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331 lines
11 KiB
331 lines
11 KiB
#! /bin/sh
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# /etc/rc.d/rc.inet1
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# This script is used to bring up the various network interfaces.
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#
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# @(#)/etc/rc.d/rc.inet1 10.2 Sun Jul 24 12:45:56 PDT 2005 (pjv)
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# Set $container variable since this is a modified version of rc.inet1 with
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# changes for running in an lxc container. A check to see if this variable
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# is set will be used to skip parts of the script that we don't want to run
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# in a container. Thanks to Matteo Bernardini <ponce@slackbuilds.org> and
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# Chris Willing for the initial work making this script lxc compatible.
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container="lxc"
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############################
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# READ NETWORK CONFIG FILE #
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############################
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# Get the configuration information from /etc/rc.d/rc.inet1.conf:
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. /etc/rc.d/rc.inet1.conf
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###########
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# LOGGING #
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###########
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# If possible, log events in /var/log/messages:
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if [ -f /var/run/syslogd.pid -a -x /usr/bin/logger ]; then
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LOGGER=/usr/bin/logger
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else # output to stdout/stderr:
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LOGGER=/bin/cat
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fi
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############################
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# DETERMINE INTERFACE LIST #
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############################
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# Compose a list of interfaces from /etc/rc.d/rc.inet1.conf (with a maximum
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# of 6 interfaces, but you can easily enlarge the interface limit
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# - send me a picture of such a box :-).
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# If a value for IFNAME[n] is not set, we assume it is an eth'n' interface.
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# This way, the new script is compatible with older rc.inet1.conf files.
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# The IFNAME array will be used to determine which interfaces to bring up/down.
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MAXNICS=${MAXNICS:-6}
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i=0
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while [ $i -lt $MAXNICS ];
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do
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IFNAME[$i]=${IFNAME[$i]:=eth${i}}
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i=$(($i+1))
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done
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if [ "$DEBUG_ETH_UP" = "yes" ]; then
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echo "/etc/rc.d/rc.inet1: List of interfaces: '${IFNAME[@]}'" | $LOGGER
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fi
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######################
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# LOOPBACK FUNCTIONS #
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######################
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# Function to bring up the loopback interface. If loopback is
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# already up, do nothing.
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lo_up() {
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if grep lo: /proc/net/dev 1> /dev/null ; then
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if ! /sbin/ifconfig | grep "^lo" 1> /dev/null ; then
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echo "/etc/rc.d/rc.inet1: /sbin/ifconfig lo 127.0.0.1" | $LOGGER
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/sbin/ifconfig lo 127.0.0.1
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echo "/etc/rc.d/rc.inet1: /sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo" | $LOGGER
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/sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo
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fi
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fi
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}
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# Function to take down the loopback interface:
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lo_down() {
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if grep lo: /proc/net/dev 1> /dev/null ; then
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echo "/etc/rc.d/rc.inet1: /sbin/ifconfig lo down" | $LOGGER
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/sbin/ifconfig lo down
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fi
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}
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#######################
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# INTERFACE FUNCTIONS #
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#######################
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# Function to assemble a bridge interface.
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br_open() {
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# argument is 'i' - the position of this interface in the IFNAME array.
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/sbin/brctl addbr ${IFNAME[$1]}
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for BRIF in $(echo ${BRNICS[$1]}); do
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/sbin/ifconfig $BRIF down
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/sbin/ifconfig $BRIF 0.0.0.0 promisc up
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/sbin/brctl addif ${IFNAME[$1]} $BRIF
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done
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}
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# Function to disassemble a bridge interface.
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br_close() {
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# argument is 'i' - the position of this interface in the IFNAME array.
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#for BRIF in $(echo ${BRNICS[$1]}); do
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for BRIF in $(ls --indicator-style=none /sys/class/net/${IFNAME[$1]}/brif/)
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do
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/sbin/brctl delif ${IFNAME[$1]} $BRIF
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done
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/sbin/ifconfig ${IFNAME[$1]} down
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/sbin/brctl delbr ${IFNAME[$1]}
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}
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# Function to bring up a network interface. If the interface is
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# already up or does not yet exist (perhaps because the kernel driver
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# is not loaded yet), do nothing.
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if_up() {
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# Determine position 'i' of this interface in the IFNAME array:
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i=0
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while [ $i -lt $MAXNICS ]; do
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[ "${IFNAME[$i]}" = "${1}" ] && break
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i=$(($i+1))
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done
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if [ -z "$container" ]; then
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# If the interface is a bridge, then create it first:
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[ -n "${BRNICS[$i]}" ] && br_open $i
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# If the interface isn't in the kernel yet (but there's an alias for it in
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# modules.conf), then it should be loaded first:
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if ! grep `echo ${1}: | cut -f 1 -d :`: /proc/net/dev 1> /dev/null ; then # no interface yet
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if /sbin/modprobe -c | grep -v "^#" | grep -w "alias ${1}" | grep -vw "alias ${1} off" > /dev/null ; then
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echo "/etc/rc.d/rc.inet1: /sbin/modprobe ${1}" | $LOGGER
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/sbin/modprobe ${1}
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fi
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fi
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fi # end check container
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if grep `echo ${1}: | cut -f 1 -d :`: /proc/net/dev 1> /dev/null ; then # interface exists
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if ! /sbin/ifconfig | grep -w "${1}" 1>/dev/null || \
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! /sbin/ifconfig ${1} | grep -w inet 1> /dev/null ; then # interface not up or not configured
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if [ ! "${HWADDR[$i]}" = "" ]; then # Set hardware address _before_ the interface goes up:
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echo "/etc/rc.d/rc.inet1: /sbin/ifconfig ${1} hw ether ${HWADDR[$i]}" | $LOGGER
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/sbin/ifconfig ${1} hw ether ${HWADDR[$i]}
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fi
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if [ ! "${MTU[$i]}" = "" ]; then # Set MTU to something else than 1500
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echo "/etc/rc.d/rc.inet1: /sbin/ifconfig ${1} mtu ${MTU[$i]}" | $LOGGER
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/sbin/ifconfig ${1} mtu ${MTU[$i]}
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fi
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if [ -x /etc/rc.d/rc.wireless ]; then
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. /etc/rc.d/rc.wireless ${1} start # Initialize any wireless parameters
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fi
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if [ "${USE_DHCP[$i]}" = "yes" ]; then # use DHCP to bring interface up
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# Clear DHCP_OPTIONS before adding new options to it:
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unset DHCP_OPTIONS
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# Set DHCP_OPTIONS for this interface:
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[ ${DHCP_HOSTNAME[$i]} ] && DHCP_OPTIONS="-h ${DHCP_HOSTNAME[$i]}"
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[ "${DHCP_KEEPRESOLV[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -C resolv.conf"
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[ "${DHCP_KEEPNTP[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -C ntp.conf"
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[ "${DHCP_KEEPGW[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -G"
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[ "${DHCP_DEBUG[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -d"
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[ "${DHCP_NOIPV4LL[$i]}" = "yes" ] && DHCP_OPTIONS="$DHCP_OPTIONS -L"
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[ ${DHCP_IPADDR[$i]} ] && DHCP_OPTIONS="$DHCP_OPTIONS -r ${DHCP_IPADDR[$i]}"
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echo "Polling for DHCP server on interface ${1}:"
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# If you set a timeout, you get one, even if the kernel doesn't think that
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# your device is connected, in case /sys isn't right (which it usually isn't
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# except right after the device is loaded, when it usually is):
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#### (start commented out)
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# This is deactivated for now since the kernel has been returning incorrect
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# results concerning whether the interface carrier is detected.
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#if [ "${DHCP_TIMEOUT[$i]}" = "" ]; then
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# ifconfig ${1} up && sleep 1
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# CONNSTATUS="$(cat /sys/class/net/${1}/carrier 2> /dev/null)"
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# ifconfig ${1} down
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# if [ "$CONNSTATUS" = "0" ]; then
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# # The kernel has just told us the cable isn't even plugged in, but we will
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# # give any DHCP server a short chance to reply anyway:
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# echo "No carrier detected on ${1}. Reducing DHCP timeout to 10 seconds."
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# DHCP_TIMEOUT[$i]=10
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# fi
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#fi
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#### (end commented out)
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# 10 seconds should be a reasonable default DHCP timeout. 30 was too much.
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echo "/etc/rc.d/rc.inet1: /sbin/dhcpcd -t ${DHCP_TIMEOUT[$i]:-10} ${DHCP_OPTIONS} ${1}" | $LOGGER
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/sbin/dhcpcd -t ${DHCP_TIMEOUT[$i]:-10} ${DHCP_OPTIONS} ${1}
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else # bring up interface using a static IP address
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if [ ! "${IPADDR[$i]}" = "" ]; then # skip unconfigured interfaces
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# Determine broadcast address from the IP address and netmask:
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BROADCAST[$i]=`/bin/ipmask ${NETMASK[$i]} ${IPADDR[$i]}|cut -f1 -d' '`
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# Set up the network card:
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echo "/etc/rc.d/rc.inet1: /sbin/ifconfig ${1} ${IPADDR[$i]} broadcast ${BROADCAST[$i]} netmask ${NETMASK[$i]}" | $LOGGER
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/sbin/ifconfig ${1} ${IPADDR[$i]} broadcast ${BROADCAST[$i]} netmask ${NETMASK[$i]}
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else
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if [ "$DEBUG_ETH_UP" = "yes" ]; then
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echo "/etc/rc.d/rc.inet1: ${1} interface is not configured in /etc/rc.d/rc.inet1.conf" | $LOGGER
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fi
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fi
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fi
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else
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if [ "$DEBUG_ETH_UP" = "yes" ]; then
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echo "/etc/rc.d/rc.inet1: ${1} is already up, skipping" | $LOGGER
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fi
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fi
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else
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if [ "$DEBUG_ETH_UP" = "yes" ]; then
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echo "/etc/rc.d/rc.inet1: ${1} interface does not exist (yet)" | $LOGGER
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fi
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fi
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}
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# Function to take down a network interface:
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if_down() {
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# Determine position 'i' of this interface in the IFNAME array:
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i=0
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while [ $i -lt $MAXNICS ]; do
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[ "${IFNAME[$i]}" = "${1}" ] && break
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i=$(($i+1))
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done
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if grep `echo ${1}: | cut -f 1 -d :`: /proc/net/dev 1> /dev/null ; then
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if [ "${USE_DHCP[$i]}" = "yes" ]; then
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echo "/etc/rc.d/rc.inet1: /sbin/dhcpcd -k -d ${1}" | $LOGGER
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/sbin/dhcpcd -k -d ${1} 2> /dev/null || /sbin/ifconfig ${1} down
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sleep 1
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else
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echo "/etc/rc.d/rc.inet1: /sbin/ifconfig ${1} down" | $LOGGER
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/sbin/ifconfig ${1} down
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fi
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if [ -x /etc/rc.d/rc.wireless ]; then
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. /etc/rc.d/rc.wireless ${1} stop # Kill wireless daemons if any.
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fi
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# If the interface is a bridge, then destroy it now:
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if [ -n "${BRNICS[$i]}" ]; then
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br_close $i
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fi
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fi
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}
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#####################
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# GATEWAY FUNCTIONS #
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#####################
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# Function to bring up the gateway if there is not yet a default route:
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gateway_up() {
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if ! /sbin/route -n | grep "^0.0.0.0" 1> /dev/null ; then
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if [ ! "$GATEWAY" = "" ]; then
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echo "/etc/rc.d/rc.inet1: /sbin/route add default gw ${GATEWAY} metric 1" | $LOGGER
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/sbin/route add default gw ${GATEWAY} metric 1 2>&1 | $LOGGER
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fi
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fi
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}
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# Function to take down an existing default gateway:
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gateway_down() {
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if /sbin/route -n | grep "^0.0.0.0" 1> /dev/null ; then
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echo "/etc/rc.d/rc.inet1: /sbin/route del default" | $LOGGER
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/sbin/route del default
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fi
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}
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# Function to start the network:
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start() {
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lo_up
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for i in ${IFNAME[@]} ; do
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if_up $i
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done
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gateway_up
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}
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# Function to stop the network:
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stop() {
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gateway_down
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for i in ${IFNAME[@]} ; do
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if_down $i
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done
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lo_down
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}
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############
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### MAIN ###
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############
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case "$1" in
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'start') # "start" brings up all configured interfaces:
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start
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;;
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'stop') # "stop" takes down all configured interfaces:
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stop
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;;
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'restart') # "restart" restarts the network:
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stop
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start
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;;
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'lo_start') # Start the loopback interface:
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lo_up
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;;
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*_start) # Example: "eth1_start" will start the specified interface 'eth1'
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INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
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if_up $INTERFACE
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gateway_up
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;;
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'lo_stop') # Stop the loopback interface:
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lo_down
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;;
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*_stop) # Example: "eth0_stop" will stop the specified interface 'eth0'
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INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
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if_down $INTERFACE
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;;
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*_restart) # Example: "wlan0_restart" will take 'wlan0' down and up again
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INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
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if_down $INTERFACE
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sleep 1
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if_up $INTERFACE
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gateway_up
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;;
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'up') # "up" does the same thing as "start"
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start
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;;
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'down') # "down" does the same thing as "stop"
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stop
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;;
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'lo_up') # Start the loopback interface:
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lo_up
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;;
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*_up) # "*_up" does the same thing as "*_start"
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INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
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if_up $INTERFACE
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gateway_up
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;;
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'lo_down') # Stop the loopback interface:
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lo_down
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;;
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*_down) # "*_down" does the same thing as "*_stop"
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INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
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if_down $INTERFACE
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;;
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*) # The default is to bring up all configured interfaces:
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start
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esac
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# End of /etc/rc.d/rc.inet1
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