The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netpfil/pf/pfsync_nv.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2022 InnoGames GmbH
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include "opt_inet.h"
   33 #include "opt_inet6.h"
   34 
   35 #include <sys/param.h>
   36 #include <sys/errno.h>
   37 
   38 #include <netpfil/pf/pfsync_nv.h>
   39 
   40 int
   41 pfsync_syncpeer_nvlist_to_sockaddr(const nvlist_t *nvl,
   42     struct sockaddr_storage *sa)
   43 {
   44         int af;
   45 
   46         if (!nvlist_exists_number(nvl, "af"))
   47                 return (EINVAL);
   48         if (!nvlist_exists_binary(nvl, "address"))
   49                 return (EINVAL);
   50 
   51         af = nvlist_get_number(nvl, "af");
   52 
   53         switch (af) {
   54 #ifdef INET
   55         case AF_INET: {
   56                 struct sockaddr_in *in = (struct sockaddr_in *)sa;
   57                 size_t len;
   58                 const void *addr = nvlist_get_binary(nvl, "address", &len);
   59                 in->sin_family = af;
   60                 if (len != sizeof(*in))
   61                         return (EINVAL);
   62 
   63                 memcpy(in, addr, sizeof(*in));
   64                 break;
   65         }
   66 #endif
   67 #ifdef INET6
   68         case AF_INET6: {
   69                 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)sa;
   70                 size_t len;
   71                 const void *addr = nvlist_get_binary(nvl, "address", &len);
   72                 in6->sin6_family = af;
   73                 if (len != sizeof(*in6))
   74                         return (EINVAL);
   75 
   76                 memcpy(in6, addr, sizeof(*in6));
   77                 break;
   78         }
   79 #endif
   80         default:
   81                 return (EINVAL);
   82         }
   83 
   84         return (0);
   85 }
   86 
   87 nvlist_t *
   88 pfsync_sockaddr_to_syncpeer_nvlist(struct sockaddr_storage *sa)
   89 {
   90         nvlist_t *nvl;
   91 
   92         nvl = nvlist_create(0);
   93         if (nvl == NULL) {
   94                 return (nvl);
   95         }
   96 
   97         switch (sa->ss_family) {
   98 #ifdef INET
   99         case AF_INET: {
  100                 struct sockaddr_in *in = (struct sockaddr_in *)sa;
  101                 nvlist_add_number(nvl, "af", in->sin_family);
  102                 nvlist_add_binary(nvl, "address", in, sizeof(*in));
  103                 break;
  104         }
  105 #endif
  106 #ifdef INET6
  107         case AF_INET6: {
  108                 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)sa;
  109                 nvlist_add_number(nvl, "af", in6->sin6_family);
  110                 nvlist_add_binary(nvl, "address", in6, sizeof(*in6));
  111                 break;
  112         }
  113 #endif
  114         default:
  115                 return NULL;
  116         }
  117 
  118         return (nvl);
  119 }
  120 
  121 int
  122 pfsync_nvstatus_to_kstatus(const nvlist_t *nvl, struct pfsync_kstatus *status)
  123 {
  124         struct sockaddr_storage addr;
  125         int error;
  126 
  127         if (!nvlist_exists_number(nvl, "maxupdates"))
  128                 return (EINVAL);
  129         if (!nvlist_exists_number(nvl, "flags"))
  130                 return (EINVAL);
  131 
  132         status->maxupdates = nvlist_get_number(nvl, "maxupdates");
  133         status->flags = nvlist_get_number(nvl, "flags");
  134 
  135         if (nvlist_exists_string(nvl, "syncdev"))
  136                 strlcpy(status->syncdev, nvlist_get_string(nvl, "syncdev"),
  137                     IFNAMSIZ);
  138 
  139         if (nvlist_exists_nvlist(nvl, "syncpeer")) {
  140                 memset(&addr, 0, sizeof(addr));
  141                 if ((error = pfsync_syncpeer_nvlist_to_sockaddr(nvlist_get_nvlist(nvl, "syncpeer"), &addr)) != 0)
  142                         return (error);
  143 
  144                 status->syncpeer = addr;
  145         } else {
  146                 memset(&status->syncpeer, 0, sizeof(status->syncpeer));
  147         }
  148 
  149         return (0);
  150 }

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