nl80211: Add NLA_F_NESTED to nla_nest_start() with older libnl versions

This is needed to work around a missing attribute that would cause
cfg80211 to reject some nl80211 commands (e.g.,
NL80211_ATTR_VENDOR_DATA) with new kernel versions that enforce netlink
attribute policy validation.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

src/drivers/driver_nl80211.h

@@ -17,6 +17,11 @@
 #include "utils/list.h"
 #include "driver.h"
 
+#ifndef NL_CAPABILITY_VERSION_3_5_0
+#define nla_nest_start(msg, attrtype) \
+	nla_nest_start(msg, NLA_F_NESTED | (attrtype))
+#endif
+
 struct nl80211_global {
 	void *ctx;
 	struct dl_list interfaces;