Initial revision

1 files changed, 99 insertions, 0 deletions

diff --git a/vde/build/rc.vdenetwork b/vde/build/rc.vdenetwork
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+#!/bin/sh
+# Qemu environment preparation script
+# ---------------------------------------------------------------------------
+#
+# After running this startup script, run a QEMU virtual machine in this way:
+#
+#     vdeqemu [qemu_option [qemu_option], ...]
+#
+# The vdeqemu program will automatically connect
+# the QEMU virtual machine to the VDE switch.
+#
+# ---------------------------------------------------------------------------
+
+# The IP configuration for the tap device that will be used for
+# the virtual machine network:
+
+TAP_DEV=tap0
+TAP_IP=10.111.111.254
+TAP_MASK=255.255.255.0
+
+TAP_BCAST=`/bin/ipmask ${TAP_MASK} ${TAP_IP} | cut -f 1 -d ' '`
+
+# Definitions for the LAN segment the Qemu virtual machines will be in.
+# These definitions will be fed to dnsmasq - this program will provide DNS and DHCP to the
+# Qemu LAN.
+
+# The VM_IPLOW and VM_IPHIGH addresses must agree with the definitions for the tap0 device
+# above. These 'low' and 'high' values are the IP address range for the DHCP server to use.
+
+VM_DOMAIN=qemu.lan
+VM_IPLOW=10.111.111.128
+VM_IPHIGH=10.111.111.199
+VM_BCAST=${TAP_BCAST}
+VM_MASK=${TAP_MASK}
+
+# For additional options to dnsmasq:
+
+DNSMASQ_OPTIONS="--server /barrier.lan/192.168.0.11 \
+                 --server /ibm.com/9.132.41.1"
+
+# See how we were called.
+
+case "$1" in
+  start)
+        echo -n "Starting VDE network for QEMU: "
+
+        # Start tap switch
+        vde_switch -tap ${TAP_DEV} -daemon
+
+        # Bring tap interface up
+        ifconfig ${TAP_DEV} ${TAP_IP} broadcast ${TAP_BCAST} netmask ${TAP_MASK}
+
+        # Start IP Forwarding
+        echo "1" > /proc/sys/net/ipv4/ip_forward
+        iptables -t nat -A POSTROUTING -o eth+ -j MASQUERADE
+        iptables -t nat -A POSTROUTING -o ath+ -j MASQUERADE
+
+        # Change pipe permission
+        chmod 666 /tmp/vde.ctl
+
+        # If we are running 2.6, apply workaround
+        if uname -r | grep '^2.4'; then
+          echo 1024 > /proc/sys/dev/rtc/max-user-freq
+        fi
+
+        # Start dnsmasq, the DNS/DHCP server
+        # for our Virtual Machines behind the tap0 interface
+        /usr/sbin/dnsmasq \
+          --log-queries \
+          --user=named \
+          --dhcp-leasefile=/var/state/dhcp/qemu-dhcpd.leases \
+          --dhcp-range=${VM_IPLOW},${VM_IPHIGH},${VM_MASK},${VM_BCAST},8h \
+          --interface=${TAP_DEV} \
+          --domain=${VM_DOMAIN} \
+          $DNSMASQ_OPTIONS
+        echo
+        ;;
+  stop)
+        echo -n "Stopping VDE network for QEMU: "
+        {
+        # Bring tap interface down
+        ifconfig ${TAP_DEV} down
+        # Kill VDE switch
+        pgrep -f vde_switch | xargs kill -TERM
+        # Remove the control socket
+        rm -f /tmp/vde.ctl
+        # Stop dnsmasq
+        pgrep -f dnsmasq | xargs kill -TERM
+        } >/dev/null 2>&1
+        echo
+        ;;
+  restart|reload)
+        $0 stop
+        $0 start
+        ;;
+  *)
+        echo "Usage: $0 {start|stop|restart|reload}"
+        exit 1
+esac