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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
static int ngx_unix_recv_error(ngx_event_t *rev, ngx_err_t err);
#if (HAVE_KQUEUE)
ssize_t ngx_unix_recv(ngx_connection_t *c, char *buf, size_t size)
{
ssize_t n;
ngx_event_t *rev;
rev = c->read;
if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) {
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"recv: eof:%d, avail:%d, err:%d",
rev->kq_eof, rev->available, rev->kq_errno);
if (rev->available == 0) {
if (rev->kq_eof) {
rev->ready = 0;
rev->eof = 1;
if (rev->kq_errno) {
rev->error = 1;
ngx_set_socket_errno(rev->kq_errno);
ngx_log_error(NGX_LOG_INFO, c->log, rev->kq_errno,
"kevent() reported about closed connection");
if (rev->kq_errno == NGX_ECONNRESET
&& rev->log_error == NGX_ERROR_IGNORE_ECONNRESET)
{
return 0;
}
return NGX_ERROR;
}
return 0;
} else {
return NGX_AGAIN;
}
}
}
do {
n = recv(c->fd, buf, size, 0);
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,"recv: %d:%d", n, size);
if (n >= 0) {
if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) {
rev->available -= n;
/*
* rev->available can be negative here because some additional
* bytes can be received between kevent() and recv()
*/
if (rev->available <= 0) {
if (!rev->kq_eof) {
rev->ready = 0;
}
if (rev->available < 0) {
rev->available = 0;
}
}
return n;
}
if ((size_t) n < size) {
rev->ready = 0;
}
if (n == 0) {
rev->eof = 1;
}
return n;
}
n = ngx_unix_recv_error(rev, ngx_socket_errno);
} while (n == NGX_EINTR);
/* NGX_ERROR || NGX_AGAIN */
rev->ready = 0;
if (n == NGX_ERROR){
rev->error = 1;
}
return n;
}
#else /* ! NAVE_KQUEUE */
ssize_t ngx_unix_recv(ngx_connection_t *c, char *buf, size_t size)
{
ssize_t n;
ngx_event_t *rev;
rev = c->read;
do {
n = recv(c->fd, buf, size, 0);
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,"recv: %d:%d", n, size);
if (n >= 0) {
if ((size_t) n < size) {
rev->ready = 0;
}
if (n == 0) {
rev->eof = 1;
}
return n;
}
n = ngx_unix_recv_error(rev, ngx_socket_errno);
} while (n == NGX_EINTR);
/* NGX_ERROR || NGX_AGAIN */
rev->ready = 0;
if (n == NGX_ERROR){
rev->error = 1;
}
return n;
}
#endif /* NAVE_KQUEUE */
static int ngx_unix_recv_error(ngx_event_t *rev, ngx_err_t err)
{
ngx_int_t level;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, rev->log, err, "recv() not ready");
return NGX_AGAIN;
}
if (err == NGX_ECONNRESET) {
switch (rev->log_error) {
case NGX_ERROR_IGNORE_ECONNRESET:
return 0;
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, rev->log, err, "recv() failed");
return NGX_ERROR;
}
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