CSIT-241: IPv6 Router Advertisement

[csit.git] / resources / traffic_scripts / check_ra_packet.py

diff --git a/resources/traffic_scripts/check_ra_packet.py b/resources/traffic_scripts/check_ra_packet.py
index d95ef2d..231e07d 100755 (executable)
--- a/resources/traffic_scripts/check_ra_packet.py
+++ b/resources/traffic_scripts/check_ra_packet.py
@@ -49,13 +49,14 @@ def main():
      part.
     """
 
-    args = TrafficScriptArg(['src_mac'])
+    args = TrafficScriptArg(['src_mac', 'interval'])
 
     rx_if = args.get_arg('rx_if')
     src_mac = args.get_arg('src_mac')
+    interval = int(args.get_arg('interval'))
     rxq = RxQueue(rx_if)
 
-    ether = rxq.recv(8)
+    ether = rxq.recv(max(5, interval))
 
     # Check whether received packet contains layer RA and check other values
     if ether is None:
@@ -65,14 +66,19 @@ def main():
         raise RuntimeError('Not an RA packet received {0}'
                            .format(ether.__repr__()))
 
-    address = ipaddress.IPv6Address(unicode(ether['IPv6'].src))
+    src_address = ipaddress.IPv6Address(unicode(ether['IPv6'].src))
+    dst_address = ipaddress.IPv6Address(unicode(ether['IPv6'].dst))
     link_local = ipaddress.IPv6Address(unicode(mac_to_ipv6_linklocal(src_mac)))
+    all_nodes_multicast = ipaddress.IPv6Address(u'ff02::1')
 
-    if address != link_local:
+    if src_address != link_local:
         raise RuntimeError(
             'Source address ({0}) not matching link local address({1})'.format(
-                address, link_local))
-
+                src_address, link_local))
+    if dst_address != all_nodes_multicast:
+        raise RuntimeError('Packet destination address ({0}) is not the all '
+                           'nodes multicast address ({1}).'.format(
+                            dst_address, all_nodes_multicast))
     if ether['IPv6'].hlim != 255:
         raise RuntimeError('Hop limit not correct: {0}!=255'.format(
             ether['IPv6'].hlim))