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->vhost_list->
 175                         protocols[0].callback(&_lws, LWS_CALLBACK_GET_THREAD_ID,
 176                                               NULL, NULL, 0);
 177         }
 178         context->service_tid = context->service_tid_detected;
 179
 180         if (timeout_ms < 0)
 181                 goto faked_service;
 182
 183         for (i = 0; i < pt->fds_count; ++i) {
 184                 pfd = &pt->fds[i];
 185
 186                 if (!(pfd->events & LWS_POLLOUT))
 187                         continue;
 188
 189                 wsi = wsi_from_fd(context, pfd->fd);
 190                 if (wsi->listener)
 191                         continue;
 192                 if (!wsi || wsi->sock_send_blocking)
 193                         continue;
 194                 pfd->revents = LWS_POLLOUT;
 195                 n = lws_service_fd(context, pfd);
 196                 if (n < 0)
 197                         return -1;
 198                 /* if something closed, retry this slot */
 199                 if (n)
 200                         i--;
 201         }
 202
 203         /* if we know something needs service already, don't wait in poll */
 204         timeout_ms = lws_service_adjust_timeout(context, timeout_ms, tsi);
 205
 206         ev = WSAWaitForMultipleEvents(pt->fds_count + 1, pt->events,
 207                                       FALSE, timeout_ms, FALSE);
 208         context->service_tid = 0;
 209
 210         if (ev == WSA_WAIT_TIMEOUT) {
 211                 lws_service_fd(context, NULL);
 212                 return 0;
 213         }
 214
 215         if (ev == WSA_WAIT_EVENT_0) {
 216                 WSAResetEvent(pt->events[0]);
 217                 return 0;
 218         }
 219
 220         if (ev < WSA_WAIT_EVENT_0 || ev > WSA_WAIT_EVENT_0 + pt->fds_count)
 221                 return -1;
 222
 223         pfd = &pt->fds[ev - WSA_WAIT_EVENT_0 - 1];
 224
 225         /* eh... is one event at a time the best windows can do? */
 226
 227         if (WSAEnumNetworkEvents(pfd->fd, pt->events[ev - WSA_WAIT_EVENT_0],
 228                                  &networkevents) == SOCKET_ERROR) {
 229                 lwsl_err("WSAEnumNetworkEvents() failed with error %d\n",
 230                                                                      LWS_ERRNO);
 231                 return -1;
 232         }
 233
 234         pfd->revents = (short)networkevents.lNetworkEvents;
 235
 236         if (pfd->revents & LWS_POLLOUT) {
 237                 wsi = wsi_from_fd(context, pfd->fd);
 238                 if (wsi)
 239                         wsi->sock_send_blocking = 0;
 240         }
 241
 242 faked_service:
 243
 244         /* if someone faked their LWS_POLLIN, then go through all active fds */
 245
 246         if (lws_service_flag_pending(context, tsi)) {
 247                 /* any socket with events to service? */
 248                 for (n = 0; n < (int)pt->fds_count; n++) {
 249                         if (!pt->fds[n].revents)
 250                                 continue;
 251
 252                         m = lws_service_fd_tsi(context, &pt->fds[n], tsi);
 253                         if (m < 0)
 254                                 return -1;
 255                         /* if something closed, retry this slot */
 256                         if (m)
 257                                 n--;
 258                 }
 259                 return 0;
 260         }
 261
 262         if (timeout_ms < 0)
 263                 return 0;
 264
 265         /* otherwise just do the one... must be a way to improve that... */
 266
 267         return lws_service_fd_tsi(context, pfd, tsi);
 268 }
 269
 270 LWS_VISIBLE int
 271 lws_plat_service(struct lws_context *context, int timeout_ms)
 272 {
 273         return lws_plat_service_tsi(context, timeout_ms, 0);
 274 }
 275
 276 LWS_VISIBLE int
 277 lws_plat_set_socket_options(struct lws_vhost *vhost, lws_sockfd_type fd)
 278 {
 279         int optval = 1;
 280         int optlen = sizeof(optval);
 281         u_long optl = 1;
 282         DWORD dwBytesRet;
 283         struct tcp_keepalive alive;
 284         int protonbr;
 285 #ifndef _WIN32_WCE
 286         struct protoent *tcp_proto;
 287 #endif
 288
 289         if (vhost->ka_time) {
 290                 /* enable keepalive on this socket */
 291                 optval = 1;
 292                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
 293                                              (const char *)&optval, optlen) < 0)
 294                         return 1;
 295
 296                 alive.onoff = TRUE;
 297                 alive.keepalivetime = vhost->ka_time;
 298                 alive.keepaliveinterval = vhost->ka_interval;
 299
 300                 if (WSAIoctl(fd, SIO_KEEPALIVE_VALS, &alive, sizeof(alive),
 301                                               NULL, 0, &dwBytesRet, NULL, NULL))
 302                         return 1;
 303         }
 304
 305         /* Disable Nagle */
 306         optval = 1;
 307 #ifndef _WIN32_WCE
 308         tcp_proto = getprotobyname("TCP");
 309         if (!tcp_proto) {
 310                 lwsl_err("getprotobyname() failed with error %d\n", LWS_ERRNO);
 311                 return 1;
 312         }
 313         protonbr = tcp_proto->p_proto;
 314 #else
 315         protonbr = 6;
 316 #endif
 317
 318         setsockopt(fd, protonbr, TCP_NODELAY, (const char *)&optval, optlen);
 319
 320         /* We are nonblocking... */
 321         ioctlsocket(fd, FIONBIO, &optl);
 322
 323         return 0;
 324 }
 325
 326 LWS_VISIBLE void
 327 lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
 328 {
 329 }
 330
 331 LWS_VISIBLE int
 332 lws_plat_context_early_init(void)
 333 {
 334         WORD wVersionRequested;
 335         WSADATA wsaData;
 336         int err;
 337
 338         /* Use the MAKEWORD(lowbyte, highbyte) macro from Windef.h */
 339         wVersionRequested = MAKEWORD(2, 2);
 340
 341         err = WSAStartup(wVersionRequested, &wsaData);
 342         if (!err)
 343                 return 0;
 344         /*
 345          * Tell the user that we could not find a usable
 346          * Winsock DLL
 347          */
 348         lwsl_err("WSAStartup failed with error: %d\n", err);
 349
 350         return 1;
 351 }
 352
 353 LWS_VISIBLE void
 354 lws_plat_context_early_destroy(struct lws_context *context)
 355 {
 356         struct lws_context_per_thread *pt = &context->pt[0];
 357         int n = context->count_threads;
 358
 359         while (n--) {
 360                 if (pt->events) {
 361                         WSACloseEvent(pt->events[0]);
 362                         lws_free(pt->events);
 363                 }
 364                 pt++;
 365         }
 366 }
 367
 368 LWS_VISIBLE void
 369 lws_plat_context_late_destroy(struct lws_context *context)
 370 {
 371         int n;
 372
 373         for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
 374                 if (context->fd_hashtable[n].wsi)
 375                         lws_free(context->fd_hashtable[n].wsi);
 376         }
 377
 378         WSACleanup();
 379 }
 380
 381 LWS_VISIBLE LWS_EXTERN int
 382 lws_interface_to_sa(int ipv6,
 383                 const char *ifname, struct sockaddr_in *addr, size_t addrlen)
 384 {
 385         long long address = inet_addr(ifname);
 386
 387         if (address == INADDR_NONE) {
 388                 struct hostent *entry = gethostbyname(ifname);
 389                 if (entry)
 390                         address = ((struct in_addr *)entry->h_addr_list[0])->s_addr;
 391         }
 392
 393         if (address == INADDR_NONE)
 394                 return -1;
 395
 396         addr->sin_addr.s_addr = (unsigned long)address;
 397
 398         return 0;
 399 }
 400
 401 LWS_VISIBLE void
 402 lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi)
 403 {
 404         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 405
 406         pt->fds[pt->fds_count++].revents = 0;
 407         pt->events[pt->fds_count] = WSACreateEvent();
 408         WSAEventSelect(wsi->sock, pt->events[pt->fds_count],
 409                        LWS_POLLIN | LWS_POLLHUP);
 410 }
 411
 412 LWS_VISIBLE void
 413 lws_plat_delete_socket_from_fds(struct lws_context *context,
 414                                                 struct lws *wsi, int m)
 415 {
 416         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 417
 418         WSACloseEvent(pt->events[m + 1]);
 419         pt->events[m + 1] = pt->events[pt->fds_count--];
 420 }
 421
 422 LWS_VISIBLE void
 423 lws_plat_service_periodic(struct lws_context *context)
 424 {
 425 }
 426
 427 LWS_VISIBLE int
 428 lws_plat_change_pollfd(struct lws_context *context,
 429                       struct lws *wsi, struct lws_pollfd *pfd)
 430 {
 431         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 432         long networkevents = LWS_POLLHUP;
 433
 434         if ((pfd->events & LWS_POLLIN))
 435                 networkevents |= LWS_POLLIN;
 436
 437         if ((pfd->events & LWS_POLLOUT))
 438                 networkevents |= LWS_POLLOUT;
 439
 440         if (WSAEventSelect(wsi->sock,
 441                         pt->events[wsi->position_in_fds_table + 1],
 442                                                networkevents) != SOCKET_ERROR)
 443                 return 0;
 444
 445         lwsl_err("WSAEventSelect() failed with error %d\n", LWS_ERRNO);
 446
 447         return 1;
 448 }
 449
 450 LWS_VISIBLE const char *
 451 lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
 452 {
 453         WCHAR *buffer;
 454         DWORD bufferlen = cnt;
 455         BOOL ok = FALSE;
 456
 457         buffer = lws_malloc(bufferlen);
 458         if (!buffer) {
 459                 lwsl_err("Out of memory\n");
 460                 return NULL;
 461         }
 462
 463         if (af == AF_INET) {
 464                 struct sockaddr_in srcaddr;
 465                 bzero(&srcaddr, sizeof(srcaddr));
 466                 srcaddr.sin_family = AF_INET;
 467                 memcpy(&(srcaddr.sin_addr), src, sizeof(srcaddr.sin_addr));
 468
 469                 if (!WSAAddressToStringW((struct sockaddr*)&srcaddr, sizeof(srcaddr), 0, buffer, &bufferlen))
 470                         ok = TRUE;
 471 #ifdef LWS_USE_IPV6
 472         } else if (af == AF_INET6) {
 473                 struct sockaddr_in6 srcaddr;
 474                 bzero(&srcaddr, sizeof(srcaddr));
 475                 srcaddr.sin6_family = AF_INET6;
 476                 memcpy(&(srcaddr.sin6_addr), src, sizeof(srcaddr.sin6_addr));
 477
 478                 if (!WSAAddressToStringW((struct sockaddr*)&srcaddr, sizeof(srcaddr), 0, buffer, &bufferlen))
 479                         ok = TRUE;
 480 #endif
 481         } else
 482                 lwsl_err("Unsupported type\n");
 483
 484         if (!ok) {
 485                 int rv = WSAGetLastError();
 486                 lwsl_err("WSAAddressToString() : %d\n", rv);
 487         } else {
 488                 if (WideCharToMultiByte(CP_ACP, 0, buffer, bufferlen, dst, cnt, 0, NULL) <= 0)
 489                         ok = FALSE;
 490         }
 491
 492         lws_free(buffer);
 493         return ok ? dst : NULL;
 494 }
 495
 496 static lws_filefd_type
 497 _lws_plat_file_open(struct lws *wsi, const char *filename,
 498                     unsigned long *filelen, int flags)
 499 {
 500         HANDLE ret;
 501         WCHAR buf[MAX_PATH];
 502
 503         (void)wsi;
 504         MultiByteToWideChar(CP_UTF8, 0, filename, -1, buf, ARRAY_SIZE(buf));
 505         if ((flags & 7) == _O_RDONLY) {
 506                 ret = CreateFileW(buf, GENERIC_READ, FILE_SHARE_READ,
 507                           NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 508         } else {
 509                 lwsl_err("%s: open for write not implemented\n", __func__);
 510                 *filelen = 0;
 511                 return LWS_INVALID_FILE;
 512         }
 513
 514         if (ret != LWS_INVALID_FILE)
 515                 *filelen = GetFileSize(ret, NULL);
 516
 517         return ret;
 518 }
 519
 520 static int
 521 _lws_plat_file_close(struct lws *wsi, lws_filefd_type fd)
 522 {
 523         (void)wsi;
 524
 525         CloseHandle((HANDLE)fd);
 526
 527         return 0;
 528 }
 529
 530 static unsigned long
 531 _lws_plat_file_seek_cur(struct lws *wsi, lws_filefd_type fd, long offset)
 532 {
 533         (void)wsi;
 534
 535         return SetFilePointer((HANDLE)fd, offset, NULL, FILE_CURRENT);
 536 }
 537
 538 static int
 539 _lws_plat_file_read(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 540                     unsigned char* buf, unsigned long len)
 541 {
 542         DWORD _amount;
 543
 544         if (!ReadFile((HANDLE)fd, buf, (DWORD)len, &_amount, NULL)) {
 545                 *amount = 0;
 546
 547                 return 1;
 548         }
 549
 550         *amount = (unsigned long)_amount;
 551
 552         return 0;
 553 }
 554
 555 static int
 556 _lws_plat_file_write(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 557                      unsigned char* buf, unsigned long len)
 558 {
 559         (void)wsi;
 560         (void)fd;
 561         (void)amount;
 562         (void)buf;
 563         (void)len;
 564
 565         lwsl_err("%s: not implemented yet on this platform\n", __func__);
 566
 567         return -1;
 568 }
 569
 570 LWS_VISIBLE int
 571 lws_plat_init(struct lws_context *context,
 572               struct lws_context_creation_info *info)
 573 {
 574         struct lws_context_per_thread *pt = &context->pt[0];
 575         int i, n = context->count_threads;
 576
 577         for (i = 0; i < FD_HASHTABLE_MODULUS; i++) {
 578                 context->fd_hashtable[i].wsi =
 579                         lws_zalloc(sizeof(struct lws*) * context->max_fds);
 580
 581                 if (!context->fd_hashtable[i].wsi)
 582                         return -1;
 583         }
 584
 585         while (n--) {
 586                 pt->events = lws_malloc(sizeof(WSAEVENT) *
 587                                         (context->fd_limit_per_thread + 1));
 588                 if (pt->events == NULL) {
 589                         lwsl_err("Unable to allocate events array for %d connections\n",
 590                                         context->fd_limit_per_thread + 1);
 591                         return 1;
 592                 }
 593
 594                 pt->fds_count = 0;
 595                 pt->events[0] = WSACreateEvent();
 596
 597                 pt++;
 598         }
 599
 600         context->fd_random = 0;
 601
 602         context->fops.open      = _lws_plat_file_open;
 603         context->fops.close     = _lws_plat_file_close;
 604         context->fops.seek_cur  = _lws_plat_file_seek_cur;
 605         context->fops.read      = _lws_plat_file_read;
 606         context->fops.write     = _lws_plat_file_write;
 607
 608         return 0;
 609 }