TDLS: Set the initiator during tdls_mgmt operations

Some drivers need to know the initiator of a TDLS connection in order
to generate a correct TDLS mgmt packet. It is used to determine
the link identifier IE. Pass this information to the driver.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>

src/drivers/driver.h

@@ -2503,6 +2503,7 @@ struct wpa_driver_ops {
 	 * @dialog_token: Dialog Token to use in the message (if needed)
 	 * @status_code: Status Code or Reason Code to use (if needed)
 	 * @peer_capab: TDLS peer capability (TDLS_PEER_* bitfield)
+	 * @initiator: Is the current end the TDLS link initiator
 	 * @buf: TDLS IEs to add to the message
 	 * @len: Length of buf in octets
 	 * Returns: 0 on success, negative (<0) on failure
@@ -2512,7 +2513,7 @@ struct wpa_driver_ops {
 	 */
 	int (*send_tdls_mgmt)(void *priv, const u8 *dst, u8 action_code,
 			      u8 dialog_token, u16 status_code, u32 peer_capab,
-			      const u8 *buf, size_t len);
+			      int initiator, const u8 *buf, size_t len);
 
 	/**
 	 * tdls_oper - Ask the driver to perform high-level TDLS operations

src/drivers/driver_nl80211.c

@@ -11605,7 +11605,8 @@ nla_put_failure:
 
 static int nl80211_send_tdls_mgmt(void *priv, const u8 *dst, u8 action_code,
 				  u8 dialog_token, u16 status_code,
-				  u32 peer_capab, const u8 *buf, size_t len)
+				  u32 peer_capab, int initiator, const u8 *buf,
+				  size_t len)
 {
 	struct i802_bss *bss = priv;
 	struct wpa_driver_nl80211_data *drv = bss->drv;
@@ -11636,6 +11637,8 @@ static int nl80211_send_tdls_mgmt(void *priv, const u8 *dst, u8 action_code,
 		 */
 		NLA_PUT_U32(msg, NL80211_ATTR_TDLS_PEER_CAPABILITY, peer_capab);
 	}
+	if (initiator)
+		NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_INITIATOR);
 	NLA_PUT(msg, NL80211_ATTR_IE, len, buf);
 
 	return send_and_recv_msgs(drv, msg, NULL, NULL);

src/rsn_supp/tdls.c

@@ -218,26 +218,29 @@ static int wpa_tdls_set_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
 static int wpa_tdls_send_tpk_msg(struct wpa_sm *sm, const u8 *dst,
 				 u8 action_code, u8 dialog_token,
 				 u16 status_code, u32 peer_capab,
-				 const u8 *buf, size_t len)
+				 int initiator, const u8 *buf, size_t len)
 {
 	return wpa_sm_send_tdls_mgmt(sm, dst, action_code, dialog_token,
-				     status_code, peer_capab, buf, len);
+				     status_code, peer_capab, initiator, buf,
+				     len);
 }
 
 
 static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
 			     u8 dialog_token, u16 status_code, u32 peer_capab,
-			     const u8 *msg, size_t msg_len)
+			     int initiator, const u8 *msg, size_t msg_len)
 {
 	struct wpa_tdls_peer *peer;
 
 	wpa_printf(MSG_DEBUG, "TDLS: TPK send dest=" MACSTR " action_code=%u "
-		   "dialog_token=%u status_code=%u peer_capab=%u msg_len=%u",
+		   "dialog_token=%u status_code=%u peer_capab=%u initiator=%d "
+		   "msg_len=%u",
 		   MAC2STR(dest), action_code, dialog_token, status_code,
-		   peer_capab, (unsigned int) msg_len);
+		   peer_capab, initiator, (unsigned int) msg_len);
 
 	if (wpa_tdls_send_tpk_msg(sm, dest, action_code, dialog_token,
-				  status_code, peer_capab, msg, msg_len)) {
+				  status_code, peer_capab, initiator, msg,
+				  msg_len)) {
 		wpa_printf(MSG_INFO, "TDLS: Failed to send message "
 			   "(action_code=%u)", action_code);
 		return -1;
@@ -333,6 +336,7 @@ static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx)
 					  peer->sm_tmr.dialog_token,
 					  peer->sm_tmr.status_code,
 					  peer->sm_tmr.peer_capab,
+					  peer->initiator,
 					  peer->sm_tmr.buf,
 					  peer->sm_tmr.buf_len)) {
 			wpa_printf(MSG_INFO, "TDLS: Failed to retry "
@@ -793,7 +797,7 @@ skip_ies:
 
 	/* request driver to send Teardown using this FTIE */
 	wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_TEARDOWN, 0,
-			  reason_code, 0, rbuf, pos - rbuf);
+			  reason_code, 0, peer->initiator, rbuf, pos - rbuf);
 	os_free(rbuf);
 
 	return 0;
@@ -968,17 +972,19 @@ skip_ftie:
  *	appropriate status code mentioning reason for error/failure.
  * @dst 	- MAC addr of Peer station
  * @tdls_action - TDLS frame type for which error code is sent
+ * @initiator   - was this end the initiator of the connection
  * @status 	- status code mentioning reason
  */
 
 static int wpa_tdls_send_error(struct wpa_sm *sm, const u8 *dst,
-			       u8 tdls_action, u8 dialog_token, u16 status)
+			       u8 tdls_action, u8 dialog_token, int initiator,
+			       u16 status)
 {
 	wpa_printf(MSG_DEBUG, "TDLS: Sending error to " MACSTR
 		   " (action=%u status=%u)",
 		   MAC2STR(dst), tdls_action, status);
 	return wpa_tdls_tpk_send(sm, dst, tdls_action, dialog_token, status,
-				 0, NULL, 0);
+				 0, initiator, NULL, 0);
 }
 
 
@@ -1184,7 +1190,7 @@ skip_ies:
 		   MAC2STR(peer->addr));
 
 	status = wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST,
-				   1, 0, 0, rbuf, pos - rbuf);
+				   1, 0, 0, peer->initiator, rbuf, pos - rbuf);
 	os_free(rbuf);
 
 	return status;
@@ -1274,7 +1280,8 @@ static int wpa_tdls_send_tpk_m2(struct wpa_sm *sm,
 
 skip_ies:
 	status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE,
-				   dtoken, 0, 0, rbuf, pos - rbuf);
+				   dtoken, 0, 0, peer->initiator, rbuf,
+				   pos - rbuf);
 	os_free(rbuf);
 
 	return status;
@@ -1371,7 +1378,8 @@ skip_ies:
 		peer_capab |= TDLS_PEER_WMM;
 
 	status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM,
-				   dtoken, 0, peer_capab, rbuf, pos - rbuf);
+				   dtoken, 0, peer_capab, peer->initiator,
+				   rbuf, pos - rbuf);
 	os_free(rbuf);
 
 	return status;
@@ -1457,7 +1465,7 @@ skip_rsn_ies:
 	wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", peer->lifetime);
 skip_ies:
 	status = wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_DISCOVERY_RESPONSE,
-				   dialog_token, 0, 0,  rbuf, pos - rbuf);
+				   dialog_token, 0, 0, 0, rbuf, pos - rbuf);
 	os_free(rbuf);
 
 	return status;
@@ -1528,7 +1536,7 @@ int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr)
 	wpa_printf(MSG_DEBUG, "TDLS: Sending Discovery Request to peer "
 		   MACSTR, MAC2STR(addr));
 	return wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_DISCOVERY_REQUEST,
-				 1, 0, 0, NULL, 0);
+				 1, 0, 0, 1, NULL, 0);
 }
 
 
@@ -2051,7 +2059,7 @@ skip_rsn_check:
 	return 0;
 
 error:
-	wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken,
+	wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken, 0,
 			    status);
 	if (peer)
 		wpa_tdls_peer_free(sm, peer);
@@ -2362,7 +2370,7 @@ skip_rsn:
 	return ret;
 
 error:
-	wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken,
+	wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken, 1,
 			    status);
 	wpa_tdls_disable_peer_link(sm, peer);
 	return -1;

src/rsn_supp/wpa.h

@@ -55,7 +55,7 @@ struct wpa_sm_ctx {
 	int (*send_tdls_mgmt)(void *ctx, const u8 *dst,
 			      u8 action_code, u8 dialog_token,
 			      u16 status_code, u32 peer_capab,
-			      const u8 *buf, size_t len);
+			      int initiator, const u8 *buf, size_t len);
 	int (*tdls_oper)(void *ctx, int oper, const u8 *peer);
 	int (*tdls_peer_addset)(void *ctx, const u8 *addr, int add, u16 aid,
 				u16 capability, const u8 *supp_rates,

src/rsn_supp/wpa_i.h

@@ -268,12 +268,14 @@ static inline int wpa_sm_tdls_get_capa(struct wpa_sm *sm,
 static inline int wpa_sm_send_tdls_mgmt(struct wpa_sm *sm, const u8 *dst,
 					u8 action_code, u8 dialog_token,
 					u16 status_code, u32 peer_capab,
-					const u8 *buf, size_t len)
+					int initiator, const u8 *buf,
+					size_t len)
 {
 	if (sm->ctx->send_tdls_mgmt)
 		return sm->ctx->send_tdls_mgmt(sm->ctx->ctx, dst, action_code,
 					       dialog_token, status_code,
-					       peer_capab, buf, len);
+					       peer_capab, initiator, buf,
+					       len);
 	return -1;
 }
 

wpa_supplicant/driver_i.h

@@ -532,14 +532,14 @@ static inline int wpa_drv_ampdu(struct wpa_supplicant *wpa_s, int ampdu)
 static inline int wpa_drv_send_tdls_mgmt(struct wpa_supplicant *wpa_s,
 					 const u8 *dst, u8 action_code,
 					 u8 dialog_token, u16 status_code,
-					 u32 peer_capab, const u8 *buf,
+					 u32 peer_capab, int initiator,
-					 size_t len)
+					 const u8 *buf, size_t len)
 {
 	if (wpa_s->driver->send_tdls_mgmt) {
 		return wpa_s->driver->send_tdls_mgmt(wpa_s->drv_priv, dst,
 						     action_code, dialog_token,
 						     status_code, peer_capab,
-						     buf, len);
+						     initiator, buf, len);
 	}
 	return -1;
 }

wpa_supplicant/wpas_glue.c

@@ -580,11 +580,13 @@ static int wpa_supplicant_tdls_get_capa(void *ctx, int *tdls_supported,
 static int wpa_supplicant_send_tdls_mgmt(void *ctx, const u8 *dst,
 					 u8 action_code, u8 dialog_token,
 					 u16 status_code, u32 peer_capab,
-					 const u8 *buf, size_t len)
+					 int initiator, const u8 *buf,
+					 size_t len)
 {
 	struct wpa_supplicant *wpa_s = ctx;
 	return wpa_drv_send_tdls_mgmt(wpa_s, dst, action_code, dialog_token,
-				      status_code, peer_capab, buf, len);
+				      status_code, peer_capab, initiator, buf,
+				      len);
 }