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/*

 * 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

 * $Id: in_pcb.h,v 1.2 2001-09-27 12:01:55 chris Exp $

 */

#ifndef _NETINET_IN_PCB_H_

#define _NETINET_IN_PCB_H_

#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.

 */

LIST_HEAD(inpcbhead, inpcb);

struct inpcb {

        LIST_ENTRY(inpcb) inp_list;             /* list for all PCBs of this proto */

        LIST_ENTRY(inpcb) inp_hash;             /* hash list */

        struct  inpcbinfo *inp_pcbinfo; /* PCB list info */

        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 */

        caddr_t inp_ppcb;               /* pointer to per-protocol pcb */

        struct  socket *inp_socket;     /* back pointer to socket */

        struct  mbuf *inp_options;      /* IP options */

        struct  route inp_route;        /* placeholder for routing entry */

        int     inp_flags;              /* generic IP/datagram flags */

        u_char  inp_ip_tos;             /* type of service proto */

        u_char  inp_ip_ttl;             /* time to live proto */

        u_char  inp_ip_p;               /* protocol proto */

        u_char  pad[1];                 /* alignment */

        struct  ip_moptions *inp_moptions; /* IP multicast options */

#if 0 /* Someday, perhaps... */

        struct  ip inp_ip;              /* header prototype; should have more */

#endif

};

struct inpcbinfo {

        struct inpcbhead *listhead;

        struct inpcbhead *hashbase;

        unsigned long hashmask;

        unsigned short lastport;

        unsigned short lastlow;

        unsigned short lasthi;

};

#define INP_PCBHASH(faddr, lport, fport, mask) \

        (((faddr) ^ ((faddr) >> 16) ^ (lport) ^ (fport)) & (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_CONTROLOPTS         (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\

                                        INP_RECVIF)

#define INPLOOKUP_WILDCARD      1

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

#ifdef KERNEL

void     in_losing __P((struct inpcb *));

int      in_pcballoc __P((struct socket *, struct inpcbinfo *));

int      in_pcbbind __P((struct inpcb *, struct mbuf *));

int      in_pcbconnect __P((struct inpcb *, struct mbuf *));

void     in_pcbdetach __P((struct inpcb *));

void     in_pcbdisconnect __P((struct inpcb *));

int      in_pcbladdr __P((struct inpcb *, struct mbuf *,

            struct sockaddr_in **));

struct inpcb *

         in_pcblookup __P((struct inpcbinfo *,

            struct in_addr, u_int, struct in_addr, u_int, int));

struct inpcb *

         in_pcblookuphash __P((struct inpcbinfo *,

            struct in_addr, u_int, struct in_addr, u_int, int));

void     in_pcbnotify __P((struct inpcbhead *, struct sockaddr *,

            u_int, struct in_addr, u_int, int, void (*)(struct inpcb *, int)));

void     in_pcbrehash __P((struct inpcb *));

void     in_setpeeraddr __P((struct inpcb *, struct mbuf *));

void     in_setsockaddr __P((struct inpcb *, struct mbuf *));

#endif

#endif