1 /* 2 * QEMU I/O channels driver websockets 3 * 4 * Copyright (c) 2015 Red Hat, Inc. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 * 19 */ 20 21 #include "qemu/osdep.h" 22 #include "qapi/error.h" 23 #include "qemu/bswap.h" 24 #include "io/channel-websock.h" 25 #include "crypto/hash.h" 26 #include "trace.h" 27 #include "qemu/iov.h" 28 29 /* Max amount to allow in rawinput/encoutput buffers */ 30 #define QIO_CHANNEL_WEBSOCK_MAX_BUFFER 8192 31 32 #define QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN 24 33 #define QIO_CHANNEL_WEBSOCK_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11" 34 #define QIO_CHANNEL_WEBSOCK_GUID_LEN strlen(QIO_CHANNEL_WEBSOCK_GUID) 35 36 #define QIO_CHANNEL_WEBSOCK_HEADER_PROTOCOL "sec-websocket-protocol" 37 #define QIO_CHANNEL_WEBSOCK_HEADER_VERSION "sec-websocket-version" 38 #define QIO_CHANNEL_WEBSOCK_HEADER_KEY "sec-websocket-key" 39 #define QIO_CHANNEL_WEBSOCK_HEADER_UPGRADE "upgrade" 40 #define QIO_CHANNEL_WEBSOCK_HEADER_HOST "host" 41 #define QIO_CHANNEL_WEBSOCK_HEADER_CONNECTION "connection" 42 43 #define QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY "binary" 44 #define QIO_CHANNEL_WEBSOCK_CONNECTION_UPGRADE "Upgrade" 45 #define QIO_CHANNEL_WEBSOCK_UPGRADE_WEBSOCKET "websocket" 46 47 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ 48 "Server: QEMU VNC\r\n" \ 49 "Date: %s\r\n" 50 51 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_OK \ 52 "HTTP/1.1 101 Switching Protocols\r\n" \ 53 QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ 54 "Upgrade: websocket\r\n" \ 55 "Connection: Upgrade\r\n" \ 56 "Sec-WebSocket-Accept: %s\r\n" \ 57 "Sec-WebSocket-Protocol: binary\r\n" \ 58 "\r\n" 59 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_NOT_FOUND \ 60 "HTTP/1.1 404 Not Found\r\n" \ 61 QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ 62 "Connection: close\r\n" \ 63 "\r\n" 64 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_BAD_REQUEST \ 65 "HTTP/1.1 400 Bad Request\r\n" \ 66 QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ 67 "Connection: close\r\n" \ 68 "Sec-WebSocket-Version: " \ 69 QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION \ 70 "\r\n" 71 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_SERVER_ERR \ 72 "HTTP/1.1 500 Internal Server Error\r\n" \ 73 QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ 74 "Connection: close\r\n" \ 75 "\r\n" 76 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_TOO_LARGE \ 77 "HTTP/1.1 403 Request Entity Too Large\r\n" \ 78 QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ 79 "Connection: close\r\n" \ 80 "\r\n" 81 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM "\r\n" 82 #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_END "\r\n\r\n" 83 #define QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION "13" 84 #define QIO_CHANNEL_WEBSOCK_HTTP_METHOD "GET" 85 #define QIO_CHANNEL_WEBSOCK_HTTP_PATH "/" 86 #define QIO_CHANNEL_WEBSOCK_HTTP_VERSION "HTTP/1.1" 87 88 /* The websockets packet header is variable length 89 * depending on the size of the payload... */ 90 91 /* ...length when using 7-bit payload length */ 92 #define QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT 6 93 /* ...length when using 16-bit payload length */ 94 #define QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT 8 95 /* ...length when using 64-bit payload length */ 96 #define QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT 14 97 98 /* Length of the optional data mask field in header */ 99 #define QIO_CHANNEL_WEBSOCK_HEADER_LEN_MASK 4 100 101 /* Maximum length that can fit in 7-bit payload size */ 102 #define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_7_BIT 126 103 /* Maximum length that can fit in 16-bit payload size */ 104 #define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_16_BIT 65536 105 106 /* Magic 7-bit length to indicate use of 16-bit payload length */ 107 #define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT 126 108 /* Magic 7-bit length to indicate use of 64-bit payload length */ 109 #define QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_64_BIT 127 110 111 /* Bitmasks for accessing header fields */ 112 #define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_FIN 0x80 113 #define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_OPCODE 0x0f 114 #define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_HAS_MASK 0x80 115 #define QIO_CHANNEL_WEBSOCK_HEADER_FIELD_PAYLOAD_LEN 0x7f 116 #define QIO_CHANNEL_WEBSOCK_CONTROL_OPCODE_MASK 0x8 117 118 typedef struct QIOChannelWebsockHeader QIOChannelWebsockHeader; 119 120 struct QEMU_PACKED QIOChannelWebsockHeader { 121 unsigned char b0; 122 unsigned char b1; 123 union { 124 struct QEMU_PACKED { 125 uint16_t l16; 126 QIOChannelWebsockMask m16; 127 } s16; 128 struct QEMU_PACKED { 129 uint64_t l64; 130 QIOChannelWebsockMask m64; 131 } s64; 132 QIOChannelWebsockMask m; 133 } u; 134 }; 135 136 typedef struct QIOChannelWebsockHTTPHeader QIOChannelWebsockHTTPHeader; 137 138 struct QIOChannelWebsockHTTPHeader { 139 char *name; 140 char *value; 141 }; 142 143 enum { 144 QIO_CHANNEL_WEBSOCK_OPCODE_CONTINUATION = 0x0, 145 QIO_CHANNEL_WEBSOCK_OPCODE_TEXT_FRAME = 0x1, 146 QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME = 0x2, 147 QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE = 0x8, 148 QIO_CHANNEL_WEBSOCK_OPCODE_PING = 0x9, 149 QIO_CHANNEL_WEBSOCK_OPCODE_PONG = 0xA 150 }; 151 152 static void GCC_FMT_ATTR(2, 3) 153 qio_channel_websock_handshake_send_res(QIOChannelWebsock *ioc, 154 const char *resmsg, 155 ...) 156 { 157 va_list vargs; 158 char *response; 159 size_t responselen; 160 161 va_start(vargs, resmsg); 162 response = g_strdup_vprintf(resmsg, vargs); 163 responselen = strlen(response); 164 buffer_reserve(&ioc->encoutput, responselen); 165 buffer_append(&ioc->encoutput, response, responselen); 166 va_end(vargs); 167 } 168 169 static gchar *qio_channel_websock_date_str(void) 170 { 171 struct tm tm; 172 time_t now = time(NULL); 173 char datebuf[128]; 174 175 gmtime_r(&now, &tm); 176 177 strftime(datebuf, sizeof(datebuf), "%a, %d %b %Y %H:%M:%S GMT", &tm); 178 179 return g_strdup(datebuf); 180 } 181 182 static void qio_channel_websock_handshake_send_res_err(QIOChannelWebsock *ioc, 183 const char *resdata) 184 { 185 char *date = qio_channel_websock_date_str(); 186 qio_channel_websock_handshake_send_res(ioc, resdata, date); 187 g_free(date); 188 } 189 190 enum { 191 QIO_CHANNEL_WEBSOCK_STATUS_NORMAL = 1000, 192 QIO_CHANNEL_WEBSOCK_STATUS_PROTOCOL_ERR = 1002, 193 QIO_CHANNEL_WEBSOCK_STATUS_INVALID_DATA = 1003, 194 QIO_CHANNEL_WEBSOCK_STATUS_POLICY = 1008, 195 QIO_CHANNEL_WEBSOCK_STATUS_TOO_LARGE = 1009, 196 QIO_CHANNEL_WEBSOCK_STATUS_SERVER_ERR = 1011, 197 }; 198 199 static size_t 200 qio_channel_websock_extract_headers(QIOChannelWebsock *ioc, 201 char *buffer, 202 QIOChannelWebsockHTTPHeader *hdrs, 203 size_t nhdrsalloc, 204 Error **errp) 205 { 206 char *nl, *sep, *tmp; 207 size_t nhdrs = 0; 208 209 /* 210 * First parse the HTTP protocol greeting of format: 211 * 212 * $METHOD $PATH $VERSION 213 * 214 * e.g. 215 * 216 * GET / HTTP/1.1 217 */ 218 219 nl = strstr(buffer, QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM); 220 if (!nl) { 221 error_setg(errp, "Missing HTTP header delimiter"); 222 goto bad_request; 223 } 224 *nl = '\0'; 225 trace_qio_channel_websock_http_greeting(ioc, buffer); 226 227 tmp = strchr(buffer, ' '); 228 if (!tmp) { 229 error_setg(errp, "Missing HTTP path delimiter"); 230 return 0; 231 } 232 *tmp = '\0'; 233 234 if (!g_str_equal(buffer, QIO_CHANNEL_WEBSOCK_HTTP_METHOD)) { 235 error_setg(errp, "Unsupported HTTP method %s", buffer); 236 goto bad_request; 237 } 238 239 buffer = tmp + 1; 240 tmp = strchr(buffer, ' '); 241 if (!tmp) { 242 error_setg(errp, "Missing HTTP version delimiter"); 243 goto bad_request; 244 } 245 *tmp = '\0'; 246 247 if (!g_str_equal(buffer, QIO_CHANNEL_WEBSOCK_HTTP_PATH)) { 248 qio_channel_websock_handshake_send_res_err( 249 ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_NOT_FOUND); 250 error_setg(errp, "Unexpected HTTP path %s", buffer); 251 return 0; 252 } 253 254 buffer = tmp + 1; 255 256 if (!g_str_equal(buffer, QIO_CHANNEL_WEBSOCK_HTTP_VERSION)) { 257 error_setg(errp, "Unsupported HTTP version %s", buffer); 258 goto bad_request; 259 } 260 261 buffer = nl + strlen(QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM); 262 263 /* 264 * Now parse all the header fields of format 265 * 266 * $NAME: $VALUE 267 * 268 * e.g. 269 * 270 * Cache-control: no-cache 271 */ 272 do { 273 QIOChannelWebsockHTTPHeader *hdr; 274 275 nl = strstr(buffer, QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM); 276 if (nl) { 277 *nl = '\0'; 278 } 279 280 sep = strchr(buffer, ':'); 281 if (!sep) { 282 error_setg(errp, "Malformed HTTP header"); 283 goto bad_request; 284 } 285 *sep = '\0'; 286 sep++; 287 while (*sep == ' ') { 288 sep++; 289 } 290 291 if (nhdrs >= nhdrsalloc) { 292 error_setg(errp, "Too many HTTP headers"); 293 goto bad_request; 294 } 295 296 hdr = &hdrs[nhdrs++]; 297 hdr->name = buffer; 298 hdr->value = sep; 299 300 /* Canonicalize header name for easier identification later */ 301 for (tmp = hdr->name; *tmp; tmp++) { 302 *tmp = g_ascii_tolower(*tmp); 303 } 304 305 if (nl) { 306 buffer = nl + strlen(QIO_CHANNEL_WEBSOCK_HANDSHAKE_DELIM); 307 } 308 } while (nl != NULL); 309 310 return nhdrs; 311 312 bad_request: 313 qio_channel_websock_handshake_send_res_err( 314 ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_BAD_REQUEST); 315 return 0; 316 } 317 318 static const char * 319 qio_channel_websock_find_header(QIOChannelWebsockHTTPHeader *hdrs, 320 size_t nhdrs, 321 const char *name) 322 { 323 size_t i; 324 325 for (i = 0; i < nhdrs; i++) { 326 if (g_str_equal(hdrs[i].name, name)) { 327 return hdrs[i].value; 328 } 329 } 330 331 return NULL; 332 } 333 334 335 static void qio_channel_websock_handshake_send_res_ok(QIOChannelWebsock *ioc, 336 const char *key, 337 Error **errp) 338 { 339 char combined_key[QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN + 340 QIO_CHANNEL_WEBSOCK_GUID_LEN + 1]; 341 char *accept = NULL; 342 char *date = NULL; 343 344 g_strlcpy(combined_key, key, QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN + 1); 345 g_strlcat(combined_key, QIO_CHANNEL_WEBSOCK_GUID, 346 QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN + 347 QIO_CHANNEL_WEBSOCK_GUID_LEN + 1); 348 349 /* hash and encode it */ 350 if (qcrypto_hash_base64(QCRYPTO_HASH_ALG_SHA1, 351 combined_key, 352 QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN + 353 QIO_CHANNEL_WEBSOCK_GUID_LEN, 354 &accept, 355 errp) < 0) { 356 qio_channel_websock_handshake_send_res_err( 357 ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_SERVER_ERR); 358 return; 359 } 360 361 date = qio_channel_websock_date_str(); 362 qio_channel_websock_handshake_send_res( 363 ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_OK, date, accept); 364 365 g_free(date); 366 g_free(accept); 367 } 368 369 static void qio_channel_websock_handshake_process(QIOChannelWebsock *ioc, 370 char *buffer, 371 Error **errp) 372 { 373 QIOChannelWebsockHTTPHeader hdrs[32]; 374 size_t nhdrs = G_N_ELEMENTS(hdrs); 375 const char *protocols = NULL, *version = NULL, *key = NULL, 376 *host = NULL, *connection = NULL, *upgrade = NULL; 377 char **connectionv; 378 bool upgraded = false; 379 size_t i; 380 381 nhdrs = qio_channel_websock_extract_headers(ioc, buffer, hdrs, nhdrs, errp); 382 if (!nhdrs) { 383 return; 384 } 385 386 protocols = qio_channel_websock_find_header( 387 hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_PROTOCOL); 388 if (!protocols) { 389 error_setg(errp, "Missing websocket protocol header data"); 390 goto bad_request; 391 } 392 393 version = qio_channel_websock_find_header( 394 hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_VERSION); 395 if (!version) { 396 error_setg(errp, "Missing websocket version header data"); 397 goto bad_request; 398 } 399 400 key = qio_channel_websock_find_header( 401 hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_KEY); 402 if (!key) { 403 error_setg(errp, "Missing websocket key header data"); 404 goto bad_request; 405 } 406 407 host = qio_channel_websock_find_header( 408 hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_HOST); 409 if (!host) { 410 error_setg(errp, "Missing websocket host header data"); 411 goto bad_request; 412 } 413 414 connection = qio_channel_websock_find_header( 415 hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_CONNECTION); 416 if (!connection) { 417 error_setg(errp, "Missing websocket connection header data"); 418 goto bad_request; 419 } 420 421 upgrade = qio_channel_websock_find_header( 422 hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_UPGRADE); 423 if (!upgrade) { 424 error_setg(errp, "Missing websocket upgrade header data"); 425 goto bad_request; 426 } 427 428 trace_qio_channel_websock_http_request(ioc, protocols, version, 429 host, connection, upgrade, key); 430 431 if (!g_strrstr(protocols, QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY)) { 432 error_setg(errp, "No '%s' protocol is supported by client '%s'", 433 QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY, protocols); 434 goto bad_request; 435 } 436 437 if (!g_str_equal(version, QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION)) { 438 error_setg(errp, "Version '%s' is not supported by client '%s'", 439 QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION, version); 440 goto bad_request; 441 } 442 443 if (strlen(key) != QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN) { 444 error_setg(errp, "Key length '%zu' was not as expected '%d'", 445 strlen(key), QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN); 446 goto bad_request; 447 } 448 449 connectionv = g_strsplit(connection, ",", 0); 450 for (i = 0; connectionv != NULL && connectionv[i] != NULL; i++) { 451 g_strstrip(connectionv[i]); 452 if (strcasecmp(connectionv[i], 453 QIO_CHANNEL_WEBSOCK_CONNECTION_UPGRADE) == 0) { 454 upgraded = true; 455 } 456 } 457 g_strfreev(connectionv); 458 if (!upgraded) { 459 error_setg(errp, "No connection upgrade requested '%s'", connection); 460 goto bad_request; 461 } 462 463 if (strcasecmp(upgrade, QIO_CHANNEL_WEBSOCK_UPGRADE_WEBSOCKET) != 0) { 464 error_setg(errp, "Incorrect upgrade method '%s'", upgrade); 465 goto bad_request; 466 } 467 468 qio_channel_websock_handshake_send_res_ok(ioc, key, errp); 469 return; 470 471 bad_request: 472 qio_channel_websock_handshake_send_res_err( 473 ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_BAD_REQUEST); 474 } 475 476 static int qio_channel_websock_handshake_read(QIOChannelWebsock *ioc, 477 Error **errp) 478 { 479 char *handshake_end; 480 ssize_t ret; 481 /* Typical HTTP headers from novnc are 512 bytes, so limiting 482 * total header size to 4096 is easily enough. */ 483 size_t want = 4096 - ioc->encinput.offset; 484 buffer_reserve(&ioc->encinput, want); 485 ret = qio_channel_read(ioc->master, 486 (char *)buffer_end(&ioc->encinput), want, errp); 487 if (ret < 0) { 488 return -1; 489 } 490 ioc->encinput.offset += ret; 491 492 handshake_end = g_strstr_len((char *)ioc->encinput.buffer, 493 ioc->encinput.offset, 494 QIO_CHANNEL_WEBSOCK_HANDSHAKE_END); 495 if (!handshake_end) { 496 if (ioc->encinput.offset >= 4096) { 497 qio_channel_websock_handshake_send_res_err( 498 ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_TOO_LARGE); 499 error_setg(errp, 500 "End of headers not found in first 4096 bytes"); 501 return 1; 502 } else { 503 return 0; 504 } 505 } 506 *handshake_end = '\0'; 507 508 qio_channel_websock_handshake_process(ioc, 509 (char *)ioc->encinput.buffer, 510 errp); 511 512 buffer_advance(&ioc->encinput, 513 handshake_end - (char *)ioc->encinput.buffer + 514 strlen(QIO_CHANNEL_WEBSOCK_HANDSHAKE_END)); 515 return 1; 516 } 517 518 static gboolean qio_channel_websock_handshake_send(QIOChannel *ioc, 519 GIOCondition condition, 520 gpointer user_data) 521 { 522 QIOTask *task = user_data; 523 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK( 524 qio_task_get_source(task)); 525 Error *err = NULL; 526 ssize_t ret; 527 528 ret = qio_channel_write(wioc->master, 529 (char *)wioc->encoutput.buffer, 530 wioc->encoutput.offset, 531 &err); 532 533 if (ret < 0) { 534 trace_qio_channel_websock_handshake_fail(ioc, error_get_pretty(err)); 535 qio_task_set_error(task, err); 536 qio_task_complete(task); 537 return FALSE; 538 } 539 540 buffer_advance(&wioc->encoutput, ret); 541 if (wioc->encoutput.offset == 0) { 542 if (wioc->io_err) { 543 trace_qio_channel_websock_handshake_fail( 544 ioc, error_get_pretty(wioc->io_err)); 545 qio_task_set_error(task, wioc->io_err); 546 wioc->io_err = NULL; 547 qio_task_complete(task); 548 } else { 549 trace_qio_channel_websock_handshake_complete(ioc); 550 qio_task_complete(task); 551 } 552 return FALSE; 553 } 554 trace_qio_channel_websock_handshake_pending(ioc, G_IO_OUT); 555 return TRUE; 556 } 557 558 static gboolean qio_channel_websock_handshake_io(QIOChannel *ioc, 559 GIOCondition condition, 560 gpointer user_data) 561 { 562 QIOTask *task = user_data; 563 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK( 564 qio_task_get_source(task)); 565 Error *err = NULL; 566 int ret; 567 568 ret = qio_channel_websock_handshake_read(wioc, &err); 569 if (ret < 0) { 570 /* 571 * We only take this path on a fatal I/O error reading from 572 * client connection, as most of the time we have an 573 * HTTP 4xx err response to send instead 574 */ 575 trace_qio_channel_websock_handshake_fail(ioc, error_get_pretty(err)); 576 qio_task_set_error(task, err); 577 qio_task_complete(task); 578 return FALSE; 579 } 580 if (ret == 0) { 581 trace_qio_channel_websock_handshake_pending(ioc, G_IO_IN); 582 /* need more data still */ 583 return TRUE; 584 } 585 586 if (err) { 587 error_propagate(&wioc->io_err, err); 588 } 589 590 trace_qio_channel_websock_handshake_reply(ioc); 591 qio_channel_add_watch( 592 wioc->master, 593 G_IO_OUT, 594 qio_channel_websock_handshake_send, 595 task, 596 NULL); 597 return FALSE; 598 } 599 600 601 static void qio_channel_websock_encode(QIOChannelWebsock *ioc, 602 uint8_t opcode, 603 const struct iovec *iov, 604 size_t niov, 605 size_t size) 606 { 607 size_t header_size; 608 size_t i; 609 union { 610 char buf[QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT]; 611 QIOChannelWebsockHeader ws; 612 } header; 613 614 assert(size <= iov_size(iov, niov)); 615 616 header.ws.b0 = QIO_CHANNEL_WEBSOCK_HEADER_FIELD_FIN | 617 (opcode & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_OPCODE); 618 if (size < QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_7_BIT) { 619 header.ws.b1 = (uint8_t)size; 620 header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT; 621 } else if (size < QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_16_BIT) { 622 header.ws.b1 = QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT; 623 header.ws.u.s16.l16 = cpu_to_be16((uint16_t)size); 624 header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT; 625 } else { 626 header.ws.b1 = QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_64_BIT; 627 header.ws.u.s64.l64 = cpu_to_be64(size); 628 header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT; 629 } 630 header_size -= QIO_CHANNEL_WEBSOCK_HEADER_LEN_MASK; 631 632 trace_qio_channel_websock_encode(ioc, opcode, header_size, size); 633 buffer_reserve(&ioc->encoutput, header_size + size); 634 buffer_append(&ioc->encoutput, header.buf, header_size); 635 for (i = 0; i < niov && size != 0; i++) { 636 size_t want = iov[i].iov_len; 637 if (want > size) { 638 want = size; 639 } 640 buffer_append(&ioc->encoutput, iov[i].iov_base, want); 641 size -= want; 642 } 643 } 644 645 646 static ssize_t qio_channel_websock_write_wire(QIOChannelWebsock *, Error **); 647 648 649 static void qio_channel_websock_write_close(QIOChannelWebsock *ioc, 650 uint16_t code, const char *reason) 651 { 652 struct iovec iov[2] = { 653 { .iov_base = &code, .iov_len = sizeof(code) }, 654 }; 655 size_t niov = 1; 656 size_t size = iov[0].iov_len; 657 658 cpu_to_be16s(&code); 659 660 if (reason) { 661 iov[1].iov_base = (void *)reason; 662 iov[1].iov_len = strlen(reason); 663 size += iov[1].iov_len; 664 niov++; 665 } 666 qio_channel_websock_encode(ioc, QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE, 667 iov, niov, size); 668 qio_channel_websock_write_wire(ioc, NULL); 669 qio_channel_shutdown(ioc->master, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); 670 } 671 672 673 static int qio_channel_websock_decode_header(QIOChannelWebsock *ioc, 674 Error **errp) 675 { 676 unsigned char opcode, fin, has_mask; 677 size_t header_size; 678 size_t payload_len; 679 QIOChannelWebsockHeader *header = 680 (QIOChannelWebsockHeader *)ioc->encinput.buffer; 681 682 if (ioc->payload_remain) { 683 error_setg(errp, 684 "Decoding header but %zu bytes of payload remain", 685 ioc->payload_remain); 686 qio_channel_websock_write_close( 687 ioc, QIO_CHANNEL_WEBSOCK_STATUS_SERVER_ERR, 688 "internal server error"); 689 return -1; 690 } 691 if (ioc->encinput.offset < QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT) { 692 /* header not complete */ 693 return QIO_CHANNEL_ERR_BLOCK; 694 } 695 696 fin = header->b0 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_FIN; 697 opcode = header->b0 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_OPCODE; 698 has_mask = header->b1 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_HAS_MASK; 699 payload_len = header->b1 & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_PAYLOAD_LEN; 700 701 /* Save or restore opcode. */ 702 if (opcode) { 703 ioc->opcode = opcode; 704 } else { 705 opcode = ioc->opcode; 706 } 707 708 trace_qio_channel_websock_header_partial_decode(ioc, payload_len, 709 fin, opcode, (int)has_mask); 710 711 if (opcode == QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE) { 712 /* disconnect */ 713 return 0; 714 } 715 716 /* Websocket frame sanity check: 717 * * Fragmentation is only supported for binary frames. 718 * * All frames sent by a client MUST be masked. 719 * * Only binary and ping/pong encoding is supported. 720 */ 721 if (!fin) { 722 if (opcode != QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME) { 723 error_setg(errp, "only binary websocket frames may be fragmented"); 724 qio_channel_websock_write_close( 725 ioc, QIO_CHANNEL_WEBSOCK_STATUS_POLICY , 726 "only binary frames may be fragmented"); 727 return -1; 728 } 729 } else { 730 if (opcode != QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME && 731 opcode != QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE && 732 opcode != QIO_CHANNEL_WEBSOCK_OPCODE_PING && 733 opcode != QIO_CHANNEL_WEBSOCK_OPCODE_PONG) { 734 error_setg(errp, "unsupported opcode: %#04x; only binary, close, " 735 "ping, and pong websocket frames are supported", opcode); 736 qio_channel_websock_write_close( 737 ioc, QIO_CHANNEL_WEBSOCK_STATUS_INVALID_DATA , 738 "only binary, close, ping, and pong frames are supported"); 739 return -1; 740 } 741 } 742 if (!has_mask) { 743 error_setg(errp, "client websocket frames must be masked"); 744 qio_channel_websock_write_close( 745 ioc, QIO_CHANNEL_WEBSOCK_STATUS_PROTOCOL_ERR, 746 "client frames must be masked"); 747 return -1; 748 } 749 750 if (payload_len < QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT) { 751 ioc->payload_remain = payload_len; 752 header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT; 753 ioc->mask = header->u.m; 754 } else if (opcode & QIO_CHANNEL_WEBSOCK_CONTROL_OPCODE_MASK) { 755 error_setg(errp, "websocket control frame is too large"); 756 qio_channel_websock_write_close( 757 ioc, QIO_CHANNEL_WEBSOCK_STATUS_PROTOCOL_ERR, 758 "control frame is too large"); 759 return -1; 760 } else if (payload_len == QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT && 761 ioc->encinput.offset >= QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT) { 762 ioc->payload_remain = be16_to_cpu(header->u.s16.l16); 763 header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT; 764 ioc->mask = header->u.s16.m16; 765 } else if (payload_len == QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_64_BIT && 766 ioc->encinput.offset >= QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT) { 767 ioc->payload_remain = be64_to_cpu(header->u.s64.l64); 768 header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT; 769 ioc->mask = header->u.s64.m64; 770 } else { 771 /* header not complete */ 772 return QIO_CHANNEL_ERR_BLOCK; 773 } 774 775 trace_qio_channel_websock_header_full_decode( 776 ioc, header_size, ioc->payload_remain, ioc->mask.u); 777 buffer_advance(&ioc->encinput, header_size); 778 return 0; 779 } 780 781 782 static int qio_channel_websock_decode_payload(QIOChannelWebsock *ioc, 783 Error **errp) 784 { 785 size_t i; 786 size_t payload_len = 0; 787 uint32_t *payload32; 788 789 if (ioc->payload_remain) { 790 /* If we aren't at the end of the payload, then drop 791 * off the last bytes, so we're always multiple of 4 792 * for purpose of unmasking, except at end of payload 793 */ 794 if (ioc->encinput.offset < ioc->payload_remain) { 795 /* Wait for the entire payload before processing control frames 796 * because the payload will most likely be echoed back. */ 797 if (ioc->opcode & QIO_CHANNEL_WEBSOCK_CONTROL_OPCODE_MASK) { 798 return QIO_CHANNEL_ERR_BLOCK; 799 } 800 payload_len = ioc->encinput.offset - (ioc->encinput.offset % 4); 801 } else { 802 payload_len = ioc->payload_remain; 803 } 804 if (payload_len == 0) { 805 return QIO_CHANNEL_ERR_BLOCK; 806 } 807 808 ioc->payload_remain -= payload_len; 809 810 /* unmask frame */ 811 /* process 1 frame (32 bit op) */ 812 payload32 = (uint32_t *)ioc->encinput.buffer; 813 for (i = 0; i < payload_len / 4; i++) { 814 payload32[i] ^= ioc->mask.u; 815 } 816 /* process the remaining bytes (if any) */ 817 for (i *= 4; i < payload_len; i++) { 818 ioc->encinput.buffer[i] ^= ioc->mask.c[i % 4]; 819 } 820 } 821 822 trace_qio_channel_websock_payload_decode( 823 ioc, ioc->opcode, ioc->payload_remain); 824 825 if (ioc->opcode == QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME) { 826 if (payload_len) { 827 /* binary frames are passed on */ 828 buffer_reserve(&ioc->rawinput, payload_len); 829 buffer_append(&ioc->rawinput, ioc->encinput.buffer, payload_len); 830 } 831 } else if (ioc->opcode == QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE) { 832 /* close frames are echoed back */ 833 error_setg(errp, "websocket closed by peer"); 834 if (payload_len) { 835 /* echo client status */ 836 struct iovec iov = { .iov_base = ioc->encinput.buffer, 837 .iov_len = ioc->encinput.offset }; 838 qio_channel_websock_encode(ioc, QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE, 839 &iov, 1, iov.iov_len); 840 qio_channel_websock_write_wire(ioc, NULL); 841 qio_channel_shutdown(ioc->master, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); 842 } else { 843 /* send our own status */ 844 qio_channel_websock_write_close( 845 ioc, QIO_CHANNEL_WEBSOCK_STATUS_NORMAL, "peer requested close"); 846 } 847 return -1; 848 } else if (ioc->opcode == QIO_CHANNEL_WEBSOCK_OPCODE_PING) { 849 /* ping frames produce an immediate reply, as long as we've not still 850 * got a previous pong queued, in which case we drop the new pong */ 851 if (ioc->pong_remain == 0) { 852 struct iovec iov = { .iov_base = ioc->encinput.buffer, 853 .iov_len = ioc->encinput.offset }; 854 qio_channel_websock_encode(ioc, QIO_CHANNEL_WEBSOCK_OPCODE_PONG, 855 &iov, 1, iov.iov_len); 856 ioc->pong_remain = ioc->encoutput.offset; 857 } 858 } /* pong frames are ignored */ 859 860 if (payload_len) { 861 buffer_advance(&ioc->encinput, payload_len); 862 } 863 return 0; 864 } 865 866 867 QIOChannelWebsock * 868 qio_channel_websock_new_server(QIOChannel *master) 869 { 870 QIOChannelWebsock *wioc; 871 QIOChannel *ioc; 872 873 wioc = QIO_CHANNEL_WEBSOCK(object_new(TYPE_QIO_CHANNEL_WEBSOCK)); 874 ioc = QIO_CHANNEL(wioc); 875 876 wioc->master = master; 877 if (qio_channel_has_feature(master, QIO_CHANNEL_FEATURE_SHUTDOWN)) { 878 qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_SHUTDOWN); 879 } 880 object_ref(OBJECT(master)); 881 882 trace_qio_channel_websock_new_server(wioc, master); 883 return wioc; 884 } 885 886 void qio_channel_websock_handshake(QIOChannelWebsock *ioc, 887 QIOTaskFunc func, 888 gpointer opaque, 889 GDestroyNotify destroy) 890 { 891 QIOTask *task; 892 893 task = qio_task_new(OBJECT(ioc), 894 func, 895 opaque, 896 destroy); 897 898 trace_qio_channel_websock_handshake_start(ioc); 899 trace_qio_channel_websock_handshake_pending(ioc, G_IO_IN); 900 qio_channel_add_watch(ioc->master, 901 G_IO_IN, 902 qio_channel_websock_handshake_io, 903 task, 904 NULL); 905 } 906 907 908 static void qio_channel_websock_finalize(Object *obj) 909 { 910 QIOChannelWebsock *ioc = QIO_CHANNEL_WEBSOCK(obj); 911 912 buffer_free(&ioc->encinput); 913 buffer_free(&ioc->encoutput); 914 buffer_free(&ioc->rawinput); 915 object_unref(OBJECT(ioc->master)); 916 if (ioc->io_tag) { 917 g_source_remove(ioc->io_tag); 918 } 919 if (ioc->io_err) { 920 error_free(ioc->io_err); 921 } 922 } 923 924 925 static ssize_t qio_channel_websock_read_wire(QIOChannelWebsock *ioc, 926 Error **errp) 927 { 928 ssize_t ret; 929 930 if (ioc->encinput.offset < 4096) { 931 size_t want = 4096 - ioc->encinput.offset; 932 933 buffer_reserve(&ioc->encinput, want); 934 ret = qio_channel_read(ioc->master, 935 (char *)ioc->encinput.buffer + 936 ioc->encinput.offset, 937 want, 938 errp); 939 if (ret < 0) { 940 return ret; 941 } 942 if (ret == 0 && ioc->encinput.offset == 0) { 943 ioc->io_eof = TRUE; 944 return 0; 945 } 946 ioc->encinput.offset += ret; 947 } 948 949 while (ioc->encinput.offset != 0) { 950 if (ioc->payload_remain == 0) { 951 ret = qio_channel_websock_decode_header(ioc, errp); 952 if (ret < 0) { 953 return ret; 954 } 955 } 956 957 ret = qio_channel_websock_decode_payload(ioc, errp); 958 if (ret < 0) { 959 return ret; 960 } 961 } 962 return 1; 963 } 964 965 966 static ssize_t qio_channel_websock_write_wire(QIOChannelWebsock *ioc, 967 Error **errp) 968 { 969 ssize_t ret; 970 ssize_t done = 0; 971 972 while (ioc->encoutput.offset > 0) { 973 ret = qio_channel_write(ioc->master, 974 (char *)ioc->encoutput.buffer, 975 ioc->encoutput.offset, 976 errp); 977 if (ret < 0) { 978 if (ret == QIO_CHANNEL_ERR_BLOCK && 979 done > 0) { 980 return done; 981 } else { 982 return ret; 983 } 984 } 985 buffer_advance(&ioc->encoutput, ret); 986 done += ret; 987 if (ioc->pong_remain < ret) { 988 ioc->pong_remain = 0; 989 } else { 990 ioc->pong_remain -= ret; 991 } 992 } 993 return done; 994 } 995 996 997 static void qio_channel_websock_flush_free(gpointer user_data) 998 { 999 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(user_data); 1000 object_unref(OBJECT(wioc)); 1001 } 1002 1003 static void qio_channel_websock_set_watch(QIOChannelWebsock *ioc); 1004 1005 static gboolean qio_channel_websock_flush(QIOChannel *ioc, 1006 GIOCondition condition, 1007 gpointer user_data) 1008 { 1009 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(user_data); 1010 ssize_t ret; 1011 1012 if (condition & G_IO_OUT) { 1013 ret = qio_channel_websock_write_wire(wioc, &wioc->io_err); 1014 if (ret < 0) { 1015 goto cleanup; 1016 } 1017 } 1018 1019 if (condition & G_IO_IN) { 1020 ret = qio_channel_websock_read_wire(wioc, &wioc->io_err); 1021 if (ret < 0) { 1022 goto cleanup; 1023 } 1024 } 1025 1026 cleanup: 1027 qio_channel_websock_set_watch(wioc); 1028 return FALSE; 1029 } 1030 1031 1032 static void qio_channel_websock_unset_watch(QIOChannelWebsock *ioc) 1033 { 1034 if (ioc->io_tag) { 1035 g_source_remove(ioc->io_tag); 1036 ioc->io_tag = 0; 1037 } 1038 } 1039 1040 static void qio_channel_websock_set_watch(QIOChannelWebsock *ioc) 1041 { 1042 GIOCondition cond = 0; 1043 1044 qio_channel_websock_unset_watch(ioc); 1045 1046 if (ioc->io_err) { 1047 return; 1048 } 1049 1050 if (ioc->encoutput.offset) { 1051 cond |= G_IO_OUT; 1052 } 1053 if (ioc->encinput.offset < QIO_CHANNEL_WEBSOCK_MAX_BUFFER && 1054 !ioc->io_eof) { 1055 cond |= G_IO_IN; 1056 } 1057 1058 if (cond) { 1059 object_ref(OBJECT(ioc)); 1060 ioc->io_tag = 1061 qio_channel_add_watch(ioc->master, 1062 cond, 1063 qio_channel_websock_flush, 1064 ioc, 1065 qio_channel_websock_flush_free); 1066 } 1067 } 1068 1069 1070 static ssize_t qio_channel_websock_readv(QIOChannel *ioc, 1071 const struct iovec *iov, 1072 size_t niov, 1073 int **fds, 1074 size_t *nfds, 1075 Error **errp) 1076 { 1077 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc); 1078 size_t i; 1079 ssize_t got = 0; 1080 ssize_t ret; 1081 1082 if (wioc->io_err) { 1083 error_propagate(errp, error_copy(wioc->io_err)); 1084 return -1; 1085 } 1086 1087 if (!wioc->rawinput.offset) { 1088 ret = qio_channel_websock_read_wire(QIO_CHANNEL_WEBSOCK(ioc), errp); 1089 if (ret < 0) { 1090 return ret; 1091 } 1092 } 1093 1094 for (i = 0 ; i < niov ; i++) { 1095 size_t want = iov[i].iov_len; 1096 if (want > (wioc->rawinput.offset - got)) { 1097 want = (wioc->rawinput.offset - got); 1098 } 1099 1100 memcpy(iov[i].iov_base, 1101 wioc->rawinput.buffer + got, 1102 want); 1103 got += want; 1104 1105 if (want < iov[i].iov_len) { 1106 break; 1107 } 1108 } 1109 1110 buffer_advance(&wioc->rawinput, got); 1111 qio_channel_websock_set_watch(wioc); 1112 return got; 1113 } 1114 1115 1116 static ssize_t qio_channel_websock_writev(QIOChannel *ioc, 1117 const struct iovec *iov, 1118 size_t niov, 1119 int *fds, 1120 size_t nfds, 1121 Error **errp) 1122 { 1123 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc); 1124 ssize_t want = iov_size(iov, niov); 1125 ssize_t avail; 1126 ssize_t ret; 1127 1128 if (wioc->io_err) { 1129 error_propagate(errp, error_copy(wioc->io_err)); 1130 return -1; 1131 } 1132 1133 if (wioc->io_eof) { 1134 error_setg(errp, "%s", "Broken pipe"); 1135 return -1; 1136 } 1137 1138 avail = wioc->encoutput.offset >= QIO_CHANNEL_WEBSOCK_MAX_BUFFER ? 1139 0 : (QIO_CHANNEL_WEBSOCK_MAX_BUFFER - wioc->encoutput.offset); 1140 if (want > avail) { 1141 want = avail; 1142 } 1143 1144 if (want) { 1145 qio_channel_websock_encode(wioc, 1146 QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME, 1147 iov, niov, want); 1148 } 1149 1150 /* Even if want == 0, we'll try write_wire in case there's 1151 * pending data we could usefully flush out 1152 */ 1153 ret = qio_channel_websock_write_wire(wioc, errp); 1154 if (ret < 0 && 1155 ret != QIO_CHANNEL_ERR_BLOCK) { 1156 qio_channel_websock_unset_watch(wioc); 1157 return -1; 1158 } 1159 1160 qio_channel_websock_set_watch(wioc); 1161 1162 if (want == 0) { 1163 return QIO_CHANNEL_ERR_BLOCK; 1164 } 1165 1166 return want; 1167 } 1168 1169 static int qio_channel_websock_set_blocking(QIOChannel *ioc, 1170 bool enabled, 1171 Error **errp) 1172 { 1173 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc); 1174 1175 qio_channel_set_blocking(wioc->master, enabled, errp); 1176 return 0; 1177 } 1178 1179 static void qio_channel_websock_set_delay(QIOChannel *ioc, 1180 bool enabled) 1181 { 1182 QIOChannelWebsock *tioc = QIO_CHANNEL_WEBSOCK(ioc); 1183 1184 qio_channel_set_delay(tioc->master, enabled); 1185 } 1186 1187 static void qio_channel_websock_set_cork(QIOChannel *ioc, 1188 bool enabled) 1189 { 1190 QIOChannelWebsock *tioc = QIO_CHANNEL_WEBSOCK(ioc); 1191 1192 qio_channel_set_cork(tioc->master, enabled); 1193 } 1194 1195 static int qio_channel_websock_shutdown(QIOChannel *ioc, 1196 QIOChannelShutdown how, 1197 Error **errp) 1198 { 1199 QIOChannelWebsock *tioc = QIO_CHANNEL_WEBSOCK(ioc); 1200 1201 return qio_channel_shutdown(tioc->master, how, errp); 1202 } 1203 1204 static int qio_channel_websock_close(QIOChannel *ioc, 1205 Error **errp) 1206 { 1207 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc); 1208 1209 trace_qio_channel_websock_close(ioc); 1210 return qio_channel_close(wioc->master, errp); 1211 } 1212 1213 typedef struct QIOChannelWebsockSource QIOChannelWebsockSource; 1214 struct QIOChannelWebsockSource { 1215 GSource parent; 1216 QIOChannelWebsock *wioc; 1217 GIOCondition condition; 1218 }; 1219 1220 static gboolean 1221 qio_channel_websock_source_check(GSource *source) 1222 { 1223 QIOChannelWebsockSource *wsource = (QIOChannelWebsockSource *)source; 1224 GIOCondition cond = 0; 1225 1226 if (wsource->wioc->rawinput.offset || wsource->wioc->io_eof) { 1227 cond |= G_IO_IN; 1228 } 1229 if (wsource->wioc->encoutput.offset < QIO_CHANNEL_WEBSOCK_MAX_BUFFER) { 1230 cond |= G_IO_OUT; 1231 } 1232 1233 return cond & wsource->condition; 1234 } 1235 1236 static gboolean 1237 qio_channel_websock_source_prepare(GSource *source, 1238 gint *timeout) 1239 { 1240 *timeout = -1; 1241 return qio_channel_websock_source_check(source); 1242 } 1243 1244 static gboolean 1245 qio_channel_websock_source_dispatch(GSource *source, 1246 GSourceFunc callback, 1247 gpointer user_data) 1248 { 1249 QIOChannelFunc func = (QIOChannelFunc)callback; 1250 QIOChannelWebsockSource *wsource = (QIOChannelWebsockSource *)source; 1251 1252 return (*func)(QIO_CHANNEL(wsource->wioc), 1253 qio_channel_websock_source_check(source), 1254 user_data); 1255 } 1256 1257 static void 1258 qio_channel_websock_source_finalize(GSource *source) 1259 { 1260 QIOChannelWebsockSource *ssource = (QIOChannelWebsockSource *)source; 1261 1262 object_unref(OBJECT(ssource->wioc)); 1263 } 1264 1265 GSourceFuncs qio_channel_websock_source_funcs = { 1266 qio_channel_websock_source_prepare, 1267 qio_channel_websock_source_check, 1268 qio_channel_websock_source_dispatch, 1269 qio_channel_websock_source_finalize 1270 }; 1271 1272 static GSource *qio_channel_websock_create_watch(QIOChannel *ioc, 1273 GIOCondition condition) 1274 { 1275 QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc); 1276 QIOChannelWebsockSource *ssource; 1277 GSource *source; 1278 1279 source = g_source_new(&qio_channel_websock_source_funcs, 1280 sizeof(QIOChannelWebsockSource)); 1281 ssource = (QIOChannelWebsockSource *)source; 1282 1283 ssource->wioc = wioc; 1284 object_ref(OBJECT(wioc)); 1285 1286 ssource->condition = condition; 1287 1288 qio_channel_websock_set_watch(wioc); 1289 return source; 1290 } 1291 1292 static void qio_channel_websock_class_init(ObjectClass *klass, 1293 void *class_data G_GNUC_UNUSED) 1294 { 1295 QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass); 1296 1297 ioc_klass->io_writev = qio_channel_websock_writev; 1298 ioc_klass->io_readv = qio_channel_websock_readv; 1299 ioc_klass->io_set_blocking = qio_channel_websock_set_blocking; 1300 ioc_klass->io_set_cork = qio_channel_websock_set_cork; 1301 ioc_klass->io_set_delay = qio_channel_websock_set_delay; 1302 ioc_klass->io_close = qio_channel_websock_close; 1303 ioc_klass->io_shutdown = qio_channel_websock_shutdown; 1304 ioc_klass->io_create_watch = qio_channel_websock_create_watch; 1305 } 1306 1307 static const TypeInfo qio_channel_websock_info = { 1308 .parent = TYPE_QIO_CHANNEL, 1309 .name = TYPE_QIO_CHANNEL_WEBSOCK, 1310 .instance_size = sizeof(QIOChannelWebsock), 1311 .instance_finalize = qio_channel_websock_finalize, 1312 .class_init = qio_channel_websock_class_init, 1313 }; 1314 1315 static void qio_channel_websock_register_types(void) 1316 { 1317 type_register_static(&qio_channel_websock_info); 1318 } 1319 1320 type_init(qio_channel_websock_register_types); 1321