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e9e2c950 RZ |
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 | ||
744f824a RZ |
42 | /* Remove previous schedule if any. */ |
43 | bfd_recvtimer_delete(bs); | |
44 | ||
e9e2c950 | 45 | /* Don't add event if peer is deactivated. */ |
b88113ef | 46 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) || |
d245e522 | 47 | bs->sock == -1) |
e9e2c950 RZ |
48 | return; |
49 | ||
50 | tv_normalize(&tv); | |
e9e2c950 | 51 | |
e9e2c950 RZ |
52 | thread_add_timer_tv(master, bfd_recvtimer_cb, bs, &tv, |
53 | &bs->recvtimer_ev); | |
54 | } | |
55 | ||
56 | void bfd_echo_recvtimer_update(struct bfd_session *bs) | |
57 | { | |
58 | struct timeval tv = {.tv_sec = 0, .tv_usec = bs->echo_detect_TO}; | |
59 | ||
744f824a RZ |
60 | /* Remove previous schedule if any. */ |
61 | bfd_echo_recvtimer_delete(bs); | |
62 | ||
e9e2c950 | 63 | /* Don't add event if peer is deactivated. */ |
b88113ef | 64 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) || |
d245e522 | 65 | bs->sock == -1) |
e9e2c950 RZ |
66 | return; |
67 | ||
68 | tv_normalize(&tv); | |
e9e2c950 | 69 | |
e9e2c950 RZ |
70 | thread_add_timer_tv(master, bfd_echo_recvtimer_cb, bs, &tv, |
71 | &bs->echo_recvtimer_ev); | |
72 | } | |
73 | ||
74 | void bfd_xmttimer_update(struct bfd_session *bs, uint64_t jitter) | |
75 | { | |
76 | struct timeval tv = {.tv_sec = 0, .tv_usec = jitter}; | |
77 | ||
744f824a RZ |
78 | /* Remove previous schedule if any. */ |
79 | bfd_xmttimer_delete(bs); | |
80 | ||
e9e2c950 | 81 | /* Don't add event if peer is deactivated. */ |
b88113ef | 82 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) || |
d245e522 | 83 | bs->sock == -1) |
e9e2c950 RZ |
84 | return; |
85 | ||
86 | tv_normalize(&tv); | |
e9e2c950 | 87 | |
e9e2c950 RZ |
88 | thread_add_timer_tv(master, bfd_xmt_cb, bs, &tv, &bs->xmttimer_ev); |
89 | } | |
90 | ||
91 | void bfd_echo_xmttimer_update(struct bfd_session *bs, uint64_t jitter) | |
92 | { | |
93 | struct timeval tv = {.tv_sec = 0, .tv_usec = jitter}; | |
94 | ||
744f824a RZ |
95 | /* Remove previous schedule if any. */ |
96 | bfd_echo_xmttimer_delete(bs); | |
97 | ||
e9e2c950 | 98 | /* Don't add event if peer is deactivated. */ |
b88113ef | 99 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN) || |
d245e522 | 100 | bs->sock == -1) |
e9e2c950 RZ |
101 | return; |
102 | ||
103 | tv_normalize(&tv); | |
e9e2c950 | 104 | |
e9e2c950 RZ |
105 | thread_add_timer_tv(master, bfd_echo_xmt_cb, bs, &tv, |
106 | &bs->echo_xmttimer_ev); | |
107 | } | |
108 | ||
109 | void bfd_recvtimer_delete(struct bfd_session *bs) | |
110 | { | |
8529e180 | 111 | THREAD_OFF(bs->recvtimer_ev); |
e9e2c950 RZ |
112 | } |
113 | ||
114 | void bfd_echo_recvtimer_delete(struct bfd_session *bs) | |
115 | { | |
8529e180 | 116 | THREAD_OFF(bs->echo_recvtimer_ev); |
e9e2c950 RZ |
117 | } |
118 | ||
119 | void bfd_xmttimer_delete(struct bfd_session *bs) | |
120 | { | |
8529e180 | 121 | THREAD_OFF(bs->xmttimer_ev); |
e9e2c950 RZ |
122 | } |
123 | ||
124 | void bfd_echo_xmttimer_delete(struct bfd_session *bs) | |
125 | { | |
8529e180 | 126 | THREAD_OFF(bs->echo_xmttimer_ev); |
e9e2c950 | 127 | } |