winsock_event.c revision 356345
1/* 2 * util/winsock_event.c - implementation of the unbound winsock event handler. 3 * 4 * Copyright (c) 2008, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35/** 36 * \file 37 * Implementation of the unbound WinSock2 API event notification handler 38 * for the Windows port. 39 */ 40 41#include "config.h" 42#ifdef USE_WINSOCK 43#include <signal.h> 44#ifdef HAVE_TIME_H 45#include <time.h> 46#endif 47#include <sys/time.h> 48#include "util/winsock_event.h" 49#include "util/fptr_wlist.h" 50 51int mini_ev_cmp(const void* a, const void* b) 52{ 53 const struct event *e = (const struct event*)a; 54 const struct event *f = (const struct event*)b; 55 if(e->ev_timeout.tv_sec < f->ev_timeout.tv_sec) 56 return -1; 57 if(e->ev_timeout.tv_sec > f->ev_timeout.tv_sec) 58 return 1; 59 if(e->ev_timeout.tv_usec < f->ev_timeout.tv_usec) 60 return -1; 61 if(e->ev_timeout.tv_usec > f->ev_timeout.tv_usec) 62 return 1; 63 if(e < f) 64 return -1; 65 if(e > f) 66 return 1; 67 return 0; 68} 69 70/** set time */ 71static int 72settime(struct event_base* base) 73{ 74 if(gettimeofday(base->time_tv, NULL) < 0) { 75 return -1; 76 } 77#ifndef S_SPLINT_S 78 *base->time_secs = (time_t)base->time_tv->tv_sec; 79#endif 80 return 0; 81} 82 83#ifdef UNBOUND_DEBUG 84/** 85 * Find a fd in the list of items. 86 * Note that not all items have a fd associated (those are -1). 87 * Signals are stored separately, and not searched. 88 * @param base: event base to look in. 89 * @param fd: what socket to look for. 90 * @return the index in the array, or -1 on failure. 91 */ 92static int 93find_fd(struct event_base* base, int fd) 94{ 95 int i; 96 for(i=0; i<base->max; i++) { 97 if(base->items[i]->ev_fd == fd) 98 return i; 99 } 100 return -1; 101} 102#endif 103 104/** Find ptr in base array */ 105static void 106zero_waitfor(WSAEVENT waitfor[], WSAEVENT x) 107{ 108 int i; 109 for(i=0; i<WSK_MAX_ITEMS; i++) { 110 if(waitfor[i] == x) 111 waitfor[i] = 0; 112 } 113} 114 115void *event_init(time_t* time_secs, struct timeval* time_tv) 116{ 117 struct event_base* base = (struct event_base*)malloc( 118 sizeof(struct event_base)); 119 if(!base) 120 return NULL; 121 memset(base, 0, sizeof(*base)); 122 base->time_secs = time_secs; 123 base->time_tv = time_tv; 124 if(settime(base) < 0) { 125 event_base_free(base); 126 return NULL; 127 } 128 base->items = (struct event**)calloc(WSK_MAX_ITEMS, 129 sizeof(struct event*)); 130 if(!base->items) { 131 event_base_free(base); 132 return NULL; 133 } 134 base->cap = WSK_MAX_ITEMS; 135 base->max = 0; 136 base->times = rbtree_create(mini_ev_cmp); 137 if(!base->times) { 138 event_base_free(base); 139 return NULL; 140 } 141 base->signals = (struct event**)calloc(MAX_SIG, sizeof(struct event*)); 142 if(!base->signals) { 143 event_base_free(base); 144 return NULL; 145 } 146 base->tcp_stickies = 0; 147 base->tcp_reinvigorated = 0; 148 verbose(VERB_CLIENT, "winsock_event inited"); 149 return base; 150} 151 152const char *event_get_version(void) 153{ 154 return "winsock-event-"PACKAGE_VERSION; 155} 156 157const char *event_get_method(void) 158{ 159 return "WSAWaitForMultipleEvents"; 160} 161 162/** call timeouts handlers, and return how long to wait for next one or -1 */ 163static void handle_timeouts(struct event_base* base, struct timeval* now, 164 struct timeval* wait) 165{ 166 struct event* p; 167#ifndef S_SPLINT_S 168 wait->tv_sec = (time_t)-1; 169#endif 170 verbose(VERB_CLIENT, "winsock_event handle_timeouts"); 171 172 while((rbnode_type*)(p = (struct event*)rbtree_first(base->times)) 173 !=RBTREE_NULL) { 174#ifndef S_SPLINT_S 175 if(p->ev_timeout.tv_sec > now->tv_sec || 176 (p->ev_timeout.tv_sec==now->tv_sec && 177 p->ev_timeout.tv_usec > now->tv_usec)) { 178 /* there is a next larger timeout. wait for it */ 179 wait->tv_sec = p->ev_timeout.tv_sec - now->tv_sec; 180 if(now->tv_usec > p->ev_timeout.tv_usec) { 181 wait->tv_sec--; 182 wait->tv_usec = 1000000 - (now->tv_usec - 183 p->ev_timeout.tv_usec); 184 } else { 185 wait->tv_usec = p->ev_timeout.tv_usec 186 - now->tv_usec; 187 } 188 verbose(VERB_CLIENT, "winsock_event wait=" ARG_LL "d.%6.6d", 189 (long long)wait->tv_sec, (int)wait->tv_usec); 190 return; 191 } 192#endif 193 /* event times out, remove it */ 194 (void)rbtree_delete(base->times, p); 195 p->ev_events &= ~EV_TIMEOUT; 196 fptr_ok(fptr_whitelist_event(p->ev_callback)); 197 (*p->ev_callback)(p->ev_fd, EV_TIMEOUT, p->ev_arg); 198 } 199 verbose(VERB_CLIENT, "winsock_event wait=(-1)"); 200} 201 202/** handle is_signal events and see if signalled */ 203static void handle_signal(struct event* ev) 204{ 205 DWORD ret; 206 log_assert(ev->is_signal && ev->hEvent); 207 /* see if the event is signalled */ 208 ret = WSAWaitForMultipleEvents(1, &ev->hEvent, 0 /* any object */, 209 0 /* return immediately */, 0 /* not alertable for IOcomple*/); 210 if(ret == WSA_WAIT_IO_COMPLETION || ret == WSA_WAIT_FAILED) { 211 log_err("WSAWaitForMultipleEvents(signal) failed: %s", 212 wsa_strerror(WSAGetLastError())); 213 return; 214 } 215 if(ret == WSA_WAIT_TIMEOUT) { 216 /* not signalled */ 217 return; 218 } 219 220 /* reset the signal */ 221 if(!WSAResetEvent(ev->hEvent)) 222 log_err("WSAResetEvent failed: %s", 223 wsa_strerror(WSAGetLastError())); 224 /* do the callback (which may set the signal again) */ 225 fptr_ok(fptr_whitelist_event(ev->ev_callback)); 226 (*ev->ev_callback)(ev->ev_fd, ev->ev_events, ev->ev_arg); 227} 228 229/** call select and callbacks for that */ 230static int handle_select(struct event_base* base, struct timeval* wait) 231{ 232 DWORD timeout = 0; /* in milliseconds */ 233 DWORD ret; 234 struct event* eventlist[WSK_MAX_ITEMS]; 235 WSANETWORKEVENTS netev; 236 int i, numwait = 0, startidx = 0, was_timeout = 0; 237 int newstickies = 0; 238 struct timeval nultm; 239 240 verbose(VERB_CLIENT, "winsock_event handle_select"); 241 242#ifndef S_SPLINT_S 243 if(wait->tv_sec==(time_t)-1) 244 wait = NULL; 245 if(wait) 246 timeout = wait->tv_sec*1000 + wait->tv_usec/1000; 247 if(base->tcp_stickies) { 248 wait = &nultm; 249 nultm.tv_sec = 0; 250 nultm.tv_usec = 0; 251 timeout = 0; /* no waiting, we have sticky events */ 252 } 253#endif 254 255 /* prepare event array */ 256 for(i=0; i<base->max; i++) { 257 if(base->items[i]->ev_fd == -1 && !base->items[i]->is_signal) 258 continue; /* skip timer only events */ 259 eventlist[numwait] = base->items[i]; 260 base->waitfor[numwait++] = base->items[i]->hEvent; 261 if(numwait == WSK_MAX_ITEMS) 262 break; /* sanity check */ 263 } 264 log_assert(numwait <= WSA_MAXIMUM_WAIT_EVENTS); 265 verbose(VERB_CLIENT, "winsock_event bmax=%d numwait=%d wait=%s " 266 "timeout=%d", base->max, numwait, (wait?"<wait>":"<null>"), 267 (int)timeout); 268 269 /* do the wait */ 270 if(numwait == 0) { 271 /* WSAWaitFor.. doesn't like 0 event objects */ 272 if(wait) { 273 Sleep(timeout); 274 } 275 was_timeout = 1; 276 } else { 277 ret = WSAWaitForMultipleEvents(numwait, base->waitfor, 278 0 /* do not wait for all, just one will do */, 279 wait?timeout:WSA_INFINITE, 280 0); /* we are not alertable (IO completion events) */ 281 if(ret == WSA_WAIT_IO_COMPLETION) { 282 log_err("WSAWaitForMultipleEvents failed: WSA_WAIT_IO_COMPLETION"); 283 return -1; 284 } else if(ret == WSA_WAIT_FAILED) { 285 log_err("WSAWaitForMultipleEvents failed: %s", 286 wsa_strerror(WSAGetLastError())); 287 return -1; 288 } else if(ret == WSA_WAIT_TIMEOUT) { 289 was_timeout = 1; 290 } else 291 startidx = ret - WSA_WAIT_EVENT_0; 292 } 293 verbose(VERB_CLIENT, "winsock_event wake was_timeout=%d startidx=%d", 294 was_timeout, startidx); 295 296 /* get new time after wait */ 297 if(settime(base) < 0) 298 return -1; 299 300 /* callbacks */ 301 if(base->tcp_stickies) 302 startidx = 0; /* process all events, some are sticky */ 303 for(i=startidx; i<numwait; i++) 304 eventlist[i]->just_checked = 1; 305 306 verbose(VERB_CLIENT, "winsock_event signals"); 307 for(i=startidx; i<numwait; i++) { 308 if(!base->waitfor[i]) 309 continue; /* was deleted */ 310 if(eventlist[i]->is_signal) { 311 eventlist[i]->just_checked = 0; 312 handle_signal(eventlist[i]); 313 } 314 } 315 /* early exit - do not process network, exit quickly */ 316 if(base->need_to_exit) 317 return 0; 318 319 verbose(VERB_CLIENT, "winsock_event net"); 320 for(i=startidx; i<numwait; i++) { 321 short bits = 0; 322 /* eventlist[i] fired */ 323 /* see if eventlist[i] is still valid and just checked from 324 * WSAWaitForEvents */ 325 if(!base->waitfor[i]) 326 continue; /* was deleted */ 327 if(!eventlist[i]->just_checked) 328 continue; /* added by other callback */ 329 if(eventlist[i]->is_signal) 330 continue; /* not a network event at all */ 331 eventlist[i]->just_checked = 0; 332 333 if(WSAEnumNetworkEvents(eventlist[i]->ev_fd, 334 base->waitfor[i], /* reset the event handle */ 335 /*NULL,*/ /* do not reset the event handle */ 336 &netev) != 0) { 337 log_err("WSAEnumNetworkEvents failed: %s", 338 wsa_strerror(WSAGetLastError())); 339 return -1; 340 } 341 if((netev.lNetworkEvents & FD_READ)) { 342 if(netev.iErrorCode[FD_READ_BIT] != 0) 343 verbose(VERB_ALGO, "FD_READ_BIT error: %s", 344 wsa_strerror(netev.iErrorCode[FD_READ_BIT])); 345 bits |= EV_READ; 346 } 347 if((netev.lNetworkEvents & FD_WRITE)) { 348 if(netev.iErrorCode[FD_WRITE_BIT] != 0) 349 verbose(VERB_ALGO, "FD_WRITE_BIT error: %s", 350 wsa_strerror(netev.iErrorCode[FD_WRITE_BIT])); 351 bits |= EV_WRITE; 352 } 353 if((netev.lNetworkEvents & FD_CONNECT)) { 354 if(netev.iErrorCode[FD_CONNECT_BIT] != 0) 355 verbose(VERB_ALGO, "FD_CONNECT_BIT error: %s", 356 wsa_strerror(netev.iErrorCode[FD_CONNECT_BIT])); 357 bits |= EV_READ; 358 bits |= EV_WRITE; 359 } 360 if((netev.lNetworkEvents & FD_ACCEPT)) { 361 if(netev.iErrorCode[FD_ACCEPT_BIT] != 0) 362 verbose(VERB_ALGO, "FD_ACCEPT_BIT error: %s", 363 wsa_strerror(netev.iErrorCode[FD_ACCEPT_BIT])); 364 bits |= EV_READ; 365 } 366 if((netev.lNetworkEvents & FD_CLOSE)) { 367 if(netev.iErrorCode[FD_CLOSE_BIT] != 0) 368 verbose(VERB_ALGO, "FD_CLOSE_BIT error: %s", 369 wsa_strerror(netev.iErrorCode[FD_CLOSE_BIT])); 370 bits |= EV_READ; 371 bits |= EV_WRITE; 372 } 373 if(eventlist[i]->is_tcp && eventlist[i]->stick_events) { 374 verbose(VERB_ALGO, "winsock %d pass sticky %s%s", 375 eventlist[i]->ev_fd, 376 (eventlist[i]->old_events&EV_READ)?"EV_READ":"", 377 (eventlist[i]->old_events&EV_WRITE)?"EV_WRITE":""); 378 bits |= eventlist[i]->old_events; 379 } 380 if(eventlist[i]->is_tcp && bits) { 381 eventlist[i]->old_events = bits; 382 eventlist[i]->stick_events = 1; 383 if((eventlist[i]->ev_events & bits)) { 384 newstickies = 1; 385 } 386 verbose(VERB_ALGO, "winsock %d store sticky %s%s", 387 eventlist[i]->ev_fd, 388 (eventlist[i]->old_events&EV_READ)?"EV_READ":"", 389 (eventlist[i]->old_events&EV_WRITE)?"EV_WRITE":""); 390 } 391 if((bits & eventlist[i]->ev_events)) { 392 verbose(VERB_ALGO, "winsock event callback %p fd=%d " 393 "%s%s%s%s%s ; %s%s%s", 394 eventlist[i], eventlist[i]->ev_fd, 395 (netev.lNetworkEvents&FD_READ)?" FD_READ":"", 396 (netev.lNetworkEvents&FD_WRITE)?" FD_WRITE":"", 397 (netev.lNetworkEvents&FD_CONNECT)? 398 " FD_CONNECT":"", 399 (netev.lNetworkEvents&FD_ACCEPT)? 400 " FD_ACCEPT":"", 401 (netev.lNetworkEvents&FD_CLOSE)?" FD_CLOSE":"", 402 (bits&EV_READ)?" EV_READ":"", 403 (bits&EV_WRITE)?" EV_WRITE":"", 404 (bits&EV_TIMEOUT)?" EV_TIMEOUT":""); 405 406 fptr_ok(fptr_whitelist_event( 407 eventlist[i]->ev_callback)); 408 (*eventlist[i]->ev_callback)(eventlist[i]->ev_fd, 409 bits & eventlist[i]->ev_events, 410 eventlist[i]->ev_arg); 411 } 412 if(eventlist[i]->is_tcp && bits) 413 verbose(VERB_ALGO, "winsock %d got sticky %s%s", 414 eventlist[i]->ev_fd, 415 (eventlist[i]->old_events&EV_READ)?"EV_READ":"", 416 (eventlist[i]->old_events&EV_WRITE)?"EV_WRITE":""); 417 } 418 verbose(VERB_CLIENT, "winsock_event net"); 419 if(base->tcp_reinvigorated) { 420 verbose(VERB_CLIENT, "winsock_event reinvigorated"); 421 base->tcp_reinvigorated = 0; 422 newstickies = 1; 423 } 424 base->tcp_stickies = newstickies; 425 verbose(VERB_CLIENT, "winsock_event handle_select end"); 426 return 0; 427} 428 429int event_base_dispatch(struct event_base *base) 430{ 431 struct timeval wait; 432 if(settime(base) < 0) 433 return -1; 434 while(!base->need_to_exit) 435 { 436 /* see if timeouts need handling */ 437 handle_timeouts(base, base->time_tv, &wait); 438 if(base->need_to_exit) 439 return 0; 440 /* do select */ 441 if(handle_select(base, &wait) < 0) { 442 if(base->need_to_exit) 443 return 0; 444 return -1; 445 } 446 } 447 return 0; 448} 449 450int event_base_loopexit(struct event_base *base, 451 struct timeval * ATTR_UNUSED(tv)) 452{ 453 verbose(VERB_CLIENT, "winsock_event loopexit"); 454 base->need_to_exit = 1; 455 return 0; 456} 457 458void event_base_free(struct event_base *base) 459{ 460 verbose(VERB_CLIENT, "winsock_event event_base_free"); 461 if(!base) 462 return; 463 free(base->items); 464 free(base->times); 465 free(base->signals); 466 free(base); 467} 468 469void event_set(struct event *ev, int fd, short bits, 470 void (*cb)(int, short, void *), void *arg) 471{ 472 ev->node.key = ev; 473 ev->ev_fd = fd; 474 ev->ev_events = bits; 475 ev->ev_callback = cb; 476 fptr_ok(fptr_whitelist_event(ev->ev_callback)); 477 ev->ev_arg = arg; 478 ev->just_checked = 0; 479 ev->added = 0; 480} 481 482int event_base_set(struct event_base *base, struct event *ev) 483{ 484 ev->ev_base = base; 485 ev->old_events = 0; 486 ev->stick_events = 0; 487 ev->added = 0; 488 return 0; 489} 490 491int event_add(struct event *ev, struct timeval *tv) 492{ 493 verbose(VERB_ALGO, "event_add %p added=%d fd=%d tv=" ARG_LL "d %s%s%s", 494 ev, ev->added, ev->ev_fd, 495 (tv?(long long)tv->tv_sec*1000+(long long)tv->tv_usec/1000:-1), 496 (ev->ev_events&EV_READ)?" EV_READ":"", 497 (ev->ev_events&EV_WRITE)?" EV_WRITE":"", 498 (ev->ev_events&EV_TIMEOUT)?" EV_TIMEOUT":""); 499 if(ev->added) 500 event_del(ev); 501 log_assert(ev->ev_fd==-1 || find_fd(ev->ev_base, ev->ev_fd) == -1); 502 ev->is_tcp = 0; 503 ev->is_signal = 0; 504 ev->just_checked = 0; 505 506 if((ev->ev_events&(EV_READ|EV_WRITE)) && ev->ev_fd != -1) { 507 BOOL b=0; 508 int t, l; 509 long events = 0; 510 511 if(ev->ev_base->max == ev->ev_base->cap) 512 return -1; 513 ev->idx = ev->ev_base->max++; 514 ev->ev_base->items[ev->idx] = ev; 515 516 if( (ev->ev_events&EV_READ) ) 517 events |= FD_READ; 518 if( (ev->ev_events&EV_WRITE) ) 519 events |= FD_WRITE; 520 l = sizeof(t); 521 if(getsockopt(ev->ev_fd, SOL_SOCKET, SO_TYPE, 522 (void*)&t, &l) != 0) 523 log_err("getsockopt(SO_TYPE) failed: %s", 524 wsa_strerror(WSAGetLastError())); 525 if(t == SOCK_STREAM) { 526 /* TCP socket */ 527 ev->is_tcp = 1; 528 events |= FD_CLOSE; 529 if( (ev->ev_events&EV_WRITE) ) 530 events |= FD_CONNECT; 531 l = sizeof(b); 532 if(getsockopt(ev->ev_fd, SOL_SOCKET, SO_ACCEPTCONN, 533 (void*)&b, &l) != 0) 534 log_err("getsockopt(SO_ACCEPTCONN) failed: %s", 535 wsa_strerror(WSAGetLastError())); 536 if(b) /* TCP accept socket */ 537 events |= FD_ACCEPT; 538 } 539 ev->hEvent = WSACreateEvent(); 540 if(ev->hEvent == WSA_INVALID_EVENT) 541 log_err("WSACreateEvent failed: %s", 542 wsa_strerror(WSAGetLastError())); 543 /* automatically sets fd to nonblocking mode. 544 * nonblocking cannot be disabled, until wsaES(fd, NULL, 0) */ 545 if(WSAEventSelect(ev->ev_fd, ev->hEvent, events) != 0) { 546 log_err("WSAEventSelect failed: %s", 547 wsa_strerror(WSAGetLastError())); 548 } 549 if(ev->is_tcp && ev->stick_events && 550 (ev->ev_events & ev->old_events)) { 551 /* go to processing the sticky event right away */ 552 ev->ev_base->tcp_reinvigorated = 1; 553 } 554 } 555 556 if(tv && (ev->ev_events&EV_TIMEOUT)) { 557#ifndef S_SPLINT_S 558 struct timeval *now = ev->ev_base->time_tv; 559 ev->ev_timeout.tv_sec = tv->tv_sec + now->tv_sec; 560 ev->ev_timeout.tv_usec = tv->tv_usec + now->tv_usec; 561 while(ev->ev_timeout.tv_usec >= 1000000) { 562 ev->ev_timeout.tv_usec -= 1000000; 563 ev->ev_timeout.tv_sec++; 564 } 565#endif 566 (void)rbtree_insert(ev->ev_base->times, &ev->node); 567 } 568 ev->added = 1; 569 return 0; 570} 571 572int event_del(struct event *ev) 573{ 574 verbose(VERB_ALGO, "event_del %p added=%d fd=%d tv=" ARG_LL "d %s%s%s", 575 ev, ev->added, ev->ev_fd, 576 (ev->ev_events&EV_TIMEOUT)?(long long)ev->ev_timeout.tv_sec*1000+ 577 (long long)ev->ev_timeout.tv_usec/1000:-1, 578 (ev->ev_events&EV_READ)?" EV_READ":"", 579 (ev->ev_events&EV_WRITE)?" EV_WRITE":"", 580 (ev->ev_events&EV_TIMEOUT)?" EV_TIMEOUT":""); 581 if(!ev->added) 582 return 0; 583 log_assert(ev->added); 584 if((ev->ev_events&EV_TIMEOUT)) 585 (void)rbtree_delete(ev->ev_base->times, &ev->node); 586 if((ev->ev_events&(EV_READ|EV_WRITE)) && ev->ev_fd != -1) { 587 log_assert(ev->ev_base->max > 0); 588 /* remove item and compact the list */ 589 ev->ev_base->items[ev->idx] = 590 ev->ev_base->items[ev->ev_base->max-1]; 591 ev->ev_base->items[ev->ev_base->max-1] = NULL; 592 ev->ev_base->max--; 593 if(ev->idx < ev->ev_base->max) 594 ev->ev_base->items[ev->idx]->idx = ev->idx; 595 zero_waitfor(ev->ev_base->waitfor, ev->hEvent); 596 597 if(WSAEventSelect(ev->ev_fd, ev->hEvent, 0) != 0) 598 log_err("WSAEventSelect(disable) failed: %s", 599 wsa_strerror(WSAGetLastError())); 600 if(!WSACloseEvent(ev->hEvent)) 601 log_err("WSACloseEvent failed: %s", 602 wsa_strerror(WSAGetLastError())); 603 } 604 ev->just_checked = 0; 605 ev->added = 0; 606 return 0; 607} 608 609/** which base gets to handle signals */ 610static struct event_base* signal_base = NULL; 611/** signal handler */ 612static RETSIGTYPE sigh(int sig) 613{ 614 struct event* ev; 615 if(!signal_base || sig < 0 || sig >= MAX_SIG) 616 return; 617 ev = signal_base->signals[sig]; 618 if(!ev) 619 return; 620 fptr_ok(fptr_whitelist_event(ev->ev_callback)); 621 (*ev->ev_callback)(sig, EV_SIGNAL, ev->ev_arg); 622} 623 624int signal_add(struct event *ev, struct timeval * ATTR_UNUSED(tv)) 625{ 626 if(ev->ev_fd == -1 || ev->ev_fd >= MAX_SIG) 627 return -1; 628 signal_base = ev->ev_base; 629 ev->ev_base->signals[ev->ev_fd] = ev; 630 ev->added = 1; 631 if(signal(ev->ev_fd, sigh) == SIG_ERR) { 632 return -1; 633 } 634 return 0; 635} 636 637int signal_del(struct event *ev) 638{ 639 if(ev->ev_fd == -1 || ev->ev_fd >= MAX_SIG) 640 return -1; 641 ev->ev_base->signals[ev->ev_fd] = NULL; 642 ev->added = 0; 643 return 0; 644} 645 646void winsock_tcp_wouldblock(struct event* ev, int eventbits) 647{ 648 verbose(VERB_ALGO, "winsock: tcp wouldblock %s", 649 eventbits==EV_READ?"EV_READ":"EV_WRITE"); 650 ev->old_events &= (~eventbits); 651 if(ev->old_events == 0) 652 ev->stick_events = 0; 653 /* in case this is the last sticky event, we could 654 * possibly run an empty handler loop to reset the base 655 * tcp_stickies variable 656 */ 657} 658 659int winsock_register_wsaevent(struct event_base* base, struct event* ev, 660 WSAEVENT wsaevent, void (*cb)(int, short, void*), void* arg) 661{ 662 if(base->max == base->cap) 663 return 0; 664 memset(ev, 0, sizeof(*ev)); 665 ev->ev_fd = -1; 666 ev->ev_events = EV_READ; 667 ev->ev_callback = cb; 668 ev->ev_arg = arg; 669 ev->is_signal = 1; 670 ev->hEvent = wsaevent; 671 ev->added = 1; 672 ev->ev_base = base; 673 ev->idx = ev->ev_base->max++; 674 ev->ev_base->items[ev->idx] = ev; 675 return 1; 676} 677 678void winsock_unregister_wsaevent(struct event* ev) 679{ 680 if(!ev || !ev->added) return; 681 log_assert(ev->added && ev->ev_base->max > 0) 682 /* remove item and compact the list */ 683 ev->ev_base->items[ev->idx] = ev->ev_base->items[ev->ev_base->max-1]; 684 ev->ev_base->items[ev->ev_base->max-1] = NULL; 685 ev->ev_base->max--; 686 if(ev->idx < ev->ev_base->max) 687 ev->ev_base->items[ev->idx]->idx = ev->idx; 688 ev->added = 0; 689} 690 691#else /* USE_WINSOCK */ 692/** symbol so this codefile defines symbols. pleasing ranlib on OSX 10.5 */ 693int winsock_unused_symbol = 1; 694#endif /* USE_WINSOCK */ 695