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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  * $FreeBSD$
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_ */