d9d59bb1af
It will be needed for upcoming PMTU implementation in ipsec.
For now simply create/update an entry in tcp hostcache when needed.
The code is based on https://people.freebsd.org/~ae/ipsec_transport_mode_ctlinput.diff
Authored by: Kornel Duleba <mindal@semihalf.com>
Differential revision: https://reviews.freebsd.org/D30992
Reviewed by: tuxen
Sponsored by: Stormshield
Obtained from: Semihalf
151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/*-
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* Copyright (c) 2016 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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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipsec.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/priv.h>
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#include <sys/rmlock.h>
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#include <sys/socket.h>
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#include <sys/sockopt.h>
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#include <sys/syslog.h>
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#include <sys/proc.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <netipsec/ipsec.h>
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#include <netipsec/ipsec6.h>
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#include <netipsec/key.h>
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#include <netipsec/key_debug.h>
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#include <netipsec/ipsec_support.h>
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#ifdef INET
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static const struct ipsec_methods ipv4_methods = {
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.input = ipsec4_input,
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.forward = ipsec4_forward,
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.output = ipsec4_output,
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.pcbctl = ipsec4_pcbctl,
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.capability = ipsec4_capability,
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.check_policy = ipsec4_in_reject,
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.ctlinput = ipsec4_ctlinput,
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.hdrsize = ipsec_hdrsiz_inpcb,
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.udp_input = udp_ipsec_input,
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.udp_pcbctl = udp_ipsec_pcbctl,
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};
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#ifndef KLD_MODULE
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static const struct ipsec_support ipv4_ipsec = {
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.enabled = IPSEC_MODULE_ENABLED,
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.methods = &ipv4_methods
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};
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const struct ipsec_support * const ipv4_ipsec_support = &ipv4_ipsec;
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#endif /* !KLD_MODULE */
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#endif /* INET */
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#ifdef INET6
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static const struct ipsec_methods ipv6_methods = {
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.input = ipsec6_input,
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.forward = ipsec6_forward,
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.output = ipsec6_output,
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.pcbctl = ipsec6_pcbctl,
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.capability = ipsec6_capability,
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.check_policy = ipsec6_in_reject,
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.ctlinput = ipsec6_ctlinput,
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.hdrsize = ipsec_hdrsiz_inpcb,
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};
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#ifndef KLD_MODULE
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static const struct ipsec_support ipv6_ipsec = {
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.enabled = IPSEC_MODULE_ENABLED,
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.methods = &ipv6_methods
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};
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const struct ipsec_support * const ipv6_ipsec_support = &ipv6_ipsec;
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#endif /* !KLD_MODULE */
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#endif /* INET6 */
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/*
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* Always register ipsec module.
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* Even when IPsec is build in the kernel, we need to have
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* module registered. This will prevent to load ipsec.ko.
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*/
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static int
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ipsec_modevent(module_t mod, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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/* All xforms are registered via SYSINIT */
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if (!ipsec_initialized())
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return (ENOMEM);
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#ifdef KLD_MODULE
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#ifdef INET
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ipsec_support_enable(ipv4_ipsec_support, &ipv4_methods);
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#endif
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#ifdef INET6
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ipsec_support_enable(ipv6_ipsec_support, &ipv6_methods);
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#endif
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#endif /* KLD_MODULE */
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break;
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case MOD_UNLOAD:
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/* All xforms are unregistered via SYSUNINIT */
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#ifdef KLD_MODULE
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#ifdef INET
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ipsec_support_disable(ipv4_ipsec_support);
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#endif
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#ifdef INET6
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ipsec_support_disable(ipv6_ipsec_support);
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#endif
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#endif /* KLD_MODULE */
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break;
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default:
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return (EOPNOTSUPP);
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}
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return (0);
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}
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static moduledata_t ipsec_mod = {
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"ipsec",
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ipsec_modevent,
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0
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};
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DECLARE_MODULE(ipsec, ipsec_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
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MODULE_VERSION(ipsec, 1);
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#ifdef KLD_MODULE
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MODULE_DEPEND(ipsec, ipsec_support, 1, 1, 1);
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#endif
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