ConnectError

pub const ConnectError = error{
    /// For UNIX domain sockets, which are identified by pathname: Write permission is denied on  the  socket
    /// file,  or  search  permission  is  denied  for  one of the directories in the path prefix.
    /// or
    /// The user tried to connect to a broadcast address without having the socket broadcast flag enabled  or
    /// the connection request failed because of a local firewall rule.
    AccessDenied,

    /// See AccessDenied
    PermissionDenied,

    /// Local address is already in use.
    AddressInUse,

    /// (Internet  domain  sockets)  The  socket  referred  to  by sockfd had not previously been bound to an
    /// address and, upon attempting to bind it to an ephemeral port, it was determined that all port numbers
    /// in    the    ephemeral    port    range    are   currently   in   use.    See   the   discussion   of
    /// /proc/sys/net/ipv4/ip_local_port_range in ip(7).
    AddressNotAvailable,

    /// The passed address didn't have the correct address family in its sa_family field.
    AddressFamilyNotSupported,

    /// Insufficient entries in the routing cache.
    SystemResources,

    /// A connect() on a stream socket found no one listening on the remote address.
    ConnectionRefused,

    /// Network is unreachable.
    NetworkUnreachable,

    /// Timeout  while  attempting  connection.   The server may be too busy to accept new connections.  Note
    /// that for IP sockets the timeout may be very long when syncookies are enabled on the server.
    ConnectionTimedOut,

    /// This error occurs when no global event loop is configured,
    /// and connecting to the socket would block.
    WouldBlock,

    /// The given path for the unix socket does not exist.
    FileNotFound,

    /// Connection was reset by peer before connect could complete.
    ConnectionResetByPeer,

    /// Socket is non-blocking and already has a pending connection in progress.
    ConnectionPending,
} || UnexpectedError