/// <summary>
/// Sends an SCTP control packet with an abort chunk to terminate
/// the association.
/// </summary>
/// <param name="errorCause">The cause of the abort.</param>
public void Abort(ISctpErrorCause errorCause)
{
if (!_wasAborted)
{
_wasAborted = true;
bool tBit = _remoteVerificationTag != 0;
var abortChunk = new SctpAbortChunk(tBit);
abortChunk.AddErrorCause(errorCause);
SendChunk(abortChunk);
OnAborted?.Invoke(errorCause.CauseCode.ToString());
_dataSender.Close();
}
}
/// <summary>
/// Send an SCTP packet with one of the error type chunks (ABORT or ERROR) to the remote peer.
/// </summary>
/// <param name=isAbort">Set to true to use an ABORT chunk otherwise an ERROR chunk will be used.</param>
/// <param name="desintationPort">The SCTP destination port.</param>
/// <param name="sourcePort">The SCTP source port.</param>
/// <param name="initiateTag">If available the initial tag for the remote peer.</param>
/// <param name="error">The error to send.</param>
private void SendError(
bool isAbort,
ushort destinationPort,
ushort sourcePort,
uint initiateTag,
ISctpErrorCause error)
{
SctpPacket errorPacket = new SctpPacket(
destinationPort,
sourcePort,
initiateTag);
SctpErrorChunk errorChunk = isAbort ? new SctpAbortChunk(true) : new SctpErrorChunk();
errorChunk.AddErrorCause(error);
errorPacket.AddChunk(errorChunk);
var buffer = errorPacket.GetBytes();
Send(null, buffer, 0, buffer.Length);
}
/// <summary>
/// Adds an additional error cause parameter to the chunk.
/// </summary>
/// <param name="errorCause">The additional error cause to add to the chunk.</param>
public void AddErrorCause(ISctpErrorCause errorCause)
{
ErrorCauses.Add(errorCause);
}
/// <summary>
/// Creates a new ERROR chunk.
/// </summary>
/// <param name="errorCause">The initial error cause to set on this chunk.</param>
public SctpErrorChunk(ISctpErrorCause errorCause) : base(SctpChunkType.ERROR)
{
ErrorCauses.Add(errorCause);
}