| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| |
| |
| ngx_os_io_t ngx_io; |
| |
| |
| static void ngx_drain_connections(void); |
| |
| |
| ngx_listening_t * |
| ngx_create_listening(ngx_conf_t *cf, void *sockaddr, socklen_t socklen) |
| { |
| size_t len; |
| ngx_listening_t *ls; |
| struct sockaddr *sa; |
| u_char text[NGX_SOCKADDR_STRLEN]; |
| |
| ls = ngx_array_push(&cf->cycle->listening); |
| if (ls == NULL) { |
| return NULL; |
| } |
| |
| ngx_memzero(ls, sizeof(ngx_listening_t)); |
| |
| sa = ngx_palloc(cf->pool, socklen); |
| if (sa == NULL) { |
| return NULL; |
| } |
| |
| ngx_memcpy(sa, sockaddr, socklen); |
| |
| ls->sockaddr = sa; |
| ls->socklen = socklen; |
| |
| len = ngx_sock_ntop(sa, text, NGX_SOCKADDR_STRLEN, 1); |
| ls->addr_text.len = len; |
| |
| switch (ls->sockaddr->sa_family) { |
| #if (NGX_HAVE_INET6) |
| case AF_INET6: |
| ls->addr_text_max_len = NGX_INET6_ADDRSTRLEN; |
| break; |
| #endif |
| #if (NGX_HAVE_UNIX_DOMAIN) |
| case AF_UNIX: |
| ls->addr_text_max_len = NGX_UNIX_ADDRSTRLEN; |
| len++; |
| break; |
| #endif |
| case AF_INET: |
| ls->addr_text_max_len = NGX_INET_ADDRSTRLEN; |
| break; |
| default: |
| ls->addr_text_max_len = NGX_SOCKADDR_STRLEN; |
| break; |
| } |
| |
| ls->addr_text.data = ngx_pnalloc(cf->pool, len); |
| if (ls->addr_text.data == NULL) { |
| return NULL; |
| } |
| |
| ngx_memcpy(ls->addr_text.data, text, len); |
| |
| ls->fd = (ngx_socket_t) -1; |
| ls->type = SOCK_STREAM; |
| |
| ls->backlog = NGX_LISTEN_BACKLOG; |
| ls->rcvbuf = -1; |
| ls->sndbuf = -1; |
| |
| #if (NGX_HAVE_SETFIB) |
| ls->setfib = -1; |
| #endif |
| |
| return ls; |
| } |
| |
| |
| ngx_int_t |
| ngx_set_inherited_sockets(ngx_cycle_t *cycle) |
| { |
| size_t len; |
| ngx_uint_t i; |
| ngx_listening_t *ls; |
| socklen_t olen; |
| #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) |
| ngx_err_t err; |
| struct accept_filter_arg af; |
| #endif |
| #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT) |
| int timeout; |
| #endif |
| |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| |
| ls[i].sockaddr = ngx_palloc(cycle->pool, NGX_SOCKADDRLEN); |
| if (ls[i].sockaddr == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ls[i].socklen = NGX_SOCKADDRLEN; |
| if (getsockname(ls[i].fd, ls[i].sockaddr, &ls[i].socklen) == -1) { |
| ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno, |
| "getsockname() of the inherited " |
| "socket #%d failed", ls[i].fd); |
| ls[i].ignore = 1; |
| continue; |
| } |
| |
| switch (ls[i].sockaddr->sa_family) { |
| |
| #if (NGX_HAVE_INET6) |
| case AF_INET6: |
| ls[i].addr_text_max_len = NGX_INET6_ADDRSTRLEN; |
| len = NGX_INET6_ADDRSTRLEN + sizeof(":65535") - 1; |
| break; |
| #endif |
| |
| #if (NGX_HAVE_UNIX_DOMAIN) |
| case AF_UNIX: |
| ls[i].addr_text_max_len = NGX_UNIX_ADDRSTRLEN; |
| len = NGX_UNIX_ADDRSTRLEN; |
| break; |
| #endif |
| |
| case AF_INET: |
| ls[i].addr_text_max_len = NGX_INET_ADDRSTRLEN; |
| len = NGX_INET_ADDRSTRLEN + sizeof(":65535") - 1; |
| break; |
| |
| default: |
| ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno, |
| "the inherited socket #%d has " |
| "an unsupported protocol family", ls[i].fd); |
| ls[i].ignore = 1; |
| continue; |
| } |
| |
| ls[i].addr_text.data = ngx_pnalloc(cycle->pool, len); |
| if (ls[i].addr_text.data == NULL) { |
| return NGX_ERROR; |
| } |
| |
| len = ngx_sock_ntop(ls[i].sockaddr, ls[i].addr_text.data, len, 1); |
| if (len == 0) { |
| return NGX_ERROR; |
| } |
| |
| ls[i].addr_text.len = len; |
| |
| ls[i].backlog = NGX_LISTEN_BACKLOG; |
| |
| olen = sizeof(int); |
| |
| if (getsockopt(ls[i].fd, SOL_SOCKET, SO_RCVBUF, (void *) &ls[i].rcvbuf, |
| &olen) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "getsockopt(SO_RCVBUF) %V failed, ignored", |
| &ls[i].addr_text); |
| |
| ls[i].rcvbuf = -1; |
| } |
| |
| olen = sizeof(int); |
| |
| if (getsockopt(ls[i].fd, SOL_SOCKET, SO_SNDBUF, (void *) &ls[i].sndbuf, |
| &olen) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "getsockopt(SO_SNDBUF) %V failed, ignored", |
| &ls[i].addr_text); |
| |
| ls[i].sndbuf = -1; |
| } |
| |
| #if 0 |
| /* SO_SETFIB is currently a set only option */ |
| |
| #if (NGX_HAVE_SETFIB) |
| |
| if (getsockopt(ls[i].setfib, SOL_SOCKET, SO_SETFIB, |
| (void *) &ls[i].setfib, &olen) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "getsockopt(SO_SETFIB) %V failed, ignored", |
| &ls[i].addr_text); |
| |
| ls[i].setfib = -1; |
| } |
| |
| #endif |
| #endif |
| |
| #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) |
| |
| ngx_memzero(&af, sizeof(struct accept_filter_arg)); |
| olen = sizeof(struct accept_filter_arg); |
| |
| if (getsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, &af, &olen) |
| == -1) |
| { |
| err = ngx_errno; |
| |
| if (err == NGX_EINVAL) { |
| continue; |
| } |
| |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, err, |
| "getsockopt(SO_ACCEPTFILTER) for %V failed, ignored", |
| &ls[i].addr_text); |
| continue; |
| } |
| |
| if (olen < sizeof(struct accept_filter_arg) || af.af_name[0] == '\0') { |
| continue; |
| } |
| |
| ls[i].accept_filter = ngx_palloc(cycle->pool, 16); |
| if (ls[i].accept_filter == NULL) { |
| return NGX_ERROR; |
| } |
| |
| (void) ngx_cpystrn((u_char *) ls[i].accept_filter, |
| (u_char *) af.af_name, 16); |
| #endif |
| |
| #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT) |
| |
| timeout = 0; |
| olen = sizeof(int); |
| |
| if (getsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, &olen) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, ngx_errno, |
| "getsockopt(TCP_DEFER_ACCEPT) for %V failed, ignored", |
| &ls[i].addr_text); |
| continue; |
| } |
| |
| if (olen < sizeof(int) || timeout == 0) { |
| continue; |
| } |
| |
| ls[i].deferred_accept = 1; |
| #endif |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| ngx_int_t |
| ngx_open_listening_sockets(ngx_cycle_t *cycle) |
| { |
| int reuseaddr; |
| ngx_uint_t i, tries, failed; |
| ngx_err_t err; |
| ngx_log_t *log; |
| ngx_socket_t s; |
| ngx_listening_t *ls; |
| |
| reuseaddr = 1; |
| #if (NGX_SUPPRESS_WARN) |
| failed = 0; |
| #endif |
| |
| log = cycle->log; |
| |
| /* TODO: configurable try number */ |
| |
| for (tries = 5; tries; tries--) { |
| failed = 0; |
| |
| /* for each listening socket */ |
| |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| |
| if (ls[i].ignore) { |
| continue; |
| } |
| |
| if (ls[i].fd != -1) { |
| continue; |
| } |
| |
| if (ls[i].inherited) { |
| |
| /* TODO: close on exit */ |
| /* TODO: nonblocking */ |
| /* TODO: deferred accept */ |
| |
| continue; |
| } |
| |
| s = ngx_socket(ls[i].sockaddr->sa_family, ls[i].type, 0); |
| |
| if (s == -1) { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| ngx_socket_n " %V failed", &ls[i].addr_text); |
| return NGX_ERROR; |
| } |
| |
| if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, |
| (const void *) &reuseaddr, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| "setsockopt(SO_REUSEADDR) %V failed", |
| &ls[i].addr_text); |
| |
| if (ngx_close_socket(s) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| ngx_close_socket_n " %V failed", |
| &ls[i].addr_text); |
| } |
| |
| return NGX_ERROR; |
| } |
| |
| #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) |
| |
| if (ls[i].sockaddr->sa_family == AF_INET6) { |
| int ipv6only; |
| |
| ipv6only = ls[i].ipv6only; |
| |
| if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, |
| (const void *) &ipv6only, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| "setsockopt(IPV6_V6ONLY) %V failed, ignored", |
| &ls[i].addr_text); |
| } |
| } |
| #endif |
| /* TODO: close on exit */ |
| |
| if (!(ngx_event_flags & NGX_USE_AIO_EVENT)) { |
| if (ngx_nonblocking(s) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| ngx_nonblocking_n " %V failed", |
| &ls[i].addr_text); |
| |
| if (ngx_close_socket(s) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| ngx_close_socket_n " %V failed", |
| &ls[i].addr_text); |
| } |
| |
| return NGX_ERROR; |
| } |
| } |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_CORE, log, 0, |
| "bind() %V #%d ", &ls[i].addr_text, s); |
| |
| if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) { |
| err = ngx_socket_errno; |
| |
| if (err == NGX_EADDRINUSE && ngx_test_config) { |
| continue; |
| } |
| |
| ngx_log_error(NGX_LOG_EMERG, log, err, |
| "bind() to %V failed", &ls[i].addr_text); |
| |
| if (ngx_close_socket(s) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| ngx_close_socket_n " %V failed", |
| &ls[i].addr_text); |
| } |
| |
| if (err != NGX_EADDRINUSE) { |
| return NGX_ERROR; |
| } |
| |
| failed = 1; |
| |
| continue; |
| } |
| |
| #if (NGX_HAVE_UNIX_DOMAIN) |
| |
| if (ls[i].sockaddr->sa_family == AF_UNIX) { |
| mode_t mode; |
| u_char *name; |
| |
| name = ls[i].addr_text.data + sizeof("unix:") - 1; |
| mode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH); |
| |
| if (chmod((char *) name, mode) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "chmod() \"%s\" failed", name); |
| } |
| |
| if (ngx_test_config) { |
| if (ngx_delete_file(name) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| ngx_delete_file_n " %s failed", name); |
| } |
| } |
| } |
| #endif |
| |
| if (listen(s, ls[i].backlog) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| "listen() to %V, backlog %d failed", |
| &ls[i].addr_text, ls[i].backlog); |
| |
| if (ngx_close_socket(s) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, |
| ngx_close_socket_n " %V failed", |
| &ls[i].addr_text); |
| } |
| |
| return NGX_ERROR; |
| } |
| |
| ls[i].listen = 1; |
| |
| ls[i].fd = s; |
| } |
| |
| if (!failed) { |
| break; |
| } |
| |
| /* TODO: delay configurable */ |
| |
| ngx_log_error(NGX_LOG_NOTICE, log, 0, |
| "try again to bind() after 500ms"); |
| |
| ngx_msleep(500); |
| } |
| |
| if (failed) { |
| ngx_log_error(NGX_LOG_EMERG, log, 0, "still could not bind()"); |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| void |
| ngx_configure_listening_sockets(ngx_cycle_t *cycle) |
| { |
| int keepalive; |
| ngx_uint_t i; |
| ngx_listening_t *ls; |
| |
| #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) |
| struct accept_filter_arg af; |
| #endif |
| #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT) |
| int timeout; |
| #endif |
| |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| |
| ls[i].log = *ls[i].logp; |
| |
| if (ls[i].rcvbuf != -1) { |
| if (setsockopt(ls[i].fd, SOL_SOCKET, SO_RCVBUF, |
| (const void *) &ls[i].rcvbuf, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(SO_RCVBUF, %d) %V failed, ignored", |
| ls[i].rcvbuf, &ls[i].addr_text); |
| } |
| } |
| |
| if (ls[i].sndbuf != -1) { |
| if (setsockopt(ls[i].fd, SOL_SOCKET, SO_SNDBUF, |
| (const void *) &ls[i].sndbuf, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(SO_SNDBUF, %d) %V failed, ignored", |
| ls[i].sndbuf, &ls[i].addr_text); |
| } |
| } |
| |
| if (ls[i].keepalive) { |
| keepalive = (ls[i].keepalive == 1) ? 1 : 0; |
| |
| if (setsockopt(ls[i].fd, SOL_SOCKET, SO_KEEPALIVE, |
| (const void *) &keepalive, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(SO_KEEPALIVE, %d) %V failed, ignored", |
| keepalive, &ls[i].addr_text); |
| } |
| } |
| |
| #if (NGX_HAVE_KEEPALIVE_TUNABLE) |
| |
| if (ls[i].keepidle) { |
| if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPIDLE, |
| (const void *) &ls[i].keepidle, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(TCP_KEEPIDLE, %d) %V failed, ignored", |
| ls[i].keepidle, &ls[i].addr_text); |
| } |
| } |
| |
| if (ls[i].keepintvl) { |
| if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPINTVL, |
| (const void *) &ls[i].keepintvl, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(TCP_KEEPINTVL, %d) %V failed, ignored", |
| ls[i].keepintvl, &ls[i].addr_text); |
| } |
| } |
| |
| if (ls[i].keepcnt) { |
| if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPCNT, |
| (const void *) &ls[i].keepcnt, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(TCP_KEEPCNT, %d) %V failed, ignored", |
| ls[i].keepcnt, &ls[i].addr_text); |
| } |
| } |
| |
| #endif |
| |
| #if (NGX_HAVE_SETFIB) |
| if (ls[i].setfib != -1) { |
| if (setsockopt(ls[i].fd, SOL_SOCKET, SO_SETFIB, |
| (const void *) &ls[i].setfib, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(SO_SETFIB, %d) %V failed, ignored", |
| ls[i].setfib, &ls[i].addr_text); |
| } |
| } |
| #endif |
| |
| #if 0 |
| if (1) { |
| int tcp_nodelay = 1; |
| |
| if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_NODELAY, |
| (const void *) &tcp_nodelay, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "setsockopt(TCP_NODELAY) %V failed, ignored", |
| &ls[i].addr_text); |
| } |
| } |
| #endif |
| |
| if (ls[i].listen) { |
| |
| /* change backlog via listen() */ |
| |
| if (listen(ls[i].fd, ls[i].backlog) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, |
| "listen() to %V, backlog %d failed, ignored", |
| &ls[i].addr_text, ls[i].backlog); |
| } |
| } |
| |
| /* |
| * setting deferred mode should be last operation on socket, |
| * because code may prematurely continue cycle on failure |
| */ |
| |
| #if (NGX_HAVE_DEFERRED_ACCEPT) |
| |
| #ifdef SO_ACCEPTFILTER |
| |
| if (ls[i].delete_deferred) { |
| if (setsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, NULL, 0) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setsockopt(SO_ACCEPTFILTER, NULL) " |
| "for %V failed, ignored", |
| &ls[i].addr_text); |
| |
| if (ls[i].accept_filter) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
| "could not change the accept filter " |
| "to \"%s\" for %V, ignored", |
| ls[i].accept_filter, &ls[i].addr_text); |
| } |
| |
| continue; |
| } |
| |
| ls[i].deferred_accept = 0; |
| } |
| |
| if (ls[i].add_deferred) { |
| ngx_memzero(&af, sizeof(struct accept_filter_arg)); |
| (void) ngx_cpystrn((u_char *) af.af_name, |
| (u_char *) ls[i].accept_filter, 16); |
| |
| if (setsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, |
| &af, sizeof(struct accept_filter_arg)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setsockopt(SO_ACCEPTFILTER, \"%s\") " |
| "for %V failed, ignored", |
| ls[i].accept_filter, &ls[i].addr_text); |
| continue; |
| } |
| |
| ls[i].deferred_accept = 1; |
| } |
| |
| #endif |
| |
| #ifdef TCP_DEFER_ACCEPT |
| |
| if (ls[i].add_deferred || ls[i].delete_deferred) { |
| |
| if (ls[i].add_deferred) { |
| timeout = (int) (ls[i].post_accept_timeout / 1000); |
| |
| } else { |
| timeout = 0; |
| } |
| |
| if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, |
| &timeout, sizeof(int)) |
| == -1) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setsockopt(TCP_DEFER_ACCEPT, %d) for %V failed, " |
| "ignored", |
| timeout, &ls[i].addr_text); |
| |
| continue; |
| } |
| } |
| |
| if (ls[i].add_deferred) { |
| ls[i].deferred_accept = 1; |
| } |
| |
| #endif |
| |
| #endif /* NGX_HAVE_DEFERRED_ACCEPT */ |
| } |
| |
| return; |
| } |
| |
| |
| void |
| ngx_close_listening_sockets(ngx_cycle_t *cycle) |
| { |
| ngx_uint_t i; |
| ngx_listening_t *ls; |
| ngx_connection_t *c; |
| |
| if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
| return; |
| } |
| |
| ngx_accept_mutex_held = 0; |
| ngx_use_accept_mutex = 0; |
| |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| |
| c = ls[i].connection; |
| |
| if (c) { |
| if (c->read->active) { |
| if (ngx_event_flags & NGX_USE_RTSIG_EVENT) { |
| ngx_del_conn(c, NGX_CLOSE_EVENT); |
| |
| } else if (ngx_event_flags & NGX_USE_EPOLL_EVENT) { |
| |
| /* |
| * it seems that Linux-2.6.x OpenVZ sends events |
| * for closed shared listening sockets unless |
| * the events was explicitly deleted |
| */ |
| |
| ngx_del_event(c->read, NGX_READ_EVENT, 0); |
| |
| } else { |
| ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT); |
| } |
| } |
| |
| ngx_free_connection(c); |
| |
| c->fd = (ngx_socket_t) -1; |
| } |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "close listening %V #%d ", &ls[i].addr_text, ls[i].fd); |
| |
| if (ngx_close_socket(ls[i].fd) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno, |
| ngx_close_socket_n " %V failed", &ls[i].addr_text); |
| } |
| |
| #if (NGX_HAVE_UNIX_DOMAIN) |
| |
| if (ls[i].sockaddr->sa_family == AF_UNIX |
| && ngx_process <= NGX_PROCESS_MASTER |
| && ngx_new_binary == 0) |
| { |
| u_char *name = ls[i].addr_text.data + sizeof("unix:") - 1; |
| |
| if (ngx_delete_file(name) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno, |
| ngx_delete_file_n " %s failed", name); |
| } |
| } |
| |
| #endif |
| |
| ls[i].fd = (ngx_socket_t) -1; |
| } |
| |
| cycle->listening.nelts = 0; |
| } |
| |
| |
| ngx_connection_t * |
| ngx_get_connection(ngx_socket_t s, ngx_log_t *log) |
| { |
| ngx_uint_t instance; |
| ngx_event_t *rev, *wev; |
| ngx_connection_t *c; |
| |
| /* disable warning: Win32 SOCKET is u_int while UNIX socket is int */ |
| |
| if (ngx_cycle->files && (ngx_uint_t) s >= ngx_cycle->files_n) { |
| ngx_log_error(NGX_LOG_ALERT, log, 0, |
| "the new socket has number %d, " |
| "but only %ui files are available", |
| s, ngx_cycle->files_n); |
| return NULL; |
| } |
| |
| /* ngx_mutex_lock */ |
| |
| c = ngx_cycle->free_connections; |
| |
| if (c == NULL) { |
| ngx_drain_connections(); |
| c = ngx_cycle->free_connections; |
| } |
| |
| if (c == NULL) { |
| ngx_log_error(NGX_LOG_ALERT, log, 0, |
| "%ui worker_connections are not enough", |
| ngx_cycle->connection_n); |
| |
| /* ngx_mutex_unlock */ |
| |
| return NULL; |
| } |
| |
| ngx_cycle->free_connections = c->data; |
| ngx_cycle->free_connection_n--; |
| |
| /* ngx_mutex_unlock */ |
| |
| if (ngx_cycle->files) { |
| ngx_cycle->files[s] = c; |
| } |
| |
| rev = c->read; |
| wev = c->write; |
| |
| ngx_memzero(c, sizeof(ngx_connection_t)); |
| |
| c->read = rev; |
| c->write = wev; |
| c->fd = s; |
| c->log = log; |
| |
| instance = rev->instance; |
| |
| ngx_memzero(rev, sizeof(ngx_event_t)); |
| ngx_memzero(wev, sizeof(ngx_event_t)); |
| |
| rev->instance = !instance; |
| wev->instance = !instance; |
| |
| rev->index = NGX_INVALID_INDEX; |
| wev->index = NGX_INVALID_INDEX; |
| |
| rev->data = c; |
| wev->data = c; |
| |
| wev->write = 1; |
| |
| return c; |
| } |
| |
| |
| void |
| ngx_free_connection(ngx_connection_t *c) |
| { |
| /* ngx_mutex_lock */ |
| |
| c->data = ngx_cycle->free_connections; |
| ngx_cycle->free_connections = c; |
| ngx_cycle->free_connection_n++; |
| |
| /* ngx_mutex_unlock */ |
| |
| if (ngx_cycle->files) { |
| ngx_cycle->files[c->fd] = NULL; |
| } |
| } |
| |
| |
| void |
| ngx_close_connection(ngx_connection_t *c) |
| { |
| ngx_err_t err; |
| ngx_uint_t log_error, level; |
| ngx_socket_t fd; |
| |
| if (c->fd == -1) { |
| ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed"); |
| return; |
| } |
| |
| if (c->read->timer_set) { |
| ngx_del_timer(c->read); |
| } |
| |
| if (c->write->timer_set) { |
| ngx_del_timer(c->write); |
| } |
| |
| if (ngx_del_conn) { |
| ngx_del_conn(c, NGX_CLOSE_EVENT); |
| |
| } else { |
| if (c->read->active || c->read->disabled) { |
| ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT); |
| } |
| |
| if (c->write->active || c->write->disabled) { |
| ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT); |
| } |
| } |
| |
| #if (NGX_THREADS) |
| |
| /* |
| * we have to clean the connection information before the closing |
| * because another thread may reopen the same file descriptor |
| * before we clean the connection |
| */ |
| |
| ngx_mutex_lock(ngx_posted_events_mutex); |
| |
| if (c->read->prev) { |
| ngx_delete_posted_event(c->read); |
| } |
| |
| if (c->write->prev) { |
| ngx_delete_posted_event(c->write); |
| } |
| |
| c->read->closed = 1; |
| c->write->closed = 1; |
| |
| ngx_unlock(&c->lock); |
| c->read->locked = 0; |
| c->write->locked = 0; |
| |
| ngx_mutex_unlock(ngx_posted_events_mutex); |
| |
| #else |
| |
| if (c->read->prev) { |
| ngx_delete_posted_event(c->read); |
| } |
| |
| if (c->write->prev) { |
| ngx_delete_posted_event(c->write); |
| } |
| |
| c->read->closed = 1; |
| c->write->closed = 1; |
| |
| #endif |
| |
| ngx_reusable_connection(c, 0); |
| |
| log_error = c->log_error; |
| |
| ngx_free_connection(c); |
| |
| fd = c->fd; |
| c->fd = (ngx_socket_t) -1; |
| |
| if (ngx_close_socket(fd) == -1) { |
| |
| err = ngx_socket_errno; |
| |
| if (err == NGX_ECONNRESET || err == NGX_ENOTCONN) { |
| |
| switch (log_error) { |
| |
| case NGX_ERROR_INFO: |
| level = NGX_LOG_INFO; |
| break; |
| |
| case NGX_ERROR_ERR: |
| level = NGX_LOG_ERR; |
| break; |
| |
| default: |
| level = NGX_LOG_CRIT; |
| } |
| |
| } else { |
| level = NGX_LOG_CRIT; |
| } |
| |
| /* we use ngx_cycle->log because c->log was in c->pool */ |
| |
| ngx_log_error(level, ngx_cycle->log, err, |
| ngx_close_socket_n " %d failed", fd); |
| } |
| } |
| |
| |
| void |
| ngx_reusable_connection(ngx_connection_t *c, ngx_uint_t reusable) |
| { |
| ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, |
| "reusable connection: %ui", reusable); |
| |
| if (c->reusable) { |
| ngx_queue_remove(&c->queue); |
| |
| #if (NGX_STAT_STUB) |
| (void) ngx_atomic_fetch_add(ngx_stat_waiting, -1); |
| #endif |
| } |
| |
| c->reusable = reusable; |
| |
| if (reusable) { |
| /* need cast as ngx_cycle is volatile */ |
| |
| ngx_queue_insert_head( |
| (ngx_queue_t *) &ngx_cycle->reusable_connections_queue, &c->queue); |
| |
| #if (NGX_STAT_STUB) |
| (void) ngx_atomic_fetch_add(ngx_stat_waiting, 1); |
| #endif |
| } |
| } |
| |
| |
| static void |
| ngx_drain_connections(void) |
| { |
| ngx_int_t i; |
| ngx_queue_t *q; |
| ngx_connection_t *c; |
| |
| for (i = 0; i < 32; i++) { |
| if (ngx_queue_empty(&ngx_cycle->reusable_connections_queue)) { |
| break; |
| } |
| |
| q = ngx_queue_last(&ngx_cycle->reusable_connections_queue); |
| c = ngx_queue_data(q, ngx_connection_t, queue); |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_CORE, c->log, 0, |
| "reusing connection"); |
| |
| c->close = 1; |
| c->read->handler(c->read); |
| } |
| } |
| |
| |
| ngx_int_t |
| ngx_connection_local_sockaddr(ngx_connection_t *c, ngx_str_t *s, |
| ngx_uint_t port) |
| { |
| socklen_t len; |
| ngx_uint_t addr; |
| u_char sa[NGX_SOCKADDRLEN]; |
| struct sockaddr_in *sin; |
| #if (NGX_HAVE_INET6) |
| ngx_uint_t i; |
| struct sockaddr_in6 *sin6; |
| #endif |
| |
| switch (c->local_sockaddr->sa_family) { |
| |
| #if (NGX_HAVE_INET6) |
| case AF_INET6: |
| sin6 = (struct sockaddr_in6 *) c->local_sockaddr; |
| |
| for (addr = 0, i = 0; addr == 0 && i < 16; i++) { |
| addr |= sin6->sin6_addr.s6_addr[i]; |
| } |
| |
| break; |
| #endif |
| |
| default: /* AF_INET */ |
| sin = (struct sockaddr_in *) c->local_sockaddr; |
| addr = sin->sin_addr.s_addr; |
| break; |
| } |
| |
| if (addr == 0) { |
| |
| len = NGX_SOCKADDRLEN; |
| |
| if (getsockname(c->fd, (struct sockaddr *) &sa, &len) == -1) { |
| ngx_connection_error(c, ngx_socket_errno, "getsockname() failed"); |
| return NGX_ERROR; |
| } |
| |
| c->local_sockaddr = ngx_palloc(c->pool, len); |
| if (c->local_sockaddr == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memcpy(c->local_sockaddr, &sa, len); |
| } |
| |
| if (s == NULL) { |
| return NGX_OK; |
| } |
| |
| s->len = ngx_sock_ntop(c->local_sockaddr, s->data, s->len, port); |
| |
| return NGX_OK; |
| } |
| |
| |
| ngx_int_t |
| ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text) |
| { |
| ngx_uint_t level; |
| |
| /* Winsock may return NGX_ECONNABORTED instead of NGX_ECONNRESET */ |
| |
| if ((err == NGX_ECONNRESET |
| #if (NGX_WIN32) |
| || err == NGX_ECONNABORTED |
| #endif |
| ) && c->log_error == NGX_ERROR_IGNORE_ECONNRESET) |
| { |
| return 0; |
| } |
| |
| #if (NGX_SOLARIS) |
| if (err == NGX_EINVAL && c->log_error == NGX_ERROR_IGNORE_EINVAL) { |
| return 0; |
| } |
| #endif |
| |
| if (err == 0 |
| || err == NGX_ECONNRESET |
| #if (NGX_WIN32) |
| || err == NGX_ECONNABORTED |
| #else |
| || err == NGX_EPIPE |
| #endif |
| || err == NGX_ENOTCONN |
| || err == NGX_ETIMEDOUT |
| || err == NGX_ECONNREFUSED |
| || err == NGX_ENETDOWN |
| || err == NGX_ENETUNREACH |
| || err == NGX_EHOSTDOWN |
| || err == NGX_EHOSTUNREACH) |
| { |
| switch (c->log_error) { |
| |
| case NGX_ERROR_IGNORE_EINVAL: |
| case NGX_ERROR_IGNORE_ECONNRESET: |
| case NGX_ERROR_INFO: |
| level = NGX_LOG_INFO; |
| break; |
| |
| default: |
| level = NGX_LOG_ERR; |
| } |
| |
| } else { |
| level = NGX_LOG_ALERT; |
| } |
| |
| ngx_log_error(level, c->log, err, text); |
| |
| return NGX_ERROR; |
| } |