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