diff --git a/lib/tunnelbroker/tunnelbroker-context.js b/lib/tunnelbroker/tunnelbroker-context.js
index 05fe2bf19..a2f20febd 100644
--- a/lib/tunnelbroker/tunnelbroker-context.js
+++ b/lib/tunnelbroker/tunnelbroker-context.js
@@ -1,107 +1,158 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 
 import { tunnnelbrokerURL } from '../facts/tunnelbroker.js';
-import { type TunnelbrokerMessage } from '../types/tunnelbroker/messages.js';
+import type { MessageReceiveConfirmation } from '../types/tunnelbroker/message-receive-confirmation-types.js';
+import {
+  type TunnelbrokerMessage,
+  tunnelbrokerMessageTypes,
+  tunnelbrokerMessageValidator,
+} from '../types/tunnelbroker/messages.js';
 import type { ConnectionInitializationMessage } from '../types/tunnelbroker/session-types.js';
 
 export type ClientMessageToDevice = {
   +deviceID: string,
   +payload: string,
 };
 
 export type TunnelbrokerSocketListener = (
   message: TunnelbrokerMessage,
 ) => mixed;
 
 type TunnelbrokerContextType = {
   +sendMessage: (message: ClientMessageToDevice) => Promise<void>,
   +addListener: (listener: TunnelbrokerSocketListener) => void,
   +removeListener: (listener: TunnelbrokerSocketListener) => void,
   +connected: boolean,
 };
 
 const TunnelbrokerContext: React.Context<?TunnelbrokerContextType> =
   React.createContext<?TunnelbrokerContextType>();
 
 type Props = {
   +children: React.Node,
   +initMessage: ?ConnectionInitializationMessage,
 };
 
 function TunnelbrokerProvider(props: Props): React.Node {
   const { children, initMessage } = props;
   const [connected, setConnected] = React.useState(false);
   const listeners = React.useRef<Set<TunnelbrokerSocketListener>>(new Set());
   const socket = React.useRef<?WebSocket>(null);
 
   React.useEffect(() => {
     if (connected || !initMessage) {
       return;
     }
 
     const tunnelbrokerSocket = new WebSocket(tunnnelbrokerURL);
 
     tunnelbrokerSocket.onopen = () => {
       tunnelbrokerSocket.send(JSON.stringify(initMessage));
     };
 
     tunnelbrokerSocket.onclose = () => {
       setConnected(false);
-      console.error('Connection to Tunnelbroker closed');
+      console.log('Connection to Tunnelbroker closed');
     };
     tunnelbrokerSocket.onerror = e => {
-      console.error('Tunnelbroker socket error:', e.message);
+      console.log('Tunnelbroker socket error:', e.message);
     };
     tunnelbrokerSocket.onmessage = (event: MessageEvent) => {
-      console.log('Received message:', event.data);
+      if (typeof event.data !== 'string') {
+        console.log('socket received a non-string message');
+        return;
+      }
+      let rawMessage;
+      try {
+        rawMessage = JSON.parse(event.data);
+      } catch (e) {
+        console.log('error while parsing Tunnelbroker message:', e.message);
+        return;
+      }
+
+      if (!tunnelbrokerMessageValidator.is(rawMessage)) {
+        console.log('invalid TunnelbrokerMessage');
+        return;
+      }
+      const message: TunnelbrokerMessage = rawMessage;
+
+      for (const listener of listeners.current) {
+        listener(message);
+      }
+
+      if (
+        message.type ===
+        tunnelbrokerMessageTypes.CONNECTION_INITIALIZATION_RESPONSE
+      ) {
+        if (message.status.type === 'Success' && !connected) {
+          setConnected(true);
+          console.log('session with Tunnelbroker created');
+        } else if (message.status.type === 'Success' && connected) {
+          console.log(
+            'received ConnectionInitializationResponse with status: Success for already connected socket',
+          );
+        } else {
+          setConnected(false);
+          console.log(
+            'creating session with Tunnelbroker error:',
+            message.status.data,
+          );
+        }
+      } else if (message.type === tunnelbrokerMessageTypes.MESSAGE_TO_DEVICE) {
+        const confirmation: MessageReceiveConfirmation = {
+          type: tunnelbrokerMessageTypes.MESSAGE_RECEIVE_CONFIRMATION,
+          messageIDs: [message.messageID],
+        };
+        socket.current?.send(JSON.stringify(confirmation));
+      }
     };
 
     socket.current = tunnelbrokerSocket;
   }, [connected, initMessage]);
 
   const sendMessage: () => Promise<void> = React.useCallback(() => {
     return new Promise(() => {});
   }, []);
 
   const addListener = React.useCallback(
     (listener: TunnelbrokerSocketListener) => {
       listeners.current.add(listener);
     },
     [],
   );
 
   const removeListener = React.useCallback(
     (listener: TunnelbrokerSocketListener) => {
       listeners.current.delete(listener);
     },
     [],
   );
 
   const value: TunnelbrokerContextType = React.useMemo(
     () => ({
       sendMessage,
       connected,
       addListener,
       removeListener,
     }),
     [addListener, connected, removeListener, sendMessage],
   );
 
   return (
     <TunnelbrokerContext.Provider value={value}>
       {children}
     </TunnelbrokerContext.Provider>
   );
 }
 
 function useTunnelbroker(): TunnelbrokerContextType {
   const context = React.useContext(TunnelbrokerContext);
   invariant(context, 'TunnelbrokerContext not found');
 
   return context;
 }
 
 export { TunnelbrokerProvider, useTunnelbroker };