bfdd/event.c

   1 /*********************************************************************
   2  * Copyright 2017-2018 Network Device Education Foundation, Inc. ("NetDEF")
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the Free
   6  * Software Foundation; either version 2 of the License, or (at your option)
   7  * any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; see the file COPYING; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  17  *
  18  * event.c: implements the BFD loop event handlers.
  19  *
  20  * Authors
  21  * -------
  22  * Rafael Zalamena <rzalamena@opensourcerouting.org>
  23  */
  24
  25 #include <zebra.h>
  26
  27 #include "bfd.h"
  28
  29 void tv_normalize(struct timeval *tv);
  30
  31 void tv_normalize(struct timeval *tv)
  32 {
  33         /* Remove seconds part from microseconds. */
  34         tv->tv_sec = tv->tv_usec / 1000000;
  35         tv->tv_usec = tv->tv_usec % 1000000;
  36 }
  37
  38 void bfd_recvtimer_update(struct bfd_session *bs)
  39 {
  40         struct timeval tv = {.tv_sec = 0, .tv_usec = bs->detect_TO};
  41
  42         /* Remove previous schedule if any. */
  43         bfd_recvtimer_delete(bs);
  44
  45         /* Don't add event if peer is deactivated. */
  46         if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN))
  47                 return;
  48
  49         tv_normalize(&tv);
  50 #ifdef BFD_EVENT_DEBUG
  51         log_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec, tv.tv_usec);
  52 #endif /* BFD_EVENT_DEBUG */
  53
  54         thread_add_timer_tv(master, bfd_recvtimer_cb, bs, &tv,
  55                             &bs->recvtimer_ev);
  56 }
  57
  58 void bfd_echo_recvtimer_update(struct bfd_session *bs)
  59 {
  60         struct timeval tv = {.tv_sec = 0, .tv_usec = bs->echo_detect_TO};
  61
  62         /* Remove previous schedule if any. */
  63         bfd_echo_recvtimer_delete(bs);
  64
  65         /* Don't add event if peer is deactivated. */
  66         if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN))
  67                 return;
  68
  69         tv_normalize(&tv);
  70 #ifdef BFD_EVENT_DEBUG
  71         log_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec, tv.tv_usec);
  72 #endif /* BFD_EVENT_DEBUG */
  73
  74         thread_add_timer_tv(master, bfd_echo_recvtimer_cb, bs, &tv,
  75                             &bs->echo_recvtimer_ev);
  76 }
  77
  78 void bfd_xmttimer_update(struct bfd_session *bs, uint64_t jitter)
  79 {
  80         struct timeval tv = {.tv_sec = 0, .tv_usec = jitter};
  81
  82         /* Remove previous schedule if any. */
  83         bfd_xmttimer_delete(bs);
  84
  85         /* Don't add event if peer is deactivated. */
  86         if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN))
  87                 return;
  88
  89         tv_normalize(&tv);
  90 #ifdef BFD_EVENT_DEBUG
  91         log_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec, tv.tv_usec);
  92 #endif /* BFD_EVENT_DEBUG */
  93
  94         thread_add_timer_tv(master, bfd_xmt_cb, bs, &tv, &bs->xmttimer_ev);
  95 }
  96
  97 void bfd_echo_xmttimer_update(struct bfd_session *bs, uint64_t jitter)
  98 {
  99         struct timeval tv = {.tv_sec = 0, .tv_usec = jitter};
 100
 101         /* Remove previous schedule if any. */
 102         bfd_echo_xmttimer_delete(bs);
 103
 104         /* Don't add event if peer is deactivated. */
 105         if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN))
 106                 return;
 107
 108         tv_normalize(&tv);
 109 #ifdef BFD_EVENT_DEBUG
 110         log_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec, tv.tv_usec);
 111 #endif /* BFD_EVENT_DEBUG */
 112
 113         thread_add_timer_tv(master, bfd_echo_xmt_cb, bs, &tv,
 114                             &bs->echo_xmttimer_ev);
 115 }
 116
 117 void bfd_recvtimer_delete(struct bfd_session *bs)
 118 {
 119         THREAD_OFF(bs->recvtimer_ev);
 120 }
 121
 122 void bfd_echo_recvtimer_delete(struct bfd_session *bs)
 123 {
 124         THREAD_OFF(bs->echo_recvtimer_ev);
 125 }
 126
 127 void bfd_xmttimer_delete(struct bfd_session *bs)
 128 {
 129         THREAD_OFF(bs->xmttimer_ev);
 130 }
 131
 132 void bfd_echo_xmttimer_delete(struct bfd_session *bs)
 133 {
 134         THREAD_OFF(bs->echo_xmttimer_ev);
 135 }