Vadim Yanitskiy | 7427baf | 2017-07-19 14:43:48 +0700 | [diff] [blame^] | 1 | #!/usr/bin/env python2 |
| 2 | # -*- coding: utf-8 -*- |
| 3 | |
| 4 | # GR-GSM based transceiver |
| 5 | # UDP link implementation |
| 6 | # |
| 7 | # (C) 2017 by Vadim Yanitskiy <axilirator@gmail.com> |
| 8 | # |
| 9 | # All Rights Reserved |
| 10 | # |
| 11 | # This program is free software; you can redistribute it and/or modify |
| 12 | # it under the terms of the GNU General Public License as published by |
| 13 | # the Free Software Foundation; either version 2 of the License, or |
| 14 | # (at your option) any later version. |
| 15 | # |
| 16 | # This program is distributed in the hope that it will be useful, |
| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | # GNU General Public License for more details. |
| 20 | # |
| 21 | # You should have received a copy of the GNU General Public License along |
| 22 | # with this program; if not, write to the Free Software Foundation, Inc., |
| 23 | # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 24 | |
| 25 | import socket |
| 26 | import select |
| 27 | |
| 28 | class UDPLink: |
| 29 | def __init__(self, remote_addr, remote_port, bind_port): |
| 30 | self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
| 31 | self.sock.bind(('0.0.0.0', bind_port)) |
| 32 | self.sock.setblocking(0) |
| 33 | |
| 34 | # Save remote info |
| 35 | self.remote_addr = remote_addr |
| 36 | self.remote_port = remote_port |
| 37 | |
| 38 | def loop(self): |
| 39 | r_event, w_event, x_event = select.select([self.sock], [], []) |
| 40 | |
| 41 | # Check for incoming data |
| 42 | if self.sock in r_event: |
| 43 | data, addr = self.sock.recvfrom(128) |
| 44 | self.handle_rx(data.decode()) |
| 45 | |
| 46 | def shutdown(self): |
| 47 | self.sock.close(); |
| 48 | |
| 49 | def send(self, data): |
| 50 | if type(data) not in [bytearray, bytes]: |
| 51 | data = data.encode() |
| 52 | |
| 53 | self.sock.sendto(data, (self.remote_addr, self.remote_port)) |
| 54 | |
| 55 | def handle_rx(self, data): |
| 56 | raise NotImplementedError |