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#!/bin/sh
# Copyright 2018 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
SOFS_MNT=/var/sofs
SOFS_MACDIR=${SOFS_MNT}/factory-settings/network/mac
read_hw_mac() {
local iface="$1"
cat /sys/class/net/"$iface"/address 2>/dev/null
}
set_hw_mac() {
local iface="$1"
local mac="$2"
ip link show dev "$iface" | grep -q "${iface}:.*\<UP\>" 2>/dev/null
local up=$?
[[ $up -eq 0 ]] && ip link set dev "$iface" down
ip link set dev "$iface" address "$mac"
[[ $up -eq 0 ]] && ip link set dev "$iface" up
}
read_sofs_mac() {
local iface="$1"
cat "${SOFS_MACDIR}/${iface}" 2>/dev/null
}
read_fw_env_mac() {
local envname="$1"
fw_printenv "$envname" 2>/dev/null | sed "s/^$envname=//"
}
set_fw_env_mac() {
local envname="$1"
local mac="$2"
fw_setenv "$envname" "$mac"
}
create_macdir() {
if [ -a ${SOFS_MACDIR} ]; then
if [ ! -d ${SOFS_MACDIR} ]; then
rm -rf ${SOFS_MACDIR}
mkdir -p ${SOFS_MACDIR}
fi
else
mkdir -p ${SOFS_MACDIR}
fi
return 0
}
mac_check() {
local iface="$1"
local envname="$2"
# Read the MAC address in use by the NIC
local hw_mac=$(read_hw_mac "$iface")
# Read the MAC address stored in the non-volatile file provisioned in
# manufacturing.
local sofs_mac=$(read_sofs_mac "$iface")
if [ -n "$sofs_mac" ] && [ "$hw_mac" != "$sofs_mac" ]; then
# A factory assigned address was found, and it is newly assigned.
# Update the active interface and save the new value to the u-boot
# environment.
set_hw_mac "$iface" "$sofs_mac"
set_fw_env_mac "$envname" "$sofs_mac"
return $?
elif [ -n "$hw_mac" ]; then
# Read the MAC address stored by U-Boot
local fw_env_mac=$(read_fw_env_mac "$envname")
if [ -z "$fw_env_mac" ] || [ "$fw_env_mac" != "$hw_mac" ]; then
set_fw_env_mac "$envname" "$hw_mac"
return $?
fi
else
# Could not identify a MAC address
return 255
fi
return 0
}
create_macdir
error=0
first_error_seen=0
while read IFACE UBDEV; do
mac_check "$IFACE" "$UBDEV"
error=$?
if [ $error -ne 0 ] && [ $first_error_seen -eq 0 ]; then
first_error_seen=$error
fi
done <<-END_CONF
eth0 eth1addr
eth1 ethaddr
END_CONF
exit $first_error_seen
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