/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** 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); } 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, 0); test_dns_label_unescape_suffix_one(".foobar", "foobar", "", 20, 6, -EINVAL); test_dns_label_unescape_suffix_one("foobar.", "", "foobar", 20, 0, 6); 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, NULL, -EINVAL); 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", NULL, -EINVAL); 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", "xxxx", -EINVAL); 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_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("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.", "bar.", 0, "foo.bar"); } 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", 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("\\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(streq_ptr(c, z)); } 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(streq_ptr(joined, t)); } else assert_se(!x && streq_ptr(z, joined)); } 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); } int main(int argc, char *argv[]) { 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_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(); return 0; }