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  * Copyright 2005, Gleb Smirnoff <glebius@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #define NG_NAT_NODE_TYPE    "nat"
   30 #define NGM_NAT_COOKIE      1107718711
   31 
   32 #define NG_NAT_HOOK_IN  "in"
   33 #define NG_NAT_HOOK_OUT "out"
   34 
   35 /* Arguments for NGM_NAT_SET_MODE message */
   36 struct ng_nat_mode {
   37         uint32_t        flags;
   38         uint32_t        mask;
   39 };
   40 
   41 /* Keep this in sync with the above structure definition */
   42 #define NG_NAT_MODE_INFO {                              \
   43           { "flags",    &ng_parse_uint32_type   },      \
   44           { "mask",     &ng_parse_uint32_type   },      \
   45           { NULL }                                      \
   46 }
   47 
   48 #define NG_NAT_LOG                      0x01
   49 #define NG_NAT_DENY_INCOMING            0x02
   50 #define NG_NAT_SAME_PORTS               0x04
   51 #define NG_NAT_UNREGISTERED_ONLY        0x10
   52 #define NG_NAT_RESET_ON_ADDR_CHANGE     0x20
   53 #define NG_NAT_PROXY_ONLY               0x40
   54 #define NG_NAT_REVERSE                  0x80
   55 #define NG_NAT_UNREGISTERED_CGN         0x100
   56 
   57 #define NG_NAT_DESC_LENGTH      64
   58 #define NG_NAT_REDIRPROTO_ADDR  (IPPROTO_MAX + 3)       /* LibAlias' LINK_ADDR, also unused in in.h */
   59 
   60 /* Arguments for NGM_NAT_REDIRECT_PORT message */
   61 struct ng_nat_redirect_port {
   62         struct in_addr  local_addr;
   63         struct in_addr  alias_addr;
   64         struct in_addr  remote_addr;
   65         uint16_t        local_port;
   66         uint16_t        alias_port;
   67         uint16_t        remote_port;
   68         uint8_t         proto;
   69         char            description[NG_NAT_DESC_LENGTH];
   70 };
   71 
   72 /* Keep this in sync with the above structure definition */
   73 #define NG_NAT_REDIRECT_PORT_TYPE_INFO(desctype) {              \
   74           { "local_addr",       &ng_parse_ipaddr_type   },      \
   75           { "alias_addr",       &ng_parse_ipaddr_type   },      \
   76           { "remote_addr",      &ng_parse_ipaddr_type   },      \
   77           { "local_port",       &ng_parse_uint16_type   },      \
   78           { "alias_port",       &ng_parse_uint16_type   },      \
   79           { "remote_port",      &ng_parse_uint16_type   },      \
   80           { "proto",            &ng_parse_uint8_type    },      \
   81           { "description",      (desctype)              },      \
   82           { NULL }                                              \
   83 }
   84 
   85 /* Arguments for NGM_NAT_REDIRECT_ADDR message */
   86 struct ng_nat_redirect_addr {
   87         struct in_addr  local_addr;
   88         struct in_addr  alias_addr;
   89         char            description[NG_NAT_DESC_LENGTH];
   90 };
   91 
   92 /* Keep this in sync with the above structure definition */
   93 #define NG_NAT_REDIRECT_ADDR_TYPE_INFO(desctype) {              \
   94           { "local_addr",       &ng_parse_ipaddr_type   },      \
   95           { "alias_addr",       &ng_parse_ipaddr_type   },      \
   96           { "description",      (desctype)              },      \
   97           { NULL }                                              \
   98 }
   99 
  100 /* Arguments for NGM_NAT_REDIRECT_PROTO message */
  101 struct ng_nat_redirect_proto {
  102         struct in_addr  local_addr;
  103         struct in_addr  alias_addr;
  104         struct in_addr  remote_addr;
  105         uint8_t         proto;
  106         char            description[NG_NAT_DESC_LENGTH];
  107 };
  108 
  109 /* Keep this in sync with the above structure definition */
  110 #define NG_NAT_REDIRECT_PROTO_TYPE_INFO(desctype) {             \
  111           { "local_addr",       &ng_parse_ipaddr_type   },      \
  112           { "alias_addr",       &ng_parse_ipaddr_type   },      \
  113           { "remote_addr",      &ng_parse_ipaddr_type   },      \
  114           { "proto",            &ng_parse_uint8_type    },      \
  115           { "description",      (desctype)              },      \
  116           { NULL }                                              \
  117 }
  118 
  119 /* Arguments for NGM_NAT_ADD_SERVER message */
  120 struct ng_nat_add_server {
  121         uint32_t        id;
  122         struct in_addr  addr;
  123         uint16_t        port;
  124 };
  125 
  126 /* Keep this in sync with the above structure definition */
  127 #define NG_NAT_ADD_SERVER_TYPE_INFO {                           \
  128           { "id",               &ng_parse_uint32_type   },      \
  129           { "addr",             &ng_parse_ipaddr_type   },      \
  130           { "port",             &ng_parse_uint16_type   },      \
  131           { NULL }                                              \
  132 }
  133 
  134 /* List entry of array returned in NGM_NAT_LIST_REDIRECTS message */
  135 struct ng_nat_listrdrs_entry {
  136         uint32_t        id;             /* Anything except zero */
  137         struct in_addr  local_addr;
  138         struct in_addr  alias_addr;
  139         struct in_addr  remote_addr;
  140         uint16_t        local_port;
  141         uint16_t        alias_port;
  142         uint16_t        remote_port;
  143         uint16_t        proto;          /* Valid proto or NG_NAT_REDIRPROTO_ADDR */
  144         uint16_t        lsnat;          /* LSNAT servers count */
  145         char            description[NG_NAT_DESC_LENGTH];
  146 };
  147 
  148 /* Keep this in sync with the above structure definition */
  149 #define NG_NAT_LISTRDRS_ENTRY_TYPE_INFO(desctype) {                     \
  150           { "id",               &ng_parse_uint32_type   },      \
  151           { "local_addr",       &ng_parse_ipaddr_type   },      \
  152           { "alias_addr",       &ng_parse_ipaddr_type   },      \
  153           { "remote_addr",      &ng_parse_ipaddr_type   },      \
  154           { "local_port",       &ng_parse_uint16_type   },      \
  155           { "alias_port",       &ng_parse_uint16_type   },      \
  156           { "remote_port",      &ng_parse_uint16_type   },      \
  157           { "proto",            &ng_parse_uint16_type   },      \
  158           { "lsnat",            &ng_parse_uint16_type   },      \
  159           { "description",      (desctype)              },      \
  160           { NULL }                                              \
  161 }
  162 
  163 /* Structure returned by NGM_NAT_LIST_REDIRECTS */
  164 struct ng_nat_list_redirects {
  165         uint32_t                total_count;
  166         struct ng_nat_listrdrs_entry redirects[];
  167 };
  168 
  169 /* Keep this in sync with the above structure definition */
  170 #define NG_NAT_LIST_REDIRECTS_TYPE_INFO(redirtype) {            \
  171           { "total_count",      &ng_parse_uint32_type   },      \
  172           { "redirects",        (redirtype)             },      \
  173           { NULL }                                              \
  174 }
  175 
  176 /* Structure returned by NGM_NAT_LIBALIAS_INFO */
  177 struct ng_nat_libalias_info {
  178         uint32_t        icmpLinkCount;
  179         uint32_t        udpLinkCount;
  180         uint32_t        tcpLinkCount;
  181         uint32_t        sctpLinkCount;
  182         uint32_t        pptpLinkCount;
  183         uint32_t        protoLinkCount;
  184         uint32_t        fragmentIdLinkCount;
  185         uint32_t        fragmentPtrLinkCount;
  186         uint32_t        sockCount;
  187 };
  188 
  189 /* Keep this in sync with the above structure definition */
  190 #define NG_NAT_LIBALIAS_INFO {                                  \
  191           { "icmpLinkCount",    &ng_parse_uint32_type   },      \
  192           { "udpLinkCount",     &ng_parse_uint32_type   },      \
  193           { "tcpLinkCount",     &ng_parse_uint32_type   },      \
  194           { "sctpLinkCount",    &ng_parse_uint32_type   },      \
  195           { "pptpLinkCount",    &ng_parse_uint32_type   },      \
  196           { "protoLinkCount",   &ng_parse_uint32_type   },      \
  197           { "fragmentIdLinkCount", &ng_parse_uint32_type },     \
  198           { "fragmentPtrLinkCount", &ng_parse_uint32_type },    \
  199           { "sockCount",        &ng_parse_uint32_type   },      \
  200           { NULL }                                              \
  201 }
  202 
  203 enum {
  204         NGM_NAT_SET_IPADDR = 1,
  205         NGM_NAT_SET_MODE,
  206         NGM_NAT_SET_TARGET,
  207         NGM_NAT_REDIRECT_PORT,
  208         NGM_NAT_REDIRECT_ADDR,
  209         NGM_NAT_REDIRECT_PROTO,
  210         NGM_NAT_REDIRECT_DYNAMIC,
  211         NGM_NAT_REDIRECT_DELETE,
  212         NGM_NAT_ADD_SERVER,
  213         NGM_NAT_LIST_REDIRECTS,
  214         NGM_NAT_PROXY_RULE,
  215         NGM_NAT_LIBALIAS_INFO,
  216         NGM_NAT_SET_DLT,
  217         NGM_NAT_GET_DLT,
  218 };

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