Most things work fine now, except:

- UDP support has been temporarily removed, pending upstream QUIC library support for unreliable messages
- SOCKS5 server needs some rework
- Authentication

pkg/core/protocol.go

@@ -0,0 +1,45 @@
+package core
+
+import (
+	"time"
+)
+
+const (
+	protocolVersion = uint8(1)
+	protocolTimeout = 10 * time.Second
+
+	closeErrorCodeGeneric  = 0
+	closeErrorCodeProtocol = 1
+	closeErrorCodeAuth     = 2
+)
+
+type transmissionRate struct {
+	SendBPS uint64
+	RecvBPS uint64
+}
+
+type clientHello struct {
+	Rate    transmissionRate
+	AuthLen uint16 `struc:"sizeof=Auth"`
+	Auth    []byte
+}
+
+type serverHello struct {
+	OK         bool
+	Rate       transmissionRate
+	MessageLen uint16 `struc:"sizeof=Message"`
+	Message    string
+}
+
+type clientRequest struct {
+	UDP        bool
+	AddressLen uint16 `struc:"sizeof=Address"`
+	Address    string
+}
+
+type serverResponse struct {
+	OK           bool
+	UDPSessionID uint32
+	MessageLen   uint16 `struc:"sizeof=Message"`
+	Message      string
+}