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glibc/resolv/tst-resolv-ai_idn-common.c

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/* Common code for AI_IDN/NI_IDN tests.
Copyright (C) 2018-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C 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.
The GNU C 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* Before including this file, TEST_USE_UTF8 must be defined to 1 or
0, depending on whether a UTF-8 locale is used or a Latin-1
locale. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/check_nss.h>
#include <support/resolv_test.h>
#include <support/support.h>
/* Name of the shared object for libidn2. */
#define LIBIDN2_SONAME "libidn2.so.0"
#if TEST_USE_UTF8
/* UTF-8 encoding of "nämchen" (German for “namelet”). */
# define NAEMCHEN "n\xC3\xA4mchen"
/* UTF-8 encoding of "שם" (Hebrew for “name”). */
# define SHEM "\xD7\xA9\xD7\x9D"
/* UTF-8 encoding of "buße" (German for “penance”). This used to be
encoded as "busse" (“busses”) in IDNA2003. */
# define BUSSE "bu\xC3\x9F""e"
#else
/* Latin-1 encodings, as far as they are available. */
# define NAEMCHEN "n\xE4mchen"
# define BUSSE "bu\xDF""e"
#endif
/* IDNA encoding of NAEMCHEN. */
#define NAEMCHEN_IDNA "xn--nmchen-bua"
/* IDNA encoding of NAEMCHEN "_zwo". */
#define NAEMCHEN_ZWO_IDNA "xn--nmchen_zwo-q5a"
/* IDNA encoding of SHEM. */
#define SHEM_IDNA "xn--iebx"
/* IDNA encoding of BUSSE. */
#define BUSSE_IDNA "xn--bue-6ka"
/* IDNA encoding of "שם1". */
#define SHEM1_IDNA "xn--1-qic9a"
/* Another IDNA name. */
#define ANDERES_NAEMCHEN "anderes-" NAEMCHEN
#define ANDERES_NAEMCHEN_IDNA "xn--anderes-nmchen-eib"
/* Controls the kind of test data in a PTR lookup response. */
enum gni_test
{
gni_non_idn_name,
gni_non_idn_cname_to_non_idn_name,
gni_non_idn_cname_to_idn_name,
gni_idn_name,
gni_idn_shem,
gni_idn_shem1,
gni_idn_cname_to_non_idn_name,
gni_idn_cname_to_idn_name,
gni_invalid_idn_1,
gni_invalid_idn_2,
};
/* Called from response below. The LSB (first byte) controls what
goes into the response, see enum gni_test. */
static void
response_ptr (const struct resolv_response_context *ctx,
struct resolv_response_builder *b, const char *qname)
{
int comp[4] = { 0 };
TEST_COMPARE (sscanf (qname, "%d.%d.%d.%d.in-addr.arpa",
&comp[0], &comp[1], &comp[2], &comp[3]), 4);
const char *next_name;
switch ((enum gni_test) comp[0])
{
/* First name in response is non-IDN name. */
case gni_non_idn_name:
resolv_response_open_record (b, qname, C_IN, T_PTR, 0);
resolv_response_add_name (b, "non-idn.example");
resolv_response_close_record (b);
return;
case gni_non_idn_cname_to_non_idn_name:
resolv_response_open_record (b, qname, C_IN, T_CNAME, 0);
next_name = "non-idn-cname.example";
resolv_response_add_name (b, next_name);
resolv_response_close_record (b);
resolv_response_open_record (b, next_name, C_IN, T_PTR, 0);
resolv_response_add_name (b, "non-idn-name.example");
resolv_response_close_record (b);
return;
case gni_non_idn_cname_to_idn_name:
resolv_response_open_record (b, qname, C_IN, T_CNAME, 0);
next_name = "non-idn-cname.example";
resolv_response_add_name (b, next_name);
resolv_response_close_record (b);
resolv_response_open_record (b, next_name, C_IN, T_PTR, 0);
resolv_response_add_name (b, NAEMCHEN_IDNA ".example");
resolv_response_close_record (b);
return;
/* First name in response is IDN name. */
case gni_idn_name:
resolv_response_open_record (b, qname, C_IN, T_PTR, 0);
resolv_response_add_name (b, "xn--nmchen-bua.example");
resolv_response_close_record (b);
return;
case gni_idn_shem:
resolv_response_open_record (b, qname, C_IN, T_PTR, 0);
resolv_response_add_name (b, SHEM_IDNA ".example");
resolv_response_close_record (b);
return;
case gni_idn_shem1:
resolv_response_open_record (b, qname, C_IN, T_PTR, 0);
resolv_response_add_name (b, SHEM1_IDNA ".example");
resolv_response_close_record (b);
return;
case gni_idn_cname_to_non_idn_name:
resolv_response_open_record (b, qname, C_IN, T_CNAME, 0);
next_name = NAEMCHEN_IDNA ".example";
resolv_response_add_name (b, next_name);
resolv_response_close_record (b);
resolv_response_open_record (b, next_name, C_IN, T_PTR, 0);
resolv_response_add_name (b, "non-idn-name.example");
resolv_response_close_record (b);
return;
case gni_idn_cname_to_idn_name:
resolv_response_open_record (b, qname, C_IN, T_CNAME, 0);
next_name = NAEMCHEN_IDNA ".example";
resolv_response_add_name (b, next_name);
resolv_response_close_record (b);
resolv_response_open_record (b, next_name, C_IN, T_PTR, 0);
resolv_response_add_name (b, ANDERES_NAEMCHEN_IDNA ".example");
resolv_response_close_record (b);
return;
/* Invalid IDN encodings. */
case gni_invalid_idn_1:
resolv_response_open_record (b, qname, C_IN, T_PTR, 0);
resolv_response_add_name (b, "xn---.example");
resolv_response_close_record (b);
return;
case gni_invalid_idn_2:
resolv_response_open_record (b, qname, C_IN, T_PTR, 0);
resolv_response_add_name (b, "xn--x.example");
resolv_response_close_record (b);
return;
}
FAIL_EXIT1 ("invalid PTR query: %s", qname);
}
/* For PTR responses, see above. A/AAAA queries can request
additional CNAMEs in the response by include ".cname." and
".idn-cname." in the query. The LSB in the address contains the
first byte of the QNAME. */
static void
response (const struct resolv_response_context *ctx,
struct resolv_response_builder *b,
const char *qname, uint16_t qclass, uint16_t qtype)
{
TEST_VERIFY_EXIT (qclass == C_IN);
for (const char *p = qname; *p != '\0'; ++p)
if (!(('0' <= *p && *p <= '9')
|| ('a' <= *p && *p <= 'z')
|| ('A' <= *p && *p <= 'Z')
|| *p == '.' || *p == '-' || *p == '_'))
{
/* Non-ASCII query. Reply with NXDOMAIN. */
struct resolv_response_flags flags = { .rcode = 3 };
resolv_response_init (b, flags);
resolv_response_add_question (b, qname, qclass, qtype);
return;
}
struct resolv_response_flags flags = { 0 };
resolv_response_init (b, flags);
resolv_response_add_question (b, qname, qclass, qtype);
resolv_response_section (b, ns_s_an);
if (qtype == T_PTR)
{
response_ptr (ctx, b, qname);
return;
}
bool with_cname = strstr (qname, ".cname.") != NULL;
bool with_idn_cname = strstr (qname, ".idn-cname.") != NULL;
const char *next_name = qname;
if (with_cname)
{
next_name = "non-idn-cname.example";
resolv_response_open_record (b, qname, C_IN, T_CNAME, 0);
resolv_response_add_name (b, next_name);
resolv_response_close_record (b);
}
if (with_idn_cname)
{
const char *previous_name = next_name;
next_name = ANDERES_NAEMCHEN_IDNA ".example";
resolv_response_open_record (b, previous_name, C_IN, T_CNAME, 0);
resolv_response_add_name (b, next_name);
resolv_response_close_record (b);
}
resolv_response_open_record (b, next_name, C_IN, qtype, 0);
switch (qtype)
{
case T_A:
{
char addr[4] = { 192, 0, 2, qname[0] };
resolv_response_add_data (b, &addr, sizeof (addr));
}
break;
case T_AAAA:
{
char addr[16]
= { 0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
qname[0] };
resolv_response_add_data (b, &addr, sizeof (addr));
}
break;
default:
FAIL_EXIT1 ("invalid qtype: %d", qtype);
}
resolv_response_close_record (b);
}
/* Check the result of a getaddrinfo call. */
static void
check_ai (const char *name, int ai_flags, const char *expected)
{
struct addrinfo hints =
{
.ai_flags = ai_flags,
.ai_family = AF_INET,
.ai_socktype = SOCK_STREAM,
};
struct addrinfo *ai;
char *query = xasprintf ("%s:80 AF_INET/0x%x", name, ai_flags);
int ret = getaddrinfo (name, "80", &hints, &ai);
check_addrinfo (query, ai, ret, expected);
if (ret == 0)
freeaddrinfo (ai);
free (query);
}
/* Run one getnameinfo test. FLAGS is automatically augmented with
NI_NUMERICSERV. */
static void
gni_test (enum gni_test code, unsigned int flags, const char *expected)
{
struct sockaddr_in sin =
{
.sin_family = AF_INET,
.sin_port = htons (80),
.sin_addr = { htonl (0xc0000200 | code) }, /* 192.0.2.0/24 network. */
};
char host[1024];
char service[1024];
int ret = getnameinfo ((const struct sockaddr *) &sin, sizeof (sin),
host, sizeof (host), service, sizeof (service),
flags| NI_NUMERICSERV);
if (ret != 0)
{
if (expected == NULL)
TEST_COMPARE (ret, EAI_IDN_ENCODE);
else
{
support_record_failure ();
printf ("error: getnameinfo failed (code %d, flags 0x%x): %s (%d)\n",
(int) code, flags, gai_strerror (ret), ret);
}
}
else if (ret == 0 && expected == NULL)
{
support_record_failure ();
printf ("error: getnameinfo unexpected success (code %d, flags 0x%x)\n",
(int) code, flags);
}
else if (strcmp (host, expected) != 0 || strcmp (service, "80") != 0)
{
support_record_failure ();
printf ("error: getnameinfo test failure (code %d, flags 0x%x)\n"
" expected host: \"%s\"\n"
" expected service: \"80\"\n"
" actual host: \"%s\"\n"
" actual service: \"%s\"\n",
(int) code, flags, expected, host, service);
}
}
/* Tests for getaddrinfo which assume a working libidn2 library. */
__attribute__ ((unused))
static void
gai_tests_with_libidn2 (void)
{
/* No CNAME. */
check_ai ("non-idn.example", 0,
"address: STREAM/TCP 192.0.2.110 80\n");
check_ai ("non-idn.example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.110 80\n");
check_ai ("non-idn.example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: non-idn.example\n"
"address: STREAM/TCP 192.0.2.110 80\n");
check_ai (NAEMCHEN ".example", 0,
"error: Name or service not known\n");
check_ai (NAEMCHEN ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (NAEMCHEN ".example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " NAEMCHEN ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
#if TEST_USE_UTF8
check_ai (SHEM ".example", 0,
"error: Name or service not known\n");
check_ai (SHEM ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM ".example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " SHEM ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM ".example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " SHEM_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM "1.example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM "1.example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " SHEM "1.example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM "1.example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " SHEM1_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
#endif
/* Check that non-transitional mode is active. German sharp S
should not turn into SS. */
check_ai (BUSSE ".example", 0,
"error: Name or service not known\n");
check_ai (BUSSE ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (BUSSE ".example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " BUSSE_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (BUSSE ".example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " BUSSE ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
/* Check that Unicode TR 46 mode is active. Underscores should be
permitted in IDNA components. */
check_ai (NAEMCHEN "_zwo.example", 0,
"error: Name or service not known\n");
check_ai (NAEMCHEN "_zwo.example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (NAEMCHEN "_zwo.example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " NAEMCHEN_ZWO_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (NAEMCHEN "_zwo.example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " NAEMCHEN "_zwo.example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
/* No CNAME, but already IDN-encoded. */
check_ai (NAEMCHEN_IDNA ".example", 0,
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (NAEMCHEN_IDNA ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (NAEMCHEN_IDNA ".example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " NAEMCHEN_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (NAEMCHEN_IDNA ".example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " NAEMCHEN ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM_IDNA ".example", 0,
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM_IDNA ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.120 80\n");
check_ai (SHEM_IDNA ".example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " SHEM_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
#if TEST_USE_UTF8
check_ai (SHEM_IDNA ".example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " SHEM ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
#else
check_ai (SHEM_IDNA ".example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " SHEM_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
#endif
/* Invalid IDNA canonical name is returned as-is. */
check_ai ("xn---.example", AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_CANONIDN\n"
"canonname: xn---.example\n"
"address: STREAM/TCP 192.0.2.120 80\n");
/* Non-IDN CNAME. */
check_ai ("with.cname.example", 0,
"address: STREAM/TCP 192.0.2.119 80\n");
check_ai ("with.cname.example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.119 80\n");
check_ai ("with.cname.example", AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: non-idn-cname.example\n"
"address: STREAM/TCP 192.0.2.119 80\n");
check_ai ("with.cname." NAEMCHEN ".example", 0,
"error: Name or service not known\n");
check_ai ("with.cname." NAEMCHEN ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.119 80\n");
check_ai ("with.cname." NAEMCHEN ".example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: non-idn-cname.example\n"
"address: STREAM/TCP 192.0.2.119 80\n");
check_ai ("with.cname." NAEMCHEN ".example",
AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: non-idn-cname.example\n"
"address: STREAM/TCP 192.0.2.119 80\n");
/* IDN CNAME. */
check_ai ("With.idn-cname.example", 0,
"address: STREAM/TCP 192.0.2.87 80\n");
check_ai ("With.idn-cname.example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.87 80\n");
check_ai ("With.idn-cname.example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " ANDERES_NAEMCHEN_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.87 80\n");
check_ai ("With.idn-cname.example",
AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " ANDERES_NAEMCHEN ".example\n"
"address: STREAM/TCP 192.0.2.87 80\n");
check_ai ("With.idn-cname." NAEMCHEN ".example", 0,
"error: Name or service not known\n");
check_ai ("With.idn-cname." NAEMCHEN ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.119 80\n");
check_ai ("With.idn-cname." NAEMCHEN ".example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " ANDERES_NAEMCHEN_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.119 80\n");
check_ai ("With.idn-cname." NAEMCHEN ".example",
AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " ANDERES_NAEMCHEN ".example\n"
"address: STREAM/TCP 192.0.2.119 80\n");
/* Non-IDN to IDN CNAME chain. */
check_ai ("both.cname.idn-cname.example", 0,
"address: STREAM/TCP 192.0.2.98 80\n");
check_ai ("both.cname.idn-cname.example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.98 80\n");
check_ai ("both.cname.idn-cname.example", AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " ANDERES_NAEMCHEN_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.98 80\n");
check_ai ("both.cname.idn-cname.example",
AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " ANDERES_NAEMCHEN ".example\n"
"address: STREAM/TCP 192.0.2.98 80\n");
check_ai ("both.cname.idn-cname." NAEMCHEN ".example", 0,
"error: Name or service not known\n");
check_ai ("both.cname.idn-cname." NAEMCHEN ".example", AI_IDN,
"flags: AI_IDN\n"
"address: STREAM/TCP 192.0.2.98 80\n");
check_ai ("both.cname.idn-cname." NAEMCHEN ".example",
AI_IDN | AI_CANONNAME,
"flags: AI_CANONNAME AI_IDN\n"
"canonname: " ANDERES_NAEMCHEN_IDNA ".example\n"
"address: STREAM/TCP 192.0.2.98 80\n");
check_ai ("both.cname.idn-cname." NAEMCHEN ".example",
AI_IDN | AI_CANONNAME | AI_CANONIDN,
"flags: AI_CANONNAME AI_IDN AI_CANONIDN\n"
"canonname: " ANDERES_NAEMCHEN ".example\n"
"address: STREAM/TCP 192.0.2.98 80\n");
}
/* Tests for getnameinfo which assume a working libidn2 library. */
__attribute__ ((unused))
static void
gni_tests_with_libidn2 (void)
{
gni_test (gni_non_idn_name, 0, "non-idn.example");
gni_test (gni_non_idn_name, NI_IDN, "non-idn.example");
gni_test (gni_non_idn_name, NI_NUMERICHOST, "192.0.2.0");
gni_test (gni_non_idn_name, NI_NUMERICHOST | NI_IDN, "192.0.2.0");
gni_test (gni_non_idn_cname_to_non_idn_name, 0, "non-idn-name.example");
gni_test (gni_non_idn_cname_to_non_idn_name, NI_IDN, "non-idn-name.example");
gni_test (gni_non_idn_cname_to_idn_name, 0, NAEMCHEN_IDNA ".example");
gni_test (gni_non_idn_cname_to_idn_name, NI_IDN, NAEMCHEN ".example");
gni_test (gni_idn_name, 0, NAEMCHEN_IDNA ".example");
gni_test (gni_idn_name, NI_IDN, NAEMCHEN ".example");
gni_test (gni_idn_shem, 0, SHEM_IDNA ".example");
gni_test (gni_idn_shem1, 0, SHEM1_IDNA ".example");
#if TEST_USE_UTF8
gni_test (gni_idn_shem, NI_IDN, SHEM ".example");
gni_test (gni_idn_shem1, NI_IDN, SHEM "1.example");
#else
gni_test (gni_idn_shem, NI_IDN, SHEM_IDNA ".example");
gni_test (gni_idn_shem1, NI_IDN, SHEM1_IDNA ".example");
#endif
gni_test (gni_idn_cname_to_non_idn_name, 0, "non-idn-name.example");
gni_test (gni_idn_cname_to_non_idn_name, NI_IDN, "non-idn-name.example");
gni_test (gni_idn_cname_to_idn_name, 0, ANDERES_NAEMCHEN_IDNA ".example");
gni_test (gni_idn_cname_to_idn_name, NI_IDN, ANDERES_NAEMCHEN ".example");
/* Test encoding errors. */
gni_test (gni_invalid_idn_1, 0, "xn---.example");
gni_test (gni_invalid_idn_1, NI_IDN, "xn---.example");
gni_test (gni_invalid_idn_2, 0, "xn--x.example");
gni_test (gni_invalid_idn_2, NI_IDN, "xn--x.example");
}
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