119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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* BIRD -- OSPF
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*
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* (c) 2000 Ondrej Filip <feela@network.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#include "ospf.h"
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void
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ospf_lsreq_tx(struct ospf_neighbor *n)
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{
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snode *sn;
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struct top_hash_entry *en;
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struct ospf_lsreq_packet *pk;
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struct ospf_packet *op;
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struct ospf_lsreq_header *lsh;
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u16 length;
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int i,j;
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struct proto *p=&n->ifa->proto->proto;
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pk=(struct ospf_lsreq_packet *)n->ifa->ip_sk->tbuf;
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op=(struct ospf_packet *)n->ifa->ip_sk->tbuf;
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fill_ospf_pkt_hdr(n->ifa, pk, LSREQ_P);
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sn=SHEAD(n->lsrql);
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if(EMPTY_SLIST(n->lsrql))
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{
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if(n->state==NEIGHBOR_LOADING) ospf_neigh_sm(n, INM_LOADDONE);
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return;
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}
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i=j=(n->ifa->iface->mtu-SIPH-sizeof(struct ospf_lsreq_packet))/
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sizeof(struct ospf_lsreq_header);
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lsh=(struct ospf_lsreq_header *)(pk+1);
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for(;i>0;i--)
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{
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en=(struct top_hash_entry *)sn;
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lsh->padd1=0; lsh->padd2=0;
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lsh->type=en->lsa.type;
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lsh->rt=htonl(en->lsa.rt);
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lsh->id=htonl(en->lsa.id);
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DBG("Requesting %uth LSA: Type: %u, Id: %I, RT: %I\n",i, en->lsa.type,
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en->lsa.id, en->lsa.rt);
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lsh++;
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if(sn==STAIL(n->lsrql)) break;
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sn=sn->next;
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}
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if(i!=0) i--;
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length=sizeof(struct ospf_lsreq_packet)+(j-i)*sizeof(struct ospf_lsreq_header);
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op->length=htons(length);
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ospf_pkt_finalize(n->ifa, op);
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sk_send_to(n->ifa->ip_sk,length, n->ip, OSPF_PROTO);
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OSPF_TRACE(D_PACKETS, "LS request sent to: %I", n->rid);
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}
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void
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ospf_lsreq_rx(struct ospf_lsreq_packet *ps, struct proto *p,
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struct ospf_iface *ifa, u16 size)
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{
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u32 nrid, myrid;
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struct ospf_neighbor *n;
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struct ospf_lsreq_header *lsh;
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struct l_lsr_head *llsh;
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list uplist;
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slab *upslab;
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int length;
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int i,lsano;
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nrid=ntohl(ps->ospf_packet.routerid);
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myrid=p->cf->global->router_id;
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if((n=find_neigh(ifa, nrid))==NULL)
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{
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OSPF_TRACE(D_PACKETS, "Received lsreq from unknown neighbor! (%I)",
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nrid);
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return ;
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}
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if(n->state<NEIGHBOR_EXCHANGE) return;
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OSPF_TRACE(D_EVENTS, "Received LS req from neighbor: %I", n->ip);
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ospf_neigh_sm(n, INM_HELLOREC);
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length=ntohs(ps->ospf_packet.length);
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lsh=(void *)(ps+1);
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init_list(&uplist);
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upslab=sl_new(n->pool,sizeof(struct l_lsr_head));
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lsano=(length-sizeof(struct ospf_lsreq_packet))/
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sizeof(struct ospf_lsreq_header);
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for(i=0;i<lsano;lsh++,i++)
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{
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DBG("Processing LSA: ID=%I, Type=%u, Router=%I\n", ntohl(lsh->id),
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lsh->type, ntohl(lsh->rt));
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llsh=sl_alloc(upslab);
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llsh->lsh.id=ntohl(lsh->id);
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llsh->lsh.rt=ntohl(lsh->rt);
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llsh->lsh.type=lsh->type;
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add_tail(&uplist, NODE llsh);
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if(ospf_hash_find(n->ifa->oa->gr, llsh->lsh.id, llsh->lsh.rt,
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llsh->lsh.type)==NULL)
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{
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log("Received bad LS req from: %I looking: RT: %I, ID: %I, Type: %u",
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n->ip, lsh->rt, lsh->id, lsh->type);
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ospf_neigh_sm(n,INM_BADLSREQ);
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rfree(upslab);
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return;
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}
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}
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ospf_lsupd_tx_list(n, &uplist);
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rfree(upslab);
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}
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