tests/unit/test-util-sockets.c

   1 /*
   2  * Tests for util/qemu-sockets.c
   3  *
   4  * Copyright 2018 Red Hat, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "qemu-common.h"
  23 #include "qemu/sockets.h"
  24 #include "qapi/error.h"
  25 #include "socket-helpers.h"
  26 #include "monitor/monitor.h"
  27
  28 static void test_fd_is_socket_bad(void)
  29 {
  30     char *tmp = g_strdup("qemu-test-util-sockets-XXXXXX");
  31     int fd = mkstemp(tmp);
  32     if (fd != 0) {
  33         unlink(tmp);
  34     }
  35     g_free(tmp);
  36
  37     g_assert(fd >= 0);
  38
  39     g_assert(!fd_is_socket(fd));
  40     close(fd);
  41 }
  42
  43 static void test_fd_is_socket_good(void)
  44 {
  45     int fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
  46
  47     g_assert(fd >= 0);
  48
  49     g_assert(fd_is_socket(fd));
  50     close(fd);
  51 }
  52
  53 static int mon_fd = -1;
  54 static const char *mon_fdname;
  55 __thread Monitor *cur_mon;
  56
  57 int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp)
  58 {
  59     g_assert(cur_mon);
  60     g_assert(mon == cur_mon);
  61     if (mon_fd == -1 || !g_str_equal(mon_fdname, fdname)) {
  62         error_setg(errp, "No fd named %s", fdname);
  63         return -1;
  64     }
  65     return dup(mon_fd);
  66 }
  67
  68 /*
  69  * Syms of stubs in libqemuutil.a are discarded at .o file
  70  * granularity.  To replace monitor_get_fd() and monitor_cur(), we
  71  * must ensure that we also replace any other symbol that is used in
  72  * the binary and would be taken from the same stub object file,
  73  * otherwise we get duplicate syms at link time.
  74  */
  75 Monitor *monitor_cur(void) { return cur_mon; }
  76 int monitor_vprintf(Monitor *mon, const char *fmt, va_list ap) { abort(); }
  77
  78 #ifndef _WIN32
  79 static void test_socket_fd_pass_name_good(void)
  80 {
  81     SocketAddress addr;
  82     int fd;
  83
  84     cur_mon = g_malloc(1); /* Fake a monitor */
  85     mon_fdname = "myfd";
  86     mon_fd = qemu_socket(AF_INET, SOCK_STREAM, 0);
  87     g_assert_cmpint(mon_fd, >, STDERR_FILENO);
  88
  89     addr.type = SOCKET_ADDRESS_TYPE_FD;
  90     addr.u.fd.str = g_strdup(mon_fdname);
  91
  92     fd = socket_connect(&addr, &error_abort);
  93     g_assert_cmpint(fd, !=, -1);
  94     g_assert_cmpint(fd, !=, mon_fd);
  95     close(fd);
  96
  97     fd = socket_listen(&addr, 1, &error_abort);
  98     g_assert_cmpint(fd, !=, -1);
  99     g_assert_cmpint(fd, !=, mon_fd);
 100     close(fd);
 101
 102     g_free(addr.u.fd.str);
 103     mon_fdname = NULL;
 104     close(mon_fd);
 105     mon_fd = -1;
 106     g_free(cur_mon);
 107     cur_mon = NULL;
 108 }
 109
 110 static void test_socket_fd_pass_name_bad(void)
 111 {
 112     SocketAddress addr;
 113     Error *err = NULL;
 114     int fd;
 115
 116     cur_mon = g_malloc(1); /* Fake a monitor */
 117     mon_fdname = "myfd";
 118     mon_fd = dup(STDOUT_FILENO);
 119     g_assert_cmpint(mon_fd, >, STDERR_FILENO);
 120
 121     addr.type = SOCKET_ADDRESS_TYPE_FD;
 122     addr.u.fd.str = g_strdup(mon_fdname);
 123
 124     fd = socket_connect(&addr, &err);
 125     g_assert_cmpint(fd, ==, -1);
 126     error_free_or_abort(&err);
 127
 128     fd = socket_listen(&addr, 1, &err);
 129     g_assert_cmpint(fd, ==, -1);
 130     error_free_or_abort(&err);
 131
 132     g_free(addr.u.fd.str);
 133     mon_fdname = NULL;
 134     close(mon_fd);
 135     mon_fd = -1;
 136     g_free(cur_mon);
 137     cur_mon = NULL;
 138 }
 139
 140 static void test_socket_fd_pass_name_nomon(void)
 141 {
 142     SocketAddress addr;
 143     Error *err = NULL;
 144     int fd;
 145
 146     g_assert(cur_mon == NULL);
 147
 148     addr.type = SOCKET_ADDRESS_TYPE_FD;
 149     addr.u.fd.str = g_strdup("myfd");
 150
 151     fd = socket_connect(&addr, &err);
 152     g_assert_cmpint(fd, ==, -1);
 153     error_free_or_abort(&err);
 154
 155     fd = socket_listen(&addr, 1, &err);
 156     g_assert_cmpint(fd, ==, -1);
 157     error_free_or_abort(&err);
 158
 159     g_free(addr.u.fd.str);
 160 }
 161
 162
 163 static void test_socket_fd_pass_num_good(void)
 164 {
 165     SocketAddress addr;
 166     int fd, sfd;
 167
 168     g_assert(cur_mon == NULL);
 169     sfd = qemu_socket(AF_INET, SOCK_STREAM, 0);
 170     g_assert_cmpint(sfd, >, STDERR_FILENO);
 171
 172     addr.type = SOCKET_ADDRESS_TYPE_FD;
 173     addr.u.fd.str = g_strdup_printf("%d", sfd);
 174
 175     fd = socket_connect(&addr, &error_abort);
 176     g_assert_cmpint(fd, ==, sfd);
 177
 178     fd = socket_listen(&addr, 1, &error_abort);
 179     g_assert_cmpint(fd, ==, sfd);
 180
 181     g_free(addr.u.fd.str);
 182     close(sfd);
 183 }
 184
 185 static void test_socket_fd_pass_num_bad(void)
 186 {
 187     SocketAddress addr;
 188     Error *err = NULL;
 189     int fd, sfd;
 190
 191     g_assert(cur_mon == NULL);
 192     sfd = dup(STDOUT_FILENO);
 193
 194     addr.type = SOCKET_ADDRESS_TYPE_FD;
 195     addr.u.fd.str = g_strdup_printf("%d", sfd);
 196
 197     fd = socket_connect(&addr, &err);
 198     g_assert_cmpint(fd, ==, -1);
 199     error_free_or_abort(&err);
 200
 201     fd = socket_listen(&addr, 1, &err);
 202     g_assert_cmpint(fd, ==, -1);
 203     error_free_or_abort(&err);
 204
 205     g_free(addr.u.fd.str);
 206     close(sfd);
 207 }
 208
 209 static void test_socket_fd_pass_num_nocli(void)
 210 {
 211     SocketAddress addr;
 212     Error *err = NULL;
 213     int fd;
 214
 215     cur_mon = g_malloc(1); /* Fake a monitor */
 216
 217     addr.type = SOCKET_ADDRESS_TYPE_FD;
 218     addr.u.fd.str = g_strdup_printf("%d", STDOUT_FILENO);
 219
 220     fd = socket_connect(&addr, &err);
 221     g_assert_cmpint(fd, ==, -1);
 222     error_free_or_abort(&err);
 223
 224     fd = socket_listen(&addr, 1, &err);
 225     g_assert_cmpint(fd, ==, -1);
 226     error_free_or_abort(&err);
 227
 228     g_free(addr.u.fd.str);
 229 }
 230 #endif
 231
 232 #ifdef CONFIG_LINUX
 233
 234 #define ABSTRACT_SOCKET_VARIANTS 3
 235
 236 typedef struct {
 237     SocketAddress *server, *client[ABSTRACT_SOCKET_VARIANTS];
 238     bool expect_connect[ABSTRACT_SOCKET_VARIANTS];
 239 } abstract_socket_matrix_row;
 240
 241 static gpointer unix_client_thread_func(gpointer user_data)
 242 {
 243     abstract_socket_matrix_row *row = user_data;
 244     Error *err = NULL;
 245     int i, fd;
 246
 247     for (i = 0; i < ABSTRACT_SOCKET_VARIANTS; i++) {
 248         if (row->expect_connect[i]) {
 249             fd = socket_connect(row->client[i], &error_abort);
 250             g_assert_cmpint(fd, >=, 0);
 251         } else {
 252             fd = socket_connect(row->client[i], &err);
 253             g_assert_cmpint(fd, ==, -1);
 254             error_free_or_abort(&err);
 255         }
 256         close(fd);
 257     }
 258     return NULL;
 259 }
 260
 261 static void test_socket_unix_abstract_row(abstract_socket_matrix_row *test)
 262 {
 263     int fd, connfd, i;
 264     GThread *cli;
 265     struct sockaddr_un un;
 266     socklen_t len = sizeof(un);
 267
 268     /* Last one must connect, or else accept() below hangs */
 269     assert(test->expect_connect[ABSTRACT_SOCKET_VARIANTS - 1]);
 270
 271     fd = socket_listen(test->server, 1, &error_abort);
 272     g_assert_cmpint(fd, >=, 0);
 273     g_assert(fd_is_socket(fd));
 274
 275     cli = g_thread_new("abstract_unix_client",
 276                        unix_client_thread_func,
 277                        test);
 278
 279     for (i = 0; i < ABSTRACT_SOCKET_VARIANTS; i++) {
 280         if (test->expect_connect[i]) {
 281             connfd = accept(fd, (struct sockaddr *)&un, &len);
 282             g_assert_cmpint(connfd, !=, -1);
 283             close(connfd);
 284         }
 285     }
 286
 287     close(fd);
 288     g_thread_join(cli);
 289 }
 290
 291 static void test_socket_unix_abstract(void)
 292 {
 293     SocketAddress addr, addr_tight, addr_padded;
 294     abstract_socket_matrix_row matrix[ABSTRACT_SOCKET_VARIANTS] = {
 295         { &addr,
 296           { &addr_tight, &addr_padded, &addr },
 297           { true, false, true } },
 298         { &addr_tight,
 299           { &addr_padded, &addr, &addr_tight },
 300           { false, true, true } },
 301         { &addr_padded,
 302           { &addr, &addr_tight, &addr_padded },
 303           { false, false, true } }
 304     };
 305     int i;
 306
 307     addr.type = SOCKET_ADDRESS_TYPE_UNIX;
 308     addr.u.q_unix.path = g_strdup_printf("unix-%d-%u",
 309                                          getpid(), g_random_int());
 310     addr.u.q_unix.has_abstract = true;
 311     addr.u.q_unix.abstract = true;
 312     addr.u.q_unix.has_tight = false;
 313     addr.u.q_unix.tight = false;
 314
 315     addr_tight = addr;
 316     addr_tight.u.q_unix.has_tight = true;
 317     addr_tight.u.q_unix.tight = true;
 318
 319     addr_padded = addr;
 320     addr_padded.u.q_unix.has_tight = true;
 321     addr_padded.u.q_unix.tight = false;
 322
 323     for (i = 0; i < ABSTRACT_SOCKET_VARIANTS; i++) {
 324         test_socket_unix_abstract_row(&matrix[i]);
 325     }
 326
 327     g_free(addr.u.q_unix.path);
 328 }
 329
 330 #endif  /* CONFIG_LINUX */
 331
 332 int main(int argc, char **argv)
 333 {
 334     bool has_ipv4, has_ipv6;
 335
 336     qemu_init_main_loop(&error_abort);
 337     socket_init();
 338
 339     g_test_init(&argc, &argv, NULL);
 340
 341     /* We're creating actual IPv4/6 sockets, so we should
 342      * check if the host running tests actually supports
 343      * each protocol to avoid breaking tests on machines
 344      * with either IPv4 or IPv6 disabled.
 345      */
 346     if (socket_check_protocol_support(&has_ipv4, &has_ipv6) < 0) {
 347         g_printerr("socket_check_protocol_support() failed\n");
 348         goto end;
 349     }
 350
 351     if (has_ipv4) {
 352         g_test_add_func("/util/socket/is-socket/bad",
 353                         test_fd_is_socket_bad);
 354         g_test_add_func("/util/socket/is-socket/good",
 355                         test_fd_is_socket_good);
 356 #ifndef _WIN32
 357         g_test_add_func("/socket/fd-pass/name/good",
 358                         test_socket_fd_pass_name_good);
 359         g_test_add_func("/socket/fd-pass/name/bad",
 360                         test_socket_fd_pass_name_bad);
 361         g_test_add_func("/socket/fd-pass/name/nomon",
 362                         test_socket_fd_pass_name_nomon);
 363         g_test_add_func("/socket/fd-pass/num/good",
 364                         test_socket_fd_pass_num_good);
 365         g_test_add_func("/socket/fd-pass/num/bad",
 366                         test_socket_fd_pass_num_bad);
 367         g_test_add_func("/socket/fd-pass/num/nocli",
 368                         test_socket_fd_pass_num_nocli);
 369 #endif
 370     }
 371
 372 #ifdef CONFIG_LINUX
 373     g_test_add_func("/util/socket/unix-abstract",
 374                     test_socket_unix_abstract);
 375 #endif
 376
 377 end:
 378     return g_test_run();
 379 }