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#!/bin/sh
do_vlan_config() {
local device="$1"
local id="$2"
local newname="$3"
local nametype="$4"
if ! [ -d /proc/net/vlan ]; then
modprobe 8021q
fi
vconfig set_name_type ${nametype}
vconfig add ${device} ${id}
}
# Preferred method:
# Autoguess construction from #520147
case "$IFACE" in
*#*) exit 0 ;;
*:*) exit 0 ;;
vlan*.*) exit 0 ;;
vlan*) VLAN_ID="${IFACE#vlan}" NAME1=VLAN;;
*.*) RAW_DEVICE="${IFACE%.*}"; VLAN_ID="${IFACE##*.}" NAME1=DEV;;
*) [ -n "${IF_VLAN_ID}" -o -n "${IF_VLAN_RAW_DEVICE}" ] || exit 0 ;;
esac
case "$VLAN_ID" in
[1-9]*) NAME2=VID_NO_PAD;;
0???) NAME2=VID;;
0*) NAME2=VID_NO_PAD;; # Failsafe fallback in case of backward compatability
esac
if [ -n "$IF_VLAN_RAW_DEVICE" ]; then
RAW_DEVICE="$IF_VLAN_RAW_DEVICE"
fi
# Strip leading 0s
VLAN_ID="${VLAN_ID#0}"
VLAN_ID="${VLAN_ID#0}"
VLAN_ID="${VLAN_ID#0}"
VLAN_ID="${VLAN_ID#0}"
VLAN_ID="$(($VLAN_ID))"
if [ -n "$IF_VLAN_ID" ]; then
VLAN_ID="$IF_VLAN_ID"
fi
if [ -z "$VLAN_ID" -o -z "$RAW_DEVICE" ]; then
exit 1
fi
if [ -n "$RAW_DEVICE" ] && [ -n "$VLAN_ID" ]; then
if ! ip link show dev "$RAW_DEVICE" > /dev/null; then
echo "$RAW_DEVICE does not exist, unable to create $IFACE"
exit 1
fi
ip link set up dev "$RAW_DEVICE"
do_vlan_config "$RAW_DEVICE" "$VLAN_ID" "$IFACE" "${NAME1}_PLUS_${NAME2}"
if ! ip link show dev "$IFACE" > /dev/null; then
echo "Failed to create vlan device $IFACE on device $RAW_DEVICE with tag $VLAN_ID"
exit 1
fi
fi
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