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resolv: Deal with non-deterministic address order in tst-resolv-basic

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This commit is contained in:
Florian Weimer 2017-07-06 14:03:39 +02:00
parent d5c3fafc43
commit 9f5a127131
2 changed files with 69 additions and 15 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2017-07-06 Florian Weimer <fw@deneb.enyo.de>
* resolv/tst-resolv-basic.c (test_bug_21295): New function.
(do_test): Call it.
2017-07-06 DJ Delorie <dj@delorie.com>
* config.make.in: Enable experimental malloc option.

79
resolv/tst-resolv-basic.c
View File

@ -22,6 +22,7 @@
#include <string.h>
#include <support/check.h>
#include <support/check_nss.h>
#include <support/format_nss.h>
#include <support/resolv_test.h>
#include <support/support.h>
@ -204,6 +205,68 @@ check_ai (const char *name, const char *service,
expected);
}
/* Test for bug 21295: getaddrinfo used to discard address information
instead of merging it. */
static void
test_bug_21295 (void)
{
/* The address order is unpredictable. There are two factors which
contribute to that: The stub resolver does not perform proper
response matching for A/AAAA queries (an A response could be
associated with an AAAA query and vice versa), and without
namespaces, system configuration could affect address
ordering. */
for (int do_tcp = 0; do_tcp < 2; ++do_tcp)
{
const struct addrinfo hints =
{
.ai_family = AF_INET6,
.ai_socktype = SOCK_STREAM,
.ai_flags = AI_V4MAPPED | AI_ALL,
};
const char *qname;
if (do_tcp)
qname = "t.www.example";
else
qname = "www.example";
struct addrinfo *ai = NULL;
int ret = getaddrinfo (qname, "80", &hints, &ai);
TEST_VERIFY_EXIT (ret == 0);
const char *expected_a;
const char *expected_b;
if (do_tcp)
{
expected_a = "flags: AI_V4MAPPED AI_ALL\n"
"address: STREAM/TCP 2001:db8::3 80\n"
"address: STREAM/TCP ::ffff:192.0.2.19 80\n";
expected_b = "flags: AI_V4MAPPED AI_ALL\n"
"address: STREAM/TCP ::ffff:192.0.2.19 80\n"
"address: STREAM/TCP 2001:db8::3 80\n";
}
else
{
expected_a = "flags: AI_V4MAPPED AI_ALL\n"
"address: STREAM/TCP 2001:db8::1 80\n"
"address: STREAM/TCP ::ffff:192.0.2.17 80\n";
expected_b = "flags: AI_V4MAPPED AI_ALL\n"
"address: STREAM/TCP ::ffff:192.0.2.17 80\n"
"address: STREAM/TCP 2001:db8::1 80\n";
}
char *actual = support_format_addrinfo (ai, ret);
if (!(strcmp (actual, expected_a) == 0
|| strcmp (actual, expected_b) == 0))
{
support_record_failure ();
printf ("error: %s: unexpected response (TCP: %d):\n%s\n",
__func__, do_tcp, actual);
}
free (actual);
freeaddrinfo (ai);
}
}
static int
do_test (void)
{
@ -398,21 +461,7 @@ do_test (void)
check_ai ("t.nxdomain.example", "80", AF_INET6,
"error: Name or service not known\n");
/* Test for bug 21295. */
check_ai_hints ("www.example", "80",
(struct addrinfo) { .ai_family = AF_INET6,
.ai_socktype = SOCK_STREAM,
.ai_flags = AI_V4MAPPED | AI_ALL, },
"flags: AI_V4MAPPED AI_ALL\n"
"address: STREAM/TCP 2001:db8::1 80\n"
"address: STREAM/TCP ::ffff:192.0.2.17 80\n");
check_ai_hints ("t.www.example", "80",
(struct addrinfo) { .ai_family = AF_INET6,
.ai_socktype = SOCK_STREAM,
.ai_flags = AI_V4MAPPED | AI_ALL, },
"flags: AI_V4MAPPED AI_ALL\n"
"address: STREAM/TCP 2001:db8::3 80\n"
"address: STREAM/TCP ::ffff:192.0.2.19 80\n");
test_bug_21295 ();
resolv_test_end (aux);