From 11e559b76b799f68d4efea242599871ceadd242f Mon Sep 17 00:00:00 2001
From: anlicheng <244108715@qq.com>
Date: Sat, 13 Dec 2025 21:29:54 +0800
Subject: [PATCH] fix regedit

---
 apps/sdlan/src/sdlan_hostname_regedit.erl | 2 +-
 apps/sdlan/src/sdlan_network.erl          | 9 +++++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/apps/sdlan/src/sdlan_hostname_regedit.erl b/apps/sdlan/src/sdlan_hostname_regedit.erl
index 2ee7c30..c934516 100644
--- a/apps/sdlan/src/sdlan_hostname_regedit.erl
+++ b/apps/sdlan/src/sdlan_hostname_regedit.erl
@@ -27,6 +27,6 @@ lookup(FullHostname) when is_binary(FullHostname) ->
     end.
 
 -spec insert(FullHostname :: binary(), Ip :: integer()) -> no_return().
-insert(FullHostname, Ip) when is_integer(FullHostname) ->
+insert(FullHostname, Ip) when is_binary(FullHostname), is_integer(Ip) ->
     <<Ip0, Ip1, Ip2, Ip3>> = <<Ip:32>>,
     true = ets:insert(?TABLE, {FullHostname, {Ip0, Ip1, Ip2, Ip3}}).
\ No newline at end of file
diff --git a/apps/sdlan/src/sdlan_network.erl b/apps/sdlan/src/sdlan_network.erl
index 6190d37..3bdee21 100644
--- a/apps/sdlan/src/sdlan_network.erl
+++ b/apps/sdlan/src/sdlan_network.erl
@@ -232,8 +232,13 @@ handle_call({assign_ip_addr, ChannelPid, ClientId, Mac, NetAddr0, HostName}, _Fr
             maybe_close_channel(maps:get(Mac, UsedMap, undefined)),
 
             %% 添加域名->ip的映射关系
-            FullHostname = <<HostName/binary, ".", Domain/binary>>,
-            sdlan_hostname_regedit:insert(FullHostname, Ip),
+            case HostName =/= <<>> of
+                true ->
+                    FullHostname = <<HostName/binary, ".", Domain/binary>>,
+                    sdlan_hostname_regedit:insert(FullHostname, Ip);
+                false ->
+                    ok
+            end,
 
             %% 建立到新的channel之间的关系
             MRef = monitor(process, ChannelPid),