nl80211: New command for adding extra IE(s) into management frames

A new nl80211 command, NL80211_CMD_SET_MGMT_EXTRA_IE, can be used to
add arbitrary IE data into the end of management frames. The interface
allows extra IEs to be configured for each management frame subtype, but
only some of them (ProbeReq, ProbeResp, Auth, (Re)AssocReq, Deauth,
Disassoc) are currently accepted in mac80211 implementation.

This makes it easier to implement IEEE 802.11 extensions like WPS and
FT that add IE(s) into some management frames. In addition, this can
be useful for testing and experimentation purposes.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 4e7a7986a521..76aae3d8e97e 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -133,6 +133,14 @@
  * @NL80211_CMD_SET_MESH_PARAMS: Set mesh networking properties for the
  *      interface identified by %NL80211_ATTR_IFINDEX
  *
+ * @NL80211_CMD_SET_MGMT_EXTRA_IE: Set extra IEs for management frames. The
+ *      interface is identified with %NL80211_ATTR_IFINDEX and the management
+ *      frame subtype with %NL80211_ATTR_MGMT_SUBTYPE. The extra IE data to be
+ *      added to the end of the specified management frame is specified with
+ *      %NL80211_ATTR_IE. If the command succeeds, the requested data will be
+ *      added to all specified management frames generated by
+ *      kernel/firmware/driver.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -178,6 +186,8 @@ enum nl80211_commands {
         NL80211_CMD_GET_MESH_PARAMS,
         NL80211_CMD_SET_MESH_PARAMS,
 
+        NL80211_CMD_SET_MGMT_EXTRA_IE,
+
         /* add new commands above here */
 
         /* used to define NL80211_CMD_MAX below */
@@ -190,6 +200,7 @@ enum nl80211_commands {
  * here
  */
 #define NL80211_CMD_SET_BSS NL80211_CMD_SET_BSS
+#define NL80211_CMD_SET_MGMT_EXTRA_IE NL80211_CMD_SET_MGMT_EXTRA_IE
 
 /**
  * enum nl80211_attrs - nl80211 netlink attributes
@@ -284,6 +295,12 @@ enum nl80211_commands {
  *      supported interface types, each a flag attribute with the number
  *      of the interface mode.
  *
+ * @NL80211_ATTR_MGMT_SUBTYPE: Management frame subtype for
+ *      %NL80211_CMD_SET_MGMT_EXTRA_IE.
+ *
+ * @NL80211_ATTR_IE: Information element(s) data (used, e.g., with
+ *      %NL80211_CMD_SET_MGMT_EXTRA_IE).
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -348,6 +365,9 @@ enum nl80211_attrs {
 
         NL80211_ATTR_KEY_DEFAULT_MGMT,
 
+        NL80211_ATTR_MGMT_SUBTYPE,
+        NL80211_ATTR_IE,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
@@ -363,6 +383,8 @@ enum nl80211_attrs {
 #define NL80211_ATTR_WIPHY_TXQ_PARAMS NL80211_ATTR_WIPHY_TXQ_PARAMS
 #define NL80211_ATTR_WIPHY_FREQ NL80211_ATTR_WIPHY_FREQ
 #define NL80211_ATTR_WIPHY_CHANNEL_TYPE NL80211_ATTR_WIPHY_CHANNEL_TYPE
+#define NL80211_ATTR_MGMT_SUBTYPE NL80211_ATTR_MGMT_SUBTYPE
+#define NL80211_ATTR_IE NL80211_ATTR_IE
 
 #define NL80211_MAX_SUPP_RATES                  32
 #define NL80211_MAX_SUPP_REG_RULES              32