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 (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) ||
  47             bs->sock == -1)
  48                 return;
  49
  50         tv_normalize(&tv);
  51 #ifdef BFD_EVENT_DEBUG
  52         zlog_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec,
  53                    tv.tv_usec);
  54 #endif /* BFD_EVENT_DEBUG */
  55
  56         thread_add_timer_tv(master, bfd_recvtimer_cb, bs, &tv,
  57                             &bs->recvtimer_ev);
  58 }
  59
  60 void bfd_echo_recvtimer_update(struct bfd_session *bs)
  61 {
  62         struct timeval tv = {.tv_sec = 0, .tv_usec = bs->echo_detect_TO};
  63
  64         /* Remove previous schedule if any. */
  65         bfd_echo_recvtimer_delete(bs);
  66
  67         /* Don't add event if peer is deactivated. */
  68         if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) ||
  69             bs->sock == -1)
  70                 return;
  71
  72         tv_normalize(&tv);
  73 #ifdef BFD_EVENT_DEBUG
  74         zlog_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec,
  75                    tv.tv_usec);
  76 #endif /* BFD_EVENT_DEBUG */
  77
  78         thread_add_timer_tv(master, bfd_echo_recvtimer_cb, bs, &tv,
  79                             &bs->echo_recvtimer_ev);
  80 }
  81
  82 void bfd_xmttimer_update(struct bfd_session *bs, uint64_t jitter)
  83 {
  84         struct timeval tv = {.tv_sec = 0, .tv_usec = jitter};
  85
  86         /* Remove previous schedule if any. */
  87         bfd_xmttimer_delete(bs);
  88
  89         /* Don't add event if peer is deactivated. */
  90         if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) ||
  91             bs->sock == -1)
  92                 return;
  93
  94         tv_normalize(&tv);
  95 #ifdef BFD_EVENT_DEBUG
  96         zlog_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec,
  97                    tv.tv_usec);
  98 #endif /* BFD_EVENT_DEBUG */
  99
 100         thread_add_timer_tv(master, bfd_xmt_cb, bs, &tv, &bs->xmttimer_ev);
 101 }
 102
 103 void bfd_echo_xmttimer_update(struct bfd_session *bs, uint64_t jitter)
 104 {
 105         struct timeval tv = {.tv_sec = 0, .tv_usec = jitter};
 106
 107         /* Remove previous schedule if any. */
 108         bfd_echo_xmttimer_delete(bs);
 109
 110         /* Don't add event if peer is deactivated. */
 111         if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) ||
 112             bs->sock == -1)
 113                 return;
 114
 115         tv_normalize(&tv);
 116 #ifdef BFD_EVENT_DEBUG
 117         zlog_debug("%s: sec = %ld, usec = %ld", __func__, tv.tv_sec,
 118                    tv.tv_usec);
 119 #endif /* BFD_EVENT_DEBUG */
 120
 121         thread_add_timer_tv(master, bfd_echo_xmt_cb, bs, &tv,
 122                             &bs->echo_xmttimer_ev);
 123 }
 124
 125 void bfd_recvtimer_delete(struct bfd_session *bs)
 126 {
 127         THREAD_OFF(bs->recvtimer_ev);
 128 }
 129
 130 void bfd_echo_recvtimer_delete(struct bfd_session *bs)
 131 {
 132         THREAD_OFF(bs->echo_recvtimer_ev);
 133 }
 134
 135 void bfd_xmttimer_delete(struct bfd_session *bs)
 136 {
 137         THREAD_OFF(bs->xmttimer_ev);
 138 }
 139
 140 void bfd_echo_xmttimer_delete(struct bfd_session *bs)
 141 {
 142         THREAD_OFF(bs->echo_xmttimer_ev);
 143 }