mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 10:11:27 +01:00
Keir Fraser
57bcfa11b1
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com> Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
152 lines
3.8 KiB
Bash
152 lines
3.8 KiB
Bash
#
|
|
# 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
|
|
#
|
|
|
|
|
|
dir=$(dirname "$0")
|
|
. "$dir/xen-hotplug-common.sh"
|
|
. "$dir/xen-network-common.sh"
|
|
|
|
findCommand "$@"
|
|
|
|
if [ "$command" != "online" ] &&
|
|
[ "$command" != "offline" ] &&
|
|
[ "$command" != "add" ] &&
|
|
[ "$command" != "remove" ]
|
|
then
|
|
log err "Invalid command: $command"
|
|
exit 1
|
|
fi
|
|
|
|
case "$command" in
|
|
add | remove)
|
|
exit 0
|
|
;;
|
|
esac
|
|
|
|
|
|
# Parameters may be read from the environment, the command line arguments, and
|
|
# the store, with overriding in that order. The environment is given by the
|
|
# driver, the command line is given by the Xend global configuration, and
|
|
# store details are given by the per-domain or per-device configuration.
|
|
|
|
evalVariables "$@"
|
|
|
|
ip=${ip:-}
|
|
ip=$(xenstore_read_default "$XENBUS_PATH/ip" "$ip")
|
|
|
|
# Check presence of compulsory args.
|
|
XENBUS_PATH="${XENBUS_PATH:?}"
|
|
vif="${vif:?}"
|
|
|
|
|
|
vifname=$(xenstore_read_default "$XENBUS_PATH/vifname" "")
|
|
if [ "$vifname" ]
|
|
then
|
|
if [ "$command" == "online" ] && ! ip link show "$vifname" >&/dev/null
|
|
then
|
|
do_or_die ip link set "$vif" name "$vifname"
|
|
fi
|
|
vif="$vifname"
|
|
fi
|
|
|
|
|
|
frob_iptable()
|
|
{
|
|
if [ "$command" == "online" ]
|
|
then
|
|
local c="-A"
|
|
else
|
|
local c="-D"
|
|
fi
|
|
|
|
iptables "$c" FORWARD -m physdev --physdev-in "$vif" "$@" -j ACCEPT \
|
|
2>/dev/null ||
|
|
[ "$c" == "-D" ] ||
|
|
log err \
|
|
"iptables $c FORWARD -m physdev --physdev-in $vif $@ -j ACCEPT failed.
|
|
If you are using iptables, this may affect networking for guest domains."
|
|
}
|
|
|
|
|
|
##
|
|
# Add or remove the appropriate entries in the iptables. With antispoofing
|
|
# turned on, we have to explicitly allow packets to the interface, regardless
|
|
# of the ip setting. If ip is set, then we additionally restrict the packets
|
|
# to those coming from the specified networks, though we allow DHCP requests
|
|
# as well.
|
|
#
|
|
handle_iptable()
|
|
{
|
|
# Check for a working iptables installation. Checking for the iptables
|
|
# binary is not sufficient, because the user may not have the appropriate
|
|
# modules installed. If iptables is not working, then there's no need to do
|
|
# anything with it, so we can just return.
|
|
if ! iptables -L -n >&/dev/null
|
|
then
|
|
return
|
|
fi
|
|
|
|
if [ "$ip" != "" ]
|
|
then
|
|
local addr
|
|
for addr in $ip
|
|
do
|
|
frob_iptable -s "$addr"
|
|
done
|
|
|
|
# Always allow the domain to talk to a DHCP server.
|
|
frob_iptable -p udp --sport 68 --dport 67
|
|
else
|
|
# No IP addresses have been specified, so allow anything.
|
|
frob_iptable
|
|
fi
|
|
}
|
|
|
|
|
|
##
|
|
# ip_of interface
|
|
#
|
|
# Print the IP address currently in use at the given interface, or nothing if
|
|
# the interface is not up.
|
|
#
|
|
ip_of()
|
|
{
|
|
ip addr show "$1" | awk "/^.*inet.*$1\$/{print \$2}" | sed -n '1 s,/.*,,p'
|
|
}
|
|
|
|
|
|
##
|
|
# dom0_ip
|
|
#
|
|
# Print the IP address of the interface in dom0 through which we are routing.
|
|
# This is the IP address on the interface specified as "netdev" as a parameter
|
|
# to these scripts, or eth0 by default. This function will call fatal if no
|
|
# such interface could be found.
|
|
#
|
|
dom0_ip()
|
|
{
|
|
local nd=${netdev:-eth0}
|
|
local result=$(ip_of "$nd")
|
|
if [ -z "$result" ]
|
|
then
|
|
fatal
|
|
"$netdev is not up. Bring it up or specify another interface with " \
|
|
"netdev=<if> as a parameter to $0."
|
|
fi
|
|
echo "$result"
|
|
}
|