Differential D6434 Diff 16523 sys/netpfil/ipfw/nat64/ip_fw_nat64.c

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sys/netpfil/ipfw/nat64/ip_fw_nat64.c

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				/*-
				* Copyright (c) 2015-2016 Yandex LLC
				* Copyright (c) 2015-2016 Andrey V. Elsukov <ae@FreeBSD.org>
				* All rights reserved.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				*
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
				* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
				* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
				* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
				* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
				* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
				* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
				* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
				* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
				* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/param.h>
				#include <sys/systm.h>
				#include <sys/kernel.h>
				#include <sys/lock.h>
				#include <sys/malloc.h>
				#include <sys/module.h>
				#include <sys/rwlock.h>
				#include <sys/socket.h>
				#include <sys/sysctl.h>

				#include <net/if.h>
				#include <net/vnet.h>

				#include <netinet/in.h>
				#include <netinet/ip_var.h>
				#include <netinet/ip_fw.h>

				#include <netpfil/ipfw/ip_fw_private.h>
				#include <netpfil/ipfw/nat64/ip_fw_nat64.h>
				#include <netpfil/ipfw/nat64/nat64_translate.h>


				int nat64_debug = 0;
				SYSCTL_DECL(_net_inet_ip_fw);
				SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, nat64_debug, CTLFLAG_RW,
				&nat64_debug, 0, "Debug level for NAT64 module");

				static int
				vnet_ipfw_nat64_init(const void *arg __unused)
				{
				struct ip_fw_chain *ch;
				int first, error;

				ch = &V_layer3_chain;
				first = IS_DEFAULT_VNET(curvnet) ? 1: 0;
				error = nat64stl_init(ch, first);
				if (error != 0)
				return (error);
				error = nat64lsn_init(ch, first);
				if (error != 0) {
				nat64stl_uninit(ch, first);
				return (error);
				}
				return (0);
				}

				static int
				vnet_ipfw_nat64_uninit(const void *arg __unused)
				{
				struct ip_fw_chain *ch;
				int last;

				ch = &V_layer3_chain;
				last = IS_DEFAULT_VNET(curvnet) ? 1: 0;
				nat64stl_uninit(ch, last);
				nat64lsn_uninit(ch, last);
				return (0);
				}

				static int
				ipfw_nat64_modevent(module_t mod, int type, void *unused)
				{

				switch (type) {
				case MOD_LOAD:
				case MOD_UNLOAD:
				break;
				default:
				return (EOPNOTSUPP);
				}
				return (0);
				}

				static moduledata_t ipfw_nat64_mod = {
				"ipfw_nat64",
				ipfw_nat64_modevent,
				0
				};

				/* Define startup order. */
				#define IPFW_NAT64_SI_SUB_FIREWALL SI_SUB_PROTO_IFATTACHDOMAIN
				#define IPFW_NAT64_MODEVENT_ORDER (SI_ORDER_ANY - 128) /* after ipfw */
				#define IPFW_NAT64_MODULE_ORDER (IPFW_NAT64_MODEVENT_ORDER + 1)
				#define IPFW_NAT64_VNET_ORDER (IPFW_NAT64_MODEVENT_ORDER + 2)

				DECLARE_MODULE(ipfw_nat64, ipfw_nat64_mod, IPFW_NAT64_SI_SUB_FIREWALL,
				SI_ORDER_ANY);
				MODULE_DEPEND(ipfw_nat64, ipfw, 3, 3, 3);
				MODULE_VERSION(ipfw_nat64, 1);

				VNET_SYSINIT(vnet_ipfw_nat64_init, IPFW_NAT64_SI_SUB_FIREWALL,
				IPFW_NAT64_VNET_ORDER, vnet_ipfw_nat64_init, NULL);
				VNET_SYSUNINIT(vnet_ipfw_nat64_uninit, IPFW_NAT64_SI_SUB_FIREWALL,
				IPFW_NAT64_VNET_ORDER, vnet_ipfw_nat64_uninit, NULL);