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/* Copyright (c) 2001 Matej Pfajfar.
* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2013, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#ifndef TOR_CONFPARSE_H
#define TOR_CONFPARSE_H
/** Enumeration of types which option values can take */
typedef enum config_type_t {
CONFIG_TYPE_STRING = 0, /**< An arbitrary string. */
CONFIG_TYPE_FILENAME, /**< A filename: some prefixes get expanded. */
CONFIG_TYPE_UINT, /**< A non-negative integer less than MAX_INT */
CONFIG_TYPE_INT, /**< Any integer. */
CONFIG_TYPE_PORT, /**< A port from 1...65535, 0 for "not set", or
* "auto". */
CONFIG_TYPE_INTERVAL, /**< A number of seconds, with optional units*/
CONFIG_TYPE_MSEC_INTERVAL,/**< A number of milliseconds, with optional
* units */
CONFIG_TYPE_MEMUNIT, /**< A number of bytes, with optional units*/
CONFIG_TYPE_DOUBLE, /**< A floating-point value */
CONFIG_TYPE_BOOL, /**< A boolean value, expressed as 0 or 1. */
CONFIG_TYPE_AUTOBOOL, /**< A boolean+auto value, expressed 0 for false,
* 1 for true, and -1 for auto */
CONFIG_TYPE_ISOTIME, /**< An ISO-formatted time relative to UTC. */
CONFIG_TYPE_CSV, /**< A list of strings, separated by commas and
* optional whitespace. */
CONFIG_TYPE_CSV_INTERVAL, /**< A list of strings, separated by commas and
* optional whitespace, representing intervals in
* seconds, with optional units */
CONFIG_TYPE_LINELIST, /**< Uninterpreted config lines */
CONFIG_TYPE_LINELIST_S, /**< Uninterpreted, context-sensitive config lines,
* mixed with other keywords. */
CONFIG_TYPE_LINELIST_V, /**< Catch-all "virtual" option to summarize
* context-sensitive config lines when fetching.
*/
CONFIG_TYPE_ROUTERSET, /**< A list of router names, addrs, and fps,
* parsed into a routerset_t. */
CONFIG_TYPE_OBSOLETE, /**< Obsolete (ignored) option. */
} config_type_t;
/** An abbreviation for a configuration option allowed on the command line. */
typedef struct config_abbrev_t {
const char *abbreviated;
const char *full;
int commandline_only;
int warn;
} config_abbrev_t;
/* Handy macro for declaring "In the config file or on the command line,
* you can abbreviate <b>tok</b>s as <b>tok</b>". */
#define PLURAL(tok) { #tok, #tok "s", 0, 0 }
/** A variable allowed in the configuration file or on the command line. */
typedef struct config_var_t {
const char *name; /**< The full keyword (case insensitive). */
config_type_t type; /**< How to interpret the type and turn it into a
* value. */
off_t var_offset; /**< Offset of the corresponding member of or_options_t. */
const char *initvalue; /**< String (or null) describing initial value. */
} config_var_t;
/** Represents an English description of a configuration variable; used when
* generating configuration file comments. */
typedef struct config_var_description_t {
const char *name;
const char *description;
} config_var_description_t;
/** Type of a callback to validate whether a given configuration is
* well-formed and consistent. See options_trial_assign() for documentation
* of arguments. */
typedef int (*validate_fn_t)(void*,void*,void*,int,char**);
/** Information on the keys, value types, key-to-struct-member mappings,
* variable descriptions, validation functions, and abbreviations for a
* configuration or storage format. */
typedef struct config_format_t {
size_t size; /**< Size of the struct that everything gets parsed into. */
uint32_t magic; /**< Required 'magic value' to make sure we have a struct
* of the right type. */
off_t magic_offset; /**< Offset of the magic value within the struct. */
config_abbrev_t *abbrevs; /**< List of abbreviations that we expand when
* parsing this format. */
config_var_t *vars; /**< List of variables we recognize, their default
* values, and where we stick them in the structure. */
validate_fn_t validate_fn; /**< Function to validate config. */
/** If present, extra is a LINELIST variable for unrecognized
* lines. Otherwise, unrecognized lines are an error. */
config_var_t *extra;
} config_format_t;
/** Macro: assert that <b>cfg</b> has the right magic field for format
* <b>fmt</b>. */
#define CONFIG_CHECK(fmt, cfg) STMT_BEGIN \
tor_assert(fmt && cfg); \
tor_assert((fmt)->magic == \
*(uint32_t*)STRUCT_VAR_P(cfg,fmt->magic_offset)); \
STMT_END
void *config_new(const config_format_t *fmt);
void config_line_append(config_line_t **lst,
const char *key, const char *val);
config_line_t *config_lines_dup(const config_line_t *inp);
const config_line_t *config_line_find(const config_line_t *lines,
const char *key);
void config_free(const config_format_t *fmt, void *options);
int config_lines_eq(config_line_t *a, config_line_t *b);
int config_count_key(const config_line_t *a, const char *key);
config_line_t *config_get_assigned_option(const config_format_t *fmt,
const void *options, const char *key,
int escape_val);
int config_is_same(const config_format_t *fmt,
const void *o1, const void *o2,
const char *name);
void config_init(const config_format_t *fmt, void *options);
void *config_dup(const config_format_t *fmt, const void *old);
char *config_dump(const config_format_t *fmt, const void *default_options,
const void *options, int minimal,
int comment_defaults);
int config_assign(const config_format_t *fmt, void *options,
config_line_t *list,
int use_defaults, int clear_first, char **msg);
config_var_t *config_find_option_mutable(config_format_t *fmt,
const char *key);
const config_var_t *config_find_option(const config_format_t *fmt,
const char *key);
int config_get_lines(const char *string, config_line_t **result, int extended);
void config_free_lines(config_line_t *front);
const char *config_expand_abbrev(const config_format_t *fmt,
const char *option,
int command_line, int warn_obsolete);
#endif
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