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b835b6fe2b
ICMP unreach, frag needed. Up to now we only looked at the interface MTU. Make sure to only use the minimum of the two. In case IPSEC is compiled in, loop the mtu through ip_ipsec_mtu() to avoid any further conditional maths. Without this, PMTU was broken in those cases when there was a route with a lower MTU than the MTU of the outgoing interface. PR: kern/122338 Tested by: Mark Cammidge mark peralex.com Reviewed by: silence on net@ MFC after: 2 weeks
43 lines
2.0 KiB
C
43 lines
2.0 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET_IP_IPSEC_H_
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#define _NETINET_IP_IPSEC_H_
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int ip_ipsec_filtertunnel(struct mbuf *);
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int ip_ipsec_fwd(struct mbuf *);
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int ip_ipsec_input(struct mbuf *);
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int ip_ipsec_mtu(struct mbuf *, int);
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int ip_ipsec_output(struct mbuf **, struct inpcb *, int *, int *,
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struct route **, struct route *, struct sockaddr_in **,
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struct in_ifaddr **, struct ifnet **);
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#endif
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