1 /* 2 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson 3 * Copyright (c) 2002-2006 Niels Provos <provos (at) citi.umich.edu> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "event2/event-config.h" 30 #include "evconfig-private.h" 31 32 #include <sys/types.h> 33 34 #ifdef EVENT__HAVE_SYS_TIME_H 35 #include <sys/time.h> 36 #endif 37 38 #include <errno.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #ifdef EVENT__HAVE_STDARG_H 43 #include <stdarg.h> 44 #endif 45 #ifdef EVENT__HAVE_UNISTD_H 46 #include <unistd.h> 47 #endif 48 49 #ifdef _WIN32 50 #include <winsock2.h> 51 #include <ws2tcpip.h> 52 #endif 53 54 #ifdef EVENT__HAVE_SYS_SOCKET_H 55 #include <sys/socket.h> 56 #endif 57 #ifdef EVENT__HAVE_NETINET_IN_H 58 #include <netinet/in.h> 59 #endif 60 #ifdef EVENT__HAVE_NETINET_IN6_H 61 #include <netinet/in6.h> 62 #endif 63 64 #include "event2/util.h" 65 #include "event2/bufferevent.h" 66 #include "event2/buffer.h" 67 #include "event2/bufferevent_struct.h" 68 #include "event2/bufferevent_compat.h" 69 #include "event2/event.h" 70 #include "log-internal.h" 71 #include "mm-internal.h" 72 #include "bufferevent-internal.h" 73 #include "util-internal.h" 74 #ifdef _WIN32 75 #include "iocp-internal.h" 76 #endif 77 78 /* prototypes */ 79 static int be_socket_enable(struct bufferevent *, short); 80 static int be_socket_disable(struct bufferevent *, short); 81 static void be_socket_destruct(struct bufferevent *); 82 static int be_socket_flush(struct bufferevent *, short, enum bufferevent_flush_mode); 83 static int be_socket_ctrl(struct bufferevent *, enum bufferevent_ctrl_op, union bufferevent_ctrl_data *); 84 85 static void be_socket_setfd(struct bufferevent *, evutil_socket_t); 86 87 const struct bufferevent_ops bufferevent_ops_socket = { 88 "socket", 89 evutil_offsetof(struct bufferevent_private, bev), 90 be_socket_enable, 91 be_socket_disable, 92 NULL, /* unlink */ 93 be_socket_destruct, 94 bufferevent_generic_adj_existing_timeouts_, 95 be_socket_flush, 96 be_socket_ctrl, 97 }; 98 99 const struct sockaddr* 100 bufferevent_socket_get_conn_address_(struct bufferevent *bev) 101 { 102 struct bufferevent_private *bev_p = 103 EVUTIL_UPCAST(bev, struct bufferevent_private, bev); 104 105 return (struct sockaddr *)&bev_p->conn_address; 106 } 107 static void 108 bufferevent_socket_set_conn_address_fd(struct bufferevent_private *bev_p, int fd) 109 { 110 socklen_t len = sizeof(bev_p->conn_address); 111 112 struct sockaddr *addr = (struct sockaddr *)&bev_p->conn_address; 113 if (addr->sa_family != AF_UNSPEC) 114 getpeername(fd, addr, &len); 115 } 116 static void 117 bufferevent_socket_set_conn_address(struct bufferevent_private *bev_p, 118 struct sockaddr *addr, size_t addrlen) 119 { 120 EVUTIL_ASSERT(addrlen <= sizeof(bev_p->conn_address)); 121 memcpy(&bev_p->conn_address, addr, addrlen); 122 } 123 124 static void 125 bufferevent_socket_outbuf_cb(struct evbuffer *buf, 126 const struct evbuffer_cb_info *cbinfo, 127 void *arg) 128 { 129 struct bufferevent *bufev = arg; 130 struct bufferevent_private *bufev_p = 131 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev); 132 133 if (cbinfo->n_added && 134 (bufev->enabled & EV_WRITE) && 135 !event_pending(&bufev->ev_write, EV_WRITE, NULL) && 136 !bufev_p->write_suspended) { 137 /* Somebody added data to the buffer, and we would like to 138 * write, and we were not writing. So, start writing. */ 139 if (bufferevent_add_event_(&bufev->ev_write, &bufev->timeout_write) == -1) { 140 /* Should we log this? */ 141 } 142 } 143 } 144 145 static void 146 bufferevent_readcb(evutil_socket_t fd, short event, void *arg) 147 { 148 struct bufferevent *bufev = arg; 149 struct bufferevent_private *bufev_p = 150 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev); 151 struct evbuffer *input; 152 int res = 0; 153 short what = BEV_EVENT_READING; 154 ev_ssize_t howmuch = -1, readmax=-1; 155 156 bufferevent_incref_and_lock_(bufev); 157 158 if (event == EV_TIMEOUT) { 159 /* Note that we only check for event==EV_TIMEOUT. If 160 * event==EV_TIMEOUT|EV_READ, we can safely ignore the 161 * timeout, since a read has occurred */ 162 what |= BEV_EVENT_TIMEOUT; 163 goto error; 164 } 165 166 input = bufev->input; 167 168 /* 169 * If we have a high watermark configured then we don't want to 170 * read more data than would make us reach the watermark. 171 */ 172 if (bufev->wm_read.high != 0) { 173 howmuch = bufev->wm_read.high - evbuffer_get_length(input); 174 /* we somehow lowered the watermark, stop reading */ 175 if (howmuch <= 0) { 176 bufferevent_wm_suspend_read(bufev); 177 goto done; 178 } 179 } 180 readmax = bufferevent_get_read_max_(bufev_p); 181 if (howmuch < 0 || howmuch > readmax) /* The use of -1 for "unlimited" 182 * uglifies this code. XXXX */ 183 howmuch = readmax; 184 if (bufev_p->read_suspended) 185 goto done; 186 187 evbuffer_unfreeze(input, 0); 188 res = evbuffer_read(input, fd, (int)howmuch); /* XXXX evbuffer_read would do better to take and return ev_ssize_t */ 189 evbuffer_freeze(input, 0); 190 191 if (res == -1) { 192 int err = evutil_socket_geterror(fd); 193 if (EVUTIL_ERR_RW_RETRIABLE(err)) 194 goto reschedule; 195 if (EVUTIL_ERR_CONNECT_REFUSED(err)) { 196 bufev_p->connection_refused = 1; 197 goto done; 198 } 199 /* error case */ 200 what |= BEV_EVENT_ERROR; 201 } else if (res == 0) { 202 /* eof case */ 203 what |= BEV_EVENT_EOF; 204 } 205 206 if (res <= 0) 207 goto error; 208 209 bufferevent_decrement_read_buckets_(bufev_p, res); 210 211 /* Invoke the user callback - must always be called last */ 212 bufferevent_trigger_nolock_(bufev, EV_READ, 0); 213 214 goto done; 215 216 reschedule: 217 goto done; 218 219 error: 220 bufferevent_disable(bufev, EV_READ); 221 bufferevent_run_eventcb_(bufev, what, 0); 222 223 done: 224 bufferevent_decref_and_unlock_(bufev); 225 } 226 227 static void 228 bufferevent_writecb(evutil_socket_t fd, short event, void *arg) 229 { 230 struct bufferevent *bufev = arg; 231 struct bufferevent_private *bufev_p = 232 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev); 233 int res = 0; 234 short what = BEV_EVENT_WRITING; 235 int connected = 0; 236 ev_ssize_t atmost = -1; 237 238 bufferevent_incref_and_lock_(bufev); 239 240 if (event == EV_TIMEOUT) { 241 /* Note that we only check for event==EV_TIMEOUT. If 242 * event==EV_TIMEOUT|EV_WRITE, we can safely ignore the 243 * timeout, since a read has occurred */ 244 what |= BEV_EVENT_TIMEOUT; 245 goto error; 246 } 247 if (bufev_p->connecting) { 248 int c = evutil_socket_finished_connecting_(fd); 249 /* we need to fake the error if the connection was refused 250 * immediately - usually connection to localhost on BSD */ 251 if (bufev_p->connection_refused) { 252 bufev_p->connection_refused = 0; 253 c = -1; 254 } 255 256 if (c == 0) 257 goto done; 258 259 bufev_p->connecting = 0; 260 if (c < 0) { 261 event_del(&bufev->ev_write); 262 event_del(&bufev->ev_read); 263 bufferevent_run_eventcb_(bufev, BEV_EVENT_ERROR, 0); 264 goto done; 265 } else { 266 connected = 1; 267 bufferevent_socket_set_conn_address_fd(bufev_p, fd); 268 #ifdef _WIN32 269 if (BEV_IS_ASYNC(bufev)) { 270 event_del(&bufev->ev_write); 271 bufferevent_async_set_connected_(bufev); 272 bufferevent_run_eventcb_(bufev, 273 BEV_EVENT_CONNECTED, 0); 274 goto done; 275 } 276 #endif 277 bufferevent_run_eventcb_(bufev, 278 BEV_EVENT_CONNECTED, 0); 279 if (!(bufev->enabled & EV_WRITE) || 280 bufev_p->write_suspended) { 281 event_del(&bufev->ev_write); 282 goto done; 283 } 284 } 285 } 286 287 atmost = bufferevent_get_write_max_(bufev_p); 288 289 if (bufev_p->write_suspended) 290 goto done; 291 292 if (evbuffer_get_length(bufev->output)) { 293 evbuffer_unfreeze(bufev->output, 1); 294 res = evbuffer_write_atmost(bufev->output, fd, atmost); 295 evbuffer_freeze(bufev->output, 1); 296 if (res == -1) { 297 int err = evutil_socket_geterror(fd); 298 if (EVUTIL_ERR_RW_RETRIABLE(err)) 299 goto reschedule; 300 what |= BEV_EVENT_ERROR; 301 } else if (res == 0) { 302 /* eof case 303 XXXX Actually, a 0 on write doesn't indicate 304 an EOF. An ECONNRESET might be more typical. 305 */ 306 what |= BEV_EVENT_EOF; 307 } 308 if (res <= 0) 309 goto error; 310 311 bufferevent_decrement_write_buckets_(bufev_p, res); 312 } 313 314 if (evbuffer_get_length(bufev->output) == 0) { 315 event_del(&bufev->ev_write); 316 } 317 318 /* 319 * Invoke the user callback if our buffer is drained or below the 320 * low watermark. 321 */ 322 if (res || !connected) { 323 bufferevent_trigger_nolock_(bufev, EV_WRITE, 0); 324 } 325 326 goto done; 327 328 reschedule: 329 if (evbuffer_get_length(bufev->output) == 0) { 330 event_del(&bufev->ev_write); 331 } 332 goto done; 333 334 error: 335 bufferevent_disable(bufev, EV_WRITE); 336 bufferevent_run_eventcb_(bufev, what, 0); 337 338 done: 339 bufferevent_decref_and_unlock_(bufev); 340 } 341 342 struct bufferevent * 343 bufferevent_socket_new(struct event_base *base, evutil_socket_t fd, 344 int options) 345 { 346 struct bufferevent_private *bufev_p; 347 struct bufferevent *bufev; 348 349 #ifdef _WIN32 350 if (base && event_base_get_iocp_(base)) 351 return bufferevent_async_new_(base, fd, options); 352 #endif 353 354 if ((bufev_p = mm_calloc(1, sizeof(struct bufferevent_private)))== NULL) 355 return NULL; 356 357 if (bufferevent_init_common_(bufev_p, base, &bufferevent_ops_socket, 358 options) < 0) { 359 mm_free(bufev_p); 360 return NULL; 361 } 362 bufev = &bufev_p->bev; 363 evbuffer_set_flags(bufev->output, EVBUFFER_FLAG_DRAINS_TO_FD); 364 365 event_assign(&bufev->ev_read, bufev->ev_base, fd, 366 EV_READ|EV_PERSIST|EV_FINALIZE, bufferevent_readcb, bufev); 367 event_assign(&bufev->ev_write, bufev->ev_base, fd, 368 EV_WRITE|EV_PERSIST|EV_FINALIZE, bufferevent_writecb, bufev); 369 370 evbuffer_add_cb(bufev->output, bufferevent_socket_outbuf_cb, bufev); 371 372 evbuffer_freeze(bufev->input, 0); 373 evbuffer_freeze(bufev->output, 1); 374 375 return bufev; 376 } 377 378 int 379 bufferevent_socket_connect(struct bufferevent *bev, 380 const struct sockaddr *sa, int socklen) 381 { 382 struct bufferevent_private *bufev_p = 383 EVUTIL_UPCAST(bev, struct bufferevent_private, bev); 384 385 evutil_socket_t fd; 386 int r = 0; 387 int result=-1; 388 int ownfd = 0; 389 390 bufferevent_incref_and_lock_(bev); 391 392 if (!bufev_p) 393 goto done; 394 395 fd = bufferevent_getfd(bev); 396 if (fd < 0) { 397 if (!sa) 398 goto done; 399 fd = evutil_socket_(sa->sa_family, 400 SOCK_STREAM|EVUTIL_SOCK_NONBLOCK, 0); 401 if (fd < 0) 402 goto done; 403 ownfd = 1; 404 } 405 if (sa) { 406 #ifdef _WIN32 407 if (bufferevent_async_can_connect_(bev)) { 408 bufferevent_setfd(bev, fd); 409 r = bufferevent_async_connect_(bev, fd, sa, socklen); 410 if (r < 0) 411 goto freesock; 412 bufev_p->connecting = 1; 413 result = 0; 414 goto done; 415 } else 416 #endif 417 r = evutil_socket_connect_(&fd, sa, socklen); 418 if (r < 0) 419 goto freesock; 420 } 421 #ifdef _WIN32 422 /* ConnectEx() isn't always around, even when IOCP is enabled. 423 * Here, we borrow the socket object's write handler to fall back 424 * on a non-blocking connect() when ConnectEx() is unavailable. */ 425 if (BEV_IS_ASYNC(bev)) { 426 event_assign(&bev->ev_write, bev->ev_base, fd, 427 EV_WRITE|EV_PERSIST|EV_FINALIZE, bufferevent_writecb, bev); 428 } 429 #endif 430 bufferevent_setfd(bev, fd); 431 if (r == 0) { 432 if (! be_socket_enable(bev, EV_WRITE)) { 433 bufev_p->connecting = 1; 434 result = 0; 435 goto done; 436 } 437 } else if (r == 1) { 438 /* The connect succeeded already. How very BSD of it. */ 439 result = 0; 440 bufev_p->connecting = 1; 441 bufferevent_trigger_nolock_(bev, EV_WRITE, BEV_OPT_DEFER_CALLBACKS); 442 } else { 443 /* The connect failed already. How very BSD of it. */ 444 result = 0; 445 bufferevent_run_eventcb_(bev, BEV_EVENT_ERROR, BEV_OPT_DEFER_CALLBACKS); 446 bufferevent_disable(bev, EV_WRITE|EV_READ); 447 } 448 449 goto done; 450 451 freesock: 452 bufferevent_run_eventcb_(bev, BEV_EVENT_ERROR, 0); 453 if (ownfd) 454 evutil_closesocket(fd); 455 /* do something about the error? */ 456 done: 457 bufferevent_decref_and_unlock_(bev); 458 return result; 459 } 460 461 static void 462 bufferevent_connect_getaddrinfo_cb(int result, struct evutil_addrinfo *ai, 463 void *arg) 464 { 465 struct bufferevent *bev = arg; 466 struct bufferevent_private *bev_p = 467 EVUTIL_UPCAST(bev, struct bufferevent_private, bev); 468 int r; 469 BEV_LOCK(bev); 470 471 bufferevent_unsuspend_write_(bev, BEV_SUSPEND_LOOKUP); 472 bufferevent_unsuspend_read_(bev, BEV_SUSPEND_LOOKUP); 473 474 bev_p->dns_request = NULL; 475 476 if (result == EVUTIL_EAI_CANCEL) { 477 bev_p->dns_error = result; 478 bufferevent_decref_and_unlock_(bev); 479 return; 480 } 481 if (result != 0) { 482 bev_p->dns_error = result; 483 bufferevent_run_eventcb_(bev, BEV_EVENT_ERROR, 0); 484 bufferevent_decref_and_unlock_(bev); 485 if (ai) 486 evutil_freeaddrinfo(ai); 487 return; 488 } 489 490 /* XXX use the other addrinfos? */ 491 /* XXX use this return value */ 492 bufferevent_socket_set_conn_address(bev_p, ai->ai_addr, (int)ai->ai_addrlen); 493 r = bufferevent_socket_connect(bev, ai->ai_addr, (int)ai->ai_addrlen); 494 (void)r; 495 bufferevent_decref_and_unlock_(bev); 496 evutil_freeaddrinfo(ai); 497 } 498 499 int 500 bufferevent_socket_connect_hostname(struct bufferevent *bev, 501 struct evdns_base *evdns_base, int family, const char *hostname, int port) 502 { 503 char portbuf[10]; 504 struct evutil_addrinfo hint; 505 struct bufferevent_private *bev_p = 506 EVUTIL_UPCAST(bev, struct bufferevent_private, bev); 507 508 if (family != AF_INET && family != AF_INET6 && family != AF_UNSPEC) 509 return -1; 510 if (port < 1 || port > 65535) 511 return -1; 512 513 memset(&hint, 0, sizeof(hint)); 514 hint.ai_family = family; 515 hint.ai_protocol = IPPROTO_TCP; 516 hint.ai_socktype = SOCK_STREAM; 517 518 evutil_snprintf(portbuf, sizeof(portbuf), "%d", port); 519 520 BEV_LOCK(bev); 521 bev_p->dns_error = 0; 522 523 bufferevent_suspend_write_(bev, BEV_SUSPEND_LOOKUP); 524 bufferevent_suspend_read_(bev, BEV_SUSPEND_LOOKUP); 525 526 bufferevent_incref_(bev); 527 bev_p->dns_request = evutil_getaddrinfo_async_(evdns_base, hostname, 528 portbuf, &hint, bufferevent_connect_getaddrinfo_cb, bev); 529 BEV_UNLOCK(bev); 530 531 return 0; 532 } 533 534 int 535 bufferevent_socket_get_dns_error(struct bufferevent *bev) 536 { 537 int rv; 538 struct bufferevent_private *bev_p = 539 EVUTIL_UPCAST(bev, struct bufferevent_private, bev); 540 541 BEV_LOCK(bev); 542 rv = bev_p->dns_error; 543 BEV_UNLOCK(bev); 544 545 return rv; 546 } 547 548 /* 549 * Create a new buffered event object. 550 * 551 * The read callback is invoked whenever we read new data. 552 * The write callback is invoked whenever the output buffer is drained. 553 * The error callback is invoked on a write/read error or on EOF. 554 * 555 * Both read and write callbacks maybe NULL. The error callback is not 556 * allowed to be NULL and have to be provided always. 557 */ 558 559 struct bufferevent * 560 bufferevent_new(evutil_socket_t fd, 561 bufferevent_data_cb readcb, bufferevent_data_cb writecb, 562 bufferevent_event_cb eventcb, void *cbarg) 563 { 564 struct bufferevent *bufev; 565 566 if (!(bufev = bufferevent_socket_new(NULL, fd, 0))) 567 return NULL; 568 569 bufferevent_setcb(bufev, readcb, writecb, eventcb, cbarg); 570 571 return bufev; 572 } 573 574 575 static int 576 be_socket_enable(struct bufferevent *bufev, short event) 577 { 578 if (event & EV_READ && 579 bufferevent_add_event_(&bufev->ev_read, &bufev->timeout_read) == -1) 580 return -1; 581 if (event & EV_WRITE && 582 bufferevent_add_event_(&bufev->ev_write, &bufev->timeout_write) == -1) 583 return -1; 584 return 0; 585 } 586 587 static int 588 be_socket_disable(struct bufferevent *bufev, short event) 589 { 590 struct bufferevent_private *bufev_p = 591 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev); 592 if (event & EV_READ) { 593 if (event_del(&bufev->ev_read) == -1) 594 return -1; 595 } 596 /* Don't actually disable the write if we are trying to connect. */ 597 if ((event & EV_WRITE) && ! bufev_p->connecting) { 598 if (event_del(&bufev->ev_write) == -1) 599 return -1; 600 } 601 return 0; 602 } 603 604 static void 605 be_socket_destruct(struct bufferevent *bufev) 606 { 607 struct bufferevent_private *bufev_p = 608 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev); 609 evutil_socket_t fd; 610 EVUTIL_ASSERT(bufev->be_ops == &bufferevent_ops_socket); 611 612 fd = event_get_fd(&bufev->ev_read); 613 614 if ((bufev_p->options & BEV_OPT_CLOSE_ON_FREE) && fd >= 0) 615 EVUTIL_CLOSESOCKET(fd); 616 617 evutil_getaddrinfo_cancel_async_(bufev_p->dns_request); 618 } 619 620 static int 621 be_socket_flush(struct bufferevent *bev, short iotype, 622 enum bufferevent_flush_mode mode) 623 { 624 return 0; 625 } 626 627 628 static void 629 be_socket_setfd(struct bufferevent *bufev, evutil_socket_t fd) 630 { 631 struct bufferevent_private *bufev_p = 632 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev); 633 634 BEV_LOCK(bufev); 635 EVUTIL_ASSERT(bufev->be_ops == &bufferevent_ops_socket); 636 637 event_del(&bufev->ev_read); 638 event_del(&bufev->ev_write); 639 640 evbuffer_unfreeze(bufev->input, 0); 641 evbuffer_unfreeze(bufev->output, 1); 642 643 event_assign(&bufev->ev_read, bufev->ev_base, fd, 644 EV_READ|EV_PERSIST|EV_FINALIZE, bufferevent_readcb, bufev); 645 event_assign(&bufev->ev_write, bufev->ev_base, fd, 646 EV_WRITE|EV_PERSIST|EV_FINALIZE, bufferevent_writecb, bufev); 647 648 if (fd >= 0) 649 bufferevent_enable(bufev, bufev->enabled); 650 651 evutil_getaddrinfo_cancel_async_(bufev_p->dns_request); 652 653 BEV_UNLOCK(bufev); 654 } 655 656 /* XXXX Should non-socket bufferevents support this? */ 657 int 658 bufferevent_priority_set(struct bufferevent *bufev, int priority) 659 { 660 int r = -1; 661 struct bufferevent_private *bufev_p = 662 EVUTIL_UPCAST(bufev, struct bufferevent_private, bev); 663 664 BEV_LOCK(bufev); 665 if (bufev->be_ops != &bufferevent_ops_socket) 666 goto done; 667 668 if (event_priority_set(&bufev->ev_read, priority) == -1) 669 goto done; 670 if (event_priority_set(&bufev->ev_write, priority) == -1) 671 goto done; 672 673 event_deferred_cb_set_priority_(&bufev_p->deferred, priority); 674 675 r = 0; 676 done: 677 BEV_UNLOCK(bufev); 678 return r; 679 } 680 681 /* XXXX Should non-socket bufferevents support this? */ 682 int 683 bufferevent_base_set(struct event_base *base, struct bufferevent *bufev) 684 { 685 int res = -1; 686 687 BEV_LOCK(bufev); 688 if (bufev->be_ops != &bufferevent_ops_socket) 689 goto done; 690 691 bufev->ev_base = base; 692 693 res = event_base_set(base, &bufev->ev_read); 694 if (res == -1) 695 goto done; 696 697 res = event_base_set(base, &bufev->ev_write); 698 done: 699 BEV_UNLOCK(bufev); 700 return res; 701 } 702 703 static int 704 be_socket_ctrl(struct bufferevent *bev, enum bufferevent_ctrl_op op, 705 union bufferevent_ctrl_data *data) 706 { 707 switch (op) { 708 case BEV_CTRL_SET_FD: 709 be_socket_setfd(bev, data->fd); 710 return 0; 711 case BEV_CTRL_GET_FD: 712 data->fd = event_get_fd(&bev->ev_read); 713 return 0; 714 case BEV_CTRL_GET_UNDERLYING: 715 case BEV_CTRL_CANCEL_ALL: 716 default: 717 return -1; 718 } 719 } 720
