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#
# Copyright (c) 2005 XenSource Ltd.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Gentoo doesn't have ifup/ifdown, so we define appropriate alternatives.
# Other platforms just use ifup / ifdown directly.
##
# preiftransfer
#
# @param $1 The current name for the physical device, which is also the name
# that the virtual device will take once the physical device has
# been renamed.
if ! which ifup >/dev/null 2>/dev/null
then
preiftransfer()
{
true
}
ifup()
{
false
}
ifdown()
{
false
}
else
preiftransfer()
{
true
}
fi
first_file()
{
t="$1"
shift
for file in $@
do
if [ "$t" "$file" ]
then
echo "$file"
return
fi
done
}
find_dhcpd_conf_file()
{
first_file -f /etc/dhcp3/dhcpd.conf /etc/dhcpd.conf
}
find_dhcpd_init_file()
{
first_file -x /etc/init.d/{dhcp3-server,dhcp,dhcpd}
}
find_dhcpd_arg_file()
{
first_file -f /etc/sysconfig/dhcpd /etc/defaults/dhcp /etc/default/dhcp3-server
}
# configure interfaces which act as pure bridge ports:
_setup_bridge_port() {
local dev="$1"
local virtual="$2"
# take interface down ...
ip link set ${dev} down
if [ $virtual -ne 0 ] ; then
# Initialise a dummy MAC address. We choose the numerically
# largest non-broadcast address to prevent the address getting
# stolen by an Ethernet bridge for STP purposes.
# (FE:FF:FF:FF:FF:FF)
ip link set ${dev} address fe:ff:ff:ff:ff:ff || true
fi
# ... and configure it
ip addr flush ${dev}
}
setup_physical_bridge_port() {
_setup_bridge_port $1 0
}
setup_virtual_bridge_port() {
_setup_bridge_port $1 1
}
# Usage: create_bridge bridge
create_bridge () {
local bridge=$1
# Don't create the bridge if it already exists.
if [ ! -e "/sys/class/net/${bridge}/bridge" ]; then
brctl addbr ${bridge}
brctl stp ${bridge} off
brctl setfd ${bridge} 0
fi
}
# Usage: add_to_bridge bridge dev
add_to_bridge () {
local bridge=$1
local dev=$2
# Don't add $dev to $bridge if it's already on a bridge.
if [ -e "/sys/class/net/${bridge}/brif/${dev}" ]; then
ip link set ${dev} up || true
return
fi
brctl addif ${bridge} ${dev}
ip link set ${dev} up
}
# Usage: set_mtu bridge dev
set_mtu () {
local bridge=$1
local dev=$2
mtu="`ip link show ${bridge}| awk '/mtu/ { print $5 }'`"
if [ -n "$mtu" ] && [ "$mtu" -gt 0 ]
then
ip link set ${dev} mtu $mtu || :
fi
}
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