# # This file is licensed under the Affero General Public License (AGPL) version 3. # # Copyright (C) 2023 New Vector, Ltd # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as # published by the Free Software Foundation, either version 3 of the # License, or (at your option) any later version. # # See the GNU Affero General Public License for more details: # . # # Originally licensed under the Apache License, Version 2.0: # . # # [This file includes modifications made by New Vector Limited] # # import logging import sys from typing import Container from synapse.util import check_dependencies logger = logging.getLogger(__name__) try: check_dependencies.check_requirements() except check_dependencies.DependencyException as e: sys.stderr.writelines( e.message # noqa: B306, DependencyException.message is a property ) sys.exit(1) def check_bind_error( e: Exception, address: str, bind_addresses: Container[str] ) -> None: """ This method checks an exception occurred while binding on 0.0.0.0. If :: is specified in the bind addresses a warning is shown. The exception is still raised otherwise. Binding on both 0.0.0.0 and :: causes an exception on Linux and macOS because :: binds on both IPv4 and IPv6 (as per RFC 3493). When binding on 0.0.0.0 after :: this can safely be ignored. Args: e: Exception that was caught. address: Address on which binding was attempted. bind_addresses: Addresses on which the service listens. """ if address == "0.0.0.0" and "::" in bind_addresses: logger.warning( "Failed to listen on 0.0.0.0, continuing because listening on [::]" ) else: raise e