1 files changed, 97 insertions, 0 deletions
diff --git a/src/tapctl/error.h b/src/tapctl/error.h
new file mode 100644
index 0000000..924cbbe
--- /dev/null
+++ b/src/tapctl/error.h
@@ -0,0 +1,97 @@
+/*
+ *  error -- OpenVPN compatible error reporting API
+ *           https://community.openvpn.net/openvpn/wiki/Tapctl
+ *
+ *  Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
+ *  Copyright (C) 2018 Simon Rozman <simon@rozman.si>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef ERROR_H
+#define ERROR_H
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+/*
+ * These globals should not be accessed directly,
+ * but rather through macros or inline functions defined below.
+ */
+extern unsigned int x_debug_level;
+extern int x_msg_line_num;
+
+/* msg() flags */
+
+#define M_DEBUG_LEVEL     (0x0F)         /* debug level mask */
+
+#define M_FATAL           (1<<4)         /* exit program */
+#define M_NONFATAL        (1<<5)         /* non-fatal error */
+#define M_WARN            (1<<6)         /* call syslog with LOG_WARNING */
+#define M_DEBUG           (1<<7)
+
+#define M_ERRNO           (1<<8)         /* show errno description */
+
+#define M_NOMUTE          (1<<11)        /* don't do mute processing */
+#define M_NOPREFIX        (1<<12)        /* don't show date/time prefix */
+#define M_USAGE_SMALL     (1<<13)        /* fatal options error, call usage_small */
+#define M_MSG_VIRT_OUT    (1<<14)        /* output message through msg_status_output callback */
+#define M_OPTERR          (1<<15)        /* print "Options error:" prefix */
+#define M_NOLF            (1<<16)        /* don't print new line */
+#define M_NOIPREFIX       (1<<17)        /* don't print instance prefix */
+
+/* flag combinations which are frequently used */
+#define M_ERR     (M_FATAL | M_ERRNO)
+#define M_USAGE   (M_USAGE_SMALL | M_NOPREFIX | M_OPTERR)
+#define M_CLIENT  (M_MSG_VIRT_OUT | M_NOMUTE | M_NOIPREFIX)
+
+
+/** Check muting filter */
+bool dont_mute(unsigned int flags);
+
+/* Macro to ensure (and teach static analysis tools) we exit on fatal errors */
+#ifdef _MSC_VER
+#pragma warning(disable: 4127) /* EXIT_FATAL(flags) macro raises "warning C4127: conditional expression is constant" on each non M_FATAL invocation. */
+#endif
+#define EXIT_FATAL(flags) do { if ((flags) & M_FATAL) {_exit(1);}} while (false)
+
+#define HAVE_VARARG_MACROS
+#define msg(flags, ...) do { if (msg_test(flags)) {x_msg((flags), __VA_ARGS__);} EXIT_FATAL(flags); } while (false)
+#ifdef ENABLE_DEBUG
+#define dmsg(flags, ...) do { if (msg_test(flags)) {x_msg((flags), __VA_ARGS__);} EXIT_FATAL(flags); } while (false)
+#else
+#define dmsg(flags, ...)
+#endif
+
+void x_msg(const unsigned int flags, const char *format, ...);     /* should be called via msg above */
+
+void x_msg_va(const unsigned int flags, const char *format, va_list arglist);
+
+/* Inline functions */
+
+static inline bool
+check_debug_level(unsigned int level)
+{
+    return (level & M_DEBUG_LEVEL) <= x_debug_level;
+}
+
+/** Return true if flags represent and enabled, not muted log level */
+static inline bool
+msg_test(unsigned int flags)
+{
+    return check_debug_level(flags) && dont_mute(flags);
+}
+
+#endif /* ifndef ERROR_H */