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_tcpmss.h

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    1 /*-
    2  * ng_tcpmss.h
    3  *
    4  * Copyright (c) 2004, Alexey Popov <lollypop@flexuser.ru>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: releng/11.0/sys/netgraph/ng_tcpmss.h 147231 2005-06-10 08:02:34Z glebius $
   30  */
   31 
   32 #ifndef _NETGRAPH_TCPMSS_H_
   33 #define _NETGRAPH_TCPMSS_H_
   34 
   35 /* Node type name and magic cookie */
   36 #define NG_TCPMSS_NODE_TYPE     "tcpmss"
   37 #define NGM_TCPMSS_COOKIE       1097623478
   38 
   39 /* Statistics structure for one hook. */
   40 struct ng_tcpmss_hookstat {
   41         uint64_t        Octets;
   42         uint64_t        Packets;
   43         uint16_t        maxMSS;
   44         uint64_t        SYNPkts;
   45         uint64_t        FixedPkts;
   46 };
   47 
   48 /* Keep this in sync with the above structure definition. */
   49 #define NG_TCPMSS_HOOKSTAT_INFO {                       \
   50         { "Octets",     &ng_parse_uint64_type   },      \
   51         { "Packets",    &ng_parse_uint64_type   },      \
   52         { "maxMSS",     &ng_parse_uint16_type   },      \
   53         { "SYNPkts",    &ng_parse_uint64_type   },      \
   54         { "FixedPkts",  &ng_parse_uint64_type   },      \
   55         { NULL }                                        \
   56 }
   57 
   58 
   59 /* Structure for NGM_TCPMSS_CONFIG. */
   60 struct ng_tcpmss_config {
   61         char            inHook[NG_HOOKSIZ];
   62         char            outHook[NG_HOOKSIZ];
   63         uint16_t        maxMSS;
   64 };
   65 
   66 /* Keep this in sync with the above structure definition. */
   67 #define NG_TCPMSS_CONFIG_INFO {                         \
   68         { "inHook",     &ng_parse_hookbuf_type  },      \
   69         { "outHook",    &ng_parse_hookbuf_type  },      \
   70         { "maxMSS",     &ng_parse_uint16_type   },      \
   71         { NULL }                                        \
   72 }
   73 
   74 /* Netgraph commands */
   75 enum {
   76         NGM_TCPMSS_GET_STATS = 1,       /* Get stats. */
   77         NGM_TCPMSS_CLR_STATS,           /* Clear stats. */
   78         NGM_TCPMSS_GETCLR_STATS,        /* "Atomically" get and clear stats. */
   79         NGM_TCPMSS_CONFIG               /* Set configuration. */
   80 };
   81 
   82 #endif /* _NETGRAPH_TCPMSS_H_ */

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