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Netlink on FreeBSD support

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Netlink support was added to FreeBSD recently. It is not as full-featured
as its Linux counterpart yet, however the added subset is enough to make
a routing daemon work. Specifically, it supports multiple tables,
multipath, nexthops and nexthops groups. No MPLS support yet.

The attached change adds 'bsd-netlink’ sysconf target, allowing to build
both netlink & rtsock versions on FreeBSD.
This commit is contained in:
Alexander V. Chernikov 2022-12-09 15:59:06 +01:00 committed by Ondrej Zajicek
parent 3859e4efc1
commit a80cd47074
3 changed files with 42 additions and 1 deletions
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34
sysdep/cf/bsd-netlink.h Normal file
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@ -0,0 +1,34 @@
/*
* Configuration for FreeBSD based systems with netlink support
*
* (c) 2022 Alexander Chernikov <melifaro@FreeBSD.org>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#define CONFIG_AUTO_ROUTES
#define CONFIG_SELF_CONSCIOUS
#define CONFIG_MULTIPLE_TABLES
#define CONFIG_SINGLE_ROUTE
#define CONFIG_SKIP_MC_BIND
#define CONFIG_NO_IFACE_BIND
#define CONFIG_USE_HDRINCL
#define CONFIG_INCLUDE_SYSIO_H "sysdep/bsd/sysio.h"
#define CONFIG_INCLUDE_KRTSYS_H "sysdep/linux/krt-sys.h"
#define CONFIG_FREEBSD_NETLINK
#ifndef AF_MPLS
#define AF_MPLS 39
#endif
#ifndef SO_RCVBUFFORCE
#define SO_RCVBUFFORCE SO_RCVBUF
#endif
/*
Link: sysdep/unix
Link: sysdep/bsd-netlink
*/

2
sysdep/cf/linux.h
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@ -17,6 +17,8 @@
#define CONFIG_INCLUDE_SYSIO_H "sysdep/linux/sysio.h"
#define CONFIG_INCLUDE_KRTSYS_H "sysdep/linux/krt-sys.h"
#define CONFIG_LINUX_NETLINK
#define CONFIG_RESTRICTED_PRIVILEGES
#define CONFIG_INCLUDE_SYSPRIV_H "sysdep/linux/syspriv.h"

7
sysdep/linux/netlink.c
View file

@ -6,7 +6,6 @@
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <alloca.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
@ -28,10 +27,16 @@
#include "lib/hash.h"
#include "conf/conf.h"
#ifdef CONFIG_LINUX_NETLINK
#include <asm/types.h>
#include <linux/if.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#endif
#ifdef CONFIG_FREEBSD_NETLINK
#include <netlink/netlink.h>
#include <netlink/netlink_route.h>
#endif
#ifdef HAVE_MPLS_KERNEL
#include <linux/lwtunnel.h>