net/usrsock: Add events to usrsock

Add USRSOCK_EVENT_CONNECTED and USRSOCK_EVENT_LISTENING events.
In the case where the Host side turns off power while the
communication device side has opened the socket,
it is necessary to recover the socket that has already been
opened after the Host side turns on power.
These events are necessary for this process, so add these events.

include/nuttx/net/usrsock.h

@@ -45,6 +45,8 @@
 #define USRSOCK_EVENT_SENDTO_READY   (1 << 2)
 #define USRSOCK_EVENT_RECVFROM_AVAIL (1 << 3)
 #define USRSOCK_EVENT_REMOTE_CLOSED  (1 << 4)
+#define USRSOCK_EVENT_CONNECTED      (1 << 5)
+#define USRSOCK_EVENT_LISTENING      (1 << 6)
 
 /* Response message flags */
 

net/usrsock/usrsock_event.c

@@ -100,6 +100,16 @@ int usrsock_event(FAR struct usrsock_conn_s *conn)
         {
           conn->flags |= USRSOCK_EVENT_RECVFROM_AVAIL;
         }
+
+      if (events & USRSOCK_EVENT_CONNECTED)
+        {
+          conn->connected = true;
+        }
+
+      if (events & USRSOCK_EVENT_LISTENING)
+        {
+          conn->sconn.s_flags |= _SF_LISTENING;
+        }
     }
 
   if (events & USRSOCK_EVENT_REMOTE_CLOSED)