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testnet: avoid potential race condition

Browse source 
Instead of running a second instance of testnet once and in parallel
with the background task on interface up/down, the background task is
woken up. The avoids the potential for a race where under certain
circumstances a ubus event for internet up or down may never be sent.

Also remove unused include and add missing quotation.
This commit is contained in:
Erik Karlsson 2024-03-25 12:01:49 +01:00 • committed by Sukru Senli
parent e383d1d145
commit ec7ba74900
2 changed files with 19 additions and 16 deletions
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2
testnet/files/etc/init.d/testnet
View file

@ -19,5 +19,5 @@ start_service() {
}
reload_service() {
[ -n "$TESTNET" ] && procd_running testnet && "$TESTNET" once
procd_send_signal testnet
}

33
testnet/files/sbin/testnet
View file

@ -1,6 +1,7 @@
#!/bin/sh
. /lib/functions.sh
RELOAD=0
WAITING=0
NETCON=0
LASTSTATUS=""
@ -13,32 +14,32 @@ test_connection() {
local defroute="$(ip r | grep default | awk '{print$3}' | head -1)"
local def6route="$(ip -f inet6 r | grep default | awk '{print$3}')"
local ping6dev="$(ip -f inet6 r | grep default | awk '{print$5}')"
local resolvfile="$(uci -q get dhcp.@dnsmasq[0].resolvfile)"
local resolvfile="$(uci -q get 'dhcp.@dnsmasq[0].resolvfile')"
if [ -n "$addr" ]; then
ping -q -w 5 -c 1 $addr >/dev/null 2>&1 && return 0
ping -q -w 5 -c 1 "$addr" >/dev/null 2>&1 && return 0
elif [ -n "$defroute" ]; then
ping -q -w 5 -c 1 $defroute >/dev/null 2>&1 && return 0
ping -q -w 5 -c 1 "$defroute" >/dev/null 2>&1 && return 0
if [ -e "$resolvfile" ]; then
for nmsrv in $(grep nameserver "$resolvfile" | awk '{print$2}'); do
ping -q -w 5 -c 1 $nmsrv >/dev/null 2>&1 && return 0
ping -q -w 5 -c 1 "$nmsrv" >/dev/null 2>&1 && return 0
done
fi
elif [ -n "$def6route" -a -n "$ping6dev" ]; then
ndisc6 -w 5 -1 $def6route $ping6dev >/dev/null 2>&1 && return 0
ndisc6 -w 5 -1 "$def6route" "$ping6dev" >/dev/null 2>&1 && return 0
fi
return 1
}
internet_test() {
local link dest
local dest
# use the destination address given in config for connectivity check
dest="$(uci -q get testnet.global.destination)"
# for backwards compatibility
[ -n "$dest" ] || dest="$(uci -q get system.@system[0].netping_addr)"
[ -n "$dest" ] || dest="$(uci -q get 'system.@system[0].netping_addr')"
test_connection $dest
test_connection "$dest"
if [ "$?" -eq 0 ]; then
NETCON=1
@ -52,7 +53,7 @@ internet_test() {
connectivity_test() {
internet_test
if [ $NETCON -eq 1 ]; then
if [ "$NETCON" -eq 1 ]; then
CURSTATUS=1
[ "$CURSTATUS" == "$LASTSTATUS" ] || ubus send internet '{"status" : "online"}'
LASTSTATUS=1
@ -63,12 +64,14 @@ connectivity_test() {
fi
}
if [ "$1" == "once" ]; then
connectivity_test
exit 0
fi
trap RELOAD=1 HUP
while true; do
if [ "$WAITING" -eq 0 ]; then
sleep "$SLEEP_TIME" &
WAITING=1
fi
RELOAD=0
connectivity_test
sleep $SLEEP_TIME
[ "$RELOAD" -eq 0 ] && wait && WAITING=0
done