src/test/test-socket-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd
   4
   5   Copyright 2014 Ronny Chevalier
   6 ***/
   7
   8 #include <sys/types.h>
   9 #include <unistd.h>
  10 #include <grp.h>
  11
  12 #include "alloc-util.h"
  13 #include "async.h"
  14 #include "fd-util.h"
  15 #include "in-addr-util.h"
  16 #include "log.h"
  17 #include "macro.h"
  18 #include "process-util.h"
  19 #include "socket-util.h"
  20 #include "string-util.h"
  21 #include "util.h"
  22
  23 static void test_ifname_valid(void) {
  24         assert(ifname_valid("foo"));
  25         assert(ifname_valid("eth0"));
  26
  27         assert(!ifname_valid("0"));
  28         assert(!ifname_valid("99"));
  29         assert(ifname_valid("a99"));
  30         assert(ifname_valid("99a"));
  31
  32         assert(!ifname_valid(NULL));
  33         assert(!ifname_valid(""));
  34         assert(!ifname_valid(" "));
  35         assert(!ifname_valid(" foo"));
  36         assert(!ifname_valid("bar\n"));
  37         assert(!ifname_valid("."));
  38         assert(!ifname_valid(".."));
  39         assert(ifname_valid("foo.bar"));
  40         assert(!ifname_valid("x:y"));
  41
  42         assert(ifname_valid("xxxxxxxxxxxxxxx"));
  43         assert(!ifname_valid("xxxxxxxxxxxxxxxx"));
  44 }
  45
  46 static void test_socket_address_parse(void) {
  47         SocketAddress a;
  48
  49         assert_se(socket_address_parse(&a, "junk") < 0);
  50         assert_se(socket_address_parse(&a, "192.168.1.1") < 0);
  51         assert_se(socket_address_parse(&a, ".168.1.1") < 0);
  52         assert_se(socket_address_parse(&a, "989.168.1.1") < 0);
  53         assert_se(socket_address_parse(&a, "192.168.1.1:65536") < 0);
  54         assert_se(socket_address_parse(&a, "192.168.1.1:0") < 0);
  55         assert_se(socket_address_parse(&a, "0") < 0);
  56         assert_se(socket_address_parse(&a, "65536") < 0);
  57
  58         assert_se(socket_address_parse(&a, "65535") >= 0);
  59
  60         /* The checks below will pass even if ipv6 is disabled in
  61          * kernel. The underlying glibc's inet_pton() is just a string
  62          * parser and doesn't make any syscalls. */
  63
  64         assert_se(socket_address_parse(&a, "[::1]") < 0);
  65         assert_se(socket_address_parse(&a, "[::1]8888") < 0);
  66         assert_se(socket_address_parse(&a, "::1") < 0);
  67         assert_se(socket_address_parse(&a, "[::1]:0") < 0);
  68         assert_se(socket_address_parse(&a, "[::1]:65536") < 0);
  69         assert_se(socket_address_parse(&a, "[a:b:1]:8888") < 0);
  70
  71         assert_se(socket_address_parse(&a, "8888") >= 0);
  72         assert_se(a.sockaddr.sa.sa_family == (socket_ipv6_is_supported() ? AF_INET6 : AF_INET));
  73
  74         assert_se(socket_address_parse(&a, "[2001:0db8:0000:85a3:0000:0000:ac1f:8001]:8888") >= 0);
  75         assert_se(a.sockaddr.sa.sa_family == AF_INET6);
  76
  77         assert_se(socket_address_parse(&a, "[::1]:8888") >= 0);
  78         assert_se(a.sockaddr.sa.sa_family == AF_INET6);
  79
  80         assert_se(socket_address_parse(&a, "192.168.1.254:8888") >= 0);
  81         assert_se(a.sockaddr.sa.sa_family == AF_INET);
  82
  83         assert_se(socket_address_parse(&a, "/foo/bar") >= 0);
  84         assert_se(a.sockaddr.sa.sa_family == AF_UNIX);
  85
  86         assert_se(socket_address_parse(&a, "@abstract") >= 0);
  87         assert_se(a.sockaddr.sa.sa_family == AF_UNIX);
  88
  89         assert_se(socket_address_parse(&a, "vsock::1234") >= 0);
  90         assert_se(a.sockaddr.sa.sa_family == AF_VSOCK);
  91         assert_se(socket_address_parse(&a, "vsock:2:1234") >= 0);
  92         assert_se(a.sockaddr.sa.sa_family == AF_VSOCK);
  93         assert_se(socket_address_parse(&a, "vsock:2:1234x") < 0);
  94         assert_se(socket_address_parse(&a, "vsock:2x:1234") < 0);
  95         assert_se(socket_address_parse(&a, "vsock:2") < 0);
  96 }
  97
  98 static void test_socket_address_parse_netlink(void) {
  99         SocketAddress a;
 100
 101         assert_se(socket_address_parse_netlink(&a, "junk") < 0);
 102         assert_se(socket_address_parse_netlink(&a, "") < 0);
 103
 104         assert_se(socket_address_parse_netlink(&a, "route") >= 0);
 105         assert_se(socket_address_parse_netlink(&a, "route 10") >= 0);
 106         assert_se(a.sockaddr.sa.sa_family == AF_NETLINK);
 107         assert_se(a.protocol == NETLINK_ROUTE);
 108
 109         /* With spaces and tabs */
 110         assert_se(socket_address_parse_netlink(&a, " kobject-uevent ") >= 0);
 111         assert_se(socket_address_parse_netlink(&a, " \t kobject-uevent \t 10 \t") >= 0);
 112         assert_se(a.sockaddr.sa.sa_family == AF_NETLINK);
 113         assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
 114
 115         assert_se(socket_address_parse_netlink(&a, "kobject-uevent\t10") >= 0);
 116         assert_se(a.sockaddr.sa.sa_family == AF_NETLINK);
 117         assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
 118
 119         /* oss-fuzz #6884 */
 120         assert_se(socket_address_parse_netlink(&a, "\xff") < 0);
 121 }
 122
 123 static void test_socket_address_equal(void) {
 124         SocketAddress a;
 125         SocketAddress b;
 126
 127         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 128         assert_se(socket_address_parse(&b, "192.168.1.1:888") >= 0);
 129         assert_se(!socket_address_equal(&a, &b));
 130
 131         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 132         assert_se(socket_address_parse(&b, "192.16.1.1:8888") >= 0);
 133         assert_se(!socket_address_equal(&a, &b));
 134
 135         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 136         assert_se(socket_address_parse(&b, "8888") >= 0);
 137         assert_se(!socket_address_equal(&a, &b));
 138
 139         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 140         assert_se(socket_address_parse(&b, "/foo/bar/") >= 0);
 141         assert_se(!socket_address_equal(&a, &b));
 142
 143         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 144         assert_se(socket_address_parse(&b, "192.168.1.1:8888") >= 0);
 145         assert_se(socket_address_equal(&a, &b));
 146
 147         assert_se(socket_address_parse(&a, "/foo/bar") >= 0);
 148         assert_se(socket_address_parse(&b, "/foo/bar") >= 0);
 149         assert_se(socket_address_equal(&a, &b));
 150
 151         assert_se(socket_address_parse(&a, "[::1]:8888") >= 0);
 152         assert_se(socket_address_parse(&b, "[::1]:8888") >= 0);
 153         assert_se(socket_address_equal(&a, &b));
 154
 155         assert_se(socket_address_parse(&a, "@abstract") >= 0);
 156         assert_se(socket_address_parse(&b, "@abstract") >= 0);
 157         assert_se(socket_address_equal(&a, &b));
 158
 159         assert_se(socket_address_parse_netlink(&a, "firewall") >= 0);
 160         assert_se(socket_address_parse_netlink(&b, "firewall") >= 0);
 161         assert_se(socket_address_equal(&a, &b));
 162
 163         assert_se(socket_address_parse(&a, "vsock:2:1234") >= 0);
 164         assert_se(socket_address_parse(&b, "vsock:2:1234") >= 0);
 165         assert_se(socket_address_equal(&a, &b));
 166         assert_se(socket_address_parse(&b, "vsock:2:1235") >= 0);
 167         assert_se(!socket_address_equal(&a, &b));
 168         assert_se(socket_address_parse(&b, "vsock:3:1234") >= 0);
 169         assert_se(!socket_address_equal(&a, &b));
 170 }
 171
 172 static void test_socket_address_get_path(void) {
 173         SocketAddress a;
 174
 175         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 176         assert_se(!socket_address_get_path(&a));
 177
 178         assert_se(socket_address_parse(&a, "@abstract") >= 0);
 179         assert_se(!socket_address_get_path(&a));
 180
 181         assert_se(socket_address_parse(&a, "[::1]:8888") >= 0);
 182         assert_se(!socket_address_get_path(&a));
 183
 184         assert_se(socket_address_parse(&a, "/foo/bar") >= 0);
 185         assert_se(streq(socket_address_get_path(&a), "/foo/bar"));
 186
 187         assert_se(socket_address_parse(&a, "vsock:2:1234") >= 0);
 188         assert_se(!socket_address_get_path(&a));
 189 }
 190
 191 static void test_socket_address_is(void) {
 192         SocketAddress a;
 193
 194         assert_se(socket_address_parse(&a, "192.168.1.1:8888") >= 0);
 195         assert_se(socket_address_is(&a, "192.168.1.1:8888", SOCK_STREAM));
 196         assert_se(!socket_address_is(&a, "route", SOCK_STREAM));
 197         assert_se(!socket_address_is(&a, "192.168.1.1:8888", SOCK_RAW));
 198 }
 199
 200 static void test_socket_address_is_netlink(void) {
 201         SocketAddress a;
 202
 203         assert_se(socket_address_parse_netlink(&a, "route 10") >= 0);
 204         assert_se(socket_address_is_netlink(&a, "route 10"));
 205         assert_se(!socket_address_is_netlink(&a, "192.168.1.1:8888"));
 206         assert_se(!socket_address_is_netlink(&a, "route 1"));
 207 }
 208
 209 static void test_in_addr_is_null(void) {
 210
 211         union in_addr_union i = {};
 212
 213         assert_se(in_addr_is_null(AF_INET, &i) == true);
 214         assert_se(in_addr_is_null(AF_INET6, &i) == true);
 215
 216         i.in.s_addr = 0x1000000;
 217         assert_se(in_addr_is_null(AF_INET, &i) == false);
 218         assert_se(in_addr_is_null(AF_INET6, &i) == false);
 219
 220         assert_se(in_addr_is_null(-1, &i) == -EAFNOSUPPORT);
 221 }
 222
 223 static void test_in_addr_prefix_intersect_one(unsigned f, const char *a, unsigned apl, const char *b, unsigned bpl, int result) {
 224         union in_addr_union ua, ub;
 225
 226         assert_se(in_addr_from_string(f, a, &ua) >= 0);
 227         assert_se(in_addr_from_string(f, b, &ub) >= 0);
 228
 229         assert_se(in_addr_prefix_intersect(f, &ua, apl, &ub, bpl) == result);
 230 }
 231
 232 static void test_in_addr_prefix_intersect(void) {
 233
 234         test_in_addr_prefix_intersect_one(AF_INET, "255.255.255.255", 32, "255.255.255.254", 32, 0);
 235         test_in_addr_prefix_intersect_one(AF_INET, "255.255.255.255", 0, "255.255.255.255", 32, 1);
 236         test_in_addr_prefix_intersect_one(AF_INET, "0.0.0.0", 0, "47.11.8.15", 32, 1);
 237
 238         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.1", 24, 1);
 239         test_in_addr_prefix_intersect_one(AF_INET, "2.2.2.2", 24, "1.1.1.1", 24, 0);
 240
 241         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.127", 25, 1);
 242         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 24, "1.1.1.127", 26, 1);
 243         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 25, "1.1.1.127", 25, 1);
 244         test_in_addr_prefix_intersect_one(AF_INET, "1.1.1.1", 25, "1.1.1.255", 25, 0);
 245
 246         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);
 247         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);
 248         test_in_addr_prefix_intersect_one(AF_INET6, "::", 0, "beef:beef:beef:beef:beef:beef:beef:beef", 128, 1);
 249
 250         test_in_addr_prefix_intersect_one(AF_INET6, "1::2", 64, "1::2", 64, 1);
 251         test_in_addr_prefix_intersect_one(AF_INET6, "2::2", 64, "1::2", 64, 0);
 252
 253         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 120, "1::007f", 121, 1);
 254         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 120, "1::007f", 122, 1);
 255         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 121, "1::007f", 121, 1);
 256         test_in_addr_prefix_intersect_one(AF_INET6, "1::1", 121, "1::00ff", 121, 0);
 257 }
 258
 259 static void test_in_addr_prefix_next_one(unsigned f, const char *before, unsigned pl, const char *after) {
 260         union in_addr_union ubefore, uafter, t;
 261
 262         assert_se(in_addr_from_string(f, before, &ubefore) >= 0);
 263
 264         t = ubefore;
 265         assert_se((in_addr_prefix_next(f, &t, pl) > 0) == !!after);
 266
 267         if (after) {
 268                 assert_se(in_addr_from_string(f, after, &uafter) >= 0);
 269                 assert_se(in_addr_equal(f, &t, &uafter) > 0);
 270         }
 271 }
 272
 273 static void test_in_addr_prefix_next(void) {
 274
 275         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 24, "192.168.1.0");
 276         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 16, "192.169.0.0");
 277         test_in_addr_prefix_next_one(AF_INET, "192.168.0.0", 20, "192.168.16.0");
 278
 279         test_in_addr_prefix_next_one(AF_INET, "0.0.0.0", 32, "0.0.0.1");
 280         test_in_addr_prefix_next_one(AF_INET, "255.255.255.255", 32, NULL);
 281         test_in_addr_prefix_next_one(AF_INET, "255.255.255.0", 24, NULL);
 282
 283         test_in_addr_prefix_next_one(AF_INET6, "4400::", 128, "4400::0001");
 284         test_in_addr_prefix_next_one(AF_INET6, "4400::", 120, "4400::0100");
 285         test_in_addr_prefix_next_one(AF_INET6, "4400::", 127, "4400::0002");
 286         test_in_addr_prefix_next_one(AF_INET6, "4400::", 8, "4500::");
 287         test_in_addr_prefix_next_one(AF_INET6, "4400::", 7, "4600::");
 288
 289         test_in_addr_prefix_next_one(AF_INET6, "::", 128, "::1");
 290
 291         test_in_addr_prefix_next_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", 128, NULL);
 292         test_in_addr_prefix_next_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00", 120, NULL);
 293
 294 }
 295
 296 static void test_in_addr_to_string_one(int f, const char *addr) {
 297         union in_addr_union ua;
 298         _cleanup_free_ char *r = NULL;
 299
 300         assert_se(in_addr_from_string(f, addr, &ua) >= 0);
 301         assert_se(in_addr_to_string(f, &ua, &r) >= 0);
 302         printf("test_in_addr_to_string_one: %s == %s\n", addr, r);
 303         assert_se(streq(addr, r));
 304 }
 305
 306 static void test_in_addr_to_string(void) {
 307         test_in_addr_to_string_one(AF_INET, "192.168.0.1");
 308         test_in_addr_to_string_one(AF_INET, "10.11.12.13");
 309         test_in_addr_to_string_one(AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff");
 310         test_in_addr_to_string_one(AF_INET6, "::1");
 311         test_in_addr_to_string_one(AF_INET6, "fe80::");
 312 }
 313
 314 static void test_in_addr_ifindex_to_string_one(int f, const char *a, int ifindex, const char *b) {
 315         _cleanup_free_ char *r = NULL;
 316         union in_addr_union ua, uuaa;
 317         int ff, ifindex2;
 318
 319         assert_se(in_addr_from_string(f, a, &ua) >= 0);
 320         assert_se(in_addr_ifindex_to_string(f, &ua, ifindex, &r) >= 0);
 321         printf("test_in_addr_ifindex_to_string_one: %s == %s\n", b, r);
 322         assert_se(streq(b, r));
 323
 324         assert_se(in_addr_ifindex_from_string_auto(b, &ff, &uuaa, &ifindex2) >= 0);
 325         assert_se(ff == f);
 326         assert_se(in_addr_equal(f, &ua, &uuaa));
 327         assert_se(ifindex2 == ifindex || ifindex2 == 0);
 328 }
 329
 330 static void test_in_addr_ifindex_to_string(void) {
 331         test_in_addr_ifindex_to_string_one(AF_INET, "192.168.0.1", 7, "192.168.0.1");
 332         test_in_addr_ifindex_to_string_one(AF_INET, "10.11.12.13", 9, "10.11.12.13");
 333         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");
 334         test_in_addr_ifindex_to_string_one(AF_INET6, "::1", 11, "::1");
 335         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::", 12, "fe80::%12");
 336         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::", 0, "fe80::");
 337         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::14", 12, "fe80::14%12");
 338         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::15", -7, "fe80::15");
 339         test_in_addr_ifindex_to_string_one(AF_INET6, "fe80::16", LOOPBACK_IFINDEX, "fe80::16%1");
 340 }
 341
 342 static void test_in_addr_ifindex_from_string_auto(void) {
 343         int family, ifindex;
 344         union in_addr_union ua;
 345
 346         /* Most in_addr_ifindex_from_string_auto() invocations have already been tested above, but let's test some more */
 347
 348         assert_se(in_addr_ifindex_from_string_auto("fe80::17", &family, &ua, &ifindex) >= 0);
 349         assert_se(family == AF_INET6);
 350         assert_se(ifindex == 0);
 351
 352         assert_se(in_addr_ifindex_from_string_auto("fe80::18%19", &family, &ua, &ifindex) >= 0);
 353         assert_se(family == AF_INET6);
 354         assert_se(ifindex == 19);
 355
 356         assert_se(in_addr_ifindex_from_string_auto("fe80::18%lo", &family, &ua, &ifindex) >= 0);
 357         assert_se(family == AF_INET6);
 358         assert_se(ifindex == LOOPBACK_IFINDEX);
 359
 360         assert_se(in_addr_ifindex_from_string_auto("fe80::19%thisinterfacecantexist", &family, &ua, &ifindex) == -ENODEV);
 361 }
 362
 363 static void test_sockaddr_equal(void) {
 364         union sockaddr_union a = {
 365                 .in.sin_family = AF_INET,
 366                 .in.sin_port = 0,
 367                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
 368         };
 369         union sockaddr_union b = {
 370                 .in.sin_family = AF_INET,
 371                 .in.sin_port = 0,
 372                 .in.sin_addr.s_addr = htobe32(INADDR_ANY),
 373         };
 374         union sockaddr_union c = {
 375                 .in.sin_family = AF_INET,
 376                 .in.sin_port = 0,
 377                 .in.sin_addr.s_addr = htobe32(1234),
 378         };
 379         union sockaddr_union d = {
 380                 .in6.sin6_family = AF_INET6,
 381                 .in6.sin6_port = 0,
 382                 .in6.sin6_addr = IN6ADDR_ANY_INIT,
 383         };
 384         union sockaddr_union e = {
 385                 .vm.svm_family = AF_VSOCK,
 386                 .vm.svm_port = 0,
 387                 .vm.svm_cid = VMADDR_CID_ANY,
 388         };
 389         assert_se(sockaddr_equal(&a, &a));
 390         assert_se(sockaddr_equal(&a, &b));
 391         assert_se(sockaddr_equal(&d, &d));
 392         assert_se(sockaddr_equal(&e, &e));
 393         assert_se(!sockaddr_equal(&a, &c));
 394         assert_se(!sockaddr_equal(&b, &c));
 395         assert_se(!sockaddr_equal(&a, &e));
 396 }
 397
 398 static void test_sockaddr_un_len(void) {
 399         static const struct sockaddr_un fs = {
 400                 .sun_family = AF_UNIX,
 401                 .sun_path = "/foo/bar/waldo",
 402         };
 403
 404         static const struct sockaddr_un abstract = {
 405                 .sun_family = AF_UNIX,
 406                 .sun_path = "\0foobar",
 407         };
 408
 409         assert_se(SOCKADDR_UN_LEN(fs) == offsetof(struct sockaddr_un, sun_path) + strlen(fs.sun_path));
 410         assert_se(SOCKADDR_UN_LEN(abstract) == offsetof(struct sockaddr_un, sun_path) + 1 + strlen(abstract.sun_path + 1));
 411 }
 412
 413 static void test_in_addr_is_multicast(void) {
 414         union in_addr_union a, b;
 415         int f;
 416
 417         assert_se(in_addr_from_string_auto("192.168.3.11", &f, &a) >= 0);
 418         assert_se(in_addr_is_multicast(f, &a) == 0);
 419
 420         assert_se(in_addr_from_string_auto("224.0.0.1", &f, &a) >= 0);
 421         assert_se(in_addr_is_multicast(f, &a) == 1);
 422
 423         assert_se(in_addr_from_string_auto("FF01:0:0:0:0:0:0:1", &f, &b) >= 0);
 424         assert_se(in_addr_is_multicast(f, &b) == 1);
 425
 426         assert_se(in_addr_from_string_auto("2001:db8::c:69b:aeff:fe53:743e", &f, &b) >= 0);
 427         assert_se(in_addr_is_multicast(f, &b) == 0);
 428 }
 429
 430 static void test_getpeercred_getpeergroups(void) {
 431         int r;
 432
 433         r = safe_fork("(getpeercred)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
 434         assert_se(r >= 0);
 435
 436         if (r == 0) {
 437                 static const gid_t gids[] = { 3, 4, 5, 6, 7 };
 438                 gid_t *test_gids;
 439                 _cleanup_free_ gid_t *peer_groups = NULL;
 440                 size_t n_test_gids;
 441                 uid_t test_uid;
 442                 gid_t test_gid;
 443                 struct ucred ucred;
 444                 int pair[2];
 445
 446                 if (geteuid() == 0) {
 447                         test_uid = 1;
 448                         test_gid = 2;
 449                         test_gids = (gid_t*) gids;
 450                         n_test_gids = ELEMENTSOF(gids);
 451
 452                         assert_se(setgroups(n_test_gids, test_gids) >= 0);
 453                         assert_se(setresgid(test_gid, test_gid, test_gid) >= 0);
 454                         assert_se(setresuid(test_uid, test_uid, test_uid) >= 0);
 455
 456                 } else {
 457                         long ngroups_max;
 458
 459                         test_uid = getuid();
 460                         test_gid = getgid();
 461
 462                         ngroups_max = sysconf(_SC_NGROUPS_MAX);
 463                         assert(ngroups_max > 0);
 464
 465                         test_gids = newa(gid_t, ngroups_max);
 466
 467                         r = getgroups(ngroups_max, test_gids);
 468                         assert_se(r >= 0);
 469                         n_test_gids = (size_t) r;
 470                 }
 471
 472                 assert_se(socketpair(AF_UNIX, SOCK_STREAM, 0, pair) >= 0);
 473
 474                 assert_se(getpeercred(pair[0], &ucred) >= 0);
 475
 476                 assert_se(ucred.uid == test_uid);
 477                 assert_se(ucred.gid == test_gid);
 478                 assert_se(ucred.pid == getpid_cached());
 479
 480                 r = getpeergroups(pair[0], &peer_groups);
 481                 assert_se(r >= 0 || IN_SET(r, -EOPNOTSUPP, -ENOPROTOOPT));
 482
 483                 if (r >= 0) {
 484                         assert_se((size_t) r == n_test_gids);
 485                         assert_se(memcmp(peer_groups, test_gids, sizeof(gid_t) * n_test_gids) == 0);
 486                 }
 487
 488                 safe_close_pair(pair);
 489         }
 490 }
 491
 492 int main(int argc, char *argv[]) {
 493
 494         log_set_max_level(LOG_DEBUG);
 495
 496         test_ifname_valid();
 497
 498         test_socket_address_parse();
 499         test_socket_address_parse_netlink();
 500         test_socket_address_equal();
 501         test_socket_address_get_path();
 502         test_socket_address_is();
 503         test_socket_address_is_netlink();
 504
 505         test_in_addr_is_null();
 506         test_in_addr_prefix_intersect();
 507         test_in_addr_prefix_next();
 508         test_in_addr_to_string();
 509         test_in_addr_ifindex_to_string();
 510         test_in_addr_ifindex_from_string_auto();
 511
 512         test_sockaddr_equal();
 513
 514         test_sockaddr_un_len();
 515
 516         test_in_addr_is_multicast();
 517
 518         test_getpeercred_getpeergroups();
 519
 520         return 0;
 521 }