src/test/test-dns-domain.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3  ***/
   4
   5 #include "alloc-util.h"
   6 #include "dns-domain.h"
   7 #include "macro.h"
   8 #include "string-util.h"
   9
  10 static void test_dns_label_unescape_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
  11         char buffer[buffer_sz];
  12         int r;
  13
  14         r = dns_label_unescape(&what, buffer, buffer_sz);
  15         assert_se(r == ret);
  16
  17         if (r < 0)
  18                 return;
  19
  20         assert_se(streq(buffer, expect));
  21 }
  22
  23 static void test_dns_label_unescape(void) {
  24         test_dns_label_unescape_one("hallo", "hallo", 6, 5);
  25         test_dns_label_unescape_one("hallo", "hallo", 4, -ENOBUFS);
  26         test_dns_label_unescape_one("", "", 10, 0);
  27         test_dns_label_unescape_one("hallo\\.foobar", "hallo.foobar", 20, 12);
  28         test_dns_label_unescape_one("hallo.foobar", "hallo", 10, 5);
  29         test_dns_label_unescape_one("hallo\n.foobar", "hallo", 20, -EINVAL);
  30         test_dns_label_unescape_one("hallo\\", "hallo", 20, -EINVAL);
  31         test_dns_label_unescape_one("hallo\\032 ", "hallo  ", 20, 7);
  32         test_dns_label_unescape_one(".", "", 20, 0);
  33         test_dns_label_unescape_one("..", "", 20, -EINVAL);
  34         test_dns_label_unescape_one(".foobar", "", 20, -EINVAL);
  35         test_dns_label_unescape_one("foobar.", "foobar", 20, 6);
  36         test_dns_label_unescape_one("foobar..", "foobar", 20, -EINVAL);
  37 }
  38
  39 static void test_dns_name_to_wire_format_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
  40         uint8_t buffer[buffer_sz];
  41         int r;
  42
  43         r = dns_name_to_wire_format(what, buffer, buffer_sz, false);
  44         assert_se(r == ret);
  45
  46         if (r < 0)
  47                 return;
  48
  49         assert_se(!memcmp(buffer, expect, r));
  50 }
  51
  52 static void test_dns_name_to_wire_format(void) {
  53         static const char out0[] = { 0 };
  54         static const char out1[] = { 3, 'f', 'o', 'o', 0 };
  55         static const char out2[] = { 5, 'h', 'a', 'l', 'l', 'o', 3, 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
  56         static const char out3[] = { 4, ' ', 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
  57         static const char out4[] = { 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                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  82                                      3, 'a', '1', '2', 0 };
  83
  84         test_dns_name_to_wire_format_one("", out0, sizeof(out0), sizeof(out0));
  85
  86         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1), sizeof(out1));
  87         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) + 1, sizeof(out1));
  88         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) - 1, -ENOBUFS);
  89
  90         test_dns_name_to_wire_format_one("hallo.foo.bar", out2, sizeof(out2), sizeof(out2));
  91         test_dns_name_to_wire_format_one("hallo.foo..bar", NULL, 32, -EINVAL);
  92
  93         test_dns_name_to_wire_format_one("\\032foo.bar", out3, sizeof(out3), sizeof(out3));
  94
  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.a123", NULL, 500, -EINVAL);
  96         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));
  97 }
  98
  99 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) {
 100         char buffer[buffer_sz];
 101         const char *label;
 102         int r;
 103
 104         label = what + strlen(what);
 105
 106         r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
 107         assert_se(r == ret1);
 108         if (r >= 0)
 109                 assert_se(streq(buffer, expect1));
 110
 111         r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
 112         assert_se(r == ret2);
 113         if (r >= 0)
 114                 assert_se(streq(buffer, expect2));
 115 }
 116
 117 static void test_dns_label_unescape_suffix(void) {
 118         test_dns_label_unescape_suffix_one("hallo", "hallo", "", 6, 5, 0);
 119         test_dns_label_unescape_suffix_one("hallo", "hallo", "", 4, -ENOBUFS, -ENOBUFS);
 120         test_dns_label_unescape_suffix_one("", "", "", 10, 0, 0);
 121         test_dns_label_unescape_suffix_one("hallo\\.foobar", "hallo.foobar", "", 20, 12, 0);
 122         test_dns_label_unescape_suffix_one("hallo.foobar", "foobar", "hallo", 10, 6, 5);
 123         test_dns_label_unescape_suffix_one("hallo.foobar\n", "foobar", "foobar", 20, -EINVAL, -EINVAL);
 124         test_dns_label_unescape_suffix_one("hallo\\", "hallo", "hallo", 20, -EINVAL, -EINVAL);
 125         test_dns_label_unescape_suffix_one("hallo\\032 ", "hallo  ", "", 20, 7, 0);
 126         test_dns_label_unescape_suffix_one(".", "", "", 20, 0, 0);
 127         test_dns_label_unescape_suffix_one("..", "", "", 20, 0, -EINVAL);
 128         test_dns_label_unescape_suffix_one(".foobar", "foobar", "", 20, 6, -EINVAL);
 129         test_dns_label_unescape_suffix_one("foobar.", "foobar", "", 20, 6, 0);
 130         test_dns_label_unescape_suffix_one("foo\\\\bar", "foo\\bar", "", 20, 7, 0);
 131         test_dns_label_unescape_suffix_one("foo.bar", "bar", "foo", 20, 3, 3);
 132         test_dns_label_unescape_suffix_one("foo..bar", "bar", "", 20, 3, -EINVAL);
 133         test_dns_label_unescape_suffix_one("foo...bar", "bar", "", 20, 3, -EINVAL);
 134         test_dns_label_unescape_suffix_one("foo\\.bar", "foo.bar", "", 20, 7, 0);
 135         test_dns_label_unescape_suffix_one("foo\\\\.bar", "bar", "foo\\", 20, 3, 4);
 136         test_dns_label_unescape_suffix_one("foo\\\\\\.bar", "foo\\.bar", "", 20, 8, 0);
 137 }
 138
 139 static void test_dns_label_escape_one(const char *what, size_t l, const char *expect, int ret) {
 140         _cleanup_free_ char *t = NULL;
 141         int r;
 142
 143         r = dns_label_escape_new(what, l, &t);
 144         assert_se(r == ret);
 145
 146         if (r < 0)
 147                 return;
 148
 149         assert_se(streq_ptr(expect, t));
 150 }
 151
 152 static void test_dns_label_escape(void) {
 153         test_dns_label_escape_one("", 0, NULL, -EINVAL);
 154         test_dns_label_escape_one("hallo", 5, "hallo", 5);
 155         test_dns_label_escape_one("hallo", 6, "hallo\\000", 9);
 156         test_dns_label_escape_one("hallo hallo.foobar,waldi", 24, "hallo\\032hallo\\.foobar\\044waldi", 31);
 157 }
 158
 159 static void test_dns_name_normalize_one(const char *what, const char *expect, int ret) {
 160         _cleanup_free_ char *t = NULL;
 161         int r;
 162
 163         r = dns_name_normalize(what, &t);
 164         assert_se(r == ret);
 165
 166         if (r < 0)
 167                 return;
 168
 169         assert_se(streq_ptr(expect, t));
 170 }
 171
 172 static void test_dns_name_normalize(void) {
 173         test_dns_name_normalize_one("", ".", 0);
 174         test_dns_name_normalize_one("f", "f", 0);
 175         test_dns_name_normalize_one("f.waldi", "f.waldi", 0);
 176         test_dns_name_normalize_one("f \\032.waldi", "f\\032\\032.waldi", 0);
 177         test_dns_name_normalize_one("\\000", "\\000", 0);
 178         test_dns_name_normalize_one("..", NULL, -EINVAL);
 179         test_dns_name_normalize_one(".foobar", NULL, -EINVAL);
 180         test_dns_name_normalize_one("foobar.", "foobar", 0);
 181         test_dns_name_normalize_one(".", ".", 0);
 182 }
 183
 184 static void test_dns_name_equal_one(const char *a, const char *b, int ret) {
 185         int r;
 186
 187         r = dns_name_equal(a, b);
 188         assert_se(r == ret);
 189
 190         r = dns_name_equal(b, a);
 191         assert_se(r == ret);
 192 }
 193
 194 static void test_dns_name_equal(void) {
 195         test_dns_name_equal_one("", "", true);
 196         test_dns_name_equal_one("x", "x", true);
 197         test_dns_name_equal_one("x", "x.", true);
 198         test_dns_name_equal_one("abc.def", "abc.def", true);
 199         test_dns_name_equal_one("abc.def", "ABC.def", true);
 200         test_dns_name_equal_one("abc.def", "CBA.def", false);
 201         test_dns_name_equal_one("", "xxx", false);
 202         test_dns_name_equal_one("ab", "a", false);
 203         test_dns_name_equal_one("\\000", "\\000", true);
 204         test_dns_name_equal_one(".", "", true);
 205         test_dns_name_equal_one(".", ".", true);
 206         test_dns_name_equal_one("..", "..", -EINVAL);
 207 }
 208
 209 static void test_dns_name_between_one(const char *a, const char *b, const char *c, int ret) {
 210         int r;
 211
 212         r = dns_name_between(a, b, c);
 213         assert_se(r == ret);
 214
 215         r = dns_name_between(c, b, a);
 216         if (ret >= 0)
 217                 assert_se(r == 0 || dns_name_equal(a, c) > 0);
 218         else
 219                 assert_se(r == ret);
 220 }
 221
 222 static void test_dns_name_between(void) {
 223         /* see https://tools.ietf.org/html/rfc4034#section-6.1
 224            Note that we use "\033.z.example" in stead of "\001.z.example" as we
 225            consider the latter invalid */
 226         test_dns_name_between_one("example", "a.example", "yljkjljk.a.example", true);
 227         test_dns_name_between_one("a.example", "yljkjljk.a.example", "Z.a.example", true);
 228         test_dns_name_between_one("yljkjljk.a.example", "Z.a.example", "zABC.a.EXAMPLE", true);
 229         test_dns_name_between_one("Z.a.example", "zABC.a.EXAMPLE", "z.example", true);
 230         test_dns_name_between_one("zABC.a.EXAMPLE", "z.example", "\\033.z.example", true);
 231         test_dns_name_between_one("z.example", "\\033.z.example", "*.z.example", true);
 232         test_dns_name_between_one("\\033.z.example", "*.z.example", "\\200.z.example", true);
 233         test_dns_name_between_one("*.z.example", "\\200.z.example", "example", true);
 234         test_dns_name_between_one("\\200.z.example", "example", "a.example", true);
 235
 236         test_dns_name_between_one("example", "a.example", "example", true);
 237         test_dns_name_between_one("example", "example", "example", false);
 238         test_dns_name_between_one("example", "example", "yljkjljk.a.example", false);
 239         test_dns_name_between_one("example", "yljkjljk.a.example", "yljkjljk.a.example", false);
 240         test_dns_name_between_one("hkps.pool.sks-keyservers.net", "_pgpkey-https._tcp.hkps.pool.sks-keyservers.net", "ipv4.pool.sks-keyservers.net", true);
 241 }
 242
 243 static void test_dns_name_endswith_one(const char *a, const char *b, int ret) {
 244         assert_se(dns_name_endswith(a, b) == ret);
 245 }
 246
 247 static void test_dns_name_endswith(void) {
 248         test_dns_name_endswith_one("", "", true);
 249         test_dns_name_endswith_one("", "xxx", false);
 250         test_dns_name_endswith_one("xxx", "", true);
 251         test_dns_name_endswith_one("x", "x", true);
 252         test_dns_name_endswith_one("x", "y", false);
 253         test_dns_name_endswith_one("x.y", "y", true);
 254         test_dns_name_endswith_one("x.y", "Y", true);
 255         test_dns_name_endswith_one("x.y", "x", false);
 256         test_dns_name_endswith_one("x.y.z", "Z", true);
 257         test_dns_name_endswith_one("x.y.z", "y.Z", true);
 258         test_dns_name_endswith_one("x.y.z", "x.y.Z", true);
 259         test_dns_name_endswith_one("x.y.z", "waldo", false);
 260         test_dns_name_endswith_one("x.y.z.u.v.w", "y.z", false);
 261         test_dns_name_endswith_one("x.y.z.u.v.w", "u.v.w", true);
 262         test_dns_name_endswith_one("x.y\001.z", "waldo", -EINVAL);
 263 }
 264
 265 static void test_dns_name_startswith_one(const char *a, const char *b, int ret) {
 266         assert_se(dns_name_startswith(a, b) == ret);
 267 }
 268
 269 static void test_dns_name_startswith(void) {
 270         test_dns_name_startswith_one("", "", true);
 271         test_dns_name_startswith_one("", "xxx", false);
 272         test_dns_name_startswith_one("xxx", "", true);
 273         test_dns_name_startswith_one("x", "x", true);
 274         test_dns_name_startswith_one("x", "y", false);
 275         test_dns_name_startswith_one("x.y", "x.y", true);
 276         test_dns_name_startswith_one("x.y", "y.x", false);
 277         test_dns_name_startswith_one("x.y", "x", true);
 278         test_dns_name_startswith_one("x.y", "X", true);
 279         test_dns_name_startswith_one("x.y", "y", false);
 280         test_dns_name_startswith_one("x.y", "", true);
 281         test_dns_name_startswith_one("x.y", "X", true);
 282 }
 283
 284 static void test_dns_name_is_root(void) {
 285         assert_se(dns_name_is_root(""));
 286         assert_se(dns_name_is_root("."));
 287         assert_se(!dns_name_is_root("xxx"));
 288         assert_se(!dns_name_is_root("xxx."));
 289         assert_se(!dns_name_is_root(".."));
 290 }
 291
 292 static void test_dns_name_is_single_label(void) {
 293         assert_se(!dns_name_is_single_label(""));
 294         assert_se(!dns_name_is_single_label("."));
 295         assert_se(!dns_name_is_single_label(".."));
 296         assert_se(dns_name_is_single_label("x"));
 297         assert_se(dns_name_is_single_label("x."));
 298         assert_se(!dns_name_is_single_label("xx.yy"));
 299 }
 300
 301 static void test_dns_name_reverse_one(const char *address, const char *name) {
 302         _cleanup_free_ char *p = NULL;
 303         union in_addr_union a, b = {};
 304         int familya, familyb;
 305
 306         assert_se(in_addr_from_string_auto(address, &familya, &a) >= 0);
 307         assert_se(dns_name_reverse(familya, &a, &p) >= 0);
 308         assert_se(streq(p, name));
 309         assert_se(dns_name_address(p, &familyb, &b) > 0);
 310         assert_se(familya == familyb);
 311         assert_se(in_addr_equal(familya, &a, &b));
 312 }
 313
 314 static void test_dns_name_reverse(void) {
 315         test_dns_name_reverse_one("47.11.8.15", "15.8.11.47.in-addr.arpa");
 316         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");
 317         test_dns_name_reverse_one("127.0.0.1", "1.0.0.127.in-addr.arpa");
 318         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");
 319 }
 320
 321 static void test_dns_name_concat_one(const char *a, const char *b, int r, const char *result) {
 322         _cleanup_free_ char *p = NULL;
 323
 324         assert_se(dns_name_concat(a, b, &p) == r);
 325         assert_se(streq_ptr(p, result));
 326 }
 327
 328 static void test_dns_name_concat(void) {
 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(".", ".", 0, ".");
 333         test_dns_name_concat_one("foo", "bar", 0, "foo.bar");
 334         test_dns_name_concat_one("foo.foo", "bar.bar", 0, "foo.foo.bar.bar");
 335         test_dns_name_concat_one("foo", NULL, 0, "foo");
 336         test_dns_name_concat_one("foo", ".", 0, "foo");
 337         test_dns_name_concat_one("foo.", "bar.", 0, "foo.bar");
 338         test_dns_name_concat_one(NULL, NULL, 0, ".");
 339         test_dns_name_concat_one(NULL, ".", 0, ".");
 340         test_dns_name_concat_one(NULL, "foo", 0, "foo");
 341 }
 342
 343 static void test_dns_name_is_valid_one(const char *s, int ret) {
 344         assert_se(dns_name_is_valid(s) == ret);
 345 }
 346
 347 static void test_dns_name_is_valid(void) {
 348         test_dns_name_is_valid_one("foo", 1);
 349         test_dns_name_is_valid_one("foo.", 1);
 350         test_dns_name_is_valid_one("foo..", 0);
 351         test_dns_name_is_valid_one("Foo", 1);
 352         test_dns_name_is_valid_one("foo.bar", 1);
 353         test_dns_name_is_valid_one("foo.bar.baz", 1);
 354         test_dns_name_is_valid_one("", 1);
 355         test_dns_name_is_valid_one("foo..bar", 0);
 356         test_dns_name_is_valid_one(".foo.bar", 0);
 357         test_dns_name_is_valid_one("foo.bar.", 1);
 358         test_dns_name_is_valid_one("foo.bar..", 0);
 359         test_dns_name_is_valid_one("\\zbar", 0);
 360         test_dns_name_is_valid_one("ä", 1);
 361         test_dns_name_is_valid_one("\n", 0);
 362
 363         /* 256 characters */
 364         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);
 365
 366         /* 255 characters */
 367         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);
 368
 369         /* 254 characters */
 370         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);
 371
 372         /* 253 characters */
 373         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);
 374
 375         /* label of 64 chars length */
 376         test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a123", 0);
 377
 378         /* label of 63 chars length */
 379         test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a12", 1);
 380 }
 381
 382 static void test_dns_service_name_is_valid(void) {
 383         assert_se(dns_service_name_is_valid("Lennart's Compüter"));
 384         assert_se(dns_service_name_is_valid("piff.paff"));
 385
 386         assert_se(!dns_service_name_is_valid(NULL));
 387         assert_se(!dns_service_name_is_valid(""));
 388         assert_se(!dns_service_name_is_valid("foo\nbar"));
 389         assert_se(!dns_service_name_is_valid("foo\201bar"));
 390         assert_se(!dns_service_name_is_valid("this is an overly long string that is certainly longer than 63 characters"));
 391 }
 392
 393 static void test_dns_srv_type_is_valid(void) {
 394
 395         assert_se(dns_srv_type_is_valid("_http._tcp"));
 396         assert_se(dns_srv_type_is_valid("_foo-bar._tcp"));
 397         assert_se(dns_srv_type_is_valid("_w._udp"));
 398         assert_se(dns_srv_type_is_valid("_a800._tcp"));
 399         assert_se(dns_srv_type_is_valid("_a-800._tcp"));
 400
 401         assert_se(!dns_srv_type_is_valid(NULL));
 402         assert_se(!dns_srv_type_is_valid(""));
 403         assert_se(!dns_srv_type_is_valid("x"));
 404         assert_se(!dns_srv_type_is_valid("_foo"));
 405         assert_se(!dns_srv_type_is_valid("_tcp"));
 406         assert_se(!dns_srv_type_is_valid("_"));
 407         assert_se(!dns_srv_type_is_valid("_foo."));
 408         assert_se(!dns_srv_type_is_valid("_föo._tcp"));
 409         assert_se(!dns_srv_type_is_valid("_f\no._tcp"));
 410         assert_se(!dns_srv_type_is_valid("_800._tcp"));
 411         assert_se(!dns_srv_type_is_valid("_-800._tcp"));
 412         assert_se(!dns_srv_type_is_valid("_-foo._tcp"));
 413         assert_se(!dns_srv_type_is_valid("_piep._foo._udp"));
 414 }
 415
 416 static void test_dnssd_srv_type_is_valid(void) {
 417
 418         assert_se(dnssd_srv_type_is_valid("_http._tcp"));
 419         assert_se(dnssd_srv_type_is_valid("_foo-bar._tcp"));
 420         assert_se(dnssd_srv_type_is_valid("_w._udp"));
 421         assert_se(dnssd_srv_type_is_valid("_a800._tcp"));
 422         assert_se(dnssd_srv_type_is_valid("_a-800._tcp"));
 423
 424         assert_se(!dnssd_srv_type_is_valid(NULL));
 425         assert_se(!dnssd_srv_type_is_valid(""));
 426         assert_se(!dnssd_srv_type_is_valid("x"));
 427         assert_se(!dnssd_srv_type_is_valid("_foo"));
 428         assert_se(!dnssd_srv_type_is_valid("_tcp"));
 429         assert_se(!dnssd_srv_type_is_valid("_"));
 430         assert_se(!dnssd_srv_type_is_valid("_foo."));
 431         assert_se(!dnssd_srv_type_is_valid("_föo._tcp"));
 432         assert_se(!dnssd_srv_type_is_valid("_f\no._tcp"));
 433         assert_se(!dnssd_srv_type_is_valid("_800._tcp"));
 434         assert_se(!dnssd_srv_type_is_valid("_-800._tcp"));
 435         assert_se(!dnssd_srv_type_is_valid("_-foo._tcp"));
 436         assert_se(!dnssd_srv_type_is_valid("_piep._foo._udp"));
 437         assert_se(!dnssd_srv_type_is_valid("_foo._unknown"));
 438 }
 439
 440 static void test_dns_service_join_one(const char *a, const char *b, const char *c, int r, const char *d) {
 441         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
 442
 443         assert_se(dns_service_join(a, b, c, &t) == r);
 444         assert_se(streq_ptr(t, d));
 445
 446         if (r < 0)
 447                 return;
 448
 449         assert_se(dns_service_split(t, &x, &y, &z) >= 0);
 450         assert_se(streq_ptr(a, x));
 451         assert_se(streq_ptr(b, y));
 452         assert_se(dns_name_equal(c, z) > 0);
 453 }
 454
 455 static void test_dns_service_join(void) {
 456         test_dns_service_join_one("", "", "", -EINVAL, NULL);
 457         test_dns_service_join_one("", "_http._tcp", "", -EINVAL, NULL);
 458         test_dns_service_join_one("", "_http._tcp", "foo", -EINVAL, NULL);
 459         test_dns_service_join_one("foo", "", "foo", -EINVAL, NULL);
 460         test_dns_service_join_one("foo", "foo", "foo", -EINVAL, NULL);
 461
 462         test_dns_service_join_one("foo", "_http._tcp", "", 0, "foo._http._tcp");
 463         test_dns_service_join_one(NULL, "_http._tcp", "", 0, "_http._tcp");
 464         test_dns_service_join_one("foo", "_http._tcp", "foo", 0, "foo._http._tcp.foo");
 465         test_dns_service_join_one(NULL, "_http._tcp", "foo", 0, "_http._tcp.foo");
 466         test_dns_service_join_one("Lennart's PC", "_pc._tcp", "foo.bar.com", 0, "Lennart\\039s\\032PC._pc._tcp.foo.bar.com");
 467         test_dns_service_join_one(NULL, "_pc._tcp", "foo.bar.com", 0, "_pc._tcp.foo.bar.com");
 468 }
 469
 470 static void test_dns_service_split_one(const char *joined, const char *a, const char *b, const char *c, int r) {
 471         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
 472
 473         assert_se(dns_service_split(joined, &x, &y, &z) == r);
 474         assert_se(streq_ptr(x, a));
 475         assert_se(streq_ptr(y, b));
 476         assert_se(streq_ptr(z, c));
 477
 478         if (r < 0)
 479                 return;
 480
 481         if (y) {
 482                 assert_se(dns_service_join(x, y, z, &t) == 0);
 483                 assert_se(dns_name_equal(joined, t) > 0);
 484         } else
 485                 assert_se(!x && dns_name_equal(z, joined) > 0);
 486 }
 487
 488 static void test_dns_service_split(void) {
 489         test_dns_service_split_one("", NULL, NULL, ".", 0);
 490         test_dns_service_split_one("foo", NULL, NULL, "foo", 0);
 491         test_dns_service_split_one("foo.bar", NULL, NULL, "foo.bar", 0);
 492         test_dns_service_split_one("_foo.bar", NULL, NULL, "_foo.bar", 0);
 493         test_dns_service_split_one("_foo._bar", NULL, "_foo._bar", ".", 0);
 494         test_dns_service_split_one("_meh._foo._bar", "_meh", "_foo._bar", ".", 0);
 495         test_dns_service_split_one("Wuff\\032Wuff._foo._bar.waldo.com", "Wuff Wuff", "_foo._bar", "waldo.com", 0);
 496 }
 497
 498 static void test_dns_name_change_suffix_one(const char *name, const char *old_suffix, const char *new_suffix, int r, const char *result) {
 499         _cleanup_free_ char *s = NULL;
 500
 501         assert_se(dns_name_change_suffix(name, old_suffix, new_suffix, &s) == r);
 502         assert_se(streq_ptr(s, result));
 503 }
 504
 505 static void test_dns_name_change_suffix(void) {
 506         test_dns_name_change_suffix_one("foo.bar", "bar", "waldo", 1, "foo.waldo");
 507         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "foo.bar.waldi.quux", "piff.paff", 1, "piff.paff");
 508         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "bar.waldi.quux", "piff.paff", 1, "foo.piff.paff");
 509         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "waldi.quux", "piff.paff", 1, "foo.bar.piff.paff");
 510         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "quux", "piff.paff", 1, "foo.bar.waldi.piff.paff");
 511         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "", "piff.paff", 1, "foo.bar.waldi.quux.piff.paff");
 512         test_dns_name_change_suffix_one("", "", "piff.paff", 1, "piff.paff");
 513         test_dns_name_change_suffix_one("", "", "", 1, ".");
 514         test_dns_name_change_suffix_one("a", "b", "c", 0, NULL);
 515 }
 516
 517 static void test_dns_name_suffix_one(const char *name, unsigned n_labels, const char *result, int ret) {
 518         const char *p = NULL;
 519
 520         assert_se(ret == dns_name_suffix(name, n_labels, &p));
 521         assert_se(streq_ptr(p, result));
 522 }
 523
 524 static void test_dns_name_suffix(void) {
 525         test_dns_name_suffix_one("foo.bar", 2, "foo.bar", 0);
 526         test_dns_name_suffix_one("foo.bar", 1, "bar", 1);
 527         test_dns_name_suffix_one("foo.bar", 0, "", 2);
 528         test_dns_name_suffix_one("foo.bar", 3, NULL, -EINVAL);
 529         test_dns_name_suffix_one("foo.bar", 4, NULL, -EINVAL);
 530
 531         test_dns_name_suffix_one("bar", 1, "bar", 0);
 532         test_dns_name_suffix_one("bar", 0, "", 1);
 533         test_dns_name_suffix_one("bar", 2, NULL, -EINVAL);
 534         test_dns_name_suffix_one("bar", 3, NULL, -EINVAL);
 535
 536         test_dns_name_suffix_one("", 0, "", 0);
 537         test_dns_name_suffix_one("", 1, NULL, -EINVAL);
 538         test_dns_name_suffix_one("", 2, NULL, -EINVAL);
 539 }
 540
 541 static void test_dns_name_count_labels_one(const char *name, int n) {
 542         assert_se(dns_name_count_labels(name) == n);
 543 }
 544
 545 static void test_dns_name_count_labels(void) {
 546         test_dns_name_count_labels_one("foo.bar.quux.", 3);
 547         test_dns_name_count_labels_one("foo.bar.quux", 3);
 548         test_dns_name_count_labels_one("foo.bar.", 2);
 549         test_dns_name_count_labels_one("foo.bar", 2);
 550         test_dns_name_count_labels_one("foo.", 1);
 551         test_dns_name_count_labels_one("foo", 1);
 552         test_dns_name_count_labels_one("", 0);
 553         test_dns_name_count_labels_one(".", 0);
 554         test_dns_name_count_labels_one("..", -EINVAL);
 555 }
 556
 557 static void test_dns_name_equal_skip_one(const char *a, unsigned n_labels, const char *b, int ret) {
 558         assert_se(dns_name_equal_skip(a, n_labels, b) == ret);
 559 }
 560
 561 static void test_dns_name_equal_skip(void) {
 562         test_dns_name_equal_skip_one("foo", 0, "bar", 0);
 563         test_dns_name_equal_skip_one("foo", 0, "foo", 1);
 564         test_dns_name_equal_skip_one("foo", 1, "foo", 0);
 565         test_dns_name_equal_skip_one("foo", 2, "foo", 0);
 566
 567         test_dns_name_equal_skip_one("foo.bar", 0, "foo.bar", 1);
 568         test_dns_name_equal_skip_one("foo.bar", 1, "foo.bar", 0);
 569         test_dns_name_equal_skip_one("foo.bar", 2, "foo.bar", 0);
 570         test_dns_name_equal_skip_one("foo.bar", 3, "foo.bar", 0);
 571
 572         test_dns_name_equal_skip_one("foo.bar", 0, "bar", 0);
 573         test_dns_name_equal_skip_one("foo.bar", 1, "bar", 1);
 574         test_dns_name_equal_skip_one("foo.bar", 2, "bar", 0);
 575         test_dns_name_equal_skip_one("foo.bar", 3, "bar", 0);
 576
 577         test_dns_name_equal_skip_one("foo.bar", 0, "", 0);
 578         test_dns_name_equal_skip_one("foo.bar", 1, "", 0);
 579         test_dns_name_equal_skip_one("foo.bar", 2, "", 1);
 580         test_dns_name_equal_skip_one("foo.bar", 3, "", 0);
 581
 582         test_dns_name_equal_skip_one("", 0, "", 1);
 583         test_dns_name_equal_skip_one("", 1, "", 0);
 584         test_dns_name_equal_skip_one("", 1, "foo", 0);
 585         test_dns_name_equal_skip_one("", 2, "foo", 0);
 586 }
 587
 588 static void test_dns_name_compare_func(void) {
 589         assert_se(dns_name_compare_func("", "") == 0);
 590         assert_se(dns_name_compare_func("", ".") == 0);
 591         assert_se(dns_name_compare_func(".", "") == 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("foo.", "foo.") == 0);
 596         assert_se(dns_name_compare_func("heise.de", "HEISE.DE.") == 0);
 597
 598         assert_se(dns_name_compare_func("de.", "heise.de") != 0);
 599 }
 600
 601 static void test_dns_name_common_suffix_one(const char *a, const char *b, const char *result) {
 602         const char *c;
 603
 604         assert_se(dns_name_common_suffix(a, b, &c) >= 0);
 605         assert_se(streq(c, result));
 606 }
 607
 608 static void test_dns_name_common_suffix(void) {
 609         test_dns_name_common_suffix_one("", "", "");
 610         test_dns_name_common_suffix_one("foo", "", "");
 611         test_dns_name_common_suffix_one("", "foo", "");
 612         test_dns_name_common_suffix_one("foo", "bar", "");
 613         test_dns_name_common_suffix_one("bar", "foo", "");
 614         test_dns_name_common_suffix_one("foo", "foo", "foo");
 615         test_dns_name_common_suffix_one("quux.foo", "foo", "foo");
 616         test_dns_name_common_suffix_one("foo", "quux.foo", "foo");
 617         test_dns_name_common_suffix_one("this.is.a.short.sentence", "this.is.another.short.sentence", "short.sentence");
 618         test_dns_name_common_suffix_one("FOO.BAR", "tEST.bAR", "BAR");
 619 }
 620
 621 static void test_dns_name_apply_idna_one(const char *s, int expected, const char *result) {
 622         _cleanup_free_ char *buf = NULL;
 623         int r;
 624
 625         r = dns_name_apply_idna(s, &buf);
 626         log_debug("dns_name_apply_idna: \"%s\" → %d/\"%s\" (expected %d/\"%s\")",
 627                   s, r, strnull(buf), expected, strnull(result));
 628
 629         /* Different libidn2 versions are more and less accepting
 630          * of underscore-prefixed names. So let's list the lowest
 631          * expected return value. */
 632         assert_se(r >= expected);
 633         if (expected == 1)
 634                 assert_se(dns_name_equal(buf, result) == 1);
 635 }
 636
 637 static void test_dns_name_apply_idna(void) {
 638 #if HAVE_LIBIDN2 || HAVE_LIBIDN
 639         const int ret = 1;
 640 #else
 641         const int ret = 0;
 642 #endif
 643
 644         /* IDNA2008 forbids names with hyphens in third and fourth positions
 645          * (https://tools.ietf.org/html/rfc5891#section-4.2.3.1).
 646          * IDNA2003 does not have this restriction
 647          * (https://tools.ietf.org/html/rfc3490#section-5).
 648          * This means that when using libidn we will transform and test more
 649          * labels. If registrars follow IDNA2008 we'll just be performing a
 650          * useless lookup.
 651          */
 652 #if HAVE_LIBIDN
 653         const int ret2 = 1;
 654 #else
 655         const int ret2 = 0;
 656 #endif
 657
 658         test_dns_name_apply_idna_one("", ret, "");
 659         test_dns_name_apply_idna_one("foo", ret, "foo");
 660         test_dns_name_apply_idna_one("foo.", ret, "foo");
 661         test_dns_name_apply_idna_one("foo.bar", ret, "foo.bar");
 662         test_dns_name_apply_idna_one("foo.bar.", ret, "foo.bar");
 663         test_dns_name_apply_idna_one("föö", ret, "xn--f-1gaa");
 664         test_dns_name_apply_idna_one("föö.", ret, "xn--f-1gaa");
 665         test_dns_name_apply_idna_one("föö.bär", ret, "xn--f-1gaa.xn--br-via");
 666         test_dns_name_apply_idna_one("föö.bär.", ret, "xn--f-1gaa.xn--br-via");
 667         test_dns_name_apply_idna_one("xn--f-1gaa.xn--br-via", ret, "xn--f-1gaa.xn--br-via");
 668
 669         test_dns_name_apply_idna_one("_443._tcp.fedoraproject.org", ret2,
 670                                      "_443._tcp.fedoraproject.org");
 671         test_dns_name_apply_idna_one("_443", ret2, "_443");
 672         test_dns_name_apply_idna_one("gateway", ret, "gateway");
 673         test_dns_name_apply_idna_one("_gateway", ret2, "_gateway");
 674
 675         test_dns_name_apply_idna_one("r3---sn-ab5l6ne7.googlevideo.com", ret2,
 676                                      ret2 ? "r3---sn-ab5l6ne7.googlevideo.com" : "");
 677 }
 678
 679 static void test_dns_name_is_valid_or_address(void) {
 680         assert_se(dns_name_is_valid_or_address(NULL) == 0);
 681         assert_se(dns_name_is_valid_or_address("") == 0);
 682         assert_se(dns_name_is_valid_or_address("foobar") > 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("foobar.com.") > 0);
 686         assert_se(dns_name_is_valid_or_address("127.0.0.1") > 0);
 687         assert_se(dns_name_is_valid_or_address("::") > 0);
 688         assert_se(dns_name_is_valid_or_address("::1") > 0);
 689 }
 690
 691 int main(int argc, char *argv[]) {
 692         log_set_max_level(LOG_DEBUG);
 693         log_parse_environment();
 694         log_open();
 695
 696         test_dns_label_unescape();
 697         test_dns_label_unescape_suffix();
 698         test_dns_label_escape();
 699         test_dns_name_normalize();
 700         test_dns_name_equal();
 701         test_dns_name_endswith();
 702         test_dns_name_startswith();
 703         test_dns_name_between();
 704         test_dns_name_is_root();
 705         test_dns_name_is_single_label();
 706         test_dns_name_reverse();
 707         test_dns_name_concat();
 708         test_dns_name_is_valid();
 709         test_dns_name_to_wire_format();
 710         test_dns_service_name_is_valid();
 711         test_dns_srv_type_is_valid();
 712         test_dnssd_srv_type_is_valid();
 713         test_dns_service_join();
 714         test_dns_service_split();
 715         test_dns_name_change_suffix();
 716         test_dns_name_suffix();
 717         test_dns_name_count_labels();
 718         test_dns_name_equal_skip();
 719         test_dns_name_compare_func();
 720         test_dns_name_common_suffix();
 721         test_dns_name_apply_idna();
 722         test_dns_name_is_valid_or_address();
 723
 724         return 0;
 725 }