diff options
Diffstat (limited to 'proto/ospf/lsupd.c')
| -rw-r--r-- | proto/ospf/lsupd.c | 163 |
1 files changed, 139 insertions, 24 deletions
diff --git a/proto/ospf/lsupd.c b/proto/ospf/lsupd.c index 1b4ecc6..f2554b2 100644 --- a/proto/ospf/lsupd.c +++ b/proto/ospf/lsupd.c @@ -14,6 +14,116 @@ ospf_lsupd_tx(struct ospf_neighbor *n) /* FIXME Go on! */ } +void +flood_lsa(struct ospf_neighbor *n, struct ospf_lsa_header *hn, + struct ospf_lsa_header *hh, struct proto_ospf *po, struct ospf_iface *iff) +{ + struct ospf_iface *ifa; + struct ospf_neighbor *nn; + struct top_hash_entry *en; + int ret; + + /* pg 148 */ + WALK_LIST(NODE ifa,po->iface_list) + { + if(hh->type==LSA_T_EXT) + { + if(ifa->type==OSPF_IT_VLINK) continue; + if(ifa->oa->stub) continue; + } + else + { + if(iff->oa->areaid==BACKBONE) + { + if((ifa->type!=OSPF_IT_VLINK)&&(ifa->oa!=iff->oa)) continue; + } + else + { + if(ifa->oa!=iff->oa) continue; + } + } + ret=0; + WALK_LIST(NODE nn, ifa->neigh_list) + { + if(nn->state<NEIGHBOR_EXCHANGE) continue; + if(nn->state<NEIGHBOR_FULL) + { + + if((en=ospf_hash_find_header(nn->lsrqh,hh))!=NULL) + { + switch(lsa_comp(hh,&en->lsa)) + { + case CMP_OLDER: + continue; + break; + case CMP_SAME: + s_rem_node(SNODE en); + DBG("Removing from lsreq list for neigh %u\n", nn->rid); + ospf_hash_delete(nn->lsrqh,en); + if(EMPTY_SLIST(nn->lsrql)) ospf_neigh_sm(nn, INM_LOADDONE); + continue; + break; + case CMP_NEWER: + s_rem_node(SNODE en); + DBG("Removing from lsreq list for neigh %u\n", nn->rid); + ospf_hash_delete(nn->lsrqh,en); + if(EMPTY_SLIST(nn->lsrql)) ospf_neigh_sm(nn, INM_LOADDONE); + break; + default: bug("Bug in lsa_comp?\n"); + } + } + } + if(nn==n) continue; + en=ospf_hash_get_header(nn->lsrth, hh); + s_add_tail(&nn->lsrtl, SNODE en); + ret=1; + } + if(ret==0) continue; + if(ifa==iff) + { + if((n->rid==iff->drid)||n->rid==iff->bdrid) continue; + if(iff->state=OSPF_IS_BACKUP) continue; + } + /* FIXME directly flood */ + { + sock *sk; + ip_addr to; + u16 len; + struct ospf_lsupd_packet *pk; + struct ospf_packet *op; + + if(ifa->type==OSPF_IT_NBMA) sk=iff->ip_sk; + else sk=iff->hello_sk; /* FIXME is this tru for PTP? */ + + pk=(struct ospf_lsupd_packet *)sk->tbuf; + op=(struct ospf_packet *)sk->tbuf; + + fill_ospf_pkt_hdr(ifa, pk, LSUPD); + pk->lsano=htonl(1); + memcpy(pk+1,hn,ntohs(hn->length)); + len=sizeof(struct ospf_lsupd_packet)+ntohs(hn->length); + op->length=htons(len); + ospf_pkt_finalize(ifa, op); + + if(ifa->type==OSPF_IT_NBMA) + { + struct ospf_neighbor *nnn; + WALK_LIST(NODE nnn,ifa->neigh_list) + { + if(nnn->state>NEIGHBOR_EXSTART) + sk_send_to(sk,len, nnn->ip, OSPF_PROTO); + } + } + else + { + if((ifa->state==OSPF_IS_BACKUP)||(ifa->state==OSPF_IS_DR)) + sk_send_to(sk,len, AllSPFRouters, OSPF_PROTO); + else sk_send_to(sk,len, AllDRouters, OSPF_PROTO); + } + } + } +} + void /* I send all I received in LSREQ */ ospf_lsupd_tx_list(struct ospf_neighbor *n, list *l) { @@ -116,16 +226,19 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p, { struct ospf_lsa_header lsatmp; struct top_hash_entry *lsadb; + /* pg 143 (1) */ if(lsa->checksum!=lsasum_check(lsa,NULL,po)) { log("Received bad lsa checksum from %u\n",n->rid); continue; } + /* pg 143 (2) */ if((lsa->type<LSA_T_RT)||(lsa->type>LSA_T_EXT)) { log("Unknown LSA type from %u\n",n->rid); continue; } + /* pg 143 (3) */ if((lsa->type==LSA_T_EXT)&&oa->stub) { log("Received External LSA in stub area from %u\n",n->rid); @@ -136,21 +249,7 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p, lsatmp.id, lsatmp.rt); lsadb=ospf_hash_find_header(oa->gr, &lsatmp); - /* Remove it from link state request list */ - WALK_LIST(NODE ifa,po->iface_list) - WALK_LIST(NODE ntmp,ifa->neigh_list) - { - struct top_hash_entry *en; - if(ntmp->state>NEIGHBOR_EXSTART) - if((en=ospf_hash_find_header(ntmp->lsrqh,&lsatmp))!=NULL) - { - s_rem_node(SNODE en); - DBG("Removing from lsreq list for neigh %u\n", ntmp->rid); - ospf_hash_delete(ntmp->lsrqh,en); - if(EMPTY_SLIST(ntmp->lsrql)) ospf_neigh_sm(ntmp, INM_LOADDONE); - } - } - + /* pg 143 (4) */ if((lsatmp.age==LSA_MAXAGE)&&(lsadb==NULL)) { struct ospf_neighbor *n=NULL; @@ -169,20 +268,23 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p, continue; } } + /* pg 144 (5) */ if((lsadb==NULL)||(lsa_comp(&lsatmp,&lsadb->lsa)==CMP_NEWER)) { - struct ospf_neighbor *n=NULL; - struct ospf_iface *ifa=NULL; + struct ospf_iface *ift=NULL; void *body; - /* FIXME self originated? */ + /* pg 144 (5a) */ if(lsadb && ((lsadb->inst_t-now)<MINLSARRIVAL)) continue; + flood_lsa(n,lsa,&lsatmp,po,ifa); + /* Remove old from all ret lists */ + /* pg 144 (5c) */ if(lsadb) - WALK_LIST(NODE ifa,po->iface_list) - WALK_LIST(NODE ntmp,ifa->neigh_list) + WALK_LIST(NODE ift,po->iface_list) + WALK_LIST(NODE ntmp,ift->neigh_list) { struct top_hash_entry *en; if(ntmp->state>NEIGHBOR_EXSTART) @@ -193,17 +295,22 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p, } } - /* Install new */ + /* pg 144 (5d) */ 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)); + ntohlsab(lsa+1,body,lsatmp.type, + lsatmp.length-sizeof(struct ospf_lsa_header)); lsadb=lsa_install_new(&lsatmp,body, oa); DBG("New LSA installed in DB\n"); + /* FIXME 144 (5e) ack */ + /* FIXME 145 (5f) self originated? */ + continue; } - /* FIXME pg144 (6)?? */ + /* FIXME pg145 (6)?? */ + /* pg145 (7) */ if(lsa_comp(&lsatmp,&lsadb->lsa)==CMP_SAME) { struct top_hash_entry *en; @@ -213,9 +320,17 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p, continue; } + /* pg145 (8) */ if((lsadb->lsa.age==LSA_MAXAGE)&&(lsadb->lsa.sn==LSA_MAXSEQNO)) continue; - /* FIXME lsa_send(n,lsa) */ + { + list l; + struct l_lsr_head llsh; + init_list(&l); + memcpy(&llsh.lsh,&lsadb->lsa,sizeof(struct ospf_lsa_header)); + add_tail(&l, NODE &llsh); + ospf_lsupd_tx_list(n, &l); + } } } |