Netif (Windows): fix default route detection when the default adapter is disabled

CarterLi · CarterLi · commit ccbb9e90ea6d · 2025-07-21T20:24:43.000+08:00
This commit addresses an issue where the default route detection on Windows incorrectly identified a disabled adapter as the default route. Previously, when a user disabled the adapter configured as the default route, the system still reported it as active due to stale routing table entries.
diff --git a/src/common/netif/netif_windows.c b/src/common/netif/netif_windows.c
@@ -18,6 +18,8 @@ bool ffNetifGetDefaultRouteImpl(FF_MAYBE_UNUSED char iface[IF_NAMESIZE + 1], uin
     {
         MIB_IPFORWARD_ROW2* row = &pIpForwardTable->Table[i];
 
+        if (row->Age > row->ValidLifetime) continue;
+
         if ((row->DestinationPrefix.PrefixLength == 0) &&
             ((row->DestinationPrefix.Prefix.Ipv4.sin_family == AF_INET &&
               row->DestinationPrefix.Prefix.Ipv4.sin_addr.S_un.S_addr == 0) ||

Original file line number	Diff line number	Diff line change
`@@ -18,6 +18,8 @@ bool ffNetifGetDefaultRouteImpl(FF_MAYBE_UNUSED char iface[IF_NAMESIZE + 1], uin`
`18`	`18`	`{`
`19`	`19`	`MIB_IPFORWARD_ROW2* row = &pIpForwardTable->Table[i];`
`20`	`20`
	`21`	`+ if (row->Age > row->ValidLifetime) continue;`
	`22`	`+`
`21`	`23`	`if ((row->DestinationPrefix.PrefixLength == 0) &&`
`22`	`24`	`((row->DestinationPrefix.Prefix.Ipv4.sin_family == AF_INET &&`
`23`	`25`	`row->DestinationPrefix.Prefix.Ipv4.sin_addr.S_un.S_addr == 0) \|\|`