diff options
Diffstat (limited to 'mbuf.c')
| -rw-r--r-- | mbuf.c | 169 |
1 files changed, 0 insertions, 169 deletions
@@ -1,169 +0,0 @@ -/* - * 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 - */ - -#include "syshead.h" - -#if P2MP - -#include "buffer.h" -#include "error.h" -#include "misc.h" -#include "mbuf.h" - -#include "memdbg.h" - -struct mbuf_set * -mbuf_init (unsigned int size) -{ - struct mbuf_set *ret; - ALLOC_OBJ_CLEAR (ret, struct mbuf_set); - ret->capacity = adjust_power_of_2 (size); - ALLOC_ARRAY (ret->array, struct mbuf_item, ret->capacity); - return ret; -} - -void -mbuf_free (struct mbuf_set *ms) -{ - if (ms) - { - int i; - for (i = 0; i < (int) ms->len; ++i) - { - struct mbuf_item *item = &ms->array[MBUF_INDEX(ms->head, i, ms->capacity)]; - mbuf_free_buf (item->buffer); - } - free (ms->array); - free (ms); - } -} - -struct mbuf_buffer * -mbuf_alloc_buf (const struct buffer *buf) -{ - struct mbuf_buffer *ret; - ALLOC_OBJ (ret, struct mbuf_buffer); - ret->buf = clone_buf (buf); - ret->refcount = 1; - ret->flags = 0; - return ret; -} - -void -mbuf_free_buf (struct mbuf_buffer *mb) -{ - if (mb) - { - if (--mb->refcount <= 0) - { - free_buf (&mb->buf); - free (mb); - } - } -} - -void -mbuf_add_item (struct mbuf_set *ms, const struct mbuf_item *item) -{ - ASSERT (ms); - if (ms->len == ms->capacity) - { - struct mbuf_item rm; - ASSERT (mbuf_extract_item (ms, &rm)); - mbuf_free_buf (rm.buffer); - msg (D_MULTI_DROPPED, "MBUF: mbuf packet dropped"); - } - - ASSERT (ms->len < ms->capacity); - - ms->array[MBUF_INDEX(ms->head, ms->len, ms->capacity)] = *item; - if (++ms->len > ms->max_queued) - ms->max_queued = ms->len; - ++item->buffer->refcount; -} - -bool -mbuf_extract_item (struct mbuf_set *ms, struct mbuf_item *item) -{ - bool ret = false; - if (ms) - { - while (ms->len) - { - *item = ms->array[ms->head]; - ms->head = MBUF_INDEX(ms->head, 1, ms->capacity); - --ms->len; - if (item->instance) /* ignore dereferenced instances */ - { - ret = true; - break; - } - } - } - return ret; -} - -struct multi_instance * -mbuf_peek_dowork (struct mbuf_set *ms) -{ - struct multi_instance *ret = NULL; - if (ms) - { - int i; - for (i = 0; i < (int) ms->len; ++i) - { - struct mbuf_item *item = &ms->array[MBUF_INDEX(ms->head, i, ms->capacity)]; - if (item->instance) - { - ret = item->instance; - break; - } - } - } - return ret; -} - -void -mbuf_dereference_instance (struct mbuf_set *ms, struct multi_instance *mi) -{ - if (ms) - { - int i; - for (i = 0; i < (int) ms->len; ++i) - { - struct mbuf_item *item = &ms->array[MBUF_INDEX(ms->head, i, ms->capacity)]; - if (item->instance == mi) - { - mbuf_free_buf (item->buffer); - item->buffer = NULL; - item->instance = NULL; - msg (D_MBUF, "MBUF: dereferenced queued packet"); - } - } - } -} - -#else -static void dummy(void) {} -#endif /* P2MP */ |