13c078ddbd
Apparently even iptables-restore does not handle concurrent firewall updates. This is especially a problem in case of HVM, which have two network interfaces (one through stubom and the other direct) added at the same time.
68 lines
2.7 KiB
Bash
Executable File
68 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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#============================================================================
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# /etc/xen/vif-route-qubes
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#
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# Script for configuring a vif in routed mode.
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# The hotplugging system will call this script if it is specified either in
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# the device configuration given to Xend, or the default Xend configuration
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# in /etc/xen/xend-config.sxp. If the script is specified in neither of those
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# places, then vif-bridge is the default.
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#
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# Usage:
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# vif-route (add|remove|online|offline)
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#
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# Environment vars:
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# vif vif interface name (required).
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# XENBUS_PATH path to this device's details in the XenStore (required).
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#
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# Read from the store:
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# ip list of IP networks for the vif, space-separated (default given in
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# this script).
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#============================================================================
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dir=$(dirname "$0")
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. "$dir/vif-common.sh"
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#main_ip=$(dom0_ip)
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lockfile=/var/run/xen-hotplug/vif-lock
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case "$command" in
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online)
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ifconfig ${vif} up
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echo 1 >/proc/sys/net/ipv4/conf/${vif}/proxy_arp
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ipcmd='add'
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iptables_cmd='-I PREROUTING 1'
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cmdprefix=''
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;;
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offline)
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do_without_error ifdown ${vif}
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ipcmd='del'
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iptables_cmd='-D PREROUTING'
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cmdprefix='do_without_error'
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;;
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esac
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domid=${vif/vif/}
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domid=${domid/.*/}
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# metric must be possitive, but prefer later interface
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# 32752 is max XID aka domid
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metric=$[ 32752 - $domid ]
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if [ "${ip}" ] ; then
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# If we've been given a list of IP addresses, then add routes from dom0 to
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# the guest using those addresses.
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for addr in ${ip} ; do
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${cmdprefix} ip route ${ipcmd} ${addr} dev ${vif} metric $metric
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done
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echo -e "*raw\n$iptables_cmd -i ${vif} ! -s ${ip} -j DROP\nCOMMIT" | \
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${cmdprefix} flock $lockfile iptables-restore --noflush
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back_ip=`qubesdb-read /qubes-netvm-gateway`
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${cmdprefix} ip addr ${ipcmd} ${back_ip}/32 dev ${vif}
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fi
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log debug "Successful vif-route-qubes $command for $vif."
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if [ "$command" = "online" ]
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then
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success
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fi
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