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80044c785c
This patch provides UDP encapsulation of ESP packets over IPv6. Ports the IPv4 code to IPv6 and adds support for IPv6 in udpencap.c As required by the RFC and unlike in IPv4 encapsulation, UDP checksums are calculated. Co-authored-by: Aurelien Cazuc <aurelien.cazuc.external@stormshield.eu> Sponsored-by: Stormshield Sponsored-by: Wiktel Sponsored-by: Klara, Inc.
150 lines
4.1 KiB
C
150 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/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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.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 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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