Adding peer retreiver example script

peer_retreiver.py

@@ -0,0 +1,44 @@
+import sys
+import socket
+from levin.section import Section
+from levin.bucket import Bucket
+from levin.ctypes import *
+from levin.constants import *
+
+args = sys.argv
+if len(args) != 3:
+    print('./%s ip port')
+    sys.exit()
+
+host, ip = args[1], int(args[2])
+
+try:
+    sock = socket.socket()
+    sock.connect((host, ip))
+except:
+    sys.stderr.write("unable to connect to %s:%d\n" % (host, ip))
+    sys.exit()
+
+bucket = Bucket.create_handshake_request()
+
+sock.send(bucket.header())
+sock.send(bucket.payload())
+print(">> sent packet \'%s\'" % P2P_COMMANDS[bucket.command])
+
+buckets = []
+
+while 1:
+    buffer = sock.recv(8)
+
+    if buffer.startswith(bytes(LEVIN_SIGNATURE)):
+        bucket = Bucket.from_buffer(signature=buffer, sock=sock)
+        buckets.append(bucket)
+
+        if bucket.command == 1001:
+            peers = bucket.get_peers()
+
+            for peer in peers:
+                print('%s:%d' % (peer['ip'].ipv4, peer['port'].value))
+
+            sock.close()
+            break