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Sending DBDES packet in EXSTART done.

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This commit is contained in:
Ondrej Filip 1999-11-10 16:06:12 +00:00
parent 1183b6b229
commit 986e34131d
2 changed files with 103 additions and 44 deletions
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139
proto/ospf/ospf.c
View file

@ -20,6 +20,79 @@
#define IAMMASTER(x) ((x) & DBDES_MS) #define IAMMASTER(x) ((x) & DBDES_MS)
#define INISET(x) ((x) & DBDES_I) #define INISET(x) ((x) & DBDES_I)
void
fill_ospf_pkt_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
{
struct ospf_packet *pkt;
struct proto *p;
p=(struct proto *)(ifa->proto);
pkt=(struct ospf_packet *)buf;
pkt->version=OSPF_VERSION;
pkt->type=h_type;
pkt->routerid=htonl(p->cf->global->router_id);
pkt->areaid=htonl(ifa->area);
pkt->autype=htons(ifa->autype);
pkt->checksum=0;
}
void
ospf_tx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt)
{
/* FIXME Nothing done */
}
void
ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
{
ospf_tx_authenticate(ifa, pkt);
/* Count checksum */
pkt->checksum=ipsum_calculate(pkt,sizeof(struct ospf_packet)-8,
(pkt+1),ntohs(pkt->length)-sizeof(struct ospf_packet),NULL);
}
void ospf_dbdes_tx(struct ospf_iface *ifa)
{
struct ospf_dbdes_packet *pkt;
struct ospf_packet *op;
struct ospf_neighbor *n;
u16 length;
struct proto *p;
p=(struct proto *)(ifa->proto);
WALK_LIST (n, ifa->neigh_list) /* Try to send db_des */
{
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->options= ifa->options;
pkt->imms=n->myimms;
pkt->ddseq=n->dds;
length=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);
debug("%s: DB_DES sent for %u.\n", p->name, n->rid);
/*case NEIGHBOR_EXCHANGE: */
default: /* Ignore it */
break;
}
}
}
void void
rxmt_timer_hook(timer *timer) rxmt_timer_hook(timer *timer)
{ {
@ -30,6 +103,7 @@ rxmt_timer_hook(timer *timer)
p=(struct proto *)(ifa->proto); p=(struct proto *)(ifa->proto);
debug("%s: RXMT timer fired on interface %s.\n", debug("%s: RXMT timer fired on interface %s.\n",
p->name, ifa->iface->name); p->name, ifa->iface->name);
ospf_dbdes_tx(ifa);
} }
struct ospf_neighbor * struct ospf_neighbor *
@ -560,15 +634,23 @@ ospf_dbdes_rx(struct ospf_dbdes_packet *ps, struct proto *p,
debug("%s: I'm slave to %u. \n", p->name, nrid); debug("%s: I'm slave to %u. \n", p->name, nrid);
ospf_neigh_sm(n, INM_NEGDONE); ospf_neigh_sm(n, INM_NEGDONE);
} }
if(((ps->imms | DBDES_M)== DBDES_M) && (n->rid < myrid) && else
(n->dds == ps->ddseq) && (size == sizeof(struct ospf_dbdes_packet)))
{ {
/* I'm master! */ if(((ps->imms & (DBDES_I|DBDES_MS))== 0) && (n->rid < myrid) &&
n->options=ps->options; (n->dds == ps->ddseq))
n->ddr=ps->ddseq; {
n->imms=ps->imms; /* I'm master! */
debug("%s: I'm master to %u. \n", p->name, nrid); n->options=ps->options;
ospf_neigh_sm(n, INM_NEGDONE); n->ddr=ps->ddseq;
n->imms=ps->imms;
debug("%s: I'm master to %u. \n", p->name, nrid);
ospf_neigh_sm(n, INM_NEGDONE);
}
else
{
debug("%s: Nothing happend to %u (imms=%u)", p->name, nrid,
ps->imms);
}
} }
break; break;
@ -639,12 +721,15 @@ ospf_dbdes_rx(struct ospf_dbdes_packet *ps, struct proto *p,
ospf_neigh_sm(n, INM_SEQMIS); ospf_neigh_sm(n, INM_SEQMIS);
} }
break; break;
defaut:
die("%s: Received dbdes from %u in unknown state. (%u)\n", p->name, nrid);
break;
} }
} }
void void
ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p, ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
struct ospf_iface *ifa, int size) struct ospf_iface *ifa, int size, ip_addr faddr)
{ {
char sip[100]; /* FIXME: Should be smaller */ char sip[100]; /* FIXME: Should be smaller */
u32 nrid, *pnrid; u32 nrid, *pnrid;
@ -692,6 +777,7 @@ ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
n=mb_alloc(p->pool, sizeof(struct ospf_neighbor)); n=mb_alloc(p->pool, sizeof(struct ospf_neighbor));
add_tail(&ifa->neigh_list, NODE n); add_tail(&ifa->neigh_list, NODE n);
n->rid=nrid; n->rid=nrid;
n->ip=faddr;
n->dr=ntohl(ps->dr); n->dr=ntohl(ps->dr);
n->bdr=ntohl(ps->bdr); n->bdr=ntohl(ps->bdr);
n->priority=ps->priority; n->priority=ps->priority;
@ -730,7 +816,6 @@ ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
(n->state>=NEIGHBOR_2WAY)) (n->state>=NEIGHBOR_2WAY))
{ {
ospf_int_sm(ifa, ISM_BACKS); ospf_int_sm(ifa, ISM_BACKS);
DBG("BACKS");
} }
if((n->rid==ntohl(ps->dr)) && (n->dr!=ntohl(ps->dr))) if((n->rid==ntohl(ps->dr)) && (n->dr!=ntohl(ps->dr)))
{ {
@ -746,7 +831,6 @@ ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
if((n->rid==ntohl(ps->bdr)) && (n->state>=NEIGHBOR_2WAY)) if((n->rid==ntohl(ps->bdr)) && (n->state>=NEIGHBOR_2WAY))
{ {
ospf_int_sm(ifa, ISM_BACKS); ospf_int_sm(ifa, ISM_BACKS);
DBG("BACKS");
} }
if((n->rid==ntohl(ps->bdr)) && (n->bdr!=ntohl(ps->bdr))) if((n->rid==ntohl(ps->bdr)) && (n->bdr!=ntohl(ps->bdr)))
{ {
@ -769,7 +853,7 @@ ospf_rx_hook(sock *sk, int size)
struct ospf_packet *ps; struct ospf_packet *ps;
struct ospf_iface *ifa; struct ospf_iface *ifa;
struct proto *p; struct proto *p;
u8 i; int i;
u8 *pu8; u8 *pu8;
@ -849,7 +933,7 @@ ospf_rx_hook(sock *sk, int size)
{ {
case HELLO: case HELLO:
DBG("%s: Hello received.\n", p->name); DBG("%s: Hello received.\n", p->name);
ospf_hello_rx((struct ospf_hello_packet *)ps, p, ifa, size); ospf_hello_rx((struct ospf_hello_packet *)ps, p, ifa, size, sk->faddr);
break; break;
case DBDES: case DBDES:
DBG("%s: Database description received.\n", p->name); DBG("%s: Database description received.\n", p->name);
@ -1003,26 +1087,6 @@ ospf_iface_clasify(struct iface *ifa)
return OSPF_IT_PTP; return OSPF_IT_PTP;
} }
void
fill_ospf_pkt_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
{
struct ospf_packet *pkt;
struct proto *p;
p=(struct proto *)(ifa->proto);
pkt=(struct ospf_packet *)buf;
pkt->version=OSPF_VERSION;
pkt->type=h_type;
pkt->routerid=htonl(p->cf->global->router_id);
pkt->areaid=htonl(ifa->area);
pkt->autype=htons(ifa->autype);
pkt->checksum=0;
}
void void
hello_timer_hook(timer *timer) hello_timer_hook(timer *timer)
{ {
@ -1068,14 +1132,9 @@ hello_timer_hook(timer *timer)
} }
length=sizeof(struct ospf_hello_packet)+i*sizeof(u32); length=sizeof(struct ospf_hello_packet)+i*sizeof(u32);
op->length=htons(length);
op->length=ntohs(length); ospf_pkt_finalize(ifa, op);
/* FIXME Do authentification */
/* Count checksum */
op->checksum=ipsum_calculate(op,sizeof(struct ospf_packet)-8,
&(pkt->netmask),length-sizeof(struct ospf_packet),NULL);
/* And finally send it :-) */ /* And finally send it :-) */
sk_send(ifa->hello_sk,length); sk_send(ifa->hello_sk,length);

8
proto/ospf/ospf.h
View file

@ -160,14 +160,14 @@ struct ospf_neighbor
#define NEIGHBOR_LOADING 6 #define NEIGHBOR_LOADING 6
#define NEIGHBOR_FULL 7 #define NEIGHBOR_FULL 7
timer *inactim; /* Inactivity timer */ timer *inactim; /* Inactivity timer */
u8 imms; /* I, M, Master/slave */ u8 imms; /* I, M, Master/slave received */
u32 dds; /* DD Sequence number being sent */ u32 dds; /* DD Sequence number being sent */
u32 ddr; /* last Dat Des packet received */ u32 ddr; /* last Dat Des packet received */
u8 myimms; /* I, M MS received */ u8 myimms; /* I, M Master/slave */
u8 myoptions; /* Options received */
u32 rid; /* Router ID */ u32 rid; /* Router ID */
ip_addr ip; /* IP of it's interface */
u8 priority; /* Priority */ u8 priority; /* Priority */
u8 options; /* Options */ u8 options; /* Options received */
u32 dr; /* Neigbour's idea of DR */ u32 dr; /* Neigbour's idea of DR */
u32 bdr; /* Neigbour's idea of BDR */ u32 bdr; /* Neigbour's idea of BDR */
u8 adj; /* built adjacency? */ u8 adj; /* built adjacency? */