Commit e9ab0b42 authored by Ondřej Filip's avatar Ondřej Filip

Doc in lsalib.c + related minor changes.

parent d5e4b518
......@@ -3,3 +3,4 @@ S topology.c
S neighbor.c
S iface.c
S packet.c
S lsalib.c
/*
* BIRD -- OSPF
*
* (c) 1999-2000 Ondrej Filip <feela@network.cz>
* (c) 1999 - 2000 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
......@@ -18,6 +18,18 @@ flush_lsa(struct top_hash_entry *en, struct ospf_area *oa)
ospf_hash_delete(oa->gr,en);
}
/**
* ospf_age
* @oa: ospf area
*
* This function is periodicaly invoked from area_disp(). It computes new
* age of all LSAs and old (@age is higher than %LSA_MAXAGE) are flushed
* when ever possible. If some LSA originated by router itself is older
* than %LSREFRESHTIME new instance is originated.
*
* RFC says, that router should check checksum of every LSA to detect some
* hardware problem. BIRD does not do it to minimalize CPU utilization.
*/
void
ospf_age(struct ospf_area *oa)
{
......@@ -379,11 +391,21 @@ lsa_comp(struct ospf_lsa_header *l1, struct ospf_lsa_header *l2)
return CMP_SAME;
}
/* LSA can be temporarrily, but body must be mb_alloced. */
/**
* lsa_install_new - install new LSA into database
* @lsa: LSA header
* @body pointer to LSA body
* @oa: current ospf_area
*
* This function ensures installing new LSA into LSA database. Old instance is
* replaced. Several actions are taken to detec if new routing table
* calculation is necessary. This is described in 13.2 of RFC 2328.
*/
struct top_hash_entry *
lsa_install_new(struct ospf_lsa_header *lsa, void *body, struct ospf_area *oa,
struct proto *p)
lsa_install_new(struct ospf_lsa_header *lsa, void *body, struct ospf_area *oa)
{
/* LSA can be temporarrily, but body must be mb_alloced. */
struct proto *p=&oa->po->proto;
int change=0;
unsigned i;
struct top_hash_entry *en;
......
/*
* BIRD -- OSPF
*
* (c) 2000 Ondrej Filip <feela@network.cz>
* (c) 1999 - 2000 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*
......@@ -22,7 +22,7 @@ u16 lsasum_check(struct ospf_lsa_header *h,void *body,struct proto_ospf *po);
#define CMP_OLDER -1
int lsa_comp(struct ospf_lsa_header *l1, struct ospf_lsa_header *l2);
struct top_hash_entry *lsa_install_new(struct ospf_lsa_header *lsa, void *body,
struct ospf_area *oa, struct proto *p);
struct ospf_area *oa);
void ospf_age(struct ospf_area *oa);
void flush_lsa(struct top_hash_entry *en, struct ospf_area *oa);
......
......@@ -425,7 +425,7 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p,
body=mb_alloc(p->pool,lsatmp.length-sizeof(struct ospf_lsa_header));
ntohlsab(lsa+1,body,lsatmp.type,
lsatmp.length-sizeof(struct ospf_lsa_header));
lsadb=lsa_install_new(&lsatmp,body, oa, p);
lsadb=lsa_install_new(&lsatmp,body, oa);
DBG("New LSA installed in DB\n");
continue;
......
......@@ -205,7 +205,7 @@ originate_rt_lsa(struct ospf_area *oa)
}
body=originate_rt_lsa_body(oa, &lsa.length, po);
lsasum_calculate(&lsa,body,po);
en=lsa_install_new(&lsa, body, oa, &po->proto);
en=lsa_install_new(&lsa, body, oa);
oa->rt=en;
flood_lsa(NULL,NULL,&oa->rt->lsa,po,NULL,oa,1);
schedule_rtcalc(oa);
......@@ -297,7 +297,7 @@ originate_net_lsa(struct ospf_iface *ifa)
body=originate_net_lsa_body(ifa, &lsa.length, po);
lsasum_calculate(&lsa,body,po);
ifa->nlsa=lsa_install_new(&lsa, body, ifa->oa, &po->proto);
ifa->nlsa=lsa_install_new(&lsa, body, ifa->oa);
flood_lsa(NULL,NULL,&ifa->nlsa->lsa,po,NULL,ifa->oa,1);
}
......@@ -401,7 +401,7 @@ originate_ext_lsa(net *n, rte *e, struct proto_ospf *po, struct ea_list *attrs)
lsasum_calculate(&lsa,body,po);
WALK_LIST(oa, po->area_list)
{
en=lsa_install_new(&lsa, body, oa, &po->proto);
en=lsa_install_new(&lsa, body, oa);
flood_lsa(NULL,NULL,&en->lsa,po,NULL,oa,1);
body=originate_ext_lsa_body(n, e, po, attrs);
}
......
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