/*	$OpenBSD: in_pcb.h,v 1.3 1996/07/29 02:34:30 downsj Exp $	*/
/*	$NetBSD: in_pcb.h,v 1.14 1996/02/13 23:42:00 christos Exp $	*/

/*
 * 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
 */

#include <sys/queue.h>

/*
 * 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.
 */
struct inpcb {
	LIST_ENTRY(inpcb) inp_hash;
	CIRCLEQ_ENTRY(inpcb) inp_queue;
	struct	  inpcbtable *inp_table;
	struct	  in_addr inp_faddr;	/* foreign host table entry */
	struct	  in_addr inp_laddr;	/* local host table entry */
	u_int16_t inp_fport;		/* foreign port */
	u_int16_t inp_lport;		/* local port */
	struct	  socket *inp_socket;	/* back pointer to socket */
	caddr_t	  inp_ppcb;		/* pointer to per-protocol pcb */
	struct	  route inp_route;	/* placeholder for routing entry */
	int	  inp_flags;		/* generic IP/datagram flags */
	struct	  ip inp_ip;		/* header prototype; should have more */
	struct	  mbuf *inp_options;	/* IP options */
	struct	  ip_moptions *inp_moptions; /* IP multicast options */
};

struct inpcbtable {
	CIRCLEQ_HEAD(, inpcb) inpt_queue;
	LIST_HEAD(inpcbhead, inpcb) *inpt_hashtbl;
	u_long	  inpt_hash;
	u_int16_t inpt_lastport;
};

/* 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_CONTROLOPTS		(INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR)
#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	INPLOOKUP_WILDCARD	1
#define	INPLOOKUP_SETLOCAL	2

#define	sotoinpcb(so)	((struct inpcb *)(so)->so_pcb)

#ifdef _KERNEL
void	 in_losing __P((struct inpcb *));
int	 in_pcballoc __P((struct socket *, void *));
int	 in_pcbbind __P((void *, struct mbuf *));
int	 in_pcbconnect __P((void *, struct mbuf *));
void	 in_pcbdetach __P((void *));
void	 in_pcbdisconnect __P((void *));
struct inpcb *
	 in_pcbhashlookup __P((struct inpcbtable *, struct in_addr,
			       u_int, struct in_addr, u_int));
void	 in_pcbinit __P((struct inpcbtable *, int));
struct inpcb *
	 in_pcblookup __P((struct inpcbtable *,
	    struct in_addr, u_int, struct in_addr, u_int, int));
void	 in_pcbnotify __P((struct inpcbtable *, struct sockaddr *,
	    u_int, struct in_addr, u_int, int, void (*)(struct inpcb *, int)));
void	 in_pcbnotifyall __P((struct inpcbtable *, struct sockaddr *,
	    int, void (*)(struct inpcb *, int)));
void	 in_pcbrehash __P((struct inpcb *));
void	 in_rtchange __P((struct inpcb *, int));
void	 in_setpeeraddr __P((struct inpcb *, struct mbuf *));
void	 in_setsockaddr __P((struct inpcb *, struct mbuf *));
#endif