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- update ro_pmtu on IPsec tunnel encapsulation. ro != ro_pmtu is used as the 

sign for the existence of routing header.
- fragment to 1280 on IPv6-over-IPv6 encapsulation, as ICMPv6 too big may not
  give you enough information to update pmtu cache.

from iij seil team, via kame.
This commit is contained in:
itojun 2004-07-14 03:06:08 +00:00
parent 5555edc8c1
commit 8da378abea
1 changed files with 7 additions and 3 deletions
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10
sys/netinet6/ip6_output.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ip6_output.c,v 1.84 2004/07/06 04:30:29 minoura Exp $ */
/* $NetBSD: ip6_output.c,v 1.85 2004/07/14 03:06:08 itojun Exp $ */
/* $KAME: ip6_output.c,v 1.172 2001/03/25 09:55:56 itojun Exp $ */
/*
@ -62,7 +62,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ip6_output.c,v 1.84 2004/07/06 04:30:29 minoura Exp $");
__KERNEL_RCSID(0, "$NetBSD: ip6_output.c,v 1.85 2004/07/14 03:06:08 itojun Exp $");
#include "opt_inet.h"
#include "opt_ipsec.h"
@ -505,7 +505,7 @@ skip_ipsec2:;
error = ipsec6_output_tunnel(&state, sp, flags);
m = state.m;
ro = (struct route_in6 *)state.ro;
ro_pmtu = ro = (struct route_in6 *)state.ro;
dst = (struct sockaddr_in6 *)state.dst;
if (error) {
/* mbuf is already reclaimed in ipsec6_output_tunnel. */
@ -721,6 +721,10 @@ skip_ipsec2:;
if ((error = ip6_getpmtu(ro_pmtu, ro, ifp, &finaldst, &mtu,
&alwaysfrag)) != 0)
goto bad;
#ifdef IPSEC
if (needipsectun)
mtu = IPV6_MMTU;
#endif
/*
* The caller of this function may specify to use the minimum MTU