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ieee8023ad_lacp_sm_ptx.c revision 1.1 
      1 /*	$NetBSD: ieee8023ad_lacp_sm_ptx.c,v 1.1 2005/03/18 11:11:50 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2005 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: ieee8023ad_lacp_sm_ptx.c,v 1.1 2005/03/18 11:11:50 yamt Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/mbuf.h>
     34 #include <sys/systm.h>
     35 
     36 #include <net/if.h>
     37 #include <net/if_ether.h>
     38 
     39 #include <net/agr/ieee8023_slowprotocols.h>
     40 #include <net/agr/ieee8023_tlv.h>
     41 #include <net/agr/ieee8023ad_lacp.h>
     42 #include <net/agr/ieee8023ad_lacp_impl.h>
     43 #include <net/agr/ieee8023ad_lacp_sm.h>
     44 #include <net/agr/ieee8023ad_lacp_debug.h>
     45 
     46 /* periodic transmit machine */
     47 
     48 void
     49 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
     50 {
     51 
     52 	if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
     53 	    LACP_STATE_TIMEOUT)) {
     54 		return;
     55 	}
     56 
     57 	LACP_DPRINTF((lp, "partner timeout changed\n"));
     58 
     59 	/*
     60 	 * FAST_PERIODIC -> SLOW_PERIODIC
     61 	 * or
     62 	 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
     63 	 *
     64 	 * let lacp_sm_ptx_tx_schedule to update timeout.
     65 	 */
     66 
     67 	LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
     68 
     69 	/*
     70 	 * if timeout has been shortened, assert NTT.
     71 	 */
     72 
     73 	if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
     74 		lacp_sm_assert_ntt(lp);
     75 	}
     76 }
     77 
     78 void
     79 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
     80 {
     81 	int timeout;
     82 
     83 	if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
     84 	    !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
     85 
     86 		/*
     87 		 * NO_PERIODIC
     88 		 */
     89 
     90 		LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
     91 		return;
     92 	}
     93 
     94 	if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
     95 		return;
     96 	}
     97 
     98 	timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
     99 	    LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
    100 
    101 	LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
    102 }
    103 
    104 void
    105 lacp_sm_ptx_timer(struct lacp_port *lp)
    106 {
    107 
    108 	lacp_sm_assert_ntt(lp);
    109 }
    110