The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/unpcb.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*
    2  * Copyright (c) 1982, 1986, 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)unpcb.h     8.1 (Berkeley) 6/2/93
   34  * $FreeBSD: src/sys/sys/unpcb.h,v 1.3.12.1 1999/09/05 08:23:16 peter Exp $
   35  */
   36 
   37 #ifndef _SYS_UNPCB_H_
   38 #define _SYS_UNPCB_H_
   39 
   40 /*
   41  * Protocol control block for an active
   42  * instance of a UNIX internal protocol.
   43  *
   44  * A socket may be associated with an vnode in the
   45  * file system.  If so, the unp_vnode pointer holds
   46  * a reference count to this vnode, which should be irele'd
   47  * when the socket goes away.
   48  *
   49  * A socket may be connected to another socket, in which
   50  * case the control block of the socket to which it is connected
   51  * is given by unp_conn.
   52  *
   53  * A socket may be referenced by a number of sockets (e.g. several
   54  * sockets may be connected to a datagram socket.)  These sockets
   55  * are in a linked list starting with unp_refs, linked through
   56  * unp_nextref and null-terminated.  Note that a socket may be referenced
   57  * by a number of other sockets and may also reference a socket (not
   58  * necessarily one which is referencing it).  This generates
   59  * the need for unp_refs and unp_nextref to be separate fields.
   60  *
   61  * Stream sockets keep copies of receive sockbuf sb_cc and sb_mbcnt
   62  * so that changes in the sockbuf may be computed to modify
   63  * back pressure on the sender accordingly.
   64  */
   65 struct  unpcb {
   66         struct  socket *unp_socket;     /* pointer back to socket */
   67         struct  vnode *unp_vnode;       /* if associated with file */
   68         ino_t   unp_ino;                /* fake inode number */
   69         struct  unpcb *unp_conn;        /* control block of connected socket */
   70         struct  unpcb *unp_refs;        /* referencing socket linked list */
   71         struct  unpcb *unp_nextref;     /* link in unp_refs list */
   72         struct  mbuf *unp_addr;         /* bound address of socket */
   73         int     unp_cc;                 /* copy of rcv.sb_cc */
   74         int     unp_mbcnt;              /* copy of rcv.sb_mbcnt */
   75 };
   76 
   77 #define sotounpcb(so)   ((struct unpcb *)((so)->so_pcb))
   78 
   79 #endif

Cache object: 228cd9215ec3bfad016d2a94f7a1a01c


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.