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-rw-r--r--synapse/app/_base.py92
-rw-r--r--synapse/app/generic_worker.py34
-rw-r--r--synapse/app/homeserver.py42
3 files changed, 114 insertions, 54 deletions
diff --git a/synapse/app/_base.py b/synapse/app/_base.py
index 28062dd69d..f7b866978c 100644
--- a/synapse/app/_base.py
+++ b/synapse/app/_base.py
@@ -41,7 +41,12 @@ from typing_extensions import ParamSpec
 
 import twisted
 from twisted.internet import defer, error, reactor as _reactor
-from twisted.internet.interfaces import IOpenSSLContextFactory, IReactorSSL, IReactorTCP
+from twisted.internet.interfaces import (
+    IOpenSSLContextFactory,
+    IReactorSSL,
+    IReactorTCP,
+    IReactorUNIX,
+)
 from twisted.internet.protocol import ServerFactory
 from twisted.internet.tcp import Port
 from twisted.logger import LoggingFile, LogLevel
@@ -56,7 +61,7 @@ from synapse.app.phone_stats_home import start_phone_stats_home
 from synapse.config import ConfigError
 from synapse.config._base import format_config_error
 from synapse.config.homeserver import HomeServerConfig
-from synapse.config.server import ListenerConfig, ManholeConfig
+from synapse.config.server import ListenerConfig, ManholeConfig, TCPListenerConfig
 from synapse.crypto import context_factory
 from synapse.events.presence_router import load_legacy_presence_router
 from synapse.events.spamcheck import load_legacy_spam_checkers
@@ -351,6 +356,28 @@ def listen_tcp(
     return r  # type: ignore[return-value]
 
 
+def listen_unix(
+    path: str,
+    mode: int,
+    factory: ServerFactory,
+    reactor: IReactorUNIX = reactor,
+    backlog: int = 50,
+) -> List[Port]:
+    """
+    Create a UNIX socket for a given path and 'mode' permission
+
+    Returns:
+        list of twisted.internet.tcp.Port listening for TCP connections
+    """
+    wantPID = True
+
+    return [
+        # IReactorUNIX returns an object implementing IListeningPort from listenUNIX,
+        # but we know it will be a Port instance.
+        cast(Port, reactor.listenUNIX(path, factory, backlog, mode, wantPID))
+    ]
+
+
 def listen_http(
     listener_config: ListenerConfig,
     root_resource: Resource,
@@ -359,18 +386,13 @@ def listen_http(
     context_factory: Optional[IOpenSSLContextFactory],
     reactor: ISynapseReactor = reactor,
 ) -> List[Port]:
-    port = listener_config.port
-    bind_addresses = listener_config.bind_addresses
-    tls = listener_config.tls
-
     assert listener_config.http_options is not None
 
-    site_tag = listener_config.http_options.tag
-    if site_tag is None:
-        site_tag = str(port)
+    site_tag = listener_config.get_site_tag()
 
     site = SynapseSite(
-        "synapse.access.%s.%s" % ("https" if tls else "http", site_tag),
+        "synapse.access.%s.%s"
+        % ("https" if listener_config.is_tls() else "http", site_tag),
         site_tag,
         listener_config,
         root_resource,
@@ -378,25 +400,41 @@ def listen_http(
         max_request_body_size=max_request_body_size,
         reactor=reactor,
     )
-    if tls:
-        # refresh_certificate should have been called before this.
-        assert context_factory is not None
-        ports = listen_ssl(
-            bind_addresses,
-            port,
-            site,
-            context_factory,
-            reactor=reactor,
-        )
-        logger.info("Synapse now listening on TCP port %d (TLS)", port)
+
+    if isinstance(listener_config, TCPListenerConfig):
+        if listener_config.is_tls():
+            # refresh_certificate should have been called before this.
+            assert context_factory is not None
+            ports = listen_ssl(
+                listener_config.bind_addresses,
+                listener_config.port,
+                site,
+                context_factory,
+                reactor=reactor,
+            )
+            logger.info(
+                "Synapse now listening on TCP port %d (TLS)", listener_config.port
+            )
+        else:
+            ports = listen_tcp(
+                listener_config.bind_addresses,
+                listener_config.port,
+                site,
+                reactor=reactor,
+            )
+            logger.info("Synapse now listening on TCP port %d", listener_config.port)
+
     else:
-        ports = listen_tcp(
-            bind_addresses,
-            port,
-            site,
-            reactor=reactor,
+        ports = listen_unix(
+            listener_config.path, listener_config.mode, site, reactor=reactor
         )
-        logger.info("Synapse now listening on TCP port %d", port)
+        # getHost() returns a UNIXAddress which contains an instance variable of 'name'
+        # encoded as a byte string. Decode as utf-8 so pretty.
+        logger.info(
+            "Synapse now listening on Unix Socket at: "
+            f"{ports[0].getHost().name.decode('utf-8')}"
+        )
+
     return ports
 
 
diff --git a/synapse/app/generic_worker.py b/synapse/app/generic_worker.py
index 0dec24369a..e17ce35b8e 100644
--- a/synapse/app/generic_worker.py
+++ b/synapse/app/generic_worker.py
@@ -38,7 +38,7 @@ from synapse.app._base import (
 from synapse.config._base import ConfigError
 from synapse.config.homeserver import HomeServerConfig
 from synapse.config.logger import setup_logging
-from synapse.config.server import ListenerConfig
+from synapse.config.server import ListenerConfig, TCPListenerConfig
 from synapse.federation.transport.server import TransportLayerServer
 from synapse.http.server import JsonResource, OptionsResource
 from synapse.logging.context import LoggingContext
@@ -236,12 +236,18 @@ class GenericWorkerServer(HomeServer):
             if listener.type == "http":
                 self._listen_http(listener)
             elif listener.type == "manhole":
-                _base.listen_manhole(
-                    listener.bind_addresses,
-                    listener.port,
-                    manhole_settings=self.config.server.manhole_settings,
-                    manhole_globals={"hs": self},
-                )
+                if isinstance(listener, TCPListenerConfig):
+                    _base.listen_manhole(
+                        listener.bind_addresses,
+                        listener.port,
+                        manhole_settings=self.config.server.manhole_settings,
+                        manhole_globals={"hs": self},
+                    )
+                else:
+                    raise ConfigError(
+                        "Can not using a unix socket for manhole at this time."
+                    )
+
             elif listener.type == "metrics":
                 if not self.config.metrics.enable_metrics:
                     logger.warning(
@@ -249,10 +255,16 @@ class GenericWorkerServer(HomeServer):
                         "enable_metrics is not True!"
                     )
                 else:
-                    _base.listen_metrics(
-                        listener.bind_addresses,
-                        listener.port,
-                    )
+                    if isinstance(listener, TCPListenerConfig):
+                        _base.listen_metrics(
+                            listener.bind_addresses,
+                            listener.port,
+                        )
+                    else:
+                        raise ConfigError(
+                            "Can not use a unix socket for metrics at this time."
+                        )
+
             else:
                 logger.warning("Unsupported listener type: %s", listener.type)
 
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index b8830b1a9c..84236ac299 100644
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -44,7 +44,7 @@ from synapse.app._base import (
 )
 from synapse.config._base import ConfigError, format_config_error
 from synapse.config.homeserver import HomeServerConfig
-from synapse.config.server import ListenerConfig
+from synapse.config.server import ListenerConfig, TCPListenerConfig
 from synapse.federation.transport.server import TransportLayerServer
 from synapse.http.additional_resource import AdditionalResource
 from synapse.http.server import (
@@ -78,14 +78,13 @@ class SynapseHomeServer(HomeServer):
     DATASTORE_CLASS = DataStore  # type: ignore
 
     def _listener_http(
-        self, config: HomeServerConfig, listener_config: ListenerConfig
+        self,
+        config: HomeServerConfig,
+        listener_config: ListenerConfig,
     ) -> Iterable[Port]:
-        port = listener_config.port
         # Must exist since this is an HTTP listener.
         assert listener_config.http_options is not None
-        site_tag = listener_config.http_options.tag
-        if site_tag is None:
-            site_tag = str(port)
+        site_tag = listener_config.get_site_tag()
 
         # We always include a health resource.
         resources: Dict[str, Resource] = {"/health": HealthResource()}
@@ -252,12 +251,17 @@ class SynapseHomeServer(HomeServer):
                     self._listener_http(self.config, listener)
                 )
             elif listener.type == "manhole":
-                _base.listen_manhole(
-                    listener.bind_addresses,
-                    listener.port,
-                    manhole_settings=self.config.server.manhole_settings,
-                    manhole_globals={"hs": self},
-                )
+                if isinstance(listener, TCPListenerConfig):
+                    _base.listen_manhole(
+                        listener.bind_addresses,
+                        listener.port,
+                        manhole_settings=self.config.server.manhole_settings,
+                        manhole_globals={"hs": self},
+                    )
+                else:
+                    raise ConfigError(
+                        "Can not use a unix socket for manhole at this time."
+                    )
             elif listener.type == "metrics":
                 if not self.config.metrics.enable_metrics:
                     logger.warning(
@@ -265,10 +269,16 @@ class SynapseHomeServer(HomeServer):
                         "enable_metrics is not True!"
                     )
                 else:
-                    _base.listen_metrics(
-                        listener.bind_addresses,
-                        listener.port,
-                    )
+                    if isinstance(listener, TCPListenerConfig):
+                        _base.listen_metrics(
+                            listener.bind_addresses,
+                            listener.port,
+                        )
+                    else:
+                        raise ConfigError(
+                            "Can not use a unix socket for metrics at this time."
+                        )
+
             else:
                 # this shouldn't happen, as the listener type should have been checked
                 # during parsing