X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=include%2Fafb%2Fafb-binding.h;h=950cd898a8995d71033a4e5f02525b0c09b16d46;hb=65353dce81a629e042800bb7b86fcd869a76727e;hp=41ce0c521548a9f6b13e2bab394c21172a435a19;hpb=a38382e89710db2c298f7f101e3ba0cf3681287c;p=src%2Fapp-framework-binder.git diff --git a/include/afb/afb-binding.h b/include/afb/afb-binding.h index 41ce0c52..950cd898 100644 --- a/include/afb/afb-binding.h +++ b/include/afb/afb-binding.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2016, 2017 "IoT.bzh" + * Copyright (C) 2015-2020 "IoT.bzh" * Author: José Bollo * * Licensed under the Apache License, Version 2.0 (the "License"); @@ -17,284 +17,105 @@ #pragma once -#include - -/***************************************************************************** - * This files is the main file to include for writing bindings dedicated to +/** + * @mainpage * - * AFB-DAEMON + * @section brief Brief introduction * - * Functions of bindings of afb-daemon are accessible by authorized clients - * through the apis module of afb-daemon. + * This is part of the AGL framework micro-service binder and is provided as the + * API for writing bindings. * - * A binding is a shared library. This shared library must have at least one - * exported symbol for being registered in afb-daemon. - * For the current version of afb-daemon, the function exported MUST be named + * The normal usage is to include only one file as below: * - * afbBindingV1Register - */ - -/* - * Some function of the library are exported to afb-daemon. - */ - -#include -#include - -/* - * Definition of the type+versions of the binding. - * The definition uses hashes. - */ -enum afb_binding_type -{ - AFB_BINDING_VERSION_1 = 123456789 /* version 1 */ -}; - -/* - * Enum for Session/Token/Assurance middleware. - * This enumeration is valid for bindings of type 1 - */ -enum afb_session_v1 -{ - AFB_SESSION_NONE = 0, /* nothing required */ - AFB_SESSION_CREATE = 1, /* Obsolete */ - AFB_SESSION_CLOSE = 2, /* After token authentification, closes the session at end */ - AFB_SESSION_RENEW = 4, /* After token authentification, refreshes the token at end */ - AFB_SESSION_CHECK = 8, /* Requires token authentification */ - - AFB_SESSION_LOA_GE = 16, /* check that the LOA is greater or equal to the given value */ - AFB_SESSION_LOA_LE = 32, /* check that the LOA is lesser or equal to the given value */ - AFB_SESSION_LOA_EQ = 48, /* check that the LOA is equal to the given value */ - - AFB_SESSION_LOA_SHIFT = 6, /* shift for LOA */ - AFB_SESSION_LOA_MASK = 7, /* mask for LOA */ - - AFB_SESSION_LOA_0 = 0, /* value for LOA of 0 */ - AFB_SESSION_LOA_1 = 64, /* value for LOA of 1 */ - AFB_SESSION_LOA_2 = 128, /* value for LOA of 2 */ - AFB_SESSION_LOA_3 = 192, /* value for LOA of 3 */ - AFB_SESSION_LOA_4 = 256, /* value for LOA of 4 */ - - AFB_SESSION_LOA_LE_0 = AFB_SESSION_LOA_LE | AFB_SESSION_LOA_0, /* check LOA <= 0 */ - AFB_SESSION_LOA_LE_1 = AFB_SESSION_LOA_LE | AFB_SESSION_LOA_1, /* check LOA <= 1 */ - AFB_SESSION_LOA_LE_2 = AFB_SESSION_LOA_LE | AFB_SESSION_LOA_2, /* check LOA <= 2 */ - AFB_SESSION_LOA_LE_3 = AFB_SESSION_LOA_LE | AFB_SESSION_LOA_3, /* check LOA <= 3 */ - - AFB_SESSION_LOA_GE_0 = AFB_SESSION_LOA_GE | AFB_SESSION_LOA_0, /* check LOA >= 0 */ - AFB_SESSION_LOA_GE_1 = AFB_SESSION_LOA_GE | AFB_SESSION_LOA_1, /* check LOA >= 1 */ - AFB_SESSION_LOA_GE_2 = AFB_SESSION_LOA_GE | AFB_SESSION_LOA_2, /* check LOA >= 2 */ - AFB_SESSION_LOA_GE_3 = AFB_SESSION_LOA_GE | AFB_SESSION_LOA_3, /* check LOA >= 3 */ - - AFB_SESSION_LOA_EQ_0 = AFB_SESSION_LOA_EQ | AFB_SESSION_LOA_0, /* check LOA == 0 */ - AFB_SESSION_LOA_EQ_1 = AFB_SESSION_LOA_EQ | AFB_SESSION_LOA_1, /* check LOA == 1 */ - AFB_SESSION_LOA_EQ_2 = AFB_SESSION_LOA_EQ | AFB_SESSION_LOA_2, /* check LOA == 2 */ - AFB_SESSION_LOA_EQ_3 = AFB_SESSION_LOA_EQ | AFB_SESSION_LOA_3 /* check LOA == 3 */ -}; - -/* - * Description of one verb of the API provided by the binding - * This enumeration is valid for bindings of type 1 - */ -struct afb_verb_desc_v1 -{ - const char *name; /* name of the verb */ - enum afb_session_v1 session; /* authorisation and session requirements of the verb */ - void (*callback)(struct afb_req req); /* callback function implementing the verb */ - const char *info; /* textual description of the verb */ -}; - -/* - * Description of the bindings of type 1 - */ -struct afb_binding_desc_v1 -{ - const char *info; /* textual information about the binding */ - const char *prefix; /* required prefix name for the binding */ - const struct afb_verb_desc_v1 *verbs; /* array of descriptions of verbs terminated by a NULL name */ -}; - -/* - * Description of a binding - */ -struct afb_binding -{ - enum afb_binding_type type; /* type of the binding */ - union { - struct afb_binding_desc_v1 v1; /* description of the binding of type 1 */ - }; -}; - -/* - * config mode + * ```C + * #define AFB_BINDING_VERSION 3 + * #include + * ``` + * + * @example tuto-1.c + * @example tuto-2.c */ -enum afb_mode { - AFB_MODE_LOCAL = 0, /* run locally */ - AFB_MODE_REMOTE, /* run remotely */ - AFB_MODE_GLOBAL /* run either remotely or locally (DONT USE! reserved for future) */ -}; - -/* declaration of features of libsystemd */ -struct sd_event; -struct sd_bus; - -/* - * Definition of the facilities provided by the daemon. +/** + * @file afb/afb-binding.h */ -struct afb_daemon_itf { - int (*event_broadcast)(void *closure, const char *name, struct json_object *object); /* broadcasts evant 'name' with 'object' */ - struct sd_event *(*get_event_loop)(void *closure); /* gets the common systemd's event loop */ - struct sd_bus *(*get_user_bus)(void *closure); /* gets the common systemd's user d-bus */ - struct sd_bus *(*get_system_bus)(void *closure); /* gets the common systemd's system d-bus */ - void (*vverbose)(void*closure, int level, const char *file, int line, const char *fmt, va_list args); - struct afb_event (*event_make)(void *closure, const char *name); /* creates an event of 'name' */ - int (*rootdir_get_fd)(void *closure); - int (*rootdir_open_locale)(void *closure, const char *filename, int flags, const char *locale); -}; -/* - * Structure for accessing daemon. - * See also: afb_daemon_get_event_sender, afb_daemon_get_event_loop, afb_daemon_get_user_bus, afb_daemon_get_system_bus - */ -struct afb_daemon { - const struct afb_daemon_itf *itf; /* the interfacing functions */ - void *closure; /* the closure when calling these functions */ -}; +#include +#include +#include -/* - * Interface between the daemon and the binding. - */ -struct afb_binding_interface -{ - struct afb_daemon daemon; /* access to the daemon facilies */ - int verbosity; /* level of verbosity */ - enum afb_mode mode; /* run mode (local or remote) */ -}; +/** + * @def AFB_BINDING_INTERFACE_VERSION -/* - * Function for registering the binding - * - * A binding V1 MUST have a function of this name and signature. - * This function is called during loading of the binding. It - * receives an 'interface' that should be recorded for later access to - * functions provided by the framework. + * * Version of the binding interface. * - * This function MUST return the address of a structure that describes - * the binding and its implemented verbs. + * This is intended to be test for tuning condition code. + * It is of the form MAJOR * 1000 + REVISION. * - * In case of initialisation error, NULL must be returned. - * - * Be aware that the given 'interface' is not fully functionnal - * because no provision is given to the name and description - * of the binding. Check the function 'afbBindingV1ServiceInit' - * defined in the file because when - * the function 'afbBindingV1ServiceInit' is called, the 'interface' - * is fully functionnal. - */ -extern const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *interface); - -/* - * Retrieves the common systemd's event loop of AFB - * 'daemon' MUST be the daemon given in interface when activating the binding. - */ -static inline struct sd_event *afb_daemon_get_event_loop(struct afb_daemon daemon) -{ - return daemon.itf->get_event_loop(daemon.closure); -} - -/* - * Retrieves the common systemd's user/session d-bus of AFB - * 'daemon' MUST be the daemon given in interface when activating the binding. - */ -static inline struct sd_bus *afb_daemon_get_user_bus(struct afb_daemon daemon) -{ - return daemon.itf->get_user_bus(daemon.closure); -} - -/* - * Retrieves the common systemd's system d-bus of AFB - * 'daemon' MUST be the daemon given in interface when activating the binding. + * @see AFB_BINDING_UPPER_VERSION that should match MAJOR */ -static inline struct sd_bus *afb_daemon_get_system_bus(struct afb_daemon daemon) -{ - return daemon.itf->get_system_bus(daemon.closure); -} +#define AFB_BINDING_INTERFACE_VERSION 3000 -/* - * Broadcasts widely the event of 'name' with the data 'object'. - * 'object' can be NULL. - * 'daemon' MUST be the daemon given in interface when activating the binding. +/** + * @def AFB_BINDING_LOWER_VERSION * - * 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. + * Lowest binding API version supported. * - * Returns the count of clients that received the event. + * @see AFB_BINDING_VERSION + * @see AFB_BINDING_UPPER_VERSION */ -static inline int afb_daemon_broadcast_event(struct afb_daemon daemon, const char *name, struct json_object *object) -{ - return daemon.itf->event_broadcast(daemon.closure, name, object); -} +#define AFB_BINDING_LOWER_VERSION 1 -/* - * Creates an event of 'name' and returns it. - * 'daemon' MUST be the daemon given in interface when activating the binding. +/** + * @def AFB_BINDING_UPPER_VERSION + * + * Upper binding API version supported. + * + * @see AFB_BINDING_VERSION + * @see AFB_BINDING_LOWER_VERSION */ -static inline struct afb_event afb_daemon_make_event(struct afb_daemon daemon, const char *name) -{ - return daemon.itf->event_make(daemon.closure, name); -} +#define AFB_BINDING_UPPER_VERSION 3 -/* - * Send a message described by 'fmt' and following parameters - * to the journal for the verbosity 'level'. - * 'file' and 'line' are indicators of position of the code in source files. - * 'daemon' MUST be the daemon given in interface when activating the binding. - */ -static inline void afb_daemon_verbose(struct afb_daemon daemon, int level, const char *file, int line, const char *fmt, ...) __attribute__((format(printf, 5, 6))); -static inline void afb_daemon_verbose(struct afb_daemon daemon, int level, const char *file, int line, const char *fmt, ...) -{ - va_list args; - va_start(args, fmt); - daemon.itf->vverbose(daemon.closure, level, file, line, fmt, args); - va_end(args); -} +/** + * @def AFB_BINDING_VERSION + * + * This macro must be defined before including to set + * the required binding API. + */ + +#ifndef AFB_BINDING_VERSION +#error "\ +\n\ +\n\ + AFB_BINDING_VERSION should be defined before including \n\ + AFB_BINDING_VERSION defines the version of binding that you use.\n\ + Currently the version to use is 3 (older versions: 1 is obsolete, 2 is legacy).\n\ + Consider to add one of the following define before including :\n\ +\n\ + #define AFB_BINDING_VERSION 3\n\ +\n\ +" +#else +# if AFB_BINDING_VERSION == 1 +# warning "Using binding version 1, consider to switch to version 3" +# endif +# if AFB_BINDING_VERSION == 2 +# warning "Using binding version 2, consider to switch to version 3" +# endif +#endif -/* - * Macros for logging messages - */ -#if !defined(NO_BINDING_VERBOSE_MACRO) -# if !defined(NO_BINDING_FILE_LINE_INDICATION) -# define ERROR(itf,...) do{if(itf->verbosity>=0)afb_daemon_verbose(itf->daemon,3,__FILE__,__LINE__,__VA_ARGS__);}while(0) -# define WARNING(itf,...) do{if(itf->verbosity>=1)afb_daemon_verbose(itf->daemon,4,__FILE__,__LINE__,__VA_ARGS__);}while(0) -# define NOTICE(itf,...) do{if(itf->verbosity>=1)afb_daemon_verbose(itf->daemon,5,__FILE__,__LINE__,__VA_ARGS__);}while(0) -# define INFO(itf,...) do{if(itf->verbosity>=2)afb_daemon_verbose(itf->daemon,6,__FILE__,__LINE__,__VA_ARGS__);}while(0) -# define DEBUG(itf,...) do{if(itf->verbosity>=3)afb_daemon_verbose(itf->daemon,7,__FILE__,__LINE__,__VA_ARGS__);}while(0) -# else -# define ERROR(itf,...) do{if(itf->verbosity>=0)afb_daemon_verbose(itf->daemon,3,NULL,0,__VA_ARGS__);}while(0) -# define WARNING(itf,...) do{if(itf->verbosity>=1)afb_daemon_verbose(itf->daemon,4,NULL,0,__VA_ARGS__);}while(0) -# define NOTICE(itf,...) do{if(itf->verbosity>=1)afb_daemon_verbose(itf->daemon,5,NULL,0,__VA_ARGS__);}while(0) -# define INFO(itf,...) do{if(itf->verbosity>=2)afb_daemon_verbose(itf->daemon,6,NULL,0,__VA_ARGS__);}while(0) -# define DEBUG(itf,...) do{if(itf->verbosity>=3)afb_daemon_verbose(itf->daemon,7,NULL,0,__VA_ARGS__);}while(0) +#if AFB_BINDING_VERSION != 0 +# if AFB_BINDING_VERSION < AFB_BINDING_LOWER_VERSION || AFB_BINDING_VERSION > AFB_BINDING_UPPER_VERSION +# error "Unsupported binding version AFB_BINDING_VERSION" # endif #endif -/* - * Get the root directory file descriptor. This file descriptor can - * be used with functions 'openat', 'fstatat', ... - */ -static inline int afb_daemon_rootdir_get_fd(struct afb_daemon daemon) -{ - return daemon.itf->rootdir_get_fd(daemon.closure); -} - -/* - * 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. - */ -static inline int afb_daemon_rootdir_open_locale(struct afb_daemon daemon, const char *filename, int flags, const char *locale) -{ - return daemon.itf->rootdir_open_locale(daemon.closure, filename, flags, locale); -} - +/***************************************************************************************************/ +#include "afb-binding-predefs.h" +#include "afb-binding-v1.h" +#include "afb-binding-v2.h" +#include "afb-binding-v3.h" +#if defined(AFB_BINDING_WANT_DYNAPI) +# include "afb-dynapi-legacy.h" +#endif +#include "afb-binding-postdefs.h"