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/*
* BIRD -- Static Route Generator
*
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#define LOCAL_DEBUG
#include <string.h>
#include "nest/bird.h"
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "conf/conf.h"
#include "static.h"
static void
static_install(struct proto *p, struct static_route *r, struct iface *ifa)
{
net *n;
rta a, *aa;
rte *e;
DBG("Installing static route %I/%d, rtd=%d\n", r->net, r->masklen, r->dest);
bzero(&a, sizeof(a));
a.proto = p;
a.source = (r->dest == RTD_DEVICE) ? RTS_STATIC_DEVICE : RTS_STATIC;
a.scope = SCOPE_UNIVERSE;
a.cast = RTC_UNICAST;
a.dest = r->dest;
a.tos = 0;
a.gw = r->via;
a.iface = ifa;
aa = rta_lookup(&a);
n = net_get(p->table, a.tos, r->net, r->masklen);
e = rte_get_temp(aa);
e->net = n;
e->pflags = 0;
rte_update(n, p, e);
}
static void
static_remove(struct proto *p, struct static_route *r)
{
net *n;
DBG("Removing static route %I/%d\n", r->net, r->masklen);
n = net_find(p->table, 0, r->net, r->masklen);
if (n)
rte_update(n, p, NULL);
}
static int
static_start(struct proto *p)
{
struct static_config *c = (void *) p->cf;
struct static_route *r;
DBG("Static: take off!\n");
WALK_LIST(r, c->other_routes)
switch (r->dest)
{
case RTD_ROUTER:
{
struct neighbor *n = neigh_find(p, &r->via, NEF_STICKY);
if (n)
{
r->chain = n->data;
n->data = r;
r->neigh = n;
if (n->iface)
static_install(p, r, n->iface);
}
else
log(L_ERR "Static route destination %I is invalid. Ignoring.\n", r->via);
break;
}
case RTD_DEVICE:
break;
default:
static_install(p, r, NULL);
}
return PS_UP;
}
static void
static_neigh_notify(struct neighbor *n)
{
struct proto *p = n->proto;
struct static_route *r;
DBG("Static: neighbor notify for %I: iface %p\n", n->addr, n->iface);
for(r=n->data; r; r=r->chain)
if (n->iface)
static_install(p, r, n->iface);
else
static_remove(p, r);
}
static void
static_dump_rt(struct static_route *r)
{
debug("%16I/%2d: ", r->net, r->masklen);
switch (r->dest)
{
case RTD_ROUTER:
debug("via %I\n", r->via);
break;
case RTD_DEVICE:
debug("dev %s\n", r->if_name);
break;
default:
debug("rtd %d\n", r->dest);
break;
}
}
static void
static_dump(struct proto *p)
{
struct static_config *c = (void *) p->cf;
struct static_route *r;
debug("Independent static routes:\n");
WALK_LIST(r, c->other_routes)
static_dump_rt(r);
debug("Device static routes:\n");
WALK_LIST(r, c->iface_routes)
static_dump_rt(r);
}
static void
static_if_notify(struct proto *p, unsigned flags, struct iface *new, struct iface *old)
{
struct static_route *r;
struct static_config *c = (void *) p->cf;
if (flags & IF_CHANGE_UP)
{
WALK_LIST(r, c->iface_routes)
if (!strcmp(r->if_name, new->name))
static_install(p, r, new);
}
else if (flags & IF_CHANGE_DOWN)
{
WALK_LIST(r, c->iface_routes)
if (!strcmp(r->if_name, old->name))
static_remove(p, r);
}
}
void
static_init_config(struct static_config *c)
{
c->c.preference = DEF_PREF_STATIC;
init_list(&c->iface_routes);
init_list(&c->other_routes);
}
static struct proto *
static_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct proto));
p->neigh_notify = static_neigh_notify;
p->if_notify = static_if_notify;
return p;
}
struct protocol proto_static = {
name: "Static",
init: static_init,
dump: static_dump,
start: static_start,
};
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