1 /* $OpenBSD: alloc.c,v 1.15 2017/02/13 19:13:14 krw Exp $ */
2
3 /* Memory allocation... */
4
5 /*
6 * Copyright (c) 1995, 1996, 1998 The Internet Software Consortium.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of The Internet Software Consortium nor the names
19 * of its contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
23 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
30 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * This software has been written for the Internet Software Consortium
37 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
38 * Enterprises. To learn more about the Internet Software Consortium,
39 * see ``http://www.vix.com/isc''. To learn more about Vixie
40 * Enterprises, see ``http://www.vix.com''.
41 */
42
43 #include <sys/types.h>
44 #include <sys/socket.h>
45
46 #include <net/if.h>
47
48 #include <netinet/in.h>
49
50 #include <stdio.h>
51 #include <stdlib.h>
52
53 #include "dhcp.h"
54 #include "tree.h"
55 #include "dhcpd.h"
56 #include "log.h"
57
58 struct lease_state *free_lease_states;
59 struct tree_cache *free_tree_caches;
60
61 struct tree_cache *
new_tree_cache(char * name)62 new_tree_cache(char *name)
63 {
64 struct tree_cache *rval;
65
66 if (free_tree_caches) {
67 rval = free_tree_caches;
68 free_tree_caches = (struct tree_cache *)(rval->value);
69 } else {
70 rval = calloc(1, sizeof(struct tree_cache));
71 if (!rval)
72 fatalx("unable to allocate tree cache for %s.", name);
73 }
74 return (rval);
75 }
76
77 void
free_tree_cache(struct tree_cache * ptr)78 free_tree_cache(struct tree_cache *ptr)
79 {
80 ptr->value = (unsigned char *)free_tree_caches;
81 free_tree_caches = ptr;
82 }
83
84 struct lease_state *
new_lease_state(char * name)85 new_lease_state(char *name)
86 {
87 struct lease_state *rval;
88
89 if (free_lease_states) {
90 rval = free_lease_states;
91 free_lease_states = free_lease_states->next;
92 } else {
93 rval = calloc(1, sizeof(struct lease_state));
94 if (!rval)
95 fatalx("unable to allocate lease state for %s.", name);
96 }
97
98 return (rval);
99 }
100
101 void
free_lease_state(struct lease_state * ptr,char * name)102 free_lease_state(struct lease_state *ptr, char *name)
103 {
104 free(ptr->prl);
105 ptr->next = free_lease_states;
106 free_lease_states = ptr;
107 }
108