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// This file is part of file-descriptors. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/file-descriptors/master/COPYRIGHT. No part of file-descriptors, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2018-2019 The developers of file-descriptors. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/file-descriptors/master/COPYRIGHT.
/// Whilst this is present in libc, it does not support useful derives.
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(C)]
pub struct sockaddr_nl
{
/// Socket address family, always `AF_NETLINK`.
nl_family: sa_family_t,
/// Always zero.
nl_pad: u16,
/// Technically, this actually Option<ProcessIdentifier> as `None` means 'let Linux kernel choose process identifier to use for port identifier'.
nl_pid: PortIdentifier,
/// Legacy multicast groups mask.
///
/// Instead, set this to `0` and then use `setsockopt(socket, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &group, size_of::<i32>())` with the enum `rtnetlink_groups` which contains constants starting `RTNLGRP_*`; these are the value of `group`.
///
/// Legacy groups mask used flags bits starting `RTMGRP_*` but there are far more group memberships possible then there are bits in `nl_groups`!
nl_groups: u32,
}
impl Default for sockaddr_nl
{
#[inline(always)]
fn default() -> Self
{
Self
{
nl_family: AF_NETLINK as sa_family_t,
nl_pad: 0,
nl_pid: PortIdentifier::current_process(),
nl_groups: 0,
}
}
}
impl SocketData for sockaddr_nl
{
type Address = PortIdentifier;
#[inline(always)]
fn family(&self) -> sa_family_t
{
self.nl_family
}
#[inline(always)]
fn address(&self) -> &Self::Address
{
&self.nl_pid
}
#[inline(always)]
fn display_format(&self, f: &mut Formatter, _address_length: usize) -> fmt::Result
{
write!(f, "netlink:{}", self.nl_pid)
}
}