NetBSD/dist/dhcp/server/salloc.c

268 lines
7.4 KiB
C

/* salloc.c
Memory allocation for the DHCP server... */
/*
* Copyright (c) 1996-2002 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 in cooperation with Vixie Enterprises and Nominum, Inc.
* To learn more about the Internet Software Consortium, see
* ``http://www.isc.org/''. To learn more about Vixie Enterprises,
* see ``http://www.vix.com''. To learn more about Nominum, Inc., see
* ``http://www.nominum.com''.
*/
#ifndef lint
static char copyright[] =
"$Id: salloc.c,v 1.2 2003/02/18 17:08:45 drochner Exp $ Copyright (c) 1996-2002 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */
#include "dhcpd.h"
#include <omapip/omapip_p.h>
#if defined (COMPACT_LEASES)
struct lease *free_leases;
# if defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
struct lease *lease_hunks;
void relinquish_lease_hunks ()
{
struct lease *c, *n, **p, *f;
int i;
/* Account for all the leases on the free list. */
for (n = lease_hunks; n; n = n -> next) {
for (i = 1; i < n -> starts + 1; i++) {
p = &free_leases;
for (c = free_leases; c; c = c -> next) {
if (c == &n [i]) {
*p = c -> next;
n -> ends++;
break;
}
p = &c -> next;
}
if (!c) {
log_info ("lease %s refcnt %d",
piaddr (n [i].ip_addr), n [i].refcnt);
dump_rc_history (&n [i]);
}
}
}
for (c = lease_hunks; c; c = n) {
n = c -> next;
if (c -> ends != c -> starts) {
log_info ("lease hunk %lx leases %ld free %ld",
(unsigned long)c, (unsigned long)c -> starts,
(unsigned long)c -> ends);
}
dfree (c, MDL);
}
/* Free all the rogue leases. */
for (c = free_leases; c; c = n) {
n = c -> next;
dfree (c, MDL);
}
}
#endif
struct lease *new_leases (n, file, line)
unsigned n;
const char *file;
int line;
{
struct lease *rval;
#if defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
rval = dmalloc ((n + 1) * sizeof (struct lease), file, line);
memset (rval, 0, sizeof (struct lease));
rval -> starts = n;
rval -> next = lease_hunks;
lease_hunks = rval;
rval++;
#else
rval = dmalloc (n * sizeof (struct lease), file, line);
#endif
return rval;
}
/* If we are allocating leases in aggregations, there's really no way
to free one, although perhaps we can maintain a free list. */
isc_result_t dhcp_lease_free (omapi_object_t *lo,
const char *file, int line)
{
struct lease *lease;
if (lo -> type != dhcp_type_lease)
return ISC_R_INVALIDARG;
lease = (struct lease *)lo;
memset (lease, 0, sizeof (struct lease));
lease -> next = free_leases;
free_leases = lease;
return ISC_R_SUCCESS;
}
isc_result_t dhcp_lease_get (omapi_object_t **lp,
const char *file, int line)
{
struct lease **lease = (struct lease **)lp;
struct lease *lt;
if (free_leases) {
lt = free_leases;
free_leases = lt -> next;
*lease = lt;
return ISC_R_SUCCESS;
}
return ISC_R_NOMEMORY;
}
#endif /* COMPACT_LEASES */
OMAPI_OBJECT_ALLOC (lease, struct lease, dhcp_type_lease)
OMAPI_OBJECT_ALLOC (class, struct class, dhcp_type_class)
OMAPI_OBJECT_ALLOC (pool, struct pool, dhcp_type_pool)
#if !defined (NO_HOST_FREES) /* Scary debugging mode - don't enable! */
OMAPI_OBJECT_ALLOC (host, struct host_decl, dhcp_type_host)
#else
isc_result_t host_allocate (struct host_decl **p, const char *file, int line)
{
return omapi_object_allocate ((omapi_object_t **)p,
dhcp_type_host, 0, file, line);
}
isc_result_t host_reference (struct host_decl **pptr, struct host_decl *ptr,
const char *file, int line)
{
return omapi_object_reference ((omapi_object_t **)pptr,
(omapi_object_t *)ptr, file, line);
}
isc_result_t host_dereference (struct host_decl **ptr,
const char *file, int line)
{
if ((*ptr) -> refcnt == 1) {
log_error ("host dereferenced with refcnt == 1.");
#if defined (DEBUG_RC_HISTORY)
dump_rc_history ();
#endif
abort ();
}
return omapi_object_dereference ((omapi_object_t **)ptr, file, line);
}
#endif
struct lease_state *free_lease_states;
struct lease_state *new_lease_state (file, line)
const char *file;
int line;
{
struct lease_state *rval;
if (free_lease_states) {
rval = free_lease_states;
free_lease_states =
(struct lease_state *)(free_lease_states -> next);
dmalloc_reuse (rval, file, line, 0);
} else {
rval = dmalloc (sizeof (struct lease_state), file, line);
if (!rval)
return rval;
}
memset (rval, 0, sizeof *rval);
if (!option_state_allocate (&rval -> options, file, line)) {
free_lease_state (rval, file, line);
return (struct lease_state *)0;
}
return rval;
}
void free_lease_state (ptr, file, line)
struct lease_state *ptr;
const char *file;
int line;
{
if (ptr -> options)
option_state_dereference (&ptr -> options, file, line);
if (ptr -> packet)
packet_dereference (&ptr -> packet, file, line);
if (ptr -> shared_network)
shared_network_dereference (&ptr -> shared_network,
file, line);
data_string_forget (&ptr -> parameter_request_list, file, line);
data_string_forget (&ptr -> filename, file, line);
data_string_forget (&ptr -> server_name, file, line);
ptr -> next = free_lease_states;
free_lease_states = ptr;
dmalloc_reuse (free_lease_states, (char *)0, 0, 0);
}
#if defined (DEBUG_MEMORY_LEAKAGE) || \
defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
void relinquish_free_lease_states ()
{
struct lease_state *cs, *ns;
for (cs = free_lease_states; cs; cs = ns) {
ns = cs -> next;
dfree (cs, MDL);
}
free_lease_states = (struct lease_state *)0;
}
#endif
struct permit *new_permit (file, line)
const char *file;
int line;
{
struct permit *permit = ((struct permit *)
dmalloc (sizeof (struct permit), file, line));
if (!permit)
return permit;
memset (permit, 0, sizeof *permit);
return permit;
}
void free_permit (permit, file, line)
struct permit *permit;
const char *file;
int line;
{
if (permit -> type == permit_class)
class_dereference (&permit -> class, MDL);
dfree (permit, file, line);
}