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#!/bin/bash
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#
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# Copyright (C) 2011, 2012 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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@SHELL_ENV_INIT@
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if [ -z "$INTERFACE" ]; then
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  echo "No network interface specified"
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  exit 1
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fi
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if [ -z "$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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# Execute the user-supplied network script, if applicable
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if [ -x "$CONF_DIR/kvm-vif-bridge" ]; then
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  exec $CONF_DIR/kvm-vif-bridge
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fi
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if [ "$MODE" = "bridged" ]; then
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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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  ip link set $INTERFACE address $FIXED_MAC
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  ip link set $INTERFACE up
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  ip link set $INTERFACE mtu $(</sys/class/net/${BRIDGE}/mtu)
47 3bdca55d Andrea Spadaccini
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  # Connect the interface to the bridge
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  brctl addif $BRIDGE $INTERFACE
50 57fb6fcb Guido Trotter
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elif [ "$MODE" = "openvswitch" ]; then
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  ovs-vsctl add-port ${LINK} $INTERFACE
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else
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  ip link set $INTERFACE up
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  if [ -z "$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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  # 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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  else
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    ip route replace $IP proto static dev $INTERFACE
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  fi
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  # Allow routing and arp proxying, or ndp proxying (IPv6)
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  if [ -d "/proc/sys/net/ipv4/conf/$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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  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