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diff --git a/include/mod_core.h b/include/mod_core.h
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+/* 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.
+ */
+
+
+/**
+ * @file  mod_core.h
+ * @brief mod_core private header file
+ *
+ * @defgroup MOD_CORE mod_core
+ * @ingroup  APACHE_MODS
+ * @{
+ */
+
+#ifndef MOD_CORE_H
+#define MOD_CORE_H
+
+#include "apr.h"
+#include "apr_buckets.h"
+
+#include "httpd.h"
+#include "util_filter.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Handles for core filters */
+AP_DECLARE_DATA extern ap_filter_rec_t *ap_http_input_filter_handle;
+AP_DECLARE_DATA extern ap_filter_rec_t *ap_http_header_filter_handle;
+AP_DECLARE_DATA extern ap_filter_rec_t *ap_chunk_filter_handle;
+AP_DECLARE_DATA extern ap_filter_rec_t *ap_http_outerror_filter_handle;
+AP_DECLARE_DATA extern ap_filter_rec_t *ap_byterange_filter_handle;
+
+/*
+ * These (input) filters are internal to the mod_core operation.
+ */
+apr_status_t ap_http_filter(ap_filter_t *f, apr_bucket_brigade *b,
+                            ap_input_mode_t mode, apr_read_type_e block,
+                            apr_off_t readbytes);
+
+/* HTTP/1.1 chunked transfer encoding filter. */
+apr_status_t ap_http_chunk_filter(ap_filter_t *f, apr_bucket_brigade *b);
+
+/* Filter to handle any error buckets on output */
+apr_status_t ap_http_outerror_filter(ap_filter_t *f,
+                                     apr_bucket_brigade *b);
+
+char *ap_response_code_string(request_rec *r, int error_index);
+
+/**
+ * Send the minimal part of an HTTP response header.
+ * @param r The current request
+ * @param bb The brigade to add the header to.
+ * @warning Modules should be very careful about using this, and should
+ *          the default behavior.  Much of the HTTP/1.1 implementation
+ *          correctness depends on the full headers.
+ * @fn void ap_basic_http_header(request_rec *r, apr_bucket_brigade *bb)
+ */
+AP_DECLARE(void) ap_basic_http_header(request_rec *r, apr_bucket_brigade *bb);
+
+/**
+ * Send an appropriate response to an http TRACE request.
+ * @param r The current request
+ * @note returns DONE or the HTTP status error if it handles the TRACE,
+ * or DECLINED if the request was not for TRACE.
+ * request method was not TRACE.
+ */
+AP_DECLARE_NONSTD(int) ap_send_http_trace(request_rec *r);
+
+/**
+ * Send an appropriate response to an http OPTIONS request.
+ * @param r The current request
+ */
+AP_DECLARE(int) ap_send_http_options(request_rec *r);
+
+/* Used for multipart/byteranges boundary string */
+AP_DECLARE_DATA extern const char *ap_multipart_boundary;
+
+/* Init RNG at startup */
+AP_CORE_DECLARE(void) ap_init_rng(apr_pool_t *p);
+/* Update RNG state in parent after fork */
+AP_CORE_DECLARE(void) ap_random_parent_after_fork(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* !MOD_CORE_H */
+/** @} */