| 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. */ |
| 40 | struct 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. */ |
| 59 | struct 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 */ |
| 74 | enum { |
| 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_ */ |