macro_rules! status_enum {
    ($v:vis enum $name:ident { $($variant:ident = $value:literal),*, }) => {
        #[derive(Debug)]
        $v enum $name { $($variant),*, Other(u16) }
        impl $name { pub fn from_code(c: u16) -> Self { match c { $($value => Self::$variant),*, x => Self::Other(x) } } }
        impl $name { pub fn to_code(&self) -> u16 { match self { $(Self::$variant => $value),*, Self::Other(x) => *x } } }
    };
}

status_enum!(
    pub enum Status {
        Trying = 100,
        Ringing = 180,
        CallIsBeingForwarded = 181,
        Queued = 182,
        SessionProgress = 183,
        Ok = 200,
        MultipleChoices = 300,
        MovedPermanently = 301,
        MovedTemporarily = 302,
        UseProxy = 305,
        AlternativeService = 380,
        BadRequest = 400,
        Unauthorized = 401,
        PaymentRequired = 402,
        Forbidden = 403,
        NotFound = 404,
        MethodNotAllowed = 405,
        NotAcceptable = 406,
        ProxyAuthenticationRequired = 407,
        RequestTimeout = 408,
        Gone = 410,
        RequestEntityTooLarge = 413,
        RequestURITooLarge = 414,
        UnsupportedMediaType = 415,
        UnsupportedURIScheme = 416,
        BadExtension = 420,
        ExtensionRequired = 421,
        IntervalTooBrief = 423,
        TemporarilyNotAvailable = 480,
        CallLegTransactionDoesNotExist = 481,
        LoopDetected = 482,
        TooManyHops = 483,
        AddressIncomplete = 484,
        Ambiguous = 485,
        BusyHere = 486,
        RequestTerminated = 487,
        NotAcceptableHere = 488,
        RequestPending = 491,
        Undecipherable = 493,
        InternalServerError = 500,
        NotImplemented = 501,
        BadGateway = 502,
        ServiceUnavailable = 503,
        ServerTimeout = 504,
        SIPVersionNotSupported = 505,
        MessageTooLarge = 513,
        BusyEverywhere = 600,
        Decline = 603,
        DoesNotExistAnywhere = 604,
        GlobalNotAcceptable = 606,
    }
);