Send device messages over federation

1 files changed, 121 insertions, 0 deletions

diff --git a/synapse/handlers/devicemessage.py b/synapse/handlers/devicemessage.py
new file mode 100644
index 0000000000..7e59c0d487
--- /dev/null
+++ b/synapse/handlers/devicemessage.py
@@ -0,0 +1,121 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016 OpenMarket Ltd
+#
+# 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.
+
+import logging
+
+from twisted.internet import defer
+
+from synapse.types import get_domain_from_id
+from synapse.util.stringutils import random_string
+
+
+logger = logging.getLogger(__name__)
+
+
+class DeviceMessageHandler(object):
+
+    def __init__(self, hs):
+        """
+        Args:
+            hs (synapse.server.HomeServer): server
+        """
+        self.store = hs.get_datastore()
+        self.notifier = hs.get_notifier()
+        self.is_mine_id = hs.is_mine_id
+        self.federation = hs.get_replication_layer()
+
+        self.federation.register_edu_handler(
+            "m.direct_to_device", self.on_direct_to_device_edu
+        )
+
+    @defer.inlineCallbacks
+    def on_direct_to_device_edu(self, origin, content):
+        local_messages = {}
+        sender_user_id = content["sender"]
+        if origin != get_domain_from_id(sender_user_id):
+            logger.warn(
+                "Dropping device message from %r with spoofed sender %r",
+                origin, sender_user_id
+            )
+        message_type = content["type"]
+        message_id = content["message_id"]
+        for user_id, by_device in content["messages"].items():
+            messages_by_device = {
+                device_id: {
+                    "content": message_content,
+                    "type": message_type,
+                    "sender": sender_user_id,
+                }
+                for device_id, message_content in by_device.items()
+            }
+            if messages_by_device:
+                local_messages[user_id] = messages_by_device
+
+        stream_id = yield self.store.add_messages_from_remote_to_device_inbox(
+            origin, message_id, local_messages
+        )
+
+        self.notifier.on_new_event(
+            "to_device_key", stream_id, users=local_messages.keys()
+        )
+
+    @defer.inlineCallbacks
+    def send_device_message(self, sender_user_id, message_type, messages):
+
+        local_messages = {}
+        remote_messages = {}
+        for user_id, by_device in messages.items():
+            if self.is_mine_id(user_id):
+                messages_by_device = {
+                    device_id: {
+                        "content": message_content,
+                        "type": message_type,
+                        "sender": sender_user_id,
+                    }
+                    for device_id, message_content in by_device.items()
+                }
+                if messages_by_device:
+                    local_messages[user_id] = messages_by_device
+            else:
+                destination = get_domain_from_id(user_id)
+                remote_messages.setdefault(destination, {})[user_id] = by_device
+
+        message_id = random_string(16)
+
+        remote_edu_contents = {}
+        for destination, messages in remote_messages.items():
+            remote_edu_contents[destination] = {
+                "messages": messages,
+                "sender": sender_user_id,
+                "type": message_type,
+                "message_id": message_id,
+            }
+
+        stream_id = yield self.store.add_messages_to_device_inbox(
+            local_messages, remote_edu_contents
+        )
+
+        self.notifier.on_new_event(
+            "to_device_key", stream_id, users=local_messages.keys()
+        )
+
+        for destination in remote_messages.keys():
+            # Hack to send make synapse send a federation transaction
+            # to the remote servers.
+            self.federation.send_edu(
+                destination=destination,
+                edu_type="m.ping",
+                content={},
+            )