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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#ifndef MOD_PROXY_H
#define MOD_PROXY_H
/*
* Main include file for the Apache proxy
*/
/*
Also note numerous FIXMEs and CHECKMEs which should be eliminated.
This code is once again experimental!
Things to do:
1. Make it completely work (for FTP too)
2. HTTP/1.1
Chuck Murcko <chuck@topsail.org> 02-06-01
*/
#define CORE_PRIVATE
#include "apr_hooks.h"
#include "apr.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_buckets.h"
#include "apr_md5.h"
#include "apr_network_io.h"
#include "apr_pools.h"
#include "apr_strings.h"
#include "apr_uri.h"
#include "apr_date.h"
#include "apr_fnmatch.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "httpd.h"
#include "http_config.h"
#include "ap_config.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_request.h"
#include "http_vhost.h"
#include "http_main.h"
#include "http_log.h"
#include "http_connection.h"
#include "util_filter.h"
#include "util_ebcdic.h"
#if APR_HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if APR_HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
/* for proxy_canonenc() */
enum enctype {
enc_path, enc_search, enc_user, enc_fpath, enc_parm
};
#if APR_CHARSET_EBCDIC
#define CRLF "\r\n"
#else /*APR_CHARSET_EBCDIC*/
#define CRLF "\015\012"
#endif /*APR_CHARSET_EBCDIC*/
/* default Max-Forwards header setting */
#define DEFAULT_MAX_FORWARDS 10
/* static information about a remote proxy */
struct proxy_remote {
const char *scheme; /* the schemes handled by this proxy, or '*' */
const char *protocol; /* the scheme used to talk to this proxy */
const char *hostname; /* the hostname of this proxy */
apr_port_t port; /* the port for this proxy */
regex_t *regexp; /* compiled regex (if any) for the remote */
int use_regex; /* simple boolean. True if we have a regex pattern */
};
struct proxy_alias {
const char *real;
const char *fake;
};
struct dirconn_entry {
char *name;
struct in_addr addr, mask;
struct apr_sockaddr_t *hostaddr;
int (*matcher) (struct dirconn_entry * This, request_rec *r);
};
struct noproxy_entry {
const char *name;
struct apr_sockaddr_t *addr;
};
typedef struct {
apr_array_header_t *proxies;
apr_array_header_t *sec_proxy;
apr_array_header_t *aliases;
apr_array_header_t *raliases;
apr_array_header_t *noproxies;
apr_array_header_t *dirconn;
apr_array_header_t *allowed_connect_ports;
const char *domain; /* domain name to use in absence of a domain name in the request */
int req; /* true if proxy requests are enabled */
char req_set;
enum {
via_off,
via_on,
via_block,
via_full
} viaopt; /* how to deal with proxy Via: headers */
char viaopt_set;
apr_size_t recv_buffer_size;
char recv_buffer_size_set;
apr_size_t io_buffer_size;
char io_buffer_size_set;
long maxfwd;
char maxfwd_set;
/**
* the following setting masks the error page
* returned from the 'proxied server' and just
* forwards the status code upwards.
* This allows the main server (us) to generate
* the error page, (so it will look like a error
* returned from the rest of the system
*/
int error_override;
int error_override_set;
int preserve_host;
int preserve_host_set;
apr_interval_time_t timeout;
apr_interval_time_t timeout_set;
enum {
bad_error,
bad_ignore,
bad_body
} badopt; /* how to deal with bad headers */
char badopt_set;
} proxy_server_conf;
typedef struct {
const char *p; /* The path */
int p_is_fnmatch; /* Is this path an fnmatch candidate? */
regex_t *r; /* Is this a regex? */
} proxy_dir_conf;
typedef struct {
conn_rec *connection;
char *hostname;
apr_port_t port;
int is_ssl;
} proxy_conn_rec;
typedef struct {
float cache_completion; /* completion percentage */
int content_length; /* length of the content */
} proxy_completion;
/* hooks */
/* Create a set of PROXY_DECLARE(type), PROXY_DECLARE_NONSTD(type) and
* PROXY_DECLARE_DATA with appropriate export and import tags for the platform
*/
#if !defined(WIN32)
#define PROXY_DECLARE(type) type
#define PROXY_DECLARE_NONSTD(type) type
#define PROXY_DECLARE_DATA
#elif defined(PROXY_DECLARE_STATIC)
#define PROXY_DECLARE(type) type __stdcall
#define PROXY_DECLARE_NONSTD(type) type
#define PROXY_DECLARE_DATA
#elif defined(PROXY_DECLARE_EXPORT)
#define PROXY_DECLARE(type) __declspec(dllexport) type __stdcall
#define PROXY_DECLARE_NONSTD(type) __declspec(dllexport) type
#define PROXY_DECLARE_DATA __declspec(dllexport)
#else
#define PROXY_DECLARE(type) __declspec(dllimport) type __stdcall
#define PROXY_DECLARE_NONSTD(type) __declspec(dllimport) type
#define PROXY_DECLARE_DATA __declspec(dllimport)
#endif
/**
* Hook an optional proxy hook. Unlike static hooks, this uses a macro
* instead of a function.
*/
#define PROXY_OPTIONAL_HOOK(name,fn,pre,succ,order) \
APR_OPTIONAL_HOOK(proxy,name,fn,pre,succ,order)
APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, scheme_handler, (request_rec *r,
proxy_server_conf *conf, char *url,
const char *proxyhost, apr_port_t proxyport))
APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, canon_handler, (request_rec *r,
char *url))
APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, create_req, (request_rec *r, request_rec *pr))
APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, fixups, (request_rec *r))
/* proxy_util.c */
PROXY_DECLARE(request_rec *)ap_proxy_make_fake_req(conn_rec *c, request_rec *r);
PROXY_DECLARE(int) ap_proxy_hex2c(const char *x);
PROXY_DECLARE(void) ap_proxy_c2hex(int ch, char *x);
PROXY_DECLARE(char *)ap_proxy_canonenc(apr_pool_t *p, const char *x, int len, enum enctype t,
int isenc);
PROXY_DECLARE(char *)ap_proxy_canon_netloc(apr_pool_t *p, char **const urlp, char **userp,
char **passwordp, char **hostp, apr_port_t *port);
PROXY_DECLARE(const char *)ap_proxy_date_canon(apr_pool_t *p, const char *x);
PROXY_DECLARE(apr_table_t *)ap_proxy_read_headers(request_rec *r, request_rec *rp, char *buffer, int size, conn_rec *c);
PROXY_DECLARE(int) ap_proxy_liststr(const char *list, const char *val);
PROXY_DECLARE(char *)ap_proxy_removestr(apr_pool_t *pool, const char *list, const char *val);
PROXY_DECLARE(int) ap_proxy_hex2sec(const char *x);
PROXY_DECLARE(void) ap_proxy_sec2hex(int t, char *y);
PROXY_DECLARE(int) ap_proxyerror(request_rec *r, int statuscode, const char *message);
PROXY_DECLARE(int) ap_proxy_is_ipaddr(struct dirconn_entry *This, apr_pool_t *p);
PROXY_DECLARE(int) ap_proxy_is_domainname(struct dirconn_entry *This, apr_pool_t *p);
PROXY_DECLARE(int) ap_proxy_is_hostname(struct dirconn_entry *This, apr_pool_t *p);
PROXY_DECLARE(int) ap_proxy_is_word(struct dirconn_entry *This, apr_pool_t *p);
PROXY_DECLARE(int) ap_proxy_checkproxyblock(request_rec *r, proxy_server_conf *conf, apr_sockaddr_t *uri_addr);
PROXY_DECLARE(int) ap_proxy_pre_http_request(conn_rec *c, request_rec *r);
PROXY_DECLARE(apr_status_t) ap_proxy_string_read(conn_rec *c, apr_bucket_brigade *bb, char *buff, size_t bufflen, int *eos);
PROXY_DECLARE(void) ap_proxy_table_unmerge(apr_pool_t *p, apr_table_t *t, char *key);
PROXY_DECLARE(int) ap_proxy_connect_to_backend(apr_socket_t **, const char *, apr_sockaddr_t *, const char *, proxy_server_conf *, server_rec *, apr_pool_t *);
PROXY_DECLARE(int) ap_proxy_ssl_enable(conn_rec *c);
PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c);
/* For proxy_util */
extern module AP_MODULE_DECLARE_DATA proxy_module;
#endif /*MOD_PROXY_H*/
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