ip_fw.h revision 141351
1139823Simp/*- 298943Sluigi * Copyright (c) 2002 Luigi Rizzo, Universita` di Pisa 33969Sjkh * 498943Sluigi * Redistribution and use in source and binary forms, with or without 598943Sluigi * modification, are permitted provided that the following conditions 698943Sluigi * are met: 798943Sluigi * 1. Redistributions of source code must retain the above copyright 898943Sluigi * notice, this list of conditions and the following disclaimer. 998943Sluigi * 2. Redistributions in binary form must reproduce the above copyright 1098943Sluigi * notice, this list of conditions and the following disclaimer in the 1198943Sluigi * documentation and/or other materials provided with the distribution. 123969Sjkh * 1398943Sluigi * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1498943Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1598943Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1698943Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1798943Sluigi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1898943Sluigi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 1998943Sluigi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2098943Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2198943Sluigi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2298943Sluigi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2398943Sluigi * SUCH DAMAGE. 243969Sjkh * 2550477Speter * $FreeBSD: head/sys/netinet/ip_fw.h 141351 2005-02-05 12:06:33Z glebius $ 263969Sjkh */ 273969Sjkh 2898943Sluigi#ifndef _IPFW2_H 2998943Sluigi#define _IPFW2_H 30100228Sluigi#define IPFW2 1 31133920Sandre 323969Sjkh/* 3398943Sluigi * The kernel representation of ipfw rules is made of a list of 3498943Sluigi * 'instructions' (for all practical purposes equivalent to BPF 3598943Sluigi * instructions), which specify which fields of the packet 36115793Sticso * (or its metadata) should be analysed. 3726359Sjulian * 3898943Sluigi * Each instruction is stored in a structure which begins with 3998943Sluigi * "ipfw_insn", and can contain extra fields depending on the 4098943Sluigi * instruction type (listed below). 41115793Sticso * Note that the code is written so that individual instructions 42115793Sticso * have a size which is a multiple of 32 bits. This means that, if 43115793Sticso * such structures contain pointers or other 64-bit entities, 44115793Sticso * (there is just one instance now) they may end up unaligned on 45115793Sticso * 64-bit architectures, so the must be handled with care. 4698943Sluigi * 4798943Sluigi * "enum ipfw_opcodes" are the opcodes supported. We can have up 48133600Scsjp * to 256 different opcodes. When adding new opcodes, they should 49133600Scsjp * be appended to the end of the opcode list before O_LAST_OPCODE, 50133600Scsjp * this will prevent the ABI from being broken, otherwise users 51133600Scsjp * will have to recompile ipfw(8) when they update the kernel. 5226359Sjulian */ 5326359Sjulian 5498943Sluigienum ipfw_opcodes { /* arguments (4 byte each) */ 5598943Sluigi O_NOP, 5698943Sluigi 5798943Sluigi O_IP_SRC, /* u32 = IP */ 5898943Sluigi O_IP_SRC_MASK, /* ip = IP/mask */ 5998943Sluigi O_IP_SRC_ME, /* none */ 6098943Sluigi O_IP_SRC_SET, /* u32=base, arg1=len, bitmap */ 6198943Sluigi 6298943Sluigi O_IP_DST, /* u32 = IP */ 6398943Sluigi O_IP_DST_MASK, /* ip = IP/mask */ 6498943Sluigi O_IP_DST_ME, /* none */ 6598943Sluigi O_IP_DST_SET, /* u32=base, arg1=len, bitmap */ 6698943Sluigi 6798943Sluigi O_IP_SRCPORT, /* (n)port list:mask 4 byte ea */ 6898943Sluigi O_IP_DSTPORT, /* (n)port list:mask 4 byte ea */ 6998943Sluigi O_PROTO, /* arg1=protocol */ 7098943Sluigi 7198943Sluigi O_MACADDR2, /* 2 mac addr:mask */ 7298943Sluigi O_MAC_TYPE, /* same as srcport */ 7398943Sluigi 7498943Sluigi O_LAYER2, /* none */ 7598943Sluigi O_IN, /* none */ 7698943Sluigi O_FRAG, /* none */ 7798943Sluigi 7898943Sluigi O_RECV, /* none */ 7998943Sluigi O_XMIT, /* none */ 8098943Sluigi O_VIA, /* none */ 8198943Sluigi 8298943Sluigi O_IPOPT, /* arg1 = 2*u8 bitmap */ 8398943Sluigi O_IPLEN, /* arg1 = len */ 8498943Sluigi O_IPID, /* arg1 = id */ 8598943Sluigi 8698943Sluigi O_IPTOS, /* arg1 = id */ 8799475Sluigi O_IPPRECEDENCE, /* arg1 = precedence << 5 */ 8898943Sluigi O_IPTTL, /* arg1 = TTL */ 8998943Sluigi 9098943Sluigi O_IPVER, /* arg1 = version */ 9198943Sluigi O_UID, /* u32 = id */ 9298943Sluigi O_GID, /* u32 = id */ 9398943Sluigi O_ESTAB, /* none (tcp established) */ 9498943Sluigi O_TCPFLAGS, /* arg1 = 2*u8 bitmap */ 9598943Sluigi O_TCPWIN, /* arg1 = desired win */ 9698943Sluigi O_TCPSEQ, /* u32 = desired seq. */ 9798943Sluigi O_TCPACK, /* u32 = desired seq. */ 9898943Sluigi O_ICMPTYPE, /* u32 = icmp bitmap */ 9998943Sluigi O_TCPOPTS, /* arg1 = 2*u8 bitmap */ 10098943Sluigi 101112250Scjc O_VERREVPATH, /* none */ 102128575Sandre O_VERSRCREACH, /* none */ 103112250Scjc 10498943Sluigi O_PROBE_STATE, /* none */ 10598943Sluigi O_KEEP_STATE, /* none */ 10698943Sluigi O_LIMIT, /* ipfw_insn_limit */ 10798943Sluigi O_LIMIT_PARENT, /* dyn_type, not an opcode. */ 108117240Sluigi 10998943Sluigi /* 110117240Sluigi * These are really 'actions'. 11198943Sluigi */ 11298943Sluigi 11398943Sluigi O_LOG, /* ipfw_insn_log */ 11498943Sluigi O_PROB, /* u32 = match probability */ 11598943Sluigi 11698943Sluigi O_CHECK_STATE, /* none */ 11798943Sluigi O_ACCEPT, /* none */ 11898943Sluigi O_DENY, /* none */ 11998943Sluigi O_REJECT, /* arg1=icmp arg (same as deny) */ 12098943Sluigi O_COUNT, /* none */ 12198943Sluigi O_SKIPTO, /* arg1=next rule number */ 12298943Sluigi O_PIPE, /* arg1=pipe number */ 12398943Sluigi O_QUEUE, /* arg1=queue number */ 12498943Sluigi O_DIVERT, /* arg1=port number */ 12598943Sluigi O_TEE, /* arg1=port number */ 12698943Sluigi O_FORWARD_IP, /* fwd sockaddr */ 12798943Sluigi O_FORWARD_MAC, /* fwd mac */ 128117240Sluigi 129117240Sluigi /* 130117240Sluigi * More opcodes. 131117240Sluigi */ 132117240Sluigi O_IPSEC, /* has ipsec history */ 133130281Sru O_IP_SRC_LOOKUP, /* arg1=table number, u32=value */ 134130281Sru O_IP_DST_LOOKUP, /* arg1=table number, u32=value */ 135133849Sobrien O_ANTISPOOF, /* none */ 136133600Scsjp O_JAIL, /* u32 = id */ 137136071Sgreen O_ALTQ, /* u32 = altq classif. qid */ 138136073Sgreen O_DIVERTED, /* arg1=bitmap (1:loop, 2:out) */ 139136075Sgreen O_TCPDATALEN, /* arg1 = tcp data len */ 140117240Sluigi 141141351Sglebius /* 142141351Sglebius * actions for ng_ipfw 143141351Sglebius */ 144141351Sglebius O_NETGRAPH, /* send to ng_ipfw */ 145141351Sglebius O_NGTEE, /* copy to ng_ipfw */ 146141351Sglebius 14798943Sluigi O_LAST_OPCODE /* not an opcode! */ 14826359Sjulian}; 14926359Sjulian 15026359Sjulian/* 15198943Sluigi * Template for instructions. 1523969Sjkh * 15398943Sluigi * ipfw_insn is used for all instructions which require no operands, 15498943Sluigi * a single 16-bit value (arg1), or a couple of 8-bit values. 15598943Sluigi * 15698943Sluigi * For other instructions which require different/larger arguments 15798943Sluigi * we have derived structures, ipfw_insn_*. 15898943Sluigi * 15998943Sluigi * The size of the instruction (in 32-bit words) is in the low 16098943Sluigi * 6 bits of "len". The 2 remaining bits are used to implement 16198943Sluigi * NOT and OR on individual instructions. Given a type, you can 16298943Sluigi * compute the length to be put in "len" using F_INSN_SIZE(t) 16398943Sluigi * 16498943Sluigi * F_NOT negates the match result of the instruction. 16598943Sluigi * 16698943Sluigi * F_OR is used to build or blocks. By default, instructions 16798943Sluigi * are evaluated as part of a logical AND. An "or" block 16898943Sluigi * { X or Y or Z } contains F_OR set in all but the last 16998943Sluigi * instruction of the block. A match will cause the code 17098943Sluigi * to skip past the last instruction of the block. 17198943Sluigi * 17298943Sluigi * NOTA BENE: in a couple of places we assume that 17398943Sluigi * sizeof(ipfw_insn) == sizeof(u_int32_t) 17498943Sluigi * this needs to be fixed. 17598943Sluigi * 1763969Sjkh */ 17798943Sluigitypedef struct _ipfw_insn { /* template for instructions */ 17898943Sluigi enum ipfw_opcodes opcode:8; 17998943Sluigi u_int8_t len; /* numer of 32-byte words */ 18098943Sluigi#define F_NOT 0x80 18198943Sluigi#define F_OR 0x40 18298943Sluigi#define F_LEN_MASK 0x3f 18398943Sluigi#define F_LEN(cmd) ((cmd)->len & F_LEN_MASK) 1843969Sjkh 18598943Sluigi u_int16_t arg1; 18698943Sluigi} ipfw_insn; 18798943Sluigi 18896245Sluigi/* 18998943Sluigi * The F_INSN_SIZE(type) computes the size, in 4-byte words, of 19098943Sluigi * a given type. 19196245Sluigi */ 19298943Sluigi#define F_INSN_SIZE(t) ((sizeof (t))/sizeof(u_int32_t)) 19396245Sluigi 19498943Sluigi/* 19598943Sluigi * This is used to store an array of 16-bit entries (ports etc.) 19698943Sluigi */ 19798943Sluigitypedef struct _ipfw_insn_u16 { 19898943Sluigi ipfw_insn o; 19998943Sluigi u_int16_t ports[2]; /* there may be more */ 20098943Sluigi} ipfw_insn_u16; 20196245Sluigi 20298943Sluigi/* 20398943Sluigi * This is used to store an array of 32-bit entries 20498943Sluigi * (uid, single IPv4 addresses etc.) 20598943Sluigi */ 20698943Sluigitypedef struct _ipfw_insn_u32 { 20798943Sluigi ipfw_insn o; 20898943Sluigi u_int32_t d[1]; /* one or more */ 20998943Sluigi} ipfw_insn_u32; 21084058Sluigi 21198943Sluigi/* 21298943Sluigi * This is used to store IP addr-mask pairs. 21398943Sluigi */ 21498943Sluigitypedef struct _ipfw_insn_ip { 21598943Sluigi ipfw_insn o; 21698943Sluigi struct in_addr addr; 21798943Sluigi struct in_addr mask; 21898943Sluigi} ipfw_insn_ip; 2193969Sjkh 22098943Sluigi/* 221117240Sluigi * This is used to forward to a given address (ip). 22298943Sluigi */ 22398943Sluigitypedef struct _ipfw_insn_sa { 22498943Sluigi ipfw_insn o; 22598943Sluigi struct sockaddr_in sa; 22698943Sluigi} ipfw_insn_sa; 22785665Sjoe 22898943Sluigi/* 22998943Sluigi * This is used for MAC addr-mask pairs. 23098943Sluigi */ 23198943Sluigitypedef struct _ipfw_insn_mac { 23298943Sluigi ipfw_insn o; 23398943Sluigi u_char addr[12]; /* dst[6] + src[6] */ 23498943Sluigi u_char mask[12]; /* dst[6] + src[6] */ 23598943Sluigi} ipfw_insn_mac; 23685665Sjoe 23798943Sluigi/* 238117240Sluigi * This is used for interface match rules (recv xx, xmit xx). 23998943Sluigi */ 24098943Sluigitypedef struct _ipfw_insn_if { 24198943Sluigi ipfw_insn o; 24298943Sluigi union { 24398943Sluigi struct in_addr ip; 244121816Sbrooks int glob; 24598943Sluigi } p; 24698943Sluigi char name[IFNAMSIZ]; 24798943Sluigi} ipfw_insn_if; 24898943Sluigi 24998943Sluigi/* 25098943Sluigi * This is used for pipe and queue actions, which need to store 25198943Sluigi * a single pointer (which can have different size on different 25298943Sluigi * architectures. 253115793Sticso * Note that, because of previous instructions, pipe_ptr might 254115793Sticso * be unaligned in the overall structure, so it needs to be 255115793Sticso * manipulated with care. 25698943Sluigi */ 25798943Sluigitypedef struct _ipfw_insn_pipe { 25898943Sluigi ipfw_insn o; 259115793Sticso void *pipe_ptr; /* XXX */ 26098943Sluigi} ipfw_insn_pipe; 26198943Sluigi 26298943Sluigi/* 263136071Sgreen * This is used for storing an altq queue id number. 264136071Sgreen */ 265136071Sgreentypedef struct _ipfw_insn_altq { 266136071Sgreen ipfw_insn o; 267136071Sgreen u_int32_t qid; 268136071Sgreen} ipfw_insn_altq; 269136071Sgreen 270136071Sgreen/* 27198943Sluigi * This is used for limit rules. 27298943Sluigi */ 27398943Sluigitypedef struct _ipfw_insn_limit { 27498943Sluigi ipfw_insn o; 27598943Sluigi u_int8_t _pad; 27698943Sluigi u_int8_t limit_mask; /* combination of DYN_* below */ 27784058Sluigi#define DYN_SRC_ADDR 0x1 27884058Sluigi#define DYN_SRC_PORT 0x2 27984058Sluigi#define DYN_DST_ADDR 0x4 28084058Sluigi#define DYN_DST_PORT 0x8 28185665Sjoe 28298943Sluigi u_int16_t conn_limit; 28398943Sluigi} ipfw_insn_limit; 28449630Sluigi 28598943Sluigi/* 286117240Sluigi * This is used for log instructions. 28798943Sluigi */ 28898943Sluigitypedef struct _ipfw_insn_log { 28998943Sluigi ipfw_insn o; 29098943Sluigi u_int32_t max_log; /* how many do we log -- 0 = all */ 29198943Sluigi u_int32_t log_left; /* how many left to log */ 29298943Sluigi} ipfw_insn_log; 29326359Sjulian 29485689Sjoe/* 29598943Sluigi * Here we have the structure representing an ipfw rule. 29683725Sluigi * 29798943Sluigi * It starts with a general area (with link fields and counters) 29898943Sluigi * followed by an array of one or more instructions, which the code 29998943Sluigi * accesses as an array of 32-bit values. 30083725Sluigi * 30198943Sluigi * Given a rule pointer r: 30298943Sluigi * 30398943Sluigi * r->cmd is the start of the first instruction. 30498943Sluigi * ACTION_PTR(r) is the start of the first action (things to do 30598943Sluigi * once a rule matched). 30698943Sluigi * 30798943Sluigi * When assembling instruction, remember the following: 30898943Sluigi * 30998943Sluigi * + if a rule has a "keep-state" (or "limit") option, then the 31098943Sluigi * first instruction (at r->cmd) MUST BE an O_PROBE_STATE 31198943Sluigi * + if a rule has a "log" option, then the first action 31298943Sluigi * (at ACTION_PTR(r)) MUST be O_LOG 313136071Sgreen * + if a rule has an "altq" option, it comes after "log" 31498943Sluigi * 31598943Sluigi * NOTE: we use a simple linked list of rules because we never need 31698943Sluigi * to delete a rule without scanning the list. We do not use 31798943Sluigi * queue(3) macros for portability and readability. 31883725Sluigi */ 31983725Sluigi 32098943Sluigistruct ip_fw { 321100004Sluigi struct ip_fw *next; /* linked list of rules */ 322101628Sluigi struct ip_fw *next_rule; /* ptr to next [skipto] rule */ 323117240Sluigi /* 'next_rule' is used to pass up 'set_disable' status */ 324117240Sluigi 32598943Sluigi u_int16_t act_ofs; /* offset of action in 32-bit units */ 32698943Sluigi u_int16_t cmd_len; /* # of 32-bit words in cmd */ 32798943Sluigi u_int16_t rulenum; /* rule number */ 328101628Sluigi u_int8_t set; /* rule set (0..31) */ 329117654Sluigi#define RESVD_SET 31 /* set for default and persistent rules */ 330101628Sluigi u_int8_t _pad; /* padding */ 33198943Sluigi 33298943Sluigi /* These fields are present in all rules. */ 33398943Sluigi u_int64_t pcnt; /* Packet counter */ 33498943Sluigi u_int64_t bcnt; /* Byte counter */ 33598943Sluigi u_int32_t timestamp; /* tv_sec of last match */ 33698943Sluigi 33798943Sluigi ipfw_insn cmd[1]; /* storage for commands */ 33898943Sluigi}; 33998943Sluigi 34098943Sluigi#define ACTION_PTR(rule) \ 34198943Sluigi (ipfw_insn *)( (u_int32_t *)((rule)->cmd) + ((rule)->act_ofs) ) 34298943Sluigi 34398943Sluigi#define RULESIZE(rule) (sizeof(struct ip_fw) + \ 34498943Sluigi ((struct ip_fw *)(rule))->cmd_len * 4 - 4) 34598943Sluigi 3464277Sjkh/* 34798943Sluigi * This structure is used as a flow mask and a flow id for various 34898943Sluigi * parts of the code. 34957113Sluigi */ 35057113Sluigistruct ipfw_flow_id { 35185665Sjoe u_int32_t dst_ip; 35285665Sjoe u_int32_t src_ip; 35385665Sjoe u_int16_t dst_port; 35485665Sjoe u_int16_t src_port; 35585665Sjoe u_int8_t proto; 35685665Sjoe u_int8_t flags; /* protocol-specific flags */ 35785665Sjoe}; 35857113Sluigi 35957113Sluigi/* 360117240Sluigi * Dynamic ipfw rule. 36157113Sluigi */ 36298943Sluigitypedef struct _ipfw_dyn_rule ipfw_dyn_rule; 36398943Sluigi 36498943Sluigistruct _ipfw_dyn_rule { 36598943Sluigi ipfw_dyn_rule *next; /* linked list of rules. */ 36698943Sluigi struct ip_fw *rule; /* pointer to rule */ 367117240Sluigi /* 'rule' is used to pass up the rule number (from the parent) */ 368117240Sluigi 36998943Sluigi ipfw_dyn_rule *parent; /* pointer to parent rule */ 37098943Sluigi u_int64_t pcnt; /* packet match counter */ 37198943Sluigi u_int64_t bcnt; /* byte match counter */ 372115793Sticso struct ipfw_flow_id id; /* (masked) flow id */ 373115793Sticso u_int32_t expire; /* expire time */ 37498943Sluigi u_int32_t bucket; /* which bucket in hash table */ 37585665Sjoe u_int32_t state; /* state of this rule (typically a 37685665Sjoe * combination of TCP flags) 37785665Sjoe */ 378100004Sluigi u_int32_t ack_fwd; /* most recent ACKs in forward */ 379100004Sluigi u_int32_t ack_rev; /* and reverse directions (used */ 380100004Sluigi /* to generate keepalives) */ 38198943Sluigi u_int16_t dyn_type; /* rule type */ 38298943Sluigi u_int16_t count; /* refcount */ 38385665Sjoe}; 38457113Sluigi 38557113Sluigi/* 38611119Sugen * Definitions for IP option names. 38711119Sugen */ 38885665Sjoe#define IP_FW_IPOPT_LSRR 0x01 38985665Sjoe#define IP_FW_IPOPT_SSRR 0x02 39085665Sjoe#define IP_FW_IPOPT_RR 0x04 39185665Sjoe#define IP_FW_IPOPT_TS 0x08 39211119Sugen 39311119Sugen/* 39461420Sdan * Definitions for TCP option names. 39561420Sdan */ 39685665Sjoe#define IP_FW_TCPOPT_MSS 0x01 39785665Sjoe#define IP_FW_TCPOPT_WINDOW 0x02 39885665Sjoe#define IP_FW_TCPOPT_SACK 0x04 39985665Sjoe#define IP_FW_TCPOPT_TS 0x08 40085665Sjoe#define IP_FW_TCPOPT_CC 0x10 40161420Sdan 40298943Sluigi#define ICMP_REJECT_RST 0x100 /* fake ICMP code (send a TCP RST) */ 40398943Sluigi 40461420Sdan/* 405130281Sru * These are used for lookup tables. 406130281Sru */ 407130281Srutypedef struct _ipfw_table_entry { 408130281Sru in_addr_t addr; /* network address */ 409130281Sru u_int32_t value; /* value */ 410130281Sru u_int16_t tbl; /* table number */ 411130281Sru u_int8_t masklen; /* mask length */ 412130281Sru} ipfw_table_entry; 413130281Sru 414130281Srutypedef struct _ipfw_table { 415130281Sru u_int32_t size; /* size of entries in bytes */ 416130281Sru u_int32_t cnt; /* # of entries */ 417130281Sru u_int16_t tbl; /* table number */ 418130281Sru ipfw_table_entry ent[0]; /* entries */ 419130281Sru} ipfw_table; 420130281Sru 421130281Sru/* 4224277Sjkh * Main firewall chains definitions and global var's definitions. 4234277Sjkh */ 42455205Speter#ifdef _KERNEL 4255543Sugen 426140224Sglebius/* Return values from ipfw_chk() */ 427140224Sglebiusenum { 428140224Sglebius IP_FW_PASS = 0, 429140224Sglebius IP_FW_DENY, 430140224Sglebius IP_FW_DIVERT, 431140224Sglebius IP_FW_TEE, 432140224Sglebius IP_FW_DUMMYNET, 433140224Sglebius IP_FW_NETGRAPH, 434141351Sglebius IP_FW_NGTEE, 435140224Sglebius}; 436140224Sglebius 437140224Sglebius/* flags for divert mtag */ 438136073Sgreen#define IP_FW_DIVERT_LOOPBACK_FLAG 0x00080000 439136073Sgreen#define IP_FW_DIVERT_OUTPUT_FLAG 0x00100000 44054175Sarchie 4415543Sugen/* 442117240Sluigi * Arguments for calling ipfw_chk() and dummynet_io(). We put them 44398613Sluigi * all into a structure because this way it is easier and more 44498613Sluigi * efficient to pass variables around and extend the interface. 44598613Sluigi */ 44698613Sluigistruct ip_fw_args { 44798613Sluigi struct mbuf *m; /* the mbuf chain */ 44898613Sluigi struct ifnet *oif; /* output interface */ 44998613Sluigi struct sockaddr_in *next_hop; /* forward address */ 45098613Sluigi struct ip_fw *rule; /* matching rule */ 45198613Sluigi struct ether_header *eh; /* for bridged packets */ 45298613Sluigi 45398613Sluigi int flags; /* for dummynet */ 45498613Sluigi 45598613Sluigi struct ipfw_flow_id f_id; /* grabbed from IP header */ 456140224Sglebius u_int32_t cookie; /* a cookie depending on rule action */ 457135920Smlaier struct inpcb *inp; 45898613Sluigi}; 45998613Sluigi 46098613Sluigi/* 4615543Sugen * Function definitions. 4625543Sugen */ 4635543Sugen 46438482Swollman/* Firewall hooks */ 46538482Swollmanstruct sockopt; 46698943Sluigistruct dn_flow_set; 46798943Sluigi 468135920Smlaierint ipfw_check_in(void *, struct mbuf **, struct ifnet *, int, struct inpcb *inp); 469135920Smlaierint ipfw_check_out(void *, struct mbuf **, struct ifnet *, int, struct inpcb *inp); 470133920Sandre 471133920Sandreint ipfw_chk(struct ip_fw_args *); 472133920Sandre 473133920Sandreint ipfw_init(void); 474133920Sandrevoid ipfw_destroy(void); 475133920Sandre 47698943Sluigivoid flush_pipe_ptrs(struct dn_flow_set *match); /* used by dummynet */ 47798943Sluigi 478133920Sandretypedef int ip_fw_ctl_t(struct sockopt *); 47985665Sjoeextern ip_fw_ctl_t *ip_fw_ctl_ptr; 48057113Sluigiextern int fw_one_pass; 481134022Sandreextern int fw_enable; 482133920Sandre 483133920Sandre/* For kernel ipfw_ether and ipfw_bridge. */ 484133920Sandretypedef int ip_fw_chk_t(struct ip_fw_args *args); 485133920Sandreextern ip_fw_chk_t *ip_fw_chk_ptr; 48686047Sluigi#define IPFW_LOADED (ip_fw_chk_ptr != NULL) 487133920Sandre 48855205Speter#endif /* _KERNEL */ 48998943Sluigi#endif /* _IPFW2_H */ 490