diff --git a/ChangeLog b/ChangeLog
index 4390fbf..78d391e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+05/07/2014 Oleg Moskalenko <mom040267@gmail.com>
+Version 4.0.0.1 'Threetrees':
+	- Kernel channel placeholder definitions.
+
 05/02/2014 Oleg Moskalenko <mom040267@gmail.com>
 Version 4.0.0.0 'Threetrees':
 	- Multi-tenant server.
diff --git a/rpm/build.settings.sh b/rpm/build.settings.sh
index 098b0ed..a85378f 100755
--- a/rpm/build.settings.sh
+++ b/rpm/build.settings.sh
@@ -2,7 +2,7 @@
 
 # Common settings script.
 
-TURNVERSION=4.0.0.0
+TURNVERSION=4.0.0.1
 BUILDDIR=~/rpmbuild
 ARCH=`uname -p`
 TURNSERVER_SVN_URL=http://coturn.googlecode.com/svn
diff --git a/rpm/turnserver.spec b/rpm/turnserver.spec
index 37dfbe8..2b63720 100644
--- a/rpm/turnserver.spec
+++ b/rpm/turnserver.spec
@@ -1,5 +1,5 @@
 Name:		turnserver
-Version:	4.0.0.0
+Version:	4.0.0.1
 Release:	0%{dist}
 Summary:	Coturn TURN Server
 
@@ -288,6 +288,8 @@ fi
 %{_includedir}/turn/client/TurnMsgLib.h
 
 %changelog
+* Wed May 07 2014 Oleg Moskalenko <mom040267@gmail.com>
+  - Sync to 4.0.0.1
 * Wed Apr 30 2014 Oleg Moskalenko <mom040267@gmail.com>
   - Sync to 4.0.0.0
 * Tue Feb 04 2014 Oleg Moskalenko <mom040267@gmail.com>
diff --git a/src/ns_turn_defs.h b/src/ns_turn_defs.h
index 274e1f7..05f602d 100644
--- a/src/ns_turn_defs.h
+++ b/src/ns_turn_defs.h
@@ -31,7 +31,7 @@
 #ifndef __IOADEFS__
 #define __IOADEFS__
 
-#define TURN_SERVER_VERSION "4.0.0.0"
+#define TURN_SERVER_VERSION "4.0.0.1"
 #define TURN_SERVER_VERSION_NAME "Threetrees"
 #define TURN_SOFTWARE "Coturn-"TURN_SERVER_VERSION" '"TURN_SERVER_VERSION_NAME"'"
 
@@ -174,6 +174,20 @@ typedef enum _SHATYPE SHATYPE;
 
 #define SHA_TOO_WEAK (426)
 
+//////////////// KERNEL-LEVEL CHANNEL HANDLERS /////////
+
+#if !defined(TURN_CHANNEL_HANDLER_KERNEL)
+#define TURN_CHANNEL_HANDLER_KERNEL void*
+#endif
+
+#if !defined(CREATE_TURN_CHANNEL_KERNEL)
+#define CREATE_TURN_CHANNEL_KERNEL(channel_number, address_family_client, address_family_peer, protocol_client, client_addr, local_addr, local_relay_addr, peer_addr) ((TURN_CHANNEL_HANDLER_KERNEL)(1))
+#endif
+
+#if !defined(DELETE_TURN_CHANNEL_KERNEL)
+#define DELETE_TURN_CHANNEL_KERNEL(handler)
+#endif
+
 ////////////////////////////////////////////////////////
 
 #ifdef __cplusplus
diff --git a/src/server/ns_turn_allocation.c b/src/server/ns_turn_allocation.c
index e337aab..f53be24 100644
--- a/src/server/ns_turn_allocation.c
+++ b/src/server/ns_turn_allocation.c
@@ -215,10 +215,14 @@ static turn_permission_info* get_from_turn_permission_hashtable(turn_permission_
 }
 
 static void ch_info_clean(ch_info* c) {
-  if(c) {
-    IOA_EVENT_DEL(c->lifetime_ev);
-    ns_bzero(c,sizeof(ch_info));
-  }
+  if (c) {
+		if (c->kernel_channel) {
+			DELETE_TURN_CHANNEL_KERNEL(c->kernel_channel);
+			c->kernel_channel = 0;
+		}
+		IOA_EVENT_DEL(c->lifetime_ev);
+		ns_bzero(c,sizeof(ch_info));
+	}
 }
 
 static int delete_channel_info_from_allocation_map(ur_map_key_type key, ur_map_value_type value)
diff --git a/src/server/ns_turn_allocation.h b/src/server/ns_turn_allocation.h
index 200db1f..f0da2a0 100644
--- a/src/server/ns_turn_allocation.h
+++ b/src/server/ns_turn_allocation.h
@@ -127,6 +127,7 @@ typedef struct _ch_info {
   turn_time_t expiration_time;
   ioa_timer_handle lifetime_ev;
   void *owner; //perm
+  TURN_CHANNEL_HANDLER_KERNEL kernel_channel;
 } ch_info;
 
 ///////////// "channel" map /////////////////////
diff --git a/src/server/ns_turn_server.c b/src/server/ns_turn_server.c
index e5738f8..c80520e 100644
--- a/src/server/ns_turn_server.c
+++ b/src/server/ns_turn_server.c
@@ -2241,6 +2241,19 @@ static int handle_turn_channel_bind(turn_turnserver *server,
 				  stun_set_channel_bind_response_str(ioa_network_buffer_data(nbh), &len, tid, 0, NULL);
 				  ioa_network_buffer_set_size(nbh,len);
 				  *resp_constructed = 1;
+
+				  if(get_ioa_socket_type(ss->client_session.s) == UDP_SOCKET ||
+						  get_ioa_socket_type(ss->client_session.s) == TCP_SOCKET) {
+					  chn->kernel_channel = CREATE_TURN_CHANNEL_KERNEL(chn->chnum,
+						  get_ioa_socket_address_family(ss->client_session.s),
+						  get_ioa_socket_address_family(ss->alloc.relay_session.s),
+						  get_ioa_socket_type(ss->client_session.s)==UDP_SOCKET ? IPPROTO_UDP : IPPROTO_TCP,
+						  &(get_remote_addr_from_ioa_socket(ss->client_session.s)->ss),
+						  &(get_local_addr_from_ioa_socket(ss->client_session.s)->ss),
+						  &(get_local_addr_from_ioa_socket(ss->alloc.relay_session.s)),
+						  &(get_remote_addr_from_ioa_socket(ss->alloc.relay_session.s))
+						  );
+				  }
 			  }
 			}
 		}