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https://gitlab.nic.cz/labs/bird.git
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511 lines
12 KiB
C
511 lines
12 KiB
C
/*
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* BIRD -- OSPF
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*
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* (c) 1999 Ondrej Filip <feela@network.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#include "ospf.h"
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static int
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ospf_start(struct proto *p)
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{
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struct proto_ospf *po=(struct proto_ospf *)p;
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struct ospf_config *c=(struct ospf_config *)(p->cf);
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struct ospf_area_config *ac;
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struct ospf_area *oa;
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OSPF_TRACE(D_EVENTS, "Start");
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fib_init(&po->efib,p->pool,sizeof(struct extfib),16,init_efib);
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init_list(&(po->iface_list));
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init_list(&(po->area_list));
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po->areano=0;
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if(EMPTY_LIST(c->area_list))
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{
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log("%s: Cannot start, no OSPF areas configured", p->name);
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return PS_DOWN;
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}
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WALK_LIST(ac,c->area_list)
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{
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oa=mb_allocz(po->proto.pool, sizeof(struct ospf_area));
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add_tail(&po->area_list,NODE oa);
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po->areano++;
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oa->stub=ac->stub;
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oa->tick=ac->tick;
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oa->areaid=ac->areaid;
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oa->gr=ospf_top_new(po);
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s_init_list(&(oa->lsal));
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oa->rt=NULL;
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oa->po=po;
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oa->disp_timer=tm_new(po->proto.pool);
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oa->disp_timer->data=oa;
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oa->disp_timer->randomize=0;
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oa->disp_timer->hook=area_disp;
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oa->disp_timer->recurrent=oa->tick;
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oa->lage=now;
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tm_start(oa->disp_timer,oa->tick);
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oa->calcrt=0;
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oa->origrt=0;
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fib_init(&oa->infib,po->proto.pool,sizeof(struct infib),16,init_infib);
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}
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return PS_UP;
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}
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static void
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ospf_dump(struct proto *p)
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{
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char areastr[20];
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struct ospf_iface *ifa;
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struct ospf_neighbor *n;
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struct ospf_config *c = (void *) p->cf;
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struct proto_ospf *po=(struct proto_ospf *)p;
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struct ospf_area *oa;
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OSPF_TRACE(D_EVENTS, "Area number: %d", po->areano);
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WALK_LIST(ifa, po->iface_list)
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{
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OSPF_TRACE(D_EVENTS, "Interface: %s", ifa->iface->name);
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OSPF_TRACE(D_EVENTS, "state: %u", ifa->state);
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OSPF_TRACE(D_EVENTS, "DR: %I", ifa->drid);
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OSPF_TRACE(D_EVENTS, "BDR: %I", ifa->bdrid);
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WALK_LIST(n, ifa->neigh_list)
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{
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OSPF_TRACE(D_EVENTS, " neighbor %I in state %u", n->rid, n->state);
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}
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}
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WALK_LIST(NODE oa,po->area_list)
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{
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OSPF_TRACE(D_EVENTS, "LSA graph dump for area \"%I\" start:", oa->areaid);
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ospf_top_dump(oa->gr,p);
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OSPF_TRACE(D_EVENTS, "LSA graph dump for area \"%I\" finished", oa->areaid);
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}
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neigh_dump_all();
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}
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static struct proto *
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ospf_init(struct proto_config *c)
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{
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struct proto *p = proto_new(c, sizeof(struct proto_ospf));
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struct proto_ospf *po=(struct proto_ospf *)p;
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struct ospf_config *oc=(struct ospf_config *)c;
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struct ospf_area_config *ac;
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struct ospf_iface_patt *patt;
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p->import_control = ospf_import_control;
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p->make_tmp_attrs = ospf_make_tmp_attrs;
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p->store_tmp_attrs = ospf_store_tmp_attrs;
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p->rt_notify = ospf_rt_notify;
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p->if_notify = ospf_if_notify;
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p->rte_better = ospf_rte_better;
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p->rte_same = ospf_rte_same;
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po->rfc1583=oc->rfc1583;
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return p;
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}
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/* If new is better return 1 */
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static int
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ospf_rte_better(struct rte *new, struct rte *old)
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{
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struct proto *p = new->attrs->proto;
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if(new->u.ospf.metric1=LSINFINITY) return 0;
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if(((new->attrs->source==RTS_OSPF) || (new->attrs->source==RTS_OSPF_IA))
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&& (old->attrs->source==RTS_OSPF_EXT)) return 1;
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if(((old->attrs->source==RTS_OSPF) || (old->attrs->source==RTS_OSPF_IA))
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&& (new->attrs->source==RTS_OSPF_EXT)) return 0;
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if(new->u.ospf.metric2!=0)
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{
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if(old->u.ospf.metric2==0) return 0;
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if(new->u.ospf.metric2<old->u.ospf.metric2) return 1;
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return 0;
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}
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else
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{
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if(old->u.ospf.metric2!=0) return 1;
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if(new->u.ospf.metric1<old->u.ospf.metric1) return 1;
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return 0;
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}
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}
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static int
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ospf_rte_same(struct rte *new, struct rte *old)
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{
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/* new->attrs == old->attrs always */
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return
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new->u.ospf.metric1 == old->u.ospf.metric1 &&
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new->u.ospf.metric2 == old->u.ospf.metric2 &&
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new->u.ospf.tag == old->u.ospf.tag;
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}
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static ea_list *
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ospf_build_attrs(ea_list *next, struct linpool *pool, u32 m1, u32 m2, u32 tag)
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{
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struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 3*sizeof(eattr));
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l->next = next;
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l->flags = EALF_SORTED;
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l->count = 3;
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l->attrs[0].id = EA_OSPF_METRIC1;
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l->attrs[0].flags = 0;
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l->attrs[0].type = EAF_TYPE_INT | EAF_TEMP;
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l->attrs[0].u.data = m1;
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l->attrs[1].id = EA_OSPF_METRIC2;
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l->attrs[1].flags = 0;
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l->attrs[1].type = EAF_TYPE_INT | EAF_TEMP;
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l->attrs[1].u.data = m2;
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l->attrs[2].id = EA_OSPF_TAG;
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l->attrs[2].flags = 0;
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l->attrs[2].type = EAF_TYPE_INT | EAF_TEMP;
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l->attrs[2].u.data = tag;
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return l;
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}
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void
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schedule_rt_lsa(struct ospf_area *oa)
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{
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struct proto_ospf *po=oa->po;
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struct proto *p=&po->proto;
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OSPF_TRACE(D_EVENTS, "Scheduling RT lsa origination for area %I.",
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oa->areaid);
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oa->origrt=1;
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}
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void
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schedule_rtcalc(struct ospf_area *oa)
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{
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struct proto_ospf *po=oa->po;
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struct proto *p=&po->proto;
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OSPF_TRACE(D_EVENTS, "Scheduling RT calculation for area %I.",
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oa->areaid);
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oa->calcrt=1;
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}
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void
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area_disp(timer *timer)
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{
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struct ospf_area *oa=timer->data;
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struct top_hash_entry *en,*nxt;
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/* First of all try to age LSA DB */
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ospf_age(oa);
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/* Now try to originage rt_lsa */
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if(oa->origrt) originate_rt_lsa(oa);
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oa->origrt=0;
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if(oa->calcrt) ospf_rt_spfa(oa);
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oa->calcrt=0;
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}
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int
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ospf_import_control(struct proto *p, rte **new, ea_list **attrs, struct linpool *pool)
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{
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rte *e=*new;
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struct proto_ospf *po=(struct proto_ospf *)p;
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if(p==e->attrs->proto) return -1; /* Reject our own routes */
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*attrs = ospf_build_attrs(*attrs, pool, LSINFINITY, 10000, 0);
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return 0; /* Leave decision to the filters */
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}
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struct ea_list *
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ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool)
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{
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return ospf_build_attrs(NULL, pool, rt->u.ospf.metric1, rt->u.ospf.metric2, rt->u.ospf.tag);
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}
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void
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ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
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{
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rt->u.ospf.metric1 = ea_get_int(attrs, EA_OSPF_METRIC1, LSINFINITY);
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rt->u.ospf.metric2 = ea_get_int(attrs, EA_OSPF_METRIC2, 10000);
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rt->u.ospf.tag = ea_get_int(attrs, EA_OSPF_TAG, 0);
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}
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static int
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ospf_shutdown(struct proto *p)
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{
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struct proto_ospf *po=(struct proto_ospf *)p;
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struct ospf_iface *ifa;
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struct ospf_neighbor *n;
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struct ospf_area *oa;
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OSPF_TRACE(D_EVENTS, "Shutdown requested");
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/* And send to all my neighbors 1WAY */
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WALK_LIST(ifa, po->iface_list)
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{
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init_list(&ifa->neigh_list);
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hello_timer_hook(ifa->hello_timer);
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}
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return PS_DOWN;
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}
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void
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ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old, ea_list *attrs)
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{
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struct proto_ospf *po=(struct proto_ospf *)p;
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OSPF_TRACE(D_EVENTS, "Got route %I/%d %s", p->name, n->n.prefix,
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n->n.pxlen, new ? "up" : "down");
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if(new) /* Got some new route */
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{
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originate_ext_lsa(n, new, po, attrs);
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}
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else
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{
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u32 rtid=po->proto.cf->global->router_id;
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struct ospf_area *oa;
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struct top_hash_entry *en;
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u32 pr=ipa_to_u32(n->n.prefix);
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struct ospf_lsa_ext *ext;
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int i;
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/* Flush old external LSA */
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WALK_LIST(oa, po->area_list)
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{
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for(i=0;i<MAXNETS;i++,pr++)
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{
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if(en=ospf_hash_find(oa->gr, pr, rtid, LSA_T_EXT))
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{
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ext=en->lsa_body;
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if(ipa_compare(ext->netmask, ipa_mkmask(n->n.pxlen))==0)
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{
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net_flush_lsa(en,po,oa);
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break;
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}
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}
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}
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}
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}
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}
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static void
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ospf_get_status(struct proto *p, byte *buf)
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{
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struct proto_ospf *po=(struct proto_ospf *)p;
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if (p->proto_state == PS_DOWN) buf[0] = 0;
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else
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{
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struct ospf_iface *ifa;
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struct ospf_neighbor *n;
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int adj=0;
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WALK_LIST(ifa,po->iface_list)
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WALK_LIST(n,ifa->neigh_list)
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if(n->state==NEIGHBOR_FULL) adj=1;
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if(adj==0) strcpy(buf, "Alone");
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else strcpy(buf, "Running");
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}
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}
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static void
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ospf_get_route_info(rte *rte, byte *buf, ea_list *attrs)
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{
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char met=' ';
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char type=' ';
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if(rte->attrs->source==RTS_OSPF_EXT)
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{
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met='1';
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type='E';
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}
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if(rte->u.ospf.metric2!=LSINFINITY) met='2';
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if(rte->attrs->source==RTS_OSPF_IA) type='A';
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if(rte->attrs->source==RTS_OSPF) type='I';
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buf += bsprintf(buf, " %c", type);
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if(met!=' ') buf += bsprintf(buf, "%c", met);
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buf += bsprintf(buf, " (%d/%d)", rte->pref,
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(rte->u.ospf.metric2==LSINFINITY) ? rte->u.ospf.metric1 :
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rte->u.ospf.metric2);
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if(rte->attrs->source==RTS_OSPF_EXT && rte->u.ospf.tag)
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{
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buf += bsprintf(buf, " [%x]", rte->u.ospf.tag);
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}
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}
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static int
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ospf_get_attr(eattr *a, byte *buf)
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{
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switch (a->id)
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{
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case EA_OSPF_METRIC1: bsprintf(buf, "metric1"); return GA_NAME;
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case EA_OSPF_METRIC2: bsprintf(buf, "metric2"); return GA_NAME;
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case EA_OSPF_TAG: bsprintf(buf, "tag: %08x", a->u.data); return GA_FULL;
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default: return GA_UNKNOWN;
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}
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}
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static int
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ospf_reconfigure(struct proto *p, struct proto_config *c)
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{
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return 0; /* Alway down :-( */
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}
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void
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ospf_sh_neigh(struct proto *p, char *iff)
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{
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struct ospf_iface *ifa=NULL,*f;
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struct ospf_neighbor *n;
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struct proto_ospf *po=(struct proto_ospf *)p;
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if(p->proto_state != PS_UP)
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{
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cli_msg(-1013,"%s: is not up", p->name);
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cli_msg(0,"");
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return;
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}
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if(iff!=NULL)
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{
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WALK_LIST(f, po->iface_list)
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{
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if(strcmp(iff,f->iface->name)==0)
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{
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ifa=f;
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break;
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}
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}
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if(ifa==NULL)
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{
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cli_msg(0,"");
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return;
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}
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cli_msg(-1013,"%s:", p->name);
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cli_msg(-1013,"%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s","Router ID","Pri",
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" State", "DTime", "Router IP", "Interface");
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WALK_LIST(n, ifa->neigh_list) ospf_sh_neigh_info(n);
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cli_msg(0,"");
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return;
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}
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cli_msg(-1013,"%s:", p->name);
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cli_msg(-1013,"%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s","Router ID","Pri",
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" State", "DTime", "Router IP", "Interface");
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WALK_LIST(ifa,po->iface_list)
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WALK_LIST(n, ifa->neigh_list)
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ospf_sh_neigh_info(n);
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cli_msg(0,"");
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}
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void
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ospf_sh(struct proto *p)
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{
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struct ospf_area *oa;
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struct proto_ospf *po=(struct proto_ospf *)p;
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struct ospf_iface *ifa;
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struct ospf_neighbor *n;
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int ifano;
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int nno;
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int adjno;
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if(p->proto_state != PS_UP)
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{
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cli_msg(-1014,"%s: is not up", p->name);
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cli_msg(0,"");
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return;
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}
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cli_msg(-1014,"%s:", p->name);
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cli_msg(-1014,"Number of areas: %u", po->areano);
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WALK_LIST(oa,po->area_list)
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{
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cli_msg(-1014,"\tArea: %I (%u) %s", oa->areaid, oa->areaid,
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oa->areaid==0 ? "[BACKBONE]" : "");
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ifano=0;
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nno=0;
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adjno=0;
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WALK_LIST(ifa, po->iface_list)
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{
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if(oa==ifa->oa) ifano++;
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WALK_LIST(n, ifa->neigh_list)
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{
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nno++;
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if(n->state==NEIGHBOR_FULL) adjno++;
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}
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}
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cli_msg(-1014,"\t\tStub:\t%s", oa->stub ? "Yes" : "No");
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cli_msg(-1014,"\t\tRT scheduler tick:\t%u", oa->tick);
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cli_msg(-1014,"\t\tNumber of interfaces:\t%u", ifano);
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cli_msg(-1014,"\t\tNumber of LSAs in DB:\t%u", oa->gr->hash_entries);
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cli_msg(-1014,"\t\tNumber of neighbors:\t%u", nno);
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cli_msg(-1014,"\t\tNumber of adjacent neighbors:\t%u", adjno);
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}
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cli_msg(0,"");
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}
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void
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ospf_sh_iface(struct proto *p, char *iff)
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{
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struct ospf_area *oa;
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struct proto_ospf *po=(struct proto_ospf *)p;
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struct ospf_iface *ifa=NULL,*f;
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struct ospf_neighbor *n;
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int ifano;
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int nno;
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int adjno;
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if(p->proto_state != PS_UP)
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{
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cli_msg(-1015,"%s: is not up", p->name);
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cli_msg(0,"");
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return;
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}
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if(iff!=NULL)
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{
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WALK_LIST(f, po->iface_list)
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{
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if(strcmp(iff,f->iface->name)==0)
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{
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ifa=f;
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break;
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}
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}
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if(ifa==NULL)
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{
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cli_msg(0,"");
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return;
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}
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cli_msg(-1015,"%s:", p->name);
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ospf_iface_info(ifa);
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cli_msg(0,"");
|
|
return;
|
|
}
|
|
cli_msg(-1015,"%s:", p->name);
|
|
WALK_LIST(ifa, po->iface_list) ospf_iface_info(ifa);
|
|
cli_msg(0,"");
|
|
}
|
|
|
|
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,
|
|
reconfigure: ospf_reconfigure
|
|
};
|
|
|