How to make "divert-to" and "dirvet-reply" work

[boyd yang]

Hi All,

The "divert-to" and "divert-reply" function seems wonderful in the
document: man pf.conf
     divert-to <host> port <port>
           Used to redirect packets to a local socket bound to host and
port.
           The packets will not be modified, so getsockname(2) on the socket
           will return the original destination address of the packet.

     divert-reply
           Used to receive replies for sockets that are bound to addresses
           which are not local to the machine.  See setsockopt(2) for
informa-
           tion on how to bind these sockets.

But they do not work.
Below two patches do not work either.
https://lists.freebsd.org/pipermail/freebsd-net/2009-June/022166.html
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=188511

How to implement the two functions?

My OS is FreeBSD 10.3 amd64.

I want that binding not-local address socket can connect successfully to
another server.
But now the socket cannot get SYN ACK packet.