test-server/test-server-http.c

   1 /*
   2  * libwebsockets-test-server - libwebsockets test implementation
   3  *
   4  * Copyright (C) 2010-2016 Andy Green <andy@warmcat.com>
   5  *
   6  * This file is made available under the Creative Commons CC0 1.0
   7  * Universal Public Domain Dedication.
   8  *
   9  * The person who associated a work with this deed has dedicated
  10  * the work to the public domain by waiving all of his or her rights
  11  * to the work worldwide under copyright law, including all related
  12  * and neighboring rights, to the extent allowed by law. You can copy,
  13  * modify, distribute and perform the work, even for commercial purposes,
  14  * all without asking permission.
  15  *
  16  * The test apps are intended to be adapted for use in your code, which
  17  * may be proprietary.  So unlike the library itself, they are licensed
  18  * Public Domain.
  19  */
  20 #include "test-server.h"
  21
  22 /*
  23  * This demo server shows how to use libwebsockets for one or more
  24  * websocket protocols in the same server
  25  *
  26  * It defines the following websocket protocols:
  27  *
  28  *  dumb-increment-protocol:  once the socket is opened, an incrementing
  29  *                              ascii string is sent down it every 50ms.
  30  *                              If you send "reset\n" on the websocket, then
  31  *                              the incrementing number is reset to 0.
  32  *
  33  *  lws-mirror-protocol: copies any received packet to every connection also
  34  *                              using this protocol, including the sender
  35  */
  36
  37 #if defined(LWS_USE_POLARSSL)
  38 #else
  39 #if defined(LWS_USE_MBEDTLS)
  40 #else
  41 #if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
  42 /* location of the certificate revocation list */
  43 extern char crl_path[1024];
  44 #endif
  45 #endif
  46 #endif
  47
  48 extern int debug_level;
  49
  50 enum demo_protocols {
  51         /* always first */
  52         PROTOCOL_HTTP = 0,
  53
  54         PROTOCOL_DUMB_INCREMENT,
  55         PROTOCOL_LWS_MIRROR,
  56
  57         /* always last */
  58         DEMO_PROTOCOL_COUNT
  59 };
  60
  61 /*
  62  * We take a strict whitelist approach to stop ../ attacks
  63  */
  64 struct serveable {
  65         const char *urlpath;
  66         const char *mimetype;
  67 };
  68
  69 /*
  70  * this is just an example of parsing handshake headers, you don't need this
  71  * in your code unless you will filter allowing connections by the header
  72  * content
  73  */
  74 void
  75 dump_handshake_info(struct lws *wsi)
  76 {
  77         int n = 0, len;
  78         char buf[256];
  79         const unsigned char *c;
  80
  81         do {
  82                 c = lws_token_to_string(n);
  83                 if (!c) {
  84                         n++;
  85                         continue;
  86                 }
  87
  88                 len = lws_hdr_total_length(wsi, n);
  89                 if (!len || len > sizeof(buf) - 1) {
  90                         n++;
  91                         continue;
  92                 }
  93
  94                 lws_hdr_copy(wsi, buf, sizeof buf, n);
  95                 buf[sizeof(buf) - 1] = '\0';
  96
  97                 fprintf(stderr, "    %s = %s\n", (char *)c, buf);
  98                 n++;
  99         } while (c);
 100 }
 101
 102 const char * get_mimetype(const char *file)
 103 {
 104         int n = strlen(file);
 105
 106         if (n < 5)
 107                 return NULL;
 108
 109         if (!strcmp(&file[n - 4], ".ico"))
 110                 return "image/x-icon";
 111
 112         if (!strcmp(&file[n - 4], ".png"))
 113                 return "image/png";
 114
 115         if (!strcmp(&file[n - 5], ".html"))
 116                 return "text/html";
 117
 118         if (!strcmp(&file[n - 4], ".css"))
 119                 return "text/css";
 120
 121         if (!strcmp(&file[n - 3], ".js"))
 122                 return "text/javascript";
 123
 124         return NULL;
 125 }
 126
 127
 128 static const char * const param_names[] = {
 129         "text",
 130         "send",
 131         "file",
 132         "upload",
 133 };
 134
 135 enum enum_param_names {
 136         EPN_TEXT,
 137         EPN_SEND,
 138         EPN_FILE,
 139         EPN_UPLOAD,
 140 };
 141
 142 static int
 143 file_upload_cb(void *data, const char *name, const char *filename,
 144                char *buf, int len, enum lws_spa_fileupload_states state)
 145 {
 146         struct per_session_data__http *pss =
 147                         (struct per_session_data__http *)data;
 148         int n;
 149
 150         switch (state) {
 151         case LWS_UFS_OPEN:
 152                 strncpy(pss->filename, filename, sizeof(pss->filename) - 1);
 153                 /* we get the original filename in @filename arg, but for
 154                  * simple demo use a fixed name so we don't have to deal with
 155                  * attacks  */
 156                 pss->post_fd = open("/tmp/post-file",
 157                                O_CREAT | O_TRUNC | O_RDWR, 0600);
 158                 break;
 159         case LWS_UFS_FINAL_CONTENT:
 160         case LWS_UFS_CONTENT:
 161                 if (len) {
 162                         pss->file_length += len;
 163
 164                         /* if the file length is too big, drop it */
 165                         if (pss->file_length > 100000)
 166                                 return 1;
 167
 168                         n = write(pss->post_fd, buf, len);
 169                         lwsl_notice("%s: write %d says %d\n", __func__, len, n);
 170                 }
 171                 if (state == LWS_UFS_CONTENT)
 172                         break;
 173                 close(pss->post_fd);
 174                 pss->post_fd = LWS_INVALID_FILE;
 175                 break;
 176         }
 177
 178         return 0;
 179 }
 180
 181 /* this protocol server (always the first one) handles HTTP,
 182  *
 183  * Some misc callbacks that aren't associated with a protocol also turn up only
 184  * here on the first protocol server.
 185  */
 186
 187 int callback_http(struct lws *wsi, enum lws_callback_reasons reason, void *user,
 188                   void *in, size_t len)
 189 {
 190         struct per_session_data__http *pss =
 191                         (struct per_session_data__http *)user;
 192         unsigned char buffer[4096 + LWS_PRE];
 193         unsigned long amount, file_len, sent;
 194         char leaf_path[1024];
 195         const char *mimetype;
 196         char *other_headers;
 197         unsigned char *end, *start;
 198         struct timeval tv;
 199         unsigned char *p;
 200 #ifndef LWS_NO_CLIENT
 201         struct per_session_data__http *pss1;
 202         struct lws *wsi1;
 203 #endif
 204         char buf[256];
 205         char b64[64];
 206         int n, m;
 207 #ifdef EXTERNAL_POLL
 208         struct lws_pollargs *pa = (struct lws_pollargs *)in;
 209 #endif
 210
 211
 212         switch (reason) {
 213         case LWS_CALLBACK_HTTP:
 214
 215                 lwsl_info("lws_http_serve: %s\n", (const char *)in);
 216
 217                 if (debug_level & LLL_INFO) {
 218                         dump_handshake_info(wsi);
 219
 220                         /* dump the individual URI Arg parameters */
 221                         n = 0;
 222                         while (lws_hdr_copy_fragment(wsi, buf, sizeof(buf),
 223                                                      WSI_TOKEN_HTTP_URI_ARGS, n) > 0) {
 224                                 lwsl_notice("URI Arg %d: %s\n", ++n, buf);
 225                         }
 226                 }
 227
 228                 {
 229                         lws_get_peer_simple(wsi, buf, sizeof(buf));
 230                         lwsl_info("HTTP connect from %s\n", buf);
 231                 }
 232
 233                 if (len < 1) {
 234                         lws_return_http_status(wsi,
 235                                                 HTTP_STATUS_BAD_REQUEST, NULL);
 236                         goto try_to_reuse;
 237                 }
 238
 239 #ifndef LWS_NO_CLIENT
 240                 if (!strncmp(in, "/proxytest", 10)) {
 241                         struct lws_client_connect_info i;
 242                         char *rootpath = "/";
 243                         const char *p = (const char *)in;
 244
 245                         if (lws_get_child(wsi))
 246                                 break;
 247
 248                         pss->client_finished = 0;
 249                         memset(&i,0, sizeof(i));
 250                         i.context = lws_get_context(wsi);
 251                         i.address = "git.libwebsockets.org";
 252                         i.port = 80;
 253                         i.ssl_connection = 0;
 254                         if (p[10])
 255                                 i.path = (char *)in + 10;
 256                         else
 257                                 i.path = rootpath;
 258                         i.host = "git.libwebsockets.org";
 259                         i.origin = NULL;
 260                         i.method = "GET";
 261                         i.parent_wsi = wsi;
 262                         i.uri_replace_from = "git.libwebsockets.org/";
 263                         i.uri_replace_to = "/proxytest/";
 264                         if (!lws_client_connect_via_info(&i)) {
 265                                 lwsl_err("proxy connect fail\n");
 266                                 break;
 267                         }
 268
 269
 270
 271                         break;
 272                 }
 273 #endif
 274
 275 #if 1
 276                 /* this example server has no concept of directories */
 277                 if (strchr((const char *)in + 1, '/')) {
 278                         lws_return_http_status(wsi, HTTP_STATUS_NOT_ACCEPTABLE, NULL);
 279                         goto try_to_reuse;
 280                 }
 281 #endif
 282
 283                 /* if a legal POST URL, let it continue and accept data */
 284                 if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI))
 285                         return 0;
 286
 287                 /* check for the "send a big file by hand" example case */
 288
 289                 if (!strcmp((const char *)in, "/leaf.jpg")) {
 290                         if (strlen(resource_path) > sizeof(leaf_path) - 10)
 291                                 return -1;
 292                         sprintf(leaf_path, "%s/leaf.jpg", resource_path);
 293
 294                         /* well, let's demonstrate how to send the hard way */
 295
 296                         p = buffer + LWS_PRE;
 297                         end = p + sizeof(buffer) - LWS_PRE;
 298
 299                         pss->fd = lws_plat_file_open(wsi, leaf_path, &file_len,
 300                                                      LWS_O_RDONLY);
 301
 302                         if (pss->fd == LWS_INVALID_FILE) {
 303                                 lwsl_err("failed to open file %s\n", leaf_path);
 304                                 return -1;
 305                         }
 306
 307                         /*
 308                          * we will send a big jpeg file, but it could be
 309                          * anything.  Set the Content-Type: appropriately
 310                          * so the browser knows what to do with it.
 311                          *
 312                          * Notice we use the APIs to build the header, which
 313                          * will do the right thing for HTTP 1/1.1 and HTTP2
 314                          * depending on what connection it happens to be working
 315                          * on
 316                          */
 317                         if (lws_add_http_header_status(wsi, 200, &p, end))
 318                                 return 1;
 319                         if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_SERVER,
 320                                         (unsigned char *)"libwebsockets",
 321                                         13, &p, end))
 322                                 return 1;
 323                         if (lws_add_http_header_by_token(wsi,
 324                                         WSI_TOKEN_HTTP_CONTENT_TYPE,
 325                                         (unsigned char *)"image/jpeg",
 326                                         10, &p, end))
 327                                 return 1;
 328                         if (lws_add_http_header_content_length(wsi,
 329                                                                file_len, &p,
 330                                                                end))
 331                                 return 1;
 332                         if (lws_finalize_http_header(wsi, &p, end))
 333                                 return 1;
 334
 335                         /*
 336                          * send the http headers...
 337                          * this won't block since it's the first payload sent
 338                          * on the connection since it was established
 339                          * (too small for partial)
 340                          *
 341                          * Notice they are sent using LWS_WRITE_HTTP_HEADERS
 342                          * which also means you can't send body too in one step,
 343                          * this is mandated by changes in HTTP2
 344                          */
 345
 346                         *p = '\0';
 347                         lwsl_info("%s\n", buffer + LWS_PRE);
 348
 349                         n = lws_write(wsi, buffer + LWS_PRE,
 350                                       p - (buffer + LWS_PRE),
 351                                       LWS_WRITE_HTTP_HEADERS);
 352                         if (n < 0) {
 353                                 lws_plat_file_close(wsi, pss->fd);
 354                                 return -1;
 355                         }
 356                         /*
 357                          * book us a LWS_CALLBACK_HTTP_WRITEABLE callback
 358                          */
 359                         lws_callback_on_writable(wsi);
 360                         break;
 361                 }
 362
 363                 /* if not, send a file the easy way */
 364                 if (!strncmp(in, "/cgit-data/", 11)) {
 365                         in = (char *)in + 11;
 366                         strcpy(buf, "/usr/share/cgit");
 367                 } else
 368                         strcpy(buf, resource_path);
 369
 370                 if (strcmp(in, "/")) {
 371                         if (*((const char *)in) != '/')
 372                                 strcat(buf, "/");
 373                         strncat(buf, in, sizeof(buf) - strlen(buf) - 1);
 374                 } else /* default file to serve */
 375                         strcat(buf, "/test.html");
 376                 buf[sizeof(buf) - 1] = '\0';
 377
 378                 /* refuse to serve files we don't understand */
 379                 mimetype = get_mimetype(buf);
 380                 if (!mimetype) {
 381                         lwsl_err("Unknown mimetype for %s\n", buf);
 382                         lws_return_http_status(wsi,
 383                                       HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE, NULL);
 384                         return -1;
 385                 }
 386
 387                 /* demonstrates how to set a cookie on / */
 388
 389                 other_headers = leaf_path;
 390                 p = (unsigned char *)leaf_path;
 391                 if (!strcmp((const char *)in, "/") &&
 392                            !lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_COOKIE)) {
 393                         /* this isn't very unguessable but it'll do for us */
 394                         gettimeofday(&tv, NULL);
 395                         n = sprintf(b64, "test=LWS_%u_%u_COOKIE;Max-Age=360000",
 396                                 (unsigned int)tv.tv_sec,
 397                                 (unsigned int)tv.tv_usec);
 398
 399                         if (lws_add_http_header_by_name(wsi,
 400                                 (unsigned char *)"set-cookie:",
 401                                 (unsigned char *)b64, n, &p,
 402                                 (unsigned char *)leaf_path + sizeof(leaf_path)))
 403                                 return 1;
 404                 }
 405                 if (lws_is_ssl(wsi) && lws_add_http_header_by_name(wsi,
 406                                                 (unsigned char *)
 407                                                 "Strict-Transport-Security:",
 408                                                 (unsigned char *)
 409                                                 "max-age=15768000 ; "
 410                                                 "includeSubDomains", 36, &p,
 411                                                 (unsigned char *)leaf_path +
 412                                                         sizeof(leaf_path)))
 413                         return 1;
 414                 n = (char *)p - leaf_path;
 415
 416                 n = lws_serve_http_file(wsi, buf, mimetype, other_headers, n);
 417                 if (n < 0 || ((n > 0) && lws_http_transaction_completed(wsi)))
 418                         return -1; /* error or can't reuse connection: close the socket */
 419
 420                 /*
 421                  * notice that the sending of the file completes asynchronously,
 422                  * we'll get a LWS_CALLBACK_HTTP_FILE_COMPLETION callback when
 423                  * it's done
 424                  */
 425                 break;
 426
 427         case LWS_CALLBACK_HTTP_BODY:
 428                 /* create the POST argument parser if not already existing */
 429                 if (!pss->spa) {
 430                         pss->spa = lws_spa_create(wsi, param_names,
 431                                         ARRAY_SIZE(param_names), 1024,
 432                                         file_upload_cb, pss);
 433                         if (!pss->spa)
 434                                 return -1;
 435
 436                         pss->filename[0] = '\0';
 437                         pss->file_length = 0;
 438                 }
 439
 440                 /* let it parse the POST data */
 441                 if (lws_spa_process(pss->spa, in, len))
 442                         return -1;
 443                 break;
 444
 445         case LWS_CALLBACK_HTTP_BODY_COMPLETION:
 446                 lwsl_debug("LWS_CALLBACK_HTTP_BODY_COMPLETION\n");
 447                 /*
 448                  * the whole of the sent body arrived,
 449                  * respond to the client with a redirect to show the
 450                  * results
 451                  */
 452
 453                 /* call to inform no more payload data coming */
 454                 lws_spa_finalize(pss->spa);
 455
 456                 p = (unsigned char *)pss->result + LWS_PRE;
 457                 end = p + sizeof(pss->result) - LWS_PRE - 1;
 458                 p += sprintf((char *)p,
 459                         "<html><body><h1>Form results (after urldecoding)</h1>"
 460                         "<table><tr><td>Name</td><td>Length</td><td>Value</td></tr>");
 461
 462                 for (n = 0; n < ARRAY_SIZE(param_names); n++)
 463                         p += lws_snprintf((char *)p, end - p,
 464                                     "<tr><td><b>%s</b></td><td>%d</td><td>%s</td></tr>",
 465                                     param_names[n],
 466                                     lws_spa_get_length(pss->spa, n),
 467                                     lws_spa_get_string(pss->spa, n));
 468
 469                 p += lws_snprintf((char *)p, end - p, "</table><br><b>filename:</b> %s, <b>length</b> %ld",
 470                                 pss->filename, pss->file_length);
 471
 472                 p += lws_snprintf((char *)p, end - p, "</body></html>");
 473                 pss->result_len = p - (unsigned char *)(pss->result + LWS_PRE);
 474
 475                 p = buffer + LWS_PRE;
 476                 start = p;
 477                 end = p + sizeof(buffer) - LWS_PRE;
 478
 479                 if (lws_add_http_header_status(wsi, 200, &p, end))
 480                         return 1;
 481
 482                 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE,
 483                                 (unsigned char *)"text/html", 9, &p, end))
 484                         return 1;
 485                 if (lws_add_http_header_content_length(wsi, pss->result_len, &p, end))
 486                         return 1;
 487                 if (lws_finalize_http_header(wsi, &p, end))
 488                         return 1;
 489
 490                 n = lws_write(wsi, start, p - start, LWS_WRITE_HTTP_HEADERS);
 491                 if (n < 0)
 492                         return 1;
 493
 494                 n = lws_write(wsi, (unsigned char *)pss->result + LWS_PRE,
 495                               pss->result_len, LWS_WRITE_HTTP);
 496                 if (n < 0)
 497                         return 1;
 498                 goto try_to_reuse;
 499         case LWS_CALLBACK_HTTP_DROP_PROTOCOL:
 500                 lwsl_debug("LWS_CALLBACK_HTTP_DROP_PROTOCOL\n");
 501
 502                 /* called when our wsi user_space is going to be destroyed */
 503                 if (pss->spa) {
 504                         lws_spa_destroy(pss->spa);
 505                         pss->spa = NULL;
 506                 }
 507                 break;
 508         case LWS_CALLBACK_HTTP_FILE_COMPLETION:
 509                 goto try_to_reuse;
 510
 511         case LWS_CALLBACK_HTTP_WRITEABLE:
 512                 lwsl_info("LWS_CALLBACK_HTTP_WRITEABLE\n");
 513
 514                 if (pss->client_finished)
 515                         return -1;
 516
 517                 if (pss->fd == LWS_INVALID_FILE)
 518                         goto try_to_reuse;
 519
 520 #ifndef LWS_NO_CLIENT
 521                 if (pss->reason_bf & 2) {
 522                         char *px = buf + LWS_PRE;
 523                         int lenx = sizeof(buf) - LWS_PRE;
 524                         /*
 525                          * our sink is writeable and our source has something
 526                          * to read.  So read a lump of source material of
 527                          * suitable size to send or what's available, whichever
 528                          * is the smaller.
 529                          */
 530                         pss->reason_bf &= ~2;
 531                         wsi1 = lws_get_child(wsi);
 532                         if (!wsi1)
 533                                 break;
 534                         if (lws_http_client_read(wsi1, &px, &lenx) < 0)
 535                                 goto bail;
 536
 537                         if (pss->client_finished)
 538                                 return -1;
 539                         break;
 540                 }
 541 #endif
 542                 /*
 543                  * we can send more of whatever it is we were sending
 544                  */
 545                 sent = 0;
 546                 do {
 547                         /* we'd like the send this much */
 548                         n = sizeof(buffer) - LWS_PRE;
 549
 550                         /* but if the peer told us he wants less, we can adapt */
 551                         m = lws_get_peer_write_allowance(wsi);
 552
 553                         /* -1 means not using a protocol that has this info */
 554                         if (m == 0)
 555                                 /* right now, peer can't handle anything */
 556                                 goto later;
 557
 558                         if (m != -1 && m < n)
 559                                 /* he couldn't handle that much */
 560                                 n = m;
 561
 562                         n = lws_plat_file_read(wsi, pss->fd,
 563                                                &amount, buffer + LWS_PRE, n);
 564                         /* problem reading, close conn */
 565                         if (n < 0) {
 566                                 lwsl_err("problem reading file\n");
 567                                 goto bail;
 568                         }
 569                         n = (int)amount;
 570                         /* sent it all, close conn */
 571                         if (n == 0)
 572                                 goto penultimate;
 573                         /*
 574                          * To support HTTP2, must take care about preamble space
 575                          *
 576                          * identification of when we send the last payload frame
 577                          * is handled by the library itself if you sent a
 578                          * content-length header
 579                          */
 580                         m = lws_write(wsi, buffer + LWS_PRE, n, LWS_WRITE_HTTP);
 581                         if (m < 0) {
 582                                 lwsl_err("write failed\n");
 583                                 /* write failed, close conn */
 584                                 goto bail;
 585                         }
 586                         if (m) /* while still active, extend timeout */
 587                                 lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT, 5);
 588                         sent += m;
 589
 590                 } while (!lws_send_pipe_choked(wsi) && (sent < 1024 * 1024));
 591 later:
 592                 lws_callback_on_writable(wsi);
 593                 break;
 594 penultimate:
 595                 lws_plat_file_close(wsi, pss->fd);
 596                 pss->fd = LWS_INVALID_FILE;
 597                 goto try_to_reuse;
 598
 599 bail:
 600                 lws_plat_file_close(wsi, pss->fd);
 601
 602                 return -1;
 603
 604         /*
 605          * callback for confirming to continue with client IP appear in
 606          * protocol 0 callback since no websocket protocol has been agreed
 607          * yet.  You can just ignore this if you won't filter on client IP
 608          * since the default unhandled callback return is 0 meaning let the
 609          * connection continue.
 610          */
 611         case LWS_CALLBACK_FILTER_NETWORK_CONNECTION:
 612                 /* if we returned non-zero from here, we kill the connection */
 613                 break;
 614
 615 #ifndef LWS_NO_CLIENT
 616         case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP: {
 617                 char ctype[64], ctlen = 0;
 618                 lwsl_err("LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP\n");
 619                 p = buffer + LWS_PRE;
 620                 end = p + sizeof(buffer) - LWS_PRE;
 621                 if (lws_add_http_header_status(lws_get_parent(wsi), 200, &p, end))
 622                         return 1;
 623                 if (lws_add_http_header_by_token(lws_get_parent(wsi),
 624                                 WSI_TOKEN_HTTP_SERVER,
 625                                 (unsigned char *)"libwebsockets",
 626                                 13, &p, end))
 627                         return 1;
 628
 629                 ctlen = lws_hdr_copy(wsi, ctype, sizeof(ctype), WSI_TOKEN_HTTP_CONTENT_TYPE);
 630                 if (ctlen > 0) {
 631                         if (lws_add_http_header_by_token(lws_get_parent(wsi),
 632                                 WSI_TOKEN_HTTP_CONTENT_TYPE,
 633                                 (unsigned char *)ctype, ctlen, &p, end))
 634                                 return 1;
 635                 }
 636 #if 0
 637                 if (lws_add_http_header_content_length(lws_get_parent(wsi),
 638                                                        file_len, &p, end))
 639                         return 1;
 640 #endif
 641                 if (lws_finalize_http_header(lws_get_parent(wsi), &p, end))
 642                         return 1;
 643
 644                 *p = '\0';
 645                 lwsl_info("%s\n", buffer + LWS_PRE);
 646
 647                 n = lws_write(lws_get_parent(wsi), buffer + LWS_PRE,
 648                               p - (buffer + LWS_PRE),
 649                               LWS_WRITE_HTTP_HEADERS);
 650                 if (n < 0)
 651                         return -1;
 652
 653                 break; }
 654         case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
 655                 //lwsl_err("LWS_CALLBACK_CLOSED_CLIENT_HTTP\n");
 656                 return -1;
 657                 break;
 658         case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
 659                 //lwsl_err("LWS_CALLBACK_RECEIVE_CLIENT_HTTP: wsi %p\n", wsi);
 660                 assert(lws_get_parent(wsi));
 661                 if (!lws_get_parent(wsi))
 662                         break;
 663                 // lwsl_err("LWS_CALLBACK_RECEIVE_CLIENT_HTTP: wsi %p: sock: %d, parent_wsi: %p, parent_sock:%d,  len %d\n",
 664                 //              wsi, lws_get_socket_fd(wsi),
 665                 //              lws_get_parent(wsi),
 666                 //              lws_get_socket_fd(lws_get_parent(wsi)), len);
 667                 pss1 = lws_wsi_user(lws_get_parent(wsi));
 668                 pss1->reason_bf |= 2;
 669                 lws_callback_on_writable(lws_get_parent(wsi));
 670                 break;
 671         case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
 672                 //lwsl_err("LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ len %d\n", len);
 673                 assert(lws_get_parent(wsi));
 674                 m = lws_write(lws_get_parent(wsi), (unsigned char *)in,
 675                                 len, LWS_WRITE_HTTP);
 676                 if (m < 0)
 677                         return -1;
 678                 break;
 679         case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
 680                 //lwsl_err("LWS_CALLBACK_COMPLETED_CLIENT_HTTP\n");
 681                 assert(lws_get_parent(wsi));
 682                 if (!lws_get_parent(wsi))
 683                         break;
 684                 pss1 = lws_wsi_user(lws_get_parent(wsi));
 685                 pss1->client_finished = 1;
 686                 break;
 687 #endif
 688
 689         /*
 690          * callbacks for managing the external poll() array appear in
 691          * protocol 0 callback
 692          */
 693
 694         case LWS_CALLBACK_LOCK_POLL:
 695                 /*
 696                  * lock mutex to protect pollfd state
 697                  * called before any other POLL related callback
 698                  * if protecting wsi lifecycle change, len == 1
 699                  */
 700                 test_server_lock(len);
 701                 break;
 702
 703         case LWS_CALLBACK_UNLOCK_POLL:
 704                 /*
 705                  * unlock mutex to protect pollfd state when
 706                  * called after any other POLL related callback
 707                  * if protecting wsi lifecycle change, len == 1
 708                  */
 709                 test_server_unlock(len);
 710                 break;
 711
 712 #ifdef EXTERNAL_POLL
 713         case LWS_CALLBACK_ADD_POLL_FD:
 714
 715                 if (count_pollfds >= max_poll_elements) {
 716                         lwsl_err("LWS_CALLBACK_ADD_POLL_FD: too many sockets to track\n");
 717                         return 1;
 718                 }
 719
 720                 fd_lookup[pa->fd] = count_pollfds;
 721                 pollfds[count_pollfds].fd = pa->fd;
 722                 pollfds[count_pollfds].events = pa->events;
 723                 pollfds[count_pollfds++].revents = 0;
 724                 break;
 725
 726         case LWS_CALLBACK_DEL_POLL_FD:
 727                 if (!--count_pollfds)
 728                         break;
 729                 m = fd_lookup[pa->fd];
 730                 /* have the last guy take up the vacant slot */
 731                 pollfds[m] = pollfds[count_pollfds];
 732                 fd_lookup[pollfds[count_pollfds].fd] = m;
 733                 break;
 734
 735         case LWS_CALLBACK_CHANGE_MODE_POLL_FD:
 736                 pollfds[fd_lookup[pa->fd]].events = pa->events;
 737                 break;
 738 #endif
 739
 740         case LWS_CALLBACK_GET_THREAD_ID:
 741                 /*
 742                  * if you will call "lws_callback_on_writable"
 743                  * from a different thread, return the caller thread ID
 744                  * here so lws can use this information to work out if it
 745                  * should signal the poll() loop to exit and restart early
 746                  */
 747
 748                 /* return pthread_getthreadid_np(); */
 749
 750                 break;
 751
 752 #if defined(LWS_USE_POLARSSL)
 753 #else
 754 #if defined(LWS_USE_MBEDTLS)
 755 #else
 756 #if defined(LWS_OPENSSL_SUPPORT)
 757         case LWS_CALLBACK_OPENSSL_PERFORM_CLIENT_CERT_VERIFICATION:
 758                 /* Verify the client certificate */
 759                 if (!len || (SSL_get_verify_result((SSL*)in) != X509_V_OK)) {
 760                         int err = X509_STORE_CTX_get_error((X509_STORE_CTX*)user);
 761                         int depth = X509_STORE_CTX_get_error_depth((X509_STORE_CTX*)user);
 762                         const char* msg = X509_verify_cert_error_string(err);
 763                         lwsl_err("LWS_CALLBACK_OPENSSL_PERFORM_CLIENT_CERT_VERIFICATION: SSL error: %s (%d), depth: %d\n", msg, err, depth);
 764                         return 1;
 765                 }
 766                 break;
 767 #if defined(LWS_HAVE_SSL_CTX_set1_param)
 768         case LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS:
 769                 if (crl_path[0]) {
 770                         /* Enable CRL checking */
 771                         X509_VERIFY_PARAM *param = X509_VERIFY_PARAM_new();
 772                         X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
 773                         SSL_CTX_set1_param((SSL_CTX*)user, param);
 774                         X509_STORE *store = SSL_CTX_get_cert_store((SSL_CTX*)user);
 775                         X509_LOOKUP *lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
 776                         n = X509_load_cert_crl_file(lookup, crl_path, X509_FILETYPE_PEM);
 777                         X509_VERIFY_PARAM_free(param);
 778                         if (n != 1) {
 779                                 char errbuf[256];
 780                                 n = ERR_get_error();
 781                                 lwsl_err("LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS: SSL error: %s (%d)\n", ERR_error_string(n, errbuf), n);
 782                                 return 1;
 783                         }
 784                 }
 785                 break;
 786 #endif
 787 #endif
 788 #endif
 789 #endif
 790
 791         default:
 792                 break;
 793         }
 794
 795         return 0;
 796
 797         /* if we're on HTTP1.1 or 2.0, will keep the idle connection alive */
 798 try_to_reuse:
 799         if (lws_http_transaction_completed(wsi))
 800                 return -1;
 801
 802         return 0;
 803 }