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reseau statique a...
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/*
* Copyright (C) 2016 Takuo Yonezawa <Yonezawa-T2@mail.dnp.co.jp>
*
* 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/gnrc/udp.h"
#include "net/ipv6/hdr.h"
#include "unittests-constants.h"
#include "tests-gnrc_udp.h"
static gnrc_pktsnip_t zero_snip = {
.users = 0,
.next = NULL,
.data = NULL,
.size = 0,
.type = GNRC_NETTYPE_UNDEF,
};
static void test_gnrc_udp__csum_null(void)
{
gnrc_pktsnip_t *hdr = NULL;
gnrc_pktsnip_t *pseudo_hdr = NULL;
TEST_ASSERT_EQUAL_INT(-EFAULT, gnrc_udp_calc_csum(hdr, pseudo_hdr));
}
static void test_gnrc_udp__csum_not_a_udp(void)
{
gnrc_pktsnip_t hdr = zero_snip;
gnrc_pktsnip_t pseudo_hdr = zero_snip;
TEST_ASSERT_EQUAL_INT(-EBADMSG, gnrc_udp_calc_csum(&hdr, &pseudo_hdr));
}
static void test_gnrc_udp__csum_not_a_ipv6(void)
{
gnrc_pktsnip_t payload = zero_snip;
uint8_t payload_data[] = { 0 };
gnrc_pktsnip_t hdr = zero_snip;
udp_hdr_t hdr_data = (udp_hdr_t) {
.src_port = byteorder_htons(0),
.dst_port = byteorder_htons(0),
.length = byteorder_htons(0),
.checksum = byteorder_htons(0),
};
gnrc_pktsnip_t pseudo_hdr = zero_snip;
ipv6_hdr_t pseudo_hdr_data = (ipv6_hdr_t) {
.v_tc_fl = byteorder_htonl(0),
.len = byteorder_htons((uint16_t) (sizeof(hdr_data) + sizeof(payload_data))),
.nh = GNRC_NETTYPE_UDP,
.hl = 0,
.src = IPV6_ADDR_UNSPECIFIED,
.dst = IPV6_ADDR_UNSPECIFIED,
};
pseudo_hdr.type = GNRC_NETTYPE_UNDEF; /* This should result in ENOENT */
pseudo_hdr.data = &pseudo_hdr_data;
pseudo_hdr.size = sizeof(pseudo_hdr_data);
pseudo_hdr.next = &hdr;
hdr.type = GNRC_NETTYPE_UDP;
hdr.data = &hdr_data;
hdr.size = sizeof(hdr_data);
hdr.next = &payload;
payload.data = payload_data;
payload.size = 0;
TEST_ASSERT_EQUAL_INT(-ENOENT, gnrc_udp_calc_csum(&hdr, &pseudo_hdr));
}
/**
* @brief computes UDP checksum for given UDP payload and checksum.
*
* @param[in] payload_data UDP payload
* @param[in] size The size of the payload
* @param[in] checksum Checksum field of the UDP packet.
* Will be overridden with the computed checksum.
*
* @return 0 on success
* @return non-zero on failure
*/
static uint16_t _compute_checksum(uint8_t *payload_data, size_t size, uint16_t *checksum) {
gnrc_pktsnip_t payload = zero_snip;
gnrc_pktsnip_t hdr = zero_snip;
udp_hdr_t hdr_data = (udp_hdr_t) {
.src_port = byteorder_htons(0),
.dst_port = byteorder_htons(0),
.length = byteorder_htons(0),
.checksum = byteorder_htons(*checksum),
};
gnrc_pktsnip_t pseudo_hdr = zero_snip;
ipv6_hdr_t pseudo_hdr_data = (ipv6_hdr_t) {
.v_tc_fl = byteorder_htonl(0),
.len = byteorder_htons((uint16_t) (sizeof(hdr_data) + size)),
.nh = GNRC_NETTYPE_UDP,
.hl = 0,
.src = IPV6_ADDR_UNSPECIFIED,
.dst = IPV6_ADDR_UNSPECIFIED,
};
pseudo_hdr.type = GNRC_NETTYPE_IPV6;
pseudo_hdr.data = &pseudo_hdr_data;
pseudo_hdr.size = sizeof(pseudo_hdr_data);
pseudo_hdr.next = &hdr;
hdr.type = GNRC_NETTYPE_UDP;
hdr.data = &hdr_data;
hdr.size = sizeof(hdr_data);
hdr.next = &payload;
payload.data = payload_data;
payload.size = size;
int status = gnrc_udp_calc_csum(&hdr, &pseudo_hdr);
*checksum = byteorder_ntohs(hdr_data.checksum);
return status;
}
static void test_gnrc_udp__csum_simple1(void)
{
uint8_t payload_data[] = {
0x00, 0x01, 0xFF, 0xE2,
};
uint16_t checksum = 0;
int status = _compute_checksum(payload_data, sizeof(payload_data), &checksum);
TEST_ASSERT_EQUAL_INT(0, status);
TEST_ASSERT_EQUAL_INT((~0x0001) & 0xFFFF, checksum);
}
static void test_gnrc_udp__csum_simple2(void)
{
uint8_t payload_data[] = {
0x00, 0x02, 0xFF, 0xE2,
};
uint16_t checksum = 0;
int status = _compute_checksum(payload_data, sizeof(payload_data), &checksum);
TEST_ASSERT_EQUAL_INT(0, status);
TEST_ASSERT_EQUAL_INT((~0x0002) & 0xFFFF, checksum);
}
static void test_gnrc_udp__csum_applying_twice_yields_ffff(void)
{
uint8_t payload_data[] = {
0x00, 0x02, 0xFF, 0xE2,
};
uint16_t checksum = 0;
int status1 = _compute_checksum(payload_data, sizeof(payload_data), &checksum);
int status2 = _compute_checksum(payload_data, sizeof(payload_data), &checksum);
TEST_ASSERT_EQUAL_INT(0, status1);
TEST_ASSERT_EQUAL_INT(0, status2);
TEST_ASSERT_EQUAL_INT(0xFFFF, checksum);
}
static void test_gnrc_udp__csum_ffff(void)
{
uint8_t payload_data[] = {
0x00, 0x00, 0xFF, 0xE2,
};
uint16_t checksum = 0;
int status = _compute_checksum(payload_data, sizeof(payload_data), &checksum);
TEST_ASSERT_EQUAL_INT(0, status);
TEST_ASSERT_EQUAL_INT(0xFFFF, checksum);
}
static void test_gnrc_udp__csum_zero(void)
{
uint8_t payload_data[] = {
0xFF, 0xFF, 0xFF, 0xE2,
};
uint16_t checksum = 0;
int status = _compute_checksum(payload_data, sizeof(payload_data), &checksum);
TEST_ASSERT_EQUAL_INT(0, status);
/* https://tools.ietf.org/html/rfc2460#section-8.1
* bullet 4
* "if that computation yields a result of zero, it must be changed
* to hex FFFF for placement in the UDP header."
*/
TEST_ASSERT_EQUAL_INT(0xFFFF, checksum);
}
static void test_gnrc_udp__csum_all(void)
{
uint8_t payload_data[] = {
0x00, 0x00, 0xFF, 0xE2,
};
for (uint32_t i = 0; i < 0x10000; i++) {
payload_data[0] = i >> 8;
payload_data[1] = i & 0xFF;
uint16_t checksum = 0;
int status = _compute_checksum(payload_data, sizeof(payload_data), &checksum);
TEST_ASSERT_EQUAL_INT(0, status);
if (i == 0xFFFF) {
/* https://tools.ietf.org/html/rfc2460#section-8.1
* bullet 4
* "if that computation yields a result of zero, it must be changed
* to hex FFFF for placement in the UDP header."
*/
TEST_ASSERT_EQUAL_INT(0xFFFF, checksum);
} else {
TEST_ASSERT_EQUAL_INT(0xFFFF - i, checksum);
}
}
}
Test *tests_gnrc_udp_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_gnrc_udp__csum_null),
new_TestFixture(test_gnrc_udp__csum_not_a_udp),
new_TestFixture(test_gnrc_udp__csum_not_a_ipv6),
new_TestFixture(test_gnrc_udp__csum_simple1),
new_TestFixture(test_gnrc_udp__csum_simple2),
new_TestFixture(test_gnrc_udp__csum_applying_twice_yields_ffff),
new_TestFixture(test_gnrc_udp__csum_ffff),
new_TestFixture(test_gnrc_udp__csum_zero),
new_TestFixture(test_gnrc_udp__csum_all),
};
EMB_UNIT_TESTCALLER(gnrc_udp_tests, NULL, NULL, fixtures);
return (Test *)&gnrc_udp_tests;
}
void tests_gnrc_udp(void)
{
TESTS_RUN(tests_gnrc_udp_tests());
}
/** @} */
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