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/net/bpfdesc.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) 1990, 1991, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from the Stanford/CMU enet packet filter,
    6  * (net/enet.c) distributed as part of 4.3BSD, and code contributed
    7  * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
    8  * Berkeley Laboratory.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by the University of
   21  *      California, Berkeley and its contributors.
   22  * 4. Neither the name of the University nor the names of its contributors
   23  *    may be used to endorse or promote products derived from this software
   24  *    without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   36  * SUCH DAMAGE.
   37  *
   38  *      @(#)bpfdesc.h   8.1 (Berkeley) 6/10/93
   39  *
   40  * $FreeBSD: src/sys/net/bpfdesc.h,v 1.14.2.2 2001/12/17 19:32:33 jdp Exp $
   41  * $DragonFly: src/sys/net/bpfdesc.h,v 1.6 2008/03/14 09:52:10 matthias Exp $
   42  */
   43 
   44 #ifndef _NET_BPFDESC_H_
   45 #define _NET_BPFDESC_H_
   46 
   47 #include <sys/callout.h>
   48 #include <sys/event.h>
   49 
   50 /*
   51  * Descriptor associated with each open bpf file.
   52  */
   53 struct bpf_d {
   54         SLIST_ENTRY(bpf_d) bd_next;     /* Linked list of descriptors */
   55         /*
   56          * Buffer slots: two mbuf clusters buffer the incoming packets.
   57          *   The model has three slots.  Sbuf is always occupied.
   58          *   sbuf (store) - Receive interrupt puts packets here.
   59          *   hbuf (hold) - When sbuf is full, put cluster here and
   60          *                 wakeup read (replace sbuf with fbuf).
   61          *   fbuf (free) - When read is done, put cluster here.
   62          * On receiving, if sbuf is full and fbuf is 0, packet is dropped.
   63          */
   64         caddr_t         bd_sbuf;        /* store slot */
   65         caddr_t         bd_hbuf;        /* hold slot */
   66         caddr_t         bd_fbuf;        /* free slot */
   67         int             bd_slen;        /* current length of store buffer */
   68         int             bd_hlen;        /* current length of hold buffer */
   69 
   70         int             bd_bufsize;     /* absolute length of buffers */
   71 
   72         struct bpf_if * bd_bif;         /* interface descriptor */
   73         u_long          bd_rtout;       /* Read timeout in 'ticks' */
   74         struct bpf_insn *bd_rfilter;    /* read filter code */
   75         struct bpf_insn *bd_wfilter;    /* write filter code */
   76         u_long          bd_rcount;      /* number of packets received */
   77         u_long          bd_dcount;      /* number of packets dropped */
   78 
   79         u_char          bd_promisc;     /* true if listening promiscuously */
   80         u_char          bd_state;       /* idle, waiting, or timed out */
   81         u_char          bd_immediate;   /* true to return on packet arrival */
   82         int             bd_hdrcmplt;    /* false to fill in src lladdr automatically */
   83         int             bd_seesent;     /* true if bpf should see sent packets */
   84         int             bd_async;       /* non-zero if packet reception should generate signal */
   85         int             bd_sig;         /* signal to send upon packet reception */
   86         struct sigio *  bd_sigio;       /* information for async I/O */
   87 #if BSD < 199103
   88         u_char          bd_selcoll;     /* true if selects collide */
   89         int             bd_timedout;
   90         struct proc *   bd_selproc;     /* process that last selected us */
   91 #else
   92         u_char          bd_pad;         /* explicit alignment */
   93         struct kqinfo   bd_kq;          /* bsd kqueue info */
   94 #endif
   95         struct callout  bd_callout;     /* for BPF timeouts with select */
   96         int             bd_locked;      /* true if descriptor is locked */
   97 };
   98 
   99 /* Values for bd_state */
  100 #define BPF_IDLE        0               /* no select in progress */
  101 #define BPF_WAITING     1               /* waiting for read timeout in select */
  102 #define BPF_TIMED_OUT   2               /* read timeout has expired in select */
  103 
  104 /*
  105  * Descriptor associated with each attached hardware interface.
  106  */
  107 struct bpf_if {
  108         struct bpf_if *bif_next;        /* list of all interfaces */
  109         SLIST_HEAD(, bpf_d) bif_dlist;  /* descriptor list */
  110         struct bpf_if **bif_driverp;    /* pointer into softc */
  111         u_int bif_dlt;                  /* link layer type */
  112         u_int bif_hdrlen;               /* length of header (with padding) */
  113         struct ifnet *bif_ifp;          /* corresponding interface */
  114 };
  115 
  116 #endif

Cache object: c93f7a01b67f46f6ecc8b2457e711424


[ 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.