charon: Add custom logger to daemon

This logger can be used to easily register custom logging instances
using __attribute__((constructor)) benefiting from the global reload
mechanism (with reset of log levels).

Note that this is not intended to be used from plugins, which are loaded
after loggers have already been initialized.

Signed-off-by: Thomas Egerer <thomas.egerer@secunet.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/src/libcharon/bus/listeners/custom_logger.h b/src/libcharon/bus/listeners/custom_logger.h
new file mode 100644
index 000000000..a256ad1ec
--- /dev/null
+++ b/src/libcharon/bus/listeners/custom_logger.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2016 secunet Security Networks AG
+ * Copyright (C) 2016 Thomas Egerer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * @defgroup custom_logger custom_logger
+ * @{ @ingroup listeners
+ */
+
+#ifndef CUSTOM_LOGGER_H_
+#define CUSTOM_LOGGER_H_
+
+#include <bus/listeners/logger.h>
+
+typedef struct custom_logger_t custom_logger_t;
+
+/**
+ * Custom logger which implements listener_t.
+ */
+struct custom_logger_t {
+
+	/**
+	 * Implements the logger_t interface.
+	 */
+	logger_t logger;
+
+	/**
+	 * Set the loglevel for a debug group.
+	 *
+	 * @param group		debug group to set
+	 * @param level		max level to log (0..4)
+	 */
+	void (*set_level) (custom_logger_t *this, debug_t group, level_t level);
+
+	/**
+	 * Destroy the custom_logger_t object.
+	 */
+	void (*destroy) (custom_logger_t *this);
+};
+
+/**
+ * Prototype for custom logger construction function pointer.
+ */
+typedef custom_logger_t *(*custom_logger_constructor_t)(const char *name);
+
+#endif /** CUSTOM_LOGGER_H_ @}*/