src/test/test-socket-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <sys/types.h>
   4 #include <unistd.h>
   5 #include <grp.h>
   6
   7 #include "alloc-util.h"
   8 #include "async.h"
   9 #include "escape.h"
  10 #include "exit-status.h"
  11 #include "fd-util.h"
  12 #include "in-addr-util.h"
  13 #include "io-util.h"
  14 #include "log.h"
  15 #include "macro.h"
  16 #include "missing_network.h"
  17 #include "process-util.h"
  18 #include "socket-util.h"
  19 #include "string-util.h"
  20 #include "tests.h"
  21 #include "tmpfile-util.h"
  22 #include "util.h"
  23
  24 static void test_ifname_valid(void) {
  25         log_info("/* %s */", __func__);
  26
  27         assert(ifname_valid("foo"));
  28         assert(ifname_valid("eth0"));
  29
  30         assert(!ifname_valid("0"));
  31         assert(!ifname_valid("99"));
  32         assert(ifname_valid("a99"));
  33         assert(ifname_valid("99a"));
  34
  35         assert(!ifname_valid(NULL));
  36         assert(!ifname_valid(""));
  37         assert(!ifname_valid(" "));
  38         assert(!ifname_valid(" foo"));
  39         assert(!ifname_valid("bar\n"));
  40         assert(!ifname_valid("."));
  41         assert(!ifname_valid(".."));
  42         assert(ifname_valid("foo.bar"));
  43         assert(!ifname_valid("x:y"));
  44
  45         assert(ifname_valid("xxxxxxxxxxxxxxx"));
  46         assert(!ifname_valid("xxxxxxxxxxxxxxxx"));
  47 }
  48
  49 static void test_socket_address_parse_one(const char *in, int ret, int family, const char *expected) {
  50         SocketAddress a;
  51         _cleanup_free_ char *out = NULL;
  52         int r;
  53
  54         r = socket_address_parse(&a, in);
  55         if (r >= 0)
  56                 assert_se(socket_address_print(&a, &out) >= 0);
  57
  58         log_info("\"%s\" → %s → \"%s\" (expect \"%s\")", in,
  59                  r >= 0 ? "✓" : "✗", empty_to_dash(out), r >= 0 ? expected ?: in : "-");
  60         assert_se(r == ret);
  61         if (r >= 0) {
  62                 assert_se(a.sockaddr.sa.sa_family == family);
  63                 assert_se(streq(out, expected ?: in));
  64         }
  65 }
  66
  67 #define SUN_PATH_LEN (sizeof(((struct sockaddr_un){}).sun_path))
  68 assert_cc(sizeof(((struct sockaddr_un){}).sun_path) == 108);
  69
  70 static void test_socket_address_parse(void) {
  71         log_info("/* %s */", __func__);
  72
  73         test_socket_address_parse_one("junk", -EINVAL, 0, NULL);
  74         test_socket_address_parse_one("192.168.1.1", -EINVAL, 0, NULL);
  75         test_socket_address_parse_one(".168.1.1", -EINVAL, 0, NULL);
  76         test_socket_address_parse_one("989.168.1.1", -EINVAL, 0, NULL);
  77         test_socket_address_parse_one("192.168.1.1:65536", -ERANGE, 0, NULL);
  78         test_socket_address_parse_one("192.168.1.1:0", -EINVAL, 0, NULL);
  79         test_socket_address_parse_one("0", -EINVAL, 0, NULL);
  80         test_socket_address_parse_one("65536", -ERANGE, 0, NULL);
  81
  82         const int default_family = socket_ipv6_is_supported() ? AF_INET6 : AF_INET;
  83
  84         test_socket_address_parse_one("65535", 0, default_family, "[::]:65535");
  85
  86         /* The checks below will pass even if ipv6 is disabled in
  87          * kernel. The underlying glibc's inet_pton() is just a string
  88          * parser and doesn't make any syscalls. */
  89
  90         test_socket_address_parse_one("[::1]", -EINVAL, 0, NULL);
  91         test_socket_address_parse_one("[::1]8888", -EINVAL, 0, NULL);
  92         test_socket_address_parse_one("::1", -EINVAL, 0, NULL);
  93         test_socket_address_parse_one("[::1]:0", -EINVAL, 0, NULL);
  94         test_socket_address_parse_one("[::1]:65536", -ERANGE, 0, NULL);
  95         test_socket_address_parse_one("[a:b:1]:8888", -EINVAL, 0, NULL);
  96
  97         test_socket_address_parse_one("8888", 0, default_family, "[::]:8888");
  98         test_socket_address_parse_one("[2001:0db8:0000:85a3:0000:0000:ac1f:8001]:8888", 0, AF_INET6,
  99                                       "[2001:db8:0:85a3::ac1f:8001]:8888");
 100         test_socket_address_parse_one("[::1]:8888", 0, AF_INET6, NULL);
 101         test_socket_address_parse_one("192.168.1.254:8888", 0, AF_INET, NULL);
 102         test_socket_address_parse_one("/foo/bar", 0, AF_UNIX, NULL);
 103         test_socket_address_parse_one("/", 0, AF_UNIX, NULL);
 104         test_socket_address_parse_one("@abstract", 0, AF_UNIX, NULL);
 105
 106         {
 107                 char aaa[SUN_PATH_LEN + 1] = "@";
 108
 109                 memset(aaa + 1, 'a', SUN_PATH_LEN - 1);
 110                 char_array_0(aaa);
 111
 112                 test_socket_address_parse_one(aaa, -EINVAL, 0, NULL);
 113
 114                 aaa[SUN_PATH_LEN - 1] = '\0';
 115                 test_socket_address_parse_one(aaa, 0, AF_UNIX, NULL);
 116         }
 117
 118         test_socket_address_parse_one("vsock:2:1234", 0, AF_VSOCK, NULL);
 119         test_socket_address_parse_one("vsock::1234", 0, AF_VSOCK, NULL);
 120         test_socket_address_parse_one("vsock:2:1234x", -EINVAL, 0, NULL);
 121         test_socket_address_parse_one("vsock:2x:1234", -EINVAL, 0, NULL);
 122         test_socket_address_parse_one("vsock:2", -EINVAL, 0, NULL);
 123 }
 124
 125 static void test_socket_print_unix_one(const char *in, size_t len_in, const char *expected) {
 126         _cleanup_free_ char *out = NULL, *c = NULL;
 127
 128         SocketAddress a = { .sockaddr = { .un = { .sun_family = AF_UNIX } },
 129                             .size = offsetof(struct sockaddr_un, sun_path) + len_in,
 130                             .type = SOCK_STREAM,
 131         };
 132         memcpy(a.sockaddr.un.sun_path, in, len_in);
 133
 134         assert_se(socket_address_print(&a, &out) >= 0);
 135         assert_se(c = cescape(in));
 136         log_info("\"%s\" → \"%s\" (expect \"%s\")", in, out, expected);
 137         assert_se(streq(out, expected));
 138 }
 139
 140 static void test_socket_print_unix(void) {
 141         log_info("/* %s */", __func__);
 142
 143         /* Some additional tests for abstract addresses which we don't parse */
 144
 145         test_socket_print_unix_one("\0\0\0\0", 4, "@\\000\\000\\000");
 146         test_socket_print_unix_one("@abs", 5, "@abs");
 147         test_socket_print_unix_one("\n", 2, "\\n");
 148         test_socket_print_unix_one("", 1, "<unnamed>");
 149         test_socket_print_unix_one("\0", 1, "<unnamed>");
 150         test_socket_print_unix_one("\0_________________________there's 108 characters in this string_____________________________________________", 108,
 151                                    "@_________________________there\\'s 108 characters in this string_____________________________________________");
 152         test_socket_print_unix_one("////////////////////////////////////////////////////////////////////////////////////////////////////////////", 108,
 153                                    "////////////////////////////////////////////////////////////////////////////////////////////////////////////");
 154         test_socket_print_unix_one("////////////////////////////////////////////////////////////////////////////////////////////////////////////", 109,
 155                                    "////////////////////////////////////////////////////////////////////////////////////////////////////////////");
 156         test_socket_print_unix_one("\0\a\b\n\255", 6, "@\\a\\b\\n\\255\\000");
 157 }
 158
 159 static void test_socket_address_parse_netlink(void) {
 160         SocketAddress a;
 161
 162         log_info("/* %s */", __func__);
 163
 164         assert_se(socket_address_parse_netlink(&a, "junk") < 0);
 165         assert_se(socket_address_parse_netlink(&a, "") < 0);
 166
 167         assert_se(socket_address_parse_netlink(&a, "route") >= 0);
 168         assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
 169         assert_se(a.sockaddr.nl.nl_groups == 0);
 170         assert_se(a.protocol == NETLINK_ROUTE);
 171         assert_se(socket_address_parse_netlink(&a, "route") >= 0);
 172         assert_se(socket_address_parse_netlink(&a, "route 10") >= 0);
 173         assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
 174         assert_se(a.sockaddr.nl.nl_groups == 10);
 175         assert_se(a.protocol == NETLINK_ROUTE);
 176
 177         /* With spaces and tabs */
 178         assert_se(socket_address_parse_netlink(&a, " kobject-uevent ") >= 0);
 179         assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
 180         assert_se(a.sockaddr.nl.nl_groups == 0);
 181         assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
 182         assert_se(socket_address_parse_netlink(&a, " \t kobject-uevent \t 10") >= 0);
 183         assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
 184         assert_se(a.sockaddr.nl.nl_groups == 10);
 185         assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
 186         assert_se(socket_address_parse_netlink(&a, "kobject-uevent\t10") >= 0);
 187         assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
 188         assert_se(a.sockaddr.nl.nl_groups == 10);
 189         assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
 190
 191         /* trailing space is not supported */
 192         assert_se(socket_address_parse_netlink(&a, "kobject-uevent\t10 ") < 0);
 193
 194         /* Group must be unsigned */
 195         assert_se(socket_address_parse_netlink(&a, "kobject-uevent -1") < 0);
 196
 197         /* oss-fuzz #6884 */
 198         assert_se(socket_address_parse_netlink(&a, "\xff") < 0);
 199 }
 200
 201 static void test_socket_address_equal(void) {
 202         SocketAddress a, b;
 203
 204         log_info("/* %s */", __func__);
 205
 206         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 207         assert_se(socket_address_parse(&b, "192.168.1.1:888") >= 0);
 208         assert_se(!socket_address_equal(&a, &b));
 209
 210         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 211         assert_se(socket_address_parse(&b, "192.16.1.1:8888") >= 0);
 212         assert_se(!socket_address_equal(&a, &b));
 213
 214         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 215         assert_se(socket_address_parse(&b, "8888") >= 0);
 216         assert_se(!socket_address_equal(&a, &b));
 217
 218         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 219         assert_se(socket_address_parse(&b, "/foo/bar/") >= 0);
 220         assert_se(!socket_address_equal(&a, &b));
 221
 222         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 223         assert_se(socket_address_parse(&b, "192.168.1.1:8888") >= 0);
 224         assert_se(socket_address_equal(&a, &b));
 225
 226         assert_se(socket_address_parse(&a, "/foo/bar") >= 0);
 227         assert_se(socket_address_parse(&b, "/foo/bar") >= 0);
 228         assert_se(socket_address_equal(&a, &b));
 229
 230         assert_se(socket_address_parse(&a, "[::1]:8888") >= 0);
 231         assert_se(socket_address_parse(&b, "[::1]:8888") >= 0);
 232         assert_se(socket_address_equal(&a, &b));
 233
 234         assert_se(socket_address_parse(&a, "@abstract") >= 0);
 235         assert_se(socket_address_parse(&b, "@abstract") >= 0);
 236         assert_se(socket_address_equal(&a, &b));
 237
 238         assert_se(socket_address_parse_netlink(&a, "firewall") >= 0);
 239         assert_se(socket_address_parse_netlink(&b, "firewall") >= 0);
 240         assert_se(socket_address_equal(&a, &b));
 241
 242         assert_se(socket_address_parse(&a, "vsock:2:1234") >= 0);
 243         assert_se(socket_address_parse(&b, "vsock:2:1234") >= 0);
 244         assert_se(socket_address_equal(&a, &b));
 245         assert_se(socket_address_parse(&b, "vsock:2:1235") >= 0);
 246         assert_se(!socket_address_equal(&a, &b));
 247         assert_se(socket_address_parse(&b, "vsock:3:1234") >= 0);
 248         assert_se(!socket_address_equal(&a, &b));
 249 }
 250
 251 static void test_socket_address_get_path(void) {
 252         SocketAddress a;
 253
 254         log_info("/* %s */", __func__);
 255
 256         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 257         assert_se(!socket_address_get_path(&a));
 258
 259         assert_se(socket_address_parse(&a, "@abstract") >= 0);
 260         assert_se(!socket_address_get_path(&a));
 261
 262         assert_se(socket_address_parse(&a, "[::1]:8888") >= 0);
 263         assert_se(!socket_address_get_path(&a));
 264
 265         assert_se(socket_address_parse(&a, "/foo/bar") >= 0);
 266         assert_se(streq(socket_address_get_path(&a), "/foo/bar"));
 267
 268         assert_se(socket_address_parse(&a, "vsock:2:1234") >= 0);
 269         assert_se(!socket_address_get_path(&a));
 270 }
 271
 272 static void test_socket_address_is(void) {
 273         SocketAddress a;
 274
 275         log_info("/* %s */", __func__);
 276
 277         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 278         assert_se(socket_address_is(&a, "192.168.1.1:8888", SOCK_STREAM));
 279         assert_se(!socket_address_is(&a, "route", SOCK_STREAM));
 280         assert_se(!socket_address_is(&a, "192.168.1.1:8888", SOCK_RAW));
 281 }
 282
 283 static void test_socket_address_is_netlink(void) {
 284         SocketAddress a;
 285
 286         log_info("/* %s */", __func__);
 287
 288         assert_se(socket_address_parse_netlink(&a, "route 10") >= 0);
 289         assert_se(socket_address_is_netlink(&a, "route 10"));
 290         assert_se(!socket_address_is_netlink(&a, "192.168.1.1:8888"));
 291         assert_se(!socket_address_is_netlink(&a, "route 1"));
 292 }
 293
 294 static void test_in_addr_is_null(void) {
 295         union in_addr_union i = {};
 296
 297         log_info("/* %s */", __func__);
 298
 299         assert_se(in_addr_is_null(AF_INET, &i) == true);
 300         assert_se(in_addr_is_null(AF_INET6, &i) == true);
 301
 302         i.in.s_addr = 0x1000000;
 303         assert_se(in_addr_is_null(AF_INET, &i) == false);
 304         assert_se(in_addr_is_null(AF_INET6, &i) == false);
 305
 306         assert_se(in_addr_is_null(-1, &i) == -EAFNOSUPPORT);
 307 }
 308
 309 static void test_in_addr_prefix_intersect_one(unsigned f, const char *a, unsigned apl, const char *b, unsigned bpl, int result) {
 310         union in_addr_union ua, ub;
 311
 312         assert_se(in_addr_from_string(f, a, &ua) >= 0);
 313         assert_se(in_addr_from_string(f, b, &ub) >= 0);
 314
 315         assert_se(in_addr_prefix_intersect(f, &ua, apl, &ub, bpl) == result);
 316 }
 317
 318 static void test_in_addr_prefix_intersect(void) {
 319         log_info("/* %s */", __func__);
 320
 321         test_in_addr_prefix_intersect_one(AF_INET, "255.255.255.255", 32, "255.255.255.254", 32, 0);
 322         test_in_addr_prefix_intersect_one(AF_INET, "255.255.255.255", 0, "255.255.255.255", 32, 1);
 323         test_in_addr_prefix_intersect_one(AF_INET, "0.0.0.0", 0, "47.11.8.15", 32, 1);
 324
 325         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.1", 24, 1);
 326         test_in_addr_prefix_intersect_one(AF_INET, "2.2.2.2", 24, "1.1.1.1", 24, 0);
 327
 328         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.127", 25, 1);
 329         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.127", 26, 1);
 330         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 25, "1.1.1.127", 25, 1);
 331         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 25, "1.1.1.255", 25, 0);
 332
 333         test_in_addr_prefix_intersect_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", 128, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe", 128, 0);
 334         test_in_addr_prefix_intersect_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", 0, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", 128, 1);
 335         test_in_addr_prefix_intersect_one(AF_INET6, "::", 0, "beef:beef:beef:beef:beef:beef:beef:beef", 128, 1);
 336
 337         test_in_addr_prefix_intersect_one(AF_INET6, "1::2", 64, "1::2", 64, 1);
 338         test_in_addr_prefix_intersect_one(AF_INET6, "2::2", 64, "1::2", 64, 0);
 339
 340         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 120, "1::007f", 121, 1);
 341         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 120, "1::007f", 122, 1);
 342         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 121, "1::007f", 121, 1);
 343         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 121, "1::00ff", 121, 0);
 344 }
 345
 346 static void test_in_addr_prefix_next_one(unsigned f, const char *before, unsigned pl, const char *after) {
 347         union in_addr_union ubefore, uafter, t;
 348
 349         assert_se(in_addr_from_string(f, before, &ubefore) >= 0);
 350
 351         t = ubefore;
 352         assert_se((in_addr_prefix_next(f, &t, pl) > 0) == !!after);
 353
 354         if (after) {
 355                 assert_se(in_addr_from_string(f, after, &uafter) >= 0);
 356                 assert_se(in_addr_equal(f, &t, &uafter) > 0);
 357         }
 358 }
 359
 360 static void test_in_addr_prefix_next(void) {
 361         log_info("/* %s */", __func__);
 362
 363         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 24, "192.168.1.0");
 364         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 16, "192.169.0.0");
 365         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 20, "192.168.16.0");
 366
 367         test_in_addr_prefix_next_one(AF_INET, "0.0.0.0", 32, "0.0.0.1");
 368         test_in_addr_prefix_next_one(AF_INET, "255.255.255.255", 32, NULL);
 369         test_in_addr_prefix_next_one(AF_INET, "255.255.255.0", 24, NULL);
 370
 371         test_in_addr_prefix_next_one(AF_INET6, "4400::", 128, "4400::0001");
 372         test_in_addr_prefix_next_one(AF_INET6, "4400::", 120, "4400::0100");
 373         test_in_addr_prefix_next_one(AF_INET6, "4400::", 127, "4400::0002");
 374         test_in_addr_prefix_next_one(AF_INET6, "4400::", 8, "4500::");
 375         test_in_addr_prefix_next_one(AF_INET6, "4400::", 7, "4600::");
 376
 377         test_in_addr_prefix_next_one(AF_INET6, "::", 128, "::1");
 378
 379         test_in_addr_prefix_next_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", 128, NULL);
 380         test_in_addr_prefix_next_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00", 120, NULL);
 381 }
 382
 383 static void test_in_addr_to_string_one(int f, const char *addr) {
 384         union in_addr_union ua;
 385         _cleanup_free_ char *r = NULL;
 386
 387         assert_se(in_addr_from_string(f, addr, &ua) >= 0);
 388         assert_se(in_addr_to_string(f, &ua, &r) >= 0);
 389         printf("test_in_addr_to_string_one: %s == %s\n", addr, r);
 390         assert_se(streq(addr, r));
 391 }
 392
 393 static void test_in_addr_to_string(void) {
 394         log_info("/* %s */", __func__);
 395
 396         test_in_addr_to_string_one(AF_INET, "192.168.0.1");
 397         test_in_addr_to_string_one(AF_INET, "10.11.12.13");
 398         test_in_addr_to_string_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff");
 399         test_in_addr_to_string_one(AF_INET6, "::1");
 400         test_in_addr_to_string_one(AF_INET6, "fe80::");
 401 }
 402
 403 static void test_in_addr_ifindex_to_string_one(int f, const char *a, int ifindex, const char *b) {
 404         _cleanup_free_ char *r = NULL;
 405         union in_addr_union ua, uuaa;
 406         int ff, ifindex2;
 407
 408         assert_se(in_addr_from_string(f, a, &ua) >= 0);
 409         assert_se(in_addr_ifindex_to_string(f, &ua, ifindex, &r) >= 0);
 410         printf("test_in_addr_ifindex_to_string_one: %s == %s\n", b, r);
 411         assert_se(streq(b, r));
 412
 413         assert_se(in_addr_ifindex_from_string_auto(b, &ff, &uuaa, &ifindex2) >= 0);
 414         assert_se(ff == f);
 415         assert_se(in_addr_equal(f, &ua, &uuaa));
 416         assert_se(ifindex2 == ifindex || ifindex2 == 0);
 417 }
 418
 419 static void test_in_addr_ifindex_to_string(void) {
 420         log_info("/* %s */", __func__);
 421
 422         test_in_addr_ifindex_to_string_one(AF_INET, "192.168.0.1", 7, "192.168.0.1");
 423         test_in_addr_ifindex_to_string_one(AF_INET, "10.11.12.13", 9, "10.11.12.13");
 424         test_in_addr_ifindex_to_string_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", 10, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff");
 425         test_in_addr_ifindex_to_string_one(AF_INET6, "::1", 11, "::1");
 426         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::", 12, "fe80::%12");
 427         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::", 0, "fe80::");
 428         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::14", 12, "fe80::14%12");
 429         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::15", -7, "fe80::15");
 430         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::16", LOOPBACK_IFINDEX, "fe80::16%1");
 431 }
 432
 433 static void test_in_addr_ifindex_from_string_auto(void) {
 434         int family, ifindex;
 435         union in_addr_union ua;
 436
 437         log_info("/* %s */", __func__);
 438         /* Most in_addr_ifindex_from_string_auto() invocations have already been tested above, but let's test some more */
 439
 440         assert_se(in_addr_ifindex_from_string_auto("fe80::17", &family, &ua, &ifindex) >= 0);
 441         assert_se(family == AF_INET6);
 442         assert_se(ifindex == 0);
 443
 444         assert_se(in_addr_ifindex_from_string_auto("fe80::18%19", &family, &ua, &ifindex) >= 0);
 445         assert_se(family == AF_INET6);
 446         assert_se(ifindex == 19);
 447
 448         assert_se(in_addr_ifindex_from_string_auto("fe80::18%lo", &family, &ua, &ifindex) >= 0);
 449         assert_se(family == AF_INET6);
 450         assert_se(ifindex == LOOPBACK_IFINDEX);
 451
 452         assert_se(in_addr_ifindex_from_string_auto("fe80::19%thisinterfacecantexist", &family, &ua, &ifindex) == -ENODEV);
 453 }
 454
 455 static void test_sockaddr_equal(void) {
 456         union sockaddr_union a = {
 457                 .in.sin_family = AF_INET,
 458                 .in.sin_port = 0,
 459                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
 460         };
 461         union sockaddr_union b = {
 462                 .in.sin_family = AF_INET,
 463                 .in.sin_port = 0,
 464                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
 465         };
 466         union sockaddr_union c = {
 467                 .in.sin_family = AF_INET,
 468                 .in.sin_port = 0,
 469                 .in.sin_addr.s_addr = htobe32(1234),
 470         };
 471         union sockaddr_union d = {
 472                 .in6.sin6_family = AF_INET6,
 473                 .in6.sin6_port = 0,
 474                 .in6.sin6_addr = IN6ADDR_ANY_INIT,
 475         };
 476         union sockaddr_union e = {
 477                 .vm.svm_family = AF_VSOCK,
 478                 .vm.svm_port = 0,
 479                 .vm.svm_cid = VMADDR_CID_ANY,
 480         };
 481
 482         log_info("/* %s */", __func__);
 483
 484         assert_se(sockaddr_equal(&a, &a));
 485         assert_se(sockaddr_equal(&a, &b));
 486         assert_se(sockaddr_equal(&d, &d));
 487         assert_se(sockaddr_equal(&e, &e));
 488         assert_se(!sockaddr_equal(&a, &c));
 489         assert_se(!sockaddr_equal(&b, &c));
 490         assert_se(!sockaddr_equal(&a, &e));
 491 }
 492
 493 static void test_sockaddr_un_len(void) {
 494         log_info("/* %s */", __func__);
 495
 496         static const struct sockaddr_un fs = {
 497                 .sun_family = AF_UNIX,
 498                 .sun_path = "/foo/bar/waldo",
 499         };
 500
 501         static const struct sockaddr_un abstract = {
 502                 .sun_family = AF_UNIX,
 503                 .sun_path = "\0foobar",
 504         };
 505
 506         assert_se(SOCKADDR_UN_LEN(fs) == offsetof(struct sockaddr_un, sun_path) + strlen(fs.sun_path) + 1);
 507         assert_se(SOCKADDR_UN_LEN(abstract) == offsetof(struct sockaddr_un, sun_path) + 1 + strlen(abstract.sun_path + 1));
 508 }
 509
 510 static void test_in_addr_is_multicast(void) {
 511         union in_addr_union a, b;
 512         int f;
 513
 514         log_info("/* %s */", __func__);
 515
 516         assert_se(in_addr_from_string_auto("192.168.3.11", &f, &a) >= 0);
 517         assert_se(in_addr_is_multicast(f, &a) == 0);
 518
 519         assert_se(in_addr_from_string_auto("224.0.0.1", &f, &a) >= 0);
 520         assert_se(in_addr_is_multicast(f, &a) == 1);
 521
 522         assert_se(in_addr_from_string_auto("FF01:0:0:0:0:0:0:1", &f, &b) >= 0);
 523         assert_se(in_addr_is_multicast(f, &b) == 1);
 524
 525         assert_se(in_addr_from_string_auto("2001:db8::c:69b:aeff:fe53:743e", &f, &b) >= 0);
 526         assert_se(in_addr_is_multicast(f, &b) == 0);
 527 }
 528
 529 static void test_getpeercred_getpeergroups(void) {
 530         int r;
 531
 532         log_info("/* %s */", __func__);
 533
 534         r = safe_fork("(getpeercred)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 535         assert_se(r >= 0);
 536
 537         if (r == 0) {
 538                 static const gid_t gids[] = { 3, 4, 5, 6, 7 };
 539                 gid_t *test_gids;
 540                 size_t n_test_gids;
 541                 uid_t test_uid;
 542                 gid_t test_gid;
 543                 struct ucred ucred;
 544                 int pair[2];
 545
 546                 if (geteuid() == 0) {
 547                         test_uid = 1;
 548                         test_gid = 2;
 549                         test_gids = (gid_t*) gids;
 550                         n_test_gids = ELEMENTSOF(gids);
 551
 552                         assert_se(setgroups(n_test_gids, test_gids) >= 0);
 553                         assert_se(setresgid(test_gid, test_gid, test_gid) >= 0);
 554                         assert_se(setresuid(test_uid, test_uid, test_uid) >= 0);
 555
 556                 } else {
 557                         long ngroups_max;
 558
 559                         test_uid = getuid();
 560                         test_gid = getgid();
 561
 562                         ngroups_max = sysconf(_SC_NGROUPS_MAX);
 563                         assert(ngroups_max > 0);
 564
 565                         test_gids = newa(gid_t, ngroups_max);
 566
 567                         r = getgroups(ngroups_max, test_gids);
 568                         assert_se(r >= 0);
 569                         n_test_gids = (size_t) r;
 570                 }
 571
 572                 assert_se(socketpair(AF_UNIX, SOCK_STREAM, 0, pair) >= 0);
 573
 574                 assert_se(getpeercred(pair[0], &ucred) >= 0);
 575
 576                 assert_se(ucred.uid == test_uid);
 577                 assert_se(ucred.gid == test_gid);
 578                 assert_se(ucred.pid == getpid_cached());
 579
 580                 {
 581                         _cleanup_free_ gid_t *peer_groups = NULL;
 582
 583                         r = getpeergroups(pair[0], &peer_groups);
 584                         assert_se(r >= 0 || IN_SET(r, -EOPNOTSUPP, -ENOPROTOOPT));
 585
 586                         if (r >= 0) {
 587                                 assert_se((size_t) r == n_test_gids);
 588                                 assert_se(memcmp(peer_groups, test_gids, sizeof(gid_t) * n_test_gids) == 0);
 589                         }
 590                 }
 591
 592                 safe_close_pair(pair);
 593                 _exit(EXIT_SUCCESS);
 594         }
 595 }
 596
 597 static void test_passfd_read(void) {
 598         static const char file_contents[] = "test contents for passfd";
 599         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 600         int r;
 601
 602         log_info("/* %s */", __func__);
 603
 604         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 605
 606         r = safe_fork("(passfd_read)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 607         assert_se(r >= 0);
 608
 609         if (r == 0) {
 610                 /* Child */
 611                 char tmpfile[] = "/tmp/test-socket-util-passfd-read-XXXXXX";
 612                 _cleanup_close_ int tmpfd = -1;
 613
 614                 pair[0] = safe_close(pair[0]);
 615
 616                 tmpfd = mkostemp_safe(tmpfile);
 617                 assert_se(tmpfd >= 0);
 618                 assert_se(write(tmpfd, file_contents, strlen(file_contents)) == (ssize_t) strlen(file_contents));
 619                 tmpfd = safe_close(tmpfd);
 620
 621                 tmpfd = open(tmpfile, O_RDONLY);
 622                 assert_se(tmpfd >= 0);
 623                 assert_se(unlink(tmpfile) == 0);
 624
 625                 assert_se(send_one_fd(pair[1], tmpfd, MSG_DONTWAIT) == 0);
 626                 _exit(EXIT_SUCCESS);
 627         }
 628
 629         /* Parent */
 630         char buf[64];
 631         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 632         _cleanup_close_ int fd = -1;
 633
 634         pair[1] = safe_close(pair[1]);
 635
 636         assert_se(receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd) == 0);
 637
 638         assert_se(fd >= 0);
 639         r = read(fd, buf, sizeof(buf)-1);
 640         assert_se(r >= 0);
 641         buf[r] = 0;
 642         assert_se(streq(buf, file_contents));
 643 }
 644
 645 static void test_passfd_contents_read(void) {
 646         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 647         static const char file_contents[] = "test contents in the file";
 648         static const char wire_contents[] = "test contents on the wire";
 649         int r;
 650
 651         log_info("/* %s */", __func__);
 652
 653         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 654
 655         r = safe_fork("(passfd_contents_read)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 656         assert_se(r >= 0);
 657
 658         if (r == 0) {
 659                 /* Child */
 660                 struct iovec iov = IOVEC_INIT_STRING(wire_contents);
 661                 char tmpfile[] = "/tmp/test-socket-util-passfd-contents-read-XXXXXX";
 662                 _cleanup_close_ int tmpfd = -1;
 663
 664                 pair[0] = safe_close(pair[0]);
 665
 666                 tmpfd = mkostemp_safe(tmpfile);
 667                 assert_se(tmpfd >= 0);
 668                 assert_se(write(tmpfd, file_contents, strlen(file_contents)) == (ssize_t) strlen(file_contents));
 669                 tmpfd = safe_close(tmpfd);
 670
 671                 tmpfd = open(tmpfile, O_RDONLY);
 672                 assert_se(tmpfd >= 0);
 673                 assert_se(unlink(tmpfile) == 0);
 674
 675                 assert_se(send_one_fd_iov(pair[1], tmpfd, &iov, 1, MSG_DONTWAIT) > 0);
 676                 _exit(EXIT_SUCCESS);
 677         }
 678
 679         /* Parent */
 680         char buf[64];
 681         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 682         _cleanup_close_ int fd = -1;
 683         ssize_t k;
 684
 685         pair[1] = safe_close(pair[1]);
 686
 687         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 688         assert_se(k > 0);
 689         buf[k] = 0;
 690         assert_se(streq(buf, wire_contents));
 691
 692         assert_se(fd >= 0);
 693         r = read(fd, buf, sizeof(buf)-1);
 694         assert_se(r >= 0);
 695         buf[r] = 0;
 696         assert_se(streq(buf, file_contents));
 697 }
 698
 699 static void test_receive_nopassfd(void) {
 700         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 701         static const char wire_contents[] = "no fd passed here";
 702         int r;
 703
 704         log_info("/* %s */", __func__);
 705
 706         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 707
 708         r = safe_fork("(receive_nopassfd)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 709         assert_se(r >= 0);
 710
 711         if (r == 0) {
 712                 /* Child */
 713                 struct iovec iov = IOVEC_INIT_STRING(wire_contents);
 714
 715                 pair[0] = safe_close(pair[0]);
 716
 717                 assert_se(send_one_fd_iov(pair[1], -1, &iov, 1, MSG_DONTWAIT) > 0);
 718                 _exit(EXIT_SUCCESS);
 719         }
 720
 721         /* Parent */
 722         char buf[64];
 723         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 724         int fd = -999;
 725         ssize_t k;
 726
 727         pair[1] = safe_close(pair[1]);
 728
 729         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 730         assert_se(k > 0);
 731         buf[k] = 0;
 732         assert_se(streq(buf, wire_contents));
 733
 734         /* no fd passed here, confirm it was reset */
 735         assert_se(fd == -1);
 736 }
 737
 738 static void test_send_nodata_nofd(void) {
 739         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 740         int r;
 741
 742         log_info("/* %s */", __func__);
 743
 744         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 745
 746         r = safe_fork("(send_nodata_nofd)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 747         assert_se(r >= 0);
 748
 749         if (r == 0) {
 750                 /* Child */
 751                 pair[0] = safe_close(pair[0]);
 752
 753                 assert_se(send_one_fd_iov(pair[1], -1, NULL, 0, MSG_DONTWAIT) == -EINVAL);
 754                 _exit(EXIT_SUCCESS);
 755         }
 756
 757         /* Parent */
 758         char buf[64];
 759         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 760         int fd = -999;
 761         ssize_t k;
 762
 763         pair[1] = safe_close(pair[1]);
 764
 765         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 766         /* recvmsg() will return errno EAGAIN if nothing was sent */
 767         assert_se(k == -EAGAIN);
 768
 769         /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */
 770         assert_se(fd == -999);
 771 }
 772
 773 static void test_send_emptydata(void) {
 774         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 775         int r;
 776
 777         log_info("/* %s */", __func__);
 778
 779         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 780
 781         r = safe_fork("(send_emptydata)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 782         assert_se(r >= 0);
 783
 784         if (r == 0) {
 785                 /* Child */
 786                 struct iovec iov = IOVEC_INIT_STRING("");  /* zero-length iov */
 787                 assert_se(iov.iov_len == 0);
 788
 789                 pair[0] = safe_close(pair[0]);
 790
 791                 /* This will succeed, since iov is set. */
 792                 assert_se(send_one_fd_iov(pair[1], -1, &iov, 1, MSG_DONTWAIT) == 0);
 793                 _exit(EXIT_SUCCESS);
 794         }
 795
 796         /* Parent */
 797         char buf[64];
 798         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 799         int fd = -999;
 800         ssize_t k;
 801
 802         pair[1] = safe_close(pair[1]);
 803
 804         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 805         /* receive_one_fd_iov() returns -EIO if an fd is not found and no data was returned. */
 806         assert_se(k == -EIO);
 807
 808         /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */
 809         assert_se(fd == -999);
 810 }
 811
 812 int main(int argc, char *argv[]) {
 813         test_setup_logging(LOG_DEBUG);
 814
 815         test_ifname_valid();
 816
 817         test_socket_address_parse();
 818         test_socket_print_unix();
 819         test_socket_address_parse_netlink();
 820         test_socket_address_equal();
 821         test_socket_address_get_path();
 822         test_socket_address_is();
 823         test_socket_address_is_netlink();
 824
 825         test_in_addr_is_null();
 826         test_in_addr_prefix_intersect();
 827         test_in_addr_prefix_next();
 828         test_in_addr_to_string();
 829         test_in_addr_ifindex_to_string();
 830         test_in_addr_ifindex_from_string_auto();
 831
 832         test_sockaddr_equal();
 833
 834         test_sockaddr_un_len();
 835
 836         test_in_addr_is_multicast();
 837
 838         test_getpeercred_getpeergroups();
 839
 840         test_passfd_read();
 841         test_passfd_contents_read();
 842         test_receive_nopassfd();
 843         test_send_nodata_nofd();
 844         test_send_emptydata();
 845
 846         return 0;
 847 }