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#include <nginx.h>
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_types.h>
#include <ngx_log.h>
#include <ngx_connection.h>
#include <ngx_event.h>
#include <ngx_event_close.h>
#include <ngx_event_accept.h>
/* This function should always return NGX_OK even there are some failures
because if we return NGX_ERROR then listening socket would be closed */
int ngx_event_accept(ngx_event_t *ev)
{
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;
ls = (ngx_connection_t *) ev->data;
ngx_log_debug(ev->log, "ngx_event_accept: accept ready: %d" _
ev->available);
ev->ready = 0;
#if 0
/* DEBUG */ ev->available++;
#endif
do {
ngx_test_null(pool, ngx_create_pool(ls->pool_size, ev->log), NGX_OK);
ngx_test_null(sa, ngx_palloc(pool, ls->socklen), NGX_OK);
len = ls->socklen;
s = accept(ls->fd, sa, &len);
if (s == -1) {
err = ngx_socket_errno;
ngx_destroy_pool(pool);
if (err == NGX_EAGAIN) {
ngx_log_error(NGX_LOG_NOTICE, ev->log, err,
"EAGAIN while accept %s", ls->addr_text.data);
return NGX_OK;
}
ngx_log_error(NGX_LOG_ALERT, ev->log, err,
"accept %s failed", ls->addr_text.data);
return NGX_OK;
}
#if (HAVE_INHERITED_NONBLOCK)
#if (HAVE_AIO_EVENT)
if ((ngx_event_flags & NGX_HAVE_AIO_EVENT)) {
if (ngx_blocking(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_blocking_n " %s failed", ls->addr_text.data);
return NGX_OK;
}
}
#endif
#else /* !HAVE_INHERITED_NONBLOCK */
#if (HAVE_AIO_EVENT)
if (!(ngx_event_flags & NGX_HAVE_AIO_EVENT)) {
if (ngx_nonblocking(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_nonblocking_n " %s failed", ls->addr_text.data);
return NGX_OK;
}
}
#else
if (ngx_nonblocking(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
ngx_nonblocking_n " %s failed", ls->addr_text.data);
return NGX_OK;
}
#endif
#endif /* HAVE_INHERITED_NONBLOCK */
rev = &ngx_read_events[s];
wev = &ngx_write_events[s];
c = &ngx_connections[s];
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->sockaddr = sa;
c->family = ls->family;
c->socklen = len;
c->addr = ls->addr;
c->addr_text_max_len = ls->addr_text_max_len;
c->post_accept_timeout = ls->post_accept_timeout;
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 (HAVE_AIO_EVENT)
if (!(ngx_event_flags & NGX_HAVE_AIO_EVENT)) {
wev->ready = 1;
}
#endif
/* STUB ? */ wev->timer = rev->timer = 10000;
wev->timer_handler = rev->timer_handler = ngx_event_close_connection;
wev->close_handler = rev->close_handler = ngx_event_close_connection;
c->ctx = ls->ctx;
c->servers = ls->servers;
ngx_test_null(c->log, ngx_palloc(c->pool, sizeof(ngx_log_t)), NGX_OK);
ngx_memcpy(c->log, ev->log, sizeof(ngx_log_t));
rev->log = wev->log = c->log;
/* STUB: x86: SP: xadd ?, MT: lock xadd, MP: lock xadd, shared */
c->number = ngx_connection_counter++;
ngx_log_debug(ev->log, "ngx_event_accept: accept: %d, %d" _
s _ c->number);
#if (HAVE_DEFERRED_ACCEPT)
if (ev->accept_filter) {
rev->ready = 1;
}
#endif
ls->handler(c);
#if (USE_KQUEUE)
ev->available--;
#elif (HAVE_KQUEUE)
if (ngx_event_type == NGX_HAVE_KQUEUE_EVENT) {
ev->available--;
}
#endif
} while (ev->available);
return NGX_OK;
}
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