nl80211: support sending TDLS commands/frames

Add support for sending high-level TDLS commands and TDLS frames via
NL80211_CMD_TDLS_OPER and NL80211_CMD_TDLS_MGMT, respectively. Add
appropriate cfg80211 callbacks for lower level drivers.

Add wiphy capability flags for TDLS support and advertise them via
nl80211.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Cc: Kalyan C Gaddam <chakkal@iit.edu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index c73582fb9d20..a5ab23df5b17 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -506,6 +506,9 @@
  * @NL80211_CMD_PMKSA_CANDIDATE: This is used as an event to inform userspace
  *      of PMKSA caching dandidates.
  *
+ * @NL80211_CMD_TDLS_OPER: Perform a high-level TDLS command (e.g. link setup).
+ * @NL80211_CMD_TDLS_MGMT: Send a TDLS management frame.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -632,6 +635,9 @@ enum nl80211_commands {
 
         NL80211_CMD_PMKSA_CANDIDATE,
 
+        NL80211_CMD_TDLS_OPER,
+        NL80211_CMD_TDLS_MGMT,
+
         /* add new commands above here */
 
         /* used to define NL80211_CMD_MAX below */
@@ -1089,6 +1095,20 @@ enum nl80211_commands {
  *      This attribute is used with %NL80211_CMD_TRIGGER_SCAN and
  *      %NL80211_CMD_FRAME commands.
  *
+ * @NL80211_ATTR_TDLS_ACTION: Low level TDLS action code (e.g. link setup
+ *      request, link setup confirm, link teardown, etc.). Values are
+ *      described in the TDLS (802.11z) specification.
+ * @NL80211_ATTR_TDLS_DIALOG_TOKEN: Non-zero token for uniquely identifying a
+ *      TDLS conversation between two devices.
+ * @NL80211_ATTR_TDLS_OPERATION: High level TDLS operation; see
+ *      &enum nl80211_tdls_operation, represented as a u8.
+ * @NL80211_ATTR_TDLS_SUPPORT: A flag indicating the device can operate
+ *      as a TDLS peer sta.
+ * @NL80211_ATTR_TDLS_EXTERNAL_SETUP: The TDLS discovery/setup and teardown
+ *      procedures should be performed by sending TDLS packets via
+ *      %NL80211_CMD_TDLS_MGMT. Otherwise %NL80211_CMD_TDLS_OPER should be
+ *      used for asking the driver to perform a TDLS operation.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1311,6 +1331,12 @@ enum nl80211_attrs {
 
         NL80211_ATTR_TX_NO_CCK_RATE,
 
+        NL80211_ATTR_TDLS_ACTION,
+        NL80211_ATTR_TDLS_DIALOG_TOKEN,
+        NL80211_ATTR_TDLS_OPERATION,
+        NL80211_ATTR_TDLS_SUPPORT,
+        NL80211_ATTR_TDLS_EXTERNAL_SETUP,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
@@ -2604,4 +2630,20 @@ enum nl80211_pmksa_candidate_attr {
         MAX_NL80211_PMKSA_CANDIDATE = NUM_NL80211_PMKSA_CANDIDATE - 1
 };
 
+/**
+ * enum nl80211_tdls_operation - values for %NL80211_ATTR_TDLS_OPERATION
+ * @NL80211_TDLS_DISCOVERY_REQ: Send a TDLS discovery request
+ * @NL80211_TDLS_SETUP: Setup TDLS link
+ * @NL80211_TDLS_TEARDOWN: Teardown a TDLS link which is already established
+ * @NL80211_TDLS_ENABLE_LINK: Enable TDLS link
+ * @NL80211_TDLS_DISABLE_LINK: Disable TDLS link
+ */
+enum nl80211_tdls_operation {
+        NL80211_TDLS_DISCOVERY_REQ,
+        NL80211_TDLS_SETUP,
+        NL80211_TDLS_TEARDOWN,
+        NL80211_TDLS_ENABLE_LINK,
+        NL80211_TDLS_DISABLE_LINK,
+};
+
 #endif /* __LINUX_NL80211_H */