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 /*
    3  * ng_bpf.h
    4  *
    5  * Copyright (c) 1996-1999 Whistle Communications, Inc.
    6  * All rights reserved.
    7  * 
    8  * Subject to the following obligations and disclaimer of warranty, use and
    9  * redistribution of this software, in source or object code forms, with or
   10  * without modifications are expressly permitted by Whistle Communications;
   11  * provided, however, that:
   12  * 1. Any and all reproductions of the source or object code must include the
   13  *    copyright notice above and the following disclaimer of warranties; and
   14  * 2. No rights are granted, in any manner or form, to use Whistle
   15  *    Communications, Inc. trademarks, including the mark "WHISTLE
   16  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
   17  *    such appears in the above copyright notice or in the software.
   18  * 
   19  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
   20  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
   21  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
   22  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
   23  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
   24  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANBPF, OR MAKE ANY
   25  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
   26  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
   27  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
   28  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
   29  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   30  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
   31  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
   32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   34  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
   35  * OF SUCH DAMAGE.
   36  *
   37  * Author: Archie Cobbs <archie@freebsd.org>
   38  *
   39  * $FreeBSD: stable/4/sys/netgraph/ng_bpf.h 99312 2002-07-02 23:44:03Z archie $
   40  * $Whistle: ng_bpf.h,v 1.3 1999/12/03 20:30:23 archie Exp $
   41  */
   42 
   43 #ifndef _NETGRAPH_BPF_H_
   44 #define _NETGRAPH_BPF_H_
   45 
   46 /* Node type name and magic cookie */
   47 #define NG_BPF_NODE_TYPE        "bpf"
   48 #define NGM_BPF_COOKIE          944100792
   49 
   50 /* Program structure for one hook */
   51 struct ng_bpf_hookprog {
   52         char            thisHook[NG_HOOKLEN+1];         /* name of hook */
   53         char            ifMatch[NG_HOOKLEN+1];          /* match dest hook */
   54         char            ifNotMatch[NG_HOOKLEN+1];       /* !match dest hook */
   55         int32_t         bpf_prog_len;                   /* #isns in program */
   56         struct bpf_insn bpf_prog[0];                    /* bpf program */
   57 };
   58 
   59 #define NG_BPF_HOOKPROG_SIZE(numInsn)   \
   60         (sizeof(struct ng_bpf_hookprog) + (numInsn) * sizeof(struct bpf_insn))
   61 
   62 /* Keep this in sync with the above structure definition */
   63 #define NG_BPF_HOOKPROG_TYPE_INFO(bptype)       {               \
   64           { "thisHook",         &ng_parse_hookbuf_type  },      \
   65           { "ifMatch",          &ng_parse_hookbuf_type  },      \
   66           { "ifNotMatch",       &ng_parse_hookbuf_type  },      \
   67           { "bpf_prog_len",     &ng_parse_int32_type    },      \
   68           { "bpf_prog",         (bptype)                },      \
   69           { NULL }                                              \
   70 }
   71 
   72 /* Statistics structure for one hook */
   73 struct ng_bpf_hookstat {
   74         u_int64_t       recvFrames;
   75         u_int64_t       recvOctets;
   76         u_int64_t       recvMatchFrames;
   77         u_int64_t       recvMatchOctets;
   78         u_int64_t       xmitFrames;
   79         u_int64_t       xmitOctets;
   80 };
   81 
   82 /* Keep this in sync with the above structure definition */
   83 #define NG_BPF_HOOKSTAT_TYPE_INFO       {                       \
   84           { "recvFrames",       &ng_parse_uint64_type   },      \
   85           { "recvOctets",       &ng_parse_uint64_type   },      \
   86           { "recvMatchFrames",  &ng_parse_uint64_type   },      \
   87           { "recvMatchOctets",  &ng_parse_uint64_type   },      \
   88           { "xmitFrames",       &ng_parse_uint64_type   },      \
   89           { "xmitOctets",       &ng_parse_uint64_type   },      \
   90           { NULL }                                              \
   91 }
   92 
   93 /* Netgraph commands */
   94 enum {
   95         NGM_BPF_SET_PROGRAM = 1,        /* supply a struct ng_bpf_hookprog */
   96         NGM_BPF_GET_PROGRAM,            /* returns a struct ng_bpf_hookprog */
   97         NGM_BPF_GET_STATS,              /* supply name as char[NG_HOOKLEN+1] */
   98         NGM_BPF_CLR_STATS,              /* supply name as char[NG_HOOKLEN+1] */
   99         NGM_BPF_GETCLR_STATS,           /* supply name as char[NG_HOOKLEN+1] */
  100 };
  101 
  102 #endif /* _NETGRAPH_BPF_H_ */

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