/*      $NetBSD: ieee8023ad_lacp_sm_tx.c,v 1.5 2021/11/30 01:17:02 yamaguchi 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ieee8023ad_lacp_sm_tx.c,v 1.5 2021/11/30 01:17:02 yamaguchi Exp $");

#include <sys/param.h>
#include <sys/callout.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
#include <sys/kernel.h> /* getticks() */

#include <net/if.h>
#include <net/if_ether.h>
#include <net/ether_slowprotocols.h>

#include <net/agr/ieee8023_tlv.h>
#include <net/agr/ieee8023ad_lacp.h>
#include <net/agr/ieee8023ad_lacp_impl.h>
#include <net/agr/ieee8023ad_lacp_sm.h>
#include <net/agr/ieee8023ad_lacp_debug.h>

/* transmit machine */

void
lacp_sm_tx(struct lacp_port *lp)
{
       int error;
       int now;

       if (!(lp->lp_state & LACP_STATE_AGGREGATION)
#if 1
           || (!(lp->lp_state & LACP_STATE_ACTIVITY)
           && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
#endif
           ) {
               lp->lp_flags &= ~LACPPORT_NTT;
       }

       if (!(lp->lp_flags & LACPPORT_NTT)) {
               return;
       }

       /* rate limit */
       now = getticks();
       if ((unsigned int)(now - lp->lp_last_lacpdu_sent) <=
           LACP_FAST_PERIODIC_TIME * hz / 3) {
               return;
       }
       lp->lp_last_lacpdu_sent = now;

       error = lacp_xmit_lacpdu(lp);

       if (error == 0) {
               lp->lp_flags &= ~LACPPORT_NTT;
       } else {
               LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
                   error));
       }
}

void
lacp_sm_assert_ntt(struct lacp_port *lp)
{

       lp->lp_flags |= LACPPORT_NTT;
}