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. */ 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_ */ 85