Android: patch

component/dialer/dialer.go

@@ -70,6 +70,9 @@ func DialContext(ctx context.Context, network, address string, options ...Option
 }
 
 func ListenPacket(ctx context.Context, network, address string, options ...Option) (net.PacketConn, error) {
+	if DefaultSocketHook != nil {
+		return listenPacketHooked(ctx, network, address)
+	}
 	cfg := applyOptions(options...)
 
 	lc := &net.ListenConfig{}
@@ -110,6 +113,9 @@ func GetTcpConcurrent() bool {
 }
 
 func dialContext(ctx context.Context, network string, destination netip.Addr, port string, opt *option) (net.Conn, error) {
+	if DefaultSocketHook != nil {
+		return dialContextHooked(ctx, network, destination, port)
+	}
 	address := net.JoinHostPort(destination.String(), port)
 
 	netDialer := opt.netDialer

component/dialer/patch.go

@@ -0,0 +1,47 @@
+package dialer
+
+import (
+	"context"
+	"net"
+	"net/netip"
+	"syscall"
+)
+
+type TunnelDialer func(context context.Context, network, address string) (net.Conn, error)
+type SocketControl func(network, address string, conn syscall.RawConn) error
+
+var DefaultTunnelDialer TunnelDialer
+var DefaultSocketHook SocketControl
+
+func DialTunnelContext(ctx context.Context, network, address string) (net.Conn, error) {
+	if dialer := DefaultTunnelDialer; dialer != nil {
+		return dialer(ctx, network, address)
+	}
+
+	return DialContext(ctx, network, address)
+}
+
+func dialContextHooked(ctx context.Context, network string, destination netip.Addr, port string) (net.Conn, error) {
+	dialer := &net.Dialer{
+		Control: DefaultSocketHook,
+	}
+
+	conn, err := dialer.DialContext(ctx, network, net.JoinHostPort(destination.String(), port))
+	if err != nil {
+		return nil, err
+	}
+
+	if t, ok := conn.(*net.TCPConn); ok {
+		t.SetKeepAlive(false)
+	}
+
+	return conn, nil
+}
+
+func listenPacketHooked(ctx context.Context, network, address string) (net.PacketConn, error) {
+	lc := &net.ListenConfig{
+		Control: DefaultSocketHook,
+	}
+
+	return lc.ListenPacket(ctx, network, address)
+}