1 /* $NetBSD: ieee8023ad_lacp_sm_tx.c,v 1.5 2021/11/30 01:17:02 yamaguchi 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_tx.c,v 1.5 2021/11/30 01:17:02 yamaguchi Exp $");
31
32 #include <sys/param.h>
33 #include <sys/callout.h>
34 #include <sys/mbuf.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h> /* getticks() */
37
38 #include <net/if.h>
39 #include <net/if_ether.h>
40 #include <net/ether_slowprotocols.h>
41
42 #include <net/agr/ieee8023_tlv.h>
43 #include <net/agr/ieee8023ad_lacp.h>
44 #include <net/agr/ieee8023ad_lacp_impl.h>
45 #include <net/agr/ieee8023ad_lacp_sm.h>
46 #include <net/agr/ieee8023ad_lacp_debug.h>
47
48 /* transmit machine */
49
50 void
lacp_sm_tx(struct lacp_port * lp)51 lacp_sm_tx(struct lacp_port *lp)
52 {
53 int error;
54 int now;
55
56 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
57 #if 1
58 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
59 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
60 #endif
61 ) {
62 lp->lp_flags &= ~LACPPORT_NTT;
63 }
64
65 if (!(lp->lp_flags & LACPPORT_NTT)) {
66 return;
67 }
68
69 /* rate limit */
70 now = getticks();
71 if ((unsigned int)(now - lp->lp_last_lacpdu_sent) <=
72 LACP_FAST_PERIODIC_TIME * hz / 3) {
73 return;
74 }
75 lp->lp_last_lacpdu_sent = now;
76
77 error = lacp_xmit_lacpdu(lp);
78
79 if (error == 0) {
80 lp->lp_flags &= ~LACPPORT_NTT;
81 } else {
82 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
83 error));
84 }
85 }
86
87 void
lacp_sm_assert_ntt(struct lacp_port * lp)88 lacp_sm_assert_ntt(struct lacp_port *lp)
89 {
90
91 lp->lp_flags |= LACPPORT_NTT;
92 }
93