P2P: Add p2p_cancel command for cancelling ongoing group formation

wpa_supplicant/ctrl_iface.c

@@ -2884,6 +2884,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 		os_memset(wpa_s->p2p_auth_invite, 0, ETH_ALEN);
 		wpa_s->force_long_sd = 0;
 		p2p_flush(wpa_s->global->p2p);
+	} else if (os_strcmp(buf, "P2P_CANCEL") == 0) {
+		if (wpas_p2p_cancel(wpa_s))
+			reply_len = -1;
 	} else if (os_strncmp(buf, "P2P_PRESENCE_REQ ", 17) == 0) {
 		if (p2p_ctrl_presence_req(wpa_s, buf + 17) < 0)
 			reply_len = -1;

wpa_supplicant/p2p_supplicant.c

@@ -3628,3 +3628,37 @@ void wpas_p2p_update_channel_list(struct wpa_supplicant *wpa_s)
 
 	p2p_update_channel_list(wpa_s->global->p2p, &chan);
 }
+
+
+int wpas_p2p_cancel(struct wpa_supplicant *wpa_s)
+{
+	struct wpa_global *global = wpa_s->global;
+	int found = 0;
+
+	wpa_printf(MSG_DEBUG, "P2P: Request to cancel group formation");
+
+	if (wpa_s->pending_interface_name[0] &&
+	    !is_zero_ether_addr(wpa_s->pending_interface_addr))
+		found = 1;
+
+	wpas_p2p_stop_find(wpa_s);
+
+	for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
+		if (wpa_s == global->p2p_group_formation &&
+		    wpa_s->p2p_in_provisioning) {
+			wpa_printf(MSG_DEBUG, "P2P: Interface %s in group "
+				   "formation found - cancelling",
+				   wpa_s->ifname);
+			found = 1;
+			wpas_p2p_group_delete(wpa_s);
+			break;
+		}
+	}
+
+	if (!found) {
+		wpa_printf(MSG_DEBUG, "P2P: No ongoing group formation found");
+		return -1;
+	}
+
+	return 0;
+}

wpa_supplicant/p2p_supplicant.h

@@ -116,5 +116,6 @@ void wpas_p2p_notif_connected(struct wpa_supplicant *wpa_s);
 void wpas_p2p_notif_disconnected(struct wpa_supplicant *wpa_s);
 int wpas_p2p_notif_pbc_overlap(struct wpa_supplicant *wpa_s);
 void wpas_p2p_update_channel_list(struct wpa_supplicant *wpa_s);
+int wpas_p2p_cancel(struct wpa_supplicant *wpa_s);
 
 #endif /* P2P_SUPPLICANT_H */

wpa_supplicant/wpa_cli.c

@@ -2055,6 +2055,13 @@ static int wpa_cli_cmd_p2p_flush(struct wpa_ctrl *ctrl, int argc, char *argv[])
 }
 
 
+static int wpa_cli_cmd_p2p_cancel(struct wpa_ctrl *ctrl, int argc,
+				  char *argv[])
+{
+	return wpa_ctrl_command(ctrl, "P2P_CANCEL");
+}
+
+
 static int wpa_cli_cmd_p2p_presence_req(struct wpa_ctrl *ctrl, int argc,
 					char *argv[])
 {
@@ -2407,6 +2414,8 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	  "<field> <value> = set a P2P parameter" },
 	{ "p2p_flush", wpa_cli_cmd_p2p_flush, cli_cmd_flag_none,
 	  "= flush P2P state" },
+	{ "p2p_cancel", wpa_cli_cmd_p2p_cancel, cli_cmd_flag_none,
+	  "= cancel P2P group formation" },
 	{ "p2p_presence_req", wpa_cli_cmd_p2p_presence_req, cli_cmd_flag_none,
 	  "[<duration> <interval>] [<duration> <interval>] = request GO "
 	  "presence" },