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authorOndrej Filip <feela@network.cz>2000-04-29 17:57:14 +0200
committerOndrej Filip <feela@network.cz>2000-04-29 17:57:14 +0200
commit468f2347fc0ea3e0eb6513ccd0433d0b48f2c739 (patch)
treef005ee0f216ddb3bc1bc7cc9a354856588b44e29 /proto
parent9c1a55deeeb5aa5cd2f18b109fabb50947c308ab (diff)
downloadbird-468f2347fc0ea3e0eb6513ccd0433d0b48f2c739.tar
bird-468f2347fc0ea3e0eb6513ccd0433d0b48f2c739.zip
Calculating of nexts hop(s) added.
Diffstat (limited to 'proto')
-rw-r--r--proto/ospf/rt.c66
-rw-r--r--proto/ospf/rt.h7
-rw-r--r--proto/ospf/topology.h2
3 files changed, 65 insertions, 10 deletions
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index 60bf453..cc996b8 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -16,7 +16,7 @@ void
ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
{
struct top_hash_entry *en, *nx;
- slab *sl;
+ slab *sl, *sll;
struct spf_n *cn;
u32 i,*rts;
struct ospf_lsa_rt *rt;
@@ -37,6 +37,7 @@ ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
oa->trcap=0;
sl=sl_new(p->pool,sizeof(struct spf_n));
+ sll=sl_new(p->pool,sizeof(list));
cn=sl_alloc(sl);
cn->en=oa->rt;
@@ -81,7 +82,7 @@ ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
log("Unknown link type in router lsa.\n");
break;
}
- add_cand(&oa->cand,tmp,act->dist+rtl->metric,sl);
+ add_cand(&oa->cand,tmp,act,act->dist+rtl->metric,sl,sll);
}
break;
case LSA_T_NET:
@@ -91,10 +92,11 @@ ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
sizeof(struct ospf_lsa_net))/sizeof(u32);i++)
{
tmp=ospf_hash_find(oa->gr, *rts, *rts, LSA_T_RT);
- add_cand(&oa->cand,tmp,act->dist,sl);
+ add_cand(&oa->cand,tmp,act,act->dist,sl,sll);
}
break;
}
+ /* FIXME Now modify rt for this entry */
}
/* Now calculate routes to stub networks */
@@ -128,7 +130,8 @@ ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
}
void
-add_cand(list *l, struct top_hash_entry *en, u16 dist, slab *s)
+add_cand(list *l, struct top_hash_entry *en, struct top_hash_entry *par,
+ u16 dist, slab *s, slab *sll)
{
struct spf_n *tmp;
node *prev;
@@ -143,12 +146,11 @@ add_cand(list *l, struct top_hash_entry *en, u16 dist, slab *s)
if(dist==en->dist)
{
- //Add Next hop
- //And add it to routing table (Multiple path?)
+ en->nh=multi_next_hop(par,en,s,sll);
}
else
{
- /* Clear next hop */
+ en->nh=calc_next_hop(par,s,sll);
if(en->color==CANDIDATE)
{
@@ -185,6 +187,54 @@ add_cand(list *l, struct top_hash_entry *en, u16 dist, slab *s)
}
}
/* FIXME Some VLINK staff should be here */
- /* Routing table add?*/
}
}
+
+list *
+calc_next_hop(struct top_hash_entry *par, slab *sl, slab *sll)
+{
+ struct spf_n *nh;
+ list *l;
+
+ if(par->nh==NULL)
+ {
+ if(par->lsa.type!=LSA_T_RT) return NULL;
+ l=sl_alloc(sll);
+ init_list(l);
+ nh=sl_alloc(sl);
+ nh->en=par;
+ add_head(l, NODE nh);
+ return l;
+ }
+ return par->nh;
+}
+
+list *
+multi_next_hop(struct top_hash_entry *par, struct top_hash_entry *en, slab *sl,
+ slab *sll)
+{
+ struct spf_n *n1,*n2;
+ list *l1,*l2;
+
+ l1=calc_next_hop(par,sl,sll);
+ if(l1==NULL) return en->nh;
+ if(en->nh==NULL) return l1;
+
+ l2=sl_alloc(sll);
+ init_list(l2);
+ WALK_LIST(n1, *l1)
+ {
+ n2=sl_alloc(sl);
+ memcpy(n2,n1,sizeof(struct spf_n));
+ add_tail(l2,NODE n2);
+ }
+
+ WALK_LIST(n1, *en->nh)
+ {
+ n2=sl_alloc(sl);
+ memcpy(n2,n1,sizeof(struct spf_n));
+ add_tail(l2,NODE n2);
+ }
+ return l2;
+}
+
diff --git a/proto/ospf/rt.h b/proto/ospf/rt.h
index 6eb0bcc..fd827b0 100644
--- a/proto/ospf/rt.h
+++ b/proto/ospf/rt.h
@@ -11,6 +11,11 @@
#define _BIRD_OSPF_RT_H_
void ospf_rt_spfa(struct ospf_area *oa, struct proto *p);
-void add_cand(list *l, struct top_hash_entry *en, u16 dist, slab *s);
+void add_cand(list *l, struct top_hash_entry *en, struct top_hash_entry *par,
+ u16 dist, slab *s, slab *sll);
+list *calc_next_hop(struct top_hash_entry *par, slab *sl, slab *sll);
+list *multi_next_hop(struct top_hash_entry *par, struct top_hash_entry *en,
+ slab *sl, slab *sll);
+
#endif /* _BIRD_OSPF_RT_H_ */
diff --git a/proto/ospf/topology.h b/proto/ospf/topology.h
index 032a977..e825de7 100644
--- a/proto/ospf/topology.h
+++ b/proto/ospf/topology.h
@@ -15,7 +15,7 @@ struct top_hash_entry { /* Index for fast mapping (type,rtrid,LSid)->vertex */
struct ospf_lsa_header lsa;
void *lsa_body;
bird_clock_t inst_t; /* Time of installation into DB */
- list nh; /* List of next hops */
+ list *nh; /* List of next hops */
u16 dist; /* Distance from the root */
u8 color;
#define OUTSPF 0