FreeBSD/Linux Kernel Cross Reference
sys/netipsec/ipsec_mod.c

     /*-
      * Copyright (c) 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 "opt_inet.h"
    #include "opt_inet6.h"
    #include "opt_ipsec.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/11.2/sys/netipsec/ipsec_mod.c 315514 2017-03-18 22:04:20Z ae $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/malloc.h>
    #include <sys/mbuf.h>
    #include <sys/module.h>
    #include <sys/priv.h>
    #include <sys/rmlock.h>
    #include <sys/socket.h>
    #include <sys/sockopt.h>
    #include <sys/syslog.h>
    #include <sys/proc.h>
    
    #include <netinet/in.h>
    #include <netinet/in_pcb.h>
    
    #include <netipsec/ipsec.h>
    #include <netipsec/ipsec6.h>
    #include <netipsec/key.h>
    #include <netipsec/key_debug.h>
    
    #include <netipsec/ipsec_support.h>
    
    #ifdef INET
    static const struct ipsec_methods ipv4_methods = {
            .input = ipsec4_input,
            .forward = ipsec4_forward,
            .output = ipsec4_output,
            .pcbctl = ipsec4_pcbctl,
            .capability = ipsec4_capability,
            .check_policy = ipsec4_in_reject,
            .hdrsize = ipsec_hdrsiz_inpcb,
            .udp_input = udp_ipsec_input,
            .udp_pcbctl = udp_ipsec_pcbctl,
    };
    #ifndef KLD_MODULE
    static const struct ipsec_support ipv4_ipsec = {
            .enabled = IPSEC_MODULE_ENABLED,
            .methods = &ipv4_methods
    };
    const struct ipsec_support * const ipv4_ipsec_support = &ipv4_ipsec;
    #endif /* !KLD_MODULE */
    #endif /* INET */
    
    #ifdef INET6
    static const struct ipsec_methods ipv6_methods = {
            .input = ipsec6_input,
            .forward = ipsec6_forward,
            .output = ipsec6_output,
            .pcbctl = ipsec6_pcbctl,
            .capability = ipsec6_capability,
            .check_policy = ipsec6_in_reject,
            .hdrsize = ipsec_hdrsiz_inpcb,
    };
    #ifndef KLD_MODULE
    static const struct ipsec_support ipv6_ipsec = {
            .enabled = IPSEC_MODULE_ENABLED,
            .methods = &ipv6_methods
    };
    const struct ipsec_support * const ipv6_ipsec_support = &ipv6_ipsec;
    #endif /* !KLD_MODULE */
    #endif /* INET6 */
    
    /*
     * Always register ipsec module.
    * Even when IPsec is build in the kernel, we need to have
    * module registered. This will prevent to load ipsec.ko.
    */
   static int
   ipsec_modevent(module_t mod, int type, void *data)
   {
   
           switch (type) {
           case MOD_LOAD:
                   /* All xforms are registered via SYSINIT */
                   if (!ipsec_initialized())
                           return (ENOMEM);
   #ifdef KLD_MODULE
   #ifdef INET
                   ipsec_support_enable(ipv4_ipsec_support, &ipv4_methods);
   #endif
   #ifdef INET6
                   ipsec_support_enable(ipv6_ipsec_support, &ipv6_methods);
   #endif
   #endif /* KLD_MODULE */
                   break;
           case MOD_UNLOAD:
                   /* All xforms are unregistered via SYSUNINIT */
   #ifdef KLD_MODULE
   #ifdef INET
                   ipsec_support_disable(ipv4_ipsec_support);
   #endif
   #ifdef INET6
                   ipsec_support_disable(ipv6_ipsec_support);
   #endif
   #endif /* KLD_MODULE */
                   break;
           default:
                   return (EOPNOTSUPP);
           }
           return (0);
   }
   
   static moduledata_t ipsec_mod = {
           "ipsec",
           ipsec_modevent,
           0
   };
   
   DECLARE_MODULE(ipsec, ipsec_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);
   MODULE_VERSION(ipsec, 1);
   #ifdef KLD_MODULE
   MODULE_DEPEND(ipsec, ipsec_support, 1, 1, 1);
   #endif

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