1/*-
2 * ng_tcpmss.h
3 *
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 *
6 * Copyright (c) 2004, Alexey Popov <lollypop@flexuser.ru>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice unmodified, this list of conditions, and the following
14 *    disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD$
32 */
33
34#ifndef _NETGRAPH_TCPMSS_H_
35#define _NETGRAPH_TCPMSS_H_
36
37/* Node type name and magic cookie */
38#define NG_TCPMSS_NODE_TYPE	"tcpmss"
39#define NGM_TCPMSS_COOKIE	1097623478
40
41/* Statistics structure for one hook. */
42struct ng_tcpmss_hookstat {
43	uint64_t	Octets;
44	uint64_t	Packets;
45	uint16_t	maxMSS;
46	uint64_t	SYNPkts;
47	uint64_t	FixedPkts;
48};
49
50/* Keep this in sync with the above structure definition. */
51#define NG_TCPMSS_HOOKSTAT_INFO	{			\
52	{ "Octets",	&ng_parse_uint64_type	},	\
53	{ "Packets",	&ng_parse_uint64_type	},	\
54	{ "maxMSS",	&ng_parse_uint16_type	},	\
55	{ "SYNPkts",	&ng_parse_uint64_type	},	\
56	{ "FixedPkts",	&ng_parse_uint64_type	},	\
57	{ NULL }					\
58}
59
60
61/* Structure for NGM_TCPMSS_CONFIG. */
62struct ng_tcpmss_config {
63	char		inHook[NG_HOOKSIZ];
64	char		outHook[NG_HOOKSIZ];
65	uint16_t	maxMSS;
66};
67
68/* Keep this in sync with the above structure definition. */
69#define NG_TCPMSS_CONFIG_INFO {				\
70	{ "inHook",	&ng_parse_hookbuf_type	},	\
71	{ "outHook",	&ng_parse_hookbuf_type	},	\
72	{ "maxMSS",	&ng_parse_uint16_type	},	\
73	{ NULL }					\
74}
75
76/* Netgraph commands */
77enum {
78	NGM_TCPMSS_GET_STATS = 1,	/* Get stats. */
79	NGM_TCPMSS_CLR_STATS,		/* Clear stats. */
80	NGM_TCPMSS_GETCLR_STATS,	/* "Atomically" get and clear stats. */
81	NGM_TCPMSS_CONFIG		/* Set configuration. */
82};
83
84#endif /* _NETGRAPH_TCPMSS_H_ */
85