001/* ***** BEGIN LICENSE BLOCK *****
002 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
003 *
004 * The contents of this file are subject to the Mozilla Public License Version
005 * 1.1 (the "License"); you may not use this file except in compliance with
006 * the License. You may obtain a copy of the License at
007 * http://www.mozilla.org/MPL/
008 *
009 * Software distributed under the License is distributed on an "AS IS" basis,
010 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
011 * for the specific language governing rights and limitations under the
012 * License.
013 *
014 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
015 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
016 *
017 * The Initial Developer of the Original Code is
018 * Agfa Healthcare.
019 * Portions created by the Initial Developer are Copyright (C) 2013
020 * the Initial Developer. All Rights Reserved.
021 *
022 * Contributor(s):
023 * See @authors listed below
024 *
025 * Alternatively, the contents of this file may be used under the terms of
026 * either the GNU General Public License Version 2 or later (the "GPL"), or
027 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
028 * in which case the provisions of the GPL or the LGPL are applicable instead
029 * of those above. If you wish to allow use of your version of this file only
030 * under the terms of either the GPL or the LGPL, and not to allow others to
031 * use your version of this file under the terms of the MPL, indicate your
032 * decision by deleting the provisions above and replace them with the notice
033 * and other provisions required by the GPL or the LGPL. If you do not delete
034 * the provisions above, a recipient may use your version of this file under
035 * the terms of any one of the MPL, the GPL or the LGPL.
036 *
037 * ***** END LICENSE BLOCK ***** */
038
039package org.dcm4che3.net;
040
041import java.io.IOException;
042
043import org.dcm4che3.data.UID;
044import org.dcm4che3.net.pdu.AAssociateAC;
045import org.dcm4che3.net.pdu.AAssociateRJ;
046import org.dcm4che3.net.pdu.AAssociateRQ;
047import org.dcm4che3.net.pdu.PresentationContext;
048import org.dcm4che3.net.pdu.UserIdentityAC;
049
050/**
051 * @author Gunter Zeilinger <gunterze@gmail.com>
052 *
053 */
054public class AssociationHandler {
055
056    private UserIdentityNegotiator userIdNegotiator;
057
058    public final UserIdentityNegotiator getUserIdNegotiator() {
059        return userIdNegotiator;
060    }
061
062    public final void setUserIdNegotiator(UserIdentityNegotiator userIdNegotiator) {
063        this.userIdNegotiator = userIdNegotiator;
064    }
065
066    protected AAssociateAC negotiate(Association as, AAssociateRQ rq)
067            throws IOException {
068        if ((rq.getProtocolVersion() & 1) == 0)
069            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
070                    AAssociateRJ.SOURCE_SERVICE_PROVIDER_ACSE,
071                    AAssociateRJ.REASON_PROTOCOL_VERSION_NOT_SUPPORTED);
072        if (!rq.getApplicationContext().equals(
073                UID.DICOMApplicationContextName))
074            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
075                    AAssociateRJ.SOURCE_SERVICE_USER,
076                    AAssociateRJ.REASON_APP_CTX_NAME_NOT_SUPPORTED);
077        ApplicationEntity ae = as.getApplicationEntity();
078        if (ae == null || !ae.getConnections().contains(as.getConnection())
079                || !ae.isInstalled() || !ae.isAssociationAcceptor())
080            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
081                    AAssociateRJ.SOURCE_SERVICE_USER,
082                    AAssociateRJ.REASON_CALLED_AET_NOT_RECOGNIZED);
083        if (!ae.isAcceptedCallingAETitle(rq.getCallingAET()))
084            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
085                    AAssociateRJ.SOURCE_SERVICE_USER,
086                    AAssociateRJ.REASON_CALLING_AET_NOT_RECOGNIZED);
087        UserIdentityAC userIdentity = getUserIdNegotiator() != null
088                ? getUserIdNegotiator().negotiate(as, rq.getUserIdentityRQ())
089                : null;
090        if (ae.getDevice().isLimitOfOpenAssociationsExceeded())
091            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_TRANSIENT,
092                    AAssociateRJ.SOURCE_SERVICE_PROVIDER_PRES,
093                    AAssociateRJ.REASON_LOCAL_LIMIT_EXCEEDED);
094        return makeAAssociateAC(as, rq, userIdentity);
095    }
096
097    protected AAssociateAC makeAAssociateAC(Association as, AAssociateRQ rq,
098            UserIdentityAC userIdentity) throws IOException {
099        AAssociateAC ac = new AAssociateAC();
100        ac.setCalledAET(rq.getCalledAET());
101        ac.setCallingAET(rq.getCallingAET());
102        Connection conn = as.getConnection();
103        ac.setMaxPDULength(conn.getReceivePDULength());
104        ac.setMaxOpsInvoked(Association.minZeroAsMax(rq.getMaxOpsInvoked(),
105                conn.getMaxOpsPerformed()));
106        ac.setMaxOpsPerformed(Association.minZeroAsMax(rq.getMaxOpsPerformed(),
107                conn.getMaxOpsInvoked()));
108        ac.setUserIdentityAC(userIdentity);
109        ApplicationEntity ae = as.getApplicationEntity();
110        for (PresentationContext rqpc : rq.getPresentationContexts())
111            ac.addPresentationContext(ae.negotiate(rq, ac, rqpc));
112        return ac;
113    }
114
115    protected void onClose(Association as) {
116        DimseRQHandler tmp = as.getApplicationEntity().getDimseRQHandler();
117        if (tmp != null)
118            tmp.onClose(as);
119    }
120
121}