public static Message <Request> ReadAssociationRequest(NetworkBinaryReader dr)
{
var rq = new Request();
rq.PresentationContexts = new List <PresentationContext>();
dr.Skip(1); //PDU ID and Reserved Null Byte
int length = LengthReader.ReadBigEndian(dr.Take(4));
using (DICOMBinaryReader sub = dr.GetSubStream(length))
{
rq.ProtocolVersion = LengthReader.ReadBigEndian(sub, 2);
sub.Skip(2); //Reserved Null Bytes
rq.CalledEntityTitle = sub.ReadString(16).Trim();
rq.CallingEntityTitle = sub.ReadString(16).Trim();
sub.Skip(32); //Reserved Null Bytes
rq.ApplicationContext = ItemReader.ReadApplicationContext(sub);
while (sub.Peek(1)[0] == (byte)ItemType.PRESENTATION_CONTEXT_REQUEST)
{
PresentationContext context = ItemReader.ReadPresentationCtxRequest(sub);
rq.PresentationContexts.Add(context);
}
rq.UserInfo = ItemReader.ReadUserInfo(sub);
}
return(new Message <Request> {
Payload = rq, Type = MessageType.PDU
});
}
public static Message <Accept> ReadAssociationAccept(NetworkBinaryReader dr)
{
var acc = new Accept();
acc.PresentationContexts = new List <PresentationContext>();
dr.Skip(1); //PDU ID and Reserved Null Byte
int length = LengthReader.ReadBigEndian(dr.Take(4));
using (DICOMBinaryReader sub = dr.GetSubStream(length))
{
acc.ProtocolVersion = LengthReader.ReadBigEndian(sub, 2);
sub.Skip(2); //Reserved Null Bytes
acc.CalledEntityTitle = sub.ReadString(16).Trim();
acc.CallingEntityTitle = sub.ReadString(16).Trim();
sub.Skip(32); //Reserved Null Bytes
acc.ApplicationContext = ItemReader.ReadApplicationContext(sub);
while (sub.Peek(1).First() == (byte)ItemType.PRESENTATION_CONTEXT_ACCEPT)
{
PresentationContext context = ItemReader.ReadPresentationCtxAccept(sub);
if (context != null)
{
acc.PresentationContexts.Add(context);
}
}
acc.UserInfo = ItemReader.ReadUserInfo(sub);
}
return(new Message <Accept> {
Payload = acc, Type = MessageType.PDU
});
}
public static UserInfo ReadUserInfo(DICOMBinaryReader dr)
{
AssertItemType(dr, "User Info", ItemType.USER_INFO);
var ui = new UserInfo();
dr.Skip(2); // PDU ID and Reserved Null Byte
var length = LengthReader.ReadBigEndian(dr, 2);
if (length > 0)
{
ui.MaxPDULength = (int)ReadMaxLength(dr);
if (dr.StreamPosition >= dr.StreamLength)
{
return(ui);
}
ui.ImplementationUID = ReadImplementationClassUID(dr);
if (dr.StreamPosition >= dr.StreamLength)
{
return(ui);
}
if (dr.Peek(1)[0] == (byte)ItemType.ASYNCHRONOUS_OPERATIONS_WINDOW)
{
ui.AsynchronousOperations = ReadAsyncOperations(dr);
}
if (dr.StreamPosition >= dr.StreamLength)
{
return(ui);
}
if (dr.Peek(1)[0] == (byte)ItemType.IMPLEMENTATION_VERSION_NAME)
{
ui.ImplementationVersion = ReadImplementationVersion(dr);
}
if (dr.StreamPosition >= dr.StreamLength)
{
return(ui);
}
if (dr.Peek(1)[0] == (byte)ItemType.SCPSCU_ROLE_SELECTION)
{
ui.ImplementationVersion = ReadSCPSCURoleSelection(dr);
}
}
return(ui);
}
public static void AssertItemType(DICOMBinaryReader dr, string itemName, ItemType itemType)
{
var header = dr.Peek(1)[0];
if (header != (byte)itemType)
{
throw new FormatException($"Could not read {itemName} from DICOM stream");
}
}
public static void AssertItemType(DICOMBinaryReader dr, string itemName, ItemType itemType)
{
var header = dr.Peek(1)[0];
if (header != (byte)itemType)
{
throw new Exception();
}
}
public static UserInfo ReadUserInfo(DICOMBinaryReader dr)
{
AssertItemType(dr, "User Info", ItemType.USER_INFO);
var ui = new UserInfo();
dr.Skip(2); // PDU ID and Reserved Null Byte
var length = LengthReader.ReadBigEndian(dr, 2);
if (length > 0)
{
ui.MaxPDULength = (int)ReadMaxLength(dr);
ui.ImplementationUID = ReadImplementationClassUID(dr);
if (dr.Peek(1)[0] == (byte)ItemType.ASYNCHRONOUS_OPERATIONS_WINDOW)
{
ui.AsynchronousOperations = ReadAsyncOperations(dr);
}
ui.ImplementationVersion = ReadImplementationVersion(dr);
}
return(ui);
}
