/*
 * Copyright (c) 1982, 1986, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)in_pcb.h	8.1 (Berkeley) 06/10/93
 */

/*
 * 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 {
	struct	inpcb *inp_next,*inp_prev;
					/* pointers to other pcb's */
	struct	inpcb *inp_head;	/* pointer back to chain of inpcb's
					   for this protocol */
	struct	in_addr inp_faddr;	/* foreign host table entry */
	u_short	inp_fport;		/* foreign port */
	struct	in_addr inp_laddr;	/* local host table entry */
	u_short	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 */
};

/* 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	INPLOOKUP_WILDCARD	1
#define	INPLOOKUP_SETLOCAL	2

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

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