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Added new parametr 'rx buffer <num>'. BIRD is able to receive

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very large packets (if configured).
This commit is contained in:
Ondrej Filip 2005-03-15 22:06:36 +00:00
parent e6ea2e375e
commit 94c42054ea
7 changed files with 94 additions and 47 deletions
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1
doc/bird.conf.example
View File

@ -120,6 +120,7 @@ protocol static {
# password "pass";
# };
# interface "arc0" {
# rx buffer large;
# type nonbroadcast;
# poll 14;
# dead 75;

6
doc/bird.sgml
View File

@ -1026,6 +1026,7 @@ protocol ospf &lt;name&gt; {
wait &lt;num&gt;;
dead count &lt;num&gt;;
dead &lt;num&gt;;
rx buffer [normal|large|&lt;num&gt;];
type [broadcast|nonbroadcast|pointopoint];
strict nonbroadcast &lt;switch&gt;;
authentication [none|simple];
@ -1134,6 +1135,11 @@ protocol ospf &lt;name&gt; {
<m/dead/ seconds, it will consider the neighbor down. If both directives
<m/dead count/ and <m/dead/ are used, <m/dead/ has precendence.
<tag>rx buffer <M>num</M></tag>
This sets the size of buffer used for receiving packets. The buffer should
be bigger than maximal size of any packets. Value NORMAL (default)
means 2*MTU, value LARGE means maximal allowed packet - 65536.
<tag>type broadcast</tag>
BIRD detects a type of a connected network automatically, but sometimes it's
convenient to force use of a different type manually.

4
proto/ospf/config.Y
View File

@ -26,6 +26,7 @@ CF_KEYWORDS(NEIGHBORS, RFC1583COMPAT, STUB, TICK, COST, RETRANSMIT)
CF_KEYWORDS(HELLO, TRANSMIT, PRIORITY, DEAD, NONBROADCAST, POINTOPOINT, TYPE)
CF_KEYWORDS(NONE, SIMPLE, AUTHENTICATION, STRICT, CRYPTOGRAPHIC)
CF_KEYWORDS(ELIGIBLE, POLL, NETWORKS, HIDDEN, VIRTUAL, LINK)
CF_KEYWORDS(RX, BUFFER, LARGE, NORMAL)
%type <t> opttext
@ -142,6 +143,9 @@ ospf_iface_item:
| AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
| AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
| AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
| RX BUFFER LARGE { OSPF_PATT->rxbuf = OSPF_RXBUF_LARGE ; }
| RX BUFFER NORMAL { OSPF_PATT->rxbuf = OSPF_RXBUF_NORMAL ; }
| RX BUFFER expr { OSPF_PATT->rxbuf = $3 ; if ($3 < OSPF_RXBUF_MINSIZE) cf_error("Buffer size is too small") ; }
| password_list {OSPF_PATT->passwords = (list *) $1; }
;

97
proto/ospf/iface.c
View File

@ -41,6 +41,23 @@ wait_timer_hook(timer * timer)
ospf_iface_sm(ifa, ISM_WAITF);
}
u32
rxbufsize(struct ospf_iface *ifa)
{
switch(ifa->rxbuf)
{
case OSPF_RXBUF_NORMAL:
return (ifa->iface->mtu * 2);
break;
case OSPF_RXBUF_LARGE:
return OSPF_MAX_PKT_SIZE;
break;
default:
return ifa->rxbuf;
break;
}
}
static sock *
ospf_open_ip_socket(struct ospf_iface *ifa)
{
@ -59,7 +76,7 @@ ospf_open_ip_socket(struct ospf_iface *ifa)
ipsk->tx_hook = ospf_tx_hook;
ipsk->err_hook = ospf_err_hook;
ipsk->iface = ifa->iface;
ipsk->rbsize = OSPF_MAX_PKT_SIZE;
ipsk->rbsize = rxbufsize(ifa);
ipsk->tbsize = ifa->iface->mtu;
ipsk->data = (void *) ifa;
if (sk_open(ipsk) != 0)
@ -126,7 +143,7 @@ ospf_iface_chstate(struct ospf_iface *ifa, u8 state)
ifa->dr_sk->tx_hook = ospf_tx_hook;
ifa->dr_sk->err_hook = ospf_err_hook;
ifa->dr_sk->iface = ifa->iface;
ifa->dr_sk->rbsize = OSPF_MAX_PKT_SIZE;
ifa->dr_sk->rbsize = rxbufsize(ifa);
ifa->dr_sk->tbsize = ifa->iface->mtu;
ifa->dr_sk->data = (void *) ifa;
if (sk_open(ifa->dr_sk) != 0)
@ -299,7 +316,7 @@ ospf_open_mc_socket(struct ospf_iface *ifa)
mcsk->tx_hook = ospf_tx_hook;
mcsk->err_hook = ospf_err_hook;
mcsk->iface = ifa->iface;
mcsk->rbsize = OSPF_MAX_PKT_SIZE;
mcsk->rbsize = rxbufsize(ifa);
mcsk->tbsize = ifa->iface->mtu;
mcsk->data = (void *) ifa;
if (sk_open(mcsk) != 0)
@ -397,6 +414,7 @@ ospf_iface_new(struct proto_ospf *po, struct iface *iface,
ifa->stub = ip->stub;
ifa->autype = ip->autype;
ifa->passwords = ip->passwords;
ifa->rxbuf = ip->rxbuf;
if (ip->type == OSPF_IT_UNDEF)
ifa->type = ospf_iface_clasify(ifa->iface);
@ -476,6 +494,44 @@ ospf_iface_new(struct proto_ospf *po, struct iface *iface,
olock_acquire(lock);
}
void
ospf_iface_change_mtu(struct proto_ospf *po, struct ospf_iface *ifa)
{
struct proto *p = &po->proto;
struct ospf_packet *op;
struct ospf_neighbor *n;
OSPF_TRACE(D_EVENTS, "Changing MTU on interface %s.", ifa->iface->name);
if (ifa->hello_sk)
{
ifa->hello_sk->rbsize = rxbufsize(ifa);
ifa->hello_sk->tbsize = ifa->iface->mtu;
sk_reallocate(ifa->hello_sk);
}
if (ifa->dr_sk)
{
ifa->dr_sk->rbsize = rxbufsize(ifa);
ifa->dr_sk->tbsize = ifa->iface->mtu;
sk_reallocate(ifa->dr_sk);
}
if (ifa->ip_sk)
{
ifa->ip_sk->rbsize = rxbufsize(ifa);
ifa->ip_sk->tbsize = ifa->iface->mtu;
sk_reallocate(ifa->ip_sk);
}
WALK_LIST(n, ifa->neigh_list)
{
op = (struct ospf_packet *) n->ldbdes;
n->ldbdes = mb_allocz(n->pool, ifa->iface->mtu);
if (ntohs(op->length) <= ifa->iface->mtu) /* If the packet in old buffer is bigger, let it filled by zeros */
memcpy(n->ldbdes, op, ifa->iface->mtu); /* If the packet is old is same or smaller, copy it */
rfree(op);
}
}
void
ospf_iface_notify(struct proto *p, unsigned flags, struct iface *iface)
{
@ -517,40 +573,7 @@ ospf_iface_notify(struct proto *p, unsigned flags, struct iface *iface)
if (flags & IF_CHANGE_MTU)
{
if ((ifa = ospf_iface_find((struct proto_ospf *) p, iface)) != NULL)
{
struct ospf_packet *op;
struct ospf_neighbor *n;
OSPF_TRACE(D_EVENTS, "Changing MTU on interface %s.", iface->name);
if (ifa->hello_sk)
{
ifa->hello_sk->rbsize = OSPF_MAX_PKT_SIZE;
ifa->hello_sk->tbsize = ifa->iface->mtu;
sk_reallocate(ifa->hello_sk);
}
if (ifa->dr_sk)
{
ifa->dr_sk->rbsize = OSPF_MAX_PKT_SIZE;
ifa->dr_sk->tbsize = ifa->iface->mtu;
sk_reallocate(ifa->dr_sk);
}
if (ifa->ip_sk)
{
ifa->ip_sk->rbsize = OSPF_MAX_PKT_SIZE;
ifa->ip_sk->tbsize = ifa->iface->mtu;
sk_reallocate(ifa->ip_sk);
}
WALK_LIST(n, ifa->neigh_list)
{
op = (struct ospf_packet *) n->ldbdes;
n->ldbdes = mb_allocz(n->pool, iface->mtu);
if (ntohs(op->length) <= iface->mtu) /* If the packet in old buffer is bigger, let it filled by zeros */
memcpy(n->ldbdes, op, iface->mtu); /* If the packet is old is same or smaller, copy it */
rfree(op);
}
}
ospf_iface_change_mtu(po, ifa);
}
}

6
proto/ospf/iface.h
View File

@ -1,7 +1,7 @@
/*
* BIRD -- OSPF
*
* (c) 1999 - 2004 Ondrej Filip <feela@network.cz>
* (c) 1999--2005 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*
@ -17,5 +17,9 @@ void ospf_iface_notify(struct proto *p, unsigned flags, struct iface *iface);
void ospf_iface_info(struct ospf_iface *ifa);
void ospf_iface_shutdown(struct ospf_iface *ifa);
void ospf_iface_new(struct proto_ospf *po, struct iface *iface, struct ospf_area_config *ac, struct ospf_iface_patt *ip);
void ospf_iface_change_mtu(struct proto_ospf *po, struct ospf_iface *ifa);
void ospf_set_rxbuf_size(struct ospf_iface *ifa, u32 rxbuf);
#endif /* _BIRD_OSPF_IFACE_H_ */

12
proto/ospf/ospf.c
View File

@ -637,7 +637,7 @@ ospf_reconfigure(struct proto *p, struct proto_config *c)
{
/* Now reconfigure interface */
if (!(newip = (struct ospf_iface_patt *)
iface_patt_match(&oldac->patt_list, ifa->iface)))
iface_patt_match(&newac->patt_list, ifa->iface)))
return 0;
/* HELLO TIMER */
@ -672,6 +672,16 @@ ospf_reconfigure(struct proto *p, struct proto_config *c)
schedule_rt_lsa(ifa->oa);
}
/* RX BUFF */
if (oldip->rxbuf != newip->rxbuf)
{
ifa->rxbuf = newip->rxbuf;
OSPF_TRACE(D_EVENTS,
"Changing rxbuf interface %s from %d to %d",
ifa->iface->name, oldip->rxbuf, newip->rxbuf);
ospf_iface_change_mtu(po, ifa);
}
/* strict nbma */
if ((oldip->strictnbma == 0) && (newip->strictnbma != 0))
{

15
proto/ospf/ospf.h
View File

@ -11,19 +11,13 @@
#define MAXNETS 10
#define OSPF_VLINK_MTU 576 /* RFC2328 - A.1 */
#undef OSPF_BIG_PACKETS /*
#define OSPF_MAX_PKT_SIZE 65536
/*
* RFC 2328 says, maximum packet size is 65535
* This could be too much for small systems, so I
* normally allocate 2*mtu - (I found one cisco
* sending packets mtu+16)
*/
#ifdef OSPF_BIG_PACKETS
#define OSPF_MAX_PKT_SIZE 65536
#else
#define OSPF_MAX_PKT_SIZE (ifa->iface->mtu * 2)
#endif
#ifdef LOCAL_DEBUG
#define OSPF_FORCE_DEBUG 1
#else
@ -206,6 +200,7 @@ struct ospf_iface
list nbma_list;
u8 priority; /* A router priority for DR election */
u8 ioprob;
u32 rxbuf;
};
struct ospf_md5
@ -572,6 +567,10 @@ struct ospf_iface_patt
#define OSPF_AUTH_SIMPLE 1
#define OSPF_AUTH_CRYPT 2
#define OSPF_AUTH_CRYPT_SIZE 16
u32 rxbuf;
#define OSPF_RXBUF_NORMAL 0
#define OSPF_RXBUF_LARGE 1
#define OSPF_RXBUF_MINSIZE 256 /* Minimal allowed size */
list *passwords;
list nbma_list;
};