athenad: set a timeout on proxy WebSocket receive (#32336)

* useless

* Revert "useless"

This reverts commit 28f0bb9e9794d60eefba8063b47d8ca113308008.

* this forever hangs you disconnect (or 2 hours)

* same timeout as the global websocket

* Revert "same timeout as the global websocket"

This reverts commit 0bd0cb8a38a3e17960c1fae205311d86a9cf8feb.

* setting the timeout affects the entire websocket and disconnects, not just recv timeout

* fix that

* fix test
old-commit-hash: 09aeab3f77727a1e2ba25e1cf14a56882b4e5e29

selfdrive/athena/athenad.py

@@ -657,10 +657,12 @@ def stat_handler(end_event: threading.Event) -> None:
 def ws_proxy_recv(ws: WebSocket, local_sock: socket.socket, ssock: socket.socket, end_event: threading.Event, global_end_event: threading.Event) -> None:
   while not (end_event.is_set() or global_end_event.is_set()):
     try:
-      data = ws.recv()
-      if isinstance(data, str):
-        data = data.encode("utf-8")
-      local_sock.sendall(data)
+      r = select.select((ws.sock,), (), (), 30)
+      if r[0]:
+        data = ws.recv()
+        if isinstance(data, str):
+          data = data.encode("utf-8")
+        local_sock.sendall(data)
     except WebSocketTimeoutException:
       pass
     except Exception:
@@ -670,6 +672,7 @@ def ws_proxy_recv(ws: WebSocket, local_sock: socket.socket, ssock: socket.socket
   cloudlog.debug("athena.ws_proxy_recv closing sockets")
   ssock.close()
   local_sock.close()
+  ws.close()
   cloudlog.debug("athena.ws_proxy_recv done closing sockets")
 
   end_event.set()

selfdrive/athena/tests/helpers.py

@@ -43,6 +43,8 @@ class MockApi():
 
 
 class MockWebsocket():
+  sock = socket.socket()
+
   def __init__(self, recv_queue, send_queue):
     self.recv_queue = recv_queue
     self.send_queue = send_queue
@@ -56,6 +58,9 @@ class MockWebsocket():
   def send(self, data, opcode):
     self.send_queue.put_nowait((data, opcode))
 
+  def close(self):
+    pass
+
 
 class HTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
   def do_PUT(self):