#!/bin/bash
# Thierry Parmentelat <thierry.parmentelat@inria.fr>
-# Copyright (C) 2010 INRIA
+# Copyright (C) 2010 INRIA
#
# Establishment of a runtime environment for a
# virtual machine under QEMU, This script allows the host box
#################### compute INTERFACE_LAN
# use /proc/net/dev instead of a hard-wired list
function gather_interfaces () {
- python <<EOF
-for line in file("/proc/net/dev"):
- if ':' not in line: continue
- ifname=line.replace(" ","").split(":")[0]
- if ifname.find("lo")==0: continue
- if ifname.find("br")==0: continue
- if ifname.find("virbr")==0: continue
- if ifname.find("tap")==0: continue
- print ifname
+ python3 << EOF
+with open("/proc/net/dev") as feed:
+ for line in feed:
+ if ':' not in line:
+ continue
+ ifname = line.replace(" ","").split(":")[0]
+ if ifname.find("lo")==0:
+ continue
+ if ifname.find("br")==0:
+ continue
+ if ifname.find("virbr")==0:
+ continue
+ if ifname.find("tap")==0:
+ continue
+ print(ifname)
EOF
}
-
+
function discover_interface () {
for ifname in $(gather_interfaces); do
ip link show $ifname | grep -qi 'state UP' && { echo $ifname; return; }
echo "========== $COMMAND: entering start - beg"
hostname
uname -a
- ifconfig
- netstat -rn
+ ip address show
+ ip route show
echo "========== $COMMAND: entering start - end"
# disable netfilter calls for bridge interface (they cause panick on 2.6.35 anyway)
type -p brctl &> /dev/null || { echo "brctl not found, please install bridge-utils" ; exit 1 ; }
#if we have already configured the same host_box no need to do it again
- /sbin/ifconfig $INTERFACE_BRIDGE &> /dev/null && {
+ ip address show $INTERFACE_BRIDGE &> /dev/null && {
echo "Bridge interface $INTERFACE_BRIDGE already set up - $COMMAND start exiting"
exit 0
}
- /sbin/ifconfig $INTERFACE_LAN &>/dev/null || {
+ ip address show $INTERFACE_LAN &> /dev/null || {
echo "Cannot use interface $INTERFACE_LAN - exiting"
exit 1
}
#Getting host IP/masklen
- address=$(/sbin/ip addr show $INTERFACE_LAN | grep -v inet6 | grep inet | head --lines=1 | awk '{print $2;}')
+ address=$(/sbin/ip address show $INTERFACE_LAN | grep -v inet6 | grep inet | head --lines=1 | awk '{print $2;}')
[ -z "$address" ] && { echo "ERROR: Could not determine IP address for $INTERFACE_LAN" ; exit 1 ; }
-
- broadcast=$(/sbin/ip addr show $INTERFACE_LAN | grep -v inet6 | grep inet | head --lines=1 | awk '{print $4;}')
+
+ broadcast=$(/sbin/ip address show $INTERFACE_LAN | grep -v inet6 | grep inet | head --lines=1 | awk '{print $4;}')
[ -z "$broadcast" ] && echo "WARNING: Could not determine broadcast address for $INTERFACE_LAN"
- gateway=$(netstat -rn | grep '^0.0.0.0' | awk '{print $2;}')
+ gateway=$(ip route show | grep default | awk '{print $3;}')
[ -z "$gateway" ] && echo "WARNING: Could not determine gateway IP"
### do it
#Restarting udev
- echo "Starting udev ..."
- /sbin/udevd restart
- if modprobe kqemu &> /dev/null ; then
- echo "(bridge-init) kqemu loaded"
- else
- echo "(bridge-init) WARNING : Could not modprobe kqemu"
- fi
+ #echo "Starting udev ..."
+ #/sbin/udevd restart
+ #if modprobe kqemu &> /dev/null ; then
+ # echo "(bridge-init) kqemu loaded"
+ #else
+ # echo "(bridge-init) WARNING : Could not modprobe kqemu"
+ #fi
#Loading the tun/tap model
if modprobe tun ; then
echo "tun loaded"
#brctl stp $INTERFACE_BRIDGE yes
brctl addif $INTERFACE_BRIDGE $INTERFACE_LAN
echo "Activating promiscuous mode INTERFACE_LAN=$INTERFACE_LAN"
- /sbin/ifconfig $INTERFACE_LAN 0.0.0.0 promisc up
+ ip link set dev $INTERFACE_LAN promisc on
sleep 2
echo "Setting bridge address=$address broadcast=$broadcast"
# static
- /sbin/ifconfig $INTERFACE_BRIDGE $address broadcast $broadcast up
+ ip address add $address broadcast $broadcast dev $INTERFACE_BRIDGE
+ # turn on bridge interface
+ ip link set dev $INTERFACE_BRIDGE up
+ ip address del $address dev $INTERFACE_LAN
sleep 1
-
+
#Reconfigure the routing table
- echo "Configuring gateway=$gateway"
- route add default gw $gateway
+ echo "Adding default route via gateway=$gateway on dev $INTERFACE_LAN"
+ ip route add 0.0.0.0/0 via $gateway dev $INTERFACE_BRIDGE
echo "========== $COMMAND: exiting start - beg"
- ifconfig
- netstat -rn
+ ip address show
+ ip route show
echo "========== $COMMAND: exiting start - end"
}
-#Adding a new interface to the bridge: this is used by qemu-ifup
+#Adding a new interface to the bridge: this is used by qemu-ifup
function add () {
[[ -z "$@" ]] && { echo "Usage: $COMMAND add ifname" ; exit 1 ; }
INTERFACE_LAN=$1; shift
echo "========== $COMMAND: entering add - beg"
- ifconfig
- netstat -rn
+ ip address show
+ ip route show
echo "========== $COMMAND: entering add - end"
echo "Activating link for $INTERFACE_LAN..."
echo "========== $COMMAND: exiting add - beg"
- ifconfig
- netstat -rn
+ ip address show
+ ip route show
echo "Installed iptables"
iptables-save
-
+
echo "========== $COMMAND: exiting add - end"
}
### Checking
type -p brctl &> /dev/null || { echo "brctl not found, please install bridge-utils" ; exit 1 ; }
- /sbin/ifconfig $INTERFACE_BRIDGE &> /dev/null || {
+ ip address show $INTERFACE_BRIDGE &> /dev/null || {
echo "Bridge interface $INTERFACE_BRIDGE does not exist - $COMMAND stop exiting"
exit 0
}
+ address=$(/sbin/ip address show $INTERFACE_BRIDGE | grep -v inet6 | grep inet | head --lines=1 | awk '{print $2;}')
brctl delif $INTERFACE_BRIDGE $INTERFACE_LAN
- /sbin/ifconfig $INTERFACE_BRIDGE down
+ ip address del $address dev $INTERFACE_BRIDGE
brctl delbr $INTERFACE_BRIDGE
- /sbin/service network restart
- /sbin/service iptables restart
+ systemctl NetworkManager restart
}
function main () {