OpenVPN routing mesh?

[tdi]

I have openvpn star topology (server -> 3 clients) up and running on RC-2:

c1
   
     
        S–---c3
        /
      /
  c2

where LAN subnets could be something like:

S - 192.168.0.0/24
c1 - 192.168.1.0/24
c2 - 192.168.2.0/24
c3 - 192.168.3.0/24

Clients had no problems reaching S subnet (push route statement), but for S to reach c subnets i had to make static routes on tun0.

I would like to make vpn tunnels between 3 clients, each site advertising its own subnet:

c1------------
  |  \        |
  |    \        |
  |      S-----c3
  |      /      |
  |    /      |
  c2------------

so that c1 can reach c2 or c3 without going through S.

What would be the best way of achieving this?
Should I create vpn server on each c site?
Is there a better way to exchange routes (ospfd or some other routed)?

Any links/howto's/tutorials are greatly appreciated.

[MrMoo]

You can create all the other connections in the same manner, its highly likely that if one connection fails, e.g. C1 to C2 that either C1 to S or C2 to S will also fail.

Alternatively you can try configuring OSLR above the OpenVPN connections.  You probably need to specify each connection as a different network so regular routing doesn't go through the VPN directly.