our consumers are async now, hurray
This commit is contained in:
Laura Klünder
parent
386bd3c888
commit
18144dde30
2 changed files with 155 additions and 131 deletions
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@ -1,7 +1,10 @@
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import asyncio
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import traceback
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from asyncio import get_event_loop
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from asgiref.sync import async_to_sync
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from channels.generic.websocket import JsonWebsocketConsumer, WebsocketConsumer
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from channels.db import database_sync_to_async
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from channels.generic.websocket import AsyncJsonWebsocketConsumer, AsyncWebsocketConsumer
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from django.db import transaction
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from django.utils import timezone
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@ -9,47 +12,51 @@ from c3nav.mesh import messages
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from c3nav.mesh.messages import (MESH_BROADCAST_ADDRESS, MESH_NONE_ADDRESS, MESH_ROOT_ADDRESS, MeshMessage,
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MeshMessageType)
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from c3nav.mesh.models import MeshNode, MeshUplink, NodeMessage
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from c3nav.mesh.tasks import send_channel_msg
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from c3nav.mesh.utils import get_mesh_comm_group
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# noinspection PyAttributeOutsideInit
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class MeshConsumer(WebsocketConsumer):
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def connect(self):
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# todo: auth
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class MeshConsumer(AsyncWebsocketConsumer):
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def __init__(self):
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super().__init__()
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self.uplink = None
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self.log_text(None, "new mesh websocket connection")
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self.dst_nodes = set()
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self.open_requests = set()
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self.accept()
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self.ping_task = None
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# todo: ping stuff
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async def connect(self):
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# todo: auth
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def disconnect(self, close_code):
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self.log_text(self.uplink.node, "mesh websocket disconnected")
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await self.log_text(None, "new mesh websocket connection")
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await self.accept()
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self.ping_task = get_event_loop().create_task(self.ping_regularly())
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async def disconnect(self, close_code):
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self.ping_task.cancel()
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await self.log_text(self.uplink.node, "mesh websocket disconnected")
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if self.uplink is not None:
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# leave broadcast group
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async_to_sync(self.channel_layer.group_discard)(
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await self.channel_layer.group_discard(
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get_mesh_comm_group(MESH_BROADCAST_ADDRESS), self.channel_name
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)
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# remove all other destinations
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self.remove_dst_nodes(self.dst_nodes)
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await self.remove_dst_nodes(self.dst_nodes)
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# set end reason (unless we set it to replaced already)
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MeshUplink.objects.filter(
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# todo: make this better? idk
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await MeshUplink.objects.filter(
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pk=self.uplink.pk,
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).exclude(
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end_reason=MeshUplink.EndReason.REPLACED
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).update(
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).aupdate(
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end_reason=MeshUplink.EndReason.CLOSED
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)
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def send_msg(self, msg, sender=None, exclude_uplink_address=None):
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async def send_msg(self, msg, sender=None, exclude_uplink_address=None):
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# print("sending", msg, MeshMessage.encode(msg).hex(' ', 1))
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# self.log_text(msg.dst, "sending %s" % msg)
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self.send(bytes_data=MeshMessage.encode(msg))
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async_to_sync(self.channel_layer.group_send)("mesh_msg_sent", {
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await self.send(bytes_data=MeshMessage.encode(msg))
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await self.channel_layer.group_send("mesh_msg_sent", {
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"type": "mesh.msg_sent",
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"timestamp": timezone.now().strftime("%d.%m.%y %H:%M:%S.%f"),
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"channel": self.channel_name,
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@ -59,7 +66,7 @@ class MeshConsumer(WebsocketConsumer):
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# "msg": msg.tojson(), # not doing this part for privacy reasons
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})
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def receive(self, text_data=None, bytes_data=None):
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async def receive(self, text_data=None, bytes_data=None):
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if bytes_data is None:
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return
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try:
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@ -75,14 +82,14 @@ class MeshConsumer(WebsocketConsumer):
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print('Received message for forwarding:', msg)
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if not self.uplink:
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self.log_text(None, "received message not for us before sign in message, ignoring...")
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await self.log_text(None, "received message not for us before sign in message, ignoring...")
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print('no sign in yet, ignoring')
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return
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# trace messages collect node adresses before forwarding
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if isinstance(msg, messages.MeshRouteTraceMessage):
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print('adding ourselves to trace message before forwarding')
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self.log_text(MESH_ROOT_ADDRESS, "adding ourselves to trace message before forwarding")
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await self.log_text(MESH_ROOT_ADDRESS, "adding ourselves to trace message before forwarding")
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msg.trace.append(MESH_ROOT_ADDRESS)
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msg.send(exclude_uplink_address=self.uplink.node.address)
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@ -90,74 +97,60 @@ class MeshConsumer(WebsocketConsumer):
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# don't handle this message unless it's a broadcast message
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if msg.dst != messages.MESH_BROADCAST_ADDRESS:
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# don't handle this message unless it's a broadcast message
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self.log_text(MESH_ROOT_ADDRESS, "received non-broadcast message not for us, forwarding...")
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await self.log_text(MESH_ROOT_ADDRESS, "received non-broadcast message not for us, forwarding...")
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return
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print('it\'s a broadcast so it\'s also for us')
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self.log_text(MESH_ROOT_ADDRESS, "received broadcast message, forwarding and handling...")
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await self.log_text(MESH_ROOT_ADDRESS, "received broadcast message, forwarding and handling...")
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# print('Received message:', msg)
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src_node, created = MeshNode.objects.get_or_create(address=msg.src)
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src_node, created = await MeshNode.objects.aget_or_create(address=msg.src)
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if isinstance(msg, messages.MeshSigninMessage):
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with transaction.atomic():
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# tatabase fumbling, lock the mesh node database row
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locked_node = MeshNode.objects.select_for_update().get(address=msg.src)
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await self.create_uplink_in_database(msg.src)
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# close other uplinks in the database (they might add their own close reason in a bit)
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locked_node.uplink_sessions.filter(end_reason__isnull=True).update(
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end_reason=MeshUplink.EndReason.NEW_TIMEOUT
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)
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# inform other uplinks to shut down
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await self.channel_layer.group_send(get_mesh_comm_group(msg.src), {
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"type": "mesh.uplink_consumer",
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"name": self.channel_name,
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})
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# create our own uplink in the database
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self.uplink = MeshUplink.objects.create(
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node=locked_node,
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last_ping=timezone.now(),
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name=self.channel_name,
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)
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# log message, since we will not log it further down
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await self.log_received_message(src_node, msg)
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# inform other uplinks to shut down
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async_to_sync(self.channel_layer.group_send)(get_mesh_comm_group(msg.src), {
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"type": "mesh.uplink_consumer",
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"name": self.channel_name,
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})
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# inform signed in uplink node about its layer
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await self.send_msg(messages.MeshLayerAnnounceMessage(
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src=messages.MESH_ROOT_ADDRESS,
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dst=msg.src,
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layer=messages.NO_LAYER
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))
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# log message, since we will not log it further down
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self.log_received_message(src_node, msg)
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# add signed in uplink node to broadcast group
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await self.channel_layer.group_add(
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get_mesh_comm_group(MESH_BROADCAST_ADDRESS), self.channel_name
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)
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# inform signed in uplink node about its layer
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self.send_msg(messages.MeshLayerAnnounceMessage(
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src=messages.MESH_ROOT_ADDRESS,
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dst=msg.src,
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layer=messages.NO_LAYER
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))
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# add signed in uplink node to broadcast group
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async_to_sync(self.channel_layer.group_add)(
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get_mesh_comm_group(MESH_BROADCAST_ADDRESS), self.channel_name
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)
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# add this node as a destination that this uplink handles (duh)
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self.add_dst_nodes(nodes=(src_node, ))
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# add this node as a destination that this uplink handles (duh)
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await self.add_dst_nodes(nodes=(src_node, ))
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return
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if self.uplink is None:
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print('Expected sign-in message, but got a different one!')
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self.close()
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await self.close()
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return
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self.log_received_message(src_node, msg)
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await self.log_received_message(src_node, msg)
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if isinstance(msg, messages.MeshAddDestinationsMessage):
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self.add_dst_nodes(addresses=msg.addresses)
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await self.add_dst_nodes(addresses=msg.addresses)
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if isinstance(msg, messages.MeshRemoveDestinationsMessage):
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self.remove_dst_nodes(addresses=msg.addresses)
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await self.remove_dst_nodes(addresses=msg.addresses)
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if isinstance(msg, messages.MeshRouteRequestMessage):
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if msg.address == MESH_ROOT_ADDRESS:
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self.log_text(MESH_ROOT_ADDRESS, "route request about us, start a trace")
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await self.log_text(MESH_ROOT_ADDRESS, "route request about us, start a trace")
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messages.MeshRouteTraceMessage(
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src=MESH_ROOT_ADDRESS,
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dst=msg.src,
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@ -166,50 +159,85 @@ class MeshConsumer(WebsocketConsumer):
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).send()
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else:
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# todo: find a way to send a "no route" message if there is no route
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self.log_text(MESH_ROOT_ADDRESS, "requesting route response responsible uplink")
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await self.log_text(MESH_ROOT_ADDRESS, "requesting route response responsible uplink")
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self.open_requests.add(msg.request_id)
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async_to_sync(self.channel_layer.group_send)(get_mesh_comm_group(msg.address), {
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await self.channel_layer.group_send(get_mesh_comm_group(msg.address), {
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"type": "mesh.send_route_response",
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"request_id": msg.request_id,
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"channel": self.channel_name,
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"dst": msg.src,
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})
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send_channel_msg.apply_async((self.channel_name, {
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await self.delayed_group_send(5, self.channel_name, {
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"type": "mesh.no_route_response",
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"request_id": msg.request_id,
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"dst": msg.src,
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}), countdown=5)
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})
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def mesh_uplink_consumer(self, data):
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# message handler: if we are not the given uplink, leave this group
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@database_sync_to_async
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def create_uplink_in_database(self, address):
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with transaction.atomic():
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# tatabase fumbling, lock the mesh node database row
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locked_node = MeshNode.objects.select_for_update().get(address=address)
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# close other uplinks in the database (they might add their own close reason in a bit)
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locked_node.uplink_sessions.filter(end_reason__isnull=True).update(
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end_reason=MeshUplink.EndReason.NEW_TIMEOUT
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)
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# create our own uplink in the database
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self.uplink = MeshUplink.objects.create(
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node=locked_node,
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last_ping=timezone.now(),
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name=self.channel_name,
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)
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async def ping_regularly(self):
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while True:
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await asyncio.sleep(5)
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await MeshUplink.objects.filter(pk=self.uplink.pk).aupdate(last_ping=timezone.now())
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async def delayed_group_send(self, delay: int, group: str, msg: dict):
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await asyncio.sleep(delay)
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await self.channel_layer.group_send(group, msg)
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"""
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internal event handlers
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"""
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async def mesh_uplink_consumer(self, data):
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"""
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message handler: if we are not the given uplink, leave this group
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"""
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if data["name"] != self.channel_name:
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self.log_text(self.uplink.node, "shutting down, uplink now served by new consumer")
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MeshUplink.objects.filter(pk=self.uplink.pk,).update(
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await self.log_text(self.uplink.node, "shutting down, uplink now served by new consumer")
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await MeshUplink.objects.filter(pk=self.uplink.pk,).aupdate(
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end_reason=MeshUplink.EndReason.REPLACED
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)
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self.close()
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await self.close()
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def mesh_dst_node_uplink(self, data):
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# message handler: if we are not the given uplink, leave this group
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async def mesh_dst_node_uplink(self, data):
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"""
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message handler: if we are not the given uplink, leave this group
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"""
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if data["uplink"] != self.uplink.node.address:
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self.log_text(data["address"], "node now served by new consumer")
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self.remove_dst_nodes((data["address"], ))
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await self.log_text(data["address"], "node now served by new consumer")
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await self.remove_dst_nodes((data["address"], ))
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def mesh_send(self, data):
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async def mesh_send(self, data):
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if self.uplink.node.address == data["exclude_uplink_address"]:
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if data["msg"]["dst"] == MESH_BROADCAST_ADDRESS:
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self.log_text(
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await self.log_text(
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self.uplink.node.address, "not forwarding this broadcast message via us since it came from here"
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)
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else:
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self.log_text(
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await self.log_text(
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self.uplink.node.address, "we're the route for this message but it came from here so... no"
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)
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return
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self.send_msg(MeshMessage.fromjson(data["msg"]), data["sender"])
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await self.send_msg(MeshMessage.fromjson(data["msg"]), data["sender"])
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def mesh_send_route_response(self, data):
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self.log_text(self.uplink.node.address, "we're the uplink for this address, sending route response...")
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async def mesh_send_route_response(self, data):
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await self.log_text(self.uplink.node.address, "we're the uplink for this address, sending route response...")
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messages.MeshRouteResponseMessage(
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src=MESH_ROOT_ADDRESS,
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dst=data["dst"],
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@ -221,10 +249,10 @@ class MeshConsumer(WebsocketConsumer):
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"request_id": data["request_id"],
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})
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def mesh_route_response_sent(self, data):
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async def mesh_route_response_sent(self, data):
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self.open_requests.discard(data["request_id"])
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def mesh_no_route_response(self, data):
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async def mesh_no_route_response(self, data):
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print('no route response check')
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if data["request_id"] not in self.open_requests:
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print('a route was sent')
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@ -237,25 +265,29 @@ class MeshConsumer(WebsocketConsumer):
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route=MESH_NONE_ADDRESS,
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).send()
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def log_received_message(self, src_node: MeshNode, msg: messages.MeshMessage):
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"""
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helper functions
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"""
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async def log_received_message(self, src_node: MeshNode, msg: messages.MeshMessage):
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as_json = MeshMessage.tojson(msg)
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async_to_sync(self.channel_layer.group_send)("mesh_msg_received", {
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await self.channel_layer.group_send("mesh_msg_received", {
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"type": "mesh.msg_received",
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"timestamp": timezone.now().strftime("%d.%m.%y %H:%M:%S.%f"),
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"channel": self.channel_name,
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"uplink": self.uplink.node.address if self.uplink else None,
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"msg": as_json,
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})
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NodeMessage.objects.create(
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await NodeMessage.objects.acreate(
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uplink=self.uplink,
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src_node=src_node,
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message_type=msg.msg_type.name,
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data=as_json,
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)
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def log_text(self, address, text):
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async def log_text(self, address, text):
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address = getattr(address, 'address', address)
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async_to_sync(self.channel_layer.group_send)("mesh_log", {
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await self.channel_layer.group_send("mesh_log", {
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"type": "mesh.log_entry",
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"timestamp": timezone.now().strftime("%d.%m.%y %H:%M:%S.%f"),
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"channel": self.channel_name,
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@ -265,7 +297,7 @@ class MeshConsumer(WebsocketConsumer):
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})
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print("MESH %s: [%s] %s" % (self.uplink.node, address, text))
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def add_dst_nodes(self, nodes=None, addresses=None):
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async def add_dst_nodes(self, nodes=None, addresses=None):
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nodes = list(nodes) if nodes else []
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addresses = set(addresses) if addresses else set()
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@ -273,7 +305,7 @@ class MeshConsumer(WebsocketConsumer):
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missing_addresses = addresses - set(node.address for node in nodes)
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if missing_addresses:
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MeshNode.objects.bulk_create(
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await MeshNode.objects.abulk_create(
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[MeshNode(address=address) for address in missing_addresses],
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ignore_conflicts=True
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)
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@ -282,25 +314,25 @@ class MeshConsumer(WebsocketConsumer):
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addresses |= missing_addresses
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for address in addresses:
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self.log_text(address, "destination added")
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await self.log_text(address, "destination added")
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# create group name for this address
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group = get_mesh_comm_group(address)
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# if we aren't handling this address yet, join the group
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if address not in self.dst_nodes:
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async_to_sync(self.channel_layer.group_add)(group, self.channel_name)
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await self.channel_layer.group_add(group, self.channel_name)
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self.dst_nodes.add(address)
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# tell other consumers to leave the group
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async_to_sync(self.channel_layer.group_send)(group, {
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await self.channel_layer.group_send(group, {
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"type": "mesh.dst_node_uplink",
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"node": address,
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"uplink": self.uplink.node.address
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})
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# tell the node to dump its current information
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self.send_msg(
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await self.send_msg(
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messages.ConfigDumpMessage(
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src=messages.MESH_ROOT_ADDRESS,
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dst=address,
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@ -308,43 +340,46 @@ class MeshConsumer(WebsocketConsumer):
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)
|
||||
|
||||
# add the stuff to the db as well
|
||||
MeshNode.objects.filter(address__in=addresses).update(
|
||||
await MeshNode.objects.filter(address__in=addresses).aupdate(
|
||||
uplink=self.uplink,
|
||||
last_signin=timezone.now(),
|
||||
)
|
||||
|
||||
def remove_dst_nodes(self, addresses):
|
||||
async def remove_dst_nodes(self, addresses):
|
||||
for address in tuple(addresses):
|
||||
self.log_text(address, "destination removed")
|
||||
await self.log_text(address, "destination removed")
|
||||
|
||||
# create group name for this address
|
||||
group = get_mesh_comm_group(address)
|
||||
|
||||
# leave the group
|
||||
if address in self.dst_nodes:
|
||||
async_to_sync(self.channel_layer.group_discard)(group, self.channel_name)
|
||||
await self.channel_layer.group_discard(group, self.channel_name)
|
||||
self.dst_nodes.discard(address)
|
||||
|
||||
# add the stuff to the db as well
|
||||
# todo: shouldn't do this because of race condition?
|
||||
MeshNode.objects.filter(address__in=addresses, uplink=self.uplink).update(uplink=None)
|
||||
await MeshNode.objects.filter(address__in=addresses, uplink=self.uplink).aupdate(uplink=None)
|
||||
|
||||
|
||||
class MeshUIConsumer(JsonWebsocketConsumer):
|
||||
def connect(self):
|
||||
# todo: auth
|
||||
self.accept()
|
||||
class MeshUIConsumer(AsyncJsonWebsocketConsumer):
|
||||
def __init__(self):
|
||||
super().__init__()
|
||||
self.msg_sent_filter = {}
|
||||
self.msg_received_filter = {}
|
||||
|
||||
def receive_json(self, content, **kwargs):
|
||||
async def connect(self):
|
||||
# todo: auth
|
||||
await self.accept()
|
||||
|
||||
async def receive_json(self, content, **kwargs):
|
||||
if content.get("subscribe", None) == "log":
|
||||
async_to_sync(self.channel_layer.group_add)("mesh_log", self.channel_name)
|
||||
await self.channel_layer.group_add("mesh_log", self.channel_name)
|
||||
if content.get("subscribe", None) == "msg_sent":
|
||||
async_to_sync(self.channel_layer.group_add)("mesh_msg_sent", self.channel_name)
|
||||
await self.channel_layer.group_add("mesh_msg_sent", self.channel_name)
|
||||
self.msg_sent_filter = dict(content.get("filter", {}))
|
||||
if content.get("subscribe", None) == "msg_received":
|
||||
async_to_sync(self.channel_layer.group_add)("mesh_msg_sent", self.channel_name)
|
||||
await self.channel_layer.group_add("mesh_msg_sent", self.channel_name)
|
||||
self.msg_received_filter = dict(content.get("filter", {}))
|
||||
if "send_msg" in content:
|
||||
msg_to_send = self.scope["session"].pop("mesh_msg_%s" % content["send_msg"], None)
|
||||
|
|
@ -352,11 +387,11 @@ class MeshUIConsumer(JsonWebsocketConsumer):
|
|||
return
|
||||
self.scope["session"].save()
|
||||
|
||||
async_to_sync(self.channel_layer.group_add)("mesh_msg_sent", self.channel_name)
|
||||
await self.channel_layer.group_add("mesh_msg_sent", self.channel_name)
|
||||
self.msg_sent_filter = {"sender": self.channel_name}
|
||||
|
||||
if msg_to_send["msg_data"]["msg_type"] == MeshMessageType.MESH_ROUTE_REQUEST.name:
|
||||
async_to_sync(self.channel_layer.group_add)("mesh_msg_received", self.channel_name)
|
||||
await self.channel_layer.group_add("mesh_msg_received", self.channel_name)
|
||||
self.msg_received_filter = {"request_id": msg_to_send["msg_data"]["request_id"]}
|
||||
|
||||
for recipient in msg_to_send["recipients"]:
|
||||
|
|
@ -365,10 +400,10 @@ class MeshUIConsumer(JsonWebsocketConsumer):
|
|||
**msg_to_send["msg_data"],
|
||||
}).send(sender=self.channel_name)
|
||||
|
||||
def mesh_log_entry(self, data):
|
||||
self.send_json(data)
|
||||
async def mesh_log_entry(self, data):
|
||||
await self.send_json(data)
|
||||
|
||||
def mesh_msg_sent(self, data):
|
||||
async def mesh_msg_sent(self, data):
|
||||
for key, value in self.msg_sent_filter.items():
|
||||
if isinstance(value, list):
|
||||
if data.get(key, None) not in value:
|
||||
|
|
@ -376,9 +411,9 @@ class MeshUIConsumer(JsonWebsocketConsumer):
|
|||
else:
|
||||
if data.get(key, None) != value:
|
||||
return
|
||||
self.send_json(data)
|
||||
await self.send_json(data)
|
||||
|
||||
def mesh_msg_received(self, data):
|
||||
async def mesh_msg_received(self, data):
|
||||
for key, filter_value in self.msg_received_filter.items():
|
||||
value = data.get(key, data["msg"].get(key, None))
|
||||
if isinstance(filter_value, list):
|
||||
|
|
@ -387,9 +422,9 @@ class MeshUIConsumer(JsonWebsocketConsumer):
|
|||
else:
|
||||
if value != filter_value:
|
||||
return
|
||||
self.send_json(data)
|
||||
await self.send_json(data)
|
||||
|
||||
def disconnect(self, code):
|
||||
async_to_sync(self.channel_layer.group_discard)("mesh_log", self.channel_name)
|
||||
async_to_sync(self.channel_layer.group_discard)("mesh_msg_sent", self.channel_name)
|
||||
async_to_sync(self.channel_layer.group_discard)("mesh_msg_received", self.channel_name)
|
||||
async def disconnect(self, code):
|
||||
await self.channel_layer.group_discard("mesh_log", self.channel_name)
|
||||
await self.channel_layer.group_discard("mesh_msg_sent", self.channel_name)
|
||||
await self.channel_layer.group_discard("mesh_msg_received", self.channel_name)
|
||||
|
|
|
|||
|
|
@ -1,11 +0,0 @@
|
|||
import channels
|
||||
from asgiref.sync import async_to_sync
|
||||
|
||||
from c3nav.celery import app
|
||||
|
||||
|
||||
@app.task(bind=True, max_retries=3)
|
||||
def send_channel_msg(self, layer, msg):
|
||||
# todo: this is… not ideal, is it?
|
||||
print("task sending channel msg...")
|
||||
async_to_sync(channels.layers.get_channel_layer().send)(layer, msg)
|
||||
Loading…
Add table
Add a link
Reference in a new issue