1 files changed, 58 insertions, 0 deletions
diff --git a/src/lib/version.c b/src/lib/version.c
new file mode 100644
index 0000000..c4dc025
--- /dev/null
+++ b/src/lib/version.c
@@ -0,0 +1,58 @@
+/*
+ * version.c	Validate application and library magic numbers.
+ *
+ * Version:	$Id$
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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 St, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * Copyright 1999-2014  The FreeRADIUS server project
+ */
+
+RCSID("$Id$")
+
+#include <freeradius-devel/libradius.h>
+
+static uint64_t libmagic = RADIUSD_MAGIC_NUMBER;
+
+/** Check if the application linking to the library has the correct magic number
+ *
+ * @param magic number as defined by RADIUSD_MAGIC_NUMBER
+ * @returns 0 on success, -1 on prefix mismatch, -2 on version mismatch -3 on commit mismatch.
+ */
+int fr_check_lib_magic(uint64_t magic)
+{
+	if (MAGIC_PREFIX(magic) != MAGIC_PREFIX(libmagic)) {
+		fr_strerror_printf("Application and libfreeradius-radius magic number (prefix) mismatch."
+				   "  application: %x  library: %x",
+				   MAGIC_PREFIX(magic), MAGIC_PREFIX(libmagic));
+		return -1;
+	}
+
+	if (MAGIC_VERSION(magic) != MAGIC_VERSION(libmagic)) {
+		fr_strerror_printf("Application and libfreeradius-radius magic number (version) mismatch."
+				   "  application: %lx library: %lx",
+				   (unsigned long) MAGIC_VERSION(magic), (unsigned long) MAGIC_VERSION(libmagic));
+		return -2;
+	}
+
+	if (MAGIC_COMMIT(magic) != MAGIC_COMMIT(libmagic)) {
+		fr_strerror_printf("Application and libfreeradius-radius magic number (commit) mismatch."
+				   "  application: %lx library: %lx",
+				   (unsigned long) MAGIC_COMMIT(magic), (unsigned long) MAGIC_COMMIT(libmagic));
+		return -3;
+	}
+
+	return 0;
+}