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// SPDX-License-Identifier: BSD-3-Clause
/**
* @file test-murmur-hash.c
*
* @brief mptcpd MurmurHash3 test.
*
* Copyright (c) 2022, Intel Corporation
*/
#include <stdint.h>
#include <stddef.h>
#include <ell/ell.h>
#include <mptcpd/private/murmur_hash.h>
#undef NDEBUG
#include <assert.h>
static void test_hash_32(void const *test_data)
{
(void) test_data;
/*
This test is not meant to test the MurmurHash3 algorithm
itself. It is only meant to perform a black box test of
mptcpd_murmur_hash3() since an extensive test suite for the
MurmurHash3 algorithm already exists upstream.
See: https://github.com/aappleby/smhasher
*/
uint32_t const k1 = 0x010200C0;
uint32_t const k2 = k1 + 1;
uint8_t const k3[16] = {
[0] = 0x20,
[1] = 0x01,
[2] = 0x0D,
[3] = 0xB8,
[14] = 0x01,
[15] = 0x02
};
uint32_t const seed = 0xc0ffee;
unsigned int const hash1 =
mptcpd_murmur_hash3(&k1, sizeof(k1), seed);
assert(hash1 != 0);
unsigned int const hash2 =
mptcpd_murmur_hash3(&k2, sizeof(k2), seed);
assert(hash2 != 0);
assert(hash2 != hash1);
unsigned int const hash3 =
mptcpd_murmur_hash3(k3, sizeof(k3), seed);
assert(hash3 != 0);
assert(hash3 != hash2);
assert(hash3 != hash1);
uint8_t a[31] = { 1, 2, 3 };
unsigned int const hash4 =
mptcpd_murmur_hash3(a, sizeof(a), seed);
l_info("hash1: 0x%x", hash1);
l_info("hash2: 0x%x", hash2);
l_info("hash3: 0x%x", hash3);
l_info("hash4: 0x%x", hash4);
}
int main(int argc, char *argv[])
{
l_log_set_stderr();
l_test_init(&argc, &argv);
l_test_add("test MurmurHash3 (x86_32)", test_hash_32, NULL);
return l_test_run();
}
/*
Local Variables:
c-file-style: "linux"
End:
*/
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