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glibc/glibc-rh168253-tst-res_use_inet6-mapping.patch
Florian Weimer 8597553f96 Rebase DNS stub resolver to the glibc 2.26 version 
- Support an arbitrary number of search domains (#168253)
- Detect and apply /etc/resolv.conf changes in libresolv (#1374239)
- CVE-2015-5180: DNS stub resolver crash with crafted record type (#1251403)
2017-10-11 14:41:27 +02:00

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commit 85cfe508568530eed2d9cfd34110c21721d1f99e
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Sep 6 13:43:01 2017 +0200
tst-res_use_inet6: Enhance test to cover IPv4-to-IPv6 address mapping
This requires more control over the response data, so it is now
determined by flags embedded in the query name.
(cherry picked from commit 5e9c4d17feb9910f489ad2915d0b6e00597a0f11)
diff --git a/resolv/tst-res_use_inet6.c b/resolv/tst-res_use_inet6.c
index 6f3db088929027b7..1522d5c5f5e4d860 100644
--- a/resolv/tst-res_use_inet6.c
+++ b/resolv/tst-res_use_inet6.c
@@ -19,18 +19,44 @@
#include <netdb.h>
#include <resolv.h>
#include <string.h>
+#include <support/check.h>
#include <support/check_nss.h>
#include <support/resolv_test.h>
#include <support/xthread.h>
+/* Produce a response based on QNAME: Certain characters in the first
+ label of QNAME trigger the inclusion of resource records:
+
+ 'a' A record (IPv4 address)
+ 'q' AAAA record (quad A record, IPv6 address)
+ 'm' record type must match QTYPE (no additional records)
+
+ QTYPE is ignored for record type selection if 'm' is not
+ specified. */
static void
response (const struct resolv_response_context *ctx,
struct resolv_response_builder *b,
const char *qname, uint16_t qclass, uint16_t qtype)
{
- bool include_both = strcmp (qname, "both.example") == 0;
- bool include_a = qtype == T_A || include_both;
- bool include_aaaa = qtype == T_AAAA || include_both;
+ bool include_a = false;
+ bool include_aaaa = false;
+ bool include_match = false;
+ for (const char *p = qname; *p != '.' && *p != '\0'; ++p)
+ {
+ if (*p == 'a')
+ include_a = true;
+ else if (*p == 'q')
+ include_aaaa = true;
+ else if (*p == 'm')
+ include_match = true;
+ }
+ if (include_match)
+ {
+ if (qtype == T_A)
+ include_aaaa = false;
+ else if (qtype == T_AAAA)
+ include_a = false;
+ }
resolv_response_init (b, (struct resolv_response_flags) {});
resolv_response_add_question (b, qname, qclass, qtype);
@@ -64,16 +90,21 @@ test_gai (void)
.ai_protocol = IPPROTO_TCP,
};
struct addrinfo *ai;
- int ret = getaddrinfo ("www1.example", "80", &hints, &ai);
- check_addrinfo ("getaddrinfo AF_UNSPEC www1.example", ai, ret,
+ int ret = getaddrinfo ("qam.example", "80", &hints, &ai);
+ check_addrinfo ("getaddrinfo AF_UNSPEC qam.example", ai, ret,
"address: STREAM/TCP 192.0.2.17 80\n"
"address: STREAM/TCP 2001:db8::1 80\n");
if (ret == 0)
freeaddrinfo (ai);
- ret = getaddrinfo ("both.example", "80", &hints, &ai);
+ ret = getaddrinfo ("am.example", "80", &hints, &ai);
+ check_addrinfo ("getaddrinfo AF_UNSPEC am.example", ai, ret,
+ "address: STREAM/TCP 192.0.2.17 80\n");
+ if (ret == 0)
+ freeaddrinfo (ai);
+ ret = getaddrinfo ("qa.example", "80", &hints, &ai);
/* Combined A/AAAA responses currently result in address
duplication. */
- check_addrinfo ("getaddrinfo AF_UNSPEC both.example", ai, ret,
+ check_addrinfo ("getaddrinfo AF_UNSPEC qa.example", ai, ret,
"address: STREAM/TCP 192.0.2.17 80\n"
"address: STREAM/TCP 192.0.2.17 80\n"
"address: STREAM/TCP 2001:db8::1 80\n"
@@ -89,13 +120,18 @@ test_gai (void)
.ai_protocol = IPPROTO_TCP,
};
struct addrinfo *ai;
- int ret = getaddrinfo ("www1.example", "80", &hints, &ai);
- check_addrinfo ("getaddrinfo AF_INET www1.example", ai, ret,
+ int ret = getaddrinfo ("qam.example", "80", &hints, &ai);
+ check_addrinfo ("getaddrinfo AF_INET qam.example", ai, ret,
+ "address: STREAM/TCP 192.0.2.17 80\n");
+ if (ret == 0)
+ freeaddrinfo (ai);
+ ret = getaddrinfo ("am.example", "80", &hints, &ai);
+ check_addrinfo ("getaddrinfo AF_INET am.example", ai, ret,
"address: STREAM/TCP 192.0.2.17 80\n");
if (ret == 0)
freeaddrinfo (ai);
- ret = getaddrinfo ("both.example", "80", &hints, &ai);
- check_addrinfo ("getaddrinfo AF_INET both.example", ai, ret,
+ ret = getaddrinfo ("qa.example", "80", &hints, &ai);
+ check_addrinfo ("getaddrinfo AF_INET qa.example", ai, ret,
"address: STREAM/TCP 192.0.2.17 80\n");
if (ret == 0)
freeaddrinfo (ai);
@@ -108,40 +144,131 @@ test_gai (void)
.ai_protocol = IPPROTO_TCP,
};
struct addrinfo *ai;
- int ret = getaddrinfo ("www1.example", "80", &hints, &ai);
+ int ret = getaddrinfo ("qa.example", "80", &hints, &ai);
check_addrinfo ("getaddrinfo (AF_INET6)", ai, ret,
"address: STREAM/TCP 2001:db8::1 80\n");
if (ret == 0)
freeaddrinfo (ai);
- ret = getaddrinfo ("both.example", "80", &hints, &ai);
- check_addrinfo ("getaddrinfo AF_INET6 both.example", ai, ret,
+ ret = getaddrinfo ("am.example", "80", &hints, &ai);
+ check_addrinfo ("getaddrinfo AF_INET6 am.example", ai, ret,
+ "error: No address associated with hostname\n");
+ if (ret == 0)
+ freeaddrinfo (ai);
+ ret = getaddrinfo ("qam.example", "80", &hints, &ai);
+ check_addrinfo ("getaddrinfo AF_INET6 qam.example", ai, ret,
"address: STREAM/TCP 2001:db8::1 80\n");
if (ret == 0)
freeaddrinfo (ai);
}
}
-/* Test that gethostbyname2 is not influenced by RES_USE_INET6. */
+/* Test that gethostbyname2 is mostly not influenced by
+ RES_USE_INET6. */
static void
-test_get2 (void)
+test_get2_any (void)
{
- check_hostent ("gethostbyname2 AF_INET www1.example",
- gethostbyname2 ("www1.example", AF_INET),
- "name: www1.example\n"
+ check_hostent ("gethostbyname2 AF_INET am.example",
+ gethostbyname2 ("am.example", AF_INET),
+ "name: am.example\n"
"address: 192.0.2.17\n");
- check_hostent ("gethostbyname2 AF_INET both.example",
- gethostbyname2 ("both.example", AF_INET),
- "name: both.example\n"
+ check_hostent ("gethostbyname2 AF_INET a.example",
+ gethostbyname2 ("a.example", AF_INET),
+ "name: a.example\n"
+ "address: 192.0.2.17\n");
+ check_hostent ("gethostbyname2 AF_INET qm.example",
+ gethostbyname2 ("qm.example", AF_INET),
+ "error: NO_ADDRESS\n");
+ check_hostent ("gethostbyname2 AF_INET q.example",
+ gethostbyname2 ("q.example", AF_INET),
+ "error: NO_RECOVERY\n");
+ check_hostent ("gethostbyname2 AF_INET qam.example",
+ gethostbyname2 ("qam.example", AF_INET),
+ "name: qam.example\n"
+ "address: 192.0.2.17\n");
+ check_hostent ("gethostbyname2 AF_INET qa.example",
+ gethostbyname2 ("qa.example", AF_INET),
+ "name: qa.example\n"
"address: 192.0.2.17\n");
- check_hostent ("gethostbyname2 AF_INET6 www1.example",
- gethostbyname2 ("www1.example", AF_INET6),
- "name: www1.example\n"
+ check_hostent ("gethostbyname2 AF_INET6 qm.example",
+ gethostbyname2 ("qm.example", AF_INET6),
+ "name: qm.example\n"
+ "address: 2001:db8::1\n");
+ check_hostent ("gethostbyname2 AF_INET6 q.example",
+ gethostbyname2 ("q.example", AF_INET6),
+ "name: q.example\n"
"address: 2001:db8::1\n");
- check_hostent ("gethostbyname2 AF_INET6 both.example",
- gethostbyname2 ("both.example", AF_INET6),
- "name: both.example\n"
+ check_hostent ("gethostbyname2 AF_INET6 qam.example",
+ gethostbyname2 ("qam.example", AF_INET6),
+ "name: qam.example\n"
"address: 2001:db8::1\n");
+ check_hostent ("gethostbyname2 AF_INET6 qa.example",
+ gethostbyname2 ("qa.example", AF_INET6),
+ "name: qa.example\n"
+ "address: 2001:db8::1\n");
+ /* Additional AF_INET6 tests depend on RES_USE_INET6; see below. */
+}
+
+/* gethostbyname2 tests with RES_USE_INET6 disabled. */
+static void
+test_get2_no_inet6 (void)
+{
+ test_get2_any ();
+
+ check_hostent ("gethostbyname2 AF_INET6 am.example",
+ gethostbyname2 ("am.example", AF_INET6),
+ "error: NO_ADDRESS\n");
+ check_hostent ("gethostbyname2 AF_INET6 a.example",
+ gethostbyname2 ("a.example", AF_INET6),
+ "error: NO_RECOVERY\n");
+}
+
+/* gethostbyname2 tests with RES_USE_INET6 enabled. */
+static void
+test_get2_inet6 (void)
+{
+ test_get2_any ();
+
+ check_hostent ("gethostbyname2 AF_INET6 am.example",
+ gethostbyname2 ("am.example", AF_INET6),
+ "name: am.example\n"
+ "address: ::ffff:192.0.2.17\n");
+ check_hostent ("gethostbyname2 AF_INET6 a.example",
+ gethostbyname2 ("a.example", AF_INET6),
+ "error: NO_RECOVERY\n");
+}
+
+/* Collection of tests which assume no RES_USE_INET6 flag. */
+static void
+test_no_inet6 (void)
+{
+ check_hostent ("gethostbyname (\"a.example\")",
+ gethostbyname ("a.example"),
+ "name: a.example\n"
+ "address: 192.0.2.17\n");
+ check_hostent ("gethostbyname (\"qa.example\")",
+ gethostbyname ("qa.example"),
+ "name: qa.example\n"
+ "address: 192.0.2.17\n");
+ check_hostent ("gethostbyname (\"am.example\")",
+ gethostbyname ("am.example"),
+ "name: am.example\n"
+ "address: 192.0.2.17\n");
+ check_hostent ("gethostbyname (\"qam.example\")",
+ gethostbyname ("qam.example"),
+ "name: qam.example\n"
+ "address: 192.0.2.17\n");
+ check_hostent ("gethostbyname (\"q.example\")",
+ gethostbyname ("q.example"),
+ "error: NO_RECOVERY\n");
+ check_hostent ("gethostbyname (\"qm.example\")",
+ gethostbyname ("qm.example"),
+ "error: NO_ADDRESS\n");
+ test_get2_no_inet6 ();
+ test_get2_no_inet6 ();
+ test_gai ();
+ test_get2_no_inet6 ();
+ test_get2_no_inet6 ();
}
static void *
@@ -153,28 +280,42 @@ threadfunc (void *ignored)
.response_callback = response
});
- check_hostent ("gethostbyname (\"www1.example\")",
- gethostbyname ("www1.example"),
- "name: www1.example\n"
- "address: 192.0.2.17\n");
- check_hostent ("gethostbyname (\"both.example\")",
- gethostbyname ("both.example"),
- "name: both.example\n"
- "address: 192.0.2.17\n");
- test_get2 ();
- test_gai ();
+ TEST_VERIFY ((_res.options & RES_USE_INET6) == 0);
+ test_no_inet6 ();
_res.options |= RES_USE_INET6;
- check_hostent ("gethostbyname (\"www1.example\")",
- gethostbyname ("www1.example"),
- "name: www1.example\n"
+ check_hostent ("gethostbyname (\"a.inet6.example\")",
+ gethostbyname ("a.inet6.example"),
+ "error: NO_RECOVERY\n");
+ check_hostent ("gethostbyname (\"am.inet6.example\")",
+ gethostbyname ("am.inet6.example"),
+ "name: am.inet6.example\n"
+ "address: ::ffff:192.0.2.17\n");
+ check_hostent ("gethostbyname (\"qa.inet6.example\")",
+ gethostbyname ("qa.inet6.example"),
+ "name: qa.inet6.example\n"
+ "address: 2001:db8::1\n");
+ check_hostent ("gethostbyname (\"qam.inet6.example\")",
+ gethostbyname ("qam.inet6.example"),
+ "name: qam.inet6.example\n"
"address: 2001:db8::1\n");
- check_hostent ("gethostbyname (\"both.example\")",
- gethostbyname ("both.example"),
- "name: both.example\n"
+ check_hostent ("gethostbyname (\"q.inet6.example\")",
+ gethostbyname ("q.inet6.example"),
+ "name: q.inet6.example\n"
"address: 2001:db8::1\n");
- test_get2 ();
+ check_hostent ("gethostbyname (\"qm.inet6.example\")",
+ gethostbyname ("qm.inet6.example"),
+ "name: qm.inet6.example\n"
+ "address: 2001:db8::1\n");
+ test_get2_inet6 ();
+ test_get2_inet6 ();
test_gai ();
+ test_get2_inet6 ();
+ test_get2_inet6 ();
+
+ TEST_VERIFY (_res.options & RES_USE_INET6);
+ _res.options &= ~RES_USE_INET6;
+ test_no_inet6 ();
resolv_test_end (obj);
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