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);
 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         int n;
 157         unsigned int i;
 158         DWORD ev;
 159         WSANETWORKEVENTS networkevents;
 160         struct lws_pollfd *pfd;
 161         struct lws *wsi;
 162         struct lws_context_per_thread *pt = &context->pt[tsi];
 163
 164         /* stay dead once we are dead */
 165
 166         if (context == NULL)
 167                 return 1;
 168
 169         if (!context->service_tid_detected) {
 170                 struct lws _lws;
 171
 172                 memset(&_lws, 0, sizeof(_lws));
 173                 _lws.context = context;
 174
 175                 context->service_tid_detected = context->protocols[0].callback(
 176                         &_lws, LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
 177         }
 178         context->service_tid = context->service_tid_detected;
 179
 180         for (i = 0; i < pt->fds_count; ++i) {
 181                 pfd = &pt->fds[i];
 182                 if (pfd->fd == pt->lserv_fd)
 183                         continue;
 184
 185                 if (pfd->events & LWS_POLLOUT) {
 186                         wsi = wsi_from_fd(context, pfd->fd);
 187                         if (!wsi || wsi->sock_send_blocking)
 188                                 continue;
 189                         pfd->revents = LWS_POLLOUT;
 190                         n = lws_service_fd(context, pfd);
 191                         if (n < 0)
 192                                 return -1;
 193                         /* if something closed, retry this slot */
 194                         if (n)
 195                                 i--;
 196                 }
 197         }
 198
 199         ev = WSAWaitForMultipleEvents(pt->fds_count + 1, pt->events,
 200                                       FALSE, timeout_ms, FALSE);
 201         context->service_tid = 0;
 202
 203         if (ev == WSA_WAIT_TIMEOUT) {
 204                 lws_service_fd(context, NULL);
 205                 return 0;
 206         }
 207
 208         if (ev == WSA_WAIT_EVENT_0) {
 209                 WSAResetEvent(pt->events[0]);
 210                 return 0;
 211         }
 212
 213         if (ev < WSA_WAIT_EVENT_0 || ev > WSA_WAIT_EVENT_0 + pt->fds_count)
 214                 return -1;
 215
 216         pfd = &pt->fds[ev - WSA_WAIT_EVENT_0 - 1];
 217
 218         if (WSAEnumNetworkEvents(pfd->fd,
 219                                  pt->events[ev - WSA_WAIT_EVENT_0],
 220                                  &networkevents) == SOCKET_ERROR) {
 221                 lwsl_err("WSAEnumNetworkEvents() failed with error %d\n",
 222                                                                      LWS_ERRNO);
 223                 return -1;
 224         }
 225
 226         pfd->revents = (short)networkevents.lNetworkEvents;
 227
 228         if (pfd->revents & LWS_POLLOUT) {
 229                 wsi = wsi_from_fd(context, pfd->fd);
 230                 if (wsi)
 231                         wsi->sock_send_blocking = 0;
 232         }
 233
 234         return lws_service_fd(context, pfd);
 235 }
 236
 237 LWS_VISIBLE int
 238 lws_plat_service(struct lws_context *context, int timeout_ms)
 239 {
 240         return lws_plat_service_tsi(context, timeout_ms, 0);
 241 }
 242
 243 LWS_VISIBLE int
 244 lws_plat_set_socket_options(struct lws_context *context, lws_sockfd_type fd)
 245 {
 246         int optval = 1;
 247         int optlen = sizeof(optval);
 248         u_long optl = 1;
 249         DWORD dwBytesRet;
 250         struct tcp_keepalive alive;
 251         struct protoent *tcp_proto;
 252
 253         if (context->ka_time) {
 254                 /* enable keepalive on this socket */
 255                 optval = 1;
 256                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
 257                                              (const char *)&optval, optlen) < 0)
 258                         return 1;
 259
 260                 alive.onoff = TRUE;
 261                 alive.keepalivetime = context->ka_time;
 262                 alive.keepaliveinterval = context->ka_interval;
 263
 264                 if (WSAIoctl(fd, SIO_KEEPALIVE_VALS, &alive, sizeof(alive),
 265                                               NULL, 0, &dwBytesRet, NULL, NULL))
 266                         return 1;
 267         }
 268
 269         /* Disable Nagle */
 270         optval = 1;
 271         tcp_proto = getprotobyname("TCP");
 272         if (!tcp_proto) {
 273                 lwsl_err("getprotobyname() failed with error %d\n", LWS_ERRNO);
 274                 return 1;
 275         }
 276
 277         setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, (const char *)&optval, optlen);
 278
 279         /* We are nonblocking... */
 280         ioctlsocket(fd, FIONBIO, &optl);
 281
 282         return 0;
 283 }
 284
 285 LWS_VISIBLE void
 286 lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
 287 {
 288 }
 289
 290 LWS_VISIBLE int
 291 lws_plat_context_early_init(void)
 292 {
 293         WORD wVersionRequested;
 294         WSADATA wsaData;
 295         int err;
 296
 297         /* Use the MAKEWORD(lowbyte, highbyte) macro from Windef.h */
 298         wVersionRequested = MAKEWORD(2, 2);
 299
 300         err = WSAStartup(wVersionRequested, &wsaData);
 301         if (!err)
 302                 return 0;
 303         /*
 304          * Tell the user that we could not find a usable
 305          * Winsock DLL
 306          */
 307         lwsl_err("WSAStartup failed with error: %d\n", err);
 308
 309         return 1;
 310 }
 311
 312 LWS_VISIBLE void
 313 lws_plat_context_early_destroy(struct lws_context *context)
 314 {
 315         struct lws_context_per_thread *pt = &context->pt[0];
 316         int n = context->count_threads;
 317
 318         while (n--) {
 319                 if (pt->events) {
 320                         WSACloseEvent(pt->events[0]);
 321                         lws_free(pt->events);
 322                 }
 323                 pt++;
 324         }
 325 }
 326
 327 LWS_VISIBLE void
 328 lws_plat_context_late_destroy(struct lws_context *context)
 329 {
 330         int n;
 331
 332         for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
 333                 if (context->fd_hashtable[n].wsi)
 334                         lws_free(context->fd_hashtable[n].wsi);
 335         }
 336
 337         WSACleanup();
 338 }
 339
 340 LWS_VISIBLE LWS_EXTERN int
 341 lws_interface_to_sa(int ipv6,
 342                 const char *ifname, struct sockaddr_in *addr, size_t addrlen)
 343 {
 344         long long address = inet_addr(ifname);
 345
 346         if (address == INADDR_NONE) {
 347                 struct hostent *entry = gethostbyname(ifname);
 348                 if (entry)
 349                         address = ((struct in_addr *)entry->h_addr_list[0])->s_addr;
 350         }
 351
 352         if (address == INADDR_NONE)
 353                 return -1;
 354
 355         addr->sin_addr.s_addr = (unsigned long)address;
 356
 357         return 0;
 358 }
 359
 360 LWS_VISIBLE void
 361 lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi)
 362 {
 363         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 364
 365         pt->fds[pt->fds_count++].revents = 0;
 366         pt->events[pt->fds_count] = WSACreateEvent();
 367         WSAEventSelect(wsi->sock, pt->events[pt->fds_count], LWS_POLLIN);
 368 }
 369
 370 LWS_VISIBLE void
 371 lws_plat_delete_socket_from_fds(struct lws_context *context,
 372                                                 struct lws *wsi, int m)
 373 {
 374         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 375
 376         WSACloseEvent(pt->events[m + 1]);
 377         pt->events[m + 1] = pt->events[pt->fds_count--];
 378 }
 379
 380 LWS_VISIBLE void
 381 lws_plat_service_periodic(struct lws_context *context)
 382 {
 383 }
 384
 385 LWS_VISIBLE int
 386 lws_plat_change_pollfd(struct lws_context *context,
 387                       struct lws *wsi, struct lws_pollfd *pfd)
 388 {
 389         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 390         long networkevents = LWS_POLLHUP;
 391
 392         if ((pfd->events & LWS_POLLIN))
 393                 networkevents |= LWS_POLLIN;
 394
 395         if ((pfd->events & LWS_POLLOUT))
 396                 networkevents |= LWS_POLLOUT;
 397
 398         if (WSAEventSelect(wsi->sock,
 399                         pt->events[wsi->position_in_fds_table + 1],
 400                                                networkevents) != SOCKET_ERROR)
 401                 return 0;
 402
 403         lwsl_err("WSAEventSelect() failed with error %d\n", LWS_ERRNO);
 404
 405         return 1;
 406 }
 407
 408 LWS_VISIBLE const char *
 409 lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
 410 {
 411         WCHAR *buffer;
 412         DWORD bufferlen = cnt;
 413         BOOL ok = FALSE;
 414
 415         buffer = lws_malloc(bufferlen);
 416         if (!buffer) {
 417                 lwsl_err("Out of memory\n");
 418                 return NULL;
 419         }
 420
 421         if (af == AF_INET) {
 422                 struct sockaddr_in srcaddr;
 423                 bzero(&srcaddr, sizeof(srcaddr));
 424                 srcaddr.sin_family = AF_INET;
 425                 memcpy(&(srcaddr.sin_addr), src, sizeof(srcaddr.sin_addr));
 426
 427                 if (!WSAAddressToStringW((struct sockaddr*)&srcaddr, sizeof(srcaddr), 0, buffer, &bufferlen))
 428                         ok = TRUE;
 429 #ifdef LWS_USE_IPV6
 430         } else if (af == AF_INET6) {
 431                 struct sockaddr_in6 srcaddr;
 432                 bzero(&srcaddr, sizeof(srcaddr));
 433                 srcaddr.sin6_family = AF_INET6;
 434                 memcpy(&(srcaddr.sin6_addr), src, sizeof(srcaddr.sin6_addr));
 435
 436                 if (!WSAAddressToStringW((struct sockaddr*)&srcaddr, sizeof(srcaddr), 0, buffer, &bufferlen))
 437                         ok = TRUE;
 438 #endif
 439         } else
 440                 lwsl_err("Unsupported type\n");
 441
 442         if (!ok) {
 443                 int rv = WSAGetLastError();
 444                 lwsl_err("WSAAddressToString() : %d\n", rv);
 445         } else {
 446                 if (WideCharToMultiByte(CP_ACP, 0, buffer, bufferlen, dst, cnt, 0, NULL) <= 0)
 447                         ok = FALSE;
 448         }
 449
 450         lws_free(buffer);
 451         return ok ? dst : NULL;
 452 }
 453
 454 static lws_filefd_type
 455 _lws_plat_file_open(struct lws *wsi, const char *filename,
 456                     unsigned long *filelen, int flags)
 457 {
 458         HANDLE ret;
 459         WCHAR buf[MAX_PATH];
 460
 461         (void)wsi;
 462         MultiByteToWideChar(CP_UTF8, 0, filename, -1, buf, ARRAY_SIZE(buf));
 463         if ((flags & 7) == _O_RDONLY) {
 464                 ret = CreateFileW(buf, GENERIC_READ, FILE_SHARE_READ,
 465                           NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 466         } else {
 467                 lwsl_err("%s: open for write not implemented\n", __func__);
 468                 *filelen = 0;
 469                 return LWS_INVALID_FILE;
 470         }
 471
 472         if (ret != LWS_INVALID_FILE)
 473                 *filelen = GetFileSize(ret, NULL);
 474
 475         return ret;
 476 }
 477
 478 static int
 479 _lws_plat_file_close(struct lws *wsi, lws_filefd_type fd)
 480 {
 481         (void)wsi;
 482
 483         CloseHandle((HANDLE)fd);
 484
 485         return 0;
 486 }
 487
 488 static unsigned long
 489 _lws_plat_file_seek_cur(struct lws *wsi, lws_filefd_type fd, long offset)
 490 {
 491         (void)wsi;
 492
 493         return SetFilePointer((HANDLE)fd, offset, NULL, FILE_CURRENT);
 494 }
 495
 496 static int
 497 _lws_plat_file_read(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 498                     unsigned char* buf, unsigned long len)
 499 {
 500         DWORD _amount;
 501
 502         (void *)wsi;
 503         if (!ReadFile((HANDLE)fd, buf, (DWORD)len, &_amount, NULL)) {
 504                 *amount = 0;
 505
 506                 return 1;
 507         }
 508
 509         *amount = (unsigned long)_amount;
 510
 511         return 0;
 512 }
 513
 514 static int
 515 _lws_plat_file_write(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 516                      unsigned char* buf, unsigned long len)
 517 {
 518         (void)wsi;
 519         (void)fd;
 520         (void)amount;
 521         (void)buf;
 522         (void)len;
 523
 524         lwsl_err("%s: not implemented yet on this platform\n", __func__);
 525
 526         return -1;
 527 }
 528
 529 LWS_VISIBLE int
 530 lws_plat_init(struct lws_context *context,
 531               struct lws_context_creation_info *info)
 532 {
 533         struct lws_context_per_thread *pt = &context->pt[0];
 534         int i, n = context->count_threads;
 535
 536         for (i = 0; i < FD_HASHTABLE_MODULUS; i++) {
 537                 context->fd_hashtable[i].wsi =
 538                         lws_zalloc(sizeof(struct lws*) * context->max_fds);
 539
 540                 if (!context->fd_hashtable[i].wsi)
 541                         return -1;
 542         }
 543
 544         while (n--) {
 545                 pt->events = lws_malloc(sizeof(WSAEVENT) *
 546                                         (context->fd_limit_per_thread + 1));
 547                 if (pt->events == NULL) {
 548                         lwsl_err("Unable to allocate events array for %d connections\n",
 549                                         context->fd_limit_per_thread + 1);
 550                         return 1;
 551                 }
 552
 553                 pt->fds_count = 0;
 554                 pt->events[0] = WSACreateEvent();
 555
 556                 pt++;
 557         }
 558
 559         context->fd_random = 0;
 560
 561         context->fops.open      = _lws_plat_file_open;
 562         context->fops.close     = _lws_plat_file_close;
 563         context->fops.seek_cur  = _lws_plat_file_seek_cur;
 564         context->fops.read      = _lws_plat_file_read;
 565         context->fops.write     = _lws_plat_file_write;
 566
 567         return 0;
 568 }