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/netgraph/ng_nat.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright 2005, Gleb Smirnoff <glebius@FreeBSD.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/12.0/sys/netgraph/ng_nat.h 326272 2017-11-27 15:23:17Z pfg $
   29  */
   30 
   31 #define NG_NAT_NODE_TYPE    "nat"
   32 #define NGM_NAT_COOKIE      1107718711
   33 
   34 #define NG_NAT_HOOK_IN  "in"
   35 #define NG_NAT_HOOK_OUT "out"
   36 
   37 /* Arguments for NGM_NAT_SET_MODE message */
   38 struct ng_nat_mode {
   39         uint32_t        flags;
   40         uint32_t        mask;
   41 };
   42 
   43 /* Keep this in sync with the above structure definition */
   44 #define NG_NAT_MODE_INFO {                              \
   45           { "flags",    &ng_parse_uint32_type   },      \
   46           { "mask",     &ng_parse_uint32_type   },      \
   47           { NULL }                                      \
   48 }
   49 
   50 #define NG_NAT_LOG                      0x01
   51 #define NG_NAT_DENY_INCOMING            0x02
   52 #define NG_NAT_SAME_PORTS               0x04
   53 #define NG_NAT_UNREGISTERED_ONLY        0x10
   54 #define NG_NAT_RESET_ON_ADDR_CHANGE     0x20
   55 #define NG_NAT_PROXY_ONLY               0x40
   56 #define NG_NAT_REVERSE                  0x80
   57 
   58 #define NG_NAT_DESC_LENGTH      64
   59 #define NG_NAT_REDIRPROTO_ADDR  (IPPROTO_MAX + 3)       /* LibAlias' LINK_ADDR, also unused in in.h */
   60 
   61 /* Arguments for NGM_NAT_REDIRECT_PORT message */
   62 struct ng_nat_redirect_port {
   63         struct in_addr  local_addr;
   64         struct in_addr  alias_addr;
   65         struct in_addr  remote_addr;
   66         uint16_t        local_port;
   67         uint16_t        alias_port;
   68         uint16_t        remote_port;
   69         uint8_t         proto;
   70         char            description[NG_NAT_DESC_LENGTH];
   71 };
   72 
   73 /* Keep this in sync with the above structure definition */
   74 #define NG_NAT_REDIRECT_PORT_TYPE_INFO(desctype) {              \
   75           { "local_addr",       &ng_parse_ipaddr_type   },      \
   76           { "alias_addr",       &ng_parse_ipaddr_type   },      \
   77           { "remote_addr",      &ng_parse_ipaddr_type   },      \
   78           { "local_port",       &ng_parse_uint16_type   },      \
   79           { "alias_port",       &ng_parse_uint16_type   },      \
   80           { "remote_port",      &ng_parse_uint16_type   },      \
   81           { "proto",            &ng_parse_uint8_type    },      \
   82           { "description",      (desctype)              },      \
   83           { NULL }                                              \
   84 }
   85 
   86 /* Arguments for NGM_NAT_REDIRECT_ADDR message */
   87 struct ng_nat_redirect_addr {
   88         struct in_addr  local_addr;
   89         struct in_addr  alias_addr;
   90         char            description[NG_NAT_DESC_LENGTH];
   91 };
   92 
   93 /* Keep this in sync with the above structure definition */
   94 #define NG_NAT_REDIRECT_ADDR_TYPE_INFO(desctype) {              \
   95           { "local_addr",       &ng_parse_ipaddr_type   },      \
   96           { "alias_addr",       &ng_parse_ipaddr_type   },      \
   97           { "description",      (desctype)              },      \
   98           { NULL }                                              \
   99 }
  100 
  101 /* Arguments for NGM_NAT_REDIRECT_PROTO message */
  102 struct ng_nat_redirect_proto {
  103         struct in_addr  local_addr;
  104         struct in_addr  alias_addr;
  105         struct in_addr  remote_addr;
  106         uint8_t         proto;
  107         char            description[NG_NAT_DESC_LENGTH];
  108 };
  109 
  110 /* Keep this in sync with the above structure definition */
  111 #define NG_NAT_REDIRECT_PROTO_TYPE_INFO(desctype) {             \
  112           { "local_addr",       &ng_parse_ipaddr_type   },      \
  113           { "alias_addr",       &ng_parse_ipaddr_type   },      \
  114           { "remote_addr",      &ng_parse_ipaddr_type   },      \
  115           { "proto",            &ng_parse_uint8_type    },      \
  116           { "description",      (desctype)              },      \
  117           { NULL }                                              \
  118 }
  119 
  120 /* Arguments for NGM_NAT_ADD_SERVER message */
  121 struct ng_nat_add_server {
  122         uint32_t        id;
  123         struct in_addr  addr;
  124         uint16_t        port;
  125 };
  126 
  127 /* Keep this in sync with the above structure definition */
  128 #define NG_NAT_ADD_SERVER_TYPE_INFO {                           \
  129           { "id",               &ng_parse_uint32_type   },      \
  130           { "addr",             &ng_parse_ipaddr_type   },      \
  131           { "port",             &ng_parse_uint16_type   },      \
  132           { NULL }                                              \
  133 }
  134 
  135 /* List entry of array returned in NGM_NAT_LIST_REDIRECTS message */
  136 struct ng_nat_listrdrs_entry {
  137         uint32_t        id;             /* Anything except zero */
  138         struct in_addr  local_addr;
  139         struct in_addr  alias_addr;
  140         struct in_addr  remote_addr;
  141         uint16_t        local_port;
  142         uint16_t        alias_port;
  143         uint16_t        remote_port;
  144         uint16_t        proto;          /* Valid proto or NG_NAT_REDIRPROTO_ADDR */
  145         uint16_t        lsnat;          /* LSNAT servers count */
  146         char            description[NG_NAT_DESC_LENGTH];
  147 };
  148 
  149 /* Keep this in sync with the above structure definition */
  150 #define NG_NAT_LISTRDRS_ENTRY_TYPE_INFO(desctype) {                     \
  151           { "id",               &ng_parse_uint32_type   },      \
  152           { "local_addr",       &ng_parse_ipaddr_type   },      \
  153           { "alias_addr",       &ng_parse_ipaddr_type   },      \
  154           { "remote_addr",      &ng_parse_ipaddr_type   },      \
  155           { "local_port",       &ng_parse_uint16_type   },      \
  156           { "alias_port",       &ng_parse_uint16_type   },      \
  157           { "remote_port",      &ng_parse_uint16_type   },      \
  158           { "proto",            &ng_parse_uint16_type   },      \
  159           { "lsnat",            &ng_parse_uint16_type   },      \
  160           { "description",      (desctype)              },      \
  161           { NULL }                                              \
  162 }
  163 
  164 /* Structure returned by NGM_NAT_LIST_REDIRECTS */
  165 struct ng_nat_list_redirects {
  166         uint32_t                total_count;
  167         struct ng_nat_listrdrs_entry redirects[];
  168 };
  169 
  170 /* Keep this in sync with the above structure definition */
  171 #define NG_NAT_LIST_REDIRECTS_TYPE_INFO(redirtype) {            \
  172           { "total_count",      &ng_parse_uint32_type   },      \
  173           { "redirects",        (redirtype)             },      \
  174           { NULL }                                              \
  175 }
  176 
  177 /* Structure returned by NGM_NAT_LIBALIAS_INFO */
  178 struct ng_nat_libalias_info {
  179         uint32_t        icmpLinkCount;
  180         uint32_t        udpLinkCount;
  181         uint32_t        tcpLinkCount;
  182         uint32_t        sctpLinkCount;
  183         uint32_t        pptpLinkCount;
  184         uint32_t        protoLinkCount;
  185         uint32_t        fragmentIdLinkCount;
  186         uint32_t        fragmentPtrLinkCount;
  187         uint32_t        sockCount;
  188 };
  189 
  190 /* Keep this in sync with the above structure definition */
  191 #define NG_NAT_LIBALIAS_INFO {                                  \
  192           { "icmpLinkCount",    &ng_parse_uint32_type   },      \
  193           { "udpLinkCount",     &ng_parse_uint32_type   },      \
  194           { "tcpLinkCount",     &ng_parse_uint32_type   },      \
  195           { "sctpLinkCount",    &ng_parse_uint32_type   },      \
  196           { "pptpLinkCount",    &ng_parse_uint32_type   },      \
  197           { "protoLinkCount",   &ng_parse_uint32_type   },      \
  198           { "fragmentIdLinkCount", &ng_parse_uint32_type },     \
  199           { "fragmentPtrLinkCount", &ng_parse_uint32_type },    \
  200           { "sockCount",        &ng_parse_uint32_type   },      \
  201           { NULL }                                              \
  202 }
  203 
  204 enum {
  205         NGM_NAT_SET_IPADDR = 1,
  206         NGM_NAT_SET_MODE,
  207         NGM_NAT_SET_TARGET,
  208         NGM_NAT_REDIRECT_PORT,
  209         NGM_NAT_REDIRECT_ADDR,
  210         NGM_NAT_REDIRECT_PROTO,
  211         NGM_NAT_REDIRECT_DYNAMIC,
  212         NGM_NAT_REDIRECT_DELETE,
  213         NGM_NAT_ADD_SERVER,
  214         NGM_NAT_LIST_REDIRECTS,
  215         NGM_NAT_PROXY_RULE,
  216         NGM_NAT_LIBALIAS_INFO,
  217 };

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