Merge remote branch 'cros/upstream' into tempbranch

client/tests/kvm/scripts/join_mcast.py

+#!/usr/bin/python
+import socket, struct, os, signal, sys
+# -*- coding: utf-8 -*-
+
+"""
+Script used to join machine into multicast groups.
+
+@author Amos Kong <akong@redhat.com>
+"""
+
+if __name__ == "__main__":
+    if len(sys.argv) < 4:
+        print """%s [mgroup_count] [prefix] [suffix]
+        mgroup_count: count of multicast addresses
+        prefix: multicast address prefix
+        suffix: multicast address suffix""" % sys.argv[0]
+        sys.exit()
+
+    mgroup_count = int(sys.argv[1])
+    prefix = sys.argv[2]
+    suffix = int(sys.argv[3])
+
+    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    for i in range(mgroup_count):
+        mcast = prefix + "." + str(suffix + i)
+        try:
+            mreq = struct.pack("4sl", socket.inet_aton(mcast),
+                               socket.INADDR_ANY)
+            s.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
+        except:
+            s.close()
+            print "Could not join multicast: %s" % mcast
+            raise
+
+    print "join_mcast_pid:%s" % os.getpid()
+    os.kill(os.getpid(), signal.SIGSTOP)
+    s.close()