[LTP] [PATCH] network/lib6/getaddrinfo01: rewrite with the new API + use static hostnames

[Alexey Kodanev <aleksei.kodanev@bell-sw.com>]

On 18.05.2021 09:02, Petr Vorel wrote:
> Hi Alexey,
> 
> Reviewed-by: Petr Vorel <pvorel@suse.cz>
> 

Hi Petr,

Thank you for review!

> Moving everything to /etc/hosts based setup is a great idea
> as we get rid of network setup related failures.
> 
> Do we lost any getaddrinfo() test coverage for bypassing DNS?

We may lose some DNS lookups queries because the files almost always
will be checked first by nss, and I think this is covered by another
test, dns-stress{01|02} (focus more on the server than the client).

> Just a few unimportant nits below (feel free to ignore them).
> Again, I'd be for merging this before release.
> 

OK, I'll post v2 today.

>> The test is now independent of various machine settings
>> regarding the test host name as it adds predefined names
>> and aliases to /etc/hosts file and restores it to its
>> original state after completing the test.
> 
>> This should fix the following failures:
>> * when gethostname() returns an alias name that doesn't
>>   match canonical name;
>> * No AAAA record for the returned name from gethostname().
> 
>> Addresses and names added to /etc/hosts are more or less
>> unique, so that there are no conflicts with the existing
>> configuration.
> We might want to put this into docparse documentation, e.g:
> 
> /*\
>  * [Description]
>  *
>  * Basic getaddrinfo() tests.
>  *
>  * Test use LTP specific addresses and names added to /etc/hosts to avoid
>  * problems with DNS and hostname setup or conflicts with existing
>  * configuration.
>  */
> 
>> Also most of the duplicate code is now gone.
> 
>> Signed-off-by: Alexey Kodanev <aleksei.kodanev@bell-sw.com>
>> ---
>>  testcases/network/lib6/getaddrinfo_01.c | 1140 +++++------------------
>>  1 file changed, 235 insertions(+), 905 deletions(-)
> 
>> diff --git a/testcases/network/lib6/getaddrinfo_01.c b/testcases/network/lib6/getaddrinfo_01.c
>> index db252a998..23a279ed1 100644
> 
> ...
>> +static void gaiv(void)
>> +{
>> +	check_addrinfo(1, "basic lookup", hostname, 0, NULL, 0, 0, 0, NULL);
>> +	check_addrinfo_name("canonical name");
> 
> ...
>> +	check_addrinfo(1, "host+service", hostname, 7, "echo", 0, 0, 0, NULL);
>> +
>> +	check_addrinfo(1, "host+service, AI_PASSIVE", hostname, 9462, "9462",
>> +		       AI_PASSIVE, SOCK_STREAM, 0, test_passive);
>> +
>> +	check_addrinfo(0, "host+service, AI_NUMERICHOST", hostname, 7, "echo",
>> +		       AI_NUMERICHOST, SOCK_STREAM, 0, NULL);
>> +	if (TST_RET != EAI_NONAME)
>> +		tst_brk(TFAIL, "AI_NUMERICHOST: ret %ld exp %d (EAI_NONAME)",
>> +			TST_RET, EAI_NONAME);
>> +	tst_res(TPASS, "AI_NUMERICHOST: exp %ld (EAI_NONAME)", TST_RET);
>> +
>> +	check_addrinfo(1, "0+service, AI_PASSIVE", NULL, 9462, "9462",
>> +		       AI_PASSIVE, SOCK_STREAM, 0, test_passive_no_host);
>> +
>> +	check_addrinfo(0, "0+service", NULL, 9462, "9462",
>> +		       0, SOCK_STREAM, 0, test_loopback);
>> +	if (TST_RET == EAI_BADFLAGS) {
>> +		tst_res(TPASS, "0+service ('', '9462') returns %ld '%s'",
>> +			TST_RET, gai_strerror(TST_RET));
>> +	} else if (TST_RET) {
>> +		tst_brk(TFAIL, "0+service ('', '9462') returns %ld '%s'",
>> +			TST_RET, gai_strerror(TST_RET));
>>  	}
> nit: Maybe having check_addrinfo_badflags() which would do the verification
> would safe few lines of code duplicity.
> 
> ...
>> -	/* test 16, IPv6 host+service w/ AI_NUMERICHOST */
>> -	memset(&hints, 0, sizeof(hints));
>> -	strcpy(service, "echo");
>> -	servnum = 7;
>> -	hints.ai_family = AF_INET6;
>> -	hints.ai_flags = AI_NUMERICHOST;
>> -	TEST(getaddrinfo(hostname, service, &hints, &aires));
>> -	if (TEST_RETURN != EAI_NONAME) {
>> -		tst_resm(TFAIL, "getaddrinfo IPv6 AI_NUMERICHOST w/ hostname: "
>> -			 "returns %ld expected %d (EAI_NONAME)",
>> -			 TEST_RETURN, EAI_NONAME);
>> -		if (!TEST_RETURN)
>> -			freeaddrinfo(aires);
>> -		return;
>> +	check_addrinfo(0, "SOCK_STREAM/IPPROTO_UDP", NULL, 0, NULL, 0,
>> +		       SOCK_STREAM, IPPROTO_UDP, NULL);
>> +	if (!TST_RET)
>> +		tst_brk(TFAIL, "SOCK_STREAM/IPPROTO_UDP: unexpected pass");
>> +	tst_res(TPASS, "SOCK_STREAM/IPPROTO_UDP: failed as expected");
>> +
>> +	check_addrinfo(0, "socktype 0, 513", NULL, 513, "513", 0, 0, 0, NULL);
> And here also check_addrinfo_badflags() (if implemented)
> and nit: "socktype 0,513" (remove space)
> 
>> +	if (TST_RET == EAI_BADFLAGS) {
>> +		tst_res(TPASS, "socktype 0,513 returns %ld '%s'",
>> +			TST_RET, gai_strerror(TST_RET));
>> +	} else if (TST_RET) {
>> +		tst_brk(TFAIL, "socktype 0,513 returns %ld '%s'",
>> +			TST_RET, gai_strerror(TST_RET));
>>  	}
> 
> Kind regards,
> Petr
>