1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
|
#!/bin/sh
#
# Copyright (C) 2010 segal.di.ubi.pt
# Copyright (C) 2020 nbembedded.com
#
# This is free software, licensed under the GNU General Public License v2.
#
get_ping_size() {
ps=$1
case "$ps" in
small)
ps="1"
;;
windows)
ps="32"
;;
standard)
ps="56"
;;
big)
ps="248"
;;
huge)
ps="1492"
;;
jumbo)
ps="9000"
;;
*)
echo "Error: invalid ping_size. ping_size should be either: small, windows, standard, big, huge or jumbo" 1>&2
echo "Corresponding ping packet sizes (bytes): small=1, windows=32, standard=56, big=248, huge=1492, jumbo=9000" 1>&2
;;
esac
echo $ps
}
get_ping_family_flag() {
family=$1
case "$family" in
any)
family=""
;;
ipv4)
family="-4"
;;
ipv6)
family="-6"
;;
*)
echo "Error: invalid address_family \"$family\". address_family should be one of: any, ipv4, ipv6" 1>&2
;;
esac
echo $family
}
reboot_now() {
reboot &
[ "$1" -ge 1 ] && {
sleep "$1"
echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger # Will immediately reboot the system without syncing or unmounting your disks.
}
}
watchcat_periodic() {
failure_period="$1"
force_reboot_delay="$2"
sleep "$failure_period" && reboot_now "$force_reboot_delay"
}
watchcat_restart_modemmanager_iface() {
[ "$2" -gt 0 ] && {
logger -p daemon.info -t "watchcat[$$]" "Resetting current-bands to 'any' on modem: \"$1\" now."
/usr/bin/mmcli -m any --set-current-bands=any
}
logger -p daemon.info -t "watchcat[$$]" "Reconnecting modem: \"$1\" now."
/etc/init.d/modemmanager restart
ifup "$1"
}
watchcat_restart_network_iface() {
logger -p daemon.info -t "watchcat[$$]" "Restarting network interface: \"$1\"."
ip link set "$1" down
ip link set "$1" up
}
watchcat_run_script() {
logger -p daemon.info -t "watchcat[$$]" "Running script \"$1\" for network interface: \"$2\"."
"$1" "$2"
}
watchcat_restart_all_network() {
logger -p daemon.info -t "watchcat[$$]" "Restarting networking now by running: /etc/init.d/network restart"
/etc/init.d/network restart
}
watchcat_monitor_network() {
failure_period="$1"
ping_hosts="$2"
ping_frequency_interval="$3"
ping_size="$4"
iface="$5"
mm_iface_name="$6"
mm_iface_unlock_bands="$7"
address_family="$8"
script="$9"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
[ "$time_now" -lt "$failure_period" ] && sleep "$((failure_period - time_now))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
time_lastcheck_withinternet="$time_now"
ping_size="$(get_ping_size "$ping_size")"
ping_family="$(get_ping_family_flag "$address_family")"
while true; do
# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_diff="$((time_now - time_lastcheck))"
[ "$time_diff" -lt "$ping_frequency_interval" ] && sleep "$((ping_frequency_interval - time_diff))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
for host in $ping_hosts; do
if [ "$iface" != "" ]; then
ping_result="$(
ping $ping_family -I "$iface" -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
else
ping_result="$(
ping $ping_family -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
fi
if [ "$ping_result" -eq 0 ]; then
time_lastcheck_withinternet="$time_now"
else
if [ "$script" != "" ]; then
logger -p daemon.info -t "watchcat[$$]" "Could not reach $host via \"$iface\" for \"$((time_now - time_lastcheck_withinternet))\" seconds. Running script after reaching \"$failure_period\" seconds"
elif [ "$iface" != "" ]; then
logger -p daemon.info -t "watchcat[$$]" "Could not reach $host via \"$iface\" for \"$((time_now - time_lastcheck_withinternet))\" seconds. Restarting \"$iface\" after reaching \"$failure_period\" seconds"
else
logger -p daemon.info -t "watchcat[$$]" "Could not reach $host for \"$((time_now - time_lastcheck_withinternet))\" seconds. Restarting networking after reaching \"$failure_period\" seconds"
fi
fi
done
[ "$((time_now - time_lastcheck_withinternet))" -ge "$failure_period" ] && {
if [ "$script" != "" ]; then
watchcat_run_script "$script" "$iface"
else
if [ "$mm_iface_name" != "" ]; then
watchcat_restart_modemmanager_iface "$mm_iface_name" "$mm_iface_unlock_bands"
fi
if [ "$iface" != "" ]; then
watchcat_restart_network_iface "$iface"
else
watchcat_restart_all_network
fi
fi
/etc/init.d/watchcat start
# Restart timer cycle.
time_lastcheck_withinternet="$time_now"
}
done
}
watchcat_ping() {
failure_period="$1"
force_reboot_delay="$2"
ping_hosts="$3"
ping_frequency_interval="$4"
ping_size="$5"
address_family="$6"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
[ "$time_now" -lt "$failure_period" ] && sleep "$((failure_period - time_now))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
time_lastcheck_withinternet="$time_now"
ping_size="$(get_ping_size "$ping_size")"
ping_family="$(get_ping_family_flag "$address_family")"
while true; do
# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_diff="$((time_now - time_lastcheck))"
[ "$time_diff" -lt "$ping_frequency_interval" ] && sleep "$((ping_frequency_interval - time_diff))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
for host in $ping_hosts; do
if [ "$iface" != "" ]; then
ping_result="$(
ping $ping_family -I "$iface" -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
else
ping_result="$(
ping $ping_family -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
fi
if [ "$ping_result" -eq 0 ]; then
time_lastcheck_withinternet="$time_now"
else
logger -p daemon.info -t "watchcat[$$]" "Could not reach $host for $((time_now - time_lastcheck_withinternet)). Rebooting after reaching $failure_period"
fi
done
[ "$((time_now - time_lastcheck_withinternet))" -ge "$failure_period" ] && reboot_now "$force_reboot_delay"
done
}
mode="$1"
# Fix potential typo in mode and provide backward compatibility.
[ "$mode" = "allways" ] && mode="periodic_reboot"
[ "$mode" = "always" ] && mode="periodic_reboot"
[ "$mode" = "ping" ] && mode="ping_reboot"
case "$mode" in
periodic_reboot)
# args from init script: period forcedelay
watchcat_periodic "$2" "$3"
;;
ping_reboot)
# args from init script: period forcedelay pinghosts pingperiod pingsize addressfamily
watchcat_ping "$2" "$3" "$4" "$5" "$6" "$7"
;;
restart_iface)
# args from init script: period pinghosts pingperiod pingsize interface mmifacename unlockbands addressfamily
watchcat_monitor_network "$2" "$3" "$4" "$5" "$6" "$7" "$8" "$9" ""
;;
run_script)
# args from init script: period pinghosts pingperiod pingsize interface addressfamily script
watchcat_monitor_network "$2" "$3" "$4" "$5" "$6" "" "" "$7" "$8"
;;
*)
echo "Error: invalid mode selected: $mode"
;;
esac
|