1 files changed, 109 insertions, 0 deletions
diff --git a/src/openvpn/mbuf.h b/src/openvpn/mbuf.h
new file mode 100644
index 0000000..a0de679
--- /dev/null
+++ b/src/openvpn/mbuf.h
@@ -0,0 +1,109 @@
+/*
+ *  OpenVPN -- An application to securely tunnel IP networks
+ *             over a single TCP/UDP port, with support for SSL/TLS-based
+ *             session authentication and key exchange,
+ *             packet encryption, packet authentication, and
+ *             packet compression.
+ *
+ *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ *  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 (see the file COPYING included with this
+ *  distribution); if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef MBUF_H
+#define MBUF_H
+
+/*
+ * Handle both multicast and broadcast functions.
+ */
+
+#if P2MP
+
+/* define this to enable special test mode */
+/*#define MBUF_TEST*/
+
+#include "basic.h"
+#include "buffer.h"
+
+struct multi_instance;
+
+#define MBUF_INDEX(head, offset, size) (((head) + (offset)) & ((size)-1))
+
+struct mbuf_buffer
+{
+  struct buffer buf;
+  int refcount;
+
+# define MF_UNICAST (1<<0)
+  unsigned int flags;
+};
+
+struct mbuf_item
+{
+  struct mbuf_buffer *buffer;
+  struct multi_instance *instance;
+};
+
+struct mbuf_set
+{
+  unsigned int head;
+  unsigned int len;
+  unsigned int capacity;
+  unsigned int max_queued;
+  struct mbuf_item *array;
+};
+
+struct mbuf_set *mbuf_init (unsigned int size);
+void mbuf_free (struct mbuf_set *ms);
+
+struct mbuf_buffer *mbuf_alloc_buf (const struct buffer *buf);
+void mbuf_free_buf (struct mbuf_buffer *mb);
+
+void mbuf_add_item (struct mbuf_set *ms, const struct mbuf_item *item);
+
+bool mbuf_extract_item (struct mbuf_set *ms, struct mbuf_item *item);
+
+void mbuf_dereference_instance (struct mbuf_set *ms, struct multi_instance *mi);
+
+static inline bool
+mbuf_defined (const struct mbuf_set *ms)
+{
+  return ms && ms->len;
+}
+
+static inline bool
+mbuf_len (const struct mbuf_set *ms)
+{
+  return ms->len;
+}
+
+static inline int
+mbuf_maximum_queued (const struct mbuf_set *ms)
+{
+  return (int) ms->max_queued;
+}
+
+static inline struct multi_instance *
+mbuf_peek (struct mbuf_set *ms)
+{
+  struct multi_instance *mbuf_peek_dowork (struct mbuf_set *ms);
+  if (mbuf_defined (ms))
+    return mbuf_peek_dowork (ms);
+  else
+    return NULL;
+}
+
+#endif
+#endif