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mwan3: Packet Loss & Latency Check

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1. Test link quality based on packet loss & latency w.r.t. pre-defined high and low watermark values.
2. Extended ubus support to provide packet loss & latency information per wan per track_ip

Signed-off-by: Nishant Sharma <codemarauder@gmail.com>
This commit is contained in:
Nishant Sharma
2018-04-22 12:49:46 +05:30
committed by Florian Eckert
parent f35a29fd2b
commit 1a33492ff8
4 changed files with 70 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
net/mwan3/files/usr/sbin/mwan3track
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@@ -86,6 +86,11 @@ main() {
config_get failure_interval $1 failure_interval $interval
config_get_bool keep_failure_interval $1 keep_failure_interval 0
config_get recovery_interval $1 recovery_interval $interval
config_get_bool check_quality $1 check_quality 0
config_get failure_latency $1 failure_latency 1000
config_get recovery_latency $1 recovery_latency 500
config_get failure_loss $1 failure_loss 40
config_get recovery_loss $1 recovery_loss 10
local score=$(($down+$up))
local track_ips=$(echo $* | cut -d ' ' -f 5-99)
@@ -93,6 +98,10 @@ main() {
local lost=0
local sleep_time=0
local turn=0
local result
local ping_result
local loss=0
local latency=0
if [ "$STATUS" = "unknown" ]; then
echo "unknown" > /var/run/mwan3track/$1/STATUS
@@ -109,23 +118,64 @@ main() {
if [ $host_up_count -lt $reliability ]; then
case "$track_method" in
ping)
ping -I $DEVICE -c $count -W $timeout -s $size -q $track_ip &> /dev/null ;;
if [ $check_quality -eq 0 ]; then
ping -I $DEVICE -c $count -W $timeout -s $size -q $track_ip &> /dev/null
result=$?
$LOG info "ping check result $track_ip on $1 ($2): $result"
else
ping_result=`ping -I $DEVICE -c $count -W $timeout -s $size -q $track_ip | tail -2`
loss=`echo "$ping_result" | grep "packet loss" | cut -d "," -f3 | awk '{print $1}' | sed -e 's/%//'`
if [ "$loss" -eq 100 ]; then
latency=999999
else
latency=`echo "$ping_result" | grep -E 'rtt|round-trip' | cut -d "=" -f2 | cut -d "/" -f2 | cut -d "." -f1`
fi
fi
;;
arping)
arping -I $DEVICE -c $count -w $timeout -q $track_ip &> /dev/null ;;
arping -I $DEVICE -c $count -w $timeout -q $track_ip &> /dev/null
result=$?
;;
httping)
httping -y $SRC_IP -c $count -t $timeout -q $track_ip &> /dev/null ;;
httping -y $SRC_IP -c $count -t $timeout -q $track_ip &> /dev/null
result=$?
;;
esac
if [ $? -eq 0 ]; then
let host_up_count++
echo "up" > /var/run/mwan3track/$1/TRACK_${track_ip}
if [ $score -le $up ]; then
$LOG info "Check ($track_method) success for target \"$track_ip\" on interface $1 ($2)"
if [ $check_quality -eq 0 ]; then
if [ $result -eq 0 ]; then
let host_up_count++
echo "up" > /var/run/mwan3track/$1/TRACK_${track_ip}
if [ $score -le $up ]; then
$LOG info "Check ($track_method) success for target \"$track_ip\" on interface $1 ($2)"
fi
else
let lost++
echo "down" > /var/run/mwan3track/$1/TRACK_${track_ip}
if [ $score -gt $up ]; then
$LOG info "Check ($track_method) failed for target \"$track_ip\" on interface $1 ($2)"
fi
fi
else
let lost++
echo "down" > /var/run/mwan3track/$1/TRACK_${track_ip}
if [ $score -gt $up ]; then
$LOG info "Check ($track_method) failed for target \"$track_ip\" on interface $1 ($2)"
if [ "$loss" -ge "$failure_loss" -o "$latency" -ge "$failure_latency" ]; then
let lost++
echo "down" > /var/run/mwan3track/$1/TRACK_${track_ip}
echo "$latency" > /var/run/mwan3track/$1/LATENCY_${track_ip}
echo "$loss" > /var/run/mwan3track/$1/LOSS_${track_ip}
if [ $score -gt $up ]; then
$LOG info "Failed: Latency=$latency ms Loss=$loss% for target \"$track_ip\" on interface $1 ($2)"
fi
elif [ "$loss" -le "$recovery_loss" -a "$latency" -le "$recovery_latency" ]; then
let host_up_count++
echo "up" > /var/run/mwan3track/$1/TRACK_${track_ip}
echo "$latency" > /var/run/mwan3track/$1/LATENCY_${track_ip}
echo "$loss" > /var/run/mwan3track/$1/LOSS_${track_ip}
if [ $score -le $up ]; then
$LOG info "Success: Latency=$latency ms Loss=$loss% for target \"$track_ip\" on interface $1 ($2)"
fi
else
echo "skipped" > /var/run/mwan3track/$1/TRACK_${track_ip}
fi
fi
else