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134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2010 Maxim Ignatenko <gelraen.ua@gmail.com>
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* Copyright (c) 2015 Dmitry Vagin <daemon.hammer@ya.ru>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _NETGRAPH_NG_PATCH_H_
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#define _NETGRAPH_NG_PATCH_H_
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/* Node type name. */
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#define NG_PATCH_NODE_TYPE "patch"
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/* Node type cookie. */
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#define NGM_PATCH_COOKIE 1262445509
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/* Hook names */
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#define NG_PATCH_HOOK_IN "in"
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#define NG_PATCH_HOOK_OUT "out"
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/* Checksum flags */
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#define NG_PATCH_CSUM_IPV4 (CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP)
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#define NG_PATCH_CSUM_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6|CSUM_SCTP_IPV6)
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/* Netgraph commands understood by this node type */
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enum {
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NGM_PATCH_SETCONFIG = 1,
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NGM_PATCH_GETCONFIG,
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NGM_PATCH_GET_STATS,
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NGM_PATCH_CLR_STATS,
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NGM_PATCH_GETCLR_STATS,
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NGM_PATCH_GETDLT,
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NGM_PATCH_SETDLT
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};
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/* Patching modes */
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enum {
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NG_PATCH_MODE_SET = 1,
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NG_PATCH_MODE_ADD = 2,
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NG_PATCH_MODE_SUB = 3,
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NG_PATCH_MODE_MUL = 4,
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NG_PATCH_MODE_DIV = 5,
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NG_PATCH_MODE_NEG = 6,
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NG_PATCH_MODE_AND = 7,
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NG_PATCH_MODE_OR = 8,
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NG_PATCH_MODE_XOR = 9,
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NG_PATCH_MODE_SHL = 10,
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NG_PATCH_MODE_SHR = 11
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};
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/* Parsing declarations */
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#define NG_PATCH_CONFIG_TYPE { \
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{ "count", &ng_parse_uint32_type }, \
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{ "csum_flags", &ng_parse_uint64_type }, \
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{ "relative_offset", &ng_parse_uint32_type }, \
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{ "ops", &ng_patch_ops_array_type }, \
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{ NULL } \
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}
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#define NG_PATCH_OP_TYPE { \
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{ "offset", &ng_parse_uint32_type }, \
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{ "length", &ng_parse_uint16_type }, \
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{ "mode", &ng_parse_uint16_type }, \
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{ "value", &ng_parse_uint64_type }, \
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{ NULL } \
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}
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#define NG_PATCH_STATS_TYPE { \
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{ "Received", &ng_parse_uint64_type }, \
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{ "Patched", &ng_parse_uint64_type }, \
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{ "Dropped", &ng_parse_uint64_type }, \
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{ NULL } \
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}
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union ng_patch_op_val {
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uint8_t v1;
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uint16_t v2;
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uint32_t v4;
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uint64_t v8;
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};
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struct ng_patch_op {
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uint32_t offset;
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uint16_t length; /* 1, 2, 4 or 8 (bytes) */
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uint16_t mode;
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union ng_patch_op_val val;
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};
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struct ng_patch_config {
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uint32_t count;
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uint64_t csum_flags;
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uint32_t relative_offset;
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struct ng_patch_op ops[];
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};
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struct ng_patch_stats {
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uint64_t received;
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uint64_t patched;
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uint64_t dropped;
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};
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struct ng_patch_vlan_header {
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u_int16_t tag;
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u_int16_t etype;
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};
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#define NG_PATCH_CONF_SIZE(count) (sizeof(struct ng_patch_config) + \
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(count) * sizeof(struct ng_patch_op))
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#endif /* _NETGRAPH_NG_PATCH_H_ */
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