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