move the PacketHeader struct from logging to qlog package

qlog/packet_header.go

@@ -24,6 +24,21 @@ func getPacketTypeFromEncryptionLevel(encLevel protocol.EncryptionLevel) packetT
 	return packetType(t)
 }
 
+// PacketHeader is a QUIC packet header.
+type packetHeader struct {
+	PacketType logging.PacketType
+
+	PacketNumber  logging.PacketNumber
+	PayloadLength logging.ByteCount
+	// Size of the QUIC packet (QUIC header + payload).
+	// See https://github.com/quiclog/internet-drafts/issues/40.
+	PacketSize logging.ByteCount
+
+	Version          logging.VersionNumber
+	SrcConnectionID  logging.ConnectionID
+	DestConnectionID logging.ConnectionID
+}
+
 func transformHeader(hdr *wire.Header) *packetHeader {
 	return &packetHeader{
 		PacketType:       logging.PacketTypeFromHeader(hdr),
@@ -40,9 +55,6 @@ func transformExtendedHeader(hdr *wire.ExtendedHeader) *packetHeader {
 	return h
 }
 
-// We don't log the packet type as a part of the header yet, see https://github.com/quiclog/internet-drafts/issues/40.
-type packetHeader logging.PacketHeader
-
 func (h packetHeader) MarshalJSONObject(enc *gojay.Encoder) {
 	if h.PacketType != logging.PacketTypeRetry && h.PacketType != logging.PacketTypeVersionNegotiation {
 		enc.Int64Key("packet_number", int64(h.PacketNumber))