1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
# Copyright 2021-2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
import asyncio
import logging
from bumble.transport.common import ParserSource, Transport
# -----------------------------------------------------------------------------
# Logging
# -----------------------------------------------------------------------------
logger = logging.getLogger(__name__)
# -----------------------------------------------------------------------------
async def open_udp_transport(spec: str) -> Transport:
'''
Open a UDP transport.
The parameter string has this syntax:
<local-host>:<local-port>,<remote-host>:<remote-port>
Example: 0.0.0.0:9000,127.0.0.1:9001
'''
class UdpPacketSource(asyncio.DatagramProtocol, ParserSource):
def datagram_received(self, data, addr):
self.parser.feed_data(data)
class UdpPacketSink:
def __init__(self, transport):
self.transport = transport
def on_packet(self, packet):
self.transport.sendto(packet)
def close(self):
self.transport.close()
local, remote = spec.split(',')
local_host, local_port = local.rsplit(':', maxsplit=1)
remote_host, remote_port = remote.rsplit(':', maxsplit=1)
(
udp_transport,
packet_source,
) = await asyncio.get_running_loop().create_datagram_endpoint(
UdpPacketSource,
local_addr=(local_host, int(local_port)),
remote_addr=(remote_host, int(remote_port)),
)
packet_sink = UdpPacketSink(udp_transport)
return Transport(packet_source, packet_sink)
|
