Add the ridiculous arp remctl we all want but shouldn't need

diff --git a/debian/changelog b/debian/changelog
index 470c551..ba2843f 100644 (file)
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+invirt-remote (0.4.21) precise; urgency=low
+
+  * Add the long-awaited arp remctl
+
+ -- Mitchell Berger <mitchb@mit.edu>  Fri, 18 May 2018 04:08:00 -0400
+
 invirt-remote (0.4.20) precise; urgency=low
 
   * Fix a typo.

diff --git a/host/usr/sbin/invirt-vmcontrol b/host/usr/sbin/invirt-vmcontrol
index 66f5ca6..eaac5ac 100755 (executable)
--- a/host/usr/sbin/invirt-vmcontrol
+++ b/host/usr/sbin/invirt-vmcontrol
@@ -41,6 +41,22 @@ case "$ACTION" in
     vnctoken)
         invirt-vnc-authtoken "$ORIGMACHINE"
         ;;
+    arp)
+       iface=`invirt-getconf xen.iface`
+       xs_prefix="/local/domain/0/backend/vif"
+       domid=`xm domid $MACHINE`
+       for vif in `xenstore-list $xs_prefix/$domid`; do
+           ip=`xenstore-read $xs_prefix/$domid/$vif/ip`
+           script=`xenstore-read $xs_prefix/$domid/$vif/script`
+           gw=`echo $script | sed -ne 's/.* gateway=\([0-9\.]*\).*/\1/p'`
+           oip=`echo $script | sed -ne 's/.* other_ip=\([0-9\.]*\).*/\1/p'`
+           ogw=`echo $script | sed -ne 's/.* other_gateway=\([0-9\.]*\).*/\1/p'`
+           timeout 5 /usr/sbin/arpspoof -i $iface -t $gw $ip
+           if [ -n "$oip" ]; then
+               timeout 5 /usr/sbin/arpspoof -i $iface -t $ogw $oip
+           fi
+       done
+       ;;
     *)
         echo "ERROR: Invalid Command"
         exit 34

diff --git a/server/usr/sbin/invirt-remctl-help b/server/usr/sbin/invirt-remctl-help
index 33c67a6..98ea9bd 100755 (executable)
--- a/server/usr/sbin/invirt-remctl-help
+++ b/server/usr/sbin/invirt-remctl-help
@@ -17,6 +17,7 @@ help = [
     ('reboot',    'reboot your VM (with xm reboot)'),
     ('install',   'autoinstall your VM (takes a series of key=value pairs; \n\t\tvalid arguments include mirror, dist, arch, imagesize,\n\t\tand noinstall)'),
     #also CD images on create/reboot
+    ('arp',       'attempt to repair broken network connectivity by sending\n\t\tgratuitous ARP reply messages to the router'),
 ]
 helpdict = dict(help)