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
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
|
#!/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.
#
. /lib/network/config.sh
. /lib/functions/network.sh
# Accept the historical real-device input while also handling @logical
# interface references used by other OpenWrt configs.
watchcat_resolve_ping_iface() {
local iface="$1"
local logical device network
[ -n "$iface" ] || return 1
case "$iface" in
@*)
logical="${iface#@}"
[ -n "$logical" ] || return 1
if network_get_device device "$logical"; then
printf '%s\n' "$device"
return 0
fi
printf '%s\n' "$iface"
return 1
;;
esac
network="$(find_config "$iface")"
if [ -n "$network" ]; then
printf '%s\n' "$iface"
return 0
fi
if network_get_device device "$iface"; then
printf '%s\n' "$device"
return 0
fi
printf '%s\n' "$iface"
return 1
}
watchcat_resolve_restart_iface() {
local iface="$1"
local network device
[ -n "$iface" ] || return 1
case "$iface" in
@*)
network="${iface#@}"
[ -n "$network" ] || return 1
if ! network_get_device device "$network"; then
printf '%s\n' "$network"
return 1
fi
printf '%s\n' "$network"
return 0
;;
esac
network="$(find_config "$iface")"
if [ -n "$network" ]; then
printf '%s\n' "$network"
return 0
fi
if network_get_device device "$iface"; then
printf '%s\n' "$iface"
return 0
fi
printf '%s\n' "$iface"
return 1
}
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() {
local iface="$1"
local network="$2"
[ -z "$network" ] && network="$(watchcat_resolve_restart_iface "$iface")"
logger -p daemon.info -t "watchcat[$$]" "Restarting network interface: \"$1\" (network: \"$network\")."
ifup "$network"
}
watchcat_run_script() {
logger -p daemon.info -t "watchcat[$$]" "Running script \"$1\" for network interface: \"$2\"."
"$1" "$2"
}
watchcat_restart_all_network() {
logger -p daemon.info -t "watchcat[$$]" "Restarting networking now by running: /etc/init.d/network restart"
/etc/init.d/network restart
}
watchcat_monitor_network() {
failure_period="$1"
ping_hosts="$2"
ping_frequency_interval="$3"
ping_size="$4"
iface="$5"
mm_iface_name="$6"
mm_iface_unlock_bands="$7"
address_family="$8"
script="$9"
ping_iface=""
restart_iface=""
reset_failure_timer=""
if [ "$#" -gt 9 ]; then
shift 9
reset_failure_timer="$1"
fi
[ "$mm_iface_name" = "null" ] && mm_iface_name=""
if [ "$iface" != "" ]; then
if ! ping_iface="$(watchcat_resolve_ping_iface "$iface")"; then
logger -p daemon.warn -t "watchcat[$$]" "Could not resolve interface \"$iface\" for pinging."
case "$iface" in
@*) ping_iface="" ;;
*) ping_iface="$iface" ;;
esac
fi
if ! restart_iface="$(watchcat_resolve_restart_iface "$iface")"; then
logger -p daemon.warn -t "watchcat[$$]" "Could not resolve interface \"$iface\" for restart."
fi
fi
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
[ "$time_now" -lt "$failure_period" ] && sleep "$((failure_period - time_now))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
time_lastcheck_withinternet="$time_now"
ping_size="$(get_ping_size "$ping_size")"
ping_family="$(get_ping_family_flag "$address_family")"
while true; do
# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_diff="$((time_now - time_lastcheck))"
[ "$time_diff" -lt "$ping_frequency_interval" ] && sleep "$((ping_frequency_interval - time_diff))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
for host in $ping_hosts; do
if [ "$ping_iface" != "" ]; then
ping_result="$(
ping $ping_family -I "$ping_iface" -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
else
ping_result="$(
ping $ping_family -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
fi
if [ "$ping_result" -eq 0 ]; then
time_lastcheck_withinternet="$time_now"
else
if [ "$script" != "" ]; then
logger -p daemon.info -t "watchcat[$$]" "Could not reach $host via \"$iface\" for \"$((time_now - time_lastcheck_withinternet))\" seconds. Will run the script after \"$failure_period\" seconds of failed reachability"
elif [ "$iface" != "" ]; then
logger -p daemon.info -t "watchcat[$$]" "Could not reach $host via \"$iface\" for \"$((time_now - time_lastcheck_withinternet))\" seconds. Will restart \"$iface\" after \"$failure_period\" seconds of failed reachability"
else
logger -p daemon.info -t "watchcat[$$]" "Could not reach $host for \"$((time_now - time_lastcheck_withinternet))\" seconds. Will restart networking after \"$failure_period\" seconds of failed reachability"
fi
fi
done
[ "$((time_now - time_lastcheck_withinternet))" -ge "$failure_period" ] && {
recovery_started="$time_now"
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" "$restart_iface"
else
watchcat_restart_all_network
fi
fi
/etc/init.d/watchcat start
# Optionally start a fresh failure window after the recovery action
# finishes instead of continuing to count the original outage.
if [ "$reset_failure_timer" = "1" ]; then
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
time_lastcheck_withinternet="$time_now"
else
time_lastcheck_withinternet="$recovery_started"
fi
}
done
}
watchcat_ping() {
failure_period="$1"
force_reboot_delay="$2"
ping_hosts="$3"
ping_frequency_interval="$4"
ping_size="$5"
address_family="$6"
iface="$7"
ping_iface=""
if [ "$iface" != "" ]; then
if ! ping_iface="$(watchcat_resolve_ping_iface "$iface")"; then
logger -p daemon.warn -t "watchcat[$$]" "Could not resolve interface \"$iface\" for pinging."
case "$iface" in
@*) ping_iface="" ;;
*) ping_iface="$iface" ;;
esac
fi
fi
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
[ "$time_now" -lt "$failure_period" ] && sleep "$((failure_period - time_now))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
time_lastcheck_withinternet="$time_now"
ping_size="$(get_ping_size "$ping_size")"
ping_family="$(get_ping_family_flag "$address_family")"
while true; do
# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_diff="$((time_now - time_lastcheck))"
[ "$time_diff" -lt "$ping_frequency_interval" ] && sleep "$((ping_frequency_interval - time_diff))"
time_now="$(cat /proc/uptime)"
time_now="${time_now%%.*}"
time_lastcheck="$time_now"
for host in $ping_hosts; do
if [ "$ping_iface" != "" ]; then
ping_result="$(
ping $ping_family -I "$ping_iface" -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
else
ping_result="$(
ping $ping_family -s "$ping_size" -c 1 "$host" &> /dev/null
echo $?
)"
fi
if [ "$ping_result" -eq 0 ]; then
time_lastcheck_withinternet="$time_now"
else
logger -p daemon.info -t "watchcat[$$]" "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 interface
watchcat_ping "$2" "$3" "$4" "$5" "$6" "$7" "$8"
;;
restart_iface)
shift
# args from init script: period pinghosts pingperiod pingsize interface
# mmifacename unlockbands addressfamily script reset_failure_timer
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="$9"
reset_failure_timer=""
if [ "$#" -gt 9 ]; then
shift 9
reset_failure_timer="$1"
fi
watchcat_monitor_network "$failure_period" "$ping_hosts" \
"$ping_frequency_interval" "$ping_size" "$iface" \
"$mm_iface_name" "$mm_iface_unlock_bands" \
"$address_family" "$script" "$reset_failure_timer"
;;
run_script)
shift
# args from init script: period pinghosts pingperiod pingsize interface
# addressfamily script reset_failure_timer
failure_period="$1"
ping_hosts="$2"
ping_frequency_interval="$3"
ping_size="$4"
iface="$5"
address_family="$6"
script="$7"
reset_failure_timer=""
if [ "$#" -gt 7 ]; then
shift 7
reset_failure_timer="$1"
fi
watchcat_monitor_network "$failure_period" "$ping_hosts" \
"$ping_frequency_interval" "$ping_size" "$iface" "" "" \
"$address_family" "$script" "$reset_failure_timer"
;;
*)
echo "Error: invalid mode selected: $mode"
;;
esac
|
