#!/bin/bash
# /etc/rc.d/rc.inet1
# This script is used to bring up the various network interfaces.
#
# @(#)/etc/rc.d/rc.inet1 10.2 Sun Jul 24 12:45:56 PDT 2005 (pjv)
# Set $container variable since this is a modified version of rc.inet1 with
# changes for running in an lxc container. A check to see if this variable
# is set will be used to skip parts of the script that we don't want to run
# in a container. Thanks to Matteo Bernardini <ponce@slackbuilds.org> and
# Chris Willing for the initial work making this script lxc compatible.
container="lxc"
############################
# READ NETWORK CONFIG FILE #
############################
# Get the configuration information from /etc/rc.d/rc.inet1.conf:
. /etc/rc.d/rc.inet1.conf
###########
# LOGGING #
###########
# If possible, log events in /var/log/messages:
if [ -f /var/run/syslogd.pid ] && [ -x /usr/bin/logger ]; then
LOGGER=/usr/bin/logger
else # output to stdout/stderr:
LOGGER=/bin/cat
fi
# Handy wrapper for verbose logging
debug_log() {
if [ "$DEBUG_ETH_UP" = "yes" ]; then
echo "/etc/rc.d/rc.inet1: $*" | $LOGGER
fi
}
############################
# DETERMINE INTERFACE LIST #
############################
# Compose a list of interfaces from /etc/rc.d/rc.inet1.conf (with a maximum
# of 6 interfaces, but you can easily enlarge the interface limit
# - send me a picture of such a box :-).
# If a value for IFNAME[n] is not set, we assume it is an eth'n' interface.
# This way, the new script is compatible with older rc.inet1.conf files.
# The IFNAME array will be used to determine which interfaces to bring up/down.
MAXNICS=${MAXNICS:-6}
i=0
while [ $i -lt $MAXNICS ];
do
IFNAME[$i]=${IFNAME[$i]:=eth${i}}
i=$(($i+1))
done
debug_log "List of interfaces: '${IFNAME[*]}'"
######################
# LOOPBACK FUNCTIONS #
######################
# Function to bring up the loopback interface. If loopback is
# already up, do nothing.
lo_up() {
if [ -e /sys/class/net/lo ]; then
if ! /sbin/ip link show dev lo | grep -wq -e "state UP" -e "state UNKNOWN" ; then
echo "/etc/rc.d/rc.inet1: /sbin/ip address add 127.0.0.1/8 dev lo" | $LOGGER
/sbin/ip address add 127.0.0.1/8 dev lo
/sbin/ip link set dev lo up
echo "/etc/rc.d/rc.inet1: /sbin/ip route add 127.0.0.0/8 dev lo" | $LOGGER
/sbin/ip route add 127.0.0.0/8 dev lo
fi
fi
}
# Function to take down the loopback interface:
lo_down() {
if [ -e /sys/class/net/lo ]; then
echo "/etc/rc.d/rc.inet1: /sbin/ip link set dev lo down" | $LOGGER
/sbin/ip link set dev lo down
fi
}
#######################
# INTERFACE FUNCTIONS #
#######################
# Function to create virtual interfaces
virtif_create() {
# argument is 'i' - the position of this interface in the VIRTIFNAME array.
# this loop goes from i=0 to i=number_of_configured_virtual_interfaces_minus_one
# which means it doesn't do anything if there are none.
for i in $(seq 0 $((${#VIRTIFNAME[@]} - 1))); do
/sbin/ip tuntap add dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]} user ${VIRTIFUSER[$i]} group ${VIRTIFGROUP[$i]}
done
}
# Function to destory virtual interfaces
virtif_destroy() {
# argument is 'i' - the position of this interface in the VIRTIFNAME array.
for i in $(seq 0 $((${#VIRTIFNAME[@]} - 1))); do
/sbin/ip tuntap del dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]}
done
}
# Function to assemble a bridge interface.
br_open() {
# argument is 'i' - the position of this interface in the IFNAME array.
/sbin/ip link add name ${IFNAME[$1]} type bridge
for BRIF in ${BRNICS[$1]}; do
/sbin/ip link set dev $BRIF down
/sbin/ip address add 0.0.0.0 dev $BRIF
/sbin/ip link set dev $BRIF master ${IFNAME[$1]}
/sbin/ip link set dev $BRIF up
done
/sbin/ip link set dev ${IFNAME[$1]} up
}
# Function to disassemble a bridge interface.
br_close() {
/sbin/ip link set dev ${IFNAME[$1]} down
# argument is 'i' - the position of this interface in the IFNAME array.
#for BRIF in ${BRNICS[$1]}; do
for BRIF in $(ls --indicator-style=none /sys/class/net/${IFNAME[$1]}/brif/)
do
/sbin/ip link set dev $BRIF nomaster
done
/sbin/ip link set dev ${IFNAME[$1]} down
/sbin/ip link del ${IFNAME[$1]}
}
# Function to bring up a network interface. If the interface is
# already up or does not yet exist (perhaps because the kernel driver
# is not loaded yet), do nothing.
if_up() {
# Determine position 'i' of this interface in the IFNAME array:
i=0
while [ $i -lt $MAXNICS ]; do
[ "${IFNAME[$i]}" = "${1}" ] && break
i=$(($i+1))
done
# If "i" is greater or equal to "MAXNICS" at this point, it means we didn't
# find an entry in IFNAME array corresponding to "$1", which likely means
# there are more interfaces configured than MAXNICS. Let's err on the
# side of caution and do nothing instead of possibly doing the wrong thing.
if [ $i -ge $MAXNICS ]; then
echo "/etc/rc.d/rc.inet1: skipping ${1}, you might need to increase MAXNICS" | $LOGGER
return
fi
if [ -z "$container" ]; then
# If the interface is a bridge, then create it first:
[ -n "${BRNICS[$i]}" ] && br_open $i
# If the interface isn't in the kernel yet (but there's an alias for it in
# modules.conf), then it should be loaded first:
if [ -z "${IPADDR[$i]}" ] && [ "${USE_DHCP[$i]}" != "yes" ]; then # skip unconfigured interfaces
debug_log "skipping ${1} early, interface is not configured in /etc/rc.d/rc.inet1.conf"
return 0
fi
if [ ! -e /sys/class/net/${1%%:*} ]; then # no interface yet
if /sbin/modprobe -c | grep -v "^#" | grep -w "alias ${1}" | grep -vw "alias ${1} off" > /dev/null ; then
echo "/etc/rc.d/rc.inet1: /sbin/modprobe ${1}" | $LOGGER
/sbin/modprobe ${1}
fi
fi
fi # end check container
if [ -e /sys/class/net/${1%%:*} ]; then # interface exists
if ! /sbin/ip address show dev ${1} 2>/dev/null | grep -wq inet || \
! /sbin/ip link show dev ${1} | grep -wq "state UP" ; then # interface not up or not configured
if [ -n "${HWADDR[$i]}" ]; then # Set hardware address _before_ the interface goes up:
echo "/etc/rc.d/rc.inet1: /sbin/ip link set dev ${1} address ${HWADDR[$i]}" | $LOGGER
/sbin/ip link set dev ${1} address ${HWADDR[$i]}
fi
if [ -n "${MTU[$i]}" ]; then # Set MTU to something else than 1500
echo "/etc/rc.d/rc.inet1: /sbin/ip link set dev ${1} mtu ${MTU[$i]}" | $LOGGER
/sbin/ip link set dev ${1} mtu ${MTU[$i]}
fi
if /sbin/ip link show dev ${1} | grep -wq "state DOWN" ; then
/sbin/ip link set dev ${1} up # Bring up interface
fi
if [ -x /etc/rc.d/rc.wireless ]; then
. /etc/rc.d/rc.wireless ${1} start # Initialize any wireless parameters
fi
if [ "${USE_DHCP[$i]}" = "yes" ]; then # use DHCP to bring interface up
# Clear DHCP_OPTIONS before adding new options to it:
unset DHCP_OPTIONS
# Set DHCP_OPTIONS for this interface:
[ -n "${DHCP_HOSTNAME[$i]}" ] && DHCP_OPTIONS="-h ${DHCP_HOSTNAME[$i]}"
[ "${DHCP_KEEPRESOLV[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -C resolv.conf"
[ "${DHCP_KEEPNTP[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -C ntp.conf"
[ "${DHCP_KEEPGW[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -G"
[ "${DHCP_DEBUG[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -d"
[ "${DHCP_NOIPV4LL[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -L"
[ -n "${DHCP_IPADDR[$i]}" ] && DHCP_OPTIONS="$DHCP_OPTIONS -r ${DHCP_IPADDR[$i]}"
echo "Polling for DHCP server on interface ${1}:"
# If you set a timeout, you get one, even if the kernel doesn't think that
# your device is connected, in case /sys isn't right (which it usually isn't
# except right after the device is loaded, when it usually is):
#### (start commented out)
# This is deactivated for now since the kernel has been returning incorrect
# results concerning whether the interface carrier is detected.
#if [ -z "${DHCP_TIMEOUT[$i]}" ]; then
# /sbin/ip link set dev ${1} up && sleep 1
# CONNSTATUS="$(cat /sys/class/net/${1}/carrier 2> /dev/null)"
# /sbin/ip link set dev ${1} down
# if [ "$CONNSTATUS" = "0" ]; then
# # The kernel has just told us the cable isn't even plugged in, but we will
# # give any DHCP server a short chance to reply anyway:
# echo "No carrier detected on ${1}. Reducing DHCP timeout to 15 seconds."
# DHCP_TIMEOUT[$i]=15
# fi
#fi
#### (end commented out)
# 15 seconds should be a reasonable default DHCP timeout. 30 was too much.
echo "/etc/rc.d/rc.inet1: /sbin/dhcpcd -L -t ${DHCP_TIMEOUT[$i]:-15} ${DHCP_OPTIONS} ${1}" | $LOGGER
/sbin/dhcpcd -L -t ${DHCP_TIMEOUT[$i]:-15} ${DHCP_OPTIONS} ${1}
if [ "$?" == "0" ]; then # the dhcp call has succeeded
if [ -n "${IPALIASES[$i]}" ]; then
# Add extra IP addresses, if defined, to interface
num=0
for ipalias in ${IPALIASES[$i]}; do
ip="${ipalias%/*}"
nm="${ipalias#*/}"
[ -z "$nm" ] || [ "$ip" == "$nm" ] && nm="32"
/sbin/ip address add ${ip}/${nm} dev ${1} label ${1}:${num}
num=$(($num + 1))
done
fi
if [ "${PROMISCUOUS[$i]}" = "yes" ]; then
# Set promiscuous mode on the interface
/sbin/ip link set dev ${1} promisc on
fi
fi
else # bring up interface using a static IP address
if [ -n "${IPADDR[$i]}" ]; then # skip unconfigured interfaces
# Set up the network card:
echo "/etc/rc.d/rc.inet1: /sbin/ip address add ${IPADDR[$i]}/${NETMASK[$i]} broadcast + dev ${1}" | $LOGGER
/sbin/ip address add ${IPADDR[$i]}/${NETMASK[$i]} broadcast + dev ${1}
if /sbin/ip link show dev ${1} | grep -wq "state DOWN" ; then
/sbin/ip link set dev ${1} up # Bring up interface
fi
# Add extra IP addresses, if defined, to interface
if [ -n "${IPALIASES[$i]}" ]; then
num=0
for ipalias in ${IPALIASES[$i]}; do
ip="${ipalias%/*}"
nm="${ipalias#*/}"
[ -z "$nm" ] || [ "$ip" == "$nm" ] && nm="32"
/sbin/ip address add ${ip}/${nm} dev ${1} label ${1}:${num}
num=$(($num + 1))
done
fi
if [ "${PROMISCUOUS[$i]}" = "yes" ]; then
# Set promiscuous mode on the interface
/sbin/ip link set dev ${1} promisc on
fi
else
debug_log "${1} interface is not configured in /etc/rc.d/rc.inet1.conf"
fi
fi
else
debug_log "${1} is already up, skipping"
fi
else
debug_log "${1} interface does not exist (yet)"
fi
}
# Function to take down a network interface:
if_down() {
# Determine position 'i' of this interface in the IFNAME array:
i=0
while [ $i -lt $MAXNICS ]; do
[ "${IFNAME[$i]}" = "${1}" ] && break
i=$(($i+1))
done
if [ $i -ge $MAXNICS ]; then
echo "/etc/rc.d/rc.inet1: skipping ${1}, you might need to increase MAXNICS" | $LOGGER
return
fi
if [ -e /sys/class/net/${1%%:*} ]; then
if [ "${USE_DHCP[$i]}" = "yes" ]; then
echo "/etc/rc.d/rc.inet1: /sbin/dhcpcd -k -d ${1}" | $LOGGER
/sbin/dhcpcd -k -d ${1} 2> /dev/null || /sbin/ip link set dev ${1} down
sleep 1
else
echo "/etc/rc.d/rc.inet1: /sbin/ip link set dev ${1} down" | $LOGGER
/sbin/ip link set dev ${1} down
fi
if [ -x /etc/rc.d/rc.wireless ]; then
. /etc/rc.d/rc.wireless ${1} stop # Kill wireless daemons if any.
fi
# If the interface is a bridge, then destroy it now:
if [ -n "${BRNICS[$i]}" ]; then
br_close $i
fi
# Flush the address from the interface:
ip address flush dev ${1}
fi
}
#####################
# GATEWAY FUNCTIONS #
#####################
# Function to bring up the gateway if there is not yet a default route:
gateway_up() {
if ! /sbin/ip route show | grep -wq default ; then
if [ -n "$GATEWAY" ]; then
echo "/etc/rc.d/rc.inet1: /sbin/ip route add default via ${GATEWAY}" | $LOGGER
/sbin/ip route add default via ${GATEWAY} | $LOGGER
fi
fi
}
# Function to take down an existing default gateway:
gateway_down() {
if /sbin/ip route show | grep -wq default ; then
echo "/etc/rc.d/rc.inet1: /sbin/ip route del default" | $LOGGER
/sbin/ip route del default
fi
}
# Function to start the network:
start() {
lo_up
virtif_create
for i in "${IFNAME[@]}" ; do
if_up $i
done
gateway_up
}
# Function to stop the network:
stop() {
gateway_down
for i in "${IFNAME[@]}" ; do
if_down $i
done
virtif_destroy
lo_down
}
############
### MAIN ###
############
case "$1" in
start|up) # "start" (or "up") brings up all configured interfaces:
start
;;
stop|down) # "stop" (or "down") takes down all configured interfaces:
stop
;;
restart) # "restart" restarts the network:
stop
start
;;
lo_start|lo_up) # Start the loopback interface:
lo_up
;;
lo_stop|lo_down) # Stop the loopback interface:
lo_down
;;
*_start|*_up) # Example: "eth1_start" (or "eth1_up") will start the specified interface 'eth1'
INTERFACE=$(echo $1 | /bin/cut -d '_' -f 1)
if_up $INTERFACE
gateway_up
;;
*_stop|*_down) # Example: "eth0_stop" (or "eth0_down") will stop the specified interface 'eth0'
INTERFACE=$(echo $1 | /bin/cut -d '_' -f 1)
if_down $INTERFACE
;;
*_restart) # Example: "wlan0_restart" will take 'wlan0' down and up again
INTERFACE=$(echo $1 | /bin/cut -d '_' -f 1)
if_down $INTERFACE
sleep 1
if_up $INTERFACE
gateway_up
;;
*) # The default is to bring up all configured interfaces:
start
esac
# End of /etc/rc.d/rc.inet1
