tcp-1.4.7.patch

diff -rupN nginx-1.4.7-original/src/core/ngx_log.c nginx-1.4.7/src/core/ngx_log.c
--- nginx-1.4.7-original/src/core/ngx_log.c	2014-03-18 10:17:10.000000000 -0300
+++ nginx-1.4.7/src/core/ngx_log.c	2014-03-26 15:40:30.493781496 -0300
@@ -67,7 +67,7 @@ static ngx_str_t err_levels[] = {
 
 static const char *debug_levels[] = {
     "debug_core", "debug_alloc", "debug_mutex", "debug_event",
-    "debug_http", "debug_mail", "debug_mysql"
+    "debug_http", "debug_mail", "debug_mysql", "debug_tcp"
 };
 
 
diff -rupN nginx-1.4.7-original/src/core/ngx_log.h nginx-1.4.7/src/core/ngx_log.h
--- nginx-1.4.7-original/src/core/ngx_log.h	2014-03-18 10:17:10.000000000 -0300
+++ nginx-1.4.7/src/core/ngx_log.h	2014-03-26 15:41:01.097780601 -0300
@@ -30,6 +30,7 @@
 #define NGX_LOG_DEBUG_HTTP        0x100
 #define NGX_LOG_DEBUG_MAIL        0x200
 #define NGX_LOG_DEBUG_MYSQL       0x400
+#define NGX_LOG_DEBUG_TCP         0x800
 
 /*
  * do not forget to update debug_levels[] in src/core/ngx_log.c
@@ -37,7 +38,7 @@
  */
 
 #define NGX_LOG_DEBUG_FIRST       NGX_LOG_DEBUG_CORE
-#define NGX_LOG_DEBUG_LAST        NGX_LOG_DEBUG_MYSQL
+#define NGX_LOG_DEBUG_LAST        NGX_LOG_DEBUG_TCP
 #define NGX_LOG_DEBUG_CONNECTION  0x80000000
 #define NGX_LOG_DEBUG_ALL         0x7ffffff0
 
diff -rupN nginx-1.4.7-original/src/event/ngx_event_connect.h nginx-1.4.7/src/event/ngx_event_connect.h
--- nginx-1.4.7-original/src/event/ngx_event_connect.h	2014-03-18 10:17:10.000000000 -0300
+++ nginx-1.4.7/src/event/ngx_event_connect.h	2014-03-26 15:41:38.965779494 -0300
@@ -18,6 +18,7 @@
 #define NGX_PEER_NEXT                2
 #define NGX_PEER_FAILED              4
 
+#define NGX_INVALID_CHECK_INDEX (ngx_uint_t)(-1)
 
 typedef struct ngx_peer_connection_s  ngx_peer_connection_t;
 
@@ -43,6 +44,8 @@ struct ngx_peer_connection_s {
 
     ngx_uint_t                       tries;
 
+	ngx_uint_t                       check_index;
+
     ngx_event_get_peer_pt            get;
     ngx_event_free_peer_pt           free;
     void                            *data;