P2P: Add callback for provision discovery failure

When provision discovery fails, this new callback will be called
so P2P users can react to the failure.

Signed-off-by: Jayant Sane <jayant.sane@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

src/p2p/p2p.c

@@ -2734,6 +2734,10 @@ static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
 		p2p->pd_retries--;
 		p2p_retry_pd(p2p);
 	} else {
+		if (p2p->cfg->prov_disc_fail)
+			p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
+						 p2p->pending_pd_devaddr,
+						 P2P_PROV_DISC_TIMEOUT);
 		p2p_reset_pending_pd(p2p);
 	}
 }

src/p2p/p2p.h

@@ -210,6 +210,12 @@ struct p2p_peer_info {
 	struct wpabuf *wps_vendor_ext[P2P_MAX_WPS_VENDOR_EXT];
 };
 
+enum p2p_prov_disc_status {
+	P2P_PROV_DISC_SUCCESS,
+	P2P_PROV_DISC_TIMEOUT,
+	P2P_PROV_DISC_REJECTED,
+};
+
 /**
  * struct p2p_config - P2P configuration
  *
@@ -602,6 +608,21 @@ struct p2p_config {
 	 */
 	void (*prov_disc_resp)(void *ctx, const u8 *peer, u16 config_methods);
 
+	/**
+	 * prov_disc_fail - Callback on Provision Discovery failure
+	 * @ctx: Callback context from cb_ctx
+	 * @peer: Source address of the response
+	 * @status: Cause of failure, will not be %P2P_PROV_DISC_SUCCESS
+	 *
+	 * This callback is used to indicate either a failure or no response
+	 * to an earlier provision discovery request.
+	 *
+	 * This callback handler can be set to %NULL if provision discovery
+	 * is not used or failures do not need to be indicated.
+	 */
+	void (*prov_disc_fail)(void *ctx, const u8 *peer,
+			       enum p2p_prov_disc_status status);
+
 	/**
 	 * invitation_process - Optional callback for processing Invitations
 	 * @ctx: Callback context from cb_ctx

src/p2p/p2p_pd.c

@@ -247,6 +247,9 @@ void p2p_process_prov_disc_resp(struct p2p_data *p2p, const u8 *sa,
 	if (msg.wps_config_methods != dev->req_config_methods) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer rejected "
 			"our Provisioning Discovery Request");
+		if (p2p->cfg->prov_disc_fail)
+			p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, sa,
+						 P2P_PROV_DISC_REJECTED);
 		p2p_parse_free(&msg);
 		goto out;
 	}