bird/proto/static/static.c
Martin Mares 7dc4827c96 Added everything protocols need to know about multiple routing tables,
i.e. struct proto now contains field 'table' pointing to routing table
the protocol is attached to. Use this instead of &master_table.

Modified all protocols except the kernel syncer to use this field.
1999-03-26 21:50:43 +00:00

180 lines
3.6 KiB
C

/*
* 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,
};