/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2004-2008 University of Zagreb
 * Copyright (c) 2007-2008 FreeBSD Foundation
 *
 * This software was developed by the University of Zagreb and the
 * FreeBSD Foundation under sponsorship by the Stichting NLnet and the
 * FreeBSD Foundation.
 *
 * 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_PIPE_H_
#define _NETGRAPH_PIPE_H_

/* Node type name and magic cookie */
#define NG_PIPE_NODE_TYPE       "pipe"
#define NGM_PIPE_COOKIE         200708191

/* Hook names */
#define NG_PIPE_HOOK_UPPER      "upper"
#define NG_PIPE_HOOK_LOWER      "lower"

#define MAX_FSIZE 65536 /* Largest supported frame size, in bytes, for BER */
#define MAX_OHSIZE 256  /* Largest supported dummy-framing size, in bytes */

/* Statistics structure for one hook */
struct ng_pipe_hookstat {
        u_int64_t               fwd_octets;
        u_int64_t               fwd_frames;
        u_int64_t               in_disc_octets;
        u_int64_t               in_disc_frames;
        u_int64_t               out_disc_octets;
        u_int64_t               out_disc_frames;
};

/* Keep this in sync with the above structure definition */
#define NG_PIPE_HOOKSTAT_INFO   {                                       \
        { "FwdOctets",          &ng_parse_uint64_type   },              \
        { "FwdFrames",          &ng_parse_uint64_type   },              \
        { "queueDropOctets",    &ng_parse_uint64_type   },              \
        { "queueDropFrames",    &ng_parse_uint64_type   },              \
        { "delayDropOctets",    &ng_parse_uint64_type   },              \
        { "delayDropFrames",    &ng_parse_uint64_type   },              \
        { NULL },                                                       \
}

/* Statistics structure returned by NGM_PIPE_GET_STATS */
struct ng_pipe_stats {
        struct ng_pipe_hookstat downstream;
        struct ng_pipe_hookstat upstream;
};

/* Keep this in sync with the above structure definition */
#define NG_PIPE_STATS_INFO(hstype)      {                               \
        { "downstream",         (hstype) },                             \
        { "upstream",           (hstype) },                             \
        { NULL },                                                       \
}

/* Runtime structure for one hook */
struct ng_pipe_hookrun {
        u_int32_t               fifo_queues;
        u_int32_t               qin_octets;
        u_int32_t               qin_frames;
        u_int32_t               qout_octets;
        u_int32_t               qout_frames;
};

/* Keep this in sync with the above structure definition */
#define NG_PIPE_HOOKRUN_INFO    {                                       \
        { "queues",             &ng_parse_uint32_type   },              \
        { "queuedOctets",       &ng_parse_uint32_type   },              \
        { "queuedFrames",       &ng_parse_uint32_type   },              \
        { "delayedOctets",      &ng_parse_uint32_type   },              \
        { "delayedFrames",      &ng_parse_uint32_type   },              \
        { NULL },                                                       \
}

/* Runtime structure returned by NGM_PIPE_GET_RUN */
struct ng_pipe_run {
        struct ng_pipe_hookrun  downstream;
        struct ng_pipe_hookrun  upstream;
};

/* Keep this in sync with the above structure definition */
#define NG_PIPE_RUN_INFO(hstype)        {                               \
        { "downstream",         (hstype) },                             \
        { "upstream",           (hstype) },                             \
        { NULL },                                                       \
}

/* Config structure for one hook */
struct ng_pipe_hookcfg {
        u_int64_t               bandwidth;
        u_int64_t               ber;
        u_int32_t               qin_size_limit;
        u_int32_t               qout_size_limit;
        u_int32_t               duplicate;
        u_int32_t               fifo;
        u_int32_t               drr;
        u_int32_t               wfq;
        u_int32_t               droptail;
        u_int32_t               drophead;
};

/* Keep this in sync with the above structure definition */
#define NG_PIPE_HOOKCFG_INFO    {                                       \
        { "bandwidth",          &ng_parse_uint64_type   },              \
        { "BER",                &ng_parse_uint64_type   },              \
        { "queuelen",           &ng_parse_uint32_type   },              \
        { "delaylen",           &ng_parse_uint32_type   },              \
        { "duplicate",          &ng_parse_uint32_type   },              \
        { "fifo",               &ng_parse_uint32_type   },              \
        { "drr",                &ng_parse_uint32_type   },              \
        { "wfq",                &ng_parse_uint32_type   },              \
        { "droptail",           &ng_parse_uint32_type   },              \
        { "drophead",           &ng_parse_uint32_type   },              \
        { NULL },                                                       \
}

/* Config structure returned by NGM_PIPE_GET_CFG */
struct ng_pipe_cfg {
        u_int64_t               bandwidth;
        u_int64_t               delay;
        u_int32_t               header_offset;
        u_int32_t               overhead;
        struct ng_pipe_hookcfg  downstream;
        struct ng_pipe_hookcfg  upstream;
};

/* Keep this in sync with the above structure definition */
#define NG_PIPE_CFG_INFO(hstype)        {                               \
        { "bandwidth",          &ng_parse_uint64_type   },              \
        { "delay",              &ng_parse_uint64_type   },              \
        { "header_offset",      &ng_parse_uint32_type   },              \
        { "overhead",           &ng_parse_uint32_type   },              \
        { "downstream",         (hstype)                },              \
        { "upstream",           (hstype)                },              \
        { NULL },                                                       \
}

/* Netgraph commands */
enum {
        NGM_PIPE_GET_STATS=1,           /* get stats */
        NGM_PIPE_CLR_STATS,             /* clear stats */
        NGM_PIPE_GETCLR_STATS,          /* atomically get and clear stats */
        NGM_PIPE_GET_RUN,               /* get current runtime status */
        NGM_PIPE_GET_CFG,               /* get configurable parameters */
        NGM_PIPE_SET_CFG,               /* set configurable parameters */
};

#endif /* _NETGRAPH_PIPE_H_ */