sys/net/ipfw3/ip_fw3.h

   1 /*
   2  * Copyright (c) 1993 Daniel Boulet
   3  * Copyright (c) 1994 Ugen J.S.Antsilevich
   4  * Copyright (c) 2002 Luigi Rizzo, Universita` di Pisa
   5  * Copyright (c) 2015 - 2018 The DragonFly Project.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to The DragonFly Project
   8  * by Bill Yuan <bycn82@dragonflybsd.org>
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  * 3. Neither the name of The DragonFly Project nor the names of its
  21  *    contributors may be used to endorse or promote products derived
  22  *    from this software without specific, prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  27  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  28  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  30  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  31  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  32  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  33  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  34  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  */
  38
  39 #ifndef _IP_FW3_H_
  40 #define _IP_FW3_H_
  41
  42 /*
  43  * _IPFW2_H is from ipfw/ip_fw2.h, both cannot be included past this
  44  * point but we need both the IPFW2_LOADED and IPFW3_LOADED macros
  45  */
  46 #ifndef _IPFW2_H
  47
  48
  49 #include <net/bpf.h>
  50
  51
  52 #define NEED1(msg)  {if (ac < 1) errx(EX_USAGE, msg);}
  53 #define NEED2(msg)  {if (ac < 2) errx(EX_USAGE, msg);}
  54 #define NEED(c, n, msg) {if (c < n) errx(EX_USAGE, msg);}
  55
  56 #define NEXT_ARG        ac--; if(ac > 0){av++;}
  57 #define NEXT_ARG1       (*ac)--; if(*ac > 0){(*av)++;}
  58 #define SWAP_ARG                                \
  59 do {                                            \
  60         if (ac > 2 && isdigit(*(av[1]))) {      \
  61                 char *p = av[1];                \
  62                 av[1] = av[2];                  \
  63                 av[2] = p;                      \
  64         }                                       \
  65 } while (0)
  66
  67 #define IPFW_RULE_SIZE_MAX      255     /* unit: uint32_t */
  68
  69 /*
  70  * type of the keyword, it indecates the position of the keyword in the rule
  71  *      BEFORE ACTION FROM TO FILTER OTHER
  72  */
  73 #define NONE            0
  74 #define BEFORE          1
  75 #define ACTION          2
  76 #define PROTO           3
  77 #define FROM            4
  78 #define TO              5
  79 #define FILTER          6
  80 #define AFTER           7
  81
  82 #define NOT_IN_USE      0
  83 #define IN_USE          1
  84
  85 #define SIZE_OF_IPFWINSN        8
  86 #define LEN_OF_IPFWINSN         2
  87 #define IPFW_DEFAULT_RULE       65535
  88 #define IPFW_DEFAULT_SET        0
  89 #define IPFW_ALL_SETS           0
  90
  91 /*
  92  * Template for instructions.
  93  *
  94  * ipfw_insn is used for all instructions which require no operands,
  95  * a single 16-bit value (arg1), or a couple of 8-bit values.
  96  *
  97  * For other instructions which require different/larger arguments
  98  * we have derived structures, ipfw_insn_*.
  99  *
 100  * The size of the instruction (in 32-bit words) is in the low
 101  * 6 bits of "len". The 2 remaining bits are used to implement
 102  * NOT and OR on individual instructions. Given a type, you can
 103  * compute the length to be put in "len" using F_INSN_SIZE(t)
 104  *
 105  * F_NOT        negates the match result of the instruction.
 106  *
 107  * F_OR         is used to build or blocks. By default, instructions
 108  *              are evaluated as part of a logical AND. An "or" block
 109  *              { X or Y or Z } contains F_OR set in all but the last
 110  *              instruction of the block. A match will cause the code
 111  *              to skip past the last instruction of the block.
 112  *
 113  * NOTA BENE: in a couple of places we assume that
 114  *      sizeof(ipfw_insn) == sizeof(uint32_t)
 115  * this needs to be fixed.
 116  *
 117  */
 118
 119 #define F_NOT           0x80
 120 #define F_OR            0x40
 121 #define F_LEN_MASK      0x3f
 122 #define F_LEN(cmd)      ((cmd)->len & F_LEN_MASK)
 123
 124 typedef struct  _ipfw_insn {    /* template for instructions */
 125         uint8_t         opcode;
 126         uint8_t         len;    /* numer of 32-byte words */
 127         uint16_t        arg1;
 128
 129         uint8_t         module;
 130         uint8_t         arg3;
 131         uint16_t        arg2;
 132 } ipfw_insn;
 133
 134 #define ACTION_PTR(rule)        \
 135         (ipfw_insn *)((uint32_t *)((rule)->cmd) + ((rule)->act_ofs))
 136
 137 /*
 138  * The F_INSN_SIZE(type) computes the size, in 4-byte words, of
 139  * a given type.
 140  */
 141 #define F_INSN_SIZE(t)  ((sizeof (t))/sizeof(uint32_t))
 142
 143 #define MTAG_IPFW       1148380143      /* IPFW-tagged cookie */
 144
 145 /*
 146  * This is used to store an array of 16-bit entries (ports etc.)
 147  */
 148 typedef struct  _ipfw_insn_u16 {
 149         ipfw_insn o;
 150         uint16_t ports[2];      /* there may be more */
 151 } ipfw_insn_u16;
 152
 153 /*
 154  * This is used to store an array of 32-bit entries
 155  * (uid, single IPv4 addresses etc.)
 156  */
 157 typedef struct  _ipfw_insn_u32 {
 158         ipfw_insn o;
 159         uint32_t d[1];  /* one or more */
 160 } ipfw_insn_u32;
 161
 162 /*
 163  * This is used to store IP addr-mask pairs.
 164  */
 165 typedef struct  _ipfw_insn_ip {
 166         ipfw_insn o;
 167         struct in_addr  addr;
 168         struct in_addr  mask;
 169 } ipfw_insn_ip;
 170
 171 /*
 172  * This is used to forward to a given address (ip)
 173  */
 174 typedef struct  _ipfw_insn_sa {
 175         ipfw_insn o;
 176         struct sockaddr_in sa;
 177 } ipfw_insn_sa;
 178
 179 /*
 180  * This is used for MAC addr-mask pairs.
 181  */
 182 typedef struct  _ipfw_insn_mac {
 183         ipfw_insn o;
 184         u_char addr[12];        /* dst[6] + src[6] */
 185         u_char mask[12];        /* dst[6] + src[6] */
 186 } ipfw_insn_mac;
 187
 188 /*
 189  * This is used for interface match rules (recv xx, xmit xx)
 190  */
 191 typedef struct  _ipfw_insn_if {
 192         ipfw_insn o;
 193         union {
 194                 struct in_addr ip;
 195                 int glob;
 196         } p;
 197         char name[IFNAMSIZ];
 198 } ipfw_insn_if;
 199
 200 /*
 201  * This is used for pipe and queue actions, which need to store
 202  * a single pointer (which can have different size on different
 203  * architectures.
 204  */
 205 typedef struct  _ipfw_insn_pipe {
 206         ipfw_insn       o;
 207         void            *pipe_ptr;
 208 } ipfw_insn_pipe;
 209
 210 /*
 211  * This is used for limit rules.
 212  */
 213 typedef struct  _ipfw_insn_limit {
 214         ipfw_insn o;
 215         uint8_t _pad;
 216         uint8_t limit_mask;     /* combination of DYN_* below   */
 217 #define DYN_SRC_ADDR    0x1
 218 #define DYN_SRC_PORT    0x2
 219 #define DYN_DST_ADDR    0x4
 220 #define DYN_DST_PORT    0x8
 221
 222         uint16_t conn_limit;
 223 } ipfw_insn_limit;
 224
 225 /*
 226  * This is used for bpf filtering.
 227  */
 228 typedef struct _ipfw_insn_bpf {
 229         ipfw_insn o;
 230         char bf_str[128];
 231         u_int bf_len;
 232         struct bpf_insn bf_insn[1];
 233 } ipfw_insn_bpf;
 234
 235 /*
 236  * Here we have the structure representing an ipfw rule.
 237  *
 238  * It starts with a general area (with link fields and counters)
 239  * followed by an array of one or more instructions, which the code
 240  * accesses as an array of 32-bit values.
 241  *
 242  * Given a rule pointer  r:
 243  *
 244  *  r->cmd              is the start of the first instruction.
 245  *  ACTION_PTR(r)       is the start of the first action (things to do
 246  *                      once a rule matched).
 247  *
 248  * When assembling instruction, remember the following:
 249  *
 250  *  + if a rule has a "keep-state" (or "limit") option, then the
 251  *      first instruction (at r->cmd) MUST BE an O_PROBE_STATE
 252  *  + if a rule has a "log" option, then the first action
 253  *      (at ACTION_PTR(r)) MUST be O_LOG
 254  *
 255  * NOTE: we use a simple linked list of rules because we never need
 256  *      to delete a rule without scanning the list. We do not use
 257  *      queue(3) macros for portability and readability.
 258  */
 259
 260 struct ip_fw {
 261         struct ip_fw    *next;          /* linked list of rules         */
 262         struct ip_fw    *next_rule;     /* ptr to next [skipto] rule    */
 263         uint16_t        act_ofs;        /* offset of action in 32-bit units */
 264         uint16_t        cmd_len;        /* # of 32-bit words in cmd     */
 265         uint16_t        rulenum;        /* rule number                  */
 266         uint8_t         set;            /* rule set (0..31)             */
 267         uint8_t         flags;          /* IPFW_USR_F_                  */
 268
 269         /* These fields are present in all rules.                       */
 270         uint64_t        pcnt;           /* Packet counter               */
 271         uint64_t        bcnt;           /* Byte counter                 */
 272         uint32_t        timestamp;      /* tv_sec of last match         */
 273
 274         struct ip_fw    *sibling;       /* pointer to the rule in next CPU */
 275
 276         ipfw_insn       cmd[1];         /* storage for commands         */
 277 };
 278 #define LEN_FW3 sizeof(struct ip_fw)
 279
 280 #define IPFW_RULE_F_INVALID     0x1
 281 #define IPFW_RULE_F_STATE       0x2
 282
 283 #define RULESIZE(rule) (sizeof(struct ip_fw) + (rule)->cmd_len * 4 - SIZE_OF_IPFWINSN)
 284
 285 /*
 286  * This structure is used as a flow mask and a flow id for various
 287  * parts of the code.
 288  */
 289 struct ipfw_flow_id {
 290         uint32_t        dst_ip;
 291         uint32_t        src_ip;
 292         uint16_t        dst_port;
 293         uint16_t        src_port;
 294         uint8_t         proto;
 295         uint8_t         flags;  /* protocol-specific flags */
 296 };
 297
 298
 299 /* ip_fw3_chk/ip_fw_chk_ptr return values */
 300 #define IP_FW_PASS      0
 301 #define IP_FW_DENY      1
 302 #define IP_FW_DIVERT    2
 303 #define IP_FW_TEE       3
 304 #define IP_FW_DUMMYNET  4
 305 #define IP_FW_NAT       5
 306 #define IP_FW_ROUTE     6
 307
 308 /* ip_fw3_chk controller values */
 309 #define IP_FW_CTL_NO            0
 310 #define IP_FW_CTL_DONE          1
 311 #define IP_FW_CTL_AGAIN         2
 312 #define IP_FW_CTL_NEXT          3
 313 #define IP_FW_CTL_NAT           4
 314 #define IP_FW_CTL_LOOP          5
 315 #define IP_FW_CTL_CHK_STATE     6
 316
 317 #define IP_FW_NOT_MATCH         0
 318 #define IP_FW_MATCH             1
 319
 320 /*
 321  * arguments for calling ip_fw3_chk() and dummynet_io(). We put them
 322  * all into a structure because this way it is easier and more
 323  * efficient to pass variables around and extend the interface.
 324  */
 325 struct ip_fw_args {
 326         struct mbuf     *m;             /* the mbuf chain               */
 327         struct ifnet    *oif;           /* output interface             */
 328         struct ip_fw    *rule;          /* matching rule                */
 329         struct ether_header *eh;        /* for bridged packets          */
 330
 331         struct ipfw_flow_id f_id;       /* grabbed from IP header       */
 332
 333         /*
 334          * Depend on the return value of ip_fw3_chk/ip_fw_chk_ptr
 335          * 'cookie' field may save following information:
 336          *
 337          * IP_FW_DUMMYNET
 338          *   The pipe or queue number
 339          */
 340         uint32_t        cookie;
 341 };
 342
 343 struct ipfw_ioc_rule {
 344         uint16_t        act_ofs;        /* offset of action in 32-bit units */
 345         uint16_t        cmd_len;        /* # of 32-bit words in cmd     */
 346         uint16_t        rulenum;        /* rule number                  */
 347         uint8_t         set;            /* rule set (0..31)             */
 348
 349         /* Rule set information */
 350         uint32_t        sets;   /* disabled rule sets           */
 351
 352         /* Statistics */
 353         uint64_t        pcnt;           /* Packet counter               */
 354         uint64_t        bcnt;           /* Byte counter                 */
 355         uint32_t        timestamp;      /* tv_sec of last match         */
 356
 357         ipfw_insn       cmd[1];         /* storage for commands         */
 358 };
 359
 360 #define IOC_RULESIZE(rule)      \
 361         (sizeof(struct ipfw_ioc_rule) + (rule)->cmd_len * 4 - SIZE_OF_IPFWINSN)
 362
 363
 364 /* IP_FW_X header/opcodes */
 365 typedef struct _ip_fw_x_header {
 366         uint16_t opcode;        /* Operation opcode */
 367         uint16_t _pad;          /* Opcode version */
 368 } ip_fw_x_header;
 369
 370 /* IP_FW3 opcodes */
 371 #define IP_FW_ADD               50   /* add a firewall rule to chain */
 372 #define IP_FW_DEL               51   /* delete a firewall rule from chain */
 373 #define IP_FW_FLUSH             52   /* flush firewall rule chain */
 374 #define IP_FW_ZERO              53   /* clear single/all firewall counter(s) */
 375 #define IP_FW_GET               54   /* get entire firewall rule chain */
 376 #define IP_FW_RESETLOG          55   /* reset logging counters */
 377
 378 #define IP_FW_STATE_ADD         56   /* add one state */
 379 #define IP_FW_STATE_DEL         57   /* delete states of one rulenum */
 380 #define IP_FW_STATE_FLUSH       58   /* flush all states */
 381 #define IP_FW_STATE_GET         59   /* get all states */
 382
 383 #define IP_DUMMYNET_CONFIGURE   60   /* add/configure a dummynet pipe */
 384 #define IP_DUMMYNET_DEL         61   /* delete a dummynet pipe from chain */
 385 #define IP_DUMMYNET_FLUSH       62   /* flush dummynet */
 386 #define IP_DUMMYNET_GET         64   /* get entire dummynet pipes */
 387
 388 #define IP_FW_MODULE            67  /* get modules names */
 389
 390 #define IP_FW_NAT_ADD           68   /* add/config a nat rule */
 391 #define IP_FW_NAT_DEL           69   /* delete a nat rule */
 392 #define IP_FW_NAT_FLUSH         70   /* get configuration of a nat rule */
 393 #define IP_FW_NAT_GET           71   /* get config of a nat rule */
 394 #define IP_FW_NAT_GET_RECORD    72   /* get nat record of a nat rule */
 395
 396 #define IP_FW_TABLE_CREATE      73      /* table_create         */
 397 #define IP_FW_TABLE_DELETE      74      /* table_delete         */
 398 #define IP_FW_TABLE_APPEND      75      /* table_append         */
 399 #define IP_FW_TABLE_REMOVE      76      /* table_remove         */
 400 #define IP_FW_TABLE_LIST        77      /* table_list           */
 401 #define IP_FW_TABLE_FLUSH       78      /* table_flush          */
 402 #define IP_FW_TABLE_SHOW        79      /* table_show           */
 403 #define IP_FW_TABLE_TEST        80      /* table_test           */
 404 #define IP_FW_TABLE_RENAME      81      /* rename a table       */
 405
 406 /* opcodes for ipfw3sync */
 407 #define IP_FW_SYNC_SHOW_CONF    82      /* show sync config */
 408 #define IP_FW_SYNC_SHOW_STATUS  83      /* show edge & centre running status */
 409
 410 #define IP_FW_SYNC_EDGE_CONF    84      /* config sync edge */
 411 #define IP_FW_SYNC_EDGE_START   85      /* start the edge */
 412 #define IP_FW_SYNC_EDGE_STOP    86      /* stop the edge */
 413 #define IP_FW_SYNC_EDGE_TEST    87      /* test sync edge */
 414 #define IP_FW_SYNC_EDGE_CLEAR   88      /* stop and clear the edge */
 415
 416 #define IP_FW_SYNC_CENTRE_CONF  89      /* config sync centre */
 417 #define IP_FW_SYNC_CENTRE_START 90      /* start the centre */
 418 #define IP_FW_SYNC_CENTRE_STOP  91      /* stop the centre */
 419 #define IP_FW_SYNC_CENTRE_TEST  92      /* test sync centre */
 420 #define IP_FW_SYNC_CENTRE_CLEAR 93      /* stop and clear the centre */
 421
 422 #define IP_FW_SET_GET           95      /* get the set config */
 423 #define IP_FW_SET_MOVE_RULE     96      /* move a rule to set */
 424 #define IP_FW_SET_MOVE_SET      97      /* move all rules from set a to b */
 425 #define IP_FW_SET_SWAP          98      /* swap 2 sets  */
 426 #define IP_FW_SET_TOGGLE        99      /* enable/disable a set */
 427 #define IP_FW_SET_FLUSH         100     /* flush the rule of the set */
 428
 429 #endif /* _IPFW2_H */
 430 #ifdef _KERNEL
 431
 432 #include <net/netisr2.h>
 433
 434 int     ip_fw3_sockopt(struct sockopt *);
 435
 436 extern int ip_fw3_loaded;
 437
 438 #define IPFW3_LOADED    (ip_fw3_loaded)
 439
 440 #ifdef IPFIREWALL3_DEBUG
 441 #define IPFW3_DEBUG1(str)               \
 442 do {                                    \
 443         kprintf(str);                   \
 444 } while (0)
 445 #define IPFW3_DEBUG(fmt, ...)           \
 446 do {                                    \
 447         kprintf(fmt, __VA_ARGS__);      \
 448 } while (0)
 449 #else
 450 #define IPFW3_DEBUG1(str)               ((void)0)
 451 #define IPFW3_DEBUG(fmt, ...)           ((void)0)
 452 #endif
 453
 454 typedef int     ip_fw_ctl_t(struct sockopt *);
 455 typedef int     ip_fw_chk_t(struct ip_fw_args *);
 456 typedef struct mbuf *ip_fw_dn_io_t(struct mbuf *, int, int, struct ip_fw_args *);
 457 typedef void *ip_fw_log_t(struct mbuf *m, struct ether_header *eh, uint16_t id);
 458
 459 #ifndef _IPFW2_H
 460
 461 int     ip_fw_sockopt(struct sockopt *);
 462
 463 struct sockopt;
 464 struct dn_flow_set;
 465
 466
 467 extern ip_fw_chk_t      *ip_fw_chk_ptr;
 468 extern ip_fw_ctl_t      *ip_fw_ctl_x_ptr;
 469 extern ip_fw_dn_io_t    *ip_fw_dn_io_ptr;
 470
 471
 472 #define IPFW_TABLES_MAX         32
 473 #define IPFW_USR_F_NORULE       0x01
 474 #define IPFW_CFGCPUID           0
 475 #define IPFW_CFGPORT            netisr_cpuport(IPFW_CFGCPUID)
 476 #define IPFW_ASSERT_CFGPORT(msgport)                            \
 477         KASSERT((msgport) == IPFW_CFGPORT, ("not IPFW CFGPORT"))
 478
 479
 480 /* root of place holding all information, per-cpu */
 481 struct ipfw3_context {
 482         struct ip_fw                    *rules;    /* rules*/
 483         struct ip_fw                    *default_rule;  /* default rule*/
 484         struct ipfw3_state_context      *state_ctx;
 485         struct ipfw3_table_context      *table_ctx;
 486
 487         /* each bit represents a disabled set, 0 is the default set */
 488         uint32_t                        sets;
 489 };
 490 #define LEN_FW3_CTX sizeof(struct ipfw3_context)
 491
 492 struct ipfw3_module{
 493         int     type;
 494         int     id;
 495         char    name[20];
 496 };
 497
 498
 499 /*
 500  * Definitions for IP option names.
 501  */
 502 #define IP_FW_IPOPT_LSRR        0x01
 503 #define IP_FW_IPOPT_SSRR        0x02
 504 #define IP_FW_IPOPT_RR          0x04
 505 #define IP_FW_IPOPT_TS          0x08
 506
 507 /*
 508  * Definitions for TCP option names.
 509  */
 510 #define IP_FW_TCPOPT_MSS        0x01
 511 #define IP_FW_TCPOPT_WINDOW     0x02
 512 #define IP_FW_TCPOPT_SACK       0x04
 513 #define IP_FW_TCPOPT_TS         0x08
 514 #define IP_FW_TCPOPT_CC         0x10
 515
 516 #define ICMP_REJECT_RST         0x100   /* fake ICMP code (send a TCP RST) */
 517
 518 #define MATCH_REVERSE   0
 519 #define MATCH_FORWARD   1
 520 #define MATCH_NONE      2
 521 #define MATCH_UNKNOWN   3
 522
 523 #define L3HDR(T, ip) ((T *)((uint32_t *)(ip) + (ip)->ip_hl))
 524
 525
 526 typedef void (*filter_func)(int *cmd_ctl,int *cmd_val,struct ip_fw_args **args,
 527                         struct ip_fw **f,ipfw_insn *cmd, uint16_t ip_len);
 528
 529 void    check_accept(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
 530                 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len);
 531 void    check_deny(int *cmd_ctl, int *cmd_val, struct ip_fw_args **args,
 532                 struct ip_fw **f, ipfw_insn *cmd, uint16_t ip_len);
 533
 534 void    ip_fw3_register_module(int module_id,char *module_name);
 535 int     ip_fw3_unregister_module(int module_id);
 536 void    ip_fw3_register_filter_funcs(int module, int opcode, filter_func func);
 537 void    ip_fw3_unregister_filter_funcs(int module,filter_func func);
 538
 539 void    init_module(void);
 540 int     ip_fw3_free_rule(struct ip_fw *rule);
 541 int     ip_fw3_chk(struct ip_fw_args *args);
 542 struct mbuf *ip_fw3_dummynet_io(struct mbuf *m, int pipe_nr, int dir, struct ip_fw_args *fwa);
 543 void    add_rule_dispatch(netmsg_t nmsg);
 544 void    ip_fw3_add_rule(struct ipfw_ioc_rule *ioc_rule);
 545 struct ip_fw *ip_fw3_delete_rule(struct ipfw3_context *ctx,
 546                  struct ip_fw *prev, struct ip_fw *rule);
 547 void    flush_rule_dispatch(netmsg_t nmsg);
 548 void    ip_fw3_ctl_flush_rule(int);
 549 void    delete_rule_dispatch(netmsg_t nmsg);
 550 int     ip_fw3_ctl_delete_rule(struct sockopt *sopt);
 551 void    ip_fw3_clear_counters(struct ip_fw *rule);
 552 void    ip_fw3_zero_entry_dispatch(netmsg_t nmsg);
 553 int     ip_fw3_ctl_zero_entry(int rulenum, int log_only);
 554 int     ip_fw3_ctl_add_rule(struct sockopt *sopt);
 555 int     ip_fw3_ctl_get_modules(struct sockopt *sopt);
 556 int     ip_fw3_ctl_get_rules(struct sockopt *sopt);
 557 int     ip_fw3_ctl_x(struct sockopt *sopt);
 558 int     ip_fw3_ctl(struct sockopt *sopt);
 559 int     ip_fw3_ctl_sockopt(struct sockopt *sopt);
 560 int     ip_fw3_check_in(void *arg, struct mbuf **m0, struct ifnet *ifp, int dir);
 561 int     ip_fw3_check_out(void *arg, struct mbuf **m0, struct ifnet *ifp, int dir);
 562 void    ip_fw3_hook(void);
 563 void    ip_fw3_dehook(void);
 564 void    ip_fw3_sysctl_enable_dispatch(netmsg_t nmsg);
 565 void    ctx_init_dispatch(netmsg_t nmsg);
 566 void    init_dispatch(netmsg_t nmsg);
 567 int     ip_fw3_init(void);
 568 void    fini_dispatch(netmsg_t nmsg);
 569 int     ip_fw3_fini(void);
 570
 571 #endif /* _KERNEL */
 572 #endif /* _IPFW2_H */
 573 #endif /* _IP_FW3_H_ */