src/test/test-socket-util.c

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