The chief use case for this is when sockfd was allocated in a different network namespace and passed to the current process over a UNIX domain socket or similar. It allows the current process to use netfilterqueue to manage traffic in a different network namespace.
The chief use case for this is when
sockfd
was allocated in a different network namespace and passed to the current process over a UNIX domain socket or similar. It allows the current process to use netfilterqueue to manage traffic in a different network namespace.