Switch to using vif-routing mode when there is a node attribute that

say to do that instead of bridge mode. Sadly, the xen script that does
this is broken and so here is our version.

clientside/tmcc/linux/GNUmakefile.in

 #
-# Copyright (c) 2000-2013 University of Utah and the Flux Group.
+# Copyright (c) 2000-2014 University of Utah and the Flux Group.
 # 
 # {{{EMULAB-LICENSE
 # 
@@ -328,6 +328,7 @@ xen-install:	dir-install
 	$(INSTALL) -m 755 $(SRCDIR)/xen/interfaces $(SYSETCDIR)/network/
 	$(INSTALL) -m 755 $(SRCDIR)/xen/emulab-cnet.pl $(SYSETCDIR)/xen/scripts/
 	$(INSTALL) -m 755 $(SRCDIR)/xen/emulab-enet.pl $(SYSETCDIR)/xen/scripts/
+	$(INSTALL) -m 755 $(SRCDIR)/xen/vif-route-emulab $(SYSETCDIR)/xen/scripts/
 	$(INSTALL) -m 755 $(SRCDIR)/xen/emulab-tun.pl $(SYSETCDIR)/xen/scripts/
 	$(INSTALL) -m 755 $(SRCDIR)/xen/create-image $(LBINDIR)/
 	$(INSTALL) -m 755 $(SRCDIR)/xen/mkimagecache $(BINDIR)/

clientside/tmcc/linux/xen/vif-route-emulab

+#!/bin/bash
+#============================================================================
+# ${XEN_SCRIPT_DIR}/vif-route
+#
+# Script for configuring a vif in routed mode.
+# The hotplugging system will call this script if it is specified either in
+# the device configuration given to Xend, or the default Xend configuration
+# in ${XEN_CONFIG_DIR}/xend-config.sxp.  If the script is specified in
+# neither of those places, then vif-bridge is the default.
+#
+# Usage:
+# vif-route (add|remove|online|offline)
+#
+# Environment vars:
+# dev         vif interface name (required).
+# XENBUS_PATH path to this device's details in the XenStore (required).
+#
+# Read from the store:
+# ip      list of IP networks for the vif, space-separated (default given in
+#         this script).
+#============================================================================
+
+dir=$(dirname "$0")
+. "${dir}/vif-common.sh"
+
+main_ip=$(dom0_ip)
+bogus_ip="172.16.0.3"
+
+case "${command}" in
+    online)
+        ifconfig ${dev} ${bogus_ip} netmask 255.255.255.255 up
+        echo 1 >/proc/sys/net/ipv4/conf/${dev}/proxy_arp
+        ipcmd='add'
+        cmdprefix=''
+        ;;
+    offline)
+        do_without_error ifdown ${dev}
+        ipcmd='del'
+        cmdprefix='do_without_error'
+        ;;
+esac
+
+if [ "${ip}" ] ; then
+    # If we've been given a list of IP addresses, then add routes from dom0 to
+    # the guest using those addresses.
+    for addr in ${ip} ; do
+      ${cmdprefix} ip route ${ipcmd} ${addr} dev ${dev} src ${main_ip}
+    done
+fi
+
+log debug "Successful vif-route ${command} for ${dev}."
+if [ "${command}" = "online" ]
+then
+  success
+fi