09f5d08690
appearing and disappearing on the host system. Such handling is need, because tunneling interfaces must use addresses, that are configured on the host as ingress addresses for tunnels. Otherwise the system can send spoofed packets with source address, that belongs to foreign host. The KPI uses ifaddr_event_ext event to implement addresses tracking. Tunneling interfaces register event handlers and then they are notified by the kernel, when an address disappears or appears. ifaddr_event_compat() handler from if.c replaced by srcaddr_change_event() in the ip_encap.c MFC after: 1 month Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D17134
83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/* $FreeBSD$ */
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/* $KAME: ip_encap.h,v 1.7 2000/03/25 07:23:37 sumikawa Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
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* 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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* 3. Neither the name of the project 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 PROJECT 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 PROJECT 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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#ifndef _NETINET_IP_ENCAP_H_
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#define _NETINET_IP_ENCAP_H_
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#ifdef _KERNEL
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int encap4_input(struct mbuf **, int *, int);
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int encap6_input(struct mbuf **, int *, int);
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typedef int (*encap_lookup_t)(const struct mbuf *, int, int, void **);
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typedef int (*encap_check_t)(const struct mbuf *, int, int, void *);
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typedef int (*encap_input_t)(struct mbuf *, int, int, void *);
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typedef void (*encap_srcaddr_t)(void *, const struct sockaddr *, int);
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struct encap_config {
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int proto; /* protocol */
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int min_length; /* minimum packet length */
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int max_hdrsize; /* maximum header size */
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int exact_match; /* a packet is exactly matched */
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#define ENCAP_DRV_LOOKUP 0x7fffffff
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encap_lookup_t lookup;
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encap_check_t check;
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encap_input_t input;
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void *pad[3];
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};
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struct encaptab;
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struct srcaddrtab;
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const struct encaptab *ip_encap_attach(const struct encap_config *,
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void *arg, int mflags);
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const struct encaptab *ip6_encap_attach(const struct encap_config *,
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void *arg, int mflags);
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const struct srcaddrtab *ip_encap_register_srcaddr(encap_srcaddr_t,
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void *arg, int mflags);
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const struct srcaddrtab *ip6_encap_register_srcaddr(encap_srcaddr_t,
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void *arg, int mflags);
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int ip_encap_unregister_srcaddr(const struct srcaddrtab *);
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int ip6_encap_unregister_srcaddr(const struct srcaddrtab *);
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int ip_encap_detach(const struct encaptab *);
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int ip6_encap_detach(const struct encaptab *);
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#endif
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#endif /*_NETINET_IP_ENCAP_H_*/
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