support protocol quic between frpc and frps (#3198)

pkg/config/client.go

@@ -115,7 +115,7 @@ type ClientCommonConf struct {
 	Start []string `ini:"start" json:"start"`
 	// Start map[string]struct{} `json:"start"`
 	// Protocol specifies the protocol to use when interacting with the server.
-	// Valid values are "tcp", "kcp" and "websocket". By default, this value
+	// Valid values are "tcp", "kcp", "quic" and "websocket". By default, this value
 	// is "tcp".
 	Protocol string `ini:"protocol" json:"protocol"`
 	// TLSEnable specifies whether or not TLS should be used when communicating
@@ -228,7 +228,7 @@ func (cfg *ClientCommonConf) Validate() error {
 		}
 	}
 
-	if cfg.Protocol != "tcp" && cfg.Protocol != "kcp" && cfg.Protocol != "websocket" {
+	if cfg.Protocol != "tcp" && cfg.Protocol != "kcp" && cfg.Protocol != "websocket" && cfg.Protocol != "quic" {
 		return fmt.Errorf("invalid protocol")
 	}
 

pkg/config/server.go

@@ -46,6 +46,10 @@ type ServerCommonConf struct {
 	// value is 0, the server will not listen for KCP connections. By default,
 	// this value is 0.
 	KCPBindPort int `ini:"kcp_bind_port" json:"kcp_bind_port" validate:"gte=0,lte=65535"`
+	// QUICBindPort specifies the QUIC port that the server listens on.
+	// Set this value to 0 will disable this feature.
+	// By default, the value is 0.
+	QUICBindPort int `ini:"quic_bind_port" json:"quic_bind_port" validate:"gte=0,lte=65535"`
 	// ProxyBindAddr specifies the address that the proxy binds to. This value
 	// may be the same as BindAddr.
 	ProxyBindAddr string `ini:"proxy_bind_addr" json:"proxy_bind_addr"`

pkg/util/net/conn.go

@@ -22,6 +22,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	quic "github.com/lucas-clemente/quic-go"
+
 	"github.com/fatedier/frp/pkg/util/xlog"
 )
 
@@ -183,3 +185,29 @@ func (statsConn *StatsConn) Close() (err error) {
 	}
 	return
 }
+
+type wrapQuicStream struct {
+	quic.Stream
+	c quic.Connection
+}
+
+func QuicStreamToNetConn(s quic.Stream, c quic.Connection) net.Conn {
+	return &wrapQuicStream{
+		Stream: s,
+		c:      c,
+	}
+}
+
+func (conn *wrapQuicStream) LocalAddr() net.Addr {
+	if conn.c != nil {
+		return conn.c.LocalAddr()
+	}
+	return (*net.TCPAddr)(nil)
+}
+
+func (conn *wrapQuicStream) RemoteAddr() net.Addr {
+	if conn.c != nil {
+		return conn.c.RemoteAddr()
+	}
+	return (*net.TCPAddr)(nil)
+}