/*-
 * 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_CHECKSUM_H_
#define _NETGRAPH_NG_CHECKSUM_H_

/* Node type name. */
#define NG_CHECKSUM_NODE_TYPE   "checksum"

/* Node type cookie. */
#define NGM_CHECKSUM_COOKIE     439419912

/* Hook names */
#define NG_CHECKSUM_HOOK_IN     "in"
#define NG_CHECKSUM_HOOK_OUT    "out"

/* Checksum flags */
#define NG_CHECKSUM_CSUM_IPV4   (CSUM_IP|CSUM_TCP|CSUM_UDP)
#define NG_CHECKSUM_CSUM_IPV6   (CSUM_TCP_IPV6|CSUM_UDP_IPV6)

/* Netgraph commands understood by this node type */
enum {
        NGM_CHECKSUM_GETDLT = 1,
        NGM_CHECKSUM_SETDLT,
        NGM_CHECKSUM_GETCONFIG,
        NGM_CHECKSUM_SETCONFIG,
        NGM_CHECKSUM_GETCLR_STATS,
        NGM_CHECKSUM_GET_STATS,
        NGM_CHECKSUM_CLR_STATS,
};

/* Parsing declarations */

#define NG_CHECKSUM_CONFIG_TYPE {                               \
        { "csum_flags",         &ng_parse_uint64_type   },      \
        { "csum_offload",       &ng_parse_uint64_type   },      \
        { NULL }                                                \
}

#define NG_CHECKSUM_STATS_TYPE {                                \
        { "Received",           &ng_parse_uint64_type   },      \
        { "Processed",          &ng_parse_uint64_type   },      \
        { "Dropped",            &ng_parse_uint64_type   },      \
        { NULL }                                        \
}

struct ng_checksum_config {
        uint64_t        csum_flags;
        uint64_t        csum_offload;
};

struct ng_checksum_stats {
        uint64_t        received;
        uint64_t        processed;
        uint64_t        dropped;
};

struct ng_checksum_vlan_header {
        u_int16_t tag;
        u_int16_t etype;
};

#endif /* _NETGRAPH_NG_CHECKSUM_H_ */