126 lines
3 KiB
C
126 lines
3 KiB
C
/*
|
|
* 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);
|
|
}
|
|
|