src/test/test-socket-util.c

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