/*      $NetBSD: ieee8023ad_lacp.h,v 1.3 2008/12/16 22:35:38 christos Exp $     */

/*-
 * Copyright (c)2005 YAMAMOTO Takashi,
 * 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 _NET_AGR_IEEE8023AD_LACP_H_
#define _NET_AGR_IEEE8023AD_LACP_H_

/*
 * IEEE802.3ad LACP
 *
 * protocol definitions.
 */

struct lacp_systemid {
        uint16_t lsi_prio;
        uint8_t lsi_mac[6];
} __packed;

struct lacp_portid {
        uint16_t lpi_prio;
        uint16_t lpi_portno;
} __packed;

struct lacp_peerinfo {
        struct lacp_systemid lip_systemid;
        uint16_t lip_key;
        struct lacp_portid lip_portid;
        uint8_t lip_state;
        uint8_t lip_resv[3];
} __packed;

#define LACP_STATE_ACTIVITY     (1<<0)
#define LACP_STATE_TIMEOUT      (1<<1)
#define LACP_STATE_AGGREGATION  (1<<2)
#define LACP_STATE_SYNC         (1<<3)
#define LACP_STATE_COLLECTING   (1<<4)
#define LACP_STATE_DISTRIBUTING (1<<5)
#define LACP_STATE_DEFAULTED    (1<<6)
#define LACP_STATE_EXPIRED      (1<<7)

/* for snprintb(3) */
#define LACP_STATE_BITS         \
        "\177\020"              \
        "b\0ACTIVITY\0"         \
        "b\1TIMEOUT\0"          \
        "b\2AGGREGATION\0"      \
        "b\3SYNC\0"             \
        "b\4COLLECTING\0"       \
        "b\5DISTRIBUTING\0"     \
        "b\6DEFAULTED\0"                \
        "b\7EXPIRED\0"

struct lacp_collectorinfo {
        uint16_t lci_maxdelay;
        uint8_t lci_resv[12];
} __packed;

struct lacpdu {
        struct ether_header ldu_eh;
        struct slowprothdr ldu_sph;

        struct tlvhdr ldu_tlv_actor;
        struct lacp_peerinfo ldu_actor;
        struct tlvhdr ldu_tlv_partner;
        struct lacp_peerinfo ldu_partner;
        struct tlvhdr ldu_tlv_collector;
        struct lacp_collectorinfo ldu_collector;
        struct tlvhdr ldu_tlv_term;
        uint8_t ldu_resv[50];
} __packed;

#define LACP_TYPE_ACTORINFO     1
#define LACP_TYPE_PARTNERINFO   2
#define LACP_TYPE_COLLECTORINFO 3

/* timeout values (in sec) */
#define LACP_FAST_PERIODIC_TIME         (1)
#define LACP_SLOW_PERIODIC_TIME         (30)
#define LACP_SHORT_TIMEOUT_TIME         (3 * LACP_FAST_PERIODIC_TIME)
#define LACP_LONG_TIMEOUT_TIME          (3 * LACP_SLOW_PERIODIC_TIME)
#define LACP_CHURN_DETECTION_TIME       (60)
#define LACP_AGGREGATE_WAIT_TIME        (2)

#endif /* !_NET_AGR_IEEE8023AD_LACP_H_ */