4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c) 2004, Alexey Popov <lollypop@flexuser.ru>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
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.
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
32 #ifndef _NETGRAPH_TCPMSS_H_
33 #define _NETGRAPH_TCPMSS_H_
35 /* Node type name and magic cookie */
36 #define NG_TCPMSS_NODE_TYPE "tcpmss"
37 #define NGM_TCPMSS_COOKIE 1097623478
39 /* Statistics structure for one hook. */
40 struct ng_tcpmss_hookstat {
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 }, \
58 /* Structure for NGM_TCPMSS_CONFIG. */
59 struct ng_tcpmss_config {
60 char inHook[NG_HOOKSIZ];
61 char outHook[NG_HOOKSIZ];
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 }, \
73 /* Netgraph commands */
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. */
81 #endif /* _NETGRAPH_TCPMSS_H_ */