tailscale: Add tailssh server

experimental/libbox/native_shell_session.go

@@ -0,0 +1,78 @@
+//go:build linux || android || (darwin && !ios)
+
+package libbox
+
+import (
+	"github.com/sagernet/sing-box/protocol/tailscale/tailssh"
+	"github.com/sagernet/sing/common"
+)
+
+type nativeShellSession struct {
+	shell *tailssh.Shell
+}
+
+func OpenNativeShellSession(
+	shell, cwd string,
+	args, environ StringIterator,
+	term string,
+	rows, cols, uid, gid int32,
+	groups Int32Iterator,
+) (ShellSession, error) {
+	sh, err := tailssh.OpenPtyShell(
+		shell,
+		iteratorToArray[string](args),
+		iteratorToArray[string](environ),
+		cwd,
+		int(uid), int(gid),
+		common.Map(iteratorToArray[int32](groups), func(g int32) int { return int(g) }),
+		uint16(rows), uint16(cols),
+	)
+	if err != nil {
+		return nil, err
+	}
+	return &nativeShellSession{shell: sh}, nil
+}
+
+func OpenNativePipeSession(
+	shell, cwd string,
+	args, environ StringIterator,
+	uid, gid int32,
+	groups Int32Iterator,
+) (ShellSession, error) {
+	sh, err := tailssh.OpenSocketpairShell(
+		shell,
+		iteratorToArray[string](args),
+		iteratorToArray[string](environ),
+		cwd,
+		int(uid), int(gid),
+		common.Map(iteratorToArray[int32](groups), func(g int32) int { return int(g) }),
+	)
+	if err != nil {
+		return nil, err
+	}
+	return &nativeShellSession{shell: sh}, nil
+}
+
+func (s *nativeShellSession) MasterFD() int32 {
+	return int32(s.shell.MasterFD())
+}
+
+func (s *nativeShellSession) Resize(rows, cols int32) error {
+	return s.shell.Resize(uint16(rows), uint16(cols))
+}
+
+func (s *nativeShellSession) Signal(sig int32) error {
+	return s.shell.Signal(int(sig))
+}
+
+func (s *nativeShellSession) WaitExit() (int32, error) {
+	status, err := s.shell.Wait()
+	if err != nil {
+		return 0, err
+	}
+	return int32(status), nil
+}
+
+func (s *nativeShellSession) Close() error {
+	return s.shell.Close()
+}