259 lines
6.8 KiB
C
259 lines
6.8 KiB
C
/* salloc.c
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Memory allocation for the DHCP server... */
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/*
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 1996-2003 by Internet Software Consortium
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Internet Systems Consortium, Inc.
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* 950 Charter Street
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* Redwood City, CA 94063
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* <info@isc.org>
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* http://www.isc.org/
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*
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* This software has been written for Internet Systems Consortium
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* by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
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* To learn more about Internet Systems Consortium, see
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* ``http://www.isc.org/''. To learn more about Vixie Enterprises,
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* see ``http://www.vix.com''. To learn more about Nominum, Inc., see
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* ``http://www.nominum.com''.
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*/
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#ifndef lint
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static char copyright[] =
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"$Id: salloc.c,v 1.3 2005/08/11 17:13:30 drochner Exp $ Copyright (c) 2004 Internet Systems Consortium. All rights reserved.\n";
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#endif /* not lint */
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#include "dhcpd.h"
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#include <omapip/omapip_p.h>
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#if defined (COMPACT_LEASES)
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struct lease *free_leases;
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# if defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
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struct lease *lease_hunks;
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void relinquish_lease_hunks ()
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{
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struct lease *c, *n, **p, *f;
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int i;
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/* Account for all the leases on the free list. */
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for (n = lease_hunks; n; n = n -> next) {
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for (i = 1; i < n -> starts + 1; i++) {
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p = &free_leases;
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for (c = free_leases; c; c = c -> next) {
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if (c == &n [i]) {
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*p = c -> next;
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n -> ends++;
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break;
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}
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p = &c -> next;
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}
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if (!c) {
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log_info ("lease %s refcnt %d",
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piaddr (n [i].ip_addr), n [i].refcnt);
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dump_rc_history (&n [i]);
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}
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}
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}
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for (c = lease_hunks; c; c = n) {
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n = c -> next;
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if (c -> ends != c -> starts) {
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log_info ("lease hunk %lx leases %ld free %ld",
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(unsigned long)c, (unsigned long)c -> starts,
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(unsigned long)c -> ends);
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}
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dfree (c, MDL);
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}
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/* Free all the rogue leases. */
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for (c = free_leases; c; c = n) {
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n = c -> next;
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dfree (c, MDL);
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}
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}
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#endif
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struct lease *new_leases (n, file, line)
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unsigned n;
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const char *file;
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int line;
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{
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struct lease *rval;
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#if defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
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rval = dmalloc ((n + 1) * sizeof (struct lease), file, line);
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memset (rval, 0, sizeof (struct lease));
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rval -> starts = n;
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rval -> next = lease_hunks;
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lease_hunks = rval;
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rval++;
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#else
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rval = dmalloc (n * sizeof (struct lease), file, line);
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#endif
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return rval;
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}
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/* If we are allocating leases in aggregations, there's really no way
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to free one, although perhaps we can maintain a free list. */
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isc_result_t dhcp_lease_free (omapi_object_t *lo,
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const char *file, int line)
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{
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struct lease *lease;
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if (lo -> type != dhcp_type_lease)
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return ISC_R_INVALIDARG;
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lease = (struct lease *)lo;
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memset (lease, 0, sizeof (struct lease));
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lease -> next = free_leases;
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free_leases = lease;
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return ISC_R_SUCCESS;
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}
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isc_result_t dhcp_lease_get (omapi_object_t **lp,
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const char *file, int line)
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{
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struct lease **lease = (struct lease **)lp;
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struct lease *lt;
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if (free_leases) {
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lt = free_leases;
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free_leases = lt -> next;
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*lease = lt;
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return ISC_R_SUCCESS;
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}
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return ISC_R_NOMEMORY;
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}
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#endif /* COMPACT_LEASES */
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OMAPI_OBJECT_ALLOC (lease, struct lease, dhcp_type_lease)
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OMAPI_OBJECT_ALLOC (class, struct class, dhcp_type_class)
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OMAPI_OBJECT_ALLOC (pool, struct pool, dhcp_type_pool)
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#if !defined (NO_HOST_FREES) /* Scary debugging mode - don't enable! */
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OMAPI_OBJECT_ALLOC (host, struct host_decl, dhcp_type_host)
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#else
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isc_result_t host_allocate (struct host_decl **p, const char *file, int line)
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{
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return omapi_object_allocate ((omapi_object_t **)p,
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dhcp_type_host, 0, file, line);
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}
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isc_result_t host_reference (struct host_decl **pptr, struct host_decl *ptr,
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const char *file, int line)
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{
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return omapi_object_reference ((omapi_object_t **)pptr,
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(omapi_object_t *)ptr, file, line);
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}
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isc_result_t host_dereference (struct host_decl **ptr,
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const char *file, int line)
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{
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if ((*ptr) -> refcnt == 1) {
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log_error ("host dereferenced with refcnt == 1.");
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#if defined (DEBUG_RC_HISTORY)
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dump_rc_history ();
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#endif
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abort ();
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}
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return omapi_object_dereference ((omapi_object_t **)ptr, file, line);
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}
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#endif
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struct lease_state *free_lease_states;
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struct lease_state *new_lease_state (file, line)
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const char *file;
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int line;
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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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dmalloc_reuse (rval, file, line, 0);
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} else {
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rval = dmalloc (sizeof (struct lease_state), file, line);
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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, file, line)) {
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free_lease_state (rval, file, line);
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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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void free_lease_state (ptr, file, line)
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struct lease_state *ptr;
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const char *file;
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int line;
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{
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if (ptr -> options)
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option_state_dereference (&ptr -> options, file, line);
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if (ptr -> packet)
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packet_dereference (&ptr -> packet, file, line);
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if (ptr -> shared_network)
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shared_network_dereference (&ptr -> shared_network,
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file, line);
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data_string_forget (&ptr -> parameter_request_list, file, line);
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data_string_forget (&ptr -> filename, file, line);
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data_string_forget (&ptr -> server_name, file, line);
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ptr -> next = free_lease_states;
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free_lease_states = ptr;
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dmalloc_reuse (free_lease_states, (char *)0, 0, 0);
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}
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#if defined (DEBUG_MEMORY_LEAKAGE) || \
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defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
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void relinquish_free_lease_states ()
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{
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struct lease_state *cs, *ns;
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for (cs = free_lease_states; cs; cs = ns) {
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ns = cs -> next;
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dfree (cs, MDL);
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}
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free_lease_states = (struct lease_state *)0;
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}
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#endif
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struct permit *new_permit (file, line)
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const char *file;
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int line;
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{
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struct permit *permit = ((struct permit *)
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dmalloc (sizeof (struct permit), file, line));
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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, file, line)
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struct permit *permit;
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const char *file;
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int line;
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{
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if (permit -> type == permit_class)
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class_dereference (&permit -> class, MDL);
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dfree (permit, file, line);
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}
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