blob: 316e0516d14b8f3ab4aec3e0eced2b60ac3478dd [file] [log] [blame] [raw]
/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#if (NGX_HAVE_KQUEUE)
ssize_t
ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
{
ssize_t n;
ngx_err_t err;
ngx_event_t *rev;
rev = c->read;
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"recv: eof:%d, avail:%d, err:%d",
rev->pending_eof, rev->available, rev->kq_errno);
if (rev->available == 0) {
if (rev->pending_eof) {
rev->ready = 0;
rev->eof = 1;
if (rev->kq_errno) {
rev->error = 1;
ngx_set_socket_errno(rev->kq_errno);
return ngx_connection_error(c, rev->kq_errno,
"kevent() reported about an closed connection");
}
return 0;
} else {
rev->ready = 0;
return NGX_AGAIN;
}
}
}
do {
n = recv(c->fd, buf, size, 0);
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"recv: fd:%d %d of %d", c->fd, n, size);
if (n >= 0) {
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
rev->available -= n;
/*
* rev->available may be negative here because some additional
* bytes may be received between kevent() and recv()
*/
if (rev->available <= 0) {
if (!rev->pending_eof) {
rev->ready = 0;
}
if (rev->available < 0) {
rev->available = 0;
}
}
if (n == 0) {
/*
* on FreeBSD recv() may return 0 on closed socket
* even if kqueue reported about available data
*/
rev->eof = 1;
rev->available = 0;
}
return n;
}
if ((size_t) n < size) {
rev->ready = 0;
}
if (n == 0) {
rev->eof = 1;
}
return n;
}
err = ngx_socket_errno;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"recv() not ready");
n = NGX_AGAIN;
} else {
n = ngx_connection_error(c, err, "recv() failed");
break;
}
} while (err == NGX_EINTR);
rev->ready = 0;
if (n == NGX_ERROR) {
rev->error = 1;
}
return n;
}
#else /* ! NGX_HAVE_KQUEUE */
ssize_t
ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
{
ssize_t n;
ngx_err_t err;
ngx_event_t *rev;
rev = c->read;
do {
n = recv(c->fd, buf, size, 0);
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"recv: fd:%d %d of %d", c->fd, n, size);
if (n == 0) {
rev->ready = 0;
rev->eof = 1;
return n;
} else if (n > 0) {
if ((size_t) n < size
&& !(ngx_event_flags & NGX_USE_GREEDY_EVENT))
{
rev->ready = 0;
}
return n;
}
err = ngx_socket_errno;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"recv() not ready");
n = NGX_AGAIN;
} else {
n = ngx_connection_error(c, err, "recv() failed");
break;
}
} while (err == NGX_EINTR);
rev->ready = 0;
if (n == NGX_ERROR) {
rev->error = 1;
}
return n;
}
#endif /* NGX_HAVE_KQUEUE */