+++ /dev/null
-/* crypto/pqueue/pqueue.c */
-/*
- * 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 "cryptlib.h"
-#include <openssl/bn.h>
-#include "pqueue.h"
-
-typedef struct _pqueue
- {
- pitem *items;
- int count;
- } pqueue_s;
-
-pitem *
-pitem_new(unsigned char *prio64be, void *data)
- {
- pitem *item = (pitem *) OPENSSL_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)
- {
- if (item == NULL) return;
-
- OPENSSL_free(item);
- }
-
-pqueue_s *
-pqueue_new()
- {
- pqueue_s *pq = (pqueue_s *) OPENSSL_malloc(sizeof(pqueue_s));
- if (pq == NULL) return NULL;
-
- memset(pq, 0x00, sizeof(pqueue_s));
- return pq;
- }
-
-void
-pqueue_free(pqueue_s *pq)
- {
- if (pq == NULL) return;
-
- OPENSSL_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,8);
- 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;
- pitem *found = NULL;
-
- if ( pq->items == NULL)
- return NULL;
-
- for ( next = pq->items; next->next != NULL; next = next->next)
- {
- if ( memcmp(next->priority, prio64be,8) == 0)
- {
- found = next;
- break;
- }
- }
-
- /* check the one last node */
- if ( memcmp(next->priority, prio64be,8) ==0)
- found = next;
-
- if ( ! found)
- return NULL;
-
-#if 0 /* find works in peek mode */
- if ( prev == NULL)
- pq->items = next->next;
- else
- prev->next = next->next;
-#endif
-
- return found;
- }
-
-void
-pqueue_print(pqueue_s *pq)
- {
- pitem *item = pq->items;
-
- while(item != NULL)
- {
- printf("item\t%02x%02x%02x%02x%02x%02x%02x%02x\n",
- item->priority[0],item->priority[1],
- item->priority[2],item->priority[3],
- item->priority[4],item->priority[5],
- item->priority[6],item->priority[7]);
- item = item->next;
- }
- }
-
-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;
-}
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