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unittests: add test for ng_inet_csum() for double-wraparound

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This commit is contained in:
Martine Lenders 2015-07-01 18:19:03 +02:00
parent 4a2af80e22
commit 6ce23a42f5
1 changed files with 16 additions and 0 deletions
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16
tests/unittests/tests-inet_csum/tests-inet_csum.c
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@ -75,6 +75,21 @@ static void test_inet_csum__set_initial_sum(void)
TEST_ASSERT_EQUAL_INT(0xffff, ng_inet_csum(0x38 + 0x3a, data, sizeof(data)));
}
static void test_inet_csum__wraps_more_than_once(void)
{
/* catches the corner-case that the internal wrap-around does not suffice
* to be done once */
uint8_t data[] = {
0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xc8, 0x86, 0xcd, 0xff, 0xfe, 0x0f, 0xce, 0x49,
0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x18, 0xaa, 0x2d, 0xff, 0xfe, 0x44, 0x43, 0xac
};
/* values were taken from a case I encountered in the wild */
TEST_ASSERT_EQUAL_INT(0x0002, ng_inet_csum(0x1785, data, sizeof(data)));
}
static void test_inet_csum__calculate_csum(void)
{
/* source: http://en.wikipedia.org/w/index.php?title=IPv4_header_checksum&oldid=645516564
@ -112,6 +127,7 @@ Test *tests_inet_csum_tests(void)
new_TestFixture(test_inet_csum__rfc_example),
new_TestFixture(test_inet_csum__ipv6_pseudo_hdr),
new_TestFixture(test_inet_csum__set_initial_sum),
new_TestFixture(test_inet_csum__wraps_more_than_once),
new_TestFixture(test_inet_csum__calculate_csum),
new_TestFixture(test_inet_csum__odd_len),
};