--- /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;
+}
projects / cassiopeia.git / blobdiff