Adding upstream version 2.4.38.upstream/2.4.38

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

15 files changed, 3113 insertions, 0 deletions

diff --git a/modules/cluster/Makefile.in b/modules/cluster/Makefile.in
new file mode 100644
index 0000000..7c5c149
--- /dev/null
+++ b/modules/cluster/Makefile.in
@@ -0,0 +1,3 @@
+# a modules Makefile has no explicit targets -- they will be defined by
+# whatever modules are enabled. just grab special.mk to deal with this.
+include $(top_srcdir)/build/special.mk
diff --git a/modules/cluster/NWGNUmakefile b/modules/cluster/NWGNUmakefile
new file mode 100644
index 0000000..eda07b1
--- /dev/null
+++ b/modules/cluster/NWGNUmakefile
@@ -0,0 +1,246 @@
+#
+# Declare the sub-directories to be built here
+#
+
+SUBDIRS = \
+	$(EOLIST)
+
+#
+# Get the 'head' of the build environment.  This includes default targets and
+# paths to tools
+#
+
+include $(AP_WORK)/build/NWGNUhead.inc
+
+#
+# build this level's files
+
+#
+# Make sure all needed macro's are defined
+#
+
+#
+# These directories will be at the beginning of the include list, followed by
+# INCDIRS
+#
+XINCDIRS	+= \
+			$(EOLIST)
+
+#
+# These flags will come after CFLAGS
+#
+XCFLAGS		+= \
+			$(EOLIST)
+
+#
+# These defines will come after DEFINES
+#
+XDEFINES	+= \
+			$(EOLIST)
+
+#
+# These flags will be added to the link.opt file
+#
+XLFLAGS		+= \
+			$(EOLIST)
+
+#
+# These values will be appended to the correct variables based on the value of
+# RELEASE
+#
+ifeq "$(RELEASE)" "debug"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+ifeq "$(RELEASE)" "noopt"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+ifeq "$(RELEASE)" "release"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+#
+# These are used by the link target if an NLM is being generated
+# This is used by the link 'name' directive to name the nlm.  If left blank
+# TARGET_nlm (see below) will be used.
+#
+NLM_NAME	=
+
+#
+# This is used by the link '-desc ' directive.
+# If left blank, NLM_NAME will be used.
+#
+NLM_DESCRIPTION	=
+
+#
+# This is used by the '-threadname' directive.  If left blank,
+# NLM_NAME Thread will be used.
+#
+NLM_THREAD_NAME	=
+
+#
+# If this is specified, it will override VERSION value in
+# $(AP_WORK)/build/NWGNUenvironment.inc
+#
+NLM_VERSION	=
+
+#
+# If this is specified, it will override the default of 64K
+#
+NLM_STACK_SIZE	=
+
+
+#
+# If this is specified it will be used by the link '-entry' directive
+#
+NLM_ENTRY_SYM	=
+
+#
+# If this is specified it will be used by the link '-exit' directive
+#
+NLM_EXIT_SYM	=
+
+#
+# If this is specified it will be used by the link '-check' directive
+#
+NLM_CHECK_SYM	=
+
+#
+# If these are specified it will be used by the link '-flags' directive
+#
+NLM_FLAGS	=
+
+#
+# If this is specified it will be linked in with the XDCData option in the def
+# file instead of the default of $(NWOS)/apache.xdc.  XDCData can be disabled
+# by setting APACHE_UNIPROC in the environment
+#
+XDCDATA		=
+
+#
+# If there is an NLM target, put it here
+#
+TARGET_nlm = \
+	$(OBJDIR)/modheartbeat.nlm \
+	$(OBJDIR)/modheartmonitor.nlm \
+	$(EOLIST)
+
+#
+# If there is an LIB target, put it here
+#
+TARGET_lib = \
+	$(EOLIST)
+
+#
+# These are the OBJ files needed to create the NLM target above.
+# Paths must all use the '/' character
+#
+FILES_nlm_objs = \
+	$(EOLIST)
+
+#
+# These are the LIB files needed to create the NLM target above.
+# These will be added as a library command in the link.opt file.
+#
+FILES_nlm_libs = \
+	$(EOLIST)
+
+#
+# These are the modules that the above NLM target depends on to load.
+# These will be added as a module command in the link.opt file.
+#
+FILES_nlm_modules = \
+	$(EOLIST)
+
+#
+# If the nlm has a msg file, put it's path here
+#
+FILE_nlm_msg =
+
+#
+# If the nlm has a hlp file put it's path here
+#
+FILE_nlm_hlp =
+
+#
+# If this is specified, it will override $(NWOS)\copyright.txt.
+#
+FILE_nlm_copyright =
+
+#
+# Any additional imports go here
+#
+FILES_nlm_Ximports = \
+	$(EOLIST)
+
+#
+# Any symbols exported to here
+#
+FILES_nlm_exports = \
+	$(EOLIST)
+
+#
+# These are the OBJ files needed to create the LIB target above.
+# Paths must all use the '/' character
+#
+FILES_lib_objs = \
+	$(EOLIST)
+
+#
+# implement targets and dependancies (leave this section alone)
+#
+
+libs :: $(OBJDIR) $(TARGET_lib)
+
+nlms :: libs $(TARGET_nlm)
+
+#
+# Updated this target to create necessary directories and copy files to the
+# correct place.  (See $(AP_WORK)/build/NWGNUhead.inc for examples)
+#
+install :: nlms FORCE
+	$(call COPY,$(OBJDIR)/*.nlm, $(INSTALLBASE)/modules/)
+
+#
+# Any specialized rules here
+#
+
+#
+# Include the 'tail' makefile that has targets that depend on variables defined
+# in this makefile
+#
+
+include $(APBUILD)/NWGNUtail.inc
+
+
diff --git a/modules/cluster/NWGNUmodheartbeat b/modules/cluster/NWGNUmodheartbeat
new file mode 100644
index 0000000..b2c3ece
--- /dev/null
+++ b/modules/cluster/NWGNUmodheartbeat
@@ -0,0 +1,257 @@
+#
+# Declare the sub-directories to be built here
+#
+
+SUBDIRS = \
+	$(EOLIST)
+
+#
+# Get the 'head' of the build environment.  This includes default targets and
+# paths to tools
+#
+
+include $(AP_WORK)/build/NWGNUhead.inc
+
+#
+# build this level's files
+
+#
+# Make sure all needed macro's are defined
+#
+
+#
+# These directories will be at the beginning of the include list, followed by
+# INCDIRS
+#
+XINCDIRS	+= \
+			$(APR)/include \
+			$(APRUTIL)/include \
+			$(AP_WORK)/include \
+			$(AP_WORK)/modules/core \
+			$(NWOS) \
+			$(EOLIST)
+
+#
+# These flags will come after CFLAGS
+#
+XCFLAGS		+= \
+			$(EOLIST)
+
+#
+# These defines will come after DEFINES
+#
+XDEFINES	+= \
+			$(EOLIST)
+
+#
+# These flags will be added to the link.opt file
+#
+XLFLAGS		+= \
+			$(EOLIST)
+
+#
+# These values will be appended to the correct variables based on the value of
+# RELEASE
+#
+ifeq "$(RELEASE)" "debug"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+ifeq "$(RELEASE)" "noopt"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+ifeq "$(RELEASE)" "release"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+#
+# These are used by the link target if an NLM is being generated
+# This is used by the link 'name' directive to name the nlm.  If left blank
+# TARGET_nlm (see below) will be used.
+#
+NLM_NAME	= modheartbeat
+
+#
+# This is used by the link '-desc ' directive.
+# If left blank, NLM_NAME will be used.
+#
+NLM_DESCRIPTION	= Apache $(VERSION_STR) Heart Beat Module
+
+#
+# This is used by the '-threadname' directive.  If left blank,
+# NLM_NAME Thread will be used.
+#
+NLM_THREAD_NAME	= modheartbeat
+
+#
+# If this is specified, it will override VERSION value in
+# $(AP_WORK)/build/NWGNUenvironment.inc
+#
+NLM_VERSION	=
+
+#
+# If this is specified, it will override the default of 64K
+#
+NLM_STACK_SIZE	= 8192
+
+
+#
+# If this is specified it will be used by the link '-entry' directive
+#
+NLM_ENTRY_SYM	=
+
+#
+# If this is specified it will be used by the link '-exit' directive
+#
+NLM_EXIT_SYM	=
+
+#
+# If this is specified it will be used by the link '-check' directive
+#
+NLM_CHECK_SYM	=
+
+#
+# If these are specified it will be used by the link '-flags' directive
+#
+NLM_FLAGS	=
+
+#
+# If this is specified it will be linked in with the XDCData option in the def
+# file instead of the default of $(NWOS)/apache.xdc.  XDCData can be disabled
+# by setting APACHE_UNIPROC in the environment
+#
+XDCDATA		=
+
+#
+# If there is an NLM target, put it here
+#
+TARGET_nlm = \
+	$(OBJDIR)/modheartbeat.nlm \
+	$(EOLIST)
+
+#
+# If there is an LIB target, put it here
+#
+TARGET_lib = \
+	$(EOLIST)
+
+#
+# These are the OBJ files needed to create the NLM target above.
+# Paths must all use the '/' character
+#
+FILES_nlm_objs = \
+	$(OBJDIR)/mod_heartbeat.o \
+	$(EOLIST)
+
+#
+# These are the LIB files needed to create the NLM target above.
+# These will be added as a library command in the link.opt file.
+#
+FILES_nlm_libs = \
+	$(PRELUDE) \
+	$(EOLIST)
+
+#
+# These are the modules that the above NLM target depends on to load.
+# These will be added as a module command in the link.opt file.
+#
+FILES_nlm_modules = \
+	aprlib \
+	libc \
+	$(EOLIST)
+
+#
+# If the nlm has a msg file, put it's path here
+#
+FILE_nlm_msg =
+
+#
+# If the nlm has a hlp file put it's path here
+#
+FILE_nlm_hlp =
+
+#
+# If this is specified, it will override $(NWOS)\copyright.txt.
+#
+FILE_nlm_copyright =
+
+#
+# Any additional imports go here
+#
+FILES_nlm_Ximports = \
+	@aprlib.imp \
+	@httpd.imp \
+	@libc.imp \
+	$(EOLIST)
+
+#
+# Any symbols exported to here
+#
+FILES_nlm_exports = \
+	heartbeat_module \
+	$(EOLIST)
+
+#
+# These are the OBJ files needed to create the LIB target above.
+# Paths must all use the '/' character
+#
+FILES_lib_objs = \
+	$(EOLIST)
+
+#
+# implement targets and dependancies (leave this section alone)
+#
+
+libs :: $(OBJDIR) $(TARGET_lib)
+
+nlms :: libs $(TARGET_nlm)
+
+#
+# Updated this target to create necessary directories and copy files to the
+# correct place.  (See $(AP_WORK)/build/NWGNUhead.inc for examples)
+#
+install :: nlms FORCE
+
+#
+# Any specialized rules here
+#
+
+#
+# Include the 'tail' makefile that has targets that depend on variables defined
+# in this makefile
+#
+
+include $(APBUILD)/NWGNUtail.inc
+
+
diff --git a/modules/cluster/NWGNUmodheartmonitor b/modules/cluster/NWGNUmodheartmonitor
new file mode 100644
index 0000000..2436b27
--- /dev/null
+++ b/modules/cluster/NWGNUmodheartmonitor
@@ -0,0 +1,257 @@
+#
+# Declare the sub-directories to be built here
+#
+
+SUBDIRS = \
+	$(EOLIST)
+
+#
+# Get the 'head' of the build environment.  This includes default targets and
+# paths to tools
+#
+
+include $(AP_WORK)/build/NWGNUhead.inc
+
+#
+# build this level's files
+
+#
+# Make sure all needed macro's are defined
+#
+
+#
+# These directories will be at the beginning of the include list, followed by
+# INCDIRS
+#
+XINCDIRS	+= \
+			$(APR)/include \
+			$(APRUTIL)/include \
+			$(AP_WORK)/include \
+			$(AP_WORK)/modules/core \
+			$(NWOS) \
+			$(EOLIST)
+
+#
+# These flags will come after CFLAGS
+#
+XCFLAGS		+= \
+			$(EOLIST)
+
+#
+# These defines will come after DEFINES
+#
+XDEFINES	+= \
+			$(EOLIST)
+
+#
+# These flags will be added to the link.opt file
+#
+XLFLAGS		+= \
+			$(EOLIST)
+
+#
+# These values will be appended to the correct variables based on the value of
+# RELEASE
+#
+ifeq "$(RELEASE)" "debug"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+ifeq "$(RELEASE)" "noopt"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+ifeq "$(RELEASE)" "release"
+XINCDIRS	+= \
+			$(EOLIST)
+
+XCFLAGS		+= \
+			$(EOLIST)
+
+XDEFINES	+= \
+			$(EOLIST)
+
+XLFLAGS		+= \
+			$(EOLIST)
+endif
+
+#
+# These are used by the link target if an NLM is being generated
+# This is used by the link 'name' directive to name the nlm.  If left blank
+# TARGET_nlm (see below) will be used.
+#
+NLM_NAME	= modheartmonitor
+
+#
+# This is used by the link '-desc ' directive.
+# If left blank, NLM_NAME will be used.
+#
+NLM_DESCRIPTION	= Apache $(VERSION_STR) Heart Beat Monitor Module
+
+#
+# This is used by the '-threadname' directive.  If left blank,
+# NLM_NAME Thread will be used.
+#
+NLM_THREAD_NAME	= modheartmonitor
+
+#
+# If this is specified, it will override VERSION value in
+# $(AP_WORK)/build/NWGNUenvironment.inc
+#
+NLM_VERSION	=
+
+#
+# If this is specified, it will override the default of 64K
+#
+NLM_STACK_SIZE	= 8192
+
+
+#
+# If this is specified it will be used by the link '-entry' directive
+#
+NLM_ENTRY_SYM	=
+
+#
+# If this is specified it will be used by the link '-exit' directive
+#
+NLM_EXIT_SYM	=
+
+#
+# If this is specified it will be used by the link '-check' directive
+#
+NLM_CHECK_SYM	=
+
+#
+# If these are specified it will be used by the link '-flags' directive
+#
+NLM_FLAGS	=
+
+#
+# If this is specified it will be linked in with the XDCData option in the def
+# file instead of the default of $(NWOS)/apache.xdc.  XDCData can be disabled
+# by setting APACHE_UNIPROC in the environment
+#
+XDCDATA		=
+
+#
+# If there is an NLM target, put it here
+#
+TARGET_nlm = \
+	$(OBJDIR)/modheartmonitor.nlm \
+	$(EOLIST)
+
+#
+# If there is an LIB target, put it here
+#
+TARGET_lib = \
+	$(EOLIST)
+
+#
+# These are the OBJ files needed to create the NLM target above.
+# Paths must all use the '/' character
+#
+FILES_nlm_objs = \
+	$(OBJDIR)/mod_heartmonitor.o \
+	$(EOLIST)
+
+#
+# These are the LIB files needed to create the NLM target above.
+# These will be added as a library command in the link.opt file.
+#
+FILES_nlm_libs = \
+	$(PRELUDE) \
+	$(EOLIST)
+
+#
+# These are the modules that the above NLM target depends on to load.
+# These will be added as a module command in the link.opt file.
+#
+FILES_nlm_modules = \
+	aprlib \
+	libc \
+	$(EOLIST)
+
+#
+# If the nlm has a msg file, put it's path here
+#
+FILE_nlm_msg =
+
+#
+# If the nlm has a hlp file put it's path here
+#
+FILE_nlm_hlp =
+
+#
+# If this is specified, it will override $(NWOS)\copyright.txt.
+#
+FILE_nlm_copyright =
+
+#
+# Any additional imports go here
+#
+FILES_nlm_Ximports = \
+	@aprlib.imp \
+	@httpd.imp \
+	@libc.imp \
+	$(EOLIST)
+
+#
+# Any symbols exported to here
+#
+FILES_nlm_exports = \
+	heartmonitor_module \
+	$(EOLIST)
+
+#
+# These are the OBJ files needed to create the LIB target above.
+# Paths must all use the '/' character
+#
+FILES_lib_objs = \
+	$(EOLIST)
+
+#
+# implement targets and dependancies (leave this section alone)
+#
+
+libs :: $(OBJDIR) $(TARGET_lib)
+
+nlms :: libs $(TARGET_nlm)
+
+#
+# Updated this target to create necessary directories and copy files to the
+# correct place.  (See $(AP_WORK)/build/NWGNUhead.inc for examples)
+#
+install :: nlms FORCE
+
+#
+# Any specialized rules here
+#
+
+#
+# Include the 'tail' makefile that has targets that depend on variables defined
+# in this makefile
+#
+
+include $(APBUILD)/NWGNUtail.inc
+
+
diff --git a/modules/cluster/README.heartbeat b/modules/cluster/README.heartbeat
new file mode 100644
index 0000000..5eec549
--- /dev/null
+++ b/modules/cluster/README.heartbeat
@@ -0,0 +1,33 @@
+mod_heartbeat
+
+Broadcasts the current Apache Connection status over multicast.
+
+Example Configuration:
+  HeartbeatAddress 239.0.0.1:27999
+
+Dependencies:
+  mod_status must be either a static module, or if a dynamic module, it must be 
+  loaded before mod_heartbeat.
+
+
+Consuming:
+  Every 1 second, this module generates a single multicast UDP packet,
+  containing the number of busy and idle workers.
+  
+  The packet is a simple ASCII format, similar to GET query parameters in UDP.
+  
+  An Example packet:
+    v=1&ready=75&busy=0
+
+  Consumers should handle new variables besides busy and ready, separated by '&'
+  being added in the future.
+  
+Misc:
+  The interval of 1 seconds is controlled by the HEARTBEAT_INTERVAL
+  compile time define.  This is not currently tunable at run time. To make this
+  module send the status packet more often, you must add to the CFLAGS used to
+  compile the module to include:
+    -DHEARTBEAT_INTERVAL=3
+  Would cause the broadcasts to be sent every 3 seconds.
+
+
diff --git a/modules/cluster/README.heartmonitor b/modules/cluster/README.heartmonitor
new file mode 100644
index 0000000..0cb70bc
--- /dev/null
+++ b/modules/cluster/README.heartmonitor
@@ -0,0 +1,30 @@
+mod_heartmonitor
+
+Collects the Apache Connection status data over multicast.
+
+Example Configuration:
+  # First parameter is the interface to listen on
+  HeartbeatListen 239.0.0.1:27999
+  # Absolute path, or relative path to ServerRoot
+  HeartbeatStorage logs/hb.dat
+
+Dependencies:
+  Due to a bug in APR's apr_socket_recvfrom, version 1.2.12 or newer must be
+  used:
+    <http://svn.apache.org/viewvc?view=rev&revision=467600>
+
+Consuming:
+  This module atomically writes to the configured path, a list of servers, 
+  along with metadata about them.
+  
+  Included data about each server:
+    - IP Address
+    - Busy Slots
+    - Open Slots
+    - Last Seen
+
+  Every 5 seconds, this file will be updated with the current status of the 
+  cluster.
+
+  
+
diff --git a/modules/cluster/config5.m4 b/modules/cluster/config5.m4
new file mode 100644
index 0000000..8667316
--- /dev/null
+++ b/modules/cluster/config5.m4
@@ -0,0 +1,17 @@
+
+APACHE_MODPATH_INIT(cluster)
+
+heartbeat_objects='mod_heartbeat.lo'
+
+case "$host" in
+  *os2*)
+    # OS/2 DLLs must resolve all symbols at build time
+    # and we need some from the watchdog module
+    heartbeat_objects="$heartbeat_objects ../core/mod_watchdog.la"
+    ;;
+esac
+
+APACHE_MODULE(heartbeat, Generates Heartbeats, $heartbeat_objects, , , , watchdog)
+APACHE_MODULE(heartmonitor, Collects Heartbeats, , , )
+
+APACHE_MODPATH_FINISH
diff --git a/modules/cluster/mod_heartbeat.c b/modules/cluster/mod_heartbeat.c
new file mode 100644
index 0000000..1dc4a91
--- /dev/null
+++ b/modules/cluster/mod_heartbeat.c
@@ -0,0 +1,228 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "apr_strings.h"
+
+#include "ap_mpm.h"
+#include "scoreboard.h"
+#include "mod_watchdog.h"
+
+#ifndef HEARTBEAT_INTERVAL
+#define HEARTBEAT_INTERVAL (1)
+#endif
+
+module AP_MODULE_DECLARE_DATA heartbeat_module;
+
+typedef struct hb_ctx_t
+{
+    int active;
+    apr_sockaddr_t *mcast_addr;
+    int server_limit;
+    int thread_limit;
+    apr_status_t status;
+} hb_ctx_t;
+
+static const char *msg_format = "v=%u&ready=%u&busy=%u";
+
+#define MSG_VERSION (1)
+
+static int hb_monitor(hb_ctx_t *ctx, apr_pool_t *p)
+{
+    apr_size_t len;
+    apr_socket_t *sock = NULL;
+    char buf[256];
+    int i, j;
+    apr_uint32_t ready = 0;
+    apr_uint32_t busy = 0;
+    ap_generation_t mpm_generation;
+
+    ap_mpm_query(AP_MPMQ_GENERATION, &mpm_generation);
+
+    for (i = 0; i < ctx->server_limit; i++) {
+        process_score *ps;
+        ps = ap_get_scoreboard_process(i);
+
+        for (j = 0; j < ctx->thread_limit; j++) {
+            int res;
+
+            worker_score *ws = NULL;
+
+            ws = &ap_scoreboard_image->servers[i][j];
+
+            res = ws->status;
+
+            if (res == SERVER_READY && ps->generation == mpm_generation) {
+                ready++;
+            }
+            else if (res != SERVER_DEAD &&
+                     res != SERVER_STARTING && res != SERVER_IDLE_KILL &&
+                     ps->generation == mpm_generation) {
+                busy++;
+            }
+        }
+    }
+
+    len = apr_snprintf(buf, sizeof(buf), msg_format, MSG_VERSION, ready, busy);
+
+    do {
+        apr_status_t rv;
+        rv = apr_socket_create(&sock, ctx->mcast_addr->family,
+                               SOCK_DGRAM, APR_PROTO_UDP, p);
+        if (rv) {
+            ap_log_error(APLOG_MARK, APLOG_WARNING, rv,
+                         NULL, APLOGNO(02097) "Heartbeat: apr_socket_create failed");
+            break;
+        }
+
+        rv = apr_mcast_loopback(sock, 1);
+        if (rv) {
+            ap_log_error(APLOG_MARK, APLOG_WARNING, rv,
+                         NULL, APLOGNO(02098) "Heartbeat: apr_mcast_loopback failed");
+            break;
+        }
+
+        rv = apr_socket_sendto(sock, ctx->mcast_addr, 0, buf, &len);
+        if (rv) {
+            ap_log_error(APLOG_MARK, APLOG_WARNING, rv,
+                         NULL, APLOGNO(02099) "Heartbeat: apr_socket_sendto failed");
+            break;
+        }
+    } while (0);
+
+    if (sock) {
+        apr_socket_close(sock);
+    }
+
+    return OK;
+}
+
+static int hb_watchdog_init(server_rec *s, const char *name, apr_pool_t *pool)
+{
+    hb_ctx_t *ctx = ap_get_module_config(s->module_config, &heartbeat_module);
+
+    ap_mpm_query(AP_MPMQ_HARD_LIMIT_THREADS, &ctx->thread_limit);
+    ap_mpm_query(AP_MPMQ_HARD_LIMIT_DAEMONS, &ctx->server_limit);
+
+    return OK;
+}
+
+static int hb_watchdog_exit(server_rec *s, const char *name, apr_pool_t *pool)
+{
+    return OK;
+}
+
+static int hb_watchdog_step(server_rec *s, const char *name, apr_pool_t *pool)
+{
+    hb_ctx_t *ctx = ap_get_module_config(s->module_config, &heartbeat_module);
+
+    if (!ctx->active || strcmp(name, AP_WATCHDOG_SINGLETON)) {
+        return OK;
+    }
+    return hb_monitor(ctx, pool);
+}
+
+static int hb_watchdog_need(server_rec *s, const char *name,
+                          int parent, int singleton)
+{
+    hb_ctx_t *ctx = ap_get_module_config(s->module_config, &heartbeat_module);
+
+    if (ctx->active && singleton && !strcmp(name, AP_WATCHDOG_SINGLETON))
+        return OK;
+    else
+        return DECLINED;
+}
+
+static void hb_register_hooks(apr_pool_t *p)
+{
+    ap_hook_watchdog_need(hb_watchdog_need, NULL, NULL, APR_HOOK_MIDDLE);
+    ap_hook_watchdog_init(hb_watchdog_init, NULL, NULL, APR_HOOK_MIDDLE);
+    ap_hook_watchdog_step(hb_watchdog_step, NULL, NULL, APR_HOOK_MIDDLE);
+    ap_hook_watchdog_exit(hb_watchdog_exit, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+static void *hb_create_config(apr_pool_t *p, server_rec *s)
+{
+    hb_ctx_t *cfg = (hb_ctx_t *) apr_pcalloc(p, sizeof(hb_ctx_t));
+
+    return cfg;
+}
+
+static const char *cmd_hb_address(cmd_parms *cmd,
+                                  void *dconf, const char *addr)
+{
+    apr_status_t rv;
+    char *host_str;
+    char *scope_id;
+    apr_port_t port = 0;
+    apr_pool_t *p = cmd->pool;
+    hb_ctx_t *ctx =
+        (hb_ctx_t *) ap_get_module_config(cmd->server->module_config,
+                                          &heartbeat_module);
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (!ctx->active) {
+        ctx->active = 1;
+    }
+    else {
+        return "HeartbeatAddress: May only be specified once.";
+    }
+
+    rv = apr_parse_addr_port(&host_str, &scope_id, &port, addr, cmd->temp_pool);
+
+    if (rv) {
+        return "HeartbeatAddress: Unable to parse address.";
+    }
+
+    if (host_str == NULL) {
+        return "HeartbeatAddress: No host provided in address";
+    }
+
+    if (port == 0) {
+        return "HeartbeatAddress: No port provided in address";
+    }
+
+    rv = apr_sockaddr_info_get(&ctx->mcast_addr, host_str, APR_INET, port, 0,
+                               p);
+
+    if (rv) {
+        return "HeartbeatAddress: apr_sockaddr_info_get failed.";
+    }
+
+    return NULL;
+}
+
+static const command_rec hb_cmds[] = {
+    AP_INIT_TAKE1("HeartbeatAddress", cmd_hb_address, NULL, RSRC_CONF,
+                  "Address to send heartbeat requests"),
+    {NULL}
+};
+
+AP_DECLARE_MODULE(heartbeat) = {
+    STANDARD20_MODULE_STUFF,
+    NULL,                       /* create per-directory config structure */
+    NULL,                       /* merge per-directory config structures */
+    hb_create_config,           /* create per-server config structure */
+    NULL,                       /* merge per-server config structures */
+    hb_cmds,                    /* command apr_table_t */
+    hb_register_hooks
+};
diff --git a/modules/cluster/mod_heartbeat.dep b/modules/cluster/mod_heartbeat.dep
new file mode 100644
index 0000000..d95401f
--- /dev/null
+++ b/modules/cluster/mod_heartbeat.dep
@@ -0,0 +1,55 @@
+# Microsoft Developer Studio Generated Dependency File, included by mod_heartbeat.mak
+
+.\mod_heartbeat.c : \
+	"..\..\include\ap_config.h"\
+	"..\..\include\ap_config_layout.h"\
+	"..\..\include\ap_hooks.h"\
+	"..\..\include\ap_mmn.h"\
+	"..\..\include\ap_mpm.h"\
+	"..\..\include\ap_provider.h"\
+	"..\..\include\ap_regex.h"\
+	"..\..\include\ap_release.h"\
+	"..\..\include\apache_noprobes.h"\
+	"..\..\include\http_config.h"\
+	"..\..\include\http_log.h"\
+	"..\..\include\httpd.h"\
+	"..\..\include\os.h"\
+	"..\..\include\scoreboard.h"\
+	"..\..\include\util_cfgtree.h"\
+	"..\..\srclib\apr-util\include\apr_buckets.h"\
+	"..\..\srclib\apr-util\include\apr_hooks.h"\
+	"..\..\srclib\apr-util\include\apr_optional.h"\
+	"..\..\srclib\apr-util\include\apr_optional_hooks.h"\
+	"..\..\srclib\apr-util\include\apr_uri.h"\
+	"..\..\srclib\apr-util\include\apu.h"\
+	"..\..\srclib\apr\include\apr.h"\
+	"..\..\srclib\apr\include\apr_allocator.h"\
+	"..\..\srclib\apr\include\apr_dso.h"\
+	"..\..\srclib\apr\include\apr_errno.h"\
+	"..\..\srclib\apr\include\apr_file_info.h"\
+	"..\..\srclib\apr\include\apr_file_io.h"\
+	"..\..\srclib\apr\include\apr_general.h"\
+	"..\..\srclib\apr\include\apr_global_mutex.h"\
+	"..\..\srclib\apr\include\apr_hash.h"\
+	"..\..\srclib\apr\include\apr_inherit.h"\
+	"..\..\srclib\apr\include\apr_mmap.h"\
+	"..\..\srclib\apr\include\apr_network_io.h"\
+	"..\..\srclib\apr\include\apr_poll.h"\
+	"..\..\srclib\apr\include\apr_pools.h"\
+	"..\..\srclib\apr\include\apr_portable.h"\
+	"..\..\srclib\apr\include\apr_proc_mutex.h"\
+	"..\..\srclib\apr\include\apr_ring.h"\
+	"..\..\srclib\apr\include\apr_shm.h"\
+	"..\..\srclib\apr\include\apr_strings.h"\
+	"..\..\srclib\apr\include\apr_tables.h"\
+	"..\..\srclib\apr\include\apr_thread_mutex.h"\
+	"..\..\srclib\apr\include\apr_thread_proc.h"\
+	"..\..\srclib\apr\include\apr_time.h"\
+	"..\..\srclib\apr\include\apr_user.h"\
+	"..\..\srclib\apr\include\apr_want.h"\
+	"..\core\mod_watchdog.h"\
+	
+
+..\..\build\win32\httpd.rc : \
+	"..\..\include\ap_release.h"\
+	
diff --git a/modules/cluster/mod_heartbeat.dsp b/modules/cluster/mod_heartbeat.dsp
new file mode 100644
index 0000000..a2014dc
--- /dev/null
+++ b/modules/cluster/mod_heartbeat.dsp
@@ -0,0 +1,123 @@
+# Microsoft Developer Studio Project File - Name="mod_heartbeat" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102
+
+CFG=mod_heartbeat - Win32 Release
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_heartbeat.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_heartbeat.mak" CFG="mod_heartbeat - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "mod_heartbeat - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "mod_heartbeat - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+CPP=cl.exe
+MTL=midl.exe
+RSC=rc.exe
+
+!IF  "$(CFG)" == "mod_heartbeat - Win32 Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "Release"
+# PROP BASE Intermediate_Dir "Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Release"
+# PROP Intermediate_Dir "Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /FD /c
+# ADD CPP /nologo /MD /W3 /O2 /Oy- /Zi /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /Fd"Release\mod_heartbeat_src" /FD /c
+# ADD BASE MTL /nologo /D "NDEBUG" /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x809 /d "NDEBUG"
+# ADD RSC /l 0x409 /fo"Release/mod_heartbeat.res" /i "../../include" /i "../../srclib/apr/include" /d "NDEBUG" /d BIN_NAME="mod_heartbeat.so" /d LONG_NAME="heartbeat_module for Apache"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /out:".\Release\mod_heartbeat.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartbeat.so
+# ADD LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Release\mod_heartbeat.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartbeat.so /opt:ref
+# Begin Special Build Tool
+TargetPath=.\Release\mod_heartbeat.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+PostBuild_Cmds=if exist $(TargetPath).manifest mt.exe -manifest $(TargetPath).manifest -outputresource:$(TargetPath);2
+# End Special Build Tool
+
+!ELSEIF  "$(CFG)" == "mod_heartbeat - Win32 Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "Debug"
+# PROP BASE Intermediate_Dir "Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Debug"
+# PROP Intermediate_Dir "Debug"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MDd /W3 /EHsc /Zi /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /FD /c
+# ADD CPP /nologo /MDd /W3 /EHsc /Zi /Od /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /Fd"Debug\mod_heartbeat_src" /FD /c
+# ADD BASE MTL /nologo /D "_DEBUG" /win32
+# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x809 /d "_DEBUG"
+# ADD RSC /l 0x409 /fo"Debug/mod_heartbeat.res" /i "../../include" /i "../../srclib/apr/include" /d "_DEBUG" /d BIN_NAME="mod_heartbeat.so" /d LONG_NAME="heartbeat_module for Apache"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Debug\mod_heartbeat.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartbeat.so
+# ADD LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Debug\mod_heartbeat.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartbeat.so
+# Begin Special Build Tool
+TargetPath=.\Debug\mod_heartbeat.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+PostBuild_Cmds=if exist $(TargetPath).manifest mt.exe -manifest $(TargetPath).manifest -outputresource:$(TargetPath);2
+# End Special Build Tool
+
+!ENDIF 
+
+# Begin Target
+
+# Name "mod_heartbeat - Win32 Release"
+# Name "mod_heartbeat - Win32 Debug"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;hpj;bat;for;f90"
+# Begin Source File
+
+SOURCE=.\mod_heartbeat.c
+# End Source File
+# End Group
+# Begin Group "Header Files"
+
+# PROP Default_Filter ".h"
+# Begin Source File
+
+SOURCE=.\mod_proxy.h
+# End Source File
+# End Group
+# Begin Source File
+
+SOURCE=..\..\build\win32\httpd.rc
+# End Source File
+# End Target
+# End Project
diff --git a/modules/cluster/mod_heartbeat.mak b/modules/cluster/mod_heartbeat.mak
new file mode 100644
index 0000000..7ce22c7
--- /dev/null
+++ b/modules/cluster/mod_heartbeat.mak
@@ -0,0 +1,380 @@
+# Microsoft Developer Studio Generated NMAKE File, Based on mod_heartbeat.dsp
+!IF "$(CFG)" == ""
+CFG=mod_heartbeat - Win32 Release
+!MESSAGE No configuration specified. Defaulting to mod_heartbeat - Win32 Release.
+!ENDIF 
+
+!IF "$(CFG)" != "mod_heartbeat - Win32 Release" && "$(CFG)" != "mod_heartbeat - Win32 Debug"
+!MESSAGE Invalid configuration "$(CFG)" specified.
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_heartbeat.mak" CFG="mod_heartbeat - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "mod_heartbeat - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "mod_heartbeat - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+!ERROR An invalid configuration is specified.
+!ENDIF 
+
+!IF "$(OS)" == "Windows_NT"
+NULL=
+!ELSE 
+NULL=nul
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartbeat - Win32 Release"
+
+OUTDIR=.\Release
+INTDIR=.\Release
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+# Begin Custom Macros
+OutDir=.\Release
+# End Custom Macros
+
+!IF "$(RECURSE)" == "0" 
+
+ALL : "$(OUTDIR)\mod_heartbeat.so" "$(DS_POSTBUILD_DEP)"
+
+!ELSE 
+
+ALL : "mod_watchdog - Win32 Release" "libhttpd - Win32 Release" "libaprutil - Win32 Release" "libapr - Win32 Release" "$(OUTDIR)\mod_heartbeat.so" "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+!IF "$(RECURSE)" == "1" 
+CLEAN :"libapr - Win32 ReleaseCLEAN" "libaprutil - Win32 ReleaseCLEAN" "libhttpd - Win32 ReleaseCLEAN" "mod_watchdog - Win32 ReleaseCLEAN" 
+!ELSE 
+CLEAN :
+!ENDIF 
+	-@erase "$(INTDIR)\mod_heartbeat.obj"
+	-@erase "$(INTDIR)\mod_heartbeat.res"
+	-@erase "$(INTDIR)\mod_heartbeat_src.idb"
+	-@erase "$(INTDIR)\mod_heartbeat_src.pdb"
+	-@erase "$(OUTDIR)\mod_heartbeat.exp"
+	-@erase "$(OUTDIR)\mod_heartbeat.lib"
+	-@erase "$(OUTDIR)\mod_heartbeat.pdb"
+	-@erase "$(OUTDIR)\mod_heartbeat.so"
+
+"$(OUTDIR)" :
+    if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
+
+CPP=cl.exe
+CPP_PROJ=/nologo /MD /W3 /Zi /O2 /Oy- /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\mod_heartbeat_src" /FD /c 
+
+.c{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.c{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+MTL=midl.exe
+MTL_PROJ=/nologo /D "NDEBUG" /mktyplib203 /win32 
+RSC=rc.exe
+RSC_PROJ=/l 0x409 /fo"$(INTDIR)\mod_heartbeat.res" /i "../../include" /i "../../srclib/apr/include" /d "NDEBUG" /d BIN_NAME="mod_heartbeat.so" /d LONG_NAME="heartbeat_module for Apache" 
+BSC32=bscmake.exe
+BSC32_FLAGS=/nologo /o"$(OUTDIR)\mod_heartbeat.bsc" 
+BSC32_SBRS= \
+	
+LINK32=link.exe
+LINK32_FLAGS=kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /pdb:"$(OUTDIR)\mod_heartbeat.pdb" /debug /out:"$(OUTDIR)\mod_heartbeat.so" /implib:"$(OUTDIR)\mod_heartbeat.lib" /base:@..\..\os\win32\BaseAddr.ref,mod_heartbeat.so /opt:ref 
+LINK32_OBJS= \
+	"$(INTDIR)\mod_heartbeat.obj" \
+	"$(INTDIR)\mod_heartbeat.res" \
+	"..\..\srclib\apr\Release\libapr-1.lib" \
+	"..\..\srclib\apr-util\Release\libaprutil-1.lib" \
+	"..\..\Release\libhttpd.lib" \
+	"..\core\Release\mod_watchdog.lib"
+
+"$(OUTDIR)\mod_heartbeat.so" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
+    $(LINK32) @<<
+  $(LINK32_FLAGS) $(LINK32_OBJS)
+<<
+
+TargetPath=.\Release\mod_heartbeat.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+
+# Begin Custom Macros
+OutDir=.\Release
+# End Custom Macros
+
+"$(DS_POSTBUILD_DEP)" : "$(OUTDIR)\mod_heartbeat.so"
+   if exist .\Release\mod_heartbeat.so.manifest mt.exe -manifest .\Release\mod_heartbeat.so.manifest -outputresource:.\Release\mod_heartbeat.so;2
+	echo Helper for Post-build step > "$(DS_POSTBUILD_DEP)"
+
+!ELSEIF  "$(CFG)" == "mod_heartbeat - Win32 Debug"
+
+OUTDIR=.\Debug
+INTDIR=.\Debug
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+# Begin Custom Macros
+OutDir=.\Debug
+# End Custom Macros
+
+!IF "$(RECURSE)" == "0" 
+
+ALL : "$(OUTDIR)\mod_heartbeat.so" "$(DS_POSTBUILD_DEP)"
+
+!ELSE 
+
+ALL : "mod_watchdog - Win32 Debug" "libhttpd - Win32 Debug" "libaprutil - Win32 Debug" "libapr - Win32 Debug" "$(OUTDIR)\mod_heartbeat.so" "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+!IF "$(RECURSE)" == "1" 
+CLEAN :"libapr - Win32 DebugCLEAN" "libaprutil - Win32 DebugCLEAN" "libhttpd - Win32 DebugCLEAN" "mod_watchdog - Win32 DebugCLEAN" 
+!ELSE 
+CLEAN :
+!ENDIF 
+	-@erase "$(INTDIR)\mod_heartbeat.obj"
+	-@erase "$(INTDIR)\mod_heartbeat.res"
+	-@erase "$(INTDIR)\mod_heartbeat_src.idb"
+	-@erase "$(INTDIR)\mod_heartbeat_src.pdb"
+	-@erase "$(OUTDIR)\mod_heartbeat.exp"
+	-@erase "$(OUTDIR)\mod_heartbeat.lib"
+	-@erase "$(OUTDIR)\mod_heartbeat.pdb"
+	-@erase "$(OUTDIR)\mod_heartbeat.so"
+
+"$(OUTDIR)" :
+    if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
+
+CPP=cl.exe
+CPP_PROJ=/nologo /MDd /W3 /Zi /Od /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\mod_heartbeat_src" /FD /EHsc /c 
+
+.c{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.c{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+MTL=midl.exe
+MTL_PROJ=/nologo /D "_DEBUG" /mktyplib203 /win32 
+RSC=rc.exe
+RSC_PROJ=/l 0x409 /fo"$(INTDIR)\mod_heartbeat.res" /i "../../include" /i "../../srclib/apr/include" /d "_DEBUG" /d BIN_NAME="mod_heartbeat.so" /d LONG_NAME="heartbeat_module for Apache" 
+BSC32=bscmake.exe
+BSC32_FLAGS=/nologo /o"$(OUTDIR)\mod_heartbeat.bsc" 
+BSC32_SBRS= \
+	
+LINK32=link.exe
+LINK32_FLAGS=kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /pdb:"$(OUTDIR)\mod_heartbeat.pdb" /debug /out:"$(OUTDIR)\mod_heartbeat.so" /implib:"$(OUTDIR)\mod_heartbeat.lib" /base:@..\..\os\win32\BaseAddr.ref,mod_heartbeat.so 
+LINK32_OBJS= \
+	"$(INTDIR)\mod_heartbeat.obj" \
+	"$(INTDIR)\mod_heartbeat.res" \
+	"..\..\srclib\apr\Debug\libapr-1.lib" \
+	"..\..\srclib\apr-util\Debug\libaprutil-1.lib" \
+	"..\..\Debug\libhttpd.lib" \
+	"..\core\Debug\mod_watchdog.lib"
+
+"$(OUTDIR)\mod_heartbeat.so" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
+    $(LINK32) @<<
+  $(LINK32_FLAGS) $(LINK32_OBJS)
+<<
+
+TargetPath=.\Debug\mod_heartbeat.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+
+# Begin Custom Macros
+OutDir=.\Debug
+# End Custom Macros
+
+"$(DS_POSTBUILD_DEP)" : "$(OUTDIR)\mod_heartbeat.so"
+   if exist .\Debug\mod_heartbeat.so.manifest mt.exe -manifest .\Debug\mod_heartbeat.so.manifest -outputresource:.\Debug\mod_heartbeat.so;2
+	echo Helper for Post-build step > "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+
+!IF "$(NO_EXTERNAL_DEPS)" != "1"
+!IF EXISTS("mod_heartbeat.dep")
+!INCLUDE "mod_heartbeat.dep"
+!ELSE 
+!MESSAGE Warning: cannot find "mod_heartbeat.dep"
+!ENDIF 
+!ENDIF 
+
+
+!IF "$(CFG)" == "mod_heartbeat - Win32 Release" || "$(CFG)" == "mod_heartbeat - Win32 Debug"
+SOURCE=.\mod_heartbeat.c
+
+"$(INTDIR)\mod_heartbeat.obj" : $(SOURCE) "$(INTDIR)"
+
+
+!IF  "$(CFG)" == "mod_heartbeat - Win32 Release"
+
+"libapr - Win32 Release" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Release" 
+   cd "..\..\modules\cluster"
+
+"libapr - Win32 ReleaseCLEAN" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartbeat - Win32 Debug"
+
+"libapr - Win32 Debug" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Debug" 
+   cd "..\..\modules\cluster"
+
+"libapr - Win32 DebugCLEAN" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartbeat - Win32 Release"
+
+"libaprutil - Win32 Release" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Release" 
+   cd "..\..\modules\cluster"
+
+"libaprutil - Win32 ReleaseCLEAN" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartbeat - Win32 Debug"
+
+"libaprutil - Win32 Debug" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Debug" 
+   cd "..\..\modules\cluster"
+
+"libaprutil - Win32 DebugCLEAN" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartbeat - Win32 Release"
+
+"libhttpd - Win32 Release" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Release" 
+   cd ".\modules\cluster"
+
+"libhttpd - Win32 ReleaseCLEAN" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Release" RECURSE=1 CLEAN 
+   cd ".\modules\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartbeat - Win32 Debug"
+
+"libhttpd - Win32 Debug" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Debug" 
+   cd ".\modules\cluster"
+
+"libhttpd - Win32 DebugCLEAN" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Debug" RECURSE=1 CLEAN 
+   cd ".\modules\cluster"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartbeat - Win32 Release"
+
+"mod_watchdog - Win32 Release" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Release" 
+   cd "..\cluster"
+
+"mod_watchdog - Win32 ReleaseCLEAN" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartbeat - Win32 Debug"
+
+"mod_watchdog - Win32 Debug" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Debug" 
+   cd "..\cluster"
+
+"mod_watchdog - Win32 DebugCLEAN" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\cluster"
+
+!ENDIF 
+
+SOURCE=..\..\build\win32\httpd.rc
+
+!IF  "$(CFG)" == "mod_heartbeat - Win32 Release"
+
+
+"$(INTDIR)\mod_heartbeat.res" : $(SOURCE) "$(INTDIR)"
+	$(RSC) /l 0x409 /fo"$(INTDIR)\mod_heartbeat.res" /i "../../include" /i "../../srclib/apr/include" /i "../../build\win32" /d "NDEBUG" /d BIN_NAME="mod_heartbeat.so" /d LONG_NAME="heartbeat_module for Apache" $(SOURCE)
+
+
+!ELSEIF  "$(CFG)" == "mod_heartbeat - Win32 Debug"
+
+
+"$(INTDIR)\mod_heartbeat.res" : $(SOURCE) "$(INTDIR)"
+	$(RSC) /l 0x409 /fo"$(INTDIR)\mod_heartbeat.res" /i "../../include" /i "../../srclib/apr/include" /i "../../build\win32" /d "_DEBUG" /d BIN_NAME="mod_heartbeat.so" /d LONG_NAME="heartbeat_module for Apache" $(SOURCE)
+
+
+!ENDIF 
+
+
+!ENDIF 
+
diff --git a/modules/cluster/mod_heartmonitor.c b/modules/cluster/mod_heartmonitor.c
new file mode 100644
index 0000000..965fef5
--- /dev/null
+++ b/modules/cluster/mod_heartmonitor.c
@@ -0,0 +1,918 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "http_core.h"
+#include "http_protocol.h"
+#include "apr_strings.h"
+#include "apr_hash.h"
+#include "apr_time.h"
+#include "ap_mpm.h"
+#include "scoreboard.h"
+#include "mod_watchdog.h"
+#include "ap_slotmem.h"
+#include "heartbeat.h"
+
+
+#ifndef HM_UPDATE_SEC
+/* How often we update the stats file */
+/* TODO: Make a runtime config */
+#define HM_UPDATE_SEC (5)
+#endif
+
+#define HM_WATHCHDOG_NAME ("_heartmonitor_")
+
+static const ap_slotmem_provider_t *storage = NULL;
+static ap_slotmem_instance_t *slotmem = NULL;
+static int maxworkers = 0;
+
+module AP_MODULE_DECLARE_DATA heartmonitor_module;
+
+typedef struct hm_server_t
+{
+    const char *ip;
+    int busy;
+    int ready;
+    unsigned int port;
+    apr_time_t seen;
+} hm_server_t;
+
+typedef struct hm_ctx_t
+{
+    int active;
+    const char *storage_path;
+    ap_watchdog_t *watchdog;
+    apr_interval_time_t interval;
+    apr_sockaddr_t *mcast_addr;
+    apr_status_t status;
+    volatile int keep_running;
+    apr_socket_t *sock;
+    apr_pool_t *p;
+    apr_hash_t *servers;
+    server_rec *s;
+} hm_ctx_t;
+
+typedef struct hm_slot_server_ctx_t {
+  hm_server_t *s;
+  int found;
+  unsigned int item_id;
+} hm_slot_server_ctx_t;
+
+static apr_status_t hm_listen(hm_ctx_t *ctx)
+{
+    apr_status_t rv;
+
+    rv = apr_socket_create(&ctx->sock, ctx->mcast_addr->family,
+                           SOCK_DGRAM, APR_PROTO_UDP, ctx->p);
+
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02068)
+                     "Failed to create listening socket.");
+        return rv;
+    }
+
+    rv = apr_socket_opt_set(ctx->sock, APR_SO_REUSEADDR, 1);
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02069)
+                     "Failed to set APR_SO_REUSEADDR to 1 on socket.");
+        return rv;
+    }
+
+
+    rv = apr_socket_opt_set(ctx->sock, APR_SO_NONBLOCK, 1);
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02070)
+                     "Failed to set APR_SO_NONBLOCK to 1 on socket.");
+        return rv;
+    }
+
+    rv = apr_socket_bind(ctx->sock, ctx->mcast_addr);
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02071)
+                     "Failed to bind on socket.");
+        return rv;
+    }
+
+    rv = apr_mcast_join(ctx->sock, ctx->mcast_addr, NULL, NULL);
+
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02072)
+                     "Failed to join multicast group");
+        return rv;
+    }
+
+    rv = apr_mcast_loopback(ctx->sock, 1);
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02073)
+                     "Failed to accept localhost mulitcast on socket.");
+        return rv;
+    }
+
+    return APR_SUCCESS;
+}
+
+/* XXX: The same exists in mod_lbmethod_heartbeat.c where it is named argstr_to_table */
+static void qs_to_table(const char *input, apr_table_t *parms,
+                        apr_pool_t *p)
+{
+    char *key;
+    char *value;
+    char *query_string;
+    char *strtok_state;
+
+    if (input == NULL) {
+        return;
+    }
+
+    query_string = apr_pstrdup(p, input);
+
+    key = apr_strtok(query_string, "&", &strtok_state);
+    while (key) {
+        value = strchr(key, '=');
+        if (value) {
+            *value = '\0';      /* Split the string in two */
+            value++;            /* Skip passed the = */
+        }
+        else {
+            value = "1";
+        }
+        ap_unescape_url(key);
+        ap_unescape_url(value);
+        apr_table_set(parms, key, value);
+        /*
+           ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03182)
+           "Found query arg: %s = %s", key, value);
+         */
+        key = apr_strtok(NULL, "&", &strtok_state);
+    }
+}
+
+
+#define SEEN_TIMEOUT (30)
+
+/* Store in the slotmem */
+static apr_status_t hm_update(void* mem, void *data, apr_pool_t *p)
+{
+    hm_slot_server_t *old = (hm_slot_server_t *) mem;
+    hm_slot_server_ctx_t *s = (hm_slot_server_ctx_t *) data;
+    hm_server_t *new = s->s;
+    if (strncmp(old->ip, new->ip, MAXIPSIZE)==0) {
+        s->found = 1;
+        old->busy = new->busy;
+        old->ready = new->ready;
+        old->seen = new->seen;
+    }
+    return APR_SUCCESS;
+}
+/* Read the id corresponding to the entry in the slotmem */
+static apr_status_t hm_readid(void* mem, void *data, apr_pool_t *p)
+{
+    hm_slot_server_t *old = (hm_slot_server_t *) mem;
+    hm_slot_server_ctx_t *s = (hm_slot_server_ctx_t *) data;
+    hm_server_t *new = s->s;
+    if (strncmp(old->ip, new->ip, MAXIPSIZE)==0) {
+        s->found = 1;
+        s->item_id = old->id;
+    }
+    return APR_SUCCESS;
+}
+/* update the entry or create it if not existing */
+static  apr_status_t  hm_slotmem_update_stat(hm_server_t *s, apr_pool_t *pool)
+{
+    /* We call do_all (to try to update) otherwise grab + put */
+    hm_slot_server_ctx_t ctx;
+    ctx.s = s;
+    ctx.found = 0;
+    storage->doall(slotmem, hm_update, &ctx, pool);
+    if (!ctx.found) {
+        unsigned int i;
+        hm_slot_server_t hmserver;
+        memcpy(hmserver.ip, s->ip, MAXIPSIZE);
+        hmserver.busy = s->busy;
+        hmserver.ready = s->ready;
+        hmserver.seen = s->seen;
+        /* XXX locking for grab() / put() */
+        storage->grab(slotmem, &i);
+        hmserver.id = i;
+        storage->put(slotmem, i, (unsigned char *)&hmserver, sizeof(hmserver));
+    }
+    return APR_SUCCESS;
+}
+static  apr_status_t  hm_slotmem_remove_stat(hm_server_t *s, apr_pool_t *pool)
+{
+    hm_slot_server_ctx_t ctx;
+    ctx.s = s;
+    ctx.found = 0;
+    storage->doall(slotmem, hm_readid, &ctx, pool);
+    if (ctx.found) {
+        storage->release(slotmem, ctx.item_id);
+    }
+    return APR_SUCCESS;
+}
+static apr_status_t hm_file_update_stat(hm_ctx_t *ctx, hm_server_t *s, apr_pool_t *pool)
+{
+    apr_status_t rv;
+    apr_file_t *fp;
+    apr_file_t *fpin;
+    apr_time_t now;
+    apr_time_t fage;
+    apr_finfo_t fi;
+    int updated = 0;
+    char *path = apr_pstrcat(pool, ctx->storage_path, ".tmp.XXXXXX", NULL);
+
+
+    /* TODO: Update stats file (!) */
+    rv = apr_file_mktemp(&fp, path, APR_CREATE | APR_WRITE, pool);
+
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02074)
+                     "Unable to open tmp file: %s", path);
+        return rv;
+    }
+    rv = apr_file_open(&fpin, ctx->storage_path, APR_READ|APR_BINARY|APR_BUFFERED,
+                       APR_OS_DEFAULT, pool);
+
+    now = apr_time_now();
+    if (rv == APR_SUCCESS) {
+        char *t;
+        apr_table_t *hbt = apr_table_make(pool, 10);
+        apr_bucket_alloc_t *ba;
+        apr_bucket_brigade *bb;
+        apr_bucket_brigade *tmpbb;
+
+        rv = apr_file_info_get(&fi, APR_FINFO_SIZE | APR_FINFO_MTIME, fpin);
+        if (rv) {
+            ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02075)
+                         "Unable to read file: %s", ctx->storage_path);
+            return rv;
+        }
+
+        /* Read the file and update the line corresponding to the node */
+        ba = apr_bucket_alloc_create(pool);
+        bb = apr_brigade_create(pool, ba);
+        apr_brigade_insert_file(bb, fpin, 0, fi.size, pool);
+        tmpbb = apr_brigade_create(pool, ba);
+        fage = apr_time_sec(now - fi.mtime);
+        do {
+            char buf[4096];
+            const char *ip;
+            apr_size_t bsize = sizeof(buf);
+
+            apr_brigade_cleanup(tmpbb);
+            if (APR_BRIGADE_EMPTY(bb)) {
+                break;
+            }
+            rv = apr_brigade_split_line(tmpbb, bb,
+                                        APR_BLOCK_READ, sizeof(buf));
+
+            if (rv) {
+                ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02076)
+                             "Unable to read from file: %s", ctx->storage_path);
+                return rv;
+            }
+
+            apr_brigade_flatten(tmpbb, buf, &bsize);
+            if (bsize == 0) {
+                break;
+            }
+            buf[bsize - 1] = 0;
+            t = strchr(buf, ' ');
+            if (t) {
+                ip = apr_pstrmemdup(pool, buf, t - buf);
+            }
+            else {
+                ip = NULL;
+            }
+
+            if (!ip || buf[0] == '#') {
+                /* copy things we can't process */
+                apr_file_printf(fp, "%s\n", buf);
+            }
+            else if (strcmp(ip, s->ip) != 0 ) {
+                hm_server_t node;
+                apr_time_t seen;
+                const char *val;
+
+                /* Update seen time according to the last file modification */
+                apr_table_clear(hbt);
+                qs_to_table(apr_pstrdup(pool, t), hbt, pool);
+                if ((val = apr_table_get(hbt, "busy"))) {
+                    node.busy = atoi(val);
+                }
+                else {
+                    node.busy = 0;
+                }
+
+                if ((val = apr_table_get(hbt, "ready"))) {
+                    node.ready = atoi(val);
+                }
+                else {
+                    node.ready = 0;
+                }
+
+                if ((val = apr_table_get(hbt, "lastseen"))) {
+                    node.seen = atoi(val);
+                }
+                else {
+                    node.seen = SEEN_TIMEOUT;
+                }
+                seen = fage + node.seen;
+
+                if ((val = apr_table_get(hbt, "port"))) {
+                    node.port = atoi(val);
+                }
+                else {
+                    node.port = 80;
+                }
+                apr_file_printf(fp, "%s &ready=%u&busy=%u&lastseen=%u&port=%u\n",
+                                ip, node.ready, node.busy, (unsigned int) seen, node.port);
+            }
+            else {
+                apr_time_t seen;
+                seen = apr_time_sec(now - s->seen);
+                apr_file_printf(fp, "%s &ready=%u&busy=%u&lastseen=%u&port=%u\n",
+                                s->ip, s->ready, s->busy, (unsigned int) seen, s->port);
+                updated = 1;
+            }
+        } while (1);
+    }
+
+    if (!updated) {
+        apr_time_t seen;
+        seen = apr_time_sec(now - s->seen);
+        apr_file_printf(fp, "%s &ready=%u&busy=%u&lastseen=%u&port=%u\n",
+                        s->ip, s->ready, s->busy, (unsigned int) seen, s->port);
+    }
+
+    rv = apr_file_flush(fp);
+    if (rv) {
+      ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02077)
+                   "Unable to flush file: %s", path);
+      return rv;
+    }
+
+    rv = apr_file_close(fp);
+    if (rv) {
+      ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02078)
+                   "Unable to close file: %s", path);
+      return rv;
+    }
+
+    rv = apr_file_perms_set(path,
+                            APR_FPROT_UREAD | APR_FPROT_GREAD |
+                            APR_FPROT_WREAD);
+    if (rv && rv != APR_INCOMPLETE && rv != APR_ENOTIMPL) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02079)
+                     "Unable to set file permissions on %s",
+                     path);
+        return rv;
+    }
+
+    rv = apr_file_rename(path, ctx->storage_path, pool);
+
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02080)
+                     "Unable to move file: %s -> %s", path,
+                     ctx->storage_path);
+        return rv;
+    }
+
+    return APR_SUCCESS;
+}
+static  apr_status_t  hm_update_stat(hm_ctx_t *ctx, hm_server_t *s, apr_pool_t *pool)
+{
+    if (slotmem)
+        return hm_slotmem_update_stat(s, pool);
+    else
+        return hm_file_update_stat(ctx, s, pool);
+}
+
+/* Store in a file */
+static apr_status_t hm_file_update_stats(hm_ctx_t *ctx, apr_pool_t *p)
+{
+    apr_status_t rv;
+    apr_file_t *fp;
+    apr_hash_index_t *hi;
+    apr_time_t now;
+    char *path = apr_pstrcat(p, ctx->storage_path, ".tmp.XXXXXX", NULL);
+    /* TODO: Update stats file (!) */
+    rv = apr_file_mktemp(&fp, path, APR_CREATE | APR_WRITE, p);
+
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02081)
+                     "Unable to open tmp file: %s", path);
+        return rv;
+    }
+
+    now = apr_time_now();
+    for (hi = apr_hash_first(p, ctx->servers);
+         hi != NULL; hi = apr_hash_next(hi)) {
+        hm_server_t *s = NULL;
+        apr_time_t seen;
+        apr_hash_this(hi, NULL, NULL, (void **) &s);
+        seen = apr_time_sec(now - s->seen);
+        if (seen > SEEN_TIMEOUT) {
+            /*
+             * Skip this entry from the heartbeat file -- when it comes back,
+             * we will reuse the memory...
+             */
+        }
+        else {
+            apr_file_printf(fp, "%s &ready=%u&busy=%u&lastseen=%u&port=%u\n",
+                            s->ip, s->ready, s->busy, (unsigned int) seen, s->port);
+        }
+    }
+
+    rv = apr_file_flush(fp);
+    if (rv) {
+      ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02082)
+                   "Unable to flush file: %s", path);
+      return rv;
+    }
+
+    rv = apr_file_close(fp);
+    if (rv) {
+      ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02083)
+                   "Unable to close file: %s", path);
+      return rv;
+    }
+
+    rv = apr_file_perms_set(path,
+                            APR_FPROT_UREAD | APR_FPROT_GREAD |
+                            APR_FPROT_WREAD);
+    if (rv && rv != APR_INCOMPLETE && rv != APR_ENOTIMPL) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02084)
+                     "Unable to set file permissions on %s",
+                     path);
+        return rv;
+    }
+
+    rv = apr_file_rename(path, ctx->storage_path, p);
+
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02085)
+                     "Unable to move file: %s -> %s", path,
+                     ctx->storage_path);
+        return rv;
+    }
+
+    return APR_SUCCESS;
+}
+/* Store in a slotmem */
+static apr_status_t hm_slotmem_update_stats(hm_ctx_t *ctx, apr_pool_t *p)
+{
+    apr_status_t rv;
+    apr_time_t now;
+    apr_hash_index_t *hi;
+    now = apr_time_now();
+    for (hi = apr_hash_first(p, ctx->servers);
+         hi != NULL; hi = apr_hash_next(hi)) {
+        hm_server_t *s = NULL;
+        apr_time_t seen;
+        apr_hash_this(hi, NULL, NULL, (void **) &s);
+        seen = apr_time_sec(now - s->seen);
+        if (seen > SEEN_TIMEOUT) {
+            /* remove it */
+            rv = hm_slotmem_remove_stat(s, p);
+        } else {
+            /* update it */
+            rv = hm_slotmem_update_stat(s, p);
+        }
+        if (rv !=APR_SUCCESS)
+            return rv;
+    }
+    return APR_SUCCESS;
+}
+/* Store/update the stats */
+static apr_status_t hm_update_stats(hm_ctx_t *ctx, apr_pool_t *p)
+{
+    if (slotmem)
+        return hm_slotmem_update_stats(ctx, p);
+    else
+        return hm_file_update_stats(ctx, p);
+}
+
+static hm_server_t *hm_get_server(hm_ctx_t *ctx, const char *ip, const int port)
+{
+    hm_server_t *s;
+
+    s = apr_hash_get(ctx->servers, ip, APR_HASH_KEY_STRING);
+
+    if (s == NULL) {
+        s = apr_palloc(ctx->p, sizeof(hm_server_t));
+        s->ip = apr_pstrdup(ctx->p, ip);
+        s->port = port;
+        s->ready = 0;
+        s->busy = 0;
+        s->seen = 0;
+        apr_hash_set(ctx->servers, s->ip, APR_HASH_KEY_STRING, s);
+    }
+
+    return s;
+}
+
+/* Process a message received from a backend node */
+static void hm_processmsg(hm_ctx_t *ctx, apr_pool_t *p,
+                                  apr_sockaddr_t *from, char *buf, int len)
+{
+    apr_table_t *tbl;
+
+    buf[len] = '\0';
+
+    tbl = apr_table_make(p, 10);
+
+    qs_to_table(buf, tbl, p);
+
+    if (apr_table_get(tbl, "v") != NULL &&
+        apr_table_get(tbl, "busy") != NULL &&
+        apr_table_get(tbl, "ready") != NULL) {
+        char *ip;
+        int port = 80;
+        hm_server_t *s;
+        /* TODO: REMOVE ME BEFORE PRODUCTION (????) */
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ctx->s, APLOGNO(02086)
+                     "%pI busy=%s ready=%s", from,
+                     apr_table_get(tbl, "busy"), apr_table_get(tbl, "ready"));
+
+        apr_sockaddr_ip_get(&ip, from);
+
+        if (apr_table_get(tbl, "port") != NULL)
+            port = atoi(apr_table_get(tbl, "port"));
+
+        s = hm_get_server(ctx, ip, port);
+
+        s->busy = atoi(apr_table_get(tbl, "busy"));
+        s->ready = atoi(apr_table_get(tbl, "ready"));
+        s->seen = apr_time_now();
+    }
+    else {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ctx->s, APLOGNO(02087)
+                     "malformed message from %pI",
+                     from);
+    }
+
+}
+/* Read message from multicast socket */
+#define MAX_MSG_LEN (1000)
+static apr_status_t hm_recv(hm_ctx_t *ctx, apr_pool_t *p)
+{
+    char buf[MAX_MSG_LEN + 1];
+    apr_sockaddr_t from;
+    apr_size_t len = MAX_MSG_LEN;
+    apr_status_t rv;
+
+    from.pool = p;
+
+    rv = apr_socket_recvfrom(&from, ctx->sock, 0, buf, &len);
+
+    if (APR_STATUS_IS_EAGAIN(rv)) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02088) "would block");
+        return APR_SUCCESS;
+    }
+    else if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02089) "recvfrom failed");
+        return rv;
+    }
+
+    hm_processmsg(ctx, p, &from, buf, len);
+
+    return rv;
+}
+
+static apr_status_t hm_watchdog_callback(int state, void *data,
+                                         apr_pool_t *pool)
+{
+    apr_status_t rv = APR_SUCCESS;
+    apr_time_t cur, now;
+    hm_ctx_t *ctx = (hm_ctx_t *)data;
+
+    if (!ctx->active) {
+        return rv;
+    }
+
+    switch (state) {
+        case AP_WATCHDOG_STATE_STARTING:
+            rv = hm_listen(ctx);
+            if (rv) {
+                ctx->status = rv;
+                ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ctx->s, APLOGNO(02090)
+                             "Unable to listen for connections!");
+            }
+            else {
+                ctx->keep_running = 1;
+                ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ctx->s, APLOGNO(02091)
+                             "%s listener started.",
+                             HM_WATHCHDOG_NAME);
+            }
+        break;
+        case AP_WATCHDOG_STATE_RUNNING:
+            /* store in the slotmem or in the file depending on configuration */
+            hm_update_stats(ctx, pool);
+            cur = now = apr_time_sec(apr_time_now());
+            /* TODO: Insted HN_UPDATE_SEC use
+             * the ctx->interval
+             */
+            while ((now - cur) < apr_time_sec(ctx->interval)) {
+                int n;
+                apr_status_t rc;
+                apr_pool_t *p;
+                apr_pollfd_t pfd;
+                apr_interval_time_t timeout;
+
+                apr_pool_create(&p, pool);
+
+                pfd.desc_type = APR_POLL_SOCKET;
+                pfd.desc.s = ctx->sock;
+                pfd.p = p;
+                pfd.reqevents = APR_POLLIN;
+
+                timeout = apr_time_from_sec(1);
+
+                rc = apr_poll(&pfd, 1, &n, timeout);
+
+                if (!ctx->keep_running) {
+                    apr_pool_destroy(p);
+                    break;
+                }
+                if (rc == APR_SUCCESS && (pfd.rtnevents & APR_POLLIN)) {
+                    hm_recv(ctx, p);
+                }
+                now = apr_time_sec(apr_time_now());
+                apr_pool_destroy(p);
+            }
+        break;
+        case AP_WATCHDOG_STATE_STOPPING:
+            ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ctx->s, APLOGNO(02092)
+                         "stopping %s listener.",
+                         HM_WATHCHDOG_NAME);
+
+            ctx->keep_running = 0;
+            if (ctx->sock) {
+                apr_socket_close(ctx->sock);
+                ctx->sock = NULL;
+            }
+        break;
+    }
+    return rv;
+}
+
+static int hm_post_config(apr_pool_t *p, apr_pool_t *plog,
+                          apr_pool_t *ptemp, server_rec *s)
+{
+    apr_status_t rv;
+    hm_ctx_t *ctx = ap_get_module_config(s->module_config,
+                                         &heartmonitor_module);
+    APR_OPTIONAL_FN_TYPE(ap_watchdog_get_instance) *hm_watchdog_get_instance;
+    APR_OPTIONAL_FN_TYPE(ap_watchdog_register_callback) *hm_watchdog_register_callback;
+
+    hm_watchdog_get_instance = APR_RETRIEVE_OPTIONAL_FN(ap_watchdog_get_instance);
+    hm_watchdog_register_callback = APR_RETRIEVE_OPTIONAL_FN(ap_watchdog_register_callback);
+    if (!hm_watchdog_get_instance || !hm_watchdog_register_callback) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(02093)
+                     "mod_watchdog is required");
+        return !OK;
+    }
+
+    /* Create the slotmem */
+    if (ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_CONFIG) {
+        /* this is the real thing */
+        if (maxworkers) {
+            storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shm",
+                                         AP_SLOTMEM_PROVIDER_VERSION);
+            if (!storage) {
+                ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02284)
+                             "failed to lookup provider 'shm' for '%s', "
+                             "maybe you need to load mod_slotmem_shm?",
+                             AP_SLOTMEM_PROVIDER_GROUP);
+                return !OK;
+            }
+            storage->create(&slotmem, "mod_heartmonitor", sizeof(hm_slot_server_t), maxworkers, AP_SLOTMEM_TYPE_PREGRAB, p);
+            if (!slotmem) {
+                ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02285)
+                             "slotmem_create for status failed");
+                return !OK;
+            }
+        }
+    }
+
+    if (!ctx->active) {
+        return OK;
+    }
+    rv = hm_watchdog_get_instance(&ctx->watchdog,
+                                  HM_WATHCHDOG_NAME,
+                                  0, 1, p);
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(02094)
+                     "Failed to create watchdog instance (%s)",
+                     HM_WATHCHDOG_NAME);
+        return !OK;
+    }
+    /* Register a callback with zero interval. */
+    rv = hm_watchdog_register_callback(ctx->watchdog,
+                                       0,
+                                       ctx,
+                                       hm_watchdog_callback);
+    if (rv) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(02095)
+                     "Failed to register watchdog callback (%s)",
+                     HM_WATHCHDOG_NAME);
+        return !OK;
+    }
+    ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02096)
+                 "wd callback %s", HM_WATHCHDOG_NAME);
+    return OK;
+}
+
+static int hm_handler(request_rec *r)
+{
+    apr_bucket_brigade *input_brigade;
+    apr_size_t len;
+    char *buf;
+    apr_status_t status;
+    apr_table_t *tbl;
+    hm_server_t hmserver;
+    char *ip;
+    hm_ctx_t *ctx;
+
+    if (strcmp(r->handler, "heartbeat")) {
+        return DECLINED;
+    }
+    if (r->method_number != M_POST) {
+        return HTTP_METHOD_NOT_ALLOWED;
+    }
+
+    len = MAX_MSG_LEN;
+    ctx = ap_get_module_config(r->server->module_config,
+            &heartmonitor_module);
+
+    buf = apr_pcalloc(r->pool, MAX_MSG_LEN);
+    input_brigade = apr_brigade_create(r->connection->pool, r->connection->bucket_alloc);
+    status = ap_get_brigade(r->input_filters, input_brigade, AP_MODE_READBYTES, APR_BLOCK_READ, MAX_MSG_LEN);
+    if (status != APR_SUCCESS) {
+        return ap_map_http_request_error(status, HTTP_BAD_REQUEST);
+    }
+    apr_brigade_flatten(input_brigade, buf, &len);
+
+    /* we can't use hm_processmsg because it uses hm_get_server() */
+    buf[len] = '\0';
+    tbl = apr_table_make(r->pool, 10);
+    qs_to_table(buf, tbl, r->pool);
+    apr_sockaddr_ip_get(&ip, r->connection->client_addr);
+    hmserver.ip = ip;
+    hmserver.port = 80;
+    if (apr_table_get(tbl, "port") != NULL)
+        hmserver.port = atoi(apr_table_get(tbl, "port"));
+    hmserver.busy = atoi(apr_table_get(tbl, "busy"));
+    hmserver.ready = atoi(apr_table_get(tbl, "ready"));
+    hmserver.seen = apr_time_now();
+    hm_update_stat(ctx, &hmserver, r->pool);
+
+    ap_set_content_type(r, "text/plain");
+    ap_set_content_length(r, 2);
+    ap_rputs("OK", r);
+    ap_rflush(r);
+
+    return OK;
+}
+
+static void hm_register_hooks(apr_pool_t *p)
+{
+    static const char * const aszSucc[]={ "mod_proxy.c", NULL };
+    ap_hook_post_config(hm_post_config, NULL, NULL, APR_HOOK_MIDDLE);
+
+    ap_hook_handler(hm_handler, NULL, aszSucc, APR_HOOK_FIRST);
+}
+
+static void *hm_create_config(apr_pool_t *p, server_rec *s)
+{
+    hm_ctx_t *ctx = (hm_ctx_t *) apr_palloc(p, sizeof(hm_ctx_t));
+
+    ctx->active = 0;
+    ctx->storage_path = ap_runtime_dir_relative(p, DEFAULT_HEARTBEAT_STORAGE);
+    /* TODO: Add directive for tuning the update interval
+     */
+    ctx->interval = apr_time_from_sec(HM_UPDATE_SEC);
+    ctx->s = s;
+    apr_pool_create(&ctx->p, p);
+    ctx->servers = apr_hash_make(ctx->p);
+
+    return ctx;
+}
+
+static const char *cmd_hm_storage(cmd_parms *cmd,
+                                  void *dconf, const char *path)
+{
+    apr_pool_t *p = cmd->pool;
+    hm_ctx_t *ctx =
+        (hm_ctx_t *) ap_get_module_config(cmd->server->module_config,
+                                          &heartmonitor_module);
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    ctx->storage_path = ap_runtime_dir_relative(p, path);
+
+    return NULL;
+}
+
+static const char *cmd_hm_listen(cmd_parms *cmd,
+                                 void *dconf, const char *mcast_addr)
+{
+    apr_status_t rv;
+    char *host_str;
+    char *scope_id;
+    apr_port_t port = 0;
+    apr_pool_t *p = cmd->pool;
+    hm_ctx_t *ctx =
+        (hm_ctx_t *) ap_get_module_config(cmd->server->module_config,
+                                          &heartmonitor_module);
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (!ctx->active) {
+        ctx->active = 1;
+    }
+    else {
+        return "HeartbeatListen: May only be specified once.";
+    }
+
+    rv = apr_parse_addr_port(&host_str, &scope_id, &port, mcast_addr, cmd->temp_pool);
+
+    if (rv) {
+        return "HeartbeatListen: Unable to parse multicast address.";
+    }
+
+    if (host_str == NULL) {
+        return "HeartbeatListen: No host provided in multicast address";
+    }
+
+    if (port == 0) {
+        return "HeartbeatListen: No port provided in multicast address";
+    }
+
+    rv = apr_sockaddr_info_get(&ctx->mcast_addr, host_str, APR_INET, port, 0,
+                               p);
+
+    if (rv) {
+        return
+            "HeartbeatListen: apr_sockaddr_info_get failed on multicast address";
+    }
+
+    return NULL;
+}
+
+static const char *cmd_hm_maxworkers(cmd_parms *cmd,
+                                  void *dconf, const char *data)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    maxworkers = atoi(data);
+    if (maxworkers <= 10)
+        return "HeartbeatMaxServers: Should be bigger than 10";
+
+    return NULL;
+}
+
+static const command_rec hm_cmds[] = {
+    AP_INIT_TAKE1("HeartbeatListen", cmd_hm_listen, NULL, RSRC_CONF,
+                  "Address to listen for heartbeat requests"),
+    AP_INIT_TAKE1("HeartbeatStorage", cmd_hm_storage, NULL, RSRC_CONF,
+                  "Path to store heartbeat data."),
+    AP_INIT_TAKE1("HeartbeatMaxServers", cmd_hm_maxworkers, NULL, RSRC_CONF,
+                  "Max number of servers when using slotmem (instead file) to store heartbeat data."),
+    {NULL}
+};
+
+AP_DECLARE_MODULE(heartmonitor) = {
+    STANDARD20_MODULE_STUFF,
+    NULL,                       /* create per-directory config structure */
+    NULL,                       /* merge per-directory config structures */
+    hm_create_config,           /* create per-server config structure */
+    NULL,                       /* merge per-server config structures */
+    hm_cmds,                    /* command apr_table_t */
+    hm_register_hooks
+};
diff --git a/modules/cluster/mod_heartmonitor.dep b/modules/cluster/mod_heartmonitor.dep
new file mode 100644
index 0000000..266efbf
--- /dev/null
+++ b/modules/cluster/mod_heartmonitor.dep
@@ -0,0 +1,63 @@
+# Microsoft Developer Studio Generated Dependency File, included by mod_heartmonitor.mak
+
+.\mod_heartmonitor.c : \
+	"..\..\include\ap_config.h"\
+	"..\..\include\ap_config_layout.h"\
+	"..\..\include\ap_expr.h"\
+	"..\..\include\ap_hooks.h"\
+	"..\..\include\ap_mmn.h"\
+	"..\..\include\ap_mpm.h"\
+	"..\..\include\ap_provider.h"\
+	"..\..\include\ap_regex.h"\
+	"..\..\include\ap_release.h"\
+	"..\..\include\ap_slotmem.h"\
+	"..\..\include\apache_noprobes.h"\
+	"..\..\include\heartbeat.h"\
+	"..\..\include\http_config.h"\
+	"..\..\include\http_core.h"\
+	"..\..\include\http_log.h"\
+	"..\..\include\http_protocol.h"\
+	"..\..\include\httpd.h"\
+	"..\..\include\os.h"\
+	"..\..\include\scoreboard.h"\
+	"..\..\include\util_cfgtree.h"\
+	"..\..\include\util_filter.h"\
+	"..\..\srclib\apr-util\include\apr_buckets.h"\
+	"..\..\srclib\apr-util\include\apr_hooks.h"\
+	"..\..\srclib\apr-util\include\apr_md5.h"\
+	"..\..\srclib\apr-util\include\apr_optional.h"\
+	"..\..\srclib\apr-util\include\apr_optional_hooks.h"\
+	"..\..\srclib\apr-util\include\apr_uri.h"\
+	"..\..\srclib\apr-util\include\apr_xlate.h"\
+	"..\..\srclib\apr-util\include\apu.h"\
+	"..\..\srclib\apr\include\apr.h"\
+	"..\..\srclib\apr\include\apr_allocator.h"\
+	"..\..\srclib\apr\include\apr_dso.h"\
+	"..\..\srclib\apr\include\apr_errno.h"\
+	"..\..\srclib\apr\include\apr_file_info.h"\
+	"..\..\srclib\apr\include\apr_file_io.h"\
+	"..\..\srclib\apr\include\apr_general.h"\
+	"..\..\srclib\apr\include\apr_global_mutex.h"\
+	"..\..\srclib\apr\include\apr_hash.h"\
+	"..\..\srclib\apr\include\apr_inherit.h"\
+	"..\..\srclib\apr\include\apr_mmap.h"\
+	"..\..\srclib\apr\include\apr_network_io.h"\
+	"..\..\srclib\apr\include\apr_poll.h"\
+	"..\..\srclib\apr\include\apr_pools.h"\
+	"..\..\srclib\apr\include\apr_portable.h"\
+	"..\..\srclib\apr\include\apr_proc_mutex.h"\
+	"..\..\srclib\apr\include\apr_ring.h"\
+	"..\..\srclib\apr\include\apr_shm.h"\
+	"..\..\srclib\apr\include\apr_strings.h"\
+	"..\..\srclib\apr\include\apr_tables.h"\
+	"..\..\srclib\apr\include\apr_thread_mutex.h"\
+	"..\..\srclib\apr\include\apr_thread_proc.h"\
+	"..\..\srclib\apr\include\apr_time.h"\
+	"..\..\srclib\apr\include\apr_user.h"\
+	"..\..\srclib\apr\include\apr_want.h"\
+	"..\core\mod_watchdog.h"\
+	
+
+..\..\build\win32\httpd.rc : \
+	"..\..\include\ap_release.h"\
+	
diff --git a/modules/cluster/mod_heartmonitor.dsp b/modules/cluster/mod_heartmonitor.dsp
new file mode 100644
index 0000000..8eb716b
--- /dev/null
+++ b/modules/cluster/mod_heartmonitor.dsp
@@ -0,0 +1,123 @@
+# Microsoft Developer Studio Project File - Name="mod_heartmonitor" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102
+
+CFG=mod_heartmonitor - Win32 Release
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_heartmonitor.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_heartmonitor.mak" CFG="mod_heartmonitor - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "mod_heartmonitor - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "mod_heartmonitor - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+CPP=cl.exe
+MTL=midl.exe
+RSC=rc.exe
+
+!IF  "$(CFG)" == "mod_heartmonitor - Win32 Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "Release"
+# PROP BASE Intermediate_Dir "Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Release"
+# PROP Intermediate_Dir "Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /FD /c
+# ADD CPP /nologo /MD /W3 /O2 /Oy- /Zi /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /Fd"Release\mod_heartmonitor_src" /FD /c
+# ADD BASE MTL /nologo /D "NDEBUG" /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x809 /d "NDEBUG"
+# ADD RSC /l 0x409 /fo"Release/mod_heartmonitor.res" /i "../../include" /i "../../srclib/apr/include" /d "NDEBUG" /d BIN_NAME="mod_heartmonitor.so" /d LONG_NAME="heartmonitor_module for Apache"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /out:".\Release\mod_heartmonitor.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartmonitor.so
+# ADD LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Release\mod_heartmonitor.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartmonitor.so /opt:ref
+# Begin Special Build Tool
+TargetPath=.\Release\mod_heartmonitor.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+PostBuild_Cmds=if exist $(TargetPath).manifest mt.exe -manifest $(TargetPath).manifest -outputresource:$(TargetPath);2
+# End Special Build Tool
+
+!ELSEIF  "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "Debug"
+# PROP BASE Intermediate_Dir "Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Debug"
+# PROP Intermediate_Dir "Debug"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MDd /W3 /EHsc /Zi /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /FD /c
+# ADD CPP /nologo /MDd /W3 /EHsc /Zi /Od /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /Fd"Debug\mod_heartmonitor_src" /FD /c
+# ADD BASE MTL /nologo /D "_DEBUG" /win32
+# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x809 /d "_DEBUG"
+# ADD RSC /l 0x409 /fo"Debug/mod_heartmonitor.res" /i "../../include" /i "../../srclib/apr/include" /d "_DEBUG" /d BIN_NAME="mod_heartmonitor.so" /d LONG_NAME="heartmonitor_module for Apache"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Debug\mod_heartmonitor.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartmonitor.so
+# ADD LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Debug\mod_heartmonitor.so" /base:@..\..\os\win32\BaseAddr.ref,mod_heartmonitor.so
+# Begin Special Build Tool
+TargetPath=.\Debug\mod_heartmonitor.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+PostBuild_Cmds=if exist $(TargetPath).manifest mt.exe -manifest $(TargetPath).manifest -outputresource:$(TargetPath);2
+# End Special Build Tool
+
+!ENDIF 
+
+# Begin Target
+
+# Name "mod_heartmonitor - Win32 Release"
+# Name "mod_heartmonitor - Win32 Debug"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;hpj;bat;for;f90"
+# Begin Source File
+
+SOURCE=.\mod_heartmonitor.c
+# End Source File
+# End Group
+# Begin Group "Header Files"
+
+# PROP Default_Filter ".h"
+# Begin Source File
+
+SOURCE=.\mod_proxy.h
+# End Source File
+# End Group
+# Begin Source File
+
+SOURCE=..\..\build\win32\httpd.rc
+# End Source File
+# End Target
+# End Project
diff --git a/modules/cluster/mod_heartmonitor.mak b/modules/cluster/mod_heartmonitor.mak
new file mode 100644
index 0000000..2d935d5
--- /dev/null
+++ b/modules/cluster/mod_heartmonitor.mak
@@ -0,0 +1,380 @@
+# Microsoft Developer Studio Generated NMAKE File, Based on mod_heartmonitor.dsp
+!IF "$(CFG)" == ""
+CFG=mod_heartmonitor - Win32 Release
+!MESSAGE No configuration specified. Defaulting to mod_heartmonitor - Win32 Release.
+!ENDIF 
+
+!IF "$(CFG)" != "mod_heartmonitor - Win32 Release" && "$(CFG)" != "mod_heartmonitor - Win32 Debug"
+!MESSAGE Invalid configuration "$(CFG)" specified.
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_heartmonitor.mak" CFG="mod_heartmonitor - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "mod_heartmonitor - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "mod_heartmonitor - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+!ERROR An invalid configuration is specified.
+!ENDIF 
+
+!IF "$(OS)" == "Windows_NT"
+NULL=
+!ELSE 
+NULL=nul
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartmonitor - Win32 Release"
+
+OUTDIR=.\Release
+INTDIR=.\Release
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+# Begin Custom Macros
+OutDir=.\Release
+# End Custom Macros
+
+!IF "$(RECURSE)" == "0" 
+
+ALL : "$(OUTDIR)\mod_heartmonitor.so" "$(DS_POSTBUILD_DEP)"
+
+!ELSE 
+
+ALL : "mod_watchdog - Win32 Release" "libhttpd - Win32 Release" "libaprutil - Win32 Release" "libapr - Win32 Release" "$(OUTDIR)\mod_heartmonitor.so" "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+!IF "$(RECURSE)" == "1" 
+CLEAN :"libapr - Win32 ReleaseCLEAN" "libaprutil - Win32 ReleaseCLEAN" "libhttpd - Win32 ReleaseCLEAN" "mod_watchdog - Win32 ReleaseCLEAN" 
+!ELSE 
+CLEAN :
+!ENDIF 
+	-@erase "$(INTDIR)\mod_heartmonitor.obj"
+	-@erase "$(INTDIR)\mod_heartmonitor.res"
+	-@erase "$(INTDIR)\mod_heartmonitor_src.idb"
+	-@erase "$(INTDIR)\mod_heartmonitor_src.pdb"
+	-@erase "$(OUTDIR)\mod_heartmonitor.exp"
+	-@erase "$(OUTDIR)\mod_heartmonitor.lib"
+	-@erase "$(OUTDIR)\mod_heartmonitor.pdb"
+	-@erase "$(OUTDIR)\mod_heartmonitor.so"
+
+"$(OUTDIR)" :
+    if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
+
+CPP=cl.exe
+CPP_PROJ=/nologo /MD /W3 /Zi /O2 /Oy- /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\mod_heartmonitor_src" /FD /c 
+
+.c{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.c{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+MTL=midl.exe
+MTL_PROJ=/nologo /D "NDEBUG" /mktyplib203 /win32 
+RSC=rc.exe
+RSC_PROJ=/l 0x409 /fo"$(INTDIR)\mod_heartmonitor.res" /i "../../include" /i "../../srclib/apr/include" /d "NDEBUG" /d BIN_NAME="mod_heartmonitor.so" /d LONG_NAME="heartmonitor_module for Apache" 
+BSC32=bscmake.exe
+BSC32_FLAGS=/nologo /o"$(OUTDIR)\mod_heartmonitor.bsc" 
+BSC32_SBRS= \
+	
+LINK32=link.exe
+LINK32_FLAGS=kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /pdb:"$(OUTDIR)\mod_heartmonitor.pdb" /debug /out:"$(OUTDIR)\mod_heartmonitor.so" /implib:"$(OUTDIR)\mod_heartmonitor.lib" /base:@..\..\os\win32\BaseAddr.ref,mod_heartmonitor.so /opt:ref 
+LINK32_OBJS= \
+	"$(INTDIR)\mod_heartmonitor.obj" \
+	"$(INTDIR)\mod_heartmonitor.res" \
+	"..\..\srclib\apr\Release\libapr-1.lib" \
+	"..\..\srclib\apr-util\Release\libaprutil-1.lib" \
+	"..\..\Release\libhttpd.lib" \
+	"..\core\Release\mod_watchdog.lib"
+
+"$(OUTDIR)\mod_heartmonitor.so" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
+    $(LINK32) @<<
+  $(LINK32_FLAGS) $(LINK32_OBJS)
+<<
+
+TargetPath=.\Release\mod_heartmonitor.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+
+# Begin Custom Macros
+OutDir=.\Release
+# End Custom Macros
+
+"$(DS_POSTBUILD_DEP)" : "$(OUTDIR)\mod_heartmonitor.so"
+   if exist .\Release\mod_heartmonitor.so.manifest mt.exe -manifest .\Release\mod_heartmonitor.so.manifest -outputresource:.\Release\mod_heartmonitor.so;2
+	echo Helper for Post-build step > "$(DS_POSTBUILD_DEP)"
+
+!ELSEIF  "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+
+OUTDIR=.\Debug
+INTDIR=.\Debug
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+# Begin Custom Macros
+OutDir=.\Debug
+# End Custom Macros
+
+!IF "$(RECURSE)" == "0" 
+
+ALL : "$(OUTDIR)\mod_heartmonitor.so" "$(DS_POSTBUILD_DEP)"
+
+!ELSE 
+
+ALL : "mod_watchdog - Win32 Debug" "libhttpd - Win32 Debug" "libaprutil - Win32 Debug" "libapr - Win32 Debug" "$(OUTDIR)\mod_heartmonitor.so" "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+!IF "$(RECURSE)" == "1" 
+CLEAN :"libapr - Win32 DebugCLEAN" "libaprutil - Win32 DebugCLEAN" "libhttpd - Win32 DebugCLEAN" "mod_watchdog - Win32 DebugCLEAN" 
+!ELSE 
+CLEAN :
+!ENDIF 
+	-@erase "$(INTDIR)\mod_heartmonitor.obj"
+	-@erase "$(INTDIR)\mod_heartmonitor.res"
+	-@erase "$(INTDIR)\mod_heartmonitor_src.idb"
+	-@erase "$(INTDIR)\mod_heartmonitor_src.pdb"
+	-@erase "$(OUTDIR)\mod_heartmonitor.exp"
+	-@erase "$(OUTDIR)\mod_heartmonitor.lib"
+	-@erase "$(OUTDIR)\mod_heartmonitor.pdb"
+	-@erase "$(OUTDIR)\mod_heartmonitor.so"
+
+"$(OUTDIR)" :
+    if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
+
+CPP=cl.exe
+CPP_PROJ=/nologo /MDd /W3 /Zi /Od /I "../core" /I "../../include" /I "../../srclib/apr/include" /I "../../srclib/apr-util/include" /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\mod_heartmonitor_src" /FD /EHsc /c 
+
+.c{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.c{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+MTL=midl.exe
+MTL_PROJ=/nologo /D "_DEBUG" /mktyplib203 /win32 
+RSC=rc.exe
+RSC_PROJ=/l 0x409 /fo"$(INTDIR)\mod_heartmonitor.res" /i "../../include" /i "../../srclib/apr/include" /d "_DEBUG" /d BIN_NAME="mod_heartmonitor.so" /d LONG_NAME="heartmonitor_module for Apache" 
+BSC32=bscmake.exe
+BSC32_FLAGS=/nologo /o"$(OUTDIR)\mod_heartmonitor.bsc" 
+BSC32_SBRS= \
+	
+LINK32=link.exe
+LINK32_FLAGS=kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /pdb:"$(OUTDIR)\mod_heartmonitor.pdb" /debug /out:"$(OUTDIR)\mod_heartmonitor.so" /implib:"$(OUTDIR)\mod_heartmonitor.lib" /base:@..\..\os\win32\BaseAddr.ref,mod_heartmonitor.so 
+LINK32_OBJS= \
+	"$(INTDIR)\mod_heartmonitor.obj" \
+	"$(INTDIR)\mod_heartmonitor.res" \
+	"..\..\srclib\apr\Debug\libapr-1.lib" \
+	"..\..\srclib\apr-util\Debug\libaprutil-1.lib" \
+	"..\..\Debug\libhttpd.lib" \
+	"..\core\Debug\mod_watchdog.lib"
+
+"$(OUTDIR)\mod_heartmonitor.so" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
+    $(LINK32) @<<
+  $(LINK32_FLAGS) $(LINK32_OBJS)
+<<
+
+TargetPath=.\Debug\mod_heartmonitor.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+
+# Begin Custom Macros
+OutDir=.\Debug
+# End Custom Macros
+
+"$(DS_POSTBUILD_DEP)" : "$(OUTDIR)\mod_heartmonitor.so"
+   if exist .\Debug\mod_heartmonitor.so.manifest mt.exe -manifest .\Debug\mod_heartmonitor.so.manifest -outputresource:.\Debug\mod_heartmonitor.so;2
+	echo Helper for Post-build step > "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+
+!IF "$(NO_EXTERNAL_DEPS)" != "1"
+!IF EXISTS("mod_heartmonitor.dep")
+!INCLUDE "mod_heartmonitor.dep"
+!ELSE 
+!MESSAGE Warning: cannot find "mod_heartmonitor.dep"
+!ENDIF 
+!ENDIF 
+
+
+!IF "$(CFG)" == "mod_heartmonitor - Win32 Release" || "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+SOURCE=.\mod_heartmonitor.c
+
+"$(INTDIR)\mod_heartmonitor.obj" : $(SOURCE) "$(INTDIR)"
+
+
+!IF  "$(CFG)" == "mod_heartmonitor - Win32 Release"
+
+"libapr - Win32 Release" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Release" 
+   cd "..\..\modules\cluster"
+
+"libapr - Win32 ReleaseCLEAN" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+
+"libapr - Win32 Debug" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Debug" 
+   cd "..\..\modules\cluster"
+
+"libapr - Win32 DebugCLEAN" : 
+   cd ".\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartmonitor - Win32 Release"
+
+"libaprutil - Win32 Release" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Release" 
+   cd "..\..\modules\cluster"
+
+"libaprutil - Win32 ReleaseCLEAN" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+
+"libaprutil - Win32 Debug" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Debug" 
+   cd "..\..\modules\cluster"
+
+"libaprutil - Win32 DebugCLEAN" : 
+   cd ".\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\..\modules\cluster"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartmonitor - Win32 Release"
+
+"libhttpd - Win32 Release" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Release" 
+   cd ".\modules\cluster"
+
+"libhttpd - Win32 ReleaseCLEAN" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Release" RECURSE=1 CLEAN 
+   cd ".\modules\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+
+"libhttpd - Win32 Debug" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Debug" 
+   cd ".\modules\cluster"
+
+"libhttpd - Win32 DebugCLEAN" : 
+   cd ".\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Debug" RECURSE=1 CLEAN 
+   cd ".\modules\cluster"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_heartmonitor - Win32 Release"
+
+"mod_watchdog - Win32 Release" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Release" 
+   cd "..\cluster"
+
+"mod_watchdog - Win32 ReleaseCLEAN" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\cluster"
+
+!ELSEIF  "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+
+"mod_watchdog - Win32 Debug" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Debug" 
+   cd "..\cluster"
+
+"mod_watchdog - Win32 DebugCLEAN" : 
+   cd ".\..\core"
+   $(MAKE) /$(MAKEFLAGS) /F ".\mod_watchdog.mak" CFG="mod_watchdog - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\cluster"
+
+!ENDIF 
+
+SOURCE=..\..\build\win32\httpd.rc
+
+!IF  "$(CFG)" == "mod_heartmonitor - Win32 Release"
+
+
+"$(INTDIR)\mod_heartmonitor.res" : $(SOURCE) "$(INTDIR)"
+	$(RSC) /l 0x409 /fo"$(INTDIR)\mod_heartmonitor.res" /i "../../include" /i "../../srclib/apr/include" /i "../../build\win32" /d "NDEBUG" /d BIN_NAME="mod_heartmonitor.so" /d LONG_NAME="heartmonitor_module for Apache" $(SOURCE)
+
+
+!ELSEIF  "$(CFG)" == "mod_heartmonitor - Win32 Debug"
+
+
+"$(INTDIR)\mod_heartmonitor.res" : $(SOURCE) "$(INTDIR)"
+	$(RSC) /l 0x409 /fo"$(INTDIR)\mod_heartmonitor.res" /i "../../include" /i "../../srclib/apr/include" /i "../../build\win32" /d "_DEBUG" /d BIN_NAME="mod_heartmonitor.so" /d LONG_NAME="heartmonitor_module for Apache" $(SOURCE)
+
+
+!ENDIF 
+
+
+!ENDIF 
+