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retry arping one more time in ifup-eth when sendto failed #490

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merged 1 commit into from
Jan 21, 2025
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retry arping one more time in ifup-eth when sendto failed #490

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13 changes: 10 additions & 3 deletions network-scripts/ifup-eth
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Original file line number Diff line number Diff line change
Expand Up @@ -293,10 +293,17 @@

if ! LC_ALL=C ip addr ls ${REALDEVICE} | LC_ALL=C grep -q "${ipaddr[$idx]}/${prefix[$idx]}" ; then
if [ "${REALDEVICE}" != "lo" ] && ! is_false "${arpcheck[$idx]}"; then
ARPING=$(/sbin/arping -c 2 -w ${ARPING_WAIT:-3} -D -I ${REALDEVICE} ${ipaddr[$idx]})
if [ $? = 1 ]; then
for (( tries=0; tries<${ARPING_TRIES:=1}; tries++ )); do
ARPING=$(/sbin/arping -c 2 -w ${ARPING_WAIT:-3} -D -I ${REALDEVICE} ${ipaddr[$idx]})
[ "$?" -eq 0 ] && break
ARPINGMAC=$(echo $ARPING | sed -ne 's/.*\[\(.*\)\].*/\1/p')
net_log $"Error, some other host ($ARPINGMAC) already uses address ${ipaddr[$idx]}."
if [ -n "${ARPINGMAC}" ]; then
net_log $"Error, some other host ($ARPINGMAC) already uses address ${ipaddr[$idx]}."
exit 1
fi
done
if [ "${tries}" -eq "${ARPING_TRIES}" ]; then
net_log $"arping failed after $tries tries"
exit 1
fi
fi
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