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a688f06b19
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102618 13f79535-47bb-0310-9956-ffa450edef68
254 lines
8.3 KiB
C
254 lines
8.3 KiB
C
/* Copyright 1999-2004 The Apache Software Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MOD_PROXY_H
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#define MOD_PROXY_H
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/*
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* Main include file for the Apache proxy
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*/
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/*
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Also note numerous FIXMEs and CHECKMEs which should be eliminated.
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This code is once again experimental!
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Things to do:
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1. Make it completely work (for FTP too)
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2. HTTP/1.1
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Chuck Murcko <chuck@topsail.org> 02-06-01
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*/
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#define CORE_PRIVATE
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#include "apr_hooks.h"
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#include "apr.h"
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#include "apr_lib.h"
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#include "apr_strings.h"
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#include "apr_buckets.h"
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#include "apr_md5.h"
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#include "apr_network_io.h"
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#include "apr_pools.h"
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#include "apr_strings.h"
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#include "apr_uri.h"
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#include "apr_date.h"
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#include "apr_fnmatch.h"
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#define APR_WANT_STRFUNC
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#include "apr_want.h"
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#include "httpd.h"
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#include "http_config.h"
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#include "ap_config.h"
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#include "http_core.h"
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#include "http_protocol.h"
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#include "http_request.h"
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#include "http_vhost.h"
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#include "http_main.h"
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#include "http_log.h"
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#include "http_connection.h"
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#include "util_filter.h"
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#include "util_ebcdic.h"
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#if APR_HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#if APR_HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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/* for proxy_canonenc() */
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enum enctype {
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enc_path, enc_search, enc_user, enc_fpath, enc_parm
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};
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#if APR_CHARSET_EBCDIC
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#define CRLF "\r\n"
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#else /*APR_CHARSET_EBCDIC*/
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#define CRLF "\015\012"
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#endif /*APR_CHARSET_EBCDIC*/
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/* default Max-Forwards header setting */
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#define DEFAULT_MAX_FORWARDS 10
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/* static information about a remote proxy */
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struct proxy_remote {
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const char *scheme; /* the schemes handled by this proxy, or '*' */
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const char *protocol; /* the scheme used to talk to this proxy */
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const char *hostname; /* the hostname of this proxy */
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apr_port_t port; /* the port for this proxy */
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regex_t *regexp; /* compiled regex (if any) for the remote */
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int use_regex; /* simple boolean. True if we have a regex pattern */
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};
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struct proxy_alias {
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const char *real;
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const char *fake;
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};
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struct dirconn_entry {
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char *name;
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struct in_addr addr, mask;
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struct apr_sockaddr_t *hostaddr;
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int (*matcher) (struct dirconn_entry * This, request_rec *r);
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};
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struct noproxy_entry {
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const char *name;
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struct apr_sockaddr_t *addr;
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};
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typedef struct {
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apr_array_header_t *proxies;
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apr_array_header_t *sec_proxy;
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apr_array_header_t *aliases;
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apr_array_header_t *raliases;
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apr_array_header_t *noproxies;
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apr_array_header_t *dirconn;
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apr_array_header_t *allowed_connect_ports;
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const char *domain; /* domain name to use in absence of a domain name in the request */
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int req; /* true if proxy requests are enabled */
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char req_set;
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enum {
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via_off,
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via_on,
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via_block,
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via_full
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} viaopt; /* how to deal with proxy Via: headers */
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char viaopt_set;
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apr_size_t recv_buffer_size;
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char recv_buffer_size_set;
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apr_size_t io_buffer_size;
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char io_buffer_size_set;
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long maxfwd;
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char maxfwd_set;
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/**
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* the following setting masks the error page
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* returned from the 'proxied server' and just
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* forwards the status code upwards.
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* This allows the main server (us) to generate
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* the error page, (so it will look like a error
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* returned from the rest of the system
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*/
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int error_override;
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int error_override_set;
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int preserve_host;
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int preserve_host_set;
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apr_interval_time_t timeout;
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apr_interval_time_t timeout_set;
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enum {
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bad_error,
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bad_ignore,
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bad_body
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} badopt; /* how to deal with bad headers */
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char badopt_set;
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} proxy_server_conf;
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typedef struct {
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const char *p; /* The path */
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int p_is_fnmatch; /* Is this path an fnmatch candidate? */
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regex_t *r; /* Is this a regex? */
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} proxy_dir_conf;
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typedef struct {
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conn_rec *connection;
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char *hostname;
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apr_port_t port;
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int is_ssl;
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} proxy_conn_rec;
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typedef struct {
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float cache_completion; /* completion percentage */
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int content_length; /* length of the content */
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} proxy_completion;
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/* hooks */
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/* Create a set of PROXY_DECLARE(type), PROXY_DECLARE_NONSTD(type) and
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* PROXY_DECLARE_DATA with appropriate export and import tags for the platform
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*/
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#if !defined(WIN32)
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#define PROXY_DECLARE(type) type
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#define PROXY_DECLARE_NONSTD(type) type
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#define PROXY_DECLARE_DATA
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#elif defined(PROXY_DECLARE_STATIC)
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#define PROXY_DECLARE(type) type __stdcall
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#define PROXY_DECLARE_NONSTD(type) type
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#define PROXY_DECLARE_DATA
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#elif defined(PROXY_DECLARE_EXPORT)
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#define PROXY_DECLARE(type) __declspec(dllexport) type __stdcall
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#define PROXY_DECLARE_NONSTD(type) __declspec(dllexport) type
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#define PROXY_DECLARE_DATA __declspec(dllexport)
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#else
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#define PROXY_DECLARE(type) __declspec(dllimport) type __stdcall
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#define PROXY_DECLARE_NONSTD(type) __declspec(dllimport) type
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#define PROXY_DECLARE_DATA __declspec(dllimport)
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#endif
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/**
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* Hook an optional proxy hook. Unlike static hooks, this uses a macro
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* instead of a function.
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*/
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#define PROXY_OPTIONAL_HOOK(name,fn,pre,succ,order) \
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APR_OPTIONAL_HOOK(proxy,name,fn,pre,succ,order)
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APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, scheme_handler, (request_rec *r,
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proxy_server_conf *conf, char *url,
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const char *proxyhost, apr_port_t proxyport))
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APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, canon_handler, (request_rec *r,
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char *url))
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APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, create_req, (request_rec *r, request_rec *pr))
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APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, fixups, (request_rec *r))
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/* proxy_util.c */
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PROXY_DECLARE(request_rec *)ap_proxy_make_fake_req(conn_rec *c, request_rec *r);
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PROXY_DECLARE(int) ap_proxy_hex2c(const char *x);
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PROXY_DECLARE(void) ap_proxy_c2hex(int ch, char *x);
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PROXY_DECLARE(char *)ap_proxy_canonenc(apr_pool_t *p, const char *x, int len, enum enctype t,
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int isenc);
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PROXY_DECLARE(char *)ap_proxy_canon_netloc(apr_pool_t *p, char **const urlp, char **userp,
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char **passwordp, char **hostp, apr_port_t *port);
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PROXY_DECLARE(const char *)ap_proxy_date_canon(apr_pool_t *p, const char *x);
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PROXY_DECLARE(apr_table_t *)ap_proxy_read_headers(request_rec *r, request_rec *rp, char *buffer, int size, conn_rec *c);
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PROXY_DECLARE(int) ap_proxy_liststr(const char *list, const char *val);
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PROXY_DECLARE(char *)ap_proxy_removestr(apr_pool_t *pool, const char *list, const char *val);
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PROXY_DECLARE(int) ap_proxy_hex2sec(const char *x);
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PROXY_DECLARE(void) ap_proxy_sec2hex(int t, char *y);
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PROXY_DECLARE(int) ap_proxyerror(request_rec *r, int statuscode, const char *message);
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PROXY_DECLARE(int) ap_proxy_is_ipaddr(struct dirconn_entry *This, apr_pool_t *p);
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PROXY_DECLARE(int) ap_proxy_is_domainname(struct dirconn_entry *This, apr_pool_t *p);
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PROXY_DECLARE(int) ap_proxy_is_hostname(struct dirconn_entry *This, apr_pool_t *p);
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PROXY_DECLARE(int) ap_proxy_is_word(struct dirconn_entry *This, apr_pool_t *p);
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PROXY_DECLARE(int) ap_proxy_checkproxyblock(request_rec *r, proxy_server_conf *conf, apr_sockaddr_t *uri_addr);
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PROXY_DECLARE(int) ap_proxy_pre_http_request(conn_rec *c, request_rec *r);
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PROXY_DECLARE(apr_status_t) ap_proxy_string_read(conn_rec *c, apr_bucket_brigade *bb, char *buff, size_t bufflen, int *eos);
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PROXY_DECLARE(void) ap_proxy_table_unmerge(apr_pool_t *p, apr_table_t *t, char *key);
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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 *);
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PROXY_DECLARE(int) ap_proxy_ssl_enable(conn_rec *c);
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PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c);
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/* For proxy_util */
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extern module AP_MODULE_DECLARE_DATA proxy_module;
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#endif /*MOD_PROXY_H*/
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