public void Write_AeWithNonAsciiCharacters_ShouldBeAsciified()
{
var notExpected = "GÖTEBORG";
var request = new AAssociateRQ(new DicomAssociation("MALMÖ", notExpected));
var writePdu = request.Write();
RawPDU readPdu;
using (var stream = new MemoryStream())
{
writePdu.WritePDU(stream);
var length = (int)writePdu.Length;
var buffer = new byte[length];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(buffer, 0, length);
readPdu = new RawPDU(buffer);
}
readPdu.Reset();
readPdu.SkipBytes("Unknown", 10);
var actual = readPdu.ReadString("Called AE", 16);
Assert.NotEqual(notExpected, actual);
}
/// <summary>
/// Writes A-ABORT to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
RawPDU pdu = new RawPDU((byte)0x07);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Source", (byte)_s);
pdu.Write("Reason", (byte)_r);
return(pdu);
}
/// <summary>
/// Writes PDV to PDU buffer
/// </summary>
/// <param name="pdu">PDU buffer</param>
public void Write(RawPDU pdu)
{
byte mch = (byte)((_last ? 2 : 0) + (_command ? 1 : 0));
pdu.MarkLength32("PDV-Length");
pdu.Write("Presentation Context ID", (byte)_pcid);
pdu.Write("Message Control Header", (byte)mch);
pdu.Write("PDV Value", _value);
pdu.WriteLength32();
}
/// <summary>
/// Writes P-DATA-TF to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
RawPDU pdu = new RawPDU((byte)0x04);
foreach (PDV pdv in _pdvs)
{
pdv.Write(pdu);
}
return(pdu);
}
/// <summary>
/// Writes P-DATA-TF to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
var pdu = new RawPDU(0x04);
foreach (var pdv in _pdvs)
{
pdv.Write(pdu);
}
return(pdu);
}
/// <summary>
/// Writes A-ASSOCIATE-RJ to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
/// <remarks>When writing the rejection reason to the <see cref="RawPDU"/> object, the <see cref="DicomRejectSource"/>
/// specification in the underlying value is masked out, to ensure that the reason code matches the codes specified
/// in Table 9-21 of DICOM Standard PS 3.8.</remarks>
public RawPDU Write()
{
var pdu = new RawPDU(0x03);
pdu.Write("Reserved", 0x00);
pdu.Write("Result", (byte)_rt);
pdu.Write("Source", (byte)_so);
pdu.Write("Reason", (byte)((byte)_rn & 0xf));
return(pdu);
}
/// <summary>
/// Writes A-ASSOCIATE-RJ to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
RawPDU pdu = new RawPDU((byte)0x03);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Result", (byte)_rt);
pdu.Write("Source", (byte)_so);
pdu.Write("Reason", (byte)_rn);
return(pdu);
}
public void AssociateRJ_Read_ReasonGivenByContext(byte[] buffer, AAssociateRJ dummy, string expected)
{
using (var raw = new RawPDU(buffer))
{
var reject = new AAssociateRJ();
reject.Read(raw);
var actual = reject.Reason.ToString();
Assert.Equal(expected, actual);
}
}
public void Save_ToNonExistingDirectory_Succeeds()
{
var path = @".\Test Data\PDU Test";
var name = Path.Combine(path, "assoc.pdu");
if (Directory.Exists(path)) Directory.Delete(path, true);
var pdu = new RawPDU(0x01);
pdu.Save(name);
Assert.True(File.Exists(name));
}
/// <summary>
/// Reads PDV from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public uint Read(RawPDU raw)
{
uint len = raw.ReadUInt32("PDV-Length");
_pcid = raw.ReadByte("Presentation Context ID");
byte mch = raw.ReadByte("Message Control Header");
_value = raw.ReadBytes("PDV Value", (int)len - 2);
_command = (mch & 0x01) != 0;
_last = (mch & 0x02) != 0;
return(len + 4);
}
/// <summary>
/// Reads P-DATA-TF from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
uint len = raw.Length - 6;
uint read = 0;
while (read < len)
{
PDV pdv = new PDV();
read += pdv.Read(raw);
_pdvs.Add(pdv);
}
}
private RawPDU ConvertWriteToReadPdu(RawPDU writePdu)
{
using (MemoryStream stream = new MemoryStream())
{
writePdu.WritePDU(stream);
int length = (int)stream.Length;
byte[] buffer = new byte[length];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(buffer, 0, length);
return(new RawPDU(buffer));
}
}
public void Save_ToNonExistingDirectory_Succeeds()
{
var path = @".\Test Data\PDU Test";
var name = Path.Combine(path, "assoc.pdu");
if (Directory.Exists(path))
{
Directory.Delete(path, true);
}
var pdu = new RawPDU(0x01);
pdu.Save(name);
Assert.True(File.Exists(name));
}
/// <summary>
/// Write PDU.
/// </summary>
/// <param name="pdu">PDU to write.</param>
public void Write(RawPDU pdu)
{
if (null != SubItem)
{
pdu.Write("Item-Type", (byte)0x56);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("SOP Class UID Length", (ushort)(SopClassUid.UID.Length));
pdu.Write("SOP Class UID", SopClassUid.UID);
SubItem.Write(pdu);
pdu.WriteLength16();
}
}
/// <summary>
/// Write PDU.
/// </summary>
/// <param name="pdu">PDU to write.</param>
public void Write(RawPDU pdu)
{
if (null != SubItem)
{
pdu.Write("Item-Type", (byte)0x56);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("SOP Class UID Length", (ushort)(SopClassUid.UID.Length));
pdu.Write("SOP Class UID", SopClassUid.UID);
SubItem.Write(pdu);
pdu.WriteLength16();
}
}
public void WriteReadAAssociateRQExtendedNegotiation()
{
DicomAssociation association = new DicomAssociation("testCalling", "testCalled");
association.ExtendedNegotiations.Add(
new DicomExtendedNegotiation(
DicomUID.StudyRootQueryRetrieveInformationModelFIND,
new RootQueryRetrieveInfoFind(1, 1, 1, 1, null)));
AAssociateRQ rq = new AAssociateRQ(association);
RawPDU writePdu = rq.Write();
RawPDU readPdu;
using (MemoryStream stream = new MemoryStream())
{
writePdu.WritePDU(stream);
int length = (int)stream.Length;
byte[] buffer = new byte[length];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(buffer, 0, length);
readPdu = new RawPDU(buffer);
}
DicomAssociation testAssociation = new DicomAssociation();
AAssociateRQ rq2 = new AAssociateRQ(testAssociation);
rq2.Read(readPdu);
Assert.True(testAssociation.ExtendedNegotiations.Count == 1);
Assert.True(
testAssociation.ExtendedNegotiations[0].SopClassUid
== DicomUID.StudyRootQueryRetrieveInformationModelFIND);
RootQueryRetrieveInfoFind info =
testAssociation.ExtendedNegotiations[0].SubItem as RootQueryRetrieveInfoFind;
Assert.True(null != info);
Assert.True(
(1 == info.DateTimeMatching) && (1 == info.FuzzySemanticMatching) && (1 == info.RelationalQueries) &&
(1 == info.TimezoneQueryAdjustment) && (false == info.EnhancedMultiFrameImageConversion.HasValue));
}
public void AssociateAC_Read_TransferSyntaxIdentifiedIfAccept(byte[] buffer, byte contextId,
DicomPresentationContextResult result, DicomTransferSyntax syntax)
{
var association = new DicomAssociation();
association.PresentationContexts.Add(
new DicomPresentationContext(contextId, DicomUID.Verification));
using (var raw = new RawPDU(buffer))
{
var accept = new AAssociateAC(association);
accept.Read(raw);
var actual = association.PresentationContexts[contextId];
Assert.Equal(result, actual.Result);
Assert.Equal(syntax, actual.AcceptedTransferSyntax);
}
}
private void WritePDU(bool last)
{
if (_pdu.PDVs.Count == 0 || ((CurrentPduSize() + 6) < _max && GetBufferLength() > 0))
{
CreatePDV();
}
if (_pdu.PDVs.Count > 0)
{
if (last)
{
_pdu.PDVs[_pdu.PDVs.Count - 1].IsLastFragment = true;
}
RawPDU raw = _pdu.Write();
raw.WritePDU(_network);
if (OnPduSent != null)
{
OnPduSent();
}
_pdu = new PDataTF();
}
}
public void WriteReadAAssociateRQExtendedNegotiation()
{
DicomAssociation association = new DicomAssociation("testCalling", "testCalled");
association.ExtendedNegotiations.Add(
new DicomExtendedNegotiation(
DicomUID.StudyRootQueryRetrieveInformationModelFIND,
new RootQueryRetrieveInfoFind(1, 1, 1, 1, null)));
AAssociateRQ rq = new AAssociateRQ(association);
RawPDU writePdu = rq.Write();
RawPDU readPdu;
using (MemoryStream stream = new MemoryStream())
{
writePdu.WritePDU(stream);
int length = (int)stream.Length;
byte[] buffer = new byte[length];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(buffer, 0, length);
readPdu = new RawPDU(buffer);
}
DicomAssociation testAssociation = new DicomAssociation();
AAssociateRQ rq2 = new AAssociateRQ(testAssociation);
rq2.Read(readPdu);
Assert.True(testAssociation.ExtendedNegotiations.Count == 1);
Assert.True(
testAssociation.ExtendedNegotiations[0].SopClassUid
== DicomUID.StudyRootQueryRetrieveInformationModelFIND);
RootQueryRetrieveInfoFind info =
testAssociation.ExtendedNegotiations[0].SubItem as RootQueryRetrieveInfoFind;
Assert.True(null != info);
Assert.True(
(1 == info.DateTimeMatching) && (1 == info.FuzzySemanticMatching) && (1 == info.RelationalQueries)
&& (1 == info.TimezoneQueryAdjustment) && (false == info.EnhancedMultiFrameImageConversion.HasValue));
}
/// <summary>
/// Factory method for creating <see cref="DicomExtendedNegotiation"/> instances.
/// </summary>
/// <param name="raw">Raw PDU.</param>
/// <param name="length">Length.</param>
/// <returns>A new <see cref="DicomExtendedNegotiation"/> instance.</returns>
public static DicomExtendedNegotiation Create(RawPDU raw, ushort length)
{
var uidLen = raw.ReadUInt16("SOP Class UID Length");
var uidStr = raw.ReadString("SOP Class UID", uidLen);
var uid = DicomUID.Parse(uidStr);
IExtendedNegotiationSubItem subItem = null;
var subItemSize = 0;
var remaining = length - uidLen - 2;
if (subItemCreators.ContainsKey(uid))
{
subItem = subItemCreators[uid](raw, remaining, out subItemSize);
}
remaining -= subItemSize;
if (remaining > 0)
{
raw.SkipBytes("Unread bytes", remaining);
}
return(new DicomExtendedNegotiation(uid, subItem));
}
/// <summary>
/// Writes A-ABORT to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write() {
RawPDU pdu = new RawPDU((byte)0x07);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Source", (byte)_s);
pdu.Write("Reason", (byte)_r);
return pdu;
}
/// <summary>
/// Writes A-RELEASE-RP to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write() {
RawPDU pdu = new RawPDU((byte)0x06);
pdu.Write("Reserved", (uint)0x00000000);
return pdu;
}
/// <summary>
/// Writes A-ASSOCIATE-RJ to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write() {
RawPDU pdu = new RawPDU((byte)0x03);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Result", (byte)_rt);
pdu.Write("Source", (byte)_so);
pdu.Write("Reason", (byte)_rn);
return pdu;
}
/// <summary>
/// Writes A-ASSOCIATE-AC to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write() {
RawPDU pdu = new RawPDU((byte)0x02);
pdu.Write("Version", (ushort)0x0001);
pdu.Write("Reserved", 0x00, 2);
pdu.Write("Called AE", _assoc.CalledAE, 16, ' ');
pdu.Write("Calling AE", _assoc.CallingAE, 16, ' ');
pdu.Write("Reserved", 0x00, 32);
// Application Context
pdu.Write("Item-Type", (byte)0x10);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Application Context Name", DicomUID.DICOMApplicationContextName.UID);
pdu.WriteLength16();
foreach (var pc in _assoc.PresentationContexts) {
// Presentation Context
pdu.Write("Item-Type", (byte)0x21);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Presentation Context ID", (byte)pc.ID);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Result", (byte)pc.Result);
pdu.Write("Reserved", (byte)0x00);
// Transfer Syntax
pdu.Write("Item-Type", (byte)0x40);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Transfer Syntax UID", pc.AcceptedTransferSyntax.UID.UID);
pdu.WriteLength16();
pdu.WriteLength16();
}
// User Data Fields
pdu.Write("Item-Type", (byte)0x50);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
// Maximum PDU
pdu.Write("Item-Type", (byte)0x51);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Max PDU Length", (uint)_assoc.MaximumPDULength);
// Implementation Class UID
pdu.Write("Item-Type", (byte)0x52);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Class UID", DicomImplementation.ClassUID.UID);
pdu.WriteLength16();
// Asynchronous Operations Negotiation
if (_assoc.MaxAsyncOpsInvoked != 1 || _assoc.MaxAsyncOpsPerformed != 1) {
pdu.Write("Item-Type", (byte)0x53);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Asynchronous Operations Invoked", (ushort)_assoc.MaxAsyncOpsInvoked);
pdu.Write("Asynchronous Operations Performed", (ushort)_assoc.MaxAsyncOpsPerformed);
}
// Implementation Version
pdu.Write("Item-Type", (byte)0x55);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Version", DicomImplementation.Version);
pdu.WriteLength16();
pdu.WriteLength16();
return pdu;
}
/// <summary>
/// Reads A-ASSOCIATE-AC from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
uint l = raw.Length;
ushort c = 0;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 32);
l -= 68;
while (l > 0) {
byte type = raw.ReadByte("Item-Type");
l -= 1;
if (type == 0x10) {
// Application Context
raw.SkipBytes("Reserved", 1);
c = raw.ReadUInt16("Item-Length");
raw.SkipBytes("Value", (int)c);
l -= 3 + (uint)c;
} else
if (type == 0x21) {
// Presentation Context
raw.ReadByte("Reserved");
ushort pl = raw.ReadUInt16("Presentation Context Item-Length");
byte id = raw.ReadByte("Presentation Context ID");
raw.ReadByte("Reserved");
byte res = raw.ReadByte("Presentation Context Result/Reason");
raw.ReadByte("Reserved");
l -= (uint)pl + 3;
pl -= 4;
// Presentation Context Transfer Syntax
raw.ReadByte("Presentation Context Item-Type (0x40)");
raw.ReadByte("Reserved");
ushort tl = raw.ReadUInt16("Presentation Context Item-Length");
string tx = raw.ReadString("Presentation Context Syntax UID", tl);
pl -= (ushort)(tl + 4);
_assoc.SetPresentationContextResult(id, (DcmPresContextResult)res);
_assoc.SetAcceptedTransferSyntax(id, DicomTransferSyntax.Lookup(tx));
} else
if (type == 0x50) {
// User Information
raw.ReadByte("Reserved");
ushort il = raw.ReadUInt16("User Information Item-Length");
l -= (uint)(il + 3);
while (il > 0) {
byte ut = raw.ReadByte("User Item-Type");
raw.ReadByte("Reserved");
ushort ul = raw.ReadUInt16("User Item-Length");
il -= (ushort)(ul + 4);
if (ut == 0x51) {
_assoc.MaximumPduLength = raw.ReadUInt32("Max PDU Length");
} else if (ut == 0x52) {
_assoc.ImplementationClass = DicomUID.Lookup(raw.ReadString("Implementation Class UID", ul));
} else if (ut == 0x53) {
_assoc.AsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.AsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
} else if (ut == 0x55) {
_assoc.ImplementationVersion = raw.ReadString("Implementation Version", ul);
} else {
raw.SkipBytes("User Item Value", (int)ul);
}
}
}
else {
raw.SkipBytes("Reserved", 1);
ushort il = raw.ReadUInt16("User Item-Length");
raw.SkipBytes("Unknown User Item", il);
l -= (uint)(il + 3);
}
}
}
/// <summary>
/// Reads A-ASSOCIATE-RQ from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
uint l = raw.Length - 6;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
_assoc.CalledAE = raw.ReadString("Called AE", 16);
_assoc.CallingAE = raw.ReadString("Calling AE", 16);
raw.SkipBytes("Reserved", 32);
l -= 2 + 2 + 16 + 16 + 32;
while (l > 0)
{
byte type = raw.ReadByte("Item-Type");
raw.SkipBytes("Reserved", 1);
ushort il = raw.ReadUInt16("Item-Length");
l -= 4 + (uint)il;
if (type == 0x10)
{
// Application Context
raw.SkipBytes("Application Context", il);
}
else if (type == 0x20)
{
// Presentation Context
byte id = raw.ReadByte("Presentation Context ID");
raw.SkipBytes("Reserved", 3);
il -= 4;
while (il > 0)
{
byte pt = raw.ReadByte("Presentation Context Item-Type");
raw.SkipBytes("Reserved", 1);
ushort pl = raw.ReadUInt16("Presentation Context Item-Length");
string sx = raw.ReadString("Presentation Context Syntax UID", pl);
if (pt == 0x30)
{
var pc = new DicomPresentationContext(id, DicomUID.Parse(sx));
_assoc.PresentationContexts.Add(pc);
}
else if (pt == 0x40)
{
var pc = _assoc.PresentationContexts[id];
pc.AddTransferSyntax(DicomTransferSyntax.Parse(sx));
}
il -= (ushort)(4 + pl);
}
}
else if (type == 0x50)
{
// User Information
while (il > 0)
{
byte ut = raw.ReadByte("User Information Item-Type");
raw.SkipBytes("Reserved", 1);
ushort ul = raw.ReadUInt16("User Information Item-Length");
il -= (ushort)(4 + ul);
if (ut == 0x51)
{
_assoc.MaximumPDULength = raw.ReadUInt32("Max PDU Length");
}
else if (ut == 0x52)
{
_assoc.RemoteImplementationClassUID =
new DicomUID(
raw.ReadString("Implementation Class UID", ul),
"Implementation Class UID",
DicomUidType.Unknown);
}
else if (ut == 0x55)
{
_assoc.RemoteImplementationVersion = raw.ReadString("Implementation Version", ul);
}
else if (ut == 0x53)
{
_assoc.MaxAsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.MaxAsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
}
else if (ut == 0x54)
{
var asul = raw.ReadUInt16("Abstract Syntax Item-Length");
var syntax = raw.ReadString("Abstract Syntax UID", asul);
var userRole = raw.ReadByte("SCU role");
var providerRole = raw.ReadByte("SCP role");
var pc =
_assoc.PresentationContexts.FirstOrDefault(
context => context.AbstractSyntax.UID.Equals(syntax));
if (pc != null)
{
pc.UserRole = userRole == 0x01;
pc.ProviderRole = providerRole == 0x01;
}
}
else if (ut == 0x56)
{
_assoc.ExtendedNegotiations.Add(DicomExtendedNegotiation.Create(raw, ul));
}
else
{
raw.SkipBytes("Unhandled User Item", ul);
}
}
}
}
}
/// <summary>
/// 扩展，向RawPDU中写入UserIdentity身份信息
/// </summary>
/// <param name="userIdentity"></param>
/// <returns></returns>
public RawPDU WriteAddingUserIdentity(UserIdentity userIdentity)
{
RawPDU pdu = new RawPDU((byte)0x01);
pdu.Write("Version", (ushort)0x0001);
pdu.Write("Reserved", 0x00, 2);
pdu.Write("Called AE", _assoc.CalledAE, 16, ' ');
pdu.Write("Calling AE", _assoc.CallingAE, 16, ' ');
pdu.Write("Reserved", 0x00, 32);
// Application Context
pdu.Write("Item-Type", (byte)0x10);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Application Context Name", DicomUID.DICOMApplicationContextName.UID);
pdu.WriteLength16();
foreach (DcmPresContext pc in _assoc.GetPresentationContexts())
{
// Presentation Context
pdu.Write("Item-Type", (byte)0x20);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Presentation Context ID", (byte)pc.ID);
pdu.Write("Reserved", (byte)0x00, 3);
// Abstract Syntax
pdu.Write("Item-Type", (byte)0x30);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Abstract Syntax UID", pc.AbstractSyntax.UID);
pdu.WriteLength16();
// Transfer Syntax
foreach (DicomTransferSyntax ts in pc.GetTransfers())
{
pdu.Write("Item-Type", (byte)0x40);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Transfer Syntax UID", ts.UID.UID);
pdu.WriteLength16();
}
pdu.WriteLength16();
}
// User Data Fields
pdu.Write("Item-Type", (byte)0x50);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
// Maximum PDU
pdu.Write("Item-Type", (byte)0x51);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Max PDU Length", (uint)_assoc.MaximumPduLength);
// Implementation Class UID
pdu.Write("Item-Type", (byte)0x52);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Class UID", Implementation.ClassUID.UID);
pdu.WriteLength16();
// Asynchronous Operations Negotiation
if (_assoc.NegotiateAsyncOps)
{
pdu.Write("Item-Type", (byte)0x53);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Asynchronous Operations Invoked", (ushort)_assoc.AsyncOpsInvoked);
pdu.Write("Asynchronous Operations Performed", (ushort)_assoc.AsyncOpsPerformed);
}
// Implementation Version
pdu.Write("Item-Type", (byte)0x55);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Version", Implementation.Version);
pdu.WriteLength16();
//User Indentity
//http://medical.nema.org/medical/dicom/current/output/html/part07.html#sect_D.3.3.7
pdu.Write("Item-Type", (byte)0x58);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("User Identity Type", (byte)userIdentity.UserIdentityType);
pdu.Write("Positive Response Requested", (userIdentity.bPositiveResponseRequested?(byte)0x01:(byte)0x00));
pdu.Write("Primary Field Length", (ushort)userIdentity.UserName.Length);
pdu.Write("Primary Field", userIdentity.UserName);
pdu.Write("Secondary Field Length", (ushort)userIdentity.PassCode.Length);
pdu.Write("Secondary Field", userIdentity.PassCode);
pdu.WriteLength16();
//zssure:end.
pdu.WriteLength16();
return(pdu);
}
/// <summary>
/// Writes A-ASSOCIATE-RQ to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
RawPDU pdu = new RawPDU((byte)0x01);
pdu.Write("Version", (ushort)0x0001);
pdu.Write("Reserved", 0x00, 2);
pdu.Write("Called AE", _assoc.CalledAE, 16, ' ');
pdu.Write("Calling AE", _assoc.CallingAE, 16, ' ');
pdu.Write("Reserved", 0x00, 32);
// Application Context
pdu.Write("Item-Type", (byte)0x10);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Application Context Name", DicomUID.DICOMApplicationContextName.UID);
pdu.WriteLength16();
foreach (var pc in _assoc.PresentationContexts)
{
// Presentation Context
pdu.Write("Item-Type", (byte)0x20);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Presentation Context ID", (byte)pc.ID);
pdu.Write("Reserved", (byte)0x00, 3);
// Abstract Syntax
pdu.Write("Item-Type", (byte)0x30);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Abstract Syntax UID", pc.AbstractSyntax.UID);
pdu.WriteLength16();
// Transfer Syntax
foreach (DicomTransferSyntax ts in pc.GetTransferSyntaxes())
{
pdu.Write("Item-Type", (byte)0x40);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Transfer Syntax UID", ts.UID.UID);
pdu.WriteLength16();
}
pdu.WriteLength16();
}
// User Data Fields
pdu.Write("Item-Type", (byte)0x50);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
// Maximum PDU
pdu.Write("Item-Type", (byte)0x51);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Max PDU Length", (uint)_assoc.MaximumPDULength);
// Implementation Class UID
pdu.Write("Item-Type", (byte)0x52);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Class UID", DicomImplementation.ClassUID.UID);
pdu.WriteLength16();
// Asynchronous Operations Negotiation
if (_assoc.MaxAsyncOpsInvoked != 1 || _assoc.MaxAsyncOpsPerformed != 1)
{
pdu.Write("Item-Type", (byte)0x53);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Asynchronous Operations Invoked", (ushort)_assoc.MaxAsyncOpsInvoked);
pdu.Write("Asynchronous Operations Performed", (ushort)_assoc.MaxAsyncOpsPerformed);
}
foreach (var pc in _assoc.PresentationContexts)
{
if (pc.UserRole.HasValue || pc.ProviderRole.HasValue)
{
pdu.Write("Item-Type", (byte)0x54);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.MarkLength16("UID-Length");
pdu.Write("Abstract Syntax UID", pc.AbstractSyntax.UID);
pdu.WriteLength16();
pdu.Write("SCU Role", pc.UserRole.GetValueOrDefault() ? (byte)1 : (byte)0);
pdu.Write("SCP Role", pc.ProviderRole.GetValueOrDefault() ? (byte)1 : (byte)0);
pdu.WriteLength16();
}
}
// Implementation Version
pdu.Write("Item-Type", (byte)0x55);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Version", DicomImplementation.Version);
pdu.WriteLength16();
foreach (DicomExtendedNegotiation exNeg in _assoc.ExtendedNegotiations)
{
exNeg.Write(pdu);
}
pdu.WriteLength16();
return pdu;
}
/// <summary>
/// Reads P-DATA-TF from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw) {
uint len = raw.Length - 6;
uint read = 0;
while (read < len) {
PDV pdv = new PDV();
read += pdv.Read(raw);
_pdvs.Add(pdv);
}
}
/// <summary>
/// Writes P-DATA-TF to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write() {
RawPDU pdu = new RawPDU((byte)0x04);
foreach (PDV pdv in _pdvs) {
pdv.Write(pdu);
}
return pdu;
}
/// <summary>
/// Reads PDV from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public uint Read(RawPDU raw) {
uint len = raw.ReadUInt32("PDV-Length");
_pcid = raw.ReadByte("Presentation Context ID");
byte mch = raw.ReadByte("Message Control Header");
_value = raw.ReadBytes("PDV Value", (int)len - 2);
_command = (mch & 0x01) != 0;
_last = (mch & 0x02) != 0;
return len + 4;
}
/// <summary>
/// Writes PDV to PDU buffer
/// </summary>
/// <param name="pdu">PDU buffer</param>
public void Write(RawPDU pdu) {
byte mch = (byte)((_last ? 2 : 0) + (_command ? 1 : 0));
pdu.MarkLength32("PDV-Length");
pdu.Write("Presentation Context ID", (byte)_pcid);
pdu.Write("Message Control Header", (byte)mch);
pdu.Write("PDV Value", _value);
pdu.WriteLength32();
}
/// <summary>
/// Writes A-ASSOCIATE-RQ to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
RawPDU pdu = new RawPDU((byte)0x01);
pdu.Write("Version", (ushort)0x0001);
pdu.Write("Reserved", 0x00, 2);
pdu.Write("Called AE", _assoc.CalledAE, 16, ' ');
pdu.Write("Calling AE", _assoc.CallingAE, 16, ' ');
pdu.Write("Reserved", 0x00, 32);
// Application Context
pdu.Write("Item-Type", (byte)0x10);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Application Context Name", DicomUID.DICOMApplicationContextName.UID);
pdu.WriteLength16();
foreach (DcmPresContext pc in _assoc.GetPresentationContexts())
{
// Presentation Context
pdu.Write("Item-Type", (byte)0x20);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Presentation Context ID", (byte)pc.ID);
pdu.Write("Reserved", (byte)0x00, 3);
// Abstract Syntax
pdu.Write("Item-Type", (byte)0x30);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Abstract Syntax UID", pc.AbstractSyntax.UID);
pdu.WriteLength16();
// Transfer Syntax
foreach (DicomTransferSyntax ts in pc.GetTransfers())
{
pdu.Write("Item-Type", (byte)0x40);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Transfer Syntax UID", ts.UID.UID);
pdu.WriteLength16();
}
pdu.WriteLength16();
}
// User Data Fields
pdu.Write("Item-Type", (byte)0x50);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
// Maximum PDU
pdu.Write("Item-Type", (byte)0x51);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Max PDU Length", (uint)_assoc.MaximumPduLength);
// Implementation Class UID
pdu.Write("Item-Type", (byte)0x52);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Class UID", Implementation.ClassUID.UID);
pdu.WriteLength16();
// Asynchronous Operations Negotiation
if (_assoc.NegotiateAsyncOps)
{
pdu.Write("Item-Type", (byte)0x53);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Asynchronous Operations Invoked", (ushort)_assoc.AsyncOpsInvoked);
pdu.Write("Asynchronous Operations Performed", (ushort)_assoc.AsyncOpsPerformed);
}
// Implementation Version
pdu.Write("Item-Type", (byte)0x55);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Version", Implementation.Version);
pdu.WriteLength16();
pdu.WriteLength16();
return(pdu);
}
/// <summary>
/// Reads A-ASSOCIATE-RQ from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw) {
uint l = raw.Length - 6;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
_assoc.CalledAE = raw.ReadString("Called AE", 16);
_assoc.CallingAE = raw.ReadString("Calling AE", 16);
raw.SkipBytes("Reserved", 32);
l -= 2 + 2 + 16 + 16 + 32;
while (l > 0) {
byte type = raw.ReadByte("Item-Type");
raw.SkipBytes("Reserved", 1);
ushort il = raw.ReadUInt16("Item-Length");
l -= 4 + (uint)il;
if (type == 0x10) {
// Application Context
raw.SkipBytes("Application Context", il);
} else
if (type == 0x20) {
// Presentation Context
byte id = raw.ReadByte("Presentation Context ID");
raw.SkipBytes("Reserved", 3);
il -= 4;
while (il > 0) {
byte pt = raw.ReadByte("Presentation Context Item-Type");
raw.SkipBytes("Reserved", 1);
ushort pl = raw.ReadUInt16("Presentation Context Item-Length");
string sx = raw.ReadString("Presentation Context Syntax UID", pl);
if (pt == 0x30) {
var pc = new DicomPresentationContext(id, DicomUID.Parse(sx));
_assoc.PresentationContexts.Add(pc);
} else if (pt == 0x40) {
var pc = _assoc.PresentationContexts[id];
pc.AddTransferSyntax(DicomTransferSyntax.Parse(sx));
}
il -= (ushort)(4 + pl);
}
} else
if (type == 0x50) {
// User Information
while (il > 0) {
byte ut = raw.ReadByte("User Information Item-Type");
raw.SkipBytes("Reserved", 1);
ushort ul = raw.ReadUInt16("User Information Item-Length");
il -= (ushort)(4 + ul);
if (ut == 0x51) {
_assoc.MaximumPDULength = raw.ReadUInt32("Max PDU Length");
} else if (ut == 0x52) {
_assoc.RemoteImplemetationClassUID = new DicomUID(raw.ReadString("Implementation Class UID", ul), "Implementation Class UID", DicomUidType.Unknown);
} else if (ut == 0x55) {
_assoc.RemoteImplementationVersion = raw.ReadString("Implementation Version", ul);
} else if (ut == 0x53) {
_assoc.MaxAsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.MaxAsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
} else if (ut == 0x54) {
raw.SkipBytes("SCU/SCP Role Selection", ul);
/*
ushort rsul = raw.ReadUInt16();
if ((rsul + 4) != ul) {
throw new DicomNetworkException("SCU/SCP role selection length (" + ul + " bytes) does not match uid length (" + rsul + " + 4 bytes)");
}
raw.ReadChars(rsul); // Abstract Syntax
raw.ReadByte(); // SCU role
raw.ReadByte(); // SCP role
*/
} else {
//Debug.Log.Error("Unhandled user item: 0x{0:x2} ({1} + 4 bytes)", ut, ul);
raw.SkipBytes("Unhandled User Item", ul);
}
}
}
}
}
private void EndReadPDU(IAsyncResult result)
{
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0)
{
// disconnected
CloseConnection(0);
return;
}
_readLength -= count;
if (_readLength > 0)
{
_network.BeginRead(buffer, buffer.Length - _readLength, _readLength, EndReadPDU, buffer);
return;
}
var raw = new RawPDU(buffer);
switch (raw.Type)
{
case 0x01: {
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
if (Options.UseRemoteAEForLogName)
{
Logger = LogManager.Default.GetLogger(LogID);
}
Logger.Info("{0} <- Association request:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
}
break;
}
case 0x02: {
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Info("{0} <- Association accept:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
}
break;
}
case 0x03: {
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Info("{0} <- Association reject [result: {1}; source: {2}; reason: {3}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationReject(pdu.Result, pdu.Source, pdu.Reason);
}
break;
}
case 0x04: {
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs)
{
Logger.Info("{0} <- {1}", LogID, pdu);
}
_processQueue.Queue(ProcessPDataTF, pdu);
break;
}
case 0x05: {
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Info("{0} <- Association release request", LogID);
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
}
break;
}
case 0x06: {
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Info("{0} <- Association release response", LogID);
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
}
CloseConnection(0);
break;
}
case 0x07: {
var pdu = new AAbort();
pdu.Read(raw);
Logger.Info("{0} <- Abort: {1} - {2}", LogID, pdu.Source, pdu.Reason);
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
}
else if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
}
CloseConnection(0);
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (IOException e) {
int error = 0;
if (e.InnerException is SocketException)
{
error = (e.InnerException as SocketException).ErrorCode;
Logger.Error("Socket error while reading PDU: {0} [{1}]", (e.InnerException as SocketException).SocketErrorCode, (e.InnerException as SocketException).ErrorCode);
}
else if (!(e.InnerException is ObjectDisposedException))
{
Logger.Error("IO exception while reading PDU: {0}", e.ToString());
}
CloseConnection(error);
} catch (NullReferenceException) {
// connection already closed; silently ignore
CloseConnection(0);
} catch (Exception e) {
Logger.Error("Exception processing PDU: {0}", e.ToString());
CloseConnection(0);
}
}
/// <summary>
/// Reads A-ASSOCIATE-AC from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw) {
// reset async ops in case remote end does not negotiate
_assoc.MaxAsyncOpsInvoked = 1;
_assoc.MaxAsyncOpsPerformed = 1;
uint l = raw.Length - 6;
ushort c = 0;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 32);
l -= 68;
while (l > 0) {
byte type = raw.ReadByte("Item-Type");
l -= 1;
if (type == 0x10) {
// Application Context
raw.SkipBytes("Reserved", 1);
c = raw.ReadUInt16("Item-Length");
raw.SkipBytes("Value", (int)c);
l -= 3 + (uint)c;
} else
if (type == 0x21) {
// Presentation Context
raw.ReadByte("Reserved");
ushort pl = raw.ReadUInt16("Presentation Context Item-Length");
byte id = raw.ReadByte("Presentation Context ID");
raw.ReadByte("Reserved");
byte res = raw.ReadByte("Presentation Context Result/Reason");
raw.ReadByte("Reserved");
l -= (uint)pl + 3;
pl -= 4;
// Presentation Context Transfer Syntax
raw.ReadByte("Presentation Context Item-Type (0x40)");
raw.ReadByte("Reserved");
ushort tl = raw.ReadUInt16("Presentation Context Item-Length");
string tx = raw.ReadString("Presentation Context Syntax UID", tl);
pl -= (ushort)(tl + 4);
_assoc.PresentationContexts[id].SetResult((DicomPresentationContextResult)res, DicomTransferSyntax.Parse(tx));
} else if (type == 0x50) {
// User Information
raw.ReadByte("Reserved");
ushort il = raw.ReadUInt16("User Information Item-Length");
l -= (uint)(il + 3);
while (il > 0) {
byte ut = raw.ReadByte("User Item-Type");
raw.ReadByte("Reserved");
ushort ul = raw.ReadUInt16("User Item-Length");
il -= (ushort)(ul + 4);
if (ut == 0x51) {
_assoc.MaximumPDULength = raw.ReadUInt32("Max PDU Length");
} else if (ut == 0x52) {
_assoc.RemoteImplemetationClassUID = DicomUID.Parse(raw.ReadString("Implementation Class UID", ul));
} else if (ut == 0x53) {
_assoc.MaxAsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.MaxAsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
} else if (ut == 0x55) {
_assoc.RemoteImplementationVersion = raw.ReadString("Implementation Version", ul);
} else {
raw.SkipBytes("User Item Value", (int)ul);
}
}
} else {
raw.SkipBytes("Reserved", 1);
ushort il = raw.ReadUInt16("User Item-Length");
raw.SkipBytes("Unknown User Item", il);
l -= (uint)(il + 3);
}
}
}
/// <summary>
/// Reads A-ASSOCIATE-RQ from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
uint l = raw.Length - 6;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
_assoc.CalledAE = raw.ReadString("Called AE", 16);
_assoc.CallingAE = raw.ReadString("Calling AE", 16);
raw.SkipBytes("Reserved", 32);
l -= 2 + 2 + 16 + 16 + 32;
while (l > 0)
{
byte type = raw.ReadByte("Item-Type");
raw.SkipBytes("Reserved", 1);
ushort il = raw.ReadUInt16("Item-Length");
l -= 4 + (uint)il;
if (type == 0x10)
{
// Application Context
raw.SkipBytes("Application Context", il);
}
else
if (type == 0x20)
{
// Presentation Context
byte id = raw.ReadByte("Presentation Context ID");
raw.SkipBytes("Reserved", 3);
il -= 4;
while (il > 0)
{
byte pt = raw.ReadByte("Presentation Context Item-Type");
raw.SkipBytes("Reserved", 1);
ushort pl = raw.ReadUInt16("Presentation Context Item-Length");
string sx = raw.ReadString("Presentation Context Syntax UID", pl);
if (pt == 0x30)
{
var pc = new DicomPresentationContext(id, DicomUID.Parse(sx));
_assoc.PresentationContexts.Add(pc);
}
else if (pt == 0x40)
{
var pc = _assoc.PresentationContexts[id];
pc.AddTransferSyntax(DicomTransferSyntax.Parse(sx));
}
il -= (ushort)(4 + pl);
}
}
else
if (type == 0x50)
{
// User Information
while (il > 0)
{
byte ut = raw.ReadByte("User Information Item-Type");
raw.SkipBytes("Reserved", 1);
ushort ul = raw.ReadUInt16("User Information Item-Length");
il -= (ushort)(4 + ul);
if (ut == 0x51)
{
_assoc.MaximumPDULength = raw.ReadUInt32("Max PDU Length");
}
else if (ut == 0x52)
{
_assoc.RemoteImplemetationClassUID = new DicomUID(raw.ReadString("Implementation Class UID", ul), "Implementation Class UID", DicomUidType.Unknown);
}
else if (ut == 0x55)
{
_assoc.RemoteImplementationVersion = raw.ReadString("Implementation Version", ul);
}
else if (ut == 0x53)
{
_assoc.MaxAsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.MaxAsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
}
else if (ut == 0x54)
{
raw.SkipBytes("SCU/SCP Role Selection", ul);
/*
* ushort rsul = raw.ReadUInt16();
* if ((rsul + 4) != ul) {
* throw new DicomNetworkException("SCU/SCP role selection length (" + ul + " bytes) does not match uid length (" + rsul + " + 4 bytes)");
* }
* raw.ReadChars(rsul); // Abstract Syntax
* raw.ReadByte(); // SCU role
* raw.ReadByte(); // SCP role
*/
}
else
{
//Debug.Log.Error("Unhandled user item: 0x{0:x2} ({1} + 4 bytes)", ut, ul);
raw.SkipBytes("Unhandled User Item", ul);
}
}
}
}
}
/// <summary>
/// Reads A-ASSOCIATE-RJ from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw) {
raw.ReadByte("Reserved");
_rt = (DicomRejectResult)raw.ReadByte("Result");
_so = (DicomRejectSource)raw.ReadByte("Source");
_rn = (DicomRejectReason)raw.ReadByte("Reason");
}
/// <summary>
/// Reads A-ASSOCIATE-AC from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
// reset async ops in case remote end does not negotiate
_assoc.MaxAsyncOpsInvoked = 1;
_assoc.MaxAsyncOpsPerformed = 1;
uint l = raw.Length - 6;
ushort c = 0;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 32);
l -= 68;
while (l > 0)
{
byte type = raw.ReadByte("Item-Type");
l -= 1;
if (type == 0x10)
{
// Application Context
raw.SkipBytes("Reserved", 1);
c = raw.ReadUInt16("Item-Length");
raw.SkipBytes("Value", (int)c);
l -= 3 + (uint)c;
}
else
if (type == 0x21)
{
// Presentation Context
raw.ReadByte("Reserved");
ushort pl = raw.ReadUInt16("Presentation Context Item-Length");
byte id = raw.ReadByte("Presentation Context ID");
raw.ReadByte("Reserved");
byte res = raw.ReadByte("Presentation Context Result/Reason");
raw.ReadByte("Reserved");
l -= (uint)pl + 3;
pl -= 4;
// Presentation Context Transfer Syntax
raw.ReadByte("Presentation Context Item-Type (0x40)");
raw.ReadByte("Reserved");
ushort tl = raw.ReadUInt16("Presentation Context Item-Length");
string tx = raw.ReadString("Presentation Context Syntax UID", tl);
pl -= (ushort)(tl + 4);
_assoc.PresentationContexts[id].SetResult((DicomPresentationContextResult)res, DicomTransferSyntax.Parse(tx));
}
else if (type == 0x50)
{
// User Information
raw.ReadByte("Reserved");
ushort il = raw.ReadUInt16("User Information Item-Length");
l -= (uint)(il + 3);
while (il > 0)
{
byte ut = raw.ReadByte("User Item-Type");
raw.ReadByte("Reserved");
ushort ul = raw.ReadUInt16("User Item-Length");
il -= (ushort)(ul + 4);
if (ut == 0x51)
{
_assoc.MaximumPDULength = raw.ReadUInt32("Max PDU Length");
}
else if (ut == 0x52)
{
_assoc.RemoteImplemetationClassUID = DicomUID.Parse(raw.ReadString("Implementation Class UID", ul));
}
else if (ut == 0x53)
{
_assoc.MaxAsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.MaxAsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
}
else if (ut == 0x55)
{
_assoc.RemoteImplementationVersion = raw.ReadString("Implementation Version", ul);
}
else
{
raw.SkipBytes("User Item Value", (int)ul);
}
}
}
else
{
raw.SkipBytes("Reserved", 1);
ushort il = raw.ReadUInt16("User Item-Length");
raw.SkipBytes("Unknown User Item", il);
l -= (uint)(il + 3);
}
}
}
/// <summary>
/// Reads A-RELEASE-RP from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw) {
raw.ReadUInt32("Reserved");
}
private bool ProcessNextPDU()
{
RawPDU raw = new RawPDU(_network);
if (raw.Type == 0x04) {
if (_dimse == null) {
_dimse = new DcmDimseInfo();
}
}
try {
raw.ReadPDU();
switch (raw.Type) {
case 0x01: {
_assoc = new DcmAssociate();
AAssociateRQ pdu = new AAssociateRQ(_assoc);
pdu.Read(raw);
Log.Info("{0} <- Association request:\n{1}", LogID, Associate.ToString());
OnReceiveAssociateRequest(_assoc);
return true;
}
case 0x02: {
AAssociateAC pdu = new AAssociateAC(_assoc);
pdu.Read(raw);
Log.Info("{0} <- Association accept:\n{1}", LogID, Associate.ToString());
OnReceiveAssociateAccept(_assoc);
return true;
}
case 0x03: {
AAssociateRJ pdu = new AAssociateRJ();
pdu.Read(raw);
Log.Info("{0} <- Association reject [result: {1}; source: {2}; reason: {3}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
OnReceiveAssociateReject(pdu.Result, pdu.Source, pdu.Reason);
return true;
}
case 0x04: {
PDataTF pdu = new PDataTF();
pdu.Read(raw);
//Log.Debug("{0} <- P-Data-TF", LogID);
return ProcessPDataTF(pdu);
}
case 0x05: {
AReleaseRQ pdu = new AReleaseRQ();
pdu.Read(raw);
Log.Info("{0} <- Association release request", LogID);
OnReceiveReleaseRequest();
return true;
}
case 0x06: {
AReleaseRP pdu = new AReleaseRP();
pdu.Read(raw);
Log.Info("{0} <- Association release response", LogID);
OnReceiveReleaseResponse();
return true;
}
case 0x07: {
AAbort pdu = new AAbort();
pdu.Read(raw);
Log.Info("{0} <- Association abort: {1} - {2}", LogID, pdu.Source, pdu.Reason);
OnReceiveAbort(pdu.Source, pdu.Reason);
return true;
}
case 0xFF: {
return false;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
} catch (SocketException) {
throw;
} catch (Exception e) {
#if DEBUG
Log.Error("{0} -> Error reading PDU [type: 0x{1:x2}]: {2}", LogID, raw.Type, e.ToString());
#else
Log.Error("{0} -> Error reading PDU [type: 0x{1:x2}]: {2}", LogID, raw.Type, e.Message);
#endif
OnNetworkError(e);
//String file = String.Format(@"{0}\Errors\{1}.pdu",
// Dicom.Debug.GetStartDirectory(), DateTime.Now.Ticks);
//Directory.CreateDirectory(Dicom.Debug.GetStartDirectory() + @"\Errors");
//raw.Save(file);
return false;
}
}
/// <summary>
/// Reads A-ABORT from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw) {
raw.ReadByte("Reserved");
raw.ReadByte("Reserved");
_s = (DicomAbortSource)raw.ReadByte("Source");
_r = (DicomAbortReason)raw.ReadByte("Reason");
}
/// <summary>
/// Writes A-ASSOCIATE-RQ to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
RawPDU pdu = new RawPDU((byte)0x01);
pdu.Write("Version", (ushort)0x0001);
pdu.Write("Reserved", 0x00, 2);
pdu.Write("Called AE", _assoc.CalledAE, 16, ' ');
pdu.Write("Calling AE", _assoc.CallingAE, 16, ' ');
pdu.Write("Reserved", 0x00, 32);
// Application Context
pdu.Write("Item-Type", (byte)0x10);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Application Context Name", DicomUID.DICOMApplicationContextName.UID);
pdu.WriteLength16();
foreach (DcmPresContext pc in _assoc.GetPresentationContexts()) {
// Presentation Context
pdu.Write("Item-Type", (byte)0x20);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Presentation Context ID", (byte)pc.ID);
pdu.Write("Reserved", (byte)0x00, 3);
// Abstract Syntax
pdu.Write("Item-Type", (byte)0x30);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Abstract Syntax UID", pc.AbstractSyntax.UID);
pdu.WriteLength16();
// Transfer Syntax
foreach (DicomTransferSyntax ts in pc.GetTransfers()) {
pdu.Write("Item-Type", (byte)0x40);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Transfer Syntax UID", ts.UID.UID);
pdu.WriteLength16();
}
pdu.WriteLength16();
}
// User Data Fields
pdu.Write("Item-Type", (byte)0x50);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
// Maximum PDU
pdu.Write("Item-Type", (byte)0x51);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Max PDU Length", (uint)_assoc.MaximumPduLength);
// Implementation Class UID
pdu.Write("Item-Type", (byte)0x52);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Class UID", Implementation.ClassUID.UID);
pdu.WriteLength16();
// Asynchronous Operations Negotiation
if (_assoc.NegotiateAsyncOps) {
pdu.Write("Item-Type", (byte)0x53);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Asynchronous Operations Invoked", (ushort)_assoc.AsyncOpsInvoked);
pdu.Write("Asynchronous Operations Performed", (ushort)_assoc.AsyncOpsPerformed);
}
// Implementation Version
pdu.Write("Item-Type", (byte)0x55);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Version", Implementation.Version);
pdu.WriteLength16();
pdu.WriteLength16();
return pdu;
}
/// <summary>
/// Reads A-ASSOCIATE-AC from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
uint l = raw.Length;
ushort c = 0;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 32);
l -= 68;
while (l > 0)
{
byte type = raw.ReadByte("Item-Type");
l -= 1;
if (type == 0x10)
{
// Application Context
raw.SkipBytes("Reserved", 1);
c = raw.ReadUInt16("Item-Length");
raw.SkipBytes("Value", (int)c);
l -= 3 + (uint)c;
}
else
if (type == 0x21)
{
// Presentation Context
raw.ReadByte("Reserved");
ushort pl = raw.ReadUInt16("Presentation Context Item-Length");
byte id = raw.ReadByte("Presentation Context ID");
raw.ReadByte("Reserved");
byte res = raw.ReadByte("Presentation Context Result/Reason");
raw.ReadByte("Reserved");
l -= (uint)pl + 3;
pl -= 4;
// Presentation Context Transfer Syntax
raw.ReadByte("Presentation Context Item-Type (0x40)");
raw.ReadByte("Reserved");
ushort tl = raw.ReadUInt16("Presentation Context Item-Length");
string tx = raw.ReadString("Presentation Context Syntax UID", tl);
pl -= (ushort)(tl + 4);
_assoc.SetPresentationContextResult(id, (DcmPresContextResult)res);
_assoc.SetAcceptedTransferSyntax(id, DicomTransferSyntax.Lookup(tx));
}
else
if (type == 0x50)
{
// User Information
raw.ReadByte("Reserved");
ushort il = raw.ReadUInt16("User Information Item-Length");
l -= (uint)(il + 3);
while (il > 0)
{
byte ut = raw.ReadByte("User Item-Type");
raw.ReadByte("Reserved");
ushort ul = raw.ReadUInt16("User Item-Length");
il -= (ushort)(ul + 4);
if (ut == 0x51)
{
_assoc.MaximumPduLength = raw.ReadUInt32("Max PDU Length");
}
else if (ut == 0x52)
{
_assoc.ImplementationClass = DicomUID.Lookup(raw.ReadString("Implementation Class UID", ul));
}
else if (ut == 0x53)
{
_assoc.AsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.AsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
}
else if (ut == 0x55)
{
_assoc.ImplementationVersion = raw.ReadString("Implementation Version", ul);
}
else
{
raw.SkipBytes("User Item Value", (int)ul);
}
}
}
else
{
raw.SkipBytes("Reserved", 1);
ushort il = raw.ReadUInt16("User Item-Length");
raw.SkipBytes("Unknown User Item", il);
l -= (uint)(il + 3);
}
}
}
private void EndReadPDU(IAsyncResult result)
{
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0) {
// disconnected
CloseConnection(0);
return;
}
_readLength -= count;
if (_readLength > 0) {
_network.BeginRead(buffer, buffer.Length - _readLength, _readLength, EndReadPDU, buffer);
return;
}
var raw = new RawPDU(buffer);
switch (raw.Type) {
case 0x01: {
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
Logger.Log(LogLevel.Info, "{0} <- Association request:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
break;
}
case 0x02: {
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Log(LogLevel.Info, "{0} <- Association accept:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
break;
}
case 0x03: {
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association reject [result: {1}; source: {2}; reason: {3}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReject(pdu.Result, pdu.Source, pdu.Reason);
break;
}
case 0x04: {
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs)
Logger.Info("{0} <- {1}", LogID, pdu);
_processQueue.Queue(ProcessPDataTF, pdu);
break;
}
case 0x05: {
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association release request", LogID);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
break;
}
case 0x06: {
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association release response", LogID);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
CloseConnection(0);
break;
}
case 0x07: {
var pdu = new AAbort();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Abort: {1} - {2}", LogID, pdu.Source, pdu.Reason);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
else if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
CloseConnection(0);
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (IOException e) {
int error = 0;
if (e.InnerException is SocketException) {
error = (e.InnerException as SocketException).ErrorCode;
Logger.Error("Socket error while reading PDU: {0} [{1}]", (e.InnerException as SocketException).SocketErrorCode, (e.InnerException as SocketException).ErrorCode);
} else if (!(e.InnerException is ObjectDisposedException))
Logger.Error("IO exception while reading PDU: {0}", e.ToString());
CloseConnection(error);
} catch (Exception e) {
Logger.Log(LogLevel.Error, "Exception processing PDU: {0}", e.ToString());
CloseConnection(0);
}
}
private async void ReadAndProcessPDUs()
{
try
{
while (this.IsConnected)
{
// Read PDU header
_readLength = 6;
var buffer = new byte[6];
var count = await this._network.ReadAsync(buffer, 0, 6).ConfigureAwait(false);
do
{
if (count == 0)
{
// disconnected
this.CloseConnection(null);
return;
}
this._readLength -= count;
if (this._readLength > 0)
{
count =
await
this._network.ReadAsync(buffer, 6 - this._readLength, this._readLength)
.ConfigureAwait(false);
}
}
while (this._readLength > 0);
var length = BitConverter.ToInt32(buffer, 2);
length = Endian.Swap(length);
this._readLength = length;
Array.Resize(ref buffer, length + 6);
count = await this._network.ReadAsync(buffer, 6, length).ConfigureAwait(false);
// Read PDU
do
{
if (count == 0)
{
// disconnected
this.CloseConnection(null);
return;
}
this._readLength -= count;
if (this._readLength > 0)
{
count =
await
this._network.ReadAsync(buffer, buffer.Length - this._readLength, this._readLength)
.ConfigureAwait(false);
}
}
while (this._readLength > 0);
var raw = new RawPDU(buffer);
switch (raw.Type)
{
case 0x01:
{
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
if (Options.UseRemoteAEForLogName) Logger = LogManager.GetLogger(LogID);
Logger.Info(
"{callingAE} <- Association request:\n{association}",
LogID,
Association.ToString());
if (this is IDicomServiceProvider) (this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
break;
}
case 0x02:
{
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Info(
"{calledAE} <- Association accept:\n{assocation}",
LogID,
Association.ToString());
if (this is IDicomServiceUser) (this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
break;
}
case 0x03:
{
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Info(
"{logId} <- Association reject [result: {pduResult}; source: {pduSource}; reason: {pduReason}]",
LogID,
pdu.Result,
pdu.Source,
pdu.Reason);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReject(
pdu.Result,
pdu.Source,
pdu.Reason);
break;
}
case 0x04:
{
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs) Logger.Info("{logId} <- {@pdu}", LogID, pdu);
await this.ProcessPDataTFAsync(pdu).ConfigureAwait(false);
break;
}
case 0x05:
{
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Info("{logId} <- Association release request", LogID);
if (this is IDicomServiceProvider) (this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
break;
}
case 0x06:
{
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Info("{logId} <- Association release response", LogID);
if (this is IDicomServiceUser) (this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
CloseConnection(null);
return;
}
case 0x07:
{
var pdu = new AAbort();
pdu.Read(raw);
Logger.Info(
"{logId} <- Abort: {pduSource} - {pduReason}",
LogID,
pdu.Source,
pdu.Reason);
if (this is IDicomServiceProvider) (this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
else if (this is IDicomServiceUser) (this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
CloseConnection(null);
return;
}
case 0xFF:
{
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
}
}
catch (ObjectDisposedException)
{
// silently ignore
CloseConnection(null);
}
catch (NullReferenceException)
{
// connection already closed; silently ignore
CloseConnection(null);
}
catch (IOException e)
{
LogIOException(this.Logger, e, true);
CloseConnection(e);
}
catch (Exception e)
{
Logger.Error("Exception processing PDU: {@error}", e);
CloseConnection(e);
}
}
/// <summary>
/// Reads A-ASSOCIATE-RQ from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
var l = raw.Length - 6;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
_assoc.CalledAE = raw.ReadString("Called AE", 16);
_assoc.CallingAE = raw.ReadString("Calling AE", 16);
raw.SkipBytes("Reserved", 32);
l -= 2 + 2 + 16 + 16 + 32;
while (l > 0)
{
var type = raw.ReadByte("Item-Type");
raw.SkipBytes("Reserved", 1);
var il = raw.ReadUInt16("Item-Length");
l -= 4 + (uint)il;
if (type == 0x10)
{
// Application Context
raw.SkipBytes("Application Context", il);
}
else if (type == 0x20)
{
// Presentation Context
var id = raw.ReadByte("Presentation Context ID");
raw.SkipBytes("Reserved", 3);
il -= 4;
while (il > 0)
{
var pt = raw.ReadByte("Presentation Context Item-Type");
raw.SkipBytes("Reserved", 1);
var pl = raw.ReadUInt16("Presentation Context Item-Length");
var sx = raw.ReadString("Presentation Context Syntax UID", pl);
if (pt == 0x30)
{
var pc = new DicomPresentationContext(id, DicomUID.Parse(sx));
_assoc.PresentationContexts.Add(pc);
}
else if (pt == 0x40)
{
var pc = _assoc.PresentationContexts[id];
pc.AddTransferSyntax(DicomTransferSyntax.Parse(sx));
}
il -= (ushort)(4 + pl);
}
}
else if (type == 0x50)
{
// User Information
while (il > 0)
{
var ut = raw.ReadByte("User Information Item-Type");
raw.SkipBytes("Reserved", 1);
var ul = raw.ReadUInt16("User Information Item-Length");
il -= (ushort)(4 + ul);
if (ut == 0x51)
{
_assoc.MaximumPDULength = raw.ReadUInt32("Max PDU Length");
}
else if (ut == 0x52)
{
_assoc.RemoteImplementationClassUID =
new DicomUID(
raw.ReadString("Implementation Class UID", ul),
"Implementation Class UID",
DicomUidType.Unknown);
}
else if (ut == 0x55)
{
_assoc.RemoteImplementationVersion = raw.ReadString("Implementation Version", ul);
}
else if (ut == 0x53)
{
_assoc.MaxAsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.MaxAsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
}
else if (ut == 0x54)
{
var asul = raw.ReadUInt16("Abstract Syntax Item-Length");
var syntax = raw.ReadString("Abstract Syntax UID", asul);
var userRole = raw.ReadByte("SCU role");
var providerRole = raw.ReadByte("SCP role");
var pc =
_assoc.PresentationContexts.FirstOrDefault(
context => context.AbstractSyntax.UID.Equals(syntax));
if (pc != null)
{
pc.UserRole = userRole == 0x01;
pc.ProviderRole = providerRole == 0x01;
}
}
else if (ut == 0x56)
{
_assoc.ExtendedNegotiations.Add(DicomExtendedNegotiation.Create(raw, ul));
}
else
{
#if !NET35
if (HandlePDUBytes != null)
{
HandlePDUBytes(raw.ReadBytes("Unhandled User Item", ul));
}
else
{
raw.SkipBytes("Unhandled User Item", ul);
}
#else
raw.SkipBytes("Unhandled User Item", ul);
#endif
}
}
}
}
}
/// <summary>
/// Writes A-ASSOCIATE-AC to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
var pdu = new RawPDU(0x02);
pdu.Write("Version", (ushort)0x0001);
pdu.Write("Reserved", 0x00, 2);
pdu.Write("Called AE", _assoc.CalledAE, 16, ' ');
pdu.Write("Calling AE", _assoc.CallingAE, 16, ' ');
pdu.Write("Reserved", 0x00, 32);
// Application Context
pdu.Write("Item-Type", 0x10);
pdu.Write("Reserved", 0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Application Context Name", DicomUID.DICOMApplicationContextName.UID);
pdu.WriteLength16();
foreach (var pc in _assoc.PresentationContexts)
{
// Presentation Context
pdu.Write("Item-Type", 0x21);
pdu.Write("Reserved", 0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Presentation Context ID", pc.ID);
pdu.Write("Reserved", 0x00);
pdu.Write("Result", (byte)pc.Result);
pdu.Write("Reserved", 0x00);
// Transfer Syntax (set to Implicit VR Little Endian if no accepted transfer syntax is defined)
pdu.Write("Item-Type", 0x40);
pdu.Write("Reserved", 0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Transfer Syntax UID",
pc.AcceptedTransferSyntax?.UID.UID ?? DicomUID.ImplicitVRLittleEndian.UID);
pdu.WriteLength16();
pdu.WriteLength16();
}
// User Data Fields
pdu.Write("Item-Type", 0x50);
pdu.Write("Reserved", 0x00);
pdu.MarkLength16("Item-Length");
// Maximum PDU
pdu.Write("Item-Type", 0x51);
pdu.Write("Reserved", 0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Max PDU Length", _assoc.MaximumPDULength);
// Implementation Class UID
pdu.Write("Item-Type", 0x52);
pdu.Write("Reserved", 0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Class UID", DicomImplementation.ClassUID.UID);
pdu.WriteLength16();
// Asynchronous Operations Negotiation
if (_assoc.MaxAsyncOpsInvoked != 1 || _assoc.MaxAsyncOpsPerformed != 1)
{
pdu.Write("Item-Type", 0x53);
pdu.Write("Reserved", 0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Asynchronous Operations Invoked", (ushort)_assoc.MaxAsyncOpsInvoked);
pdu.Write("Asynchronous Operations Performed", (ushort)_assoc.MaxAsyncOpsPerformed);
}
foreach (var pc in _assoc.PresentationContexts)
{
if (pc.UserRole.HasValue || pc.ProviderRole.HasValue)
{
pdu.Write("Item-Type", 0x54);
pdu.Write("Reserved", 0x00);
pdu.MarkLength16("Item-Length");
pdu.MarkLength16("UID-Length");
pdu.Write("Abstract Syntax UID", pc.AbstractSyntax.UID);
pdu.WriteLength16();
pdu.Write("SCU Role", pc.UserRole.GetValueOrDefault() ? (byte)1 : (byte)0);
pdu.Write("SCP Role", pc.ProviderRole.GetValueOrDefault() ? (byte)1 : (byte)0);
pdu.WriteLength16();
}
}
// Implementation Version
pdu.Write("Item-Type", 0x55);
pdu.Write("Reserved", 0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Version", DicomImplementation.Version);
pdu.WriteLength16();
foreach (var exNeg in _assoc.ExtendedNegotiations)
{
exNeg.Write(pdu);
}
pdu.WriteLength16();
return(pdu);
}
/// <summary>
/// Reads A-ASSOCIATE-AC from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
// reset async ops in case remote end does not negotiate
_assoc.MaxAsyncOpsInvoked = 1;
_assoc.MaxAsyncOpsPerformed = 1;
var l = raw.Length - 6;
raw.ReadUInt16("Version");
raw.SkipBytes("Reserved", 2);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 16);
raw.SkipBytes("Reserved", 32);
l -= 68;
while (l > 0)
{
var type = raw.ReadByte("Item-Type");
l -= 1;
if (type == 0x10)
{
// Application Context
raw.SkipBytes("Reserved", 1);
var c = raw.ReadUInt16("Item-Length");
raw.SkipBytes("Value", c);
l -= 3 + (uint)c;
}
else if (type == 0x21)
{
// Presentation Context
raw.ReadByte("Reserved");
var pl = raw.ReadUInt16("Presentation Context Item-Length");
var id = raw.ReadByte("Presentation Context ID");
raw.ReadByte("Reserved");
var res = raw.ReadByte("Presentation Context Result/Reason");
raw.ReadByte("Reserved");
l -= (uint)pl + 3;
pl -= 4;
if ((DicomPresentationContextResult)res == DicomPresentationContextResult.Accept)
{
// Presentation Context Transfer Syntax
raw.ReadByte("Presentation Context Item-Type (0x40)");
raw.ReadByte("Reserved");
var tl = raw.ReadUInt16("Presentation Context Item-Length");
var tx = raw.ReadString("Presentation Context Syntax UID", tl);
pl -= (ushort)(tl + 4);
_assoc.PresentationContexts[id].SetResult(
(DicomPresentationContextResult)res,
DicomTransferSyntax.Parse(tx));
}
else
{
raw.SkipBytes("Rejected Presentation Context", pl);
_assoc.PresentationContexts[id].SetResult((DicomPresentationContextResult)res);
}
}
else if (type == 0x50)
{
// User Information
raw.ReadByte("Reserved");
var il = raw.ReadUInt16("User Information Item-Length");
l -= (uint)(il + 3);
while (il > 0)
{
var ut = raw.ReadByte("User Item-Type");
raw.ReadByte("Reserved");
var ul = raw.ReadUInt16("User Item-Length");
il -= (ushort)(ul + 4);
if (ut == 0x51)
{
_assoc.MaximumPDULength = raw.ReadUInt32("Max PDU Length");
}
else if (ut == 0x52)
{
_assoc.RemoteImplementationClassUID =
DicomUID.Parse(raw.ReadString("Implementation Class UID", ul));
}
else if (ut == 0x53)
{
_assoc.MaxAsyncOpsInvoked = raw.ReadUInt16("Asynchronous Operations Invoked");
_assoc.MaxAsyncOpsPerformed = raw.ReadUInt16("Asynchronous Operations Performed");
}
else if (ut == 0x54)
{
var asul = raw.ReadUInt16("Abstract Syntax Item-Length");
var syntax = raw.ReadString("Abstract Syntax UID", asul);
var userRole = raw.ReadByte("SCU role");
var providerRole = raw.ReadByte("SCP role");
var pc =
_assoc.PresentationContexts.FirstOrDefault(
context => context.AbstractSyntax.UID.Equals(syntax));
if (pc != null)
{
pc.UserRole = userRole == 0x01;
pc.ProviderRole = providerRole == 0x01;
}
}
else if (ut == 0x55)
{
_assoc.RemoteImplementationVersion = raw.ReadString("Implementation Version", ul);
}
else if (ut == 0x56)
{
_assoc.ExtendedNegotiations.Add(DicomExtendedNegotiation.Create(raw, ul));
}
else
{
raw.SkipBytes("User Item Value", ul);
}
}
}
else
{
raw.SkipBytes("Reserved", 1);
var il = raw.ReadUInt16("User Item-Length");
raw.SkipBytes("Unknown User Item", il);
l -= (uint)(il + 3);
}
}
}
/// <summary>
/// Writes A-ASSOCIATE-AC to PDU buffer
/// </summary>
/// <returns>PDU buffer</returns>
public RawPDU Write()
{
RawPDU pdu = new RawPDU((byte)0x02);
pdu.Write("Version", (ushort)0x0001);
pdu.Write("Reserved", 0x00, 2);
pdu.Write("Called AE", _assoc.CalledAE, 16, ' ');
pdu.Write("Calling AE", _assoc.CallingAE, 16, ' ');
pdu.Write("Reserved", 0x00, 32);
// Application Context
pdu.Write("Item-Type", (byte)0x10);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Application Context Name", DicomUID.DICOMApplicationContextName.UID);
pdu.WriteLength16();
foreach (var pc in _assoc.PresentationContexts)
{
// Presentation Context
pdu.Write("Item-Type", (byte)0x21);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Presentation Context ID", (byte)pc.ID);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Result", (byte)pc.Result);
pdu.Write("Reserved", (byte)0x00);
// Transfer Syntax
pdu.Write("Item-Type", (byte)0x40);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Transfer Syntax UID", pc.AcceptedTransferSyntax.UID.UID);
pdu.WriteLength16();
pdu.WriteLength16();
}
// User Data Fields
pdu.Write("Item-Type", (byte)0x50);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
// Maximum PDU
pdu.Write("Item-Type", (byte)0x51);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Max PDU Length", (uint)_assoc.MaximumPDULength);
// Implementation Class UID
pdu.Write("Item-Type", (byte)0x52);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Class UID", DicomImplementation.ClassUID.UID);
pdu.WriteLength16();
// Asynchronous Operations Negotiation
if (_assoc.MaxAsyncOpsInvoked != 1 || _assoc.MaxAsyncOpsPerformed != 1)
{
pdu.Write("Item-Type", (byte)0x53);
pdu.Write("Reserved", (byte)0x00);
pdu.Write("Item-Length", (ushort)0x0004);
pdu.Write("Asynchronous Operations Invoked", (ushort)_assoc.MaxAsyncOpsInvoked);
pdu.Write("Asynchronous Operations Performed", (ushort)_assoc.MaxAsyncOpsPerformed);
}
// Implementation Version
pdu.Write("Item-Type", (byte)0x55);
pdu.Write("Reserved", (byte)0x00);
pdu.MarkLength16("Item-Length");
pdu.Write("Implementation Version", DicomImplementation.Version);
pdu.WriteLength16();
pdu.WriteLength16();
return(pdu);
}
private void EndReadPDU(IAsyncResult result) {
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0) {
// disconnected
CloseConnection(null);
return;
}
_readLength -= count;
if (_readLength > 0) {
_network.BeginRead(buffer, buffer.Length - _readLength, _readLength, EndReadPDU, buffer);
return;
}
var raw = new RawPDU(buffer);
switch (raw.Type) {
case 0x01: {
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
if (Options.UseRemoteAEForLogName)
Logger = LogManager.Default.GetLogger(LogID);
Logger.Info("{callingAE} <- Association request:\n{association}", LogID, Association.ToString());
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
break;
}
case 0x02: {
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Info("{calledAE} <- Association accept:\n{assocation}", LogID, Association.ToString());
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
break;
}
case 0x03: {
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Info("{logId} <- Association reject [result: {pduResult}; source: {pduSource}; reason: {pduReason}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReject(pdu.Result, pdu.Source, pdu.Reason);
break;
}
case 0x04: {
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs)
Logger.Info("{logId} <- {@pdu}", LogID, pdu);
_processQueue.Queue(ProcessPDataTF, pdu);
break;
}
case 0x05: {
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Info("{logId} <- Association release request", LogID);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
break;
}
case 0x06: {
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Info("{logId} <- Association release response", LogID);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
CloseConnection(null);
break;
}
case 0x07: {
var pdu = new AAbort();
pdu.Read(raw);
Logger.Info("{logId} <- Abort: {pduSource} - {pduReason}", LogID, pdu.Source, pdu.Reason);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
else if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
CloseConnection(null);
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (IOException e) {
if (e.InnerException is SocketException) {
Logger.Error("Socket error while reading PDU: {socketErrorCode} [{errorCode}]", (e.InnerException as SocketException).SocketErrorCode, (e.InnerException as SocketException).ErrorCode);
} else if (!(e.InnerException is ObjectDisposedException))
Logger.Error("IO exception while reading PDU: {@error}", e);
CloseConnection(e);
} catch (NullReferenceException) {
// connection already closed; silently ignore
CloseConnection(null);
} catch (Exception e) {
Logger.Error("Exception processing PDU: {@error}", e);
CloseConnection(e);
}
}
/// <summary>
/// Reads A-RELEASE-RP from PDU buffer
/// </summary>
/// <param name="raw">PDU buffer</param>
public void Read(RawPDU raw)
{
raw.ReadUInt32("Reserved");
}
private void EndReadPDU(IAsyncResult result)
{
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0)
{
// disconnected
_network.Close();
_isConnected = false;
return;
}
_readLength -= count;
if (_readLength > 0)
{
_network.BeginRead(buffer, buffer.Length - _readLength, _readLength, EndReadPDU, buffer);
return;
}
var raw = new RawPDU(buffer);
switch (raw.Type)
{
case 0x01: {
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
Logger.Log(LogLevel.Info, "{0} <- Association request:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
}
break;
}
case 0x02: {
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Log(LogLevel.Info, "{0} <- Association accept:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
}
break;
}
case 0x03: {
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association reject [result: {1}; source: {2}; reason: {3}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationReject(pdu.Result, pdu.Source, pdu.Reason);
}
break;
}
case 0x04: {
var pdu = new PDataTF();
pdu.Read(raw);
ProcessPDataTF(pdu);
break;
}
case 0x05: {
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association release request", LogID);
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
}
break;
}
case 0x06: {
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association release response", LogID);
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
}
_network.Close();
_isConnected = false;
break;
}
case 0x07: {
var pdu = new AAbort();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Abort: {1} - {2}", LogID, pdu.Source, pdu.Reason);
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
}
else if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
}
_network.Close();
_isConnected = false;
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (Exception e) {
Logger.Log(LogLevel.Error, "Exception processing PDU: {0}", e.ToString());
_network.Close();
_isConnected = false;
}
}
private void SendRawPDU(RawPDU pdu)
{
try {
lock (_socket) {
_disableTimeout = true;
pdu.WritePDU(_network);
_disableTimeout = false;
}
}
catch (Exception e) {
#if DEBUG
Log.Error("{0} -> Error sending PDU [type: 0x{1:x2}]: {2}", LogID, pdu.Type, e.ToString());
#else
Log.Error("{0} -> Error sending PDU [type: 0x{1:x2}]: {2}", LogID, pdu.Type, e.Message);
#endif
OnNetworkError(e);
}
}
/// <summary>
/// Factory method for creating <see cref="DicomExtendedNegotiation"/> instances.
/// </summary>
/// <param name="raw">Raw PDU.</param>
/// <param name="length">Length.</param>
/// <returns>A new <see cref="DicomExtendedNegotiation"/> instance.</returns>
public static DicomExtendedNegotiation Create(RawPDU raw, ushort length)
{
var uidLen = raw.ReadUInt16("SOP Class UID Length");
var uidStr = raw.ReadString("SOP Class UID", uidLen);
var uid = DicomUID.Parse(uidStr);
IExtendedNegotiationSubItem subItem = null;
var subItemSize = 0;
var remaining = length - uidLen - 2;
if (subItemCreators.ContainsKey(uid))
{
subItem = subItemCreators[uid](raw, remaining, out subItemSize);
}
remaining -= subItemSize;
if (remaining > 0)
{
raw.SkipBytes("Unread bytes", remaining);
}
return new DicomExtendedNegotiation(uid, subItem);
}