Improve documentation of api v3

The documentation is improved to reflect the new version.

Tune the options

Change-Id: I894c3db3bc0c10e89db66a9a51a9ad049bb8c0c4
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 7 insertions, 850 deletions

diff --git a/docs/afb-binding-references.md b/docs/afb-binding-references.md
index 4ff0f042..e4f84d8d 100644
--- a/docs/afb-binding-references.md
+++ b/docs/afb-binding-references.md
@@ -1,853 +1,10 @@
 # Binding Reference
 
-## Structure for declaring binding
 
-### afb_binding_t
-
-The main structure, of type **afb_binding_t**, for describing the binding
-must be exported under the name **afbBindingExport**.
-
-This structure is defined as below.
-
-```C
-typedef struct afb_binding_v3 afb_binding_t;
-```
-
-Where:
-
-```C
-/**
- * Description of the bindings of type version 3
- */
-struct afb_binding_v3
-{
-	/** api name for the binding, can't be NULL */
-	const char *api;
-
-	/** textual specification of the binding, can be NULL */
-	const char *specification;
-
-	/** some info about the api, can be NULL */
-	const char *info;
-
-	/** array of descriptions of verbs terminated by a NULL name, can be NULL */
-	const struct afb_verb_v3 *verbs;
-
-	/** callback at load of the binding */
-	int (*preinit)(struct afb_api_x3 *api);
-
-	/** callback for starting the service */
-	int (*init)(struct afb_api_x3 *api);
-
-	/** callback for handling events */
-	void (*onevent)(struct afb_api_x3 *api, const char *event, struct json_object *object);
-
-	/** userdata for afb_api_x3 */
-	void *userdata;
-
-	/** space separated list of provided class(es) */
-	const char *provide_class;
-
-	/** space separated list of required class(es) */
-	const char *require_class;
-
-	/** space separated list of required API(es) */
-	const char *require_api;
-
-	/** avoids concurrent requests to verbs */
-	unsigned noconcurrency: 1;
-};
-```
-
-### struct afb_verb_t
-
-Each verb is described with a structure of type **afb_verb_t**
-defined below:
-
-```C
-typedef struct afb_verb_v3 afb_verb_t;
-```
-
-```C
-/**
- * Description of one verb as provided for binding API version 3
- */
-struct afb_verb_v3
-{
-	/** name of the verb, NULL only at end of the array */
-	const char *verb;
-
-	/** callback function implementing the verb */
-	void (*callback)(afb_req_t_x2 *req);
-
-	/** required authorization, can be NULL */
-	const struct afb_auth *auth;
-
-	/** some info about the verb, can be NULL */
-	const char *info;
-
-	/**< data for the verb callback */
-	void *vcbdata;
-
-	/** authorization and session requirements of the verb */
-	uint16_t session;
-
-	/** is the verb glob name */
-	uint16_t glob: 1;
-};
-```
-
-The **session** flags is one of the constant defined below:
-
-- AFB_SESSION_NONE : no flag, synonym to 0
-- AFB_SESSION_LOA_0 : Requires the LOA to be 0 or more, synonym to 0 or AFB_SESSION_NONE
-- AFB_SESSION_LOA_1 : Requires the LOA to be 1 or more
-- AFB_SESSION_LOA_2 : Requires the LOA to be 2 or more
-- AFB_SESSION_LOA_3 : Requires the LOA to be 3 or more
-- AFB_SESSION_CHECK : Requires the token to be set and valid
-- AFB_SESSION_REFRESH : Implies a token refresh
-- AFB_SESSION_CLOSE : Implies closing the session after request processed
-
-The LOA (Level Of Assurance) is set, by binding api, using the function **afb_req_session_set_LOA**.
-
-The session can be closed, by binding api, using the function **afb_req_session_close**.
-
-### afb_auth_t and afb_auth_type_t
-
-The structure **afb_auth_t** is used within verb description to
-set security requirements.  
-The interpretation of the structure depends on the value of the field **type**.
-
-```C
-typedef struct afb_auth afb_auth_t;
-
-/**
- * Definition of an authorization entry
- */
-struct afb_auth
-{
-	/** type of entry @see afb_auth_type */
-	enum afb_auth_type type;
-	
-	union {
-		/** text when @ref type == @ref afb_auth_Permission */
-		const char *text;
-		
-		/** level of assurancy when @ref type ==  @ref afb_auth_LOA */
-		unsigned loa;
-		
-		/** first child when @ref type in { @ref afb_auth_Or, @ref afb_auth_And, @ref afb_auth_Not } */
-		const struct afb_auth *first;
-	};
-	
-	/** second child when @ref type in { @ref afb_auth_Or, @ref afb_auth_And } */
-	const struct afb_auth *next;
-};
-
-```
-
-The possible values for **type** is defined here:
-
-```C
-typedef enum afb_auth_type afb_auth_type_t;
-
-/**
- * Enumeration  for authority (Session/Token/Assurance) definitions.
- *
- * @see afb_auth
- */
-enum afb_auth_type
-{
-	/** never authorized, no data */
-	afb_auth_No = 0,
-
-	/** authorized if token valid, no data */
-	afb_auth_Token,
-
-	/** authorized if LOA greater than data 'loa' */
-	afb_auth_LOA,
-
-	/** authorized if permission 'text' is granted */
-	afb_auth_Permission,
-
-	/** authorized if 'first' or 'next' is authorized */
-	afb_auth_Or,
-
-	/** authorized if 'first' and 'next' are authorized */
-	afb_auth_And,
-
-	/** authorized if 'first' is not authorized */
-	afb_auth_Not,
-
-	/** always authorized, no data */
-	afb_auth_Yes
-};
-```
-
-Example:
-
-```C
-static const afb_auth_t myauth[] = {
-    { .type = afb_auth_Permission, .text = "urn:AGL:permission:me:public:set" },
-    { .type = afb_auth_Permission, .text = "urn:AGL:permission:me:public:get" },
-    { .type = afb_auth_Or, .first = &myauth[1], .next = &myauth[0] }
-};
-```
-
-## Functions of class afb_daemon
-
-The 3 following functions are linked to libsystemd.  
-They allow use of **sd_event** features and access
-to **sd_bus** features.
-
-```C
-/*
- * Retrieves the common systemd's event loop of AFB 
- * 
- */
-struct sd_event *afb_daemon_get_event_loop();
-
-/*
- * Retrieves the common systemd's user/session d-bus of AFB if active
- */
-struct sd_bus *afb_daemon_get_user_bus();
-
-/*
- * Retrieves the common systemd's system d-bus of AFB if active or NULL
- */
-struct sd_bus *afb_daemon_get_system_bus();
-```
-
-The 2 following functions are linked to event management.  
-Broadcasting an event send it to any possible listener.
-
-```C
-/*
- * Broadcasts widely the event of 'name' with the data 'object'.
- * 'object' can be NULL.
- *
- * For convenience, the function calls 'json_object_put' for 'object'.
- * Thus, in the case where 'object' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * Calling this function is only forbidden during preinit.
- *
- * Returns the count of clients that received the event.
- */
-int afb_daemon_broadcast_event(const char *name, struct json_object *object);
-
-/*
- * Creates an event of 'name' and returns it.
- *
- * Calling this function is only forbidden during preinit.
- *
- * See afb_event_is_valid to check if there is an error.
- */
-afb_event_t afb_daemon_make_event(const char *name);
-```
-
-The following function is used by logging macros and should normally
-not be used.  
-Instead, you should use the macros:
-
-- **AFB\_ERROR**
-- **AFB\_WARNING**
-- **AFB\_NOTICE**
-- **AFB\_INFO**
-- **AFB\_DEBUG**
-
-```C
-/*
- * Send a message described by 'fmt' and following parameters
- * to the journal for the verbosity 'level'.
- *
- * 'file', 'line' and 'func' are indicators of position of the code in source files
- * (see macros __FILE__, __LINE__ and __func__).
- *
- * 'level' is defined by syslog standard:
- *      EMERGENCY         0        System is unusable
- *      ALERT             1        Action must be taken immediately
- *      CRITICAL          2        Critical conditions
- *      ERROR             3        Error conditions
- *      WARNING           4        Warning conditions
- *      NOTICE            5        Normal but significant condition
- *      INFO              6        Informational
- *      DEBUG             7        Debug-level messages
- */
-void afb_daemon_verbose(int level, const char *file, int line, const char * func, const char *fmt, ...);
-```
-
-The 2 following functions MUST be used to access data of the bindings.
-
-```C
-/*
- * Get the root directory file descriptor. This file descriptor can
- * be used with functions 'openat', 'fstatat', ...
- */
-int afb_daemon_rootdir_get_fd();
-
-/*
- * Opens 'filename' within the root directory with 'flags' (see function openat)
- * using the 'locale' definition (example: "jp,en-US") that can be NULL.
- * Returns the file descriptor or -1 in case of error.
- */
-int afb_daemon_rootdir_open_locale(const char *filename, int flags, const char *locale);
-```
-
-The following function is used to queue jobs.
-
-```C
-/*
- * Queue the job defined by 'callback' and 'argument' for being executed asynchronously
- * in this thread (later) or in an other thread.
- * If 'group' is not NUL, the jobs queued with a same value (as the pointer value 'group')
- * are executed in sequence in the order of there submission.
- * If 'timeout' is not 0, it represent the maximum execution time for the job in seconds.
- * At first, the job is called with 0 as signum and the given argument.
- * The job is executed with the monitoring of its time and some signals like SIGSEGV and
- * SIGFPE. When a such signal is catched, the job is terminated and re-executed but with
- * signum being the signal number (SIGALRM when timeout expired).
- *
- * Returns 0 in case of success or -1 in case of error.
- */
-int afb_daemon_queue_job(void (*callback)(int signum, void *arg), void *argument, void *group, int timeout)
-```
-
-The following function must be used when a binding depends on other
-bindings at its initialization.
-
-```C
-/*
- * Tells that it requires the API of "name" to exist
- * and if 'initialized' is not null to be initialized.
- * Calling this function is only allowed within init.
- * Returns 0 in case of success or -1 in case of error.
- */
-int afb_daemon_require_api(const char *name, int initialized)
-```
-
-This function allows to give a different name to the binding.
-It can be called during pre-init.
-
-```C
-/*
- * Set the name of the API to 'name'.
- * Calling this function is only allowed within preinit.
- * Returns 0 in case of success or -1 in case of error.
- */
-int afb_daemon_rename_api(const char *name);
-```
-
-## Functions of class afb_service
-
-The following functions allow services to call verbs of other
-bindings for themselves.
-
-```C
-/**
- * Calls the 'verb' of the 'api' with the arguments 'args' and 'verb' in the name of the binding.
- * The result of the call is delivered to the 'callback' function with the 'callback_closure'.
- *
- * For convenience, the function calls 'json_object_put' for 'args'.
- * Thus, in the case where 'args' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * The 'callback' receives 3 arguments:
- *  1. 'closure' the user defined closure pointer 'callback_closure',
- *  2. 'status' a status being 0 on success or negative when an error occured,
- *  2. 'result' the resulting data as a JSON object.
- *
- * @param api      The api name of the method to call
- * @param verb     The verb name of the method to call
- * @param args     The arguments to pass to the method
- * @param callback The to call on completion
- * @param callback_closure The closure to pass to the callback
- *
- * @see also 'afb_req_subcall'
- */
-void afb_service_call(
-    const char *api,
-    const char *verb,
-    struct json_object *args,
-    void (*callback)(void*closure, int status, struct json_object *result),
-    void *callback_closure);
-
-/**
- * Calls the 'verb' of the 'api' with the arguments 'args' and 'verb' in the name of the binding.
- * 'result' will receive the response.
- *
- * For convenience, the function calls 'json_object_put' for 'args'.
- * Thus, in the case where 'args' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * @param api      The api name of the method to call
- * @param verb     The verb name of the method to call
- * @param args     The arguments to pass to the method
- * @param result   Where to store the result - should call json_object_put on it -
- *
- * @returns 0 in case of success or a negative value in case of error.
- *
- * @see also 'afb_req_subcall'
- */
-int afb_service_call_sync(
-    const char *api,
-    const char *verb,
-    struct json_object *args,
-    struct json_object **result);
-```
-
-## Functions of class afb_event
-
-This function checks whether the event is valid.  
-It must be used when creating events.
-
-```C
-/*
- * Checks wether the 'event' is valid or not.
- *
- * Returns 0 if not valid or 1 if valid.
- */
-int afb_event_is_valid(afb_event_t event);
-```
-
-The two following functions are used to broadcast or push
-event with its data.
-
-```C
-/*
- * Broadcasts widely the 'event' with the data 'object'.
- * 'object' can be NULL.
- *
- * For convenience, the function calls 'json_object_put' for 'object'.
- * Thus, in the case where 'object' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * Returns the count of clients that received the event.
- */
-int afb_event_broadcast(afb_event_t event, struct json_object *object);
-
-/*
- * Pushes the 'event' with the data 'object' to its observers.
- * 'object' can be NULL.
- *
- * For convenience, the function calls 'json_object_put' for 'object'.
- * Thus, in the case where 'object' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * Returns the count of clients that received the event.
- */
-int afb_event_push(afb_event_t event, struct json_object *object);
-```
-
-The following function remove one reference to the event.
-
-```C
-/*
- * Decrease the reference count of the event.
- * After calling this function, the event
- * MUST NOT BE USED ANYMORE.
- */
-void afb_event_unref(afb_event_t event);
-```
-
-The following function add one reference to the event.
-
-```C
-/*
- * Decrease the reference count of the event.
- * After calling this function, the event
- * MUST NOT BE USED ANYMORE.
- */
-void afb_event_unref(afb_event_t event);
-```
-
-This function allows to retrieve the exact name of the event.
-
-```C
-/*
- * Gets the name associated to the 'event'.
- */
-const char *afb_event_name(afb_event_t event);
-```
-
-## Functions of class afb_req
-
-This function checks the validity of the **req**.
-
-```C
-/*
- * Checks wether the request 'req' is valid or not.
- *
- * Returns 0 if not valid or 1 if valid.
- */
-int afb_req_is_valid(afb_req_t req);
-```
-
-The following functions retrieves parameters of the request.
-
-```C
-/*
- * Gets from the request 'req' the argument of 'name'.
- * Returns a PLAIN structure of type 'struct afb_arg'.
- * When the argument of 'name' is not found, all fields of result are set to NULL.
- * When the argument of 'name' is found, the fields are filled,
- * in particular, the field 'result.name' is set to 'name'.
- *
- * There is a special name value: the empty string.
- * The argument of name "" is defined only if the request was made using
- * an HTTP POST of Content-Type "application/json". In that case, the
- * argument of name "" receives the value of the body of the HTTP request.
- */
-afb_arg_t afb_req_get(afb_req_t req, const char *name);
-
-/*
- * Gets from the request 'req' the string value of the argument of 'name'.
- * Returns NULL if when there is no argument of 'name'.
- * Returns the value of the argument of 'name' otherwise.
- *
- * Shortcut for: afb_req_get(req, name).value
- */
-const char *afb_req_value(afb_req_t req, const char *name);
-
-/*
- * Gets from the request 'req' the path for file attached to the argument of 'name'.
- * Returns NULL if when there is no argument of 'name' or when there is no file.
- * Returns the path of the argument of 'name' otherwise.
- *
- * Shortcut for: afb_req_get(req, name).path
- */
-const char *afb_req_path(afb_req_t req, const char *name);
-
-/*
- * Gets from the request 'req' the json object hashing the arguments.
- * The returned object must not be released using 'json_object_put'.
- */
-struct json_object *afb_req_json(afb_req_t req);
-```
-
-The following functions emit the reply to the request.
-
-```C
-/*
- * Sends a reply of kind success to the request 'req'.
- * The status of the reply is automatically set to "success".
- * Its send the object 'obj' (can be NULL) with an
- * informationnal comment 'info (can also be NULL).
- *
- * For convenience, the function calls 'json_object_put' for 'obj'.
- * Thus, in the case where 'obj' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- */
-void afb_req_success(afb_req_t req, struct json_object *obj, const char *info);
-
-/*
- * Same as 'afb_req_success' but the 'info' is a formatting
- * string followed by arguments.
- *
- * For convenience, the function calls 'json_object_put' for 'obj'.
- * Thus, in the case where 'obj' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- */
-void afb_req_success_f(afb_req_t req, struct json_object *obj, const char *info, ...);
-
-/*
- * Same as 'afb_req_success_f' but the arguments to the format 'info'
- * are given as a variable argument list instance.
- *
- * For convenience, the function calls 'json_object_put' for 'obj'.
- * Thus, in the case where 'obj' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- */
-void afb_req_success_v(afb_req_t req, struct json_object *obj, const char *info, va_list args);
-
-/*
- * Sends a reply of kind failure to the request 'req'.
- * The status of the reply is set to 'status' and an
- * informational comment 'info' (can also be NULL) can be added.
- *
- * Note that calling afb_req_fail("success", info) is equivalent
- * to call afb_req_success(NULL, info). Thus even if possible it
- * is strongly recommended to NEVER use "success" for status.
- */
-void afb_req_fail(afb_req_t req, const char *status, const char *info);
-
-/*
- * Same as 'afb_req_fail' but the 'info' is a formatting
- * string followed by arguments.
- */
-void afb_req_fail_f(afb_req_t req, const char *status, const char *info, ...);
-
-/*
- * Same as 'afb_req_fail_f' but the arguments to the format 'info'
- * are given as a variable argument list instance.
- */
-void afb_req_fail_v(afb_req_t req, const char *status, const char *info, va_list args);
-```
-
-The following functions handle the session data.
-
-```C
-/*
- * Gets the pointer stored by the binding for the session of 'req'.
- * When the binding has not yet recorded a pointer, NULL is returned.
- */
-void *afb_req_context_get(afb_req_t req);
-
-/*
- * Stores for the binding the pointer 'context' to the session of 'req'.
- * The function 'free_context' will be called when the session is closed
- * or if binding stores an other pointer.
- */
-void afb_req_context_set(afb_req_t req, void *context, void (*free_context)(void*));
-
-/*
- * Gets the pointer stored by the binding for the session of 'req'.
- * If the stored pointer is NULL, indicating that no pointer was
- * already stored, afb_req_context creates a new context by calling
- * the function 'create_context' and stores it with the freeing function
- * 'free_context'.
- */
-void *afb_req_context(afb_req_t req, void *(*create_context)(), void (*free_context)(void*));
-
-/*
- * Frees the pointer stored by the binding for the session of 'req'
- * and sets it to NULL.
- *
- * Shortcut for: afb_req_context_set(req, NULL, NULL)
- */
-void afb_req_context_clear(afb_req_t req);
-
-/*
- * Closes the session associated with 'req'
- * and delete all associated contexts.
- */
-void afb_req_session_close(afb_req_t req);
-
-/*
- * Sets the level of assurance of the session of 'req'
- * to 'level'. The effect of this function is subject of
- * security policies.
- * Returns 1 on success or 0 if failed.
- */
-int afb_req_session_set_LOA(afb_req_t req, unsigned level);
-```
-
-The 4 following functions must be used for asynchronous handling requests.
-
-```C
-/*
- * Adds one to the count of references of 'req'.
- * This function MUST be called by asynchronous implementations
- * of verbs if no reply was sent before returning.
- */
-void afb_req_addref(afb_req_t req);
-
-/*
- * Substracts one to the count of references of 'req'.
- * This function MUST be called by asynchronous implementations
- * of verbs after sending the asynchronous reply.
- */
-void afb_req_unref(afb_req_t req);
-
-/*
- * Stores 'req' on heap for asynchronous use.
- * Returns a handler to the stored 'req' or NULL on memory depletion.
- * The count of reference to 'req' is incremented on success
- * (see afb_req_addref).
- */
-struct afb_stored_req *afb_req_store(afb_req_t req);
-
-/*
- * Retrieves the afb_req stored at 'sreq'.
- * Returns the stored request.
- * The count of reference is UNCHANGED, thus, the
- * function 'afb_req_unref' should be called on the result
- * after that the asynchronous reply if sent.
- */
-afb_req_t afb_req_unstore(struct afb_stored_req *sreq);
-```
-
-The two following functions are used to associate client with events
-(subscription).
-
-```C
-/*
- * Establishes for the client link identified by 'req' a subscription
- * to the 'event'.
- * Returns 0 in case of successful subscription or -1 in case of error.
- */
-int afb_req_subscribe(afb_req_t req, afb_event_t event);
-
-/*
- * Revokes the subscription established to the 'event' for the client
- * link identified by 'req'.
- * Returns 0 in case of successful subscription or -1 in case of error.
- */
-int afb_req_unsubscribe(afb_req_t req, afb_event_t event);
-```
-
-The following functions must be used to make request in the name of the
-client (with its permissions).
-
-```C
-/*
- * Makes a call to the method of name 'api' / 'verb' with the object 'args'.
- * This call is made in the context of the request 'req'.
- * On completion, the function 'callback' is invoked with the
- * 'closure' given at call and two other parameters: 'iserror' and 'result'.
- * 'status' is 0 on success or negative when on an error reply.
- * 'result' is the json object of the reply, you must not call json_object_put
- * on the result.
- *
- * For convenience, the function calls 'json_object_put' for 'args'.
- * Thus, in the case where 'args' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * See also:
- *  - 'afb_req_subcall_req' that is convenient to keep request alive automatically.
- *  - 'afb_req_subcall_sync' the synchronous version
- */
-void afb_req_subcall(
-                afb_req_t req,
-                const char *api,
-                const char *verb,
-                struct json_object *args,
-                void (*callback)(void *closure, int status, struct json_object *result),
-                void *closure);
-
-/*
- * Makes a call to the method of name 'api' / 'verb' with the object 'args'.
- * This call is made in the context of the request 'req'.
- * On completion, the function 'callback' is invoked with the
- * original request 'req', the 'closure' given at call and two
- * other parameters: 'iserror' and 'result'.
- * 'status' is 0 on success or negative when on an error reply.
- * 'result' is the json object of the reply, you must not call json_object_put
- * on the result.
- *
- * For convenience, the function calls 'json_object_put' for 'args'.
- * Thus, in the case where 'args' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * See also:
- *  - 'afb_req_subcall' that doesn't keep request alive automatically.
- *  - 'afb_req_subcall_sync' the synchronous version
- */
-static inline void afb_req_subcall_req(afb_req_t req, const char *api, const char *verb, struct json_object *args, void (*callback)(void *closure, int iserror, struct json_object *result, afb_req_t req), void *closure)
-{
-	req.itf->subcall_req(req.closure, api, verb, args, callback, closure);
-}
-
-/*
- * Makes a call to the method of name 'api' / 'verb' with the object 'args'.
- * This call is made in the context of the request 'req'.
- * This call is synchronous, it waits untill completion of the request.
- * It returns 0 on success or a negative value on error answer.
- * The object pointed by 'result' is filled and must be released by the caller
- * after its use by calling 'json_object_put'.
- *
- * For convenience, the function calls 'json_object_put' for 'args'.
- * Thus, in the case where 'args' should remain available after
- * the function returns, the function 'json_object_get' shall be used.
- *
- * See also:
- *  - 'afb_req_subcall_req' that is convenient to keep request alive automatically.
- *  - 'afb_req_subcall' that doesn't keep request alive automatically.
- */
-int afb_req_subcall_sync(
-                afb_req_t req,
-                const char *api,
-                const char *verb,
-                struct json_object *args,
-                struct json_object **result);
-```
-
-The following function is used by logging macros and should normally
-not be used.  
-Instead, you should use the macros:
-
-- **AFB_REQ_ERROR**
-- **AFB_REQ_WARNING**
-- **AFB_REQ_NOTICE**
-- **AFB_REQ_INFO**
-- **AFB_REQ_DEBUG**
-
-```C
-/*
- * Send associated to 'req' a message described by 'fmt' and following parameters
- * to the journal for the verbosity 'level'.
- *
- * 'file', 'line' and 'func' are indicators of position of the code in source files
- * (see macros __FILE__, __LINE__ and __func__).
- *
- * 'level' is defined by syslog standard:
- *      EMERGENCY         0        System is unusable
- *      ALERT             1        Action must be taken immediately
- *      CRITICAL          2        Critical conditions
- *      ERROR             3        Error conditions
- *      WARNING           4        Warning conditions
- *      NOTICE            5        Normal but significant condition
- *      INFO              6        Informational
- *      DEBUG             7        Debug-level messages
- */
-void afb_req_verbose(afb_req_t req, int level, const char *file, int line, const char * func, const char *fmt, ...);
-```
-
-The functions below allow a binding involved in the platform security
-to explicitely check a permission of a client or to get the calling
-application identity.
-
-```C
-/*
- * Check whether the 'permission' is granted or not to the client
- * identified by 'req'.
- *
- * Returns 1 if the permission is granted or 0 otherwise.
- */
-int afb_req_has_permission(afb_req_t req, const char *permission);
-
-/*
- * Get the application identifier of the client application for the
- * request 'req'.
- *
- * Returns the application identifier or NULL when the application
- * can not be identified.
- *
- * The returned value if not NULL must be freed by the caller
- */
-char *afb_req_get_application_id(afb_req_t req);
-
-/*
- * Get the user identifier (UID) of the client application for the
- * request 'req'.
- *
- * Returns -1 when the application can not be identified.
- */
-int afb_req_get_uid(afb_req_t req);
-```
-
-## Logging macros
-
-The following macros must be used for logging:
-
-```C
-AFB_ERROR(fmt,...)
-AFB_WARNING(fmt,...)
-AFB_NOTICE(fmt,...)
-AFB_INFO(fmt,...)
-AFB_DEBUG(fmt,...)
-```
-
-The following macros can be used for logging in the context
-of a request **req** of type **afb_req**:
-
-```C
-AFB_REQ_ERROR(req,fmt,...)
-AFB_REQ_WARNING(req,fmt,...)
-AFB_REQ_NOTICE(req,fmt,...)
-AFB_REQ_INFO(req,fmt,...)
-AFB_REQ_DEBUG(req,fmt,...)
-```
-
-By default, the logging macros add file, line and function
-indication.
+  * [Structures and types](reference-v3/types-and-globals.md.md)
+  * [Functions of api](reference-v3/func-api.md)
+  * [Functions of req](reference-v3/func-req.md)
+  * [Functions of event](reference-v3/func-event.md)
+  * [Functions of daemon](reference-v3/func-daemon.md)
+  * [Functions of service](reference-v3/func-service.md)
+  * [Macros for logging](reference-v3/macro-log.md)