Add Python library (#20)

tools/pyflix/proxy.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+"""Proxy for running pyflix library alongside QGroundControl app."""
+
+import socket
+
+LOCAL = ('0.0.0.0', 14550)  # from Flix
+TARGETS = (
+    ('127.0.0.1', 14560),  # to QGroundControl
+    ('127.0.0.1', 14555),  # to pyflix
+)
+
+def main():
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    sock.bind(LOCAL)
+
+    source_addr = None
+    packets = 0
+
+    print('Proxy started - run QGroundControl')
+
+    while True:
+        data, addr = sock.recvfrom(1024)  # read entire UDP packet
+        if addr in TARGETS:  # packet from target
+            if source_addr is None:
+                continue
+            sock.sendto(data, source_addr)
+        else:  # packet from source
+            source_addr = addr
+            for target in TARGETS:
+                sock.sendto(data, target)
+
+        packets += 1
+        print(f'\rPackets: {packets}', end='')
+
+if __name__ == '__main__':
+    main()