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bird/proto/ospf/ospf.c

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/*
* BIRD -- OSPF
*
* (c) 1999 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "ospf.h"
static int
ospf_start(struct proto *p)
{
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_config *c=(struct ospf_config *)(p->cf);
struct ospf_area_config *ac;
struct ospf_area *oa;
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);
return PS_DOWN;
}
WALK_LIST(ac,c->area_list)
{
oa=mb_allocz(po->proto.pool, sizeof(struct ospf_area));
add_tail(&po->area_list,NODE oa);
po->areano++;
oa->stub=ac->stub;
oa->tick=ac->tick;
oa->areaid=ac->areaid;
oa->gr=ospf_top_new(po);
s_init_list(&(oa->lsal));
oa->rt=NULL;
oa->po=po;
oa->disp_timer=tm_new(po->proto.pool);
oa->disp_timer->data=oa;
oa->disp_timer->randomize=0;
oa->disp_timer->hook=area_disp;
oa->disp_timer->recurrent=oa->tick;
oa->lage=now;
tm_start(oa->disp_timer,oa->tick);
oa->calcrt=0;
oa->origrt=0;
fib_init(&oa->infib,po->proto.pool,sizeof(struct infib),16,init_infib);
}
return PS_UP;
}
static void
ospf_dump(struct proto *p)
{
char areastr[20];
struct ospf_iface *ifa;
struct ospf_neighbor *n;
struct ospf_config *c = (void *) p->cf;
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_area *oa;
OSPF_TRACE(D_EVENTS, "Area number: %d", po->areano);
WALK_LIST(ifa, po->iface_list)
{
OSPF_TRACE(D_EVENTS, "Interface: %s", ifa->iface->name);
OSPF_TRACE(D_EVENTS, "state: %u", ifa->state);
OSPF_TRACE(D_EVENTS, "DR: %I", ifa->drid);
OSPF_TRACE(D_EVENTS, "BDR: %I", ifa->bdrid);
WALK_LIST(n, ifa->neigh_list)
{
OSPF_TRACE(D_EVENTS, " neighbor %I in state %u", n->rid, n->state);
}
}
WALK_LIST(NODE oa,po->area_list)
{
OSPF_TRACE(D_EVENTS, "LSA graph dump for area \"%I\" start:", oa->areaid);
ospf_top_dump(oa->gr,p);
OSPF_TRACE(D_EVENTS, "LSA graph dump for area \"%I\" finished", oa->areaid);
}
neigh_dump_all();
}
static struct proto *
ospf_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct proto_ospf));
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_config *oc=(struct ospf_config *)c;
struct ospf_area_config *ac;
struct ospf_iface_patt *patt;
p->import_control = ospf_import_control;
p->make_tmp_attrs = ospf_make_tmp_attrs;
p->store_tmp_attrs = ospf_store_tmp_attrs;
p->rt_notify = ospf_rt_notify;
p->if_notify = ospf_if_notify;
p->rte_better = ospf_rte_better;
p->rte_same = ospf_rte_same;
po->rfc1583=oc->rfc1583;
return p;
}
/* If new is better return 1 */
static int
ospf_rte_better(struct rte *new, struct rte *old)
{
struct proto *p = new->attrs->proto;
if(new->u.ospf.metric1=LSINFINITY) return 0;
if(((new->attrs->source==RTS_OSPF) || (new->attrs->source==RTS_OSPF_IA))
&& (old->attrs->source==RTS_OSPF_EXT)) return 1;
if(((old->attrs->source==RTS_OSPF) || (old->attrs->source==RTS_OSPF_IA))
&& (new->attrs->source==RTS_OSPF_EXT)) return 0;
if(new->u.ospf.metric2!=0)
{
if(old->u.ospf.metric2==0) return 0;
if(new->u.ospf.metric2<old->u.ospf.metric2) return 1;
return 0;
}
else
{
if(old->u.ospf.metric2!=0) return 1;
if(new->u.ospf.metric1<old->u.ospf.metric1) return 1;
return 0;
}
}
static int
ospf_rte_same(struct rte *new, struct rte *old)
{
/* new->attrs == old->attrs always */
return
new->u.ospf.metric1 == old->u.ospf.metric1 &&
new->u.ospf.metric2 == old->u.ospf.metric2 &&
new->u.ospf.tag == old->u.ospf.tag;
}
static ea_list *
ospf_build_attrs(ea_list *next, struct linpool *pool, u32 m1, u32 m2, u32 tag)
{
struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 3*sizeof(eattr));
l->next = next;
l->flags = EALF_SORTED;
l->count = 3;
l->attrs[0].id = EA_OSPF_METRIC1;
l->attrs[0].flags = 0;
l->attrs[0].type = EAF_TYPE_INT | EAF_TEMP;
l->attrs[0].u.data = m1;
l->attrs[1].id = EA_OSPF_METRIC2;
l->attrs[1].flags = 0;
l->attrs[1].type = EAF_TYPE_INT | EAF_TEMP;
l->attrs[1].u.data = m2;
l->attrs[2].id = EA_OSPF_TAG;
l->attrs[2].flags = 0;
l->attrs[2].type = EAF_TYPE_INT | EAF_TEMP;
l->attrs[2].u.data = tag;
return l;
}
void
schedule_rt_lsa(struct ospf_area *oa)
{
struct proto_ospf *po=oa->po;
struct proto *p=&po->proto;
OSPF_TRACE(D_EVENTS, "Scheduling RT lsa origination for area %I.",
oa->areaid);
oa->origrt=1;
}
void
schedule_rtcalc(struct ospf_area *oa)
{
struct proto_ospf *po=oa->po;
struct proto *p=&po->proto;
OSPF_TRACE(D_EVENTS, "Scheduling RT calculation for area %I.",
oa->areaid);
oa->calcrt=1;
}
void
area_disp(timer *timer)
{
struct ospf_area *oa=timer->data;
struct top_hash_entry *en,*nxt;
/* First of all try to age LSA DB */
ospf_age(oa);
/* Now try to originage rt_lsa */
if(oa->origrt) originate_rt_lsa(oa);
oa->origrt=0;
if(oa->calcrt) ospf_rt_spfa(oa);
oa->calcrt=0;
}
int
ospf_import_control(struct proto *p, rte **new, ea_list **attrs, struct linpool *pool)
{
rte *e=*new;
struct proto_ospf *po=(struct proto_ospf *)p;
if(p==e->attrs->proto) return -1; /* Reject our own routes */
*attrs = ospf_build_attrs(*attrs, pool, LSINFINITY, 10000, 0);
return 0; /* Leave decision to the filters */
}
struct ea_list *
ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool)
{
return ospf_build_attrs(NULL, pool, rt->u.ospf.metric1, rt->u.ospf.metric2, rt->u.ospf.tag);
}
void
ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)
{
rt->u.ospf.metric1 = ea_get_int(attrs, EA_OSPF_METRIC1, LSINFINITY);
rt->u.ospf.metric2 = ea_get_int(attrs, EA_OSPF_METRIC2, 10000);
rt->u.ospf.tag = ea_get_int(attrs, EA_OSPF_TAG, 0);
}
static int
ospf_shutdown(struct proto *p)
{
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_iface *ifa;
struct ospf_neighbor *n;
struct ospf_area *oa;
OSPF_TRACE(D_EVENTS, "Shutdown requested");
/* And send to all my neighbors 1WAY */
WALK_LIST(ifa, po->iface_list)
{
init_list(&ifa->neigh_list);
hello_timer_hook(ifa->hello_timer);
}
return PS_DOWN;
}
void
ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old, ea_list *attrs)
{
struct proto_ospf *po=(struct proto_ospf *)p;
OSPF_TRACE(D_EVENTS, "Got route %I/%d %s", p->name, n->n.prefix,
n->n.pxlen, new ? "up" : "down");
if(new) /* Got some new route */
{
originate_ext_lsa(n, new, po, attrs);
}
else
{
u32 rtid=po->proto.cf->global->router_id;
struct ospf_area *oa;
struct top_hash_entry *en;
u32 pr=ipa_to_u32(n->n.prefix);
struct ospf_lsa_ext *ext;
int i;
/* Flush old external LSA */
WALK_LIST(oa, po->area_list)
{
for(i=0;i<MAXNETS;i++,pr++)
{
if(en=ospf_hash_find(oa->gr, pr, rtid, LSA_T_EXT))
{
ext=en->lsa_body;
if(ipa_compare(ext->netmask, ipa_mkmask(n->n.pxlen))==0)
{
net_flush_lsa(en,po,oa);
break;
}
}
}
}
}
}
static void
ospf_get_status(struct proto *p, byte *buf)
{
struct proto_ospf *po=(struct proto_ospf *)p;
if (p->proto_state == PS_DOWN) buf[0] = 0;
else
{
struct ospf_iface *ifa;
struct ospf_neighbor *n;
int adj=0;
WALK_LIST(ifa,po->iface_list)
WALK_LIST(n,ifa->neigh_list)
if(n->state==NEIGHBOR_FULL) adj=1;
if(adj==0) strcpy(buf, "Alone");
else strcpy(buf, "Running");
}
}
static void
ospf_get_route_info(rte *rte, byte *buf, ea_list *attrs)
{
char met=' ';
char type=' ';
if(rte->attrs->source==RTS_OSPF_EXT)
{
met='1';
type='E';
}
if(rte->u.ospf.metric2!=LSINFINITY) met='2';
if(rte->attrs->source==RTS_OSPF_IA) type='A';
if(rte->attrs->source==RTS_OSPF) type='I';
buf += bsprintf(buf, " %c", type);
if(met!=' ') buf += bsprintf(buf, "%c", met);
buf += bsprintf(buf, " (%d/%d)", rte->pref,
(rte->u.ospf.metric2==LSINFINITY) ? rte->u.ospf.metric1 :
rte->u.ospf.metric2);
if(rte->attrs->source==RTS_OSPF_EXT && rte->u.ospf.tag)
{
buf += bsprintf(buf, " [%x]", rte->u.ospf.tag);
}
}
static int
ospf_get_attr(eattr *a, byte *buf)
{
switch (a->id)
{
case EA_OSPF_METRIC1: bsprintf(buf, "metric1"); return GA_NAME;
case EA_OSPF_METRIC2: bsprintf(buf, "metric2"); return GA_NAME;
case EA_OSPF_TAG: bsprintf(buf, "tag: %08x", a->u.data); return GA_FULL;
default: return GA_UNKNOWN;
}
}
static int
ospf_patt_compare(struct ospf_iface_patt *a, struct ospf_iface_patt *b)
{
return ((a->type==b->type)&&(a->priority==b->priority));
}
static int
ospf_reconfigure(struct proto *p, struct proto_config *c)
{
struct ospf_config *old=(struct ospf_config *)(p->cf);
struct ospf_config *new=(struct ospf_config *)c;
struct ospf_area_config *ac1,*ac2;
struct proto_ospf *po=( struct proto_ospf *)p;
struct ospf_iface_patt *ip1,*ip2;
struct ospf_iface *ifa;
struct nbma_node *nb1,*nb2,*nbnx;
struct ospf_area *oa;
int found;
po->rfc1583=new->rfc1583; /* FIXME but if differs schedule RT calc */
ac1=HEAD(old->area_list);
ac2=HEAD(new->area_list);
/* I should get it in same order */
while(((NODE (ac1))->next!=NULL) && ((NODE (ac2))->next!=NULL))
{
if(ac1->areaid!=ac2->areaid) return 0;
if(ac1->stub!=ac2->stub) return 0;
if(ac1->tick!=ac2->tick)
{
WALK_LIST(oa,po->area_list)
{
if(oa->areaid==ac2->areaid)
{
oa->tick=ac2->tick;
tm_start(oa->disp_timer,oa->tick);
OSPF_TRACE(D_EVENTS,
"Changing tick interval on area %I from %d to %d",
oa->areaid, ac1->tick, ac2->tick);
break;
}
}
}
if(!iface_patts_equal(&ac1->patt_list, &ac2->patt_list,
(void *) ospf_patt_compare))
return 0;
WALK_LIST(ifa, po->iface_list)
{
if(ip1=(struct ospf_iface_patt *)
iface_patt_match(&ac1->patt_list, ifa->iface))
{
/* Now reconfigure interface */
if(!(ip2=(struct ospf_iface_patt *)
iface_patt_match(&ac2->patt_list, ifa->iface))) return 0;
/* HELLO TIMER */
if(ip1->helloint!=ip2->helloint)
{
ifa->helloint=ip2->helloint;
ifa->hello_timer->recurrent=ifa->helloint;
tm_start(ifa->hello_timer,ifa->helloint);
OSPF_TRACE(D_EVENTS,
"Changing hello interval on interface %s from %d to %d",
ifa->iface->name,ip1->helloint,ip2->helloint);
}
/* COST */
if(ip1->cost!=ip2->cost)
{
ifa->cost=ip2->cost;
OSPF_TRACE(D_EVENTS,
"Changing cost interface %s from %d to %d",
ifa->iface->name,ip1->cost,ip2->cost);
schedule_rt_lsa(ifa->oa);
}
/* AUTHETICATION */
if(ip1->autype!=ip2->autype)
{
ifa->autype=ip2->autype;
OSPF_TRACE(D_EVENTS,
"Changing autentication type on interface %s",
ifa->iface->name);
}
if(strncmp(ip1->password,ip2->password,8)!=0)
{
memcpy(ifa->aukey,ip2->password,8);
OSPF_TRACE(D_EVENTS,
"Changing password on interface %s",
ifa->iface->name);
}
/* RXMT */
if(ip1->rxmtint!=ip2->rxmtint)
{
ifa->rxmtint=ip2->rxmtint;
OSPF_TRACE(D_EVENTS,
"Changing retransmit interval on interface %s from %d to %d",
ifa->iface->name,ip1->rxmtint,ip2->rxmtint);
}
/* WAIT */
if(ip1->waitint!=ip2->waitint)
{
ifa->waitint=ip2->waitint;
if(ifa->wait_timer->expires!=0)
tm_start(ifa->wait_timer,ifa->waitint);
OSPF_TRACE(D_EVENTS,
"Changing wait interval on interface %s from %d to %d",
ifa->iface->name,ip1->waitint,ip2->waitint);
}
/* INFTRANS */
if(ip1->inftransdelay!=ip2->inftransdelay)
{
ifa->inftransdelay=ip2->inftransdelay;
OSPF_TRACE(D_EVENTS,
"Changing transmit delay on interface %s from %d to %d",
ifa->iface->name,ip1->inftransdelay,ip2->inftransdelay);
}
/* DEAD COUNT */
if(ip1->deadc!=ip2->deadc)
{
ifa->deadc=ip2->deadc;
OSPF_TRACE(D_EVENTS,
"Changing dead count on interface %s from %d to %d",
ifa->iface->name,ip1->deadc,ip2->deadc);
}
/* NBMA LIST */
/* First remove old */
WALK_LIST_DELSAFE(nb1, nbnx, ifa->nbma_list)
{
found=0;
WALK_LIST(nb2, ip2->nbma_list)
if(ipa_compare(nb1->ip,nb2->ip)==0)
{
found=1;
break;
}
if(!found)
{
OSPF_TRACE(D_EVENTS,
"Removing NBMA neighbor %I on interface %s",
nb1->ip,ifa->iface->name);
rem_node(NODE nb1);
mb_free(nb1);
}
}
/* And then add new */
WALK_LIST(nb2, ip2->nbma_list)
{
found=0;
WALK_LIST(nb1, ifa->nbma_list)
if(ipa_compare(nb1->ip,nb2->ip)==0)
{
found=1;
break;
}
if(!found)
{
nb1=mb_alloc(p->pool,sizeof(struct nbma_node));
nb1->ip=nb2->ip;
add_tail(&ifa->nbma_list, NODE nb1);
OSPF_TRACE(D_EVENTS,
"Adding NBMA neighbor %I on interface %s",
nb1->ip,ifa->iface->name);
}
}
}
}
NODE ac1=(NODE (ac1))->next;
NODE ac2=(NODE (ac2))->next;
}
if(((NODE (ac1))->next)!=((NODE (ac2))->next))
return 0; /* One is not null */
return 1; /* Everythink OK :-) */
}
void
ospf_sh_neigh(struct proto *p, char *iff)
{
struct ospf_iface *ifa=NULL,*f;
struct ospf_neighbor *n;
struct proto_ospf *po=(struct proto_ospf *)p;
if(p->proto_state != PS_UP)
{
cli_msg(-1013,"%s: is not up", p->name);
cli_msg(0,"");
return;
}
if(iff!=NULL)
{
WALK_LIST(f, po->iface_list)
{
if(strcmp(iff,f->iface->name)==0)
{
ifa=f;
break;
}
}
if(ifa==NULL)
{
cli_msg(0,"");
return;
}
cli_msg(-1013,"%s:", p->name);
cli_msg(-1013,"%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s","Router ID","Pri",
" State", "DTime", "Router IP", "Interface");
WALK_LIST(n, ifa->neigh_list) ospf_sh_neigh_info(n);
cli_msg(0,"");
return;
}
cli_msg(-1013,"%s:", p->name);
cli_msg(-1013,"%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s","Router ID","Pri",
" State", "DTime", "Router IP", "Interface");
WALK_LIST(ifa,po->iface_list)
WALK_LIST(n, ifa->neigh_list)
ospf_sh_neigh_info(n);
cli_msg(0,"");
}
void
ospf_sh(struct proto *p)
{
struct ospf_area *oa;
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_iface *ifa;
struct ospf_neighbor *n;
int ifano;
int nno;
int adjno;
if(p->proto_state != PS_UP)
{
cli_msg(-1014,"%s: is not up", p->name);
cli_msg(0,"");
return;
}
cli_msg(-1014,"%s:", p->name);
cli_msg(-1014,"Number of areas: %u", po->areano);
WALK_LIST(oa,po->area_list)
{
cli_msg(-1014,"\tArea: %I (%u) %s", oa->areaid, oa->areaid,
oa->areaid==0 ? "[BACKBONE]" : "");
ifano=0;
nno=0;
adjno=0;
WALK_LIST(ifa, po->iface_list)
{
if(oa==ifa->oa) ifano++;
WALK_LIST(n, ifa->neigh_list)
{
nno++;
if(n->state==NEIGHBOR_FULL) adjno++;
}
}
cli_msg(-1014,"\t\tStub:\t%s", oa->stub ? "Yes" : "No");
cli_msg(-1014,"\t\tRT scheduler tick:\t%u", oa->tick);
cli_msg(-1014,"\t\tNumber of interfaces:\t%u", ifano);
cli_msg(-1014,"\t\tNumber of LSAs in DB:\t%u", oa->gr->hash_entries);
cli_msg(-1014,"\t\tNumber of neighbors:\t%u", nno);
cli_msg(-1014,"\t\tNumber of adjacent neighbors:\t%u", adjno);
}
cli_msg(0,"");
}
void
ospf_sh_iface(struct proto *p, char *iff)
{
struct ospf_area *oa;
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_iface *ifa=NULL,*f;
struct ospf_neighbor *n;
int ifano;
int nno;
int adjno;
if(p->proto_state != PS_UP)
{
cli_msg(-1015,"%s: is not up", p->name);
cli_msg(0,"");
return;
}
if(iff!=NULL)
{
WALK_LIST(f, po->iface_list)
{
if(strcmp(iff,f->iface->name)==0)
{
ifa=f;
break;
}
}
if(ifa==NULL)
{
cli_msg(0,"");
return;
}
cli_msg(-1015,"%s:", p->name);
ospf_iface_info(ifa);
cli_msg(0,"");
return;
}
cli_msg(-1015,"%s:", p->name);
WALK_LIST(ifa, po->iface_list) ospf_iface_info(ifa);
cli_msg(0,"");
}
struct protocol proto_ospf = {
name: "OSPF",
template: "ospf%d",
attr_class: EAP_OSPF,
init: ospf_init,
dump: ospf_dump,
start: ospf_start,
shutdown: ospf_shutdown,
get_route_info: ospf_get_route_info,
get_attr: ospf_get_attr,
get_status: ospf_get_status,
reconfigure: ospf_reconfigure
};
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