public async Task RespondWithFailure(ResponseOrFailureCode responseCode)
{
ReceivedFromNeighborNullable?.AssertIsNotDisposed();
var failure = new FailurePacket
{
ReqP2pSeq16 = ReqP2pSeq16,
ResponseCode = responseCode,
};
var failureUdpData = failure.Encode_OpionallySignNeighborHMAC(ReceivedFromNeighborNullable);
await _engine.OptionallySendUdpRequestAsync_Retransmit_WaitForNeighborPeerAck("RoutedRequest failure 123123", failureUdpData, ReceivedFromEndpoint,
failure.ReqP2pSeq16, ReceivedFromNeighborNullable, failure.GetSignedFieldsForNeighborHMAC);
}
/// <summary>
/// sends FAILURE or NPACK
/// </summary>
public async Task SendErrorResponse(ResponseOrFailureCode responseCode)
{
Logger.WriteToLog_higherLevelDetail($">> SendErrorResponse(responseCode={responseCode}) ReqP2pSeq16={ReqP2pSeq16}");
if (ReceivedFromNeighborNullable?.IsDisposed == true)
{
return;
}
if (_repliedWithNPA)
{
// send FAILURE
await RespondWithFailure(responseCode);
}
else
{
// send NPACK
SendNeighborPeerAck(responseCode);
}
}
internal void SendNeighborPeerAck(ResponseOrFailureCode responseCode)
{
var npAck = new NeighborPeerAckPacket
{
ReqP2pSeq16 = ReqP2pSeq16,
ResponseCode = responseCode
};
if (ReceivedFromNeighborNullable != null)
{
npAck.NeighborToken32 = ReceivedFromNeighborNullable.RemoteNeighborToken32;
npAck.NeighborHMAC = ReceivedFromNeighborNullable.GetNeighborHMAC(w => npAck.GetSignedFieldsForNeighborHMAC(w, GetSignedFieldsForNeighborHMAC));
}
var npAckUdpData = npAck.Encode(ReceivedFromNeighborNullable == null);
_engine.RespondToRequestAndRetransmissions(RequestUdpPayloadData, npAckUdpData, ReceivedFromEndpoint);
_repliedWithNPA = true;
}
public NeighborPeerAckPacket(byte[] nextHopResponsePacketData)
{
var reader = PacketProcedures.CreateBinaryReader(nextHopResponsePacketData, 1);
ReqP2pSeq16 = RequestP2pSequenceNumber16.Decode(reader);
var flags = reader.ReadByte();
if ((flags & FlagsMask_MustBeZero) != 0)
{
throw new NotImplementedException();
}
if ((flags & Flag_EPtoA) == 0)
{
NeighborToken32 = NeighborToken32.Decode(reader);
}
ResponseCode = (ResponseOrFailureCode)reader.ReadByte();
if ((flags & Flag_EPtoA) == 0)
{
NeighborHMAC = HMAC.Decode(reader);
}
}
public RequestRejectedException(ResponseOrFailureCode responseCode)
: base($"Request was rejected with status = {responseCode}")
{
ResponseCode = responseCode;
}