public static bool TryParse(ReadOnlyMemory <byte> bytes, out RetryPacket result) { result = new RetryPacket(); if (bytes.IsEmpty) { return(false); } var firstByte = PacketFirstByte.Parse(bytes.Span[0]); if (!firstByte.IsRetryType()) { return(false); } var afterFirstByteBytes = bytes.Slice(1); var version = PacketVersion.Parse(afterFirstByteBytes, out var afterVersionBytes); var destinationConnectionId = PacketConnectionId.Parse(afterVersionBytes, out var afterDestinationConnectionIdBytes); var sourceConnectionId = PacketConnectionId.Parse(afterDestinationConnectionIdBytes, out var afterSourceConnectionIdBytes); var tag = PacketRetryIntegrityTag.Parse(afterSourceConnectionIdBytes, out var beforeTagBytes); var token = new PacketToken(beforeTagBytes); result = new RetryPacket(version, destinationConnectionId, sourceConnectionId, token, tag); return(true); }
public static bool TryParseProtected(IAead aead, ICipher cipher, MemoryCursor cursor, out InitialPacket result) { result = new InitialPacket(); var startOffset = cursor.AsOffset(); var firstByte = PacketFirstByte.Parse(cursor.Peek(1).Span[0]); if (!firstByte.IsInitialType()) { return(false); } cursor.Move(1); var version = PacketVersion.Parse(cursor); var destinationConnectionId = PacketConnectionId.Parse(cursor); var sourceConnectionId = PacketConnectionId.Parse(cursor); var token = PacketToken.Parse(cursor); var payload = PacketPayload.SliceLongProtectedPacketBytes(cursor, aead, cipher, startOffset, firstByte, null, out var packetNumber); result = new InitialPacket(version, destinationConnectionId, sourceConnectionId, token, packetNumber, payload); return(true); }
public static bool TryParse(MemoryCursor cursor, PacketNumber largestAcknowledgedPacketNumber, out HandshakePacket result) { result = new HandshakePacket(); var startOffset = cursor.AsOffset(); var firstByte = PacketFirstByte.Parse(cursor.Peek(1).Span[0]); if (!firstByte.IsHandshakeType()) { return(false); } cursor.Move(1); var version = PacketVersion.Parse(cursor); var destinationConnectionId = PacketConnectionId.Parse(cursor); var sourceConnectionId = PacketConnectionId.Parse(cursor); var payload = PacketPayload.SlicePacketBytes(cursor, firstByte, startOffset, largestAcknowledgedPacketNumber, out var packetNumber); result = new HandshakePacket(version, destinationConnectionId, sourceConnectionId, packetNumber, payload); return(true); }