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


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FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_bpf.h

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    1 /*
    2  * ng_bpf.h
    3  */
    4 
    5 /*-
    6  * Copyright (c) 1996-1999 Whistle Communications, Inc.
    7  * All rights reserved.
    8  * 
    9  * Subject to the following obligations and disclaimer of warranty, use and
   10  * redistribution of this software, in source or object code forms, with or
   11  * without modifications are expressly permitted by Whistle Communications;
   12  * provided, however, that:
   13  * 1. Any and all reproductions of the source or object code must include the
   14  *    copyright notice above and the following disclaimer of warranties; and
   15  * 2. No rights are granted, in any manner or form, to use Whistle
   16  *    Communications, Inc. trademarks, including the mark "WHISTLE
   17  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
   18  *    such appears in the above copyright notice or in the software.
   19  * 
   20  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
   21  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
   22  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
   23  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
   24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
   25  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
   26  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
   27  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
   28  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
   29  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
   30  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   31  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
   32  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
   33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   35  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
   36  * OF SUCH DAMAGE.
   37  *
   38  * Author: Archie Cobbs <archie@freebsd.org>
   39  *
   40  * $FreeBSD: releng/11.0/sys/netgraph/ng_bpf.h 141751 2005-02-12 18:10:26Z ru $
   41  * $Whistle: ng_bpf.h,v 1.3 1999/12/03 20:30:23 archie Exp $
   42  */
   43 
   44 #ifndef _NETGRAPH_NG_BPF_H_
   45 #define _NETGRAPH_NG_BPF_H_
   46 
   47 /* Node type name and magic cookie */
   48 #define NG_BPF_NODE_TYPE        "bpf"
   49 #define NGM_BPF_COOKIE          944100792
   50 
   51 /* Program structure for one hook */
   52 struct ng_bpf_hookprog {
   53         char            thisHook[NG_HOOKSIZ];           /* name of hook */
   54         char            ifMatch[NG_HOOKSIZ];            /* match dest hook */
   55         char            ifNotMatch[NG_HOOKSIZ];         /* !match dest hook */
   56         int32_t         bpf_prog_len;                   /* #insns in program */
   57         struct bpf_insn bpf_prog[];                     /* bpf program */
   58 };
   59 
   60 #define NG_BPF_HOOKPROG_SIZE(numInsn)   \
   61         (sizeof(struct ng_bpf_hookprog) + (numInsn) * sizeof(struct bpf_insn))
   62 
   63 /* Keep this in sync with the above structure definition */
   64 #define NG_BPF_HOOKPROG_TYPE_INFO(bptype)       {               \
   65           { "thisHook",         &ng_parse_hookbuf_type  },      \
   66           { "ifMatch",          &ng_parse_hookbuf_type  },      \
   67           { "ifNotMatch",       &ng_parse_hookbuf_type  },      \
   68           { "bpf_prog_len",     &ng_parse_int32_type    },      \
   69           { "bpf_prog",         (bptype)                },      \
   70           { NULL }                                              \
   71 }
   72 
   73 /* Statistics structure for one hook */
   74 struct ng_bpf_hookstat {
   75         u_int64_t       recvFrames;
   76         u_int64_t       recvOctets;
   77         u_int64_t       recvMatchFrames;
   78         u_int64_t       recvMatchOctets;
   79         u_int64_t       xmitFrames;
   80         u_int64_t       xmitOctets;
   81 };
   82 
   83 /* Keep this in sync with the above structure definition */
   84 #define NG_BPF_HOOKSTAT_TYPE_INFO       {                       \
   85           { "recvFrames",       &ng_parse_uint64_type   },      \
   86           { "recvOctets",       &ng_parse_uint64_type   },      \
   87           { "recvMatchFrames",  &ng_parse_uint64_type   },      \
   88           { "recvMatchOctets",  &ng_parse_uint64_type   },      \
   89           { "xmitFrames",       &ng_parse_uint64_type   },      \
   90           { "xmitOctets",       &ng_parse_uint64_type   },      \
   91           { NULL }                                              \
   92 }
   93 
   94 /* Netgraph commands */
   95 enum {
   96         NGM_BPF_SET_PROGRAM = 1,        /* supply a struct ng_bpf_hookprog */
   97         NGM_BPF_GET_PROGRAM,            /* returns a struct ng_bpf_hookprog */
   98         NGM_BPF_GET_STATS,              /* supply name as char[NG_HOOKSIZ] */
   99         NGM_BPF_CLR_STATS,              /* supply name as char[NG_HOOKSIZ] */
  100         NGM_BPF_GETCLR_STATS,           /* supply name as char[NG_HOOKSIZ] */
  101 };
  102 
  103 #endif /* _NETGRAPH_NG_BPF_H_ */

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