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-rw-r--r--lib/isc/tests/buffer_test.c351
1 files changed, 351 insertions, 0 deletions
diff --git a/lib/isc/tests/buffer_test.c b/lib/isc/tests/buffer_test.c
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+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#if HAVE_CMOCKA
+
+#include <fcntl.h>
+#include <limits.h>
+#include <sched.h> /* IWYU pragma: keep */
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define UNIT_TESTING
+#include <cmocka.h>
+
+#include <isc/buffer.h>
+#include <isc/print.h>
+#include <isc/region.h>
+#include <isc/result.h>
+#include <isc/types.h>
+#include <isc/util.h>
+
+#include "isctest.h"
+
+static int
+_setup(void **state) {
+ isc_result_t result;
+
+ UNUSED(state);
+
+ result = isc_test_begin(NULL, true, 0);
+ assert_int_equal(result, ISC_R_SUCCESS);
+
+ return (0);
+}
+
+static int
+_teardown(void **state) {
+ UNUSED(state);
+
+ isc_test_end();
+
+ return (0);
+}
+
+/* reserve space in dynamic buffers */
+static void
+isc_buffer_reserve_test(void **state) {
+ isc_result_t result;
+ isc_buffer_t *b;
+
+ UNUSED(state);
+
+ b = NULL;
+ isc_buffer_allocate(test_mctx, &b, 1024);
+ assert_int_equal(b->length, 1024);
+
+ /*
+ * 1024 bytes should already be available, so this call does
+ * nothing.
+ */
+ result = isc_buffer_reserve(&b, 1024);
+ assert_int_equal(result, ISC_R_SUCCESS);
+ assert_true(ISC_BUFFER_VALID(b));
+ assert_non_null(b);
+ assert_int_equal(b->length, 1024);
+
+ /*
+ * This call should grow it to 2048 bytes as only 1024 bytes are
+ * available in the buffer.
+ */
+ result = isc_buffer_reserve(&b, 1025);
+ assert_int_equal(result, ISC_R_SUCCESS);
+ assert_true(ISC_BUFFER_VALID(b));
+ assert_non_null(b);
+ assert_int_equal(b->length, 2048);
+
+ /*
+ * 2048 bytes should already be available, so this call does
+ * nothing.
+ */
+ result = isc_buffer_reserve(&b, 2000);
+ assert_int_equal(result, ISC_R_SUCCESS);
+ assert_true(ISC_BUFFER_VALID(b));
+ assert_non_null(b);
+ assert_int_equal(b->length, 2048);
+
+ /*
+ * This call should grow it to 4096 bytes as only 2048 bytes are
+ * available in the buffer.
+ */
+ result = isc_buffer_reserve(&b, 3000);
+ assert_int_equal(result, ISC_R_SUCCESS);
+ assert_true(ISC_BUFFER_VALID(b));
+ assert_non_null(b);
+ assert_int_equal(b->length, 4096);
+
+ /* Consume some of the buffer so we can run the next test. */
+ isc_buffer_add(b, 4096);
+
+ /*
+ * This call should fail and leave buffer untouched.
+ */
+ result = isc_buffer_reserve(&b, UINT_MAX);
+ assert_int_equal(result, ISC_R_NOMEMORY);
+ assert_true(ISC_BUFFER_VALID(b));
+ assert_non_null(b);
+ assert_int_equal(b->length, 4096);
+
+ isc_buffer_free(&b);
+}
+
+/* dynamic buffer automatic reallocation */
+static void
+isc_buffer_dynamic_test(void **state) {
+ isc_buffer_t *b;
+ size_t last_length = 10;
+ int i;
+
+ UNUSED(state);
+
+ b = NULL;
+ isc_buffer_allocate(test_mctx, &b, last_length);
+ assert_non_null(b);
+ assert_int_equal(b->length, last_length);
+
+ isc_buffer_setautorealloc(b, true);
+
+ isc_buffer_putuint8(b, 1);
+
+ for (i = 0; i < 1000; i++) {
+ isc_buffer_putstr(b, "thisisa24charslongstring");
+ }
+ assert_true(b->length - last_length >= 1000 * 24);
+ last_length += 1000 * 24;
+
+ for (i = 0; i < 10000; i++) {
+ isc_buffer_putuint8(b, 1);
+ }
+
+ assert_true(b->length - last_length >= 10000 * 1);
+ last_length += 10000 * 1;
+
+ for (i = 0; i < 10000; i++) {
+ isc_buffer_putuint16(b, 1);
+ }
+
+ assert_true(b->length - last_length >= 10000 * 2);
+
+ last_length += 10000 * 2;
+ for (i = 0; i < 10000; i++) {
+ isc_buffer_putuint24(b, 1);
+ }
+ assert_true(b->length - last_length >= 10000 * 3);
+
+ last_length += 10000 * 3;
+
+ for (i = 0; i < 10000; i++) {
+ isc_buffer_putuint32(b, 1);
+ }
+ assert_true(b->length - last_length >= 10000 * 4);
+
+ isc_buffer_free(&b);
+}
+
+/* copy a region into a buffer */
+static void
+isc_buffer_copyregion_test(void **state) {
+ unsigned char data[] = { 0x11, 0x22, 0x33, 0x44 };
+ isc_buffer_t *b = NULL;
+ isc_result_t result;
+
+ isc_region_t r = {
+ .base = data,
+ .length = sizeof(data),
+ };
+
+ UNUSED(state);
+
+ isc_buffer_allocate(test_mctx, &b, sizeof(data));
+
+ /*
+ * Fill originally allocated buffer space.
+ */
+ result = isc_buffer_copyregion(b, &r);
+ assert_int_equal(result, ISC_R_SUCCESS);
+
+ /*
+ * Appending more data to the buffer should fail.
+ */
+ result = isc_buffer_copyregion(b, &r);
+ assert_int_equal(result, ISC_R_NOSPACE);
+
+ /*
+ * Enable auto reallocation and retry. Appending should now succeed.
+ */
+ isc_buffer_setautorealloc(b, true);
+ result = isc_buffer_copyregion(b, &r);
+ assert_int_equal(result, ISC_R_SUCCESS);
+
+ isc_buffer_free(&b);
+}
+
+/* sprintf() into a buffer */
+static void
+isc_buffer_printf_test(void **state) {
+ unsigned int used, prev_used;
+ const char *empty_fmt;
+ isc_result_t result;
+ isc_buffer_t *b, sb;
+ char buf[8];
+
+ UNUSED(state);
+
+ /*
+ * Prepare a buffer with auto-reallocation enabled.
+ */
+ b = NULL;
+ isc_buffer_allocate(test_mctx, &b, 0);
+ isc_buffer_setautorealloc(b, true);
+
+ /*
+ * Sanity check.
+ */
+ result = isc_buffer_printf(b, "foo");
+ assert_int_equal(result, ISC_R_SUCCESS);
+ used = isc_buffer_usedlength(b);
+ assert_int_equal(used, 3);
+
+ result = isc_buffer_printf(b, "bar");
+ assert_int_equal(result, ISC_R_SUCCESS);
+ used = isc_buffer_usedlength(b);
+ assert_int_equal(used, 3 + 3);
+
+ /*
+ * Also check the terminating NULL byte is there, even though it is not
+ * part of the buffer's used region.
+ */
+ assert_memory_equal(isc_buffer_current(b), "foobar", 7);
+
+ /*
+ * Skip over data from previous check to prevent failures in previous
+ * check from affecting this one.
+ */
+ prev_used = used;
+ isc_buffer_forward(b, prev_used);
+
+ /*
+ * Some standard usage checks.
+ */
+ isc_buffer_printf(b, "%d", 42);
+ used = isc_buffer_usedlength(b);
+ assert_int_equal(used - prev_used, 2);
+
+ isc_buffer_printf(b, "baz%1X", 42);
+ used = isc_buffer_usedlength(b);
+ assert_int_equal(used - prev_used, 2 + 5);
+
+ isc_buffer_printf(b, "%6.1f", 42.42f);
+ used = isc_buffer_usedlength(b);
+ assert_int_equal(used - prev_used, 2 + 5 + 6);
+
+ /*
+ * Also check the terminating NULL byte is there, even though it is not
+ * part of the buffer's used region.
+ */
+ assert_memory_equal(isc_buffer_current(b), "42baz2A 42.4", 14);
+
+ /*
+ * Check an empty format string is properly handled.
+ *
+ * Note: we don't use a string literal for the format string to
+ * avoid triggering [-Werror=format-zero-length].
+ * Note: we have a dummy third argument as some compilers complain
+ * without it.
+ */
+ prev_used = used;
+ empty_fmt = "";
+ result = isc_buffer_printf(b, empty_fmt, "");
+ assert_int_equal(result, ISC_R_SUCCESS);
+ used = isc_buffer_usedlength(b);
+ assert_int_equal(prev_used, used);
+
+ isc_buffer_free(&b);
+
+ /*
+ * Check overflow on a static buffer.
+ */
+ isc_buffer_init(&sb, buf, sizeof(buf));
+ result = isc_buffer_printf(&sb, "123456");
+ assert_int_equal(result, ISC_R_SUCCESS);
+ used = isc_buffer_usedlength(&sb);
+ assert_int_equal(used, 6);
+
+ result = isc_buffer_printf(&sb, "789");
+ assert_int_equal(result, ISC_R_NOSPACE);
+ used = isc_buffer_usedlength(&sb);
+ assert_int_equal(used, 6);
+
+ result = isc_buffer_printf(&sb, "78");
+ assert_int_equal(result, ISC_R_NOSPACE);
+ used = isc_buffer_usedlength(&sb);
+ assert_int_equal(used, 6);
+
+ result = isc_buffer_printf(&sb, "7");
+ assert_int_equal(result, ISC_R_SUCCESS);
+ used = isc_buffer_usedlength(&sb);
+ assert_int_equal(used, 7);
+}
+
+int
+main(void) {
+ const struct CMUnitTest tests[] = {
+ cmocka_unit_test_setup_teardown(isc_buffer_reserve_test, _setup,
+ _teardown),
+ cmocka_unit_test_setup_teardown(isc_buffer_dynamic_test, _setup,
+ _teardown),
+ cmocka_unit_test_setup_teardown(isc_buffer_copyregion_test,
+ _setup, _teardown),
+ cmocka_unit_test_setup_teardown(isc_buffer_printf_test, _setup,
+ _teardown),
+ };
+
+ return (cmocka_run_group_tests(tests, NULL, NULL));
+}
+
+#else /* HAVE_CMOCKA */
+
+#include <stdio.h>
+
+int
+main(void) {
+ printf("1..0 # Skipped: cmocka not available\n");
+ return (SKIPPED_TEST_EXIT_CODE);
+}
+
+#endif /* if HAVE_CMOCKA */