Add Heavy Hitter to examples master (#10)

Add Heavy Hitter to SIGCOMM 2016 in master

SIGCOMM_2016/heavy_hitter/receive.py

@@ -0,0 +1,43 @@
+#!/usr/bin/python
+
+# Copyright 2013-present Barefoot Networks, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from scapy.all import sniff
+from scapy.all import IP, TCP
+
+VALID_IPS = ("10.0.0.1", "10.0.0.2", "10.0.0.3")
+totals = {}
+
+def handle_pkt(pkt):
+    if IP in pkt and TCP in pkt:
+        src_ip = pkt[IP].src
+        dst_ip = pkt[IP].dst
+        proto = pkt[IP].proto
+        sport = pkt[TCP].sport
+        dport = pkt[TCP].dport
+        id_tup = (src_ip, dst_ip, proto, sport, dport)
+        if src_ip in VALID_IPS:
+            if id_tup not in totals:
+                totals[id_tup] = 0
+            totals[id_tup] += 1
+            print ("Received from %s total: %s" %
+                    (id_tup, totals[id_tup]))
+
+def main():
+    sniff(iface = "eth0",
+          prn = lambda x: handle_pkt(x))
+
+if __name__ == '__main__':
+    main()