Fix XVM's classic networking problem

Kill arpspoof with SIGKILL when we're done with it so it doesn't
try to "clean up" and potentially tell the router that your MAC
is all-zeros.

diff --git a/debian/changelog b/debian/changelog
index 8a3ff45..97777ae 100644 (file)
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+invirt-dhcp (0.0.12) unstable; urgency=low
+
+  * Kill arpspoof with SIGKILL when we're done with it so it doesn't
+    try to "clean up" and potentially tell the router that your MAC
+    is all-zeros.
+
+ -- Mitchell Berger <mitchb@mit.edu>  Mon, 25 Jun 2018 22:11:00 -0400
+
 invirt-dhcp (0.0.11) unstable; urgency=low
 
   * Fix the typo that causes what once took quadratic time (2ms) to

diff --git a/invirt-dhcpserver b/invirt-dhcpserver
index ddad34e..20a0816 100755 (executable)
--- a/invirt-dhcpserver
+++ b/invirt-dhcpserver
@@ -413,7 +413,7 @@ class ArpspoofWorker(Thread):
         while True:
             (ip, gw) = self.queue.get()
             try:
-                p = Popen(['timeout', '5', 'arpspoof', '-i', self.iface, '-t', gw, ip], stdout=PIPE, stderr=PIPE)
+                p = Popen(['timeout', '-s', 'KILL', '5', 'arpspoof', '-i', self.iface, '-t', gw, ip], stdout=PIPE, stderr=PIPE)
                 (out, err) = p.communicate()
                 if p.returncode != 124:
                     s.syslog(s.LOG_ERR, "arpspoof returned %s for IP %s gateway %s" % (p.returncode, ip, gw))