#! /bin/sh
# /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)
#
# Modified by Michiel Broek to add IPv6 support and to migrate to
# use the iproute2 utilities.

############################
# 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 -a -x /usr/bin/logger ]; then
  LOGGER=/usr/bin/logger
else # output to stdout/stderr:
  LOGGER=/bin/cat
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
IP6=0
while [ $i -lt $MAXNICS ];
do
  IFNAME[$i]=${IFNAME[$i]:=eth${i}}
  if [ -n "${IP6ADDR[$i]}" -o "${USE_DHCP6[0]}" = "yes" ]; then
    IP6=1
  fi
  i=$(($i+1))
done
if [ "$DEBUG_ETH_UP" = "yes" ]; then
  echo "/etc/rc.d/rc.inet1:  List of interfaces: '${IFNAME[@]}'" | $LOGGER
fi

# if we need ipv6 and it isn't available yet, load it now.
if [ $IP6 = 1 -a ! -e /proc/net/if_inet6 ]; then
  echo "/etc/rc.d/rc.inet1:  /sbin/modprobe ipv6" | $LOGGER
  /sbin/modprobe ipv6
fi

######################
# LOOPBACK FUNCTIONS #
######################

# Function to bring up the loopback interface.  If loopback is
# already up, do nothing.
lo_up() {
  if grep lo: /proc/net/dev 1> /dev/null ; then
    if ! /sbin/ip addr show lo | grep "inet " 1> /dev/null ; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip addr add 127.0.0.1/8 dev lo" | $LOGGER
      /sbin/ip addr add 127.0.0.1/8 dev lo
      echo "/etc/rc.d/rc.inet1:  /sbin/ip link set lo up" | $LOGGER
      /sbin/ip link set lo up
      echo "/etc/rc.d/rc.inet1:  /sbin/ip route add 127.0.0.0/8 via 127.0.0.1 dev lo scope link" | $LOGGER
      /sbin/ip route add 127.0.0.0/8 via 127.0.0.1 dev lo scope link
    fi
  fi
}

# Function to take down the loopback interface:
lo_down() {
  if grep lo: /proc/net/dev 1> /dev/null ; then
    echo "/etc/rc.d/rc.inet1:  /sbin/ip link set lo down" | $LOGGER
    /sbin/ip link set lo down
    echo "/etc/rc.d/rc.inet1:  /sbin/ip addr flush dev lo" | $LOGGER
    /sbin/ip addr flush dev lo
  fi
}

#######################
# INTERFACE FUNCTIONS #
#######################

# Function to assemble a bridge interface.
br_open() {
  # argument is 'i' - the position of this interface in the IFNAME array.
  echo "/etc/rc.d/rc.inet1:  /sbin/ip link add ${IFNAME[$1]} type bridge" | $LOGGER
  /sbin/ip link add ${IFNAME[$1]} type bridge
  ## Should be 0 for a dhcp client
  if [ "${BRIDGE_FORWARDDELAY[$i]}" ]; then
    echo "/etc/rc.d/rc.inet1:  /sbin/brctl setfd ${IFNAME[$1]} ${BRIDGE_FORWARDDELAY[$i]}" | $LOGGER
    /sbin/brctl setfd ${IFNAME[$1]} ${BRIDGE_FORWARDDELAY[$i]}
  fi
  for BRIF in $(echo ${BRNICS[$1]}); do
    echo "/etc/rc.d/rc.inet1:    /sbin/ip link set $BRIF down" | $LOGGER
    /sbin/ip link set $BRIF down
    echo "/etc/rc.d/rc.inet1:    /sbin/ip addr flush dev $BRIF" | $LOGGER
    /sbin/ip addr flush dev $BRIF
    echo "/etc/rc.d/rc.inet1:    /sbin/ip addr add 0.0.0.0 dev $BRIF" | $LOGGER
    /sbin/ip addr add 0.0.0.0 dev $BRIF
    echo "/etc/rc.d/rc.inet1:    /sbin/ip link set $BRIF promisc on master ${IFNAME[$1]} up" | $LOGGER
    /sbin/ip link set $BRIF promisc on master ${IFNAME[$1]} up
  done
}

# Function to disassemble a bridge interface.
br_close() {
  # argument is 'i' - the position of this interface in the IFNAME array.
  #for BRIF in $(echo ${BRNICS[$1]}); do
  for BRIF in $(ls --indicator-style=none /sys/class/net/${IFNAME[$1]}/brif/)
  do
    echo "/etc/rc.d/rc.inet1:    /sbin/ip link set dev $BRIF nomaster" | $LOGGER
    /sbin/ip link set dev $BRIF nomaster
  done
  echo "/etc/rc.d/rc.inet1:    /sbin/ip link set ${IFNAME[$1]} down" | $LOGGER
  /sbin/ip link set ${IFNAME[$1]} down
  echo "/etc/rc.d/rc.inet1:    /sbin/ip addr flush dev ${IFNAME[$1]}" | $LOGGER
  /sbin/ip addr flush dev ${IFNAME[$1]}
  echo "/etc/rc.d/rc.inet1:  /sbin/ip link del ${IFNAME[$1]} type bridge" | $LOGGER
  /sbin/ip link del ${IFNAME[$1]} type bridge
}

# 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 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 ! grep `echo ${1}: | cut -f 1 -d :`: /proc/net/dev 1> /dev/null ; 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
  if grep `echo ${1}: | cut -f 1 -d :`: /proc/net/dev 1> /dev/null ; then # interface exists
    # Don't listen to IPv6 RA if we don't need it and turn off ipv6.
    if [ -d "/proc/sys/net/ipv6" ]; then
      sysctl -q -w "net.ipv6.conf.${1}.accept_ra=0"
      sysctl -q -w "net.ipv6.conf.${1}.disable_ipv6=1"
    fi
    if ! grep ${1}: /proc/net/dev 1> /dev/null || \
      ! /sbin/ip addr show ${1} up | grep "inet " 1> /dev/null ; then # interface not up or not configured
      if [ ! "${HWADDR[$i]}" = "" ]; then # Set hardware address _before_ the interface goes up:
        echo "/etc/rc.d/rc.inet1:  /sbin/ip link set ${1} address  ${HWADDR[$i]}" | $LOGGER
        /sbin/ip link set ${1} address  ${HWADDR[$i]}
      fi
      if [ ! "${MTU[$i]}" = "" ]; then # Set MTU to something else than 1500
        echo "/etc/rc.d/rc.inet1:  /sbin/ip link set ${1} mtu ${MTU[$i]}" | $LOGGER
	/sbin/ip link set ${1} mtu ${MTU[$i]}
      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:
        [ ${DHCP_HOSTNAME[$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"
        [ ${DHCP_IPADDR[$i]} ] && DHCP_OPTIONS="$DHCP_OPTIONS -r ${DHCP_IPADDR[$i]}"
        echo "Polling for DHCP server on interface ${1}:"
        # If you set a timeout, you get one, even if the kernel doesn't think that
        # your device is connected, in case /sys isn't right (which it usually isn't
        # except right after the device is loaded, when it usually is):
        #### (start commented out)
        # This is deactivated for now since the kernel has been returning incorrect
        # results concerning whether the interface carrier is detected.
        #if [ "${DHCP_TIMEOUT[$i]}" = "" ]; then
        #  ifconfig ${1} up && sleep 1
        #  CONNSTATUS="$(cat /sys/class/net/${1}/carrier 2> /dev/null)"
        #  ifconfig ${1} down
        #  if [ "$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 ${1}.  Reducing DHCP timeout to 10 seconds."
        #    DHCP_TIMEOUT[$i]=10
        #  fi
        #fi
        #### (end commented out)
        # 10 seconds should be a reasonable default DHCP timeout.  30 was too much.
        echo "/etc/rc.d/rc.inet1:  /sbin/dhcpcd -t ${DHCP_TIMEOUT[$i]:-10} ${DHCP_OPTIONS} ${1}" | $LOGGER
        /sbin/dhcpcd -t ${DHCP_TIMEOUT[$i]:-10} ${DHCP_OPTIONS} ${1}
	if [ "${USE_DHCP6[$i]}" = "yes" -a -x /sbin/dhclient ]; then # use DHCPv6 to bring interface up
	  # Turn ipv6 and RA on for this interface
	  sysctl -q -w "net.ipv6.conf.${1}.disable_ipv6=0"
	  sysctl -q -w "net.ipv6.conf.${1}.accept_ra=1"
	  echo "/etc/rc.d/rc.inet1:  /sbin/dhclient -6 -e TIMEOUT=${DHCP_TIMEOUT[$i]:-10} ${1}" | $LOGGER
	  echo "/etc/rc.d/rc.inet1:  /sbin/dhclient -6 -e TIMEOUT=${DHCP_TIMEOUT[$i]:-10} ${1}"
	  /sbin/dhclient -6 -e TIMEOUT=${DHCP_TIMEOUT[$i]:-10} ${1}
	else
	  # Dynamic IPv4 interface but no DHCPv6, allow IPv6 autoconfigure.
          if [ -d "/proc/sys/net/ipv6" ]; then
            sysctl -q -w "net.ipv6.conf.${1}.accept_ra=1"
            sysctl -q -w "net.ipv6.conf.${1}.disable_ipv6=0"
          fi
	fi
      else # bring up interface using a static IP address
        if [ ! "${IPADDR[$i]}" = "" ]; then # skip unconfigured interfaces
          # Set up the network card:
	  echo "/etc/rc.d/rc.inet1:  /sbin/ip addr add ${IPADDR[$i]}/${NETMASK[$i]} brd + dev ${1}" | $LOGGER
	  /sbin/ip addr add ${IPADDR[$i]}/${NETMASK[$i]} brd + dev ${1}
	  echo "/etc/rc.d/rc.inet1:  /sbin/ip link set ${1} up" | $LOGGER
	  /sbin/ip link set ${1} up
	  # IPv6 Scope:global address
	  if [ ! "${IP6ADDR[$i]}" = "" ]; then
	    # Turn ipv6 on for this interface
	    sysctl -q -w "net.ipv6.conf.${1}.disable_ipv6=0"
	    # Add one or more IPv6 addresses.
	    for addr in ${IP6ADDR[$i]}; do
	      echo "/etc/rc.d/rc.inet1:  /sbin/ip addr add ${addr} dev ${1}" | $LOGGER
	      /sbin/ip addr add ${addr} dev ${1}
	    done
	  fi
        else
          if [ "$DEBUG_ETH_UP" = "yes" ]; then
            echo "/etc/rc.d/rc.inet1:  ${1} interface is not configured in /etc/rc.d/rc.inet1.conf" | $LOGGER
          fi
        fi
      fi
    else
      if [ "$DEBUG_ETH_UP" = "yes" ]; then
        echo "/etc/rc.d/rc.inet1:  ${1} is already up, skipping" | $LOGGER
      fi
    fi 
  else
    if [ "$DEBUG_ETH_UP" = "yes" ]; then
      echo "/etc/rc.d/rc.inet1:  ${1} interface does not exist (yet)" | $LOGGER
    fi
  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 grep `echo ${1}: | cut -f 1 -d :`: /proc/net/dev 1> /dev/null ; then
    if [ "${USE_DHCP[$i]}" = "yes" ]; then
      if [ "${USE_DHCP6[$i]}" = "yes" -a -e /var/run/dhclient6.pid ]; then
	echo "/etc/rc.d/rc.inet1:  /sbin/dhclient -6 -r ${1}" | $LOGGER
	/sbin/dhclient -6 -r ${1}
      fi
      echo "/etc/rc.d/rc.inet1:  /sbin/dhcpcd -k -d ${1}" | $LOGGER
      /sbin/dhcpcd -k -d ${1} 2> /dev/null
      sleep 1
    fi
    # Shutdown interface, else a restart doesn't work.
    echo "/etc/rc.d/rc.inet1:  /sbin/ip link set ${1} down" | $LOGGER
    /sbin/ip link set ${1} down
    echo "/etc/rc.d/rc.inet1:  /sbin/ip addr flush dev ${1}" | $LOGGER
    /sbin/ip addr flush dev ${1}
    if [ -x /etc/rc.d/rc.wireless ]; then
      . /etc/rc.d/rc.wireless ${1} stop # Kill wireless daemons if any.
    fi
    # If the interface is a bridge, then destroy it now:
    [ -n "${BRNICS[$i]}" ] && br_close $i
  fi
}

#####################
# GATEWAY FUNCTIONS #
#####################

# Function to bring up the gateway if there is not yet a default route:
gateway_up() {
  if ! /sbin/ip -4 route show | grep "^default" 1> /dev/null ; then
    if [ ! "$GATEWAY" = "" ]; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip route add 0.0.0.0/0 via ${GATEWAY} metric 1" | $LOGGER
      /sbin/ip route add 0.0.0.0/0 via ${GATEWAY} metric 1
    fi
  fi
  if ! /sbin/ip -6 route show | grep "^default" 1> /dev/null ; then
    if [ ! "$GATEWAY6" = "" ]; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip route add ::/0 via ${GATEWAY6} metric 1" | $LOGGER
      /sbin/ip route add ::/0 via ${GATEWAY6} metric 1
    fi
  fi
}

# Function to take down an existing default gateway:
gateway_down() {
  if /sbin/ip -4 route show | grep "^default" 1> /dev/null ; then
    if [ ! "$GATEWAY" = "" ]; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip route del 0.0.0.0/0 via ${GATEWAY}" | $LOGGER
      /sbin/ip route del 0.0.0.0/0 via ${GATEWAY}
    fi
  fi
  if /sbin/ip -6 route show | grep "^default" 1> /dev/null ; then
    if [ ! "$GATEWAY6" = "" ]; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip route del ::/0 via ${GATEWAY6}" | $LOGGER
      /sbin/ip route del ::/0 via ${GATEWAY6}
    fi
  fi
}

# Function to start the network:
start() {
  # pre hook
  [ -x /etc/rc.d/rc.inet1-pre ] && /etc/rc.d/rc.inet1-pre start
  lo_up
  for i in ${IFNAME[@]} ; do
    if_up $i
  done
  # main hook
  [ -x /etc/rc.d/rc.inet1-main ] && /etc/rc.d/rc.inet1-main start
  gateway_up
  # post hook
  [ -x /etc/rc.d/rc.inet1-post ] && /etc/rc.d/rc.inet1-post start
}

# Function to stop the network:
stop() {
  # post hook
  [ -x /etc/rc.d/rc.inet1-post ] && /etc/rc.d/rc.inet1-post stop
  gateway_down
  # main hook
  [ -x /etc/rc.d/rc.inet1-main ] && /etc/rc.d/rc.inet1-main stop
  for i in ${IFNAME[@]} ; do
    if_down $i
  done
  lo_down
  # pre hook
  [ -x /etc/rc.d/rc.inet1-pre ] && /etc/rc.d/rc.inet1-pre stop
}


############
### MAIN ###
############

case "$1" in
'start') # "start" brings up all configured interfaces:
  start
  ;;
'stop') # "stop" takes down all configured interfaces:
  stop
  ;;
'restart') # "restart" restarts the network:
  stop
  start
  ;;
*_start) # Example: "eth1_start" will start the specified interface 'eth1'
  INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
  if_up $INTERFACE
  gateway_up
  ;;
*_stop) # Example: "eth0_stop" 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
  ;;
'up') # "up" does the same thing as "start"
  start
  ;;
'down') # "down" does the same thing as "stop"
  stop
  ;;
*_up) # "*_up" does the same thing as "*_start"
  INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
  if_up $INTERFACE
  gateway_up
  ;;
*_down) # "*_down" does the same thing as "*_stop"
  INTERFACE=`echo $1 | /bin/cut -d '_' -f 1`
  if_down $INTERFACE
  ;;
*) # The default is to bring up all configured interfaces:
  start
esac

# End of /etc/rc.d/rc.inet1