lib/lws-plat-unix.c

   1 #include "private-libwebsockets.h"
   2
   3 #include <pwd.h>
   4 #include <grp.h>
   5
   6 #ifdef LWS_WITH_PLUGINS
   7 #include <dlfcn.h>
   8 #endif
   9 #include <dirent.h>
  10
  11
  12 /*
  13  * included from libwebsockets.c for unix builds
  14  */
  15
  16 unsigned long long time_in_microseconds(void)
  17 {
  18         struct timeval tv;
  19         gettimeofday(&tv, NULL);
  20         return ((unsigned long long)tv.tv_sec * 1000000LL) + tv.tv_usec;
  21 }
  22
  23 LWS_VISIBLE int
  24 lws_get_random(struct lws_context *context, void *buf, int len)
  25 {
  26         return read(context->fd_random, (char *)buf, len);
  27 }
  28
  29 LWS_VISIBLE int
  30 lws_send_pipe_choked(struct lws *wsi)
  31 {
  32         struct lws_pollfd fds;
  33
  34         /* treat the fact we got a truncated send pending as if we're choked */
  35         if (wsi->trunc_len)
  36                 return 1;
  37
  38         fds.fd = wsi->desc.sockfd;
  39         fds.events = POLLOUT;
  40         fds.revents = 0;
  41
  42         if (poll(&fds, 1, 0) != 1)
  43                 return 1;
  44
  45         if ((fds.revents & POLLOUT) == 0)
  46                 return 1;
  47
  48         /* okay to send another packet without blocking */
  49
  50         return 0;
  51 }
  52
  53 LWS_VISIBLE int
  54 lws_poll_listen_fd(struct lws_pollfd *fd)
  55 {
  56         return poll(fd, 1, 0);
  57 }
  58
  59 LWS_VISIBLE void
  60 lws_cancel_service_pt(struct lws *wsi)
  61 {
  62         struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
  63         char buf = 0;
  64
  65         if (write(pt->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1)
  66                 lwsl_err("Cannot write to dummy pipe");
  67 }
  68
  69 LWS_VISIBLE void
  70 lws_cancel_service(struct lws_context *context)
  71 {
  72         struct lws_context_per_thread *pt = &context->pt[0];
  73         char buf = 0, m = context->count_threads;
  74
  75         while (m--) {
  76                 if (write(pt->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1)
  77                         lwsl_err("Cannot write to dummy pipe");
  78                 pt++;
  79         }
  80 }
  81
  82 LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
  83 {
  84         int syslog_level = LOG_DEBUG;
  85
  86         switch (level) {
  87         case LLL_ERR:
  88                 syslog_level = LOG_ERR;
  89                 break;
  90         case LLL_WARN:
  91                 syslog_level = LOG_WARNING;
  92                 break;
  93         case LLL_NOTICE:
  94                 syslog_level = LOG_NOTICE;
  95                 break;
  96         case LLL_INFO:
  97                 syslog_level = LOG_INFO;
  98                 break;
  99         }
 100         syslog(syslog_level, "%s", line);
 101 }
 102
 103 LWS_VISIBLE LWS_EXTERN int
 104 _lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
 105 {
 106         struct lws_context_per_thread *pt;
 107         int n = -1, m, c;
 108         char buf;
 109
 110         /* stay dead once we are dead */
 111
 112         if (!context || !context->vhost_list)
 113                 return 1;
 114
 115         pt = &context->pt[tsi];
 116
 117         if (timeout_ms < 0)
 118                 goto faked_service;
 119
 120         lws_libev_run(context, tsi);
 121         lws_libuv_run(context, tsi);
 122
 123         if (!context->service_tid_detected) {
 124                 struct lws _lws;
 125
 126                 memset(&_lws, 0, sizeof(_lws));
 127                 _lws.context = context;
 128
 129                 context->service_tid_detected =
 130                         context->vhost_list->protocols[0].callback(
 131                         &_lws, LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
 132         }
 133         context->service_tid = context->service_tid_detected;
 134
 135         /*
 136          * is there anybody with pending stuff that needs service forcing?
 137          */
 138         if (!lws_service_adjust_timeout(context, 1, tsi)) {
 139                 /* -1 timeout means just do forced service */
 140                 _lws_plat_service_tsi(context, -1, pt->tid);
 141                 /* still somebody left who wants forced service? */
 142                 if (!lws_service_adjust_timeout(context, 1, pt->tid))
 143                         /* yes... come back again quickly */
 144                         timeout_ms = 0;
 145         }
 146
 147         n = poll(pt->fds, pt->fds_count, timeout_ms);
 148
 149 #ifdef LWS_OPENSSL_SUPPORT
 150         if (!pt->rx_draining_ext_list &&
 151             !lws_ssl_anybody_has_buffered_read_tsi(context, tsi) && !n) {
 152 #else
 153         if (!pt->rx_draining_ext_list && !n) /* poll timeout */ {
 154 #endif
 155                 lws_service_fd_tsi(context, NULL, tsi);
 156                 return 0;
 157         }
 158
 159 faked_service:
 160         m = lws_service_flag_pending(context, tsi);
 161         if (m)
 162                 c = -1; /* unknown limit */
 163         else
 164                 if (n < 0) {
 165                         if (LWS_ERRNO != LWS_EINTR)
 166                                 return -1;
 167                         return 0;
 168                 } else
 169                         c = n;
 170
 171         /* any socket with events to service? */
 172         for (n = 0; n < pt->fds_count && c; n++) {
 173                 if (!pt->fds[n].revents)
 174                         continue;
 175
 176                 c--;
 177
 178                 if (pt->fds[n].fd == pt->dummy_pipe_fds[0]) {
 179                         if (read(pt->fds[n].fd, &buf, 1) != 1)
 180                                 lwsl_err("Cannot read from dummy pipe.");
 181                         continue;
 182                 }
 183
 184                 m = lws_service_fd_tsi(context, &pt->fds[n], tsi);
 185                 if (m < 0)
 186                         return -1;
 187                 /* if something closed, retry this slot */
 188                 if (m)
 189                         n--;
 190         }
 191
 192         return 0;
 193 }
 194
 195 LWS_VISIBLE int
 196 lws_plat_check_connection_error(struct lws *wsi)
 197 {
 198         return 0;
 199 }
 200
 201 LWS_VISIBLE int
 202 lws_plat_service(struct lws_context *context, int timeout_ms)
 203 {
 204         return _lws_plat_service_tsi(context, timeout_ms, 0);
 205 }
 206
 207 LWS_VISIBLE int
 208 lws_plat_set_socket_options(struct lws_vhost *vhost, int fd)
 209 {
 210         int optval = 1;
 211         socklen_t optlen = sizeof(optval);
 212
 213 #if defined(__APPLE__) || \
 214     defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
 215     defined(__NetBSD__) || \
 216     defined(__OpenBSD__)
 217         struct protoent *tcp_proto;
 218 #endif
 219
 220         if (vhost->ka_time) {
 221                 /* enable keepalive on this socket */
 222                 optval = 1;
 223                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
 224                                (const void *)&optval, optlen) < 0)
 225                         return 1;
 226
 227 #if defined(__APPLE__) || \
 228     defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
 229     defined(__NetBSD__) || \
 230         defined(__CYGWIN__) || defined(__OpenBSD__) || defined (__sun)
 231
 232                 /*
 233                  * didn't find a way to set these per-socket, need to
 234                  * tune kernel systemwide values
 235                  */
 236 #else
 237                 /* set the keepalive conditions we want on it too */
 238                 optval = vhost->ka_time;
 239                 if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE,
 240                                (const void *)&optval, optlen) < 0)
 241                         return 1;
 242
 243                 optval = vhost->ka_interval;
 244                 if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL,
 245                                (const void *)&optval, optlen) < 0)
 246                         return 1;
 247
 248                 optval = vhost->ka_probes;
 249                 if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT,
 250                                (const void *)&optval, optlen) < 0)
 251                         return 1;
 252 #endif
 253         }
 254
 255         /* Disable Nagle */
 256         optval = 1;
 257 #if defined (__sun)
 258         if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
 259                 return 1;
 260 #elif !defined(__APPLE__) && \
 261       !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) &&        \
 262       !defined(__NetBSD__) && \
 263       !defined(__OpenBSD__)
 264         if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
 265                 return 1;
 266 #else
 267         tcp_proto = getprotobyname("TCP");
 268         if (setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen) < 0)
 269                 return 1;
 270 #endif
 271
 272         /* We are nonblocking... */
 273         if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
 274                 return 1;
 275
 276         return 0;
 277 }
 278
 279 LWS_VISIBLE void
 280 lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
 281 {
 282         if (info->gid != -1)
 283                 if (setgid(info->gid))
 284                         lwsl_warn("setgid: %s\n", strerror(LWS_ERRNO));
 285
 286         if (info->uid != -1) {
 287                 struct passwd *p = getpwuid(info->uid);
 288
 289                 if (p) {
 290                         initgroups(p->pw_name, info->gid);
 291                         if (setuid(info->uid))
 292                                 lwsl_warn("setuid: %s\n", strerror(LWS_ERRNO));
 293                         else
 294                                 lwsl_notice("Set privs to user '%s'\n", p->pw_name);
 295                 } else
 296                         lwsl_warn("getpwuid: unable to find uid %d", info->uid);
 297         }
 298 }
 299
 300 #ifdef LWS_WITH_PLUGINS
 301
 302 #if defined(LWS_USE_LIBUV) && UV_VERSION_MAJOR > 0
 303
 304 /* libuv.c implements these in a cross-platform way */
 305
 306 #else
 307
 308 static int filter(const struct dirent *ent)
 309 {
 310         if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
 311                 return 0;
 312
 313         return 1;
 314 }
 315
 316 LWS_VISIBLE int
 317 lws_plat_plugins_init(struct lws_context * context, const char * const *d)
 318 {
 319         struct lws_plugin_capability lcaps;
 320         struct lws_plugin *plugin;
 321         lws_plugin_init_func initfunc;
 322         struct dirent **namelist;
 323         int n, i, m, ret = 0;
 324         char path[256];
 325         void *l;
 326
 327         lwsl_notice("  Plugins:\n");
 328
 329         while (d && *d) {
 330                 n = scandir(*d, &namelist, filter, alphasort);
 331                 if (n < 0) {
 332                         lwsl_err("Scandir on %s failed\n", *d);
 333                         return 1;
 334                 }
 335
 336                 for (i = 0; i < n; i++) {
 337                         if (strlen(namelist[i]->d_name) < 7)
 338                                 goto inval;
 339
 340                         lwsl_notice("   %s\n", namelist[i]->d_name);
 341
 342                         lws_snprintf(path, sizeof(path) - 1, "%s/%s", *d,
 343                                  namelist[i]->d_name);
 344                         l = dlopen(path, RTLD_NOW);
 345                         if (!l) {
 346                                 lwsl_err("Error loading DSO: %s\n", dlerror());
 347                                 while (i++ < n)
 348                                         free(namelist[i]);
 349                                 goto bail;
 350                         }
 351                         /* we could open it, can we get his init function? */
 352                         m = lws_snprintf(path, sizeof(path) - 1, "init_%s",
 353                                      namelist[i]->d_name + 3 /* snip lib... */);
 354                         path[m - 3] = '\0'; /* snip the .so */
 355                         initfunc = dlsym(l, path);
 356                         if (!initfunc) {
 357                                 lwsl_err("Failed to get init on %s: %s",
 358                                                 namelist[i]->d_name, dlerror());
 359                                 dlclose(l);
 360                         }
 361                         lcaps.api_magic = LWS_PLUGIN_API_MAGIC;
 362                         m = initfunc(context, &lcaps);
 363                         if (m) {
 364                                 lwsl_err("Initializing %s failed %d\n",
 365                                         namelist[i]->d_name, m);
 366                                 dlclose(l);
 367                                 goto skip;
 368                         }
 369
 370                         plugin = lws_malloc(sizeof(*plugin));
 371                         if (!plugin) {
 372                                 lwsl_err("OOM\n");
 373                                 goto bail;
 374                         }
 375                         plugin->list = context->plugin_list;
 376                         context->plugin_list = plugin;
 377                         strncpy(plugin->name, namelist[i]->d_name, sizeof(plugin->name) - 1);
 378                         plugin->name[sizeof(plugin->name) - 1] = '\0';
 379                         plugin->l = l;
 380                         plugin->caps = lcaps;
 381                         context->plugin_protocol_count += lcaps.count_protocols;
 382                         context->plugin_extension_count += lcaps.count_extensions;
 383
 384                         free(namelist[i]);
 385                         continue;
 386
 387         skip:
 388                         dlclose(l);
 389         inval:
 390                         free(namelist[i]);
 391                 }
 392                 free(namelist);
 393                 d++;
 394         }
 395
 396 bail:
 397         free(namelist);
 398
 399         return ret;
 400 }
 401
 402 LWS_VISIBLE int
 403 lws_plat_plugins_destroy(struct lws_context * context)
 404 {
 405         struct lws_plugin *plugin = context->plugin_list, *p;
 406         lws_plugin_destroy_func func;
 407         char path[256];
 408         int m;
 409
 410         if (!plugin)
 411                 return 0;
 412
 413         lwsl_notice("%s\n", __func__);
 414
 415         while (plugin) {
 416                 p = plugin;
 417                 m = lws_snprintf(path, sizeof(path) - 1, "destroy_%s", plugin->name + 3);
 418                 path[m - 3] = '\0';
 419                 func = dlsym(plugin->l, path);
 420                 if (!func) {
 421                         lwsl_err("Failed to get destroy on %s: %s",
 422                                         plugin->name, dlerror());
 423                         goto next;
 424                 }
 425                 m = func(context);
 426                 if (m)
 427                         lwsl_err("Initializing %s failed %d\n",
 428                                 plugin->name, m);
 429 next:
 430                 dlclose(p->l);
 431                 plugin = p->list;
 432                 p->list = NULL;
 433                 free(p);
 434         }
 435
 436         context->plugin_list = NULL;
 437
 438         return 0;
 439 }
 440
 441 #endif
 442 #endif
 443
 444
 445 #if 0
 446 static void
 447 sigabrt_handler(int x)
 448 {
 449         printf("%s\n", __func__);
 450         //*(char *)0 = 0;
 451 }
 452 #endif
 453
 454 LWS_VISIBLE int
 455 lws_plat_context_early_init(void)
 456 {
 457         signal(SIGPIPE, SIG_IGN);
 458
 459 //      signal(SIGABRT, sigabrt_handler);
 460
 461         return 0;
 462 }
 463
 464 LWS_VISIBLE void
 465 lws_plat_context_early_destroy(struct lws_context *context)
 466 {
 467 }
 468
 469 LWS_VISIBLE void
 470 lws_plat_context_late_destroy(struct lws_context *context)
 471 {
 472         struct lws_context_per_thread *pt = &context->pt[0];
 473         int m = context->count_threads;
 474
 475 #ifdef LWS_WITH_PLUGINS
 476         if (context->plugin_list)
 477                 lws_plat_plugins_destroy(context);
 478 #endif
 479
 480         if (context->lws_lookup)
 481                 lws_free(context->lws_lookup);
 482
 483         while (m--) {
 484                 if (pt->dummy_pipe_fds[0])
 485                         close(pt->dummy_pipe_fds[0]);
 486                 if (pt->dummy_pipe_fds[1])
 487                         close(pt->dummy_pipe_fds[1]);
 488                 pt++;
 489         }
 490         if (!context->fd_random)
 491                 lwsl_err("ZERO RANDOM FD\n");
 492         if (context->fd_random != LWS_INVALID_FILE)
 493                 close(context->fd_random);
 494 }
 495
 496 /* cast a struct sockaddr_in6 * into addr for ipv6 */
 497
 498 LWS_VISIBLE int
 499 lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
 500                     size_t addrlen)
 501 {
 502         int rc = -1;
 503
 504         struct ifaddrs *ifr;
 505         struct ifaddrs *ifc;
 506 #ifdef LWS_USE_IPV6
 507         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
 508 #endif
 509
 510         getifaddrs(&ifr);
 511         for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) {
 512                 if (!ifc->ifa_addr)
 513                         continue;
 514
 515                 lwsl_info(" interface %s vs %s\n", ifc->ifa_name, ifname);
 516
 517                 if (strcmp(ifc->ifa_name, ifname))
 518                         continue;
 519
 520                 switch (ifc->ifa_addr->sa_family) {
 521                 case AF_INET:
 522 #ifdef LWS_USE_IPV6
 523                         if (ipv6) {
 524                                 /* map IPv4 to IPv6 */
 525                                 bzero((char *)&addr6->sin6_addr,
 526                                                 sizeof(struct in6_addr));
 527                                 addr6->sin6_addr.s6_addr[10] = 0xff;
 528                                 addr6->sin6_addr.s6_addr[11] = 0xff;
 529                                 memcpy(&addr6->sin6_addr.s6_addr[12],
 530                                         &((struct sockaddr_in *)ifc->ifa_addr)->sin_addr,
 531                                                         sizeof(struct in_addr));
 532                         } else
 533 #endif
 534                                 memcpy(addr,
 535                                         (struct sockaddr_in *)ifc->ifa_addr,
 536                                                     sizeof(struct sockaddr_in));
 537                         break;
 538 #ifdef LWS_USE_IPV6
 539                 case AF_INET6:
 540                         memcpy(&addr6->sin6_addr,
 541                           &((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr,
 542                                                        sizeof(struct in6_addr));
 543                         break;
 544 #endif
 545                 default:
 546                         continue;
 547                 }
 548                 rc = 0;
 549         }
 550
 551         freeifaddrs(ifr);
 552
 553         if (rc == -1) {
 554                 /* check if bind to IP address */
 555 #ifdef LWS_USE_IPV6
 556                 if (inet_pton(AF_INET6, ifname, &addr6->sin6_addr) == 1)
 557                         rc = 0;
 558                 else
 559 #endif
 560                 if (inet_pton(AF_INET, ifname, &addr->sin_addr) == 1)
 561                         rc = 0;
 562         }
 563
 564         return rc;
 565 }
 566
 567 LWS_VISIBLE void
 568 lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi)
 569 {
 570         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 571
 572         lws_libev_io(wsi, LWS_EV_START | LWS_EV_READ);
 573         lws_libuv_io(wsi, LWS_EV_START | LWS_EV_READ);
 574
 575         pt->fds[pt->fds_count++].revents = 0;
 576 }
 577
 578 LWS_VISIBLE void
 579 lws_plat_delete_socket_from_fds(struct lws_context *context,
 580                                                 struct lws *wsi, int m)
 581 {
 582         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 583
 584         lws_libev_io(wsi, LWS_EV_STOP | LWS_EV_READ | LWS_EV_WRITE);
 585         lws_libuv_io(wsi, LWS_EV_STOP | LWS_EV_READ | LWS_EV_WRITE);
 586
 587         pt->fds_count--;
 588 }
 589
 590 LWS_VISIBLE void
 591 lws_plat_service_periodic(struct lws_context *context)
 592 {
 593         /* if our parent went down, don't linger around */
 594         if (context->started_with_parent &&
 595             kill(context->started_with_parent, 0) < 0)
 596                 kill(getpid(), SIGTERM);
 597 }
 598
 599 LWS_VISIBLE int
 600 lws_plat_change_pollfd(struct lws_context *context,
 601                       struct lws *wsi, struct lws_pollfd *pfd)
 602 {
 603         return 0;
 604 }
 605
 606 LWS_VISIBLE const char *
 607 lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
 608 {
 609         return inet_ntop(af, src, dst, cnt);
 610 }
 611
 612 LWS_VISIBLE lws_fop_fd_t
 613 _lws_plat_file_open(const struct lws_plat_file_ops *fops, const char *filename,
 614                     const char *vpath, lws_fop_flags_t *flags)
 615 {
 616         struct stat stat_buf;
 617         int ret = open(filename, (*flags) & LWS_FOP_FLAGS_MASK, 0664);
 618         lws_fop_fd_t fop_fd;
 619
 620         if (ret < 0)
 621                 return NULL;
 622
 623         if (fstat(ret, &stat_buf) < 0)
 624                 goto bail;
 625
 626         fop_fd = malloc(sizeof(*fop_fd));
 627         if (!fop_fd)
 628                 goto bail;
 629
 630         fop_fd->fops = fops;
 631         fop_fd->flags = *flags;
 632         fop_fd->fd = ret;
 633         fop_fd->filesystem_priv = NULL; /* we don't use it */
 634         fop_fd->len = stat_buf.st_size;
 635         fop_fd->pos = 0;
 636
 637         return fop_fd;
 638
 639 bail:
 640         close(ret);
 641         return NULL;
 642 }
 643
 644 LWS_VISIBLE int
 645 _lws_plat_file_close(lws_fop_fd_t *fop_fd)
 646 {
 647         int fd = (*fop_fd)->fd;
 648
 649         free(*fop_fd);
 650         *fop_fd = NULL;
 651
 652         return close(fd);
 653 }
 654
 655 LWS_VISIBLE lws_fileofs_t
 656 _lws_plat_file_seek_cur(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
 657 {
 658         lws_fileofs_t r;
 659
 660         if (offset > 0 && offset > fop_fd->len - fop_fd->pos)
 661                 offset = fop_fd->len - fop_fd->pos;
 662
 663         if ((lws_fileofs_t)fop_fd->pos + offset < 0)
 664                 offset = -fop_fd->pos;
 665
 666         r = lseek(fop_fd->fd, offset, SEEK_CUR);
 667
 668         if (r >= 0)
 669                 fop_fd->pos = r;
 670         else
 671                 lwsl_err("error seeking from cur %ld, offset %ld\n",
 672                          fop_fd->pos, offset);
 673
 674         return r;
 675 }
 676
 677 LWS_VISIBLE int
 678 _lws_plat_file_read(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
 679                     uint8_t *buf, lws_filepos_t len)
 680 {
 681         long n;
 682
 683         n = read((int)fop_fd->fd, buf, len);
 684         if (n == -1) {
 685                 *amount = 0;
 686                 return -1;
 687         }
 688         fop_fd->pos += n;
 689         lwsl_debug("%s: read %ld of req %ld, pos %ld, len %ld\n", __func__, n,
 690                    (long)len, fop_fd->pos, fop_fd->len);
 691         *amount = n;
 692
 693         return 0;
 694 }
 695
 696 LWS_VISIBLE int
 697 _lws_plat_file_write(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
 698                      uint8_t *buf, lws_filepos_t len)
 699 {
 700         long n;
 701
 702         n = write((int)fop_fd->fd, buf, len);
 703         if (n == -1) {
 704                 *amount = 0;
 705                 return -1;
 706         }
 707
 708         fop_fd->pos += n;
 709         *amount = n;
 710
 711         return 0;
 712 }
 713
 714
 715 LWS_VISIBLE int
 716 lws_plat_init(struct lws_context *context,
 717               struct lws_context_creation_info *info)
 718 {
 719         struct lws_context_per_thread *pt = &context->pt[0];
 720         int n = context->count_threads, fd;
 721
 722         /* master context has the global fd lookup array */
 723         context->lws_lookup = lws_zalloc(sizeof(struct lws *) *
 724                                          context->max_fds);
 725         if (context->lws_lookup == NULL) {
 726                 lwsl_err("OOM on lws_lookup array for %d connections\n",
 727                          context->max_fds);
 728                 return 1;
 729         }
 730
 731         lwsl_notice(" mem: platform fd map: %5lu bytes\n",
 732                     (unsigned long)(sizeof(struct lws *) * context->max_fds));
 733         fd = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY);
 734
 735         context->fd_random = fd;
 736         if (context->fd_random < 0) {
 737                 lwsl_err("Unable to open random device %s %d\n",
 738                          SYSTEM_RANDOM_FILEPATH, context->fd_random);
 739                 return 1;
 740         }
 741
 742         if (!lws_libev_init_fd_table(context) &&
 743             !lws_libuv_init_fd_table(context)) {
 744                 /* otherwise libev handled it instead */
 745
 746                 while (n--) {
 747                         if (pipe(pt->dummy_pipe_fds)) {
 748                                 lwsl_err("Unable to create pipe\n");
 749                                 return 1;
 750                         }
 751
 752                         /* use the read end of pipe as first item */
 753                         pt->fds[0].fd = pt->dummy_pipe_fds[0];
 754                         pt->fds[0].events = LWS_POLLIN;
 755                         pt->fds[0].revents = 0;
 756                         pt->fds_count = 1;
 757                         pt++;
 758                 }
 759         }
 760
 761 #ifdef LWS_WITH_PLUGINS
 762         if (info->plugin_dirs)
 763                 lws_plat_plugins_init(context, info->plugin_dirs);
 764 #endif
 765
 766         return 0;
 767 }