/* SPDX-License-Identifier: GPL-2.0-only */ #include <tests/test.h> #include <string.h> #include <stdlib.h> #include <types.h> #include <ip_checksum.h> static const uint8_t test_data_simple[] = { 0x64, 0x3b, 0x33, 0x17, 0x34, 0x74, 0x62, 0x30, 0x75, 0x73, 0xf3, 0x11, 0x30, 0x2c, 0x34, 0x35, 0x6d, 0x39, 0x69, 0x32, 0x23, 0x24, 0x76, 0x71, 0x77, 0x30, 0x39, 0x75, 0x76, 0x35, 0x71, 0x32, 0x40, 0x46, 0x34, 0x34, 0xBB, 0x03, 0x66, 0x52}; static const size_t test_data_simple_sz = ARRAY_SIZE(test_data_simple); static const unsigned long test_data_simple_checksum = 0x4267; static uint8_t test_data_zeros[1024]; static const size_t test_data_zeros_sz = ARRAY_SIZE(test_data_zeros); static const unsigned long test_data_zeros_checksum = 0xFFFF; static int setup_test_group(void **state) { memset(test_data_zeros, 0, test_data_zeros_sz); return 0; } static void test_compute_ip_checksum_zero_length(void **state) { unsigned long res = compute_ip_checksum(test_data_simple, 0); /* Expect checksum to be in initial state as there are were no data provided. */ assert_int_equal(0xFFFF, res); } static void test_compute_ip_checksum_zero_buffer(void **state) { unsigned long res = compute_ip_checksum(test_data_zeros, test_data_zeros_sz); assert_int_equal(test_data_zeros_checksum, res); } static void test_compute_ip_checksum_simple_data(void **state) { unsigned long res; unsigned long check_res; const size_t helper_buffer_size = sizeof(uint8_t) * (test_data_simple_sz + 2); char *helper_buffer = malloc(helper_buffer_size); /* Self test */ assert_non_null(helper_buffer); /* Expect function to generate the same checksum as stored in */ res = compute_ip_checksum(test_data_simple, test_data_simple_sz); assert_int_equal(test_data_simple_checksum, res); /* Copy test data and checksum to new buffer. Expect computed checksum to be zero, as it proves the data and the checksum are correct. */ memcpy(helper_buffer, test_data_simple, test_data_simple_sz); helper_buffer[helper_buffer_size - 2] = res & 0xFF; helper_buffer[helper_buffer_size - 1] = (res >> 8) & 0xFF; check_res = compute_ip_checksum(helper_buffer, helper_buffer_size); assert_int_equal(0, check_res); free(helper_buffer); } static void test_add_ip_checksums_empty_values(void **state) { unsigned long res; res = add_ip_checksums(0, 0xFFFF, 0xFFFF); assert_int_equal(0xFFFF, res); res = add_ip_checksums(1, 0xFFFF, 0xFFFF); assert_int_equal(0xFFFF, res); } static void test_add_ip_checksums(void **state) { unsigned long res_1 = compute_ip_checksum(test_data_simple, test_data_simple_sz / 2); unsigned long res_2 = compute_ip_checksum(test_data_simple + test_data_simple_sz / 2, test_data_simple_sz / 2); unsigned long res_sum = add_ip_checksums(test_data_simple_sz / 2, res_1, res_2); assert_int_equal(test_data_simple_checksum, res_sum); } int main(void) { const struct CMUnitTest tests[] = { cmocka_unit_test(test_compute_ip_checksum_zero_length), cmocka_unit_test(test_compute_ip_checksum_zero_buffer), cmocka_unit_test(test_compute_ip_checksum_simple_data), cmocka_unit_test(test_add_ip_checksums_empty_values), cmocka_unit_test(test_add_ip_checksums), }; return cb_run_group_tests(tests, setup_test_group, NULL); }