usr/src/sys/netinet/in_pcb.h

/*
 * Copyright (c) 1982, 1986, 1990 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    7.6 (Berkeley) 6/28/90
 */

/*
 * 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 */
};

/* 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)

#ifdef sotorawcb
/*
 * Common structure pcb for raw internet protocol access.
 * Here are internet specific extensions to the raw control block,
 * and space is allocated to the necessary sockaddrs.
 */
struct raw_inpcb {
        struct  rawcb rinp_rcb; /* common control block prefix */
        struct  mbuf *rinp_options;     /* IP options */
        int     rinp_flags;             /* flags, e.g. raw sockopts */
#define RINPF_HDRINCL   0x1             /* user supplies entire IP header */
        struct  sockaddr_in rinp_faddr; /* foreign address */
        struct  sockaddr_in rinp_laddr; /* local address */
        struct  route rinp_route;       /* placeholder for routing entry */
};
#endif

#define INPLOOKUP_WILDCARD      1
#define INPLOOKUP_SETLOCAL      2

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

#ifdef KERNEL
struct  inpcb *in_pcblookup();
#endif