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/*
* 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(sn==NULL)
{
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);
lsh++;
DBG("Requesting %uth LSA: Type: %u, Id: %u, RT: %u\n",i, en->lsa.type,
en->lsa.id, en->lsa.rt);
if((sn=sn->next)==NULL) break;
}
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;
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);
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", lsh->id, lsh->type,
lsh->rt);
if(ospf_hash_find(n->ifa->oa->gr, lsh->id, lsh->rt, lsh->type)==NULL)
{
ospf_neigh_sm(n,INM_BADLSREQ);
return;
}
/* FIXME Go on */
}
}
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