util/oslib-win32.c

   1 /*
   2  * os-win32.c
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2010-2016 Red Hat, Inc.
   6  *
   7  * QEMU library functions for win32 which are shared between QEMU and
   8  * the QEMU tools.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  *
  28  * The implementation of g_poll (functions poll_rest, g_poll) at the end of
  29  * this file are based on code from GNOME glib-2 and use a different license,
  30  * see the license comment there.
  31  */
  32 #include "qemu/osdep.h"
  33 #include <windows.h>
  34 #include "qapi/error.h"
  35 #include "sysemu/sysemu.h"
  36 #include "qemu/main-loop.h"
  37 #include "trace.h"
  38 #include "qemu/sockets.h"
  39 #include "qemu/cutils.h"
  40
  41 /* this must come after including "trace.h" */
  42 #include <shlobj.h>
  43
  44 void *qemu_oom_check(void *ptr)
  45 {
  46     if (ptr == NULL) {
  47         fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
  48         abort();
  49     }
  50     return ptr;
  51 }
  52
  53 void *qemu_try_memalign(size_t alignment, size_t size)
  54 {
  55     void *ptr;
  56
  57     if (!size) {
  58         abort();
  59     }
  60     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  61     trace_qemu_memalign(alignment, size, ptr);
  62     return ptr;
  63 }
  64
  65 void *qemu_memalign(size_t alignment, size_t size)
  66 {
  67     return qemu_oom_check(qemu_try_memalign(alignment, size));
  68 }
  69
  70 void *qemu_anon_ram_alloc(size_t size, uint64_t *align)
  71 {
  72     void *ptr;
  73
  74     /* FIXME: this is not exactly optimal solution since VirtualAlloc
  75        has 64Kb granularity, but at least it guarantees us that the
  76        memory is page aligned. */
  77     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  78     trace_qemu_anon_ram_alloc(size, ptr);
  79     return ptr;
  80 }
  81
  82 void qemu_vfree(void *ptr)
  83 {
  84     trace_qemu_vfree(ptr);
  85     if (ptr) {
  86         VirtualFree(ptr, 0, MEM_RELEASE);
  87     }
  88 }
  89
  90 void qemu_anon_ram_free(void *ptr, size_t size)
  91 {
  92     trace_qemu_anon_ram_free(ptr, size);
  93     if (ptr) {
  94         VirtualFree(ptr, 0, MEM_RELEASE);
  95     }
  96 }
  97
  98 #ifndef CONFIG_LOCALTIME_R
  99 /* FIXME: add proper locking */
 100 struct tm *gmtime_r(const time_t *timep, struct tm *result)
 101 {
 102     struct tm *p = gmtime(timep);
 103     memset(result, 0, sizeof(*result));
 104     if (p) {
 105         *result = *p;
 106         p = result;
 107     }
 108     return p;
 109 }
 110
 111 /* FIXME: add proper locking */
 112 struct tm *localtime_r(const time_t *timep, struct tm *result)
 113 {
 114     struct tm *p = localtime(timep);
 115     memset(result, 0, sizeof(*result));
 116     if (p) {
 117         *result = *p;
 118         p = result;
 119     }
 120     return p;
 121 }
 122 #endif /* CONFIG_LOCALTIME_R */
 123
 124 void qemu_set_block(int fd)
 125 {
 126     unsigned long opt = 0;
 127     WSAEventSelect(fd, NULL, 0);
 128     ioctlsocket(fd, FIONBIO, &opt);
 129 }
 130
 131 void qemu_set_nonblock(int fd)
 132 {
 133     unsigned long opt = 1;
 134     ioctlsocket(fd, FIONBIO, &opt);
 135     qemu_fd_register(fd);
 136 }
 137
 138 int socket_set_fast_reuse(int fd)
 139 {
 140     /* Enabling the reuse of an endpoint that was used by a socket still in
 141      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 142      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 143      * don't have to do anything here. More info can be found at:
 144      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 145     return 0;
 146 }
 147
 148
 149 static int socket_error(void)
 150 {
 151     switch (WSAGetLastError()) {
 152     case 0:
 153         return 0;
 154     case WSAEINTR:
 155         return EINTR;
 156     case WSAEINVAL:
 157         return EINVAL;
 158     case WSA_INVALID_HANDLE:
 159         return EBADF;
 160     case WSA_NOT_ENOUGH_MEMORY:
 161         return ENOMEM;
 162     case WSA_INVALID_PARAMETER:
 163         return EINVAL;
 164     case WSAENAMETOOLONG:
 165         return ENAMETOOLONG;
 166     case WSAENOTEMPTY:
 167         return ENOTEMPTY;
 168     case WSAEWOULDBLOCK:
 169          /* not using EWOULDBLOCK as we don't want code to have
 170           * to check both EWOULDBLOCK and EAGAIN */
 171         return EAGAIN;
 172     case WSAEINPROGRESS:
 173         return EINPROGRESS;
 174     case WSAEALREADY:
 175         return EALREADY;
 176     case WSAENOTSOCK:
 177         return ENOTSOCK;
 178     case WSAEDESTADDRREQ:
 179         return EDESTADDRREQ;
 180     case WSAEMSGSIZE:
 181         return EMSGSIZE;
 182     case WSAEPROTOTYPE:
 183         return EPROTOTYPE;
 184     case WSAENOPROTOOPT:
 185         return ENOPROTOOPT;
 186     case WSAEPROTONOSUPPORT:
 187         return EPROTONOSUPPORT;
 188     case WSAEOPNOTSUPP:
 189         return EOPNOTSUPP;
 190     case WSAEAFNOSUPPORT:
 191         return EAFNOSUPPORT;
 192     case WSAEADDRINUSE:
 193         return EADDRINUSE;
 194     case WSAEADDRNOTAVAIL:
 195         return EADDRNOTAVAIL;
 196     case WSAENETDOWN:
 197         return ENETDOWN;
 198     case WSAENETUNREACH:
 199         return ENETUNREACH;
 200     case WSAENETRESET:
 201         return ENETRESET;
 202     case WSAECONNABORTED:
 203         return ECONNABORTED;
 204     case WSAECONNRESET:
 205         return ECONNRESET;
 206     case WSAENOBUFS:
 207         return ENOBUFS;
 208     case WSAEISCONN:
 209         return EISCONN;
 210     case WSAENOTCONN:
 211         return ENOTCONN;
 212     case WSAETIMEDOUT:
 213         return ETIMEDOUT;
 214     case WSAECONNREFUSED:
 215         return ECONNREFUSED;
 216     case WSAELOOP:
 217         return ELOOP;
 218     case WSAEHOSTUNREACH:
 219         return EHOSTUNREACH;
 220     default:
 221         return EIO;
 222     }
 223 }
 224
 225 int inet_aton(const char *cp, struct in_addr *ia)
 226 {
 227     uint32_t addr = inet_addr(cp);
 228     if (addr == 0xffffffff) {
 229         return 0;
 230     }
 231     ia->s_addr = addr;
 232     return 1;
 233 }
 234
 235 void qemu_set_cloexec(int fd)
 236 {
 237 }
 238
 239 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 240 #define _W32_FT_OFFSET (116444736000000000ULL)
 241
 242 int qemu_gettimeofday(qemu_timeval *tp)
 243 {
 244   union {
 245     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
 246     FILETIME ft;
 247   }  _now;
 248
 249   if(tp) {
 250       GetSystemTimeAsFileTime (&_now.ft);
 251       tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
 252       tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
 253   }
 254   /* Always return 0 as per Open Group Base Specifications Issue 6.
 255      Do not set errno on error.  */
 256   return 0;
 257 }
 258
 259 int qemu_get_thread_id(void)
 260 {
 261     return GetCurrentThreadId();
 262 }
 263
 264 char *
 265 qemu_get_local_state_pathname(const char *relative_pathname)
 266 {
 267     HRESULT result;
 268     char base_path[MAX_PATH+1] = "";
 269
 270     result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
 271                              /* SHGFP_TYPE_CURRENT */ 0, base_path);
 272     if (result != S_OK) {
 273         /* misconfigured environment */
 274         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
 275         abort();
 276     }
 277     return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
 278                            relative_pathname);
 279 }
 280
 281 void qemu_set_tty_echo(int fd, bool echo)
 282 {
 283     HANDLE handle = (HANDLE)_get_osfhandle(fd);
 284     DWORD dwMode = 0;
 285
 286     if (handle == INVALID_HANDLE_VALUE) {
 287         return;
 288     }
 289
 290     GetConsoleMode(handle, &dwMode);
 291
 292     if (echo) {
 293         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
 294     } else {
 295         SetConsoleMode(handle,
 296                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
 297     }
 298 }
 299
 300 static char exec_dir[PATH_MAX];
 301
 302 void qemu_init_exec_dir(const char *argv0)
 303 {
 304
 305     char *p;
 306     char buf[MAX_PATH];
 307     DWORD len;
 308
 309     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
 310     if (len == 0) {
 311         return;
 312     }
 313
 314     buf[len] = 0;
 315     p = buf + len - 1;
 316     while (p != buf && *p != '\\') {
 317         p--;
 318     }
 319     *p = 0;
 320     if (access(buf, R_OK) == 0) {
 321         pstrcpy(exec_dir, sizeof(exec_dir), buf);
 322     }
 323 }
 324
 325 char *qemu_get_exec_dir(void)
 326 {
 327     return g_strdup(exec_dir);
 328 }
 329
 330 #if !GLIB_CHECK_VERSION(2, 50, 0)
 331 /*
 332  * The original implementation of g_poll from glib has a problem on Windows
 333  * when using timeouts < 10 ms.
 334  *
 335  * Whenever g_poll is called with timeout < 10 ms, it does a quick poll instead
 336  * of wait. This causes significant performance degradation of QEMU.
 337  *
 338  * The following code is a copy of the original code from glib/gpoll.c
 339  * (glib commit 20f4d1820b8d4d0fc4447188e33efffd6d4a88d8 from 2014-02-19).
 340  * Some debug code was removed and the code was reformatted.
 341  * All other code modifications are marked with 'QEMU'.
 342  */
 343
 344 /*
 345  * gpoll.c: poll(2) abstraction
 346  * Copyright 1998 Owen Taylor
 347  * Copyright 2008 Red Hat, Inc.
 348  *
 349  * This library is free software; you can redistribute it and/or
 350  * modify it under the terms of the GNU Lesser General Public
 351  * License as published by the Free Software Foundation; either
 352  * version 2 of the License, or (at your option) any later version.
 353  *
 354  * This library is distributed in the hope that it will be useful,
 355  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 356  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 357  * Lesser General Public License for more details.
 358  *
 359  * You should have received a copy of the GNU Lesser General Public
 360  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 361  */
 362
 363 static int poll_rest(gboolean poll_msgs, HANDLE *handles, gint nhandles,
 364                      GPollFD *fds, guint nfds, gint timeout)
 365 {
 366     DWORD ready;
 367     GPollFD *f;
 368     int recursed_result;
 369
 370     if (poll_msgs) {
 371         /* Wait for either messages or handles
 372          * -> Use MsgWaitForMultipleObjectsEx
 373          */
 374         ready = MsgWaitForMultipleObjectsEx(nhandles, handles, timeout,
 375                                             QS_ALLINPUT, MWMO_ALERTABLE);
 376
 377         if (ready == WAIT_FAILED) {
 378             gchar *emsg = g_win32_error_message(GetLastError());
 379             g_warning("MsgWaitForMultipleObjectsEx failed: %s", emsg);
 380             g_free(emsg);
 381         }
 382     } else if (nhandles == 0) {
 383         /* No handles to wait for, just the timeout */
 384         if (timeout == INFINITE) {
 385             ready = WAIT_FAILED;
 386         } else {
 387             SleepEx(timeout, TRUE);
 388             ready = WAIT_TIMEOUT;
 389         }
 390     } else {
 391         /* Wait for just handles
 392          * -> Use WaitForMultipleObjectsEx
 393          */
 394         ready =
 395             WaitForMultipleObjectsEx(nhandles, handles, FALSE, timeout, TRUE);
 396         if (ready == WAIT_FAILED) {
 397             gchar *emsg = g_win32_error_message(GetLastError());
 398             g_warning("WaitForMultipleObjectsEx failed: %s", emsg);
 399             g_free(emsg);
 400         }
 401     }
 402
 403     if (ready == WAIT_FAILED) {
 404         return -1;
 405     } else if (ready == WAIT_TIMEOUT || ready == WAIT_IO_COMPLETION) {
 406         return 0;
 407     } else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles) {
 408         for (f = fds; f < &fds[nfds]; ++f) {
 409             if (f->fd == G_WIN32_MSG_HANDLE && f->events & G_IO_IN) {
 410                 f->revents |= G_IO_IN;
 411             }
 412         }
 413
 414         /* If we have a timeout, or no handles to poll, be satisfied
 415          * with just noticing we have messages waiting.
 416          */
 417         if (timeout != 0 || nhandles == 0) {
 418             return 1;
 419         }
 420
 421         /* If no timeout and handles to poll, recurse to poll them,
 422          * too.
 423          */
 424         recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
 425         return (recursed_result == -1) ? -1 : 1 + recursed_result;
 426     } else if (/* QEMU: removed the following unneeded statement which causes
 427                 * a compiler warning: ready >= WAIT_OBJECT_0 && */
 428                ready < WAIT_OBJECT_0 + nhandles) {
 429         for (f = fds; f < &fds[nfds]; ++f) {
 430             if ((HANDLE) f->fd == handles[ready - WAIT_OBJECT_0]) {
 431                 f->revents = f->events;
 432             }
 433         }
 434
 435         /* If no timeout and polling several handles, recurse to poll
 436          * the rest of them.
 437          */
 438         if (timeout == 0 && nhandles > 1) {
 439             /* Remove the handle that fired */
 440             int i;
 441             for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++) {
 442                 handles[i-1] = handles[i];
 443             }
 444             nhandles--;
 445             recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
 446             return (recursed_result == -1) ? -1 : 1 + recursed_result;
 447         }
 448         return 1;
 449     }
 450
 451     return 0;
 452 }
 453
 454 gint g_poll(GPollFD *fds, guint nfds, gint timeout)
 455 {
 456     HANDLE handles[MAXIMUM_WAIT_OBJECTS];
 457     gboolean poll_msgs = FALSE;
 458     GPollFD *f;
 459     gint nhandles = 0;
 460     int retval;
 461
 462     for (f = fds; f < &fds[nfds]; ++f) {
 463         if (f->fd == G_WIN32_MSG_HANDLE && (f->events & G_IO_IN)) {
 464             poll_msgs = TRUE;
 465         } else if (f->fd > 0) {
 466             /* Don't add the same handle several times into the array, as
 467              * docs say that is not allowed, even if it actually does seem
 468              * to work.
 469              */
 470             gint i;
 471
 472             for (i = 0; i < nhandles; i++) {
 473                 if (handles[i] == (HANDLE) f->fd) {
 474                     break;
 475                 }
 476             }
 477
 478             if (i == nhandles) {
 479                 if (nhandles == MAXIMUM_WAIT_OBJECTS) {
 480                     g_warning("Too many handles to wait for!\n");
 481                     break;
 482                 } else {
 483                     handles[nhandles++] = (HANDLE) f->fd;
 484                 }
 485             }
 486         }
 487     }
 488
 489     for (f = fds; f < &fds[nfds]; ++f) {
 490         f->revents = 0;
 491     }
 492
 493     if (timeout == -1) {
 494         timeout = INFINITE;
 495     }
 496
 497     /* Polling for several things? */
 498     if (nhandles > 1 || (nhandles > 0 && poll_msgs)) {
 499         /* First check if one or several of them are immediately
 500          * available
 501          */
 502         retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, 0);
 503
 504         /* If not, and we have a significant timeout, poll again with
 505          * timeout then. Note that this will return indication for only
 506          * one event, or only for messages. We ignore timeouts less than
 507          * ten milliseconds as they are mostly pointless on Windows, the
 508          * MsgWaitForMultipleObjectsEx() call will timeout right away
 509          * anyway.
 510          *
 511          * Modification for QEMU: replaced timeout >= 10 by timeout > 0.
 512          */
 513         if (retval == 0 && (timeout == INFINITE || timeout > 0)) {
 514             retval = poll_rest(poll_msgs, handles, nhandles,
 515                                fds, nfds, timeout);
 516         }
 517     } else {
 518         /* Just polling for one thing, so no need to check first if
 519          * available immediately
 520          */
 521         retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, timeout);
 522     }
 523
 524     if (retval == -1) {
 525         for (f = fds; f < &fds[nfds]; ++f) {
 526             f->revents = 0;
 527         }
 528     }
 529
 530     return retval;
 531 }
 532 #endif
 533
 534 int getpagesize(void)
 535 {
 536     SYSTEM_INFO system_info;
 537
 538     GetSystemInfo(&system_info);
 539     return system_info.dwPageSize;
 540 }
 541
 542 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
 543                      Error **errp)
 544 {
 545     int i;
 546     size_t pagesize = getpagesize();
 547
 548     memory = (memory + pagesize - 1) & -pagesize;
 549     for (i = 0; i < memory / pagesize; i++) {
 550         memset(area + pagesize * i, 0, 1);
 551     }
 552 }
 553
 554
 555 char *qemu_get_pid_name(pid_t pid)
 556 {
 557     /* XXX Implement me */
 558     abort();
 559 }
 560
 561
 562 pid_t qemu_fork(Error **errp)
 563 {
 564     errno = ENOSYS;
 565     error_setg_errno(errp, errno,
 566                      "cannot fork child process");
 567     return -1;
 568 }
 569
 570
 571 #undef connect
 572 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
 573                       socklen_t addrlen)
 574 {
 575     int ret;
 576     ret = connect(sockfd, addr, addrlen);
 577     if (ret < 0) {
 578         errno = socket_error();
 579     }
 580     return ret;
 581 }
 582
 583
 584 #undef listen
 585 int qemu_listen_wrap(int sockfd, int backlog)
 586 {
 587     int ret;
 588     ret = listen(sockfd, backlog);
 589     if (ret < 0) {
 590         errno = socket_error();
 591     }
 592     return ret;
 593 }
 594
 595
 596 #undef bind
 597 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
 598                    socklen_t addrlen)
 599 {
 600     int ret;
 601     ret = bind(sockfd, addr, addrlen);
 602     if (ret < 0) {
 603         errno = socket_error();
 604     }
 605     return ret;
 606 }
 607
 608
 609 #undef socket
 610 int qemu_socket_wrap(int domain, int type, int protocol)
 611 {
 612     int ret;
 613     ret = socket(domain, type, protocol);
 614     if (ret < 0) {
 615         errno = socket_error();
 616     }
 617     return ret;
 618 }
 619
 620
 621 #undef accept
 622 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
 623                      socklen_t *addrlen)
 624 {
 625     int ret;
 626     ret = accept(sockfd, addr, addrlen);
 627     if (ret < 0) {
 628         errno = socket_error();
 629     }
 630     return ret;
 631 }
 632
 633
 634 #undef shutdown
 635 int qemu_shutdown_wrap(int sockfd, int how)
 636 {
 637     int ret;
 638     ret = shutdown(sockfd, how);
 639     if (ret < 0) {
 640         errno = socket_error();
 641     }
 642     return ret;
 643 }
 644
 645
 646 #undef ioctlsocket
 647 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
 648 {
 649     int ret;
 650     ret = ioctlsocket(fd, req, val);
 651     if (ret < 0) {
 652         errno = socket_error();
 653     }
 654     return ret;
 655 }
 656
 657
 658 #undef closesocket
 659 int qemu_closesocket_wrap(int fd)
 660 {
 661     int ret;
 662     ret = closesocket(fd);
 663     if (ret < 0) {
 664         errno = socket_error();
 665     }
 666     return ret;
 667 }
 668
 669
 670 #undef getsockopt
 671 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
 672                          void *optval, socklen_t *optlen)
 673 {
 674     int ret;
 675     ret = getsockopt(sockfd, level, optname, optval, optlen);
 676     if (ret < 0) {
 677         errno = socket_error();
 678     }
 679     return ret;
 680 }
 681
 682
 683 #undef setsockopt
 684 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
 685                          const void *optval, socklen_t optlen)
 686 {
 687     int ret;
 688     ret = setsockopt(sockfd, level, optname, optval, optlen);
 689     if (ret < 0) {
 690         errno = socket_error();
 691     }
 692     return ret;
 693 }
 694
 695
 696 #undef getpeername
 697 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
 698                           socklen_t *addrlen)
 699 {
 700     int ret;
 701     ret = getpeername(sockfd, addr, addrlen);
 702     if (ret < 0) {
 703         errno = socket_error();
 704     }
 705     return ret;
 706 }
 707
 708
 709 #undef getsockname
 710 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
 711                           socklen_t *addrlen)
 712 {
 713     int ret;
 714     ret = getsockname(sockfd, addr, addrlen);
 715     if (ret < 0) {
 716         errno = socket_error();
 717     }
 718     return ret;
 719 }
 720
 721
 722 #undef send
 723 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
 724 {
 725     int ret;
 726     ret = send(sockfd, buf, len, flags);
 727     if (ret < 0) {
 728         errno = socket_error();
 729     }
 730     return ret;
 731 }
 732
 733
 734 #undef sendto
 735 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
 736                          const struct sockaddr *addr, socklen_t addrlen)
 737 {
 738     int ret;
 739     ret = sendto(sockfd, buf, len, flags, addr, addrlen);
 740     if (ret < 0) {
 741         errno = socket_error();
 742     }
 743     return ret;
 744 }
 745
 746
 747 #undef recv
 748 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
 749 {
 750     int ret;
 751     ret = recv(sockfd, buf, len, flags);
 752     if (ret < 0) {
 753         errno = socket_error();
 754     }
 755     return ret;
 756 }
 757
 758
 759 #undef recvfrom
 760 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
 761                            struct sockaddr *addr, socklen_t *addrlen)
 762 {
 763     int ret;
 764     ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
 765     if (ret < 0) {
 766         errno = socket_error();
 767     }
 768     return ret;
 769 }