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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1982, 1986, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)in_pcb.h	8.1 (Berkeley) 6/10/93
 * $FreeBSD: src/sys/netinet/in_pcb.h,v 1.32.2.4 2001/08/13 16:26:17 ume Exp $
 */

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

#include <sys/queue.h>


#include <netinet6/ipsec.h> /* for IPSEC */

#ifdef __APPLE_API_PRIVATE

#define	in6pcb		inpcb	/* for KAME src sync over BSD*'s */
#define	in6p_sp		inp_sp	/* for KAME src sync over BSD*'s */

/*
 * Common structure pcb for internet protocol implementation.
 * Here are stored pointers to local and foreign host table
 * entries, local and foreign socket numbers, and pointers
 * up (to a socket structure) and down (to a protocol-specific)
 * control block.
 */
LIST_HEAD(inpcbhead, inpcb);
LIST_HEAD(inpcbporthead, inpcbport);
typedef	u_quad_t	inp_gen_t;

/*
 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
 * So, AF_INET6 null laddr is also used as AF_INET null laddr,
 * by utilize following structure. (At last, same as INRIA)
 */
struct in_addr_4in6 {
	u_int32_t	ia46_pad32[3];
	struct	in_addr	ia46_addr4;
};

/*
 * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
 * of the structure.  Therefore, it is important that the members in
 * that position not contain any information which is required to be
 * stable.
 */
struct	icmp6_filter;

struct inpcb {
	LIST_ENTRY(inpcb) inp_hash;	/* hash list */
	struct	in_addr inp_faddr;	/* foreign host table entry */
	struct	in_addr inp_laddr;	/* local host table entry */
	u_short	inp_fport;		/* foreign port */
	u_short	inp_lport;		/* local port */
	LIST_ENTRY(inpcb) inp_list;	/* list for all PCBs of this proto */
	caddr_t	inp_ppcb;		/* pointer to per-protocol pcb */
	struct	inpcbinfo *inp_pcbinfo;	/* PCB list info */
	struct	socket *inp_socket;	/* back pointer to socket */
	u_char	nat_owner;		/* Used to NAT TCP/UDP traffic */
	u_long  nat_cookie;		/* Cookie stored and returned to NAT */
	LIST_ENTRY(inpcb) inp_portlist;	/* list for this PCB's local port */
	struct	inpcbport *inp_phd;	/* head of this list */
	inp_gen_t inp_gencnt;		/* generation count of this instance */
	int	inp_flags;		/* generic IP/datagram flags */
	u_int32_t inp_flow;

	u_char	inp_vflag;
#define INP_IPV4	0x1
#define INP_IPV6	0x2

	u_char inp_ip_ttl;		/* time to live proto */
	u_char inp_ip_p;		/* protocol proto */
	/* protocol dependent part */
	union {
		/* foreign host table entry */
		struct	in_addr_4in6 inp46_foreign;
		struct	in6_addr inp6_foreign;
	} inp_dependfaddr;
	union {
		/* local host table entry */
		struct	in_addr_4in6 inp46_local;
		struct	in6_addr inp6_local;
	} inp_dependladdr;
	union {
		/* placeholder for routing entry */
		struct	route inp4_route;
		struct	route_in6 inp6_route;
	} inp_dependroute;
	struct {
		/* type of service proto */
		u_char inp4_ip_tos;
		/* IP options */
		struct mbuf *inp4_options;
		/* IP multicast options */
		struct ip_moptions *inp4_moptions;
	} inp_depend4;
#define	inp_faddr	inp_dependfaddr.inp46_foreign.ia46_addr4
#define	inp_laddr	inp_dependladdr.inp46_local.ia46_addr4
#define	inp_route	inp_dependroute.inp4_route
#define	inp_ip_tos	inp_depend4.inp4_ip_tos
#define	inp_options	inp_depend4.inp4_options
#define	inp_moptions	inp_depend4.inp4_moptions
	struct {
		/* IP options */
		struct mbuf *inp6_options;
		u_int8_t	inp6_hlim;
		u_int8_t	unused_uint8_1;
		ushort	unused_uint16_1;
		/* IP6 options for outgoing packets */
		struct	ip6_pktopts *inp6_outputopts;
		/* IP multicast options */
		struct	ip6_moptions *inp6_moptions;
		/* ICMPv6 code type filter */
		struct	icmp6_filter *inp6_icmp6filt;
		/* IPV6_CHECKSUM setsockopt */
		int	inp6_cksum;
		u_short	inp6_ifindex;
		short	inp6_hops;
	} inp_depend6;
#define	in6p_faddr	inp_dependfaddr.inp6_foreign
#define	in6p_laddr	inp_dependladdr.inp6_local
#define	in6p_route	inp_dependroute.inp6_route
#define	in6p_ip6_hlim	inp_depend6.inp6_hlim
#define	in6p_hops	inp_depend6.inp6_hops	/* default hop limit */
#define	in6p_ip6_nxt	inp_ip_p
#define	in6p_flowinfo	inp_flow
#define	in6p_vflag	inp_vflag
#define	in6p_options	inp_depend6.inp6_options
#define	in6p_outputopts	inp_depend6.inp6_outputopts
#define	in6p_moptions	inp_depend6.inp6_moptions
#define	in6p_icmp6filt	inp_depend6.inp6_icmp6filt
#define	in6p_cksum	inp_depend6.inp6_cksum
#define	inp6_ifindex	inp_depend6.inp6_ifindex
#define	in6p_flags	inp_flags  /* for KAME src sync over BSD*'s */
#define	in6p_socket	inp_socket  /* for KAME src sync over BSD*'s */
#define	in6p_lport	inp_lport  /* for KAME src sync over BSD*'s */
#define	in6p_fport	inp_fport  /* for KAME src sync over BSD*'s */
#define	in6p_ppcb	inp_ppcb  /* for KAME src sync over BSD*'s */

	int	hash_element;           /* Array index of pcb's hash list    */
	caddr_t inp_saved_ppcb;		/* place to save pointer while cached */
	struct inpcbpolicy *inp_sp;
	u_long	reserved[3];		/* For future use */
};
#endif /* __APPLE_API_PRIVATE */
/*
 * The range of the generation count, as used in this implementation,
 * is 9e19.  We would have to create 300 billion connections per
 * second for this number to roll over in a year.  This seems sufficiently
 * unlikely that we simply don't concern ourselves with that possibility.
 */

/*
 * Interface exported to userland by various protocols which use
 * inpcbs.  Hack alert -- only define if struct xsocket is in scope.
 */
#ifdef _SYS_SOCKETVAR_H_
struct	xinpcb {
	size_t	xi_len;		/* length of this structure */
	struct	inpcb xi_inp;
	struct	xsocket xi_socket;
	u_quad_t	xi_alignment_hack;
};

struct	xinpgen {
	size_t	xig_len;	/* length of this structure */
	u_int	xig_count;	/* number of PCBs at this time */
	inp_gen_t xig_gen;	/* generation count at this time */
	so_gen_t xig_sogen;	/* socket generation count at this time */
};
#endif /* _SYS_SOCKETVAR_H_ */

#ifdef __APPLE_API_PRIVATE
struct inpcbport {
	LIST_ENTRY(inpcbport) phd_hash;
	struct inpcbhead phd_pcblist;
	u_short phd_port;
};

struct inpcbinfo {		/* XXX documentation, prefixes */
	struct	inpcbhead *hashbase;
#ifdef __APPLE__
	u_long	hashsize; /* in elements */
#endif
	u_long	hashmask;
	struct	inpcbporthead *porthashbase;
	u_long	porthashmask;
	struct	inpcbhead *listhead;
	u_short	lastport;
	u_short	lastlow;
	u_short	lasthi;
	void   *ipi_zone; /* zone to allocate pcbs from */
	u_int	ipi_count;	/* number of pcbs in this list */
	u_quad_t ipi_gencnt;	/* current generation count */
#ifdef __APPLE__
     	u_char   all_owners;
     	struct	socket nat_dummy_socket;
	struct	inpcb *last_pcb;
     	caddr_t  dummy_cb;
#endif
};

#define INP_PCBHASH(faddr, lport, fport, mask) \
	(((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
#define INP_PCBPORTHASH(lport, mask) \
	(ntohs((lport)) & (mask))

/* flags in inp_flags: */
#define	INP_RECVOPTS		0x01	/* receive incoming IP options */
#define	INP_RECVRETOPTS		0x02	/* receive IP options for reply */
#define	INP_RECVDSTADDR		0x04	/* receive IP dst address */
#define	INP_HDRINCL		0x08	/* user supplies entire IP header */
#define	INP_HIGHPORT		0x10	/* user wants "high" port binding */
#define	INP_LOWPORT		0x20	/* user wants "low" port binding */
#define	INP_ANONPORT		0x40	/* port chosen for user */
#define	INP_RECVIF		0x80	/* receive incoming interface */
#define	INP_MTUDISC		0x100	/* user can do MTU discovery */
#ifdef __APPLE__
#define INP_STRIPHDR	0x200	/* Strip headers in raw_ip, for OT support */
#endif
#define	INP_FAITH		0x400	/* accept FAITH'ed connections */

#define IN6P_IPV6_V6ONLY	0x008000 /* restrict AF_INET6 socket for v6 */

#define	IN6P_PKTINFO		0x010000 /* receive IP6 dst and I/F */
#define	IN6P_HOPLIMIT		0x020000 /* receive hoplimit */
#define	IN6P_HOPOPTS		0x040000 /* receive hop-by-hop options */
#define	IN6P_DSTOPTS		0x080000 /* receive dst options after rthdr */
#define	IN6P_RTHDR		0x100000 /* receive routing header */
#define	IN6P_RTHDRDSTOPTS	0x200000 /* receive dstoptions before rthdr */
#define IN6P_AUTOFLOWLABEL	0x800000 /* attach flowlabel automatically */
#define	IN6P_BINDV6ONLY		0x10000000 /* do not grab IPv4 traffic */

#define	INP_CONTROLOPTS		(INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
					INP_RECVIF|\
				 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
				 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
				 IN6P_AUTOFLOWLABEL)
#define	INP_UNMAPPABLEOPTS	(IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\
				 IN6P_AUTOFLOWLABEL)

 /* for KAME src sync over BSD*'s */
#define	IN6P_HIGHPORT		INP_HIGHPORT
#define	IN6P_LOWPORT		INP_LOWPORT
#define	IN6P_ANONPORT		INP_ANONPORT
#define	IN6P_RECVIF		INP_RECVIF
#define	IN6P_MTUDISC		INP_MTUDISC
#define	IN6P_FAITH		INP_FAITH
#define	IN6P_CONTROLOPTS INP_CONTROLOPTS
	/*
	 * socket AF version is {newer than,or include}
	 * actual datagram AF version
	 */

#define	INPLOOKUP_WILDCARD	1
#ifdef __APPLE__
#define INPCB_ALL_OWNERS	0xff
#define INPCB_NO_OWNER		0x0
#define INPCB_OWNED_BY_X	0x80
#define INPCB_MAX_IDS		7
#endif

#define	sotoinpcb(so)	((struct inpcb *)(so)->so_pcb)
#define	sotoin6pcb(so)	sotoinpcb(so) /* for KAME src sync over BSD*'s */

#define	INP_SOCKAF(so) so->so_proto->pr_domain->dom_family

#define	INP_CHECK_SOCKAF(so, af) 	(INP_SOCKAF(so) == af)

#ifdef KERNEL
extern int	ipport_lowfirstauto;
extern int	ipport_lowlastauto;
extern int	ipport_firstauto;
extern int	ipport_lastauto;
extern int	ipport_hifirstauto;
extern int	ipport_hilastauto;

void	in_pcbpurgeif0 __P((struct inpcb *, struct ifnet *));
void	in_losing __P((struct inpcb *));
void	in_rtchange __P((struct inpcb *, int));
int	in_pcballoc __P((struct socket *, struct inpcbinfo *, struct proc *));
int	in_pcbbind __P((struct inpcb *, struct sockaddr *, struct proc *));
int	in_pcbconnect __P((struct inpcb *, struct sockaddr *, struct proc *));
void	in_pcbdetach __P((struct inpcb *));
void	in_pcbdisconnect __P((struct inpcb *));
int	in_pcbinshash __P((struct inpcb *));
int	in_pcbladdr __P((struct inpcb *, struct sockaddr *,
	    struct sockaddr_in **));
struct inpcb *
	in_pcblookup_local __P((struct inpcbinfo *,
	    struct in_addr, u_int, int));
struct inpcb *
	in_pcblookup_hash __P((struct inpcbinfo *,
			       struct in_addr, u_int, struct in_addr, u_int,
			       int, struct ifnet *));
void	in_pcbnotifyall __P((struct inpcbhead *, struct in_addr,
	    int, void (*)(struct inpcb *, int)));
void	in_pcbrehash __P((struct inpcb *));
int	in_setpeeraddr __P((struct socket *so, struct sockaddr **nam));
int	in_setsockaddr __P((struct socket *so, struct sockaddr **nam));

#ifdef __APPLE__
int	
in_pcb_grab_port  __P((struct inpcbinfo *pcbinfo,
		       u_short		options,
		       struct in_addr	laddr, 
		       u_short		*lport,  
		       struct in_addr	faddr,
		       u_short		fport,
		       u_int		cookie, 
		       u_char		owner_id));

int	
in_pcb_letgo_port __P((struct inpcbinfo *pcbinfo, 
		       struct in_addr laddr, 
		       u_short lport,
		       struct in_addr faddr,
		       u_short fport, u_char owner_id));

u_char
in_pcb_get_owner __P((struct inpcbinfo *pcbinfo, 
		      struct in_addr laddr, 
		      u_short lport, 
		      struct in_addr faddr,
		      u_short fport,
		      u_int *cookie));

void in_pcb_nat_init(struct inpcbinfo *pcbinfo, int afamily, int pfamily,
		     int protocol);

int
in_pcb_new_share_client(struct inpcbinfo *pcbinfo, u_char *owner_id);

int
in_pcb_rem_share_client(struct inpcbinfo *pcbinfo, u_char owner_id);
#endif /* __APPLE__ */

void	in_pcbremlists __P((struct inpcb *inp));
#ifndef __APPLE__
int	prison_xinpcb __P((struct proc *p, struct inpcb *inp));
#endif
#endif /* _KERNEL */
#endif /* __APPLE_API_PRIVATE */

#endif /* !_NETINET_IN_PCB_H_ */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
43866e37	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
43866e37 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
43866e37 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1982, 1986, 1990, 1993
	27	* The Regents of the University of California. All rights reserved.
	28	*
	29	* Redistribution and use in source and binary forms, with or without
	30	* modification, are permitted provided that the following conditions
	31	* are met:
	32	* 1. Redistributions of source code must retain the above copyright
	33	* notice, this list of conditions and the following disclaimer.
	34	* 2. Redistributions in binary form must reproduce the above copyright
	35	* notice, this list of conditions and the following disclaimer in the
	36	* documentation and/or other materials provided with the distribution.
	37	* 3. All advertising materials mentioning features or use of this software
	38	* must display the following acknowledgement:
	39	* This product includes software developed by the University of
	40	* California, Berkeley and its contributors.
	41	* 4. Neither the name of the University nor the names of its contributors
	42	* may be used to endorse or promote products derived from this software
	43	* without specific prior written permission.
	44	*
	45	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	46	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	47	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	48	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	49	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	50	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	51	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	52	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	53	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	54	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	55	* SUCH DAMAGE.
	56	*
	57	* @(#)in_pcb.h 8.1 (Berkeley) 6/10/93
9bccf70c	58	* $FreeBSD: src/sys/netinet/in_pcb.h,v 1.32.2.4 2001/08/13 16:26:17 ume Exp $
1c79356b A	59	*/
	60
	61	#ifndef _NETINET_IN_PCB_H_
	62	#define _NETINET_IN_PCB_H_
9bccf70c	63	#include <sys/appleapiopts.h>
1c79356b A	64
1c79356b A	65	#include <sys/queue.h>
1c79356b	66
9bccf70c A	67
	68	#include <netinet6/ipsec.h> /* for IPSEC */
	69
	70	#ifdef __APPLE_API_PRIVATE
	71
	72	#define in6pcb inpcb /* for KAME src sync over BSD's /
	73	#define in6p_sp inp_sp /* for KAME src sync over BSD's /
1c79356b A	74
	75	/*
	76	* Common structure pcb for internet protocol implementation.
	77	* Here are stored pointers to local and foreign host table
	78	* entries, local and foreign socket numbers, and pointers
	79	* up (to a socket structure) and down (to a protocol-specific)
	80	* control block.
	81	*/
	82	LIST_HEAD(inpcbhead, inpcb);
	83	LIST_HEAD(inpcbporthead, inpcbport);
	84	typedef u_quad_t inp_gen_t;
	85
	86	/*
	87	* PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
	88	* So, AF_INET6 null laddr is also used as AF_INET null laddr,
	89	* by utilize following structure. (At last, same as INRIA)
	90	*/
	91	struct in_addr_4in6 {
9bccf70c A	92	u_int32_t ia46_pad32[3];
9bccf70c A	93	struct in_addr ia46_addr4;
1c79356b A	94	};
	95
	96	/*
	97	* NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
	98	* of the structure. Therefore, it is important that the members in
	99	* that position not contain any information which is required to be
	100	* stable.
	101	*/
9bccf70c	102	struct icmp6_filter;
1c79356b A	103
	104	struct inpcb {
	105	LIST_ENTRY(inpcb) inp_hash; /* hash list */
	106	struct in_addr inp_faddr; /* foreign host table entry */
	107	struct in_addr inp_laddr; /* local host table entry */
	108	u_short inp_fport; /* foreign port */
	109	u_short inp_lport; /* local port */
	110	LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */
	111	caddr_t inp_ppcb; /* pointer to per-protocol pcb */
	112	struct inpcbinfo inp_pcbinfo; / PCB list info */
	113	struct socket inp_socket; / back pointer to socket */
	114	u_char nat_owner; /* Used to NAT TCP/UDP traffic */
	115	u_long nat_cookie; /* Cookie stored and returned to NAT */
	116	LIST_ENTRY(inpcb) inp_portlist; /* list for this PCB's local port */
	117	struct inpcbport inp_phd; / head of this list */
	118	inp_gen_t inp_gencnt; /* generation count of this instance */
	119	int inp_flags; /* generic IP/datagram flags */
	120	u_int32_t inp_flow;
	121
	122	u_char inp_vflag;
	123	#define INP_IPV4 0x1
	124	#define INP_IPV6 0x2
	125
	126	u_char inp_ip_ttl; /* time to live proto */
	127	u_char inp_ip_p; /* protocol proto */
	128	/* protocol dependent part */
	129	union {
	130	/* foreign host table entry */
9bccf70c A	131	struct in_addr_4in6 inp46_foreign;
9bccf70c A	132	struct in6_addr inp6_foreign;
1c79356b A	133	} inp_dependfaddr;
	134	union {
	135	/* local host table entry */
9bccf70c A	136	struct in_addr_4in6 inp46_local;
9bccf70c A	137	struct in6_addr inp6_local;
1c79356b A	138	} inp_dependladdr;
	139	union {
	140	/* placeholder for routing entry */
9bccf70c A	141	struct route inp4_route;
9bccf70c A	142	struct route_in6 inp6_route;
1c79356b A	143	} inp_dependroute;
	144	struct {
	145	/* type of service proto */
	146	u_char inp4_ip_tos;
	147	/* IP options */
	148	struct mbuf *inp4_options;
	149	/* IP multicast options */
	150	struct ip_moptions *inp4_moptions;
	151	} inp_depend4;
9bccf70c A	152	#define inp_faddr inp_dependfaddr.inp46_foreign.ia46_addr4
	153	#define inp_laddr inp_dependladdr.inp46_local.ia46_addr4
	154	#define inp_route inp_dependroute.inp4_route
	155	#define inp_ip_tos inp_depend4.inp4_ip_tos
	156	#define inp_options inp_depend4.inp4_options
	157	#define inp_moptions inp_depend4.inp4_moptions
1c79356b A	158	struct {
	159	/* IP options */
	160	struct mbuf *inp6_options;
9bccf70c A	161	u_int8_t inp6_hlim;
	162	u_int8_t unused_uint8_1;
	163	ushort unused_uint16_1;
1c79356b	164	/* IP6 options for outgoing packets */
9bccf70c	165	struct ip6_pktopts *inp6_outputopts;
1c79356b	166	/* IP multicast options */
9bccf70c	167	struct ip6_moptions *inp6_moptions;
1c79356b	168	/* ICMPv6 code type filter */
9bccf70c	169	struct icmp6_filter *inp6_icmp6filt;
1c79356b	170	/* IPV6_CHECKSUM setsockopt */
9bccf70c	171	int inp6_cksum;
1c79356b A	172	u_short inp6_ifindex;
	173	short inp6_hops;
	174	} inp_depend6;
9bccf70c A	175	#define in6p_faddr inp_dependfaddr.inp6_foreign
	176	#define in6p_laddr inp_dependladdr.inp6_local
	177	#define in6p_route inp_dependroute.inp6_route
	178	#define in6p_ip6_hlim inp_depend6.inp6_hlim
	179	#define in6p_hops inp_depend6.inp6_hops /* default hop limit */
	180	#define in6p_ip6_nxt inp_ip_p
	181	#define in6p_flowinfo inp_flow
	182	#define in6p_vflag inp_vflag
	183	#define in6p_options inp_depend6.inp6_options
	184	#define in6p_outputopts inp_depend6.inp6_outputopts
	185	#define in6p_moptions inp_depend6.inp6_moptions
	186	#define in6p_icmp6filt inp_depend6.inp6_icmp6filt
	187	#define in6p_cksum inp_depend6.inp6_cksum
	188	#define inp6_ifindex inp_depend6.inp6_ifindex
	189	#define in6p_flags inp_flags /* for KAME src sync over BSD's /
	190	#define in6p_socket inp_socket /* for KAME src sync over BSD's /
	191	#define in6p_lport inp_lport /* for KAME src sync over BSD's /
	192	#define in6p_fport inp_fport /* for KAME src sync over BSD's /
	193	#define in6p_ppcb inp_ppcb /* for KAME src sync over BSD's /
	194
1c79356b A	195	int hash_element; /* Array index of pcb's hash list */
1c79356b A	196	caddr_t inp_saved_ppcb; /* place to save pointer while cached */
9bccf70c A	197	struct inpcbpolicy *inp_sp;
9bccf70c A	198	u_long reserved[3]; /* For future use */
1c79356b	199	};
9bccf70c	200	#endif /* __APPLE_API_PRIVATE */
1c79356b A	201	/*
	202	* The range of the generation count, as used in this implementation,
	203	* is 9e19. We would have to create 300 billion connections per
	204	* second for this number to roll over in a year. This seems sufficiently
	205	* unlikely that we simply don't concern ourselves with that possibility.
	206	*/
	207
	208	/*
	209	* Interface exported to userland by various protocols which use
	210	* inpcbs. Hack alert -- only define if struct xsocket is in scope.
	211	*/
	212	#ifdef _SYS_SOCKETVAR_H_
	213	struct xinpcb {
	214	size_t xi_len; /* length of this structure */
	215	struct inpcb xi_inp;
	216	struct xsocket xi_socket;
	217	u_quad_t xi_alignment_hack;
	218	};
	219
	220	struct xinpgen {
	221	size_t xig_len; /* length of this structure */
	222	u_int xig_count; /* number of PCBs at this time */
	223	inp_gen_t xig_gen; /* generation count at this time */
	224	so_gen_t xig_sogen; /* socket generation count at this time */
	225	};
	226	#endif /* _SYS_SOCKETVAR_H_ */
	227
9bccf70c	228	#ifdef __APPLE_API_PRIVATE
1c79356b A	229	struct inpcbport {
	230	LIST_ENTRY(inpcbport) phd_hash;
	231	struct inpcbhead phd_pcblist;
	232	u_short phd_port;
	233	};
	234
	235	struct inpcbinfo { /* XXX documentation, prefixes */
	236	struct inpcbhead *hashbase;
9bccf70c	237	#ifdef __APPLE__
1c79356b	238	u_long hashsize; /* in elements */
9bccf70c	239	#endif
1c79356b A	240	u_long hashmask;
	241	struct inpcbporthead *porthashbase;
	242	u_long porthashmask;
	243	struct inpcbhead *listhead;
	244	u_short lastport;
	245	u_short lastlow;
	246	u_short lasthi;
	247	void ipi_zone; / zone to allocate pcbs from */
	248	u_int ipi_count; /* number of pcbs in this list */
	249	u_quad_t ipi_gencnt; /* current generation count */
9bccf70c A	250	#ifdef __APPLE__
	251	u_char all_owners;
	252	struct socket nat_dummy_socket;
1c79356b	253	struct inpcb *last_pcb;
9bccf70c A	254	caddr_t dummy_cb;
9bccf70c A	255	#endif
1c79356b A	256	};
	257
	258	#define INP_PCBHASH(faddr, lport, fport, mask) \
	259	(((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
	260	#define INP_PCBPORTHASH(lport, mask) \
	261	(ntohs((lport)) & (mask))
	262
	263	/* flags in inp_flags: */
	264	#define INP_RECVOPTS 0x01 /* receive incoming IP options */
	265	#define INP_RECVRETOPTS 0x02 /* receive IP options for reply */
	266	#define INP_RECVDSTADDR 0x04 /* receive IP dst address */
	267	#define INP_HDRINCL 0x08 /* user supplies entire IP header */
	268	#define INP_HIGHPORT 0x10 /* user wants "high" port binding */
	269	#define INP_LOWPORT 0x20 /* user wants "low" port binding */
	270	#define INP_ANONPORT 0x40 /* port chosen for user */
	271	#define INP_RECVIF 0x80 /* receive incoming interface */
	272	#define INP_MTUDISC 0x100 /* user can do MTU discovery */
9bccf70c A	273	#ifdef __APPLE__
	274	#define INP_STRIPHDR 0x200 /* Strip headers in raw_ip, for OT support */
	275	#endif
	276	#define INP_FAITH 0x400 /* accept FAITH'ed connections */
	277
	278	#define IN6P_IPV6_V6ONLY 0x008000 /* restrict AF_INET6 socket for v6 */
	279
	280	#define IN6P_PKTINFO 0x010000 /* receive IP6 dst and I/F */
	281	#define IN6P_HOPLIMIT 0x020000 /* receive hoplimit */
	282	#define IN6P_HOPOPTS 0x040000 /* receive hop-by-hop options */
	283	#define IN6P_DSTOPTS 0x080000 /* receive dst options after rthdr */
	284	#define IN6P_RTHDR 0x100000 /* receive routing header */
	285	#define IN6P_RTHDRDSTOPTS 0x200000 /* receive dstoptions before rthdr */
	286	#define IN6P_AUTOFLOWLABEL 0x800000 /* attach flowlabel automatically */
	287	#define IN6P_BINDV6ONLY 0x10000000 /* do not grab IPv4 traffic */
1c79356b A	288
	289	#define INP_CONTROLOPTS (INP_RECVOPTS\|INP_RECVRETOPTS\|INP_RECVDSTADDR\|\
	290	INP_RECVIF\|\
	291	IN6P_PKTINFO\|IN6P_HOPLIMIT\|IN6P_HOPOPTS\|\
9bccf70c A	292	IN6P_DSTOPTS\|IN6P_RTHDR\|IN6P_RTHDRDSTOPTS\|\
	293	IN6P_AUTOFLOWLABEL)
	294	#define INP_UNMAPPABLEOPTS (IN6P_HOPOPTS\|IN6P_DSTOPTS\|IN6P_RTHDR\|\
	295	IN6P_AUTOFLOWLABEL)
1c79356b A	296
	297	/* for KAME src sync over BSD's /
	298	#define IN6P_HIGHPORT INP_HIGHPORT
	299	#define IN6P_LOWPORT INP_LOWPORT
	300	#define IN6P_ANONPORT INP_ANONPORT
	301	#define IN6P_RECVIF INP_RECVIF
	302	#define IN6P_MTUDISC INP_MTUDISC
	303	#define IN6P_FAITH INP_FAITH
9bccf70c	304	#define IN6P_CONTROLOPTS INP_CONTROLOPTS
1c79356b	305	/*
9bccf70c	306	* socket AF version is {newer than,or include}
1c79356b A	307	* actual datagram AF version
	308	*/
	309
	310	#define INPLOOKUP_WILDCARD 1
9bccf70c	311	#ifdef __APPLE__
1c79356b A	312	#define INPCB_ALL_OWNERS 0xff
	313	#define INPCB_NO_OWNER 0x0
	314	#define INPCB_OWNED_BY_X 0x80
	315	#define INPCB_MAX_IDS 7
9bccf70c	316	#endif
1c79356b A	317
	318	#define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
	319	#define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD's /
	320
9bccf70c	321	#define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
1c79356b	322
9bccf70c	323	#define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af)
1c79356b A	324
1c79356b A	325	#ifdef KERNEL
9bccf70c A	326	extern int ipport_lowfirstauto;
	327	extern int ipport_lowlastauto;
	328	extern int ipport_firstauto;
	329	extern int ipport_lastauto;
	330	extern int ipport_hifirstauto;
	331	extern int ipport_hilastauto;
	332
	333	void in_pcbpurgeif0 __P((struct inpcb , struct ifnet ));
1c79356b	334	void in_losing __P((struct inpcb *));
9bccf70c	335	void in_rtchange __P((struct inpcb *, int));
1c79356b A	336	int in_pcballoc __P((struct socket , struct inpcbinfo , struct proc *));
	337	int in_pcbbind __P((struct inpcb , struct sockaddr , struct proc *));
	338	int in_pcbconnect __P((struct inpcb , struct sockaddr , struct proc *));
	339	void in_pcbdetach __P((struct inpcb *));
	340	void in_pcbdisconnect __P((struct inpcb *));
	341	int in_pcbinshash __P((struct inpcb *));
	342	int in_pcbladdr __P((struct inpcb , struct sockaddr ,
	343	struct sockaddr_in **));
	344	struct inpcb *
	345	in_pcblookup_local __P((struct inpcbinfo *,
	346	struct in_addr, u_int, int));
	347	struct inpcb *
	348	in_pcblookup_hash __P((struct inpcbinfo *,
9bccf70c A	349	struct in_addr, u_int, struct in_addr, u_int,
	350	int, struct ifnet *));
	351	void in_pcbnotifyall __P((struct inpcbhead *, struct in_addr,
	352	int, void ()(struct inpcb , int)));
1c79356b A	353	void in_pcbrehash __P((struct inpcb *));
	354	int in_setpeeraddr __P((struct socket so, struct sockaddr *nam));
	355	int in_setsockaddr __P((struct socket so, struct sockaddr *nam));
	356
9bccf70c	357	#ifdef __APPLE__
1c79356b A	358	int
	359	in_pcb_grab_port __P((struct inpcbinfo *pcbinfo,
	360	u_short options,
	361	struct in_addr laddr,
	362	u_short *lport,
	363	struct in_addr faddr,
	364	u_short fport,
	365	u_int cookie,
	366	u_char owner_id));
	367
	368	int
	369	in_pcb_letgo_port __P((struct inpcbinfo *pcbinfo,
	370	struct in_addr laddr,
	371	u_short lport,
	372	struct in_addr faddr,
	373	u_short fport, u_char owner_id));
	374
	375	u_char
	376	in_pcb_get_owner __P((struct inpcbinfo *pcbinfo,
	377	struct in_addr laddr,
	378	u_short lport,
	379	struct in_addr faddr,
	380	u_short fport,
	381	u_int *cookie));
	382
	383	void in_pcb_nat_init(struct inpcbinfo *pcbinfo, int afamily, int pfamily,
	384	int protocol);
	385
	386	int
	387	in_pcb_new_share_client(struct inpcbinfo pcbinfo, u_char owner_id);
	388
	389	int
	390	in_pcb_rem_share_client(struct inpcbinfo *pcbinfo, u_char owner_id);
9bccf70c	391	#endif /* __APPLE__ */
1c79356b A	392
1c79356b A	393	void in_pcbremlists __P((struct inpcb *inp));
9bccf70c A	394	#ifndef __APPLE__
9bccf70c A	395	int prison_xinpcb __P((struct proc p, struct inpcb inp));
1c79356b	396	#endif
9bccf70c A	397	#endif /* _KERNEL */
9bccf70c A	398	#endif /* __APPLE_API_PRIVATE */
1c79356b A	399
1c79356b A	400	#endif /* !_NETINET_IN_PCB_H_ */