n := "tcp6"
				if raddr.IP.To4() != nil {
					n = "tcp4"
				}
				if n == tt.teardownNetwork {
					return nil, errors.New("unreachable")
				}
				if r := raddr.IP.String(); r == slowDst4 || r == slowDst6 {
					<-ctx.Done()
					return nil, ctx.Err()
				}
				return &TCPConn{}, nil
			}

pkg math/rand/v2, func Uint() uint #61716
pkg math/rand/v2, method (*ChaCha8) Read([]uint8) (int, error) #67059
pkg math/rand/v2, method (*Rand) Uint() uint #61716
pkg net, method (*DNSError) Unwrap() error #63116
pkg net, method (*TCPConn) SetKeepAliveConfig(KeepAliveConfig) error #62254
pkg net, type DNSError struct, UnwrapErr error #63116
pkg net, type Dialer struct, KeepAliveConfig KeepAliveConfig #62254
pkg net, type KeepAliveConfig struct #62254

	}

	connChan := make(chan any, 1)
	go func() {
		tcpConn, err := l.Accept()
		if err != nil {
			connChan <- err
			return
		}
		connChan <- tcpConn
	}()

	var tcpConn net.Conn
	select {
	case connOrError := <-connChan:
		if err, ok := connOrError.(error); ok {
			return nil, nil, err
		}
		tcpConn = connOrError.(net.Conn)
	case <-time.After(2 * time.Second):

	c.LocalAddr()
	c.RemoteAddr()
	c.SetDeadline(time.Now().Add(someTimeout))
	c.SetReadDeadline(time.Now().Add(someTimeout))
	c.SetWriteDeadline(time.Now().Add(someTimeout))

	if _, err := c.Write([]byte("TCPCONN TEST")); err != nil {
		t.Fatal(err)
	}
	rb := make([]byte, 128)
	if _, err := c.Read(rb); err != nil {
		t.Fatal(err)
	}

	for err := range ch {
		t.Error(err)
	}
}

		if err != nil {
			t.Fatal(err)
		}
		defer c.Close()

		for i := 0; i < 3; i++ {
			err = c.(*TCPConn).CloseRead()
			if perr := parseCloseError(err, true); perr != nil {
				t.Errorf("#%d: %v", i, perr)
			}
		}
		for i := 0; i < 3; i++ {
			err = c.(*TCPConn).CloseWrite()
			if perr := parseCloseError(err, true); perr != nil {
				t.Errorf("#%d: %v", i, perr)
			}
		}

type tcpKeepAliveListener struct {
	net.Listener
}

func (ln tcpKeepAliveListener) Accept() (net.Conn, error) {
	c, err := ln.Listener.Accept()
	if err != nil {
		return nil, err
	}
	if tc, ok := c.(*net.TCPConn); ok {
		tc.SetKeepAlive(true)
		tc.SetKeepAlivePeriod(defaultKeepAlivePeriod)
	}
	return c, nil
}

// tlsHandshakeErrorWriter writes TLS handshake errors to klog with

pkg math/rand/v2, type Rand struct #61716
pkg math/rand/v2, type Source interface { Uint64 } #61716
pkg math/rand/v2, type Source interface, Uint64() uint64 #61716
pkg math/rand/v2, type Zipf struct #61716
pkg net, method (*TCPConn) WriteTo(io.Writer) (int64, error) #58808
pkg net/http, func FileServerFS(fs.FS) Handler #51971
pkg net/http, func NewFileTransportFS(fs.FS) RoundTripper #51971

pkg mime/multipart, type FileHeader struct, Size int64
pkg mime/multipart, var ErrMessageTooLarge error
pkg net, method (*IPConn) SyscallConn() (syscall.RawConn, error)
pkg net, method (*TCPConn) SyscallConn() (syscall.RawConn, error)
pkg net, method (*UDPConn) SyscallConn() (syscall.RawConn, error)
pkg net, method (*UnixConn) SyscallConn() (syscall.RawConn, error)

	if !called {
		t.Error("internal/poll.SendFile was not called, want it to be")
		return
	}
	if !gotHandled {
		t.Error("internal/poll.SendFile did not handle the write, want it to")
		return
	}
	if &wantConn.(*TCPConn).fd.pfd != gotFD {
		t.Error("internal.poll.SendFile called with unexpected FD")
	}
}

func TestSendfile(t *testing.T) {
	ln := newLocalListener(t, "tcp")
	defer ln.Close()

	errc := make(chan error, 1)

		{"(*TCPConn).SetKeepAlive", Method, 0},
		{"(*TCPConn).SetKeepAlivePeriod", Method, 2},
		{"(*TCPConn).SetLinger", Method, 0},
		{"(*TCPConn).SetNoDelay", Method, 0},
		{"(*TCPConn).SetReadBuffer", Method, 0},
		{"(*TCPConn).SetReadDeadline", Method, 0},
		{"(*TCPConn).SetWriteBuffer", Method, 0},
		{"(*TCPConn).SetWriteDeadline", Method, 0},
		{"(*TCPConn).SyscallConn", Method, 9},
		{"(*TCPConn).Write", Method, 0},