1/*-
 2 * ng_tcpmss.h
 3 *
 4 * SPDX-License-Identifier: BSD-2-Clause
 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
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. */
40struct 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/* Structure for NGM_TCPMSS_CONFIG. */
59struct ng_tcpmss_config {
60	char		inHook[NG_HOOKSIZ];
61	char		outHook[NG_HOOKSIZ];
62	uint16_t	maxMSS;
63};
64
65/* Keep this in sync with the above structure definition. */
66#define NG_TCPMSS_CONFIG_INFO {				\
67	{ "inHook",	&ng_parse_hookbuf_type	},	\
68	{ "outHook",	&ng_parse_hookbuf_type	},	\
69	{ "maxMSS",	&ng_parse_uint16_type	},	\
70	{ NULL }					\
71}
72
73/* Netgraph commands */
74enum {
75	NGM_TCPMSS_GET_STATS = 1,	/* Get stats. */
76	NGM_TCPMSS_CLR_STATS,		/* Clear stats. */
77	NGM_TCPMSS_GETCLR_STATS,	/* "Atomically" get and clear stats. */
78	NGM_TCPMSS_CONFIG		/* Set configuration. */
79};
80
81#endif /* _NETGRAPH_TCPMSS_H_ */