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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_lsupd_tx(struct ospf_neighbor *n)
{
/* FIXME Go on! */
}
void /* I send all I received in LSREQ */
ospf_lsupd_tx_list(struct ospf_neighbor *n, list *l)
{
struct l_lsr_head *llsh;
u16 len;
u32 lsano;
struct top_hash_entry *en;
struct ospf_lsupd_packet *pk;
struct ospf_packet *op;
void *pktpos;
u8 ii;
u8 *jj=n->ifa->ip_sk->tbuf;
if(HEAD(*l)==NULL) return;
pk=(struct ospf_lsupd_packet *)n->ifa->ip_sk->tbuf;
op=(struct ospf_packet *)n->ifa->ip_sk->tbuf;
DBG("LSupd: 1st packet\n");
fill_ospf_pkt_hdr(n->ifa, pk, LSUPD);
len=SIPH+sizeof(struct ospf_lsupd_packet);
lsano=0;
pktpos=(pk+1);
WALK_LIST(llsh, *l)
{
en=ospf_hash_find(n->ifa->oa->gr,llsh->lsh.id,llsh->lsh.rt,llsh->lsh.type);
DBG("Sending ID=%u, Type=%u, RT=%u\n", llsh->lsh.id, llsh->lsh.type,
llsh->lsh.rt);
if((len+sizeof(struct ospf_lsa_header)+en->lsa.length)>n->ifa->iface->mtu)
{
pk->lsano=htonl(lsano);
op->length=htons(len);
ospf_pkt_finalize(n->ifa, op);
for(ii=0;ii<(len-SIPH);ii+=4)
DBG("Out dump: %d,%d,%d,%d\n", *(jj+ii), *(jj+ii+1), *(jj+ii+2), *(jj+ii+3));
sk_send_to(n->ifa->ip_sk,len, n->ip, OSPF_PROTO);
DBG("LSupd: next packet\n");
fill_ospf_pkt_hdr(n->ifa, pk, LSUPD);
len=SIPH+sizeof(struct ospf_lsupd_packet);
lsano=0;
pktpos=(pk+1);
}
htonlsah(&(en->lsa), pktpos);
pktpos=pktpos+sizeof(struct ospf_lsa_header);
htonlsab(en->lsa_body, pktpos, en->lsa.type, en->lsa.length);
pktpos=pktpos+en->lsa.length-sizeof(struct ospf_lsa_header);
len=len+en->lsa.length;
lsano++;
}
pk->lsano=htonl(lsano);
op->length=htons(len-SIPH);
ospf_pkt_finalize(n->ifa, op);
for(ii=0;ii<(len-SIPH);ii+=4)
DBG("Out dump: %d,%d,%d,%d\n", *(jj+ii), *(jj+ii+1), *(jj+ii+2), *(jj+ii+3));
sk_send_to(n->ifa->ip_sk,len, n->ip, OSPF_PROTO);
DBG("LSupd: sent\n");
}
void
ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p,
struct ospf_iface *ifa, u16 size)
{
u32 area,nrid,myrid;
struct ospf_neighbor *n,*ntmp;
struct ospf_lsa_header *lsa;
struct ospf_area *oa;
struct proto_ospf *po=(struct proto_ospf *)p;
u16 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 lsupd from unknown neigbor! (%u)\n", p->name,
nrid);
return ;
}
if(n->state<NEIGHBOR_EXCHANGE)
{
debug("%s: Received lsupd in lesser state than EXCHANGE from (%u)\n",
p->name);
return;
}
lsa=(struct ospf_lsa_header *)(ps+1);
area=htonl(ps->ospf_packet.areaid);
oa=ospf_find_area((struct proto_ospf *)p,area);
for(i=0;i<ntohl(ps->lsano);i++,
lsa=(struct ospf_lsa_header *)(((u8 *)lsa)+ntohs(lsa->length)))
{
struct ospf_lsa_header lsatmp;
struct top_hash_entry *lsadb;
if(lsa->checksum!=lsasum_check(lsa,NULL,po))
{
log("Received bad lsa checksum from %u\n",n->rid);
continue;
}
if((lsa->type<LSA_T_RT)||(lsa->type>LSA_T_EXT))
{
log("Unknown LSA type from %u\n",n->rid);
continue;
}
if((lsa->type==LSA_T_EXT)&&oa->stub)
{
log("Received External LSA in stub area from %u\n",n->rid);
continue;
}
ntohlsah(lsa,&lsatmp);
DBG("Processing update Type: %u ID: %u RT: %u\n",lsatmp.type,
lsatmp.id, lsatmp.rt);
lsadb=ospf_hash_find_header(oa->gr, &lsatmp);
/* Remove it from link state request list */
WALK_LIST(NODE ifa,po->iface_list)
WALK_LIST(NODE ntmp,ifa->neigh_list)
{
struct top_hash_entry *en;
if(ntmp->state>NEIGHBOR_EXSTART)
if((en=ospf_hash_find_header(ntmp->lsrqh,&lsatmp))!=NULL)
{
s_rem_node(SNODE en);
DBG("Removing from lsreq list for neigh %u\n", ntmp->rid);
ospf_hash_delete(ntmp->lsrqh,en);
if(EMPTY_SLIST(ntmp->lsrql)) ospf_neigh_sm(ntmp, INM_LOADDONE);
}
}
if((lsatmp.age==LSA_MAXAGE)&&(lsadb==NULL))
{
struct ospf_neighbor *n=NULL;
struct ospf_iface *ifa=NULL;
int flag=0;
WALK_LIST(NODE ifa,po->iface_list)
WALK_LIST(NODE ntmp,ifa->neigh_list)
if((ntmp->state==NEIGHBOR_EXCHANGE)&&
(ntmp->state==NEIGHBOR_LOADING))
flag=1;
if(flag==0)
{
add_ack_list(n,lsa);
continue;
}
}
if((lsadb==NULL)||(lsa_comp(&lsatmp,&lsadb->lsa)==CMP_NEWER))
{
struct ospf_neighbor *n=NULL;
struct ospf_iface *ifa=NULL;
void *body;
/* FIXME self originated? */
if(lsadb && ((lsadb->inst_t-now)<MINLSARRIVAL)) continue;
/* Remove old from all ret lists */
if(lsadb)
WALK_LIST(NODE ifa,po->iface_list)
WALK_LIST(NODE ntmp,ifa->neigh_list)
{
struct top_hash_entry *en;
if(ntmp->state>NEIGHBOR_EXSTART)
if((en=ospf_hash_find_header(ntmp->lsrth,&lsadb->lsa))!=NULL)
{
s_rem_node(SNODE en);
ospf_hash_delete(ntmp->lsrth,en);
}
}
/* Install new */
body=mb_alloc(p->pool,lsatmp.length-sizeof(struct ospf_lsa_header));
ntohlsab(lsa+1,body,lsatmp.type,lsatmp.length-sizeof(struct ospf_lsa_header));
lsadb=lsa_install_new(&lsatmp,body, oa);
DBG("New LSA installed in DB\n");
continue;
}
/* FIXME pg144 (6)?? */
if(lsa_comp(&lsatmp,&lsadb->lsa)==CMP_SAME)
{
struct top_hash_entry *en;
if((en=ospf_hash_find_header(n->lsrth,&lsadb->lsa))!=NULL)
s_rem_node(SNODE en);
/* FIXME ack_lsa() */
continue;
}
if((lsadb->lsa.age==LSA_MAXAGE)&&(lsadb->lsa.sn==LSA_MAXSEQNO)) continue;
/* FIXME lsa_send(n,lsa) */
}
}
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