[Xorp-hackers] RFC: Use one socket per interface for receiving packets in the FEA.

[Ben Greear]

Here's a first attempt at using one rx socket per device, and binding to 
that particular
device.  This keeps us from receiving multicast traffic not destined for 
us when we are running
multiple instances of xorp on the same system.

This code appears to work, but it does not properly clean up sockets 
when devices
are un-configured.  I'll be working on that next.

This code will be less efficient than the old way if the OS doesn't support
SO_BINDTODEVICE, so I'll also add some code to mimic the old behaviour
in that case (ie, windows).

There's also some other cruft in there to deal with races around 
removing interfaces
and removing the OSPF multicast groups.  These changes have nothing in 
particular
to do with per-interface rx sockets.

Suggestions for improvements are welcome.

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com> 
Candela Technologies Inc  http://www.candelatech.com


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