FreeBSD/Linux Kernel Cross Reference
sys/netpfil/ipfw/nat64/ip_fw_nat64.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2015-2019 Yandex LLC
      * Copyright (c) 2015-2019 Andrey V. Elsukov <ae@FreeBSD.org>
      *
      * 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;
    
    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");
    
    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 | CTLFLAG_NEEDGIANT,
        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;
            /* Initialize V_nat64out methods explicitly. */
            nat64_set_output_method(0);
            error = nat64stl_init(ch, first);
            if (error != 0)
                    return (error);
            error = nat64clat_init(ch, first);
            if (error != 0) {
                    nat64stl_uninit(ch, first);
                    return (error);
            }
            error = nat64lsn_init(ch, first);
            if (error != 0) {
                    nat64stl_uninit(ch, first);
                   nat64clat_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);
           nat64clat_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);

Cache object: 8a67313cdcbd6e7d8bbf39fb55182061