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|
#!/bin/bash
# $Header$
# IFACE = Logical interface name
# MODE = start | stop
# METHOD = manual, otherwise exit!
# IF_ADDRESS = address/prefix
# IF_DEVICE = physical interface name
# IF_SCOPE = scope of address
# IF_BRD = broadcast address (all1 default, all0/none allowed)
# IF_FLAGS = "secondary"
# IF_LABEL = set label (1 default)
# IF_WAIT_TENTATIVE = wait for non-tentative IP addresses (1 default)
# IF_PREFLFT = preferred lifetime
. /etc/network/ifupdown-scripts-zg2.d/common-functions
# check that an address has been configured for this interface
# TODO: Maybe check if it actually looks like an IP address?
[ -z "${IF_ADDRESS:-}" ] && exit 0
case "$MODE" in
start)
# build address parameters, parse flags
ADDRPARM="dev $IF_DEVICE"
if [ "$IF_DEVICE" != "$IFACE" ]; then
# if logical device name differs from physical, label interface
if [ "${IF_LABEL:-1}" != "0" ]; then
ADDRPARM="$ADDRPARM label $IF_DEVICE:$IFACE"
fi
fi
if [ "$(addrtype $IF_ADDRESS)" = "v4" ]; then
IF_BRD=${IF_BRD:="all1"}
case "$IF_BRD" in
none) : ;;
all1) ADDRPARM="$ADDRPARM broadcast +";;
all0) ADDRPARM="$ADDRPARM broadcast -";;
*) ADDRPARM="$ADDRPARM broadcast $IF_BRD";;
esac
fi
ADDRPARM="$ADDRPARM $IF_ADDRESS"
ADDRPARM="$ADDRPARM ${IF_SCOPE:+scope $IF_SCOPE}"
ADDRPARM="$ADDRPARM ${IF_PREFLFT:+preferred_lft $IF_PREFLFT}"
SECONDARY=""
if echo $IF_FLAGS | grep -s -q -i "secondary"; then
SECONDARY="1"
fi
# initialize interface
cmd "ip addr add $ADDRPARM"
# check if primary or secondary IP
# primary / secondary IP addresses need to be addresed differently since
# taking down a primary IP also removes the secondaries. This can have
# unwanted effects to network connectivity and wrecks our interface state.
if ip addr show dev "$IF_DEVICE" secondary | \
grep -s -q "$IF_ADDRESS"; then
# $IF_ADDRESS has become secondary IP
if [ -z "${SECONDARY:-}" ]; then
# $IF_ADDRESS is not marked as secondary
# take away IP again
ip addr del "$ADDRPARM"
abort "secondary IP not marked as such in /etc/network/interface"
fi
elif ip addr show dev "$IF_DEVICE" primary | \
grep -s -q "$IF_ADDRESS"; then
# $IF_ADDRESS has become primary IP
if [ -n "$SECONDARY" ]; then
# $IF_ADDRESS is marked as secondary
# take away IP again
ip addr del "$ADDRPARM"
abort "secondary IP came up as primary. Bring up primary before bringing up secondaries."
fi
fi
if [ "${IF_WAIT_TENTATIVE:-1}" != "1" ]; then
loop=30
while ip --oneline addr show dev "$IF_DEVICE" | grep --quiet tentative; do
if [ $loop -eq 30 ]; then
verbose "waiting for IPv6 address to leave tentative state"
fi
if [ $loop -eq 0 ]; then
verbose "giving up on tentative IPv6 address"
cmd "ip --oneline addr show dev $IF_DEVICE"
break
fi
sleep 1
loop=$(($loop-1))
done
fi
add_down "address" "addr del $ADDRPARM"
add_down "ip-address" "$IF_ADDRESS"
add_down "ip-dev" "$IF_DEVICE"
;;
stop)
ADDR=$(state_entry ip-address)
DEV=$(state_entry ip-dev)
exec_down "ip-address" ""
exec_down "ip-dev" ""
if [ -n "$DEV" ]; then
if ip addr show dev "$DEV" primary | \
grep -s -q "$ADDR"; then
# we are trying to take down a primary IP address
if ip addr show dev "$DEV" secondary | \
grep -s -q inet[^6]; then
# there are still secondary IPs present
abort "take down secondary IPs before taking down primary IPs."
fi
fi
fi
exec_down "address" "ip"
;;
*)
;;
esac
# end of file
|
