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

[Philip Gladstone]

Follow-up Comment #2, patch #8358 (project lwip):

I just added a piece of test code for linux which shows one of the uses of
SO_REUSEADDR for UDP. Essentially it disables the address comparison checks
when binding sockets so you can do more reuse. 

In my use case, I have a UDP server and need to know which local address was
used for the inbound packet. The standard unix approach is to bind a socket to
each address for the same port, and then to bind a socket to the wildcard
address (same port). If the packet arrives on the wildcard address socket,
then you know that you are missing a local address in the list of sockets. 

I have since realized that I could use one of the callback mechanisms in lwip
with UDP to fid the local address, but I was porting some linux code....



(file #33274)
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File name: reuse.c                        Size:1 KB


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