mirror of
https://gitlab.isc.org/isc-projects/dhcp
synced 2025-08-22 09:57:20 +00:00
883 lines
16 KiB
C
883 lines
16 KiB
C
/* alloc.c
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Memory allocation... */
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/*
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* Copyright (c) 1996-1999 Internet Software Consortium.
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* Use is subject to license terms which appear in the file named
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* ISC-LICENSE that should have accompanied this file when you
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* received it. If a file named ISC-LICENSE did not accompany this
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* file, or you are not sure the one you have is correct, you may
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* obtain an applicable copy of the license at:
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*
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* http://www.isc.org/isc-license-1.0.html.
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*
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* This file is part of the ISC DHCP distribution. The documentation
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* associated with this file is listed in the file DOCUMENTATION,
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* included in the top-level directory of this release.
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*
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* Support and other services are available for ISC products - see
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* http://www.isc.org for more information.
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*/
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#ifndef lint
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static char copyright[] =
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"$Id: alloc.c,v 1.36 2000/01/05 17:57:03 mellon Exp $ Copyright (c) 1995, 1996, 1998 The Internet Software Consortium. All rights reserved.\n";
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#endif /* not lint */
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#include "dhcpd.h"
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struct dhcp_packet *dhcp_free_list;
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struct packet *packet_free_list;
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VOIDPTR dmalloc (size, name)
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unsigned size;
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const char *name;
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{
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VOIDPTR foo = (VOIDPTR)malloc (size);
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if (!foo)
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log_error ("No memory for %s.", name);
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else
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memset (foo, 0, size);
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return foo;
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}
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void dfree (ptr, name)
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VOIDPTR ptr;
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const char *name;
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{
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if (!ptr) {
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log_error ("dfree %s: free on null pointer.", name);
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return;
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}
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free (ptr);
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}
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struct dhcp_packet *new_dhcp_packet (name)
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const char *name;
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{
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struct dhcp_packet *rval;
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rval = (struct dhcp_packet *)dmalloc (sizeof (struct dhcp_packet),
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name);
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return rval;
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}
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struct hash_table *new_hash_table (count, name)
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int count;
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const char *name;
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{
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struct hash_table *rval = dmalloc (sizeof (struct hash_table)
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- (DEFAULT_HASH_SIZE
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* sizeof (struct hash_bucket *))
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+ (count
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* sizeof (struct hash_bucket *)),
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name);
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rval -> hash_count = count;
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return rval;
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}
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struct hash_bucket *new_hash_bucket (name)
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const char *name;
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{
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struct hash_bucket *rval = dmalloc (sizeof (struct hash_bucket), name);
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return rval;
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}
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struct lease *new_leases (n, name)
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unsigned n;
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const char *name;
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{
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struct lease *rval = dmalloc (n * sizeof (struct lease), name);
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return rval;
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}
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struct lease *new_lease (name)
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const char *name;
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{
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struct lease *rval = dmalloc (sizeof (struct lease), name);
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return rval;
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}
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struct subnet *new_subnet (name)
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const char *name;
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{
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struct subnet *rval = dmalloc (sizeof (struct subnet), name);
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return rval;
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}
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struct class *new_class (name)
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const char *name;
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{
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struct class *rval = dmalloc (sizeof (struct class), name);
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return rval;
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}
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struct shared_network *new_shared_network (name)
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const char *name;
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{
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struct shared_network *rval =
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dmalloc (sizeof (struct shared_network), name);
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return rval;
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}
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struct group *new_group (name)
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const char *name;
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{
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struct group *rval =
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dmalloc (sizeof (struct group), name);
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if (rval)
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memset (rval, 0, sizeof *rval);
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return rval;
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}
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struct protocol *new_protocol (name)
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const char *name;
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{
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struct protocol *rval = dmalloc (sizeof (struct protocol), name);
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return rval;
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}
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struct lease_state *free_lease_states;
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struct lease_state *new_lease_state (name)
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const char *name;
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{
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struct lease_state *rval;
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if (free_lease_states) {
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rval = free_lease_states;
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free_lease_states =
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(struct lease_state *)(free_lease_states -> next);
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} else {
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rval = dmalloc (sizeof (struct lease_state), name);
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if (!rval)
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return rval;
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}
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memset (rval, 0, sizeof *rval);
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if (!option_state_allocate (&rval -> options, name)) {
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free_lease_state (rval, name);
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return (struct lease_state *)0;
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}
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return rval;
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}
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struct domain_search_list *new_domain_search_list (name)
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const char *name;
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{
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struct domain_search_list *rval =
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dmalloc (sizeof (struct domain_search_list), name);
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return rval;
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}
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struct name_server *new_name_server (name)
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const char *name;
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{
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struct name_server *rval =
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dmalloc (sizeof (struct name_server), name);
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return rval;
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}
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void free_name_server (ptr, name)
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struct name_server *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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struct option *new_option (name)
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const char *name;
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{
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struct option *rval =
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dmalloc (sizeof (struct option), name);
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if (rval)
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memset (rval, 0, sizeof *rval);
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return rval;
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}
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void free_option (ptr, name)
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struct option *ptr;
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const char *name;
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{
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/* XXX have to put all options on heap before this is possible. */
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#if 0
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if (ptr -> name)
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dfree ((VOIDPTR)option -> name, name);
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dfree ((VOIDPTR)ptr, name);
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#endif
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}
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struct universe *new_universe (name)
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const char *name;
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{
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struct universe *rval =
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dmalloc (sizeof (struct universe), name);
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return rval;
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}
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void free_universe (ptr, name)
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struct universe *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_domain_search_list (ptr, name)
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struct domain_search_list *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_lease_state (ptr, name)
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struct lease_state *ptr;
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const char *name;
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{
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if (ptr -> options)
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option_state_dereference (&ptr -> options, name);
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if (ptr -> packet)
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packet_dereference (&ptr -> packet, name);
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ptr -> next = free_lease_states;
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free_lease_states = ptr;
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}
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void free_protocol (ptr, name)
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struct protocol *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_group (ptr, name)
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struct group *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_shared_network (ptr, name)
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struct shared_network *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_class (ptr, name)
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struct class *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_subnet (ptr, name)
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struct subnet *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_lease (ptr, name)
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struct lease *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_hash_bucket (ptr, name)
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struct hash_bucket *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_hash_table (ptr, name)
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struct hash_table *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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void free_dhcp_packet (ptr, name)
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struct dhcp_packet *ptr;
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const char *name;
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{
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dfree ((VOIDPTR)ptr, name);
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}
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struct client_lease *new_client_lease (name)
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const char *name;
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{
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return (struct client_lease *)dmalloc (sizeof (struct client_lease),
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name);
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}
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void free_client_lease (lease, name)
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struct client_lease *lease;
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const char *name;
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{
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dfree (lease, name);
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}
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struct pool *new_pool (name)
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const char *name;
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{
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struct pool *pool = ((struct pool *)
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dmalloc (sizeof (struct pool), name));
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if (!pool)
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return pool;
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memset (pool, 0, sizeof *pool);
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return pool;
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}
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void free_pool (pool, name)
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struct pool *pool;
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const char *name;
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{
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dfree (pool, name);
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}
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struct auth_key *new_auth_key (len, name)
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unsigned len;
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const char *name;
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{
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struct auth_key *peer;
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unsigned size = len - 1 + sizeof (struct auth_key);
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peer = (struct auth_key *)dmalloc (size, name);
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if (!peer)
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return peer;
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memset (peer, 0, size);
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return peer;
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}
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void free_auth_key (peer, name)
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struct auth_key *peer;
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const char *name;
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{
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dfree (peer, name);
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}
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struct permit *new_permit (name)
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const char *name;
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{
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struct permit *permit = ((struct permit *)
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dmalloc (sizeof (struct permit), name));
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if (!permit)
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return permit;
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memset (permit, 0, sizeof *permit);
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return permit;
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}
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void free_permit (permit, name)
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struct permit *permit;
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const char *name;
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{
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dfree (permit, name);
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}
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pair free_pairs;
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pair new_pair (name)
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const char *name;
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{
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pair foo;
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if (free_pairs) {
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foo = free_pairs;
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free_pairs = foo -> cdr;
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memset (foo, 0, sizeof *foo);
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return foo;
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}
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foo = dmalloc (sizeof *foo, name);
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if (!foo)
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return foo;
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memset (foo, 0, sizeof *foo);
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return foo;
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}
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void free_pair (foo, name)
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pair foo;
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const char *name;
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{
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foo -> cdr = free_pairs;
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free_pairs = foo;
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}
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struct expression *free_expressions;
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int expression_allocate (cptr, name)
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struct expression **cptr;
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const char *name;
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{
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struct expression *rval;
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if (free_expressions) {
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rval = free_expressions;
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free_expressions = rval -> data.not;
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} else {
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rval = dmalloc (sizeof (struct expression), name);
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if (!rval)
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return 0;
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}
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memset (rval, 0, sizeof *rval);
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return expression_reference (cptr, rval, name);
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}
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void free_expression (expr, name)
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struct expression *expr;
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const char *name;
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{
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expr -> data.not = free_expressions;
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free_expressions = expr;
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}
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int expression_reference (ptr, src, name)
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struct expression **ptr;
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struct expression *src;
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const char *name;
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{
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if (!ptr) {
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log_error ("Null pointer in expression_reference: %s", name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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return 0;
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#endif
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}
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if (*ptr) {
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log_error ("Non-null pointer in expression_reference (%s)",
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name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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*ptr = (struct expression *)0;
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#endif
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}
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*ptr = src;
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src -> refcnt++;
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return 1;
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}
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struct option_cache *free_option_caches;
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int option_cache_allocate (cptr, name)
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struct option_cache **cptr;
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const char *name;
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{
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struct option_cache *rval;
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if (free_option_caches) {
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rval = free_option_caches;
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free_option_caches =
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(struct option_cache *)(rval -> expression);
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} else {
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rval = dmalloc (sizeof (struct option_cache), name);
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if (!rval)
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return 0;
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}
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memset (rval, 0, sizeof *rval);
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return option_cache_reference (cptr, rval, name);
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}
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int option_cache_reference (ptr, src, name)
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struct option_cache **ptr;
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struct option_cache *src;
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const char *name;
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{
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if (!ptr) {
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log_error ("Null pointer in option_cache_reference: %s", name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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return 0;
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#endif
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}
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if (*ptr) {
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log_error ("Non-null pointer in option_cache_reference (%s)",
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name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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*ptr = (struct option_cache *)0;
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#endif
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}
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*ptr = src;
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src -> refcnt++;
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return 1;
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}
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int buffer_allocate (ptr, len, name)
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struct buffer **ptr;
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unsigned len;
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const char *name;
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{
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struct buffer *bp;
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bp = dmalloc (len + sizeof *bp, name);
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if (!bp)
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return 0;
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memset (bp, 0, sizeof *bp);
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bp -> refcnt = 0;
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return buffer_reference (ptr, bp, name);
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}
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int buffer_reference (ptr, bp, name)
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struct buffer **ptr;
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struct buffer *bp;
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const char *name;
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{
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if (!ptr) {
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log_error ("Null pointer passed to buffer_reference: %s",
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name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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return 0;
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#endif
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}
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if (*ptr) {
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log_error ("Non-null pointer in buffer_reference (%s)", name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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*ptr = (struct buffer *)0;
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#endif
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}
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*ptr = bp;
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bp -> refcnt++;
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return 1;
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}
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int buffer_dereference (ptr, name)
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struct buffer **ptr;
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const char *name;
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{
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struct buffer *bp;
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if (!ptr) {
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log_error ("Null pointer passed to buffer_dereference: %s",
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name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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return 0;
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#endif
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}
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if (!*ptr) {
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log_error ("Null pointer in buffer_dereference: %s", name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
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return 0;
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#endif
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}
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(*ptr) -> refcnt--;
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if (!(*ptr) -> refcnt)
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dfree ((*ptr), name);
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*ptr = (struct buffer *)0;
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return 1;
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}
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int dns_host_entry_allocate (ptr, hostname, name)
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struct dns_host_entry **ptr;
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const char *hostname;
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const char *name;
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{
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struct dns_host_entry *bp;
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bp = dmalloc (strlen (hostname) + sizeof *bp, name);
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if (!bp)
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return 0;
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memset (bp, 0, sizeof *bp);
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bp -> refcnt = 0;
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strcpy (bp -> hostname, hostname);
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return dns_host_entry_reference (ptr, bp, name);
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}
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int dns_host_entry_reference (ptr, bp, name)
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struct dns_host_entry **ptr;
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struct dns_host_entry *bp;
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const char *name;
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{
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if (!ptr) {
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log_error ("Null pointer in dns_host_entry_reference: %s",
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name);
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#if defined (POINTER_DEBUG)
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abort ();
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#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
if (*ptr) {
|
|
log_error ("Non-null pointer in dns_host_entry_reference (%s)",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
*ptr = (struct dns_host_entry *)0;
|
|
#endif
|
|
}
|
|
*ptr = bp;
|
|
bp -> refcnt++;
|
|
return 1;
|
|
}
|
|
|
|
int dns_host_entry_dereference (ptr, name)
|
|
struct dns_host_entry **ptr;
|
|
const char *name;
|
|
{
|
|
struct dns_host_entry *bp;
|
|
|
|
if (!ptr || !*ptr) {
|
|
log_error ("Null pointer in dns_host_entry_dereference: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
(*ptr) -> refcnt--;
|
|
if (!(*ptr) -> refcnt)
|
|
dfree ((*ptr), name);
|
|
*ptr = (struct dns_host_entry *)0;
|
|
return 1;
|
|
}
|
|
|
|
int option_state_allocate (ptr, name)
|
|
struct option_state **ptr;
|
|
const char *name;
|
|
{
|
|
unsigned size;
|
|
|
|
if (!ptr) {
|
|
log_error ("Null pointer passed to option_state_allocate: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
if (*ptr) {
|
|
log_error ("Non-null pointer in option_state_allocate (%s)",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
*ptr = (struct option_state *)0;
|
|
#endif
|
|
}
|
|
|
|
size = sizeof **ptr + (universe_count - 1) * sizeof (VOIDPTR);
|
|
*ptr = dmalloc (size, name);
|
|
if (*ptr) {
|
|
memset (*ptr, 0, size);
|
|
(*ptr) -> universe_count = universe_count;
|
|
(*ptr) -> refcnt = 1;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int option_state_reference (ptr, bp, name)
|
|
struct option_state **ptr;
|
|
struct option_state *bp;
|
|
const char *name;
|
|
{
|
|
if (!ptr) {
|
|
log_error ("Null pointer in option_state_reference: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
if (*ptr) {
|
|
log_error ("Non-null pointer in option_state_reference (%s)",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
*ptr = (struct option_state *)0;
|
|
#endif
|
|
}
|
|
*ptr = bp;
|
|
bp -> refcnt++;
|
|
return 1;
|
|
}
|
|
|
|
int option_state_dereference (ptr, name)
|
|
struct option_state **ptr;
|
|
const char *name;
|
|
{
|
|
int i;
|
|
struct option_state *options;
|
|
|
|
if (!ptr || !*ptr) {
|
|
log_error ("Null pointer in option_state_dereference: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
options = *ptr;
|
|
*ptr = (struct option_state *)0;
|
|
--options -> refcnt;
|
|
if (options -> refcnt)
|
|
return 1;
|
|
|
|
/* Loop through the per-universe state. */
|
|
for (i = 0; i < options -> universe_count; i++)
|
|
if (options -> universes [i] &&
|
|
universes [i] -> option_state_dereference)
|
|
((*(universes [i] -> option_state_dereference))
|
|
(universes [i], options));
|
|
|
|
dfree (options, name);
|
|
return 1;
|
|
}
|
|
|
|
int executable_statement_allocate (ptr, name)
|
|
struct executable_statement **ptr;
|
|
const char *name;
|
|
{
|
|
struct executable_statement *bp;
|
|
|
|
bp = dmalloc (sizeof *bp, name);
|
|
if (!bp)
|
|
return 0;
|
|
memset (bp, 0, sizeof *bp);
|
|
bp -> refcnt = 0;
|
|
return executable_statement_reference (ptr, bp, name);
|
|
}
|
|
|
|
int executable_statement_reference (ptr, bp, name)
|
|
struct executable_statement **ptr;
|
|
struct executable_statement *bp;
|
|
const char *name;
|
|
{
|
|
if (!ptr) {
|
|
log_error ("Null ptr in executable_statement_reference: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
if (*ptr) {
|
|
log_error ("Nonnull ptr in executable_statement_reference: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
*ptr = (struct executable_statement *)0;
|
|
#endif
|
|
}
|
|
*ptr = bp;
|
|
bp -> refcnt++;
|
|
return 1;
|
|
}
|
|
|
|
static struct packet *free_packets;
|
|
|
|
int packet_allocate (ptr, name)
|
|
struct packet **ptr;
|
|
const char *name;
|
|
{
|
|
int size;
|
|
|
|
if (!ptr) {
|
|
log_error ("Null pointer passed to packet_allocate: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
if (*ptr) {
|
|
log_error ("Non-null pointer in packet_allocate (%s)",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
*ptr = (struct packet *)0;
|
|
#endif
|
|
}
|
|
|
|
*ptr = dmalloc (sizeof **ptr, name);
|
|
if (*ptr) {
|
|
memset (*ptr, 0, sizeof **ptr);
|
|
(*ptr) -> refcnt = 1;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int packet_reference (ptr, bp, name)
|
|
struct packet **ptr;
|
|
struct packet *bp;
|
|
const char *name;
|
|
{
|
|
if (!ptr) {
|
|
log_error ("Null pointer in packet_reference: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
if (*ptr) {
|
|
log_error ("Non-null pointer in packet_reference (%s)",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
*ptr = (struct packet *)0;
|
|
#endif
|
|
}
|
|
*ptr = bp;
|
|
bp -> refcnt++;
|
|
return 1;
|
|
}
|
|
|
|
int packet_dereference (ptr, name)
|
|
struct packet **ptr;
|
|
const char *name;
|
|
{
|
|
int i;
|
|
struct packet *packet;
|
|
|
|
if (!ptr || !*ptr) {
|
|
log_error ("Null pointer in packet_dereference: %s",
|
|
name);
|
|
#if defined (POINTER_DEBUG)
|
|
abort ();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
packet = *ptr;
|
|
*ptr = (struct packet *)0;
|
|
--packet -> refcnt;
|
|
if (packet -> refcnt)
|
|
return 1;
|
|
|
|
if (packet -> options)
|
|
option_state_dereference (&packet -> options, name);
|
|
packet -> raw = (struct dhcp_packet *)free_packets;
|
|
free_packets = packet;
|
|
return 1;
|
|
}
|