bsd/netinet/ip_nat.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (C) 1995-1997 by Darren Reed.
  24  *
  25  * Redistribution and use in source and binary forms are permitted
  26  * provided that this notice is preserved and due credit is given
  27  * to the original author and the contributors.
  28  *
  29  * @(#)ip_nat.h 1.5 2/4/96
  30  */
  31
  32 #ifndef __IP_NAT_H__
  33 #define __IP_NAT_H__
  34
  35 #ifndef SOLARIS
  36 #define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
  37 #endif
  38
  39 #if defined(__STDC__) || defined(__GNUC__)
  40 #define SIOCADNAT       _IOW('r', 80, struct ipnat)
  41 #define SIOCRMNAT       _IOW('r', 81, struct ipnat)
  42 #define SIOCGNATS       _IOR('r', 82, struct natstat)
  43 #define SIOCGNATL       _IOWR('r', 83, struct natlookup)
  44 #define SIOCGFRST       _IOR('r', 84, struct ipfrstat)
  45 #define SIOCGIPST       _IOR('r', 85, struct ips_stat)
  46 #define SIOCFLNAT       _IOWR('r', 86, int)
  47 #define SIOCCNATL       _IOWR('r', 87, int)
  48 #else
  49 #define SIOCADNAT       _IOW(r, 80, struct ipnat)
  50 #define SIOCRMNAT       _IOW(r, 81, struct ipnat)
  51 #define SIOCGNATS       _IOR(r, 82, struct natstat)
  52 #define SIOCGNATL       _IOWR(r, 83, struct natlookup)
  53 #define SIOCGFRST       _IOR(r, 84, struct ipfrstat)
  54 #define SIOCGIPST       _IOR(r, 85, struct ips_stat)
  55 #define SIOCFLNAT       _IOWR(r, 86, int)
  56 #define SIOCCNATL       _IOWR(r, 87, int)
  57 #endif
  58
  59 #define NAT_SIZE        367
  60 #ifndef APR_LABELLEN
  61 #define APR_LABELLEN    16
  62 #endif
  63
  64 typedef struct  nat     {
  65         u_long  nat_age;
  66         int     nat_flags;
  67         u_32_t  nat_sumd;
  68         u_32_t  nat_ipsumd;
  69         void    *nat_data;
  70         struct  in_addr nat_inip;
  71         struct  in_addr nat_outip;
  72         struct  in_addr nat_oip;        /* other ip */
  73         U_QUAD_T        nat_pkts;
  74         U_QUAD_T        nat_bytes;
  75         u_short nat_oport;      /* other port */
  76         u_short nat_inport;
  77         u_short nat_outport;
  78         u_short nat_use;
  79         u_char  nat_state[2];
  80         struct  ipnat   *nat_ptr;
  81         struct  nat     *nat_next;
  82         struct  nat     *nat_hnext[2];
  83         struct  nat     **nat_hstart[2];
  84         void    *nat_ifp;
  85         int     nat_dir;
  86 } nat_t;
  87
  88 typedef struct  ipnat   {
  89         struct  ipnat   *in_next;
  90         void    *in_ifp;
  91         void    *in_apr;
  92         u_int   in_space;
  93         u_int   in_use;
  94         struct  in_addr in_nextip;
  95         u_short in_pnext;
  96         u_short in_flags;
  97         u_short in_port[2];
  98         struct  in_addr in_in[2];
  99         struct  in_addr in_out[2];
 100         int     in_redir; /* 0 if it's a mapping, 1 if it's a hard redir */
 101         char    in_ifname[IFNAMSIZ];
 102         char    in_plabel[APR_LABELLEN];        /* proxy label */
 103         char    in_p;   /* protocol */
 104         u_short in_dport;
 105 } ipnat_t;
 106
 107 #define in_pmin         in_port[0]      /* Also holds static redir port */
 108 #define in_pmax         in_port[1]
 109 #define in_nip          in_nextip.s_addr
 110 #define in_inip         in_in[0].s_addr
 111 #define in_inmsk        in_in[1].s_addr
 112 #define in_outip        in_out[0].s_addr
 113 #define in_outmsk       in_out[1].s_addr
 114
 115 #define NAT_OUTBOUND    0
 116 #define NAT_INBOUND     1
 117
 118 #define NAT_MAP         0x01
 119 #define NAT_REDIRECT    0x02
 120 #define NAT_BIMAP       (NAT_MAP|NAT_REDIRECT)
 121
 122 #define IPN_CMPSIZ      (sizeof(struct in_addr) * 4 + sizeof(u_short) * 3 + \
 123                          sizeof(int) + IFNAMSIZ + APR_LABELLEN + sizeof(char))
 124
 125 typedef struct  natlookup {
 126         struct  in_addr nl_inip;
 127         struct  in_addr nl_outip;
 128         struct  in_addr nl_realip;
 129         int     nl_flags;
 130         u_short nl_inport;
 131         u_short nl_outport;
 132         u_short nl_realport;
 133 } natlookup_t;
 134
 135 typedef struct  natstat {
 136         u_long  ns_mapped[2];
 137         u_long  ns_rules;
 138         u_long  ns_added;
 139         u_long  ns_expire;
 140         u_long  ns_inuse;
 141         u_long  ns_logged;
 142         u_long  ns_logfail;
 143         nat_t   **ns_table[2];
 144         ipnat_t *ns_list;
 145 } natstat_t;
 146
 147 #define IPN_ANY         0x00
 148 #define IPN_TCP         0x01
 149 #define IPN_UDP         0x02
 150 #define IPN_TCPUDP      0x03
 151 #define IPN_DELETE      0x04
 152 #define IPN_ICMPERR     0x08
 153
 154
 155 typedef struct  natlog {
 156         struct  in_addr nl_origip;
 157         struct  in_addr nl_outip;
 158         struct  in_addr nl_inip;
 159         u_short nl_origport;
 160         u_short nl_outport;
 161         u_short nl_inport;
 162         u_short nl_type;
 163         int     nl_rule;
 164         U_QUAD_T        nl_pkts;
 165         U_QUAD_T        nl_bytes;
 166 } natlog_t;
 167
 168
 169 #define NL_NEWMAP       NAT_MAP
 170 #define NL_NEWRDR       NAT_REDIRECT
 171 #define NL_EXPIRE       0xffff
 172
 173
 174 extern  void    ip_natsync __P((void *));
 175 extern  u_long  fr_defnatage;
 176 extern  u_long  fr_defnaticmpage;
 177 extern  nat_t   *nat_table[2][NAT_SIZE];
 178 #if defined(__NetBSD__) || defined(__OpenBSD__) || (__FreeBSD_version >= 300003)
 179 extern  int     nat_ioctl __P((caddr_t, u_long, int));
 180 #else
 181 extern  int     nat_ioctl __P((caddr_t, int, int));
 182 #endif
 183 extern  nat_t   *nat_new __P((ipnat_t *, ip_t *, fr_info_t *, u_short, int));
 184 extern  nat_t   *nat_outlookup __P((void *, int, struct in_addr, u_short,
 185                                  struct in_addr, u_short));
 186 extern  nat_t   *nat_inlookup __P((void *, int, struct in_addr, u_short,
 187                                 struct in_addr, u_short));
 188 extern  nat_t   *nat_lookupredir __P((natlookup_t *));
 189 extern  nat_t   *nat_lookupmapip __P((void *, int, struct in_addr, u_short,
 190                                    struct in_addr, u_short));
 191 extern  nat_t   *nat_icmpinlookup __P((ip_t *, fr_info_t *));
 192 extern  nat_t   *nat_icmpin __P((ip_t *, fr_info_t *, int *));
 193
 194 extern  int     ip_natout __P((ip_t *, int, fr_info_t *));
 195 extern  int     ip_natin __P((ip_t *, int, fr_info_t *));
 196 extern  void    ip_natunload __P((void)), ip_natexpire __P((void));
 197 extern  void    nat_log __P((struct nat *, u_short));
 198 extern  void    fix_incksum __P((u_short *, u_32_t));
 199 extern  void    fix_outcksum __P((u_short *, u_32_t));
 200
 201 #endif /* __IP_NAT_H__ */