return nil, err
	}
	return newTCPConn(fd, sd.Dialer.KeepAlive, sd.Dialer.KeepAliveConfig, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
}

func (ln *TCPListener) ok() bool { return ln != nil && ln.fd != nil && ln.fd.ctl != nil }

func (ln *TCPListener) accept() (*TCPConn, error) {
	fd, err := ln.fd.acceptPlan9()
	if err != nil {
		return nil, err
	}

	fd.setAddr(laddr, raddr)
	return fd, nil
}

func fileConn(f *os.File) (Conn, error) {
	fd, err := newFileFD(f)
	if err != nil {
		return nil, err
	}
	switch fd.laddr.(type) {
	case *TCPAddr:
		return newTCPConn(fd, defaultTCPKeepAliveIdle, KeepAliveConfig{}, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
	case *UDPAddr:
		return newUDPConn(fd), nil
	case *IPAddr:
		return newIPConn(fd), nil
	case *UnixAddr:

		if err == nil {
			fd.Close()
		}
		fd, err = internetSocket(ctx, sd.network, laddr, raddr, syscall.SOCK_STREAM, proto, "dial", ctrlCtxFn)
	}

	if err != nil {
		return nil, err
	}
	return newTCPConn(fd, sd.Dialer.KeepAlive, sd.Dialer.KeepAliveConfig, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
}

func selfConnect(fd *netFD, err error) bool {
	// If the connect failed, we clearly didn't connect to ourselves.

	if !fd.ok() {
		return nil, syscall.EINVAL
	}

	fd.data, err = os.OpenFile(fd.dir+"/data", os.O_RDWR, 0)
	if err != nil {
		return nil, err
	}

	switch fd.laddr.(type) {
	case *TCPAddr:
		return newTCPConn(fd, defaultTCPKeepAliveIdle, KeepAliveConfig{}, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
	case *UDPAddr:
		return newUDPConn(fd), nil
	}
	return nil, syscall.EPLAN9
}

// the results.
func (c *TCPConn) MultipathTCP() (bool, error) {
	if !c.ok() {
		return false, syscall.EINVAL
	}
	return isUsingMultipathTCP(c.fd), nil
}

func newTCPConn(fd *netFD, keepAliveIdle time.Duration, keepAliveCfg KeepAliveConfig, preKeepAliveHook func(*netFD), keepAliveHook func(KeepAliveConfig)) *TCPConn {
	setNoDelay(fd, true)
	if !keepAliveCfg.Enable && keepAliveIdle >= 0 {

String id=133
	data="net.setKeepAlivePeriod"
String id=134
	data="/usr/local/google/home/mknyszek/work/go-1/src/net/tcpsockopt_unix.go"
String id=135
	data="net.newTCPConn"
String id=136
	data="syscall.Close"
String id=137
	data="internal/poll.(*SysFile).destroy"
String id=138
	data="/usr/local/google/home/mknyszek/work/go-1/src/internal/poll/fd_unixjs.go"
String id=139