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Small cleanup, indentation and preparation for multiple areas routing table calculation.

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This commit is contained in:
Ondrej Filip 2004-06-06 16:00:09 +00:00
parent d631698ec8
commit b8f17cf192
8 changed files with 81 additions and 52 deletions
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4
proto/ospf/config.Y
View file

@ -38,6 +38,7 @@ ospf_proto_start: proto_start OSPF {
this_proto->preference = DEF_PREF_OSPF;
init_list(&OSPF_CFG->area_list);
OSPF_CFG->rfc1583 = DEFAULT_RFC1583;
OSPF_CFG->tick = DEFAULT_OSPFTICK;
}
;
@ -49,6 +50,7 @@ ospf_proto:
ospf_proto_item:
proto_item
| RFC1583COMPAT bool ';' { OSPF_CFG->rfc1583 = $2; }
| TICK expr { OSPF_CFG->tick = $2 ; if($2<=0) cf_error("Tick must be greater than zero"); }
| ospf_area '}'
;
@ -56,7 +58,7 @@ ospf_area_start: AREA idval '{' {
this_area = cfg_allocz(sizeof(struct ospf_area_config));
add_tail(&OSPF_CFG->area_list, NODE this_area);
this_area->areaid = $2;
this_area->tick = DEFAULT_DISPTICK;
this_area->tick = DEFAULT_AREATICK;
this_area->stub = 0;
init_list(&this_area->patt_list);
init_list(&this_area->net_list);

7
proto/ospf/lsalib.c
View file

@ -49,7 +49,7 @@ ospf_age(struct ospf_area *oa)
WALK_SLIST_DELSAFE(en, nxt, oa->lsal)
{
if (oa->calcrt)
if (po->calcrt)
{
en->color = OUTSPF;
en->dist = LSINFINITY;
@ -82,7 +82,7 @@ ospf_age(struct ospf_area *oa)
if (flush)
{
flush_lsa(en, oa);
schedule_rtcalc(oa);
schedule_rtcalc(po);
}
else
en->lsa.age = LSA_MAXAGE;
@ -438,6 +438,7 @@ lsa_install_new(struct ospf_lsa_header *lsa, void *body, struct ospf_area *oa)
int change = 0;
unsigned i;
struct top_hash_entry *en;
struct proto_ospf *po = oa->po;
if ((en = ospf_hash_find_header(oa->gr, lsa)) == NULL)
{
@ -477,7 +478,7 @@ lsa_install_new(struct ospf_lsa_header *lsa, void *body, struct ospf_area *oa)
if (change)
{
schedule_rtcalc(oa);
schedule_rtcalc(po);
}
return en;

2
proto/ospf/lsupd.c
View file

@ -485,7 +485,7 @@ ospf_lsupd_receive(struct ospf_lsupd_packet *ps,
&& lsadb && can_flush_lsa(oa))
{
flush_lsa(lsadb, oa);
schedule_rtcalc(oa);
schedule_rtcalc(po);
continue;
} /* FIXME lsack? */

55
proto/ospf/ospf.c
View file

@ -72,6 +72,9 @@
static int ospf_rte_better(struct rte *new, struct rte *old);
static int ospf_rte_same(struct rte *new, struct rte *old);
static void area_disp(timer *timer);
static void ospf_disp(timer *timer);
static int
ospf_start(struct proto *p)
@ -82,13 +85,24 @@ ospf_start(struct proto *p)
struct ospf_area *oa;
struct area_net *anet, *antmp;
po->rfc1583 = c->rfc1583;
po->ebit = 0;
po->tick = c->tick;
po->disp_timer = tm_new(po->proto.pool);
po->disp_timer->data = po;
po->disp_timer->randomize = 0;
po->disp_timer->hook = ospf_disp;
po->disp_timer->recurrent = po->tick;
tm_start(po->disp_timer, 1);
fib_init(&po->efib, p->pool, sizeof(struct extfib), 16, init_efib);
init_list(&(po->iface_list));
init_list(&(po->area_list));
po->areano = 0;
if (EMPTY_LIST(c->area_list))
{
log("%s: Cannot start, no OSPF areas configured", p->name);
log(L_ERR "Cannot start, no OSPF areas configured!");
return PS_DOWN;
}
@ -109,9 +123,7 @@ ospf_start(struct proto *p)
oa->disp_timer->randomize = 0;
oa->disp_timer->hook = area_disp;
oa->disp_timer->recurrent = oa->tick;
tm_start(oa->disp_timer, 1);
oa->calcrt = 0;
oa->origrt = 0;
tm_start(oa->disp_timer, 2);
init_list(&oa->net_list);
WALK_LIST(anet, ac->net_list)
{
@ -174,8 +186,6 @@ ospf_init(struct proto_config *c)
p->rte_better = ospf_rte_better;
p->rte_same = ospf_rte_same;
po->rfc1583 = oc->rfc1583;
po->ebit = 0;
return p;
}
@ -265,8 +275,7 @@ schedule_net_lsa(struct ospf_iface *ifa)
void
schedule_rt_lsa(struct ospf_area *oa)
{
struct proto_ospf *po = oa->po;
struct proto *p = &po->proto;
struct proto *p = &oa->po->proto;
OSPF_TRACE(D_EVENTS, "Scheduling RT lsa origination for area %I.",
oa->areaid);
@ -274,16 +283,15 @@ schedule_rt_lsa(struct ospf_area *oa)
}
void
schedule_rtcalc(struct ospf_area *oa)
schedule_rtcalc(struct proto_ospf *po)
{
struct proto_ospf *po = oa->po;
struct proto *p = &po->proto;
if (oa->calcrt)
if (po->calcrt)
return;
OSPF_TRACE(D_EVENTS, "Scheduling RT calculation for area %I.", oa->areaid);
oa->calcrt = 1;
OSPF_TRACE(D_EVENTS, "Scheduling RT calculation.");
po->calcrt = 1;
}
/**
@ -293,8 +301,6 @@ schedule_rtcalc(struct ospf_area *oa)
*
* It invokes aging and when @ospf_area->origrt is set to 1, start
* function for origination of router LSA and network LSAs.
* It also starts routing
* table calculation when @ospf_area->calcrt is set.
*/
void
area_disp(timer * timer)
@ -316,13 +322,21 @@ area_disp(timer * timer)
/* Age LSA DB */
ospf_age(oa);
}
void
ospf_disp(timer * timer)
{
struct proto_ospf *po = timer->data;
/* Calculate routing table */
if (oa->calcrt)
ospf_rt_spfa(oa);
oa->calcrt = 0;
if (po->calcrt)
ospf_rt_spf (po);
po->calcrt = 0;
}
/**
* ospf_import_control - accept or reject new route from nest's routing table
* @p: current instance of protocol
@ -533,10 +547,7 @@ ospf_reconfigure(struct proto *p, struct proto_config *c)
int found;
po->rfc1583 = new->rfc1583;
WALK_LIST(oa, po->area_list) /* Routing table must be recalculated */
{
schedule_rtcalc(oa);
}
schedule_rtcalc(po);
ac1 = HEAD(old->area_list);
ac2 = HEAD(new->area_list);

14
proto/ospf/ospf.h
View file

@ -52,14 +52,15 @@
#define MINLSARRIVAL 1
#define LSINFINITY 0xffff /* RFC says 0xffffff ??? */
#define DEFAULT_DISPTICK 4
#define DEFAULT_OSPFTICK 5
#define DEFAULT_AREATICK 4
#define DEFAULT_RFC1583 1 /* compatibility with rfc1583 */
struct ospf_config
{
struct proto_config c;
unsigned tick;
int rfc1583;
list area_list;
};
@ -422,7 +423,6 @@ struct ospf_area
node n;
u32 areaid;
timer *disp_timer; /* Area's dispatcher hear beat */
int calcrt; /* Routing table calculation scheduled? */
int origrt; /* Rt lsa origination scheduled? */
struct top_graph *gr; /* LSA graph */
slist lsal; /* List of all LSA's */
@ -439,6 +439,9 @@ struct ospf_area
struct proto_ospf
{
struct proto proto;
timer *disp_timer; /* OSPF proto dispatcher */
unsigned tick;
int calcrt; /* Routing table calculation scheduled? */
list iface_list; /* Interfaces we really use */
list area_list;
int areano; /* Number of area I belong to */
@ -470,15 +473,14 @@ struct ospf_iface_patt
list nbma_list;
};
int ospf_import_control(struct proto *p, rte ** new, ea_list ** attrs,
int ospf_import_control(struct proto *p, rte **new, ea_list **attrs,
struct linpool *pool);
struct ea_list *ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool);
void ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs);
void ospf_rt_notify(struct proto *p, net * n, rte * new, rte * old,
void ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old,
ea_list * attrs);
void area_disp(timer * timer);
void schedule_rt_lsa(struct ospf_area *oa);
void schedule_rtcalc(struct ospf_area *oa);
void schedule_rtcalc(struct proto_ospf *po);
void schedule_net_lsa(struct ospf_iface *ifa);
void ospf_sh_neigh(struct proto *p, char *iff);
void ospf_sh(struct proto *p);

36
proto/ospf/rt.c
View file

@ -1,12 +1,18 @@
/*
* BIRD -- OSPF
*
* (c) 2000 Ondrej Filip <feela@network.cz>
* (c) 2000--2004 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "ospf.h"
static void add_cand(list * l, struct top_hash_entry *en,
struct top_hash_entry *par, u16 dist,
struct ospf_area *oa);
static void calc_next_hop(struct top_hash_entry *en,
struct top_hash_entry *par, struct ospf_area *oa);
static void ospf_ext_spfa(struct proto_ospf *po);
void
init_infib(struct fib_node *fn)
@ -34,14 +40,14 @@ init_efib(struct fib_node *fn)
}
/**
* ospf_rt_spfa - calculate internal routes
* @oa: OSPF area
* ospf_rt_spf - calculate internal routes
* @po: OSPF protocol
*
* Calculation of internal paths in an area is described in 16.1 of RFC 2328.
* It's based on Dijkstra's shortest path tree algorithms.
* RFC recommends to add ASBR routers into routing table. I don't do this
* and latter parts of routing table calculation look directly into LSA
* Database. This function is invoked from area_disp().
* Database. This function is invoked from ospf_disp().
*/
void
ospf_rt_spfa(struct ospf_area *oa)
@ -270,6 +276,18 @@ skip:
ospf_ext_spfa(po);
}
void
ospf_rt_spf(struct proto_ospf *po)
{
struct ospf_area *oa;
WALK_LIST(oa, po->area_list)
{
ospf_rt_spfa(oa);
}
}
/**
* ospf_ext_spfa - calculate external paths
* @po: protocol
@ -278,7 +296,7 @@ skip:
* path is invoked. This process is described in 16.6 of RFC 2328.
* Inter- and Intra-area paths are always prefered over externals.
*/
void
static void
ospf_ext_spfa(struct proto_ospf *po) /* FIXME looking into inter-area */
{
struct top_hash_entry *en, *etmp, *absr;
@ -552,7 +570,7 @@ noch:
}
/* Add LSA into list of candidates in Dijkstra's algorithm */
void
static void
add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
u16 dist, struct ospf_area *oa)
{
@ -625,7 +643,7 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
/* FIXME Some VLINK stuff should be here */
}
void
static void
calc_next_hop(struct top_hash_entry *en, struct top_hash_entry *par,
struct ospf_area *oa)
{
@ -649,8 +667,8 @@ calc_next_hop(struct top_hash_entry *en, struct top_hash_entry *par,
if (en->lsa.rt == myrid)
{
WALK_LIST(ifa, po->iface_list)
if (ipa_compare(ifa->iface->addr->ip, ipa_from_u32(en->lsa.id)) ==
0)
if (ipa_compare
(ifa->iface->addr->ip, ipa_from_u32(en->lsa.id)) == 0)
{
en->nhi = ifa->iface;
return;

9
proto/ospf/rt.h
View file

@ -1,7 +1,7 @@
/*
* BIRD -- OSPF
*
* (c) 2000 Ondrej Filip <feela@network.cz>
* (c) 2000--2004 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*
@ -33,12 +33,7 @@ struct extfib
u32 oldtag;
};
void ospf_rt_spfa(struct ospf_area *oa);
void ospf_ext_spfa(struct proto_ospf *po);
void add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
u16 dist, struct ospf_area *oa);
void calc_next_hop(struct top_hash_entry *par, struct top_hash_entry *en,
struct ospf_area *oa);
void ospf_rt_spf(struct proto_ospf *po);
void init_infib(struct fib_node *fn);
void init_efib(struct fib_node *fn);

4
proto/ospf/topology.c
View file

@ -202,7 +202,7 @@ originate_rt_lsa(struct ospf_area *oa)
en = lsa_install_new(&lsa, body, oa);
oa->rt = en;
ospf_lsupd_flood(NULL, NULL, &oa->rt->lsa, NULL, oa, 1);
schedule_rtcalc(oa);
schedule_rtcalc(po);
oa->origrt = 0;
}
@ -275,7 +275,7 @@ originate_net_lsa(struct ospf_iface *ifa)
mb_free(ifa->nlsa->lsa_body);
ifa->nlsa->lsa_body = NULL;
ospf_hash_delete(ifa->oa->gr, ifa->nlsa);
schedule_rtcalc(ifa->oa);
schedule_rtcalc(po);
ifa->nlsa = NULL;
return;
}