log: Implment new logging functions.

include/libssh/callbacks.h

@@ -74,6 +74,24 @@ typedef int (*ssh_channel_callback_data) (ssh_channel channel, int code, void *d
 typedef void (*ssh_log_callback) (ssh_session session, int priority,
     const char *message, void *userdata);
 
+/**
+ * @brief SSH log callback.
+ *
+ * All logging messages will go through this callback.
+ *
+ * @param priority  Priority of the log, the smaller being the more important.
+ *
+ * @param function  The function name calling the the logging fucntions.
+ *
+ * @param message   The actual message
+ *
+ * @param userdata Userdata to be passed to the callback function.
+ */
+typedef void (*ssh_logging_callback) (int priority,
+                                      const char *function,
+                                      const char *buffer,
+                                      void *userdata);
+
 /**
  * @brief SSH Connection status callback.
  * @param session Current session handler
@@ -798,6 +816,22 @@ LIBSSH_API struct ssh_threads_callbacks_struct *ssh_threads_get_pthread(void);
  */
 LIBSSH_API struct ssh_threads_callbacks_struct *ssh_threads_get_noop(void);
 
+/**
+ * @brief Set the logging callback function.
+ *
+ * @param[in]  cb  The callback to set.
+ *
+ * @return         0 on success, < 0 on errror.
+ */
+LIBSSH_API int ssh_set_log_callback(ssh_logging_callback cb);
+
+/**
+ * @brief Get the pointer to the logging callback function.
+ *
+ * @return The pointer the the callback or NULL if none set.
+ */
+LIBSSH_API ssh_logging_callback ssh_get_log_callback(void);
+
 /** @} */
 #ifdef __cplusplus
 }

include/libssh/libssh.h

@@ -418,6 +418,12 @@ LIBSSH_API int ssh_is_blocking(ssh_session session);
 LIBSSH_API int ssh_is_connected(ssh_session session);
 LIBSSH_API int ssh_is_server_known(ssh_session session);
 
+/* LOGGING */
+LIBSSH_API int ssh_set_log_level(int level);
+LIBSSH_API int ssh_get_log_level(void);
+LIBSSH_API void *ssh_get_log_userdata(void);
+LIBSSH_API int ssh_set_log_userdata(void *data);
+
 /* legacy */
 LIBSSH_API void ssh_log(ssh_session session,
                         int prioriry,

include/libssh/priv.h

@@ -152,15 +152,17 @@ struct ssh_kex_struct;
 int ssh_get_key_params(ssh_session session, ssh_key *privkey);
 
 /* LOGGING */
-#define SSH_LOG(session, priority, ...) \
-    ssh_log_common(&session->common, priority, __FUNCTION__, __VA_ARGS__)
+void _ssh_log(int verbosity,
+              const char *function,
+              const char *format, ...) PRINTF_ATTRIBUTE(3, 4);
+#define SSH_LOG(priority, ...) \
+    _ssh_log(priority, __FUNCTION__, __VA_ARGS__)
+
+/* LEGACY */
 void ssh_log_common(struct ssh_common_struct *common,
                     int verbosity,
                     const char *function,
                     const char *format, ...) PRINTF_ATTRIBUTE(4, 5);
-void ssh_log_function(int verbosity,
-                      const char *function,
-                      const char *buffer);
 
 
 /* ERROR HANDLING */