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/* vim:ts=8:sts=8:sw=4:noai:noexpandtab
*
* unit tests for PGM checksum routines
*
* Copyright (c) 2009-2010 Miru Limited.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <signal.h>
#include <stdbool.h>
#include <stdlib.h>
#include <glib.h>
#include <check.h>
/* mock state */
/* mock functions for external references */
size_t
pgm_transport_pkt_offset2 (
const bool can_fragment,
const bool use_pgmcc
)
{
return 0;
}
#define CHECKSUM_DEBUG
#include "checksum.c"
/* target:
* uint16_t
* pgm_inet_checksum (
* const void* src,
* uint16_t len,
* uint16_t csum
* )
*/
START_TEST (test_inet_pass_001)
{
const char source[] = "i am not a string";
const guint16 answer = 0x1fda; /* network order */
guint16 csum = pgm_inet_checksum (source, sizeof(source), 0);
/* function calculates answer in host order */
csum = g_htons (csum);
g_message ("IP checksum of \"%s\" (%d) is %u (%u)",
source, sizeof(source), csum, answer);
fail_unless (answer == csum, "checksum mismatch");
}
END_TEST
START_TEST (test_inet_pass_002)
{
char* source = alloca (65535);
for (unsigned i = 0, j = 0; i < 65535; i++) {
j = j * 1103515245 + 12345;
source[i] = j;
}
const guint16 answer = 0x3fc0; /* network order */
guint16 csum = pgm_inet_checksum (source, 65535, 0);
/* function calculates answer in host order */
csum = g_htons (csum);
g_message ("IP checksum of 64KB is %u (%u)",
csum, answer);
fail_unless (answer == csum, "checksum mismatch");
}
END_TEST
START_TEST (test_inet_fail_001)
{
pgm_inet_checksum (NULL, 0, 0);
fail ("reached");
}
END_TEST
/* target:
* guint16
* pgm_csum_fold (
* guint32 csum
* )
*/
START_TEST (test_fold_pass_001)
{
const guint32 csum = 0xdd250300; /* network order */
const guint16 answer = 0x1fda;
guint16 folded_csum = pgm_csum_fold (g_ntohl (csum));
folded_csum = g_htons (folded_csum);
g_message ("32-bit checksum %u folds into %u (%u)", csum, folded_csum, answer);
fail_unless (answer == folded_csum, "folded checksum mismatch");
}
END_TEST
/* target:
* guint32
* pgm_csum_partial (
* const void* src,
* guint len,
* guint32 sum
* )
*/
START_TEST (test_partial_pass_001)
{
const char source[] = "i am not a string";
#if __BYTE_ORDER == __BIG_ENDIAN
const guint32 answer = 0x0000e025; /* network order */
#elif __BYTE_ORDER == __LITTLE_ENDIAN
const guint32 answer = 0xe0250000; /* network order */
#else
# error "__BYTE_ORDER not supported."
#endif
guint32 csum = pgm_csum_partial (source, sizeof(source), 0);
csum = g_htonl (csum);
g_message ("Partial checksum of \"%s\" is %u (%u)", source, csum, answer);
fail_unless (answer == csum, "checksum mismatch");
}
END_TEST
START_TEST (test_partial_fail_001)
{
pgm_csum_partial (NULL, 0, 0);
fail ("reached");
}
END_TEST
/* target:
* guint32
* pgm_csum_partial_copy (
* const void* src,
* void* dst,
* guint len,
* guint32 sum
* )
*/
START_TEST (test_partial_copy_pass_001)
{
const char source[] = "i am not a string";
#if __BYTE_ORDER == __BIG_ENDIAN
const guint32 answer = 0x0000e025; /* network order */
#elif __BYTE_ORDER == __LITTLE_ENDIAN
const guint32 answer = 0xe0250000; /* network order */
#else
# error "__BYTE_ORDER not supported."
#endif
char dest[1024];
guint32 csum_source = pgm_csum_partial_copy (source, dest, sizeof(source), 0);
csum_source = g_htonl (csum_source);
guint32 csum_dest = pgm_csum_partial (dest, sizeof(source), 0);
csum_dest = g_htonl (csum_dest);
g_message ("Partial copy checksum of \"%s\" is %u, partial checksum is %u (%u)",
source, csum_source, csum_dest, answer);
fail_unless (answer == csum_source, "checksum mismatch in partial-copy");
fail_unless (answer == csum_dest, "checksum mismatch in partial");
}
END_TEST
START_TEST (test_partial_copy_fail_001)
{
pgm_csum_partial_copy (NULL, NULL, 0, 0);
fail ("reached");
}
END_TEST
/* target:
* guint32
* pgm_csum_block_add (
* guint32 csum,
* guint32 csum2,
* guint offset
* )
*/
START_TEST (test_block_add_pass_001)
{
const char source[] = "i am not a string";
const guint16 answer = 0x1fda; /* network order */
guint32 csum_a = pgm_csum_partial (source, sizeof(source) / 2, 0);
guint32 csum_b = pgm_csum_partial (source + (sizeof(source) / 2), sizeof(source) - (sizeof(source) / 2), 0);
guint32 csum = pgm_csum_block_add (csum_a, csum_b, sizeof(source) / 2);
guint16 fold = pgm_csum_fold (csum);
/* convert to display in network order */
csum_a = g_htonl (csum_a);
csum_b = g_htonl (csum_b);
csum = g_htonl (csum);
fold = g_htons (fold);
g_message ("Checksum A:%u + B:%u = %u -> %u (%u)",
csum_a, csum_b, csum, fold, answer);
fail_unless (answer == fold, "checksum mismatch");
}
END_TEST
static
Suite*
make_test_suite (void)
{
Suite* s;
s = suite_create (__FILE__);
TCase* tc_inet = tcase_create ("inet");
suite_add_tcase (s, tc_inet);
tcase_add_test (tc_inet, test_inet_pass_001);
tcase_add_test (tc_inet, test_inet_pass_002);
tcase_add_test_raise_signal (tc_inet, test_inet_fail_001, SIGABRT);
TCase* tc_fold = tcase_create ("fold");
suite_add_tcase (s, tc_fold);
tcase_add_test (tc_fold, test_fold_pass_001);
TCase* tc_block_add = tcase_create ("block-add");
suite_add_tcase (s, tc_block_add);
tcase_add_test (tc_block_add, test_block_add_pass_001);
TCase* tc_partial = tcase_create ("partial");
suite_add_tcase (s, tc_partial);
tcase_add_test (tc_partial, test_partial_pass_001);
tcase_add_test_raise_signal (tc_partial, test_partial_fail_001, SIGABRT);
TCase* tc_partial_copy = tcase_create ("partial-copy");
suite_add_tcase (s, tc_partial_copy);
tcase_add_test (tc_partial_copy, test_partial_copy_pass_001);
tcase_add_test_raise_signal (tc_partial_copy, test_partial_copy_fail_001, SIGABRT);
return s;
}
static
Suite*
make_master_suite (void)
{
Suite* s = suite_create ("Master");
return s;
}
int
main (void)
{
SRunner* sr = srunner_create (make_master_suite ());
srunner_add_suite (sr, make_test_suite ());
srunner_run_all (sr, CK_ENV);
int number_failed = srunner_ntests_failed (sr);
srunner_free (sr);
return (number_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}
/* eof */
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