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OSPF: Improved handling of tmpattrs
Keep track of whether OSPF tmpattrs are actually defined for given route (using flags in rte->pflags). That makes them behave more like real eattrs so a protocol can define just a subset of them or they can be undefined by filters. Do not set ospf_metric2 for other than type 2 external OSPF routes and do not set ospf_tag for non-external OSPF routes. That also fixes a bug where internal/inter-area route propagated from one OSPF instance to another is initiated with infinity ospf_metric2. Thanks to Yaroslav Dronskii for the bugreport.
This commit is contained in:
Ondrej Zajicek (work)
parent
b9deced219
commit
9aa77fcceb
@ -308,6 +308,8 @@ void rte_free(rte *);
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rte *rte_do_cow(rte *);
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static inline rte * rte_cow(rte *r) { return (r->flags & REF_COW) ? rte_do_cow(r) : r; }
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rte *rte_cow_rta(rte *r, linpool *lp);
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void rte_make_tmp_attr(struct rte *r, struct ea_list *e, uint id, uint type, u32 val);
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uint rte_store_tmp_attr(struct rte *r, uint id);
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void rt_dump(rtable *);
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void rt_dump_all(void);
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int rt_feed_channel(struct channel *c);
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@ -481,6 +483,7 @@ typedef struct eattr {
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#define EA_CODE(proto,id) (((proto) << 8) | (id))
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#define EA_ID(ea) ((ea) & 0xff)
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#define EA_PROTO(ea) ((ea) >> 8)
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#define EA_ID_FLAG(ea) (1 << EA_ID(ea))
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#define EA_CUSTOM(id) ((id) | EA_CUSTOM_BIT)
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#define EA_IS_CUSTOM(ea) ((ea) & EA_CUSTOM_BIT)
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#define EA_CUSTOM_ID(ea) ((ea) & ~EA_CUSTOM_BIT)
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@ -325,6 +325,39 @@ rte_cow_rta(rte *r, linpool *lp)
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return r;
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}
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/* Note that rte_make_tmp_attr() requires free eattr in ea_list */
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void
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rte_make_tmp_attr(rte *r, ea_list *e, uint id, uint type, u32 val)
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{
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if (r->pflags & EA_ID_FLAG(id))
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{
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eattr *a = &e->attrs[e->count++];
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a->id = id;
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a->type = type | EAF_TEMP;
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a->flags = 0;
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a->u.data = val;
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}
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}
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/* Note that rte has to be writable */
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uint
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rte_store_tmp_attr(rte *r, uint id)
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{
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eattr *a;
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if (a = ea_find(r->attrs->eattrs, id))
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{
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r->pflags |= EA_ID_FLAG(id);
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return a->u.data;
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}
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else
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{
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r->pflags &= ~EA_ID_FLAG(id);
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return 0;
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}
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}
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static int /* Actually better or at least as good as */
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rte_better(rte *new, rte *old)
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{
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@ -364,35 +364,6 @@ ospf_rte_same(struct rte *new, struct rte *old)
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new->u.ospf.router_id == old->u.ospf.router_id;
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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,
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u32 tag, u32 rid)
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{
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struct ea_list *l =
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lp_alloc(pool, sizeof(struct ea_list) + 4 * sizeof(eattr));
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l->next = next;
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l->flags = EALF_SORTED;
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l->count = 4;
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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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l->attrs[3].id = EA_OSPF_ROUTER_ID;
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l->attrs[3].flags = 0;
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l->attrs[3].type = EAF_TYPE_ROUTER_ID | EAF_TEMP;
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l->attrs[3].u.data = rid;
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return l;
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}
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void
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ospf_schedule_rtcalc(struct ospf_proto *p)
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@ -470,17 +441,27 @@ ospf_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
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static 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,
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rt->u.ospf.tag, rt->u.ospf.router_id);
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struct ea_list *e = lp_alloc(pool, sizeof(struct ea_list) + 4 * sizeof(eattr));
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e->next = NULL;
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e->flags = EALF_SORTED;
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e->count = 0;
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rte_make_tmp_attr(rt, e, EA_OSPF_METRIC1, EAF_TYPE_INT, rt->u.ospf.metric1);
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rte_make_tmp_attr(rt, e, EA_OSPF_METRIC2, EAF_TYPE_INT, rt->u.ospf.metric2);
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rte_make_tmp_attr(rt, e, EA_OSPF_TAG, EAF_TYPE_INT, rt->u.ospf.tag);
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rte_make_tmp_attr(rt, e, EA_OSPF_ROUTER_ID, EAF_TYPE_ROUTER_ID, rt->u.ospf.router_id);
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return e;
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}
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static void
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ospf_store_tmp_attrs(struct rte *rt)
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{
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rt->u.ospf.metric1 = ea_get_int(rt->attrs->eattrs, EA_OSPF_METRIC1, LSINFINITY);
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rt->u.ospf.metric2 = ea_get_int(rt->attrs->eattrs, EA_OSPF_METRIC2, 10000);
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rt->u.ospf.tag = ea_get_int(rt->attrs->eattrs, EA_OSPF_TAG, 0);
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rt->u.ospf.router_id = ea_get_int(rt->attrs->eattrs, EA_OSPF_ROUTER_ID, 0);
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rt->u.ospf.metric1 = rte_store_tmp_attr(rt, EA_OSPF_METRIC1);
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rt->u.ospf.metric2 = rte_store_tmp_attr(rt, EA_OSPF_METRIC2);
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rt->u.ospf.tag = rte_store_tmp_attr(rt, EA_OSPF_TAG);
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rt->u.ospf.router_id = rte_store_tmp_attr(rt, EA_OSPF_ROUTER_ID);
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}
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/**
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@ -402,8 +402,6 @@ add_network(struct ospf_area *oa, net_addr *net, int metric, struct top_hash_ent
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.type = RTS_OSPF,
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.options = 0,
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.metric1 = metric,
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.metric2 = LSINFINITY,
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.tag = 0,
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.rid = en->lsa.rt,
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.oa = oa,
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.nhs = en->nhs
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@ -459,8 +457,6 @@ spfa_process_rt(struct ospf_proto *p, struct ospf_area *oa, struct top_hash_entr
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.type = RTS_OSPF,
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.options = rt->options,
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.metric1 = act->dist,
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.metric2 = LSINFINITY,
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.tag = 0,
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.rid = act->lsa.rt,
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.oa = oa,
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.nhs = act->nhs
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@ -823,8 +819,6 @@ ospf_rt_sum(struct ospf_area *oa)
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.type = RTS_OSPF_IA,
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.options = options,
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.metric1 = abr->n.metric1 + metric,
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.metric2 = LSINFINITY,
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.tag = 0,
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.rid = en->lsa.rt, /* ABR ID */
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.oa = oa,
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.nhs = abr->n.nhs
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@ -1563,7 +1557,7 @@ ospf_ext_spf(struct ospf_proto *p)
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{
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nfa.type = RTS_OSPF_EXT1;
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nfa.metric1 = br_metric + rt.metric;
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nfa.metric2 = LSINFINITY;
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nfa.metric2 = 0;
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}
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/* Mark the LSA as reachable */
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@ -2033,7 +2027,14 @@ again1:
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e->u.ospf.metric2 = nf->old_metric2 = nf->n.metric2;
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e->u.ospf.tag = nf->old_tag = nf->n.tag;
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e->u.ospf.router_id = nf->old_rid = nf->n.rid;
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e->pflags = 0;
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e->pflags = EA_ID_FLAG(EA_OSPF_METRIC1) | EA_ID_FLAG(EA_OSPF_ROUTER_ID);
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if (nf->n.type == RTS_OSPF_EXT2)
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e->pflags |= EA_ID_FLAG(EA_OSPF_METRIC2);
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/* Perhaps onfly if tag is non-zero? */
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if ((nf->n.type == RTS_OSPF_EXT1) || (nf->n.type == RTS_OSPF_EXT2))
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e->pflags |= EA_ID_FLAG(EA_OSPF_TAG);
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DBG("Mod rte type %d - %N via %I on iface %s, met %d\n",
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a0.source, nf->fn.addr, a0.gw, a0.iface ? a0.iface->name : "(none)", nf->n.metric1);
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