1 /* 2 * HTTP routines for CUPS. 3 * 4 * Copyright 2007-2015 by Apple Inc. 5 * Copyright 1997-2007 by Easy Software Products, all rights reserved. 6 * 7 * This file contains Kerberos support code, copyright 2006 by 8 * Jelmer Vernooij. 9 * 10 * These coded instructions, statements, and computer programs are the 11 * property of Apple Inc. and are protected by Federal copyright 12 * law. Distribution and use rights are outlined in the file "LICENSE.txt" 13 * which should have been included with this file. If this file is 14 * missing or damaged, see the license at "http://www.cups.org/". 15 * 16 * This file is subject to the Apple OS-Developed Software exception. 17 */ 18 19 /* 20 * Include necessary headers... 21 */ 22 23 #include "cups-private.h" 24 #include <fcntl.h> 25 #include <math.h> 26 #ifdef WIN32 27 # include <tchar.h> 28 #else 29 # include <signal.h> 30 # include <sys/time.h> 31 # include <sys/resource.h> 32 #endif /* WIN32 */ 33 #ifdef HAVE_POLL 34 # include <poll.h> 35 #endif /* HAVE_POLL */ 36 37 38 /* 39 * Local functions... 40 */ 41 42 #ifdef HAVE_LIBZ 43 static void http_content_coding_finish(http_t *http); 44 static void http_content_coding_start(http_t *http, 45 const char *value); 46 #endif /* HAVE_LIBZ */ 47 static http_t *http_create(const char *host, int port, 48 http_addrlist_t *addrlist, int family, 49 http_encryption_t encryption, 50 int blocking, _http_mode_t mode); 51 #ifdef DEBUG 52 static void http_debug_hex(const char *prefix, const char *buffer, 53 int bytes); 54 #endif /* DEBUG */ 55 static ssize_t http_read(http_t *http, char *buffer, size_t length); 56 static ssize_t http_read_buffered(http_t *http, char *buffer, size_t length); 57 static ssize_t http_read_chunk(http_t *http, char *buffer, size_t length); 58 static int http_send(http_t *http, http_state_t request, 59 const char *uri); 60 static ssize_t http_write(http_t *http, const char *buffer, 61 size_t length); 62 static ssize_t http_write_chunk(http_t *http, const char *buffer, 63 size_t length); 64 static off_t http_set_length(http_t *http); 65 static void http_set_timeout(int fd, double timeout); 66 static void http_set_wait(http_t *http); 67 68 #ifdef HAVE_SSL 69 static int http_tls_upgrade(http_t *http); 70 #endif /* HAVE_SSL */ 71 72 73 /* 74 * Local globals... 75 */ 76 77 static const char * const http_fields[] = 78 { 79 "Accept-Language", 80 "Accept-Ranges", 81 "Authorization", 82 "Connection", 83 "Content-Encoding", 84 "Content-Language", 85 "Content-Length", 86 "Content-Location", 87 "Content-MD5", 88 "Content-Range", 89 "Content-Type", 90 "Content-Version", 91 "Date", 92 "Host", 93 "If-Modified-Since", 94 "If-Unmodified-since", 95 "Keep-Alive", 96 "Last-Modified", 97 "Link", 98 "Location", 99 "Range", 100 "Referer", 101 "Retry-After", 102 "Transfer-Encoding", 103 "Upgrade", 104 "User-Agent", 105 "WWW-Authenticate", 106 "Accept-Encoding", 107 "Allow", 108 "Server" 109 }; 110 111 112 /* 113 * 'httpAcceptConnection()' - Accept a new HTTP client connection from the 114 * specified listening socket. 115 * 116 * @since CUPS 1.7/macOS 10.9@ 117 */ 118 119 http_t * /* O - HTTP connection or @code NULL@ */ 120 httpAcceptConnection(int fd, /* I - Listen socket file descriptor */ 121 int blocking) /* I - 1 if the connection should be 122 blocking, 0 otherwise */ 123 { 124 http_t *http; /* HTTP connection */ 125 http_addrlist_t addrlist; /* Dummy address list */ 126 socklen_t addrlen; /* Length of address */ 127 int val; /* Socket option value */ 128 129 130 /* 131 * Range check input... 132 */ 133 134 if (fd < 0) 135 return (NULL); 136 137 /* 138 * Create the client connection... 139 */ 140 141 memset(&addrlist, 0, sizeof(addrlist)); 142 143 if ((http = http_create(NULL, 0, &addrlist, AF_UNSPEC, 144 HTTP_ENCRYPTION_IF_REQUESTED, blocking, 145 _HTTP_MODE_SERVER)) == NULL) 146 return (NULL); 147 148 /* 149 * Accept the client and get the remote address... 150 */ 151 152 addrlen = sizeof(http_addr_t); 153 154 if ((http->fd = accept(fd, (struct sockaddr *)&(http->addrlist->addr), 155 &addrlen)) < 0) 156 { 157 _cupsSetHTTPError(HTTP_STATUS_ERROR); 158 httpClose(http); 159 160 return (NULL); 161 } 162 163 http->hostaddr = &(http->addrlist->addr); 164 165 if (httpAddrLocalhost(http->hostaddr)) 166 strlcpy(http->hostname, "localhost", sizeof(http->hostname)); 167 else 168 httpAddrString(http->hostaddr, http->hostname, sizeof(http->hostname)); 169 170 #ifdef SO_NOSIGPIPE 171 /* 172 * Disable SIGPIPE for this socket. 173 */ 174 175 val = 1; 176 setsockopt(http->fd, SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val)); 177 #endif /* SO_NOSIGPIPE */ 178 179 /* 180 * Using TCP_NODELAY improves responsiveness, especially on systems 181 * with a slow loopback interface. Since we write large buffers 182 * when sending print files and requests, there shouldn't be any 183 * performance penalty for this... 184 */ 185 186 val = 1; 187 setsockopt(http->fd, IPPROTO_TCP, TCP_NODELAY, CUPS_SOCAST &val, sizeof(val)); 188 189 #ifdef FD_CLOEXEC 190 /* 191 * Close this socket when starting another process... 192 */ 193 194 fcntl(http->fd, F_SETFD, FD_CLOEXEC); 195 #endif /* FD_CLOEXEC */ 196 197 return (http); 198 } 199 200 201 /* 202 * 'httpAddCredential()' - Allocates and adds a single credential to an array. 203 * 204 * Use @code cupsArrayNew(NULL, NULL)@ to create a credentials array. 205 * 206 * @since CUPS 1.5/macOS 10.7@ 207 */ 208 209 int /* O - 0 on success, -1 on error */ 210 httpAddCredential( 211 cups_array_t *credentials, /* I - Credentials array */ 212 const void *data, /* I - PEM-encoded X.509 data */ 213 size_t datalen) /* I - Length of data */ 214 { 215 http_credential_t *credential; /* Credential data */ 216 217 218 if ((credential = malloc(sizeof(http_credential_t))) != NULL) 219 { 220 credential->datalen = datalen; 221 222 if ((credential->data = malloc(datalen)) != NULL) 223 { 224 memcpy(credential->data, data, datalen); 225 cupsArrayAdd(credentials, credential); 226 return (0); 227 } 228 229 free(credential); 230 } 231 232 return (-1); 233 } 234 235 236 /* 237 * 'httpBlocking()' - Set blocking/non-blocking behavior on a connection. 238 */ 239 240 void 241 httpBlocking(http_t *http, /* I - HTTP connection */ 242 int b) /* I - 1 = blocking, 0 = non-blocking */ 243 { 244 if (http) 245 { 246 http->blocking = b; 247 http_set_wait(http); 248 } 249 } 250 251 252 /* 253 * 'httpCheck()' - Check to see if there is a pending response from the server. 254 */ 255 256 int /* O - 0 = no data, 1 = data available */ 257 httpCheck(http_t *http) /* I - HTTP connection */ 258 { 259 return (httpWait(http, 0)); 260 } 261 262 263 /* 264 * 'httpClearCookie()' - Clear the cookie value(s). 265 * 266 * @since CUPS 1.1.19/macOS 10.3@ 267 */ 268 269 void 270 httpClearCookie(http_t *http) /* I - HTTP connection */ 271 { 272 if (!http) 273 return; 274 275 if (http->cookie) 276 { 277 free(http->cookie); 278 http->cookie = NULL; 279 } 280 } 281 282 283 /* 284 * 'httpClearFields()' - Clear HTTP request fields. 285 */ 286 287 void 288 httpClearFields(http_t *http) /* I - HTTP connection */ 289 { 290 DEBUG_printf(("httpClearFields(http=%p)", (void *)http)); 291 292 if (http) 293 { 294 memset(http->fields, 0, sizeof(http->fields)); 295 296 if (http->mode == _HTTP_MODE_CLIENT) 297 { 298 if (http->hostname[0] == '/') 299 httpSetField(http, HTTP_FIELD_HOST, "localhost"); 300 else 301 httpSetField(http, HTTP_FIELD_HOST, http->hostname); 302 } 303 304 if (http->field_authorization) 305 { 306 free(http->field_authorization); 307 http->field_authorization = NULL; 308 } 309 310 if (http->accept_encoding) 311 { 312 _cupsStrFree(http->accept_encoding); 313 http->accept_encoding = NULL; 314 } 315 316 if (http->allow) 317 { 318 _cupsStrFree(http->allow); 319 http->allow = NULL; 320 } 321 322 if (http->server) 323 { 324 _cupsStrFree(http->server); 325 http->server = NULL; 326 } 327 328 http->expect = (http_status_t)0; 329 } 330 } 331 332 333 /* 334 * 'httpClose()' - Close an HTTP connection. 335 */ 336 337 void 338 httpClose(http_t *http) /* I - HTTP connection */ 339 { 340 #ifdef HAVE_GSSAPI 341 OM_uint32 minor_status; /* Minor status code */ 342 #endif /* HAVE_GSSAPI */ 343 344 345 DEBUG_printf(("httpClose(http=%p)", (void *)http)); 346 347 /* 348 * Range check input... 349 */ 350 351 if (!http) 352 return; 353 354 /* 355 * Close any open connection... 356 */ 357 358 _httpDisconnect(http); 359 360 /* 361 * Free memory used... 362 */ 363 364 httpAddrFreeList(http->addrlist); 365 366 if (http->cookie) 367 free(http->cookie); 368 369 #ifdef HAVE_GSSAPI 370 if (http->gssctx != GSS_C_NO_CONTEXT) 371 gss_delete_sec_context(&minor_status, &http->gssctx, GSS_C_NO_BUFFER); 372 373 if (http->gssname != GSS_C_NO_NAME) 374 gss_release_name(&minor_status, &http->gssname); 375 #endif /* HAVE_GSSAPI */ 376 377 #ifdef HAVE_AUTHORIZATION_H 378 if (http->auth_ref) 379 AuthorizationFree(http->auth_ref, kAuthorizationFlagDefaults); 380 #endif /* HAVE_AUTHORIZATION_H */ 381 382 httpClearFields(http); 383 384 if (http->authstring && http->authstring != http->_authstring) 385 free(http->authstring); 386 387 free(http); 388 } 389 390 391 /* 392 * 'httpCompareCredentials()' - Compare two sets of X.509 credentials. 393 * 394 * @since CUPS 2.0/OS 10.10@ 395 */ 396 397 int /* O - 1 if they match, 0 if they do not */ 398 httpCompareCredentials( 399 cups_array_t *cred1, /* I - First set of X.509 credentials */ 400 cups_array_t *cred2) /* I - Second set of X.509 credentials */ 401 { 402 http_credential_t *temp1, *temp2; /* Temporary credentials */ 403 404 405 for (temp1 = (http_credential_t *)cupsArrayFirst(cred1), temp2 = (http_credential_t *)cupsArrayFirst(cred2); temp1 && temp2; temp1 = (http_credential_t *)cupsArrayNext(cred1), temp2 = (http_credential_t *)cupsArrayNext(cred2)) 406 if (temp1->datalen != temp2->datalen) 407 return (0); 408 else if (memcmp(temp1->data, temp2->data, temp1->datalen)) 409 return (0); 410 411 return (temp1 == temp2); 412 } 413 414 415 /* 416 * 'httpConnect()' - Connect to a HTTP server. 417 * 418 * This function is deprecated - use @link httpConnect2@ instead. 419 * 420 * @deprecated@ 421 */ 422 423 http_t * /* O - New HTTP connection */ 424 httpConnect(const char *host, /* I - Host to connect to */ 425 int port) /* I - Port number */ 426 { 427 return (httpConnect2(host, port, NULL, AF_UNSPEC, 428 HTTP_ENCRYPTION_IF_REQUESTED, 1, 30000, NULL)); 429 } 430 431 432 /* 433 * 'httpConnect2()' - Connect to a HTTP server. 434 * 435 * @since CUPS 1.7/macOS 10.9@ 436 */ 437 438 http_t * /* O - New HTTP connection */ 439 httpConnect2( 440 const char *host, /* I - Host to connect to */ 441 int port, /* I - Port number */ 442 http_addrlist_t *addrlist, /* I - List of addresses or NULL to lookup */ 443 int family, /* I - Address family to use or @code AF_UNSPEC@ for any */ 444 http_encryption_t encryption, /* I - Type of encryption to use */ 445 int blocking, /* I - 1 for blocking connection, 0 for non-blocking */ 446 int msec, /* I - Connection timeout in milliseconds, 0 means don't connect */ 447 int *cancel) /* I - Pointer to "cancel" variable */ 448 { 449 http_t *http; /* New HTTP connection */ 450 451 452 DEBUG_printf(("httpConnect2(host=\"%s\", port=%d, addrlist=%p, family=%d, encryption=%d, blocking=%d, msec=%d, cancel=%p)", host, port, (void *)addrlist, family, encryption, blocking, msec, (void *)cancel)); 453 454 /* 455 * Create the HTTP structure... 456 */ 457 458 if ((http = http_create(host, port, addrlist, family, encryption, blocking, 459 _HTTP_MODE_CLIENT)) == NULL) 460 return (NULL); 461 462 /* 463 * Optionally connect to the remote system... 464 */ 465 466 if (msec == 0 || !httpReconnect2(http, msec, cancel)) 467 return (http); 468 469 /* 470 * Could not connect to any known address - bail out! 471 */ 472 473 httpClose(http); 474 475 return (NULL); 476 } 477 478 479 /* 480 * 'httpConnectEncrypt()' - Connect to a HTTP server using encryption. 481 * 482 * This function is now deprecated. Please use the @link httpConnect2@ function 483 * instead. 484 * 485 * @deprecated@ 486 */ 487 488 http_t * /* O - New HTTP connection */ 489 httpConnectEncrypt( 490 const char *host, /* I - Host to connect to */ 491 int port, /* I - Port number */ 492 http_encryption_t encryption) /* I - Type of encryption to use */ 493 { 494 DEBUG_printf(("httpConnectEncrypt(host=\"%s\", port=%d, encryption=%d)", 495 host, port, encryption)); 496 497 return (httpConnect2(host, port, NULL, AF_UNSPEC, encryption, 1, 30000, 498 NULL)); 499 } 500 501 502 /* 503 * 'httpDelete()' - Send a DELETE request to the server. 504 */ 505 506 int /* O - Status of call (0 = success) */ 507 httpDelete(http_t *http, /* I - HTTP connection */ 508 const char *uri) /* I - URI to delete */ 509 { 510 return (http_send(http, HTTP_STATE_DELETE, uri)); 511 } 512 513 514 /* 515 * '_httpDisconnect()' - Disconnect a HTTP connection. 516 */ 517 518 void 519 _httpDisconnect(http_t *http) /* I - HTTP connection */ 520 { 521 #ifdef HAVE_SSL 522 if (http->tls) 523 _httpTLSStop(http); 524 #endif /* HAVE_SSL */ 525 526 httpAddrClose(NULL, http->fd); 527 528 http->fd = -1; 529 } 530 531 532 /* 533 * 'httpEncryption()' - Set the required encryption on the link. 534 */ 535 536 int /* O - -1 on error, 0 on success */ 537 httpEncryption(http_t *http, /* I - HTTP connection */ 538 http_encryption_t e) /* I - New encryption preference */ 539 { 540 DEBUG_printf(("httpEncryption(http=%p, e=%d)", (void *)http, e)); 541 542 #ifdef HAVE_SSL 543 if (!http) 544 return (0); 545 546 if (http->mode == _HTTP_MODE_CLIENT) 547 { 548 http->encryption = e; 549 550 if ((http->encryption == HTTP_ENCRYPTION_ALWAYS && !http->tls) || 551 (http->encryption == HTTP_ENCRYPTION_NEVER && http->tls)) 552 return (httpReconnect2(http, 30000, NULL)); 553 else if (http->encryption == HTTP_ENCRYPTION_REQUIRED && !http->tls) 554 return (http_tls_upgrade(http)); 555 else 556 return (0); 557 } 558 else 559 { 560 if (e == HTTP_ENCRYPTION_NEVER && http->tls) 561 return (-1); 562 563 http->encryption = e; 564 if (e != HTTP_ENCRYPTION_IF_REQUESTED && !http->tls) 565 return (_httpTLSStart(http)); 566 else 567 return (0); 568 } 569 #else 570 if (e == HTTP_ENCRYPTION_ALWAYS || e == HTTP_ENCRYPTION_REQUIRED) 571 return (-1); 572 else 573 return (0); 574 #endif /* HAVE_SSL */ 575 } 576 577 578 /* 579 * 'httpError()' - Get the last error on a connection. 580 */ 581 582 int /* O - Error code (errno) value */ 583 httpError(http_t *http) /* I - HTTP connection */ 584 { 585 if (http) 586 return (http->error); 587 else 588 return (EINVAL); 589 } 590 591 592 /* 593 * 'httpFieldValue()' - Return the HTTP field enumeration value for a field 594 * name. 595 */ 596 597 http_field_t /* O - Field index */ 598 httpFieldValue(const char *name) /* I - String name */ 599 { 600 int i; /* Looping var */ 601 602 603 for (i = 0; i < HTTP_FIELD_MAX; i ++) 604 if (!_cups_strcasecmp(name, http_fields[i])) 605 return ((http_field_t)i); 606 607 return (HTTP_FIELD_UNKNOWN); 608 } 609 610 611 /* 612 * 'httpFlush()' - Flush data from a HTTP connection. 613 */ 614 615 void 616 httpFlush(http_t *http) /* I - HTTP connection */ 617 { 618 char buffer[8192]; /* Junk buffer */ 619 int blocking; /* To block or not to block */ 620 http_state_t oldstate; /* Old state */ 621 622 623 DEBUG_printf(("httpFlush(http=%p), state=%s", (void *)http, httpStateString(http->state))); 624 625 /* 626 * Nothing to do if we are in the "waiting" state... 627 */ 628 629 if (http->state == HTTP_STATE_WAITING) 630 return; 631 632 /* 633 * Temporarily set non-blocking mode so we don't get stuck in httpRead()... 634 */ 635 636 blocking = http->blocking; 637 http->blocking = 0; 638 639 /* 640 * Read any data we can... 641 */ 642 643 oldstate = http->state; 644 while (httpRead2(http, buffer, sizeof(buffer)) > 0); 645 646 /* 647 * Restore blocking and reset the connection if we didn't get all of 648 * the remaining data... 649 */ 650 651 http->blocking = blocking; 652 653 if (http->state == oldstate && http->state != HTTP_STATE_WAITING && 654 http->fd >= 0) 655 { 656 /* 657 * Didn't get the data back, so close the current connection. 658 */ 659 660 #ifdef HAVE_LIBZ 661 if (http->coding) 662 http_content_coding_finish(http); 663 #endif /* HAVE_LIBZ */ 664 665 DEBUG_puts("1httpFlush: Setting state to HTTP_STATE_WAITING and closing."); 666 667 http->state = HTTP_STATE_WAITING; 668 669 #ifdef HAVE_SSL 670 if (http->tls) 671 _httpTLSStop(http); 672 #endif /* HAVE_SSL */ 673 674 httpAddrClose(NULL, http->fd); 675 676 http->fd = -1; 677 } 678 } 679 680 681 /* 682 * 'httpFlushWrite()' - Flush data in write buffer. 683 * 684 * @since CUPS 1.2/macOS 10.5@ 685 */ 686 687 int /* O - Bytes written or -1 on error */ 688 httpFlushWrite(http_t *http) /* I - HTTP connection */ 689 { 690 ssize_t bytes; /* Bytes written */ 691 692 693 DEBUG_printf(("httpFlushWrite(http=%p) data_encoding=%d", (void *)http, http ? http->data_encoding : 100)); 694 695 if (!http || !http->wused) 696 { 697 DEBUG_puts(http ? "1httpFlushWrite: Write buffer is empty." : 698 "1httpFlushWrite: No connection."); 699 return (0); 700 } 701 702 if (http->data_encoding == HTTP_ENCODING_CHUNKED) 703 bytes = http_write_chunk(http, http->wbuffer, (size_t)http->wused); 704 else 705 bytes = http_write(http, http->wbuffer, (size_t)http->wused); 706 707 http->wused = 0; 708 709 DEBUG_printf(("1httpFlushWrite: Returning %d, errno=%d.", (int)bytes, errno)); 710 711 return ((int)bytes); 712 } 713 714 715 /* 716 * 'httpFreeCredentials()' - Free an array of credentials. 717 */ 718 719 void 720 httpFreeCredentials( 721 cups_array_t *credentials) /* I - Array of credentials */ 722 { 723 http_credential_t *credential; /* Credential */ 724 725 726 for (credential = (http_credential_t *)cupsArrayFirst(credentials); 727 credential; 728 credential = (http_credential_t *)cupsArrayNext(credentials)) 729 { 730 cupsArrayRemove(credentials, credential); 731 free((void *)credential->data); 732 free(credential); 733 } 734 735 cupsArrayDelete(credentials); 736 } 737 738 739 /* 740 * 'httpGet()' - Send a GET request to the server. 741 */ 742 743 int /* O - Status of call (0 = success) */ 744 httpGet(http_t *http, /* I - HTTP connection */ 745 const char *uri) /* I - URI to get */ 746 { 747 return (http_send(http, HTTP_STATE_GET, uri)); 748 } 749 750 751 /* 752 * 'httpGetActivity()' - Get the most recent activity for a connection. 753 * 754 * The return value is the UNIX time of the last read or write. 755 * 756 * @since CUPS 2.0/OS 10.10@ 757 */ 758 759 time_t /* O - Time of last read or write */ 760 httpGetActivity(http_t *http) /* I - HTTP connection */ 761 { 762 return (http ? http->activity : 0); 763 } 764 765 766 /* 767 * 'httpGetAuthString()' - Get the current authorization string. 768 * 769 * The authorization string is set by cupsDoAuthentication() and 770 * httpSetAuthString(). Use httpGetAuthString() to retrieve the 771 * string to use with httpSetField() for the HTTP_FIELD_AUTHORIZATION 772 * value. 773 * 774 * @since CUPS 1.3/macOS 10.5@ 775 */ 776 777 char * /* O - Authorization string */ 778 httpGetAuthString(http_t *http) /* I - HTTP connection */ 779 { 780 if (http) 781 return (http->authstring); 782 else 783 return (NULL); 784 } 785 786 787 /* 788 * 'httpGetBlocking()' - Get the blocking/non-block state of a connection. 789 * 790 * @since CUPS 1.2/macOS 10.5@ 791 */ 792 793 int /* O - 1 if blocking, 0 if non-blocking */ 794 httpGetBlocking(http_t *http) /* I - HTTP connection */ 795 { 796 return (http ? http->blocking : 0); 797 } 798 799 800 /* 801 * 'httpGetContentEncoding()' - Get a common content encoding, if any, between 802 * the client and server. 803 * 804 * This function uses the value of the Accepts-Encoding HTTP header and must be 805 * called after receiving a response from the server or a request from the 806 * client. The value returned can be use in subsequent requests (for clients) 807 * or in the response (for servers) in order to compress the content stream. 808 * 809 * @since CUPS 1.7/macOS 10.9@ 810 */ 811 812 const char * /* O - Content-Coding value or 813 @code NULL@ for the identity 814 coding. */ 815 httpGetContentEncoding(http_t *http) /* I - HTTP connection */ 816 { 817 #ifdef HAVE_LIBZ 818 if (http && http->accept_encoding) 819 { 820 int i; /* Looping var */ 821 char temp[HTTP_MAX_VALUE], /* Copy of Accepts-Encoding value */ 822 *start, /* Start of coding value */ 823 *end; /* End of coding value */ 824 double qvalue; /* "qvalue" for coding */ 825 struct lconv *loc = localeconv(); /* Locale data */ 826 static const char * const codings[] = 827 { /* Supported content codings */ 828 "deflate", 829 "gzip", 830 "x-deflate", 831 "x-gzip" 832 }; 833 834 strlcpy(temp, http->accept_encoding, sizeof(temp)); 835 836 for (start = temp; *start; start = end) 837 { 838 /* 839 * Find the end of the coding name... 840 */ 841 842 qvalue = 1.0; 843 end = start; 844 while (*end && *end != ';' && *end != ',' && !isspace(*end & 255)) 845 end ++; 846 847 if (*end == ';') 848 { 849 /* 850 * Grab the qvalue as needed... 851 */ 852 853 if (!strncmp(end, ";q=", 3)) 854 qvalue = _cupsStrScand(end + 3, NULL, loc); 855 856 /* 857 * Skip past all attributes... 858 */ 859 860 *end++ = '\0'; 861 while (*end && *end != ',' && !isspace(*end & 255)) 862 end ++; 863 } 864 else if (*end) 865 *end++ = '\0'; 866 867 while (*end && isspace(*end & 255)) 868 end ++; 869 870 /* 871 * Check value if it matches something we support... 872 */ 873 874 if (qvalue <= 0.0) 875 continue; 876 877 for (i = 0; i < (int)(sizeof(codings) / sizeof(codings[0])); i ++) 878 if (!strcmp(start, codings[i])) 879 return (codings[i]); 880 } 881 } 882 #endif /* HAVE_LIBZ */ 883 884 return (NULL); 885 } 886 887 888 /* 889 * 'httpGetCookie()' - Get any cookie data from the response. 890 * 891 * @since CUPS 1.1.19/macOS 10.3@ 892 */ 893 894 const char * /* O - Cookie data or NULL */ 895 httpGetCookie(http_t *http) /* I - HTTP connection */ 896 { 897 return (http ? http->cookie : NULL); 898 } 899 900 901 /* 902 * 'httpGetEncryption()' - Get the current encryption mode of a connection. 903 * 904 * This function returns the encryption mode for the connection. Use the 905 * @link httpIsEncrypted@ function to determine whether a TLS session has 906 * been established. 907 * 908 * @since CUPS 2.0/OS 10.10@ 909 */ 910 911 http_encryption_t /* O - Current encryption mode */ 912 httpGetEncryption(http_t *http) /* I - HTTP connection */ 913 { 914 return (http ? http->encryption : HTTP_ENCRYPTION_IF_REQUESTED); 915 } 916 917 918 /* 919 * 'httpGetExpect()' - Get the value of the Expect header, if any. 920 * 921 * Returns @code HTTP_STATUS_NONE@ if there is no Expect header, otherwise 922 * returns the expected HTTP status code, typically @code HTTP_STATUS_CONTINUE@. 923 * 924 * @since CUPS 1.7/macOS 10.9@ 925 */ 926 927 http_status_t /* O - Expect: status, if any */ 928 httpGetExpect(http_t *http) /* I - HTTP connection */ 929 { 930 if (!http) 931 return (HTTP_STATUS_ERROR); 932 else 933 return (http->expect); 934 } 935 936 937 /* 938 * 'httpGetFd()' - Get the file descriptor associated with a connection. 939 * 940 * @since CUPS 1.2/macOS 10.5@ 941 */ 942 943 int /* O - File descriptor or -1 if none */ 944 httpGetFd(http_t *http) /* I - HTTP connection */ 945 { 946 return (http ? http->fd : -1); 947 } 948 949 950 /* 951 * 'httpGetField()' - Get a field value from a request/response. 952 */ 953 954 const char * /* O - Field value */ 955 httpGetField(http_t *http, /* I - HTTP connection */ 956 http_field_t field) /* I - Field to get */ 957 { 958 if (!http || field <= HTTP_FIELD_UNKNOWN || field >= HTTP_FIELD_MAX) 959 return (NULL); 960 961 switch (field) 962 { 963 case HTTP_FIELD_ACCEPT_ENCODING : 964 return (http->accept_encoding); 965 966 case HTTP_FIELD_ALLOW : 967 return (http->allow); 968 969 case HTTP_FIELD_SERVER : 970 return (http->server); 971 972 case HTTP_FIELD_AUTHORIZATION : 973 if (http->field_authorization) 974 { 975 /* 976 * Special case for WWW-Authenticate: as its contents can be 977 * longer than HTTP_MAX_VALUE... 978 */ 979 980 return (http->field_authorization); 981 } 982 983 default : 984 return (http->fields[field]); 985 } 986 } 987 988 989 /* 990 * 'httpGetKeepAlive()' - Get the current Keep-Alive state of the connection. 991 * 992 * @since CUPS 2.0/OS 10.10@ 993 */ 994 995 http_keepalive_t /* O - Keep-Alive state */ 996 httpGetKeepAlive(http_t *http) /* I - HTTP connection */ 997 { 998 return (http ? http->keep_alive : HTTP_KEEPALIVE_OFF); 999 } 1000 1001 1002 /* 1003 * 'httpGetLength()' - Get the amount of data remaining from the 1004 * content-length or transfer-encoding fields. 1005 * 1006 * This function is deprecated and will not return lengths larger than 1007 * 2^31 - 1; use httpGetLength2() instead. 1008 * 1009 * @deprecated@ 1010 */ 1011 1012 int /* O - Content length */ 1013 httpGetLength(http_t *http) /* I - HTTP connection */ 1014 { 1015 /* 1016 * Get the read content length and return the 32-bit value. 1017 */ 1018 1019 if (http) 1020 { 1021 httpGetLength2(http); 1022 1023 return (http->_data_remaining); 1024 } 1025 else 1026 return (-1); 1027 } 1028 1029 1030 /* 1031 * 'httpGetLength2()' - Get the amount of data remaining from the 1032 * content-length or transfer-encoding fields. 1033 * 1034 * This function returns the complete content length, even for 1035 * content larger than 2^31 - 1. 1036 * 1037 * @since CUPS 1.2/macOS 10.5@ 1038 */ 1039 1040 off_t /* O - Content length */ 1041 httpGetLength2(http_t *http) /* I - HTTP connection */ 1042 { 1043 off_t remaining; /* Remaining length */ 1044 1045 1046 DEBUG_printf(("2httpGetLength2(http=%p), state=%s", (void *)http, httpStateString(http->state))); 1047 1048 if (!http) 1049 return (-1); 1050 1051 if (!_cups_strcasecmp(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked")) 1052 { 1053 DEBUG_puts("4httpGetLength2: chunked request!"); 1054 remaining = 0; 1055 } 1056 else 1057 { 1058 /* 1059 * The following is a hack for HTTP servers that don't send a 1060 * Content-Length or Transfer-Encoding field... 1061 * 1062 * If there is no Content-Length then the connection must close 1063 * after the transfer is complete... 1064 */ 1065 1066 if (!http->fields[HTTP_FIELD_CONTENT_LENGTH][0]) 1067 { 1068 /* 1069 * Default content length is 0 for errors and certain types of operations, 1070 * and 2^31-1 for other successful requests... 1071 */ 1072 1073 if (http->status >= HTTP_STATUS_MULTIPLE_CHOICES || 1074 http->state == HTTP_STATE_OPTIONS || 1075 (http->state == HTTP_STATE_GET && http->mode == _HTTP_MODE_SERVER) || 1076 http->state == HTTP_STATE_HEAD || 1077 (http->state == HTTP_STATE_PUT && http->mode == _HTTP_MODE_CLIENT) || 1078 http->state == HTTP_STATE_DELETE || 1079 http->state == HTTP_STATE_TRACE || 1080 http->state == HTTP_STATE_CONNECT) 1081 remaining = 0; 1082 else 1083 remaining = 2147483647; 1084 } 1085 else if ((remaining = strtoll(http->fields[HTTP_FIELD_CONTENT_LENGTH], 1086 NULL, 10)) < 0) 1087 remaining = -1; 1088 1089 DEBUG_printf(("4httpGetLength2: content_length=" CUPS_LLFMT, 1090 CUPS_LLCAST remaining)); 1091 } 1092 1093 return (remaining); 1094 } 1095 1096 1097 /* 1098 * 'httpGetPending()' - Get the number of bytes that are buffered for writing. 1099 * 1100 * @since CUPS 2.0/OS 10.10@ 1101 */ 1102 1103 size_t /* O - Number of bytes buffered */ 1104 httpGetPending(http_t *http) /* I - HTTP connection */ 1105 { 1106 return (http ? (size_t)http->wused : 0); 1107 } 1108 1109 1110 /* 1111 * 'httpGetReady()' - Get the number of bytes that can be read without blocking. 1112 * 1113 * @since CUPS 2.0/OS 10.10@ 1114 */ 1115 1116 size_t /* O - Number of bytes available */ 1117 httpGetReady(http_t *http) /* I - HTTP connection */ 1118 { 1119 if (!http) 1120 return (0); 1121 else if (http->used > 0) 1122 return ((size_t)http->used); 1123 #ifdef HAVE_SSL 1124 else if (http->tls) 1125 return (_httpTLSPending(http)); 1126 #endif /* HAVE_SSL */ 1127 1128 return (0); 1129 } 1130 1131 1132 /* 1133 * 'httpGetRemaining()' - Get the number of remaining bytes in the message 1134 * body or current chunk. 1135 * 1136 * The @link httpIsChunked@ function can be used to determine whether the 1137 * message body is chunked or fixed-length. 1138 * 1139 * @since CUPS 2.0/OS 10.10@ 1140 */ 1141 1142 size_t /* O - Remaining bytes */ 1143 httpGetRemaining(http_t *http) /* I - HTTP connection */ 1144 { 1145 return (http ? (size_t)http->data_remaining : 0); 1146 } 1147 1148 1149 /* 1150 * 'httpGets()' - Get a line of text from a HTTP connection. 1151 */ 1152 1153 char * /* O - Line or NULL */ 1154 httpGets(char *line, /* I - Line to read into */ 1155 int length, /* I - Max length of buffer */ 1156 http_t *http) /* I - HTTP connection */ 1157 { 1158 char *lineptr, /* Pointer into line */ 1159 *lineend, /* End of line */ 1160 *bufptr, /* Pointer into input buffer */ 1161 *bufend; /* Pointer to end of buffer */ 1162 ssize_t bytes; /* Number of bytes read */ 1163 int eol; /* End-of-line? */ 1164 1165 1166 DEBUG_printf(("2httpGets(line=%p, length=%d, http=%p)", (void *)line, length, (void *)http)); 1167 1168 if (!http || !line || length <= 1) 1169 return (NULL); 1170 1171 /* 1172 * Read a line from the buffer... 1173 */ 1174 1175 http->error = 0; 1176 lineptr = line; 1177 lineend = line + length - 1; 1178 eol = 0; 1179 1180 while (lineptr < lineend) 1181 { 1182 /* 1183 * Pre-load the buffer as needed... 1184 */ 1185 1186 #ifdef WIN32 1187 WSASetLastError(0); 1188 #else 1189 errno = 0; 1190 #endif /* WIN32 */ 1191 1192 while (http->used == 0) 1193 { 1194 /* 1195 * No newline; see if there is more data to be read... 1196 */ 1197 1198 while (!_httpWait(http, http->wait_value, 1)) 1199 { 1200 if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) 1201 continue; 1202 1203 DEBUG_puts("3httpGets: Timed out!"); 1204 #ifdef WIN32 1205 http->error = WSAETIMEDOUT; 1206 #else 1207 http->error = ETIMEDOUT; 1208 #endif /* WIN32 */ 1209 return (NULL); 1210 } 1211 1212 bytes = http_read(http, http->buffer + http->used, (size_t)(HTTP_MAX_BUFFER - http->used)); 1213 1214 DEBUG_printf(("4httpGets: read " CUPS_LLFMT " bytes.", CUPS_LLCAST bytes)); 1215 1216 if (bytes < 0) 1217 { 1218 /* 1219 * Nope, can't get a line this time... 1220 */ 1221 1222 #ifdef WIN32 1223 DEBUG_printf(("3httpGets: recv() error %d!", WSAGetLastError())); 1224 1225 if (WSAGetLastError() == WSAEINTR) 1226 continue; 1227 else if (WSAGetLastError() == WSAEWOULDBLOCK) 1228 { 1229 if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) 1230 continue; 1231 1232 http->error = WSAGetLastError(); 1233 } 1234 else if (WSAGetLastError() != http->error) 1235 { 1236 http->error = WSAGetLastError(); 1237 continue; 1238 } 1239 1240 #else 1241 DEBUG_printf(("3httpGets: recv() error %d!", errno)); 1242 1243 if (errno == EINTR) 1244 continue; 1245 else if (errno == EWOULDBLOCK || errno == EAGAIN) 1246 { 1247 if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) 1248 continue; 1249 else if (!http->timeout_cb && errno == EAGAIN) 1250 continue; 1251 1252 http->error = errno; 1253 } 1254 else if (errno != http->error) 1255 { 1256 http->error = errno; 1257 continue; 1258 } 1259 #endif /* WIN32 */ 1260 1261 return (NULL); 1262 } 1263 else if (bytes == 0) 1264 { 1265 http->error = EPIPE; 1266 1267 return (NULL); 1268 } 1269 1270 /* 1271 * Yup, update the amount used... 1272 */ 1273 1274 http->used += (int)bytes; 1275 } 1276 1277 /* 1278 * Now copy as much of the current line as possible... 1279 */ 1280 1281 for (bufptr = http->buffer, bufend = http->buffer + http->used; 1282 lineptr < lineend && bufptr < bufend;) 1283 { 1284 if (*bufptr == 0x0a) 1285 { 1286 eol = 1; 1287 bufptr ++; 1288 break; 1289 } 1290 else if (*bufptr == 0x0d) 1291 bufptr ++; 1292 else 1293 *lineptr++ = *bufptr++; 1294 } 1295 1296 http->used -= (int)(bufptr - http->buffer); 1297 if (http->used > 0) 1298 memmove(http->buffer, bufptr, (size_t)http->used); 1299 1300 if (eol) 1301 { 1302 /* 1303 * End of line... 1304 */ 1305 1306 http->activity = time(NULL); 1307 1308 *lineptr = '\0'; 1309 1310 DEBUG_printf(("3httpGets: Returning \"%s\"", line)); 1311 1312 return (line); 1313 } 1314 } 1315 1316 DEBUG_puts("3httpGets: No new line available!"); 1317 1318 return (NULL); 1319 } 1320 1321 1322 /* 1323 * 'httpGetState()' - Get the current state of the HTTP request. 1324 */ 1325 1326 http_state_t /* O - HTTP state */ 1327 httpGetState(http_t *http) /* I - HTTP connection */ 1328 { 1329 return (http ? http->state : HTTP_STATE_ERROR); 1330 } 1331 1332 1333 /* 1334 * 'httpGetStatus()' - Get the status of the last HTTP request. 1335 * 1336 * @since CUPS 1.2/macOS 10.5@ 1337 */ 1338 1339 http_status_t /* O - HTTP status */ 1340 httpGetStatus(http_t *http) /* I - HTTP connection */ 1341 { 1342 return (http ? http->status : HTTP_STATUS_ERROR); 1343 } 1344 1345 1346 /* 1347 * 'httpGetSubField()' - Get a sub-field value. 1348 * 1349 * @deprecated@ 1350 */ 1351 1352 char * /* O - Value or NULL */ 1353 httpGetSubField(http_t *http, /* I - HTTP connection */ 1354 http_field_t field, /* I - Field index */ 1355 const char *name, /* I - Name of sub-field */ 1356 char *value) /* O - Value string */ 1357 { 1358 return (httpGetSubField2(http, field, name, value, HTTP_MAX_VALUE)); 1359 } 1360 1361 1362 /* 1363 * 'httpGetSubField2()' - Get a sub-field value. 1364 * 1365 * @since CUPS 1.2/macOS 10.5@ 1366 */ 1367 1368 char * /* O - Value or NULL */ 1369 httpGetSubField2(http_t *http, /* I - HTTP connection */ 1370 http_field_t field, /* I - Field index */ 1371 const char *name, /* I - Name of sub-field */ 1372 char *value, /* O - Value string */ 1373 int valuelen) /* I - Size of value buffer */ 1374 { 1375 const char *fptr; /* Pointer into field */ 1376 char temp[HTTP_MAX_VALUE], /* Temporary buffer for name */ 1377 *ptr, /* Pointer into string buffer */ 1378 *end; /* End of value buffer */ 1379 1380 DEBUG_printf(("2httpGetSubField2(http=%p, field=%d, name=\"%s\", value=%p, valuelen=%d)", (void *)http, field, name, (void *)value, valuelen)); 1381 1382 if (!http || !name || !value || valuelen < 2 || 1383 field <= HTTP_FIELD_UNKNOWN || field >= HTTP_FIELD_MAX) 1384 return (NULL); 1385 1386 end = value + valuelen - 1; 1387 1388 for (fptr = http->fields[field]; *fptr;) 1389 { 1390 /* 1391 * Skip leading whitespace... 1392 */ 1393 1394 while (_cups_isspace(*fptr)) 1395 fptr ++; 1396 1397 if (*fptr == ',') 1398 { 1399 fptr ++; 1400 continue; 1401 } 1402 1403 /* 1404 * Get the sub-field name... 1405 */ 1406 1407 for (ptr = temp; 1408 *fptr && *fptr != '=' && !_cups_isspace(*fptr) && 1409 ptr < (temp + sizeof(temp) - 1); 1410 *ptr++ = *fptr++); 1411 1412 *ptr = '\0'; 1413 1414 DEBUG_printf(("4httpGetSubField2: name=\"%s\"", temp)); 1415 1416 /* 1417 * Skip trailing chars up to the '='... 1418 */ 1419 1420 while (_cups_isspace(*fptr)) 1421 fptr ++; 1422 1423 if (!*fptr) 1424 break; 1425 1426 if (*fptr != '=') 1427 continue; 1428 1429 /* 1430 * Skip = and leading whitespace... 1431 */ 1432 1433 fptr ++; 1434 1435 while (_cups_isspace(*fptr)) 1436 fptr ++; 1437 1438 if (*fptr == '\"') 1439 { 1440 /* 1441 * Read quoted string... 1442 */ 1443 1444 for (ptr = value, fptr ++; 1445 *fptr && *fptr != '\"' && ptr < end; 1446 *ptr++ = *fptr++); 1447 1448 *ptr = '\0'; 1449 1450 while (*fptr && *fptr != '\"') 1451 fptr ++; 1452 1453 if (*fptr) 1454 fptr ++; 1455 } 1456 else 1457 { 1458 /* 1459 * Read unquoted string... 1460 */ 1461 1462 for (ptr = value; 1463 *fptr && !_cups_isspace(*fptr) && *fptr != ',' && ptr < end; 1464 *ptr++ = *fptr++); 1465 1466 *ptr = '\0'; 1467 1468 while (*fptr && !_cups_isspace(*fptr) && *fptr != ',') 1469 fptr ++; 1470 } 1471 1472 DEBUG_printf(("4httpGetSubField2: value=\"%s\"", value)); 1473 1474 /* 1475 * See if this is the one... 1476 */ 1477 1478 if (!strcmp(name, temp)) 1479 { 1480 DEBUG_printf(("3httpGetSubField2: Returning \"%s\"", value)); 1481 return (value); 1482 } 1483 } 1484 1485 value[0] = '\0'; 1486 1487 DEBUG_puts("3httpGetSubField2: Returning NULL"); 1488 1489 return (NULL); 1490 } 1491 1492 1493 /* 1494 * 'httpGetVersion()' - Get the HTTP version at the other end. 1495 */ 1496 1497 http_version_t /* O - Version number */ 1498 httpGetVersion(http_t *http) /* I - HTTP connection */ 1499 { 1500 return (http ? http->version : HTTP_VERSION_1_0); 1501 } 1502 1503 1504 /* 1505 * 'httpHead()' - Send a HEAD request to the server. 1506 */ 1507 1508 int /* O - Status of call (0 = success) */ 1509 httpHead(http_t *http, /* I - HTTP connection */ 1510 const char *uri) /* I - URI for head */ 1511 { 1512 DEBUG_printf(("httpHead(http=%p, uri=\"%s\")", (void *)http, uri)); 1513 return (http_send(http, HTTP_STATE_HEAD, uri)); 1514 } 1515 1516 1517 /* 1518 * 'httpInitialize()' - Initialize the HTTP interface library and set the 1519 * default HTTP proxy (if any). 1520 */ 1521 1522 void 1523 httpInitialize(void) 1524 { 1525 static int initialized = 0; /* Have we been called before? */ 1526 #ifdef WIN32 1527 WSADATA winsockdata; /* WinSock data */ 1528 #endif /* WIN32 */ 1529 1530 1531 _cupsGlobalLock(); 1532 if (initialized) 1533 { 1534 _cupsGlobalUnlock(); 1535 return; 1536 } 1537 1538 #ifdef WIN32 1539 WSAStartup(MAKEWORD(2,2), &winsockdata); 1540 1541 #elif !defined(SO_NOSIGPIPE) 1542 /* 1543 * Ignore SIGPIPE signals... 1544 */ 1545 1546 # ifdef HAVE_SIGSET 1547 sigset(SIGPIPE, SIG_IGN); 1548 1549 # elif defined(HAVE_SIGACTION) 1550 struct sigaction action; /* POSIX sigaction data */ 1551 1552 1553 memset(&action, 0, sizeof(action)); 1554 action.sa_handler = SIG_IGN; 1555 sigaction(SIGPIPE, &action, NULL); 1556 1557 # else 1558 signal(SIGPIPE, SIG_IGN); 1559 # endif /* !SO_NOSIGPIPE */ 1560 #endif /* WIN32 */ 1561 1562 # ifdef HAVE_SSL 1563 _httpTLSInitialize(); 1564 # endif /* HAVE_SSL */ 1565 1566 initialized = 1; 1567 _cupsGlobalUnlock(); 1568 } 1569 1570 1571 /* 1572 * 'httpIsChunked()' - Report whether a message body is chunked. 1573 * 1574 * This function returns non-zero if the message body is composed of 1575 * variable-length chunks. 1576 * 1577 * @since CUPS 2.0/OS 10.10@ 1578 */ 1579 1580 int /* O - 1 if chunked, 0 if not */ 1581 httpIsChunked(http_t *http) /* I - HTTP connection */ 1582 { 1583 return (http ? http->data_encoding == HTTP_ENCODING_CHUNKED : 0); 1584 } 1585 1586 1587 /* 1588 * 'httpIsEncrypted()' - Report whether a connection is encrypted. 1589 * 1590 * This function returns non-zero if the connection is currently encrypted. 1591 * 1592 * @since CUPS 2.0/OS 10.10@ 1593 */ 1594 1595 int /* O - 1 if encrypted, 0 if not */ 1596 httpIsEncrypted(http_t *http) /* I - HTTP connection */ 1597 { 1598 return (http ? http->tls != NULL : 0); 1599 } 1600 1601 1602 /* 1603 * 'httpOptions()' - Send an OPTIONS request to the server. 1604 */ 1605 1606 int /* O - Status of call (0 = success) */ 1607 httpOptions(http_t *http, /* I - HTTP connection */ 1608 const char *uri) /* I - URI for options */ 1609 { 1610 return (http_send(http, HTTP_STATE_OPTIONS, uri)); 1611 } 1612 1613 1614 /* 1615 * 'httpPeek()' - Peek at data from a HTTP connection. 1616 * 1617 * This function copies available data from the given HTTP connection, reading 1618 * a buffer as needed. The data is still available for reading using 1619 * @link httpRead@ or @link httpRead2@. 1620 * 1621 * For non-blocking connections the usual timeouts apply. 1622 * 1623 * @since CUPS 1.7/macOS 10.9@ 1624 */ 1625 1626 ssize_t /* O - Number of bytes copied */ 1627 httpPeek(http_t *http, /* I - HTTP connection */ 1628 char *buffer, /* I - Buffer for data */ 1629 size_t length) /* I - Maximum number of bytes */ 1630 { 1631 ssize_t bytes; /* Bytes read */ 1632 char len[32]; /* Length string */ 1633 1634 1635 DEBUG_printf(("httpPeek(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); 1636 1637 if (http == NULL || buffer == NULL) 1638 return (-1); 1639 1640 http->activity = time(NULL); 1641 http->error = 0; 1642 1643 if (length <= 0) 1644 return (0); 1645 1646 if (http->data_encoding == HTTP_ENCODING_CHUNKED && 1647 http->data_remaining <= 0) 1648 { 1649 DEBUG_puts("2httpPeek: Getting chunk length..."); 1650 1651 if (httpGets(len, sizeof(len), http) == NULL) 1652 { 1653 DEBUG_puts("1httpPeek: Could not get length!"); 1654 return (0); 1655 } 1656 1657 if (!len[0]) 1658 { 1659 DEBUG_puts("1httpPeek: Blank chunk length, trying again..."); 1660 if (!httpGets(len, sizeof(len), http)) 1661 { 1662 DEBUG_puts("1httpPeek: Could not get chunk length."); 1663 return (0); 1664 } 1665 } 1666 1667 http->data_remaining = strtoll(len, NULL, 16); 1668 1669 if (http->data_remaining < 0) 1670 { 1671 DEBUG_puts("1httpPeek: Negative chunk length!"); 1672 return (0); 1673 } 1674 } 1675 1676 DEBUG_printf(("2httpPeek: data_remaining=" CUPS_LLFMT, 1677 CUPS_LLCAST http->data_remaining)); 1678 1679 if (http->data_remaining <= 0 && http->data_encoding != HTTP_ENCODING_FIELDS) 1680 { 1681 /* 1682 * A zero-length chunk ends a transfer; unless we are reading POST 1683 * data, go idle... 1684 */ 1685 1686 #ifdef HAVE_LIBZ 1687 if (http->coding >= _HTTP_CODING_GUNZIP) 1688 http_content_coding_finish(http); 1689 #endif /* HAVE_LIBZ */ 1690 1691 if (http->data_encoding == HTTP_ENCODING_CHUNKED) 1692 httpGets(len, sizeof(len), http); 1693 1694 if (http->state == HTTP_STATE_POST_RECV) 1695 http->state ++; 1696 else 1697 http->state = HTTP_STATE_STATUS; 1698 1699 DEBUG_printf(("1httpPeek: 0-length chunk, set state to %s.", 1700 httpStateString(http->state))); 1701 1702 /* 1703 * Prevent future reads for this request... 1704 */ 1705 1706 http->data_encoding = HTTP_ENCODING_FIELDS; 1707 1708 return (0); 1709 } 1710 else if (length > (size_t)http->data_remaining) 1711 length = (size_t)http->data_remaining; 1712 1713 #ifdef HAVE_LIBZ 1714 if (http->used == 0 && 1715 (http->coding == _HTTP_CODING_IDENTITY || 1716 (http->coding >= _HTTP_CODING_GUNZIP && http->stream.avail_in == 0))) 1717 #else 1718 if (http->used == 0) 1719 #endif /* HAVE_LIBZ */ 1720 { 1721 /* 1722 * Buffer small reads for better performance... 1723 */ 1724 1725 ssize_t buflen; /* Length of read for buffer */ 1726 1727 if (!http->blocking) 1728 { 1729 while (!httpWait(http, http->wait_value)) 1730 { 1731 if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) 1732 continue; 1733 1734 return (0); 1735 } 1736 } 1737 1738 if ((size_t)http->data_remaining > sizeof(http->buffer)) 1739 buflen = sizeof(http->buffer); 1740 else 1741 buflen = (ssize_t)http->data_remaining; 1742 1743 DEBUG_printf(("2httpPeek: Reading %d bytes into buffer.", (int)buflen)); 1744 bytes = http_read(http, http->buffer, (size_t)buflen); 1745 1746 DEBUG_printf(("2httpPeek: Read " CUPS_LLFMT " bytes into buffer.", 1747 CUPS_LLCAST bytes)); 1748 if (bytes > 0) 1749 { 1750 #ifdef DEBUG 1751 http_debug_hex("httpPeek", http->buffer, (int)bytes); 1752 #endif /* DEBUG */ 1753 1754 http->used = (int)bytes; 1755 } 1756 } 1757 1758 #ifdef HAVE_LIBZ 1759 if (http->coding >= _HTTP_CODING_GUNZIP) 1760 { 1761 # ifdef HAVE_INFLATECOPY 1762 int zerr; /* Decompressor error */ 1763 z_stream stream; /* Copy of decompressor stream */ 1764 1765 if (http->used > 0 && http->stream.avail_in < HTTP_MAX_BUFFER) 1766 { 1767 size_t buflen = buflen = HTTP_MAX_BUFFER - http->stream.avail_in; 1768 /* Number of bytes to copy */ 1769 1770 if (http->stream.avail_in > 0 && 1771 http->stream.next_in > http->sbuffer) 1772 memmove(http->sbuffer, http->stream.next_in, http->stream.avail_in); 1773 1774 http->stream.next_in = http->sbuffer; 1775 1776 if (buflen > (size_t)http->data_remaining) 1777 buflen = (size_t)http->data_remaining; 1778 1779 if (buflen > (size_t)http->used) 1780 buflen = (size_t)http->used; 1781 1782 DEBUG_printf(("1httpPeek: Copying %d more bytes of data into " 1783 "decompression buffer.", (int)buflen)); 1784 1785 memcpy(http->sbuffer + http->stream.avail_in, http->buffer, buflen); 1786 http->stream.avail_in += buflen; 1787 http->used -= (int)buflen; 1788 http->data_remaining -= (off_t)buflen; 1789 1790 if (http->used > 0) 1791 memmove(http->buffer, http->buffer + buflen, (size_t)http->used); 1792 } 1793 1794 DEBUG_printf(("2httpPeek: length=%d, avail_in=%d", (int)length, 1795 (int)http->stream.avail_in)); 1796 1797 if (inflateCopy(&stream, &(http->stream)) != Z_OK) 1798 { 1799 DEBUG_puts("2httpPeek: Unable to copy decompressor stream."); 1800 http->error = ENOMEM; 1801 return (-1); 1802 } 1803 1804 stream.next_out = (Bytef *)buffer; 1805 stream.avail_out = (uInt)length; 1806 1807 zerr = inflate(&stream, Z_SYNC_FLUSH); 1808 inflateEnd(&stream); 1809 1810 if (zerr < Z_OK) 1811 { 1812 DEBUG_printf(("2httpPeek: zerr=%d", zerr)); 1813 #ifdef DEBUG 1814 http_debug_hex("2httpPeek", (char *)http->sbuffer, (int)http->stream.avail_in); 1815 #endif /* DEBUG */ 1816 1817 http->error = EIO; 1818 return (-1); 1819 } 1820 1821 bytes = (ssize_t)(length - http->stream.avail_out); 1822 1823 # else 1824 DEBUG_puts("2httpPeek: No inflateCopy on this platform, httpPeek does not " 1825 "work with compressed streams."); 1826 return (-1); 1827 # endif /* HAVE_INFLATECOPY */ 1828 } 1829 else 1830 #endif /* HAVE_LIBZ */ 1831 if (http->used > 0) 1832 { 1833 if (length > (size_t)http->used) 1834 length = (size_t)http->used; 1835 1836 bytes = (ssize_t)length; 1837 1838 DEBUG_printf(("2httpPeek: grabbing %d bytes from input buffer...", 1839 (int)bytes)); 1840 1841 memcpy(buffer, http->buffer, length); 1842 } 1843 else 1844 bytes = 0; 1845 1846 if (bytes < 0) 1847 { 1848 #ifdef WIN32 1849 if (WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEWOULDBLOCK) 1850 bytes = 0; 1851 else 1852 http->error = WSAGetLastError(); 1853 #else 1854 if (errno == EINTR || errno == EAGAIN) 1855 bytes = 0; 1856 else 1857 http->error = errno; 1858 #endif /* WIN32 */ 1859 } 1860 else if (bytes == 0) 1861 { 1862 http->error = EPIPE; 1863 return (0); 1864 } 1865 1866 return (bytes); 1867 } 1868 1869 1870 /* 1871 * 'httpPost()' - Send a POST request to the server. 1872 */ 1873 1874 int /* O - Status of call (0 = success) */ 1875 httpPost(http_t *http, /* I - HTTP connection */ 1876 const char *uri) /* I - URI for post */ 1877 { 1878 return (http_send(http, HTTP_STATE_POST, uri)); 1879 } 1880 1881 1882 /* 1883 * 'httpPrintf()' - Print a formatted string to a HTTP connection. 1884 * 1885 * @private@ 1886 */ 1887 1888 int /* O - Number of bytes written */ 1889 httpPrintf(http_t *http, /* I - HTTP connection */ 1890 const char *format, /* I - printf-style format string */ 1891 ...) /* I - Additional args as needed */ 1892 { 1893 ssize_t bytes; /* Number of bytes to write */ 1894 char buf[16384]; /* Buffer for formatted string */ 1895 va_list ap; /* Variable argument pointer */ 1896 1897 1898 DEBUG_printf(("2httpPrintf(http=%p, format=\"%s\", ...)", (void *)http, format)); 1899 1900 va_start(ap, format); 1901 bytes = vsnprintf(buf, sizeof(buf), format, ap); 1902 va_end(ap); 1903 1904 DEBUG_printf(("3httpPrintf: (" CUPS_LLFMT " bytes) %s", CUPS_LLCAST bytes, buf)); 1905 1906 if (http->data_encoding == HTTP_ENCODING_FIELDS) 1907 return ((int)httpWrite2(http, buf, (size_t)bytes)); 1908 else 1909 { 1910 if (http->wused) 1911 { 1912 DEBUG_puts("4httpPrintf: flushing existing data..."); 1913 1914 if (httpFlushWrite(http) < 0) 1915 return (-1); 1916 } 1917 1918 return ((int)http_write(http, buf, (size_t)bytes)); 1919 } 1920 } 1921 1922 1923 /* 1924 * 'httpPut()' - Send a PUT request to the server. 1925 */ 1926 1927 int /* O - Status of call (0 = success) */ 1928 httpPut(http_t *http, /* I - HTTP connection */ 1929 const char *uri) /* I - URI to put */ 1930 { 1931 DEBUG_printf(("httpPut(http=%p, uri=\"%s\")", (void *)http, uri)); 1932 return (http_send(http, HTTP_STATE_PUT, uri)); 1933 } 1934 1935 1936 /* 1937 * 'httpRead()' - Read data from a HTTP connection. 1938 * 1939 * This function is deprecated. Use the httpRead2() function which can 1940 * read more than 2GB of data. 1941 * 1942 * @deprecated@ 1943 */ 1944 1945 int /* O - Number of bytes read */ 1946 httpRead(http_t *http, /* I - HTTP connection */ 1947 char *buffer, /* I - Buffer for data */ 1948 int length) /* I - Maximum number of bytes */ 1949 { 1950 return ((int)httpRead2(http, buffer, (size_t)length)); 1951 } 1952 1953 1954 /* 1955 * 'httpRead2()' - Read data from a HTTP connection. 1956 * 1957 * @since CUPS 1.2/macOS 10.5@ 1958 */ 1959 1960 ssize_t /* O - Number of bytes read */ 1961 httpRead2(http_t *http, /* I - HTTP connection */ 1962 char *buffer, /* I - Buffer for data */ 1963 size_t length) /* I - Maximum number of bytes */ 1964 { 1965 ssize_t bytes; /* Bytes read */ 1966 1967 1968 #ifdef HAVE_LIBZ 1969 DEBUG_printf(("httpRead2(http=%p, buffer=%p, length=" CUPS_LLFMT ") coding=%d data_encoding=%d data_remaining=" CUPS_LLFMT, (void *)http, (void *)buffer, CUPS_LLCAST length, http->coding, http->data_encoding, CUPS_LLCAST http->data_remaining)); 1970 #else 1971 DEBUG_printf(("httpRead2(http=%p, buffer=%p, length=" CUPS_LLFMT ") data_encoding=%d data_remaining=" CUPS_LLFMT, (void *)http, (void *)buffer, CUPS_LLCAST length, http->data_encoding, CUPS_LLCAST http->data_remaining)); 1972 #endif /* HAVE_LIBZ */ 1973 1974 if (http == NULL || buffer == NULL) 1975 return (-1); 1976 1977 http->activity = time(NULL); 1978 http->error = 0; 1979 1980 if (length <= 0) 1981 return (0); 1982 1983 #ifdef HAVE_LIBZ 1984 if (http->coding >= _HTTP_CODING_GUNZIP) 1985 { 1986 do 1987 { 1988 if (http->stream.avail_in > 0) 1989 { 1990 int zerr; /* Decompressor error */ 1991 1992 DEBUG_printf(("2httpRead2: avail_in=%d, avail_out=%d", 1993 (int)http->stream.avail_in, (int)length)); 1994 1995 http->stream.next_out = (Bytef *)buffer; 1996 http->stream.avail_out = (uInt)length; 1997 1998 if ((zerr = inflate(&(http->stream), Z_SYNC_FLUSH)) < Z_OK) 1999 { 2000 DEBUG_printf(("2httpRead2: zerr=%d", zerr)); 2001 #ifdef DEBUG 2002 http_debug_hex("2httpRead2", (char *)http->sbuffer, (int)http->stream.avail_in); 2003 #endif /* DEBUG */ 2004 2005 http->error = EIO; 2006 return (-1); 2007 } 2008 2009 bytes = (ssize_t)(length - http->stream.avail_out); 2010 2011 DEBUG_printf(("2httpRead2: avail_in=%d, avail_out=%d, bytes=%d", 2012 http->stream.avail_in, http->stream.avail_out, 2013 (int)bytes)); 2014 } 2015 else 2016 bytes = 0; 2017 2018 if (bytes == 0) 2019 { 2020 ssize_t buflen = HTTP_MAX_BUFFER - (ssize_t)http->stream.avail_in; 2021 /* Additional bytes for buffer */ 2022 2023 if (buflen > 0) 2024 { 2025 if (http->stream.avail_in > 0 && 2026 http->stream.next_in > http->sbuffer) 2027 memmove(http->sbuffer, http->stream.next_in, http->stream.avail_in); 2028 2029 http->stream.next_in = http->sbuffer; 2030 2031 DEBUG_printf(("1httpRead2: Reading up to %d more bytes of data into " 2032 "decompression buffer.", (int)buflen)); 2033 2034 if (http->data_remaining > 0) 2035 { 2036 if (buflen > http->data_remaining) 2037 buflen = (ssize_t)http->data_remaining; 2038 2039 bytes = http_read_buffered(http, (char *)http->sbuffer + http->stream.avail_in, (size_t)buflen); 2040 } 2041 else if (http->data_encoding == HTTP_ENCODING_CHUNKED) 2042 bytes = http_read_chunk(http, (char *)http->sbuffer + http->stream.avail_in, (size_t)buflen); 2043 else 2044 bytes = 0; 2045 2046 if (bytes < 0) 2047 return (bytes); 2048 else if (bytes == 0) 2049 break; 2050 2051 DEBUG_printf(("1httpRead2: Adding " CUPS_LLFMT " bytes to " 2052 "decompression buffer.", CUPS_LLCAST bytes)); 2053 2054 http->data_remaining -= bytes; 2055 http->stream.avail_in += (uInt)bytes; 2056 2057 if (http->data_remaining <= 0 && 2058 http->data_encoding == HTTP_ENCODING_CHUNKED) 2059 { 2060 /* 2061 * Read the trailing blank line now... 2062 */ 2063 2064 char len[32]; /* Length string */ 2065 2066 httpGets(len, sizeof(len), http); 2067 } 2068 2069 bytes = 0; 2070 } 2071 else 2072 return (0); 2073 } 2074 } 2075 while (bytes == 0); 2076 } 2077 else 2078 #endif /* HAVE_LIBZ */ 2079 if (http->data_remaining == 0 && http->data_encoding == HTTP_ENCODING_CHUNKED) 2080 { 2081 if ((bytes = http_read_chunk(http, buffer, length)) > 0) 2082 { 2083 http->data_remaining -= bytes; 2084 2085 if (http->data_remaining <= 0) 2086 { 2087 /* 2088 * Read the trailing blank line now... 2089 */ 2090 2091 char len[32]; /* Length string */ 2092 2093 httpGets(len, sizeof(len), http); 2094 } 2095 } 2096 } 2097 else if (http->data_remaining <= 0) 2098 { 2099 /* 2100 * No more data to read... 2101 */ 2102 2103 return (0); 2104 } 2105 else 2106 { 2107 DEBUG_printf(("1httpRead2: Reading up to %d bytes into buffer.", 2108 (int)length)); 2109 2110 if (length > (size_t)http->data_remaining) 2111 length = (size_t)http->data_remaining; 2112 2113 if ((bytes = http_read_buffered(http, buffer, length)) > 0) 2114 { 2115 http->data_remaining -= bytes; 2116 2117 if (http->data_remaining <= 0 && 2118 http->data_encoding == HTTP_ENCODING_CHUNKED) 2119 { 2120 /* 2121 * Read the trailing blank line now... 2122 */ 2123 2124 char len[32]; /* Length string */ 2125 2126 httpGets(len, sizeof(len), http); 2127 } 2128 } 2129 } 2130 2131 if ( 2132 #ifdef HAVE_LIBZ 2133 (http->coding == _HTTP_CODING_IDENTITY || 2134 (http->coding >= _HTTP_CODING_GUNZIP && http->stream.avail_in == 0)) && 2135 #endif /* HAVE_LIBZ */ 2136 ((http->data_remaining <= 0 && 2137 http->data_encoding == HTTP_ENCODING_LENGTH) || 2138 (http->data_encoding == HTTP_ENCODING_CHUNKED && bytes == 0))) 2139 { 2140 #ifdef HAVE_LIBZ 2141 if (http->coding >= _HTTP_CODING_GUNZIP) 2142 http_content_coding_finish(http); 2143 #endif /* HAVE_LIBZ */ 2144 2145 if (http->state == HTTP_STATE_POST_RECV) 2146 http->state ++; 2147 else if (http->state == HTTP_STATE_GET_SEND || 2148 http->state == HTTP_STATE_POST_SEND) 2149 http->state = HTTP_STATE_WAITING; 2150 else 2151 http->state = HTTP_STATE_STATUS; 2152 2153 DEBUG_printf(("1httpRead2: End of content, set state to %s.", 2154 httpStateString(http->state))); 2155 } 2156 2157 return (bytes); 2158 } 2159 2160 2161 /* 2162 * 'httpReadRequest()' - Read a HTTP request from a connection. 2163 * 2164 * @since CUPS 1.7/macOS 10.9@ 2165 */ 2166 2167 http_state_t /* O - New state of connection */ 2168 httpReadRequest(http_t *http, /* I - HTTP connection */ 2169 char *uri, /* I - URI buffer */ 2170 size_t urilen) /* I - Size of URI buffer */ 2171 { 2172 char line[4096], /* HTTP request line */ 2173 *req_method, /* HTTP request method */ 2174 *req_uri, /* HTTP request URI */ 2175 *req_version; /* HTTP request version number string */ 2176 2177 2178 /* 2179 * Range check input... 2180 */ 2181 2182 DEBUG_printf(("httpReadRequest(http=%p, uri=%p, urilen=" CUPS_LLFMT ")", (void *)http, (void *)uri, CUPS_LLCAST urilen)); 2183 2184 if (uri) 2185 *uri = '\0'; 2186 2187 if (!http || !uri || urilen < 1) 2188 { 2189 DEBUG_puts("1httpReadRequest: Bad arguments, returning HTTP_STATE_ERROR."); 2190 return (HTTP_STATE_ERROR); 2191 } 2192 else if (http->state != HTTP_STATE_WAITING) 2193 { 2194 DEBUG_printf(("1httpReadRequest: Bad state %s, returning HTTP_STATE_ERROR.", 2195 httpStateString(http->state))); 2196 return (HTTP_STATE_ERROR); 2197 } 2198 2199 /* 2200 * Reset state... 2201 */ 2202 2203 httpClearFields(http); 2204 2205 http->activity = time(NULL); 2206 http->data_encoding = HTTP_ENCODING_FIELDS; 2207 http->data_remaining = 0; 2208 http->keep_alive = HTTP_KEEPALIVE_OFF; 2209 http->status = HTTP_STATUS_OK; 2210 http->version = HTTP_VERSION_1_1; 2211 2212 /* 2213 * Read a line from the socket... 2214 */ 2215 2216 if (!httpGets(line, sizeof(line), http)) 2217 { 2218 DEBUG_puts("1httpReadRequest: Unable to read, returning HTTP_STATE_ERROR"); 2219 return (HTTP_STATE_ERROR); 2220 } 2221 2222 if (!line[0]) 2223 { 2224 DEBUG_puts("1httpReadRequest: Blank line, returning HTTP_STATE_WAITING"); 2225 return (HTTP_STATE_WAITING); 2226 } 2227 2228 DEBUG_printf(("1httpReadRequest: %s", line)); 2229 2230 /* 2231 * Parse it... 2232 */ 2233 2234 req_method = line; 2235 req_uri = line; 2236 2237 while (*req_uri && !isspace(*req_uri & 255)) 2238 req_uri ++; 2239 2240 if (!*req_uri) 2241 { 2242 DEBUG_puts("1httpReadRequest: No request URI."); 2243 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No request URI."), 1); 2244 return (HTTP_STATE_ERROR); 2245 } 2246 2247 *req_uri++ = '\0'; 2248 2249 while (*req_uri && isspace(*req_uri & 255)) 2250 req_uri ++; 2251 2252 req_version = req_uri; 2253 2254 while (*req_version && !isspace(*req_version & 255)) 2255 req_version ++; 2256 2257 if (!*req_version) 2258 { 2259 DEBUG_puts("1httpReadRequest: No request protocol version."); 2260 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No request protocol version."), 1); 2261 return (HTTP_STATE_ERROR); 2262 } 2263 2264 *req_version++ = '\0'; 2265 2266 while (*req_version && isspace(*req_version & 255)) 2267 req_version ++; 2268 2269 /* 2270 * Validate... 2271 */ 2272 2273 if (!strcmp(req_method, "OPTIONS")) 2274 http->state = HTTP_STATE_OPTIONS; 2275 else if (!strcmp(req_method, "GET")) 2276 http->state = HTTP_STATE_GET; 2277 else if (!strcmp(req_method, "HEAD")) 2278 http->state = HTTP_STATE_HEAD; 2279 else if (!strcmp(req_method, "POST")) 2280 http->state = HTTP_STATE_POST; 2281 else if (!strcmp(req_method, "PUT")) 2282 http->state = HTTP_STATE_PUT; 2283 else if (!strcmp(req_method, "DELETE")) 2284 http->state = HTTP_STATE_DELETE; 2285 else if (!strcmp(req_method, "TRACE")) 2286 http->state = HTTP_STATE_TRACE; 2287 else if (!strcmp(req_method, "CONNECT")) 2288 http->state = HTTP_STATE_CONNECT; 2289 else 2290 { 2291 DEBUG_printf(("1httpReadRequest: Unknown method \"%s\".", req_method)); 2292 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown request method."), 1); 2293 return (HTTP_STATE_UNKNOWN_METHOD); 2294 } 2295 2296 DEBUG_printf(("1httpReadRequest: Set state to %s.", 2297 httpStateString(http->state))); 2298 2299 if (!strcmp(req_version, "HTTP/1.0")) 2300 { 2301 http->version = HTTP_VERSION_1_0; 2302 http->keep_alive = HTTP_KEEPALIVE_OFF; 2303 } 2304 else if (!strcmp(req_version, "HTTP/1.1")) 2305 { 2306 http->version = HTTP_VERSION_1_1; 2307 http->keep_alive = HTTP_KEEPALIVE_ON; 2308 } 2309 else 2310 { 2311 DEBUG_printf(("1httpReadRequest: Unknown version \"%s\".", req_version)); 2312 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown request version."), 1); 2313 return (HTTP_STATE_UNKNOWN_VERSION); 2314 } 2315 2316 DEBUG_printf(("1httpReadRequest: URI is \"%s\".", req_uri)); 2317 strlcpy(uri, req_uri, urilen); 2318 2319 return (http->state); 2320 } 2321 2322 2323 /* 2324 * 'httpReconnect()' - Reconnect to a HTTP server. 2325 * 2326 * This function is deprecated. Please use the @link httpReconnect2@ function 2327 * instead. 2328 * 2329 * @deprecated@ 2330 */ 2331 2332 int /* O - 0 on success, non-zero on failure */ 2333 httpReconnect(http_t *http) /* I - HTTP connection */ 2334 { 2335 DEBUG_printf(("httpReconnect(http=%p)", (void *)http)); 2336 2337 return (httpReconnect2(http, 30000, NULL)); 2338 } 2339 2340 2341 /* 2342 * 'httpReconnect2()' - Reconnect to a HTTP server with timeout and optional 2343 * cancel. 2344 */ 2345 2346 int /* O - 0 on success, non-zero on failure */ 2347 httpReconnect2(http_t *http, /* I - HTTP connection */ 2348 int msec, /* I - Timeout in milliseconds */ 2349 int *cancel) /* I - Pointer to "cancel" variable */ 2350 { 2351 http_addrlist_t *addr; /* Connected address */ 2352 #ifdef DEBUG 2353 http_addrlist_t *current; /* Current address */ 2354 char temp[256]; /* Temporary address string */ 2355 #endif /* DEBUG */ 2356 2357 2358 DEBUG_printf(("httpReconnect2(http=%p, msec=%d, cancel=%p)", (void *)http, msec, (void *)cancel)); 2359 2360 if (!http) 2361 { 2362 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); 2363 return (-1); 2364 } 2365 2366 #ifdef HAVE_SSL 2367 if (http->tls) 2368 { 2369 DEBUG_puts("2httpReconnect2: Shutting down SSL/TLS..."); 2370 _httpTLSStop(http); 2371 } 2372 #endif /* HAVE_SSL */ 2373 2374 /* 2375 * Close any previously open socket... 2376 */ 2377 2378 if (http->fd >= 0) 2379 { 2380 DEBUG_printf(("2httpReconnect2: Closing socket %d...", http->fd)); 2381 2382 httpAddrClose(NULL, http->fd); 2383 2384 http->fd = -1; 2385 } 2386 2387 /* 2388 * Reset all state (except fields, which may be reused)... 2389 */ 2390 2391 http->state = HTTP_STATE_WAITING; 2392 http->version = HTTP_VERSION_1_1; 2393 http->keep_alive = HTTP_KEEPALIVE_OFF; 2394 memset(&http->_hostaddr, 0, sizeof(http->_hostaddr)); 2395 http->data_encoding = HTTP_ENCODING_FIELDS; 2396 http->_data_remaining = 0; 2397 http->used = 0; 2398 http->data_remaining = 0; 2399 http->hostaddr = NULL; 2400 http->wused = 0; 2401 2402 /* 2403 * Connect to the server... 2404 */ 2405 2406 #ifdef DEBUG 2407 for (current = http->addrlist; current; current = current->next) 2408 DEBUG_printf(("2httpReconnect2: Address %s:%d", 2409 httpAddrString(&(current->addr), temp, sizeof(temp)), 2410 httpAddrPort(&(current->addr)))); 2411 #endif /* DEBUG */ 2412 2413 if ((addr = httpAddrConnect2(http->addrlist, &(http->fd), msec, cancel)) == NULL) 2414 { 2415 /* 2416 * Unable to connect... 2417 */ 2418 2419 #ifdef WIN32 2420 http->error = WSAGetLastError(); 2421 #else 2422 http->error = errno; 2423 #endif /* WIN32 */ 2424 http->status = HTTP_STATUS_ERROR; 2425 2426 DEBUG_printf(("1httpReconnect2: httpAddrConnect failed: %s", 2427 strerror(http->error))); 2428 2429 return (-1); 2430 } 2431 2432 DEBUG_printf(("2httpReconnect2: New socket=%d", http->fd)); 2433 2434 if (http->timeout_value > 0) 2435 http_set_timeout(http->fd, http->timeout_value); 2436 2437 http->hostaddr = &(addr->addr); 2438 http->error = 0; 2439 2440 #ifdef HAVE_SSL 2441 if (http->encryption == HTTP_ENCRYPTION_ALWAYS) 2442 { 2443 /* 2444 * Always do encryption via SSL. 2445 */ 2446 2447 if (_httpTLSStart(http) != 0) 2448 { 2449 httpAddrClose(NULL, http->fd); 2450 2451 return (-1); 2452 } 2453 } 2454 else if (http->encryption == HTTP_ENCRYPTION_REQUIRED && !http->tls_upgrade) 2455 return (http_tls_upgrade(http)); 2456 #endif /* HAVE_SSL */ 2457 2458 DEBUG_printf(("1httpReconnect2: Connected to %s:%d...", 2459 httpAddrString(http->hostaddr, temp, sizeof(temp)), 2460 httpAddrPort(http->hostaddr))); 2461 2462 return (0); 2463 } 2464 2465 2466 /* 2467 * 'httpSetAuthString()' - Set the current authorization string. 2468 * 2469 * This function just stores a copy of the current authorization string in 2470 * the HTTP connection object. You must still call httpSetField() to set 2471 * HTTP_FIELD_AUTHORIZATION prior to issuing a HTTP request using httpGet(), 2472 * httpHead(), httpOptions(), httpPost, or httpPut(). 2473 * 2474 * @since CUPS 1.3/macOS 10.5@ 2475 */ 2476 2477 void 2478 httpSetAuthString(http_t *http, /* I - HTTP connection */ 2479 const char *scheme, /* I - Auth scheme (NULL to clear it) */ 2480 const char *data) /* I - Auth data (NULL for none) */ 2481 { 2482 /* 2483 * Range check input... 2484 */ 2485 2486 if (!http) 2487 return; 2488 2489 if (http->authstring && http->authstring != http->_authstring) 2490 free(http->authstring); 2491 2492 http->authstring = http->_authstring; 2493 2494 if (scheme) 2495 { 2496 /* 2497 * Set the current authorization string... 2498 */ 2499 2500 size_t len = strlen(scheme) + (data ? strlen(data) + 1 : 0) + 1; 2501 char *temp; 2502 2503 if (len > sizeof(http->_authstring)) 2504 { 2505 if ((temp = malloc(len)) == NULL) 2506 len = sizeof(http->_authstring); 2507 else 2508 http->authstring = temp; 2509 } 2510 2511 if (data) 2512 snprintf(http->authstring, len, "%s %s", scheme, data); 2513 else 2514 strlcpy(http->authstring, scheme, len); 2515 } 2516 else 2517 { 2518 /* 2519 * Clear the current authorization string... 2520 */ 2521 2522 http->_authstring[0] = '\0'; 2523 } 2524 } 2525 2526 2527 /* 2528 * 'httpSetCredentials()' - Set the credentials associated with an encrypted 2529 * connection. 2530 * 2531 * @since CUPS 1.5/macOS 10.7@ 2532 */ 2533 2534 int /* O - Status of call (0 = success) */ 2535 httpSetCredentials(http_t *http, /* I - HTTP connection */ 2536 cups_array_t *credentials) /* I - Array of credentials */ 2537 { 2538 if (!http || cupsArrayCount(credentials) < 1) 2539 return (-1); 2540 2541 #ifdef HAVE_SSL 2542 _httpFreeCredentials(http->tls_credentials); 2543 2544 http->tls_credentials = _httpCreateCredentials(credentials); 2545 #endif /* HAVE_SSL */ 2546 2547 return (http->tls_credentials ? 0 : -1); 2548 } 2549 2550 2551 /* 2552 * 'httpSetCookie()' - Set the cookie value(s). 2553 * 2554 * @since CUPS 1.1.19/macOS 10.3@ 2555 */ 2556 2557 void 2558 httpSetCookie(http_t *http, /* I - Connection */ 2559 const char *cookie) /* I - Cookie string */ 2560 { 2561 if (!http) 2562 return; 2563 2564 if (http->cookie) 2565 free(http->cookie); 2566 2567 if (cookie) 2568 http->cookie = strdup(cookie); 2569 else 2570 http->cookie = NULL; 2571 } 2572 2573 2574 /* 2575 * 'httpSetDefaultField()' - Set the default value of an HTTP header. 2576 * 2577 * Currently only @code HTTP_FIELD_ACCEPT_ENCODING@, @code HTTP_FIELD_SERVER@, 2578 * and @code HTTP_FIELD_USER_AGENT@ can be set. 2579 * 2580 * @since CUPS 1.7/macOS 10.9@ 2581 */ 2582 2583 void 2584 httpSetDefaultField(http_t *http, /* I - HTTP connection */ 2585 http_field_t field, /* I - Field index */ 2586 const char *value)/* I - Value */ 2587 { 2588 DEBUG_printf(("httpSetDefaultField(http=%p, field=%d(%s), value=\"%s\")", (void *)http, field, http_fields[field], value)); 2589 2590 if (!http) 2591 return; 2592 2593 switch (field) 2594 { 2595 case HTTP_FIELD_ACCEPT_ENCODING : 2596 if (http->default_accept_encoding) 2597 _cupsStrFree(http->default_accept_encoding); 2598 2599 http->default_accept_encoding = value ? _cupsStrAlloc(value) : NULL; 2600 break; 2601 2602 case HTTP_FIELD_SERVER : 2603 if (http->default_server) 2604 _cupsStrFree(http->default_server); 2605 2606 http->default_server = value ? _cupsStrAlloc(value) : NULL; 2607 break; 2608 2609 case HTTP_FIELD_USER_AGENT : 2610 if (http->default_user_agent) 2611 _cupsStrFree(http->default_user_agent); 2612 2613 http->default_user_agent = value ? _cupsStrAlloc(value) : NULL; 2614 break; 2615 2616 default : 2617 DEBUG_puts("1httpSetDefaultField: Ignored."); 2618 break; 2619 } 2620 } 2621 2622 2623 /* 2624 * 'httpSetExpect()' - Set the Expect: header in a request. 2625 * 2626 * Currently only @code HTTP_STATUS_CONTINUE@ is supported for the "expect" 2627 * argument. 2628 * 2629 * @since CUPS 1.2/macOS 10.5@ 2630 */ 2631 2632 void 2633 httpSetExpect(http_t *http, /* I - HTTP connection */ 2634 http_status_t expect) /* I - HTTP status to expect 2635 (@code HTTP_STATUS_CONTINUE@) */ 2636 { 2637 DEBUG_printf(("httpSetExpect(http=%p, expect=%d)", (void *)http, expect)); 2638 2639 if (http) 2640 http->expect = expect; 2641 } 2642 2643 2644 /* 2645 * 'httpSetField()' - Set the value of an HTTP header. 2646 */ 2647 2648 void 2649 httpSetField(http_t *http, /* I - HTTP connection */ 2650 http_field_t field, /* I - Field index */ 2651 const char *value) /* I - Value */ 2652 { 2653 DEBUG_printf(("httpSetField(http=%p, field=%d(%s), value=\"%s\")", (void *)http, field, http_fields[field], value)); 2654 2655 if (http == NULL || 2656 field < HTTP_FIELD_ACCEPT_LANGUAGE || 2657 field >= HTTP_FIELD_MAX || 2658 value == NULL) 2659 return; 2660 2661 switch (field) 2662 { 2663 case HTTP_FIELD_ACCEPT_ENCODING : 2664 if (http->accept_encoding) 2665 _cupsStrFree(http->accept_encoding); 2666 2667 http->accept_encoding = _cupsStrAlloc(value); 2668 break; 2669 2670 case HTTP_FIELD_ALLOW : 2671 if (http->allow) 2672 _cupsStrFree(http->allow); 2673 2674 http->allow = _cupsStrAlloc(value); 2675 break; 2676 2677 case HTTP_FIELD_SERVER : 2678 if (http->server) 2679 _cupsStrFree(http->server); 2680 2681 http->server = _cupsStrAlloc(value); 2682 break; 2683 2684 case HTTP_FIELD_WWW_AUTHENTICATE : 2685 /* CUPS STR #4503 - don't override WWW-Authenticate for unknown auth schemes */ 2686 if (http->fields[HTTP_FIELD_WWW_AUTHENTICATE][0] && 2687 _cups_strncasecmp(value, "Basic ", 6) && 2688 _cups_strncasecmp(value, "Digest ", 7) && 2689 _cups_strncasecmp(value, "Negotiate ", 10)) 2690 { 2691 DEBUG_printf(("1httpSetField: Ignoring unknown auth scheme in \"%s\".", value)); 2692 return; 2693 } 2694 2695 /* Fall through to copy */ 2696 2697 default : 2698 strlcpy(http->fields[field], value, HTTP_MAX_VALUE); 2699 break; 2700 } 2701 2702 if (field == HTTP_FIELD_AUTHORIZATION) 2703 { 2704 /* 2705 * Special case for Authorization: as its contents can be 2706 * longer than HTTP_MAX_VALUE 2707 */ 2708 2709 if (http->field_authorization) 2710 free(http->field_authorization); 2711 2712 http->field_authorization = strdup(value); 2713 } 2714 else if (field == HTTP_FIELD_HOST) 2715 { 2716 /* 2717 * Special-case for Host: as we don't want a trailing "." on the hostname and 2718 * need to bracket IPv6 numeric addresses. 2719 */ 2720 2721 char *ptr = strchr(value, ':'); 2722 2723 if (value[0] != '[' && ptr && strchr(ptr + 1, ':')) 2724 { 2725 /* 2726 * Bracket IPv6 numeric addresses... 2727 * 2728 * This is slightly inefficient (basically copying twice), but is an edge 2729 * case and not worth optimizing... 2730 */ 2731 2732 snprintf(http->fields[HTTP_FIELD_HOST], 2733 sizeof(http->fields[HTTP_FIELD_HOST]), "[%s]", value); 2734 } 2735 else 2736 { 2737 /* 2738 * Check for a trailing dot on the hostname... 2739 */ 2740 2741 ptr = http->fields[HTTP_FIELD_HOST]; 2742 2743 if (*ptr) 2744 { 2745 ptr += strlen(ptr) - 1; 2746 2747 if (*ptr == '.') 2748 *ptr = '\0'; 2749 } 2750 } 2751 } 2752 #ifdef HAVE_LIBZ 2753 else if (field == HTTP_FIELD_CONTENT_ENCODING && 2754 http->data_encoding != HTTP_ENCODING_FIELDS) 2755 { 2756 DEBUG_puts("1httpSetField: Calling http_content_coding_start."); 2757 http_content_coding_start(http, value); 2758 } 2759 #endif /* HAVE_LIBZ */ 2760 } 2761 2762 2763 /* 2764 * 'httpSetKeepAlive()' - Set the current Keep-Alive state of a connection. 2765 * 2766 * @since CUPS 2.0/OS 10.10@ 2767 */ 2768 2769 void 2770 httpSetKeepAlive( 2771 http_t *http, /* I - HTTP connection */ 2772 http_keepalive_t keep_alive) /* I - New Keep-Alive value */ 2773 { 2774 if (http) 2775 http->keep_alive = keep_alive; 2776 } 2777 2778 2779 /* 2780 * 'httpSetLength()' - Set the content-length and content-encoding. 2781 * 2782 * @since CUPS 1.2/macOS 10.5@ 2783 */ 2784 2785 void 2786 httpSetLength(http_t *http, /* I - HTTP connection */ 2787 size_t length) /* I - Length (0 for chunked) */ 2788 { 2789 DEBUG_printf(("httpSetLength(http=%p, length=" CUPS_LLFMT ")", (void *)http, CUPS_LLCAST length)); 2790 2791 if (!http) 2792 return; 2793 2794 if (!length) 2795 { 2796 strlcpy(http->fields[HTTP_FIELD_TRANSFER_ENCODING], "chunked", 2797 HTTP_MAX_VALUE); 2798 http->fields[HTTP_FIELD_CONTENT_LENGTH][0] = '\0'; 2799 } 2800 else 2801 { 2802 http->fields[HTTP_FIELD_TRANSFER_ENCODING][0] = '\0'; 2803 snprintf(http->fields[HTTP_FIELD_CONTENT_LENGTH], HTTP_MAX_VALUE, 2804 CUPS_LLFMT, CUPS_LLCAST length); 2805 } 2806 } 2807 2808 2809 /* 2810 * 'httpSetTimeout()' - Set read/write timeouts and an optional callback. 2811 * 2812 * The optional timeout callback receives both the HTTP connection and a user 2813 * data pointer and must return 1 to continue or 0 to error (time) out. 2814 * 2815 * @since CUPS 1.5/macOS 10.7@ 2816 */ 2817 2818 void 2819 httpSetTimeout( 2820 http_t *http, /* I - HTTP connection */ 2821 double timeout, /* I - Number of seconds for timeout, 2822 must be greater than 0 */ 2823 http_timeout_cb_t cb, /* I - Callback function or NULL */ 2824 void *user_data) /* I - User data pointer */ 2825 { 2826 if (!http || timeout <= 0.0) 2827 return; 2828 2829 http->timeout_cb = cb; 2830 http->timeout_data = user_data; 2831 http->timeout_value = timeout; 2832 2833 if (http->fd >= 0) 2834 http_set_timeout(http->fd, timeout); 2835 2836 http_set_wait(http); 2837 } 2838 2839 2840 /* 2841 * 'httpShutdown()' - Shutdown one side of an HTTP connection. 2842 * 2843 * @since CUPS 2.0/OS 10.10@ 2844 */ 2845 2846 void 2847 httpShutdown(http_t *http) /* I - HTTP connection */ 2848 { 2849 if (!http || http->fd < 0) 2850 return; 2851 2852 #ifdef HAVE_SSL 2853 if (http->tls) 2854 _httpTLSStop(http); 2855 #endif /* HAVE_SSL */ 2856 2857 #ifdef WIN32 2858 shutdown(http->fd, SD_RECEIVE); /* Microsoft-ism... */ 2859 #else 2860 shutdown(http->fd, SHUT_RD); 2861 #endif /* WIN32 */ 2862 } 2863 2864 2865 /* 2866 * 'httpTrace()' - Send an TRACE request to the server. 2867 */ 2868 2869 int /* O - Status of call (0 = success) */ 2870 httpTrace(http_t *http, /* I - HTTP connection */ 2871 const char *uri) /* I - URI for trace */ 2872 { 2873 return (http_send(http, HTTP_STATE_TRACE, uri)); 2874 } 2875 2876 2877 /* 2878 * '_httpUpdate()' - Update the current HTTP status for incoming data. 2879 * 2880 * Note: Unlike httpUpdate(), this function does not flush pending write data 2881 * and only retrieves a single status line from the HTTP connection. 2882 */ 2883 2884 int /* O - 1 to continue, 0 to stop */ 2885 _httpUpdate(http_t *http, /* I - HTTP connection */ 2886 http_status_t *status) /* O - Current HTTP status */ 2887 { 2888 char line[32768], /* Line from connection... */ 2889 *value; /* Pointer to value on line */ 2890 http_field_t field; /* Field index */ 2891 int major, minor; /* HTTP version numbers */ 2892 2893 2894 DEBUG_printf(("_httpUpdate(http=%p, status=%p), state=%s", (void *)http, (void *)status, httpStateString(http->state))); 2895 2896 /* 2897 * Grab a single line from the connection... 2898 */ 2899 2900 if (!httpGets(line, sizeof(line), http)) 2901 { 2902 *status = HTTP_STATUS_ERROR; 2903 return (0); 2904 } 2905 2906 DEBUG_printf(("2_httpUpdate: Got \"%s\"", line)); 2907 2908 if (line[0] == '\0') 2909 { 2910 /* 2911 * Blank line means the start of the data section (if any). Return 2912 * the result code, too... 2913 * 2914 * If we get status 100 (HTTP_STATUS_CONTINUE), then we *don't* change 2915 * states. Instead, we just return HTTP_STATUS_CONTINUE to the caller and 2916 * keep on tryin'... 2917 */ 2918 2919 if (http->status == HTTP_STATUS_CONTINUE) 2920 { 2921 *status = http->status; 2922 return (0); 2923 } 2924 2925 if (http->status < HTTP_STATUS_BAD_REQUEST) 2926 http->digest_tries = 0; 2927 2928 #ifdef HAVE_SSL 2929 if (http->status == HTTP_STATUS_SWITCHING_PROTOCOLS && !http->tls) 2930 { 2931 if (_httpTLSStart(http) != 0) 2932 { 2933 httpAddrClose(NULL, http->fd); 2934 2935 *status = http->status = HTTP_STATUS_ERROR; 2936 return (0); 2937 } 2938 2939 *status = HTTP_STATUS_CONTINUE; 2940 return (0); 2941 } 2942 #endif /* HAVE_SSL */ 2943 2944 if (http_set_length(http) < 0) 2945 { 2946 DEBUG_puts("1_httpUpdate: Bad Content-Length."); 2947 http->error = EINVAL; 2948 http->status = *status = HTTP_STATUS_ERROR; 2949 return (0); 2950 } 2951 2952 switch (http->state) 2953 { 2954 case HTTP_STATE_GET : 2955 case HTTP_STATE_POST : 2956 case HTTP_STATE_POST_RECV : 2957 case HTTP_STATE_PUT : 2958 http->state ++; 2959 2960 DEBUG_printf(("1_httpUpdate: Set state to %s.", 2961 httpStateString(http->state))); 2962 2963 case HTTP_STATE_POST_SEND : 2964 case HTTP_STATE_HEAD : 2965 break; 2966 2967 default : 2968 http->state = HTTP_STATE_WAITING; 2969 2970 DEBUG_puts("1_httpUpdate: Reset state to HTTP_STATE_WAITING."); 2971 break; 2972 } 2973 2974 #ifdef HAVE_LIBZ 2975 DEBUG_puts("1_httpUpdate: Calling http_content_coding_start."); 2976 http_content_coding_start(http, 2977 httpGetField(http, HTTP_FIELD_CONTENT_ENCODING)); 2978 #endif /* HAVE_LIBZ */ 2979 2980 *status = http->status; 2981 return (0); 2982 } 2983 else if (!strncmp(line, "HTTP/", 5) && http->mode == _HTTP_MODE_CLIENT) 2984 { 2985 /* 2986 * Got the beginning of a response... 2987 */ 2988 2989 int intstatus; /* Status value as an integer */ 2990 2991 if (sscanf(line, "HTTP/%d.%d%d", &major, &minor, &intstatus) != 3) 2992 { 2993 *status = http->status = HTTP_STATUS_ERROR; 2994 return (0); 2995 } 2996 2997 httpClearFields(http); 2998 2999 http->version = (http_version_t)(major * 100 + minor); 3000 *status = http->status = (http_status_t)intstatus; 3001 } 3002 else if ((value = strchr(line, ':')) != NULL) 3003 { 3004 /* 3005 * Got a value... 3006 */ 3007 3008 *value++ = '\0'; 3009 while (_cups_isspace(*value)) 3010 value ++; 3011 3012 DEBUG_printf(("1_httpUpdate: Header %s: %s", line, value)); 3013 3014 /* 3015 * Be tolerants of servers that send unknown attribute fields... 3016 */ 3017 3018 if (!_cups_strcasecmp(line, "expect")) 3019 { 3020 /* 3021 * "Expect: 100-continue" or similar... 3022 */ 3023 3024 http->expect = (http_status_t)atoi(value); 3025 } 3026 else if (!_cups_strcasecmp(line, "cookie")) 3027 { 3028 /* 3029 * "Cookie: name=value[; name=value ...]" - replaces previous cookies... 3030 */ 3031 3032 httpSetCookie(http, value); 3033 } 3034 else if ((field = httpFieldValue(line)) != HTTP_FIELD_UNKNOWN) 3035 httpSetField(http, field, value); 3036 #ifdef DEBUG 3037 else 3038 DEBUG_printf(("1_httpUpdate: unknown field %s seen!", line)); 3039 #endif /* DEBUG */ 3040 } 3041 else 3042 { 3043 DEBUG_printf(("1_httpUpdate: Bad response line \"%s\"!", line)); 3044 http->error = EINVAL; 3045 http->status = *status = HTTP_STATUS_ERROR; 3046 return (0); 3047 } 3048 3049 return (1); 3050 } 3051 3052 3053 /* 3054 * 'httpUpdate()' - Update the current HTTP state for incoming data. 3055 */ 3056 3057 http_status_t /* O - HTTP status */ 3058 httpUpdate(http_t *http) /* I - HTTP connection */ 3059 { 3060 http_status_t status; /* Request status */ 3061 3062 3063 DEBUG_printf(("httpUpdate(http=%p), state=%s", (void *)http, httpStateString(http->state))); 3064 3065 /* 3066 * Flush pending data, if any... 3067 */ 3068 3069 if (http->wused) 3070 { 3071 DEBUG_puts("2httpUpdate: flushing buffer..."); 3072 3073 if (httpFlushWrite(http) < 0) 3074 return (HTTP_STATUS_ERROR); 3075 } 3076 3077 /* 3078 * If we haven't issued any commands, then there is nothing to "update"... 3079 */ 3080 3081 if (http->state == HTTP_STATE_WAITING) 3082 return (HTTP_STATUS_CONTINUE); 3083 3084 /* 3085 * Grab all of the lines we can from the connection... 3086 */ 3087 3088 while (_httpUpdate(http, &status)); 3089 3090 /* 3091 * See if there was an error... 3092 */ 3093 3094 if (http->error == EPIPE && http->status > HTTP_STATUS_CONTINUE) 3095 { 3096 DEBUG_printf(("1httpUpdate: Returning status %d...", http->status)); 3097 return (http->status); 3098 } 3099 3100 if (http->error) 3101 { 3102 DEBUG_printf(("1httpUpdate: socket error %d - %s", http->error, 3103 strerror(http->error))); 3104 http->status = HTTP_STATUS_ERROR; 3105 return (HTTP_STATUS_ERROR); 3106 } 3107 3108 /* 3109 * Return the current status... 3110 */ 3111 3112 return (status); 3113 } 3114 3115 3116 /* 3117 * '_httpWait()' - Wait for data available on a connection (no flush). 3118 */ 3119 3120 int /* O - 1 if data is available, 0 otherwise */ 3121 _httpWait(http_t *http, /* I - HTTP connection */ 3122 int msec, /* I - Milliseconds to wait */ 3123 int usessl) /* I - Use SSL context? */ 3124 { 3125 #ifdef HAVE_POLL 3126 struct pollfd pfd; /* Polled file descriptor */ 3127 #else 3128 fd_set input_set; /* select() input set */ 3129 struct timeval timeout; /* Timeout */ 3130 #endif /* HAVE_POLL */ 3131 int nfds; /* Result from select()/poll() */ 3132 3133 3134 DEBUG_printf(("4_httpWait(http=%p, msec=%d, usessl=%d)", (void *)http, msec, usessl)); 3135 3136 if (http->fd < 0) 3137 { 3138 DEBUG_printf(("5_httpWait: Returning 0 since fd=%d", http->fd)); 3139 return (0); 3140 } 3141 3142 /* 3143 * Check the SSL/TLS buffers for data first... 3144 */ 3145 3146 #ifdef HAVE_SSL 3147 if (http->tls && _httpTLSPending(http)) 3148 { 3149 DEBUG_puts("5_httpWait: Return 1 since there is pending TLS data."); 3150 return (1); 3151 } 3152 #endif /* HAVE_SSL */ 3153 3154 /* 3155 * Then try doing a select() or poll() to poll the socket... 3156 */ 3157 3158 #ifdef HAVE_POLL 3159 pfd.fd = http->fd; 3160 pfd.events = POLLIN; 3161 3162 do 3163 { 3164 nfds = poll(&pfd, 1, msec); 3165 } 3166 while (nfds < 0 && (errno == EINTR || errno == EAGAIN)); 3167 3168 #else 3169 do 3170 { 3171 FD_ZERO(&input_set); 3172 FD_SET(http->fd, &input_set); 3173 3174 DEBUG_printf(("6_httpWait: msec=%d, http->fd=%d", msec, http->fd)); 3175 3176 if (msec >= 0) 3177 { 3178 timeout.tv_sec = msec / 1000; 3179 timeout.tv_usec = (msec % 1000) * 1000; 3180 3181 nfds = select(http->fd + 1, &input_set, NULL, NULL, &timeout); 3182 } 3183 else 3184 nfds = select(http->fd + 1, &input_set, NULL, NULL, NULL); 3185 3186 DEBUG_printf(("6_httpWait: select() returned %d...", nfds)); 3187 } 3188 # ifdef WIN32 3189 while (nfds < 0 && (WSAGetLastError() == WSAEINTR || 3190 WSAGetLastError() == WSAEWOULDBLOCK)); 3191 # else 3192 while (nfds < 0 && (errno == EINTR || errno == EAGAIN)); 3193 # endif /* WIN32 */ 3194 #endif /* HAVE_POLL */ 3195 3196 DEBUG_printf(("5_httpWait: returning with nfds=%d, errno=%d...", nfds, 3197 errno)); 3198 3199 return (nfds > 0); 3200 } 3201 3202 3203 /* 3204 * 'httpWait()' - Wait for data available on a connection. 3205 * 3206 * @since CUPS 1.1.19/macOS 10.3@ 3207 */ 3208 3209 int /* O - 1 if data is available, 0 otherwise */ 3210 httpWait(http_t *http, /* I - HTTP connection */ 3211 int msec) /* I - Milliseconds to wait */ 3212 { 3213 /* 3214 * First see if there is data in the buffer... 3215 */ 3216 3217 DEBUG_printf(("2httpWait(http=%p, msec=%d)", (void *)http, msec)); 3218 3219 if (http == NULL) 3220 return (0); 3221 3222 if (http->used) 3223 { 3224 DEBUG_puts("3httpWait: Returning 1 since there is buffered data ready."); 3225 return (1); 3226 } 3227 3228 #ifdef HAVE_LIBZ 3229 if (http->coding >= _HTTP_CODING_GUNZIP && http->stream.avail_in > 0) 3230 { 3231 DEBUG_puts("3httpWait: Returning 1 since there is buffered data ready."); 3232 return (1); 3233 } 3234 #endif /* HAVE_LIBZ */ 3235 3236 /* 3237 * Flush pending data, if any... 3238 */ 3239 3240 if (http->wused) 3241 { 3242 DEBUG_puts("3httpWait: Flushing write buffer."); 3243 3244 if (httpFlushWrite(http) < 0) 3245 return (0); 3246 } 3247 3248 /* 3249 * If not, check the SSL/TLS buffers and do a select() on the connection... 3250 */ 3251 3252 return (_httpWait(http, msec, 1)); 3253 } 3254 3255 3256 /* 3257 * 'httpWrite()' - Write data to a HTTP connection. 3258 * 3259 * This function is deprecated. Use the httpWrite2() function which can 3260 * write more than 2GB of data. 3261 * 3262 * @deprecated@ 3263 */ 3264 3265 int /* O - Number of bytes written */ 3266 httpWrite(http_t *http, /* I - HTTP connection */ 3267 const char *buffer, /* I - Buffer for data */ 3268 int length) /* I - Number of bytes to write */ 3269 { 3270 return ((int)httpWrite2(http, buffer, (size_t)length)); 3271 } 3272 3273 3274 /* 3275 * 'httpWrite2()' - Write data to a HTTP connection. 3276 * 3277 * @since CUPS 1.2/macOS 10.5@ 3278 */ 3279 3280 ssize_t /* O - Number of bytes written */ 3281 httpWrite2(http_t *http, /* I - HTTP connection */ 3282 const char *buffer, /* I - Buffer for data */ 3283 size_t length) /* I - Number of bytes to write */ 3284 { 3285 ssize_t bytes; /* Bytes written */ 3286 3287 3288 DEBUG_printf(("httpWrite2(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); 3289 3290 /* 3291 * Range check input... 3292 */ 3293 3294 if (!http || !buffer) 3295 { 3296 DEBUG_puts("1httpWrite2: Returning -1 due to bad input."); 3297 return (-1); 3298 } 3299 3300 /* 3301 * Mark activity on the connection... 3302 */ 3303 3304 http->activity = time(NULL); 3305 3306 /* 3307 * Buffer small writes for better performance... 3308 */ 3309 3310 #ifdef HAVE_LIBZ 3311 if (http->coding == _HTTP_CODING_GZIP || http->coding == _HTTP_CODING_DEFLATE) 3312 { 3313 DEBUG_printf(("1httpWrite2: http->coding=%d", http->coding)); 3314 3315 if (length == 0) 3316 { 3317 http_content_coding_finish(http); 3318 bytes = 0; 3319 } 3320 else 3321 { 3322 size_t slen; /* Bytes to write */ 3323 ssize_t sret; /* Bytes written */ 3324 3325 http->stream.next_in = (Bytef *)buffer; 3326 http->stream.avail_in = (uInt)length; 3327 3328 while (deflate(&(http->stream), Z_NO_FLUSH) == Z_OK) 3329 { 3330 DEBUG_printf(("1httpWrite2: avail_out=%d", http->stream.avail_out)); 3331 3332 if (http->stream.avail_out > 0) 3333 continue; 3334 3335 slen = _HTTP_MAX_SBUFFER - http->stream.avail_out; 3336 3337 DEBUG_printf(("1httpWrite2: Writing intermediate chunk, len=%d", (int)slen)); 3338 3339 if (slen > 0 && http->data_encoding == HTTP_ENCODING_CHUNKED) 3340 sret = http_write_chunk(http, (char *)http->sbuffer, slen); 3341 else if (slen > 0) 3342 sret = http_write(http, (char *)http->sbuffer, slen); 3343 else 3344 sret = 0; 3345 3346 if (sret < 0) 3347 { 3348 DEBUG_puts("1httpWrite2: Unable to write, returning -1."); 3349 return (-1); 3350 } 3351 3352 http->stream.next_out = (Bytef *)http->sbuffer; 3353 http->stream.avail_out = (uInt)_HTTP_MAX_SBUFFER; 3354 } 3355 3356 bytes = (ssize_t)length; 3357 } 3358 } 3359 else 3360 #endif /* HAVE_LIBZ */ 3361 if (length > 0) 3362 { 3363 if (http->wused && (length + (size_t)http->wused) > sizeof(http->wbuffer)) 3364 { 3365 DEBUG_printf(("2httpWrite2: Flushing buffer (wused=%d, length=" 3366 CUPS_LLFMT ")", http->wused, CUPS_LLCAST length)); 3367 3368 httpFlushWrite(http); 3369 } 3370 3371 if ((length + (size_t)http->wused) <= sizeof(http->wbuffer) && length < sizeof(http->wbuffer)) 3372 { 3373 /* 3374 * Write to buffer... 3375 */ 3376 3377 DEBUG_printf(("2httpWrite2: Copying " CUPS_LLFMT " bytes to wbuffer...", 3378 CUPS_LLCAST length)); 3379 3380 memcpy(http->wbuffer + http->wused, buffer, length); 3381 http->wused += (int)length; 3382 bytes = (ssize_t)length; 3383 } 3384 else 3385 { 3386 /* 3387 * Otherwise write the data directly... 3388 */ 3389 3390 DEBUG_printf(("2httpWrite2: Writing " CUPS_LLFMT " bytes to socket...", 3391 CUPS_LLCAST length)); 3392 3393 if (http->data_encoding == HTTP_ENCODING_CHUNKED) 3394 bytes = (ssize_t)http_write_chunk(http, buffer, length); 3395 else 3396 bytes = (ssize_t)http_write(http, buffer, length); 3397 3398 DEBUG_printf(("2httpWrite2: Wrote " CUPS_LLFMT " bytes...", 3399 CUPS_LLCAST bytes)); 3400 } 3401 3402 if (http->data_encoding == HTTP_ENCODING_LENGTH) 3403 http->data_remaining -= bytes; 3404 } 3405 else 3406 bytes = 0; 3407 3408 /* 3409 * Handle end-of-request processing... 3410 */ 3411 3412 if ((http->data_encoding == HTTP_ENCODING_CHUNKED && length == 0) || 3413 (http->data_encoding == HTTP_ENCODING_LENGTH && http->data_remaining == 0)) 3414 { 3415 /* 3416 * Finished with the transfer; unless we are sending POST or PUT 3417 * data, go idle... 3418 */ 3419 3420 #ifdef HAVE_LIBZ 3421 if (http->coding == _HTTP_CODING_GZIP || http->coding == _HTTP_CODING_DEFLATE) 3422 http_content_coding_finish(http); 3423 #endif /* HAVE_LIBZ */ 3424 3425 if (http->wused) 3426 { 3427 if (httpFlushWrite(http) < 0) 3428 return (-1); 3429 } 3430 3431 if (http->data_encoding == HTTP_ENCODING_CHUNKED) 3432 { 3433 /* 3434 * Send a 0-length chunk at the end of the request... 3435 */ 3436 3437 http_write(http, "0\r\n\r\n", 5); 3438 3439 /* 3440 * Reset the data state... 3441 */ 3442 3443 http->data_encoding = HTTP_ENCODING_FIELDS; 3444 http->data_remaining = 0; 3445 } 3446 3447 if (http->state == HTTP_STATE_POST_RECV) 3448 http->state ++; 3449 else if (http->state == HTTP_STATE_POST_SEND || 3450 http->state == HTTP_STATE_GET_SEND) 3451 http->state = HTTP_STATE_WAITING; 3452 else 3453 http->state = HTTP_STATE_STATUS; 3454 3455 DEBUG_printf(("2httpWrite2: Changed state to %s.", 3456 httpStateString(http->state))); 3457 } 3458 3459 DEBUG_printf(("1httpWrite2: Returning " CUPS_LLFMT ".", CUPS_LLCAST bytes)); 3460 3461 return (bytes); 3462 } 3463 3464 3465 /* 3466 * 'httpWriteResponse()' - Write a HTTP response to a client connection. 3467 * 3468 * @since CUPS 1.7/macOS 10.9@ 3469 */ 3470 3471 int /* O - 0 on success, -1 on error */ 3472 httpWriteResponse(http_t *http, /* I - HTTP connection */ 3473 http_status_t status) /* I - Status code */ 3474 { 3475 http_encoding_t old_encoding; /* Old data_encoding value */ 3476 off_t old_remaining; /* Old data_remaining value */ 3477 3478 3479 /* 3480 * Range check input... 3481 */ 3482 3483 DEBUG_printf(("httpWriteResponse(http=%p, status=%d)", (void *)http, status)); 3484 3485 if (!http || status < HTTP_STATUS_CONTINUE) 3486 { 3487 DEBUG_puts("1httpWriteResponse: Bad input."); 3488 return (-1); 3489 } 3490 3491 /* 3492 * Set the various standard fields if they aren't already... 3493 */ 3494 3495 if (!http->fields[HTTP_FIELD_DATE][0]) 3496 httpSetField(http, HTTP_FIELD_DATE, httpGetDateString(time(NULL))); 3497 3498 if (status >= HTTP_STATUS_BAD_REQUEST && http->keep_alive) 3499 { 3500 http->keep_alive = HTTP_KEEPALIVE_OFF; 3501 httpSetField(http, HTTP_FIELD_KEEP_ALIVE, ""); 3502 } 3503 3504 if (http->version == HTTP_VERSION_1_1) 3505 { 3506 if (!http->fields[HTTP_FIELD_CONNECTION][0]) 3507 { 3508 if (http->keep_alive) 3509 httpSetField(http, HTTP_FIELD_CONNECTION, "Keep-Alive"); 3510 else 3511 httpSetField(http, HTTP_FIELD_CONNECTION, "close"); 3512 } 3513 3514 if (http->keep_alive && !http->fields[HTTP_FIELD_KEEP_ALIVE][0]) 3515 httpSetField(http, HTTP_FIELD_KEEP_ALIVE, "timeout=10"); 3516 } 3517 3518 #ifdef HAVE_SSL 3519 if (status == HTTP_STATUS_UPGRADE_REQUIRED || 3520 status == HTTP_STATUS_SWITCHING_PROTOCOLS) 3521 { 3522 if (!http->fields[HTTP_FIELD_CONNECTION][0]) 3523 httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade"); 3524 3525 if (!http->fields[HTTP_FIELD_UPGRADE][0]) 3526 httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.2,TLS/1.1,TLS/1.0"); 3527 3528 if (!http->fields[HTTP_FIELD_CONTENT_LENGTH][0]) 3529 httpSetField(http, HTTP_FIELD_CONTENT_LENGTH, "0"); 3530 } 3531 #endif /* HAVE_SSL */ 3532 3533 if (!http->server) 3534 httpSetField(http, HTTP_FIELD_SERVER, 3535 http->default_server ? http->default_server : CUPS_MINIMAL); 3536 3537 /* 3538 * Set the Accept-Encoding field if it isn't already... 3539 */ 3540 3541 if (!http->accept_encoding) 3542 httpSetField(http, HTTP_FIELD_ACCEPT_ENCODING, 3543 http->default_accept_encoding ? http->default_accept_encoding : 3544 #ifdef HAVE_LIBZ 3545 "gzip, deflate, identity"); 3546 #else 3547 "identity"); 3548 #endif /* HAVE_LIBZ */ 3549 3550 /* 3551 * Send the response header... 3552 */ 3553 3554 old_encoding = http->data_encoding; 3555 old_remaining = http->data_remaining; 3556 http->data_encoding = HTTP_ENCODING_FIELDS; 3557 3558 if (httpPrintf(http, "HTTP/%d.%d %d %s\r\n", http->version / 100, 3559 http->version % 100, (int)status, httpStatus(status)) < 0) 3560 { 3561 http->status = HTTP_STATUS_ERROR; 3562 return (-1); 3563 } 3564 3565 if (status != HTTP_STATUS_CONTINUE) 3566 { 3567 /* 3568 * 100 Continue doesn't have the rest of the response headers... 3569 */ 3570 3571 int i; /* Looping var */ 3572 const char *value; /* Field value */ 3573 3574 for (i = 0; i < HTTP_FIELD_MAX; i ++) 3575 { 3576 if ((value = httpGetField(http, i)) != NULL && *value) 3577 { 3578 if (httpPrintf(http, "%s: %s\r\n", http_fields[i], value) < 1) 3579 { 3580 http->status = HTTP_STATUS_ERROR; 3581 return (-1); 3582 } 3583 } 3584 } 3585 3586 if (http->cookie) 3587 { 3588 if (strchr(http->cookie, ';')) 3589 { 3590 if (httpPrintf(http, "Set-Cookie: %s\r\n", http->cookie) < 1) 3591 { 3592 http->status = HTTP_STATUS_ERROR; 3593 return (-1); 3594 } 3595 } 3596 else if (httpPrintf(http, "Set-Cookie: %s; path=/; httponly;%s\r\n", http->cookie, http->tls ? " secure;" : "") < 1) 3597 { 3598 http->status = HTTP_STATUS_ERROR; 3599 return (-1); 3600 } 3601 } 3602 3603 /* 3604 * "Click-jacking" defense (STR #4492)... 3605 */ 3606 3607 if (httpPrintf(http, "X-Frame-Options: DENY\r\n" 3608 "Content-Security-Policy: frame-ancestors 'none'\r\n") < 1) 3609 { 3610 http->status = HTTP_STATUS_ERROR; 3611 return (-1); 3612 } 3613 } 3614 3615 if (httpWrite2(http, "\r\n", 2) < 2) 3616 { 3617 http->status = HTTP_STATUS_ERROR; 3618 return (-1); 3619 } 3620 3621 if (httpFlushWrite(http) < 0) 3622 { 3623 http->status = HTTP_STATUS_ERROR; 3624 return (-1); 3625 } 3626 3627 if (status == HTTP_STATUS_CONTINUE || 3628 status == HTTP_STATUS_SWITCHING_PROTOCOLS) 3629 { 3630 /* 3631 * Restore the old data_encoding and data_length values... 3632 */ 3633 3634 http->data_encoding = old_encoding; 3635 http->data_remaining = old_remaining; 3636 3637 if (old_remaining <= INT_MAX) 3638 http->_data_remaining = (int)old_remaining; 3639 else 3640 http->_data_remaining = INT_MAX; 3641 } 3642 else if (http->state == HTTP_STATE_OPTIONS || 3643 http->state == HTTP_STATE_HEAD || 3644 http->state == HTTP_STATE_PUT || 3645 http->state == HTTP_STATE_TRACE || 3646 http->state == HTTP_STATE_CONNECT || 3647 http->state == HTTP_STATE_STATUS) 3648 { 3649 DEBUG_printf(("1httpWriteResponse: Resetting state to HTTP_STATE_WAITING, " 3650 "was %s.", httpStateString(http->state))); 3651 http->state = HTTP_STATE_WAITING; 3652 } 3653 else 3654 { 3655 /* 3656 * Force data_encoding and data_length to be set according to the response 3657 * headers... 3658 */ 3659 3660 http_set_length(http); 3661 3662 if (http->data_encoding == HTTP_ENCODING_LENGTH && http->data_remaining == 0) 3663 { 3664 DEBUG_printf(("1httpWriteResponse: Resetting state to HTTP_STATE_WAITING, " 3665 "was %s.", httpStateString(http->state))); 3666 http->state = HTTP_STATE_WAITING; 3667 return (0); 3668 } 3669 3670 if (http->state == HTTP_STATE_POST_RECV || http->state == HTTP_STATE_GET) 3671 http->state ++; 3672 3673 #ifdef HAVE_LIBZ 3674 /* 3675 * Then start any content encoding... 3676 */ 3677 3678 DEBUG_puts("1httpWriteResponse: Calling http_content_coding_start."); 3679 http_content_coding_start(http, 3680 httpGetField(http, HTTP_FIELD_CONTENT_ENCODING)); 3681 #endif /* HAVE_LIBZ */ 3682 3683 } 3684 3685 return (0); 3686 } 3687 3688 3689 #ifdef HAVE_LIBZ 3690 /* 3691 * 'http_content_coding_finish()' - Finish doing any content encoding. 3692 */ 3693 3694 static void 3695 http_content_coding_finish( 3696 http_t *http) /* I - HTTP connection */ 3697 { 3698 int zerr; /* Compression status */ 3699 Byte dummy[1]; /* Dummy read buffer */ 3700 size_t bytes; /* Number of bytes to write */ 3701 3702 3703 DEBUG_printf(("http_content_coding_finish(http=%p)", (void *)http)); 3704 DEBUG_printf(("1http_content_coding_finishing: http->coding=%d", http->coding)); 3705 3706 switch (http->coding) 3707 { 3708 case _HTTP_CODING_DEFLATE : 3709 case _HTTP_CODING_GZIP : 3710 http->stream.next_in = dummy; 3711 http->stream.avail_in = 0; 3712 3713 do 3714 { 3715 zerr = deflate(&(http->stream), Z_FINISH); 3716 bytes = _HTTP_MAX_SBUFFER - http->stream.avail_out; 3717 3718 if (bytes > 0) 3719 { 3720 DEBUG_printf(("1http_content_coding_finish: Writing trailing chunk, len=%d", (int)bytes)); 3721 3722 if (http->data_encoding == HTTP_ENCODING_CHUNKED) 3723 http_write_chunk(http, (char *)http->sbuffer, bytes); 3724 else 3725 http_write(http, (char *)http->sbuffer, bytes); 3726 } 3727 3728 http->stream.next_out = (Bytef *)http->sbuffer; 3729 http->stream.avail_out = (uInt)_HTTP_MAX_SBUFFER; 3730 } 3731 while (zerr == Z_OK); 3732 3733 deflateEnd(&(http->stream)); 3734 3735 free(http->sbuffer); 3736 http->sbuffer = NULL; 3737 3738 if (http->wused) 3739 httpFlushWrite(http); 3740 break; 3741 3742 case _HTTP_CODING_INFLATE : 3743 case _HTTP_CODING_GUNZIP : 3744 inflateEnd(&(http->stream)); 3745 free(http->sbuffer); 3746 http->sbuffer = NULL; 3747 break; 3748 3749 default : 3750 break; 3751 } 3752 3753 http->coding = _HTTP_CODING_IDENTITY; 3754 } 3755 3756 3757 /* 3758 * 'http_content_coding_start()' - Start doing content encoding. 3759 */ 3760 3761 static void 3762 http_content_coding_start( 3763 http_t *http, /* I - HTTP connection */ 3764 const char *value) /* I - Value of Content-Encoding */ 3765 { 3766 int zerr; /* Error/status */ 3767 _http_coding_t coding; /* Content coding value */ 3768 3769 3770 DEBUG_printf(("http_content_coding_start(http=%p, value=\"%s\")", (void *)http, value)); 3771 3772 if (http->coding != _HTTP_CODING_IDENTITY) 3773 { 3774 DEBUG_printf(("1http_content_coding_start: http->coding already %d.", 3775 http->coding)); 3776 return; 3777 } 3778 else if (!strcmp(value, "x-gzip") || !strcmp(value, "gzip")) 3779 { 3780 if (http->state == HTTP_STATE_GET_SEND || 3781 http->state == HTTP_STATE_POST_SEND) 3782 coding = http->mode == _HTTP_MODE_SERVER ? _HTTP_CODING_GZIP : 3783 _HTTP_CODING_GUNZIP; 3784 else if (http->state == HTTP_STATE_POST_RECV || 3785 http->state == HTTP_STATE_PUT_RECV) 3786 coding = http->mode == _HTTP_MODE_CLIENT ? _HTTP_CODING_GZIP : 3787 _HTTP_CODING_GUNZIP; 3788 else 3789 { 3790 DEBUG_puts("1http_content_coding_start: Not doing content coding."); 3791 return; 3792 } 3793 } 3794 else if (!strcmp(value, "x-deflate") || !strcmp(value, "deflate")) 3795 { 3796 if (http->state == HTTP_STATE_GET_SEND || 3797 http->state == HTTP_STATE_POST_SEND) 3798 coding = http->mode == _HTTP_MODE_SERVER ? _HTTP_CODING_DEFLATE : 3799 _HTTP_CODING_INFLATE; 3800 else if (http->state == HTTP_STATE_POST_RECV || 3801 http->state == HTTP_STATE_PUT_RECV) 3802 coding = http->mode == _HTTP_MODE_CLIENT ? _HTTP_CODING_DEFLATE : 3803 _HTTP_CODING_INFLATE; 3804 else 3805 { 3806 DEBUG_puts("1http_content_coding_start: Not doing content coding."); 3807 return; 3808 } 3809 } 3810 else 3811 { 3812 DEBUG_puts("1http_content_coding_start: Not doing content coding."); 3813 return; 3814 } 3815 3816 memset(&(http->stream), 0, sizeof(http->stream)); 3817 3818 switch (coding) 3819 { 3820 case _HTTP_CODING_DEFLATE : 3821 case _HTTP_CODING_GZIP : 3822 if (http->wused) 3823 httpFlushWrite(http); 3824 3825 if ((http->sbuffer = malloc(_HTTP_MAX_SBUFFER)) == NULL) 3826 { 3827 http->status = HTTP_STATUS_ERROR; 3828 http->error = errno; 3829 return; 3830 } 3831 3832 /* 3833 * Window size for compression is 11 bits - optimal based on PWG Raster 3834 * sample files on pwg.org. -11 is raw deflate, 27 is gzip, per ZLIB 3835 * documentation. 3836 */ 3837 3838 if ((zerr = deflateInit2(&(http->stream), Z_DEFAULT_COMPRESSION, 3839 Z_DEFLATED, 3840 coding == _HTTP_CODING_DEFLATE ? -11 : 27, 7, 3841 Z_DEFAULT_STRATEGY)) < Z_OK) 3842 { 3843 http->status = HTTP_STATUS_ERROR; 3844 http->error = zerr == Z_MEM_ERROR ? ENOMEM : EINVAL; 3845 return; 3846 } 3847 3848 http->stream.next_out = (Bytef *)http->sbuffer; 3849 http->stream.avail_out = (uInt)_HTTP_MAX_SBUFFER; 3850 break; 3851 3852 case _HTTP_CODING_INFLATE : 3853 case _HTTP_CODING_GUNZIP : 3854 if ((http->sbuffer = malloc(_HTTP_MAX_SBUFFER)) == NULL) 3855 { 3856 http->status = HTTP_STATUS_ERROR; 3857 http->error = errno; 3858 return; 3859 } 3860 3861 /* 3862 * Window size for decompression is up to 15 bits (maximum supported). 3863 * -15 is raw inflate, 31 is gunzip, per ZLIB documentation. 3864 */ 3865 3866 if ((zerr = inflateInit2(&(http->stream), 3867 coding == _HTTP_CODING_INFLATE ? -15 : 31)) 3868 < Z_OK) 3869 { 3870 free(http->sbuffer); 3871 http->sbuffer = NULL; 3872 http->status = HTTP_STATUS_ERROR; 3873 http->error = zerr == Z_MEM_ERROR ? ENOMEM : EINVAL; 3874 return; 3875 } 3876 3877 http->stream.avail_in = 0; 3878 http->stream.next_in = http->sbuffer; 3879 break; 3880 3881 default : 3882 break; 3883 } 3884 3885 http->coding = coding; 3886 3887 DEBUG_printf(("1http_content_coding_start: http->coding now %d.", 3888 http->coding)); 3889 } 3890 #endif /* HAVE_LIBZ */ 3891 3892 3893 /* 3894 * 'http_create()' - Create an unconnected HTTP connection. 3895 */ 3896 3897 static http_t * /* O - HTTP connection */ 3898 http_create( 3899 const char *host, /* I - Hostname */ 3900 int port, /* I - Port number */ 3901 http_addrlist_t *addrlist, /* I - Address list or NULL */ 3902 int family, /* I - Address family or AF_UNSPEC */ 3903 http_encryption_t encryption, /* I - Encryption to use */ 3904 int blocking, /* I - 1 for blocking mode */ 3905 _http_mode_t mode) /* I - _HTTP_MODE_CLIENT or _SERVER */ 3906 { 3907 http_t *http; /* New HTTP connection */ 3908 char service[255]; /* Service name */ 3909 http_addrlist_t *myaddrlist = NULL; /* My address list */ 3910 3911 3912 DEBUG_printf(("4http_create(host=\"%s\", port=%d, addrlist=%p, family=%d, encryption=%d, blocking=%d, mode=%d)", host, port, (void *)addrlist, family, encryption, blocking, mode)); 3913 3914 if (!host && mode == _HTTP_MODE_CLIENT) 3915 return (NULL); 3916 3917 httpInitialize(); 3918 3919 /* 3920 * Lookup the host... 3921 */ 3922 3923 if (addrlist) 3924 { 3925 myaddrlist = httpAddrCopyList(addrlist); 3926 } 3927 else 3928 { 3929 snprintf(service, sizeof(service), "%d", port); 3930 3931 myaddrlist = httpAddrGetList(host, family, service); 3932 } 3933 3934 if (!myaddrlist) 3935 return (NULL); 3936 3937 /* 3938 * Allocate memory for the structure... 3939 */ 3940 3941 if ((http = calloc(sizeof(http_t), 1)) == NULL) 3942 { 3943 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); 3944 httpAddrFreeList(addrlist); 3945 return (NULL); 3946 } 3947 3948 /* 3949 * Initialize the HTTP data... 3950 */ 3951 3952 http->mode = mode; 3953 http->activity = time(NULL); 3954 http->addrlist = myaddrlist; 3955 http->blocking = blocking; 3956 http->fd = -1; 3957 #ifdef HAVE_GSSAPI 3958 http->gssctx = GSS_C_NO_CONTEXT; 3959 http->gssname = GSS_C_NO_NAME; 3960 #endif /* HAVE_GSSAPI */ 3961 http->status = HTTP_STATUS_CONTINUE; 3962 http->version = HTTP_VERSION_1_1; 3963 3964 if (host) 3965 strlcpy(http->hostname, host, sizeof(http->hostname)); 3966 3967 if (port == 443) /* Always use encryption for https */ 3968 http->encryption = HTTP_ENCRYPTION_ALWAYS; 3969 else 3970 http->encryption = encryption; 3971 3972 http_set_wait(http); 3973 3974 /* 3975 * Return the new structure... 3976 */ 3977 3978 return (http); 3979 } 3980 3981 3982 #ifdef DEBUG 3983 /* 3984 * 'http_debug_hex()' - Do a hex dump of a buffer. 3985 */ 3986 3987 static void 3988 http_debug_hex(const char *prefix, /* I - Prefix for line */ 3989 const char *buffer, /* I - Buffer to dump */ 3990 int bytes) /* I - Bytes to dump */ 3991 { 3992 int i, j, /* Looping vars */ 3993 ch; /* Current character */ 3994 char line[255], /* Line buffer */ 3995 *start, /* Start of line after prefix */ 3996 *ptr; /* Pointer into line */ 3997 3998 3999 if (_cups_debug_fd < 0 || _cups_debug_level < 6) 4000 return; 4001 4002 DEBUG_printf(("6%s: %d bytes:", prefix, bytes)); 4003 4004 snprintf(line, sizeof(line), "6%s: ", prefix); 4005 start = line + strlen(line); 4006 4007 for (i = 0; i < bytes; i += 16) 4008 { 4009 for (j = 0, ptr = start; j < 16 && (i + j) < bytes; j ++, ptr += 2) 4010 snprintf(ptr, 3, "%02X", buffer[i + j] & 255); 4011 4012 while (j < 16) 4013 { 4014 memcpy(ptr, " ", 3); 4015 ptr += 2; 4016 j ++; 4017 } 4018 4019 memcpy(ptr, " ", 3); 4020 ptr += 2; 4021 4022 for (j = 0; j < 16 && (i + j) < bytes; j ++) 4023 { 4024 ch = buffer[i + j] & 255; 4025 4026 if (ch < ' ' || ch >= 127) 4027 ch = '.'; 4028 4029 *ptr++ = (char)ch; 4030 } 4031 4032 *ptr = '\0'; 4033 DEBUG_puts(line); 4034 } 4035 } 4036 #endif /* DEBUG */ 4037 4038 4039 /* 4040 * 'http_read()' - Read a buffer from a HTTP connection. 4041 * 4042 * This function does the low-level read from the socket, retrying and timing 4043 * out as needed. 4044 */ 4045 4046 static ssize_t /* O - Number of bytes read or -1 on error */ 4047 http_read(http_t *http, /* I - HTTP connection */ 4048 char *buffer, /* I - Buffer */ 4049 size_t length) /* I - Maximum bytes to read */ 4050 { 4051 ssize_t bytes; /* Bytes read */ 4052 4053 4054 DEBUG_printf(("http_read(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); 4055 4056 if (!http->blocking) 4057 { 4058 while (!httpWait(http, http->wait_value)) 4059 { 4060 if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) 4061 continue; 4062 4063 DEBUG_puts("2http_read: Timeout."); 4064 return (0); 4065 } 4066 } 4067 4068 DEBUG_printf(("2http_read: Reading %d bytes into buffer.", (int)length)); 4069 4070 do 4071 { 4072 #ifdef HAVE_SSL 4073 if (http->tls) 4074 bytes = _httpTLSRead(http, buffer, (int)length); 4075 else 4076 #endif /* HAVE_SSL */ 4077 bytes = recv(http->fd, buffer, length, 0); 4078 4079 if (bytes < 0) 4080 { 4081 #ifdef WIN32 4082 if (WSAGetLastError() != WSAEINTR) 4083 { 4084 http->error = WSAGetLastError(); 4085 return (-1); 4086 } 4087 else if (WSAGetLastError() == WSAEWOULDBLOCK) 4088 { 4089 if (!http->timeout_cb || 4090 !(*http->timeout_cb)(http, http->timeout_data)) 4091 { 4092 http->error = WSAEWOULDBLOCK; 4093 return (-1); 4094 } 4095 } 4096 #else 4097 DEBUG_printf(("2http_read: %s", strerror(errno))); 4098 4099 if (errno == EWOULDBLOCK || errno == EAGAIN) 4100 { 4101 if (http->timeout_cb && !(*http->timeout_cb)(http, http->timeout_data)) 4102 { 4103 http->error = errno; 4104 return (-1); 4105 } 4106 else if (!http->timeout_cb && errno != EAGAIN) 4107 { 4108 http->error = errno; 4109 return (-1); 4110 } 4111 } 4112 else if (errno != EINTR) 4113 { 4114 http->error = errno; 4115 return (-1); 4116 } 4117 #endif /* WIN32 */ 4118 } 4119 } 4120 while (bytes < 0); 4121 4122 DEBUG_printf(("2http_read: Read " CUPS_LLFMT " bytes into buffer.", 4123 CUPS_LLCAST bytes)); 4124 #ifdef DEBUG 4125 if (bytes > 0) 4126 http_debug_hex("http_read", buffer, (int)bytes); 4127 #endif /* DEBUG */ 4128 4129 if (bytes < 0) 4130 { 4131 #ifdef WIN32 4132 if (WSAGetLastError() == WSAEINTR) 4133 bytes = 0; 4134 else 4135 http->error = WSAGetLastError(); 4136 #else 4137 if (errno == EINTR || (errno == EAGAIN && !http->timeout_cb)) 4138 bytes = 0; 4139 else 4140 http->error = errno; 4141 #endif /* WIN32 */ 4142 } 4143 else if (bytes == 0) 4144 { 4145 http->error = EPIPE; 4146 return (0); 4147 } 4148 4149 return (bytes); 4150 } 4151 4152 4153 /* 4154 * 'http_read_buffered()' - Do a buffered read from a HTTP connection. 4155 * 4156 * This function reads data from the HTTP buffer or from the socket, as needed. 4157 */ 4158 4159 static ssize_t /* O - Number of bytes read or -1 on error */ 4160 http_read_buffered(http_t *http, /* I - HTTP connection */ 4161 char *buffer, /* I - Buffer */ 4162 size_t length) /* I - Maximum bytes to read */ 4163 { 4164 ssize_t bytes; /* Bytes read */ 4165 4166 4167 DEBUG_printf(("http_read_buffered(http=%p, buffer=%p, length=" CUPS_LLFMT ") used=%d", (void *)http, (void *)buffer, CUPS_LLCAST length, http->used)); 4168 4169 if (http->used > 0) 4170 { 4171 if (length > (size_t)http->used) 4172 bytes = (ssize_t)http->used; 4173 else 4174 bytes = (ssize_t)length; 4175 4176 DEBUG_printf(("2http_read: Grabbing %d bytes from input buffer.", 4177 (int)bytes)); 4178 4179 memcpy(buffer, http->buffer, (size_t)bytes); 4180 http->used -= (int)bytes; 4181 4182 if (http->used > 0) 4183 memmove(http->buffer, http->buffer + bytes, (size_t)http->used); 4184 } 4185 else 4186 bytes = http_read(http, buffer, length); 4187 4188 return (bytes); 4189 } 4190 4191 4192 /* 4193 * 'http_read_chunk()' - Read a chunk from a HTTP connection. 4194 * 4195 * This function reads and validates the chunk length, then does a buffered read 4196 * returning the number of bytes placed in the buffer. 4197 */ 4198 4199 static ssize_t /* O - Number of bytes read or -1 on error */ 4200 http_read_chunk(http_t *http, /* I - HTTP connection */ 4201 char *buffer, /* I - Buffer */ 4202 size_t length) /* I - Maximum bytes to read */ 4203 { 4204 DEBUG_printf(("http_read_chunk(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); 4205 4206 if (http->data_remaining <= 0) 4207 { 4208 char len[32]; /* Length string */ 4209 4210 if (!httpGets(len, sizeof(len), http)) 4211 { 4212 DEBUG_puts("1http_read_chunk: Could not get chunk length."); 4213 return (0); 4214 } 4215 4216 if (!len[0]) 4217 { 4218 DEBUG_puts("1http_read_chunk: Blank chunk length, trying again..."); 4219 if (!httpGets(len, sizeof(len), http)) 4220 { 4221 DEBUG_puts("1http_read_chunk: Could not get chunk length."); 4222 return (0); 4223 } 4224 } 4225 4226 http->data_remaining = strtoll(len, NULL, 16); 4227 4228 if (http->data_remaining < 0) 4229 { 4230 DEBUG_printf(("1http_read_chunk: Negative chunk length \"%s\" (" 4231 CUPS_LLFMT ")", len, CUPS_LLCAST http->data_remaining)); 4232 return (0); 4233 } 4234 4235 DEBUG_printf(("2http_read_chunk: Got chunk length \"%s\" (" CUPS_LLFMT ")", 4236 len, CUPS_LLCAST http->data_remaining)); 4237 4238 if (http->data_remaining == 0) 4239 { 4240 /* 4241 * 0-length chunk, grab trailing blank line... 4242 */ 4243 4244 httpGets(len, sizeof(len), http); 4245 } 4246 } 4247 4248 DEBUG_printf(("2http_read_chunk: data_remaining=" CUPS_LLFMT, 4249 CUPS_LLCAST http->data_remaining)); 4250 4251 if (http->data_remaining <= 0) 4252 return (0); 4253 else if (length > (size_t)http->data_remaining) 4254 length = (size_t)http->data_remaining; 4255 4256 return (http_read_buffered(http, buffer, length)); 4257 } 4258 4259 4260 /* 4261 * 'http_send()' - Send a request with all fields and the trailing blank line. 4262 */ 4263 4264 static int /* O - 0 on success, non-zero on error */ 4265 http_send(http_t *http, /* I - HTTP connection */ 4266 http_state_t request, /* I - Request code */ 4267 const char *uri) /* I - URI */ 4268 { 4269 int i; /* Looping var */ 4270 char buf[1024]; /* Encoded URI buffer */ 4271 const char *value; /* Field value */ 4272 static const char * const codes[] = /* Request code strings */ 4273 { 4274 NULL, 4275 "OPTIONS", 4276 "GET", 4277 NULL, 4278 "HEAD", 4279 "POST", 4280 NULL, 4281 NULL, 4282 "PUT", 4283 NULL, 4284 "DELETE", 4285 "TRACE", 4286 "CLOSE", 4287 NULL, 4288 NULL 4289 }; 4290 4291 4292 DEBUG_printf(("4http_send(http=%p, request=HTTP_%s, uri=\"%s\")", (void *)http, codes[request], uri)); 4293 4294 if (http == NULL || uri == NULL) 4295 return (-1); 4296 4297 /* 4298 * Set the User-Agent field if it isn't already... 4299 */ 4300 4301 if (!http->fields[HTTP_FIELD_USER_AGENT][0]) 4302 { 4303 if (http->default_user_agent) 4304 httpSetField(http, HTTP_FIELD_USER_AGENT, http->default_user_agent); 4305 else 4306 httpSetField(http, HTTP_FIELD_USER_AGENT, cupsUserAgent()); 4307 } 4308 4309 /* 4310 * Set the Accept-Encoding field if it isn't already... 4311 */ 4312 4313 if (!http->accept_encoding && http->default_accept_encoding) 4314 httpSetField(http, HTTP_FIELD_ACCEPT_ENCODING, 4315 http->default_accept_encoding); 4316 4317 /* 4318 * Encode the URI as needed... 4319 */ 4320 4321 _httpEncodeURI(buf, uri, sizeof(buf)); 4322 4323 /* 4324 * See if we had an error the last time around; if so, reconnect... 4325 */ 4326 4327 if (http->fd < 0 || http->status == HTTP_STATUS_ERROR || 4328 http->status >= HTTP_STATUS_BAD_REQUEST) 4329 { 4330 DEBUG_printf(("5http_send: Reconnecting, fd=%d, status=%d, tls_upgrade=%d", 4331 http->fd, http->status, http->tls_upgrade)); 4332 4333 if (httpReconnect2(http, 30000, NULL)) 4334 return (-1); 4335 } 4336 4337 /* 4338 * Flush any written data that is pending... 4339 */ 4340 4341 if (http->wused) 4342 { 4343 if (httpFlushWrite(http) < 0) 4344 if (httpReconnect2(http, 30000, NULL)) 4345 return (-1); 4346 } 4347 4348 /* 4349 * Send the request header... 4350 */ 4351 4352 http->state = request; 4353 http->data_encoding = HTTP_ENCODING_FIELDS; 4354 4355 if (request == HTTP_STATE_POST || request == HTTP_STATE_PUT) 4356 http->state ++; 4357 4358 http->status = HTTP_STATUS_CONTINUE; 4359 4360 #ifdef HAVE_SSL 4361 if (http->encryption == HTTP_ENCRYPTION_REQUIRED && !http->tls) 4362 { 4363 httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade"); 4364 httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.2,TLS/1.1,TLS/1.0"); 4365 } 4366 #endif /* HAVE_SSL */ 4367 4368 if (httpPrintf(http, "%s %s HTTP/1.1\r\n", codes[request], buf) < 1) 4369 { 4370 http->status = HTTP_STATUS_ERROR; 4371 return (-1); 4372 } 4373 4374 for (i = 0; i < HTTP_FIELD_MAX; i ++) 4375 if ((value = httpGetField(http, i)) != NULL && *value) 4376 { 4377 DEBUG_printf(("5http_send: %s: %s", http_fields[i], value)); 4378 4379 if (i == HTTP_FIELD_HOST) 4380 { 4381 if (httpPrintf(http, "Host: %s:%d\r\n", value, 4382 httpAddrPort(http->hostaddr)) < 1) 4383 { 4384 http->status = HTTP_STATUS_ERROR; 4385 return (-1); 4386 } 4387 } 4388 else if (httpPrintf(http, "%s: %s\r\n", http_fields[i], value) < 1) 4389 { 4390 http->status = HTTP_STATUS_ERROR; 4391 return (-1); 4392 } 4393 } 4394 4395 if (http->cookie) 4396 if (httpPrintf(http, "Cookie: $Version=0; %s\r\n", http->cookie) < 1) 4397 { 4398 http->status = HTTP_STATUS_ERROR; 4399 return (-1); 4400 } 4401 4402 DEBUG_printf(("5http_send: expect=%d, mode=%d, state=%d", http->expect, 4403 http->mode, http->state)); 4404 4405 if (http->expect == HTTP_STATUS_CONTINUE && http->mode == _HTTP_MODE_CLIENT && 4406 (http->state == HTTP_STATE_POST_RECV || 4407 http->state == HTTP_STATE_PUT_RECV)) 4408 if (httpPrintf(http, "Expect: 100-continue\r\n") < 1) 4409 { 4410 http->status = HTTP_STATUS_ERROR; 4411 return (-1); 4412 } 4413 4414 if (httpPrintf(http, "\r\n") < 1) 4415 { 4416 http->status = HTTP_STATUS_ERROR; 4417 return (-1); 4418 } 4419 4420 if (httpFlushWrite(http) < 0) 4421 return (-1); 4422 4423 http_set_length(http); 4424 httpClearFields(http); 4425 4426 /* 4427 * The Kerberos and AuthRef authentication strings can only be used once... 4428 */ 4429 4430 if (http->field_authorization && http->authstring && 4431 (!strncmp(http->authstring, "Negotiate", 9) || 4432 !strncmp(http->authstring, "AuthRef", 7))) 4433 { 4434 http->_authstring[0] = '\0'; 4435 4436 if (http->authstring != http->_authstring) 4437 free(http->authstring); 4438 4439 http->authstring = http->_authstring; 4440 } 4441 4442 return (0); 4443 } 4444 4445 4446 /* 4447 * 'http_set_length()' - Set the data_encoding and data_remaining values. 4448 */ 4449 4450 static off_t /* O - Remainder or -1 on error */ 4451 http_set_length(http_t *http) /* I - Connection */ 4452 { 4453 off_t remaining; /* Remainder */ 4454 4455 4456 DEBUG_printf(("http_set_length(http=%p) mode=%d state=%s", (void *)http, http->mode, httpStateString(http->state))); 4457 4458 if ((remaining = httpGetLength2(http)) >= 0) 4459 { 4460 if (http->mode == _HTTP_MODE_SERVER && 4461 http->state != HTTP_STATE_GET_SEND && 4462 http->state != HTTP_STATE_PUT && 4463 http->state != HTTP_STATE_POST && 4464 http->state != HTTP_STATE_POST_SEND) 4465 { 4466 DEBUG_puts("1http_set_length: Not setting data_encoding/remaining."); 4467 return (remaining); 4468 } 4469 4470 if (!_cups_strcasecmp(http->fields[HTTP_FIELD_TRANSFER_ENCODING], 4471 "chunked")) 4472 { 4473 DEBUG_puts("1http_set_length: Setting data_encoding to " 4474 "HTTP_ENCODING_CHUNKED."); 4475 http->data_encoding = HTTP_ENCODING_CHUNKED; 4476 } 4477 else 4478 { 4479 DEBUG_puts("1http_set_length: Setting data_encoding to " 4480 "HTTP_ENCODING_LENGTH."); 4481 http->data_encoding = HTTP_ENCODING_LENGTH; 4482 } 4483 4484 DEBUG_printf(("1http_set_length: Setting data_remaining to " CUPS_LLFMT ".", 4485 CUPS_LLCAST remaining)); 4486 http->data_remaining = remaining; 4487 4488 if (remaining <= INT_MAX) 4489 http->_data_remaining = (int)remaining; 4490 else 4491 http->_data_remaining = INT_MAX; 4492 } 4493 4494 return (remaining); 4495 } 4496 4497 /* 4498 * 'http_set_timeout()' - Set the socket timeout values. 4499 */ 4500 4501 static void 4502 http_set_timeout(int fd, /* I - File descriptor */ 4503 double timeout) /* I - Timeout in seconds */ 4504 { 4505 #ifdef WIN32 4506 DWORD tv = (DWORD)(timeout * 1000); 4507 /* Timeout in milliseconds */ 4508 4509 setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, CUPS_SOCAST &tv, sizeof(tv)); 4510 setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, CUPS_SOCAST &tv, sizeof(tv)); 4511 4512 #else 4513 struct timeval tv; /* Timeout in secs and usecs */ 4514 4515 tv.tv_sec = (int)timeout; 4516 tv.tv_usec = (int)(1000000 * fmod(timeout, 1.0)); 4517 4518 setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, CUPS_SOCAST &tv, sizeof(tv)); 4519 setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, CUPS_SOCAST &tv, sizeof(tv)); 4520 #endif /* WIN32 */ 4521 } 4522 4523 4524 /* 4525 * 'http_set_wait()' - Set the default wait value for reads. 4526 */ 4527 4528 static void 4529 http_set_wait(http_t *http) /* I - HTTP connection */ 4530 { 4531 if (http->blocking) 4532 { 4533 http->wait_value = (int)(http->timeout_value * 1000); 4534 4535 if (http->wait_value <= 0) 4536 http->wait_value = 60000; 4537 } 4538 else 4539 http->wait_value = 10000; 4540 } 4541 4542 4543 #ifdef HAVE_SSL 4544 /* 4545 * 'http_tls_upgrade()' - Force upgrade to TLS encryption. 4546 */ 4547 4548 static int /* O - Status of connection */ 4549 http_tls_upgrade(http_t *http) /* I - HTTP connection */ 4550 { 4551 int ret; /* Return value */ 4552 http_t myhttp; /* Local copy of HTTP data */ 4553 4554 4555 DEBUG_printf(("7http_tls_upgrade(%p)", (void *)http)); 4556 4557 /* 4558 * Flush the connection to make sure any previous "Upgrade" message 4559 * has been read. 4560 */ 4561 4562 httpFlush(http); 4563 4564 /* 4565 * Copy the HTTP data to a local variable so we can do the OPTIONS 4566 * request without interfering with the existing request data... 4567 */ 4568 4569 memcpy(&myhttp, http, sizeof(myhttp)); 4570 4571 /* 4572 * Send an OPTIONS request to the server, requiring SSL or TLS 4573 * encryption on the link... 4574 */ 4575 4576 http->tls_upgrade = 1; 4577 http->field_authorization = NULL; /* Don't free the auth string */ 4578 4579 httpClearFields(http); 4580 httpSetField(http, HTTP_FIELD_CONNECTION, "upgrade"); 4581 httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.2,TLS/1.1,TLS/1.0"); 4582 4583 if ((ret = httpOptions(http, "*")) == 0) 4584 { 4585 /* 4586 * Wait for the secure connection... 4587 */ 4588 4589 while (httpUpdate(http) == HTTP_STATUS_CONTINUE); 4590 } 4591 4592 /* 4593 * Restore the HTTP request data... 4594 */ 4595 4596 memcpy(http->fields, myhttp.fields, sizeof(http->fields)); 4597 http->data_encoding = myhttp.data_encoding; 4598 http->data_remaining = myhttp.data_remaining; 4599 http->_data_remaining = myhttp._data_remaining; 4600 http->expect = myhttp.expect; 4601 http->field_authorization = myhttp.field_authorization; 4602 http->digest_tries = myhttp.digest_tries; 4603 http->tls_upgrade = 0; 4604 4605 /* 4606 * See if we actually went secure... 4607 */ 4608 4609 if (!http->tls) 4610 { 4611 /* 4612 * Server does not support HTTP upgrade... 4613 */ 4614 4615 DEBUG_puts("8http_tls_upgrade: Server does not support HTTP upgrade!"); 4616 4617 _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, _("Encryption is not supported."), 1); 4618 httpAddrClose(NULL, http->fd); 4619 4620 http->fd = -1; 4621 4622 return (-1); 4623 } 4624 else 4625 return (ret); 4626 } 4627 #endif /* HAVE_SSL */ 4628 4629 4630 /* 4631 * 'http_write()' - Write a buffer to a HTTP connection. 4632 */ 4633 4634 static ssize_t /* O - Number of bytes written */ 4635 http_write(http_t *http, /* I - HTTP connection */ 4636 const char *buffer, /* I - Buffer for data */ 4637 size_t length) /* I - Number of bytes to write */ 4638 { 4639 ssize_t tbytes, /* Total bytes sent */ 4640 bytes; /* Bytes sent */ 4641 4642 4643 DEBUG_printf(("2http_write(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); 4644 http->error = 0; 4645 tbytes = 0; 4646 4647 while (length > 0) 4648 { 4649 DEBUG_printf(("3http_write: About to write %d bytes.", (int)length)); 4650 4651 if (http->timeout_cb) 4652 { 4653 #ifdef HAVE_POLL 4654 struct pollfd pfd; /* Polled file descriptor */ 4655 #else 4656 fd_set output_set; /* Output ready for write? */ 4657 struct timeval timeout; /* Timeout value */ 4658 #endif /* HAVE_POLL */ 4659 int nfds; /* Result from select()/poll() */ 4660 4661 do 4662 { 4663 #ifdef HAVE_POLL 4664 pfd.fd = http->fd; 4665 pfd.events = POLLOUT; 4666 4667 while ((nfds = poll(&pfd, 1, http->wait_value)) < 0 && 4668 (errno == EINTR || errno == EAGAIN)) 4669 /* do nothing */; 4670 4671 #else 4672 do 4673 { 4674 FD_ZERO(&output_set); 4675 FD_SET(http->fd, &output_set); 4676 4677 timeout.tv_sec = http->wait_value / 1000; 4678 timeout.tv_usec = 1000 * (http->wait_value % 1000); 4679 4680 nfds = select(http->fd + 1, NULL, &output_set, NULL, &timeout); 4681 } 4682 # ifdef WIN32 4683 while (nfds < 0 && (WSAGetLastError() == WSAEINTR || 4684 WSAGetLastError() == WSAEWOULDBLOCK)); 4685 # else 4686 while (nfds < 0 && (errno == EINTR || errno == EAGAIN)); 4687 # endif /* WIN32 */ 4688 #endif /* HAVE_POLL */ 4689 4690 if (nfds < 0) 4691 { 4692 http->error = errno; 4693 return (-1); 4694 } 4695 else if (nfds == 0 && !(*http->timeout_cb)(http, http->timeout_data)) 4696 { 4697 #ifdef WIN32 4698 http->error = WSAEWOULDBLOCK; 4699 #else 4700 http->error = EWOULDBLOCK; 4701 #endif /* WIN32 */ 4702 return (-1); 4703 } 4704 } 4705 while (nfds <= 0); 4706 } 4707 4708 #ifdef HAVE_SSL 4709 if (http->tls) 4710 bytes = _httpTLSWrite(http, buffer, (int)length); 4711 else 4712 #endif /* HAVE_SSL */ 4713 bytes = send(http->fd, buffer, length, 0); 4714 4715 DEBUG_printf(("3http_write: Write of " CUPS_LLFMT " bytes returned " 4716 CUPS_LLFMT ".", CUPS_LLCAST length, CUPS_LLCAST bytes)); 4717 4718 if (bytes < 0) 4719 { 4720 #ifdef WIN32 4721 if (WSAGetLastError() == WSAEINTR) 4722 continue; 4723 else if (WSAGetLastError() == WSAEWOULDBLOCK) 4724 { 4725 if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) 4726 continue; 4727 4728 http->error = WSAGetLastError(); 4729 } 4730 else if (WSAGetLastError() != http->error && 4731 WSAGetLastError() != WSAECONNRESET) 4732 { 4733 http->error = WSAGetLastError(); 4734 continue; 4735 } 4736 4737 #else 4738 if (errno == EINTR) 4739 continue; 4740 else if (errno == EWOULDBLOCK || errno == EAGAIN) 4741 { 4742 if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) 4743 continue; 4744 else if (!http->timeout_cb && errno == EAGAIN) 4745 continue; 4746 4747 http->error = errno; 4748 } 4749 else if (errno != http->error && errno != ECONNRESET) 4750 { 4751 http->error = errno; 4752 continue; 4753 } 4754 #endif /* WIN32 */ 4755 4756 DEBUG_printf(("3http_write: error writing data (%s).", 4757 strerror(http->error))); 4758 4759 return (-1); 4760 } 4761 4762 buffer += bytes; 4763 tbytes += bytes; 4764 length -= (size_t)bytes; 4765 } 4766 4767 #ifdef DEBUG 4768 http_debug_hex("http_write", buffer - tbytes, (int)tbytes); 4769 #endif /* DEBUG */ 4770 4771 DEBUG_printf(("3http_write: Returning " CUPS_LLFMT ".", CUPS_LLCAST tbytes)); 4772 4773 return (tbytes); 4774 } 4775 4776 4777 /* 4778 * 'http_write_chunk()' - Write a chunked buffer. 4779 */ 4780 4781 static ssize_t /* O - Number bytes written */ 4782 http_write_chunk(http_t *http, /* I - HTTP connection */ 4783 const char *buffer, /* I - Buffer to write */ 4784 size_t length) /* I - Length of buffer */ 4785 { 4786 char header[16]; /* Chunk header */ 4787 ssize_t bytes; /* Bytes written */ 4788 4789 4790 DEBUG_printf(("7http_write_chunk(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); 4791 4792 /* 4793 * Write the chunk header, data, and trailer. 4794 */ 4795 4796 snprintf(header, sizeof(header), "%x\r\n", (unsigned)length); 4797 if (http_write(http, header, strlen(header)) < 0) 4798 { 4799 DEBUG_puts("8http_write_chunk: http_write of length failed."); 4800 return (-1); 4801 } 4802 4803 if ((bytes = http_write(http, buffer, length)) < 0) 4804 { 4805 DEBUG_puts("8http_write_chunk: http_write of buffer failed."); 4806 return (-1); 4807 } 4808 4809 if (http_write(http, "\r\n", 2) < 0) 4810 { 4811 DEBUG_puts("8http_write_chunk: http_write of CR LF failed."); 4812 return (-1); 4813 } 4814 4815 return (bytes); 4816 } 4817
