mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-10 14:58:27 -05:00
202 lines
4.7 KiB
C
Executable File
202 lines
4.7 KiB
C
Executable File
/* $OpenBSD: pqueue.c,v 1.5 2014/06/12 15:49:31 deraadt Exp $ */
|
|
/*
|
|
* DTLS implementation written by Nagendra Modadugu
|
|
* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "pqueue.h"
|
|
|
|
typedef struct _pqueue {
|
|
pitem *items;
|
|
int count;
|
|
} pqueue_s;
|
|
|
|
pitem *
|
|
pitem_new(unsigned char *prio64be, void *data)
|
|
{
|
|
pitem *item = malloc(sizeof(pitem));
|
|
|
|
if (item == NULL)
|
|
return NULL;
|
|
|
|
memcpy(item->priority, prio64be, sizeof(item->priority));
|
|
|
|
item->data = data;
|
|
item->next = NULL;
|
|
|
|
return item;
|
|
}
|
|
|
|
void
|
|
pitem_free(pitem *item)
|
|
{
|
|
free(item);
|
|
}
|
|
|
|
pqueue_s *
|
|
pqueue_new(void)
|
|
{
|
|
return calloc(1, sizeof(pqueue_s));
|
|
}
|
|
|
|
void
|
|
pqueue_free(pqueue_s *pq)
|
|
{
|
|
free(pq);
|
|
}
|
|
|
|
pitem *
|
|
pqueue_insert(pqueue_s *pq, pitem *item)
|
|
{
|
|
pitem *curr, *next;
|
|
|
|
if (pq->items == NULL) {
|
|
pq->items = item;
|
|
return item;
|
|
}
|
|
|
|
for (curr = NULL, next = pq->items; next != NULL;
|
|
curr = next, next = next->next) {
|
|
/* we can compare 64-bit value in big-endian encoding
|
|
* with memcmp:-) */
|
|
int cmp = memcmp(next->priority, item->priority,
|
|
sizeof(item->priority));
|
|
if (cmp > 0) { /* next > item */
|
|
item->next = next;
|
|
|
|
if (curr == NULL)
|
|
pq->items = item;
|
|
else
|
|
curr->next = item;
|
|
|
|
return item;
|
|
} else if (cmp == 0) /* duplicates not allowed */
|
|
return NULL;
|
|
}
|
|
|
|
item->next = NULL;
|
|
curr->next = item;
|
|
|
|
return item;
|
|
}
|
|
|
|
pitem *
|
|
pqueue_peek(pqueue_s *pq)
|
|
{
|
|
return pq->items;
|
|
}
|
|
|
|
pitem *
|
|
pqueue_pop(pqueue_s *pq)
|
|
{
|
|
pitem *item = pq->items;
|
|
|
|
if (pq->items != NULL)
|
|
pq->items = pq->items->next;
|
|
|
|
return item;
|
|
}
|
|
|
|
pitem *
|
|
pqueue_find(pqueue_s *pq, unsigned char *prio64be)
|
|
{
|
|
pitem *next;
|
|
|
|
for (next = pq->items; next != NULL; next = next->next)
|
|
if (memcmp(next->priority, prio64be,
|
|
sizeof(next->priority)) == 0)
|
|
return next;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
pitem *
|
|
pqueue_iterator(pqueue_s *pq)
|
|
{
|
|
return pqueue_peek(pq);
|
|
}
|
|
|
|
pitem *
|
|
pqueue_next(pitem **item)
|
|
{
|
|
pitem *ret;
|
|
|
|
if (item == NULL || *item == NULL)
|
|
return NULL;
|
|
|
|
/* *item != NULL */
|
|
ret = *item;
|
|
*item = (*item)->next;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
pqueue_size(pqueue_s *pq)
|
|
{
|
|
pitem *item = pq->items;
|
|
int count = 0;
|
|
|
|
while (item != NULL) {
|
|
count++;
|
|
item = item->next;
|
|
}
|
|
return count;
|
|
}
|