tcp-1.7.10.patch

diff -rupN nginx-1.7.10-original/src/core/ngx_log.c nginx-1.7.10/src/core/ngx_log.c
--- nginx-1.7.10-original/src/core/ngx_log.c	2015-02-23 14:16:30.058140183 -0300
+++ nginx-1.7.10/src/core/ngx_log.c	2015-02-23 14:17:09.821292306 -0300
@@ -69,7 +69,7 @@ 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-1.7.10-original/src/core/ngx_log.h nginx-1.7.10/src/core/ngx_log.h
--- nginx-1.7.10-original/src/core/ngx_log.h	2015-02-23 14:16:30.056140125 -0300
+++ nginx-1.7.10/src/core/ngx_log.h	2015-02-23 14:17:43.398265187 -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-1.7.10-original/src/event/ngx_event_connect.h nginx-1.7.10/src/event/ngx_event_connect.h
--- nginx-1.7.10-original/src/event/ngx_event_connect.h	2015-02-23 14:16:30.055140096 -0300
+++ nginx-1.7.10/src/event/ngx_event_connect.h	2015-02-23 14:18:49.025166704 -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;
 
@@ -42,6 +43,9 @@ struct ngx_peer_connection_s {
     ngx_str_t                       *name;
 
     ngx_uint_t                       tries;
+
+    ngx_uint_t                       check_index;
+
     ngx_msec_t                       start_time;
 
     ngx_event_get_peer_pt            get;