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