Raw sockets: Various fixes for closing, free connections, TX from Daniel Lazo Sitzer

net/socket.c

@@ -164,14 +164,27 @@ int psock_socket(int domain, int type, int protocol, FAR struct socket *psock)
 #ifdef CONFIG_NET_PKT
       case SOCK_RAW:
         {
+          /* Allocate the packet socket connection structure and save
+           * in the new socket instance.
+           */
+
           struct uip_pkt_conn *conn = uip_pktalloc();
-          if (conn)
+          if (!conn)
             {
+              /* Failed to reserve a connection structure */
+
+              goto errout;
+            }
+
+          /* Set the reference count on the connection structure.  This
+           * reference count will be increment only if the socket is
+           * dup'ed
+           */
+
           DEBUGASSERT(conn->crefs == 0);
           psock->s_conn = conn;
           conn->crefs   = 1;
         }
-        }
         break;
 #endif
 

net/uip/uip_poll.c

@@ -85,7 +85,7 @@ static int uip_pollpktconnections(struct uip_driver_s *dev,
 
       /* Call back into the driver */
 
-      callback(dev);
+      bstop = callback(dev);
     }
 
   return bstop;