| """ |
| Copyright (c) 2024, The OpenThread Authors. |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| 3. Neither the name of the copyright holder nor the |
| names of its contributors may be used to endorse or promote products |
| derived from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
| """ |
| |
| from itertools import count, takewhile |
| from typing import Iterator |
| import logging |
| import time |
| from asyncio import sleep |
| import socket |
| |
| logger = logging.getLogger(__name__) |
| |
| |
| class UdpStream: |
| BASE_PORT = 10000 |
| |
| def __init__(self, address, node_id): |
| self.__receive_buffer = b'' |
| self.__last_recv_time = None |
| self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
| self.address = (address, self.BASE_PORT + node_id) |
| |
| async def send(self, data): |
| logger.debug(f'sending {data}') |
| self.socket.sendto(data, self.address) |
| return len(data) |
| |
| async def recv(self, bufsize): |
| message = self.socket.recv(bufsize) |
| logger.debug(f'retrieved {message}') |
| return message |