lib/libipfw3/nat/ipfw3_nat.c

   1 /*
   2  * Copyright (c) 2014 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Bill Yuan <bycn82@gmail.com>
   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  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37
  38 #include <net/if.h>
  39 #include <net/route.h>
  40 #include <net/pfil.h>
  41 #include <netinet/in.h>
  42
  43 #include "../../../sys/net/ipfw3/ip_fw3.h"
  44 #include "../../../sbin/ipfw3/ipfw.h"
  45 #include "ipfw3_nat.h"
  46
  47
  48 void
  49 parse_nat(ipfw_insn **cmd, int *ac, char **av[])
  50 {
  51         NEXT_ARG1;
  52         (*cmd)->opcode = O_NAT_NAT;
  53         (*cmd)->module = MODULE_NAT_ID;
  54         (*cmd)->len = F_INSN_SIZE(ipfw_insn_nat);
  55         (*cmd)->arg1 = strtoul(**av, NULL, 10);
  56         ((ipfw_insn_nat *)(*cmd))->nat = NULL;
  57         NEXT_ARG1;
  58 }
  59
  60 void
  61 show_nat(ipfw_insn *cmd, int show_or)
  62 {
  63         printf(" nat %u", cmd->arg1);
  64 }
  65
  66 void
  67 load_module(register_func function, register_keyword keyword)
  68 {
  69         keyword(MODULE_NAT_ID, O_NAT_NAT, "nat", ACTION);
  70         function(MODULE_NAT_ID, O_NAT_NAT,
  71                 (parser_func)parse_nat, (shower_func)show_nat);
  72 }