sbin/ipfw3/ipfw3.h

   1 /*
   2  * Copyright (c) 2014 - 2016 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Bill Yuan <bycn82@dragonflybsd.org>
   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
  36 #ifndef _IPFW3_H_
  37 #define _IPFW3_H_
  38
  39 /*
  40  * This macro returns the size of a struct sockaddr when passed
  41  * through a routing socket. Basically we round up sa_len to
  42  * a multiple of sizeof(long), with a minimum of sizeof(long).
  43  * The check for a NULL pointer is just a convenience, probably never used.
  44  * The case sa_len == 0 should only apply to empty structures.
  45  */
  46 #define SA_SIZE(sa)                                             \
  47         ( (!(sa) || ((struct sockaddr *)(sa))->sa_len == 0) ?   \
  48         sizeof(long)            :                               \
  49         1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) )
  50
  51 /*
  52  * Definition of a port range, and macros to deal with values.
  53  * FORMAT: HI 16-bits == first port in range, 0 == all ports.
  54  *               LO 16-bits == number of ports in range
  55  * NOTES: - Port values are not stored in network byte order.
  56  */
  57
  58
  59 #define GETLOPORT(x)    ((x) >> 0x10)
  60 #define GETNUMPORTS(x)  ((x) & 0x0000ffff)
  61 #define GETHIPORT(x)    (GETLOPORT((x)) + GETNUMPORTS((x)))
  62
  63 /* Set y to be the low-port value in port_range variable x. */
  64 #define SETLOPORT(x, y) ((x) = ((x) & 0x0000ffff) | ((y) << 0x10))
  65
  66 /* Set y to be the number of ports in port_range variable x. */
  67 #define SETNUMPORTS(x, y) ((x) = ((x) & 0xffff0000) | (y))
  68
  69 #define INC_ARGCV() do {                        \
  70         (*_av)++;                               \
  71         (*_ac)--;                               \
  72         av = *_av;                              \
  73         ac = *_ac;                              \
  74 } while (0)
  75
  76
  77 enum tokens {
  78         TOK_NULL=0,
  79
  80         TOK_IP,
  81         TOK_IF,
  82         TOK_ALOG,
  83         TOK_DENY_INC,
  84         TOK_SAME_PORTS,
  85         TOK_UNREG_ONLY,
  86         TOK_RESET_ADDR,
  87         TOK_ALIAS_REV,
  88         TOK_PROXY_ONLY,
  89         TOK_REDIR_ADDR,
  90         TOK_REDIR_PORT,
  91         TOK_REDIR_PROTO,
  92
  93         TOK_PIPE,
  94         TOK_QUEUE,
  95         TOK_PLR,
  96         TOK_NOERROR,
  97         TOK_BUCKETS,
  98         TOK_DSTIP,
  99         TOK_SRCIP,
 100         TOK_DSTPORT,
 101         TOK_SRCPORT,
 102         TOK_ALL,
 103         TOK_MASK,
 104         TOK_BW,
 105         TOK_DELAY,
 106         TOK_RED,
 107         TOK_GRED,
 108         TOK_DROPTAIL,
 109         TOK_PROTO,
 110         TOK_WEIGHT,
 111 };
 112
 113 struct char_int_map {
 114         char *key;
 115         int val;
 116 };
 117
 118 typedef void (*parser_func)(ipfw_insn **cmd,int *ac, char **av[]);
 119 typedef void (*shower_func)(ipfw_insn *cmd, int show_or);
 120 typedef void (*register_func)(int module, int opcode,
 121                 parser_func parser, shower_func shower);
 122 typedef void (*register_keyword)(int module, int opcode, char *word, int type);
 123 void register_ipfw_keyword(int module, int opcode, char *word, int type);
 124 void register_ipfw_func(int module, int opcode,
 125                 parser_func parser, shower_func shower);
 126 typedef void (*init_module)(register_func func, register_keyword keyword);
 127 int do_get_x(int optname, void *rule, int *optlen);
 128 int do_set_x(int optname, void *rule, int optlen);
 129
 130 int match_token(struct char_int_map *table, char *string);
 131 #endif