cloud_discovery: Track and persist discovery method

Adds support for recording the method used to discover the cloud
controller (e.g. DHCP, FLASH, OpenLAN).
The selected method  records the current date and time along
with the discovery method into "/etc/ucentral/discovery.state.json".
The date is stored in epoch format.

Fixed: WIFI-14966

Signed-off-by: Marek Kwaczynski <marek@shasta.cloud>

feeds/tip/cloud_discovery/files/usr/bin/cloud_discovery

@@ -15,9 +15,14 @@ const ONLINE = 2;
 const OFFLINE = 3;
 const ORPHAN = 4;
 
+const DISCOVER_DHCP = "DHCP";
+const DISCOVER_FLASH = "FLASH";
+const DISCOVER_LOOKUP = "OpenLAN";
+
 let ubus = libubus.connect();
 let uci = libuci.cursor();
 let state = DISCOVER;
+let discovery_method = "";
 let validate_time;
 let offline_time;
 let orphan_time;
@@ -78,6 +83,14 @@ function gateway_load() {
 	return readjsonfile('/etc/ucentral/gateway.json');
 }
 
+function discovery_state_write() {
+	let discovery_state = {
+		"type": discovery_method,
+		"updated": time()
+	};
+	fs.writefile('/etc/ucentral/discovery.state.json', discovery_state);
+}
+
 function gateway_write(data) {
 	let gateway = gateway_load();
 	gateway ??= {};
@@ -130,6 +143,7 @@ function set_state(set) {
 		if (prev == VALIDATING) {
 			ulog(LOG_INFO, 'Setting cloud controller to validated\n');
 			gateway_write({ valid: true });
+			discovery_state_write();
 		}
 		break;
 
@@ -227,15 +241,18 @@ function interval_handler() {
 		if (!time_is_valid())
 			return;
 
+		discovery_method = DISCOVER_DHCP;
 		if (discover_dhcp())
 			return;
 
 		if (system('/usr/bin/est_client enroll'))
 			return;
 
+		discovery_method = DISCOVER_FLASH;
 		if (!discover_flash())
 			return;
 
+		discovery_method = DISCOVER_LOOKUP;
 		redirector_lookup();
 		break;
 

patches/0096-base-files-boot-add-sync-after-uci-defaults.patch

@@ -1,33 +0,0 @@
-From 309a419087da906a2f3b0f39763f021e9729dd85 Mon Sep 17 00:00:00 2001
-From: Paul White <paul@shasta.cloud>
-Date: Mon, 4 Aug 2025 04:14:23 +0000
-Subject: [PATCH] base-files: boot: add sync after uci-defaults
-
-A scenario was seen where UCI config was not flushed to disk before
-an AP power-cycle after uci-defaults was completed.  Since these
-scripts are deleted after being ran once, there is no way to recover
-without a factory reset.
-
-Adding this sync operation proved to help avoid this situation from
-happening
-
-Signed-off-by: Paul White <paul@shasta.cloud>
----
- package/base-files/files/etc/init.d/boot | 1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/package/base-files/files/etc/init.d/boot b/package/base-files/files/etc/init.d/boot
-index 15756669a9..c8a803e32c 100755
---- a/package/base-files/files/etc/init.d/boot
-+++ b/package/base-files/files/etc/init.d/boot
-@@ -15,6 +15,7 @@ uci_apply_defaults() {
- 		( . "./$(basename $file)" ) && rm -f "$file"
- 	done
- 	uci commit
-+	sync
- }
- 
- boot() {
--- 
-2.43.0
-