new file mode 100644
--- /dev/null
+++ b/src/os/win32/ngx_wsarecv.c
@@ -0,0 +1,90 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+
+
+ssize_t ngx_wsarecv(ngx_connection_t *c, char *buf, size_t size)
+{
+    int               rc;
+    u_int             flags;
+    size_t            bytes;
+    WSABUF            wsabuf[1];
+    ngx_err_t         err;
+    ngx_event_t      *rev;
+    LPWSAOVERLAPPED   ovlp;
+
+    rev = c->read;
+    bytes = 0;
+
+    if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) && rev->ready) {
+        rev->ready = 0;
+
+        /* the overlapped WSARecv() completed */
+
+        if (ngx_event_flags & NGX_HAVE_IOCP_EVENT) {
+            if (rev->ovlp.error) {
+                ngx_log_error(NGX_LOG_ERR, c->log, rev->ovlp.error,
+                              "WSARecv() failed");
+                return NGX_ERROR;
+            }
+
+            return rev->available;
+        }
+
+        if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp,
+                                   &bytes, 0, NULL) == 0) {
+            err = ngx_socket_errno;
+            ngx_log_error(NGX_LOG_CRIT, c->log, err,
+                         "WSARecv() or WSAGetOverlappedResult() failed");
+
+            return NGX_ERROR;
+        }
+
+        return bytes;
+    }
+
+    if (ngx_event_flags & NGX_HAVE_AIO_EVENT) {
+        ovlp = (LPWSAOVERLAPPED) &c->read->ovlp;
+        ngx_memzero(ovlp, sizeof(WSAOVERLAPPED));
+
+    } else {
+        ovlp = NULL;
+    }
+
+    wsabuf[0].buf = buf;
+    wsabuf[0].len = size;
+    flags = 0;
+
+    rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL);
+
+    ngx_log_debug(c->log, "WSARecv: %d:%d" _ rc _ bytes);
+
+    if (rc == -1) {
+        err = ngx_socket_errno;
+        if (err == WSA_IO_PENDING) {
+            return NGX_AGAIN;
+
+        } else if (err == WSAEWOULDBLOCK) {
+            ngx_log_error(NGX_LOG_INFO, c->log, err, "WSARecv() EAGAIN");
+            return NGX_AGAIN;
+
+        } else {
+            ngx_log_error(NGX_LOG_CRIT, c->log, err, "WSARecv() failed");
+            return NGX_ERROR;
+        }
+    }
+
+    if (ngx_event_flags & NGX_HAVE_IOCP_EVENT) {
+
+        /*
+         * If a socket was bound with I/O completion port
+         * then GetQueuedCompletionStatus() would anyway return its status
+         * despite that WSARecv() was already completed.
+         */
+
+        return NGX_AGAIN;
+    }
+
+    return bytes;
+}