sys/netgraph7/ng_tcpmss.h

   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: src/sys/netgraph/ng_tcpmss.h,v 1.1 2005/06/10 08:02:34 glebius Exp $
  30  * $DragonFly: src/sys/netgraph7/ng_tcpmss.h,v 1.2 2008/06/26 23:05:35 dillon Exp $
  31  */
  32
  33 #ifndef _NETGRAPH_TCPMSS_H_
  34 #define _NETGRAPH_TCPMSS_H_
  35
  36 /* Node type name and magic cookie */
  37 #define NG_TCPMSS_NODE_TYPE     "tcpmss"
  38 #define NGM_TCPMSS_COOKIE       1097623478
  39
  40 /* Statistics structure for one hook. */
  41 struct ng_tcpmss_hookstat {
  42         uint64_t        Octets;
  43         uint64_t        Packets;
  44         uint16_t        maxMSS;
  45         uint64_t        SYNPkts;
  46         uint64_t        FixedPkts;
  47 };
  48
  49 /* Keep this in sync with the above structure definition. */
  50 #define NG_TCPMSS_HOOKSTAT_INFO {                       \
  51         { "Octets",     &ng_parse_uint64_type   },      \
  52         { "Packets",    &ng_parse_uint64_type   },      \
  53         { "maxMSS",     &ng_parse_uint16_type   },      \
  54         { "SYNPkts",    &ng_parse_uint64_type   },      \
  55         { "FixedPkts",  &ng_parse_uint64_type   },      \
  56         { NULL }                                        \
  57 }
  58
  59
  60 /* Structure for NGM_TCPMSS_CONFIG. */
  61 struct ng_tcpmss_config {
  62         char            inHook[NG_HOOKSIZ];
  63         char            outHook[NG_HOOKSIZ];
  64         uint16_t        maxMSS;
  65 };
  66
  67 /* Keep this in sync with the above structure definition. */
  68 #define NG_TCPMSS_CONFIG_INFO {                         \
  69         { "inHook",     &ng_parse_hookbuf_type  },      \
  70         { "outHook",    &ng_parse_hookbuf_type  },      \
  71         { "maxMSS",     &ng_parse_uint16_type   },      \
  72         { NULL }                                        \
  73 }
  74
  75 /* Netgraph commands */
  76 enum {
  77         NGM_TCPMSS_GET_STATS = 1,       /* Get stats. */
  78         NGM_TCPMSS_CLR_STATS,           /* Clear stats. */
  79         NGM_TCPMSS_GETCLR_STATS,        /* "Atomically" get and clear stats. */
  80         NGM_TCPMSS_CONFIG               /* Set configuration. */
  81 };
  82
  83 #endif /* _NETGRAPH_TCPMSS_H_ */