fix(rtnl): Add Linux kernel version check for IFA_RT_PRIORITY

This commit adds a version check for the IFA_RT_PRIORITY constant, which was introduced in Linux kernel 4.18. The constant is now only defined if the kernel version is greater than 4.17.0. Signed-off-by: Jianhui Zhao <[email protected]>
zhaojh329 · Aug 1, 2024 · 52c2832 · 52c2832
1 parent bdca677
commit 52c2832
Show file tree

Hide file tree

Showing 2 changed files with 11 additions and 5 deletions.
diff --git a/ip.lua b/ip.lua
@@ -410,12 +410,14 @@ local function do_address(action, dev, addr)
         msg:put_attr_str(rtnl.IFA_LABEL, addr.label)
     end
 
-    if addr.metric then
-        msg:put_attr_u32(rtnl.IFA_RT_PRIORITY, addr.metric)
-    end
+    if rtnl.IFA_RT_PRIORITY then
+        if addr.metric then
+            msg:put_attr_u32(rtnl.IFA_RT_PRIORITY, addr.metric)
+        end
 
-    if addr.priority then
-        msg:put_attr_u32(rtnl.IFA_RT_PRIORITY, addr.priority)
+        if addr.priority then
+            msg:put_attr_u32(rtnl.IFA_RT_PRIORITY, addr.priority)
+        end
     end
 
     return rtnl_send(msg)

diff --git a/rtnl.c b/rtnl.c
@@ -3,6 +3,7 @@
  * Author: Jianhui Zhao <[email protected]>
  */
 
+#include <linux/version.h>
 #include <linux/rtnetlink.h>
 #include <linux/if.h>
 
@@ -289,7 +290,10 @@ int luaopen_eco_rtnl(lua_State *L)
     lua_add_constant(L, "IFA_CACHEINFO", IFA_CACHEINFO);
     lua_add_constant(L, "IFA_MULTICAST", IFA_MULTICAST);
     lua_add_constant(L, "IFA_FLAGS", IFA_FLAGS);
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(4,17,0)
     lua_add_constant(L, "IFA_RT_PRIORITY", IFA_RT_PRIORITY);
+#endif
 
     lua_add_constant(L, "RTNLGRP_LINK", RTNLGRP_LINK);
     lua_add_constant(L, "RTNLGRP_NOTIFY", RTNLGRP_NOTIFY);