src/test/test-dns-domain.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "alloc-util.h"
   4 #include "dns-domain.h"
   5 #include "macro.h"
   6 #include "string-util.h"
   7 #include "tests.h"
   8
   9 static void test_dns_label_unescape_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
  10         char buffer[buffer_sz];
  11         int r;
  12
  13         r = dns_label_unescape(&what, buffer, buffer_sz);
  14         assert_se(r == ret);
  15
  16         if (r < 0)
  17                 return;
  18
  19         assert_se(streq(buffer, expect));
  20 }
  21
  22 static void test_dns_label_unescape(void) {
  23         test_dns_label_unescape_one("hallo", "hallo", 6, 5);
  24         test_dns_label_unescape_one("hallo", "hallo", 4, -ENOBUFS);
  25         test_dns_label_unescape_one("", "", 10, 0);
  26         test_dns_label_unescape_one("hallo\\.foobar", "hallo.foobar", 20, 12);
  27         test_dns_label_unescape_one("hallo.foobar", "hallo", 10, 5);
  28         test_dns_label_unescape_one("hallo\n.foobar", "hallo", 20, -EINVAL);
  29         test_dns_label_unescape_one("hallo\\", "hallo", 20, -EINVAL);
  30         test_dns_label_unescape_one("hallo\\032 ", "hallo  ", 20, 7);
  31         test_dns_label_unescape_one(".", "", 20, 0);
  32         test_dns_label_unescape_one("..", "", 20, -EINVAL);
  33         test_dns_label_unescape_one(".foobar", "", 20, -EINVAL);
  34         test_dns_label_unescape_one("foobar.", "foobar", 20, 6);
  35         test_dns_label_unescape_one("foobar..", "foobar", 20, -EINVAL);
  36 }
  37
  38 static void test_dns_name_to_wire_format_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
  39         uint8_t buffer[buffer_sz];
  40         int r;
  41
  42         r = dns_name_to_wire_format(what, buffer, buffer_sz, false);
  43         assert_se(r == ret);
  44
  45         if (r < 0)
  46                 return;
  47
  48         assert_se(!memcmp(buffer, expect, r));
  49 }
  50
  51 static void test_dns_name_to_wire_format(void) {
  52         static const char out0[] = { 0 };
  53         static const char out1[] = { 3, 'f', 'o', 'o', 0 };
  54         static const char out2[] = { 5, 'h', 'a', 'l', 'l', 'o', 3, 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
  55         static const char out3[] = { 4, ' ', 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
  56         static const char out4[] = { 9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  57                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  58                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  59                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  60                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  61                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  62                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  63                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  64                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  65                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  66                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  67                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  68                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  69                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  70                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  71                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  72                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  73                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  74                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  75                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  76                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  77                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  78                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  79                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  80                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  81                                      3, 'a', '1', '2', 0 };
  82
  83         test_dns_name_to_wire_format_one("", out0, sizeof(out0), sizeof(out0));
  84
  85         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1), sizeof(out1));
  86         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) + 1, sizeof(out1));
  87         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) - 1, -ENOBUFS);
  88
  89         test_dns_name_to_wire_format_one("hallo.foo.bar", out2, sizeof(out2), sizeof(out2));
  90         test_dns_name_to_wire_format_one("hallo.foo..bar", NULL, 32, -EINVAL);
  91
  92         test_dns_name_to_wire_format_one("\\032foo.bar", out3, sizeof(out3), sizeof(out3));
  93
  94         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);
  95         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));
  96 }
  97
  98 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) {
  99         char buffer[buffer_sz];
 100         const char *label;
 101         int r;
 102
 103         label = what + strlen(what);
 104
 105         r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
 106         assert_se(r == ret1);
 107         if (r >= 0)
 108                 assert_se(streq(buffer, expect1));
 109
 110         r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
 111         assert_se(r == ret2);
 112         if (r >= 0)
 113                 assert_se(streq(buffer, expect2));
 114 }
 115
 116 static void test_dns_label_unescape_suffix(void) {
 117         test_dns_label_unescape_suffix_one("hallo", "hallo", "", 6, 5, 0);
 118         test_dns_label_unescape_suffix_one("hallo", "hallo", "", 4, -ENOBUFS, -ENOBUFS);
 119         test_dns_label_unescape_suffix_one("", "", "", 10, 0, 0);
 120         test_dns_label_unescape_suffix_one("hallo\\.foobar", "hallo.foobar", "", 20, 12, 0);
 121         test_dns_label_unescape_suffix_one("hallo.foobar", "foobar", "hallo", 10, 6, 5);
 122         test_dns_label_unescape_suffix_one("hallo.foobar\n", "foobar", "foobar", 20, -EINVAL, -EINVAL);
 123         test_dns_label_unescape_suffix_one("hallo\\", "hallo", "hallo", 20, -EINVAL, -EINVAL);
 124         test_dns_label_unescape_suffix_one("hallo\\032 ", "hallo  ", "", 20, 7, 0);
 125         test_dns_label_unescape_suffix_one(".", "", "", 20, 0, 0);
 126         test_dns_label_unescape_suffix_one("..", "", "", 20, 0, -EINVAL);
 127         test_dns_label_unescape_suffix_one(".foobar", "foobar", "", 20, 6, -EINVAL);
 128         test_dns_label_unescape_suffix_one("foobar.", "foobar", "", 20, 6, 0);
 129         test_dns_label_unescape_suffix_one("foo\\\\bar", "foo\\bar", "", 20, 7, 0);
 130         test_dns_label_unescape_suffix_one("foo.bar", "bar", "foo", 20, 3, 3);
 131         test_dns_label_unescape_suffix_one("foo..bar", "bar", "", 20, 3, -EINVAL);
 132         test_dns_label_unescape_suffix_one("foo...bar", "bar", "", 20, 3, -EINVAL);
 133         test_dns_label_unescape_suffix_one("foo\\.bar", "foo.bar", "", 20, 7, 0);
 134         test_dns_label_unescape_suffix_one("foo\\\\.bar", "bar", "foo\\", 20, 3, 4);
 135         test_dns_label_unescape_suffix_one("foo\\\\\\.bar", "foo\\.bar", "", 20, 8, 0);
 136 }
 137
 138 static void test_dns_label_escape_one(const char *what, size_t l, const char *expect, int ret) {
 139         _cleanup_free_ char *t = NULL;
 140         int r;
 141
 142         r = dns_label_escape_new(what, l, &t);
 143         assert_se(r == ret);
 144
 145         if (r < 0)
 146                 return;
 147
 148         assert_se(streq_ptr(expect, t));
 149 }
 150
 151 static void test_dns_label_escape(void) {
 152         test_dns_label_escape_one("", 0, NULL, -EINVAL);
 153         test_dns_label_escape_one("hallo", 5, "hallo", 5);
 154         test_dns_label_escape_one("hallo", 6, "hallo\\000", 9);
 155         test_dns_label_escape_one("hallo hallo.foobar,waldi", 24, "hallo\\032hallo\\.foobar\\044waldi", 31);
 156 }
 157
 158 static void test_dns_name_normalize_one(const char *what, const char *expect, int ret) {
 159         _cleanup_free_ char *t = NULL;
 160         int r;
 161
 162         r = dns_name_normalize(what, &t);
 163         assert_se(r == ret);
 164
 165         if (r < 0)
 166                 return;
 167
 168         assert_se(streq_ptr(expect, t));
 169 }
 170
 171 static void test_dns_name_normalize(void) {
 172         test_dns_name_normalize_one("", ".", 0);
 173         test_dns_name_normalize_one("f", "f", 0);
 174         test_dns_name_normalize_one("f.waldi", "f.waldi", 0);
 175         test_dns_name_normalize_one("f \\032.waldi", "f\\032\\032.waldi", 0);
 176         test_dns_name_normalize_one("\\000", "\\000", 0);
 177         test_dns_name_normalize_one("..", NULL, -EINVAL);
 178         test_dns_name_normalize_one(".foobar", NULL, -EINVAL);
 179         test_dns_name_normalize_one("foobar.", "foobar", 0);
 180         test_dns_name_normalize_one(".", ".", 0);
 181 }
 182
 183 static void test_dns_name_equal_one(const char *a, const char *b, int ret) {
 184         int r;
 185
 186         r = dns_name_equal(a, b);
 187         assert_se(r == ret);
 188
 189         r = dns_name_equal(b, a);
 190         assert_se(r == ret);
 191 }
 192
 193 static void test_dns_name_equal(void) {
 194         test_dns_name_equal_one("", "", true);
 195         test_dns_name_equal_one("x", "x", true);
 196         test_dns_name_equal_one("x", "x.", true);
 197         test_dns_name_equal_one("abc.def", "abc.def", true);
 198         test_dns_name_equal_one("abc.def", "ABC.def", true);
 199         test_dns_name_equal_one("abc.def", "CBA.def", false);
 200         test_dns_name_equal_one("", "xxx", false);
 201         test_dns_name_equal_one("ab", "a", false);
 202         test_dns_name_equal_one("\\000", "\\000", true);
 203         test_dns_name_equal_one(".", "", true);
 204         test_dns_name_equal_one(".", ".", true);
 205         test_dns_name_equal_one("..", "..", -EINVAL);
 206 }
 207
 208 static void test_dns_name_between_one(const char *a, const char *b, const char *c, int ret) {
 209         int r;
 210
 211         r = dns_name_between(a, b, c);
 212         assert_se(r == ret);
 213
 214         r = dns_name_between(c, b, a);
 215         if (ret >= 0)
 216                 assert_se(r == 0 || dns_name_equal(a, c) > 0);
 217         else
 218                 assert_se(r == ret);
 219 }
 220
 221 static void test_dns_name_between(void) {
 222         /* see https://tools.ietf.org/html/rfc4034#section-6.1
 223            Note that we use "\033.z.example" in stead of "\001.z.example" as we
 224            consider the latter invalid */
 225         test_dns_name_between_one("example", "a.example", "yljkjljk.a.example", true);
 226         test_dns_name_between_one("a.example", "yljkjljk.a.example", "Z.a.example", true);
 227         test_dns_name_between_one("yljkjljk.a.example", "Z.a.example", "zABC.a.EXAMPLE", true);
 228         test_dns_name_between_one("Z.a.example", "zABC.a.EXAMPLE", "z.example", true);
 229         test_dns_name_between_one("zABC.a.EXAMPLE", "z.example", "\\033.z.example", true);
 230         test_dns_name_between_one("z.example", "\\033.z.example", "*.z.example", true);
 231         test_dns_name_between_one("\\033.z.example", "*.z.example", "\\200.z.example", true);
 232         test_dns_name_between_one("*.z.example", "\\200.z.example", "example", true);
 233         test_dns_name_between_one("\\200.z.example", "example", "a.example", true);
 234
 235         test_dns_name_between_one("example", "a.example", "example", true);
 236         test_dns_name_between_one("example", "example", "example", false);
 237         test_dns_name_between_one("example", "example", "yljkjljk.a.example", false);
 238         test_dns_name_between_one("example", "yljkjljk.a.example", "yljkjljk.a.example", false);
 239         test_dns_name_between_one("hkps.pool.sks-keyservers.net", "_pgpkey-https._tcp.hkps.pool.sks-keyservers.net", "ipv4.pool.sks-keyservers.net", true);
 240 }
 241
 242 static void test_dns_name_endswith_one(const char *a, const char *b, int ret) {
 243         assert_se(dns_name_endswith(a, b) == ret);
 244 }
 245
 246 static void test_dns_name_endswith(void) {
 247         test_dns_name_endswith_one("", "", true);
 248         test_dns_name_endswith_one("", "xxx", false);
 249         test_dns_name_endswith_one("xxx", "", true);
 250         test_dns_name_endswith_one("x", "x", true);
 251         test_dns_name_endswith_one("x", "y", false);
 252         test_dns_name_endswith_one("x.y", "y", true);
 253         test_dns_name_endswith_one("x.y", "Y", true);
 254         test_dns_name_endswith_one("x.y", "x", false);
 255         test_dns_name_endswith_one("x.y.z", "Z", true);
 256         test_dns_name_endswith_one("x.y.z", "y.Z", true);
 257         test_dns_name_endswith_one("x.y.z", "x.y.Z", true);
 258         test_dns_name_endswith_one("x.y.z", "waldo", false);
 259         test_dns_name_endswith_one("x.y.z.u.v.w", "y.z", false);
 260         test_dns_name_endswith_one("x.y.z.u.v.w", "u.v.w", true);
 261         test_dns_name_endswith_one("x.y\001.z", "waldo", -EINVAL);
 262 }
 263
 264 static void test_dns_name_startswith_one(const char *a, const char *b, int ret) {
 265         assert_se(dns_name_startswith(a, b) == ret);
 266 }
 267
 268 static void test_dns_name_startswith(void) {
 269         test_dns_name_startswith_one("", "", true);
 270         test_dns_name_startswith_one("", "xxx", false);
 271         test_dns_name_startswith_one("xxx", "", true);
 272         test_dns_name_startswith_one("x", "x", true);
 273         test_dns_name_startswith_one("x", "y", false);
 274         test_dns_name_startswith_one("x.y", "x.y", true);
 275         test_dns_name_startswith_one("x.y", "y.x", false);
 276         test_dns_name_startswith_one("x.y", "x", true);
 277         test_dns_name_startswith_one("x.y", "X", true);
 278         test_dns_name_startswith_one("x.y", "y", false);
 279         test_dns_name_startswith_one("x.y", "", true);
 280         test_dns_name_startswith_one("x.y", "X", true);
 281 }
 282
 283 static void test_dns_name_is_root(void) {
 284         assert_se(dns_name_is_root(""));
 285         assert_se(dns_name_is_root("."));
 286         assert_se(!dns_name_is_root("xxx"));
 287         assert_se(!dns_name_is_root("xxx."));
 288         assert_se(!dns_name_is_root(".."));
 289 }
 290
 291 static void test_dns_name_is_single_label(void) {
 292         assert_se(!dns_name_is_single_label(""));
 293         assert_se(!dns_name_is_single_label("."));
 294         assert_se(!dns_name_is_single_label(".."));
 295         assert_se(dns_name_is_single_label("x"));
 296         assert_se(dns_name_is_single_label("x."));
 297         assert_se(!dns_name_is_single_label("xx.yy"));
 298 }
 299
 300 static void test_dns_name_reverse_one(const char *address, const char *name) {
 301         _cleanup_free_ char *p = NULL;
 302         union in_addr_union a, b = {};
 303         int familya, familyb;
 304
 305         assert_se(in_addr_from_string_auto(address, &familya, &a) >= 0);
 306         assert_se(dns_name_reverse(familya, &a, &p) >= 0);
 307         assert_se(streq(p, name));
 308         assert_se(dns_name_address(p, &familyb, &b) > 0);
 309         assert_se(familya == familyb);
 310         assert_se(in_addr_equal(familya, &a, &b));
 311 }
 312
 313 static void test_dns_name_reverse(void) {
 314         test_dns_name_reverse_one("47.11.8.15", "15.8.11.47.in-addr.arpa");
 315         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");
 316         test_dns_name_reverse_one("127.0.0.1", "1.0.0.127.in-addr.arpa");
 317         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");
 318 }
 319
 320 static void test_dns_name_concat_one(const char *a, const char *b, int r, const char *result) {
 321         _cleanup_free_ char *p = NULL;
 322
 323         assert_se(dns_name_concat(a, b, &p) == r);
 324         assert_se(streq_ptr(p, result));
 325 }
 326
 327 static void test_dns_name_concat(void) {
 328         test_dns_name_concat_one("", "", 0, ".");
 329         test_dns_name_concat_one(".", "", 0, ".");
 330         test_dns_name_concat_one("", ".", 0, ".");
 331         test_dns_name_concat_one(".", ".", 0, ".");
 332         test_dns_name_concat_one("foo", "bar", 0, "foo.bar");
 333         test_dns_name_concat_one("foo.foo", "bar.bar", 0, "foo.foo.bar.bar");
 334         test_dns_name_concat_one("foo", NULL, 0, "foo");
 335         test_dns_name_concat_one("foo", ".", 0, "foo");
 336         test_dns_name_concat_one("foo.", "bar.", 0, "foo.bar");
 337         test_dns_name_concat_one(NULL, NULL, 0, ".");
 338         test_dns_name_concat_one(NULL, ".", 0, ".");
 339         test_dns_name_concat_one(NULL, "foo", 0, "foo");
 340 }
 341
 342 static void test_dns_name_is_valid_one(const char *s, int ret) {
 343         assert_se(dns_name_is_valid(s) == ret);
 344 }
 345
 346 static void test_dns_name_is_valid(void) {
 347         test_dns_name_is_valid_one("foo", 1);
 348         test_dns_name_is_valid_one("foo.", 1);
 349         test_dns_name_is_valid_one("foo..", 0);
 350         test_dns_name_is_valid_one("Foo", 1);
 351         test_dns_name_is_valid_one("foo.bar", 1);
 352         test_dns_name_is_valid_one("foo.bar.baz", 1);
 353         test_dns_name_is_valid_one("", 1);
 354         test_dns_name_is_valid_one("foo..bar", 0);
 355         test_dns_name_is_valid_one(".foo.bar", 0);
 356         test_dns_name_is_valid_one("foo.bar.", 1);
 357         test_dns_name_is_valid_one("foo.bar..", 0);
 358         test_dns_name_is_valid_one("\\zbar", 0);
 359         test_dns_name_is_valid_one("ä", 1);
 360         test_dns_name_is_valid_one("\n", 0);
 361
 362         /* 256 characters */
 363         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);
 364
 365         /* 255 characters */
 366         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);
 367
 368         /* 254 characters */
 369         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);
 370
 371         /* 253 characters */
 372         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);
 373
 374         /* label of 64 chars length */
 375         test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a123", 0);
 376
 377         /* label of 63 chars length */
 378         test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a12", 1);
 379 }
 380
 381 static void test_dns_service_name_is_valid(void) {
 382         assert_se(dns_service_name_is_valid("Lennart's Compüter"));
 383         assert_se(dns_service_name_is_valid("piff.paff"));
 384
 385         assert_se(!dns_service_name_is_valid(NULL));
 386         assert_se(!dns_service_name_is_valid(""));
 387         assert_se(!dns_service_name_is_valid("foo\nbar"));
 388         assert_se(!dns_service_name_is_valid("foo\201bar"));
 389         assert_se(!dns_service_name_is_valid("this is an overly long string that is certainly longer than 63 characters"));
 390 }
 391
 392 static void test_dns_srv_type_is_valid(void) {
 393
 394         assert_se(dns_srv_type_is_valid("_http._tcp"));
 395         assert_se(dns_srv_type_is_valid("_foo-bar._tcp"));
 396         assert_se(dns_srv_type_is_valid("_w._udp"));
 397         assert_se(dns_srv_type_is_valid("_a800._tcp"));
 398         assert_se(dns_srv_type_is_valid("_a-800._tcp"));
 399
 400         assert_se(!dns_srv_type_is_valid(NULL));
 401         assert_se(!dns_srv_type_is_valid(""));
 402         assert_se(!dns_srv_type_is_valid("x"));
 403         assert_se(!dns_srv_type_is_valid("_foo"));
 404         assert_se(!dns_srv_type_is_valid("_tcp"));
 405         assert_se(!dns_srv_type_is_valid("_"));
 406         assert_se(!dns_srv_type_is_valid("_foo."));
 407         assert_se(!dns_srv_type_is_valid("_föo._tcp"));
 408         assert_se(!dns_srv_type_is_valid("_f\no._tcp"));
 409         assert_se(!dns_srv_type_is_valid("_800._tcp"));
 410         assert_se(!dns_srv_type_is_valid("_-800._tcp"));
 411         assert_se(!dns_srv_type_is_valid("_-foo._tcp"));
 412         assert_se(!dns_srv_type_is_valid("_piep._foo._udp"));
 413 }
 414
 415 static void test_dnssd_srv_type_is_valid(void) {
 416
 417         assert_se(dnssd_srv_type_is_valid("_http._tcp"));
 418         assert_se(dnssd_srv_type_is_valid("_foo-bar._tcp"));
 419         assert_se(dnssd_srv_type_is_valid("_w._udp"));
 420         assert_se(dnssd_srv_type_is_valid("_a800._tcp"));
 421         assert_se(dnssd_srv_type_is_valid("_a-800._tcp"));
 422
 423         assert_se(!dnssd_srv_type_is_valid(NULL));
 424         assert_se(!dnssd_srv_type_is_valid(""));
 425         assert_se(!dnssd_srv_type_is_valid("x"));
 426         assert_se(!dnssd_srv_type_is_valid("_foo"));
 427         assert_se(!dnssd_srv_type_is_valid("_tcp"));
 428         assert_se(!dnssd_srv_type_is_valid("_"));
 429         assert_se(!dnssd_srv_type_is_valid("_foo."));
 430         assert_se(!dnssd_srv_type_is_valid("_föo._tcp"));
 431         assert_se(!dnssd_srv_type_is_valid("_f\no._tcp"));
 432         assert_se(!dnssd_srv_type_is_valid("_800._tcp"));
 433         assert_se(!dnssd_srv_type_is_valid("_-800._tcp"));
 434         assert_se(!dnssd_srv_type_is_valid("_-foo._tcp"));
 435         assert_se(!dnssd_srv_type_is_valid("_piep._foo._udp"));
 436         assert_se(!dnssd_srv_type_is_valid("_foo._unknown"));
 437 }
 438
 439 static void test_dns_service_join_one(const char *a, const char *b, const char *c, int r, const char *d) {
 440         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
 441
 442         assert_se(dns_service_join(a, b, c, &t) == r);
 443         assert_se(streq_ptr(t, d));
 444
 445         if (r < 0)
 446                 return;
 447
 448         assert_se(dns_service_split(t, &x, &y, &z) >= 0);
 449         assert_se(streq_ptr(a, x));
 450         assert_se(streq_ptr(b, y));
 451         assert_se(dns_name_equal(c, z) > 0);
 452 }
 453
 454 static void test_dns_service_join(void) {
 455         test_dns_service_join_one("", "", "", -EINVAL, NULL);
 456         test_dns_service_join_one("", "_http._tcp", "", -EINVAL, NULL);
 457         test_dns_service_join_one("", "_http._tcp", "foo", -EINVAL, NULL);
 458         test_dns_service_join_one("foo", "", "foo", -EINVAL, NULL);
 459         test_dns_service_join_one("foo", "foo", "foo", -EINVAL, NULL);
 460
 461         test_dns_service_join_one("foo", "_http._tcp", "", 0, "foo._http._tcp");
 462         test_dns_service_join_one(NULL, "_http._tcp", "", 0, "_http._tcp");
 463         test_dns_service_join_one("foo", "_http._tcp", "foo", 0, "foo._http._tcp.foo");
 464         test_dns_service_join_one(NULL, "_http._tcp", "foo", 0, "_http._tcp.foo");
 465         test_dns_service_join_one("Lennart's PC", "_pc._tcp", "foo.bar.com", 0, "Lennart\\039s\\032PC._pc._tcp.foo.bar.com");
 466         test_dns_service_join_one(NULL, "_pc._tcp", "foo.bar.com", 0, "_pc._tcp.foo.bar.com");
 467 }
 468
 469 static void test_dns_service_split_one(const char *joined, const char *a, const char *b, const char *c, int r) {
 470         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
 471
 472         assert_se(dns_service_split(joined, &x, &y, &z) == r);
 473         assert_se(streq_ptr(x, a));
 474         assert_se(streq_ptr(y, b));
 475         assert_se(streq_ptr(z, c));
 476
 477         if (r < 0)
 478                 return;
 479
 480         if (y) {
 481                 assert_se(dns_service_join(x, y, z, &t) == 0);
 482                 assert_se(dns_name_equal(joined, t) > 0);
 483         } else
 484                 assert_se(!x && dns_name_equal(z, joined) > 0);
 485 }
 486
 487 static void test_dns_service_split(void) {
 488         test_dns_service_split_one("", NULL, NULL, ".", 0);
 489         test_dns_service_split_one("foo", NULL, NULL, "foo", 0);
 490         test_dns_service_split_one("foo.bar", NULL, NULL, "foo.bar", 0);
 491         test_dns_service_split_one("_foo.bar", NULL, NULL, "_foo.bar", 0);
 492         test_dns_service_split_one("_foo._bar", NULL, "_foo._bar", ".", 0);
 493         test_dns_service_split_one("_meh._foo._bar", "_meh", "_foo._bar", ".", 0);
 494         test_dns_service_split_one("Wuff\\032Wuff._foo._bar.waldo.com", "Wuff Wuff", "_foo._bar", "waldo.com", 0);
 495 }
 496
 497 static void test_dns_name_change_suffix_one(const char *name, const char *old_suffix, const char *new_suffix, int r, const char *result) {
 498         _cleanup_free_ char *s = NULL;
 499
 500         assert_se(dns_name_change_suffix(name, old_suffix, new_suffix, &s) == r);
 501         assert_se(streq_ptr(s, result));
 502 }
 503
 504 static void test_dns_name_change_suffix(void) {
 505         test_dns_name_change_suffix_one("foo.bar", "bar", "waldo", 1, "foo.waldo");
 506         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "foo.bar.waldi.quux", "piff.paff", 1, "piff.paff");
 507         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "bar.waldi.quux", "piff.paff", 1, "foo.piff.paff");
 508         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "waldi.quux", "piff.paff", 1, "foo.bar.piff.paff");
 509         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "quux", "piff.paff", 1, "foo.bar.waldi.piff.paff");
 510         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "", "piff.paff", 1, "foo.bar.waldi.quux.piff.paff");
 511         test_dns_name_change_suffix_one("", "", "piff.paff", 1, "piff.paff");
 512         test_dns_name_change_suffix_one("", "", "", 1, ".");
 513         test_dns_name_change_suffix_one("a", "b", "c", 0, NULL);
 514 }
 515
 516 static void test_dns_name_suffix_one(const char *name, unsigned n_labels, const char *result, int ret) {
 517         const char *p = NULL;
 518
 519         assert_se(ret == dns_name_suffix(name, n_labels, &p));
 520         assert_se(streq_ptr(p, result));
 521 }
 522
 523 static void test_dns_name_suffix(void) {
 524         test_dns_name_suffix_one("foo.bar", 2, "foo.bar", 0);
 525         test_dns_name_suffix_one("foo.bar", 1, "bar", 1);
 526         test_dns_name_suffix_one("foo.bar", 0, "", 2);
 527         test_dns_name_suffix_one("foo.bar", 3, NULL, -EINVAL);
 528         test_dns_name_suffix_one("foo.bar", 4, NULL, -EINVAL);
 529
 530         test_dns_name_suffix_one("bar", 1, "bar", 0);
 531         test_dns_name_suffix_one("bar", 0, "", 1);
 532         test_dns_name_suffix_one("bar", 2, NULL, -EINVAL);
 533         test_dns_name_suffix_one("bar", 3, NULL, -EINVAL);
 534
 535         test_dns_name_suffix_one("", 0, "", 0);
 536         test_dns_name_suffix_one("", 1, NULL, -EINVAL);
 537         test_dns_name_suffix_one("", 2, NULL, -EINVAL);
 538 }
 539
 540 static void test_dns_name_count_labels_one(const char *name, int n) {
 541         assert_se(dns_name_count_labels(name) == n);
 542 }
 543
 544 static void test_dns_name_count_labels(void) {
 545         test_dns_name_count_labels_one("foo.bar.quux.", 3);
 546         test_dns_name_count_labels_one("foo.bar.quux", 3);
 547         test_dns_name_count_labels_one("foo.bar.", 2);
 548         test_dns_name_count_labels_one("foo.bar", 2);
 549         test_dns_name_count_labels_one("foo.", 1);
 550         test_dns_name_count_labels_one("foo", 1);
 551         test_dns_name_count_labels_one("", 0);
 552         test_dns_name_count_labels_one(".", 0);
 553         test_dns_name_count_labels_one("..", -EINVAL);
 554 }
 555
 556 static void test_dns_name_equal_skip_one(const char *a, unsigned n_labels, const char *b, int ret) {
 557         assert_se(dns_name_equal_skip(a, n_labels, b) == ret);
 558 }
 559
 560 static void test_dns_name_equal_skip(void) {
 561         test_dns_name_equal_skip_one("foo", 0, "bar", 0);
 562         test_dns_name_equal_skip_one("foo", 0, "foo", 1);
 563         test_dns_name_equal_skip_one("foo", 1, "foo", 0);
 564         test_dns_name_equal_skip_one("foo", 2, "foo", 0);
 565
 566         test_dns_name_equal_skip_one("foo.bar", 0, "foo.bar", 1);
 567         test_dns_name_equal_skip_one("foo.bar", 1, "foo.bar", 0);
 568         test_dns_name_equal_skip_one("foo.bar", 2, "foo.bar", 0);
 569         test_dns_name_equal_skip_one("foo.bar", 3, "foo.bar", 0);
 570
 571         test_dns_name_equal_skip_one("foo.bar", 0, "bar", 0);
 572         test_dns_name_equal_skip_one("foo.bar", 1, "bar", 1);
 573         test_dns_name_equal_skip_one("foo.bar", 2, "bar", 0);
 574         test_dns_name_equal_skip_one("foo.bar", 3, "bar", 0);
 575
 576         test_dns_name_equal_skip_one("foo.bar", 0, "", 0);
 577         test_dns_name_equal_skip_one("foo.bar", 1, "", 0);
 578         test_dns_name_equal_skip_one("foo.bar", 2, "", 1);
 579         test_dns_name_equal_skip_one("foo.bar", 3, "", 0);
 580
 581         test_dns_name_equal_skip_one("", 0, "", 1);
 582         test_dns_name_equal_skip_one("", 1, "", 0);
 583         test_dns_name_equal_skip_one("", 1, "foo", 0);
 584         test_dns_name_equal_skip_one("", 2, "foo", 0);
 585 }
 586
 587 static void test_dns_name_compare_func(void) {
 588         assert_se(dns_name_compare_func("", "") == 0);
 589         assert_se(dns_name_compare_func("", ".") == 0);
 590         assert_se(dns_name_compare_func(".", "") == 0);
 591         assert_se(dns_name_compare_func("foo", "foo.") == 0);
 592         assert_se(dns_name_compare_func("foo.", "foo") == 0);
 593         assert_se(dns_name_compare_func("foo", "foo") == 0);
 594         assert_se(dns_name_compare_func("foo.", "foo.") == 0);
 595         assert_se(dns_name_compare_func("heise.de", "HEISE.DE.") == 0);
 596
 597         assert_se(dns_name_compare_func("de.", "heise.de") != 0);
 598 }
 599
 600 static void test_dns_name_common_suffix_one(const char *a, const char *b, const char *result) {
 601         const char *c;
 602
 603         assert_se(dns_name_common_suffix(a, b, &c) >= 0);
 604         assert_se(streq(c, result));
 605 }
 606
 607 static void test_dns_name_common_suffix(void) {
 608         test_dns_name_common_suffix_one("", "", "");
 609         test_dns_name_common_suffix_one("foo", "", "");
 610         test_dns_name_common_suffix_one("", "foo", "");
 611         test_dns_name_common_suffix_one("foo", "bar", "");
 612         test_dns_name_common_suffix_one("bar", "foo", "");
 613         test_dns_name_common_suffix_one("foo", "foo", "foo");
 614         test_dns_name_common_suffix_one("quux.foo", "foo", "foo");
 615         test_dns_name_common_suffix_one("foo", "quux.foo", "foo");
 616         test_dns_name_common_suffix_one("this.is.a.short.sentence", "this.is.another.short.sentence", "short.sentence");
 617         test_dns_name_common_suffix_one("FOO.BAR", "tEST.bAR", "BAR");
 618 }
 619
 620 static void test_dns_name_apply_idna_one(const char *s, int expected, const char *result) {
 621         _cleanup_free_ char *buf = NULL;
 622         int r;
 623
 624         r = dns_name_apply_idna(s, &buf);
 625         log_debug("dns_name_apply_idna: \"%s\" → %d/\"%s\" (expected %d/\"%s\")",
 626                   s, r, strnull(buf), expected, strnull(result));
 627
 628         /* Different libidn2 versions are more and less accepting
 629          * of underscore-prefixed names. So let's list the lowest
 630          * expected return value. */
 631         assert_se(r >= expected);
 632         if (expected == 1)
 633                 assert_se(dns_name_equal(buf, result) == 1);
 634 }
 635
 636 static void test_dns_name_apply_idna(void) {
 637 #if HAVE_LIBIDN2 || HAVE_LIBIDN
 638         const int ret = 1;
 639 #else
 640         const int ret = 0;
 641 #endif
 642
 643         /* IDNA2008 forbids names with hyphens in third and fourth positions
 644          * (https://tools.ietf.org/html/rfc5891#section-4.2.3.1).
 645          * IDNA2003 does not have this restriction
 646          * (https://tools.ietf.org/html/rfc3490#section-5).
 647          * This means that when using libidn we will transform and test more
 648          * labels. If registrars follow IDNA2008 we'll just be performing a
 649          * useless lookup.
 650          */
 651 #if HAVE_LIBIDN
 652         const int ret2 = 1;
 653 #else
 654         const int ret2 = 0;
 655 #endif
 656
 657         test_dns_name_apply_idna_one("", ret, "");
 658         test_dns_name_apply_idna_one("foo", ret, "foo");
 659         test_dns_name_apply_idna_one("foo.", ret, "foo");
 660         test_dns_name_apply_idna_one("foo.bar", ret, "foo.bar");
 661         test_dns_name_apply_idna_one("foo.bar.", ret, "foo.bar");
 662         test_dns_name_apply_idna_one("föö", ret, "xn--f-1gaa");
 663         test_dns_name_apply_idna_one("föö.", ret, "xn--f-1gaa");
 664         test_dns_name_apply_idna_one("föö.bär", ret, "xn--f-1gaa.xn--br-via");
 665         test_dns_name_apply_idna_one("föö.bär.", ret, "xn--f-1gaa.xn--br-via");
 666         test_dns_name_apply_idna_one("xn--f-1gaa.xn--br-via", ret, "xn--f-1gaa.xn--br-via");
 667
 668         test_dns_name_apply_idna_one("_443._tcp.fedoraproject.org", ret2,
 669                                      "_443._tcp.fedoraproject.org");
 670         test_dns_name_apply_idna_one("_443", ret2, "_443");
 671         test_dns_name_apply_idna_one("gateway", ret, "gateway");
 672         test_dns_name_apply_idna_one("_gateway", ret2, "_gateway");
 673
 674         test_dns_name_apply_idna_one("r3---sn-ab5l6ne7.googlevideo.com", ret2,
 675                                      ret2 ? "r3---sn-ab5l6ne7.googlevideo.com" : "");
 676 }
 677
 678 static void test_dns_name_is_valid_or_address(void) {
 679         assert_se(dns_name_is_valid_or_address(NULL) == 0);
 680         assert_se(dns_name_is_valid_or_address("") == 0);
 681         assert_se(dns_name_is_valid_or_address("foobar") > 0);
 682         assert_se(dns_name_is_valid_or_address("foobar.com") > 0);
 683         assert_se(dns_name_is_valid_or_address("foobar..com") == 0);
 684         assert_se(dns_name_is_valid_or_address("foobar.com.") > 0);
 685         assert_se(dns_name_is_valid_or_address("127.0.0.1") > 0);
 686         assert_se(dns_name_is_valid_or_address("::") > 0);
 687         assert_se(dns_name_is_valid_or_address("::1") > 0);
 688 }
 689
 690 int main(int argc, char *argv[]) {
 691         test_setup_logging(LOG_DEBUG);
 692
 693         test_dns_label_unescape();
 694         test_dns_label_unescape_suffix();
 695         test_dns_label_escape();
 696         test_dns_name_normalize();
 697         test_dns_name_equal();
 698         test_dns_name_endswith();
 699         test_dns_name_startswith();
 700         test_dns_name_between();
 701         test_dns_name_is_root();
 702         test_dns_name_is_single_label();
 703         test_dns_name_reverse();
 704         test_dns_name_concat();
 705         test_dns_name_is_valid();
 706         test_dns_name_to_wire_format();
 707         test_dns_service_name_is_valid();
 708         test_dns_srv_type_is_valid();
 709         test_dnssd_srv_type_is_valid();
 710         test_dns_service_join();
 711         test_dns_service_split();
 712         test_dns_name_change_suffix();
 713         test_dns_name_suffix();
 714         test_dns_name_count_labels();
 715         test_dns_name_equal_skip();
 716         test_dns_name_compare_func();
 717         test_dns_name_common_suffix();
 718         test_dns_name_apply_idna();
 719         test_dns_name_is_valid_or_address();
 720
 721         return 0;
 722 }