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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <nginx.h>
void ngx_event_accept(ngx_event_t *ev)
{
int instance;
socklen_t len;
struct sockaddr *sa;
ngx_err_t err;
ngx_pool_t *pool;
ngx_socket_t s;
ngx_event_t *rev, *wev;
ngx_connection_t *c, *ls;
ngx_event_conf_t *ecf;
ecf = ngx_event_get_conf(ngx_event_module);
ls = ev->data;
ngx_log_debug(ev->log, "ngx_event_accept: accept ready: %d" _
ev->available);
ev->ready = 0;
do {
/*
* Create the pool before accept() to avoid copy the sockaddr.
* Although accept() can fail it's an uncommon case
* and the pool can be got from the free pool list
*/
pool = ngx_create_pool(ls->listening->pool_size, ev->log);
if (pool == NULL) {
return;
}
sa = ngx_palloc(pool, ls->listening->socklen);
if (sa == NULL) {
return;
}
len = ls->listening->socklen;
ngx_log_debug(ev->log, "ADDR %s" _ ls->listening->addr_text.data);
s = accept(ls->fd, sa, &len);
if (s == -1) {
err = ngx_socket_errno;
if (err == NGX_EAGAIN) {
ngx_log_error(NGX_LOG_NOTICE, ev->log, err,
"EAGAIN while accept() %s",
ls->listening->addr_text.data);
return;
}
ngx_log_error(NGX_LOG_ALERT, ev->log, err,
"accept() %s failed", ls->listening->addr_text.data);
ngx_destroy_pool(pool);
return;
}
/* disable warnings: Win32 SOCKET is u_int while UNIX socket is int */
if ((unsigned) s >= (unsigned) ecf->connections) {
ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
"accept() %s returned socket #%d while "
"only %d connections was configured, "
"sleeping for 1 second",
ls->listening->addr_text.data, s, ecf->connections);
if (ngx_close_socket(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_close_socket_n " %s failed",
ls->listening->addr_text.data);
}
ngx_msleep(1000);
ngx_destroy_pool(pool);
return;
}
/* set a blocking mode for aio and non-blocking mode for others */
if (ngx_inherited_nonblocking) {
if ((ngx_event_flags & NGX_USE_AIO_EVENT)) {
if (ngx_blocking(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_blocking_n " %s failed",
ls->listening->addr_text.data);
if (ngx_close_socket(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_close_socket_n " %s failed",
ls->listening->addr_text.data);
}
ngx_destroy_pool(pool);
return;
}
}
} else {
if ((ngx_event_flags & NGX_USE_AIO_EVENT) == 0) {
if (ngx_nonblocking(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_nonblocking_n " %s failed",
ls->listening->addr_text.data);
if (ngx_close_socket(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_close_socket_n " %s failed",
ls->listening->addr_text.data);
}
ngx_destroy_pool(pool);
return;
}
}
}
#if (WIN32)
/*
* Winsock assignes a socket number divisible by 4
* so to find a connection we divide a socket number by 4.
*/
if (s % 4) {
ngx_log_error(NGX_LOG_EMERG, ls->log, 0,
ngx_socket_n " created socket %d", s);
exit(1);
}
rev = &ngx_read_events[s / 4];
wev = &ngx_write_events[s / 4];
c = &ngx_connections[s / 4];
#else
rev = &ngx_read_events[s];
wev = &ngx_write_events[s];
c = &ngx_connections[s];
#endif
instance = rev->instance;
ngx_memzero(rev, sizeof(ngx_event_t));
ngx_memzero(wev, sizeof(ngx_event_t));
ngx_memzero(c, sizeof(ngx_connection_t));
c->pool = pool;
c->listening = ls->listening;
c->sockaddr = sa;
c->socklen = len;
rev->instance = wev->instance = !instance;
rev->index = wev->index = NGX_INVALID_INDEX;
rev->data = wev->data = c;
c->read = rev;
c->write = wev;
c->fd = s;
c->unexpected_eof = 1;
wev->write = 1;
if ((ngx_event_flags & NGX_USE_AIO_EVENT) == 0) {
wev->ready = 1;
}
c->ctx = ls->ctx;
c->servers = ls->servers;
c->log = ngx_palloc(c->pool, sizeof(ngx_log_t));
if (c->log == NULL) {
return;
}
ngx_memcpy(c->log, ev->log, sizeof(ngx_log_t));
rev->log = wev->log = c->log;
/* TODO: x86: MT: lock xadd, MP: lock xadd, shared */
c->number = ngx_connection_counter++;
ngx_log_debug(ev->log, "accept: %d, %d" _ s _ c->number);
if (ev->deferred_accept) {
rev->ready = 1;
}
if (ngx_add_conn) {
if (ngx_add_conn(c) == NGX_ERROR) {
if (ngx_close_socket(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_close_socket_n " %s failed",
ls->listening->addr_text.data);
}
ngx_destroy_pool(pool);
return;
}
}
ls->listening->handler(c);
if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) {
ev->available--;
}
} while (ev->available);
return;
}
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