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authorerwin <erwin@FreeBSD.org>2013-08-22 08:15:03 +0000
committererwin <erwin@FreeBSD.org>2013-08-22 08:15:03 +0000
commit6a288ef517fece2ca5a21d081efd7b4a81da0053 (patch)
tree37271fd86c9be9a6bab12a7aebd85ccfbb8a7b62 /contrib/bind9/lib/isc/pool.c
parent0b46e38a09fbccfdfd7bca0f387c66b2c64fa5b6 (diff)
parentf32b4abce98c97ee6e51b7aa8f8fde6e4cab7f28 (diff)
downloadFreeBSD-src-6a288ef517fece2ca5a21d081efd7b4a81da0053.zip
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Update Bind to 9.9.3-P2
Notable new features: * Elliptic Curve Digital Signature Algorithm keys and signatures in DNSSEC are now supported per RFC 6605. [RT #21918] * Introduces a new tool "dnssec-verify" that validates a signed zone, checking for the correctness of signatures and NSEC/NSEC3 chains. [RT #23673] * BIND now recognizes the TLSA resource record type, created to support IETF DANE (DNS-based Authentication of Named Entities) [RT #28989] * The new "inline-signing" option, in combination with the "auto-dnssec" option that was introduced in BIND 9.7, allows named to sign zones completely transparently. Approved by: delphij (mentor) MFC after: 3 days Sponsored by: DK Hostmaster A/S
Diffstat (limited to 'contrib/bind9/lib/isc/pool.c')
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1 files changed, 177 insertions, 0 deletions
diff --git a/contrib/bind9/lib/isc/pool.c b/contrib/bind9/lib/isc/pool.c
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+/*
+ * Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id$ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <string.h>
+
+#include <isc/mem.h>
+#include <isc/random.h>
+#include <isc/pool.h>
+#include <isc/util.h>
+
+/***
+ *** Types.
+ ***/
+
+struct isc_pool {
+ isc_mem_t * mctx;
+ unsigned int count;
+ isc_pooldeallocator_t free;
+ isc_poolinitializer_t init;
+ void * initarg;
+ void ** pool;
+};
+
+/***
+ *** Functions.
+ ***/
+
+static isc_result_t
+alloc_pool(isc_mem_t *mctx, unsigned int count, isc_pool_t **poolp) {
+ isc_pool_t *pool;
+
+ pool = isc_mem_get(mctx, sizeof(*pool));
+ if (pool == NULL)
+ return (ISC_R_NOMEMORY);
+ pool->count = count;
+ pool->free = NULL;
+ pool->init = NULL;
+ pool->initarg = NULL;
+ pool->mctx = NULL;
+ isc_mem_attach(mctx, &pool->mctx);
+ pool->pool = isc_mem_get(mctx, count * sizeof(void *));
+ if (pool->pool == NULL) {
+ isc_mem_put(mctx, pool, sizeof(*pool));
+ return (ISC_R_NOMEMORY);
+ }
+ memset(pool->pool, 0, count * sizeof(void *));
+
+ *poolp = pool;
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_pool_create(isc_mem_t *mctx, unsigned int count,
+ isc_pooldeallocator_t free,
+ isc_poolinitializer_t init, void *initarg,
+ isc_pool_t **poolp)
+{
+ isc_pool_t *pool = NULL;
+ isc_result_t result;
+ unsigned int i;
+
+ INSIST(count > 0);
+
+ /* Allocate the pool structure */
+ result = alloc_pool(mctx, count, &pool);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ pool->free = free;
+ pool->init = init;
+ pool->initarg = initarg;
+
+ /* Populate the pool */
+ for (i = 0; i < count; i++) {
+ result = init(&pool->pool[i], initarg);
+ if (result != ISC_R_SUCCESS) {
+ isc_pool_destroy(&pool);
+ return (result);
+ }
+ }
+
+ *poolp = pool;
+ return (ISC_R_SUCCESS);
+}
+
+void *
+isc_pool_get(isc_pool_t *pool) {
+ isc_uint32_t i;
+ isc_random_get(&i);
+ return (pool->pool[i % pool->count]);
+}
+
+int
+isc_pool_count(isc_pool_t *pool) {
+ REQUIRE(pool != NULL);
+ return (pool->count);
+}
+
+isc_result_t
+isc_pool_expand(isc_pool_t **sourcep, unsigned int count,
+ isc_pool_t **targetp)
+{
+ isc_result_t result;
+ isc_pool_t *pool;
+
+ REQUIRE(sourcep != NULL && *sourcep != NULL);
+ REQUIRE(targetp != NULL && *targetp == NULL);
+
+ pool = *sourcep;
+ if (count > pool->count) {
+ isc_pool_t *newpool = NULL;
+ unsigned int i;
+
+ /* Allocate a new pool structure */
+ result = alloc_pool(pool->mctx, count, &newpool);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ newpool->free = pool->free;
+ newpool->init = pool->init;
+ newpool->initarg = pool->initarg;
+
+ /* Copy over the objects from the old pool */
+ for (i = 0; i < pool->count; i++) {
+ newpool->pool[i] = pool->pool[i];
+ pool->pool[i] = NULL;
+ }
+
+ /* Populate the new entries */
+ for (i = pool->count; i < count; i++) {
+ result = pool->init(&newpool->pool[i], pool->initarg);
+ if (result != ISC_R_SUCCESS) {
+ isc_pool_destroy(&pool);
+ return (result);
+ }
+ }
+
+ isc_pool_destroy(&pool);
+ pool = newpool;
+ }
+
+ *sourcep = NULL;
+ *targetp = pool;
+ return (ISC_R_SUCCESS);
+}
+
+void
+isc_pool_destroy(isc_pool_t **poolp) {
+ unsigned int i;
+ isc_pool_t *pool = *poolp;
+ for (i = 0; i < pool->count; i++) {
+ if (pool->free != NULL && pool->pool[i] != NULL)
+ pool->free(&pool->pool[i]);
+ }
+ isc_mem_put(pool->mctx, pool->pool, pool->count * sizeof(void *));
+ isc_mem_putanddetach(&pool->mctx, pool, sizeof(*pool));
+ *poolp = NULL;
+}
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