bsd/netinet6/natpt_defs.h

   1 /*      $KAME: natpt_defs.h,v 1.7 2000/03/25 07:23:54 sumikawa Exp $    */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   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  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #define SAME            (0)
  33
  34 #define NATPT_MAXHASH   (397)
  35 #define MAXTSLOTENTRY   (4096)
  36
  37 #define SZSIN6          sizeof(struct sockaddr_in6)
  38 #define SZSIN           sizeof(struct sockaddr_in)
  39
  40 #define CAR(p)          ((p)->car)
  41 #define CDR(p)          ((p)->cdr)
  42 #define CAAR(p)         (CAR(CAR(p)))
  43 #define CADR(p)         (CAR(CDR(p)))
  44 #define CDAR(p)         (CDR(CAR(p)))
  45 #define CDDR(p)         (CDR(CDR(p)))
  46
  47 #ifndef TCP6
  48 #define tcp6hdr         tcphdr
  49 #endif
  50
  51
  52 #if defined(NATPT_ASSERT) && (NATPT_ASSERT != 0)
  53 # if defined(__STDC__)
  54 #  define       ASSERT(e)       ((e) ? (void)0 : natpt_assert(__FILE__, __LINE__, #e))
  55 # else  /* PCC */
  56 #  define       ASSERT(e)       ((e) ? (void)0 : natpt_assert(__FILE__, __LINE__, "e"))
  57 # endif
  58 #else
  59 # undef NATPT_ASSERT
  60 # define        ASSERT(e)       ((void)0)
  61 #endif
  62
  63
  64 #define IN4_ARE_ADDR_EQUAL(a, b)                                        \
  65         ((a)->s_addr == (b)->s_addr)
  66
  67
  68 #define ReturnEnobufs(m)        if (m == NULL) { errno = ENOBUFS; return (NULL); }
  69
  70
  71 #if (defined(KERNEL)) || (defined(_KERNEL))
  72
  73 #define isDebug(d)      (natpt_debug & (d))
  74 #define isDump(d)       (natpt_dump  & (d))
  75
  76 #define D_DIVEIN4                       0x00000001
  77 #define D_PEEKOUTGOINGV4                0x00000002
  78 #define D_TRANSLATINGIPV4               0x00000010
  79 #define D_TRANSLATEDIPV4                0x00001000
  80
  81 #define D_DIVEIN6                       0x00010000
  82 #define D_IN6REJECT                     0x00020000
  83 #define D_IN6ACCEPT                     0x00040000
  84 #define D_PEEKOUTGOINGV6                0x00080000
  85 #define D_TRANSLATINGIPV6               0x00100000
  86 #define D_TRANSLATEDIPV6                0x01000000
  87
  88 #define fixSuMiReICMPBug        (1)
  89
  90 #ifdef fixSuMiReICMPBug
  91 #define IPDST           (0xc48db2cb)            /* == 203.178.141.196   XXX     */
  92 #define ICMPSRC         (0x02c410ac)            /* == 172.16.196.2      XXX     */
  93 #endif
  94
  95 #endif  /* defined(KERNEL)                      */
  96
  97 /*
  98  *      OS dependencies
  99  */
 100
 101 #ifdef KERNEL
 102
 103 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
 104 #define rcb_list                list
 105 #endif
 106
 107 #ifdef __NetBSD__
 108 /*
 109  * Macros for type conversion
 110  * dtom(x) -    convert data pointer within mbuf to mbuf pointer (XXX)
 111  */
 112 #define dtom(x)         ((struct mbuf *)((long)(x) & ~(MSIZE-1)))
 113 #endif
 114
 115 #endif  /* _KERNEL      */
 116
 117
 118 /*
 119  *      Structure definitions.
 120  */
 121
 122 typedef struct  _cell
 123 {
 124     struct  _cell   *car;
 125     struct  _cell   *cdr;
 126 }   Cell;
 127
 128
 129 /* Interface Box structure                                              */
 130
 131 struct ifBox
 132 {
 133     int                  side;
 134 #define noSide                  (0)
 135 #define inSide                  (1)
 136 #define outSide                 (2)
 137     char                 ifName[IFNAMSIZ];
 138     struct ifnet        *ifnet;
 139 };
 140
 141
 142 /* IP ...                                                               */
 143
 144 struct _cv                                              /* 28[byte]     */
 145 {
 146     u_char       ip_p;                  /* IPPROTO_(ICMP[46]|TCP|UDP)   */
 147     u_char       ip_payload;            /* IPPROTO_(ICMP|TCP|UDP)       */
 148
 149     u_char       inout;
 150 /*      #define NATPT_UNSPEC            (0)                             */
 151 /*      #define NATPT_INBOUND           (1)                             */
 152 /*      #define NATPT_OUTBOUND          (2)                             */
 153
 154     u_char       flags;
 155 #define         NATPT_TRACEROUTE        (0x01)
 156 #define         NATPT_NEEDFRAGMENT      (0x02)
 157
 158     int          poff;                  /* payload offset               */
 159     int          plen;                  /* payload length               */
 160
 161     struct mbuf         *m;
 162     struct _tSlot       *ats;
 163     union
 164     {
 165         struct ip       *_ip4;
 166         struct ip6_hdr  *_ip6;
 167     }            _ip;
 168     union
 169     {
 170         caddr_t           _caddr;
 171         struct icmp      *_icmp4;
 172         struct icmp6_hdr *_icmp6;
 173         struct tcphdr    *_tcp4;
 174         struct tcp6hdr   *_tcp6;
 175         struct udphdr    *_udp;
 176     }            _payload;
 177 };
 178
 179
 180 /* IP address structure                                                 */
 181
 182 union inaddr                                    /* sizeof():  16[byte]  */
 183 {
 184     struct in_addr      in4;
 185     struct in6_addr     in6;
 186 };
 187
 188
 189 struct pAddr                                    /* sizeof():  44[byte]  */
 190 {
 191     u_char              ip_p;           /* protocol family (within struct _tSlot)       */
 192     u_char              sa_family;      /* address family  (within struct _cSlot)       */
 193
 194     u_short             port[2];
 195 #define _port0                  port[0]
 196 #define _port1                  port[1]
 197
 198 #define _sport                  port[0]
 199 #define _dport                  port[1]
 200 #define _eport                  port[1]
 201
 202     union inaddr        addr[2];
 203
 204 #define in4src                  addr[0].in4
 205 #define in4dst                  addr[1].in4
 206 #define in4Addr                 addr[0].in4
 207 #define in4Mask                 addr[1].in4
 208 #define in4RangeStart           addr[0].in4
 209 #define in4RangeEnd             addr[1].in4
 210
 211 #define in6src                  addr[0].in6
 212 #define in6dst                  addr[1].in6
 213 #define in6Addr                 addr[0].in6
 214 #define in6Mask                 addr[1].in6
 215
 216     struct
 217     {
 218         u_char          type;
 219 #define ADDR_ANY                (0)
 220 #define ADDR_SINGLE             (1)
 221 #define ADDR_MASK               (2)
 222 #define ADDR_RANGE              (3)
 223 #define ADDR_FAITH              (4)
 224
 225         u_char          prefix;
 226     }                   ad;
 227 };
 228
 229
 230 /* Configuration slot entry                                             */
 231
 232 struct  _cSlot                                  /* sizeof(): 100[byte]  */
 233 {
 234     u_char               flags;
 235 #define NATPT_STATIC            (1)     /* Rule was set statically      */
 236 #define NATPT_DYNAMIC           (2)     /* Rule was set dynamically     */
 237 #define NATPT_FAITH             (3)
 238
 239     u_char               dir;
 240 #define NATPT_UNSPEC            (0)
 241 #define NATPT_INBOUND           (1)
 242 #define NATPT_OUTBOUND          (2)
 243
 244     u_char               map;
 245 #define NATPT_PORT_MAP          (0x01)  /* Mapping dest port               */
 246 #define NATPT_PORT_MAP_DYNAMIC  (0x02)  /* Mapping dest port dynamically */
 247 #define NATPT_ADDR_MAP          (0x04)  /* Mapping dest addr               */
 248 #define NATPT_ADDR_MAP_DYNAMIC  (0x08)  /* Mapping dest addr dynamically */
 249
 250     u_char               proto;
 251
 252     u_short              prefix;
 253     u_short              cport;         /* current port                 */
 254
 255     struct pAddr         local, remote;
 256     struct _cSlotAux    *aux;           /* place holder                 */
 257 };
 258
 259
 260 #if     0
 261 /* Configuration slot auxiliary entry                                   */
 262 /* currently not used                                                   */
 263
 264 struct  _cSlotAux                               /* sizeof():   0[byte]  */
 265 {
 266 };
 267 #endif
 268
 269
 270 /* Translation slot entry                                               */
 271
 272 struct  _tSlot                                  /* sizeof(): 104[byte]  */
 273 {
 274     u_char      ip_payload;
 275
 276     u_char      session;
 277 /* #define      NATPT_UNSPEC            (0)             */
 278 /* #define      NATPT_INBOUND           (1)             */
 279 /* #define      NATPT_OUTBOUND          (2)             */
 280
 281     u_char      remap;
 282 /* #define      NATPT_PORT_REMAP        (0x01)          */
 283 /* #define      NATPT_ADDR_REMAP        (0x02)          */
 284
 285 /* #define NATPT_STATIC         (0x1)                    */
 286 /* #define NATPT_DYNAMIC        (0x2)                    */
 287 /* #define NATPT_FAITH          (0x3)                    */
 288
 289     struct pAddr        local;
 290     struct pAddr        remote;
 291     time_t              tstamp;
 292     int                 lcount;
 293
 294     union
 295     {
 296         struct _idseq
 297         {
 298             n_short              icd_id;
 299             n_short              icd_seq;
 300         }                        ih_idseq;
 301         struct _tcpstate        *tcp;
 302     }                            suit;
 303 };
 304
 305
 306 struct _tcpstate                                /* sizeof():  28[byte]  */
 307 {
 308     short       _state;
 309     short       _session;
 310     u_long      _ip_id[2];      /* IP packet Identification                     */
 311                                 /*    [0]: current packet                       */
 312                                 /*    [1]: just before packet                   */
 313     u_short     _port[2];       /* [0]:outGoing srcPort, [1]:inComing dstPort   */
 314 /*  u_long      _iss;                   initial send sequence number            */
 315     u_long      _delta[3];      /* Sequence delta                               */
 316                                 /*    [0]: current     (cumulative)             */
 317                                 /*    [1]: just before (cumulative)             */
 318                                 /*    [2]: (this time)                          */
 319 };