mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 09:41:54 +00:00
Huge changes. Neighbor and interface state machines rewritten.
It should be cleaner now, I'm preparing for file splitting. Maybe I added some minor bugs. :-(
This commit is contained in:
Ondrej Filip
parent
f942a589ef
commit
96f1b8ba10
@ -255,16 +255,195 @@ electdr(list nl)
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}
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void
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backupseen(struct ospf_iface *ifa)
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install_inactim(struct ospf_neighbor *n)
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{
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struct proto *p;
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struct ospf_neighbor *neigh,*ndr,*nbdr,me;
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u32 myid;
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struct ospf_iface *ifa;
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ifa=n->ifa;
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p=(struct proto *)(ifa->proto);
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tm_stop(ifa->wait_timer);
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DBG("%s: Stoping wait timer\n",p->name);
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if(n->inactim==NULL)
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{
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n->inactim=tm_new(p->pool);
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n->inactim->data=n;
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n->inactim->randomize=0;
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n->inactim->hook=neighbor_timer_hook;
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n->inactim->recurrent=0;
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DBG("%s: Installing inactivity timer.\n", p->name);
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}
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}
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void
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restart_inactim(struct ospf_neighbor *n)
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{
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tm_start(n->inactim,n->ifa->deadc*n->ifa->helloint);
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}
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void
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restart_hellotim(struct ospf_iface *ifa)
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{
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tm_start(ifa->hello_timer,ifa->helloint);
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}
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void
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restart_waittim(struct ospf_iface *ifa)
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{
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tm_start(ifa->wait_timer,ifa->waitint);
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}
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int
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can_do_adj(struct ospf_neighbor *n)
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{
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struct ospf_iface *ifa;
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struct proto *p;
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int i;
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ifa=n->ifa;
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p=(struct proto *)(ifa->proto);
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i=0;
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switch(ifa->type)
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{
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case OSPF_IT_PTP:
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case OSPF_IT_VLINK:
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i=1;
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break;
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case OSPF_IT_BCAST:
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case OSPF_IT_NBMA:
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switch(ifa->state)
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{
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case OSPF_IS_DOWN:
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die("%s: Iface %s in down state?", p->name, ifa->iface->name);
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break;
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case OSPF_IS_WAITING:
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DBG("%s: Neighbor? on iface %s\n",p->name, ifa->iface->name);
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break;
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case OSPF_IS_DROTHER:
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if(((n->rid==ifa->drid) || (n->rid==ifa->bdrid))
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&& (n->state==NEIGHBOR_2WAY)) i=1;
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break;
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case OSPF_IS_PTP:
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case OSPF_IS_BACKUP:
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case OSPF_IS_DR:
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if(n->state==NEIGHBOR_2WAY) i=1;
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break;
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default:
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die("%s: Iface %s in unknown state?",p->name, ifa->iface->name);
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break;
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}
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break;
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default:
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die("%s: Iface %s is unknown type?",p->name, ifa->iface->name);
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break;
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}
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DBG("%s: Iface %s can_do_adj=%d\n",p->name, ifa->iface->name,i);
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return i;
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}
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void
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ospf_neigh_sm(struct ospf_neighbor *n, int event)
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/* Interface state machine */
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{
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struct proto *p;
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p=(struct proto *)(n->ifa->proto);
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switch(event)
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{
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case INM_START:
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neigh_chstate(n,NEIGHBOR_ATTEMPT);
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/* FIXME No NBMA now */
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break;
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case INM_HELLOREC:
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switch(n->state)
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{
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case NEIGHBOR_ATTEMPT:
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case NEIGHBOR_DOWN:
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neigh_chstate(n,NEIGHBOR_INIT);
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default:
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restart_inactim(n);
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break;
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}
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break;
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case INM_2WAYREC:
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if(n->state==NEIGHBOR_INIT)
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{
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/* Can In build adjacency? */
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neigh_chstate(n,NEIGHBOR_2WAY);
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if(can_do_adj(n))
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{
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neigh_chstate(n,NEIGHBOR_EXSTART);
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tryadj(n,p);
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}
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}
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break;
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case INM_NEGDONE:
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if(n->state==NEIGHBOR_EXSTART)
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{
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neigh_chstate(n,NEIGHBOR_EXCHANGE);
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/* FIXME Go on... */
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}
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break;
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case INM_EXDONE:
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break;
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case INM_LOADDONE:
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break;
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case INM_ADJOK:
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switch(n->state)
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{
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case NEIGHBOR_2WAY:
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/* Can In build adjacency? */
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if(can_do_adj(n))
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{
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neigh_chstate(n,NEIGHBOR_EXSTART);
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tryadj(n,p);
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}
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break;
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default:
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if(n->state>=NEIGHBOR_EXSTART)
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if(!can_do_adj(n))
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{
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neigh_chstate(n,NEIGHBOR_2WAY);
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/* FIXME Stop timers, kill database... */
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}
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break;
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}
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break;
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case INM_SEQMIS:
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case INM_BADLSREQ:
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if(n->state>=NEIGHBOR_EXCHANGE)
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{
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neigh_chstate(n,NEIGHBOR_EXSTART);
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/* Go on....*/
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}
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break;
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case INM_KILLNBR:
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case INM_LLDOWN:
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case INM_INACTTIM:
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neigh_chstate(n,NEIGHBOR_DOWN);
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break;
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case INM_1WAYREC:
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if(n->state>=NEIGHBOR_2WAY)
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{
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neigh_chstate(n,NEIGHBOR_DOWN);
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}
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break;
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default:
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die("%s: INM - Unknown event?",p->name);
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break;
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}
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}
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void
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bdr_election(struct ospf_iface *ifa, struct proto *p)
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{
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struct ospf_neighbor *neigh,*ndr,*nbdr,me;
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u32 myid, ndrid, nbdrid;
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int doadj;
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p=(struct proto *)(ifa->proto);
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DBG("%s: (B)DR election.\n",p->name);
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@ -297,11 +476,18 @@ backupseen(struct ospf_iface *ifa)
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nbdr=electbdr(ifa->neigh_list);
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ndr=electdr(ifa->neigh_list);
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}
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if(ndr==NULL) ifa->drid=0;
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else ifa->drid=ndr->rid;
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if(nbdr==NULL) ifa->bdrid=0;
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else ifa->bdrid=me.bdr=nbdr->rid;
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if(ndr==NULL) ifa->drid=0;
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if(ndr==NULL) ndrid=0;
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else ndrid=ndr->rid;
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if(nbdr==NULL) nbdrid=0;
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else nbdrid=nbdr->rid;
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doadj=0;
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if((ifa->drid!=ndrid) || (ifa->bdrid!=nbdrid)) doadj=1;
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ifa->drid=ndrid;
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ifa->bdrid=nbdrid;
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DBG("%s: DR=%u, BDR=%u\n",p->name, ifa->drid, ifa->bdrid);
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@ -313,6 +499,85 @@ backupseen(struct ospf_iface *ifa)
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}
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rem_node(NODE &me);
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if(doadj)
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{
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WALK_LIST (neigh, ifa->neigh_list)
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{
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ospf_neigh_sm(neigh, INM_ADJOK);
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}
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}
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}
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void
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downint(struct ospf_iface *ifa)
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{
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/* FIXME: Delete all neighbors! */
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}
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void
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ospf_int_sm(struct ospf_iface *ifa, int event)
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{
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struct proto *p;
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p=(struct proto *)(ifa->proto);
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DBG("%s: SM on iface %s. Event is %d.\n",
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p->name, ifa->iface->name, event);
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switch(event)
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{
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case ISM_UP:
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if(ifa->state==OSPF_IS_DOWN)
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{
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restart_hellotim(ifa);
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if((ifa->type==OSPF_IT_PTP) || (ifa->type==OSPF_IT_VLINK))
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{
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iface_chstate(ifa, OSPF_IS_PTP);
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}
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else
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{
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if(ifa->priority==0)
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{
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iface_chstate(ifa, OSPF_IS_DROTHER);
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}
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else
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{
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iface_chstate(ifa, OSPF_IS_WAITING);
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restart_waittim(ifa);
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}
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}
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}
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break;
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case ISM_BACKS:
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case ISM_WAITF:
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if(ifa->state==OSPF_IS_WAITING)
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{
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bdr_election(ifa ,p);
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}
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break;
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case ISM_NEICH:
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if((ifa->state==OSPF_IS_DROTHER) || (ifa->state==OSPF_IS_DR) ||
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(ifa->state==OSPF_IS_BACKUP))
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{
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bdr_election(ifa ,p);
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}
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case ISM_DOWN:
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iface_chstate(ifa, OSPF_IS_DOWN);
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downint(ifa);
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break;
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case ISM_LOOP: /* Useless? */
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iface_chstate(ifa, OSPF_IS_LOOP);
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downint(ifa);
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break;
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case ISM_UNLOOP:
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iface_chstate(ifa, OSPF_IS_DOWN);
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break;
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default:
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die("%s: ISM - Unknown event?",p->name);
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break;
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}
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}
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void
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@ -364,12 +629,6 @@ ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
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log("%s: New neighbor found: %u.", p->name,nrid);
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n=mb_alloc(p->pool, sizeof(struct ospf_neighbor));
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add_tail(&ifa->neigh_list, NODE n);
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n->inactim=tm_new(p->pool);
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n->inactim->data=n;
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n->inactim->randomize=0;
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n->inactim->hook=neighbor_timer_hook;
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n->inactim->recurrent=0;
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DBG("%s: Installing inactivity timer.\n", p->name);
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n->rid=nrid;
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n->dr=ntohl(ps->dr);
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n->bdr=ntohl(ps->bdr);
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@ -377,98 +636,70 @@ ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
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n->options=ps->options;
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n->ifa=ifa;
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n->adj=0;
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neigh_chstate(n,NEIGHBOR_INIT);
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neigh_chstate(n,NEIGHBOR_DOWN);
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install_inactim(n);
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}
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tm_start(n->inactim,ifa->deadc*ifa->helloint);
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ospf_neigh_sm(n, INM_HELLOREC);
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twoway=0;
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pnrid=(u32 *)((struct ospf_hello_packet *)(ps+1));
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twoway=0;
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for(i=0;i<size-(sizeof(struct ospf_hello_packet));i++)
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{
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if(ntohl(*(pnrid+i))==p->cf->global->router_id)
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{
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twoway=1;
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DBG("%s: Twoway received. %u\n", p->name, nrid);
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ospf_neigh_sm(n, INM_2WAYREC);
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twoway=1;
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break;
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}
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}
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if(twoway)
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{
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if(n->state<NEIGHBOR_2WAY) neigh_chstate(n,NEIGHBOR_2WAY);
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}
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else
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{
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if(n->state>=NEIGHBOR_2WAY)
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{
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/* FIXME Delete all learnt */
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neigh_chstate(n,NEIGHBOR_INIT);
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}
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}
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if(!twoway) ospf_neigh_sm(n, INM_1WAYREC);
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/* Check priority change */
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if(n->priority!=(n->priority=ps->priority))
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{
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/* FIXME NeighborChange */;
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ospf_int_sm(ifa, ISM_NEICH);
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}
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/* Check neighbor's designed router idea */
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if((n->rid!=ntohl(ps->dr)) && (ntohl(ps->bdr)==0) &&
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(ifa->state==OSPF_IS_WAITING) && (n->state>=NEIGHBOR_2WAY))
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(n->state>=NEIGHBOR_2WAY))
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{
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backupseen(ifa);
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ospf_int_sm(ifa, ISM_BACKS);
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DBG("BACKS");
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}
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if((n->rid==ntohl(ps->dr)) && (n->dr!=ntohl(ps->dr)))
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{
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/* FIXME NeighborChange */;
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ospf_int_sm(ifa, ISM_NEICH);
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}
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if((n->rid==n->dr) && (n->dr!=ntohl(ps->dr)))
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{
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/* FIXME NeighborChange */;
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ospf_int_sm(ifa, ISM_NEICH);
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}
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n->dr=ntohl(ps->dr); /* And update it */
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/* Check neighbor's backup designed router idea */
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if((n->rid==ntohl(ps->bdr)) && (ifa->state==OSPF_IS_WAITING)
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&& (n->state>=NEIGHBOR_2WAY))
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if((n->rid==ntohl(ps->bdr)) && (n->state>=NEIGHBOR_2WAY))
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{
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backupseen(ifa);
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ospf_int_sm(ifa, ISM_BACKS);
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DBG("BACKS");
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}
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if((n->rid==ntohl(ps->bdr)) && (n->bdr!=ntohl(ps->bdr)))
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{
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/* FIXME NeighborChange */;
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ospf_int_sm(ifa, ISM_NEICH);
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}
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if((n->rid==n->bdr) && (n->bdr!=ntohl(ps->bdr)))
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{
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/* FIXME NeighborChange */;
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ospf_int_sm(ifa, ISM_NEICH);
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}
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n->bdr=ntohl(ps->bdr); /* And update it */
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switch(ifa->state)
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{
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case OSPF_IS_DOWN:
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die("%s: Iface %s in down state?", p->name, ifa->iface->name);
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break;
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case OSPF_IS_WAITING:
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DBG("%s: Neighbor? on iface %s\n",p->name, ifa->iface->name);
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break;
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case OSPF_IS_DROTHER:
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if(((n->rid==ifa->drid) || (n->rid==ifa->bdrid))
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&& (n->state==NEIGHBOR_2WAY)) tryadj(n,p);
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break;
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case OSPF_IS_PTP:
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case OSPF_IS_BACKUP:
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case OSPF_IS_DR:
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if(n->state==NEIGHBOR_2WAY) tryadj(n,p);
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break;
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default:
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die("%s: Iface %s in unknown state?",p->name, ifa->iface->name);
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break;
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}
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ospf_neigh_sm(n, INM_HELLOREC);
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}
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int
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ospf_rx_hook(sock *sk, int size)
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{
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@ -697,8 +928,8 @@ ospf_iface_clasify(struct iface *ifa)
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if((ifa->flags & (IF_MULTIACCESS|IF_MULTICAST))==
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(IF_MULTIACCESS|IF_MULTICAST))
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{
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DBG(" OSPF: Clasifying BROADCAST.\n");
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return OSPF_IT_BROADCAST;
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DBG(" OSPF: Clasifying BCAST.\n");
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return OSPF_IT_BCAST;
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}
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if((ifa->flags & (IF_MULTIACCESS|IF_MULTICAST))==
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IF_MULTIACCESS)
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@ -799,12 +1030,11 @@ wait_timer_hook(timer *timer)
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p=(struct proto *)(ifa->proto);
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debug("%s: Wait timer fired on interface %s.\n",
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p->name, ifa->iface->name);
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if(ifa->state=OSPF_IS_WAITING) backupseen(ifa);
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else die("%s: Wait timer fired I'm not in WAITING state?", p->name);
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ospf_int_sm(ifa, ISM_WAITF);
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}
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void
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ospf_add_timers(struct ospf_iface *ifa, pool *pool, u16 wait)
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ospf_add_timers(struct ospf_iface *ifa, pool *pool)
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{
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struct proto *p;
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@ -816,7 +1046,7 @@ ospf_add_timers(struct ospf_iface *ifa, pool *pool, u16 wait)
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if(ifa->helloint==0) ifa->helloint=HELLOINT_D;
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ifa->hello_timer->hook=hello_timer_hook;
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||||
ifa->hello_timer->recurrent=ifa->helloint;
|
||||
tm_start(ifa->hello_timer,ifa->helloint);
|
||||
DBG("%s: Installing hello timer. (%u)\n", p->name, ifa->helloint);
|
||||
|
||||
ifa->rxmt_timer=tm_new(pool);
|
||||
ifa->rxmt_timer->data=ifa;
|
||||
@ -824,21 +1054,15 @@ ospf_add_timers(struct ospf_iface *ifa, pool *pool, u16 wait)
|
||||
if(ifa->rxmtint==0) ifa->rxmtint=RXMTINT_D;
|
||||
ifa->rxmt_timer->hook=rxmt_timer_hook;
|
||||
ifa->rxmt_timer->recurrent=ifa->rxmtint;
|
||||
DBG("%s: Installing rxmt timer. (%u)\n", p->name, ifa->rxmtint);
|
||||
|
||||
DBG("%s: Installing hello timer. (%u)\n", p->name, ifa->helloint);
|
||||
if((ifa->type!=OSPF_IT_PTP))
|
||||
{
|
||||
/* Install wait timer on NOT-PtP interfaces */
|
||||
ifa->wait_timer=tm_new(pool);
|
||||
ifa->wait_timer->data=ifa;
|
||||
ifa->wait_timer->randomize=0;
|
||||
ifa->wait_timer->hook=wait_timer_hook;
|
||||
ifa->wait_timer->recurrent=0;
|
||||
ifa->state=OSPF_IS_WAITING;
|
||||
tm_start(ifa->wait_timer,(wait!=0 ? wait : WAIT_DMH*ifa->helloint));
|
||||
DBG("%s: Installing wait timer. (%u)\n", p->name, (wait!=0 ? wait : WAIT_DMH*ifa->helloint));
|
||||
}
|
||||
else ifa->state=OSPF_IS_PTP;
|
||||
ifa->wait_timer=tm_new(pool);
|
||||
ifa->wait_timer->data=ifa;
|
||||
ifa->wait_timer->randomize=0;
|
||||
ifa->wait_timer->hook=wait_timer_hook;
|
||||
ifa->wait_timer->recurrent=0;
|
||||
if(ifa->waitint==0) ifa->waitint= WAIT_DMH*ifa->helloint;
|
||||
DBG("%s: Installing wait timer. (%u)\n", p->name, ifa->waitint);
|
||||
}
|
||||
|
||||
void
|
||||
@ -917,11 +1141,12 @@ ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface)
|
||||
|
||||
init_list(&(ifa->neigh_list));
|
||||
}
|
||||
/* FIXME: NBMA? */
|
||||
/* FIXME: This should read config */
|
||||
ifa->helloint=0;
|
||||
ospf_add_timers(ifa,p->pool,0);
|
||||
ifa->waitint=0;
|
||||
ospf_add_timers(ifa,p->pool);
|
||||
add_tail(&((struct proto_ospf *)p)->iface_list, NODE ifa);
|
||||
ospf_int_sm(ifa, ISM_UP);
|
||||
}
|
||||
|
||||
if(flags & IF_CHANGE_DOWN)
|
||||
@ -929,7 +1154,7 @@ ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface)
|
||||
if((ifa=find_iface((struct proto_ospf *)p, iface))!=NULL)
|
||||
{
|
||||
debug(" OSPF: killing interface %s.\n", iface->name);
|
||||
/* FIXME: This should delete ifaces */
|
||||
ospf_int_sm(ifa, ISM_DOWN);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -44,6 +44,7 @@ struct ospf_iface {
|
||||
interface. LSAs contained in the update */
|
||||
u8 priority; /* A router priority for DR election */
|
||||
u16 helloint; /* number of seconds between hello sending */
|
||||
u16 waitint; /* number of sec before changing state from wait */
|
||||
u32 deadc; /* after "deadint" missing hellos is router dead */
|
||||
u16 autype;
|
||||
u8 aukey[8];
|
||||
@ -53,16 +54,18 @@ struct ospf_iface {
|
||||
ip_addr bdrip; /* Backup DR */
|
||||
u32 bdrid;
|
||||
u8 type; /* OSPF view of type */
|
||||
#define OSPF_IT_BROADCAST 0
|
||||
#define OSPF_IT_BCAST 0
|
||||
#define OSPF_IT_NBMA 1
|
||||
#define OSPF_IT_PTP 2
|
||||
#define OSPF_IT_VLINK 3
|
||||
u8 state; /* Interface state machine */
|
||||
#define OSPF_IS_DOWN 0 /* Should never happen */
|
||||
#define OSPF_IS_WAITING 1 /* Waiting for Wait timer */
|
||||
#define OSPF_IS_PTP 2 /* PTP operational */
|
||||
#define OSPF_IS_DROTHER 3 /* I'm on BCAST or NBMA and I'm not DR */
|
||||
#define OSPF_IS_BACKUP 4 /* I'm BDR */
|
||||
#define OSPF_IS_DR 5 /* I'm DR */
|
||||
#define OSPF_IS_DOWN 0 /* Not working */
|
||||
#define OSPF_IS_LOOP 1 /* Should never happen */
|
||||
#define OSPF_IS_WAITING 2 /* Waiting for Wait timer */
|
||||
#define OSPF_IS_PTP 3 /* PTP operational */
|
||||
#define OSPF_IS_DROTHER 4 /* I'm on BCAST or NBMA and I'm not DR */
|
||||
#define OSPF_IS_BACKUP 5 /* I'm BDR */
|
||||
#define OSPF_IS_DR 6 /* I'm DR */
|
||||
timer *wait_timer; /* WAIT timer */
|
||||
timer *hello_timer; /* HELLOINT timer */
|
||||
timer *rxmt_timer; /* RXMT timer */
|
||||
@ -73,8 +76,8 @@ struct ospf_iface {
|
||||
#define PRIORITY_D 1
|
||||
#define HELLOINT_D 10
|
||||
#define DEADC_D 4
|
||||
#define WAIT_DMH 2 /* Value of Wait timer - not found it in RFC
|
||||
* - using 2*HELLO
|
||||
#define WAIT_DMH 3 /* Value of Wait timer - not found it in RFC
|
||||
* - using 3*HELLO
|
||||
*/
|
||||
};
|
||||
|
||||
@ -161,4 +164,28 @@ struct ospf_neighbor
|
||||
u8 adj; /* built adjacency? */
|
||||
};
|
||||
|
||||
/* Definitions for interface state machine */
|
||||
#define ISM_UP 0 /* Interface Up */
|
||||
#define ISM_WAITF 1 /* Wait timer fired */
|
||||
#define ISM_BACKS 2 /* Backup seen */
|
||||
#define ISM_NEICH 3 /* Neighbor change */
|
||||
#define ISM_LOOP 4 /* Loop indicated */
|
||||
#define ISM_UNLOOP 5 /* Unloop indicated */
|
||||
#define ISM_DOWN 6 /* Interface down */
|
||||
|
||||
/* Definitions for neighbor state machine */
|
||||
#define INM_HELLOREC 0 /* Hello Received */
|
||||
#define INM_START 1 /* Neighbor start - for NBMA */
|
||||
#define INM_2WAYREC 2 /* 2-Way received */
|
||||
#define INM_NEGDONE 3 /* Negotiation done */
|
||||
#define INM_EXDONE 4 /* Exchange done */
|
||||
#define INM_BADLSREQ 5 /* Bad LS Request */
|
||||
#define INM_LOADDONE 6 /* Load done */
|
||||
#define INM_ADJOK 7 /* AdjOK? */
|
||||
#define INM_SEQMIS 8 /* Sequence number mismatch */
|
||||
#define INM_1WAYREC 9 /* 1-Way */
|
||||
#define INM_KILLNBR 10 /* Kill Neigbor */
|
||||
#define INM_INACTTIM 11 /* Inactivity timer */
|
||||
#define INM_LLDOWN 12 /* Line down */
|
||||
|
||||
#endif /* _BIRD_OSPF_H_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user