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tests: use PRNG in checksum test

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(And don't try to go beyond fletcher checksum offset special value.)

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2022-02-26 15:13:28 +01:00
parent 89087f23b5
commit 9b6ef21e51
2 changed files with 9 additions and 10 deletions
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2
tests/lib/subdir.am
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@ -148,7 +148,7 @@ check_PROGRAMS += tests/lib/test_checksum
tests_lib_test_checksum_CFLAGS = $(TESTS_CFLAGS)
tests_lib_test_checksum_CPPFLAGS = $(TESTS_CPPFLAGS)
tests_lib_test_checksum_LDADD = $(ALL_TESTS_LDADD)
tests_lib_test_checksum_SOURCES = tests/lib/test_checksum.c
tests_lib_test_checksum_SOURCES = tests/lib/test_checksum.c tests/helpers/c/prng.c
check_PROGRAMS += tests/lib/test_graph

17
tests/lib/test_checksum.c
View File

@ -24,6 +24,7 @@
#include "checksum.h"
#include "network.h"
#include "prng.h"
struct thread_master *master;
@ -468,24 +469,19 @@ int main(int argc, char **argv)
uint8_t buffer[BUFSIZE];
int exercise = 0;
#define EXERCISESTEP 257
srandom(time(NULL));
struct prng *prng = prng_new(0);
while (1) {
uint16_t ospfd, isisd, lib, in_csum, in_csum_res, in_csum_rfc;
int i, j;
int i;
exercise += EXERCISESTEP;
exercise %= MAXDATALEN;
printf("\rexercising length %d\033[K", exercise);
for (i = 0; i < exercise; i += sizeof(long int)) {
long int rand = frr_weak_random();
for (j = sizeof(long int); j > 0; j--)
buffer[i + (sizeof(long int) - j)] =
(rand >> (j * 8)) & 0xff;
}
for (i = 0; i < exercise; i++)
buffer[i] = prng_rand(prng);
in_csum = in_cksum(buffer, exercise);
in_csum_res = in_cksum_optimized(buffer, exercise);
@ -537,6 +533,9 @@ int main(int argc, char **argv)
iov[2].iov_len, in_csum_iov, in_csum);
}
if (exercise >= FLETCHER_CHECKSUM_VALIDATE)
continue;
ospfd = ospfd_checksum(buffer, exercise + sizeof(uint16_t),
exercise);
if (verify(buffer, exercise + sizeof(uint16_t)))