1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 * $FreeBSD$
30 */
31
32 #ifndef _NETGRAPH_NG_PATCH_H_
33 #define _NETGRAPH_NG_PATCH_H_
34
35 /* Node type name. */
36 #define NG_PATCH_NODE_TYPE "patch"
37
38 /* Node type cookie. */
39 #define NGM_PATCH_COOKIE 1262445509
40
41 /* Hook names */
42 #define NG_PATCH_HOOK_IN "in"
43 #define NG_PATCH_HOOK_OUT "out"
44
45 /* Checksum flags */
46 #define NG_PATCH_CSUM_IPV4 (CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP)
47 #define NG_PATCH_CSUM_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6|CSUM_SCTP_IPV6)
48
49 /* Netgraph commands understood by this node type */
50 enum {
51 NGM_PATCH_SETCONFIG = 1,
52 NGM_PATCH_GETCONFIG,
53 NGM_PATCH_GET_STATS,
54 NGM_PATCH_CLR_STATS,
55 NGM_PATCH_GETCLR_STATS,
56 NGM_PATCH_GETDLT,
57 NGM_PATCH_SETDLT
58 };
59
60 /* Patching modes */
61 enum {
62 NG_PATCH_MODE_SET = 1,
63 NG_PATCH_MODE_ADD = 2,
64 NG_PATCH_MODE_SUB = 3,
65 NG_PATCH_MODE_MUL = 4,
66 NG_PATCH_MODE_DIV = 5,
67 NG_PATCH_MODE_NEG = 6,
68 NG_PATCH_MODE_AND = 7,
69 NG_PATCH_MODE_OR = 8,
70 NG_PATCH_MODE_XOR = 9,
71 NG_PATCH_MODE_SHL = 10,
72 NG_PATCH_MODE_SHR = 11
73 };
74
75 /* Parsing declarations */
76
77 #define NG_PATCH_CONFIG_TYPE { \
78 { "count", &ng_parse_uint32_type }, \
79 { "csum_flags", &ng_parse_uint64_type }, \
80 { "relative_offset", &ng_parse_uint32_type }, \
81 { "ops", &ng_patch_ops_array_type }, \
82 { NULL } \
83 }
84
85 #define NG_PATCH_OP_TYPE { \
86 { "offset", &ng_parse_uint32_type }, \
87 { "length", &ng_parse_uint16_type }, \
88 { "mode", &ng_parse_uint16_type }, \
89 { "value", &ng_parse_uint64_type }, \
90 { NULL } \
91 }
92
93 #define NG_PATCH_STATS_TYPE { \
94 { "Received", &ng_parse_uint64_type }, \
95 { "Patched", &ng_parse_uint64_type }, \
96 { "Dropped", &ng_parse_uint64_type }, \
97 { NULL } \
98 }
99
100 union ng_patch_op_val {
101 uint8_t v1;
102 uint16_t v2;
103 uint32_t v4;
104 uint64_t v8;
105 };
106
107 struct ng_patch_op {
108 uint32_t offset;
109 uint16_t length; /* 1, 2, 4 or 8 (bytes) */
110 uint16_t mode;
111 union ng_patch_op_val val;
112 };
113
114 struct ng_patch_config {
115 uint32_t count;
116 uint64_t csum_flags;
117 uint32_t relative_offset;
118 struct ng_patch_op ops[];
119 };
120
121 struct ng_patch_stats {
122 uint64_t received;
123 uint64_t patched;
124 uint64_t dropped;
125 };
126
127 struct ng_patch_vlan_header {
128 u_int16_t tag;
129 u_int16_t etype;
130 };
131
132 #define NG_PATCH_CONF_SIZE(count) (sizeof(struct ng_patch_config) + \
133 (count) * sizeof(struct ng_patch_op))
134
135 #endif /* _NETGRAPH_NG_PATCH_H_ */
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