1 files changed, 160 insertions, 0 deletions
diff --git a/src/lib/util/tests/io_utilities_unittest.cc b/src/lib/util/tests/io_utilities_unittest.cc
new file mode 100644
index 0000000..acaaf13
--- /dev/null
+++ b/src/lib/util/tests/io_utilities_unittest.cc
@@ -0,0 +1,160 @@
+// Copyright (C) 2011-2022 Internet Systems Consortium, Inc. ("ISC")
+//
+// 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 http://mozilla.org/MPL/2.0/.
+
+/// \brief Test of asiolink utilities
+///
+/// Tests the functionality of the asiolink utilities code by comparing them
+/// with the equivalent methods in isc::dns::[Input/Output]Buffer.
+
+#include <config.h>
+
+#include <cstddef>
+
+#include <arpa/inet.h>
+#include <gtest/gtest.h>
+
+#include <util/buffer.h>
+#include <util/io_utilities.h>
+
+using namespace isc::util;
+
+TEST(asioutil, readUint16) {
+
+    // Reference buffer
+    uint8_t data[2] = {0, 0};
+    InputBuffer buffer(data, sizeof(data));
+
+    // Avoid possible compiler warnings by only setting uint8_t variables to
+    // uint8_t values.
+    uint8_t i8 = 0;
+    uint8_t j8 = 0;
+    for (int i = 0; i < (2 << 8); ++i, ++i8) {
+        for (int j = 0; j < (2 << 8); ++j, ++j8) {
+            data[0] = i8;
+            data[1] = j8;
+            buffer.setPosition(0);
+            EXPECT_EQ(buffer.readUint16(), readUint16(data, sizeof(data)));
+        }
+    }
+}
+
+TEST(asioutil, readUint16OutOfRange) {
+    uint8_t data = 0;
+    EXPECT_THROW(readUint16(&data, sizeof(data)), isc::OutOfRange);
+}
+
+TEST(asioutil, writeUint16) {
+
+    // Reference buffer
+    OutputBuffer buffer(2);
+    uint8_t test[2];
+
+    // Avoid possible compiler warnings by only setting uint16_t variables to
+    // uint16_t values.
+    uint16_t i16 = 0;
+    for (uint32_t i = 0; i < (2 << 16); ++i, ++i16) {
+
+        // Write the reference data
+        buffer.clear();
+        buffer.writeUint16(i16);
+
+        // ... and the test data
+        writeUint16(i16, test, sizeof(test));
+
+        // ... and compare
+        const uint8_t* ref = static_cast<const uint8_t*>(buffer.getData());
+        EXPECT_EQ(ref[0], test[0]);
+        EXPECT_EQ(ref[1], test[1]);
+    }
+}
+
+TEST(asioutil, writeUint16OutOfRange) {
+    uint16_t i16 = 42;
+    uint8_t data;
+    EXPECT_THROW(writeUint16(i16, &data, sizeof(data)), isc::OutOfRange);
+}
+
+// test data shared amount readUint32 and writeUint32 tests
+const static uint32_t test32[] = {
+    0,
+    1,
+    2000,
+    0x80000000,
+    0xffffffff
+};
+
+TEST(asioutil, readUint32) {
+    uint8_t data[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+
+    // make sure that we can read data, regardless of
+    // the memory alignment. That' why we need to repeat
+    // it 4 times.
+    for (int offset=0; offset < 4; offset++) {
+        for (int i=0; i < sizeof(test32)/sizeof(uint32_t); i++) {
+            uint32_t tmp = htonl(test32[i]);
+            memcpy(&data[offset], &tmp, sizeof(uint32_t));
+
+            EXPECT_EQ(test32[i], readUint32(&data[offset], sizeof(uint32_t)));
+        }
+    }
+}
+
+TEST(asioutil, readUint32OutOfRange) {
+    uint8_t data[3] = {0, 0, 0};
+    EXPECT_THROW(readUint32(data, sizeof(data)), isc::OutOfRange);
+}
+
+TEST(asioutil, writeUint32) {
+    uint8_t data[8];
+
+    // make sure that we can write data, regardless of
+    // the memory alignment. That's why we need to repeat
+    // it 4 times.
+    for (int offset=0; offset < 4; offset++) {
+        for (int i=0; i < sizeof(test32)/sizeof(uint32_t); i++) {
+            uint8_t* ptr = writeUint32(test32[i], &data[offset],
+                                       sizeof(uint32_t));
+
+            EXPECT_EQ(&data[offset]+sizeof(uint32_t), ptr);
+
+            uint32_t tmp = htonl(test32[i]);
+
+            EXPECT_EQ(0, memcmp(&tmp, &data[offset], sizeof(uint32_t)));
+        }
+    }
+}
+
+TEST(asioutil, writeUint32OutOfRange) {
+    uint32_t i32 = 28;
+    uint8_t data[3];
+    EXPECT_THROW(writeUint32(i32, data, sizeof(data)), isc::OutOfRange);
+}
+
+// Tests whether uint64 can be read from a buffer properly.
+TEST(asioutil, readUint64) {
+
+    uint8_t buf[8];
+    for (int offset = 0; offset < sizeof(buf); offset++) {
+        buf[offset] = offset+1;
+    }
+
+    // Let's do some simple sanity checks first.
+    EXPECT_THROW(readUint64(NULL, 0), isc::OutOfRange);
+    EXPECT_THROW(readUint64(buf, 7), isc::OutOfRange);
+
+    // Now check if a real value could be read.
+    const uint64_t exp_val = 0x0102030405060708ul;
+    uint64_t val;
+
+    EXPECT_NO_THROW(val = readUint64(buf, 8));
+    EXPECT_EQ(val, exp_val);
+
+    // Now check if there are no buffer overflows.
+    memset(buf, 0xff, 8);
+
+    EXPECT_NO_THROW(val = readUint64(buf, 8));
+    EXPECT_EQ(0xfffffffffffffffful, val);
+}