diff --git a/apps/sdlan/src/sdlan_network.erl b/apps/sdlan/src/sdlan_network.erl
index 9e1198e..bcbf1d3 100644
--- a/apps/sdlan/src/sdlan_network.erl
+++ b/apps/sdlan/src/sdlan_network.erl
@@ -353,14 +353,14 @@ handle_cast({forward, Sock, SrcMac, DstMac, Packet}, State = #state{network_id =
                 error ->
                     PacketBytes = byte_size(Packet),
                     %% 消息广播
-                    maps:foreach(fun(Mac, #endpoint{hole = Hole}) ->
-                        case {Mac =/= SrcMac, Hole} of
-                            {true, #hole{peer = {NatIp, NatPort}}} ->
+                    broadcast(fun(#endpoint{hole = Hole}) ->
+                        case Hole of
+                            #hole{peer = {NatIp, NatPort}} ->
                                 gen_udp:send(Sock, NatIp, NatPort, Packet);
                             _ ->
                                 ok
                         end
-                                 end, Endpoints),
+                              end, [SrcMac], Endpoints),
 
                     %% client和stun之间必须有心跳机制保持nat映射可用，并且通过服务转发的udp包肯定可以到达对端的nat
                     lager:debug("[sdlan_network] broadcast data networkd_id: ~p, src_mac: ~p, dst_mac: ~p",
@@ -401,7 +401,15 @@ handle_cast({update_hole, ClientId, Mac, Peer, NatType, V6Info}, State = #state{
                         mac = Mac,
                         ip = Ip
                     }),
-                    broadcast(?PACKET_EVENT_NAT_CHANGED, NatChangedEvent, Mac, Endpoints);
+
+                    broadcast(fun(#endpoint{channel_pid = ChannelPid}) ->
+                        case is_process_alive(ChannelPid) of
+                            true ->
+                                sdlan_channel:send_event(ChannelPid, ?PACKET_EVENT_NAT_CHANGED, NatChangedEvent);
+                            false ->
+                                ok
+                        end
+                              end, [Mac], Endpoints);
                 false ->
                     ok
             end,
@@ -423,9 +431,22 @@ handle_info({timeout, _, flow_report_ticker}, State = #state{network_id = Networ
     catch sdlan_api:network_forward_report(NetworkId, ForwardBytes),
     {noreply, State#state{forward_bytes = 0}};
 
-handle_info({'EXIT', _Pid, shutdown}, State = #state{network_id = NetworkId, endpoints = UsedMap}) ->
+handle_info({'EXIT', _Pid, shutdown}, State = #state{network_id = NetworkId, endpoints = Endpoints}) ->
     lager:warning("[sdlan_network] network: ~p, get shutdown message", [NetworkId]),
-    broadcast_shutdown(UsedMap),
+
+    NetworkShutdownEvent = sdlan_pb:encode_msg(#sdl_network_shutdown_event {
+        message = <<"Network shutdown">>
+    }),
+    broadcast(fun(#endpoint{channel_pid = ChannelPid}) ->
+        case is_pid(ChannelPid) andalso is_process_alive(ChannelPid) of
+            true ->
+                sdlan_channel:send_event(ChannelPid, ?PACKET_EVENT_NETWORK_SHUTDOWN, NetworkShutdownEvent),
+                sdlan_channel:stop(ChannelPid, normal);
+            false ->
+                ok
+        end
+              end, Endpoints),
+
     {stop, shutdown, State};
 %% Channel进程退出, hole里面的数据也需要清理
 handle_info({'DOWN', _MRef, process, ChannelPid, Reason}, State = #state{network_id = NetworkId, endpoints = Endpoints}) ->
@@ -442,12 +463,20 @@ handle_info({'DOWN', _MRef, process, ChannelPid, Reason}, State = #state{network
     State :: #state{}) -> term()).
 terminate(Reason, #state{network_id = NetworkId, endpoints = Endpoints}) ->
     lager:debug("[sdlan_network] network: ~p, will terminate with reason: ~p", [NetworkId, Reason]),
-    broadcast_shutdown(Endpoints),
-    %% 整个网络下的设备都需要重新连接
-    maps:foreach(fun(_, #endpoint{channel_pid = ChannelPid, monitor_ref = MRef}) ->
+
+    NetworkShutdownEvent = sdlan_pb:encode_msg(#sdl_network_shutdown_event {
+        message = <<"Network shutdown">>
+    }),
+    broadcast(fun(#endpoint{channel_pid = ChannelPid, monitor_ref = MRef}) ->
         is_reference(MRef) andalso demonitor(MRef),
-        is_process_alive(ChannelPid) andalso sdlan_channel:stop(ChannelPid, normal)
-                 end, Endpoints),
+        case is_pid(ChannelPid) andalso is_process_alive(ChannelPid) of
+            true ->
+                sdlan_channel:send_event(ChannelPid, ?PACKET_EVENT_NETWORK_SHUTDOWN, NetworkShutdownEvent),
+                sdlan_channel:stop(ChannelPid, normal);
+            false ->
+                ok
+        end
+              end, Endpoints),
     ok.
 
 %% @private
@@ -502,30 +531,20 @@ maybe_close_channel(#endpoint{channel_pid = ChannelPid0, monitor_ref = MRef0}) -
 maybe_close_channel(_) ->
     ok.
 
--spec broadcast(EventType :: integer(), Event :: binary(), ExcludeMac :: binary(), UsedMap :: map()) -> no_return().
-broadcast(EventType, Event, ExcludeMac, UsedMap) when is_map(UsedMap), is_binary(ExcludeMac), is_integer(EventType), is_binary(Event) ->
-    maps:foreach(fun(Mac, #endpoint{channel_pid = ChannelPid}) ->
-        case is_process_alive(ChannelPid) andalso ExcludeMac /= Mac of
-            true ->
-                sdlan_channel:send_event(ChannelPid, EventType, Event);
-            false ->
-                ok
-        end
-                 end, UsedMap).
+-spec broadcast(Fun :: binary(), Endpoints :: map()) -> no_return().
+broadcast(Fun, Endpoints) when is_function(Fun, 1), is_map(Endpoints) ->
+    broadcast(Fun, [], Endpoints).
 
-broadcast_shutdown(UsedMap) when is_map(UsedMap) ->
-    maps:foreach(fun(_, #endpoint{channel_pid = ChannelPid}) ->
-        case is_process_alive(ChannelPid) of
+-spec broadcast(Fun :: binary(), ExcludeMacs :: [binary()], Endpoints :: map()) -> no_return().
+broadcast(Fun, ExcludeMacs, Endpoints) when is_function(Fun, 1), is_map(Endpoints), is_list(ExcludeMacs) ->
+    maps:foreach(fun(Mac, Endpoint) ->
+        case lists:member(Mac, ExcludeMacs) of
             true ->
-                NetworkShutdownEvent = sdlan_pb:encode_msg(#sdl_network_shutdown_event {
-                    message = <<"Network shutdown">>
-                }),
-                sdlan_channel:send_event(ChannelPid, ?PACKET_EVENT_NETWORK_SHUTDOWN, NetworkShutdownEvent),
-                sdlan_channel:stop(ChannelPid, normal);
+                ok;
             false ->
-                ok
+                Fun(Endpoint)
         end
-                 end, UsedMap).
+                 end, Endpoints).
 
 %% 解析IpAddr: <<"192.168.172/24">>
 -spec parse_ipaddr(IpAddr0 :: binary()) -> {IpAddr :: binary(), MaskLen :: integer()}.