The msg_name field points to a caller-allocated buffer that is used to return the source address if the socket is unconnected. The caller should set msg_namelen to the size of this buffer before this call; upon return from a successful call, msg_namelen will contain the length of the returned address. If the application does not need to know the source address, msg_name can be specified as NULL.
In case we use () msgname_len gets initialized with 0, but pointer to the array with msg_name. This works for the first iteration somehow, but after that kernel sets msgname_len to a non-zero and second invocation with the same MultiHeader fails
The msg_name field points to a caller-allocated buffer that is used to return the source address if the socket is unconnected. The caller should set msg_namelen to the size of this buffer before this call; upon return from a successful call, msg_namelen will contain the length of the returned address. If the application does not need to know the source address, msg_name can be specified as NULL.
In case we use () msgname_len gets initialized with 0, but pointer to the array with msg_name. This works for the first iteration somehow, but after that kernel sets msgname_len to a non-zero and second invocation with the same MultiHeader fails
What does this PR do
Fixes https://github.com/nix-rust/nix/issues/2506
Checklist:
CONTRIBUTING.md