bird/proto/ospf/ospf.c
2000-06-01 15:53:06 +00:00

334 lines
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;
}
void
schedule_rt_lsa(struct ospf_area *oa)
{
struct proto_ospf *po=oa->po;
struct proto *p=&po->proto;
debug("%s: Scheduling RT lsa origination for area %I.\n", p->name,
oa->areaid);
oa->origrt=1;
}
void
schedule_rtcalc(struct ospf_area *oa)
{
struct proto_ospf *po=oa->po;
struct proto *p=&po->proto;
debug("%s: Scheduling RT calculation for area %I.\n", p->name,
oa->areaid);
oa->calcrt=1;
}
void
area_disp(timer *timer)
{
struct ospf_area *oa=timer->data;
struct top_hash_entry *en,*nxt;
/* First of all try to age LSA DB */
ospf_age(oa);
/* Now try to originage rt_lsa */
if(oa->origrt) originate_rt_lsa(oa);
oa->origrt=0;
if(oa->calcrt) ospf_rt_spfa(oa);
oa->calcrt=0;
}
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 && rte->u.ospf.tag)
{
buf += bsprintf(buf, " [%x]", 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
};
void
ospf_sh_neigh(struct proto *p)
{
struct ospf_iface *ifa;
struct ospf_neighbor *n;
struct proto_ospf *po=(struct proto_ospf *)p;
cli_msg(-1013,"%s:",p->name);
cli_msg(-1013,"%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s","Router ID","Pri",
" State", "DTime", "Router IP", "Interface");
WALK_LIST(ifa,po->iface_list)
WALK_LIST(n, ifa->neigh_list)
ospf_sh_neigh_info(n);
cli_msg(0,"");
}