Commit bdb95a21 authored by Martin Mareš's avatar Martin Mareš
Browse files

Added skeletal version of Linux netlink interface. It doesn't work yet,

but the framework is there and I'll try finish it soon.
parent ea3582a6
......@@ -24,6 +24,8 @@ Core
- kernel: RTM_F_NOTIFY seems to be unimplemented
- kernel: RTM_DELROUTE not announced for device routes
- netlink: import Linux route attributes to our rta's, so that they can be filtered?
Cleanup
~~~~~~~
- right usage of DBG vs. debug
......
/*
* Configuration for Linux 2.1 based systems
*
* (c) 1998 Martin Mares <mj@ucw.cz>
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
......@@ -13,6 +13,7 @@
#define CONFIG_ALL_MULTICAST
/*
Link: sysdep/linux/netlink
Link: sysdep/linux
Link: sysdep/unix
*/
#ifdef CONFIG_NETLINK
netlink.c
#else
#ifndef CONFIG_NETLINK
krt-scan.c
krt-scan.h
krt-scan.Y
......
/*
* BIRD -- Netlink Interface Configuration
*
* (c) 1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "lib/krt.h"
#define KRT_PROTO ((struct krt_config *) this_proto)
CF_DECLS
CF_KEYWORDS(KERNEL, PERSIST, ROUTE, SCAN, TIME, LEARN)
CF_GRAMMAR
/* Kernel protocol */
CF_ADDTO(proto, kern_proto '}')
kern_proto_start: proto_start KERNEL {
if (!(this_proto = cf_krt)) cf_error("Kernel protocol already defined");
cf_krt = NULL;
}
;
kern_proto:
kern_proto_start '{'
| kern_proto proto_item ';'
| kern_proto kern_item ';'
;
kern_item:
PERSIST bool { KRT_PROTO->persist = $2; }
| SCAN TIME expr { KRT_PROTO->scan_time = $3; }
| LEARN bool { KRT_PROTO->learn = $2; }
| ROUTE SCAN TIME expr { KRT_PROTO->route_scan_time = $4; }
;
CF_CODE
CF_END
/*
* BIRD -- Linux Netlink Interface
*
* (c) 1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/socket.h>
#include "nest/bird.h"
#include "nest/route.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "lib/timer.h"
#include "lib/unix.h"
#include "lib/krt.h"
/*
* We need to work around namespace conflicts between us and the kernel,
* but I prefer this way to being forced to rename our configuration symbols.
* This will disappear as soon as netlink headers become part of the libc.
*/
#undef CONFIG_NETLINK
#include <linux/config.h>
#ifndef CONFIG_NETLINK
#error "Kernel not configured to support netlink"
#endif
#include <asm/types.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#define LOCAL_DEBUG
struct proto_config *cf_krt;
static void
krt_preconfig(struct protocol *x, struct config *c)
{
struct krt_config *z = proto_config_new(&proto_unix_kernel, sizeof(struct krt_config));
cf_krt = &z->c;
z->c.preference = DEF_PREF_UKR;
}
static struct proto *
krt_init(struct proto_config *c)
{
struct krt_proto *p = proto_new(c, sizeof(struct krt_proto));
return &p->p;
}
static int
krt_start(struct proto *p)
{
/* FIXME: Filter kernel routing table etc. */
return PS_UP;
}
static int
krt_shutdown(struct proto *p)
{
/* FIXME: Remove all our routes from the kernel */
return PS_DOWN;
}
void
scan_if_init(void)
{
/* FIXME: What to do here? */
}
struct protocol proto_unix_kernel = {
name: "Kernel",
preconfig: krt_preconfig,
init: krt_init,
start: krt_start,
shutdown: krt_shutdown
};
/*
* BIRD -- Linux Netlink Interface
*
* (c) 1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_NETLINK_KRT_H_
#define _BIRD_NETLINK_KRT_H_
extern struct protocol proto_unix_kernel;
struct krt_config {
struct proto_config c;
int persist; /* Keep routes when we exit */
int scan_time; /* How often we re-scan interfaces */
int route_scan_time; /* How often we re-scan routes */
int learn; /* Learn routes from other sources */
};
extern struct proto_config *cf_krt;
struct krt_proto {
struct proto p;
};
void scan_if_init(void);
#endif
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