src/test/test-socket-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <fcntl.h>
   4 #include <grp.h>
   5 #include <sys/stat.h>
   6 #include <sys/types.h>
   7 #include <unistd.h>
   8
   9 #include "alloc-util.h"
  10 #include "async.h"
  11 #include "escape.h"
  12 #include "exit-status.h"
  13 #include "fd-util.h"
  14 #include "in-addr-util.h"
  15 #include "io-util.h"
  16 #include "log.h"
  17 #include "macro.h"
  18 #include "missing_network.h"
  19 #include "process-util.h"
  20 #include "socket-netlink.h"
  21 #include "socket-util.h"
  22 #include "string-util.h"
  23 #include "tests.h"
  24 #include "tmpfile-util.h"
  25
  26 assert_cc(SUN_PATH_LEN == 108);
  27
  28 static void test_ifname_valid(void) {
  29         log_info("/* %s */", __func__);
  30
  31         assert(ifname_valid("foo"));
  32         assert(ifname_valid("eth0"));
  33
  34         assert(!ifname_valid("0"));
  35         assert(!ifname_valid("99"));
  36         assert(ifname_valid("a99"));
  37         assert(ifname_valid("99a"));
  38
  39         assert(!ifname_valid(NULL));
  40         assert(!ifname_valid(""));
  41         assert(!ifname_valid(" "));
  42         assert(!ifname_valid(" foo"));
  43         assert(!ifname_valid("bar\n"));
  44         assert(!ifname_valid("."));
  45         assert(!ifname_valid(".."));
  46         assert(ifname_valid("foo.bar"));
  47         assert(!ifname_valid("x:y"));
  48
  49         assert(ifname_valid("xxxxxxxxxxxxxxx"));
  50         assert(!ifname_valid("xxxxxxxxxxxxxxxx"));
  51         assert(ifname_valid_full("xxxxxxxxxxxxxxxx", true));
  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(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_se(streq(out, expected));
  68 }
  69
  70 static void test_socket_print_unix(void) {
  71         log_info("/* %s */", __func__);
  72
  73         /* Some additional tests for abstract addresses which we don't parse */
  74
  75         test_socket_print_unix_one("\0\0\0\0", 4, "@\\000\\000\\000");
  76         test_socket_print_unix_one("@abs", 5, "@abs");
  77         test_socket_print_unix_one("\n", 2, "\\n");
  78         test_socket_print_unix_one("", 1, "<unnamed>");
  79         test_socket_print_unix_one("\0", 1, "<unnamed>");
  80         test_socket_print_unix_one("\0_________________________there's 108 characters in this string_____________________________________________", 108,
  81                                    "@_________________________there\\'s 108 characters in this string_____________________________________________");
  82         test_socket_print_unix_one("////////////////////////////////////////////////////////////////////////////////////////////////////////////", 108,
  83                                    "////////////////////////////////////////////////////////////////////////////////////////////////////////////");
  84         test_socket_print_unix_one("\0\a\b\n\255", 6, "@\\a\\b\\n\\255\\000");
  85 }
  86
  87 static void test_in_addr_is_null(void) {
  88         union in_addr_union i = {};
  89
  90         log_info("/* %s */", __func__);
  91
  92         assert_se(in_addr_is_null(AF_INET, &i) == true);
  93         assert_se(in_addr_is_null(AF_INET6, &i) == true);
  94
  95         i.in.s_addr = 0x1000000;
  96         assert_se(in_addr_is_null(AF_INET, &i) == false);
  97         assert_se(in_addr_is_null(AF_INET6, &i) == false);
  98
  99         assert_se(in_addr_is_null(-1, &i) == -EAFNOSUPPORT);
 100 }
 101
 102 static void test_in_addr_prefix_intersect_one(unsigned f, const char *a, unsigned apl, const char *b, unsigned bpl, int result) {
 103         union in_addr_union ua, ub;
 104
 105         assert_se(in_addr_from_string(f, a, &ua) >= 0);
 106         assert_se(in_addr_from_string(f, b, &ub) >= 0);
 107
 108         assert_se(in_addr_prefix_intersect(f, &ua, apl, &ub, bpl) == result);
 109 }
 110
 111 static void test_in_addr_prefix_intersect(void) {
 112         log_info("/* %s */", __func__);
 113
 114         test_in_addr_prefix_intersect_one(AF_INET, "255.255.255.255", 32, "255.255.255.254", 32, 0);
 115         test_in_addr_prefix_intersect_one(AF_INET, "255.255.255.255", 0, "255.255.255.255", 32, 1);
 116         test_in_addr_prefix_intersect_one(AF_INET, "0.0.0.0", 0, "47.11.8.15", 32, 1);
 117
 118         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.1", 24, 1);
 119         test_in_addr_prefix_intersect_one(AF_INET, "2.2.2.2", 24, "1.1.1.1", 24, 0);
 120
 121         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.127", 25, 1);
 122         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.127", 26, 1);
 123         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 25, "1.1.1.127", 25, 1);
 124         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 25, "1.1.1.255", 25, 0);
 125
 126         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);
 127         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);
 128         test_in_addr_prefix_intersect_one(AF_INET6, "::", 0, "beef:beef:beef:beef:beef:beef:beef:beef", 128, 1);
 129
 130         test_in_addr_prefix_intersect_one(AF_INET6, "1::2", 64, "1::2", 64, 1);
 131         test_in_addr_prefix_intersect_one(AF_INET6, "2::2", 64, "1::2", 64, 0);
 132
 133         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 120, "1::007f", 121, 1);
 134         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 120, "1::007f", 122, 1);
 135         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 121, "1::007f", 121, 1);
 136         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 121, "1::00ff", 121, 0);
 137 }
 138
 139 static void test_in_addr_prefix_next_one(unsigned f, const char *before, unsigned pl, const char *after) {
 140         union in_addr_union ubefore, uafter, t;
 141
 142         assert_se(in_addr_from_string(f, before, &ubefore) >= 0);
 143
 144         t = ubefore;
 145         assert_se((in_addr_prefix_next(f, &t, pl) > 0) == !!after);
 146
 147         if (after) {
 148                 assert_se(in_addr_from_string(f, after, &uafter) >= 0);
 149                 assert_se(in_addr_equal(f, &t, &uafter) > 0);
 150         }
 151 }
 152
 153 static void test_in_addr_prefix_next(void) {
 154         log_info("/* %s */", __func__);
 155
 156         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 24, "192.168.1.0");
 157         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 16, "192.169.0.0");
 158         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 20, "192.168.16.0");
 159
 160         test_in_addr_prefix_next_one(AF_INET, "0.0.0.0", 32, "0.0.0.1");
 161         test_in_addr_prefix_next_one(AF_INET, "255.255.255.255", 32, NULL);
 162         test_in_addr_prefix_next_one(AF_INET, "255.255.255.0", 24, NULL);
 163
 164         test_in_addr_prefix_next_one(AF_INET6, "4400::", 128, "4400::0001");
 165         test_in_addr_prefix_next_one(AF_INET6, "4400::", 120, "4400::0100");
 166         test_in_addr_prefix_next_one(AF_INET6, "4400::", 127, "4400::0002");
 167         test_in_addr_prefix_next_one(AF_INET6, "4400::", 8, "4500::");
 168         test_in_addr_prefix_next_one(AF_INET6, "4400::", 7, "4600::");
 169
 170         test_in_addr_prefix_next_one(AF_INET6, "::", 128, "::1");
 171
 172         test_in_addr_prefix_next_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", 128, NULL);
 173         test_in_addr_prefix_next_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00", 120, NULL);
 174 }
 175
 176 static void test_in_addr_to_string_one(int f, const char *addr) {
 177         union in_addr_union ua;
 178         _cleanup_free_ char *r = NULL;
 179
 180         assert_se(in_addr_from_string(f, addr, &ua) >= 0);
 181         assert_se(in_addr_to_string(f, &ua, &r) >= 0);
 182         printf("test_in_addr_to_string_one: %s == %s\n", addr, r);
 183         assert_se(streq(addr, r));
 184 }
 185
 186 static void test_in_addr_to_string(void) {
 187         log_info("/* %s */", __func__);
 188
 189         test_in_addr_to_string_one(AF_INET, "192.168.0.1");
 190         test_in_addr_to_string_one(AF_INET, "10.11.12.13");
 191         test_in_addr_to_string_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff");
 192         test_in_addr_to_string_one(AF_INET6, "::1");
 193         test_in_addr_to_string_one(AF_INET6, "fe80::");
 194 }
 195
 196 static void test_in_addr_ifindex_to_string_one(int f, const char *a, int ifindex, const char *b) {
 197         _cleanup_free_ char *r = NULL;
 198         union in_addr_union ua, uuaa;
 199         int ff, ifindex2;
 200
 201         assert_se(in_addr_from_string(f, a, &ua) >= 0);
 202         assert_se(in_addr_ifindex_to_string(f, &ua, ifindex, &r) >= 0);
 203         printf("test_in_addr_ifindex_to_string_one: %s == %s\n", b, r);
 204         assert_se(streq(b, r));
 205
 206         assert_se(in_addr_ifindex_from_string_auto(b, &ff, &uuaa, &ifindex2) >= 0);
 207         assert_se(ff == f);
 208         assert_se(in_addr_equal(f, &ua, &uuaa));
 209         assert_se(ifindex2 == ifindex || ifindex2 == 0);
 210 }
 211
 212 static void test_in_addr_ifindex_to_string(void) {
 213         log_info("/* %s */", __func__);
 214
 215         test_in_addr_ifindex_to_string_one(AF_INET, "192.168.0.1", 7, "192.168.0.1");
 216         test_in_addr_ifindex_to_string_one(AF_INET, "10.11.12.13", 9, "10.11.12.13");
 217         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");
 218         test_in_addr_ifindex_to_string_one(AF_INET6, "::1", 11, "::1");
 219         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::", 12, "fe80::%12");
 220         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::", 0, "fe80::");
 221         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::14", 12, "fe80::14%12");
 222         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::15", -7, "fe80::15");
 223         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::16", LOOPBACK_IFINDEX, "fe80::16%1");
 224 }
 225
 226 static void test_in_addr_ifindex_from_string_auto(void) {
 227         int family, ifindex;
 228         union in_addr_union ua;
 229
 230         log_info("/* %s */", __func__);
 231         /* Most in_addr_ifindex_from_string_auto() invocations have already been tested above, but let's test some more */
 232
 233         assert_se(in_addr_ifindex_from_string_auto("fe80::17", &family, &ua, &ifindex) >= 0);
 234         assert_se(family == AF_INET6);
 235         assert_se(ifindex == 0);
 236
 237         assert_se(in_addr_ifindex_from_string_auto("fe80::18%19", &family, &ua, &ifindex) >= 0);
 238         assert_se(family == AF_INET6);
 239         assert_se(ifindex == 19);
 240
 241         assert_se(in_addr_ifindex_from_string_auto("fe80::18%lo", &family, &ua, &ifindex) >= 0);
 242         assert_se(family == AF_INET6);
 243         assert_se(ifindex == LOOPBACK_IFINDEX);
 244
 245         assert_se(in_addr_ifindex_from_string_auto("fe80::19%thisinterfacecantexist", &family, &ua, &ifindex) == -ENODEV);
 246 }
 247
 248 static void test_sockaddr_equal(void) {
 249         union sockaddr_union a = {
 250                 .in.sin_family = AF_INET,
 251                 .in.sin_port = 0,
 252                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
 253         };
 254         union sockaddr_union b = {
 255                 .in.sin_family = AF_INET,
 256                 .in.sin_port = 0,
 257                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
 258         };
 259         union sockaddr_union c = {
 260                 .in.sin_family = AF_INET,
 261                 .in.sin_port = 0,
 262                 .in.sin_addr.s_addr = htobe32(1234),
 263         };
 264         union sockaddr_union d = {
 265                 .in6.sin6_family = AF_INET6,
 266                 .in6.sin6_port = 0,
 267                 .in6.sin6_addr = IN6ADDR_ANY_INIT,
 268         };
 269         union sockaddr_union e = {
 270                 .vm.svm_family = AF_VSOCK,
 271                 .vm.svm_port = 0,
 272                 .vm.svm_cid = VMADDR_CID_ANY,
 273         };
 274
 275         log_info("/* %s */", __func__);
 276
 277         assert_se(sockaddr_equal(&a, &a));
 278         assert_se(sockaddr_equal(&a, &b));
 279         assert_se(sockaddr_equal(&d, &d));
 280         assert_se(sockaddr_equal(&e, &e));
 281         assert_se(!sockaddr_equal(&a, &c));
 282         assert_se(!sockaddr_equal(&b, &c));
 283         assert_se(!sockaddr_equal(&a, &e));
 284 }
 285
 286 static void test_sockaddr_un_len(void) {
 287         log_info("/* %s */", __func__);
 288
 289         static const struct sockaddr_un fs = {
 290                 .sun_family = AF_UNIX,
 291                 .sun_path = "/foo/bar/waldo",
 292         };
 293
 294         static const struct sockaddr_un abstract = {
 295                 .sun_family = AF_UNIX,
 296                 .sun_path = "\0foobar",
 297         };
 298
 299         assert_se(SOCKADDR_UN_LEN(fs) == offsetof(struct sockaddr_un, sun_path) + strlen(fs.sun_path) + 1);
 300         assert_se(SOCKADDR_UN_LEN(abstract) == offsetof(struct sockaddr_un, sun_path) + 1 + strlen(abstract.sun_path + 1));
 301 }
 302
 303 static void test_in_addr_is_multicast(void) {
 304         union in_addr_union a, b;
 305         int f;
 306
 307         log_info("/* %s */", __func__);
 308
 309         assert_se(in_addr_from_string_auto("192.168.3.11", &f, &a) >= 0);
 310         assert_se(in_addr_is_multicast(f, &a) == 0);
 311
 312         assert_se(in_addr_from_string_auto("224.0.0.1", &f, &a) >= 0);
 313         assert_se(in_addr_is_multicast(f, &a) == 1);
 314
 315         assert_se(in_addr_from_string_auto("FF01:0:0:0:0:0:0:1", &f, &b) >= 0);
 316         assert_se(in_addr_is_multicast(f, &b) == 1);
 317
 318         assert_se(in_addr_from_string_auto("2001:db8::c:69b:aeff:fe53:743e", &f, &b) >= 0);
 319         assert_se(in_addr_is_multicast(f, &b) == 0);
 320 }
 321
 322 static void test_getpeercred_getpeergroups(void) {
 323         int r;
 324
 325         log_info("/* %s */", __func__);
 326
 327         r = safe_fork("(getpeercred)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 328         assert_se(r >= 0);
 329
 330         if (r == 0) {
 331                 static const gid_t gids[] = { 3, 4, 5, 6, 7 };
 332                 gid_t *test_gids;
 333                 size_t n_test_gids;
 334                 uid_t test_uid;
 335                 gid_t test_gid;
 336                 struct ucred ucred;
 337                 int pair[2];
 338
 339                 if (geteuid() == 0) {
 340                         test_uid = 1;
 341                         test_gid = 2;
 342                         test_gids = (gid_t*) gids;
 343                         n_test_gids = ELEMENTSOF(gids);
 344
 345                         assert_se(setgroups(n_test_gids, test_gids) >= 0);
 346                         assert_se(setresgid(test_gid, test_gid, test_gid) >= 0);
 347                         assert_se(setresuid(test_uid, test_uid, test_uid) >= 0);
 348
 349                 } else {
 350                         long ngroups_max;
 351
 352                         test_uid = getuid();
 353                         test_gid = getgid();
 354
 355                         ngroups_max = sysconf(_SC_NGROUPS_MAX);
 356                         assert(ngroups_max > 0);
 357
 358                         test_gids = newa(gid_t, ngroups_max);
 359
 360                         r = getgroups(ngroups_max, test_gids);
 361                         assert_se(r >= 0);
 362                         n_test_gids = (size_t) r;
 363                 }
 364
 365                 assert_se(socketpair(AF_UNIX, SOCK_STREAM, 0, pair) >= 0);
 366
 367                 assert_se(getpeercred(pair[0], &ucred) >= 0);
 368
 369                 assert_se(ucred.uid == test_uid);
 370                 assert_se(ucred.gid == test_gid);
 371                 assert_se(ucred.pid == getpid_cached());
 372
 373                 {
 374                         _cleanup_free_ gid_t *peer_groups = NULL;
 375
 376                         r = getpeergroups(pair[0], &peer_groups);
 377                         assert_se(r >= 0 || IN_SET(r, -EOPNOTSUPP, -ENOPROTOOPT));
 378
 379                         if (r >= 0) {
 380                                 assert_se((size_t) r == n_test_gids);
 381                                 assert_se(memcmp(peer_groups, test_gids, sizeof(gid_t) * n_test_gids) == 0);
 382                         }
 383                 }
 384
 385                 safe_close_pair(pair);
 386                 _exit(EXIT_SUCCESS);
 387         }
 388 }
 389
 390 static void test_passfd_read(void) {
 391         static const char file_contents[] = "test contents for passfd";
 392         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 393         int r;
 394
 395         log_info("/* %s */", __func__);
 396
 397         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 398
 399         r = safe_fork("(passfd_read)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 400         assert_se(r >= 0);
 401
 402         if (r == 0) {
 403                 /* Child */
 404                 char tmpfile[] = "/tmp/test-socket-util-passfd-read-XXXXXX";
 405                 _cleanup_close_ int tmpfd = -1;
 406
 407                 pair[0] = safe_close(pair[0]);
 408
 409                 tmpfd = mkostemp_safe(tmpfile);
 410                 assert_se(tmpfd >= 0);
 411                 assert_se(write(tmpfd, file_contents, strlen(file_contents)) == (ssize_t) strlen(file_contents));
 412                 tmpfd = safe_close(tmpfd);
 413
 414                 tmpfd = open(tmpfile, O_RDONLY);
 415                 assert_se(tmpfd >= 0);
 416                 assert_se(unlink(tmpfile) == 0);
 417
 418                 assert_se(send_one_fd(pair[1], tmpfd, MSG_DONTWAIT) == 0);
 419                 _exit(EXIT_SUCCESS);
 420         }
 421
 422         /* Parent */
 423         char buf[64];
 424         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 425         _cleanup_close_ int fd = -1;
 426
 427         pair[1] = safe_close(pair[1]);
 428
 429         assert_se(receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd) == 0);
 430
 431         assert_se(fd >= 0);
 432         r = read(fd, buf, sizeof(buf)-1);
 433         assert_se(r >= 0);
 434         buf[r] = 0;
 435         assert_se(streq(buf, file_contents));
 436 }
 437
 438 static void test_passfd_contents_read(void) {
 439         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 440         static const char file_contents[] = "test contents in the file";
 441         static const char wire_contents[] = "test contents on the wire";
 442         int r;
 443
 444         log_info("/* %s */", __func__);
 445
 446         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 447
 448         r = safe_fork("(passfd_contents_read)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 449         assert_se(r >= 0);
 450
 451         if (r == 0) {
 452                 /* Child */
 453                 struct iovec iov = IOVEC_INIT_STRING(wire_contents);
 454                 char tmpfile[] = "/tmp/test-socket-util-passfd-contents-read-XXXXXX";
 455                 _cleanup_close_ int tmpfd = -1;
 456
 457                 pair[0] = safe_close(pair[0]);
 458
 459                 tmpfd = mkostemp_safe(tmpfile);
 460                 assert_se(tmpfd >= 0);
 461                 assert_se(write(tmpfd, file_contents, strlen(file_contents)) == (ssize_t) strlen(file_contents));
 462                 tmpfd = safe_close(tmpfd);
 463
 464                 tmpfd = open(tmpfile, O_RDONLY);
 465                 assert_se(tmpfd >= 0);
 466                 assert_se(unlink(tmpfile) == 0);
 467
 468                 assert_se(send_one_fd_iov(pair[1], tmpfd, &iov, 1, MSG_DONTWAIT) > 0);
 469                 _exit(EXIT_SUCCESS);
 470         }
 471
 472         /* Parent */
 473         char buf[64];
 474         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 475         _cleanup_close_ int fd = -1;
 476         ssize_t k;
 477
 478         pair[1] = safe_close(pair[1]);
 479
 480         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 481         assert_se(k > 0);
 482         buf[k] = 0;
 483         assert_se(streq(buf, wire_contents));
 484
 485         assert_se(fd >= 0);
 486         r = read(fd, buf, sizeof(buf)-1);
 487         assert_se(r >= 0);
 488         buf[r] = 0;
 489         assert_se(streq(buf, file_contents));
 490 }
 491
 492 static void test_receive_nopassfd(void) {
 493         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 494         static const char wire_contents[] = "no fd passed here";
 495         int r;
 496
 497         log_info("/* %s */", __func__);
 498
 499         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 500
 501         r = safe_fork("(receive_nopassfd)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 502         assert_se(r >= 0);
 503
 504         if (r == 0) {
 505                 /* Child */
 506                 struct iovec iov = IOVEC_INIT_STRING(wire_contents);
 507
 508                 pair[0] = safe_close(pair[0]);
 509
 510                 assert_se(send_one_fd_iov(pair[1], -1, &iov, 1, MSG_DONTWAIT) > 0);
 511                 _exit(EXIT_SUCCESS);
 512         }
 513
 514         /* Parent */
 515         char buf[64];
 516         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 517         int fd = -999;
 518         ssize_t k;
 519
 520         pair[1] = safe_close(pair[1]);
 521
 522         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 523         assert_se(k > 0);
 524         buf[k] = 0;
 525         assert_se(streq(buf, wire_contents));
 526
 527         /* no fd passed here, confirm it was reset */
 528         assert_se(fd == -1);
 529 }
 530
 531 static void test_send_nodata_nofd(void) {
 532         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 533         int r;
 534
 535         log_info("/* %s */", __func__);
 536
 537         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 538
 539         r = safe_fork("(send_nodata_nofd)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 540         assert_se(r >= 0);
 541
 542         if (r == 0) {
 543                 /* Child */
 544                 pair[0] = safe_close(pair[0]);
 545
 546                 assert_se(send_one_fd_iov(pair[1], -1, NULL, 0, MSG_DONTWAIT) == -EINVAL);
 547                 _exit(EXIT_SUCCESS);
 548         }
 549
 550         /* Parent */
 551         char buf[64];
 552         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 553         int fd = -999;
 554         ssize_t k;
 555
 556         pair[1] = safe_close(pair[1]);
 557
 558         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 559         /* recvmsg() will return errno EAGAIN if nothing was sent */
 560         assert_se(k == -EAGAIN);
 561
 562         /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */
 563         assert_se(fd == -999);
 564 }
 565
 566 static void test_send_emptydata(void) {
 567         _cleanup_close_pair_ int pair[2] = { -1, -1 };
 568         int r;
 569
 570         log_info("/* %s */", __func__);
 571
 572         assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) >= 0);
 573
 574         r = safe_fork("(send_emptydata)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 575         assert_se(r >= 0);
 576
 577         if (r == 0) {
 578                 /* Child */
 579                 struct iovec iov = IOVEC_INIT_STRING("");  /* zero-length iov */
 580                 assert_se(iov.iov_len == 0);
 581
 582                 pair[0] = safe_close(pair[0]);
 583
 584                 /* This will succeed, since iov is set. */
 585                 assert_se(send_one_fd_iov(pair[1], -1, &iov, 1, MSG_DONTWAIT) == 0);
 586                 _exit(EXIT_SUCCESS);
 587         }
 588
 589         /* Parent */
 590         char buf[64];
 591         struct iovec iov = IOVEC_INIT(buf, sizeof(buf)-1);
 592         int fd = -999;
 593         ssize_t k;
 594
 595         pair[1] = safe_close(pair[1]);
 596
 597         k = receive_one_fd_iov(pair[0], &iov, 1, MSG_DONTWAIT, &fd);
 598         /* receive_one_fd_iov() returns -EIO if an fd is not found and no data was returned. */
 599         assert_se(k == -EIO);
 600
 601         /* receive_one_fd_iov returned error, so confirm &fd wasn't touched */
 602         assert_se(fd == -999);
 603 }
 604
 605 static void test_flush_accept(void) {
 606         _cleanup_close_ int listen_stream = -1, listen_dgram = -1, listen_seqpacket = 1, connect_stream = -1, connect_dgram = -1, connect_seqpacket = -1;
 607         static const union sockaddr_union sa = { .un.sun_family = AF_UNIX };
 608         union sockaddr_union lsa;
 609         socklen_t l;
 610
 611         listen_stream = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 612         assert_se(listen_stream >= 0);
 613
 614         listen_dgram = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 615         assert_se(listen_dgram >= 0);
 616
 617         listen_seqpacket = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 618         assert_se(listen_seqpacket >= 0);
 619
 620         assert_se(flush_accept(listen_stream) < 0);
 621         assert_se(flush_accept(listen_dgram) < 0);
 622         assert_se(flush_accept(listen_seqpacket) < 0);
 623
 624         assert_se(bind(listen_stream, &sa.sa, sizeof(sa_family_t)) >= 0);
 625         assert_se(bind(listen_dgram, &sa.sa, sizeof(sa_family_t)) >= 0);
 626         assert_se(bind(listen_seqpacket, &sa.sa, sizeof(sa_family_t)) >= 0);
 627
 628         assert_se(flush_accept(listen_stream) < 0);
 629         assert_se(flush_accept(listen_dgram) < 0);
 630         assert_se(flush_accept(listen_seqpacket) < 0);
 631
 632         assert_se(listen(listen_stream, SOMAXCONN) >= 0);
 633         assert_se(listen(listen_dgram, SOMAXCONN) < 0);
 634         assert_se(listen(listen_seqpacket, SOMAXCONN) >= 0);
 635
 636         assert_se(flush_accept(listen_stream) >= 0);
 637         assert_se(flush_accept(listen_dgram) < 0);
 638         assert_se(flush_accept(listen_seqpacket) >= 0);
 639
 640         connect_stream = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 641         assert_se(connect_stream >= 0);
 642
 643         connect_dgram = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 644         assert_se(connect_dgram >= 0);
 645
 646         connect_seqpacket = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 647         assert_se(connect_seqpacket >= 0);
 648
 649         l = sizeof(lsa);
 650         assert_se(getsockname(listen_stream, &lsa.sa, &l) >= 0);
 651         assert_se(connect(connect_stream, &lsa.sa, l) >= 0);
 652
 653         l = sizeof(lsa);
 654         assert_se(getsockname(listen_dgram, &lsa.sa, &l) >= 0);
 655         assert_se(connect(connect_dgram, &lsa.sa, l) >= 0);
 656
 657         l = sizeof(lsa);
 658         assert_se(getsockname(listen_seqpacket, &lsa.sa, &l) >= 0);
 659         assert_se(connect(connect_seqpacket, &lsa.sa, l) >= 0);
 660
 661         assert_se(flush_accept(listen_stream) >= 0);
 662         assert_se(flush_accept(listen_dgram) < 0);
 663         assert_se(flush_accept(listen_seqpacket) >= 0);
 664 }
 665
 666 int main(int argc, char *argv[]) {
 667         test_setup_logging(LOG_DEBUG);
 668
 669         test_ifname_valid();
 670
 671         test_socket_print_unix();
 672
 673         test_in_addr_is_null();
 674         test_in_addr_prefix_intersect();
 675         test_in_addr_prefix_next();
 676         test_in_addr_to_string();
 677         test_in_addr_ifindex_to_string();
 678         test_in_addr_ifindex_from_string_auto();
 679
 680         test_sockaddr_equal();
 681
 682         test_sockaddr_un_len();
 683
 684         test_in_addr_is_multicast();
 685
 686         test_getpeercred_getpeergroups();
 687
 688         test_passfd_read();
 689         test_passfd_contents_read();
 690         test_receive_nopassfd();
 691         test_send_nodata_nofd();
 692         test_send_emptydata();
 693         test_flush_accept();
 694
 695         return 0;
 696 }