Avoid Wi-Fi restarts for disabled profiles Fix #3

src/wifi_manager.c

@@ -196,6 +196,48 @@ static void copy_working_config(wifi_app_config_t *config)
     unlock_shared();
 }
 
+static bool profiles_equal(const wifi_config_sta_profile_t *left,
+                           const wifi_config_sta_profile_t *right)
+{
+    return left->enabled == right->enabled &&
+           left->priority == right->priority &&
+           left->security == right->security &&
+           left->ssid_len == right->ssid_len &&
+           left->psk_len == right->psk_len &&
+           memcmp(left->ssid, right->ssid, left->ssid_len) == 0 &&
+           memcmp(left->psk, right->psk, left->psk_len) == 0;
+}
+
+/*
+ * Disabled profiles are staged configuration, not current radio policy. Their
+ * credentials and priority may be prepared without interrupting a live link.
+ */
+static bool config_requires_radio_restart(const wifi_app_config_t *current,
+                                          const wifi_app_config_t *candidate)
+{
+    if (current->ap_policy != candidate->ap_policy ||
+        current->ap_ssid_len != candidate->ap_ssid_len ||
+        current->ap_psk_len != candidate->ap_psk_len ||
+        current->ap_channel != candidate->ap_channel ||
+        memcmp(current->ap_ssid, candidate->ap_ssid, current->ap_ssid_len) != 0 ||
+        memcmp(current->ap_psk, candidate->ap_psk, current->ap_psk_len) != 0) {
+        return true;
+    }
+
+    for (size_t slot = 0U; slot < WIFI_CONFIG_STA_PROFILE_COUNT; ++slot) {
+        const wifi_config_sta_profile_t *old_profile = &current->profiles[slot];
+        const wifi_config_sta_profile_t *new_profile = &candidate->profiles[slot];
+        bool old_enabled = old_profile->enabled != 0U;
+        bool new_enabled = new_profile->enabled != 0U;
+
+        if (old_enabled != new_enabled ||
+            (old_enabled && !profiles_equal(old_profile, new_profile))) {
+            return true;
+        }
+    }
+    return false;
+}
+
 static bool connected_event_matches_active_profile(const manager_message_t *message)
 {
     bool matches = false;
@@ -1357,11 +1399,14 @@ esp_err_t wifi_manager_apply_working_config(const wifi_app_config_t *config)
         return ESP_ERR_INVALID_STATE;
     }
 
-    manager_message_t message = {.type = MESSAGE_COMMAND_APPLY};
     lock_shared();
-    if (!enqueue_message(&message)) {
-        unlock_shared();
-        return ESP_ERR_TIMEOUT;
+    bool restart_radio = config_requires_radio_restart(&s_shared.config, config);
+    if (restart_radio) {
+        manager_message_t message = {.type = MESSAGE_COMMAND_APPLY};
+        if (!enqueue_message(&message)) {
+            unlock_shared();
+            return ESP_ERR_TIMEOUT;
+        }
     }
     s_shared.config = *config;
     ++s_shared.snapshot.config_generation;