Moved trx utilities from apps subdirectory - the grgsm_trx app need to be updated
diff --git a/python/trx/udp_link.py b/python/trx/udp_link.py
new file mode 100644
index 0000000..0d90ec9
--- /dev/null
+++ b/python/trx/udp_link.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# GR-GSM based transceiver
+# UDP link implementation
+#
+# (C) 2017 by Vadim Yanitskiy <axilirator@gmail.com>
+#
+# All Rights Reserved
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import socket
+import select
+
+class UDPLink:
+ def __init__(self, remote_addr, remote_port, bind_port):
+ self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+ self.sock.bind(('0.0.0.0', bind_port))
+ self.sock.setblocking(0)
+
+ # Save remote info
+ self.remote_addr = remote_addr
+ self.remote_port = remote_port
+
+ def loop(self):
+ r_event, w_event, x_event = select.select([self.sock], [], [])
+
+ # Check for incoming data
+ if self.sock in r_event:
+ data, addr = self.sock.recvfrom(128)
+ self.handle_rx(data.decode())
+
+ def shutdown(self):
+ self.sock.close();
+
+ def send(self, data):
+ if type(data) not in [bytearray, bytes]:
+ data = data.encode()
+
+ self.sock.sendto(data, (self.remote_addr, self.remote_port))
+
+ def handle_rx(self, data):
+ raise NotImplementedError