P2P: Notify upper framework on stopping the p2p_find(SEARCH)

This patch notifies the upper framework that an on-going discovery has
been stopped. This is useful in cases where a p2p_find with a timeout
value initiated by the upper framework has been finished or when the
framework initiated "p2p_find" is stopped by a "p2p_connect".

Signed-hostap: Jithu Jance <jithu@broadcom.com>

src/common/wpa_ctrl.h

@@ -128,6 +128,7 @@ extern "C" {
 #define P2P_EVENT_SERV_DISC_RESP "P2P-SERV-DISC-RESP "
 #define P2P_EVENT_INVITATION_RECEIVED "P2P-INVITATION-RECEIVED "
 #define P2P_EVENT_INVITATION_RESULT "P2P-INVITATION-RESULT "
+#define P2P_EVENT_FIND_STOPPED "P2P-FIND-STOPPED "
 
 #define INTERWORKING_AP "INTERWORKING-AP "
 #define INTERWORKING_NO_MATCH "INTERWORKING-NO-MATCH "

src/p2p/p2p.c

@@ -18,6 +18,7 @@
 #include "eloop.h"
 #include "common/ieee802_11_defs.h"
 #include "common/ieee802_11_common.h"
+#include "common/wpa_ctrl.h"
 #include "wps/wps_i.h"
 #include "p2p_i.h"
 #include "p2p.h"
@@ -994,6 +995,8 @@ void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
 	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopping find");
 	eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
 	p2p_clear_timeout(p2p);
+	if (p2p->state == P2P_SEARCH)
+		wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, P2P_EVENT_FIND_STOPPED);
 	p2p_set_state(p2p, P2P_IDLE);
 	p2p_free_req_dev_types(p2p);
 	p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;