Re: [lwip-users] How to have two different sockets for IPv4 and IPv6

[Philip Gladstone]

On 4/8/15 23:37, Mohsin wrote:
> Philip Gladstone wrote
> > I have it working for UDP -- I listen on the same port on both IPv4 and
> > IPv6 and it works. I know that Simon merged my patch to make this type
> > of thing work in the current development version.
> I would be very grateful to you if you can mention that patch which worked
> for you.
> So, that atleast I can verify or implement it in my development.
https://savannah.nongnu.org/patch/?8358

The other possibility is that you need to set SO_REUSEADDR or SO_REUSEPORT

Philip