mirror of
https://github.com/nginx/nginx.git
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cdf609a925
*) Feature: the "uninitialized_variable_warn" directive; the logging level of the "uninitialized variable" message was lowered from "alert" to "warn". *) Feature: the "override_charset" directive. *) Change: now if the unknown variable is used in the "echo" and "if expr='$name'" SSI-commands, then the "unknown variable" message is not logged. *) Bugfix: the active connection counter increased on the exceeding of the connection limit specified by the "worker_connections" directive; the bug had appeared in 0.2.0. *) Bugfix: the limit rate might not work on some condition; the bug had appeared in 0.3.38.
768 lines
20 KiB
C
768 lines
20 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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ngx_os_io_t ngx_io;
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ngx_listening_t *
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ngx_listening_inet_stream_socket(ngx_conf_t *cf, in_addr_t addr, in_port_t port)
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{
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size_t len;
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ngx_listening_t *ls;
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struct sockaddr_in *sin;
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ls = ngx_array_push(&cf->cycle->listening);
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if (ls == NULL) {
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return NULL;
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}
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ngx_memzero(ls, sizeof(ngx_listening_t));
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sin = ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in));
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if (sin == NULL) {
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return NULL;
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}
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = addr;
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sin->sin_port = htons(port);
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ls->addr_text.data = ngx_palloc(cf->pool,
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INET_ADDRSTRLEN - 1 + sizeof(":65535") - 1);
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if (ls->addr_text.data == NULL) {
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return NULL;
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}
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len = ngx_inet_ntop(AF_INET, &addr, ls->addr_text.data, INET_ADDRSTRLEN);
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ls->addr_text.len = ngx_sprintf(ls->addr_text.data + len, ":%d", port)
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- ls->addr_text.data;
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ls->fd = (ngx_socket_t) -1;
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ls->family = AF_INET;
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ls->type = SOCK_STREAM;
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ls->sockaddr = (struct sockaddr *) sin;
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ls->socklen = sizeof(struct sockaddr_in);
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ls->addr = offsetof(struct sockaddr_in, sin_addr);
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ls->addr_text_max_len = INET_ADDRSTRLEN;
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return ls;
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}
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ngx_int_t
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ngx_set_inherited_sockets(ngx_cycle_t *cycle)
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{
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size_t len;
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ngx_uint_t i;
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ngx_listening_t *ls;
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struct sockaddr_in *sin;
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socklen_t olen;
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#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
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ngx_err_t err;
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struct accept_filter_arg af;
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#endif
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#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
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int timeout;
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#endif
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ls = cycle->listening.elts;
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for (i = 0; i < cycle->listening.nelts; i++) {
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/* AF_INET only */
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ls[i].sockaddr = ngx_palloc(cycle->pool, sizeof(struct sockaddr_in));
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if (ls[i].sockaddr == NULL) {
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return NGX_ERROR;
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}
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ls[i].socklen = sizeof(struct sockaddr_in);
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if (getsockname(ls[i].fd, ls[i].sockaddr, &ls[i].socklen) == -1) {
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ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
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"getsockname() of the inherited "
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"socket #%d failed", ls[i].fd);
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ls[i].ignore = 1;
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continue;
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}
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sin = (struct sockaddr_in *) ls[i].sockaddr;
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if (sin->sin_family != AF_INET) {
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ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
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"the inherited socket #%d has "
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"unsupported family", ls[i].fd);
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ls[i].ignore = 1;
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continue;
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}
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ls[i].addr_text_max_len = INET_ADDRSTRLEN;
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ls[i].addr_text.data = ngx_palloc(cycle->pool, INET_ADDRSTRLEN - 1
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+ sizeof(":65535") - 1);
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if (ls[i].addr_text.data == NULL) {
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return NGX_ERROR;
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}
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ls[i].family = sin->sin_family;
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len = ngx_sock_ntop(ls[i].family, ls[i].sockaddr,
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ls[i].addr_text.data, INET_ADDRSTRLEN);
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if (len == 0) {
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return NGX_ERROR;
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}
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ls[i].addr_text.len = ngx_sprintf(ls[i].addr_text.data + len, ":%d",
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ntohs(sin->sin_port))
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- ls[i].addr_text.data;
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ls[i].backlog = -1;
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olen = sizeof(int);
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if (getsockopt(ls[i].fd, SOL_SOCKET, SO_RCVBUF, (void *) &ls[i].rcvbuf,
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&olen)
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
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"getsockopt(SO_RCVBUF) %V failed, ignored",
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&ls[i].addr_text);
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ls[i].rcvbuf = -1;
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}
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olen = sizeof(int);
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if (getsockopt(ls[i].fd, SOL_SOCKET, SO_SNDBUF, (void *) &ls[i].sndbuf,
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&olen)
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
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"getsockopt(SO_SNDBUF) %V failed, ignored",
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&ls[i].addr_text);
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ls[i].sndbuf = -1;
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}
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#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
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ngx_memzero(&af, sizeof(struct accept_filter_arg));
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olen = sizeof(struct accept_filter_arg);
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if (getsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, &af, &olen)
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== -1)
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{
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err = ngx_errno;
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if (err == NGX_EINVAL) {
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continue;
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}
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ngx_log_error(NGX_LOG_NOTICE, cycle->log, err,
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"getsockopt(SO_ACCEPTFILTER) for %V failed, ignored",
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&ls[i].addr_text);
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continue;
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}
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if (olen < sizeof(struct accept_filter_arg) || af.af_name[0] == '\0') {
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continue;
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}
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ls[i].accept_filter = ngx_palloc(cycle->pool, 16);
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if (ls[i].accept_filter == NULL) {
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return NGX_ERROR;
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}
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(void) ngx_cpystrn((u_char *) ls[i].accept_filter,
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(u_char *) af.af_name, 16);
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#endif
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#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
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timeout = 0;
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olen = sizeof(int);
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if (getsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, &olen)
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== -1)
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{
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ngx_log_error(NGX_LOG_NOTICE, cycle->log, ngx_errno,
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"getsockopt(TCP_DEFER_ACCEPT) for %V failed, ignored",
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&ls[i].addr_text);
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continue;
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}
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if (olen < sizeof(int) || timeout == 0) {
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continue;
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}
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ls[i].deferred_accept = 1;
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#endif
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}
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return NGX_OK;
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}
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ngx_int_t
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ngx_open_listening_sockets(ngx_cycle_t *cycle)
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{
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int reuseaddr;
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ngx_uint_t i, tries, failed;
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ngx_err_t err;
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ngx_log_t *log;
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ngx_socket_t s;
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ngx_listening_t *ls;
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reuseaddr = 1;
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#if (NGX_SUPPRESS_WARN)
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failed = 0;
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#endif
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log = cycle->log;
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/* TODO: configurable try number */
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for (tries = 5 ; tries; tries--) {
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failed = 0;
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/* for each listening socket */
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ls = cycle->listening.elts;
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for (i = 0; i < cycle->listening.nelts; i++) {
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if (ls[i].ignore) {
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continue;
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}
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if (ls[i].fd != -1) {
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continue;
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}
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if (ls[i].inherited) {
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/* TODO: close on exit */
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/* TODO: nonblocking */
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/* TODO: deferred accept */
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continue;
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}
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s = ngx_socket(ls[i].family, ls[i].type, 0);
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if (s == -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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ngx_socket_n " %V failed", &ls[i].addr_text);
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return NGX_ERROR;
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}
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if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
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(const void *) &reuseaddr, sizeof(int))
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== -1)
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{
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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"setsockopt(SO_REUSEADDR) %V failed",
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&ls[i].addr_text);
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if (ngx_close_socket(s) == -1)
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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ngx_close_socket_n " %V failed",
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&ls[i].addr_text);
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return NGX_ERROR;
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}
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/* TODO: close on exit */
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if (!(ngx_event_flags & NGX_USE_AIO_EVENT)) {
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if (ngx_nonblocking(s) == -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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ngx_nonblocking_n " %V failed",
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&ls[i].addr_text);
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if (ngx_close_socket(s) == -1)
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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ngx_close_socket_n " %V failed",
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&ls[i].addr_text);
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return NGX_ERROR;
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}
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}
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ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
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"bind() %V #%d ", &ls[i].addr_text, s);
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if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) {
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err = ngx_socket_errno;
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if (err == NGX_EADDRINUSE && ngx_test_config) {
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continue;
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}
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ngx_log_error(NGX_LOG_EMERG, log, err,
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"bind() to %V failed", &ls[i].addr_text);
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if (ngx_close_socket(s) == -1)
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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ngx_close_socket_n " %V failed",
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&ls[i].addr_text);
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if (err != NGX_EADDRINUSE) {
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return NGX_ERROR;
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}
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failed = 1;
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continue;
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}
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ls[i].listen = 1;
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ls[i].fd = s;
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}
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if (!failed) {
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break;
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}
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/* TODO: delay configurable */
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ngx_log_error(NGX_LOG_NOTICE, log, 0,
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"try again to bind() after 500ms");
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ngx_msleep(500);
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}
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if (failed) {
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ngx_log_error(NGX_LOG_EMERG, log, 0, "still could not bind()");
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return NGX_ERROR;
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}
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return NGX_OK;
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}
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void
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ngx_configure_listening_socket(ngx_cycle_t *cycle)
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{
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ngx_uint_t i;
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ngx_listening_t *ls;
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#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
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struct accept_filter_arg af;
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#endif
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#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
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int timeout;
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#endif
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ls = cycle->listening.elts;
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for (i = 0; i < cycle->listening.nelts; i++) {
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if (ls[i].rcvbuf != -1) {
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if (setsockopt(ls[i].fd, SOL_SOCKET, SO_RCVBUF,
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(const void *) &ls[i].rcvbuf, sizeof(int))
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
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"setsockopt(SO_RCVBUF, %d) %V failed, ignored",
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ls[i].rcvbuf, &ls[i].addr_text);
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}
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}
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if (ls[i].sndbuf != -1) {
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if (setsockopt(ls[i].fd, SOL_SOCKET, SO_SNDBUF,
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(const void *) &ls[i].sndbuf, sizeof(int))
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
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"setsockopt(SO_SNDBUF, %d) %V failed, ignored",
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ls[i].sndbuf, &ls[i].addr_text);
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}
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}
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#if 0
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if (1) {
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int tcp_nodelay = 1;
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if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_NODELAY,
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(const void *) &tcp_nodelay, sizeof(int))
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
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"setsockopt(TCP_NODELAY) %V failed, ignored",
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&ls[i].addr_text);
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}
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}
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#endif
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if (ls[i].listen) {
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if (listen(ls[i].fd, ls[i].backlog) == -1) {
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
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"changing the listen() backlog to %d "
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"for %V failed, ignored",
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&ls[i].addr_text, ls[i].backlog);
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}
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}
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/*
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* setting deferred mode should be last operation on socket,
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* because code may prematurely continue cycle on failure
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*/
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#if (NGX_HAVE_DEFERRED_ACCEPT)
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#ifdef SO_ACCEPTFILTER
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if (ls[i].delete_deferred) {
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if (setsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, NULL, 0)
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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"setsockopt(SO_ACCEPTFILTER, NULL) "
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"for %V failed, ignored",
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&ls[i].addr_text);
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if (ls[i].accept_filter) {
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ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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"could not change the accept filter "
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"to \"%s\" for %V, ignored",
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ls[i].accept_filter, &ls[i].addr_text);
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}
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continue;
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}
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ls[i].deferred_accept = 0;
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}
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if (ls[i].add_deferred) {
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ngx_memzero(&af, sizeof(struct accept_filter_arg));
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(void) ngx_cpystrn((u_char *) af.af_name,
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(u_char *) ls[i].accept_filter, 16);
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if (setsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER,
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&af, sizeof(struct accept_filter_arg))
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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"setsockopt(SO_ACCEPTFILTER, \"%s\") "
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" for %V failed, ignored",
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ls[i].accept_filter, &ls[i].addr_text);
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continue;
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}
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ls[i].deferred_accept = 1;
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}
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#endif
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#ifdef TCP_DEFER_ACCEPT
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if (ls[i].add_deferred || ls[i].delete_deferred) {
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if (ls[i].add_deferred) {
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timeout = (int) (ls[i].post_accept_timeout / 1000);
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} else {
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timeout = 0;
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}
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if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT,
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&timeout, sizeof(int))
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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"setsockopt(TCP_DEFER_ACCEPT, %d) for %V failed, "
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"ignored",
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timeout, &ls[i].addr_text);
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continue;
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}
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}
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if (ls[i].add_deferred) {
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ls[i].deferred_accept = 1;
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}
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#endif
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#endif /* NGX_HAVE_DEFERRED_ACCEPT */
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}
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return;
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}
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void
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ngx_close_listening_sockets(ngx_cycle_t *cycle)
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{
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ngx_uint_t i;
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ngx_listening_t *ls;
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ngx_connection_t *c;
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if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
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return;
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}
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ngx_accept_mutex_held = 0;
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ngx_use_accept_mutex = 0;
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ls = cycle->listening.elts;
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for (i = 0; i < cycle->listening.nelts; i++) {
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c = ls[i].connection;
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|
if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
if (c->read->active) {
|
|
ngx_del_conn(c, NGX_CLOSE_EVENT);
|
|
}
|
|
|
|
} else {
|
|
if (c->read->active) {
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
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_log_error(NGX_LOG_ALERT, log, 0,
|
|
"%ui worker_connections is 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_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;
|
|
|
|
if (c->single_connection) {
|
|
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_free_connection(c);
|
|
|
|
fd = c->fd;
|
|
c->fd = (ngx_socket_t) -1;
|
|
|
|
if (ngx_close_socket(fd) == -1) {
|
|
|
|
/* we use ngx_cycle->log because c->log was in c->pool */
|
|
|
|
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_socket_errno,
|
|
ngx_close_socket_n " failed");
|
|
}
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text)
|
|
{
|
|
ngx_uint_t level;
|
|
|
|
if (err == NGX_ECONNRESET
|
|
&& c->log_error == NGX_ERROR_IGNORE_ECONNRESET)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
if (err == 0
|
|
|| err == NGX_ECONNRESET
|
|
#if !(NGX_WIN32)
|
|
|| err == NGX_EPIPE
|
|
#endif
|
|
|| err == NGX_ENOTCONN
|
|
|| err == NGX_ETIMEDOUT
|
|
|| err == NGX_ECONNREFUSED
|
|
|| err == NGX_EHOSTUNREACH)
|
|
{
|
|
switch (c->log_error) {
|
|
|
|
case NGX_ERROR_IGNORE_ECONNRESET:
|
|
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;
|
|
}
|
|
|
|
ngx_log_error(level, c->log, err, text);
|
|
|
|
return NGX_ERROR;
|
|
}
|