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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    7  *
    8  * Copyright (c) 2001, FreeBSD Incorporated 
    9  * All rights reserved.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice unmodified, this list of conditions, and the following
   16  *    disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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  * Author: Julian Elischer <julian@freebsd.org>
   34  *
   35  * $FreeBSD: releng/12.0/sys/netgraph/ng_etf.h 326272 2017-11-27 15:23:17Z pfg $
   36  */
   37 
   38 #ifndef _NETGRAPH_NG_ETF_H_
   39 #define _NETGRAPH_NG_ETF_H_
   40 
   41 /* Node type name. This should be unique among all netgraph node types */
   42 #define NG_ETF_NODE_TYPE        "etf"
   43 
   44 /* Node type cookie. Should also be unique. This value MUST change whenever
   45    an incompatible change is made to this header file, to insure consistency.
   46    The de facto method for generating cookies is to take the output of the
   47    date command: date -u +'%s' */
   48 #define NGM_ETF_COOKIE          983084516
   49 
   50 /* Hook names */
   51 #define NG_ETF_HOOK_DOWNSTREAM  "downstream"
   52 #define NG_ETF_HOOK_NOMATCH     "nomatch"
   53 
   54 /* Netgraph commands understood by this node type */
   55 enum {
   56         NGM_ETF_SET_FLAG = 1,
   57         NGM_ETF_GET_STATUS,
   58         NGM_ETF_SET_FILTER,
   59 
   60 };
   61 
   62 /* This structure is returned by the NGM_ETF_GET_STATUS command */
   63 struct ng_etfstat {
   64         u_int32_t   packets_in;         /* packets in from downstream */
   65         u_int32_t   packets_out;        /* packets out towards downstream */
   66 };
   67 
   68 /*
   69  * This needs to be kept in sync with the above structure definition
   70  */
   71 #define NG_ETF_STATS_TYPE_INFO  {                               \
   72           { "packets_in",       &ng_parse_uint32_type   },      \
   73           { "packets_out",      &ng_parse_uint32_type   },      \
   74           { NULL }                                              \
   75 }
   76 
   77 /* This structure is returned by the NGM_ETF_GET_STATUS command */
   78 struct ng_etffilter {
   79         char            matchhook[NG_HOOKSIZ]; /* hook name */
   80         u_int16_t       ethertype;      /* this ethertype to this hook */
   81 };      
   82 
   83 /*
   84  * This needs to be kept in sync with the above structure definition
   85  */
   86 #define NG_ETF_FILTER_TYPE_INFO {                               \
   87           { "matchhook",        &ng_parse_hookbuf_type  },      \
   88           { "ethertype",        &ng_parse_uint16_type   },      \
   89           { NULL }                                              \
   90 }
   91 
   92 #endif /* _NETGRAPH_NG_ETF_H_ */

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