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_etf.h

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    1 /*-
    2  * ng_etf.h
    3  */
    4 
    5 /*-
    6  * Copyright (c) 2001, FreeBSD Incorporated 
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice unmodified, this list of conditions, and the following
   14  *    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  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * Author: Julian Elischer <julian@freebsd.org>
   32  *
   33  * $FreeBSD: stable/8/sys/netgraph/ng_etf.h 199583 2009-11-20 15:27:52Z jhb $
   34  */
   35 
   36 #ifndef _NETGRAPH_NG_ETF_H_
   37 #define _NETGRAPH_NG_ETF_H_
   38 
   39 /* Node type name. This should be unique among all netgraph node types */
   40 #define NG_ETF_NODE_TYPE        "etf"
   41 
   42 /* Node type cookie. Should also be unique. This value MUST change whenever
   43    an incompatible change is made to this header file, to insure consistency.
   44    The de facto method for generating cookies is to take the output of the
   45    date command: date -u +'%s' */
   46 #define NGM_ETF_COOKIE          983084516
   47 
   48 /* Hook names */
   49 #define NG_ETF_HOOK_DOWNSTREAM  "downstream"
   50 #define NG_ETF_HOOK_NOMATCH     "nomatch"
   51 
   52 /* Netgraph commands understood by this node type */
   53 enum {
   54         NGM_ETF_SET_FLAG = 1,
   55         NGM_ETF_GET_STATUS,
   56         NGM_ETF_SET_FILTER,
   57 
   58 };
   59 
   60 /* This structure is returned by the NGM_ETF_GET_STATUS command */
   61 struct ng_etfstat {
   62         u_int32_t   packets_in;         /* packets in from downstream */
   63         u_int32_t   packets_out;        /* packets out towards downstream */
   64 };
   65 
   66 /*
   67  * This needs to be kept in sync with the above structure definition
   68  */
   69 #define NG_ETF_STATS_TYPE_INFO  {                               \
   70           { "packets_in",       &ng_parse_uint32_type   },      \
   71           { "packets_out",      &ng_parse_uint32_type   },      \
   72           { NULL }                                              \
   73 }
   74 
   75 /* This structure is returned by the NGM_ETF_GET_STATUS command */
   76 struct ng_etffilter {
   77         char            matchhook[NG_HOOKSIZ]; /* hook name */
   78         u_int16_t       ethertype;      /* this ethertype to this hook */
   79 };      
   80 
   81 /*
   82  * This needs to be kept in sync with the above structure definition
   83  */
   84 #define NG_ETF_FILTER_TYPE_INFO {                               \
   85           { "matchhook",        &ng_parse_hookbuf_type  },      \
   86           { "ethertype",        &ng_parse_uint16_type   },      \
   87           { NULL }                                              \
   88 }
   89 
   90 #endif /* _NETGRAPH_NG_ETF_H_ */

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