The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_fw.h

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    1 /*-
    2  * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  *
   25  * $FreeBSD: releng/11.1/sys/netinet/ip_fw.h 317043 2017-04-17 09:36:35Z ae $
   26  */
   27 
   28 #ifndef _IPFW2_H
   29 #define _IPFW2_H
   30 
   31 /*
   32  * The default rule number.  By the design of ip_fw, the default rule
   33  * is the last one, so its number can also serve as the highest number
   34  * allowed for a rule.  The ip_fw code relies on both meanings of this
   35  * constant. 
   36  */
   37 #define IPFW_DEFAULT_RULE       65535
   38 
   39 #define RESVD_SET               31      /*set for default and persistent rules*/
   40 #define IPFW_MAX_SETS           32      /* Number of sets supported by ipfw*/
   41 
   42 /*
   43  * Compat values for old clients
   44  */
   45 #ifndef _KERNEL
   46 #define IPFW_TABLES_MAX         65535
   47 #define IPFW_TABLES_DEFAULT     128
   48 #endif
   49 
   50 /*
   51  * Most commands (queue, pipe, tag, untag, limit...) can have a 16-bit
   52  * argument between 1 and 65534. The value 0 (IP_FW_TARG) is used
   53  * to represent 'tablearg' value, e.g.  indicate the use of a 'tablearg'
   54  * result of the most recent table() lookup.
   55  * Note that 16bit is only a historical limit, resulting from
   56  * the use of a 16-bit fields for that value. In reality, we can have
   57  * 2^32 pipes, queues, tag values and so on.
   58  */
   59 #define IPFW_ARG_MIN            1
   60 #define IPFW_ARG_MAX            65534
   61 #define IP_FW_TABLEARG          65535   /* Compat value for old clients */
   62 #define IP_FW_TARG              0       /* Current tablearg value */
   63 #define IP_FW_NAT44_GLOBAL      65535   /* arg1 value for "nat global" */
   64 
   65 /*
   66  * Number of entries in the call stack of the call/return commands.
   67  * Call stack currently is an uint16_t array with rule numbers.
   68  */
   69 #define IPFW_CALLSTACK_SIZE     16
   70 
   71 /* IP_FW3 header/opcodes */
   72 typedef struct _ip_fw3_opheader {
   73         uint16_t opcode;        /* Operation opcode */
   74         uint16_t version;       /* Opcode version */
   75         uint16_t reserved[2];   /* Align to 64-bit boundary */
   76 } ip_fw3_opheader;
   77 
   78 /* IP_FW3 opcodes */
   79 #define IP_FW_TABLE_XADD        86      /* add entry */
   80 #define IP_FW_TABLE_XDEL        87      /* delete entry */
   81 #define IP_FW_TABLE_XGETSIZE    88      /* get table size (deprecated) */
   82 #define IP_FW_TABLE_XLIST       89      /* list table contents */
   83 #define IP_FW_TABLE_XDESTROY    90      /* destroy table */
   84 #define IP_FW_TABLES_XLIST      92      /* list all tables  */
   85 #define IP_FW_TABLE_XINFO       93      /* request info for one table */
   86 #define IP_FW_TABLE_XFLUSH      94      /* flush table data */
   87 #define IP_FW_TABLE_XCREATE     95      /* create new table  */
   88 #define IP_FW_TABLE_XMODIFY     96      /* modify existing table */
   89 #define IP_FW_XGET              97      /* Retrieve configuration */
   90 #define IP_FW_XADD              98      /* add rule */
   91 #define IP_FW_XDEL              99      /* del rule */
   92 #define IP_FW_XMOVE             100     /* move rules to different set  */
   93 #define IP_FW_XZERO             101     /* clear accounting */
   94 #define IP_FW_XRESETLOG         102     /* zero rules logs */
   95 #define IP_FW_SET_SWAP          103     /* Swap between 2 sets */
   96 #define IP_FW_SET_MOVE          104     /* Move one set to another one */
   97 #define IP_FW_SET_ENABLE        105     /* Enable/disable sets */
   98 #define IP_FW_TABLE_XFIND       106     /* finds an entry */
   99 #define IP_FW_XIFLIST           107     /* list tracked interfaces */
  100 #define IP_FW_TABLES_ALIST      108     /* list table algorithms */
  101 #define IP_FW_TABLE_XSWAP       109     /* swap two tables */
  102 #define IP_FW_TABLE_VLIST       110     /* dump table value hash */
  103 
  104 #define IP_FW_NAT44_XCONFIG     111     /* Create/modify NAT44 instance */
  105 #define IP_FW_NAT44_DESTROY     112     /* Destroys NAT44 instance */
  106 #define IP_FW_NAT44_XGETCONFIG  113     /* Get NAT44 instance config */
  107 #define IP_FW_NAT44_LIST_NAT    114     /* List all NAT44 instances */
  108 #define IP_FW_NAT44_XGETLOG     115     /* Get log from NAT44 instance */
  109 
  110 #define IP_FW_DUMP_SOPTCODES    116     /* Dump available sopts/versions */
  111 #define IP_FW_DUMP_SRVOBJECTS   117     /* Dump existing named objects */
  112 
  113 #define IP_FW_NAT64STL_CREATE   130     /* Create stateless NAT64 instance */
  114 #define IP_FW_NAT64STL_DESTROY  131     /* Destroy stateless NAT64 instance */
  115 #define IP_FW_NAT64STL_CONFIG   132     /* Modify stateless NAT64 instance */
  116 #define IP_FW_NAT64STL_LIST     133     /* List stateless NAT64 instances */
  117 #define IP_FW_NAT64STL_STATS    134     /* Get NAT64STL instance statistics */
  118 #define IP_FW_NAT64STL_RESET_STATS 135  /* Reset NAT64STL instance statistics */
  119 
  120 #define IP_FW_NAT64LSN_CREATE   140     /* Create stateful NAT64 instance */
  121 #define IP_FW_NAT64LSN_DESTROY  141     /* Destroy stateful NAT64 instance */
  122 #define IP_FW_NAT64LSN_CONFIG   142     /* Modify stateful NAT64 instance */
  123 #define IP_FW_NAT64LSN_LIST     143     /* List stateful NAT64 instances */
  124 #define IP_FW_NAT64LSN_STATS    144     /* Get NAT64LSN instance statistics */
  125 #define IP_FW_NAT64LSN_LIST_STATES 145  /* Get stateful NAT64 states */
  126 #define IP_FW_NAT64LSN_RESET_STATS 146  /* Reset NAT64LSN instance statistics */
  127 
  128 #define IP_FW_NPTV6_CREATE      150     /* Create NPTv6 instance */
  129 #define IP_FW_NPTV6_DESTROY     151     /* Destroy NPTv6 instance */
  130 #define IP_FW_NPTV6_CONFIG      152     /* Modify NPTv6 instance */
  131 #define IP_FW_NPTV6_LIST        153     /* List NPTv6 instances */
  132 #define IP_FW_NPTV6_STATS       154     /* Get NPTv6 instance statistics */
  133 #define IP_FW_NPTV6_RESET_STATS 155     /* Reset NPTv6 instance statistics */
  134 
  135 /*
  136  * The kernel representation of ipfw rules is made of a list of
  137  * 'instructions' (for all practical purposes equivalent to BPF
  138  * instructions), which specify which fields of the packet
  139  * (or its metadata) should be analysed.
  140  *
  141  * Each instruction is stored in a structure which begins with
  142  * "ipfw_insn", and can contain extra fields depending on the
  143  * instruction type (listed below).
  144  * Note that the code is written so that individual instructions
  145  * have a size which is a multiple of 32 bits. This means that, if
  146  * such structures contain pointers or other 64-bit entities,
  147  * (there is just one instance now) they may end up unaligned on
  148  * 64-bit architectures, so the must be handled with care.
  149  *
  150  * "enum ipfw_opcodes" are the opcodes supported. We can have up
  151  * to 256 different opcodes. When adding new opcodes, they should
  152  * be appended to the end of the opcode list before O_LAST_OPCODE,
  153  * this will prevent the ABI from being broken, otherwise users
  154  * will have to recompile ipfw(8) when they update the kernel.
  155  */
  156 
  157 enum ipfw_opcodes {             /* arguments (4 byte each)      */
  158         O_NOP,
  159 
  160         O_IP_SRC,               /* u32 = IP                     */
  161         O_IP_SRC_MASK,          /* ip = IP/mask                 */
  162         O_IP_SRC_ME,            /* none                         */
  163         O_IP_SRC_SET,           /* u32=base, arg1=len, bitmap   */
  164 
  165         O_IP_DST,               /* u32 = IP                     */
  166         O_IP_DST_MASK,          /* ip = IP/mask                 */
  167         O_IP_DST_ME,            /* none                         */
  168         O_IP_DST_SET,           /* u32=base, arg1=len, bitmap   */
  169 
  170         O_IP_SRCPORT,           /* (n)port list:mask 4 byte ea  */
  171         O_IP_DSTPORT,           /* (n)port list:mask 4 byte ea  */
  172         O_PROTO,                /* arg1=protocol                */
  173 
  174         O_MACADDR2,             /* 2 mac addr:mask              */
  175         O_MAC_TYPE,             /* same as srcport              */
  176 
  177         O_LAYER2,               /* none                         */
  178         O_IN,                   /* none                         */
  179         O_FRAG,                 /* none                         */
  180 
  181         O_RECV,                 /* none                         */
  182         O_XMIT,                 /* none                         */
  183         O_VIA,                  /* none                         */
  184 
  185         O_IPOPT,                /* arg1 = 2*u8 bitmap           */
  186         O_IPLEN,                /* arg1 = len                   */
  187         O_IPID,                 /* arg1 = id                    */
  188 
  189         O_IPTOS,                /* arg1 = id                    */
  190         O_IPPRECEDENCE,         /* arg1 = precedence << 5       */
  191         O_IPTTL,                /* arg1 = TTL                   */
  192 
  193         O_IPVER,                /* arg1 = version               */
  194         O_UID,                  /* u32 = id                     */
  195         O_GID,                  /* u32 = id                     */
  196         O_ESTAB,                /* none (tcp established)       */
  197         O_TCPFLAGS,             /* arg1 = 2*u8 bitmap           */
  198         O_TCPWIN,               /* arg1 = desired win           */
  199         O_TCPSEQ,               /* u32 = desired seq.           */
  200         O_TCPACK,               /* u32 = desired seq.           */
  201         O_ICMPTYPE,             /* u32 = icmp bitmap            */
  202         O_TCPOPTS,              /* arg1 = 2*u8 bitmap           */
  203 
  204         O_VERREVPATH,           /* none                         */
  205         O_VERSRCREACH,          /* none                         */
  206 
  207         O_PROBE_STATE,          /* none                         */
  208         O_KEEP_STATE,           /* none                         */
  209         O_LIMIT,                /* ipfw_insn_limit              */
  210         O_LIMIT_PARENT,         /* dyn_type, not an opcode.     */
  211 
  212         /*
  213          * These are really 'actions'.
  214          */
  215 
  216         O_LOG,                  /* ipfw_insn_log                */
  217         O_PROB,                 /* u32 = match probability      */
  218 
  219         O_CHECK_STATE,          /* none                         */
  220         O_ACCEPT,               /* none                         */
  221         O_DENY,                 /* none                         */
  222         O_REJECT,               /* arg1=icmp arg (same as deny) */
  223         O_COUNT,                /* none                         */
  224         O_SKIPTO,               /* arg1=next rule number        */
  225         O_PIPE,                 /* arg1=pipe number             */
  226         O_QUEUE,                /* arg1=queue number            */
  227         O_DIVERT,               /* arg1=port number             */
  228         O_TEE,                  /* arg1=port number             */
  229         O_FORWARD_IP,           /* fwd sockaddr                 */
  230         O_FORWARD_MAC,          /* fwd mac                      */
  231         O_NAT,                  /* nope                         */
  232         O_REASS,                /* none                         */
  233         
  234         /*
  235          * More opcodes.
  236          */
  237         O_IPSEC,                /* has ipsec history            */
  238         O_IP_SRC_LOOKUP,        /* arg1=table number, u32=value */
  239         O_IP_DST_LOOKUP,        /* arg1=table number, u32=value */
  240         O_ANTISPOOF,            /* none                         */
  241         O_JAIL,                 /* u32 = id                     */
  242         O_ALTQ,                 /* u32 = altq classif. qid      */
  243         O_DIVERTED,             /* arg1=bitmap (1:loop, 2:out)  */
  244         O_TCPDATALEN,           /* arg1 = tcp data len          */
  245         O_IP6_SRC,              /* address without mask         */
  246         O_IP6_SRC_ME,           /* my addresses                 */
  247         O_IP6_SRC_MASK,         /* address with the mask        */
  248         O_IP6_DST,
  249         O_IP6_DST_ME,
  250         O_IP6_DST_MASK,
  251         O_FLOW6ID,              /* for flow id tag in the ipv6 pkt */
  252         O_ICMP6TYPE,            /* icmp6 packet type filtering  */
  253         O_EXT_HDR,              /* filtering for ipv6 extension header */
  254         O_IP6,
  255 
  256         /*
  257          * actions for ng_ipfw
  258          */
  259         O_NETGRAPH,             /* send to ng_ipfw              */
  260         O_NGTEE,                /* copy to ng_ipfw              */
  261 
  262         O_IP4,
  263 
  264         O_UNREACH6,             /* arg1=icmpv6 code arg (deny)  */
  265 
  266         O_TAG,                  /* arg1=tag number */
  267         O_TAGGED,               /* arg1=tag number */
  268 
  269         O_SETFIB,               /* arg1=FIB number */
  270         O_FIB,                  /* arg1=FIB desired fib number */
  271         
  272         O_SOCKARG,              /* socket argument */
  273 
  274         O_CALLRETURN,           /* arg1=called rule number */
  275 
  276         O_FORWARD_IP6,          /* fwd sockaddr_in6             */
  277 
  278         O_DSCP,                 /* 2 u32 = DSCP mask */
  279         O_SETDSCP,              /* arg1=DSCP value */
  280         O_IP_FLOW_LOOKUP,       /* arg1=table number, u32=value */
  281 
  282         O_EXTERNAL_ACTION,      /* arg1=id of external action handler */
  283         O_EXTERNAL_INSTANCE,    /* arg1=id of eaction handler instance */
  284         O_EXTERNAL_DATA,        /* variable length data */
  285 
  286         O_LAST_OPCODE           /* not an opcode!               */
  287 };
  288 
  289 /*
  290  * The extension header are filtered only for presence using a bit
  291  * vector with a flag for each header.
  292  */
  293 #define EXT_FRAGMENT    0x1
  294 #define EXT_HOPOPTS     0x2
  295 #define EXT_ROUTING     0x4
  296 #define EXT_AH          0x8
  297 #define EXT_ESP         0x10
  298 #define EXT_DSTOPTS     0x20
  299 #define EXT_RTHDR0              0x40
  300 #define EXT_RTHDR2              0x80
  301 
  302 /*
  303  * Template for instructions.
  304  *
  305  * ipfw_insn is used for all instructions which require no operands,
  306  * a single 16-bit value (arg1), or a couple of 8-bit values.
  307  *
  308  * For other instructions which require different/larger arguments
  309  * we have derived structures, ipfw_insn_*.
  310  *
  311  * The size of the instruction (in 32-bit words) is in the low
  312  * 6 bits of "len". The 2 remaining bits are used to implement
  313  * NOT and OR on individual instructions. Given a type, you can
  314  * compute the length to be put in "len" using F_INSN_SIZE(t)
  315  *
  316  * F_NOT        negates the match result of the instruction.
  317  *
  318  * F_OR         is used to build or blocks. By default, instructions
  319  *              are evaluated as part of a logical AND. An "or" block
  320  *              { X or Y or Z } contains F_OR set in all but the last
  321  *              instruction of the block. A match will cause the code
  322  *              to skip past the last instruction of the block.
  323  *
  324  * NOTA BENE: in a couple of places we assume that
  325  *      sizeof(ipfw_insn) == sizeof(u_int32_t)
  326  * this needs to be fixed.
  327  *
  328  */
  329 typedef struct  _ipfw_insn {    /* template for instructions */
  330         u_int8_t        opcode;
  331         u_int8_t        len;    /* number of 32-bit words */
  332 #define F_NOT           0x80
  333 #define F_OR            0x40
  334 #define F_LEN_MASK      0x3f
  335 #define F_LEN(cmd)      ((cmd)->len & F_LEN_MASK)
  336 
  337         u_int16_t       arg1;
  338 } ipfw_insn;
  339 
  340 /*
  341  * The F_INSN_SIZE(type) computes the size, in 4-byte words, of
  342  * a given type.
  343  */
  344 #define F_INSN_SIZE(t)  ((sizeof (t))/sizeof(u_int32_t))
  345 
  346 /*
  347  * This is used to store an array of 16-bit entries (ports etc.)
  348  */
  349 typedef struct  _ipfw_insn_u16 {
  350         ipfw_insn o;
  351         u_int16_t ports[2];     /* there may be more */
  352 } ipfw_insn_u16;
  353 
  354 /*
  355  * This is used to store an array of 32-bit entries
  356  * (uid, single IPv4 addresses etc.)
  357  */
  358 typedef struct  _ipfw_insn_u32 {
  359         ipfw_insn o;
  360         u_int32_t d[1]; /* one or more */
  361 } ipfw_insn_u32;
  362 
  363 /*
  364  * This is used to store IP addr-mask pairs.
  365  */
  366 typedef struct  _ipfw_insn_ip {
  367         ipfw_insn o;
  368         struct in_addr  addr;
  369         struct in_addr  mask;
  370 } ipfw_insn_ip;
  371 
  372 /*
  373  * This is used to forward to a given address (ip).
  374  */
  375 typedef struct  _ipfw_insn_sa {
  376         ipfw_insn o;
  377         struct sockaddr_in sa;
  378 } ipfw_insn_sa;
  379 
  380 /*
  381  * This is used to forward to a given address (ipv6).
  382  */
  383 typedef struct _ipfw_insn_sa6 {
  384         ipfw_insn o;
  385         struct sockaddr_in6 sa;
  386 } ipfw_insn_sa6;
  387 
  388 /*
  389  * This is used for MAC addr-mask pairs.
  390  */
  391 typedef struct  _ipfw_insn_mac {
  392         ipfw_insn o;
  393         u_char addr[12];        /* dst[6] + src[6] */
  394         u_char mask[12];        /* dst[6] + src[6] */
  395 } ipfw_insn_mac;
  396 
  397 /*
  398  * This is used for interface match rules (recv xx, xmit xx).
  399  */
  400 typedef struct  _ipfw_insn_if {
  401         ipfw_insn o;
  402         union {
  403                 struct in_addr ip;
  404                 int glob;
  405                 uint16_t kidx;
  406         } p;
  407         char name[IFNAMSIZ];
  408 } ipfw_insn_if;
  409 
  410 /*
  411  * This is used for storing an altq queue id number.
  412  */
  413 typedef struct _ipfw_insn_altq {
  414         ipfw_insn       o;
  415         u_int32_t       qid;
  416 } ipfw_insn_altq;
  417 
  418 /*
  419  * This is used for limit rules.
  420  */
  421 typedef struct  _ipfw_insn_limit {
  422         ipfw_insn o;
  423         u_int8_t _pad;
  424         u_int8_t limit_mask;    /* combination of DYN_* below   */
  425 #define DYN_SRC_ADDR    0x1
  426 #define DYN_SRC_PORT    0x2
  427 #define DYN_DST_ADDR    0x4
  428 #define DYN_DST_PORT    0x8
  429 
  430         u_int16_t conn_limit;
  431 } ipfw_insn_limit;
  432 
  433 /*
  434  * This is used for log instructions.
  435  */
  436 typedef struct  _ipfw_insn_log {
  437         ipfw_insn o;
  438         u_int32_t max_log;      /* how many do we log -- 0 = all */
  439         u_int32_t log_left;     /* how many left to log         */
  440 } ipfw_insn_log;
  441 
  442 /* Legacy NAT structures, compat only */
  443 #ifndef _KERNEL
  444 /*
  445  * Data structures required by both ipfw(8) and ipfw(4) but not part of the
  446  * management API are protected by IPFW_INTERNAL.
  447  */
  448 #ifdef IPFW_INTERNAL
  449 /* Server pool support (LSNAT). */
  450 struct cfg_spool {
  451         LIST_ENTRY(cfg_spool)   _next;          /* chain of spool instances */
  452         struct in_addr          addr;
  453         u_short                 port;
  454 };
  455 #endif
  456 
  457 /* Redirect modes id. */
  458 #define REDIR_ADDR      0x01
  459 #define REDIR_PORT      0x02
  460 #define REDIR_PROTO     0x04
  461 
  462 #ifdef IPFW_INTERNAL
  463 /* Nat redirect configuration. */
  464 struct cfg_redir {
  465         LIST_ENTRY(cfg_redir)   _next;          /* chain of redir instances */
  466         u_int16_t               mode;           /* type of redirect mode */
  467         struct in_addr          laddr;          /* local ip address */
  468         struct in_addr          paddr;          /* public ip address */
  469         struct in_addr          raddr;          /* remote ip address */
  470         u_short                 lport;          /* local port */
  471         u_short                 pport;          /* public port */
  472         u_short                 rport;          /* remote port  */
  473         u_short                 pport_cnt;      /* number of public ports */
  474         u_short                 rport_cnt;      /* number of remote ports */
  475         int                     proto;          /* protocol: tcp/udp */
  476         struct alias_link       **alink;        
  477         /* num of entry in spool chain */
  478         u_int16_t               spool_cnt;      
  479         /* chain of spool instances */
  480         LIST_HEAD(spool_chain, cfg_spool) spool_chain;
  481 };
  482 #endif
  483 
  484 #ifdef IPFW_INTERNAL
  485 /* Nat configuration data struct. */
  486 struct cfg_nat {
  487         /* chain of nat instances */
  488         LIST_ENTRY(cfg_nat)     _next;
  489         int                     id;                     /* nat id */
  490         struct in_addr          ip;                     /* nat ip address */
  491         char                    if_name[IF_NAMESIZE];   /* interface name */
  492         int                     mode;                   /* aliasing mode */
  493         struct libalias         *lib;                   /* libalias instance */
  494         /* number of entry in spool chain */
  495         int                     redir_cnt;              
  496         /* chain of redir instances */
  497         LIST_HEAD(redir_chain, cfg_redir) redir_chain;  
  498 };
  499 #endif
  500 
  501 #define SOF_NAT         sizeof(struct cfg_nat)
  502 #define SOF_REDIR       sizeof(struct cfg_redir)
  503 #define SOF_SPOOL       sizeof(struct cfg_spool)
  504 
  505 #endif  /* ifndef _KERNEL */
  506 
  507 
  508 struct nat44_cfg_spool {
  509         struct in_addr  addr;
  510         uint16_t        port;
  511         uint16_t        spare;
  512 };
  513 #define NAT44_REDIR_ADDR        0x01
  514 #define NAT44_REDIR_PORT        0x02
  515 #define NAT44_REDIR_PROTO       0x04
  516 
  517 /* Nat redirect configuration. */
  518 struct nat44_cfg_redir {
  519         struct in_addr  laddr;          /* local ip address */
  520         struct in_addr  paddr;          /* public ip address */
  521         struct in_addr  raddr;          /* remote ip address */
  522         uint16_t        lport;          /* local port */
  523         uint16_t        pport;          /* public port */
  524         uint16_t        rport;          /* remote port  */
  525         uint16_t        pport_cnt;      /* number of public ports */
  526         uint16_t        rport_cnt;      /* number of remote ports */
  527         uint16_t        mode;           /* type of redirect mode */
  528         uint16_t        spool_cnt;      /* num of entry in spool chain */ 
  529         uint16_t        spare;
  530         uint32_t        proto;          /* protocol: tcp/udp */
  531 };
  532 
  533 /* Nat configuration data struct. */
  534 struct nat44_cfg_nat {
  535         char            name[64];       /* nat name */
  536         char            if_name[64];    /* interface name */
  537         uint32_t        size;           /* structure size incl. redirs */
  538         struct in_addr  ip;             /* nat IPv4 address */
  539         uint32_t        mode;           /* aliasing mode */
  540         uint32_t        redir_cnt;      /* number of entry in spool chain */
  541 };
  542 
  543 /* Nat command. */
  544 typedef struct  _ipfw_insn_nat {
  545         ipfw_insn       o;
  546         struct cfg_nat *nat;    
  547 } ipfw_insn_nat;
  548 
  549 /* Apply ipv6 mask on ipv6 addr */
  550 #define APPLY_MASK(addr,mask)                          \
  551     (addr)->__u6_addr.__u6_addr32[0] &= (mask)->__u6_addr.__u6_addr32[0]; \
  552     (addr)->__u6_addr.__u6_addr32[1] &= (mask)->__u6_addr.__u6_addr32[1]; \
  553     (addr)->__u6_addr.__u6_addr32[2] &= (mask)->__u6_addr.__u6_addr32[2]; \
  554     (addr)->__u6_addr.__u6_addr32[3] &= (mask)->__u6_addr.__u6_addr32[3];
  555 
  556 /* Structure for ipv6 */
  557 typedef struct _ipfw_insn_ip6 {
  558        ipfw_insn o;
  559        struct in6_addr addr6;
  560        struct in6_addr mask6;
  561 } ipfw_insn_ip6;
  562 
  563 /* Used to support icmp6 types */
  564 typedef struct _ipfw_insn_icmp6 {
  565        ipfw_insn o;
  566        uint32_t d[7]; /* XXX This number si related to the netinet/icmp6.h
  567                        *     define ICMP6_MAXTYPE
  568                        *     as follows: n = ICMP6_MAXTYPE/32 + 1
  569                         *     Actually is 203 
  570                        */
  571 } ipfw_insn_icmp6;
  572 
  573 /*
  574  * Here we have the structure representing an ipfw rule.
  575  *
  576  * Layout:
  577  * struct ip_fw_rule
  578  * [ counter block, size = rule->cntr_len ]
  579  * [ one or more instructions, size = rule->cmd_len * 4 ]
  580  *
  581  * It starts with a general area (with link fields).
  582  * Counter block may be next (if rule->cntr_len > 0),
  583  * followed by an array of one or more instructions, which the code
  584  * accesses as an array of 32-bit values. rule->cmd_len represents
  585  * the total instructions legth in u32 worrd, while act_ofs represents
  586  * rule action offset in u32 words.
  587  *
  588  * When assembling instruction, remember the following:
  589  *
  590  *  + if a rule has a "keep-state" (or "limit") option, then the
  591  *      first instruction (at r->cmd) MUST BE an O_PROBE_STATE
  592  *  + if a rule has a "log" option, then the first action
  593  *      (at ACTION_PTR(r)) MUST be O_LOG
  594  *  + if a rule has an "altq" option, it comes after "log"
  595  *  + if a rule has an O_TAG option, it comes after "log" and "altq"
  596  *
  597  *
  598  * All structures (excluding instructions) are u64-aligned.
  599  * Please keep this.
  600  */
  601 
  602 struct ip_fw_rule {
  603         uint16_t        act_ofs;        /* offset of action in 32-bit units */
  604         uint16_t        cmd_len;        /* # of 32-bit words in cmd     */
  605         uint16_t        spare;
  606         uint8_t         set;            /* rule set (0..31)             */
  607         uint8_t         flags;          /* rule flags                   */
  608         uint32_t        rulenum;        /* rule number                  */
  609         uint32_t        id;             /* rule id                      */
  610 
  611         ipfw_insn       cmd[1];         /* storage for commands         */
  612 };
  613 #define IPFW_RULE_NOOPT         0x01    /* Has no options in body       */
  614 
  615 /* Unaligned version */
  616 
  617 /* Base ipfw rule counter block. */
  618 struct ip_fw_bcounter {
  619         uint16_t        size;           /* Size of counter block, bytes */
  620         uint8_t         flags;          /* flags for given block        */
  621         uint8_t         spare;
  622         uint32_t        timestamp;      /* tv_sec of last match         */
  623         uint64_t        pcnt;           /* Packet counter               */
  624         uint64_t        bcnt;           /* Byte counter                 */
  625 };
  626 
  627 
  628 #ifndef _KERNEL
  629 /*
  630  * Legacy rule format
  631  */
  632 struct ip_fw {
  633         struct ip_fw    *x_next;        /* linked list of rules         */
  634         struct ip_fw    *next_rule;     /* ptr to next [skipto] rule    */
  635         /* 'next_rule' is used to pass up 'set_disable' status          */
  636 
  637         uint16_t        act_ofs;        /* offset of action in 32-bit units */
  638         uint16_t        cmd_len;        /* # of 32-bit words in cmd     */
  639         uint16_t        rulenum;        /* rule number                  */
  640         uint8_t         set;            /* rule set (0..31)             */
  641         uint8_t         _pad;           /* padding                      */
  642         uint32_t        id;             /* rule id */
  643 
  644         /* These fields are present in all rules.                       */
  645         uint64_t        pcnt;           /* Packet counter               */
  646         uint64_t        bcnt;           /* Byte counter                 */
  647         uint32_t        timestamp;      /* tv_sec of last match         */
  648 
  649         ipfw_insn       cmd[1];         /* storage for commands         */
  650 };
  651 #endif
  652 
  653 #define ACTION_PTR(rule)                                \
  654         (ipfw_insn *)( (u_int32_t *)((rule)->cmd) + ((rule)->act_ofs) )
  655 
  656 #define RULESIZE(rule)  (sizeof(*(rule)) + (rule)->cmd_len * 4 - 4)
  657 
  658 
  659 #if 1 // should be moved to in.h
  660 /*
  661  * This structure is used as a flow mask and a flow id for various
  662  * parts of the code.
  663  * addr_type is used in userland and kernel to mark the address type.
  664  * fib is used in the kernel to record the fib in use.
  665  * _flags is used in the kernel to store tcp flags for dynamic rules.
  666  */
  667 struct ipfw_flow_id {
  668         uint32_t        dst_ip;
  669         uint32_t        src_ip;
  670         uint16_t        dst_port;
  671         uint16_t        src_port;
  672         uint8_t         fib;
  673         uint8_t         proto;
  674         uint8_t         _flags; /* protocol-specific flags */
  675         uint8_t         addr_type; /* 4=ip4, 6=ip6, 1=ether ? */
  676         struct in6_addr dst_ip6;
  677         struct in6_addr src_ip6;
  678         uint32_t        flow_id6;
  679         uint32_t        extra; /* queue/pipe or frag_id */
  680 };
  681 #endif
  682 
  683 #define IS_IP6_FLOW_ID(id)      ((id)->addr_type == 6)
  684 
  685 /*
  686  * Dynamic ipfw rule.
  687  */
  688 typedef struct _ipfw_dyn_rule ipfw_dyn_rule;
  689 
  690 struct _ipfw_dyn_rule {
  691         ipfw_dyn_rule   *next;          /* linked list of rules.        */
  692         struct ip_fw *rule;             /* pointer to rule              */
  693         /* 'rule' is used to pass up the rule number (from the parent)  */
  694 
  695         ipfw_dyn_rule *parent;          /* pointer to parent rule       */
  696         u_int64_t       pcnt;           /* packet match counter         */
  697         u_int64_t       bcnt;           /* byte match counter           */
  698         struct ipfw_flow_id id;         /* (masked) flow id             */
  699         u_int32_t       expire;         /* expire time                  */
  700         u_int32_t       bucket;         /* which bucket in hash table   */
  701         u_int32_t       state;          /* state of this rule (typically a
  702                                          * combination of TCP flags)
  703                                          */
  704         u_int32_t       ack_fwd;        /* most recent ACKs in forward  */
  705         u_int32_t       ack_rev;        /* and reverse directions (used */
  706                                         /* to generate keepalives)      */
  707         u_int16_t       dyn_type;       /* rule type                    */
  708         u_int16_t       count;          /* refcount                     */
  709         u_int16_t       kidx;           /* index of named object */
  710 } __packed __aligned(8);
  711 
  712 /*
  713  * Definitions for IP option names.
  714  */
  715 #define IP_FW_IPOPT_LSRR        0x01
  716 #define IP_FW_IPOPT_SSRR        0x02
  717 #define IP_FW_IPOPT_RR          0x04
  718 #define IP_FW_IPOPT_TS          0x08
  719 
  720 /*
  721  * Definitions for TCP option names.
  722  */
  723 #define IP_FW_TCPOPT_MSS        0x01
  724 #define IP_FW_TCPOPT_WINDOW     0x02
  725 #define IP_FW_TCPOPT_SACK       0x04
  726 #define IP_FW_TCPOPT_TS         0x08
  727 #define IP_FW_TCPOPT_CC         0x10
  728 
  729 #define ICMP_REJECT_RST         0x100   /* fake ICMP code (send a TCP RST) */
  730 #define ICMP6_UNREACH_RST       0x100   /* fake ICMPv6 code (send a TCP RST) */
  731 
  732 /*
  733  * These are used for lookup tables.
  734  */
  735 
  736 #define IPFW_TABLE_ADDR         1       /* Table for holding IPv4/IPv6 prefixes */
  737 #define IPFW_TABLE_INTERFACE    2       /* Table for holding interface names */
  738 #define IPFW_TABLE_NUMBER       3       /* Table for holding ports/uid/gid/etc */
  739 #define IPFW_TABLE_FLOW         4       /* Table for holding flow data */
  740 #define IPFW_TABLE_MAXTYPE      4       /* Maximum valid number */
  741 
  742 #define IPFW_TABLE_CIDR IPFW_TABLE_ADDR /* compat */
  743 
  744 /* Value types */
  745 #define IPFW_VTYPE_LEGACY       0xFFFFFFFF      /* All data is filled in */
  746 #define IPFW_VTYPE_SKIPTO       0x00000001      /* skipto/call/callreturn */
  747 #define IPFW_VTYPE_PIPE         0x00000002      /* pipe/queue */
  748 #define IPFW_VTYPE_FIB          0x00000004      /* setfib */
  749 #define IPFW_VTYPE_NAT          0x00000008      /* nat */
  750 #define IPFW_VTYPE_DSCP         0x00000010      /* dscp */
  751 #define IPFW_VTYPE_TAG          0x00000020      /* tag/untag */
  752 #define IPFW_VTYPE_DIVERT       0x00000040      /* divert/tee */
  753 #define IPFW_VTYPE_NETGRAPH     0x00000080      /* netgraph/ngtee */
  754 #define IPFW_VTYPE_LIMIT        0x00000100      /* limit */
  755 #define IPFW_VTYPE_NH4          0x00000200      /* IPv4 nexthop */
  756 #define IPFW_VTYPE_NH6          0x00000400      /* IPv6 nexthop */
  757 
  758 typedef struct  _ipfw_table_entry {
  759         in_addr_t       addr;           /* network address              */
  760         u_int32_t       value;          /* value                        */
  761         u_int16_t       tbl;            /* table number                 */
  762         u_int8_t        masklen;        /* mask length                  */
  763 } ipfw_table_entry;
  764 
  765 typedef struct  _ipfw_table_xentry {
  766         uint16_t        len;            /* Total entry length           */
  767         uint8_t         type;           /* entry type                   */
  768         uint8_t         masklen;        /* mask length                  */
  769         uint16_t        tbl;            /* table number                 */
  770         uint16_t        flags;          /* record flags                 */
  771         uint32_t        value;          /* value                        */
  772         union {
  773                 /* Longest field needs to be aligned by 4-byte boundary */
  774                 struct in6_addr addr6;  /* IPv6 address                 */
  775                 char    iface[IF_NAMESIZE];     /* interface name       */
  776         } k;
  777 } ipfw_table_xentry;
  778 #define IPFW_TCF_INET   0x01            /* CIDR flags: IPv4 record      */
  779 
  780 typedef struct  _ipfw_table {
  781         u_int32_t       size;           /* size of entries in bytes     */
  782         u_int32_t       cnt;            /* # of entries                 */
  783         u_int16_t       tbl;            /* table number                 */
  784         ipfw_table_entry ent[0];        /* entries                      */
  785 } ipfw_table;
  786 
  787 typedef struct  _ipfw_xtable {
  788         ip_fw3_opheader opheader;       /* IP_FW3 opcode */
  789         uint32_t        size;           /* size of entries in bytes     */
  790         uint32_t        cnt;            /* # of entries                 */
  791         uint16_t        tbl;            /* table number                 */
  792         uint8_t         type;           /* table type                   */
  793         ipfw_table_xentry xent[0];      /* entries                      */
  794 } ipfw_xtable;
  795 
  796 typedef struct  _ipfw_obj_tlv {
  797         uint16_t        type;           /* TLV type */
  798         uint16_t        flags;          /* TLV-specific flags           */
  799         uint32_t        length;         /* Total length, aligned to u64 */
  800 } ipfw_obj_tlv;
  801 #define IPFW_TLV_TBL_NAME       1
  802 #define IPFW_TLV_TBLNAME_LIST   2
  803 #define IPFW_TLV_RULE_LIST      3
  804 #define IPFW_TLV_DYNSTATE_LIST  4
  805 #define IPFW_TLV_TBL_ENT        5
  806 #define IPFW_TLV_DYN_ENT        6
  807 #define IPFW_TLV_RULE_ENT       7
  808 #define IPFW_TLV_TBLENT_LIST    8
  809 #define IPFW_TLV_RANGE          9
  810 #define IPFW_TLV_EACTION        10
  811 #define IPFW_TLV_COUNTERS       11
  812 #define IPFW_TLV_OBJDATA        12
  813 #define IPFW_TLV_STATE_NAME     14
  814 
  815 #define IPFW_TLV_EACTION_BASE   1000
  816 #define IPFW_TLV_EACTION_NAME(arg)      (IPFW_TLV_EACTION_BASE + (arg))
  817 
  818 typedef struct _ipfw_obj_data {
  819         ipfw_obj_tlv    head;
  820         void            *data[0];
  821 } ipfw_obj_data;
  822 
  823 /* Object name TLV */
  824 typedef struct _ipfw_obj_ntlv {
  825         ipfw_obj_tlv    head;           /* TLV header                   */
  826         uint16_t        idx;            /* Name index                   */
  827         uint8_t         set;            /* set, if applicable           */
  828         uint8_t         type;           /* object type, if applicable   */
  829         uint32_t        spare;          /* unused                       */
  830         char            name[64];       /* Null-terminated name         */
  831 } ipfw_obj_ntlv;
  832 
  833 /* IPv4/IPv6 L4 flow description */
  834 struct tflow_entry {
  835         uint8_t         af;
  836         uint8_t         proto;
  837         uint16_t        spare;
  838         uint16_t        sport;
  839         uint16_t        dport;
  840         union {
  841                 struct {
  842                         struct in_addr  sip;
  843                         struct in_addr  dip;
  844                 } a4;
  845                 struct {
  846                         struct in6_addr sip6;
  847                         struct in6_addr dip6;
  848                 } a6;
  849         } a;
  850 };
  851 
  852 typedef struct _ipfw_table_value {
  853         uint32_t        tag;            /* O_TAG/O_TAGGED */
  854         uint32_t        pipe;           /* O_PIPE/O_QUEUE */
  855         uint16_t        divert;         /* O_DIVERT/O_TEE */
  856         uint16_t        skipto;         /* skipto, CALLRET */
  857         uint32_t        netgraph;       /* O_NETGRAPH/O_NGTEE */
  858         uint32_t        fib;            /* O_SETFIB */
  859         uint32_t        nat;            /* O_NAT */
  860         uint32_t        nh4;
  861         uint8_t         dscp;
  862         uint8_t         spare0;
  863         uint16_t        spare1;
  864         struct in6_addr nh6;
  865         uint32_t        limit;          /* O_LIMIT */
  866         uint32_t        zoneid;         /* scope zone id for nh6 */
  867         uint64_t        reserved;
  868 } ipfw_table_value;
  869 
  870 /* Table entry TLV */
  871 typedef struct  _ipfw_obj_tentry {
  872         ipfw_obj_tlv    head;           /* TLV header                   */
  873         uint8_t         subtype;        /* subtype (IPv4,IPv6)          */
  874         uint8_t         masklen;        /* mask length                  */
  875         uint8_t         result;         /* request result               */
  876         uint8_t         spare0;
  877         uint16_t        idx;            /* Table name index             */
  878         uint16_t        spare1;
  879         union {
  880                 /* Longest field needs to be aligned by 8-byte boundary */
  881                 struct in_addr          addr;   /* IPv4 address         */
  882                 uint32_t                key;            /* uid/gid/port */
  883                 struct in6_addr         addr6;  /* IPv6 address         */
  884                 char    iface[IF_NAMESIZE];     /* interface name       */
  885                 struct tflow_entry      flow;   
  886         } k;
  887         union {
  888                 ipfw_table_value        value;  /* value data */
  889                 uint32_t                kidx;   /* value kernel index */
  890         } v;
  891 } ipfw_obj_tentry;
  892 #define IPFW_TF_UPDATE  0x01            /* Update record if exists      */
  893 /* Container TLV */
  894 #define IPFW_CTF_ATOMIC 0x01            /* Perform atomic operation     */
  895 /* Operation results */
  896 #define IPFW_TR_IGNORED         0       /* Entry was ignored (rollback) */
  897 #define IPFW_TR_ADDED           1       /* Entry was successfully added */
  898 #define IPFW_TR_UPDATED         2       /* Entry was successfully updated*/
  899 #define IPFW_TR_DELETED         3       /* Entry was successfully deleted*/
  900 #define IPFW_TR_LIMIT           4       /* Entry was ignored (limit)    */
  901 #define IPFW_TR_NOTFOUND        5       /* Entry was not found          */
  902 #define IPFW_TR_EXISTS          6       /* Entry already exists         */
  903 #define IPFW_TR_ERROR           7       /* Request has failed (unknown) */
  904 
  905 typedef struct _ipfw_obj_dyntlv {
  906         ipfw_obj_tlv    head;
  907         ipfw_dyn_rule   state;
  908 } ipfw_obj_dyntlv;
  909 #define IPFW_DF_LAST    0x01            /* Last state in chain          */
  910 
  911 /* Containter TLVs */
  912 typedef struct _ipfw_obj_ctlv {
  913         ipfw_obj_tlv    head;           /* TLV header                   */
  914         uint32_t        count;          /* Number of sub-TLVs           */
  915         uint16_t        objsize;        /* Single object size           */
  916         uint8_t         version;        /* TLV version                  */
  917         uint8_t         flags;          /* TLV-specific flags           */
  918 } ipfw_obj_ctlv;
  919 
  920 /* Range TLV */
  921 typedef struct _ipfw_range_tlv {
  922         ipfw_obj_tlv    head;           /* TLV header                   */
  923         uint32_t        flags;          /* Range flags                  */
  924         uint16_t        start_rule;     /* Range start                  */
  925         uint16_t        end_rule;       /* Range end                    */
  926         uint32_t        set;            /* Range set to match            */
  927         uint32_t        new_set;        /* New set to move/swap to      */
  928 } ipfw_range_tlv;
  929 #define IPFW_RCFLAG_RANGE       0x01    /* rule range is set            */
  930 #define IPFW_RCFLAG_ALL         0x02    /* match ALL rules              */
  931 #define IPFW_RCFLAG_SET         0x04    /* match rules in given set     */
  932 /* User-settable flags */
  933 #define IPFW_RCFLAG_USER        (IPFW_RCFLAG_RANGE | IPFW_RCFLAG_ALL | \
  934         IPFW_RCFLAG_SET)
  935 /* Internally used flags */
  936 #define IPFW_RCFLAG_DEFAULT     0x0100  /* Do not skip defaul rule      */
  937 
  938 typedef struct _ipfw_ta_tinfo {
  939         uint32_t        flags;          /* Format flags                 */
  940         uint32_t        spare;
  941         uint8_t         taclass4;       /* algorithm class              */
  942         uint8_t         spare4;
  943         uint16_t        itemsize4;      /* item size in runtime         */
  944         uint32_t        size4;          /* runtime structure size       */
  945         uint32_t        count4;         /* number of items in runtime   */
  946         uint8_t         taclass6;       /* algorithm class              */
  947         uint8_t         spare6;
  948         uint16_t        itemsize6;      /* item size in runtime         */
  949         uint32_t        size6;          /* runtime structure size       */
  950         uint32_t        count6;         /* number of items in runtime   */
  951 } ipfw_ta_tinfo;
  952 #define IPFW_TACLASS_HASH       1       /* algo is based on hash        */
  953 #define IPFW_TACLASS_ARRAY      2       /* algo is based on array       */
  954 #define IPFW_TACLASS_RADIX      3       /* algo is based on radix tree  */
  955 
  956 #define IPFW_TATFLAGS_DATA      0x0001          /* Has data filled in   */
  957 #define IPFW_TATFLAGS_AFDATA    0x0002          /* Separate data per AF */
  958 #define IPFW_TATFLAGS_AFITEM    0x0004          /* diff. items per AF   */
  959 
  960 typedef struct _ipfw_xtable_info {
  961         uint8_t         type;           /* table type (addr,iface,..)   */
  962         uint8_t         tflags;         /* type flags                   */
  963         uint16_t        mflags;         /* modification flags           */
  964         uint16_t        flags;          /* generic table flags          */
  965         uint16_t        spare[3];
  966         uint32_t        vmask;          /* bitmask with value types     */
  967         uint32_t        set;            /* set table is in              */
  968         uint32_t        kidx;           /* kernel index                 */
  969         uint32_t        refcnt;         /* number of references         */
  970         uint32_t        count;          /* Number of records            */
  971         uint32_t        size;           /* Total size of records(export)*/
  972         uint32_t        limit;          /* Max number of records        */
  973         char            tablename[64];  /* table name */
  974         char            algoname[64];   /* algorithm name               */
  975         ipfw_ta_tinfo   ta_info;        /* additional algo stats        */
  976 } ipfw_xtable_info;
  977 /* Generic table flags */
  978 #define IPFW_TGFLAGS_LOCKED     0x01    /* Tables is locked from changes*/
  979 /* Table type-specific flags */
  980 #define IPFW_TFFLAG_SRCIP       0x01
  981 #define IPFW_TFFLAG_DSTIP       0x02
  982 #define IPFW_TFFLAG_SRCPORT     0x04
  983 #define IPFW_TFFLAG_DSTPORT     0x08
  984 #define IPFW_TFFLAG_PROTO       0x10
  985 /* Table modification flags */
  986 #define IPFW_TMFLAGS_LIMIT      0x0002  /* Change limit value           */
  987 #define IPFW_TMFLAGS_LOCK       0x0004  /* Change table lock state      */
  988 
  989 typedef struct _ipfw_iface_info {
  990         char            ifname[64];     /* interface name               */
  991         uint32_t        ifindex;        /* interface index              */
  992         uint32_t        flags;          /* flags                        */
  993         uint32_t        refcnt;         /* number of references         */
  994         uint32_t        gencnt;         /* number of changes            */
  995         uint64_t        spare;
  996 } ipfw_iface_info;
  997 #define IPFW_IFFLAG_RESOLVED    0x01    /* Interface exists             */
  998 
  999 typedef struct _ipfw_ta_info {
 1000         char            algoname[64];   /* algorithm name               */
 1001         uint32_t        type;           /* lookup type                  */
 1002         uint32_t        flags;
 1003         uint32_t        refcnt;
 1004         uint32_t        spare0;
 1005         uint64_t        spare1;
 1006 } ipfw_ta_info;
 1007 
 1008 typedef struct _ipfw_obj_header {
 1009         ip_fw3_opheader opheader;       /* IP_FW3 opcode                */
 1010         uint32_t        spare;
 1011         uint16_t        idx;            /* object name index            */
 1012         uint8_t         objtype;        /* object type                  */
 1013         uint8_t         objsubtype;     /* object subtype               */
 1014         ipfw_obj_ntlv   ntlv;           /* object name tlv              */
 1015 } ipfw_obj_header;
 1016 
 1017 typedef struct _ipfw_obj_lheader {
 1018         ip_fw3_opheader opheader;       /* IP_FW3 opcode                */
 1019         uint32_t        set_mask;       /* disabled set mask            */
 1020         uint32_t        count;          /* Total objects count          */
 1021         uint32_t        size;           /* Total size (incl. header)    */
 1022         uint32_t        objsize;        /* Size of one object           */
 1023 } ipfw_obj_lheader;
 1024 
 1025 #define IPFW_CFG_GET_STATIC     0x01
 1026 #define IPFW_CFG_GET_STATES     0x02
 1027 #define IPFW_CFG_GET_COUNTERS   0x04
 1028 typedef struct _ipfw_cfg_lheader {
 1029         ip_fw3_opheader opheader;       /* IP_FW3 opcode                */
 1030         uint32_t        set_mask;       /* enabled set mask             */
 1031         uint32_t        spare;
 1032         uint32_t        flags;          /* Request flags                */
 1033         uint32_t        size;           /* neded buffer size            */
 1034         uint32_t        start_rule;
 1035         uint32_t        end_rule;
 1036 } ipfw_cfg_lheader;
 1037 
 1038 typedef struct _ipfw_range_header {
 1039         ip_fw3_opheader opheader;       /* IP_FW3 opcode                */
 1040         ipfw_range_tlv  range;
 1041 } ipfw_range_header;
 1042 
 1043 typedef struct _ipfw_sopt_info {
 1044         uint16_t        opcode;
 1045         uint8_t         version;
 1046         uint8_t         dir;
 1047         uint8_t         spare;
 1048         uint64_t        refcnt;
 1049 } ipfw_sopt_info;
 1050 
 1051 #endif /* _IPFW2_H */

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