1 /* $OpenBSD: alloc.c,v 1.14 2016/02/06 23:50:10 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 57 struct lease_state *free_lease_states; 58 struct tree_cache *free_tree_caches; 59 60 struct tree_cache * 61 new_tree_cache(char *name) 62 { 63 struct tree_cache *rval; 64 65 if (free_tree_caches) { 66 rval = free_tree_caches; 67 free_tree_caches = (struct tree_cache *)(rval->value); 68 } else { 69 rval = calloc(1, sizeof(struct tree_cache)); 70 if (!rval) 71 error("unable to allocate tree cache for %s.", name); 72 } 73 return (rval); 74 } 75 76 void 77 free_tree_cache(struct tree_cache *ptr) 78 { 79 ptr->value = (unsigned char *)free_tree_caches; 80 free_tree_caches = ptr; 81 } 82 83 struct lease_state * 84 new_lease_state(char *name) 85 { 86 struct lease_state *rval; 87 88 if (free_lease_states) { 89 rval = free_lease_states; 90 free_lease_states = free_lease_states->next; 91 } else { 92 rval = calloc(1, sizeof(struct lease_state)); 93 if (!rval) 94 error("unable to allocate lease state for %s.", name); 95 } 96 97 return (rval); 98 } 99 100 void 101 free_lease_state(struct lease_state *ptr, char *name) 102 { 103 free(ptr->prl); 104 ptr->next = free_lease_states; 105 free_lease_states = ptr; 106 } 107