AssociationHandler.java

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
 * Portions created by the Initial Developer are Copyright (C) 2013
 * the Initial Developer. All Rights Reserved.
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 * See @authors listed below
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package org.dcm4che3.net;

import java.io.IOException;

import org.dcm4che3.data.UID;
import org.dcm4che3.net.pdu.AAssociateAC;
import org.dcm4che3.net.pdu.AAssociateRJ;
import org.dcm4che3.net.pdu.AAssociateRQ;
import org.dcm4che3.net.pdu.PresentationContext;
import org.dcm4che3.net.pdu.UserIdentityAC;

/**
 * @author Gunter Zeilinger <gunterze@gmail.com>
 *
 */
public class AssociationHandler {

    private UserIdentityNegotiator userIdNegotiator;

    public final UserIdentityNegotiator getUserIdNegotiator() {
        return userIdNegotiator;
    }

    public final void setUserIdNegotiator(UserIdentityNegotiator userIdNegotiator) {
        this.userIdNegotiator = userIdNegotiator;
    }

    protected AAssociateAC negotiate(Association as, AAssociateRQ rq)
            throws IOException {
        if ((rq.getProtocolVersion() & 1) == 0)
            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
                    AAssociateRJ.SOURCE_SERVICE_PROVIDER_ACSE,
                    AAssociateRJ.REASON_PROTOCOL_VERSION_NOT_SUPPORTED);
        if (!rq.getApplicationContext().equals(
                UID.DICOMApplicationContextName))
            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
                    AAssociateRJ.SOURCE_SERVICE_USER,
                    AAssociateRJ.REASON_APP_CTX_NAME_NOT_SUPPORTED);
        ApplicationEntity ae = as.getApplicationEntity();
        if (ae == null || !ae.getConnections().contains(as.getConnection())
                || !ae.isInstalled() || !ae.isAssociationAcceptor())
            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
                    AAssociateRJ.SOURCE_SERVICE_USER,
                    AAssociateRJ.REASON_CALLED_AET_NOT_RECOGNIZED);
        if (!ae.isAcceptedCallingAETitle(rq.getCallingAET()))
            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_PERMANENT,
                    AAssociateRJ.SOURCE_SERVICE_USER,
                    AAssociateRJ.REASON_CALLING_AET_NOT_RECOGNIZED);
        UserIdentityAC userIdentity = getUserIdNegotiator() != null
                ? getUserIdNegotiator().negotiate(as, rq.getUserIdentityRQ())
                : null;
        if (ae.getDevice().isLimitOfOpenAssociationsExceeded())
            throw new AAssociateRJ(AAssociateRJ.RESULT_REJECTED_TRANSIENT,
                    AAssociateRJ.SOURCE_SERVICE_PROVIDER_PRES,
                    AAssociateRJ.REASON_LOCAL_LIMIT_EXCEEDED);
        return makeAAssociateAC(as, rq, userIdentity);
    }

    protected AAssociateAC makeAAssociateAC(Association as, AAssociateRQ rq,
            UserIdentityAC userIdentity) throws IOException {
        AAssociateAC ac = new AAssociateAC();
        ac.setCalledAET(rq.getCalledAET());
        ac.setCallingAET(rq.getCallingAET());
        Connection conn = as.getConnection();
        ac.setMaxPDULength(conn.getReceivePDULength());
        ac.setMaxOpsInvoked(Association.minZeroAsMax(rq.getMaxOpsInvoked(),
                conn.getMaxOpsPerformed()));
        ac.setMaxOpsPerformed(Association.minZeroAsMax(rq.getMaxOpsPerformed(),
                conn.getMaxOpsInvoked()));
        ac.setUserIdentityAC(userIdentity);
        ApplicationEntity ae = as.getApplicationEntity();
        for (PresentationContext rqpc : rq.getPresentationContexts())
            ac.addPresentationContext(ae.negotiate(rq, ac, rqpc));
        return ac;
    }

    protected void onClose(Association as) {
        DimseRQHandler tmp = as.getApplicationEntity().getDimseRQHandler();
        if (tmp != null)
            tmp.onClose(as);
    }

}