2005-01-10 Greg Troxel <gdt@fnord.ir.bbn.com>
* ospf_packet.h: Remove commented out definition of
OSPF_MAX_PACKET; neither it or the uncommented one are used any more.
* ospf_packet.c (ospf_make_ls_upd): Leave room for authentication
when deciding if an update will fit.
(ospf_packet_authspace): Factor out calculation of size required
for authentication.
(ospf_make_db_desc): Use ospf_max_packet, not OSPF_MAX_PACKET.
Don't confuse readers that there is a macro.
diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index 6eb6651..f636e2b 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -241,16 +241,25 @@
return new;
}
+/* XXX inline */
+unsigned int
+ospf_packet_authspace (struct ospf_interface *oi)
+{
+ int auth = 0;
+
+ if ( ospf_auth_type (oi) == OSPF_AUTH_CRYPTOGRAPHIC)
+ auth = OSPF_AUTH_MD5_SIZE;
+
+ return auth;
+}
+
unsigned int
ospf_packet_max (struct ospf_interface *oi)
{
int max;
- if ( ospf_auth_type (oi) == OSPF_AUTH_CRYPTOGRAPHIC)
- max = oi->ifp->mtu - OSPF_AUTH_MD5_SIZE;
- else
- max = oi->ifp->mtu;
-
+ max = oi->ifp->mtu - ospf_packet_authspace(oi);
+
max -= (OSPF_HEADER_SIZE + sizeof (struct ip));
return max;
@@ -1410,8 +1419,8 @@
return;
}
- /* Packet overflows MTU size, send immediatly. */
- if (length + ntohs (find->data->length) > OSPF_PACKET_MAX (oi))
+ /* Packet overflows MTU size, send immediately. */
+ if (length + ntohs (find->data->length) > ospf_packet_max (oi))
{
if (oi->type == OSPF_IFTYPE_NBMA)
ospf_ls_upd_send (nbr, ls_upd, OSPF_SEND_PACKET_DIRECT);
@@ -2735,7 +2744,7 @@
u_int16_t ls_age;
/* DD packet overflows interface MTU. */
- if (length + OSPF_LSA_HEADER_SIZE > OSPF_PACKET_MAX (oi))
+ if (length + OSPF_LSA_HEADER_SIZE > ospf_packet_max (oi))
break;
/* Keep pointer to LS age. */
@@ -2770,7 +2779,7 @@
oi = nbr->oi;
/* LS Request packet overflows interface MTU. */
- if (*length + delta > OSPF_PACKET_MAX(oi))
+ if (*length + delta > ospf_packet_max(oi))
return 0;
stream_putl (s, lsa->data->type);
@@ -2827,6 +2836,7 @@
struct ospf_lsa *lsa;
struct listnode *node;
u_int16_t length = OSPF_LS_UPD_MIN_SIZE;
+ unsigned int size_noauth;
unsigned long delta = stream_get_putp (s);
unsigned long pp;
int count = 0;
@@ -2837,6 +2847,9 @@
pp = stream_get_putp (s);
ospf_output_forward (s, OSPF_LS_UPD_MIN_SIZE);
+ /* Calculate amount of packet usable for data. */
+ size_noauth = stream_get_size(s) - ospf_packet_authspace(oi);
+
while ((node = listhead (update)) != NULL)
{
struct lsa_header *lsah;
@@ -2850,7 +2863,7 @@
assert (lsa->data);
/* Will it fit? */
- if (length + delta + ntohs (lsa->data->length) > stream_get_size (s))
+ if (length + delta + ntohs (lsa->data->length) > size_noauth)
break;
/* Keep pointer to LS age. */
@@ -2899,7 +2912,7 @@
lsa = getdata (node);
assert (lsa);
- if (length + delta > OSPF_PACKET_MAX (oi))
+ if (length + delta > ospf_packet_max (oi))
break;
stream_put (s, lsa->data, OSPF_LSA_HEADER_SIZE);
@@ -3264,6 +3277,7 @@
else
size = oi->ifp->mtu;
+ /* XXX Should this be - sizeof(struct ip)?? -gdt */
if (size > OSPF_MAX_PACKET_SIZE)
{
zlog_warn ("ospf_ls_upd_packet_new: oversized LSA id:%s too big,"