added 3 bmv2 examples: copy_to_cpu, meter, TLV_parsing

examples/meter/send_and_receive.py

@@ -0,0 +1,44 @@
+from scapy.all import *
+import sys
+import threading
+
+
+big_lock = threading.Lock()
+
+
+class Receiver(threading.Thread):
+    def __init__(self):
+        threading.Thread.__init__(self)
+        self.daemon = True
+
+    def received(self, p):
+        big_lock.acquire()
+        print "Received one"
+        big_lock.release()
+
+    def run(self):
+        sniff(iface="veth2", prn=lambda x: self.received(x))
+
+
+def main():
+    try:
+        packet_int = int(sys.argv[1])
+        print "Sending packet with interval", packet_int
+    except:
+        print "Usage: sudo python send_and_receive.py <packet_int (seconds)>"
+        sys.exit(1)
+
+    Receiver().start()
+
+    p = Ether(src="aa:aa:aa:aa:aa:aa") / IP(dst="10.0.1.10") / TCP() / "aaaaaaaaaaaaaaaaaaa"
+
+    while True:
+        big_lock.acquire()
+        sendp(p, iface="veth0", verbose=0)
+        print "Sent one"
+        big_lock.release()
+        time.sleep(packet_int)
+
+
+if __name__ == '__main__':
+    main()