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name : http_vhost.h
 /* 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_vhost.h
 * @brief Virtual Host package
 *
 * @defgroup APACHE_CORE_VHOST Virtual Host Package
 * @ingroup  APACHE_CORE
 * @{
 */

#ifndef APACHE_HTTP_VHOST_H
#define APACHE_HTTP_VHOST_H

#ifdef __cplusplus
extern "C" {
#endif

/**
 * called before any config is read
 * @param p Pool to allocate out of
 */
AP_DECLARE(void) ap_init_vhost_config(apr_pool_t *p);

/**
 * called after the config has been read to compile the tables needed to do
 * the run-time vhost lookups
 * @param p The pool to allocate out of
 * @param main_server The start of the virtual host list
 */
AP_DECLARE(void) ap_fini_vhost_config(apr_pool_t *p, server_rec *main_server);

/**
 * handle addresses in "<VirtualHost>" statement
 * @param p The pool to allocate out of
 * @param hostname The hostname in the VirtualHost statement
 * @param s The list of Virtual Hosts.
 */
const char *ap_parse_vhost_addrs(apr_pool_t *p, const char *hostname, server_rec *s);

/**
 * handle NameVirtualHost directive
 * @param cmd Command Parameters structure
 * @param dummy NOT USED
 * @param arg a host of the form "<address>[:port]"
 */
AP_DECLARE_NONSTD(const char *)ap_set_name_virtual_host(cmd_parms *cmd,
                                                        void *dummy,
                                                        const char *arg);

/**
 * Callback function for every Name Based Virtual Host.
 * @param baton Opaque user object
 * @param conn The current Connection
 * @param s The current Server
 * @see ap_vhost_iterate_given_conn
 * @return 0 on success, any non-zero return will stop the iteration.
 */
typedef int(*ap_vhost_iterate_conn_cb)(void* baton, conn_rec* conn, server_rec* s);

/**
 * For every virtual host on this connection, call func_cb.
 * @param conn The current connection
 * @param func_cb Function called for every Name Based Virtual Host for this
 *                connection.
 * @param baton Opaque object passed to func_cb.
 * @return The return value from func_cb.
 * @note If func_cb returns non-zero, the function will return at this point,
 *       and not continue iterating the virtual hosts.
 */
AP_DECLARE(int) ap_vhost_iterate_given_conn(conn_rec *conn,
                                            ap_vhost_iterate_conn_cb func_cb,
                                            void* baton);

/**
 * given an ip address only, give our best guess as to what vhost it is
 * @param conn The current connection
 */
AP_DECLARE(void) ap_update_vhost_given_ip(conn_rec *conn);

/**
 * ap_update_vhost_given_ip is never enough, and this is always called after
 * the headers have been read.  It may change r->server.
 * @param r The current request
 */
AP_DECLARE(void) ap_update_vhost_from_headers(request_rec *r);

/**
 * Updates r->server with the best name-based virtual host match, within
 * the chain of matching virtual hosts selected by ap_update_vhost_given_ip.
 * @param r The current request
 * @param require_match 1 to return an HTTP error if the requested hostname is
 * not explicitly matched to a VirtualHost. 
 * @return return HTTP_OK unless require_match was specified and the requested
 * hostname did not match any ServerName, ServerAlias, or VirtualHost 
 * address-spec.
 */
AP_DECLARE(int) ap_update_vhost_from_headers_ex(request_rec *r, int require_match);


/**
 * Match the host in the header with the hostname of the server for this
 * request.
 * @param r The current request
 * @param host The hostname in the headers
 * @param port The port from the headers
 * @return return 1 if the host:port matches any of the aliases of r->server,
 * return 0 otherwise
 */
AP_DECLARE(int) ap_matches_request_vhost(request_rec *r, const char *host,
    apr_port_t port);

#ifdef __cplusplus
}
#endif

#endif  /* !APACHE_HTTP_VHOST_H */
/** @} */
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