RecvFromError

pub const RecvFromError = error{
    /// The socket is marked nonblocking and the requested operation would block, and
    /// there is no global event loop configured.
    WouldBlock,

    /// A remote host refused to allow the network connection, typically because it is not
    /// running the requested service.
    ConnectionRefused,

    /// Could not allocate kernel memory.
    SystemResources,

    ConnectionResetByPeer,
    ConnectionTimedOut,

    /// The socket has not been bound.
    SocketNotBound,

    /// The UDP message was too big for the buffer and part of it has been discarded
    MessageTooBig,

    /// The network subsystem has failed.
    NetworkSubsystemFailed,

    /// The socket is not connected (connection-oriented sockets only).
    SocketNotConnected,
} || UnexpectedError