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#! /bin/bash
#
# Wrapper around ip link command that handles IPv4, IPv6 and DHCP
# This is done in shell rather than perl to avoid the overhead of recompilation
if [ $# -ne 3 ]; then
echo "Usage: $0 {add|delete} interface address"
exit 1
fi
case $1 in
add)
if [[ "$3" = "dhcp" ]]; then
exec /opt/vyatta/sbin/vyatta-interfaces.pl --dev="$2" --dhcp=start
elif [[ "$3" = "dhcpv6" ]]; then
exec /opt/vyatta/sbin/vyatta-dhcpv6-client.pl --start -ifname "$2"
elif [[ "$3" =~ ":" ]]; then
# Ipv6 address
if ! ip -6 addr list dev $2 | grep -q $3; then
exec sudo ip -6 addr add "$3" dev "$2"
fi
else
if ! ip addr list dev $2 | grep -q $3; then
exec sudo ip addr add "$3" broadcast + dev "$2"
fi
fi ;;
delete)
# Get current address from interface when using DHCP
if [[ "$3" = "dhcp" ]]; then
lease_file=/var/lib/dhcp/dhclient_"$(echo $2 | sed -e 's/\./_/')".leases;
ip=$(sed -n 's/^\s\sfixed-address\s\(.*\);/\1/p' $lease_file | sed -n '$p');
#ip_address=$(sed -n 's/^\s\sfixed-address\s\(.*\);/\1/p' $lease_file | sed -n '$p');
# T1053 we need IP/prefix for normalize-ip to function
ip_address=$(ip a s dev $2 | grep $ip | awk '{print $2}')
elif [[ "$3" = "dhcpv6" ]]; then
lease_file=/var/lib/dhcp/dhclient_v6_"$(echo $2 | sed -e 's/\./_/')".leases;
ip_address=$(sed -n 's/^\s\s\s\siaaddr\s\(.*\)\s{/\1/p' $lease_file | sed -n '$p');
else
ip_address=$3;
fi
### T1053 parameter $ip_address needs to be prefixed, not just the IP
ip_address=$(/usr/libexec/vyos/system/normalize-ip $ip_address)
if ! ip address show dev $2 2>/dev/null | grep -q "$ip_address"; then
# Address doesn't exist there, nothing to delete
exit 0
fi
if [ ! -d "/sys/class/net/$2" ]; then
# device is already gone
exit 0
elif [[ "$3" = "dhcp" ]]; then
exec /opt/vyatta/sbin/vyatta-interfaces.pl --dev="$2" --dhcp=stop
elif [[ "$3" = "dhcpv6" ]]; then
exec /opt/vyatta/sbin/vyatta-dhcpv6-client.pl --stop --ifname "$2"
elif [[ "$3" =~ ":" ]]; then
exec sudo ip -6 addr del "$ip_address" dev "$2"
else
exec sudo ip addr del "$ip_address" dev "$2"
fi ;;
*)
echo "Unknown option $1"
exit 1 ;;
esac
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