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[BASH] Function to convert MAC address to IPv6 link-local address
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mac_to_ipv6() { | |
local HWADDR="$1" IFACE="$2" | |
local -a OCTETS | |
local IPV6ADDR | |
if [[ -z "$IFACE" ]]; then | |
IFACE=$(ip route | grep ^default | sed 's/^.* dev //') | |
fi | |
OCTETS=( ${HWADDR//:/\ } ) | |
OCTETS[0]=$(printf %02x $((16#${OCTETS[0]}+0x02))) | |
IPV6ADDR="fe80::${OCTETS[0]}${OCTETS[1]}:${OCTETS[2]}ff:fe${OCTETS[3]}:${OCTETS[4]}${OCTETS[5]}%$IFACE" | |
echo "$IPV6ADDR" | |
} |
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