1/* 2 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson 3 * Copyright (c) 2002-2006 Niels Provos <provos@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 */ 79static int be_socket_enable(struct bufferevent *, short); 80static int be_socket_disable(struct bufferevent *, short); 81static void be_socket_destruct(struct bufferevent *); 82static int be_socket_flush(struct bufferevent *, short, enum bufferevent_flush_mode); 83static int be_socket_ctrl(struct bufferevent *, enum bufferevent_ctrl_op, union bufferevent_ctrl_data *); 84 85static void be_socket_setfd(struct bufferevent *, evutil_socket_t); 86 87const 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 99const struct sockaddr* 100bufferevent_socket_get_conn_address_(struct bufferevent *bev) 101{ 102 struct bufferevent_private *bev_p = BEV_UPCAST(bev); 103 return (struct sockaddr *)&bev_p->conn_address; 104} 105 106void 107bufferevent_socket_set_conn_address_fd_(struct bufferevent *bev, 108 evutil_socket_t fd) 109{ 110 struct bufferevent_private *bev_p = BEV_UPCAST(bev); 111 112 socklen_t len = sizeof(bev_p->conn_address); 113 114 struct sockaddr *addr = (struct sockaddr *)&bev_p->conn_address; 115 if (addr->sa_family != AF_UNSPEC) 116 getpeername(fd, addr, &len); 117} 118 119void 120bufferevent_socket_set_conn_address_(struct bufferevent *bev, 121 struct sockaddr *addr, size_t addrlen) 122{ 123 struct bufferevent_private *bev_p = BEV_UPCAST(bev); 124 EVUTIL_ASSERT(addrlen <= sizeof(bev_p->conn_address)); 125 memcpy(&bev_p->conn_address, addr, addrlen); 126} 127 128static void 129bufferevent_socket_outbuf_cb(struct evbuffer *buf, 130 const struct evbuffer_cb_info *cbinfo, 131 void *arg) 132{ 133 struct bufferevent *bufev = arg; 134 struct bufferevent_private *bufev_p = BEV_UPCAST(bufev); 135 136 if (cbinfo->n_added && 137 (bufev->enabled & EV_WRITE) && 138 !event_pending(&bufev->ev_write, EV_WRITE, NULL) && 139 !bufev_p->write_suspended) { 140 /* Somebody added data to the buffer, and we would like to 141 * write, and we were not writing. So, start writing. */ 142 if (bufferevent_add_event_(&bufev->ev_write, &bufev->timeout_write) == -1) { 143 /* Should we log this? */ 144 } 145 } 146} 147 148static void 149bufferevent_readcb(evutil_socket_t fd, short event, void *arg) 150{ 151 struct bufferevent *bufev = arg; 152 struct bufferevent_private *bufev_p = BEV_UPCAST(bufev); 153 struct evbuffer *input; 154 int res = 0; 155 short what = BEV_EVENT_READING; 156 ev_ssize_t howmuch = -1, readmax=-1; 157 158 bufferevent_incref_and_lock_(bufev); 159 160 if (event == EV_TIMEOUT) { 161 /* Note that we only check for event==EV_TIMEOUT. If 162 * event==EV_TIMEOUT|EV_READ, we can safely ignore the 163 * timeout, since a read has occurred */ 164 what |= BEV_EVENT_TIMEOUT; 165 goto error; 166 } 167 168 input = bufev->input; 169 170 /* 171 * If we have a high watermark configured then we don't want to 172 * read more data than would make us reach the watermark. 173 */ 174 if (bufev->wm_read.high != 0) { 175 howmuch = bufev->wm_read.high - evbuffer_get_length(input); 176 /* we somehow lowered the watermark, stop reading */ 177 if (howmuch <= 0) { 178 bufferevent_wm_suspend_read(bufev); 179 goto done; 180 } 181 } 182 readmax = bufferevent_get_read_max_(bufev_p); 183 if (howmuch < 0 || howmuch > readmax) /* The use of -1 for "unlimited" 184 * uglifies this code. XXXX */ 185 howmuch = readmax; 186 if (bufev_p->read_suspended) 187 goto done; 188 189 evbuffer_unfreeze(input, 0); 190 res = evbuffer_read(input, fd, (int)howmuch); /* XXXX evbuffer_read would do better to take and return ev_ssize_t */ 191 evbuffer_freeze(input, 0); 192 193 if (res == -1) { 194 int err = evutil_socket_geterror(fd); 195 if (EVUTIL_ERR_RW_RETRIABLE(err)) 196 goto reschedule; 197 if (EVUTIL_ERR_CONNECT_REFUSED(err)) { 198 bufev_p->connection_refused = 1; 199 goto done; 200 } 201 /* error case */ 202 what |= BEV_EVENT_ERROR; 203 } else if (res == 0) { 204 /* eof case */ 205 what |= BEV_EVENT_EOF; 206 } 207 208 if (res <= 0) 209 goto error; 210 211 bufferevent_decrement_read_buckets_(bufev_p, res); 212 213 /* Invoke the user callback - must always be called last */ 214 bufferevent_trigger_nolock_(bufev, EV_READ, 0); 215 216 goto done; 217 218 reschedule: 219 goto done; 220 221 error: 222 bufferevent_disable(bufev, EV_READ); 223 bufferevent_run_eventcb_(bufev, what, 0); 224 225 done: 226 bufferevent_decref_and_unlock_(bufev); 227} 228 229static void 230bufferevent_writecb(evutil_socket_t fd, short event, void *arg) 231{ 232 struct bufferevent *bufev = arg; 233 struct bufferevent_private *bufev_p = BEV_UPCAST(bufev); 234 int res = 0; 235 short what = BEV_EVENT_WRITING; 236 int connected = 0; 237 ev_ssize_t atmost = -1; 238 239 bufferevent_incref_and_lock_(bufev); 240 241 if (event == EV_TIMEOUT) { 242 /* Note that we only check for event==EV_TIMEOUT. If 243 * event==EV_TIMEOUT|EV_WRITE, we can safely ignore the 244 * timeout, since a read has occurred */ 245 what |= BEV_EVENT_TIMEOUT; 246 goto error; 247 } 248 if (bufev_p->connecting) { 249 int c = evutil_socket_finished_connecting_(fd); 250 /* we need to fake the error if the connection was refused 251 * immediately - usually connection to localhost on BSD */ 252 if (bufev_p->connection_refused) { 253 bufev_p->connection_refused = 0; 254 c = -1; 255 } 256 257 if (c == 0) 258 goto done; 259 260 bufev_p->connecting = 0; 261 if (c < 0) { 262 event_del(&bufev->ev_write); 263 event_del(&bufev->ev_read); 264 bufferevent_run_eventcb_(bufev, BEV_EVENT_ERROR, 0); 265 goto done; 266 } else { 267 connected = 1; 268 bufferevent_socket_set_conn_address_fd_(bufev, fd); 269#ifdef _WIN32 270 if (BEV_IS_ASYNC(bufev)) { 271 event_del(&bufev->ev_write); 272 bufferevent_async_set_connected_(bufev); 273 bufferevent_run_eventcb_(bufev, 274 BEV_EVENT_CONNECTED, 0); 275 goto done; 276 } 277#endif 278 bufferevent_run_eventcb_(bufev, 279 BEV_EVENT_CONNECTED, 0); 280 if (!(bufev->enabled & EV_WRITE) || 281 bufev_p->write_suspended) { 282 event_del(&bufev->ev_write); 283 goto done; 284 } 285 } 286 } 287 288 atmost = bufferevent_get_write_max_(bufev_p); 289 290 if (bufev_p->write_suspended) 291 goto done; 292 293 if (evbuffer_get_length(bufev->output)) { 294 evbuffer_unfreeze(bufev->output, 1); 295 res = evbuffer_write_atmost(bufev->output, fd, atmost); 296 evbuffer_freeze(bufev->output, 1); 297 if (res == -1) { 298 int err = evutil_socket_geterror(fd); 299 if (EVUTIL_ERR_RW_RETRIABLE(err)) 300 goto reschedule; 301 what |= BEV_EVENT_ERROR; 302 } else if (res == 0) { 303 /* eof case 304 XXXX Actually, a 0 on write doesn't indicate 305 an EOF. An ECONNRESET might be more typical. 306 */ 307 what |= BEV_EVENT_EOF; 308 } 309 if (res <= 0) 310 goto error; 311 312 bufferevent_decrement_write_buckets_(bufev_p, res); 313 } 314 315 if (evbuffer_get_length(bufev->output) == 0) { 316 event_del(&bufev->ev_write); 317 } 318 319 /* 320 * Invoke the user callback if our buffer is drained or below the 321 * low watermark. 322 */ 323 if (res || !connected) { 324 bufferevent_trigger_nolock_(bufev, EV_WRITE, 0); 325 } 326 327 goto done; 328 329 reschedule: 330 if (evbuffer_get_length(bufev->output) == 0) { 331 event_del(&bufev->ev_write); 332 } 333 goto done; 334 335 error: 336 bufferevent_disable(bufev, EV_WRITE); 337 bufferevent_run_eventcb_(bufev, what, 0); 338 339 done: 340 bufferevent_decref_and_unlock_(bufev); 341} 342 343struct bufferevent * 344bufferevent_socket_new(struct event_base *base, evutil_socket_t fd, 345 int options) 346{ 347 struct bufferevent_private *bufev_p; 348 struct bufferevent *bufev; 349 350#ifdef _WIN32 351 if (base && event_base_get_iocp_(base)) 352 return bufferevent_async_new_(base, fd, options); 353#endif 354 355 if ((bufev_p = mm_calloc(1, sizeof(struct bufferevent_private)))== NULL) 356 return NULL; 357 358 if (bufferevent_init_common_(bufev_p, base, &bufferevent_ops_socket, 359 options) < 0) { 360 mm_free(bufev_p); 361 return NULL; 362 } 363 bufev = &bufev_p->bev; 364 evbuffer_set_flags(bufev->output, EVBUFFER_FLAG_DRAINS_TO_FD); 365 366 event_assign(&bufev->ev_read, bufev->ev_base, fd, 367 EV_READ|EV_PERSIST|EV_FINALIZE, bufferevent_readcb, bufev); 368 event_assign(&bufev->ev_write, bufev->ev_base, fd, 369 EV_WRITE|EV_PERSIST|EV_FINALIZE, bufferevent_writecb, bufev); 370 371 evbuffer_add_cb(bufev->output, bufferevent_socket_outbuf_cb, bufev); 372 373 evbuffer_freeze(bufev->input, 0); 374 evbuffer_freeze(bufev->output, 1); 375 376 return bufev; 377} 378 379int 380bufferevent_socket_connect(struct bufferevent *bev, 381 const struct sockaddr *sa, int socklen) 382{ 383 struct bufferevent_private *bufev_p = BEV_UPCAST(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 fd = bufferevent_getfd(bev); 393 if (fd < 0) { 394 if (!sa) 395 goto done; 396 fd = evutil_socket_(sa->sa_family, 397 SOCK_STREAM|EVUTIL_SOCK_NONBLOCK, 0); 398 if (fd < 0) 399 goto freesock; 400 ownfd = 1; 401 } 402 if (sa) { 403#ifdef _WIN32 404 if (bufferevent_async_can_connect_(bev)) { 405 bufferevent_setfd(bev, fd); 406 r = bufferevent_async_connect_(bev, fd, sa, socklen); 407 if (r < 0) 408 goto freesock; 409 bufev_p->connecting = 1; 410 result = 0; 411 goto done; 412 } else 413#endif 414 r = evutil_socket_connect_(&fd, sa, socklen); 415 if (r < 0) 416 goto freesock; 417 } 418#ifdef _WIN32 419 /* ConnectEx() isn't always around, even when IOCP is enabled. 420 * Here, we borrow the socket object's write handler to fall back 421 * on a non-blocking connect() when ConnectEx() is unavailable. */ 422 if (BEV_IS_ASYNC(bev)) { 423 event_assign(&bev->ev_write, bev->ev_base, fd, 424 EV_WRITE|EV_PERSIST|EV_FINALIZE, bufferevent_writecb, bev); 425 } 426#endif 427 bufferevent_setfd(bev, fd); 428 if (r == 0) { 429 if (! be_socket_enable(bev, EV_WRITE)) { 430 bufev_p->connecting = 1; 431 result = 0; 432 goto done; 433 } 434 } else if (r == 1) { 435 /* The connect succeeded already. How very BSD of it. */ 436 result = 0; 437 bufev_p->connecting = 1; 438 bufferevent_trigger_nolock_(bev, EV_WRITE, BEV_OPT_DEFER_CALLBACKS); 439 } else { 440 /* The connect failed already. How very BSD of it. */ 441 result = 0; 442 bufferevent_run_eventcb_(bev, BEV_EVENT_ERROR, BEV_OPT_DEFER_CALLBACKS); 443 bufferevent_disable(bev, EV_WRITE|EV_READ); 444 } 445 446 goto done; 447 448freesock: 449 if (ownfd) 450 evutil_closesocket(fd); 451done: 452 bufferevent_decref_and_unlock_(bev); 453 return result; 454} 455 456static void 457bufferevent_connect_getaddrinfo_cb(int result, struct evutil_addrinfo *ai, 458 void *arg) 459{ 460 struct bufferevent *bev = arg; 461 struct bufferevent_private *bev_p = BEV_UPCAST(bev); 462 int r; 463 BEV_LOCK(bev); 464 465 bufferevent_unsuspend_write_(bev, BEV_SUSPEND_LOOKUP); 466 bufferevent_unsuspend_read_(bev, BEV_SUSPEND_LOOKUP); 467 468 bev_p->dns_request = NULL; 469 470 if (result == EVUTIL_EAI_CANCEL) { 471 bev_p->dns_error = result; 472 bufferevent_decref_and_unlock_(bev); 473 return; 474 } 475 if (result != 0) { 476 bev_p->dns_error = result; 477 bufferevent_run_eventcb_(bev, BEV_EVENT_ERROR, 0); 478 bufferevent_decref_and_unlock_(bev); 479 if (ai) 480 evutil_freeaddrinfo(ai); 481 return; 482 } 483 484 /* XXX use the other addrinfos? */ 485 bufferevent_socket_set_conn_address_(bev, ai->ai_addr, (int)ai->ai_addrlen); 486 r = bufferevent_socket_connect(bev, ai->ai_addr, (int)ai->ai_addrlen); 487 if (r < 0) 488 bufferevent_run_eventcb_(bev, BEV_EVENT_ERROR, 0); 489 bufferevent_decref_and_unlock_(bev); 490 evutil_freeaddrinfo(ai); 491} 492 493int 494bufferevent_socket_connect_hostname(struct bufferevent *bev, 495 struct evdns_base *evdns_base, int family, const char *hostname, int port) 496{ 497 char portbuf[10]; 498 struct evutil_addrinfo hint; 499 struct bufferevent_private *bev_p = BEV_UPCAST(bev); 500 501 if (family != AF_INET && family != AF_INET6 && family != AF_UNSPEC) 502 return -1; 503 if (port < 1 || port > 65535) 504 return -1; 505 506 memset(&hint, 0, sizeof(hint)); 507 hint.ai_family = family; 508 hint.ai_protocol = IPPROTO_TCP; 509 hint.ai_socktype = SOCK_STREAM; 510 511 evutil_snprintf(portbuf, sizeof(portbuf), "%d", port); 512 513 BEV_LOCK(bev); 514 bev_p->dns_error = 0; 515 516 bufferevent_suspend_write_(bev, BEV_SUSPEND_LOOKUP); 517 bufferevent_suspend_read_(bev, BEV_SUSPEND_LOOKUP); 518 519 bufferevent_incref_(bev); 520 bev_p->dns_request = evutil_getaddrinfo_async_(evdns_base, hostname, 521 portbuf, &hint, bufferevent_connect_getaddrinfo_cb, bev); 522 BEV_UNLOCK(bev); 523 524 return 0; 525} 526 527int 528bufferevent_socket_get_dns_error(struct bufferevent *bev) 529{ 530 int rv; 531 struct bufferevent_private *bev_p = BEV_UPCAST(bev); 532 533 BEV_LOCK(bev); 534 rv = bev_p->dns_error; 535 BEV_UNLOCK(bev); 536 537 return rv; 538} 539 540/* 541 * Create a new buffered event object. 542 * 543 * The read callback is invoked whenever we read new data. 544 * The write callback is invoked whenever the output buffer is drained. 545 * The error callback is invoked on a write/read error or on EOF. 546 * 547 * Both read and write callbacks maybe NULL. The error callback is not 548 * allowed to be NULL and have to be provided always. 549 */ 550 551struct bufferevent * 552bufferevent_new(evutil_socket_t fd, 553 bufferevent_data_cb readcb, bufferevent_data_cb writecb, 554 bufferevent_event_cb eventcb, void *cbarg) 555{ 556 struct bufferevent *bufev; 557 558 if (!(bufev = bufferevent_socket_new(NULL, fd, 0))) 559 return NULL; 560 561 bufferevent_setcb(bufev, readcb, writecb, eventcb, cbarg); 562 563 return bufev; 564} 565 566 567static int 568be_socket_enable(struct bufferevent *bufev, short event) 569{ 570 if (event & EV_READ && 571 bufferevent_add_event_(&bufev->ev_read, &bufev->timeout_read) == -1) 572 return -1; 573 if (event & EV_WRITE && 574 bufferevent_add_event_(&bufev->ev_write, &bufev->timeout_write) == -1) 575 return -1; 576 return 0; 577} 578 579static int 580be_socket_disable(struct bufferevent *bufev, short event) 581{ 582 struct bufferevent_private *bufev_p = BEV_UPCAST(bufev); 583 if (event & EV_READ) { 584 if (event_del(&bufev->ev_read) == -1) 585 return -1; 586 } 587 /* Don't actually disable the write if we are trying to connect. */ 588 if ((event & EV_WRITE) && ! bufev_p->connecting) { 589 if (event_del(&bufev->ev_write) == -1) 590 return -1; 591 } 592 return 0; 593} 594 595static void 596be_socket_destruct(struct bufferevent *bufev) 597{ 598 struct bufferevent_private *bufev_p = BEV_UPCAST(bufev); 599 evutil_socket_t fd; 600 EVUTIL_ASSERT(BEV_IS_SOCKET(bufev)); 601 602 fd = event_get_fd(&bufev->ev_read); 603 604 if ((bufev_p->options & BEV_OPT_CLOSE_ON_FREE) && fd >= 0) 605 EVUTIL_CLOSESOCKET(fd); 606 607 evutil_getaddrinfo_cancel_async_(bufev_p->dns_request); 608} 609 610static int 611be_socket_flush(struct bufferevent *bev, short iotype, 612 enum bufferevent_flush_mode mode) 613{ 614 return 0; 615} 616 617 618static void 619be_socket_setfd(struct bufferevent *bufev, evutil_socket_t fd) 620{ 621 struct bufferevent_private *bufev_p = BEV_UPCAST(bufev); 622 623 BEV_LOCK(bufev); 624 EVUTIL_ASSERT(BEV_IS_SOCKET(bufev)); 625 626 event_del(&bufev->ev_read); 627 event_del(&bufev->ev_write); 628 629 evbuffer_unfreeze(bufev->input, 0); 630 evbuffer_unfreeze(bufev->output, 1); 631 632 event_assign(&bufev->ev_read, bufev->ev_base, fd, 633 EV_READ|EV_PERSIST|EV_FINALIZE, bufferevent_readcb, bufev); 634 event_assign(&bufev->ev_write, bufev->ev_base, fd, 635 EV_WRITE|EV_PERSIST|EV_FINALIZE, bufferevent_writecb, bufev); 636 637 if (fd >= 0) 638 bufferevent_enable(bufev, bufev->enabled); 639 640 evutil_getaddrinfo_cancel_async_(bufev_p->dns_request); 641 642 BEV_UNLOCK(bufev); 643} 644 645/* XXXX Should non-socket bufferevents support this? */ 646int 647bufferevent_priority_set(struct bufferevent *bufev, int priority) 648{ 649 int r = -1; 650 struct bufferevent_private *bufev_p = BEV_UPCAST(bufev); 651 652 BEV_LOCK(bufev); 653 if (BEV_IS_ASYNC(bufev) || BEV_IS_FILTER(bufev) || BEV_IS_PAIR(bufev)) 654 goto done; 655 656 if (event_priority_set(&bufev->ev_read, priority) == -1) 657 goto done; 658 if (event_priority_set(&bufev->ev_write, priority) == -1) 659 goto done; 660 661 event_deferred_cb_set_priority_(&bufev_p->deferred, priority); 662 663 r = 0; 664done: 665 BEV_UNLOCK(bufev); 666 return r; 667} 668 669/* XXXX Should non-socket bufferevents support this? */ 670int 671bufferevent_base_set(struct event_base *base, struct bufferevent *bufev) 672{ 673 int res = -1; 674 675 BEV_LOCK(bufev); 676 if (!BEV_IS_SOCKET(bufev)) 677 goto done; 678 679 bufev->ev_base = base; 680 681 res = event_base_set(base, &bufev->ev_read); 682 if (res == -1) 683 goto done; 684 685 res = event_base_set(base, &bufev->ev_write); 686done: 687 BEV_UNLOCK(bufev); 688 return res; 689} 690 691static int 692be_socket_ctrl(struct bufferevent *bev, enum bufferevent_ctrl_op op, 693 union bufferevent_ctrl_data *data) 694{ 695 switch (op) { 696 case BEV_CTRL_SET_FD: 697 be_socket_setfd(bev, data->fd); 698 return 0; 699 case BEV_CTRL_GET_FD: 700 data->fd = event_get_fd(&bev->ev_read); 701 return 0; 702 case BEV_CTRL_GET_UNDERLYING: 703 case BEV_CTRL_CANCEL_ALL: 704 default: 705 return -1; 706 } 707} 708