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look at rmx_mtu on IPsec tunnel MTU computation.

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From: David Waitzman <djw@bbn.com>
This commit is contained in:
itojun 2002-06-07 13:43:47 +00:00
parent bcae776bf0
commit 14df31ceb3
1 changed files with 4 additions and 2 deletions
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6
sys/netinet/ip_input.c
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@ -1,4 +1,4 @@
/* $NetBSD: ip_input.c,v 1.150 2002/05/12 20:33:50 matt Exp $ */
/* $NetBSD: ip_input.c,v 1.151 2002/06/07 13:43:47 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@ -102,7 +102,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ip_input.c,v 1.150 2002/05/12 20:33:50 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: ip_input.c,v 1.151 2002/06/07 13:43:47 itojun Exp $");
#include "opt_gateway.h"
#include "opt_pfil_hooks.h"
@ -1662,6 +1662,8 @@ ip_forward(m, srcrt)
ro = &sp->req->sav->sah->sa_route;
if (ro->ro_rt && ro->ro_rt->rt_ifp) {
dummyifp.if_mtu =
ro->ro_rt->rt_rmx.rmx_mtu ?
ro->ro_rt->rt_rmx.rmx_mtu :
ro->ro_rt->rt_ifp->if_mtu;
dummyifp.if_mtu -= ipsechdr;
destifp = &dummyifp;