mirror of
https://github.com/OpenVPN/openvpn.git
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d02a86d37b
git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@7051 e7ae566f-a301-0410-adde-c780ea21d3b5
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*
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* OpenVPN -- An application to securely tunnel IP networks
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* over a single TCP/UDP port, with support for SSL/TLS-based
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* session authentication and key exchange,
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* packet encryption, packet authentication, and
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* packet compression.
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*
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* Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING included with this
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* distribution); if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef MBUF_H
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#define MBUF_H
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/*
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* Handle both multicast and broadcast functions.
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*/
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#if P2MP
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/* define this to enable special test mode */
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/*#define MBUF_TEST*/
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#include "basic.h"
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#include "buffer.h"
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struct multi_instance;
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#define MBUF_INDEX(head, offset, size) (((head) + (offset)) & ((size)-1))
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struct mbuf_buffer
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{
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struct buffer buf;
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int refcount;
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# define MF_UNICAST (1<<0)
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unsigned int flags;
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};
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struct mbuf_item
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{
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struct mbuf_buffer *buffer;
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struct multi_instance *instance;
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};
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struct mbuf_set
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{
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unsigned int head;
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unsigned int len;
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unsigned int capacity;
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unsigned int max_queued;
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struct mbuf_item *array;
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};
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struct mbuf_set *mbuf_init (unsigned int size);
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void mbuf_free (struct mbuf_set *ms);
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struct mbuf_buffer *mbuf_alloc_buf (const struct buffer *buf);
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void mbuf_free_buf (struct mbuf_buffer *mb);
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void mbuf_add_item (struct mbuf_set *ms, const struct mbuf_item *item);
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bool mbuf_extract_item (struct mbuf_set *ms, struct mbuf_item *item);
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void mbuf_dereference_instance (struct mbuf_set *ms, struct multi_instance *mi);
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static inline bool
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mbuf_defined (const struct mbuf_set *ms)
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{
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return ms && ms->len;
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}
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static inline bool
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mbuf_len (const struct mbuf_set *ms)
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{
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return ms->len;
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}
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static inline int
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mbuf_maximum_queued (const struct mbuf_set *ms)
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{
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return (int) ms->max_queued;
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}
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static inline struct multi_instance *
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mbuf_peek (struct mbuf_set *ms)
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{
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struct multi_instance *mbuf_peek_dowork (struct mbuf_set *ms);
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if (mbuf_defined (ms))
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return mbuf_peek_dowork (ms);
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else
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return NULL;
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}
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#endif
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#endif
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