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_tag.h

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    1 /*-
    2  * Copyright (c) 2006 Vadim Goncharov <vadimnuclight@tpu.ru>
    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 unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD: releng/11.1/sys/netgraph/ng_tag.h 159979 2006-06-27 12:45:28Z glebius $
   28  */
   29 
   30 #ifndef _NETGRAPH_NG_TAG_H_
   31 #define _NETGRAPH_NG_TAG_H_
   32 
   33 /* Node type name and magic cookie. */
   34 #define NG_TAG_NODE_TYPE        "tag"
   35 #define NGM_TAG_COOKIE          1149771193
   36 
   37 /*
   38  * The types of tag_cookie, tag_len and tag_id in structures below
   39  * must be the same as corresponding members m_tag_cookie, m_tag_len
   40  * and m_tag_id in struct m_tag (defined in <sys/mbuf.h>).
   41  */
   42 
   43 /* Tag match structure for every (input) hook. */
   44 struct ng_tag_hookin {
   45         char            thisHook[NG_HOOKSIZ];           /* name of hook */
   46         char            ifMatch[NG_HOOKSIZ];            /* match dest hook */
   47         char            ifNotMatch[NG_HOOKSIZ];         /* !match dest hook */
   48         uint8_t         strip;                          /* strip tag if found */
   49         uint32_t        tag_cookie;                     /* ABI/Module ID */
   50         uint16_t        tag_id;                         /* tag ID */
   51         uint16_t        tag_len;                        /* length of data */
   52         uint8_t         tag_data[0];                    /* tag data */
   53 };
   54 
   55 /* Tag set structure for every (output) hook. */
   56 struct ng_tag_hookout {
   57         char            thisHook[NG_HOOKSIZ];           /* name of hook */
   58         uint32_t        tag_cookie;                     /* ABI/Module ID */
   59         uint16_t        tag_id;                         /* tag ID */
   60         uint16_t        tag_len;                        /* length of data */
   61         uint8_t         tag_data[0];                    /* tag data */
   62 };
   63 
   64 #define NG_TAG_HOOKIN_SIZE(taglen)      \
   65         (sizeof(struct ng_tag_hookin) + (taglen))
   66 
   67 #define NG_TAG_HOOKOUT_SIZE(taglen)     \
   68         (sizeof(struct ng_tag_hookout) + (taglen))
   69 
   70 /* Keep this in sync with the above structures definitions. */
   71 #define NG_TAG_HOOKIN_TYPE_INFO(tdtype) {               \
   72           { "thisHook",         &ng_parse_hookbuf_type  },      \
   73           { "ifMatch",          &ng_parse_hookbuf_type  },      \
   74           { "ifNotMatch",       &ng_parse_hookbuf_type  },      \
   75           { "strip",            &ng_parse_uint8_type    },      \
   76           { "tag_cookie",       &ng_parse_uint32_type   },      \
   77           { "tag_id",           &ng_parse_uint16_type   },      \
   78           { "tag_len",          &ng_parse_uint16_type   },      \
   79           { "tag_data",         (tdtype)                },      \
   80           { NULL }                                              \
   81 }
   82 
   83 #define NG_TAG_HOOKOUT_TYPE_INFO(tdtype)        {               \
   84           { "thisHook",         &ng_parse_hookbuf_type  },      \
   85           { "tag_cookie",       &ng_parse_uint32_type   },      \
   86           { "tag_id",           &ng_parse_uint16_type   },      \
   87           { "tag_len",          &ng_parse_uint16_type   },      \
   88           { "tag_data",         (tdtype)                },      \
   89           { NULL }                                              \
   90 }
   91 
   92 #ifdef NG_TAG_DEBUG
   93 
   94 /* Statistics structure for one hook. */
   95 struct ng_tag_hookstat {
   96         uint64_t        recvFrames;
   97         uint64_t        recvOctets;
   98         uint64_t        recvMatchFrames;
   99         uint64_t        recvMatchOctets;
  100         uint64_t        xmitFrames;
  101         uint64_t        xmitOctets;
  102 };
  103 
  104 /* Keep this in sync with the above structure definition. */
  105 #define NG_TAG_HOOKSTAT_TYPE_INFO       {                       \
  106           { "recvFrames",       &ng_parse_uint64_type   },      \
  107           { "recvOctets",       &ng_parse_uint64_type   },      \
  108           { "recvMatchFrames",  &ng_parse_uint64_type   },      \
  109           { "recvMatchOctets",  &ng_parse_uint64_type   },      \
  110           { "xmitFrames",       &ng_parse_uint64_type   },      \
  111           { "xmitOctets",       &ng_parse_uint64_type   },      \
  112           { NULL }                                              \
  113 }
  114 
  115 #endif /* NG_TAG_DEBUG */
  116 
  117 /* Netgraph commands. */
  118 enum {
  119         NGM_TAG_SET_HOOKIN = 1,         /* supply a struct ng_tag_hookin */
  120         NGM_TAG_GET_HOOKIN,             /* returns a struct ng_tag_hookin */
  121         NGM_TAG_SET_HOOKOUT,            /* supply a struct ng_tag_hookout */
  122         NGM_TAG_GET_HOOKOUT,            /* returns a struct ng_tag_hookout */
  123 #ifdef NG_TAG_DEBUG
  124         NGM_TAG_GET_STATS,              /* supply name as char[NG_HOOKSIZ] */
  125         NGM_TAG_CLR_STATS,              /* supply name as char[NG_HOOKSIZ] */
  126         NGM_TAG_GETCLR_STATS,           /* supply name as char[NG_HOOKSIZ] */
  127 #endif
  128 };
  129 
  130 #endif /* _NETGRAPH_NG_TAG_H_ */

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