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-rw-r--r--proto/ospf/ospf.h5
-rw-r--r--proto/ospf/rt.c133
-rw-r--r--proto/ospf/rt.h7
-rw-r--r--proto/ospf/topology.h3
4 files changed, 39 insertions, 109 deletions
diff --git a/proto/ospf/ospf.h b/proto/ospf/ospf.h
index 939bae7..39f59bd 100644
--- a/proto/ospf/ospf.h
+++ b/proto/ospf/ospf.h
@@ -336,11 +336,6 @@ struct proto_ospf {
int areano; /* Number of area I belong to */
};
-struct spf_n {
- node n;
- struct top_hash_entry *en;
-};
-
static int ospf_start(struct proto *p);
static void ospf_dump(struct proto *p);
static struct proto *ospf_init(struct proto_config *c);
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index cc996b8..2d923ea 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -8,23 +8,19 @@
#include "ospf.h"
-/* FIXME next hop calculation
- * FIXME sync with BIRD's routing table
- */
-
void
ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
{
struct top_hash_entry *en, *nx;
- slab *sl, *sll;
- struct spf_n *cn;
u32 i,*rts;
struct ospf_lsa_rt *rt;
struct ospf_lsa_rt_link *rtl;
+ rta a0,*a;
/*
* First of all, mark all vertices as they are not in SPF
* Maybe I can join this work with Aging of structure
+ * FIXME look at it
*/
WALK_SLIST(SNODE en, oa->lsal)
@@ -36,14 +32,9 @@ ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
init_list(&oa->cand); /* Empty list of candidates */
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;
oa->rt->dist=0;
oa->rt->color=CANDIDATE;
- add_head(&oa->cand,NODE cn);
+ add_head(&oa->cand, &en->cn);
while(!EMPTY_LIST(oa->cand))
{
@@ -52,9 +43,8 @@ ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
struct ospf_lsa_net *net;
n=HEAD(oa->cand);
- act=((struct spf_n *)n)->en;
+ act=SKIP_BACK(struct top_hash_entry, cn, n);
rem_node(n);
- sl_free(sl,n); /* Good idea? */
act->color=INSPF;
switch(act->lsa.type)
@@ -82,7 +72,7 @@ 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,act->dist+rtl->metric,sl,sll);
+ add_cand(&oa->cand,tmp,act,act->dist+rtl->metric);
}
break;
case LSA_T_NET:
@@ -92,7 +82,7 @@ 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,act->dist,sl,sll);
+ add_cand(&oa->cand,tmp,act,act->dist);
}
break;
}
@@ -131,110 +121,57 @@ ospf_rt_spfa(struct ospf_area *oa, struct proto *p)
void
add_cand(list *l, struct top_hash_entry *en, struct top_hash_entry *par,
- u16 dist, slab *s, slab *sll)
+ u16 dist)
{
- struct spf_n *tmp;
- node *prev;
+ node *prev,*n;
int flag=0;
+ struct top_hash_entry *act;
if(en==NULL) return;
if(en->lsa.age==LSA_MAXAGE) return;
/* FIXME Does it have link back? Test it! */
if(en->color==INSPF) return;
- if(dist>en->dist) return;
+ if(dist>=en->dist) return;
+ /*
+ * FIXME The line above is not a bug, but we don't support
+ * multiple next hops. I'll start as soon as nest will
+ */
- if(dist==en->dist)
+ en->nh=calc_next_hop(par);
+
+ if(en->color==CANDIDATE) /* We found shorter path */
{
- en->nh=multi_next_hop(par,en,s,sll);
+ rem_node(&en->cn);
}
- else
- {
- en->nh=calc_next_hop(par,s,sll);
-
- if(en->color==CANDIDATE)
- {
- WALK_LIST(tmp,*l)
- {
- if(tmp->en==en)
- {
- rem_node(NODE tmp);
- flag=1;
- break;
- }
- }
- }
-
- if(flag!=1)
- {
- tmp=sl_alloc(s);
- tmp->en=en;
- }
- en->dist=dist;
- en->color=CANDIDATE;
+ en->dist=dist;
+ en->color=CANDIDATE;
- prev=NULL;
+ prev=NULL;
- WALK_LIST(tmp,*l)
+ WALK_LIST(n,*l)
+ {
+ act=SKIP_BACK(struct top_hash_entry, cn, n);
+ if((act->dist>dist)||
+ ((act->dist==dist)&&(act->lsa.type==LSA_T_NET)))
{
- if((tmp->en->dist>dist)||
- ((tmp->en->dist==dist)&&(tmp->en->lsa.type==LSA_T_NET)))
- {
- if(prev==NULL) add_head(l,NODE tmp);
- else insert_node(NODE tmp,prev);
- break;
- }
+ if(prev==NULL) add_head(l,&en->cn);
+ else insert_node(&en->cn,prev);
+ break;
}
- /* FIXME Some VLINK staff should be here */
+ prev=n;
}
+ /* FIXME Some VLINK staff should be here */
+
}
-list *
-calc_next_hop(struct top_hash_entry *par, slab *sl, slab *sll)
+struct top_hash_entry *
+calc_next_hop(struct top_hash_entry *par)
{
- 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;
+ return par;
}
-
-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 fd827b0..eb8c43c 100644
--- a/proto/ospf/rt.h
+++ b/proto/ospf/rt.h
@@ -12,10 +12,7 @@
void ospf_rt_spfa(struct ospf_area *oa, struct proto *p);
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);
-
+ u16 dist);
+struct top_hash_entry *calc_next_hop(struct top_hash_entry *par);
#endif /* _BIRD_OSPF_RT_H_ */
diff --git a/proto/ospf/topology.h b/proto/ospf/topology.h
index e825de7..1c3e9ea 100644
--- a/proto/ospf/topology.h
+++ b/proto/ospf/topology.h
@@ -11,11 +11,12 @@
struct top_hash_entry { /* Index for fast mapping (type,rtrid,LSid)->vertex */
snode n;
+ node cn;
struct top_hash_entry *next; /* Next in hash chain */
struct ospf_lsa_header lsa;
void *lsa_body;
bird_clock_t inst_t; /* Time of installation into DB */
- list *nh; /* List of next hops */
+ struct top_hash_entry *nh; /* Next hop */
u16 dist; /* Distance from the root */
u8 color;
#define OUTSPF 0
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 04:07:02 +0100