1 files changed, 118 insertions, 0 deletions
diff --git a/os-plugins/plugins/xen/files/xen.examples/scripts/xen-network-common.sh b/os-plugins/plugins/xen/files/xen.examples/scripts/xen-network-common.sh
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@@ -0,0 +1,118 @@
+#
+# Copyright (c) 2005 XenSource Ltd.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+
+# Gentoo doesn't have ifup/ifdown, so we define appropriate alternatives.
+
+# Other platforms just use ifup / ifdown directly.
+
+##
+# preiftransfer
+#
+# @param $1 The current name for the physical device, which is also the name
+#           that the virtual device will take once the physical device has
+#           been renamed.
+
+if ! which ifup >/dev/null 2>/dev/null
+then
+  preiftransfer()
+  {
+    true
+  }
+  ifup()
+  {
+    false
+  }
+  ifdown()
+  {
+    false
+  }
+else
+  preiftransfer()
+  {
+    true
+  }
+fi
+
+
+first_file()
+{
+  t="$1"
+  shift
+  for file in $@
+  do
+    if [ "$t" "$file" ]
+    then
+      echo "$file"
+      return
+    fi
+  done
+}
+
+find_dhcpd_conf_file()
+{
+  first_file -f /etc/dhcp3/dhcpd.conf /etc/dhcpd.conf
+}
+
+
+find_dhcpd_init_file()
+{
+  first_file -x /etc/init.d/{dhcp3-server,dhcp,dhcpd}
+}
+
+find_dhcpd_arg_file()
+{
+  first_file -f /etc/sysconfig/dhcpd /etc/defaults/dhcp /etc/default/dhcp3-server
+}
+
+# configure interfaces which act as pure bridge ports:
+setup_bridge_port() {
+    local dev="$1"
+
+    # take interface down ...
+    ip link set ${dev} down
+
+    # ... and configure it
+    ip addr flush ${dev}
+}
+
+# Usage: create_bridge bridge
+create_bridge () {
+    local bridge=$1
+
+    # Don't create the bridge if it already exists.
+    if [ ! -e "/sys/class/net/${bridge}/bridge" ]; then
+	brctl addbr ${bridge}
+	brctl stp ${bridge} off
+	brctl setfd ${bridge} 0
+    fi
+}
+
+# Usage: add_to_bridge bridge dev
+add_to_bridge () {
+    local bridge=$1
+    local dev=$2
+
+    # Don't add $dev to $bridge if it's already on a bridge.
+    if [ -e "/sys/class/net/${bridge}/brif/${dev}" ]; then
+	ip link set ${dev} up || true
+	return
+    fi
+    brctl addif ${bridge} ${dev}
+    ip link set ${dev} up
+}
+