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diff --git a/modules/http2/h2_c1.h b/modules/http2/h2_c1.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.
+ */
+
+#ifndef __mod_h2__h2_c1__
+#define __mod_h2__h2_c1__
+
+#include <http_core.h>
+
+struct h2_conn_ctx_t;
+
+extern APR_OPTIONAL_FN_TYPE(ap_logio_add_bytes_in) *h2_c_logio_add_bytes_in;
+extern APR_OPTIONAL_FN_TYPE(ap_logio_add_bytes_out) *h2_c_logio_add_bytes_out;
+
+/* Initialize this child process for h2 primary connection work,
+ * to be called once during child init before multi processing
+ * starts.
+ */
+apr_status_t h2_c1_child_init(apr_pool_t *pool, server_rec *s);
+
+/**
+ * Setup the primary connection and our context for HTTP/2 processing
+ *
+ * @param c the connection HTTP/2 is starting on
+ * @param r the upgrade request that still awaits an answer, optional
+ * @param s the server selected for this connection (can be != c->base_server)
+ */
+apr_status_t h2_c1_setup(conn_rec *c, request_rec *r, server_rec *s);
+
+/**
+ * Run the HTTP/2 primary connection in synchronous fashion.
+ * Return when the HTTP/2 session is done
+ * and the connection will close or a fatal error occurred.
+ *
+ * @param c the http2 connection to run
+ * @return APR_SUCCESS when session is done.
+ */
+apr_status_t h2_c1_run(conn_rec *c);
+
+/**
+ * The primary connection is about to close. If we have not send a GOAWAY
+ * yet, this is the last chance.
+ */
+apr_status_t h2_c1_pre_close(struct h2_conn_ctx_t *ctx, conn_rec *c);
+
+/**
+ * Check if the connection allows a direct detection of HTTPP/2,
+ * as configurable by the H2Direct directive.
+ * @param c the connection to check on
+ * @return != 0 if direct detection is enabled
+ */
+int h2_c1_allows_direct(conn_rec *c);
+
+/**
+ * Check if the "Upgrade" HTTP/1.1 mode of protocol switching is enabled
+ * for the given request.
+ * @param r the request to check
+ * @return != 0 iff Upgrade switching is enabled
+ */
+int h2_c1_can_upgrade(request_rec *r);
+
+/* Register hooks for h2 handling on primary connections.
+ */
+void h2_c1_register_hooks(void);
+
+/**
+ * Child is about to be stopped, release unused resources
+ */
+void h2_c1_child_stopping(apr_pool_t *pool, int graceful);
+
+#endif /* defined(__mod_h2__h2_c1__) */