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: releng/12.0/sys/netgraph/ng_tcpmss.h 326272 2017-11-27 15:23:17Z pfg $
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. */
42 struct 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. */
62 struct 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 */
77 enum {
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_ */
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