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àœ¸ËªbÑ¿Å„Oºß_†I|¥�+ÀÃ :    /* 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  http_ssl.h
 * @brief SSL protocol handling
 *
 * @defgroup APACHE_CORE_PROTO SSL Protocol Handling
 * @ingroup  APACHE_CORE
 * @{
 */

#ifndef APACHE_HTTP_SSL_H
#define APACHE_HTTP_SSL_H

#include "httpd.h"
#include "apr_portable.h"
#include "apr_mmap.h"

#ifdef __cplusplus
extern "C" {
#endif

struct ap_conf_vector_t;

/**
 * This hook allows modules that manage SSL connection to register their
 * inquiry function for checking if a connection is using SSL from them.
 * @param c The current connection
 * @return OK if the connection is using SSL, DECLINED if not.
 * @ingroup hooks
 */
AP_DECLARE_HOOK(int,ssl_conn_is_ssl,(conn_rec *c))

/**
 * Return != 0 iff the connection is encrypted with SSL.
 * @param c the connection
 */
AP_DECLARE(int) ap_ssl_conn_is_ssl(conn_rec *c);

/**
 * This hook declares a connection to be outgoing and the configuration that applies to it.
 * This hook can be called several times in the lifetime of an outgoing connection, e.g.
 * when it is re-used in different request contexts. It will at least be called after the
 * connection was created and before the pre-connection hooks is invoked.
 * All outgoing-connection hooks are run until one returns something other than DECLINE.
 * if enable_ssl != 0, a hook that sets up SSL for the connection needs to return OK
 * to prevent subsequent hooks from doing the same.
 *
 * @param c The connection on which requests/data are to be sent.
 * @param dir_conf The directory configuration in which this connection is being used.
 * @param enable_ssl If != 0, the SSL protocol should be enabled for this connection.
 * @return DECLINED, OK when ssl was enabled
 */
AP_DECLARE_HOOK(int, ssl_bind_outgoing,
               (conn_rec *c, struct ap_conf_vector_t *dir_conf, int enable_ssl))

/**
 * Assures the connection is marked as outgoing and invokes the ssl_bind_outgoing hook.
 * This may be called several times on an outgoing connection with varying dir_conf
 * values. require_ssl is not allowed to change on the same connection.
 *
 * @param c The connection on which requests/data are to be sent.
 * @param dir_conf The directory configuration in which this connection is being used.
 * @param require_ssl != 0 iff this connection needs to be secured by SSL/TLS protocol.
 * @return OK iff ssl was required and is enabled, DECLINED otherwise
 */
AP_DECLARE(int) ap_ssl_bind_outgoing(conn_rec *c, struct ap_conf_vector_t *dir_conf,
                                     int require_ssl);

/**
 * Return != 0 iff handlers/hooks for outgoing connections are registered.
 */
AP_DECLARE(int) ap_ssl_has_outgoing_handlers(void);

/**
 * This hook allows modules to look up SSL related variables for a
 * server/connection/request, depending on what they inquire. Some
 * variables will only be available for a connection/request, for example.
 * @param p The pool to allocate a returned value in, MUST be provided
 * @param s The server to inquire a value for, maybe NULL
 * @param c The current connection, maybe NULL
 * @param r The current request, maybe NULL
 * @param name The name of the variable to retrieve, MUST be provided
 * @return value or the variable or NULL if not provided/available
 * @ingroup hooks
 */
AP_DECLARE