src/test/test-socket-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <fcntl.h>
   4 #include <grp.h>
   5 #include <unistd.h>
   6
   7 #include "alloc-util.h"
   8 #include "escape.h"
   9 #include "fd-util.h"
  10 #include "fs-util.h"
  11 #include "in-addr-util.h"
  12 #include "iovec-util.h"
  13 #include "log.h"
  14 #include "path-util.h"
  15 #include "pidref.h"
  16 #include "process-util.h"
  17 #include "random-util.h"
  18 #include "rm-rf.h"
  19 #include "socket-util.h"
  20 #include "tests.h"
  21 #include "tmpfile-util.h"
  22 #include "user-util.h"
  23
  24 assert_cc(SUN_PATH_LEN == 108);
  25
  26 TEST(ifname_valid) {
  27         assert_se( ifname_valid("foo"));
  28         assert_se( ifname_valid("eth0"));
  29
  30         assert_se(!ifname_valid("0"));
  31         assert_se(!ifname_valid("99"));
  32         assert_se( ifname_valid("a99"));
  33         assert_se( ifname_valid("99a"));
  34
  35         assert_se(!ifname_valid(NULL));
  36         assert_se(!ifname_valid(""));
  37         assert_se(!ifname_valid(" "));
  38         assert_se(!ifname_valid(" foo"));
  39         assert_se(!ifname_valid("bar\n"));
  40         assert_se(!ifname_valid("."));
  41         assert_se(!ifname_valid(".."));
  42         assert_se(ifname_valid("foo.bar"));
  43         assert_se(!ifname_valid("x:y"));
  44
  45         assert_se( ifname_valid_full("xxxxxxxxxxxxxxx", 0));
  46         assert_se(!ifname_valid_full("xxxxxxxxxxxxxxxx", 0));
  47         assert_se( ifname_valid_full("xxxxxxxxxxxxxxxx", IFNAME_VALID_ALTERNATIVE));
  48         assert_se( ifname_valid_full("xxxxxxxxxxxxxxxx", IFNAME_VALID_ALTERNATIVE));
  49         assert_se(!ifname_valid_full("999", IFNAME_VALID_ALTERNATIVE));
  50         assert_se( ifname_valid_full("999", IFNAME_VALID_ALTERNATIVE | IFNAME_VALID_NUMERIC));
  51         assert_se(!ifname_valid_full("0", IFNAME_VALID_ALTERNATIVE | IFNAME_VALID_NUMERIC));
  52 }
  53
  54 static void test_socket_print_unix_one(const char *in, size_t len_in, const char *expected) {
  55         _cleanup_free_ char *out = NULL, *c = NULL;
  56
  57         assert_se(len_in <= SUN_PATH_LEN);
  58         SocketAddress a = { .sockaddr = { .un = { .sun_family = AF_UNIX } },
  59                             .size = offsetof(struct sockaddr_un, sun_path) + len_in,
  60                             .type = SOCK_STREAM,
  61         };
  62         memcpy(a.sockaddr.un.sun_path, in, len_in);
  63
  64         assert_se(socket_address_print(&a, &out) >= 0);
  65         assert_se(c = cescape(in));
  66         log_info("\"%s\" → \"%s\" (expect \"%s\")", in, out, expected);
  67         ASSERT_STREQ(out, expected);
  68 }
  69
  70 TEST(socket_print_unix) {
  71         /* Some additional tests for abstract addresses which we don't parse */
  72
  73         test_socket_print_unix_one("\0\0\0\0", 4, "@\\000\\000\\000");
  74         test_socket_print_unix_one("@abs", 5, "@abs");
  75         test_socket_print_unix_one("\n", 2, "\\n");
  76         test_socket_print_unix_one("", 1, "<unnamed>");
  77         test_socket_print_unix_one("\0", 1, "<unnamed>");
  78         test_socket_print_unix_one("\0_________________________there's 108 characters in this string_____________________________________________", 108,
  79                                    "@_________________________there\\'s 108 characters in this string_____________________________________________");
  80         test_socket_print_unix_one("////////////////////////////////////////////////////////////////////////////////////////////////////////////", 108,
  81                                    "////////////////////////////////////////////////////////////////////////////////////////////////////////////");
  82         test_socket_print_unix_one("\0\a\b\n\255", 6, "@\\a\\b\\n\\255\\000");
  83 }
  84
  85 TEST(sockaddr_equal) {
  86         union sockaddr_union a = {
  87                 .in.sin_family = AF_INET,
  88                 .in.sin_port = 0,
  89                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
  90         };
  91         union sockaddr_union b = {
  92                 .in.sin_family = AF_INET,
  93                 .in.sin_port = 0,
  94                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
  95         };
  96         union sockaddr_union c = {
  97                 .in.sin_family = AF_INET,
  98                 .in.sin_port = 0,
  99                 .in.sin_addr.s_addr = htobe32(1234),
 100         };
 101         union sockaddr_union d = {
 102                 .in6.sin6_family = AF_INET6,
 103                 .in6.sin6_port = 0,
 104                 .in6.sin6_addr = IN6ADDR_ANY_INIT,
 105         };
 106         union sockaddr_union e = {
 107                 .vm.svm_family = AF_VSOCK,
 108                 .vm.svm_port = 0,
 109                 .vm.svm_cid = VMADDR_CID_ANY,
 110         };
 111
 112         assert_se(sockaddr_equal(&a, &a));
 113         assert_se(sockaddr_equal(&a, &b));
 114         assert_se(sockaddr_equal(&d, &d));
 115         assert_se(sockaddr_equal(&e, &e));
 116         assert_se(!sockaddr_equal(&a, &c));
 117         assert_se(!sockaddr_equal(&b, &c));
 118         assert_se(!sockaddr_equal(&a, &e));
 119 }
 120
 121 TEST(sockaddr_un_len) {
 122         static const struct sockaddr_un fs = {
 123                 .sun_family = AF_UNIX,
 124                 .sun_path = "/foo/bar/waldo",
 125         };
 126
 127         static const struct sockaddr_un abstract = {
 128                 .sun_family = AF_UNIX,
 129                 .sun_path = "\0foobar",
 130         };
 131
 132         assert_se(sockaddr_un_len(&fs) == offsetof(struct sockaddr_un, sun_path) + strlen(fs.sun_path) + 1);
 133         assert_se(sockaddr_un_len(&abstract) == offsetof(struct sockaddr_un, sun_path) + 1 + strlen(abstract.sun_path + 1));
 134 }
 135
 136 TEST(in_addr_is_multicast) {
 137         union in_addr_union a, b;
 138         int f;
 139
 140         assert_se(in_addr_from_string_auto("192.168.3.11", &f, &a) >= 0);
 141         assert_se(in_addr_is_multicast(f, &a) == 0);
 142
 143         assert_se(in_addr_from_string_auto("224.0.0.1", &f, &a) >= 0);
 144         assert_se(in_addr_is_multicast(f, &a) == 1);
 145
 146         assert_se(in_addr_from_string_auto("FF01:0:0:0:0:0:0:1", &f, &b) >= 0);
 147         assert_se(in_addr_is_multicast(f, &b) == 1);
 148
 149         assert_se(in_addr_from_string_auto("2001:db8::c:69b:aeff:fe53:743e", &f, &b) >= 0);
 150         assert_se(in_addr_is_multicast(f, &b) == 0);
 151 }
 152
 153 TEST(getpeercred_getpeergroups) {
 154         int r;
 155
 156         r = safe_fork("(getpeercred)", FORK_DEATHSIG_SIGTERM|FORK_LOG|FORK_WAIT, NULL);
 157         assert_se(r >= 0);
 158
 159         if (r == 0) {
 160                 static const gid_t gids[] = { 3, 4, 5, 6, 7 };
 161                 gid_t *test_gids;
 162                 size_t n_test_gids;
 163                 uid_t test_uid;
 164                 gid_t test_gid;
 165                 struct ucred ucred;
 166                 int pair[2] = EBADF_PAIR;
 167
 168                 if (geteuid() == 0 && !userns_has_single_user()) {
 169                         test_uid = 1;
 170                         test_gid = 2;
 171                         test_gids = (gid_t*) gids;
 172                         n_test_gids = ELEMENTSOF(gids);
 173
 174                         assert_se(fully_set_uid_gid(test_uid, test_gid, test_gids, n_test_gids) >= 0);
 175                 } else {
 176                         long ngroups_max;
 177
 178                         test_uid = getuid();
 179                         test_gid = getgid();
 180
 181                         ngroups_max = sysconf(_SC_NGROUPS_MAX);
 182                         assert_se(ngroups_max > 0);
 183
 184                         test_gids = newa(gid_t, ngroups_max);
 185
 186                         r = getgroups(ngroups_max, test_gids);
 187                         assert_se(r >= 0);
 188                         n_test_gids = (size_t) r;
 189                 }
 190
 191                 assert_se(socketpair(AF_UNIX, SOCK_STREAM, 0, pair) >= 0);
 192
 193                 assert_se(getpeercred(pair[0], &ucred) >= 0);
 194
 195                 assert_se(ucred.uid == test_uid);
 196                 assert_se(ucred.gid == test_gid);
 197                 assert_se(ucred.pid == getpid_cached());
 198
 199                 {
 200                         _cleanup_free_ gid_t *peer_groups = NULL;
 201
 202                         r = getpeergroups(pair[0], &peer_groups);
 203                         assert_se(r >= 0 || IN_SET(r, -EOPNOTSUPP, -ENOPROTOOPT));
 204
 205                         if (r >= 0) {
 206                                 assert_se((size_t) r == n_test_gids);
 207                                 assert_se(memcmp(peer_groups, test_gids, sizeof(gid_t) * n_test_gids) == 0);
 208                         }
 209                 }
 210
 211                 safe_close_pair(pair);
 212                 _exit(EXIT_SUCCESS);
 213         }
 214 }
 215
 216 TEST(passfd_read) {
 217         static const char file_contents[] = "test contents for passfd";
 218         _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
 219         int r;
 220
 221         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 222
 223         r = safe_fork("(passfd_read)", FORK_DEATHSIG_SIGTERM|FORK_LOG|FORK_WAIT, NULL);
 224         assert_se(r >= 0);
 225
 226         if (r == 0) {
 227                 /* Child */
 228                 pair[0] = safe_close(pair[0]);
 229
 230                 char tmpfile[] = "/tmp/test-socket-util-passfd-read-XXXXXX";
 231                 assert_se(write_tmpfile(tmpfile, file_contents) == 0);
 232
 233                 _cleanup_close_ int tmpfd = open(tmpfile, O_RDONLY);
 234                 assert_se(tmpfd >= 0);
 235                 assert_se(unlink(tmpfile) == 0);
 236
 237                 assert_se(send_one_fd(pair[1], tmpfd, MSG_DONTWAIT) == 0);
 238                 _exit(EXIT_SUCCESS);
 239         }
 240
 241         /* Parent */
 242         char buf[64];
 243         struct iovec iov = IOVEC_MAKE(buf, sizeof(buf)-1);
 244         _cleanup_close_ int fd = -EBADF;
 245
 246         pair[1] = safe_close(pair[1]);
 247
 248         assert_se(receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd) == 0);
 249
 250         assert_se(fd >= 0);
 251         ssize_t n = read(fd, buf, sizeof(buf)-1);
 252         assert_se(n >= 0);
 253         buf[n] = 0;
 254         ASSERT_STREQ(buf, file_contents);
 255 }
 256
 257 TEST(passfd_contents_read) {
 258         _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
 259         static const char file_contents[] = "test contents in the file";
 260         static const char wire_contents[] = "test contents on the wire";
 261         int r;
 262
 263         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 264
 265         r = safe_fork("(passfd_contents_read)", FORK_DEATHSIG_SIGTERM|FORK_LOG|FORK_WAIT, NULL);
 266         assert_se(r >= 0);
 267
 268         if (r == 0) {
 269                 /* Child */
 270                 struct iovec iov = IOVEC_MAKE_STRING(wire_contents);
 271                 char tmpfile[] = "/tmp/test-socket-util-passfd-contents-read-XXXXXX";
 272
 273                 pair[0] = safe_close(pair[0]);
 274
 275                 assert_se(write_tmpfile(tmpfile, file_contents) == 0);
 276
 277                 _cleanup_close_ int tmpfd = open(tmpfile, O_RDONLY);
 278                 assert_se(tmpfd >= 0);
 279                 assert_se(unlink(tmpfile) == 0);
 280
 281                 assert_se(send_one_fd_iov(pair[1], tmpfd, &iov, 1, MSG_DONTWAIT) > 0);
 282                 _exit(EXIT_SUCCESS);
 283         }
 284
 285         /* Parent */
 286         char buf[64];
 287         struct iovec iov = IOVEC_MAKE(buf, sizeof(buf)-1);
 288         _cleanup_close_ int fd = -EBADF;
 289         ssize_t k;
 290
 291         pair[1] = safe_close(pair[1]);
 292
 293         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 294         assert_se(k > 0);
 295         buf[k] = 0;
 296         ASSERT_STREQ(buf, wire_contents);
 297
 298         assert_se(fd >= 0);
 299         r = read(fd, buf, sizeof(buf)-1);
 300         assert_se(r >= 0);
 301         buf[r] = 0;
 302         ASSERT_STREQ(buf, file_contents);
 303 }
 304
 305 TEST(pass_many_fds_contents_read) {
 306         _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
 307         static const char file_contents[][STRLEN("test contents in the fileX") + 1] = {
 308                 "test contents in the file0",
 309                 "test contents in the file1",
 310                 "test contents in the file2"
 311         };
 312         static const char wire_contents[] = "test contents on the wire";
 313         int r;
 314
 315         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 316
 317         r = safe_fork("(passfd_contents_read)", FORK_DEATHSIG_SIGTERM|FORK_LOG|FORK_WAIT, NULL);
 318         assert_se(r >= 0);
 319
 320         if (r == 0) {
 321                 /* Child */
 322                 struct iovec iov = IOVEC_MAKE_STRING(wire_contents);
 323                 char tmpfile[][STRLEN("/tmp/test-socket-util-passfd-contents-read-XXXXXX") + 1] = {
 324                         "/tmp/test-socket-util-passfd-contents-read-XXXXXX",
 325                         "/tmp/test-socket-util-passfd-contents-read-XXXXXX",
 326                         "/tmp/test-socket-util-passfd-contents-read-XXXXXX"
 327                 };
 328                 int tmpfds[3] = EBADF_TRIPLET;
 329
 330                 pair[0] = safe_close(pair[0]);
 331
 332                 for (size_t i = 0; i < 3; ++i) {
 333                         assert_se(write_tmpfile(tmpfile[i], file_contents[i]) == 0);
 334                         tmpfds[i] = open(tmpfile[i], O_RDONLY);
 335                         assert_se(tmpfds[i] >= 0);
 336                         assert_se(unlink(tmpfile[i]) == 0);
 337                 }
 338
 339                 assert_se(send_many_fds_iov(pair[1], tmpfds, 3, &iov, 1, MSG_DONTWAIT) > 0);
 340                 close_many(tmpfds, 3);
 341                 _exit(EXIT_SUCCESS);
 342         }
 343
 344         /* Parent */
 345         char buf[64];
 346         struct iovec iov = IOVEC_MAKE(buf, sizeof(buf)-1);
 347         _cleanup_free_ int *fds = NULL;
 348         size_t n_fds = 0;
 349         ssize_t k;
 350
 351         pair[1] = safe_close(pair[1]);
 352
 353         k = receive_many_fds_iov(pair[0], &iov, 1, &fds, &n_fds, MSG_DONTWAIT);
 354         assert_se(k > 0);
 355         buf[k] = 0;
 356         ASSERT_STREQ(buf, wire_contents);
 357
 358         assert_se(n_fds == 3);
 359
 360         for (size_t i = 0; i < 3; ++i) {
 361                 assert_se(fds[i] >= 0);
 362                 r = read(fds[i], buf, sizeof(buf)-1);
 363                 assert_se(r >= 0);
 364                 buf[r] = 0;
 365                 ASSERT_STREQ(buf, file_contents[i]);
 366                 safe_close(fds[i]);
 367         }
 368 }
 369
 370 TEST(receive_nopassfd) {
 371         _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
 372         static const char wire_contents[] = "no fd passed here";
 373         int r;
 374
 375         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 376
 377         r = safe_fork("(receive_nopassfd)", FORK_DEATHSIG_SIGTERM|FORK_LOG|FORK_WAIT, NULL);
 378         assert_se(r >= 0);
 379
 380         if (r == 0) {
 381                 /* Child */
 382                 struct iovec iov = IOVEC_MAKE_STRING(wire_contents);
 383
 384                 pair[0] = safe_close(pair[0]);
 385
 386                 assert_se(send_one_fd_iov(pair[1], -1, &iov, 1, MSG_DONTWAIT) > 0);
 387                 _exit(EXIT_SUCCESS);
 388         }
 389
 390         /* Parent */
 391         char buf[64];
 392         struct iovec iov = IOVEC_MAKE(buf, sizeof(buf)-1);
 393         int fd = -999;
 394         ssize_t k;
 395
 396         pair[1] = safe_close(pair[1]);
 397
 398         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 399         assert_se(k > 0);
 400         buf[k] = 0;
 401         ASSERT_STREQ(buf, wire_contents);
 402
 403         /* no fd passed here, confirm it was reset */
 404         assert_se(fd == -EBADF);
 405 }
 406
 407 TEST(send_nodata_nofd) {
 408         _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
 409         int r;
 410
 411         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 412
 413         r = safe_fork("(send_nodata_nofd)", FORK_DEATHSIG_SIGTERM|FORK_LOG|FORK_WAIT, NULL);
 414         assert_se(r >= 0);
 415
 416         if (r == 0) {
 417                 /* Child */
 418                 pair[0] = safe_close(pair[0]);
 419
 420                 assert_se(send_one_fd_iov(pair[1], -1, NULL, 0, MSG_DONTWAIT) == -EINVAL);
 421                 _exit(EXIT_SUCCESS);
 422         }
 423
 424         /* Parent */
 425         char buf[64];
 426         struct iovec iov = IOVEC_MAKE(buf, sizeof(buf)-1);
 427         int fd = -999;
 428         ssize_t k;
 429
 430         pair[1] = safe_close(pair[1]);
 431
 432         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 433         /* recvmsg() will return errno EAGAIN if nothing was sent */
 434         assert_se(k == -EAGAIN);
 435
 436         /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */
 437         assert_se(fd == -999);
 438 }
 439
 440 TEST(send_emptydata) {
 441         _cleanup_close_pair_ int pair[2] = EBADF_PAIR;
 442         int r;
 443
 444         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 445
 446         r = safe_fork("(send_emptydata)", FORK_DEATHSIG_SIGTERM|FORK_LOG|FORK_WAIT, NULL);
 447         assert_se(r >= 0);
 448
 449         if (r == 0) {
 450                 /* Child */
 451                 pair[0] = safe_close(pair[0]);
 452
 453                 /* This will succeed, since iov is set. */
 454                 assert_se(send_one_fd_iov(pair[1], -1, &iovec_empty, 1, MSG_DONTWAIT) == 0);
 455                 _exit(EXIT_SUCCESS);
 456         }
 457
 458         /* Parent */
 459         char buf[64];
 460         struct iovec iov = IOVEC_MAKE(buf, sizeof(buf)-1);
 461         int fd = -999;
 462         ssize_t k;
 463
 464         pair[1] = safe_close(pair[1]);
 465
 466         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 467         /* receive_one_fd_iov() returns -EIO if an fd is not found and no data was returned. */
 468         assert_se(k == -EIO);
 469
 470         /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */
 471         assert_se(fd == -999);
 472 }
 473
 474 TEST(flush_accept) {
 475         _cleanup_close_ int listen_stream, listen_dgram, listen_seqpacket, connect_stream, connect_dgram, connect_seqpacket;
 476         static const union sockaddr_union sa = { .un.sun_family = AF_UNIX };
 477         union sockaddr_union lsa;
 478         socklen_t l;
 479
 480         listen_stream = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 481         assert_se(listen_stream >= 0);
 482
 483         listen_dgram = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 484         assert_se(listen_dgram >= 0);
 485
 486         listen_seqpacket = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 487         assert_se(listen_seqpacket >= 0);
 488
 489         assert_se(flush_accept(listen_stream) < 0);
 490         assert_se(flush_accept(listen_dgram) < 0);
 491         assert_se(flush_accept(listen_seqpacket) < 0);
 492
 493         assert_se(bind(listen_stream, &sa.sa, sizeof(sa_family_t)) >= 0);
 494         assert_se(bind(listen_dgram, &sa.sa, sizeof(sa_family_t)) >= 0);
 495         assert_se(bind(listen_seqpacket, &sa.sa, sizeof(sa_family_t)) >= 0);
 496
 497         assert_se(flush_accept(listen_stream) < 0);
 498         assert_se(flush_accept(listen_dgram) < 0);
 499         assert_se(flush_accept(listen_seqpacket) < 0);
 500
 501         assert_se(listen(listen_stream, SOMAXCONN_DELUXE) >= 0);
 502         assert_se(listen(listen_dgram, SOMAXCONN_DELUXE) < 0);
 503         assert_se(listen(listen_seqpacket, SOMAXCONN_DELUXE) >= 0);
 504
 505         assert_se(flush_accept(listen_stream) >= 0);
 506         assert_se(flush_accept(listen_dgram) < 0);
 507         assert_se(flush_accept(listen_seqpacket) >= 0);
 508
 509         connect_stream = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 510         assert_se(connect_stream >= 0);
 511
 512         connect_dgram = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 513         assert_se(connect_dgram >= 0);
 514
 515         connect_seqpacket = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 516         assert_se(connect_seqpacket >= 0);
 517
 518         l = sizeof(lsa);
 519         assert_se(getsockname(listen_stream, &lsa.sa, &l) >= 0);
 520         assert_se(connect(connect_stream, &lsa.sa, l) >= 0);
 521
 522         l = sizeof(lsa);
 523         assert_se(getsockname(listen_dgram, &lsa.sa, &l) >= 0);
 524         assert_se(connect(connect_dgram, &lsa.sa, l) >= 0);
 525
 526         l = sizeof(lsa);
 527         assert_se(getsockname(listen_seqpacket, &lsa.sa, &l) >= 0);
 528         assert_se(connect(connect_seqpacket, &lsa.sa, l) >= 0);
 529
 530         assert_se(flush_accept(listen_stream) >= 0);
 531         assert_se(flush_accept(listen_dgram) < 0);
 532         assert_se(flush_accept(listen_seqpacket) >= 0);
 533 }
 534
 535 TEST(ipv6_enabled) {
 536         log_info("IPv6 supported: %s", yes_no(socket_ipv6_is_supported()));
 537         log_info("IPv6 enabled: %s", yes_no(socket_ipv6_is_enabled()));
 538 }
 539
 540 TEST(sockaddr_un_set_path) {
 541         _cleanup_(rm_rf_physical_and_freep) char *t = NULL;
 542         _cleanup_(unlink_and_freep) char *sh = NULL;
 543         _cleanup_free_ char *j = NULL;
 544         union sockaddr_union sa;
 545         _cleanup_close_ int fd1, fd2, fd3;
 546
 547         assert_se(mkdtemp_malloc("/tmp/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaXXXXXX", &t) >= 0);
 548         assert_se(strlen(t) > SUN_PATH_LEN);
 549
 550         assert_se(j = path_join(t, "sock"));
 551         assert_se(sockaddr_un_set_path(&sa.un, j) == -ENAMETOOLONG); /* too long for AF_UNIX socket */
 552
 553         assert_se(asprintf(&sh, "/tmp/%" PRIx64, random_u64()) >= 0);
 554         assert_se(symlink(t, sh) >= 0); /* create temporary symlink, to access it anyway */
 555
 556         free(j);
 557         assert_se(j = path_join(sh, "sock"));
 558         assert_se(sockaddr_un_set_path(&sa.un, j) >= 0);
 559
 560         fd1 = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
 561         assert_se(fd1 >= 0);
 562         assert_se(bind(fd1, &sa.sa, sockaddr_len(&sa)) >= 0);
 563         assert_se(listen(fd1, 1) >= 0);
 564
 565         sh = unlink_and_free(sh); /* remove temporary symlink */
 566
 567         fd2 = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
 568         assert_se(fd2 >= 0);
 569         assert_se(connect(fd2, &sa.sa, sockaddr_len(&sa)) < 0);
 570         assert_se(errno == ENOENT); /* we removed the symlink, must fail */
 571
 572         free(j);
 573         assert_se(j = path_join(t, "sock"));
 574
 575         fd3 = open(j, O_CLOEXEC|O_PATH|O_NOFOLLOW);
 576         assert_se(fd3 > 0);
 577         assert_se(sockaddr_un_set_path(&sa.un, FORMAT_PROC_FD_PATH(fd3)) >= 0); /* connect via O_PATH instead, circumventing 108ch limit */
 578
 579         assert_se(connect(fd2, &sa.sa, sockaddr_len(&sa)) >= 0);
 580 }
 581
 582 TEST(getpeerpidref) {
 583         _cleanup_close_pair_ int fd[2] = EBADF_PAIR;
 584
 585         ASSERT_OK(socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fd));
 586
 587         _cleanup_(pidref_done) PidRef pidref0 = PIDREF_NULL, pidref1 = PIDREF_NULL, pidref_self = PIDREF_NULL, pidref_pid1 = PIDREF_NULL;
 588         ASSERT_OK(getpeerpidref(fd[0], &pidref0));
 589         ASSERT_OK(getpeerpidref(fd[1], &pidref1));
 590
 591         ASSERT_OK(pidref_set_self(&pidref_self));
 592         ASSERT_OK(pidref_set_pid(&pidref_pid1, 1));
 593
 594         ASSERT_TRUE(pidref_equal(&pidref0, &pidref1));
 595         ASSERT_TRUE(pidref_equal(&pidref0, &pidref_self));
 596         ASSERT_TRUE(pidref_equal(&pidref1, &pidref_self));
 597
 598         ASSERT_TRUE(!pidref_equal(&pidref_self, &pidref_pid1));
 599         ASSERT_TRUE(!pidref_equal(&pidref1, &pidref_pid1));
 600         ASSERT_TRUE(!pidref_equal(&pidref0, &pidref_pid1));
 601 }
 602
 603 DEFINE_TEST_MAIN(LOG_DEBUG);