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Systemd/src/test/test-dns-domain.c
Zbigniew Jędrzejewski-Szmek 0926f3489d resolved: make sure idn2 conversions are roundtrippable 
While working on the gateway→_gateway conversion, I noticed that
libidn2 strips the leading underscore in some names.
https://gitlab.com/libidn/libidn2/issues/30 was resolved in
05d753ea69,
which disabled "STD3 ASCII rules" by default, i.e. disabled stripping
of underscores. So the situation is that with previously released libidn2
versions we would get incorrect behaviour, and once new libidn2 is released,
we should be OK.

Let's implement a simple test which checks that the name survives the
roundtrip, and if it doesn't, skip IDN resolution. Under old libidn2 this will
fail in more cases, and under new libidn2 in fewer, but should be the right
thing to do also under new libidn2.
2017-07-21 08:00:23 -04:00

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/***
This file is part of systemd.
Copyright 2014 Lennart Poettering
systemd 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.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "alloc-util.h"
#include "dns-domain.h"
#include "macro.h"
#include "string-util.h"
static void test_dns_label_unescape_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
char buffer[buffer_sz];
int r;
r = dns_label_unescape(&what, buffer, buffer_sz);
assert_se(r == ret);
if (r < 0)
return;
assert_se(streq(buffer, expect));
}
static void test_dns_label_unescape(void) {
test_dns_label_unescape_one("hallo", "hallo", 6, 5);
test_dns_label_unescape_one("hallo", "hallo", 4, -ENOBUFS);
test_dns_label_unescape_one("", "", 10, 0);
test_dns_label_unescape_one("hallo\\.foobar", "hallo.foobar", 20, 12);
test_dns_label_unescape_one("hallo.foobar", "hallo", 10, 5);
test_dns_label_unescape_one("hallo\n.foobar", "hallo", 20, -EINVAL);
test_dns_label_unescape_one("hallo\\", "hallo", 20, -EINVAL);
test_dns_label_unescape_one("hallo\\032 ", "hallo ", 20, 7);
test_dns_label_unescape_one(".", "", 20, 0);
test_dns_label_unescape_one("..", "", 20, -EINVAL);
test_dns_label_unescape_one(".foobar", "", 20, -EINVAL);
test_dns_label_unescape_one("foobar.", "foobar", 20, 6);
test_dns_label_unescape_one("foobar..", "foobar", 20, -EINVAL);
}
static void test_dns_name_to_wire_format_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
uint8_t buffer[buffer_sz];
int r;
r = dns_name_to_wire_format(what, buffer, buffer_sz, false);
assert_se(r == ret);
if (r < 0)
return;
assert_se(!memcmp(buffer, expect, r));
}
static void test_dns_name_to_wire_format(void) {
static const char out0[] = { 0 };
static const char out1[] = { 3, 'f', 'o', 'o', 0 };
static const char out2[] = { 5, 'h', 'a', 'l', 'l', 'o', 3, 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
static const char out3[] = { 4, ' ', 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
static const char out4[] = { 9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
3, 'a', '1', '2', 0 };
test_dns_name_to_wire_format_one("", out0, sizeof(out0), sizeof(out0));
test_dns_name_to_wire_format_one("foo", out1, sizeof(out1), sizeof(out1));
test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) + 1, sizeof(out1));
test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) - 1, -ENOBUFS);
test_dns_name_to_wire_format_one("hallo.foo.bar", out2, sizeof(out2), sizeof(out2));
test_dns_name_to_wire_format_one("hallo.foo..bar", NULL, 32, -EINVAL);
test_dns_name_to_wire_format_one("\\032foo.bar", out3, sizeof(out3), sizeof(out3));
test_dns_name_to_wire_format_one("a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a123", NULL, 500, -EINVAL);
test_dns_name_to_wire_format_one("a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12", out4, sizeof(out4), sizeof(out4));
}
static void test_dns_label_unescape_suffix_one(const char *what, const char *expect1, const char *expect2, size_t buffer_sz, int ret1, int ret2) {
char buffer[buffer_sz];
const char *label;
int r;
label = what + strlen(what);
r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
assert_se(r == ret1);
if (r >= 0)
assert_se(streq(buffer, expect1));
r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
assert_se(r == ret2);
if (r >= 0)
assert_se(streq(buffer, expect2));
}
static void test_dns_label_unescape_suffix(void) {
test_dns_label_unescape_suffix_one("hallo", "hallo", "", 6, 5, 0);
test_dns_label_unescape_suffix_one("hallo", "hallo", "", 4, -ENOBUFS, -ENOBUFS);
test_dns_label_unescape_suffix_one("", "", "", 10, 0, 0);
test_dns_label_unescape_suffix_one("hallo\\.foobar", "hallo.foobar", "", 20, 12, 0);
test_dns_label_unescape_suffix_one("hallo.foobar", "foobar", "hallo", 10, 6, 5);
test_dns_label_unescape_suffix_one("hallo.foobar\n", "foobar", "foobar", 20, -EINVAL, -EINVAL);
test_dns_label_unescape_suffix_one("hallo\\", "hallo", "hallo", 20, -EINVAL, -EINVAL);
test_dns_label_unescape_suffix_one("hallo\\032 ", "hallo ", "", 20, 7, 0);
test_dns_label_unescape_suffix_one(".", "", "", 20, 0, 0);
test_dns_label_unescape_suffix_one("..", "", "", 20, 0, -EINVAL);
test_dns_label_unescape_suffix_one(".foobar", "foobar", "", 20, 6, -EINVAL);
test_dns_label_unescape_suffix_one("foobar.", "foobar", "", 20, 6, 0);
test_dns_label_unescape_suffix_one("foo\\\\bar", "foo\\bar", "", 20, 7, 0);
test_dns_label_unescape_suffix_one("foo.bar", "bar", "foo", 20, 3, 3);
test_dns_label_unescape_suffix_one("foo..bar", "bar", "", 20, 3, -EINVAL);
test_dns_label_unescape_suffix_one("foo...bar", "bar", "", 20, 3, -EINVAL);
test_dns_label_unescape_suffix_one("foo\\.bar", "foo.bar", "", 20, 7, 0);
test_dns_label_unescape_suffix_one("foo\\\\.bar", "bar", "foo\\", 20, 3, 4);
test_dns_label_unescape_suffix_one("foo\\\\\\.bar", "foo\\.bar", "", 20, 8, 0);
}
static void test_dns_label_escape_one(const char *what, size_t l, const char *expect, int ret) {
_cleanup_free_ char *t = NULL;
int r;
r = dns_label_escape_new(what, l, &t);
assert_se(r == ret);
if (r < 0)
return;
assert_se(streq_ptr(expect, t));
}
static void test_dns_label_escape(void) {
test_dns_label_escape_one("", 0, NULL, -EINVAL);
test_dns_label_escape_one("hallo", 5, "hallo", 5);
test_dns_label_escape_one("hallo", 6, "hallo\\000", 9);
test_dns_label_escape_one("hallo hallo.foobar,waldi", 24, "hallo\\032hallo\\.foobar\\044waldi", 31);
}
static void test_dns_name_normalize_one(const char *what, const char *expect, int ret) {
_cleanup_free_ char *t = NULL;
int r;
r = dns_name_normalize(what, &t);
assert_se(r == ret);
if (r < 0)
return;
assert_se(streq_ptr(expect, t));
}
static void test_dns_name_normalize(void) {
test_dns_name_normalize_one("", ".", 0);
test_dns_name_normalize_one("f", "f", 0);
test_dns_name_normalize_one("f.waldi", "f.waldi", 0);
test_dns_name_normalize_one("f \\032.waldi", "f\\032\\032.waldi", 0);
test_dns_name_normalize_one("\\000", "\\000", 0);
test_dns_name_normalize_one("..", NULL, -EINVAL);
test_dns_name_normalize_one(".foobar", NULL, -EINVAL);
test_dns_name_normalize_one("foobar.", "foobar", 0);
test_dns_name_normalize_one(".", ".", 0);
}
static void test_dns_name_equal_one(const char *a, const char *b, int ret) {
int r;
r = dns_name_equal(a, b);
assert_se(r == ret);
r = dns_name_equal(b, a);
assert_se(r == ret);
}
static void test_dns_name_equal(void) {
test_dns_name_equal_one("", "", true);
test_dns_name_equal_one("x", "x", true);
test_dns_name_equal_one("x", "x.", true);
test_dns_name_equal_one("abc.def", "abc.def", true);
test_dns_name_equal_one("abc.def", "ABC.def", true);
test_dns_name_equal_one("abc.def", "CBA.def", false);
test_dns_name_equal_one("", "xxx", false);
test_dns_name_equal_one("ab", "a", false);
test_dns_name_equal_one("\\000", "\\000", true);
test_dns_name_equal_one(".", "", true);
test_dns_name_equal_one(".", ".", true);
test_dns_name_equal_one("..", "..", -EINVAL);
}
static void test_dns_name_between_one(const char *a, const char *b, const char *c, int ret) {
int r;
r = dns_name_between(a, b, c);
assert_se(r == ret);
r = dns_name_between(c, b, a);
if (ret >= 0)
assert_se(r == 0);
else
assert_se(r == ret);
}
static void test_dns_name_between(void) {
/* see https://tools.ietf.org/html/rfc4034#section-6.1
Note that we use "\033.z.example" in stead of "\001.z.example" as we
consider the latter invalid */
test_dns_name_between_one("example", "a.example", "yljkjljk.a.example", true);
test_dns_name_between_one("a.example", "yljkjljk.a.example", "Z.a.example", true);
test_dns_name_between_one("yljkjljk.a.example", "Z.a.example", "zABC.a.EXAMPLE", true);
test_dns_name_between_one("Z.a.example", "zABC.a.EXAMPLE", "z.example", true);
test_dns_name_between_one("zABC.a.EXAMPLE", "z.example", "\\033.z.example", true);
test_dns_name_between_one("z.example", "\\033.z.example", "*.z.example", true);
test_dns_name_between_one("\\033.z.example", "*.z.example", "\\200.z.example", true);
test_dns_name_between_one("*.z.example", "\\200.z.example", "example", true);
test_dns_name_between_one("\\200.z.example", "example", "a.example", true);
test_dns_name_between_one("example", "a.example", "example", -EINVAL);
test_dns_name_between_one("example", "example", "yljkjljk.a.example", false);
test_dns_name_between_one("example", "yljkjljk.a.example", "yljkjljk.a.example", false);
}
static void test_dns_name_endswith_one(const char *a, const char *b, int ret) {
assert_se(dns_name_endswith(a, b) == ret);
}
static void test_dns_name_endswith(void) {
test_dns_name_endswith_one("", "", true);
test_dns_name_endswith_one("", "xxx", false);
test_dns_name_endswith_one("xxx", "", true);
test_dns_name_endswith_one("x", "x", true);
test_dns_name_endswith_one("x", "y", false);
test_dns_name_endswith_one("x.y", "y", true);
test_dns_name_endswith_one("x.y", "Y", true);
test_dns_name_endswith_one("x.y", "x", false);
test_dns_name_endswith_one("x.y.z", "Z", true);
test_dns_name_endswith_one("x.y.z", "y.Z", true);
test_dns_name_endswith_one("x.y.z", "x.y.Z", true);
test_dns_name_endswith_one("x.y.z", "waldo", false);
test_dns_name_endswith_one("x.y.z.u.v.w", "y.z", false);
test_dns_name_endswith_one("x.y.z.u.v.w", "u.v.w", true);
test_dns_name_endswith_one("x.y\001.z", "waldo", -EINVAL);
}
static void test_dns_name_startswith_one(const char *a, const char *b, int ret) {
assert_se(dns_name_startswith(a, b) == ret);
}
static void test_dns_name_startswith(void) {
test_dns_name_startswith_one("", "", true);
test_dns_name_startswith_one("", "xxx", false);
test_dns_name_startswith_one("xxx", "", true);
test_dns_name_startswith_one("x", "x", true);
test_dns_name_startswith_one("x", "y", false);
test_dns_name_startswith_one("x.y", "x.y", true);
test_dns_name_startswith_one("x.y", "y.x", false);
test_dns_name_startswith_one("x.y", "x", true);
test_dns_name_startswith_one("x.y", "X", true);
test_dns_name_startswith_one("x.y", "y", false);
test_dns_name_startswith_one("x.y", "", true);
test_dns_name_startswith_one("x.y", "X", true);
}
static void test_dns_name_is_root(void) {
assert_se(dns_name_is_root(""));
assert_se(dns_name_is_root("."));
assert_se(!dns_name_is_root("xxx"));
assert_se(!dns_name_is_root("xxx."));
assert_se(!dns_name_is_root(".."));
}
static void test_dns_name_is_single_label(void) {
assert_se(!dns_name_is_single_label(""));
assert_se(!dns_name_is_single_label("."));
assert_se(!dns_name_is_single_label(".."));
assert_se(dns_name_is_single_label("x"));
assert_se(dns_name_is_single_label("x."));
assert_se(!dns_name_is_single_label("xx.yy"));
}
static void test_dns_name_reverse_one(const char *address, const char *name) {
_cleanup_free_ char *p = NULL;
union in_addr_union a, b = {};
int familya, familyb;
assert_se(in_addr_from_string_auto(address, &familya, &a) >= 0);
assert_se(dns_name_reverse(familya, &a, &p) >= 0);
assert_se(streq(p, name));
assert_se(dns_name_address(p, &familyb, &b) > 0);
assert_se(familya == familyb);
assert_se(in_addr_equal(familya, &a, &b));
}
static void test_dns_name_reverse(void) {
test_dns_name_reverse_one("47.11.8.15", "15.8.11.47.in-addr.arpa");
test_dns_name_reverse_one("fe80::47", "7.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa");
test_dns_name_reverse_one("127.0.0.1", "1.0.0.127.in-addr.arpa");
test_dns_name_reverse_one("::1", "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa");
}
static void test_dns_name_concat_one(const char *a, const char *b, int r, const char *result) {
_cleanup_free_ char *p = NULL;
assert_se(dns_name_concat(a, b, &p) == r);
assert_se(streq_ptr(p, result));
}
static void test_dns_name_concat(void) {
test_dns_name_concat_one("", "", 0, ".");
test_dns_name_concat_one(".", "", 0, ".");
test_dns_name_concat_one("", ".", 0, ".");
test_dns_name_concat_one(".", ".", 0, ".");
test_dns_name_concat_one("foo", "bar", 0, "foo.bar");
test_dns_name_concat_one("foo.foo", "bar.bar", 0, "foo.foo.bar.bar");
test_dns_name_concat_one("foo", NULL, 0, "foo");
test_dns_name_concat_one("foo", ".", 0, "foo");
test_dns_name_concat_one("foo.", "bar.", 0, "foo.bar");
test_dns_name_concat_one(NULL, NULL, 0, ".");
test_dns_name_concat_one(NULL, ".", 0, ".");
test_dns_name_concat_one(NULL, "foo", 0, "foo");
}
static void test_dns_name_is_valid_one(const char *s, int ret) {
assert_se(dns_name_is_valid(s) == ret);
}
static void test_dns_name_is_valid(void) {
test_dns_name_is_valid_one("foo", 1);
test_dns_name_is_valid_one("foo.", 1);
test_dns_name_is_valid_one("foo..", 0);
test_dns_name_is_valid_one("Foo", 1);
test_dns_name_is_valid_one("foo.bar", 1);
test_dns_name_is_valid_one("foo.bar.baz", 1);
test_dns_name_is_valid_one("", 1);
test_dns_name_is_valid_one("foo..bar", 0);
test_dns_name_is_valid_one(".foo.bar", 0);
test_dns_name_is_valid_one("foo.bar.", 1);
test_dns_name_is_valid_one("foo.bar..", 0);
test_dns_name_is_valid_one("\\zbar", 0);
test_dns_name_is_valid_one("ä", 1);
test_dns_name_is_valid_one("\n", 0);
/* 256 characters */
test_dns_name_is_valid_one("a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345", 0);
/* 255 characters */
test_dns_name_is_valid_one("a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a1234", 0);
/* 254 characters */
test_dns_name_is_valid_one("a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a123", 0);
/* 253 characters */
test_dns_name_is_valid_one("a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12345678.a12", 1);
/* label of 64 chars length */
test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a123", 0);
/* label of 63 chars length */
test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a12", 1);
}
static void test_dns_service_name_is_valid(void) {
assert_se(dns_service_name_is_valid("Lennart's Compüter"));
assert_se(dns_service_name_is_valid("piff.paff"));
assert_se(!dns_service_name_is_valid(NULL));
assert_se(!dns_service_name_is_valid(""));
assert_se(!dns_service_name_is_valid("foo\nbar"));
assert_se(!dns_service_name_is_valid("foo\201bar"));
assert_se(!dns_service_name_is_valid("this is an overly long string that is certainly longer than 63 characters"));
}
static void test_dns_srv_type_is_valid(void) {
assert_se(dns_srv_type_is_valid("_http._tcp"));
assert_se(dns_srv_type_is_valid("_foo-bar._tcp"));
assert_se(dns_srv_type_is_valid("_w._udp"));
assert_se(dns_srv_type_is_valid("_a800._tcp"));
assert_se(dns_srv_type_is_valid("_a-800._tcp"));
assert_se(!dns_srv_type_is_valid(NULL));
assert_se(!dns_srv_type_is_valid(""));
assert_se(!dns_srv_type_is_valid("x"));
assert_se(!dns_srv_type_is_valid("_foo"));
assert_se(!dns_srv_type_is_valid("_tcp"));
assert_se(!dns_srv_type_is_valid("_"));
assert_se(!dns_srv_type_is_valid("_foo."));
assert_se(!dns_srv_type_is_valid("_föo._tcp"));
assert_se(!dns_srv_type_is_valid("_f\no._tcp"));
assert_se(!dns_srv_type_is_valid("_800._tcp"));
assert_se(!dns_srv_type_is_valid("_-800._tcp"));
assert_se(!dns_srv_type_is_valid("_-foo._tcp"));
assert_se(!dns_srv_type_is_valid("_piep._foo._udp"));
}
static void test_dns_service_join_one(const char *a, const char *b, const char *c, int r, const char *d) {
_cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
assert_se(dns_service_join(a, b, c, &t) == r);
assert_se(streq_ptr(t, d));
if (r < 0)
return;
assert_se(dns_service_split(t, &x, &y, &z) >= 0);
assert_se(streq_ptr(a, x));
assert_se(streq_ptr(b, y));
assert_se(dns_name_equal(c, z) > 0);
}
static void test_dns_service_join(void) {
test_dns_service_join_one("", "", "", -EINVAL, NULL);
test_dns_service_join_one("", "_http._tcp", "", -EINVAL, NULL);
test_dns_service_join_one("", "_http._tcp", "foo", -EINVAL, NULL);
test_dns_service_join_one("foo", "", "foo", -EINVAL, NULL);
test_dns_service_join_one("foo", "foo", "foo", -EINVAL, NULL);
test_dns_service_join_one("foo", "_http._tcp", "", 0, "foo._http._tcp");
test_dns_service_join_one(NULL, "_http._tcp", "", 0, "_http._tcp");
test_dns_service_join_one("foo", "_http._tcp", "foo", 0, "foo._http._tcp.foo");
test_dns_service_join_one(NULL, "_http._tcp", "foo", 0, "_http._tcp.foo");
test_dns_service_join_one("Lennart's PC", "_pc._tcp", "foo.bar.com", 0, "Lennart\\039s\\032PC._pc._tcp.foo.bar.com");
test_dns_service_join_one(NULL, "_pc._tcp", "foo.bar.com", 0, "_pc._tcp.foo.bar.com");
}
static void test_dns_service_split_one(const char *joined, const char *a, const char *b, const char *c, int r) {
_cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
assert_se(dns_service_split(joined, &x, &y, &z) == r);
assert_se(streq_ptr(x, a));
assert_se(streq_ptr(y, b));
assert_se(streq_ptr(z, c));
if (r < 0)
return;
if (y) {
assert_se(dns_service_join(x, y, z, &t) == 0);
assert_se(dns_name_equal(joined, t) > 0);
} else
assert_se(!x && dns_name_equal(z, joined) > 0);
}
static void test_dns_service_split(void) {
test_dns_service_split_one("", NULL, NULL, ".", 0);
test_dns_service_split_one("foo", NULL, NULL, "foo", 0);
test_dns_service_split_one("foo.bar", NULL, NULL, "foo.bar", 0);
test_dns_service_split_one("_foo.bar", NULL, NULL, "_foo.bar", 0);
test_dns_service_split_one("_foo._bar", NULL, "_foo._bar", ".", 0);
test_dns_service_split_one("_meh._foo._bar", "_meh", "_foo._bar", ".", 0);
test_dns_service_split_one("Wuff\\032Wuff._foo._bar.waldo.com", "Wuff Wuff", "_foo._bar", "waldo.com", 0);
}
static void test_dns_name_change_suffix_one(const char *name, const char *old_suffix, const char *new_suffix, int r, const char *result) {
_cleanup_free_ char *s = NULL;
assert_se(dns_name_change_suffix(name, old_suffix, new_suffix, &s) == r);
assert_se(streq_ptr(s, result));
}
static void test_dns_name_change_suffix(void) {
test_dns_name_change_suffix_one("foo.bar", "bar", "waldo", 1, "foo.waldo");
test_dns_name_change_suffix_one("foo.bar.waldi.quux", "foo.bar.waldi.quux", "piff.paff", 1, "piff.paff");
test_dns_name_change_suffix_one("foo.bar.waldi.quux", "bar.waldi.quux", "piff.paff", 1, "foo.piff.paff");
test_dns_name_change_suffix_one("foo.bar.waldi.quux", "waldi.quux", "piff.paff", 1, "foo.bar.piff.paff");
test_dns_name_change_suffix_one("foo.bar.waldi.quux", "quux", "piff.paff", 1, "foo.bar.waldi.piff.paff");
test_dns_name_change_suffix_one("foo.bar.waldi.quux", "", "piff.paff", 1, "foo.bar.waldi.quux.piff.paff");
test_dns_name_change_suffix_one("", "", "piff.paff", 1, "piff.paff");
test_dns_name_change_suffix_one("", "", "", 1, ".");
test_dns_name_change_suffix_one("a", "b", "c", 0, NULL);
}
static void test_dns_name_suffix_one(const char *name, unsigned n_labels, const char *result, int ret) {
const char *p = NULL;
assert_se(ret == dns_name_suffix(name, n_labels, &p));
assert_se(streq_ptr(p, result));
}
static void test_dns_name_suffix(void) {
test_dns_name_suffix_one("foo.bar", 2, "foo.bar", 0);
test_dns_name_suffix_one("foo.bar", 1, "bar", 1);
test_dns_name_suffix_one("foo.bar", 0, "", 2);
test_dns_name_suffix_one("foo.bar", 3, NULL, -EINVAL);
test_dns_name_suffix_one("foo.bar", 4, NULL, -EINVAL);
test_dns_name_suffix_one("bar", 1, "bar", 0);
test_dns_name_suffix_one("bar", 0, "", 1);
test_dns_name_suffix_one("bar", 2, NULL, -EINVAL);
test_dns_name_suffix_one("bar", 3, NULL, -EINVAL);
test_dns_name_suffix_one("", 0, "", 0);
test_dns_name_suffix_one("", 1, NULL, -EINVAL);
test_dns_name_suffix_one("", 2, NULL, -EINVAL);
}
static void test_dns_name_count_labels_one(const char *name, int n) {
assert_se(dns_name_count_labels(name) == n);
}
static void test_dns_name_count_labels(void) {
test_dns_name_count_labels_one("foo.bar.quux.", 3);
test_dns_name_count_labels_one("foo.bar.quux", 3);
test_dns_name_count_labels_one("foo.bar.", 2);
test_dns_name_count_labels_one("foo.bar", 2);
test_dns_name_count_labels_one("foo.", 1);
test_dns_name_count_labels_one("foo", 1);
test_dns_name_count_labels_one("", 0);
test_dns_name_count_labels_one(".", 0);
test_dns_name_count_labels_one("..", -EINVAL);
}
static void test_dns_name_equal_skip_one(const char *a, unsigned n_labels, const char *b, int ret) {
assert_se(dns_name_equal_skip(a, n_labels, b) == ret);
}
static void test_dns_name_equal_skip(void) {
test_dns_name_equal_skip_one("foo", 0, "bar", 0);
test_dns_name_equal_skip_one("foo", 0, "foo", 1);
test_dns_name_equal_skip_one("foo", 1, "foo", 0);
test_dns_name_equal_skip_one("foo", 2, "foo", 0);
test_dns_name_equal_skip_one("foo.bar", 0, "foo.bar", 1);
test_dns_name_equal_skip_one("foo.bar", 1, "foo.bar", 0);
test_dns_name_equal_skip_one("foo.bar", 2, "foo.bar", 0);
test_dns_name_equal_skip_one("foo.bar", 3, "foo.bar", 0);
test_dns_name_equal_skip_one("foo.bar", 0, "bar", 0);
test_dns_name_equal_skip_one("foo.bar", 1, "bar", 1);
test_dns_name_equal_skip_one("foo.bar", 2, "bar", 0);
test_dns_name_equal_skip_one("foo.bar", 3, "bar", 0);
test_dns_name_equal_skip_one("foo.bar", 0, "", 0);
test_dns_name_equal_skip_one("foo.bar", 1, "", 0);
test_dns_name_equal_skip_one("foo.bar", 2, "", 1);
test_dns_name_equal_skip_one("foo.bar", 3, "", 0);
test_dns_name_equal_skip_one("", 0, "", 1);
test_dns_name_equal_skip_one("", 1, "", 0);
test_dns_name_equal_skip_one("", 1, "foo", 0);
test_dns_name_equal_skip_one("", 2, "foo", 0);
}
static void test_dns_name_compare_func(void) {
assert_se(dns_name_compare_func("", "") == 0);
assert_se(dns_name_compare_func("", ".") == 0);
assert_se(dns_name_compare_func(".", "") == 0);
assert_se(dns_name_compare_func("foo", "foo.") == 0);
assert_se(dns_name_compare_func("foo.", "foo") == 0);
assert_se(dns_name_compare_func("foo", "foo") == 0);
assert_se(dns_name_compare_func("foo.", "foo.") == 0);
assert_se(dns_name_compare_func("heise.de", "HEISE.DE.") == 0);
assert_se(dns_name_compare_func("de.", "heise.de") != 0);
}
static void test_dns_name_common_suffix_one(const char *a, const char *b, const char *result) {
const char *c;
assert_se(dns_name_common_suffix(a, b, &c) >= 0);
assert_se(streq(c, result));
}
static void test_dns_name_common_suffix(void) {
test_dns_name_common_suffix_one("", "", "");
test_dns_name_common_suffix_one("foo", "", "");
test_dns_name_common_suffix_one("", "foo", "");
test_dns_name_common_suffix_one("foo", "bar", "");
test_dns_name_common_suffix_one("bar", "foo", "");
test_dns_name_common_suffix_one("foo", "foo", "foo");
test_dns_name_common_suffix_one("quux.foo", "foo", "foo");
test_dns_name_common_suffix_one("foo", "quux.foo", "foo");
test_dns_name_common_suffix_one("this.is.a.short.sentence", "this.is.another.short.sentence", "short.sentence");
test_dns_name_common_suffix_one("FOO.BAR", "tEST.bAR", "BAR");
}
static void test_dns_name_apply_idna_one(const char *s, int expected, const char *result) {
_cleanup_free_ char *buf = NULL;
int r;
r = dns_name_apply_idna(s, &buf);
log_debug("dns_name_apply_idna: \"%s\" → %d/\"%s\" (expected %d/\"%s\")",
s, r, strnull(buf), expected, strnull(result));
assert_se(r == expected);
if (expected == 1)
assert_se(dns_name_equal(buf, result) == 1);
}
static void test_dns_name_apply_idna(void) {
#if defined HAVE_LIBIDN2 || defined HAVE_LIBIDN
const int ret = 1;
#else
const int ret = 0;
#endif
/* IDNA2008 forbids names with hyphens in third and fourth positions
* (https://tools.ietf.org/html/rfc5891#section-4.2.3.1).
* IDNA2003 does not have this restriction
* (https://tools.ietf.org/html/rfc3490#section-5).
* This means that when using libidn we will transform and test more
* labels. If registrars follow IDNA2008 we'll just be performing a
* useless lookup.
*/
#if defined HAVE_LIBIDN
const int ret2 = 1;
#else
const int ret2 = 0;
#endif
test_dns_name_apply_idna_one("", ret, "");
test_dns_name_apply_idna_one("foo", ret, "foo");
test_dns_name_apply_idna_one("foo.", ret, "foo");
test_dns_name_apply_idna_one("foo.bar", ret, "foo.bar");
test_dns_name_apply_idna_one("foo.bar.", ret, "foo.bar");
test_dns_name_apply_idna_one("föö", ret, "xn--f-1gaa");
test_dns_name_apply_idna_one("föö.", ret, "xn--f-1gaa");
test_dns_name_apply_idna_one("föö.bär", ret, "xn--f-1gaa.xn--br-via");
test_dns_name_apply_idna_one("föö.bär.", ret, "xn--f-1gaa.xn--br-via");
test_dns_name_apply_idna_one("xn--f-1gaa.xn--br-via", ret, "xn--f-1gaa.xn--br-via");
test_dns_name_apply_idna_one("_443._tcp.fedoraproject.org", ret2,
"_443._tcp.fedoraproject.org");
test_dns_name_apply_idna_one("_443", ret2, "_443");
test_dns_name_apply_idna_one("gateway", ret, "gateway");
test_dns_name_apply_idna_one("_gateway", ret2, "_gateway");
test_dns_name_apply_idna_one("r3---sn-ab5l6ne7.googlevideo.com", ret2,
ret2 ? "r3---sn-ab5l6ne7.googlevideo.com" : "");
}
static void test_dns_name_is_valid_or_address(void) {
assert_se(dns_name_is_valid_or_address(NULL) == 0);
assert_se(dns_name_is_valid_or_address("") == 0);
assert_se(dns_name_is_valid_or_address("foobar") > 0);
assert_se(dns_name_is_valid_or_address("foobar.com") > 0);
assert_se(dns_name_is_valid_or_address("foobar..com") == 0);
assert_se(dns_name_is_valid_or_address("foobar.com.") > 0);
assert_se(dns_name_is_valid_or_address("127.0.0.1") > 0);
assert_se(dns_name_is_valid_or_address("::") > 0);
assert_se(dns_name_is_valid_or_address("::1") > 0);
}
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
test_dns_label_unescape();
test_dns_label_unescape_suffix();
test_dns_label_escape();
test_dns_name_normalize();
test_dns_name_equal();
test_dns_name_endswith();
test_dns_name_startswith();
test_dns_name_between();
test_dns_name_is_root();
test_dns_name_is_single_label();
test_dns_name_reverse();
test_dns_name_concat();
test_dns_name_is_valid();
test_dns_name_to_wire_format();
test_dns_service_name_is_valid();
test_dns_srv_type_is_valid();
test_dns_service_join();
test_dns_service_split();
test_dns_name_change_suffix();
test_dns_name_suffix();
test_dns_name_count_labels();
test_dns_name_equal_skip();
test_dns_name_compare_func();
test_dns_name_common_suffix();
test_dns_name_apply_idna();
test_dns_name_is_valid_or_address();
return 0;
}
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