python2 and removed netifaces dependency for pi compatibility

requirements.txt

@@ -1,5 +1,4 @@
 tqdm==4.26.0
 pymediainfo==2.3.0
 colorlog==3.1.4
-netifaces==0.10.7
 tornado==5.1.1

src/videowall/networking/networking_client.py

@@ -55,6 +55,8 @@ def receive_server_play_broadcast(self):
         # May raise a socket.timeout exception
         data, _ = self._server_play_broadcast_socket.recvfrom(self._buffer_size)
 
+        print(data)
+
         try:
             msg = ServerPlayBroadcastMessage(**json.loads(data.decode("utf-8")))
         except Exception as e:

src/videowall/util.py

@@ -1,10 +1,10 @@
 import argparse
-import base64
-import netifaces as ni
+import fcntl
 import os
 import re
 import socket
 import string
+import struct
 
 
 def to_dict(obj):
@@ -70,11 +70,16 @@ def validate_positive_or_zero_int_argument(value):
 
 
 def get_ifnames():
-    return ni.interfaces()
+    return os.listdir('/sys/class/net/')
 
 
 def ip_from_ifname(ifname):
-    return ni.ifaddresses(ifname)[ni.AF_INET][0]['addr']
+    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    return socket.inet_ntoa(fcntl.ioctl(
+        s.fileno(),
+        0x8915,  # SIOCGIFADDR
+        struct.pack('256s', ifname[:15])
+    )[20:24])
 
 
 def get_unique_filename(path):

test/test_media_manager_server

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 import logging
 from argparse import ArgumentParser
 

test/test_networking_client

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 
 import logging
 from argparse import ArgumentParser

test/test_networking_server

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 import json
 import logging
 import time