mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-13 06:38:43 +00:00
280 lines
6.8 KiB
C
280 lines
6.8 KiB
C
/*
|
|
* 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;
|
|
debug("%s: Start\n",p->name);
|
|
|
|
fib_init(&po->efib,p->pool,sizeof(struct extfib),16,init_efib);
|
|
init_list(&(po->iface_list));
|
|
init_list(&(po->area_list));
|
|
po->areano=0;
|
|
|
|
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;
|
|
|
|
debug("OSPF: Init requested.\n");
|
|
p->import_control = ospf_import_control;
|
|
p->make_tmp_attrs = ospf_make_tmp_attrs;
|
|
p->store_tmp_attrs = ospf_store_tmp_attrs;
|
|
p->rt_notify = ospf_rt_notify;
|
|
p->if_notify = ospf_if_notify;
|
|
p->rte_better = ospf_rte_better;
|
|
p->rte_same = ospf_rte_same;
|
|
|
|
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)
|
|
{
|
|
/* new->attrs == old->attrs always */
|
|
return
|
|
new->u.ospf.metric1 == old->u.ospf.metric1 &&
|
|
new->u.ospf.metric2 == old->u.ospf.metric2 &&
|
|
new->u.ospf.tag == old->u.ospf.tag;
|
|
}
|
|
|
|
static ea_list *
|
|
ospf_build_attrs(ea_list *next, struct linpool *pool, u32 m1, u32 m2, u32 tag)
|
|
{
|
|
struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 3*sizeof(eattr));
|
|
|
|
l->next = next;
|
|
l->flags = EALF_SORTED;
|
|
l->count = 3;
|
|
l->attrs[0].id = EA_OSPF_METRIC1;
|
|
l->attrs[0].flags = 0;
|
|
l->attrs[0].type = EAF_TYPE_INT | EAF_TEMP;
|
|
l->attrs[0].u.data = m1;
|
|
l->attrs[1].id = EA_OSPF_METRIC2;
|
|
l->attrs[1].flags = 0;
|
|
l->attrs[1].type = EAF_TYPE_INT | EAF_TEMP;
|
|
l->attrs[1].u.data = m2;
|
|
l->attrs[2].id = EA_OSPF_TAG;
|
|
l->attrs[2].flags = 0;
|
|
l->attrs[2].type = EAF_TYPE_INT | EAF_TEMP;
|
|
l->attrs[2].u.data = tag;
|
|
return l;
|
|
}
|
|
|
|
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; /* Reject our own routes */
|
|
*attrs = ospf_build_attrs(*attrs, pool, 0, 0, 0); /* FIXME: Use better defaults? */
|
|
return 0; /* Leave decision to the filters */
|
|
}
|
|
|
|
struct ea_list *
|
|
ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool)
|
|
{
|
|
return ospf_build_attrs(NULL, pool, rt->u.ospf.metric1, rt->u.ospf.metric2, rt->u.ospf.tag);
|
|
}
|
|
|
|
void
|
|
ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
|
|
{
|
|
rt->u.ospf.metric1 = ea_get_int(attrs, EA_OSPF_METRIC1, 0);
|
|
rt->u.ospf.metric2 = ea_get_int(attrs, EA_OSPF_METRIC2, 0);
|
|
rt->u.ospf.tag = ea_get_int(attrs, EA_OSPF_TAG, 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);
|
|
|
|
/* And send to all my neighbors 1WAY */
|
|
WALK_LIST(ifa, po->iface_list)
|
|
{
|
|
init_list(&ifa->neigh_list);
|
|
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, new, po, attrs);
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
ospf_get_status(struct proto *p, byte *buf)
|
|
{
|
|
struct proto_ospf *po=(struct proto_ospf *)p;
|
|
|
|
if (p->proto_state == PS_DOWN) buf[0] = 0;
|
|
else
|
|
{
|
|
struct ospf_iface *ifa;
|
|
struct ospf_neighbor *n;
|
|
int adj=0;
|
|
|
|
WALK_LIST(ifa,po->iface_list)
|
|
WALK_LIST(n,ifa->neigh_list)
|
|
if(n->state==NEIGHBOR_FULL) adj=1;
|
|
|
|
if(adj==0) strcpy(buf, "Alone");
|
|
else strcpy(buf, "Running");
|
|
}
|
|
}
|
|
|
|
static void
|
|
ospf_get_route_info(rte *rte, byte *buf, ea_list *attrs)
|
|
{
|
|
char met=' ';
|
|
char type=' ';
|
|
|
|
if(rte->attrs->source==RTS_OSPF_EXT)
|
|
{
|
|
met='1';
|
|
type='E';
|
|
|
|
}
|
|
if(rte->u.ospf.metric2!=LSINFINITY) met='2';
|
|
if(rte->attrs->source==RTS_OSPF_IA) type='A';
|
|
if(rte->attrs->source==RTS_OSPF) type='I';
|
|
buf += bsprintf(buf, " %c", type);
|
|
if(met!=' ') buf += bsprintf(buf, "%c", met);
|
|
buf += bsprintf(buf, " (%d/%d)", rte->pref,
|
|
(rte->u.ospf.metric2==LSINFINITY) ? rte->u.ospf.metric1 :
|
|
rte->u.ospf.metric2);
|
|
if(rte->attrs->source==RTS_OSPF_EXT)
|
|
{
|
|
buf += bsprintf(buf, " [%d]", rte->u.ospf.tag);
|
|
}
|
|
}
|
|
|
|
static int
|
|
ospf_get_attr(eattr *a, byte *buf)
|
|
{
|
|
switch (a->id)
|
|
{
|
|
case EA_OSPF_METRIC1: bsprintf(buf, "metric1"); return GA_NAME;
|
|
case EA_OSPF_METRIC2: bsprintf(buf, "metric2"); return GA_NAME;
|
|
case EA_OSPF_TAG: bsprintf(buf, "tag: %08x", a->u.data); return GA_FULL;
|
|
default: return GA_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
struct protocol proto_ospf = {
|
|
name: "OSPF",
|
|
template: "ospf%d",
|
|
attr_class: EAP_OSPF,
|
|
init: ospf_init,
|
|
dump: ospf_dump,
|
|
start: ospf_start,
|
|
shutdown: ospf_shutdown,
|
|
get_route_info: ospf_get_route_info,
|
|
get_attr: ospf_get_attr,
|
|
get_status: ospf_get_status
|
|
};
|