platform: Add group interface

experimental/libbox/command_select.go

@@ -0,0 +1,59 @@
+package libbox
+
+import (
+	"encoding/binary"
+	"net"
+
+	"github.com/sagernet/sing-box/outbound"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/rw"
+)
+
+func (c *CommandClient) SelectOutbound(groupTag string, outboundTag string) error {
+	conn, err := c.directConnect()
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+	err = binary.Write(conn, binary.BigEndian, uint8(CommandSelectOutbound))
+	if err != nil {
+		return err
+	}
+	err = rw.WriteVString(conn, groupTag)
+	if err != nil {
+		return err
+	}
+	err = rw.WriteVString(conn, outboundTag)
+	if err != nil {
+		return err
+	}
+	return readError(conn)
+}
+
+func (s *CommandServer) handleSelectOutbound(conn net.Conn) error {
+	defer conn.Close()
+	groupTag, err := rw.ReadVString(conn)
+	if err != nil {
+		return err
+	}
+	outboundTag, err := rw.ReadVString(conn)
+	if err != nil {
+		return err
+	}
+	service := s.service
+	if service == nil {
+		return writeError(conn, E.New("service not ready"))
+	}
+	outboundGroup, isLoaded := service.instance.Router().Outbound(groupTag)
+	if !isLoaded {
+		return writeError(conn, E.New("selector not found: ", groupTag))
+	}
+	selector, isSelector := outboundGroup.(*outbound.Selector)
+	if !isSelector {
+		return writeError(conn, E.New("outbound is not a selector: ", groupTag))
+	}
+	if !selector.SelectOutbound(outboundTag) {
+		return writeError(conn, E.New("outbound not found in selector: ", outboundTag))
+	}
+	return writeError(conn, nil)
+}