New plugin infrastructure

Merge domain-independent plugin framework code from branches/plugins2,
leaving out the password quality interface.

ticket: 6763

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@24263 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 48 insertions, 0 deletions

diff --git a/src/include/krb5/plugin.h b/src/include/krb5/plugin.h
new file mode 100644
index 000000000..f43406ab8
--- /dev/null
+++ b/src/include/krb5/plugin.h
@@ -0,0 +1,48 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ * <krb5/plugin.h>
+ *
+ * Copyright (C) 2010 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ *
+ *
+ * Generic declarations for dynamic modules implementing krb5 plugin modules.
+ */
+
+#ifndef KRB5_PLUGIN_H
+#define KRB5_PLUGIN_H
+
+/* krb5_plugin_vtable is an abstract type.  Module initvt functions will cast
+ * it to the appropriate interface-specific vtable type. */
+typedef struct krb5_plugin_vtable_st *krb5_plugin_vtable;
+
+/*
+ * krb5_plugin_initvt_fn is the type of all module initvt functions.  Based on
+ * the maj_ver argument, the initvt function should cast vtable to the
+ * appropriate type and then fill it in.  If a vtable has been expanded,
+ * min_ver indicates which version of the vtable is being filled in.
+ */
+typedef krb5_error_code
+(*krb5_plugin_initvt_fn)(krb5_context context, int maj_ver, int min_ver,
+                         krb5_plugin_vtable vtable);
+
+#endif /* KRB5_PLUGIN_H */