 else
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280 {
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281 LOG(ERROR) << "No C-Find handler is installed, cannot handle this request";
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282 }
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283 }
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284 }
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285 catch (OrthancException& e)
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286 {
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287 // Internal error!
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288 LOG(ERROR) << "C-FIND request handler has failed: " << e.What();
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289 }
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290
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291 if (!ok)
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292 {
0
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293 response->DimseStatus = STATUS_FIND_Failed_UnableToProcess;
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294 *responseIdentifiers = NULL;
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295 return;
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296 }
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297
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298 data.lastRequest_ = requestIdentifiers;
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299 }
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300 else if (data.lastRequest_ != requestIdentifiers)
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301 {
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302 // Internal error!
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303 response->DimseStatus = STATUS_FIND_Failed_UnableToProcess;
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304 *responseIdentifiers = NULL;
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305 return;
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306 }
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307
0
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308 if (responseCount <= static_cast<int>(data.answers_.GetSize()))
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309 {
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310 // There are pending results that are still to be sent
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311 response->DimseStatus = STATUS_Pending;
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312 *responseIdentifiers = data.answers_.ExtractDcmDataset(responseCount - 1);
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313 }
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314 else if (data.answers_.IsComplete())
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315 {
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316 // Success: All the results have been sent
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317 response->DimseStatus = STATUS_Success;
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318 *responseIdentifiers = NULL;
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319 }
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320 else
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321 {
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322 // Success, but the results were too numerous and had to be cropped
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323 LOG(WARNING) << "Too many results for an incoming C-FIND query";
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324 response->DimseStatus = STATUS_FIND_Cancel_MatchingTerminatedDueToCancelRequest;
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325 *responseIdentifiers = NULL;
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326 }
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327 }
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328 }
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329
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330
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331 OFCondition Internals::findScp(T_ASC_Association * assoc,
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332 T_DIMSE_Message * msg,
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333 T_ASC_PresentationContextID presID,
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334 DicomServer::IRemoteModalities& modalities,
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335 IFindRequestHandler* findHandler,
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336 IWorklistRequestHandler* worklistHandler,
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337 const std::string& remoteIp,
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338 const std::string& remoteAet,
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339 const std::string& calledAet,
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340 int timeout)
0
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341 {
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342 FindScpData data;
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343 data.modalities_ = &modalities;
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344 data.findHandler_ = findHandler;
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345 data.worklistHandler_ = worklistHandler;
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346 data.lastRequest_ = NULL;
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347 data.remoteIp_ = &remoteIp;
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348 data.remoteAet_ = &remoteAet;
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349 data.calledAet_ = &calledAet;
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350
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351 OFCondition cond = DIMSE_findProvider(assoc, presID, &msg->msg.CFindRQ,
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352 FindScpCallback, &data,
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353 /*opt_blockMode*/ (timeout ? DIMSE_NONBLOCKING : DIMSE_BLOCKING),
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354 /*opt_dimse_timeout*/ timeout);
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355
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356 // if some error occured, dump corresponding information and remove the outfile if necessary
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357 if (cond.bad())
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358 {
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359 OFString temp_str;
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360 LOG(ERROR) << "Find SCP Failed: " << cond.text();
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361 }
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362
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363 return cond;
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364 }
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365 }