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/*
* BIRD -- OSPF
*
* (c) 1999 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "ospf.h"
static int
ospf_start(struct proto *p)
{
struct proto_ospf *po=(struct proto_ospf *)p;
DBG("%s: Start\n",p->name);
p->if_notify=ospf_if_notify;
p->rte_better=ospf_rte_better;
p->rte_same=ospf_rte_same;
fib_init(&po->efib,p->pool,sizeof(struct extfib),16,init_efib);
return PS_UP;
}
static void
ospf_dump(struct proto *p)
{
char areastr[20];
struct ospf_iface *ifa;
struct ospf_neighbor *n;
struct ospf_config *c = (void *) p->cf;
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_area *oa;
debug("%s: Area number: %d\n", p->name, po->areano);
WALK_LIST(ifa, po->iface_list)
{
debug("%s: Interface: %s\n", p->name, ifa->iface->name);
debug("%s: state: %u\n", p->name, ifa->state);
debug("%s: DR: %I\n", p->name, ifa->drid);
debug("%s: BDR: %I\n", p->name, ifa->bdrid);
WALK_LIST(n, ifa->neigh_list)
{
debug("%s: neighbor %I in state %u\n", p->name, n->rid, n->state);
}
}
WALK_LIST(NODE oa,po->area_list)
{
debug("\n%s: LSA graph dump for area \"%I\" start:\n", p->name,oa->areaid);
ospf_top_dump(oa->gr);
debug("%s: LSA graph dump for area \"%I\" finished\n\n", p->name,
oa->areaid);
}
neigh_dump_all();
}
static struct proto *
ospf_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct proto_ospf));
struct proto_ospf *po=(struct proto_ospf *)p;
DBG(" OSPF: Init.\n");
p->neigh_notify = NULL;
p->if_notify = NULL;
init_list(&(po->iface_list));
init_list(&(po->area_list));
p->import_control = ospf_import_control;
p->rt_notify = ospf_rt_notify;
return p;
}
/* If new is better return 1 */
static int
ospf_rte_better(struct rte *new, struct rte *old)
{
struct proto *p = new->attrs->proto;
if(new->u.ospf.metric1=LSINFINITY) return 0;
if(((new->attrs->source==RTS_OSPF) || (new->attrs->source==RTS_OSPF_IA))
&& (old->attrs->source==RTS_OSPF_EXT)) return 1;
if(((old->attrs->source==RTS_OSPF) || (old->attrs->source==RTS_OSPF_IA))
&& (new->attrs->source==RTS_OSPF_EXT)) return 0;
if(new->u.ospf.metric2!=0)
{
if(old->u.ospf.metric2==0) return 0;
if(new->u.ospf.metric2<old->u.ospf.metric2) return 1;
return 0;
}
else
{
if(old->u.ospf.metric2!=0) return 1;
if(new->u.ospf.metric1<old->u.ospf.metric1) return 1;
return 0;
}
}
static int
ospf_rte_same(struct rte *new, struct rte *old)
{
struct proto *p = new->attrs->proto;
if(new->attrs->source!=old->attrs->source) return 0;
if(new->u.ospf.metric1!=old->u.ospf.metric1) return 0;
if(new->u.ospf.metric2!=old->u.ospf.metric2) return 0;
return 1;
}
int
ospf_import_control(struct proto *p, rte **new, ea_list **attrs, struct linpool *pool)
{
rte *e=*new;
struct proto_ospf *po=(struct proto_ospf *)p;
if(p==e->attrs->proto) return -1;
return 0;
}
static int
ospf_shutdown(struct proto *p)
{
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_iface *ifa;
struct ospf_neighbor *n;
struct ospf_area *oa;
debug("%s: Shutdown requested\n", p->name);
/* first of all flush my rt LSA */
WALK_LIST(oa,po->area_list)
{
net_flush_lsa(oa->rt,po,oa);
}
/* And send to all my neighbors 1WAY */
WALK_LIST(ifa, po->iface_list)
{
WALK_LIST(n, ifa->neigh_list) neigh_chstate(n,NEIGHBOR_DOWN);
hello_timer_hook(ifa->hello_timer);
}
return PS_DOWN;
}
void
ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old, ea_list *attrs)
{
struct proto_ospf *po=(struct proto_ospf *)p;
debug("%s: Got route %I/%d %s\n", p->name, n->n.prefix,
n->n.pxlen, new ? "up" : "down");
if(new) /* Got some new route */
{
originate_ext_lsa(n, old, po);
}
else
{
u32 rtid=po->proto.cf->global->router_id;
struct ospf_area *oa;
struct top_hash_entry *en;
/* Flush old external LSA */
WALK_LIST(oa, po->area_list)
{
if(en=ospf_hash_find(oa->gr, ipa_to_u32(n->n.prefix), rtid, LSA_T_EXT))
net_flush_lsa(en,po,oa);
}
}
}
struct protocol proto_ospf = {
name: "OSPF",
template: "ospf%d",
init: ospf_init,
dump: ospf_dump,
start: ospf_start,
shutdown: ospf_shutdown
};
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