Add SSID and PSK config items

components/config/config.h

@@ -51,4 +51,60 @@ size_t config_get_hostname(char *buffer, size_t buffer_size);
  */
 void config_add_hostname_callback(ConfigCallback callback);
 
+/**
+ * Set the SSID of the WiFi network.
+ *
+ * The argument should be a null-terminated string. If the maximum
+ * length is exceeded, the value will still be used, but will be
+ * truncated.
+ */
+void config_set_ssid(const char *ssid);
+
+/**
+ * Write the SSID of the WiFi network into the given buffer.
+ *
+ * The length of the SSID is returned. If the value's size exceeds
+ * the size of the buffer, nothing will be written to the buffer but
+ * the length is still returned.
+ */
+size_t config_get_ssid(char *buffer, size_t buffer_size);
+
+/**
+ * Add a callback for SSID updates.
+ *
+ * The function specified in the argument will be invoked whenever a
+ * the ssid is updated, with the new value as its argument. The
+ * lifetime of the passed argument will be static, but the value may
+ * be modified once the callback returns.
+ */
+void config_add_ssid_callback(ConfigCallback callback);
+
+/**
+ * Set the PSK for the WiFi network.
+ *
+ * The argument should be a null-terminated string. If the maximum
+ * length is exceeded, the value will still be used, but will be
+ * truncated.
+ */
+void config_set_psk(const char *psk);
+
+/**
+ * Write the PSK for the WiFi network into the given buffer.
+ *
+ * The length of the psk is returned. If the value's size exceeds
+ * the size of the buffer, nothing will be written to the buffer but
+ * the length is still returned.
+ */
+size_t config_get_psk(char *buffer, size_t buffer_size);
+
+/**
+ * Add a callback for PSK updates.
+ *
+ * The function specified in the argument will be invoked whenever a
+ * the psk is updated, with the new value as its argument. The
+ * lifetime of the passed argument will be static, but the value may
+ * be modified once the callback returns.
+ */
+void config_add_psk_callback(ConfigCallback callback);
+
 #endif