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Fix MTU detection

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This commit is contained in:
Ycarus (Yannick Chabanois) 2022-07-27 13:30:24 +02:00
parent 81f221ec07
commit 04c4161845
2 changed files with 27 additions and 4 deletions
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21
openmptcprouter/files/bin/omr-mtu6 Executable file
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@ -0,0 +1,21 @@
#!/bin/sh
PKT_SIZE=1472
INTERFACE="$1"
HOSTNAME="$2"
#count=$(ping -q -w 1 -M do -c 1 -s $PKT_SIZE -I $INTERFACE $HOSTNAME | grep -cE 'Message too long|100% packet loss')
#count=$(ping -B -w 1 -M do -c 1 -s $PKT_SIZE -I $INTERFACE $HOSTNAME 2>&1 | grep -c 'Message too long')
count=$(ping -6 -B -w 2 -M do -c 3 -s $PKT_SIZE -I $INTERFACE $HOSTNAME 2>&1 | grep -cE 'Message too long|100% packet loss')
while [ $count -ge 1 ]; do
PKT_SIZE=$((PKT_SIZE - 1))
if [ "$PKT_SIZE" -lt "1252" ]; then
exit 0
fi
#count=$(ping -q -w 1 -M do -c 1 -s $PKT_SIZE -I $INTERFACE $HOSTNAME | grep -cE 'Message too long|100% packet loss')
#count=$(ping -B -w 1 -M do -c 1 -s $PKT_SIZE -I $INTERFACE $HOSTNAME 2>&1 | grep -c 'Message too long')
count=$(ping -6 -B -w 2 -M do -c 3 -s $PKT_SIZE -I $INTERFACE $HOSTNAME 2>&1 | grep -cE 'Message too long|100% packet loss')
done
printf "$((PKT_SIZE + 28))"