1 files changed, 23 insertions, 8 deletions
diff --git a/GPL/traffic_scripts/lisp/lispgpe_check.py b/GPL/traffic_scripts/lisp/lispgpe_check.py
index 41bc0964e6..79d2ccfab6 100644
--- a/GPL/traffic_scripts/lisp/lispgpe_check.py
+++ b/GPL/traffic_scripts/lisp/lispgpe_check.py
@@ -35,7 +35,7 @@ from scapy.all import bind_layers, Packet
 from scapy.fields import FlagsField, BitField, XBitField, IntField
 from scapy.layers.inet import ICMP, IP, UDP
 from scapy.layers.inet6 import ICMPv6EchoRequest
-from scapy.layers.inet6 import IPv6
+from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6MLReport2, ICMPv6ND_RA
 from scapy.layers.l2 import Ether
 from scapy.packet import Raw
 
@@ -156,13 +156,28 @@ def main():
     sent_packets.append(pkt_raw)
     txq.send(pkt_raw)
 
-    if tx_if == rx_if:
-        ether = rxq.recv(2, ignore=sent_packets)
-    else:
-        ether = rxq.recv(2)
-
-    if ether is None:
-        raise RuntimeError(u"ICMP echo Rx timeout")
+    while True:
+        if tx_if == rx_if:
+            ether = rxq.recv(2, ignore=sent_packets)
+        else:
+            ether = rxq.recv(2)
+
+        if ether is None:
+            raise RuntimeError(u"ICMP echo Rx timeout")
+
+        if ether.haslayer(ICMPv6ND_NS):
+            # read another packet in the queue if the current one is ICMPv6ND_NS
+            continue
+        if ether.haslayer(ICMPv6ND_RA):
+            # read another packet in the queue if the current one is ICMPv6ND_RA
+            continue
+        elif ether.haslayer(ICMPv6MLReport2):
+            # read another packet in the queue if the current one is
+            # ICMPv6MLReport2
+            continue
+
+        # otherwise process the current packet
+        break
 
     if rx_dst_mac == ether[Ether].dst and rx_src_mac == ether[Ether].src:
         print(u"MAC addresses match.")