/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include #include #include 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, socklen, 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 #if (NGX_HAVE_TCP_FASTOPEN) ls->fastopen = -1; #endif return ls; } ngx_int_t ngx_clone_listening(ngx_conf_t *cf, ngx_listening_t *ls) { #if (NGX_HAVE_REUSEPORT) ngx_int_t n; ngx_core_conf_t *ccf; ngx_listening_t ols; if (!ls->reuseport) { return NGX_OK; } ols = *ls; ccf = (ngx_core_conf_t *) ngx_get_conf(cf->cycle->conf_ctx, ngx_core_module); for (n = 1; n < ccf->worker_processes; n++) { /* create a socket for each worker process */ ls = ngx_array_push(&cf->cycle->listening); if (ls == NULL) { return NGX_ERROR; } *ls = ols; ls->worker = n; } #endif return NGX_OK; } 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 || NGX_HAVE_TCP_FASTOPEN) ngx_err_t err; #endif #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 #if (NGX_HAVE_REUSEPORT) int reuseport; #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].socklen, 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) olen = sizeof(int); if (getsockopt(ls[i].fd, 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_REUSEPORT) reuseport = 0; olen = sizeof(int); if (getsockopt(ls[i].fd, SOL_SOCKET, SO_REUSEPORT, (void *) &reuseport, &olen) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "getsockopt(SO_REUSEPORT) %V failed, ignored", &ls[i].addr_text); } else { ls[i].reuseport = reuseport ? 1 : 0; } #endif #if (NGX_HAVE_TCP_FASTOPEN) olen = sizeof(int); if (getsockopt(ls[i].fd, IPPROTO_TCP, TCP_FASTOPEN, (void *) &ls[i].fastopen, &olen) == -1) { err = ngx_socket_errno; if (err != NGX_EOPNOTSUPP && err != NGX_ENOPROTOOPT) { ngx_log_error(NGX_LOG_NOTICE, cycle->log, err, "getsockopt(TCP_FASTOPEN) %V failed, ignored", &ls[i].addr_text); } ls[i].fastopen = -1; } #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_socket_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) { err = ngx_socket_errno; if (err == NGX_EOPNOTSUPP) { continue; } ngx_log_error(NGX_LOG_NOTICE, cycle->log, err, "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 (NGX_HAVE_REUSEPORT) if (ls[i].add_reuseport) { /* * to allow transition from a socket without SO_REUSEPORT * to multiple sockets with SO_REUSEPORT, we have to set * SO_REUSEPORT on the old socket before opening new ones */ int reuseport = 1; if (setsockopt(ls[i].fd, SOL_SOCKET, SO_REUSEPORT, (const void *) &reuseport, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_REUSEPORT) %V failed, ignored", &ls[i].addr_text); } ls[i].add_reuseport = 0; } #endif if (ls[i].fd != (ngx_socket_t) -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 == (ngx_socket_t) -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_REUSEPORT) if (ls[i].reuseport) { int reuseport; reuseport = 1; if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, (const void *) &reuseport, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, "setsockopt(SO_REUSEPORT) %V failed, ignored", &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; } } #endif #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_IOCP_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) { 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; } if (!ngx_test_config) { 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) { err = ngx_socket_errno; /* * on OpenVZ after suspend/resume EADDRINUSE * may be returned by listen() instead of bind(), see * https://bugzilla.openvz.org/show_bug.cgi?id=2470 */ if (err != NGX_EADDRINUSE || !ngx_test_config) { ngx_log_error(NGX_LOG_EMERG, log, err, "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); } if (err != NGX_EADDRINUSE) { return NGX_ERROR; } if (!ngx_test_config) { failed = 1; } continue; } 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 value; ngx_uint_t i; ngx_listening_t *ls; #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) struct accept_filter_arg af; #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) { value = (ls[i].keepalive == 1) ? 1 : 0; if (setsockopt(ls[i].fd, SOL_SOCKET, SO_KEEPALIVE, (const void *) &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_KEEPALIVE, %d) %V failed, ignored", value, &ls[i].addr_text); } } #if (NGX_HAVE_KEEPALIVE_TUNABLE) if (ls[i].keepidle) { value = ls[i].keepidle; #if (NGX_KEEPALIVE_FACTOR) value *= NGX_KEEPALIVE_FACTOR; #endif if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPIDLE, (const void *) &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_KEEPIDLE, %d) %V failed, ignored", value, &ls[i].addr_text); } } if (ls[i].keepintvl) { value = ls[i].keepintvl; #if (NGX_KEEPALIVE_FACTOR) value *= NGX_KEEPALIVE_FACTOR; #endif if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPINTVL, (const void *) &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_KEEPINTVL, %d) %V failed, ignored", value, &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 (NGX_HAVE_TCP_FASTOPEN) if (ls[i].fastopen != -1) { if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_FASTOPEN, (const void *) &ls[i].fastopen, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_FASTOPEN, %d) %V failed, ignored", ls[i].fastopen, &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_socket_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_socket_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) { /* * There is no way to find out how long a connection was * in queue (and a connection may bypass deferred queue at all * if syncookies were used), hence we use 1 second timeout * here. */ value = 1; } else { value = 0; } if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_DEFER_ACCEPT, %d) for %V failed, " "ignored", value, &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_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; } 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); return NULL; } ngx_cycle->free_connections = c->data; ngx_cycle->free_connection_n--; 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) { c->data = ngx_cycle->free_connections; ngx_cycle->free_connections = c; ngx_cycle->free_connection_n++; 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 == (ngx_socket_t) -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 (c->read->posted) { ngx_delete_posted_event(c->read); } if (c->write->posted) { ngx_delete_posted_event(c->write); } c->read->closed = 1; c->write->closed = 1; 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); } } void ngx_close_idle_connections(ngx_cycle_t *cycle) { ngx_uint_t i; ngx_connection_t *c; c = cycle->connections; for (i = 0; i < cycle->connection_n; i++) { /* THREAD: lock */ if (c[i].fd != -1 && c[i].idle) { c[i].close = 1; c[i].read->handler(c[i].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 addr = 0; if (c->local_socklen) { switch (c->local_sockaddr->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) c->local_sockaddr; for (i = 0; addr == 0 && i < 16; i++) { addr |= sin6->sin6_addr.s6_addr[i]; } break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: addr = 1; 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); c->local_socklen = len; } if (s == NULL) { return NGX_OK; } s->len = ngx_sock_ntop(c->local_sockaddr, c->local_socklen, 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; }