new file mode 100644
--- /dev/null
+++ b/src/event/ngx_event_connect.h
@@ -0,0 +1,67 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_EVENT_CONNECT_H_INCLUDED_
+#define _NGX_EVENT_CONNECT_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+
+
+#define NGX_CONNECT_ERROR   -10
+
+
+typedef struct {
+    in_addr_t          addr;
+    ngx_str_t          host;
+    in_port_t          port;
+    ngx_str_t          addr_port_text;
+
+    ngx_int_t          fails;
+    time_t             accessed;
+} ngx_peer_t;
+
+
+typedef struct {
+    ngx_int_t           current;
+    ngx_int_t           number;
+    ngx_int_t           max_fails;
+    ngx_int_t           fail_timeout;
+    ngx_int_t           last_cached;
+
+ /* ngx_mutex_t        *mutex; */
+    ngx_connection_t  **cached;
+
+    ngx_peer_t          peers[1];
+} ngx_peers_t;
+
+
+typedef struct {
+    ngx_peers_t       *peers;
+    ngx_int_t          cur_peer;
+    ngx_int_t          tries;
+
+    ngx_connection_t  *connection;
+#if (NGX_THREADS)
+    ngx_atomic_t      *lock;
+#endif
+
+    int                rcvbuf;
+
+    ngx_log_t         *log;
+
+    unsigned           cached:1;
+    unsigned           log_error:2;  /* ngx_connection_log_error_e */
+} ngx_peer_connection_t;
+
+
+int ngx_event_connect_peer(ngx_peer_connection_t *pc);
+void ngx_event_connect_peer_failed(ngx_peer_connection_t *pc);
+
+
+#endif /* _NGX_EVENT_CONNECT_H_INCLUDED_ */