src/test/test-dns-domain.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2014 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18  ***/
  19
  20 #include "alloc-util.h"
  21 #include "dns-domain.h"
  22 #include "macro.h"
  23 #include "string-util.h"
  24
  25 static void test_dns_label_unescape_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
  26         char buffer[buffer_sz];
  27         int r;
  28
  29         r = dns_label_unescape(&what, buffer, buffer_sz);
  30         assert_se(r == ret);
  31
  32         if (r < 0)
  33                 return;
  34
  35         assert_se(streq(buffer, expect));
  36 }
  37
  38 static void test_dns_label_unescape(void) {
  39         test_dns_label_unescape_one("hallo", "hallo", 6, 5);
  40         test_dns_label_unescape_one("hallo", "hallo", 4, -ENOBUFS);
  41         test_dns_label_unescape_one("", "", 10, 0);
  42         test_dns_label_unescape_one("hallo\\.foobar", "hallo.foobar", 20, 12);
  43         test_dns_label_unescape_one("hallo.foobar", "hallo", 10, 5);
  44         test_dns_label_unescape_one("hallo\n.foobar", "hallo", 20, -EINVAL);
  45         test_dns_label_unescape_one("hallo\\", "hallo", 20, -EINVAL);
  46         test_dns_label_unescape_one("hallo\\032 ", "hallo  ", 20, 7);
  47         test_dns_label_unescape_one(".", "", 20, 0);
  48         test_dns_label_unescape_one("..", "", 20, -EINVAL);
  49         test_dns_label_unescape_one(".foobar", "", 20, -EINVAL);
  50         test_dns_label_unescape_one("foobar.", "foobar", 20, 6);
  51         test_dns_label_unescape_one("foobar..", "foobar", 20, -EINVAL);
  52 }
  53
  54 static void test_dns_name_to_wire_format_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
  55         uint8_t buffer[buffer_sz];
  56         int r;
  57
  58         r = dns_name_to_wire_format(what, buffer, buffer_sz, false);
  59         assert_se(r == ret);
  60
  61         if (r < 0)
  62                 return;
  63
  64         assert_se(!memcmp(buffer, expect, r));
  65 }
  66
  67 static void test_dns_name_to_wire_format(void) {
  68         static const char out0[] = { 0 };
  69         static const char out1[] = { 3, 'f', 'o', 'o', 0 };
  70         static const char out2[] = { 5, 'h', 'a', 'l', 'l', 'o', 3, 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
  71         static const char out3[] = { 4, ' ', 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
  72         static const char out4[] = { 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                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  83                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  84                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  85                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  86                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  87                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  88                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  89                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  90                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  91                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  92                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  93                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  94                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  95                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  96                                      9, 'a', '1', '2', '3', '4', '5', '6', '7', '8',
  97                                      3, 'a', '1', '2', 0 };
  98
  99         test_dns_name_to_wire_format_one("", out0, sizeof(out0), sizeof(out0));
 100
 101         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1), sizeof(out1));
 102         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) + 1, sizeof(out1));
 103         test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) - 1, -ENOBUFS);
 104
 105         test_dns_name_to_wire_format_one("hallo.foo.bar", out2, sizeof(out2), sizeof(out2));
 106         test_dns_name_to_wire_format_one("hallo.foo..bar", NULL, 32, -EINVAL);
 107
 108         test_dns_name_to_wire_format_one("\\032foo.bar", out3, sizeof(out3), sizeof(out3));
 109
 110         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);
 111         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));
 112 }
 113
 114 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) {
 115         char buffer[buffer_sz];
 116         const char *label;
 117         int r;
 118
 119         label = what + strlen(what);
 120
 121         r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
 122         assert_se(r == ret1);
 123         if (r >= 0)
 124                 assert_se(streq(buffer, expect1));
 125
 126         r = dns_label_unescape_suffix(what, &label, buffer, buffer_sz);
 127         assert_se(r == ret2);
 128         if (r >= 0)
 129                 assert_se(streq(buffer, expect2));
 130 }
 131
 132 static void test_dns_label_unescape_suffix(void) {
 133         test_dns_label_unescape_suffix_one("hallo", "hallo", "", 6, 5, 0);
 134         test_dns_label_unescape_suffix_one("hallo", "hallo", "", 4, -ENOBUFS, -ENOBUFS);
 135         test_dns_label_unescape_suffix_one("", "", "", 10, 0, 0);
 136         test_dns_label_unescape_suffix_one("hallo\\.foobar", "hallo.foobar", "", 20, 12, 0);
 137         test_dns_label_unescape_suffix_one("hallo.foobar", "foobar", "hallo", 10, 6, 5);
 138         test_dns_label_unescape_suffix_one("hallo.foobar\n", "foobar", "foobar", 20, -EINVAL, -EINVAL);
 139         test_dns_label_unescape_suffix_one("hallo\\", "hallo", "hallo", 20, -EINVAL, -EINVAL);
 140         test_dns_label_unescape_suffix_one("hallo\\032 ", "hallo  ", "", 20, 7, 0);
 141         test_dns_label_unescape_suffix_one(".", "", "", 20, 0, 0);
 142         test_dns_label_unescape_suffix_one("..", "", "", 20, 0, -EINVAL);
 143         test_dns_label_unescape_suffix_one(".foobar", "foobar", "", 20, 6, -EINVAL);
 144         test_dns_label_unescape_suffix_one("foobar.", "foobar", "", 20, 6, 0);
 145         test_dns_label_unescape_suffix_one("foo\\\\bar", "foo\\bar", "", 20, 7, 0);
 146         test_dns_label_unescape_suffix_one("foo.bar", "bar", "foo", 20, 3, 3);
 147         test_dns_label_unescape_suffix_one("foo..bar", "bar", "", 20, 3, -EINVAL);
 148         test_dns_label_unescape_suffix_one("foo...bar", "bar", "", 20, 3, -EINVAL);
 149         test_dns_label_unescape_suffix_one("foo\\.bar", "foo.bar", "", 20, 7, 0);
 150         test_dns_label_unescape_suffix_one("foo\\\\.bar", "bar", "foo\\", 20, 3, 4);
 151         test_dns_label_unescape_suffix_one("foo\\\\\\.bar", "foo\\.bar", "", 20, 8, 0);
 152 }
 153
 154 static void test_dns_label_escape_one(const char *what, size_t l, const char *expect, int ret) {
 155         _cleanup_free_ char *t = NULL;
 156         int r;
 157
 158         r = dns_label_escape_new(what, l, &t);
 159         assert_se(r == ret);
 160
 161         if (r < 0)
 162                 return;
 163
 164         assert_se(streq_ptr(expect, t));
 165 }
 166
 167 static void test_dns_label_escape(void) {
 168         test_dns_label_escape_one("", 0, NULL, -EINVAL);
 169         test_dns_label_escape_one("hallo", 5, "hallo", 5);
 170         test_dns_label_escape_one("hallo", 6, "hallo\\000", 9);
 171         test_dns_label_escape_one("hallo hallo.foobar,waldi", 24, "hallo\\032hallo\\.foobar\\044waldi", 31);
 172 }
 173
 174 static void test_dns_name_normalize_one(const char *what, const char *expect, int ret) {
 175         _cleanup_free_ char *t = NULL;
 176         int r;
 177
 178         r = dns_name_normalize(what, &t);
 179         assert_se(r == ret);
 180
 181         if (r < 0)
 182                 return;
 183
 184         assert_se(streq_ptr(expect, t));
 185 }
 186
 187 static void test_dns_name_normalize(void) {
 188         test_dns_name_normalize_one("", ".", 0);
 189         test_dns_name_normalize_one("f", "f", 0);
 190         test_dns_name_normalize_one("f.waldi", "f.waldi", 0);
 191         test_dns_name_normalize_one("f \\032.waldi", "f\\032\\032.waldi", 0);
 192         test_dns_name_normalize_one("\\000", "\\000", 0);
 193         test_dns_name_normalize_one("..", NULL, -EINVAL);
 194         test_dns_name_normalize_one(".foobar", NULL, -EINVAL);
 195         test_dns_name_normalize_one("foobar.", "foobar", 0);
 196         test_dns_name_normalize_one(".", ".", 0);
 197 }
 198
 199 static void test_dns_name_equal_one(const char *a, const char *b, int ret) {
 200         int r;
 201
 202         r = dns_name_equal(a, b);
 203         assert_se(r == ret);
 204
 205         r = dns_name_equal(b, a);
 206         assert_se(r == ret);
 207 }
 208
 209 static void test_dns_name_equal(void) {
 210         test_dns_name_equal_one("", "", true);
 211         test_dns_name_equal_one("x", "x", true);
 212         test_dns_name_equal_one("x", "x.", true);
 213         test_dns_name_equal_one("abc.def", "abc.def", true);
 214         test_dns_name_equal_one("abc.def", "ABC.def", true);
 215         test_dns_name_equal_one("abc.def", "CBA.def", false);
 216         test_dns_name_equal_one("", "xxx", false);
 217         test_dns_name_equal_one("ab", "a", false);
 218         test_dns_name_equal_one("\\000", "\\000", true);
 219         test_dns_name_equal_one(".", "", true);
 220         test_dns_name_equal_one(".", ".", true);
 221         test_dns_name_equal_one("..", "..", -EINVAL);
 222 }
 223
 224 static void test_dns_name_between_one(const char *a, const char *b, const char *c, int ret) {
 225         int r;
 226
 227         r = dns_name_between(a, b, c);
 228         assert_se(r == ret);
 229
 230         r = dns_name_between(c, b, a);
 231         if (ret >= 0)
 232                 assert_se(r == 0);
 233         else
 234                 assert_se(r == ret);
 235 }
 236
 237 static void test_dns_name_between(void) {
 238         /* see https://tools.ietf.org/html/rfc4034#section-6.1
 239            Note that we use "\033.z.example" in stead of "\001.z.example" as we
 240            consider the latter invalid */
 241         test_dns_name_between_one("example", "a.example", "yljkjljk.a.example", true);
 242         test_dns_name_between_one("a.example", "yljkjljk.a.example", "Z.a.example", true);
 243         test_dns_name_between_one("yljkjljk.a.example", "Z.a.example", "zABC.a.EXAMPLE", true);
 244         test_dns_name_between_one("Z.a.example", "zABC.a.EXAMPLE", "z.example", true);
 245         test_dns_name_between_one("zABC.a.EXAMPLE", "z.example", "\\033.z.example", true);
 246         test_dns_name_between_one("z.example", "\\033.z.example", "*.z.example", true);
 247         test_dns_name_between_one("\\033.z.example", "*.z.example", "\\200.z.example", true);
 248         test_dns_name_between_one("*.z.example", "\\200.z.example", "example", true);
 249         test_dns_name_between_one("\\200.z.example", "example", "a.example", true);
 250
 251         test_dns_name_between_one("example", "a.example", "example", -EINVAL);
 252         test_dns_name_between_one("example", "example", "yljkjljk.a.example", false);
 253         test_dns_name_between_one("example", "yljkjljk.a.example", "yljkjljk.a.example", false);
 254 }
 255
 256 static void test_dns_name_endswith_one(const char *a, const char *b, int ret) {
 257         assert_se(dns_name_endswith(a, b) == ret);
 258 }
 259
 260 static void test_dns_name_endswith(void) {
 261         test_dns_name_endswith_one("", "", true);
 262         test_dns_name_endswith_one("", "xxx", false);
 263         test_dns_name_endswith_one("xxx", "", true);
 264         test_dns_name_endswith_one("x", "x", true);
 265         test_dns_name_endswith_one("x", "y", false);
 266         test_dns_name_endswith_one("x.y", "y", true);
 267         test_dns_name_endswith_one("x.y", "Y", true);
 268         test_dns_name_endswith_one("x.y", "x", false);
 269         test_dns_name_endswith_one("x.y.z", "Z", true);
 270         test_dns_name_endswith_one("x.y.z", "y.Z", true);
 271         test_dns_name_endswith_one("x.y.z", "x.y.Z", true);
 272         test_dns_name_endswith_one("x.y.z", "waldo", false);
 273         test_dns_name_endswith_one("x.y.z.u.v.w", "y.z", false);
 274         test_dns_name_endswith_one("x.y.z.u.v.w", "u.v.w", true);
 275         test_dns_name_endswith_one("x.y\001.z", "waldo", -EINVAL);
 276 }
 277
 278 static void test_dns_name_startswith_one(const char *a, const char *b, int ret) {
 279         assert_se(dns_name_startswith(a, b) == ret);
 280 }
 281
 282 static void test_dns_name_startswith(void) {
 283         test_dns_name_startswith_one("", "", true);
 284         test_dns_name_startswith_one("", "xxx", false);
 285         test_dns_name_startswith_one("xxx", "", true);
 286         test_dns_name_startswith_one("x", "x", true);
 287         test_dns_name_startswith_one("x", "y", false);
 288         test_dns_name_startswith_one("x.y", "x.y", true);
 289         test_dns_name_startswith_one("x.y", "y.x", false);
 290         test_dns_name_startswith_one("x.y", "x", true);
 291         test_dns_name_startswith_one("x.y", "X", true);
 292         test_dns_name_startswith_one("x.y", "y", false);
 293         test_dns_name_startswith_one("x.y", "", true);
 294         test_dns_name_startswith_one("x.y", "X", true);
 295 }
 296
 297 static void test_dns_name_is_root(void) {
 298         assert_se(dns_name_is_root(""));
 299         assert_se(dns_name_is_root("."));
 300         assert_se(!dns_name_is_root("xxx"));
 301         assert_se(!dns_name_is_root("xxx."));
 302         assert_se(!dns_name_is_root(".."));
 303 }
 304
 305 static void test_dns_name_is_single_label(void) {
 306         assert_se(!dns_name_is_single_label(""));
 307         assert_se(!dns_name_is_single_label("."));
 308         assert_se(!dns_name_is_single_label(".."));
 309         assert_se(dns_name_is_single_label("x"));
 310         assert_se(dns_name_is_single_label("x."));
 311         assert_se(!dns_name_is_single_label("xx.yy"));
 312 }
 313
 314 static void test_dns_name_reverse_one(const char *address, const char *name) {
 315         _cleanup_free_ char *p = NULL;
 316         union in_addr_union a, b = {};
 317         int familya, familyb;
 318
 319         assert_se(in_addr_from_string_auto(address, &familya, &a) >= 0);
 320         assert_se(dns_name_reverse(familya, &a, &p) >= 0);
 321         assert_se(streq(p, name));
 322         assert_se(dns_name_address(p, &familyb, &b) > 0);
 323         assert_se(familya == familyb);
 324         assert_se(in_addr_equal(familya, &a, &b));
 325 }
 326
 327 static void test_dns_name_reverse(void) {
 328         test_dns_name_reverse_one("47.11.8.15", "15.8.11.47.in-addr.arpa");
 329         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");
 330         test_dns_name_reverse_one("127.0.0.1", "1.0.0.127.in-addr.arpa");
 331         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");
 332 }
 333
 334 static void test_dns_name_concat_one(const char *a, const char *b, int r, const char *result) {
 335         _cleanup_free_ char *p = NULL;
 336
 337         assert_se(dns_name_concat(a, b, &p) == r);
 338         assert_se(streq_ptr(p, result));
 339 }
 340
 341 static void test_dns_name_concat(void) {
 342         test_dns_name_concat_one("", "", 0, ".");
 343         test_dns_name_concat_one(".", "", 0, ".");
 344         test_dns_name_concat_one("", ".", 0, ".");
 345         test_dns_name_concat_one(".", ".", 0, ".");
 346         test_dns_name_concat_one("foo", "bar", 0, "foo.bar");
 347         test_dns_name_concat_one("foo.foo", "bar.bar", 0, "foo.foo.bar.bar");
 348         test_dns_name_concat_one("foo", NULL, 0, "foo");
 349         test_dns_name_concat_one("foo", ".", 0, "foo");
 350         test_dns_name_concat_one("foo.", "bar.", 0, "foo.bar");
 351         test_dns_name_concat_one(NULL, NULL, 0, ".");
 352         test_dns_name_concat_one(NULL, ".", 0, ".");
 353         test_dns_name_concat_one(NULL, "foo", 0, "foo");
 354 }
 355
 356 static void test_dns_name_is_valid_one(const char *s, int ret) {
 357         assert_se(dns_name_is_valid(s) == ret);
 358 }
 359
 360 static void test_dns_name_is_valid(void) {
 361         test_dns_name_is_valid_one("foo", 1);
 362         test_dns_name_is_valid_one("foo.", 1);
 363         test_dns_name_is_valid_one("foo..", 0);
 364         test_dns_name_is_valid_one("Foo", 1);
 365         test_dns_name_is_valid_one("foo.bar", 1);
 366         test_dns_name_is_valid_one("foo.bar.baz", 1);
 367         test_dns_name_is_valid_one("", 1);
 368         test_dns_name_is_valid_one("foo..bar", 0);
 369         test_dns_name_is_valid_one(".foo.bar", 0);
 370         test_dns_name_is_valid_one("foo.bar.", 1);
 371         test_dns_name_is_valid_one("foo.bar..", 0);
 372         test_dns_name_is_valid_one("\\zbar", 0);
 373         test_dns_name_is_valid_one("ä", 1);
 374         test_dns_name_is_valid_one("\n", 0);
 375
 376         /* 256 characters */
 377         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);
 378
 379         /* 255 characters */
 380         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);
 381
 382         /* 254 characters */
 383         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);
 384
 385         /* 253 characters */
 386         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);
 387
 388         /* label of 64 chars length */
 389         test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a123", 0);
 390
 391         /* label of 63 chars length */
 392         test_dns_name_is_valid_one("a123456789a123456789a123456789a123456789a123456789a123456789a12", 1);
 393 }
 394
 395 static void test_dns_service_name_is_valid(void) {
 396         assert_se(dns_service_name_is_valid("Lennart's Compüter"));
 397         assert_se(dns_service_name_is_valid("piff.paff"));
 398
 399         assert_se(!dns_service_name_is_valid(NULL));
 400         assert_se(!dns_service_name_is_valid(""));
 401         assert_se(!dns_service_name_is_valid("foo\nbar"));
 402         assert_se(!dns_service_name_is_valid("foo\201bar"));
 403         assert_se(!dns_service_name_is_valid("this is an overly long string that is certainly longer than 63 characters"));
 404 }
 405
 406 static void test_dns_srv_type_is_valid(void) {
 407
 408         assert_se(dns_srv_type_is_valid("_http._tcp"));
 409         assert_se(dns_srv_type_is_valid("_foo-bar._tcp"));
 410         assert_se(dns_srv_type_is_valid("_w._udp"));
 411         assert_se(dns_srv_type_is_valid("_a800._tcp"));
 412         assert_se(dns_srv_type_is_valid("_a-800._tcp"));
 413
 414         assert_se(!dns_srv_type_is_valid(NULL));
 415         assert_se(!dns_srv_type_is_valid(""));
 416         assert_se(!dns_srv_type_is_valid("x"));
 417         assert_se(!dns_srv_type_is_valid("_foo"));
 418         assert_se(!dns_srv_type_is_valid("_tcp"));
 419         assert_se(!dns_srv_type_is_valid("_"));
 420         assert_se(!dns_srv_type_is_valid("_foo."));
 421         assert_se(!dns_srv_type_is_valid("_föo._tcp"));
 422         assert_se(!dns_srv_type_is_valid("_f\no._tcp"));
 423         assert_se(!dns_srv_type_is_valid("_800._tcp"));
 424         assert_se(!dns_srv_type_is_valid("_-800._tcp"));
 425         assert_se(!dns_srv_type_is_valid("_-foo._tcp"));
 426         assert_se(!dns_srv_type_is_valid("_piep._foo._udp"));
 427 }
 428
 429 static void test_dns_service_join_one(const char *a, const char *b, const char *c, int r, const char *d) {
 430         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
 431
 432         assert_se(dns_service_join(a, b, c, &t) == r);
 433         assert_se(streq_ptr(t, d));
 434
 435         if (r < 0)
 436                 return;
 437
 438         assert_se(dns_service_split(t, &x, &y, &z) >= 0);
 439         assert_se(streq_ptr(a, x));
 440         assert_se(streq_ptr(b, y));
 441         assert_se(dns_name_equal(c, z) > 0);
 442 }
 443
 444 static void test_dns_service_join(void) {
 445         test_dns_service_join_one("", "", "", -EINVAL, NULL);
 446         test_dns_service_join_one("", "_http._tcp", "", -EINVAL, NULL);
 447         test_dns_service_join_one("", "_http._tcp", "foo", -EINVAL, NULL);
 448         test_dns_service_join_one("foo", "", "foo", -EINVAL, NULL);
 449         test_dns_service_join_one("foo", "foo", "foo", -EINVAL, NULL);
 450
 451         test_dns_service_join_one("foo", "_http._tcp", "", 0, "foo._http._tcp");
 452         test_dns_service_join_one(NULL, "_http._tcp", "", 0, "_http._tcp");
 453         test_dns_service_join_one("foo", "_http._tcp", "foo", 0, "foo._http._tcp.foo");
 454         test_dns_service_join_one(NULL, "_http._tcp", "foo", 0, "_http._tcp.foo");
 455         test_dns_service_join_one("Lennart's PC", "_pc._tcp", "foo.bar.com", 0, "Lennart\\039s\\032PC._pc._tcp.foo.bar.com");
 456         test_dns_service_join_one(NULL, "_pc._tcp", "foo.bar.com", 0, "_pc._tcp.foo.bar.com");
 457 }
 458
 459 static void test_dns_service_split_one(const char *joined, const char *a, const char *b, const char *c, int r) {
 460         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *t = NULL;
 461
 462         assert_se(dns_service_split(joined, &x, &y, &z) == r);
 463         assert_se(streq_ptr(x, a));
 464         assert_se(streq_ptr(y, b));
 465         assert_se(streq_ptr(z, c));
 466
 467         if (r < 0)
 468                 return;
 469
 470         if (y) {
 471                 assert_se(dns_service_join(x, y, z, &t) == 0);
 472                 assert_se(dns_name_equal(joined, t) > 0);
 473         } else
 474                 assert_se(!x && dns_name_equal(z, joined) > 0);
 475 }
 476
 477 static void test_dns_service_split(void) {
 478         test_dns_service_split_one("", NULL, NULL, ".", 0);
 479         test_dns_service_split_one("foo", NULL, NULL, "foo", 0);
 480         test_dns_service_split_one("foo.bar", NULL, NULL, "foo.bar", 0);
 481         test_dns_service_split_one("_foo.bar", NULL, NULL, "_foo.bar", 0);
 482         test_dns_service_split_one("_foo._bar", NULL, "_foo._bar", ".", 0);
 483         test_dns_service_split_one("_meh._foo._bar", "_meh", "_foo._bar", ".", 0);
 484         test_dns_service_split_one("Wuff\\032Wuff._foo._bar.waldo.com", "Wuff Wuff", "_foo._bar", "waldo.com", 0);
 485 }
 486
 487 static void test_dns_name_change_suffix_one(const char *name, const char *old_suffix, const char *new_suffix, int r, const char *result) {
 488         _cleanup_free_ char *s = NULL;
 489
 490         assert_se(dns_name_change_suffix(name, old_suffix, new_suffix, &s) == r);
 491         assert_se(streq_ptr(s, result));
 492 }
 493
 494 static void test_dns_name_change_suffix(void) {
 495         test_dns_name_change_suffix_one("foo.bar", "bar", "waldo", 1, "foo.waldo");
 496         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "foo.bar.waldi.quux", "piff.paff", 1, "piff.paff");
 497         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "bar.waldi.quux", "piff.paff", 1, "foo.piff.paff");
 498         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "waldi.quux", "piff.paff", 1, "foo.bar.piff.paff");
 499         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "quux", "piff.paff", 1, "foo.bar.waldi.piff.paff");
 500         test_dns_name_change_suffix_one("foo.bar.waldi.quux", "", "piff.paff", 1, "foo.bar.waldi.quux.piff.paff");
 501         test_dns_name_change_suffix_one("", "", "piff.paff", 1, "piff.paff");
 502         test_dns_name_change_suffix_one("", "", "", 1, ".");
 503         test_dns_name_change_suffix_one("a", "b", "c", 0, NULL);
 504 }
 505
 506 static void test_dns_name_suffix_one(const char *name, unsigned n_labels, const char *result, int ret) {
 507         const char *p = NULL;
 508
 509         assert_se(ret == dns_name_suffix(name, n_labels, &p));
 510         assert_se(streq_ptr(p, result));
 511 }
 512
 513 static void test_dns_name_suffix(void) {
 514         test_dns_name_suffix_one("foo.bar", 2, "foo.bar", 0);
 515         test_dns_name_suffix_one("foo.bar", 1, "bar", 1);
 516         test_dns_name_suffix_one("foo.bar", 0, "", 2);
 517         test_dns_name_suffix_one("foo.bar", 3, NULL, -EINVAL);
 518         test_dns_name_suffix_one("foo.bar", 4, NULL, -EINVAL);
 519
 520         test_dns_name_suffix_one("bar", 1, "bar", 0);
 521         test_dns_name_suffix_one("bar", 0, "", 1);
 522         test_dns_name_suffix_one("bar", 2, NULL, -EINVAL);
 523         test_dns_name_suffix_one("bar", 3, NULL, -EINVAL);
 524
 525         test_dns_name_suffix_one("", 0, "", 0);
 526         test_dns_name_suffix_one("", 1, NULL, -EINVAL);
 527         test_dns_name_suffix_one("", 2, NULL, -EINVAL);
 528 }
 529
 530 static void test_dns_name_count_labels_one(const char *name, int n) {
 531         assert_se(dns_name_count_labels(name) == n);
 532 }
 533
 534 static void test_dns_name_count_labels(void) {
 535         test_dns_name_count_labels_one("foo.bar.quux.", 3);
 536         test_dns_name_count_labels_one("foo.bar.quux", 3);
 537         test_dns_name_count_labels_one("foo.bar.", 2);
 538         test_dns_name_count_labels_one("foo.bar", 2);
 539         test_dns_name_count_labels_one("foo.", 1);
 540         test_dns_name_count_labels_one("foo", 1);
 541         test_dns_name_count_labels_one("", 0);
 542         test_dns_name_count_labels_one(".", 0);
 543         test_dns_name_count_labels_one("..", -EINVAL);
 544 }
 545
 546 static void test_dns_name_equal_skip_one(const char *a, unsigned n_labels, const char *b, int ret) {
 547         assert_se(dns_name_equal_skip(a, n_labels, b) == ret);
 548 }
 549
 550 static void test_dns_name_equal_skip(void) {
 551         test_dns_name_equal_skip_one("foo", 0, "bar", 0);
 552         test_dns_name_equal_skip_one("foo", 0, "foo", 1);
 553         test_dns_name_equal_skip_one("foo", 1, "foo", 0);
 554         test_dns_name_equal_skip_one("foo", 2, "foo", 0);
 555
 556         test_dns_name_equal_skip_one("foo.bar", 0, "foo.bar", 1);
 557         test_dns_name_equal_skip_one("foo.bar", 1, "foo.bar", 0);
 558         test_dns_name_equal_skip_one("foo.bar", 2, "foo.bar", 0);
 559         test_dns_name_equal_skip_one("foo.bar", 3, "foo.bar", 0);
 560
 561         test_dns_name_equal_skip_one("foo.bar", 0, "bar", 0);
 562         test_dns_name_equal_skip_one("foo.bar", 1, "bar", 1);
 563         test_dns_name_equal_skip_one("foo.bar", 2, "bar", 0);
 564         test_dns_name_equal_skip_one("foo.bar", 3, "bar", 0);
 565
 566         test_dns_name_equal_skip_one("foo.bar", 0, "", 0);
 567         test_dns_name_equal_skip_one("foo.bar", 1, "", 0);
 568         test_dns_name_equal_skip_one("foo.bar", 2, "", 1);
 569         test_dns_name_equal_skip_one("foo.bar", 3, "", 0);
 570
 571         test_dns_name_equal_skip_one("", 0, "", 1);
 572         test_dns_name_equal_skip_one("", 1, "", 0);
 573         test_dns_name_equal_skip_one("", 1, "foo", 0);
 574         test_dns_name_equal_skip_one("", 2, "foo", 0);
 575 }
 576
 577 static void test_dns_name_compare_func(void) {
 578         assert_se(dns_name_compare_func("", "") == 0);
 579         assert_se(dns_name_compare_func("", ".") == 0);
 580         assert_se(dns_name_compare_func(".", "") == 0);
 581         assert_se(dns_name_compare_func("foo", "foo.") == 0);
 582         assert_se(dns_name_compare_func("foo.", "foo") == 0);
 583         assert_se(dns_name_compare_func("foo", "foo") == 0);
 584         assert_se(dns_name_compare_func("foo.", "foo.") == 0);
 585         assert_se(dns_name_compare_func("heise.de", "HEISE.DE.") == 0);
 586
 587         assert_se(dns_name_compare_func("de.", "heise.de") != 0);
 588 }
 589
 590 static void test_dns_name_common_suffix_one(const char *a, const char *b, const char *result) {
 591         const char *c;
 592
 593         assert_se(dns_name_common_suffix(a, b, &c) >= 0);
 594         assert_se(streq(c, result));
 595 }
 596
 597 static void test_dns_name_common_suffix(void) {
 598         test_dns_name_common_suffix_one("", "", "");
 599         test_dns_name_common_suffix_one("foo", "", "");
 600         test_dns_name_common_suffix_one("", "foo", "");
 601         test_dns_name_common_suffix_one("foo", "bar", "");
 602         test_dns_name_common_suffix_one("bar", "foo", "");
 603         test_dns_name_common_suffix_one("foo", "foo", "foo");
 604         test_dns_name_common_suffix_one("quux.foo", "foo", "foo");
 605         test_dns_name_common_suffix_one("foo", "quux.foo", "foo");
 606         test_dns_name_common_suffix_one("this.is.a.short.sentence", "this.is.another.short.sentence", "short.sentence");
 607         test_dns_name_common_suffix_one("FOO.BAR", "tEST.bAR", "BAR");
 608 }
 609
 610 static void test_dns_name_apply_idna_one(const char *s, int expected, const char *result) {
 611         _cleanup_free_ char *buf = NULL;
 612         int r;
 613
 614         r = dns_name_apply_idna(s, &buf);
 615         log_debug("dns_name_apply_idna: \"%s\" → %d/\"%s\" (expected %d/\"%s\")",
 616                   s, r, strnull(buf), expected, strnull(result));
 617
 618         /* Different libidn2 versions are more and less accepting
 619          * of underscore-prefixed names. So let's list the lowest
 620          * expected return value. */
 621         assert_se(r >= expected);
 622         if (expected == 1)
 623                 assert_se(dns_name_equal(buf, result) == 1);
 624 }
 625
 626 static void test_dns_name_apply_idna(void) {
 627 #if HAVE_LIBIDN2 || HAVE_LIBIDN
 628         const int ret = 1;
 629 #else
 630         const int ret = 0;
 631 #endif
 632
 633         /* IDNA2008 forbids names with hyphens in third and fourth positions
 634          * (https://tools.ietf.org/html/rfc5891#section-4.2.3.1).
 635          * IDNA2003 does not have this restriction
 636          * (https://tools.ietf.org/html/rfc3490#section-5).
 637          * This means that when using libidn we will transform and test more
 638          * labels. If registrars follow IDNA2008 we'll just be performing a
 639          * useless lookup.
 640          */
 641 #if HAVE_LIBIDN
 642         const int ret2 = 1;
 643 #else
 644         const int ret2 = 0;
 645 #endif
 646
 647         test_dns_name_apply_idna_one("", ret, "");
 648         test_dns_name_apply_idna_one("foo", ret, "foo");
 649         test_dns_name_apply_idna_one("foo.", ret, "foo");
 650         test_dns_name_apply_idna_one("foo.bar", ret, "foo.bar");
 651         test_dns_name_apply_idna_one("foo.bar.", ret, "foo.bar");
 652         test_dns_name_apply_idna_one("föö", ret, "xn--f-1gaa");
 653         test_dns_name_apply_idna_one("föö.", ret, "xn--f-1gaa");
 654         test_dns_name_apply_idna_one("föö.bär", ret, "xn--f-1gaa.xn--br-via");
 655         test_dns_name_apply_idna_one("föö.bär.", ret, "xn--f-1gaa.xn--br-via");
 656         test_dns_name_apply_idna_one("xn--f-1gaa.xn--br-via", ret, "xn--f-1gaa.xn--br-via");
 657
 658         test_dns_name_apply_idna_one("_443._tcp.fedoraproject.org", ret2,
 659                                      "_443._tcp.fedoraproject.org");
 660         test_dns_name_apply_idna_one("_443", ret2, "_443");
 661         test_dns_name_apply_idna_one("gateway", ret, "gateway");
 662         test_dns_name_apply_idna_one("_gateway", ret2, "_gateway");
 663
 664         test_dns_name_apply_idna_one("r3---sn-ab5l6ne7.googlevideo.com", ret2,
 665                                      ret2 ? "r3---sn-ab5l6ne7.googlevideo.com" : "");
 666 }
 667
 668 static void test_dns_name_is_valid_or_address(void) {
 669         assert_se(dns_name_is_valid_or_address(NULL) == 0);
 670         assert_se(dns_name_is_valid_or_address("") == 0);
 671         assert_se(dns_name_is_valid_or_address("foobar") > 0);
 672         assert_se(dns_name_is_valid_or_address("foobar.com") > 0);
 673         assert_se(dns_name_is_valid_or_address("foobar..com") == 0);
 674         assert_se(dns_name_is_valid_or_address("foobar.com.") > 0);
 675         assert_se(dns_name_is_valid_or_address("127.0.0.1") > 0);
 676         assert_se(dns_name_is_valid_or_address("::") > 0);
 677         assert_se(dns_name_is_valid_or_address("::1") > 0);
 678 }
 679
 680 int main(int argc, char *argv[]) {
 681         log_set_max_level(LOG_DEBUG);
 682         log_parse_environment();
 683         log_open();
 684
 685         test_dns_label_unescape();
 686         test_dns_label_unescape_suffix();
 687         test_dns_label_escape();
 688         test_dns_name_normalize();
 689         test_dns_name_equal();
 690         test_dns_name_endswith();
 691         test_dns_name_startswith();
 692         test_dns_name_between();
 693         test_dns_name_is_root();
 694         test_dns_name_is_single_label();
 695         test_dns_name_reverse();
 696         test_dns_name_concat();
 697         test_dns_name_is_valid();
 698         test_dns_name_to_wire_format();
 699         test_dns_service_name_is_valid();
 700         test_dns_srv_type_is_valid();
 701         test_dns_service_join();
 702         test_dns_service_split();
 703         test_dns_name_change_suffix();
 704         test_dns_name_suffix();
 705         test_dns_name_count_labels();
 706         test_dns_name_equal_skip();
 707         test_dns_name_compare_func();
 708         test_dns_name_common_suffix();
 709         test_dns_name_apply_idna();
 710         test_dns_name_is_valid_or_address();
 711
 712         return 0;
 713 }