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// SPDX-License-Identifier: MIT

use netlink_packet_utils::{
    nla::{NlaBuffer, NlasIterator},
    DecodeError,
};

pub const ROUTE_HEADER_LEN: usize = 12;

buffer!(RouteMessageBuffer(ROUTE_HEADER_LEN) {
    address_family: (u8, 0),
    destination_prefix_length: (u8, 1),
    source_prefix_length: (u8, 2),
    tos: (u8, 3),
    table: (u8, 4),
    protocol: (u8, 5),
    scope: (u8, 6),
    kind: (u8, 7),
    flags: (u32, 8..ROUTE_HEADER_LEN),
    payload: (slice, ROUTE_HEADER_LEN..),
});

impl<'a, T: AsRef<[u8]> + ?Sized> RouteMessageBuffer<&'a T> {
    pub fn nlas(
        &self,
    ) -> impl Iterator<Item = Result<NlaBuffer<&'a [u8]>, DecodeError>> {
        NlasIterator::new(self.payload())
    }
}