aa2715612c
to switch the output method in run-time. Also document some sysctl variables that can by changed for NAT64 module. NAT64 had compile time option IPFIREWALL_NAT64_DIRECT_OUTPUT to use if_output directly from nat64 module. By default is used netisr based output method. Now both methods can be used, but they require different handling by rules. Obtained from: Yandex LLC MFC after: 3 weeks Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D16647
148 lines
4.3 KiB
C
148 lines
4.3 KiB
C
/*-
|
|
* Copyright (c) 2015-2018 Yandex LLC
|
|
* Copyright (c) 2015-2018 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 "ip_fw_nat64.h"
|
|
#include "nat64_translate.h"
|
|
|
|
VNET_DEFINE(int, nat64_debug) = 0;
|
|
VNET_DEFINE(int, nat64_allow_private) = 0;
|
|
|
|
SYSCTL_DECL(_net_inet_ip_fw);
|
|
SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, nat64_debug, CTLFLAG_VNET | CTLFLAG_RW,
|
|
&VNET_NAME(nat64_debug), 0, "Debug level for NAT64 module");
|
|
SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, nat64_allow_private,
|
|
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nat64_allow_private), 0,
|
|
"Allow use of non-global IPv4 addresses with NAT64");
|
|
|
|
static int
|
|
sysctl_direct_output(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
uint32_t value;
|
|
int error;
|
|
|
|
value = nat64_get_output_method();
|
|
error = sysctl_handle_32(oidp, &value, 0, req);
|
|
/* Read operation or some error */
|
|
if ((error != 0) || (req->newptr == NULL))
|
|
return (error);
|
|
nat64_set_output_method(value);
|
|
return (0);
|
|
}
|
|
SYSCTL_PROC(_net_inet_ip_fw, OID_AUTO, nat64_direct_output,
|
|
CTLFLAG_VNET | CTLTYPE_U32 | CTLFLAG_RW, 0, 0, sysctl_direct_output, "IU",
|
|
"Use if_output directly instead of deffered netisr-based processing");
|
|
|
|
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);
|