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docker: better handling of IPv6 /128 subnets

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This commit is contained in:
bergware
2025-05-08 23:33:32 +02:00
parent 756d008c50
commit 012e486414
1 changed files with 3 additions and 3 deletions
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6
etc/rc.d/rc.docker
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@@ -356,10 +356,10 @@ docker_network_start(){
GATEWAY=$(ip -4 route show default dev $NETWORK | awk '{print $3;exit}')
fi
SUBNET6=; GATEWAY6=; SERVER6=;
[[ -z ${!AUTO} || ${!AUTO} =~ "6" ]] && IPV6=$(ip -6 -br addr show scope global primary -deprecated dev $NETWORK | awk '{print $3;exit}') || IPV6=
# get IPv6 address - ignore any /128 networks
[[ -z ${!AUTO} || ${!AUTO} =~ "6" ]] && IPV6=$(ip -6 -br addr show scope global primary -deprecated dev $NETWORK | awk -v RS='[[:space:]]+' '(NR>2){print}' | grep -Pvm1 '^.+/128|^$') || IPV6=
if [[ -n $IPV6 ]]; then
# get IPV6 subnet, preset to /64 if single host address is given
[[ ${IPV6#*/} == 128 ]] && SUBNET6=$(echo $IPV6 | sed -r 's/^([^:]+):([^:]+):([^:]+):([^:]+).*$/\1:\2:\3:\4::\/64/') || SUBNET6=$(ip -6 route show $IPV6 dev $NETWORK | awk '{print $1;exit}')
SUBNET6=$(ip -6 route show $IPV6 dev $NETWORK | awk '{print $1;exit}')
SERVER6=${IPV6%/*}
GATEWAY6=$(ip -6 route show default dev $NETWORK | awk '{print $3;exit}')
# replace link local address for first address in subnet