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|
#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
INTERFACE=${1:-} #optional, if not specified configure all available interfaces
ENI_FILE="/etc/network/interfaces"
PATH=/sbin:$PATH
if [ -d "/etc/network" ]; then
CONF_TYPE="eni"
elif [ -d "/etc/sysconfig/network-scripts/" ]; then
CONF_TYPE="rhel-netscripts"
SCRIPTS_PATH="/etc/sysconfig/network-scripts/"
elif [ -d "/etc/sysconfig/network/" ]; then
# SUSE network scripts location
CONF_TYPE="suse-netscripts"
SCRIPTS_PATH="/etc/sysconfig/network/"
else
echo "Unsupported network configuration type!"
exit 1
fi
ARGS="$0 $@"
function serialize_me() {
if [ "$CONF_TYPE" == "eni" ]; then
# Serialize runs so that we don't miss hot-add interfaces
FLOCKED=${FLOCKED:-}
if [ -z "$FLOCKED" ] ; then
FLOCKED=true exec flock -x $ENI_FILE $ARGS
fi
fi
}
function get_if_link() {
cat /sys/class/net/${1}/carrier || echo 0
}
function get_if_type() {
cat /sys/class/net/${1}/type
}
function interface_is_vlan() {
# Check if this is a vlan interface created on top of an Ethernet interface.
local interface=$1
# When the vlan interface is created, its mac address is copied from the
# underlying address and the address assignment type is set to 2
mac_addr_type=$(cat /sys/class/net/${interface}/addr_assign_type)
if [ "$mac_addr_type" != "2" ]; then
return 1
fi
# Only check for vlan interfaces named <interface>.<vlan>
lower_interface="$(echo $interface | cut -f1 -d'.')"
if [[ ! -z $lower_interface ]]; then
mac_addr_type=$(cat /sys/class/net/${lower_interface}/addr_assign_type)
if [ "$mac_addr_type" == "0" ]; then
return 0 # interface is vlan
fi
fi
return 1
}
function enable_interface() {
local interface=$1
local ipv6_init=$2
local ipv6_AdvManagedFlag=$3
local ipv6_AdvOtherConfigFlag=$4
serialize_me
if [ "$CONF_TYPE" == "eni" ]; then
printf "auto $interface\niface $interface inet dhcp\n\n" >>$ENI_FILE
if [ "$ipv6_init" == "True" ]; then
# Make DUID-UUID Type 4 (RFC 6355)
echo "default-duid \"\\x00\\x04$(sed 's/.\{2\}/\\x&/g' < /etc/machine-id)\";" >"/var/lib/dhcp/dhclient6--$interface.lease"
if [ $ipv6_AdvManagedFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateful address configuration
printf "iface $interface inet6 dhcp\n\n" >>$ENI_FILE
echo "DHCPv6 Stateful Configured."
elif [ $ipv6_AdvOtherConfigFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateless address configursation
printf "iface $interface inet6 auto\n\tdhcp 1\n\n" >>$ENI_FILE
echo "DHCPv6 Stateless Configured."
else
# IPv6 Autoconfiguration (SLAAC)
printf "iface $interface inet6 auto\n\tdhcp 0\n\n" >>$ENI_FILE
echo "IPv6 SLAAC Configured"
fi
fi
printf "\n" >>$ENI_FILE
elif [ "$CONF_TYPE" == "rhel-netscripts" ]; then
if [ "$(get_if_type $interface)" == "32" ]; then
printf "DEVICE=\"$interface\"\nBOOTPROTO=\"dhcp\"\nONBOOT=\"yes\"\nTYPE=\"InfiniBand\"\nCONNECTED_MODE=\"no\"\nDEFROUTE=\"yes\"\nPEERDNS=\"yes\"\nPEERROUTES=\"yes\"\nIPV4_FAILURE_FATAL=\"yes\"\nIPV6INIT=\"no\"" >"${SCRIPTS_PATH}ifcfg-$interface"
else
if interface_is_vlan $interface; then
printf "DEVICE=\"$interface\"\nBOOTPROTO=\"dhcp\"\nONBOOT=\"yes\"\nVLAN=\"yes\"\n" >"${SCRIPTS_PATH}ifcfg-$interface"
else
printf "DEVICE=\"$interface\"\nBOOTPROTO=\"dhcp\"\nONBOOT=\"yes\"\nTYPE=\"Ethernet\"\n" >"${SCRIPTS_PATH}ifcfg-$interface"
fi
if [ "$ipv6_init" == "True" ]; then
# Make DUID-UUID Type 4 (RFC 6355)
echo "default-duid \"\\x00\\x04$(sed 's/.\{2\}/\\x&/g' < /etc/machine-id)\";" >"/var/lib/dhclient/dhclient6--$interface.lease"
printf "IPV6INIT=\"yes\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
if [ $ipv6_AdvManagedFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateful address configuration
printf "IPV6_FORCE_ACCEPT_RA=\"yes\"\nDHCPV6C=\"yes\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
echo "DHCPv6 Stateful Configured"
elif [ $ipv6_AdvOtherConfigFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateless address configursation
printf "IPV6_AUTOCONF=\"yes\"\nDHCPV6C=\"yes\"\nDHCPV6C_OPTIONS=\"-S\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
echo "DHCPv6 Stateless Configured"
else
# IPv6 Autoconfiguration (SLAAC)
printf "IPV6_AUTOCONF=\"yes\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
echo "IPv6 SLAAC Configured"
fi
fi
fi
elif [ "$CONF_TYPE" == "suse-netscripts" ]; then
printf "BOOTPROTO=\"dhcp\"\nSTARTMODE=\"auto\"" >"${SCRIPTS_PATH}ifcfg-$interface"
fi
echo "Configured $1"
}
function config_exists() {
local interface=$1
if [[ "$CONF_TYPE" =~ "netscripts" ]]; then
if [ -f "${SCRIPTS_PATH}ifcfg-$interface" ]; then
return 0
fi
else
if ifquery $interface >/dev/null 2>&1; then
if [ -z "$(ifquery $interface 2>&1)" ]; then
return 1
else
return 0
fi
else
return 1
fi
fi
return 1
}
function inspect_interface() {
local interface=$1
local mac_addr_type
mac_addr_type=$(cat /sys/class/net/${interface}/addr_assign_type)
echo -n "Inspecting interface: $interface..."
if config_exists $interface; then
echo "Has config, skipping."
elif interface_is_vlan $interface || [ "$mac_addr_type" == "0" ]; then
local has_link
local tries=DIB_DHCP_TIMEOUT
for ((; tries > 0; tries--)); do
# Need to set the link up on each iteration
ip link set dev $interface up &>/dev/null
has_link=$(get_if_link $interface)
[ "$has_link" == "1" ] && break
sleep 1
done
if [ "$has_link" == "1" ]; then
local ipv6_init=False
local ipv6_AdvManagedFlag=No
local ipv6_AdvOtherConfigFlag=No
if type rdisc6 &>/dev/null; then
# We have rdisc6, let's try to configure IPv6 autoconfig/dhcpv6
tries=DIB_DHCP_TIMEOUT
for ((; tries > 0; tries--)); do
# Need to retry this, link-local-address required for
# Neighbor Discovery, DHCPv6 etc.
set +e # Do not exit on error, capture rdisc6 error codes.
RA=$(rdisc6 --retry 3 --single "$interface" 2>/dev/null)
local return_code=$?
set -e # Re-enable exit on error.
if [ $return_code -eq 0 ]; then
ipv6_init=True
ipv6_AdvManagedFlag=$(echo "$RA" | grep "Stateful address conf." | awk -F: '{ print $2 }')
ipv6_AdvOtherConfigFlag=$(echo "$RA" | grep "Stateful other conf." | awk -F: '{ print $2 }')
break
elif [ $return_code -eq 1 ]; then
sleep 1
elif [ $return_code -eq 2 ]; then
# If rdisc6 does not receive any response after the
# specified number of attempts waiting for wait_ms
# (1000ms by default) milliseconds each time, it will
# exit with code 2.
break
fi
done
else
echo "rdisc6 not available, skipping IPv6 configuration."
fi
enable_interface "$interface" "$ipv6_init" "$ipv6_AdvManagedFlag" "$ipv6_AdvOtherConfigFlag"
else
echo "No link detected, skipping"
fi
else
echo "Device has generated MAC, skipping."
fi
}
if [ -n "$INTERFACE" ]; then
inspect_interface $INTERFACE
else
for iface in $(ls /sys/class/net | grep -v ^lo$); do
inspect_interface $iface
done
fi
|
