2000-03-30 20:00:42 +00:00
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/*
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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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2000-04-18 01:06:16 +00:00
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/* Note, that h is in network endianity! */
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2000-03-30 20:00:42 +00:00
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void
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2000-04-18 01:06:16 +00:00
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ospf_lsack_direct_tx(struct ospf_neighbor *n,struct ospf_lsa_header *h)
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2000-03-30 20:00:42 +00:00
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{
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2000-04-18 01:06:16 +00:00
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struct ospf_packet *op;
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struct ospf_lsack_packet *pk;
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sock *sk=n->ifa->ip_sk;
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2000-05-09 18:17:34 +00:00
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struct proto *p=&n->ifa->proto->proto;
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2000-04-18 01:06:16 +00:00
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u16 len;
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2000-04-18 20:34:19 +00:00
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DBG("Sending direct ACK to %I for Type: %u, ID: %I, RT: %I\n",n->rid,
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h->type, ntohl(h->id), ntohl(h->rt));
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2000-04-18 17:00:56 +00:00
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2000-04-18 01:06:16 +00:00
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pk=(struct ospf_lsack_packet *)sk->tbuf;
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op=(struct ospf_packet *)sk->tbuf;
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2000-06-03 01:29:00 +00:00
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fill_ospf_pkt_hdr(n->ifa, pk, LSACK_P);
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2000-04-18 01:06:16 +00:00
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memcpy(pk+1,h,sizeof(struct ospf_lsa_header));
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len=sizeof(struct ospf_lsack_packet)+sizeof(struct ospf_lsa_header);
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op->length=htons(len);
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ospf_pkt_finalize(n->ifa, op);
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sk_send_to(sk,len, n->ip, OSPF_PROTO);
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2000-05-09 18:17:34 +00:00
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debug("%s: LS ack sent to %I\n", p->name, n->ip);
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2000-04-18 01:06:16 +00:00
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}
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void
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ospf_lsa_delay(struct ospf_neighbor *n,struct ospf_lsa_header *h,
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struct proto *p)
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{
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struct lsah_n *no;
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no=mb_alloc(p->pool,sizeof(struct lsah_n));
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memcpy(&no->lsa,h,sizeof(struct ospf_lsa_header));
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add_tail(&n->ackl, NODE no);
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2000-04-18 17:36:46 +00:00
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DBG("Adding delay ack for %I, ID: %I, RT: %I, Type: %u\n",n->rid,
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ntohl(h->id), ntohl(h->rt),h->type);
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2000-04-18 01:06:16 +00:00
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}
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void
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ackd_timer_hook(timer *t)
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{
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struct ospf_neighbor *n=t->data;
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if(!EMPTY_LIST(n->ackl)) ospf_lsack_delay_tx(n);
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}
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void
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ospf_lsack_delay_tx(struct ospf_neighbor *n)
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{
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struct ospf_packet *op;
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struct ospf_lsack_packet *pk;
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sock *sk;
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u16 len,i=0;
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struct ospf_lsa_header *h;
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struct lsah_n *no;
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struct ospf_iface *ifa=n->ifa;
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2000-05-11 22:00:16 +00:00
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debug("%s: LS ack sent to %I (delayed)\n",n->ifa->proto->proto.name,n->ip);
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2000-04-18 17:00:56 +00:00
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2000-04-18 01:06:16 +00:00
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if(ifa->type==OSPF_IT_BCAST)
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{
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sk=ifa->hello_sk;
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}
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else
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{
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sk=ifa->ip_sk;
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}
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pk=(struct ospf_lsack_packet *)sk->tbuf;
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op=(struct ospf_packet *)sk->tbuf;
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2000-06-03 01:29:00 +00:00
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fill_ospf_pkt_hdr(n->ifa, pk, LSACK_P);
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2000-04-18 01:06:16 +00:00
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h=(struct ospf_lsa_header *)(pk+1);
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while(!EMPTY_LIST(n->ackl))
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{
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no=(struct lsah_n *)HEAD(n->ackl);
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memcpy(h+i,&no->lsa, sizeof(struct ospf_lsa_header));
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i++;
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2000-04-18 17:00:56 +00:00
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DBG("Iter %u ID: %I, RT: %I, Type: %u\n",i, ntohl((h+i)->id),
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ntohl((h+i)->rt),(h+i)->type);
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rem_node(NODE no);
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2000-04-18 17:36:46 +00:00
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mb_free(no);
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2000-04-18 17:00:56 +00:00
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if((i*sizeof(struct ospf_lsa_header)+sizeof(struct ospf_lsack_packet)+SIPH)>
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2000-04-18 01:06:16 +00:00
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n->ifa->iface->mtu)
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{
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if(!EMPTY_LIST(n->ackl))
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{
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len=sizeof(struct ospf_lsack_packet)+i*sizeof(struct ospf_lsa_header);
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op->length=htons(len);
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ospf_pkt_finalize(n->ifa, op);
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2000-04-18 17:36:46 +00:00
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DBG("Sending and continueing! Len=%u\n",len);
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2000-04-18 01:06:16 +00:00
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if(ifa->type==OSPF_IT_BCAST)
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{
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if((ifa->state==OSPF_IS_DR)||(ifa->state==OSPF_IS_BACKUP))
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{
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sk_send_to(sk ,len, AllSPFRouters, OSPF_PROTO);
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}
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else
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{
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sk_send_to(sk ,len, AllDRouters, OSPF_PROTO);
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}
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}
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else
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{
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sk_send_to_agt(sk, len, ifa, NEIGHBOR_EXCHANGE);
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}
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2000-04-18 17:36:46 +00:00
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2000-06-03 01:29:00 +00:00
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fill_ospf_pkt_hdr(n->ifa, pk, LSACK_P);
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2000-04-18 01:06:16 +00:00
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i=0;
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}
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}
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}
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len=sizeof(struct ospf_lsack_packet)+i*sizeof(struct ospf_lsa_header);
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op->length=htons(len);
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ospf_pkt_finalize(n->ifa, op);
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2000-04-18 17:00:56 +00:00
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DBG("Sending! Len=%u\n",len);
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2000-04-18 01:06:16 +00:00
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if(ifa->type==OSPF_IT_BCAST)
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{
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if((ifa->state==OSPF_IS_DR)||(ifa->state==OSPF_IS_BACKUP))
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{
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sk_send_to(sk ,len, AllSPFRouters, OSPF_PROTO);
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}
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else
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{
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sk_send_to(sk ,len, AllDRouters, OSPF_PROTO);
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}
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}
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else
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{
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sk_send_to_agt(sk, len, ifa, NEIGHBOR_EXCHANGE);
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}
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2000-03-30 20:00:42 +00:00
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}
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2000-04-18 01:06:16 +00:00
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2000-03-30 20:00:42 +00:00
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void
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ospf_lsack_rx(struct ospf_lsack_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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2000-04-12 15:20:13 +00:00
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struct ospf_lsa_header lsa,*plsa;
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2000-03-30 20:00:42 +00:00
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int length;
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2000-04-12 15:20:13 +00:00
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u16 nolsa,i;
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struct top_hash_entry *en;
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2000-05-11 22:00:16 +00:00
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u16 lenn=ntohs(ps->ospf_packet.length);
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2000-03-30 20:00:42 +00:00
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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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2000-05-09 18:17:34 +00:00
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debug("%s: Received LS ack from unknown neigbor! (%I)\n", p->name,
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2000-03-30 20:00:42 +00:00
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nrid);
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return ;
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}
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2000-04-12 15:37:52 +00:00
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2000-05-11 22:00:16 +00:00
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debug("%s: Received LS ack from %I\n", p->name, n->ip);
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2000-05-09 18:17:34 +00:00
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2000-05-11 22:00:16 +00:00
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if(n->state<NEIGHBOR_EXCHANGE) return;
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2000-05-09 18:17:34 +00:00
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2000-05-11 22:00:16 +00:00
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nolsa=(lenn-sizeof(struct ospf_lsack_packet))/
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2000-04-12 15:20:13 +00:00
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sizeof(struct ospf_lsa_header);
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2000-05-11 22:00:16 +00:00
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if((nolsa<1)||((lenn-sizeof(struct ospf_lsack_packet))!=
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(nolsa*sizeof(struct ospf_lsa_header))))
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{
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log("%s: Received corrupted LS ack from %I\n", p->name, n->ip);
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return;
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}
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plsa=(struct ospf_lsa_header *)(ps+1);
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2000-04-12 15:20:13 +00:00
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for(i=0;i<nolsa;i++)
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{
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ntohlsah(plsa+i,&lsa);
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if((en=ospf_hash_find_header(n->lsrth,&lsa))==NULL) continue;
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if(lsa_comp(&lsa,&en->lsa)!=CMP_SAME)
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{
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2000-05-31 18:21:42 +00:00
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if((lsa.sn==LSA_MAXSEQNO)&&(lsa.age==LSA_MAXAGE)) continue;
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2000-05-11 22:00:16 +00:00
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debug("%s: Strange LS acknoledgement from %I\n",p->name,n->ip);
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debug("%s: Id: %I, Rt: %I, Type: %u\n",p->name,lsa.id,lsa.rt,lsa.type);
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2000-06-02 11:00:14 +00:00
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debug("%s: I have: Age: %4u, Seqno: 0x%08x, Sum: %u\n",
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p->name, en->lsa.age, en->lsa.sn, en->lsa.checksum);
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debug("%s: He has: Age: %4u, Seqno: 0x%08x, Sum: %u\n",
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2000-06-04 17:33:15 +00:00
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p->name,lsa.age,lsa.sn,lsa.checksum);
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2000-04-12 15:20:13 +00:00
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continue;
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}
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2000-04-12 15:37:52 +00:00
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DBG("Deleting LS Id: %I RT: %I Type: %u from LS Retl for neighbor %I\n",
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2000-04-12 15:20:13 +00:00
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lsa.id,lsa.rt,lsa.type,n->rid);
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s_rem_node(SNODE en);
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ospf_hash_delete(n->lsrth,en);
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}
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2000-03-30 20:00:42 +00:00
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}
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