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reseau statique a...
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/*
* Copyright (C) 2014 Martine Lenders <mlenders@inf.fu-berlin.de>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @{
*
* @file
*/
#include <errno.h>
#include <stdlib.h>
#include "embUnit.h"
#include "net/inet_csum.h"
#include "unittests-constants.h"
#include "tests-inet_csum.h"
static void test_inet_csum__rfc_example(void)
{
/* source: https://tools.ietf.org/html/rfc1071#section-3 */
uint8_t data[] = {
0x00, 0x01, 0xf2, 0x03, 0xf4, 0xf5, 0xf6, 0xf7
};
TEST_ASSERT_EQUAL_INT(0xddf2, inet_csum(0, data, sizeof(data)));
}
static void test_inet_csum__ipv6_pseudo_hdr(void)
{
/* source: https://www.cloudshark.org/captures/ea72fbab241b (No. 56) */
uint8_t data[] = {
0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* IPv6 source */
0x5a, 0x6d, 0x8f, 0xff, 0xfe, 0x56, 0x30, 0x09,
0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* IPv6 destination */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00, 0x3a, /* payload length + next header */
0x86, 0x00, 0xab, 0x32, 0x40, 0x58, 0x07, 0x08, /* ICMPv6 payload */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x00, 0x1e,
0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00,
0x20, 0x02, 0x18, 0x3d, 0xdb, 0xa4, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x01, 0x58, 0x6d, 0x8f, 0x56, 0x30, 0x09
};
/* result unnormalized: take 1's-complement of 0 */
TEST_ASSERT_EQUAL_INT(0xffff, inet_csum(0x0, data, sizeof(data)));
}
static void test_inet_csum__set_initial_sum(void)
{
/* source: https://www.cloudshark.org/captures/ea72fbab241b (No. 56) */
uint8_t data[] = {
0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* IPv6 source */
0x5a, 0x6d, 0x8f, 0xff, 0xfe, 0x56, 0x30, 0x09,
0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* IPv6 destination */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x86, 0x00, 0xab, 0x32, 0x40, 0x58, 0x07, 0x08, /* ICMPv6 payload */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x00, 0x1e,
0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00,
0x20, 0x02, 0x18, 0x3d, 0xdb, 0xa4, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x01, 0x58, 0x6d, 0x8f, 0x56, 0x30, 0x09
};
/* result unnormalized: take 1's-complement of 0
* set next header and payload length as initial value */
TEST_ASSERT_EQUAL_INT(0xffff, 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, 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
* but left checksum 0 */
uint8_t data[] = {
0x45, 0x00, 0x00, 0x73, 0x00, 0x00, 0x40, 0x00,
0x40, 0x11, 0x00, 0x00, 0xc0, 0xa8, 0x00, 0x01,
0xc0, 0xa8, 0x00, 0xc7,
};
/* result unnormalized: take 1's-complement of 0xb861 */
TEST_ASSERT_EQUAL_INT(0x479e, inet_csum(0, data, sizeof(data)));
}
static void test_inet_csum__odd_len(void)
{
/* source: https://www.cloudshark.org/captures/ea72fbab241b (No. 1) */
uint8_t data[] = {
0xc0, 0xa8, 0x01, 0x91, 0x4b, 0x4b, 0x4b, 0x4b, /* IPv4 source + dest*/
0xf6, 0xfb, 0x00, 0x35, 0x00, 0x27, 0xd1, 0xa2, /* UDP header */
0xa5, 0x6f, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, /* DNS payload */
0x00, 0x00, 0x00, 0x00, 0x09, 0x74, 0x65, 0x73,
0x74, 0x2d, 0x69, 0x70, 0x76, 0x36, 0x03, 0x63,
0x6f, 0x6d, 0x00, 0x00, 0x01, 0x00, 0x01,
};
/* result unnormalized: take 1's-complement of 0
* set next header and payload length as initial value */
TEST_ASSERT_EQUAL_INT(0xffff, inet_csum(17 + 39, data, sizeof(data)));
}
static void test_inet_csum__two_app_snips(void)
{
/* CoAP header with Uri-Path and Content-Format options; odd length */
uint8_t data_hdr[] = {
0x50, 0x02, 0x00, 0x01, 0xb4, 0x74, 0x65, 0x73,
0x74, 0x10, 0xff,
};
/* Single character payload, 'a' */
uint8_t data_pyld[] = {
0x61,
};
uint16_t hdr_sum, pyld_sum, hdr_expected = 0xdcfc;
/* result unnormalized:
* initial sum (0) is arbitrary, and incoming length (0) must be even;
* we expect last byte is shifted left for this odd-sized header */
hdr_sum = inet_csum_slice(0, data_hdr, sizeof(data_hdr), 0);
TEST_ASSERT_EQUAL_INT(hdr_expected, hdr_sum);
/* Since header was odd length, we expect the single byte in the payload
* snip is not shifted left */
pyld_sum = inet_csum_slice(hdr_expected, data_pyld, sizeof(data_pyld), sizeof(data_hdr));
TEST_ASSERT_EQUAL_INT(hdr_expected + 0x61, pyld_sum);
}
static void test_inet_csum__empty_app_buffer(void)
{
/* CoAP header with Uri-Path and Content-Format options; odd length */
uint8_t data_hdr[] = {
0x50, 0x02, 0x00, 0x01, 0xb4, 0x74, 0x65, 0x73,
0x74, 0x10, 0xff,
};
uint16_t hdr_sum, pyld_sum, hdr_expected = 0xdcfc;
/* result unnormalized:
* explictly using an odd-sized header for the first slice, to setup corner case */
hdr_sum = inet_csum_slice(0, data_hdr, sizeof(data_hdr), 0);
TEST_ASSERT_EQUAL_INT(hdr_expected, hdr_sum);
/* expect an empty buffer simply to reflect the incoming checksum */
pyld_sum = inet_csum_slice(hdr_expected, NULL, 0, sizeof(data_hdr));
TEST_ASSERT_EQUAL_INT(hdr_expected, pyld_sum);
}
Test *tests_inet_csum_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
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),
new_TestFixture(test_inet_csum__two_app_snips),
new_TestFixture(test_inet_csum__empty_app_buffer),
};
EMB_UNIT_TESTCALLER(inet_csum_tests, NULL, NULL, fixtures);
return (Test *)&inet_csum_tests;
}
void tests_inet_csum(void)
{
TESTS_RUN(tests_inet_csum_tests());
}
/** @} */
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