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#!/bin/bash |
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# |
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# Copyright (C) 2011, 2012, 2013 Google Inc. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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# General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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# 02110-1301, USA. |
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|
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@SHELL_ENV_INIT@ |
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|
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readonly GANETI_TAP="gnt.com" |
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|
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function check { |
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if [ -z "$INTERFACE" ]; then |
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echo "No network interface specified" |
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exit 1 |
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fi |
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|
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if [ -z "$MODE" ]; then |
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echo "MODE not specified" |
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exit 1 |
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fi |
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} |
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|
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function is_instance_communication_tap { |
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COMMUNICATION=$(echo "$INTERFACE" | cut -d "." -f 1-2) |
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|
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if [ "$MODE" = "routed" -a "$COMMUNICATION" = "$GANETI_TAP" ] |
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then |
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return 0 |
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else |
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return 1 |
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fi |
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} |
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|
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function fix_mac { |
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# Fix the autogenerated MAC to have the first octet set to "fe" |
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# to discourage the bridge from using the TAP dev's MAC |
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FIXED_MAC=$(ip link show $INTERFACE | \ |
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awk '{if ($1 == "link/ether") printf("fe%s",substr($2,3,15))}') |
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# in case of a vif (xen_netback device) this action is not allowed |
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ip link set $INTERFACE address $FIXED_MAC || true |
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} |
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|
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function setup_bridge { |
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if [ "$MODE" = "bridged" ]; then |
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fix_mac |
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ip link set $INTERFACE up |
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ip link set $INTERFACE mtu $(</sys/class/net/${LINK}/mtu) |
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|
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# Connect the interface to the bridge |
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brctl addif $LINK $INTERFACE |
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fi |
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} |
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|
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function setup_ovs { |
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if [ "$MODE" = "openvswitch" ]; then |
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ovs-vsctl add-port ${LINK} $INTERFACE |
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fi |
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} |
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|
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function setup_route { |
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if [ "$MODE" = "routed" ]; then |
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ip link set $INTERFACE up |
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|
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if [ -z "$IP" ]; then |
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echo "Routed NIC but no IP address specified" |
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exit 1 |
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fi |
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|
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# Route traffic targeted at the IP to the interface |
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if [ -n "$LINK" ]; then |
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while ip rule del dev $INTERFACE; do :; done |
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ip rule add dev $INTERFACE table $LINK |
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ip route replace $IP table $LINK proto static dev $INTERFACE |
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|
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else |
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ip route replace $IP proto static dev $INTERFACE |
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fi |
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|
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# Allow routing and arp proxying, or ndp proxying (IPv6) |
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if [ -d "/proc/sys/net/ipv4/conf/$INTERFACE" ]; then |
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echo 1 > /proc/sys/net/ipv4/conf/$INTERFACE/proxy_arp |
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echo 1 > /proc/sys/net/ipv4/conf/$INTERFACE/forwarding |
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fi |
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|
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if [ -d "/proc/sys/net/ipv6/conf/$INTERFACE" ]; then |
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echo 1 > /proc/sys/net/ipv6/conf/$INTERFACE/proxy_ndp |
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echo 1 > /proc/sys/net/ipv6/conf/$INTERFACE/forwarding |
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fi |
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fi |
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} |