/* * BIRD -- OSPF * * (c) 2000 Ondrej Filip <feela@network.cz> * * Can be freely distributed and used under the terms of the GNU GPL. */ #include "ospf.h" void ospf_lsreq_tx(struct ospf_neighbor *n) { snode *sn; struct top_hash_entry *en; struct ospf_lsreq_packet *pk; struct ospf_packet *op; struct ospf_lsreq_header *lsh; u16 length; int i,j; pk=(struct ospf_lsreq_packet *)n->ifa->ip_sk->tbuf; op=(struct ospf_packet *)n->ifa->ip_sk->tbuf; fill_ospf_pkt_hdr(n->ifa, pk, LSREQ); sn=SHEAD(n->lsrql); if(EMPTY_SLIST(n->lsrql)) { if(n->state==NEIGHBOR_LOADING) ospf_neigh_sm(n, INM_LOADDONE); return; } i=j=(n->ifa->iface->mtu-SIPH-sizeof(struct ospf_lsreq_packet))/ sizeof(struct ospf_lsreq_header); lsh=(struct ospf_lsreq_header *)(pk+1); for(;i>0;i--) { en=(struct top_hash_entry *)sn; lsh->padd1=0; lsh->padd2=0; lsh->type=en->lsa.type; lsh->rt=htonl(en->lsa.rt); lsh->id=htonl(en->lsa.id); DBG("Requesting %uth LSA: Type: %u, Id: %u, RT: %u\n",i, en->lsa.type, en->lsa.id, en->lsa.rt); lsh++; if(sn==STAIL(n->lsrql)) break; sn=sn->next; } if(i!=0) i--; length=sizeof(struct ospf_lsreq_packet)+(j-i)*sizeof(struct ospf_lsreq_header); op->length=htons(length); ospf_pkt_finalize(n->ifa, op); sk_send_to(n->ifa->ip_sk,length, n->ip, OSPF_PROTO); DBG("Lsreq send to: %u\n", n->rid); } void lsrr_timer_hook(timer *timer) { struct ospf_iface *ifa; struct proto *p; struct ospf_neighbor *n; n=(struct ospf_neighbor *)timer->data; ifa=n->ifa; p=(struct proto *)(ifa->proto); debug("%s: LSRR timer fired on interface %s for neigh: %u.\n", p->name, ifa->iface->name, n->rid); ospf_lsreq_tx(n); } void ospf_lsreq_rx(struct ospf_lsreq_packet *ps, struct proto *p, struct ospf_iface *ifa, u16 size) { u32 nrid, myrid; struct ospf_neighbor *n; struct ospf_lsreq_header *lsh; struct l_lsr_head *llsh; list uplist; slab *upslab; int length; u8 i; nrid=ntohl(ps->ospf_packet.routerid); myrid=p->cf->global->router_id; if((n=find_neigh(ifa, nrid))==NULL) { debug("%s: Received lsreq from unknown neigbor! (%u)\n", p->name, nrid); return ; } if(n->state<NEIGHBOR_EXCHANGE) debug("%s: Ignoring it.\n", p->name); length=htons(ps->ospf_packet.length); lsh=(void *)(ps+1); init_list(&uplist); upslab=sl_new(p->pool,sizeof(struct l_lsr_head)); for(i=0;i<(length-sizeof(struct ospf_lsreq_packet))/ sizeof(struct ospf_lsreq_header);i++); { DBG("Processing LSA: ID=%u, Type=%u, Router=%u\n", ntohl(lsh->id), lsh->type, ntohl(lsh->rt)); llsh=sl_alloc(upslab); llsh->lsh.id=ntohl(lsh->id); llsh->lsh.rt=ntohl(lsh->rt); llsh->lsh.type=lsh->type; add_tail(&uplist, NODE llsh); if(ospf_hash_find(n->ifa->oa->gr, llsh->lsh.id, llsh->lsh.rt, llsh->lsh.type)==NULL) { ospf_neigh_sm(n,INM_BADLSREQ); rfree(upslab); return; } } ospf_lsupd_tx_list(n, &uplist); rfree(upslab); }