[apple/xnu.git] / bsd / netinet / ip_fw.h

/*
 * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1993 Daniel Boulet
 * Copyright (c) 1994 Ugen J.S.Antsilevich
 *
 * Redistribution and use in source forms, with and without modification,
 * are permitted provided that this entire comment appears intact.
 *
 * Redistribution in binary form may occur without any restrictions.
 * Obviously, it would be nice if you gave credit where credit is due
 * but requiring it would be too onerous.
 *
 * This software is provided ``AS IS'' without any warranties of any kind.
 *
 */

#ifndef _IP_FW_H
#define _IP_FW_H
#include <sys/appleapiopts.h>

#include <sys/queue.h>


#define IP_FW_CURRENT_API_VERSION 20	/* Version of this API */


/*
 * This union structure identifies an interface, either explicitly
 * by name or implicitly by IP address. The flags IP_FW_F_IIFNAME
 * and IP_FW_F_OIFNAME say how to interpret this structure. An
 * interface unit number of -1 matches any unit number, while an
 * IP address of 0.0.0.0 indicates matches any interface.
 *
 * The receive and transmit interfaces are only compared against the
 * the packet if the corresponding bit (IP_FW_F_IIFACE or IP_FW_F_OIFACE)
 * is set. Note some packets lack a receive or transmit interface
 * (in which case the missing "interface" never matches).
 */

union ip_fw_if {
    struct in_addr fu_via_ip;	/* Specified by IP address */
    struct {			/* Specified by interface name */
#define FW_IFNLEN     10 /* need room ! was IFNAMSIZ */
	    char  name[FW_IFNLEN];
	    short unit;		/* -1 means match any unit */
    } fu_via_if;
};

/*
 * Format of an IP firewall descriptor
 *
 * fw_src, fw_dst, fw_smsk, fw_dmsk are always stored in network byte order.
 * fw_flg and fw_n*p are stored in host byte order (of course).
 * Port numbers are stored in HOST byte order.
 */

struct ip_fw {
	u_int32_t version;		/* Version of this structure.  Should always be */
							/* set to IP_FW_CURRENT_API_VERSION by clients. */
	void *context;			/* Context that is usable by user processes to */
							/* identify this rule. */
    u_int64_t fw_pcnt,fw_bcnt;		/* Packet and byte counters */
    struct in_addr fw_src, fw_dst;	/* Source and destination IP addr */
    struct in_addr fw_smsk, fw_dmsk;	/* Mask for src and dest IP addr */
    u_short fw_number;			/* Rule number */
    u_int fw_flg;			/* Flags word */
#define IP_FW_MAX_PORTS	10		/* A reasonable maximum */
	union {
	u_short fw_pts[IP_FW_MAX_PORTS];	/* Array of port numbers to match */
#define IP_FW_ICMPTYPES_MAX	128
#define IP_FW_ICMPTYPES_DIM	(IP_FW_ICMPTYPES_MAX / (sizeof(unsigned) * 8))
	unsigned fw_icmptypes[IP_FW_ICMPTYPES_DIM]; /* ICMP types bitmap */
	} fw_uar;
    u_int fw_ipflg;			/* IP flags word */
    u_char fw_ipopt,fw_ipnopt;		/* IP options set/unset */
    u_char fw_tcpopt,fw_tcpnopt;	/* TCP options set/unset */
    u_char fw_tcpf,fw_tcpnf;		/* TCP flags set/unset */
    long timestamp;			/* timestamp (tv_sec) of last match */
    union ip_fw_if fw_in_if, fw_out_if;	/* Incoming and outgoing interfaces */
    union {
	u_short fu_divert_port;		/* Divert/tee port (options IPDIVERT) */
	u_short fu_pipe_nr;		/* queue number (option DUMMYNET) */
	u_short fu_skipto_rule;		/* SKIPTO command rule number */
	u_short fu_reject_code;		/* REJECT response code */
	struct sockaddr_in fu_fwd_ip;
    } fw_un;
    u_char fw_prot;			/* IP protocol */
	/*
	 * N'of src ports and # of dst ports in ports array (dst ports
	 * follow src ports; max of 10 ports in all; count of 0 means
	 * match all ports)
	 */
    u_char fw_nports;
    void *pipe_ptr;                    /* flow_set ptr for dummynet pipe */
    void *next_rule_ptr ;              /* next rule in case of match */
    uid_t fw_uid;			/* uid to match */
    int fw_logamount;			/* amount to log */
    u_int64_t fw_loghighest;		/* highest number packet to log */
};

/*
 * extended ipfw structure... some fields in the original struct
 * can be used to pass parameters up/down, namely pointers
 *     void *pipe_ptr
 *     void *next_rule_ptr 
 * some others can be used to pass parameters down, namely counters etc.
 *     u_int64_t fw_pcnt,fw_bcnt;
 *     long timestamp;
 */

struct ip_fw_ext {             /* extended structure */
    struct ip_fw rule;      /* must be at offset 0 */
    long    dont_match_prob;        /* 0x7fffffff means 1.0, always fail */
    u_int   dyn_type;  /* type for dynamic rule */
};

#define IP_FW_GETNSRCP(rule)		((rule)->fw_nports & 0x0f)
#define IP_FW_SETNSRCP(rule, n)		do {				\
					  (rule)->fw_nports &= ~0x0f;	\
					  (rule)->fw_nports |= (n);	\
					} while (0)
#define IP_FW_GETNDSTP(rule)		((rule)->fw_nports >> 4)
#define IP_FW_SETNDSTP(rule, n)		do {				\
					  (rule)->fw_nports &= ~0xf0;	\
					  (rule)->fw_nports |= (n) << 4;\
					} while (0)

#define fw_divert_port	fw_un.fu_divert_port
#define fw_skipto_rule	fw_un.fu_skipto_rule
#define fw_reject_code	fw_un.fu_reject_code
#define fw_pipe_nr	fw_un.fu_pipe_nr
#define fw_fwd_ip	fw_un.fu_fwd_ip

struct ip_fw_chain {
	LIST_ENTRY(ip_fw_chain) next;
	struct ip_fw *rule;
};

/*
 * Flow mask/flow id for each queue.
 */
struct ipfw_flow_id {
    u_int32_t dst_ip, src_ip ;
    u_int16_t dst_port, src_port ; 
    u_int8_t proto ;    
    u_int8_t flags ;    /* protocol-specific flags */
} ;

/*
 * dynamic ipfw rule
 */
struct ipfw_dyn_rule {
    struct ipfw_dyn_rule *next ;

    struct ipfw_flow_id id ;
    struct ipfw_flow_id mask ;
    struct ip_fw_chain *chain ;		/* pointer to parent rule	*/
    u_int32_t type ;			/* rule type			*/
    u_int32_t expire ;			/* expire time			*/
    u_int64_t pcnt, bcnt;		/* match counters		*/
    u_int32_t bucket ;			/* which bucket in hash table	*/
    u_int32_t state ;			/* state of this rule (typ. a   */
					/* combination of TCP flags)	*/
} ;

/*
 * Values for "flags" field .
 */
#define IP_FW_F_COMMAND 0x000000ff	/* Mask for type of chain entry:	*/
#define IP_FW_F_DENY	0x00000000	/* This is a deny rule			*/
#define IP_FW_F_REJECT	0x00000001	/* Deny and send a response packet	*/
#define IP_FW_F_ACCEPT	0x00000002	/* This is an accept rule		*/
#define IP_FW_F_COUNT	0x00000003	/* This is a count rule			*/
#define IP_FW_F_DIVERT	0x00000004	/* This is a divert rule		*/
#define IP_FW_F_TEE	0x00000005	/* This is a tee rule			*/
#define IP_FW_F_SKIPTO	0x00000006	/* This is a skipto rule		*/
#define IP_FW_F_FWD	0x00000007	/* This is a "change forwarding address" rule */
#define IP_FW_F_PIPE	0x00000008	/* This is a dummynet rule */
#define IP_FW_F_QUEUE	0x00000009	/* This is a dummynet queue */

#define IP_FW_F_IN	0x00000100	/* Check inbound packets		*/
#define IP_FW_F_OUT	0x00000200	/* Check outbound packets		*/
#define IP_FW_F_IIFACE	0x00000400	/* Apply inbound interface test		*/
#define IP_FW_F_OIFACE	0x00000800	/* Apply outbound interface test	*/

#define IP_FW_F_PRN	0x00001000	/* Print if this rule matches		*/

#define IP_FW_F_SRNG	0x00002000	/* The first two src ports are a min	*
					 * and max range (stored in host byte	*
					 * order).				*/

#define IP_FW_F_DRNG	0x00004000	/* The first two dst ports are a min	*
					 * and max range (stored in host byte	*
					 * order).				*/

#define IP_FW_F_FRAG	0x00008000	/* Fragment				*/

#define IP_FW_F_IIFNAME	0x00010000	/* In interface by name/unit (not IP)	*/
#define IP_FW_F_OIFNAME	0x00020000	/* Out interface by name/unit (not IP)	*/

#define IP_FW_F_INVSRC	0x00040000	/* Invert sense of src check		*/
#define IP_FW_F_INVDST	0x00080000	/* Invert sense of dst check		*/

#define IP_FW_F_ICMPBIT 0x00100000	/* ICMP type bitmap is valid		*/

#define IP_FW_F_UID	0x00200000	/* filter by uid			*/

#define IP_FW_F_RND_MATCH 0x00800000	/* probabilistic rule match		*/
#define IP_FW_F_SMSK	0x01000000	/* src-port + mask 			*/
#define IP_FW_F_DMSK	0x02000000	/* dst-port + mask 			*/
#define	IP_FW_BRIDGED	0x04000000	/* only match bridged packets		*/
#define IP_FW_F_KEEP_S	0x08000000	/* keep state	 			*/
#define IP_FW_F_CHECK_S	0x10000000	/* check state	 			*/

#define IP_FW_F_SME	0x20000000	/* source = me				*/
#define IP_FW_F_DME	0x40000000	/* destination = me			*/

#define IP_FW_F_MASK	0x7FFFFFFF	/* All possible flag bits mask		*/

/*
 * Flags for the 'fw_ipflg' field, for comparing values of ip and its protocols.
 */
#define	IP_FW_IF_TCPEST	0x00000020	/* established TCP connection */
#define	IP_FW_IF_TCPMSK	0x00000020	/* mask of all TCP values */

/*
 * For backwards compatibility with rules specifying "via iface" but
 * not restricted to only "in" or "out" packets, we define this combination
 * of bits to represent this configuration.
 */

#define IF_FW_F_VIAHACK	(IP_FW_F_IN|IP_FW_F_OUT|IP_FW_F_IIFACE|IP_FW_F_OIFACE)

/*
 * Definitions for REJECT response codes.
 * Values less than 256 correspond to ICMP unreachable codes.
 */
#define IP_FW_REJECT_RST	0x0100		/* TCP packets: send RST */

/*
 * Definitions for IP option names.
 */
#define IP_FW_IPOPT_LSRR	0x01
#define IP_FW_IPOPT_SSRR	0x02
#define IP_FW_IPOPT_RR		0x04
#define IP_FW_IPOPT_TS		0x08

/*
 * Definitions for TCP option names.
 */
#define IP_FW_TCPOPT_MSS	0x01
#define IP_FW_TCPOPT_WINDOW	0x02
#define IP_FW_TCPOPT_SACK	0x04
#define IP_FW_TCPOPT_TS		0x08
#define IP_FW_TCPOPT_CC		0x10

/*
 * Definitions for TCP flags.
 */
#define IP_FW_TCPF_FIN		TH_FIN
#define IP_FW_TCPF_SYN		TH_SYN
#define IP_FW_TCPF_RST		TH_RST
#define IP_FW_TCPF_PSH		TH_PUSH
#define IP_FW_TCPF_ACK		TH_ACK
#define IP_FW_TCPF_URG		TH_URG

/*
 * Main firewall chains definitions and global var's definitions.
 */
#ifdef KERNEL
#ifdef __APPLE_API_PRIVATE

#define IP_FW_PORT_DYNT_FLAG	0x10000
#define	IP_FW_PORT_TEE_FLAG	0x20000
#define	IP_FW_PORT_DENY_FLAG	0x40000

/*
 * Function definitions.
 */
void ip_fw_init __P((void));

/* Firewall hooks */
struct ip;
struct sockopt;
typedef	int ip_fw_chk_t __P((struct ip **, int, struct ifnet *, u_int16_t *,
	     struct mbuf **, struct ip_fw_chain **, struct sockaddr_in **));
typedef	int ip_fw_ctl_t __P((struct sockopt *));
extern	ip_fw_chk_t *ip_fw_chk_ptr;
extern	ip_fw_ctl_t *ip_fw_ctl_ptr;
extern int fw_one_pass;
extern int fw_enable;
extern struct ipfw_flow_id last_pkt ;
#endif /* __APPLE_API_PRIVATE */
#endif /* KERNEL */

#endif /* _IP_FW_H */
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
e5568f75 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
e5568f75 A	12	* This Original Code and all software distributed under the License are
e5568f75 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
e5568f75 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1993 Daniel Boulet
	24	* Copyright (c) 1994 Ugen J.S.Antsilevich
	25	*
	26	* Redistribution and use in source forms, with and without modification,
	27	* are permitted provided that this entire comment appears intact.
	28	*
	29	* Redistribution in binary form may occur without any restrictions.
	30	* Obviously, it would be nice if you gave credit where credit is due
	31	* but requiring it would be too onerous.
	32	*
	33	* This software is provided ``AS IS'' without any warranties of any kind.
	34	*
	35	*/
	36
	37	#ifndef _IP_FW_H
	38	#define _IP_FW_H
9bccf70c	39	#include <sys/appleapiopts.h>
1c79356b A	40
	41	#include <sys/queue.h>
	42
9bccf70c A	43
	44	#define IP_FW_CURRENT_API_VERSION 20 /* Version of this API */
	45
	46
1c79356b A	47	/*
	48	* This union structure identifies an interface, either explicitly
	49	* by name or implicitly by IP address. The flags IP_FW_F_IIFNAME
	50	* and IP_FW_F_OIFNAME say how to interpret this structure. An
	51	* interface unit number of -1 matches any unit number, while an
	52	* IP address of 0.0.0.0 indicates matches any interface.
	53	*
	54	* The receive and transmit interfaces are only compared against the
	55	* the packet if the corresponding bit (IP_FW_F_IIFACE or IP_FW_F_OIFACE)
	56	* is set. Note some packets lack a receive or transmit interface
	57	* (in which case the missing "interface" never matches).
	58	*/
	59
	60	union ip_fw_if {
	61	struct in_addr fu_via_ip; /* Specified by IP address */
	62	struct { /* Specified by interface name */
	63	#define FW_IFNLEN 10 /* need room ! was IFNAMSIZ */
	64	char name[FW_IFNLEN];
	65	short unit; /* -1 means match any unit */
	66	} fu_via_if;
	67	};
	68
	69	/*
	70	* Format of an IP firewall descriptor
	71	*
	72	* fw_src, fw_dst, fw_smsk, fw_dmsk are always stored in network byte order.
	73	* fw_flg and fw_n*p are stored in host byte order (of course).
	74	* Port numbers are stored in HOST byte order.
1c79356b A	75	*/
	76
	77	struct ip_fw {
9bccf70c A	78	u_int32_t version; /* Version of this structure. Should always be */
	79	/* set to IP_FW_CURRENT_API_VERSION by clients. */
	80	void context; / Context that is usable by user processes to */
	81	/* identify this rule. */
1c79356b A	82	u_int64_t fw_pcnt,fw_bcnt; /* Packet and byte counters */
	83	struct in_addr fw_src, fw_dst; /* Source and destination IP addr */
	84	struct in_addr fw_smsk, fw_dmsk; /* Mask for src and dest IP addr */
	85	u_short fw_number; /* Rule number */
	86	u_int fw_flg; /* Flags word */
	87	#define IP_FW_MAX_PORTS 10 /* A reasonable maximum */
	88	union {
	89	u_short fw_pts[IP_FW_MAX_PORTS]; /* Array of port numbers to match */
	90	#define IP_FW_ICMPTYPES_MAX 128
	91	#define IP_FW_ICMPTYPES_DIM (IP_FW_ICMPTYPES_MAX / (sizeof(unsigned) * 8))
	92	unsigned fw_icmptypes[IP_FW_ICMPTYPES_DIM]; /* ICMP types bitmap */
	93	} fw_uar;
9bccf70c	94	u_int fw_ipflg; /* IP flags word */
1c79356b	95	u_char fw_ipopt,fw_ipnopt; /* IP options set/unset */
9bccf70c	96	u_char fw_tcpopt,fw_tcpnopt; /* TCP options set/unset */
1c79356b A	97	u_char fw_tcpf,fw_tcpnf; /* TCP flags set/unset */
	98	long timestamp; /* timestamp (tv_sec) of last match */
	99	union ip_fw_if fw_in_if, fw_out_if; /* Incoming and outgoing interfaces */
	100	union {
	101	u_short fu_divert_port; /* Divert/tee port (options IPDIVERT) */
9bccf70c	102	u_short fu_pipe_nr; /* queue number (option DUMMYNET) */
1c79356b A	103	u_short fu_skipto_rule; /* SKIPTO command rule number */
	104	u_short fu_reject_code; /* REJECT response code */
	105	struct sockaddr_in fu_fwd_ip;
	106	} fw_un;
	107	u_char fw_prot; /* IP protocol */
9bccf70c A	108	/*
	109	* N'of src ports and # of dst ports in ports array (dst ports
	110	* follow src ports; max of 10 ports in all; count of 0 means
	111	* match all ports)
	112	*/
	113	u_char fw_nports;
	114	void pipe_ptr; / flow_set ptr for dummynet pipe */
1c79356b	115	void next_rule_ptr ; / next rule in case of match */
9bccf70c A	116	uid_t fw_uid; /* uid to match */
	117	int fw_logamount; /* amount to log */
	118	u_int64_t fw_loghighest; /* highest number packet to log */
	119	};
	120
	121	/*
	122	* extended ipfw structure... some fields in the original struct
	123	* can be used to pass parameters up/down, namely pointers
	124	* void *pipe_ptr
	125	* void *next_rule_ptr
	126	* some others can be used to pass parameters down, namely counters etc.
	127	* u_int64_t fw_pcnt,fw_bcnt;
	128	* long timestamp;
	129	*/
	130
	131	struct ip_fw_ext { /* extended structure */
	132	struct ip_fw rule; /* must be at offset 0 */
	133	long dont_match_prob; /* 0x7fffffff means 1.0, always fail */
	134	u_int dyn_type; /* type for dynamic rule */
1c79356b A	135	};
	136
	137	#define IP_FW_GETNSRCP(rule) ((rule)->fw_nports & 0x0f)
	138	#define IP_FW_SETNSRCP(rule, n) do { \
	139	(rule)->fw_nports &= ~0x0f; \
	140	(rule)->fw_nports \|= (n); \
	141	} while (0)
	142	#define IP_FW_GETNDSTP(rule) ((rule)->fw_nports >> 4)
	143	#define IP_FW_SETNDSTP(rule, n) do { \
	144	(rule)->fw_nports &= ~0xf0; \
	145	(rule)->fw_nports \|= (n) << 4;\
	146	} while (0)
	147
	148	#define fw_divert_port fw_un.fu_divert_port
	149	#define fw_skipto_rule fw_un.fu_skipto_rule
	150	#define fw_reject_code fw_un.fu_reject_code
	151	#define fw_pipe_nr fw_un.fu_pipe_nr
	152	#define fw_fwd_ip fw_un.fu_fwd_ip
	153
	154	struct ip_fw_chain {
9bccf70c A	155	LIST_ENTRY(ip_fw_chain) next;
9bccf70c A	156	struct ip_fw *rule;
1c79356b A	157	};
1c79356b A	158
9bccf70c A	159	/*
	160	* Flow mask/flow id for each queue.
	161	*/
	162	struct ipfw_flow_id {
	163	u_int32_t dst_ip, src_ip ;
	164	u_int16_t dst_port, src_port ;
	165	u_int8_t proto ;
	166	u_int8_t flags ; /* protocol-specific flags */
	167	} ;
	168
	169	/*
	170	* dynamic ipfw rule
	171	*/
	172	struct ipfw_dyn_rule {
	173	struct ipfw_dyn_rule *next ;
	174
	175	struct ipfw_flow_id id ;
	176	struct ipfw_flow_id mask ;
	177	struct ip_fw_chain chain ; / pointer to parent rule */
	178	u_int32_t type ; /* rule type */
	179	u_int32_t expire ; /* expire time */
	180	u_int64_t pcnt, bcnt; /* match counters */
	181	u_int32_t bucket ; /* which bucket in hash table */
	182	u_int32_t state ; /* state of this rule (typ. a */
	183	/* combination of TCP flags) */
	184	} ;
	185
1c79356b A	186	/*
	187	* Values for "flags" field .
	188	*/
	189	#define IP_FW_F_COMMAND 0x000000ff /* Mask for type of chain entry: */
	190	#define IP_FW_F_DENY 0x00000000 /* This is a deny rule */
	191	#define IP_FW_F_REJECT 0x00000001 /* Deny and send a response packet */
	192	#define IP_FW_F_ACCEPT 0x00000002 /* This is an accept rule */
	193	#define IP_FW_F_COUNT 0x00000003 /* This is a count rule */
	194	#define IP_FW_F_DIVERT 0x00000004 /* This is a divert rule */
	195	#define IP_FW_F_TEE 0x00000005 /* This is a tee rule */
	196	#define IP_FW_F_SKIPTO 0x00000006 /* This is a skipto rule */
	197	#define IP_FW_F_FWD 0x00000007 /* This is a "change forwarding address" rule */
	198	#define IP_FW_F_PIPE 0x00000008 /* This is a dummynet rule */
9bccf70c	199	#define IP_FW_F_QUEUE 0x00000009 /* This is a dummynet queue */
1c79356b A	200
	201	#define IP_FW_F_IN 0x00000100 /* Check inbound packets */
	202	#define IP_FW_F_OUT 0x00000200 /* Check outbound packets */
	203	#define IP_FW_F_IIFACE 0x00000400 /* Apply inbound interface test */
	204	#define IP_FW_F_OIFACE 0x00000800 /* Apply outbound interface test */
	205
	206	#define IP_FW_F_PRN 0x00001000 /* Print if this rule matches */
	207
	208	#define IP_FW_F_SRNG 0x00002000 /* The first two src ports are a min *
	209	* and max range (stored in host byte *
	210	* order). */
	211
	212	#define IP_FW_F_DRNG 0x00004000 /* The first two dst ports are a min *
	213	* and max range (stored in host byte *
	214	* order). */
	215
	216	#define IP_FW_F_FRAG 0x00008000 /* Fragment */
	217
	218	#define IP_FW_F_IIFNAME 0x00010000 /* In interface by name/unit (not IP) */
	219	#define IP_FW_F_OIFNAME 0x00020000 /* Out interface by name/unit (not IP) */
	220
	221	#define IP_FW_F_INVSRC 0x00040000 /* Invert sense of src check */
	222	#define IP_FW_F_INVDST 0x00080000 /* Invert sense of dst check */
	223
	224	#define IP_FW_F_ICMPBIT 0x00100000 /* ICMP type bitmap is valid */
	225
9bccf70c A	226	#define IP_FW_F_UID 0x00200000 /* filter by uid */
	227
	228	#define IP_FW_F_RND_MATCH 0x00800000 /* probabilistic rule match */
	229	#define IP_FW_F_SMSK 0x01000000 /* src-port + mask */
	230	#define IP_FW_F_DMSK 0x02000000 /* dst-port + mask */
	231	#define IP_FW_BRIDGED 0x04000000 /* only match bridged packets */
	232	#define IP_FW_F_KEEP_S 0x08000000 /* keep state */
	233	#define IP_FW_F_CHECK_S 0x10000000 /* check state */
	234
	235	#define IP_FW_F_SME 0x20000000 /* source = me */
	236	#define IP_FW_F_DME 0x40000000 /* destination = me */
	237
	238	#define IP_FW_F_MASK 0x7FFFFFFF /* All possible flag bits mask */
	239
	240	/*
	241	* Flags for the 'fw_ipflg' field, for comparing values of ip and its protocols.
	242	*/
	243	#define IP_FW_IF_TCPEST 0x00000020 /* established TCP connection */
	244	#define IP_FW_IF_TCPMSK 0x00000020 /* mask of all TCP values */
1c79356b A	245
	246	/*
	247	* For backwards compatibility with rules specifying "via iface" but
	248	* not restricted to only "in" or "out" packets, we define this combination
	249	* of bits to represent this configuration.
	250	*/
	251
	252	#define IF_FW_F_VIAHACK (IP_FW_F_IN\|IP_FW_F_OUT\|IP_FW_F_IIFACE\|IP_FW_F_OIFACE)
	253
	254	/*
	255	* Definitions for REJECT response codes.
	256	* Values less than 256 correspond to ICMP unreachable codes.
	257	*/
	258	#define IP_FW_REJECT_RST 0x0100 /* TCP packets: send RST */
	259
	260	/*
	261	* Definitions for IP option names.
	262	*/
	263	#define IP_FW_IPOPT_LSRR 0x01
	264	#define IP_FW_IPOPT_SSRR 0x02
	265	#define IP_FW_IPOPT_RR 0x04
	266	#define IP_FW_IPOPT_TS 0x08
	267
9bccf70c A	268	/*
	269	* Definitions for TCP option names.
	270	*/
	271	#define IP_FW_TCPOPT_MSS 0x01
	272	#define IP_FW_TCPOPT_WINDOW 0x02
	273	#define IP_FW_TCPOPT_SACK 0x04
	274	#define IP_FW_TCPOPT_TS 0x08
	275	#define IP_FW_TCPOPT_CC 0x10
	276
1c79356b A	277	/*
	278	* Definitions for TCP flags.
	279	*/
	280	#define IP_FW_TCPF_FIN TH_FIN
	281	#define IP_FW_TCPF_SYN TH_SYN
	282	#define IP_FW_TCPF_RST TH_RST
	283	#define IP_FW_TCPF_PSH TH_PUSH
	284	#define IP_FW_TCPF_ACK TH_ACK
	285	#define IP_FW_TCPF_URG TH_URG
1c79356b A	286
	287	/*
	288	* Main firewall chains definitions and global var's definitions.
	289	*/
	290	#ifdef KERNEL
9bccf70c A	291	#ifdef __APPLE_API_PRIVATE
	292
	293	#define IP_FW_PORT_DYNT_FLAG 0x10000
	294	#define IP_FW_PORT_TEE_FLAG 0x20000
	295	#define IP_FW_PORT_DENY_FLAG 0x40000
1c79356b A	296
	297	/*
	298	* Function definitions.
	299	*/
	300	void ip_fw_init __P((void));
	301
	302	/* Firewall hooks */
	303	struct ip;
	304	struct sockopt;
	305	typedef int ip_fw_chk_t __P((struct ip *, int, struct ifnet , u_int16_t *,
	306	struct mbuf , struct ip_fw_chain , struct sockaddr_in **));
	307	typedef int ip_fw_ctl_t __P((struct sockopt *));
	308	extern ip_fw_chk_t *ip_fw_chk_ptr;
	309	extern ip_fw_ctl_t *ip_fw_ctl_ptr;
9bccf70c A	310	extern int fw_one_pass;
	311	extern int fw_enable;
	312	extern struct ipfw_flow_id last_pkt ;
	313	#endif /* __APPLE_API_PRIVATE */
1c79356b A	314	#endif /* KERNEL */
	315
	316	#endif /* _IP_FW_H */