nginx/src/core/ngx_connection.c

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2004-01-06 04:55:48 +08:00
/*
* Copyright (C) Igor Sysoev
2012-01-18 23:07:43 +08:00
* Copyright (C) Nginx, Inc.
*/
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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
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ngx_os_io_t ngx_io;
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static void ngx_drain_connections(void);
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ngx_listening_t *
ngx_create_listening(ngx_conf_t *cf, void *sockaddr, socklen_t socklen)
{
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size_t len;
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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);
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ls->addr_text.len = len;
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switch (ls->sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
ls->addr_text_max_len = NGX_INET6_ADDRSTRLEN;
break;
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#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
ls->addr_text_max_len = NGX_UNIX_ADDRSTRLEN;
len++;
break;
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#endif
case AF_INET:
ls->addr_text_max_len = NGX_INET_ADDRSTRLEN;
break;
default:
ls->addr_text_max_len = NGX_SOCKADDR_STRLEN;
break;
}
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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;
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ls->backlog = NGX_LISTEN_BACKLOG;
ls->rcvbuf = -1;
ls->sndbuf = -1;
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#if (NGX_HAVE_SETFIB)
ls->setfib = -1;
#endif
#if (NGX_HAVE_TCP_FASTOPEN)
ls->fastopen = -1;
#endif
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return ls;
}
ngx_int_t
ngx_set_inherited_sockets(ngx_cycle_t *cycle)
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{
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
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ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
ls[i].sockaddr = ngx_palloc(cycle->pool, NGX_SOCKADDRLEN);
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if (ls[i].sockaddr == NULL) {
return NGX_ERROR;
}
ls[i].socklen = NGX_SOCKADDRLEN;
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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;
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continue;
}
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switch (ls[i].sockaddr->sa_family) {
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#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;
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break;
#endif
case AF_INET:
ls[i].addr_text_max_len = NGX_INET_ADDRSTRLEN;
len = NGX_INET_ADDRSTRLEN + sizeof(":65535") - 1;
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break;
default:
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ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
"the inherited socket #%d has "
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"an unsupported protocol family", ls[i].fd);
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ls[i].ignore = 1;
continue;
}
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ls[i].addr_text.data = ngx_pnalloc(cycle->pool, len);
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if (ls[i].addr_text.data == NULL) {
return NGX_ERROR;
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}
len = ngx_sock_ntop(ls[i].sockaddr, ls[i].socklen,
ls[i].addr_text.data, len, 1);
if (len == 0) {
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return NGX_ERROR;
}
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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;
}
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#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,
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(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_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
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}
return NGX_OK;
}
ngx_int_t
ngx_open_listening_sockets(ngx_cycle_t *cycle)
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{
int reuseaddr;
ngx_uint_t i, tries, failed;
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ngx_err_t err;
ngx_log_t *log;
ngx_socket_t s;
ngx_listening_t *ls;
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reuseaddr = 1;
#if (NGX_SUPPRESS_WARN)
failed = 0;
#endif
log = cycle->log;
/* TODO: configurable try number */
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for (tries = 5; tries; tries--) {
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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 != (ngx_socket_t) -1) {
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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);
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if (s == (ngx_socket_t) -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_socket_n " %V failed", &ls[i].addr_text);
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return NGX_ERROR;
}
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
(const void *) &reuseaddr, sizeof(int))
== -1)
{
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
"setsockopt(SO_REUSEADDR) %V failed",
&ls[i].addr_text);
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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);
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}
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return NGX_ERROR;
}
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#if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
if (ls[i].sockaddr->sa_family == AF_INET6) {
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int ipv6only;
ipv6only = ls[i].ipv6only;
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if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
(const void *) &ipv6only, sizeof(int))
== -1)
{
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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"setsockopt(IPV6_V6ONLY) %V failed, ignored",
&ls[i].addr_text);
}
}
#endif
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/* 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);
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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);
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}
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return NGX_ERROR;
}
}
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ngx_log_debug2(NGX_LOG_DEBUG_CORE, log, 0,
"bind() %V #%d ", &ls[i].addr_text, s);
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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);
}
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if (ngx_close_socket(s) == -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_close_socket_n " %V failed",
&ls[i].addr_text);
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}
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if (err != NGX_EADDRINUSE) {
return NGX_ERROR;
}
if (!ngx_test_config) {
failed = 1;
}
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continue;
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}
#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;
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ls[i].fd = s;
}
if (!failed) {
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break;
}
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/* TODO: delay configurable */
ngx_log_error(NGX_LOG_NOTICE, log, 0,
"try again to bind() after 500ms");
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ngx_msleep(500);
}
if (failed) {
ngx_log_error(NGX_LOG_EMERG, log, 0, "still could not bind()");
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return NGX_ERROR;
}
return NGX_OK;
}
void
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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);
}
}
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#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
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#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) {
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/* change backlog via listen() */
if (listen(ls[i].fd, ls[i].backlog) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
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"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)
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{
ngx_uint_t i;
ngx_listening_t *ls;
ngx_connection_t *c;
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if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
return;
}
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ngx_accept_mutex_held = 0;
ngx_use_accept_mutex = 0;
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ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
c = ls[i].connection;
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if (c) {
if (c->read->active) {
if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
ngx_del_conn(c, NGX_CLOSE_EVENT);
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} else if (ngx_event_flags & NGX_USE_EPOLL_EVENT) {
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/*
* it seems that Linux-2.6.x OpenVZ sends events
* for closed shared listening sockets unless
* the events was explicitly deleted
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*/
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ngx_del_event(c->read, NGX_READ_EVENT, 0);
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} else {
ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
}
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}
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ngx_free_connection(c);
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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) {
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ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
ngx_close_socket_n " %V failed", &ls[i].addr_text);
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}
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#if (NGX_HAVE_UNIX_DOMAIN)
if (ls[i].sockaddr->sa_family == AF_UNIX
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&& ngx_process <= NGX_PROCESS_MASTER
&& ngx_new_binary == 0)
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{
u_char *name = ls[i].addr_text.data + sizeof("unix:") - 1;
if (ngx_delete_file(name) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
ngx_delete_file_n " %s failed", name);
}
}
#endif
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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;
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if (c == NULL) {
ngx_drain_connections();
c = ngx_cycle->free_connections;
}
if (c == NULL) {
ngx_log_error(NGX_LOG_ALERT, log, 0,
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"%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;
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}
}
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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 (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,
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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);
}
}
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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
if (c->local_socklen == 0) {
return NGX_ERROR;
}
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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
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
addr = 1;
break;
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#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;
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}
if (s == NULL) {
return NGX_OK;
}
s->len = ngx_sock_ntop(c->local_sockaddr, c->local_socklen,
s->data, s->len, port);
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return NGX_OK;
}
ngx_int_t
ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text)
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{
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ngx_uint_t level;
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2009-04-29 21:07:16 +08:00
/* Winsock may return NGX_ECONNABORTED instead of NGX_ECONNRESET */
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if ((err == NGX_ECONNRESET
#if (NGX_WIN32)
|| err == NGX_ECONNABORTED
#endif
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) && c->log_error == NGX_ERROR_IGNORE_ECONNRESET)
{
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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
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|| err == NGX_EPIPE
#endif
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|| err == NGX_ENOTCONN
|| err == NGX_ETIMEDOUT
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|| err == NGX_ECONNREFUSED
|| err == NGX_ENETDOWN
|| err == NGX_ENETUNREACH
|| err == NGX_EHOSTDOWN
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|| err == NGX_EHOSTUNREACH)
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{
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switch (c->log_error) {
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case NGX_ERROR_IGNORE_EINVAL:
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case NGX_ERROR_IGNORE_ECONNRESET:
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case NGX_ERROR_INFO:
level = NGX_LOG_INFO;
break;
default:
level = NGX_LOG_ERR;
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}
} else {
level = NGX_LOG_ALERT;
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}
ngx_log_error(level, c->log, err, text);
return NGX_ERROR;
}