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std::net: add warning in Ipv6Addr::is_unicast_site_local() doc

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site-local addresses are deprecated, so we should warn users about it.
This commit is contained in:
Corentin Henry 2019-04-23 10:38:26 +02:00
parent 66627777b5
commit 634dcd00b4
1 changed files with 8 additions and 0 deletions
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8
src/libstd/net/ip.rs
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@ -1335,6 +1335,14 @@ impl Ipv6Addr {
/// assert_eq!(Ipv6Addr::new(0xfec2, 0, 0, 0, 0, 0, 0, 0).is_unicast_site_local(), true);
/// }
/// ```
///
/// # Warning
///
/// As per [RFC 3879], the whole `FEC0::/10` prefix is
/// deprecated. New software must not support site-local
/// addresses.
///
/// [RFC 3879]: https://tools.ietf.org/html/rfc3879
pub fn is_unicast_site_local(&self) -> bool {
(self.segments()[0] & 0xffc0) == 0xfec0
}