[Openvpn-devel] how to implement the multi client in openvpn?

[oyk]

Hi，guys
   I want to know how the openvpn control the multi-client case in 2.0 version.
for example:
  clientA---Internet---|             |----Internal Server1
                       |----Server---|----Internal Server2
  clientB---Internet---|             |----Internal Server3

Based on my comprehension, clientA (10.1.0.2) and clientB (10.1.0.3) can make
a tunnel with Server (10.1.0.1) respectively using TCP connection.
clientA sockA----------Server SockA1
clientB sockB----------Server SockB1
When Server recieves the package from clientA or clientB, it pushs the packages
to the tun/tap device. And the Server box could route the package to the 
internal
server. And the internal server response the package to Server.

My question is: when OpenVPN Server recieves one package from one internal 
server,
how does it control the package and redirect to whom(clientA or clientB)?

   Please help, thanks!

PS: could I use windows version as OpenVPN Server?

Best Regards
   Ouyang Kai