1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2010 Maxim Ignatenko <gelraen.ua@gmail.com>
5 * Copyright (c) 2015 Dmitry Vagin <daemon.hammer@ya.ru>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef _NETGRAPH_NG_PATCH_H_
31#define _NETGRAPH_NG_PATCH_H_
32
33/* Node type name. */
34#define NG_PATCH_NODE_TYPE "patch"
35
36/* Node type cookie. */
37#define NGM_PATCH_COOKIE 1262445509
38
39/* Hook names */
40#define NG_PATCH_HOOK_IN "in"
41#define NG_PATCH_HOOK_OUT "out"
42
43/* Checksum flags */
44#define NG_PATCH_CSUM_IPV4 (CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP)
45#define NG_PATCH_CSUM_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6|CSUM_SCTP_IPV6)
46
47/* Netgraph commands understood by this node type */
48enum {
49 NGM_PATCH_SETCONFIG = 1,
50 NGM_PATCH_GETCONFIG,
51 NGM_PATCH_GET_STATS,
52 NGM_PATCH_CLR_STATS,
53 NGM_PATCH_GETCLR_STATS,
54 NGM_PATCH_GETDLT,
55 NGM_PATCH_SETDLT
56};
57
58/* Patching modes */
59enum {
60 NG_PATCH_MODE_SET = 1,
61 NG_PATCH_MODE_ADD = 2,
62 NG_PATCH_MODE_SUB = 3,
63 NG_PATCH_MODE_MUL = 4,
64 NG_PATCH_MODE_DIV = 5,
65 NG_PATCH_MODE_NEG = 6,
66 NG_PATCH_MODE_AND = 7,
67 NG_PATCH_MODE_OR = 8,
68 NG_PATCH_MODE_XOR = 9,
69 NG_PATCH_MODE_SHL = 10,
70 NG_PATCH_MODE_SHR = 11
71};
72
73/* Parsing declarations */
74
75#define NG_PATCH_CONFIG_TYPE { \
76 { "count", &ng_parse_uint32_type }, \
77 { "csum_flags", &ng_parse_uint64_type }, \
78 { "relative_offset", &ng_parse_uint32_type }, \
79 { "ops", &ng_patch_ops_array_type }, \
80 { NULL } \
81}
82
83#define NG_PATCH_OP_TYPE { \
84 { "offset", &ng_parse_uint32_type }, \
85 { "length", &ng_parse_uint16_type }, \
86 { "mode", &ng_parse_uint16_type }, \
87 { "value", &ng_parse_uint64_type }, \
88 { NULL } \
89}
90
91#define NG_PATCH_STATS_TYPE { \
92 { "Received", &ng_parse_uint64_type }, \
93 { "Patched", &ng_parse_uint64_type }, \
94 { "Dropped", &ng_parse_uint64_type }, \
95 { NULL } \
96}
97
98union ng_patch_op_val {
99 uint8_t v1;
100 uint16_t v2;
101 uint32_t v4;
102 uint64_t v8;
103};
104
105struct ng_patch_op {
106 uint32_t offset;
107 uint16_t length; /* 1, 2, 4 or 8 (bytes) */
108 uint16_t mode;
109 union ng_patch_op_val val;
110};
111
112struct ng_patch_config {
113 uint32_t count;
114 uint64_t csum_flags;
115 uint32_t relative_offset;
116 struct ng_patch_op ops[];
117};
118
119struct ng_patch_stats {
120 uint64_t received;
121 uint64_t patched;
122 uint64_t dropped;
123};
124
125struct ng_patch_vlan_header {
126 u_int16_t tag;
127 u_int16_t etype;
128};
129
130#define NG_PATCH_CONF_SIZE(count) (sizeof(struct ng_patch_config) + \
131 (count) * sizeof(struct ng_patch_op))
132
133#endif /* _NETGRAPH_NG_PATCH_H_ */