/* alloc.c

   Memory allocation... */

/*
 * Copyright (c) 1995, 1996, 1998 The Internet Software Consortium.
 * 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. Neither the name of The Internet Software Consortium nor the names
 *    of its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS 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 INTERNET SOFTWARE CONSORTIUM OR
 * 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 software has been written for the Internet Software Consortium
 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
 * Enterprises.  To learn more about the Internet Software Consortium,
 * see ``http://www.vix.com/isc''.  To learn more about Vixie
 * Enterprises, see ``http://www.vix.com''.
 */

#include "dhcpd.h"

struct dhcp_packet *dhcp_free_list;
struct packet *packet_free_list;

void * dmalloc(size, name)
	int size;
	char *name;
{
	void *foo = calloc(size, sizeof(char));
	if (!foo)
		warn ("No memory for %s.", name);
	return foo;
}

void dfree(ptr, name)
	void *ptr;
	char *name;
{
	if (!ptr) {
		warn ("dfree %s: free on null pointer.", name);
		return;
	}
	free (ptr);
}

struct packet *new_packet(name)
	char *name;
{
	struct packet *rval;
	rval = (struct packet *)dmalloc(sizeof(struct packet), name);
	return rval;
}

struct dhcp_packet *new_dhcp_packet(name)
	char *name;
{
	struct dhcp_packet *rval;
	rval = (struct dhcp_packet *)dmalloc(sizeof(struct dhcp_packet),
	          name);
	return rval;
}

struct tree *new_tree(name)
	char *name;
{
	struct tree *rval = dmalloc(sizeof(struct tree), name);
	return rval;
}

struct string_list *new_string_list(size, name)
	size_t size;
	char * name;
{
	struct string_list *rval;

	rval =dmalloc(sizeof(struct string_list) + size, name);
	if (rval != NULL) 
		rval->string = ((char *)rval) + sizeof(struct string_list);
	return rval;
}

struct tree_cache *free_tree_caches;

struct tree_cache *new_tree_cache(name)
	char *name;
{
	struct tree_cache *rval;

	if (free_tree_caches) {
		rval = free_tree_caches;
		free_tree_caches =
			(struct tree_cache *)(rval->value);
	} else {
		rval = dmalloc(sizeof(struct tree_cache), name);
		if (!rval)
			error("unable to allocate tree cache for %s.", name);
	}
	return rval;
}

struct hash_table *new_hash_table(count, name)
	int count;
	char *name;
{
	struct hash_table *rval;
	rval = dmalloc(sizeof (struct hash_table)
          - (DEFAULT_HASH_SIZE * sizeof(struct hash_bucket *))
          + (count * sizeof(struct hash_bucket *)), name);
	rval->hash_count = count;
	return rval;
}

struct hash_bucket *new_hash_bucket(name)
	char *name;
{
	struct hash_bucket *rval = dmalloc(sizeof(struct hash_bucket), name);
	return rval;
}

struct lease *new_leases(n, name)
	int n;
	char *name;
{
	struct lease *rval = dmalloc(n * sizeof(struct lease), name);
	return rval;
}

struct lease *new_lease(name)
	char *name;
{
	struct lease *rval = dmalloc(sizeof(struct lease), name);
	return rval;
}

struct subnet *new_subnet(name)
	char *name;
{
	struct subnet *rval = dmalloc(sizeof(struct subnet), name);
	return rval;
}

struct class *new_class(name)
	char *name;
{
	struct class *rval = dmalloc(sizeof(struct class), name);
	return rval;
}

struct shared_network *new_shared_network(name)
	char *name;
{
	struct shared_network *rval =
		dmalloc (sizeof(struct shared_network), name);
	return rval;
}

struct group *new_group(name)
	char *name;
{
	struct group *rval =
		dmalloc(sizeof(struct group), name);
	return rval;
}

struct protocol *new_protocol(name)
	char *name;
{
	struct protocol *rval = dmalloc(sizeof(struct protocol), name);
	return rval;
}

struct lease_state *free_lease_states;

struct lease_state *new_lease_state (name)
	char *name;
{
	struct lease_state *rval;

	if (free_lease_states) {
		rval = free_lease_states;
		free_lease_states =
			(struct lease_state *)(free_lease_states->next);
	} else {
		rval = dmalloc (sizeof (struct lease_state), name);
	}
	return rval;
}

struct domain_search_list *new_domain_search_list (name)
	char *name;
{
	struct domain_search_list *rval =
		dmalloc (sizeof (struct domain_search_list), name);
	return rval;
}

struct name_server *new_name_server (name)
	char *name;
{
	struct name_server *rval =
		dmalloc (sizeof (struct name_server), name);
	return rval;
}

void free_name_server (ptr, name)
	struct name_server *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_domain_search_list (ptr, name)
	struct domain_search_list *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_lease_state (ptr, name)
	struct lease_state *ptr;
	char *name;
{
	if (ptr->prl)
		dfree (ptr->prl, name);
	ptr->next = free_lease_states;
	free_lease_states = ptr;
}

void free_protocol (ptr, name)
	struct protocol *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_group (ptr, name)
	struct group *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_shared_network (ptr, name)
	struct shared_network *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_class (ptr, name)
	struct class *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_subnet (ptr, name)
	struct subnet *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_lease (ptr, name)
	struct lease *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_hash_bucket (ptr, name)
	struct hash_bucket *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_hash_table (ptr, name)
	struct hash_table *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_tree_cache (ptr, name)
	struct tree_cache *ptr;
	char *name;
{
	ptr->value = (unsigned char *)free_tree_caches;
	free_tree_caches = ptr;
}

void free_packet (ptr, name)
	struct packet *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_dhcp_packet (ptr, name)
	struct dhcp_packet *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_tree (ptr, name)
	struct tree *ptr;
	char *name;
{
	dfree (ptr, name);
}

void free_string_list (ptr, name)
	struct string_list *ptr;
	char *name;
{
	dfree (ptr, name);
}