esp8266/modules/webrepl: Enforce only one concurrent WebREPL connection.

Paul Sokolovsky · Paul Sokolovsky · commit 3f251efb9bb2 · 2016-10-20T16:50:38.000+03:00
Concurrent WebREPL connections were never supported, now actually check
for this.
diff --git a/esp8266/modules/webrepl.py b/esp8266/modules/webrepl.py
@@ -31,6 +31,10 @@ def setup_conn(port, accept_handler):
 def accept_conn(listen_sock):
     global client_s
     cl, remote_addr = listen_sock.accept()
+    if uos.dupterm():
+        print("\nConcurrent WebREPL connection from", remote_addr, "rejected")
+        cl.close()
+        return
     print("\nWebREPL connection from:", remote_addr)
     client_s = cl
     websocket_helper.server_handshake(cl)
