[lwip-devel] [patch #8358] Allow more combinations of listening PCB for IPv6

[Joel Cunningham]

Follow-up Comment #5, patch #8358 (project lwip):

There's a great explanation on Stack Overflow of the different behaviors of
SO_REUSEADDR and SO_REUSEPORT on different platforms:

http://stackoverflow.com/questions/14388706/socket-options-so-reuseaddr-and-so-reuseport-how-do-they-differ-do-they-mean-t

On a BSD system, SO_REUSEADDR does allow a socket bound to INADDR_ANY and a
socket bound to a specific IP address at the same time.  The order of the
socket binds doesn't matter.

On a Linux system, binding to INADDR_ANY first prevents a second bind to the
same port with a specific IP.  But if the order of the binds are reversed,
it's allowed.

The Linux behavior seems strange to me and I would guess we would want to
adhere to the BSD behavior (grandfather of sockets)

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