Commit e6ea2e37 authored by Ondřej Filip's avatar Ondřej Filip

Maximal packet size in virtual links is 576.

parent e300066d
......@@ -10,6 +10,7 @@
#define _BIRD_OSPF_H_
#define MAXNETS 10
#define OSPF_VLINK_MTU 576 /* RFC2328 - A.1 */
#undef OSPF_BIG_PACKETS /*
* RFC 2328 says, maximum packet size is 65535
* This could be too much for small systems, so I
......
/*
* 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.
*/
......@@ -31,8 +31,11 @@ ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
unsigned
ospf_pkt_maxsize(struct ospf_iface *ifa)
{
return ifa->iface->mtu - SIZE_OF_IP_HEADER -
((ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0);
unsigned mtu = (ifa->type == OSPF_IT_VLINK) ? OSPF_VLINK_MTU : ifa->iface->mtu;
/* Can be mtu < 576? */
return ((mtu <= ifa->iface->mtu) ? mtu : ifa->iface->mtu) -
SIZE_OF_IP_HEADER - ((ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0);
/* For virtual links use mtu=576 */
}
void
......
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