Function uapi::recvmsg

pub fn recvmsg<T: SockAddr + ?Sized>(
    sockfd: c_int, 
    msghdr: &mut MsghdrMut<T>, 
    flags: c_int
) -> Result<(usize, usize)>

recvmsg(2)

If the function returns successfully, msghdr.control has been replaced by the part filled with control messages.