CFSocketCreateWithSocketSignature incompatible with SO_REUSEADDR

Originator:dairgrant
Number:rdar://13127171 Date Originated:31-Jan-2013
Status:Open Resolved:
Product:Documentation Product Version:N/A
Classification:Enhancemnet Reproducible:N/A
 
31-Jan-2013 08:57 PM Dair Grant:
CFSocketCreateWithSocketSignature creates a socket with CFSocketCreate+CFSocketSetAddress, and CFSocketSetAddress binds the socket.

This renders CFSocketCreateWithSocketSignature incompatible with SO_REUSEADDR/SO_REUSEPORT, as these options must be set after the socket is created but before the socket is bound.

I would like CFSocketCreateWithSocketSignature's documentation to be updated to point this out, as setsockopt does not provide an error when this option is set on a bound socket. As SO_REUSEADDR is probably the default behaviour you want for listening sockets (side-effects notwithstanding), this API is probably not a good choice for server code.

Alternatively CFSocketCreateWithSocketSignature could be deprecated, and a CFSocketCreateBoundSocket API introduced that could take some options to apply to the socket?

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