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_patch.h

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    1 /*-
    2  * Copyright (C) 2010 by Maxim Ignatenko <gelraen.ua@gmail.com>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/9.0/sys/netgraph/ng_patch.h 208989 2010-06-10 16:45:30Z ae $
   27  */
   28 
   29 #ifndef _NETGRAPH_NG_PATCH_H_
   30 #define _NETGRAPH_NG_PATCH_H_
   31 
   32 /* Node type name. */
   33 #define NG_PATCH_NODE_TYPE      "patch"
   34 
   35 /* Node type cookie. */
   36 #define NGM_PATCH_COOKIE        1262445509
   37 
   38 /* Hook names */
   39 #define NG_PATCH_HOOK_IN        "in"
   40 #define NG_PATCH_HOOK_OUT       "out"
   41 
   42 /* Netgraph commands understood by this node type */
   43 enum {
   44         NGM_PATCH_SETCONFIG = 1,
   45         NGM_PATCH_GETCONFIG,
   46         NGM_PATCH_GET_STATS,
   47         NGM_PATCH_CLR_STATS,
   48         NGM_PATCH_GETCLR_STATS
   49 };
   50 
   51 /* Patching modes */
   52 enum {
   53         NG_PATCH_MODE_SET = 1,
   54         NG_PATCH_MODE_ADD = 2,
   55         NG_PATCH_MODE_SUB = 3,
   56         NG_PATCH_MODE_MUL = 4,
   57         NG_PATCH_MODE_DIV = 5,
   58         NG_PATCH_MODE_NEG = 6,
   59         NG_PATCH_MODE_AND = 7,
   60         NG_PATCH_MODE_OR = 8,
   61         NG_PATCH_MODE_XOR = 9,
   62         NG_PATCH_MODE_SHL = 10,
   63         NG_PATCH_MODE_SHR = 11
   64 };
   65 
   66 struct ng_patch_op {
   67         uint64_t        value;
   68         uint32_t        offset;
   69         uint16_t        length; /* 1,2,4 or 8 (bytes) */
   70         uint16_t        mode;
   71 };
   72 
   73 #define NG_PATCH_OP_TYPE_INFO   {       \
   74                 { "value",      &ng_parse_uint64_type   },      \
   75                 { "offset",     &ng_parse_uint32_type   },      \
   76                 { "length",     &ng_parse_uint16_type   },      \
   77                 { "mode",       &ng_parse_uint16_type   },      \
   78                 { NULL } \
   79 }
   80 
   81 struct ng_patch_config {
   82         uint32_t        count;
   83         uint32_t        csum_flags;
   84         struct ng_patch_op ops[];
   85 };
   86 
   87 #define NG_PATCH_CONFIG_TYPE_INFO       {       \
   88                 { "count",      &ng_parse_uint32_type   },      \
   89                 { "csum_flags", &ng_parse_uint32_type   },      \
   90                 { "ops",        &ng_patch_confarr_type  },      \
   91                 { NULL } \
   92 }
   93 
   94 struct ng_patch_stats {
   95         uint64_t        received;
   96         uint64_t        patched;
   97         uint64_t        dropped;
   98 };
   99 
  100 #define NG_PATCH_STATS_TYPE_INFO {      \
  101                 { "received",   &ng_parse_uint64_type   },      \
  102                 { "patched",    &ng_parse_uint64_type   },      \
  103                 { "dropped",    &ng_parse_uint64_type   },      \
  104                 { NULL } \
  105 }
  106 
  107 #endif /* _NETGRAPH_NG_PATCH_H_ */

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