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comparison src/event/ngx_event_accept.c @ 7285:88a624c9b491

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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
author Roman Arutyunyan <arut@nginx.com>
date Fri, 01 Jun 2018 16:55:49 +0300
parents 52aacc8ddcc5
children fdc3d40979b0
comparison
equal deleted inserted replaced
7284:52aacc8ddcc5 7285:88a624c9b491
8 #include <ngx_config.h> 8 #include <ngx_config.h>
9 #include <ngx_core.h> 9 #include <ngx_core.h>
10 #include <ngx_event.h> 10 #include <ngx_event.h>
11 11
12 12
13 static ngx_int_t ngx_enable_accept_events(ngx_cycle_t *cycle);
14 static ngx_int_t ngx_disable_accept_events(ngx_cycle_t *cycle, ngx_uint_t all); 13 static ngx_int_t ngx_disable_accept_events(ngx_cycle_t *cycle, ngx_uint_t all);
15 static void ngx_close_accepted_connection(ngx_connection_t *c); 14 static void ngx_close_accepted_connection(ngx_connection_t *c);
16 #if (NGX_DEBUG)
17 static void ngx_debug_accepted_connection(ngx_event_conf_t *ecf,
18 ngx_connection_t *c);
19 #endif
20 15
21 16
22 void 17 void
23 ngx_event_accept(ngx_event_t *ev) 18 ngx_event_accept(ngx_event_t *ev)
24 { 19 {
318 313
319 } while (ev->available); 314 } while (ev->available);
320 } 315 }
321 316
322 317
323 #if !(NGX_WIN32)
324
325 void
326 ngx_event_recvmsg(ngx_event_t *ev)
327 {
328 ssize_t n;
329 ngx_log_t *log;
330 ngx_err_t err;
331 socklen_t socklen, local_socklen;
332 ngx_event_t *rev, *wev;
333 struct iovec iov[1];
334 struct msghdr msg;
335 ngx_sockaddr_t sa, lsa;
336 struct sockaddr *sockaddr, *local_sockaddr;
337 ngx_listening_t *ls;
338 ngx_event_conf_t *ecf;
339 ngx_connection_t *c, *lc;
340 static u_char buffer[65535];
341
342 #if (NGX_HAVE_MSGHDR_MSG_CONTROL)
343
344 #if (NGX_HAVE_IP_RECVDSTADDR)
345 u_char msg_control[CMSG_SPACE(sizeof(struct in_addr))];
346 #elif (NGX_HAVE_IP_PKTINFO)
347 u_char msg_control[CMSG_SPACE(sizeof(struct in_pktinfo))];
348 #endif
349
350 #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO)
351 u_char msg_control6[CMSG_SPACE(sizeof(struct in6_pktinfo))];
352 #endif
353
354 #endif
355
356 if (ev->timedout) {
357 if (ngx_enable_accept_events((ngx_cycle_t *) ngx_cycle) != NGX_OK) {
358 return;
359 }
360
361 ev->timedout = 0;
362 }
363
364 ecf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_event_core_module);
365
366 if (!(ngx_event_flags & NGX_USE_KQUEUE_EVENT)) {
367 ev->available = ecf->multi_accept;
368 }
369
370 lc = ev->data;
371 ls = lc->listening;
372 ev->ready = 0;
373
374 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
375 "recvmsg on %V, ready: %d", &ls->addr_text, ev->available);
376
377 do {
378 ngx_memzero(&msg, sizeof(struct msghdr));
379
380 iov[0].iov_base = (void *) buffer;
381 iov[0].iov_len = sizeof(buffer);
382
383 msg.msg_name = &sa;
384 msg.msg_namelen = sizeof(ngx_sockaddr_t);
385 msg.msg_iov = iov;
386 msg.msg_iovlen = 1;
387
388 #if (NGX_HAVE_MSGHDR_MSG_CONTROL)
389
390 if (ls->wildcard) {
391
392 #if (NGX_HAVE_IP_RECVDSTADDR || NGX_HAVE_IP_PKTINFO)
393 if (ls->sockaddr->sa_family == AF_INET) {
394 msg.msg_control = &msg_control;
395 msg.msg_controllen = sizeof(msg_control);
396 }
397 #endif
398
399 #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO)
400 if (ls->sockaddr->sa_family == AF_INET6) {
401 msg.msg_control = &msg_control6;
402 msg.msg_controllen = sizeof(msg_control6);
403 }
404 #endif
405 }
406
407 #endif
408
409 n = recvmsg(lc->fd, &msg, 0);
410
411 if (n == -1) {
412 err = ngx_socket_errno;
413
414 if (err == NGX_EAGAIN) {
415 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, err,
416 "recvmsg() not ready");
417 return;
418 }
419
420 ngx_log_error(NGX_LOG_ALERT, ev->log, err, "recvmsg() failed");
421
422 return;
423 }
424
425 #if (NGX_HAVE_MSGHDR_MSG_CONTROL)
426 if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) {
427 ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
428 "recvmsg() truncated data");
429 continue;
430 }
431 #endif
432
433 sockaddr = msg.msg_name;
434 socklen = msg.msg_namelen;
435
436 if (socklen > (socklen_t) sizeof(ngx_sockaddr_t)) {
437 socklen = sizeof(ngx_sockaddr_t);
438 }
439
440 if (socklen == 0) {
441
442 /*
443 * on Linux recvmsg() returns zero msg_namelen
444 * when receiving packets from unbound AF_UNIX sockets
445 */
446
447 socklen = sizeof(struct sockaddr);
448 ngx_memzero(&sa, sizeof(struct sockaddr));
449 sa.sockaddr.sa_family = ls->sockaddr->sa_family;
450 }
451
452 local_sockaddr = ls->sockaddr;
453 local_socklen = ls->socklen;
454
455 #if (NGX_HAVE_MSGHDR_MSG_CONTROL)
456
457 if (ls->wildcard) {
458 struct cmsghdr *cmsg;
459
460 ngx_memcpy(&lsa, local_sockaddr, local_socklen);
461 local_sockaddr = &lsa.sockaddr;
462
463 for (cmsg = CMSG_FIRSTHDR(&msg);
464 cmsg != NULL;
465 cmsg = CMSG_NXTHDR(&msg, cmsg))
466 {
467
468 #if (NGX_HAVE_IP_RECVDSTADDR)
469
470 if (cmsg->cmsg_level == IPPROTO_IP
471 && cmsg->cmsg_type == IP_RECVDSTADDR
472 && local_sockaddr->sa_family == AF_INET)
473 {
474 struct in_addr *addr;
475 struct sockaddr_in *sin;
476
477 addr = (struct in_addr *) CMSG_DATA(cmsg);
478 sin = (struct sockaddr_in *) local_sockaddr;
479 sin->sin_addr = *addr;
480
481 break;
482 }
483
484 #elif (NGX_HAVE_IP_PKTINFO)
485
486 if (cmsg->cmsg_level == IPPROTO_IP
487 && cmsg->cmsg_type == IP_PKTINFO
488 && local_sockaddr->sa_family == AF_INET)
489 {
490 struct in_pktinfo *pkt;
491 struct sockaddr_in *sin;
492
493 pkt = (struct in_pktinfo *) CMSG_DATA(cmsg);
494 sin = (struct sockaddr_in *) local_sockaddr;
495 sin->sin_addr = pkt->ipi_addr;
496
497 break;
498 }
499
500 #endif
501
502 #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO)
503
504 if (cmsg->cmsg_level == IPPROTO_IPV6
505 && cmsg->cmsg_type == IPV6_PKTINFO
506 && local_sockaddr->sa_family == AF_INET6)
507 {
508 struct in6_pktinfo *pkt6;
509 struct sockaddr_in6 *sin6;
510
511 pkt6 = (struct in6_pktinfo *) CMSG_DATA(cmsg);
512 sin6 = (struct sockaddr_in6 *) local_sockaddr;
513 sin6->sin6_addr = pkt6->ipi6_addr;
514
515 break;
516 }
517
518 #endif
519
520 }
521 }
522
523 #endif
524
525 #if (NGX_STAT_STUB)
526 (void) ngx_atomic_fetch_add(ngx_stat_accepted, 1);
527 #endif
528
529 ngx_accept_disabled = ngx_cycle->connection_n / 8
530 - ngx_cycle->free_connection_n;
531
532 c = ngx_get_connection(lc->fd, ev->log);
533 if (c == NULL) {
534 return;
535 }
536
537 c->shared = 1;
538 c->type = SOCK_DGRAM;
539 c->socklen = socklen;
540
541 #if (NGX_STAT_STUB)
542 (void) ngx_atomic_fetch_add(ngx_stat_active, 1);
543 #endif
544
545 c->pool = ngx_create_pool(ls->pool_size, ev->log);
546 if (c->pool == NULL) {
547 ngx_close_accepted_connection(c);
548 return;
549 }
550
551 c->sockaddr = ngx_palloc(c->pool, socklen);
552 if (c->sockaddr == NULL) {
553 ngx_close_accepted_connection(c);
554 return;
555 }
556
557 ngx_memcpy(c->sockaddr, sockaddr, socklen);
558
559 log = ngx_palloc(c->pool, sizeof(ngx_log_t));
560 if (log == NULL) {
561 ngx_close_accepted_connection(c);
562 return;
563 }
564
565 *log = ls->log;
566
567 c->send = ngx_udp_send;
568 c->send_chain = ngx_udp_send_chain;
569
570 c->log = log;
571 c->pool->log = log;
572 c->listening = ls;
573
574 if (local_sockaddr == &lsa.sockaddr) {
575 local_sockaddr = ngx_palloc(c->pool, local_socklen);
576 if (local_sockaddr == NULL) {
577 ngx_close_accepted_connection(c);
578 return;
579 }
580
581 ngx_memcpy(local_sockaddr, &lsa, local_socklen);
582 }
583
584 c->local_sockaddr = local_sockaddr;
585 c->local_socklen = local_socklen;
586
587 c->buffer = ngx_create_temp_buf(c->pool, n);
588 if (c->buffer == NULL) {
589 ngx_close_accepted_connection(c);
590 return;
591 }
592
593 c->buffer->last = ngx_cpymem(c->buffer->last, buffer, n);
594
595 rev = c->read;
596 wev = c->write;
597
598 wev->ready = 1;
599
600 rev->log = log;
601 wev->log = log;
602
603 /*
604 * TODO: MT: - ngx_atomic_fetch_add()
605 * or protection by critical section or light mutex
606 *
607 * TODO: MP: - allocated in a shared memory
608 * - ngx_atomic_fetch_add()
609 * or protection by critical section or light mutex
610 */
611
612 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
613
614 #if (NGX_STAT_STUB)
615 (void) ngx_atomic_fetch_add(ngx_stat_handled, 1);
616 #endif
617
618 if (ls->addr_ntop) {
619 c->addr_text.data = ngx_pnalloc(c->pool, ls->addr_text_max_len);
620 if (c->addr_text.data == NULL) {
621 ngx_close_accepted_connection(c);
622 return;
623 }
624
625 c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen,
626 c->addr_text.data,
627 ls->addr_text_max_len, 0);
628 if (c->addr_text.len == 0) {
629 ngx_close_accepted_connection(c);
630 return;
631 }
632 }
633
634 #if (NGX_DEBUG)
635 {
636 ngx_str_t addr;
637 u_char text[NGX_SOCKADDR_STRLEN];
638
639 ngx_debug_accepted_connection(ecf, c);
640
641 if (log->log_level & NGX_LOG_DEBUG_EVENT) {
642 addr.data = text;
643 addr.len = ngx_sock_ntop(c->sockaddr, c->socklen, text,
644 NGX_SOCKADDR_STRLEN, 1);
645
646 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, log, 0,
647 "*%uA recvmsg: %V fd:%d n:%z",
648 c->number, &addr, c->fd, n);
649 }
650
651 }
652 #endif
653
654 log->data = NULL;
655 log->handler = NULL;
656
657 ls->handler(c);
658
659 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
660 ev->available -= n;
661 }
662
663 } while (ev->available);
664 }
665
666 #endif
667
668
669 ngx_int_t 318 ngx_int_t
670 ngx_trylock_accept_mutex(ngx_cycle_t *cycle) 319 ngx_trylock_accept_mutex(ngx_cycle_t *cycle)
671 { 320 {
672 if (ngx_shmtx_trylock(&ngx_accept_mutex)) { 321 if (ngx_shmtx_trylock(&ngx_accept_mutex)) {
673 322
702 351
703 return NGX_OK; 352 return NGX_OK;
704 } 353 }
705 354
706 355
707 static ngx_int_t 356 ngx_int_t
708 ngx_enable_accept_events(ngx_cycle_t *cycle) 357 ngx_enable_accept_events(ngx_cycle_t *cycle)
709 { 358 {
710 ngx_uint_t i; 359 ngx_uint_t i;
711 ngx_listening_t *ls; 360 ngx_listening_t *ls;
712 ngx_connection_t *c; 361 ngx_connection_t *c;
777 ngx_free_connection(c); 426 ngx_free_connection(c);
778 427
779 fd = c->fd; 428 fd = c->fd;
780 c->fd = (ngx_socket_t) -1; 429 c->fd = (ngx_socket_t) -1;
781 430
782 if (!c->shared && ngx_close_socket(fd) == -1) { 431 if (ngx_close_socket(fd) == -1) {
783 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno, 432 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno,
784 ngx_close_socket_n " failed"); 433 ngx_close_socket_n " failed");
785 } 434 }
786 435
787 if (c->pool) { 436 if (c->pool) {
802 } 451 }
803 452
804 453
805 #if (NGX_DEBUG) 454 #if (NGX_DEBUG)
806 455
807 static void 456 void
808 ngx_debug_accepted_connection(ngx_event_conf_t *ecf, ngx_connection_t *c) 457 ngx_debug_accepted_connection(ngx_event_conf_t *ecf, ngx_connection_t *c)
809 { 458 {
810 struct sockaddr_in *sin; 459 struct sockaddr_in *sin;
811 ngx_cidr_t *cidr; 460 ngx_cidr_t *cidr;
812 ngx_uint_t i; 461 ngx_uint_t i;