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  • This comparison shows the changes necessary to convert path 
    /openrisc/trunk/or1ksim
    from Rev 460 to Rev 461
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  •

Rev 460 → Rev 461

/brend.sh
26,24 → 26,32
 
# Pre-requisites: bridge-utils must be installed.
 
# Usage: ./brset.sh <bridge> <eth> <mac> <tap> [<tap> <tap> ...]
# Usage: ./brend.sh <bridge> <eth> <tap>
 
# - <bridge> is the bridge interface to use, e.g. br0
# - <eth> is the hardware ethernet interface to use, e.g. eth0
# - <tap> is the tap interface to use, e.g. tap0
 
# The tap interface can subsequently be deleted (so long as no one else is
# using it) with
# Check we have the right number of arguments
if [ "x$#" != "x3" ]
then
echo "Usage: ./brend.sh <bridge> <eth> <tap>"
exit 1
fi
 
# openvpn --rmtun --dev tap<n>
# Check we are root
euid=`id -un`
if [ "x${euid}" != "xroot" ]
then
echo "Must run as root"
exit 1
fi
 
# Define Bridge Interface
# Break out the arguments
br=$1
shift
eth=$2
tap=$3
 
# Host ethernet interface to use
eth=$1
shift
 
# Determine the IP address, netmask and broadcast of the bridge.
eth_ip=`ifconfig $br | \
grep "inet addr" | \
58,18 → 66,53
head -1 | \
sed -e 's/^.*Bcast:\([^ \t]*\).*$/\1/'`
 
# Define list of TAP interfaces to be bridged,
tap=$*
# Close the firewall to the tap and bridge
iptables -D INPUT -i ${tap} -j ACCEPT
iptables -D INPUT -i ${br} -j ACCEPT
iptables -D FORWARD -i ${br} -j ACCEPT
 
echo "Deleting bridge $br"
echo " Host Ethernet device: $eth"
echo " Host IP address: $eth_ip"
echo " Host netmask: $eth_netmask"
echo " Host broadcast: $eth_broadcast"
# Take down the bridge and delete it
ifconfig ${br} down
 
# Delete the bridge
ifconfig $br down
brctl delbr $br
if [ $? != 0 ]
then
echo "Failed to take down ${br}"
exit 1
fi
 
# Restore the Ethernet interface
ifconfig $eth $eth_ip netmask $eth_netmask broadcast $eth_broadcast
brctl delbr ${br}
 
if [ $? != 0 ]
then
echo "Failed to take delete ${br}"
exit 1
fi
 
# Delete the TAP interface. Note we mustn't have anything using it. It's
# rather harsh, but we use fuser to ensure this (it will take out all users of
# any TAP/TUN interface).
fuser -k /dev/net/tun
openvpn --rmtun --dev ${tap}
 
if [ $? != 0 ]
then
echo "Failed to remove ${tap}"
exit 1
fi
 
# Restore the Ethernet interface. We could use ifconfig with the IP address,
# netmask and broadcast mask from earlier, but this does not seem to work in a
# DHCP world
# ifconfig ${eth} ${eth_ip} netmask ${eth_netmask} broadcast ${eth_broadcast}
# Instead we use a single shot dhcp configuration. In future the extant eth0
# dhclient will refresh the lease.
dhclient -1 -d ${eth0}
 
if [ $? != 0 ]
then
echo "Failed to get lease for ${eth}"
exit 1
fi
 
# Kill the outstanding br0 DHCL client
kill `ps ax | grep "dhclient.*${br}" | grep -v "grep" | cut -c 1-5`
/brstart.sh
26,26 → 26,37
 
# Pre-requisites: bridge-utils must be installed.
 
# Usage: ./brset.sh <bridge> <eth> <tap> [<tap> <tap> ...]
# Usage: ./brstart.sh <username> <groupname> <bridge> <eth> <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:
# Check we have the right number of arguments
if [ "x$#" != "x5" ]
then
echo "Usage: ./brstart.sh <username> <groupname> <bridge> <eth> <tap>"
exit 1
fi
 
# openvpn --mktun --dev tap<n> --user <username> --group <groupname>
# Check we are root
euid=`id -un`
if [ "x${euid}" != "xroot" ]
then
echo "Must run as root"
exit 1
fi
 
# Define Bridge Interface
br=$1
shift
# Break out the arguments
username=$1
groupname=$2
br=$3
eth=$4
tap=$5
 
# Host ethernet interface to use
eth=$1
shift
 
# Determine the IP address, netmask and broadcast of the host.
# Determine the IP address, netmask and broadcast of the current Ethernet
# interface. This is used if the bridge is set up manually, rather than using
# DHCP.
eth_ip=`ifconfig $eth | \
grep "inet addr" | \
head -1 | \
59,34 → 70,56
head -1 | \
sed -e 's/^.*Bcast:\([^ \t]*\).*$/\1/'`
 
# Define list of TAP interfaces to be bridged,
tap=$*
# Create the TAP interface
openvpn --mktun --dev ${tap} --user ${username} --group ${groupname}
 
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"
if [ $? != 0 ]
then
echo "Failed to create ${tap}"
exit 1
fi
 
# Create the bridge
brctl addbr $br
brctl addbr ${br}
 
# Add the host Ethernet and TAP interfaces
brctl addif $br $eth
if [ $? != 0 ]
then
echo "Failed to create ${br}"
exit 1
fi
 
for t in $tap; do
brctl addif $br $t
done
# Add the host Ethernet and TAP interfaces, removing the IP addresses of the
# underlying interfaces.
for i in ${eth} ${tap}
do
# Add the interface
brctl addif ${br} ${i}
 
# Remove the IP addresses of the underlying interfaces
ifconfig $eth 0.0.0.0 promisc up
if [ $? != 0 ]
then
echo "Failed to create ${i}"
exit 1
fi
 
for t in $tap; do
ifconfig $t 0.0.0.0 promisc up
# Remove the IP address
ifconfig ${i} 0.0.0.0 promisc up
 
if [ $? != 0 ]
then
echo "Failed to remove IP interface of ${i}"
exit 1
fi
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
# Reconfigure the bridge to have the appropriate Ethernet address. This uses
# dhclient to get the information from DHCP, but we could instead use
# ifconfig and the data about the original IP address, netmask and broadcast
# mask as follows:
# ifconfig ${br} ${eth_ip} netmask ${eth_netmask} broadcast ${eth_broadcast}
dhclient ${br}
 
# Open up firewall to the tap and bridge. We have a generic reject at the end
# of the chain, so we insert these at the start.
iptables -I INPUT 1 -i ${tap} -j ACCEPT
iptables -I INPUT 1 -i ${br} -j ACCEPT
iptables -I FORWARD 1 -i ${br} -j ACCEPT

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