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[/] [openrisc/] [trunk/] [or1ksim/] [brstart.sh] - Rev 458
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#!/bin/bash # Copyright (C) 2010 ORSoC AB # Copyright (C) 2010 Embecosm Limited # Contributor Julius Baxter <julius.baxter@orsoc.se> # Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> # This file is a superuser script to set up an Ethernet bridge that can be # used with Or1ksim via the TUN/TAP interface. # This program is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the Free # Software Foundation; either version 3 of the License, or (at your option) # any later version. # This program 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 General Public License for # more details. # You should have received a copy of the GNU General Public License along # with this program. If not, see <http://www.gnu.org/licenses/>. # ------------------------------------------------------------------------------ # Pre-requisites: bridge-utils must be installed. # Usage: ./brset.sh <bridge> <eth> <tap> [<tap> <tap> ...] # - <bridge> is the bridge interface to use, e.g. br0 # - <eth> is the hardware ethernet interface to use, e.g. eth0 # - <tap> is/are the persistent TAP interface(s) # The tap interfaces must have been previously set up persistently by the # superuser using for example: # openvpn --mktun --dev tap<n> --user <username> --group <groupname> # Define Bridge Interface br=$1 shift # Host ethernet interface to use eth=$1 shift # Determine the IP address, netmask and broadcast of the host. eth_ip=`ifconfig $eth | \ grep "inet addr" | \ head -1 | \ sed -e 's/^.*inet addr:\([^ \t]*\).*$/\1/'` eth_netmask=`ifconfig $eth | \ grep "Mask" | \ head -1 | \ sed -e 's/^.*Mask:\([^ \t]*\).*$/\1/'` eth_broadcast=`ifconfig $eth | \ grep "Bcast" | \ head -1 | \ sed -e 's/^.*Bcast:\([^ \t]*\).*$/\1/'` # Define list of TAP interfaces to be bridged, tap=$* echo "Creating bridge $br" echo " Host Ethernet device: $eth" echo " Host IP address: $eth_ip" echo " Host netmask: $eth_netmask" echo " Host broadcast: $eth_broadcast" echo " Target TAP device(s): $tap" # Create the bridge brctl addbr $br # Add the host Ethernet and TAP interfaces brctl addif $br $eth for t in $tap; do brctl addif $br $t done # Remove the IP addresses of the underlying interfaces ifconfig $eth 0.0.0.0 promisc up for t in $tap; do ifconfig $t 0.0.0.0 promisc up done # Reconfigure the bridge to have the Ethernet address that had been used just # by $eth. # ifconfig $br $eth_ip netmask $eth_netmask broadcast $eth_broadcast dhclient $br
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