Track all connections (#175)

* adding to do for future refactor

* no mix conn and transport stopping or it will race

* don't use intermediary vars

libp2p/switch.nim

@@ -335,16 +335,16 @@ proc stop*(s: Switch) {.async.} =
   # we want to report erros but we do not want to fail
   # or crash here, cos we need to clean possibly MANY items
   # and any following conn/transport won't be cleaned up
-  var futs = newSeq[Future[void]]()
-
   if s.pubSub.isSome:
-    futs &= s.pubSub.get().stop()
+    await s.pubSub.get().stop()
 
-  futs &= toSeq(s.connections.values).mapIt(s.cleanupConn(it))
-  futs &= s.transports.mapIt(it.close())
+  checkFutures(
+    await allFinished(
+    toSeq(s.connections.values).mapIt(s.cleanupConn(it))))
 
-  futs = await allFinished(futs)
-  checkFutures(futs)
+  checkFutures(
+    await allFinished(
+    s.transports.mapIt(it.close())))
 
   trace "switch stopped"
 

libp2p/transports/tcptransport.nim

@@ -71,6 +71,7 @@ proc connHandler*(t: TcpTransport,
     if not isNil(t.handler):
       t.handlers &= t.handler(conn)
 
+  # TODO: store the streamtransport client here
   t.connections.add(conn)
   t.cleanups &= t.cleanup(conn)