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/* ====================================================================
* Copyright (c) 1995-1997 The Apache Group. 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. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission.
*
* 5. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``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 GROUP 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 Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
/*
* The central data structures around here...
*/
/* Command dispatch structures... */
enum cmd_how {
RAW_ARGS, /* cmd_func parses command line itself */
TAKE1, /* one argument only */
TAKE2, /* two arguments only */
ITERATE, /* one argument, occuring multiple times
* (e.g., IndexIgnore)
*/
ITERATE2, /* two arguments, 2nd occurs multiple times
* (e.g., AddIcon)
*/
FLAG, /* One of 'On' or 'Off' */
NO_ARGS, /* No args at all, e.g. </Directory> */
TAKE12, /* one or two arguments */
TAKE3, /* three arguments only */
TAKE23, /* two or three arguments */
TAKE123, /* one, two or three arguments */
TAKE13 /* one or three arguments */
};
typedef struct command_struct {
char *name; /* Name of this command */
const char *(*func)(); /* Function invoked */
void *cmd_data; /* Extra data, for functions which
* implement multiple commands...
*/
int req_override; /* What overrides need to be allowed to
* enable this command.
*/
enum cmd_how args_how; /* What the command expects as arguments */
char *errmsg; /* 'usage' message, in case of syntax errors */
} command_rec;
/* The allowed locations for a configuration directive are the union of
* those indicated by each set bit in the req_override mask.
*
* (req_override & RSRC_CONF) => *.conf outside <Directory> or <Location>
* (req_override & ACCESS_CONF) => *.conf inside <Directory> or <Location>
* (req_override & OR_AUTHCFG) => *.conf inside <Directory> or <Location>
* and .htaccess when AllowOverride AuthConfig
* (req_override & OR_LIMIT) => *.conf inside <Directory> or <Location>
* and .htaccess when AllowOverride Limit
* (req_override & OR_OPTIONS) => *.conf anywhere
* and .htaccess when AllowOverride Options
* (req_override & OR_FILEINFO) => *.conf anywhere
* and .htaccess when AllowOverride FileInfo
* (req_override & OR_INDEXES) => *.conf anywhere
* and .htaccess when AllowOverride Indexes
*/
#define OR_NONE 0
#define OR_LIMIT 1
#define OR_OPTIONS 2
#define OR_FILEINFO 4
#define OR_AUTHCFG 8
#define OR_INDEXES 16
#define OR_UNSET 32
#define ACCESS_CONF 64
#define RSRC_CONF 128
#define OR_ALL (OR_LIMIT|OR_OPTIONS|OR_FILEINFO|OR_AUTHCFG|OR_INDEXES)
/* This can be returned by a function if they don't wish to handle
* a command. Make it something not likely someone will actually use
* as an error code.
*/
#define DECLINE_CMD "\a\b"
/*
* This structure is passed to a command which is being invoked,
* to carry a large variety of miscellaneous data which is all of
* use to *somebody*...
*/
typedef struct {
void *info; /* Argument to command from cmd_table */
int override; /* Which allow-override bits are set */
int limited; /* Which methods are <Limit>ed */
char *config_file; /* Filename cmd read from */
int config_line; /* Line cmd read from */
FILE *infile; /* fd for more lines (not currently used) */
pool *pool; /* Pool to allocate new storage in */
pool *temp_pool; /* Pool for scratch memory; persists during
* configuration, but wiped before the first
* request is served...
*/
server_rec *server; /* Server_rec being configured for */
char *path; /* If configuring for a directory,
* pathname of that directory.
*/
const command_rec *cmd; /* configuration command */
} cmd_parms;
/* This structure records the existence of handlers in a module... */
typedef struct {
char *content_type;
int (*handler) (request_rec *);
} handler_rec;
/*
* Module structures. Just about everything is dispatched through
* these, directly or indirectly (through the command and handler
* tables).
*/
typedef struct module_struct {
int version; /* API version, *not* module version;
* check that module is compatible with this
* version of the server.
*/
int module_index; /* Index to this modules structures in
* config vectors.
*/
const char *name;
struct module_struct *next;
#ifdef ULTRIX_BRAIN_DEATH
void (*init)();
void *(*create_dir_config)();
void *(*merge_dir_config)();
void *(*create_server_config)();
void *(*merge_server_config)();
#else
void (*init)(server_rec *, pool *);
void *(*create_dir_config)(pool *p, char *dir);
void *(*merge_dir_config)(pool *p, void *base_conf, void *new_conf);
void *(*create_server_config)(pool *p, server_rec *s);
void *(*merge_server_config)(pool *p, void *base_conf, void *new_conf);
#endif
command_rec *cmds;
handler_rec *handlers;
/* Hooks for getting into the middle of server ops...
*
* translate_handler --- translate URI to filename
* access_checker --- check access by host address, etc. All of these
* run; if all decline, that's still OK.
* check_user_id --- get and validate user id from the HTTP request
* auth_checker --- see if the user (from check_user_id) is OK *here*.
* If all of *these* decline, the request is rejected
* (as a SERVER_ERROR, since the module which was
* supposed to handle this was configured wrong).
* type_checker --- Determine MIME type of the requested entity;
* sets content_type, _encoding and _language fields.
* logger --- log a transaction. Not supported yet out of sheer
* laziness on my part.
*/
int (*translate_handler)(request_rec *);
int (*check_user_id)(request_rec *);
int (*auth_checker)(request_rec *);
int (*access_checker)(request_rec *);
int (*type_checker)(request_rec *);
int (*fixer_upper)(request_rec *);
int (*logger)(request_rec *);
int (*header_parser)(request_rec *);
/* Regardless of the model the server uses for managing "units of
* execution", i.e. multi-process, multi-threaded, hybrids of those,
* there is the concept of a "heavy weight process". That is, a
* process with its own memory space, file spaces, etc. This method,
* child_init, is called once for each heavy-weight process before
* any requests are served. Note that no provision is made yet for
* initialization per light-weight process (i.e. thread). The
* parameters passed here are the same as those passed to the global
* init method above.
*/
#ifdef ULTRIX_BRAIN_DEATH
void (*child_init)();
#else
void (*child_init)(server_rec *, pool *);
#endif
} module;
/* Initializer for the first few module slots, which are only
* really set up once we start running. Note that the first word
* is a version check; this should allow us to deal with changes to
* the API (the server can detect an old-format module, and either
* handle it back-compatibly, or at least signal an error).
*/
#define MODULE_MAGIC_NUMBER 19970719
#define STANDARD_MODULE_STUFF MODULE_MAGIC_NUMBER, -1, __FILE__, NULL
/* Generic accessors for other modules to get at their own module-specific
* data
*/
API_EXPORT(void *) get_module_config (void *conf_vector, module *m);
API_EXPORT(void) set_module_config (void *conf_vector, module *m, void *val);
/* Generic command handling function... */
API_EXPORT_NONSTD(const char *) set_string_slot (cmd_parms *, char *, char *);
API_EXPORT_NONSTD(const char *) set_flag_slot (cmd_parms *, char *, int);
/* For modules which need to read config files, open logs, etc. ...
* this returns the fname argument if it begins with '/'; otherwise
* it relativizes it wrt server_root.
*/
API_EXPORT(char *) server_root_relative (pool *p, char *fname);
/* Finally, the hook for dynamically loading modules in... */
API_EXPORT(void) add_module (module *m);
API_EXPORT(int) add_named_module (const char *name);
API_EXPORT(void) clear_module_list (void);
API_EXPORT(const char *) find_module_name (module *m);
API_EXPORT(module *) find_linked_module (const char *name);
#ifdef CORE_PRIVATE
extern module *prelinked_modules[];
extern module *preloaded_modules[];
/* For http_main.c... */
server_rec *read_config (pool *conf_pool, pool *temp_pool, char *config_name);
void init_modules(pool *p, server_rec *s);
void child_init_modules(pool *p, server_rec *s);
void setup_prelinked_modules(void);
void show_directives(void);
void show_modules(void);
/* For http_request.c... */
void *create_request_config (pool *p);
void *create_per_dir_config (pool *p);
void *merge_per_dir_configs (pool *p, void *base, void *new);
/* For http_core.c... (<Directory> command and virtual hosts) */
int parse_htaccess(void **result, request_rec *r, int override,
char *path, const char *access_name);
const char *srm_command_loop (cmd_parms *parms, void *config);
server_rec *init_virtual_host (pool *p, const char *hostname, server_rec *main_server);
int is_virtual_server (server_rec *);
void process_resource_config(server_rec *s, char *fname, pool *p, pool *ptemp);
/* Module-method dispatchers, also for http_request.c */
int translate_name (request_rec *);
int directory_walk (request_rec *); /* check symlinks, get per-dir config */
int check_access (request_rec *); /* check access on non-auth basis */
int check_user_id (request_rec *); /* obtain valid username from client auth */
int check_auth (request_rec *); /* check (validated) user is authorized here */
int find_types (request_rec *); /* identify MIME type */
int run_fixups (request_rec *); /* poke around for other metainfo, etc.... */
int invoke_handler (request_rec *);
int log_transaction (request_rec *r);
int header_parse (request_rec *);
#endif
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