| # Copyright 2019 The Bazel Authors. All rights reserved. |
| # |
| # 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 |
| # |
| # http://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. |
| """Simple replaying Unix Domain Socket (UDS) server.""" |
| |
| import contextlib |
| import select |
| import socket |
| import sys |
| import threading |
| |
| |
| def main(argv=None): |
| if argv is None: |
| argv = sys.argv[1:] |
| |
| srv_address = argv[0] |
| dst_host, dst_port = argv[1].split(":") |
| dst_address = (dst_host, int(dst_port)) |
| |
| srv_sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) |
| srv_sock.bind(srv_address) |
| srv_sock.listen(64) |
| while True: |
| src_sock, _ = srv_sock.accept() |
| proxy_thread = threading.Thread(target=proxy, args=[src_sock, dst_address]) |
| proxy_thread.daemon = True |
| proxy_thread.start() |
| |
| |
| def proxy(src_sock, dst_address): |
| """Read data from a USD socket and write it back.""" |
| with contextlib.closing(src_sock): |
| src_sock.settimeout(None) |
| dst_sock = socket.create_connection(dst_address) |
| with contextlib.closing(dst_sock): |
| dst_sock.settimeout(None) |
| |
| while True: |
| readable, _, _ = select.select([src_sock, dst_sock], [], []) |
| if src_sock in readable: |
| data = src_sock.recv(4096) |
| if not data: |
| return |
| dst_sock.sendall(data) |
| if dst_sock in readable: |
| data = dst_sock.recv(4096) |
| if data: |
| src_sock.sendall(data) |
| |
| |
| if __name__ == "__main__": |
| sys.exit(main()) |