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Sending of DBDes. (Checksum and length calculation NOT done.)

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This commit is contained in:
Ondrej Filip 2000-03-08 12:50:28 +00:00
parent 839380d7ec
commit 30147b89ff
8 changed files with 94 additions and 15 deletions
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72
proto/ospf/dbdes.c
View File

@ -1,7 +1,7 @@
/*
* BIRD -- OSPF
*
* (c) 1999 Ondrej Filip <feela@network.cz>
* (c) 1999-2000 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
@ -16,19 +16,20 @@ ospf_dbdes_tx(struct ospf_neighbor *n)
struct ospf_iface *ifa;
u16 length;
struct proto *p;
u16 i,j;
u8 *aa,*bb;
ifa=n->ifa;
p=(struct proto *)(ifa->proto);
pkt=(struct ospf_dbdes_packet *)(ifa->ip_sk->tbuf);
op=(struct ospf_packet *)pkt;
switch(n->state)
{
case NEIGHBOR_EXSTART: /* Send empty packets */
pkt=(struct ospf_dbdes_packet *)(ifa->ip_sk->tbuf);
op=(struct ospf_packet *)pkt;
fill_ospf_pkt_hdr(ifa, pkt, DBDES);
pkt->iface_mtu= ((struct iface *)ifa)->mtu;
pkt->iface_mtu=ifa->iface->mtu;
pkt->options= ifa->options;
pkt->imms=n->myimms;
pkt->ddseq=n->dds;
@ -37,8 +38,67 @@ ospf_dbdes_tx(struct ospf_neighbor *n)
ospf_pkt_finalize(ifa, op);
sk_send_to(ifa->ip_sk,length, n->ip, OSPF_PROTO);
debug("%s: DB_DES sent for %u.\n", p->name, n->rid);
break;
case NEIGHBOR_EXCHANGE:
if(! ((IAMMASTER(n->myimms) && (n->dds==n->ddr+1)) || ((!IAMMASTER(n->myimms)) && (n->dds==n->ddr))))
{
snode *sn; /* Send next */
struct ospf_lsaheader *lsa;
fill_ospf_pkt_hdr(ifa, pkt, DBDES);
pkt->iface_mtu= ifa->iface->mtu;
pkt->options= ifa->options;
pkt->ddseq=n->dds;
sn=s_get(&(n->dbsi));
j=i=(pkt->iface_mtu-sizeof(struct ospf_dbdes_packet))/sizeof(struct ospf_lsaheader); /* Number of lsaheaders */
lsa=(n->ldbdes+sizeof(struct ospf_dbdes_packet));
for(;i>0;i--)
{
struct top_hash_entry *en;
en=(struct top_hash_entry *)sn;
lsa->lsage=htons(en->lsage);
lsa->options=htons(en->options);
lsa->lstype=htons(en->lsa_type);
lsa->lsid=htons(en->lsa_id);
lsa->advr=htons(en->rtr_id);
lsa->lssn=htons(en->lsseqno);
lsa->length=htons(en->length);
lsa->checksum=htons(en->checksum);
if(sn->next==NULL)
{
break; /* Should set some flag? */
}
sn=sn->next;
}
s_put(&(n->dbsi),sn);
if(sn->next==NULL)
{
n->myimms=(n->myimms-DBDES_M); /* Unset more bit */
}
pkt->imms=n->myimms;
length=j*sizeof(struct ospf_lsaheader)+sizeof(struct ospf_dbdes_packet);
op->length=htons(length);
ospf_pkt_finalize(ifa, op);
sk_send_to(ifa->ip_sk,length, n->ip, OSPF_PROTO);
}
aa=ifa->ip_sk->tbuf;
bb=n->ldbdes;
length=ntohs(op->length);
for(i=0; i<ifa->iface->mtu; i++)
{
*(aa+i)=*(bb+i); /* Copy last sent packet again */
}
sk_send_to(ifa->ip_sk,length, n->ip, OSPF_PROTO);
/*case NEIGHBOR_EXCHANGE: */
default: /* Ignore it */
break;
}

1
proto/ospf/hello.c
View File

@ -103,6 +103,7 @@ ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
n->options=ps->options;
n->ifa=ifa;
n->adj=0;
n->ldbdes=mb_alloc(p->pool, ifa->iface->mtu);
neigh_chstate(n,NEIGHBOR_DOWN);
install_inactim(n);
}

3
proto/ospf/iface.c
View File

@ -233,7 +233,8 @@ ospf_iface_default(struct ospf_iface *ifa)
{
u8 i;
ifa->area=0; /* FIXME: Read from config */
ifa->oa=NULL;
ifa->an=0; /* FIXME This should respect config */
ifa->cost=COST_D;
ifa->rxmtint=RXMTINT_D;
ifa->iftransdelay=IFTRANSDELAY_D;

5
proto/ospf/neighbor.c
View File

@ -204,7 +204,10 @@ ospf_neigh_sm(struct ospf_neighbor *n, int event)
if(n->state==NEIGHBOR_EXSTART)
{
neigh_chstate(n,NEIGHBOR_EXCHANGE);
/* FIXME Go on... */
s_init_list(&(n->lsrql));
s_init_list(&(n->lsrtl));
s_init(&(n->dbsi), &(n->ifa->oa->lsal));
ospf_dbdes_tx(n);
}
break;
case INM_EXDONE:

11
proto/ospf/ospf.h
View File

@ -21,6 +21,7 @@
#include "lib/checksum.h"
#include "lib/ip.h"
#include "lib/lists.h"
#include "lib/slists.h"
#include "lib/socket.h"
#include "lib/timer.h"
#include "lib/resource.h"
@ -60,10 +61,11 @@ struct ospf_iface {
node n;
struct proto_ospf *proto;
struct iface *iface; /* Nest's iface */
struct ospf_area *oa;
u32 an; /* Area number */
sock *hello_sk; /* Hello socket */
sock *ip_sk; /* IP socket (for DD ...) */
list neigh_list; /* List of neigbours */
u32 area; /* OSPF Area */
u16 cost; /* Cost of iface */
u16 rxmtint; /* number of seconds between LSA retransmissions */
u16 iftransdelay; /* The estimated number of seconds it takes to
@ -183,6 +185,12 @@ struct ospf_neighbor
u32 dr; /* Neigbour's idea of DR */
u32 bdr; /* Neigbour's idea of BDR */
u8 adj; /* built adjacency? */
siterator dbsi; /* Database summary list iterator */
slist lsrql; /* Link state request */ /* FIXME add top_gr hashing? */
siterator lsrqi;
slist lsrtl; /* Link state retransmission list */
siterator lsrti;
void *ldbdes; /* Last database description packet */
};
/* Definitions for interface state machine */
@ -213,6 +221,7 @@ struct ospf_area {
struct ospf_area *next;
u32 areaid;
struct top_graph *gr; /* LSA graph */
slist lsal; /* List of all LSA's */
struct top_hash_entry *rt; /* My own router LSA */
slab *rtlinks;
};

4
proto/ospf/packet.c
View File

@ -23,7 +23,7 @@ fill_ospf_pkt_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
pkt->type=h_type;
pkt->routerid=htonl(p->cf->global->router_id);
pkt->areaid=htonl(ifa->area);
pkt->areaid=htonl(ifa->an);
pkt->autype=htons(ifa->autype);
pkt->checksum=0;
}
@ -101,7 +101,7 @@ ospf_rx_hook(sock *sk, int size)
/* FIXME: Do authetification */
if(ps->areaid!=ifa->area)
if(ps->areaid!=ifa->an)
{
log("%s: Bad OSPF packet received: other area %ld", p->name, ps->areaid);
log("%s: Discarding",p->name);

11
proto/ospf/topology.c
View File

@ -38,22 +38,25 @@ addifa_rtlsa(struct ospf_iface *ifa)
while(oa!=NULL)
{
if(oa->areaid==ifa->area) break;
if(oa->areaid==ifa->an) break;
oa=oa->next;
}
ifa->oa=oa;
if(oa==NULL) /* New area */
{
oa=po->firstarea;
po->firstarea=mb_alloc(po->proto.pool, sizeof(struct ospf_area));
po->firstarea->next=oa;
oa=po->firstarea;
oa->areaid=ifa->area;
oa->areaid=ifa->an;
oa->gr=ospf_top_new(po);
s_init_list(&(oa->lsal));
oa->rtlinks=sl_new(po->proto.pool,
sizeof(struct top_graph_rtlsa_link));
oa->rt=ospf_hash_get(oa->gr, rtid, rtid, LSA_T_RT);
DBG("XXXXXX %x XXXXXXX\n", oa->rt);
s_add_head(&(oa->lsal), (snode *)oa->rt);
rt=mb_alloc(po->proto.pool, sizeof(struct top_graph_rtlsa));
oa->rt->vertex=(void *)rt;
oa->rt->lsage=0;
@ -61,7 +64,7 @@ addifa_rtlsa(struct ospf_iface *ifa)
rt->Vbit=0;
rt->Ebit= (po->areano++ ? 0 : 1); /* If it's 1st area set 0 */
rt->Bbit=0; /* FIXME Could read config */
DBG("%s: New OSPF area \"%d\" added.\n", po->proto.name, ifa->area);
DBG("%s: New OSPF area \"%d\" added.\n", po->proto.name, ifa->an);
if(po->areano==2) /* We are attached to more than 2 areas! */
{

2
proto/ospf/topology.h
View File

@ -10,6 +10,7 @@
#define _BIRD_OSPF_TOPOLOGY_H_
struct top_hash_entry { /* Index for fast mapping (type,rtrid,LSid)->vertex */
snode n;
struct top_hash_entry *next; /* Next in hash chain */
struct top_vertex *vertex;
u32 lsa_id, rtr_id;
@ -25,6 +26,7 @@ struct top_hash_entry { /* Index for fast mapping (type,rtrid,LSid)->vertex */
#define LSA_CHECKAGE 300 /* 5 minutes */
#define LSA_MAXAGEDIFF 900 /* 15 minutes */
u32 lsseqno;
u16 length, checksum;
#define LSA_INITSEQNO 0x80000001
#define LSA_MAXSEQNO 0x7fffffff
};