lib/lws-plat-win.c

   1 #ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
   2 #define _WINSOCK_DEPRECATED_NO_WARNINGS
   3 #endif
   4 #include "private-libwebsockets.h"
   5
   6 unsigned long long
   7 time_in_microseconds()
   8 {
   9 #define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
  10         FILETIME filetime;
  11         ULARGE_INTEGER datetime;
  12
  13 #ifdef _WIN32_WCE
  14         GetCurrentFT(&filetime);
  15 #else
  16         GetSystemTimeAsFileTime(&filetime);
  17 #endif
  18
  19         /*
  20          * As per Windows documentation for FILETIME, copy the resulting FILETIME structure to a
  21          * ULARGE_INTEGER structure using memcpy (using memcpy instead of direct assignment can
  22          * prevent alignment faults on 64-bit Windows).
  23          */
  24         memcpy(&datetime, &filetime, sizeof(datetime));
  25
  26         /* Windows file times are in 100s of nanoseconds. */
  27         return (datetime.QuadPart - DELTA_EPOCH_IN_MICROSECS) / 10;
  28 }
  29
  30 #ifdef _WIN32_WCE
  31 time_t time(time_t *t)
  32 {
  33         time_t ret = time_in_microseconds() / 1000000;
  34         *t = ret;
  35         return ret;
  36 }
  37 #endif
  38
  39 /* file descriptor hash management */
  40
  41 struct lws *
  42 wsi_from_fd(const struct lws_context *context, lws_sockfd_type fd)
  43 {
  44         int h = LWS_FD_HASH(fd);
  45         int n = 0;
  46
  47         for (n = 0; n < context->fd_hashtable[h].length; n++)
  48                 if (context->fd_hashtable[h].wsi[n]->sock == fd)
  49                         return context->fd_hashtable[h].wsi[n];
  50
  51         return NULL;
  52 }
  53
  54 int
  55 insert_wsi(struct lws_context *context, struct lws *wsi)
  56 {
  57         int h = LWS_FD_HASH(wsi->sock);
  58
  59         if (context->fd_hashtable[h].length == (getdtablesize() - 1)) {
  60                 lwsl_err("hash table overflow\n");
  61                 return 1;
  62         }
  63
  64         context->fd_hashtable[h].wsi[context->fd_hashtable[h].length++] = wsi;
  65
  66         return 0;
  67 }
  68
  69 int
  70 delete_from_fd(struct lws_context *context, lws_sockfd_type fd)
  71 {
  72         int h = LWS_FD_HASH(fd);
  73         int n = 0;
  74
  75         for (n = 0; n < context->fd_hashtable[h].length; n++)
  76                 if (context->fd_hashtable[h].wsi[n]->sock == fd) {
  77                         while (n < context->fd_hashtable[h].length) {
  78                                 context->fd_hashtable[h].wsi[n] =
  79                                             context->fd_hashtable[h].wsi[n + 1];
  80                                 n++;
  81                         }
  82                         context->fd_hashtable[h].length--;
  83
  84                         return 0;
  85                 }
  86
  87         lwsl_err("Failed to find fd %d requested for "
  88                  "delete in hashtable\n", fd);
  89         return 1;
  90 }
  91
  92 LWS_VISIBLE int lws_get_random(struct lws_context *context,
  93                                                              void *buf, int len)
  94 {
  95         int n;
  96         char *p = (char *)buf;
  97
  98         for (n = 0; n < len; n++)
  99                 p[n] = (unsigned char)rand();
 100
 101         return n;
 102 }
 103
 104 LWS_VISIBLE int lws_send_pipe_choked(struct lws *wsi)
 105 {
 106         return (int)wsi->sock_send_blocking;
 107 }
 108
 109 LWS_VISIBLE int lws_poll_listen_fd(struct lws_pollfd *fd)
 110 {
 111         fd_set readfds;
 112         struct timeval tv = { 0, 0 };
 113
 114         assert((fd->events & LWS_POLLIN) == LWS_POLLIN);
 115
 116         FD_ZERO(&readfds);
 117         FD_SET(fd->fd, &readfds);
 118
 119         return select(fd->fd + 1, &readfds, NULL, NULL, &tv);
 120 }
 121
 122 /**
 123  * lws_cancel_service() - Cancel servicing of pending websocket activity
 124  * @context:    Websocket context
 125  *
 126  *      This function let a call to lws_service() waiting for a timeout
 127  *      immediately return.
 128  */
 129 LWS_VISIBLE void
 130 lws_cancel_service(struct lws_context *context)
 131 {
 132         struct lws_context_per_thread *pt = &context->pt[0];
 133         int n = context->count_threads;
 134
 135         while (n--) {
 136                 WSASetEvent(pt->events[0]);
 137                 pt++;
 138         }
 139 }
 140
 141 LWS_VISIBLE void
 142 lws_cancel_service_pt(struct lws *wsi)
 143 {
 144         struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
 145         WSASetEvent(pt->events[0]);
 146 }
 147
 148 LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
 149 {
 150         lwsl_emit_stderr(level, line);
 151 }
 152
 153 LWS_VISIBLE int
 154 lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
 155 {
 156         struct lws_context_per_thread *pt = &context->pt[tsi];
 157         WSANETWORKEVENTS networkevents;
 158         struct lws_pollfd *pfd;
 159         struct lws *wsi;
 160         unsigned int i;
 161         DWORD ev;
 162         int n, m;
 163
 164         /* stay dead once we are dead */
 165         if (context == NULL)
 166                 return 1;
 167
 168         if (!context->service_tid_detected) {
 169                 struct lws _lws;
 170
 171                 memset(&_lws, 0, sizeof(_lws));
 172                 _lws.context = context;
 173
 174                 context->service_tid_detected = context->protocols[0].callback(
 175                         &_lws, LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
 176         }
 177         context->service_tid = context->service_tid_detected;
 178
 179         for (i = 0; i < pt->fds_count; ++i) {
 180                 pfd = &pt->fds[i];
 181                 if (pfd->fd == pt->lserv_fd)
 182                         continue;
 183
 184                 if (pfd->events & LWS_POLLOUT) {
 185                         wsi = wsi_from_fd(context, pfd->fd);
 186                         if (!wsi || wsi->sock_send_blocking)
 187                                 continue;
 188                         pfd->revents = LWS_POLLOUT;
 189                         n = lws_service_fd(context, pfd);
 190                         if (n < 0)
 191                                 return -1;
 192                         /* if something closed, retry this slot */
 193                         if (n)
 194                                 i--;
 195                 }
 196         }
 197
 198         /* if we know something needs service already, don't wait in poll */
 199         timeout_ms = lws_service_adjust_timeout(context, timeout_ms, tsi);
 200
 201         ev = WSAWaitForMultipleEvents(pt->fds_count + 1, pt->events,
 202                                       FALSE, timeout_ms, FALSE);
 203         context->service_tid = 0;
 204
 205         if (ev == WSA_WAIT_TIMEOUT) {
 206                 lws_service_fd(context, NULL);
 207                 return 0;
 208         }
 209
 210         if (ev == WSA_WAIT_EVENT_0) {
 211                 WSAResetEvent(pt->events[0]);
 212                 return 0;
 213         }
 214
 215         if (ev < WSA_WAIT_EVENT_0 || ev > WSA_WAIT_EVENT_0 + pt->fds_count)
 216                 return -1;
 217
 218         pfd = &pt->fds[ev - WSA_WAIT_EVENT_0 - 1];
 219
 220         /* eh... is one event at a time the best windows can do? */
 221
 222         if (WSAEnumNetworkEvents(pfd->fd, pt->events[ev - WSA_WAIT_EVENT_0],
 223                                  &networkevents) == SOCKET_ERROR) {
 224                 lwsl_err("WSAEnumNetworkEvents() failed with error %d\n",
 225                                                                      LWS_ERRNO);
 226                 return -1;
 227         }
 228
 229         pfd->revents = (short)networkevents.lNetworkEvents;
 230
 231         if (pfd->revents & LWS_POLLOUT) {
 232                 wsi = wsi_from_fd(context, pfd->fd);
 233                 if (wsi)
 234                         wsi->sock_send_blocking = 0;
 235         }
 236
 237         /* if someone faked their LWS_POLLIN, then go through all active fds */
 238
 239         if (lws_service_flag_pending(context, tsi)) {
 240                 /* any socket with events to service? */
 241                 for (n = 0; n < (int)pt->fds_count; n++) {
 242                         if (!pt->fds[n].revents)
 243                                 continue;
 244
 245                         m = lws_service_fd_tsi(context, &pt->fds[n], tsi);
 246                         if (m < 0)
 247                                 return -1;
 248                         /* if something closed, retry this slot */
 249                         if (m)
 250                                 n--;
 251                 }
 252                 return 0;
 253         }
 254
 255         /* otherwise just do the one... must be a way to improve that... */
 256
 257         return lws_service_fd_tsi(context, pfd, tsi);
 258 }
 259
 260 LWS_VISIBLE int
 261 lws_plat_service(struct lws_context *context, int timeout_ms)
 262 {
 263         return lws_plat_service_tsi(context, timeout_ms, 0);
 264 }
 265
 266 LWS_VISIBLE int
 267 lws_plat_set_socket_options(struct lws_context *context, lws_sockfd_type fd)
 268 {
 269         int optval = 1;
 270         int optlen = sizeof(optval);
 271         u_long optl = 1;
 272         DWORD dwBytesRet;
 273         struct tcp_keepalive alive;
 274         int protonbr;
 275 #ifndef _WIN32_WCE
 276         struct protoent *tcp_proto;
 277 #endif
 278
 279         if (context->ka_time) {
 280                 /* enable keepalive on this socket */
 281                 optval = 1;
 282                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
 283                                              (const char *)&optval, optlen) < 0)
 284                         return 1;
 285
 286                 alive.onoff = TRUE;
 287                 alive.keepalivetime = context->ka_time;
 288                 alive.keepaliveinterval = context->ka_interval;
 289
 290                 if (WSAIoctl(fd, SIO_KEEPALIVE_VALS, &alive, sizeof(alive),
 291                                               NULL, 0, &dwBytesRet, NULL, NULL))
 292                         return 1;
 293         }
 294
 295         /* Disable Nagle */
 296         optval = 1;
 297 #ifndef _WIN32_WCE
 298         tcp_proto = getprotobyname("TCP");
 299         if (!tcp_proto) {
 300                 lwsl_err("getprotobyname() failed with error %d\n", LWS_ERRNO);
 301                 return 1;
 302         }
 303         protonbr = tcp_proto->p_proto;
 304 #else
 305         protonbr = 6;
 306 #endif
 307
 308         setsockopt(fd, protonbr, TCP_NODELAY, (const char *)&optval, optlen);
 309
 310         /* We are nonblocking... */
 311         ioctlsocket(fd, FIONBIO, &optl);
 312
 313         return 0;
 314 }
 315
 316 LWS_VISIBLE void
 317 lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
 318 {
 319 }
 320
 321 LWS_VISIBLE int
 322 lws_plat_context_early_init(void)
 323 {
 324         WORD wVersionRequested;
 325         WSADATA wsaData;
 326         int err;
 327
 328         /* Use the MAKEWORD(lowbyte, highbyte) macro from Windef.h */
 329         wVersionRequested = MAKEWORD(2, 2);
 330
 331         err = WSAStartup(wVersionRequested, &wsaData);
 332         if (!err)
 333                 return 0;
 334         /*
 335          * Tell the user that we could not find a usable
 336          * Winsock DLL
 337          */
 338         lwsl_err("WSAStartup failed with error: %d\n", err);
 339
 340         return 1;
 341 }
 342
 343 LWS_VISIBLE void
 344 lws_plat_context_early_destroy(struct lws_context *context)
 345 {
 346         struct lws_context_per_thread *pt = &context->pt[0];
 347         int n = context->count_threads;
 348
 349         while (n--) {
 350                 if (pt->events) {
 351                         WSACloseEvent(pt->events[0]);
 352                         lws_free(pt->events);
 353                 }
 354                 pt++;
 355         }
 356 }
 357
 358 LWS_VISIBLE void
 359 lws_plat_context_late_destroy(struct lws_context *context)
 360 {
 361         int n;
 362
 363         for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
 364                 if (context->fd_hashtable[n].wsi)
 365                         lws_free(context->fd_hashtable[n].wsi);
 366         }
 367
 368         WSACleanup();
 369 }
 370
 371 LWS_VISIBLE LWS_EXTERN int
 372 lws_interface_to_sa(int ipv6,
 373                 const char *ifname, struct sockaddr_in *addr, size_t addrlen)
 374 {
 375         long long address = inet_addr(ifname);
 376
 377         if (address == INADDR_NONE) {
 378                 struct hostent *entry = gethostbyname(ifname);
 379                 if (entry)
 380                         address = ((struct in_addr *)entry->h_addr_list[0])->s_addr;
 381         }
 382
 383         if (address == INADDR_NONE)
 384                 return -1;
 385
 386         addr->sin_addr.s_addr = (unsigned long)address;
 387
 388         return 0;
 389 }
 390
 391 LWS_VISIBLE void
 392 lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi)
 393 {
 394         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 395
 396         pt->fds[pt->fds_count++].revents = 0;
 397         pt->events[pt->fds_count] = WSACreateEvent();
 398         WSAEventSelect(wsi->sock, pt->events[pt->fds_count],
 399                        LWS_POLLIN | LWS_POLLHUP);
 400 }
 401
 402 LWS_VISIBLE void
 403 lws_plat_delete_socket_from_fds(struct lws_context *context,
 404                                                 struct lws *wsi, int m)
 405 {
 406         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 407
 408         WSACloseEvent(pt->events[m + 1]);
 409         pt->events[m + 1] = pt->events[pt->fds_count--];
 410 }
 411
 412 LWS_VISIBLE void
 413 lws_plat_service_periodic(struct lws_context *context)
 414 {
 415 }
 416
 417 LWS_VISIBLE int
 418 lws_plat_change_pollfd(struct lws_context *context,
 419                       struct lws *wsi, struct lws_pollfd *pfd)
 420 {
 421         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 422         long networkevents = LWS_POLLHUP;
 423
 424         if ((pfd->events & LWS_POLLIN))
 425                 networkevents |= LWS_POLLIN;
 426
 427         if ((pfd->events & LWS_POLLOUT))
 428                 networkevents |= LWS_POLLOUT;
 429
 430         if (WSAEventSelect(wsi->sock,
 431                         pt->events[wsi->position_in_fds_table + 1],
 432                                                networkevents) != SOCKET_ERROR)
 433                 return 0;
 434
 435         lwsl_err("WSAEventSelect() failed with error %d\n", LWS_ERRNO);
 436
 437         return 1;
 438 }
 439
 440 LWS_VISIBLE const char *
 441 lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
 442 {
 443         WCHAR *buffer;
 444         DWORD bufferlen = cnt;
 445         BOOL ok = FALSE;
 446
 447         buffer = lws_malloc(bufferlen);
 448         if (!buffer) {
 449                 lwsl_err("Out of memory\n");
 450                 return NULL;
 451         }
 452
 453         if (af == AF_INET) {
 454                 struct sockaddr_in srcaddr;
 455                 bzero(&srcaddr, sizeof(srcaddr));
 456                 srcaddr.sin_family = AF_INET;
 457                 memcpy(&(srcaddr.sin_addr), src, sizeof(srcaddr.sin_addr));
 458
 459                 if (!WSAAddressToStringW((struct sockaddr*)&srcaddr, sizeof(srcaddr), 0, buffer, &bufferlen))
 460                         ok = TRUE;
 461 #ifdef LWS_USE_IPV6
 462         } else if (af == AF_INET6) {
 463                 struct sockaddr_in6 srcaddr;
 464                 bzero(&srcaddr, sizeof(srcaddr));
 465                 srcaddr.sin6_family = AF_INET6;
 466                 memcpy(&(srcaddr.sin6_addr), src, sizeof(srcaddr.sin6_addr));
 467
 468                 if (!WSAAddressToStringW((struct sockaddr*)&srcaddr, sizeof(srcaddr), 0, buffer, &bufferlen))
 469                         ok = TRUE;
 470 #endif
 471         } else
 472                 lwsl_err("Unsupported type\n");
 473
 474         if (!ok) {
 475                 int rv = WSAGetLastError();
 476                 lwsl_err("WSAAddressToString() : %d\n", rv);
 477         } else {
 478                 if (WideCharToMultiByte(CP_ACP, 0, buffer, bufferlen, dst, cnt, 0, NULL) <= 0)
 479                         ok = FALSE;
 480         }
 481
 482         lws_free(buffer);
 483         return ok ? dst : NULL;
 484 }
 485
 486 static lws_filefd_type
 487 _lws_plat_file_open(struct lws *wsi, const char *filename,
 488                     unsigned long *filelen, int flags)
 489 {
 490         HANDLE ret;
 491         WCHAR buf[MAX_PATH];
 492
 493         (void)wsi;
 494         MultiByteToWideChar(CP_UTF8, 0, filename, -1, buf, ARRAY_SIZE(buf));
 495         if ((flags & 7) == _O_RDONLY) {
 496                 ret = CreateFileW(buf, GENERIC_READ, FILE_SHARE_READ,
 497                           NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 498         } else {
 499                 lwsl_err("%s: open for write not implemented\n", __func__);
 500                 *filelen = 0;
 501                 return LWS_INVALID_FILE;
 502         }
 503
 504         if (ret != LWS_INVALID_FILE)
 505                 *filelen = GetFileSize(ret, NULL);
 506
 507         return ret;
 508 }
 509
 510 static int
 511 _lws_plat_file_close(struct lws *wsi, lws_filefd_type fd)
 512 {
 513         (void)wsi;
 514
 515         CloseHandle((HANDLE)fd);
 516
 517         return 0;
 518 }
 519
 520 static unsigned long
 521 _lws_plat_file_seek_cur(struct lws *wsi, lws_filefd_type fd, long offset)
 522 {
 523         (void)wsi;
 524
 525         return SetFilePointer((HANDLE)fd, offset, NULL, FILE_CURRENT);
 526 }
 527
 528 static int
 529 _lws_plat_file_read(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 530                     unsigned char* buf, unsigned long len)
 531 {
 532         DWORD _amount;
 533
 534         (void *)wsi;
 535         if (!ReadFile((HANDLE)fd, buf, (DWORD)len, &_amount, NULL)) {
 536                 *amount = 0;
 537
 538                 return 1;
 539         }
 540
 541         *amount = (unsigned long)_amount;
 542
 543         return 0;
 544 }
 545
 546 static int
 547 _lws_plat_file_write(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 548                      unsigned char* buf, unsigned long len)
 549 {
 550         (void)wsi;
 551         (void)fd;
 552         (void)amount;
 553         (void)buf;
 554         (void)len;
 555
 556         lwsl_err("%s: not implemented yet on this platform\n", __func__);
 557
 558         return -1;
 559 }
 560
 561 LWS_VISIBLE int
 562 lws_plat_init(struct lws_context *context,
 563               struct lws_context_creation_info *info)
 564 {
 565         struct lws_context_per_thread *pt = &context->pt[0];
 566         int i, n = context->count_threads;
 567
 568         for (i = 0; i < FD_HASHTABLE_MODULUS; i++) {
 569                 context->fd_hashtable[i].wsi =
 570                         lws_zalloc(sizeof(struct lws*) * context->max_fds);
 571
 572                 if (!context->fd_hashtable[i].wsi)
 573                         return -1;
 574         }
 575
 576         while (n--) {
 577                 pt->events = lws_malloc(sizeof(WSAEVENT) *
 578                                         (context->fd_limit_per_thread + 1));
 579                 if (pt->events == NULL) {
 580                         lwsl_err("Unable to allocate events array for %d connections\n",
 581                                         context->fd_limit_per_thread + 1);
 582                         return 1;
 583                 }
 584
 585                 pt->fds_count = 0;
 586                 pt->events[0] = WSACreateEvent();
 587
 588                 pt++;
 589         }
 590
 591         context->fd_random = 0;
 592
 593         context->fops.open      = _lws_plat_file_open;
 594         context->fops.close     = _lws_plat_file_close;
 595         context->fops.seek_cur  = _lws_plat_file_seek_cur;
 596         context->fops.read      = _lws_plat_file_read;
 597         context->fops.write     = _lws_plat_file_write;
 598
 599         return 0;
 600 }