chore: embed hysteria, clean irrelevant codes, code from https://github.com/HyNetwork/hysteria

transport/hysteria/transport/client.go

@@ -0,0 +1,106 @@
+package transport
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"github.com/Dreamacro/clash/component/resolver"
+	"github.com/Dreamacro/clash/transport/hysteria/conns/faketcp"
+	"github.com/Dreamacro/clash/transport/hysteria/conns/udp"
+	"github.com/Dreamacro/clash/transport/hysteria/conns/wechat"
+	"github.com/Dreamacro/clash/transport/hysteria/obfs"
+	"github.com/Dreamacro/clash/transport/hysteria/utils"
+	"github.com/lucas-clemente/quic-go"
+	"net"
+)
+
+type ClientTransport struct {
+	Dialer        *net.Dialer
+	PrefEnabled   bool
+	PrefIPv6      bool
+	PrefExclusive bool
+}
+
+func (ct *ClientTransport) quicPacketConn(proto string, server string, obfs obfs.Obfuscator, dialer PacketDialer) (net.PacketConn, error) {
+	if len(proto) == 0 || proto == "udp" {
+		conn, err := dialer.ListenPacket()
+		if err != nil {
+			return nil, err
+		}
+		if obfs != nil {
+			oc := udp.NewObfsUDPConn(conn, obfs)
+			return oc, nil
+		} else {
+			return conn, nil
+		}
+	} else if proto == "wechat-video" {
+		conn, err := dialer.ListenPacket()
+		if err != nil {
+			return nil, err
+		}
+		if obfs != nil {
+			oc := wechat.NewObfsWeChatUDPConn(conn, obfs)
+			return oc, nil
+		} else {
+			return conn, nil
+		}
+	} else if proto == "faketcp" {
+		var conn *faketcp.TCPConn
+		conn, err := faketcp.Dial("tcp", server)
+		if err != nil {
+			return nil, err
+		}
+		if obfs != nil {
+			oc := faketcp.NewObfsFakeTCPConn(conn, obfs)
+			return oc, nil
+		} else {
+			return conn, nil
+		}
+	} else {
+		return nil, fmt.Errorf("unsupported protocol: %s", proto)
+	}
+}
+
+type PacketDialer interface {
+	ListenPacket() (net.PacketConn, error)
+	Context() context.Context
+}
+
+func (ct *ClientTransport) QUICDial(proto string, server string, tlsConfig *tls.Config, quicConfig *quic.Config, obfs obfs.Obfuscator, dialer PacketDialer) (quic.Connection, error) {
+	ipStr, port, err := utils.SplitHostPort(server)
+	if err != nil {
+		return nil, err
+	}
+
+	ip, err := resolver.ResolveProxyServerHost(ipStr)
+	if err != nil {
+		return nil, err
+	}
+
+	serverUDPAddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", ip, port))
+	if err != nil {
+		return nil, err
+	}
+	pktConn, err := ct.quicPacketConn(proto, server, obfs, dialer)
+	if err != nil {
+		return nil, err
+	}
+	qs, err := quic.DialContext(dialer.Context(), pktConn, serverUDPAddr, server, tlsConfig, quicConfig)
+	if err != nil {
+		_ = pktConn.Close()
+		return nil, err
+	}
+	return qs, nil
+}
+
+func (ct *ClientTransport) DialTCP(raddr *net.TCPAddr) (*net.TCPConn, error) {
+	conn, err := ct.Dialer.Dial("tcp", raddr.String())
+	if err != nil {
+		return nil, err
+	}
+	return conn.(*net.TCPConn), nil
+}
+
+func (ct *ClientTransport) ListenUDP() (*net.UDPConn, error) {
+	return net.ListenUDP("udp", nil)
+}