421def3c7b0b9ca7762f809a2c57c6ee74495ffaJonathan von Schroeder

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#ifndef MOD_PROXY_H

421def3c7b0b9ca7762f809a2c57c6ee74495ffaJonathan von Schroeder#define MOD_PROXY_H

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_hooks.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_lib.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_strings.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_buckets.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_md5.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_network_io.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_pools.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_strings.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_uri.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_date.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_strmatch.h"

f9096659967df62573bb5a5fd069c41bf5a0eca1Jonathan von Schroeder#include "apr_fnmatch.h"

#include "apr_reslist.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"

#include "ap_provider.h"

#if APR_HAVE_NETINET_IN_H

#include <netinet/in.h>

#endif

#if APR_HAVE_ARPA_INET_H

#include <arpa/inet.h>

#endif

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*/

#define DEFAULT_MAX_FORWARDS -1

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 */

ap_regex_t *regexp; /* compiled regex (if any) for the remote */

int use_regex; /* simple boolean. True if we have a regex pattern */

};

#define PROXYPASS_NOCANON 0x01

#define PROXYPASS_INTERPOLATE 0x02

struct proxy_alias {

const char *real;

const char *fake;

ap_regex_t *regex;

unsigned int flags;

};

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 proxy_balancer proxy_balancer;

typedef struct proxy_worker proxy_worker;

typedef struct proxy_conn_pool proxy_conn_pool;

typedef struct proxy_balancer_method proxy_balancer_method;

typedef struct {

apr_array_header_t *proxies;

apr_array_header_t *sec_proxy;

apr_array_header_t *aliases;

apr_array_header_t *noproxies;

apr_array_header_t *dirconn;

apr_array_header_t *allowed_connect_ports;

apr_array_header_t *workers;

apr_array_header_t *balancers;

proxy_worker *forward; /* forward proxy worker */

proxy_worker *reverse; /* reverse "module-driven" proxy worker */

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;

/**

int error_override;

int error_override_set;

int preserve_host;

int preserve_host_set;

apr_interval_time_t timeout;

char timeout_set;

enum {

bad_error,

bad_ignore,

bad_body

} badopt; /* how to deal with bad headers */

char badopt_set;

enum {

status_off,

status_on,

status_full

} proxy_status; /* Status display options */

char proxy_status_set;

apr_pool_t *pool; /* Pool used for allocating this struct */

} proxy_server_conf;

typedef struct {

const char *p; /* The path */

int p_is_fnmatch; /* Is this path an fnmatch candidate? */

ap_regex_t *r; /* Is this a regex? */

apr_array_header_t *raliases;

apr_array_header_t* cookie_paths;

apr_array_header_t* cookie_domains;

const apr_strmatch_pattern* cookie_path_str;

const apr_strmatch_pattern* cookie_domain_str;

const char *ftp_directory_charset;

int interpolate_env;

} proxy_dir_conf;

typedef struct {

apr_array_header_t *raliases;

apr_array_header_t* cookie_paths;

apr_array_header_t* cookie_domains;

} proxy_req_conf;

typedef struct {

conn_rec *connection;

const char *hostname;

apr_port_t port;

int is_ssl;

apr_pool_t *pool; /* Subpool for hostname and addr data */

apr_socket_t *sock; /* Connection socket */

apr_sockaddr_t *addr; /* Preparsed remote address info */

apr_uint32_t flags; /* Conection flags */

int close; /* Close 'this' connection */

proxy_worker *worker; /* Connection pool this connection belongs to */

void *data; /* per scheme connection data */

#if APR_HAS_THREADS

int inreslist; /* connection in apr_reslist? */

#endif

apr_pool_t *scpool; /* Subpool used for socket and connection data */

request_rec *r; /* Request record of the frontend request

int need_flush;/* Flag to decide whether we need to flush the

} proxy_conn_rec;

typedef struct {

float cache_completion; /* completion percentage */

int content_length; /* length of the content */

} proxy_completion;

struct proxy_conn_pool {

apr_pool_t *pool; /* The pool used in constructor and destructor calls */

apr_sockaddr_t *addr; /* Preparsed remote address info */

#if APR_HAS_THREADS

apr_reslist_t *res; /* Connection resource list */

#endif

proxy_conn_rec *conn; /* Single connection for prefork mpm's */

};

#define PROXY_WORKER_INITIALIZED 0x0001

#define PROXY_WORKER_IGNORE_ERRORS 0x0002

#define PROXY_WORKER_IN_SHUTDOWN 0x0010

#define PROXY_WORKER_DISABLED 0x0020

#define PROXY_WORKER_STOPPED 0x0040

#define PROXY_WORKER_IN_ERROR 0x0080

#define PROXY_WORKER_HOT_STANDBY 0x0100

#define PROXY_WORKER_NOT_USABLE_BITMAP ( PROXY_WORKER_IN_SHUTDOWN | \

PROXY_WORKER_DISABLED | PROXY_WORKER_STOPPED | PROXY_WORKER_IN_ERROR )

#define PROXY_WORKER_IS_INITIALIZED(f) ( (f)->s && \

( (f)->s->status & PROXY_WORKER_INITIALIZED ) )

#define PROXY_WORKER_IS_STANDBY(f) ( (f)->s && \

( (f)->s->status & PROXY_WORKER_HOT_STANDBY ) )

#define PROXY_WORKER_IS_USABLE(f) ( (f)->s && \

( !( (f)->s->status & PROXY_WORKER_NOT_USABLE_BITMAP) ) && \

PROXY_WORKER_IS_INITIALIZED(f) )

#define PROXY_WORKER_DEFAULT_RETRY 60

#define PROXY_WORKER_MAX_ROUTE_SIZ 63

typedef struct {

int status;

apr_time_t error_time; /* time of the last error */

int retries; /* number of retries on this worker */

int lbstatus; /* Current lbstatus */

int lbfactor; /* dynamic lbfactor */

apr_off_t transferred;/* Number of bytes transferred to remote */

apr_off_t read; /* Number of bytes read from remote */

apr_size_t elected; /* Number of times the worker was elected */

char route[PROXY_WORKER_MAX_ROUTE_SIZ+1];

char redirect[PROXY_WORKER_MAX_ROUTE_SIZ+1];

void *context; /* general purpose storage */

apr_size_t busy; /* busyness factor */

int lbset; /* load balancer cluster set */

} proxy_worker_stat;

struct proxy_worker {

int id; /* scoreboard id */

apr_interval_time_t retry; /* retry interval */

int lbfactor; /* initial load balancing factor */

const char *name;

const char *scheme; /* scheme to use ajp|http|https */

const char *hostname; /* remote backend address */

const char *route; /* balancing route */

const char *redirect; /* temporary balancing redirection route */

int status; /* temporary worker status */

apr_port_t port;

int min; /* Desired minimum number of available connections */

int smax; /* Soft maximum on the total number of connections */

int hmax; /* Hard maximum on the total number of connections */

apr_interval_time_t ttl; /* maximum amount of time in seconds a connection

apr_interval_time_t timeout; /* connection timeout */

char timeout_set;

apr_interval_time_t acquire; /* acquire timeout when the maximum number of connections is exceeded */

char acquire_set;

apr_size_t recv_buffer_size;

char recv_buffer_size_set;

apr_size_t io_buffer_size;

char io_buffer_size_set;

char keepalive;

char keepalive_set;

proxy_conn_pool *cp; /* Connection pool to use */

proxy_worker_stat *s; /* Shared data */

void *opaque; /* per scheme worker data */

int is_address_reusable;

#if APR_HAS_THREADS

apr_thread_mutex_t *mutex; /* Thread lock for updating address cache */

#endif

void *context; /* general purpose storage */

enum {

flush_off,

flush_on,

flush_auto

} flush_packets; /* control AJP flushing */

int flush_wait; /* poll wait time in microseconds if flush_auto */

apr_interval_time_t ping_timeout;

char ping_timeout_set;

int lbset; /* load balancer cluster set */

char retry_set;

char disablereuse;

char disablereuse_set;

};

#define PROXY_FLUSH_WAIT 10000

struct proxy_balancer {

apr_array_header_t *workers; /* array of proxy_workers */

const char *name; /* name of the load balancer */

const char *sticky; /* sticky session identifier */

int sticky_force; /* Disable failover for sticky sessions */

apr_interval_time_t timeout; /* Timeout for waiting on free connection */

int max_attempts; /* Number of attempts before failing */

char max_attempts_set;

proxy_balancer_method *lbmethod;

/* XXX: Perhaps we will need the proc mutex too.

#if APR_HAS_THREADS

apr_thread_mutex_t *mutex; /* Thread lock for updating lb params */

#endif

void *context; /* general purpose storage */

const char *sticky_path; /* URL sticky session identifier */

};

struct proxy_balancer_method {

const char *name; /* name of the load balancer method*/

proxy_worker *(*finder)(proxy_balancer *balancer,

request_rec *r);

void *context; /* general purpose storage */

};

#if APR_HAS_THREADS

#define PROXY_THREAD_LOCK(x) apr_thread_mutex_lock((x)->mutex)

#define PROXY_THREAD_UNLOCK(x) apr_thread_mutex_unlock((x)->mutex)

#else

#define PROXY_THREAD_LOCK(x) APR_SUCCESS

#define PROXY_THREAD_UNLOCK(x) APR_SUCCESS

#endif

#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

#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_worker *worker, 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))

APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, pre_request, (proxy_worker **worker,

proxy_balancer **balancer,

request_rec *r,

proxy_server_conf *conf, char **url))

APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, post_request, (proxy_worker *worker,

proxy_balancer *balancer, request_rec *r,

proxy_server_conf *conf))

APR_DECLARE_EXTERNAL_HOOK(proxy, PROXY, int, request_status,

(int *status, request_rec *r))

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 forcedec, int proxyreq);

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(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(apr_status_t) ap_proxy_ssl_connection_cleanup(proxy_conn_rec *conn,

request_rec *r);

PROXY_DECLARE(int) ap_proxy_ssl_enable(conn_rec *c);

PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c);

PROXY_DECLARE(int) ap_proxy_conn_is_https(conn_rec *c);

PROXY_DECLARE(const char *) ap_proxy_ssl_val(apr_pool_t *p, server_rec *s, conn_rec *c, request_rec *r, const char *var);

PROXY_DECLARE(const char *) ap_proxy_location_reverse_map(request_rec *r, proxy_dir_conf *conf, const char *url);

PROXY_DECLARE(const char *) ap_proxy_cookie_reverse_map(request_rec *r, proxy_dir_conf *conf, const char *str);

#if !defined(WIN32)

typedef const char *(*ap_proxy_header_reverse_map_fn)(request_rec *,

proxy_dir_conf *, const char *);

#elif defined(PROXY_DECLARE_STATIC)

typedef const char *(__stdcall *ap_proxy_header_reverse_map_fn)(request_rec *,

proxy_dir_conf *, const char *);

#elif defined(PROXY_DECLARE_EXPORT)

typedef __declspec(dllexport) const char *

(__stdcall *ap_proxy_header_reverse_map_fn)(request_rec *,

proxy_dir_conf *, const char *);

#else

typedef __declspec(dllimport) const char *

(__stdcall *ap_proxy_header_reverse_map_fn)(request_rec *,

proxy_dir_conf *, const char *);

#endif

PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p,

proxy_server_conf *conf,

const char *url);

PROXY_DECLARE(const char *) ap_proxy_add_worker(proxy_worker **worker,

apr_pool_t *p,

proxy_server_conf *conf,

const char *url);

PROXY_DECLARE(proxy_worker *) ap_proxy_create_worker(apr_pool_t *p);

PROXY_DECLARE(void) ap_proxy_initialize_worker_share(proxy_server_conf *conf,

proxy_worker *worker,

server_rec *s);

PROXY_DECLARE(apr_status_t) ap_proxy_initialize_worker(proxy_worker *worker,

server_rec *s);

PROXY_DECLARE(proxy_balancer *) ap_proxy_get_balancer(apr_pool_t *p,

proxy_server_conf *conf,

const char *url);

PROXY_DECLARE(const char *) ap_proxy_add_balancer(proxy_balancer **balancer,

apr_pool_t *p,

proxy_server_conf *conf,

const char *url);

PROXY_DECLARE(void) ap_proxy_add_worker_to_balancer(apr_pool_t *pool,

proxy_balancer *balancer,

proxy_worker *worker);

PROXY_DECLARE(int) ap_proxy_pre_request(proxy_worker **worker,

proxy_balancer **balancer,

request_rec *r,

proxy_server_conf *conf,

char **url);

PROXY_DECLARE(int) ap_proxy_post_request(proxy_worker *worker,

proxy_balancer *balancer,

request_rec *r,

proxy_server_conf *conf);

PROXY_DECLARE(int) ap_proxy_request_status(int *status, request_rec *r);

PROXY_DECLARE(int) ap_proxy_determine_connection(apr_pool_t *p, request_rec *r,

proxy_server_conf *conf,

proxy_worker *worker,

proxy_conn_rec *conn,

apr_uri_t *uri,

char **url,

const char *proxyname,

apr_port_t proxyport,

char *server_portstr,

int server_portstr_size);

PROXY_DECLARE(int) ap_proxy_retry_worker(const char *proxy_function,

proxy_worker *worker,

server_rec *s);

PROXY_DECLARE(int) ap_proxy_acquire_connection(const char *proxy_function,

proxy_conn_rec **conn,

proxy_worker *worker,

server_rec *s);

PROXY_DECLARE(int) ap_proxy_release_connection(const char *proxy_function,

proxy_conn_rec *conn,

server_rec *s);

PROXY_DECLARE(int) ap_proxy_connect_backend(const char *proxy_function,

proxy_conn_rec *conn,

proxy_worker *worker,

server_rec *s);

PROXY_DECLARE(int) ap_proxy_connection_create(const char *proxy_function,

proxy_conn_rec *conn,

conn_rec *c, server_rec *s);

PROXY_DECLARE(void) ap_proxy_backend_broke(request_rec *r,

apr_bucket_brigade *brigade);

#define PROXY_LBMETHOD "proxylbmethod"

#define PROXY_DYNAMIC_BALANCER_LIMIT 16

int ap_proxy_lb_workers(void);

extern module PROXY_DECLARE_DATA proxy_module;

extern int PROXY_DECLARE_DATA proxy_lb_workers;

#endif /*MOD_PROXY_H*/