src/afb-export.c

   1 /*
   2  * Copyright (C) 2016-2019 "IoT.bzh"
   3  * Author: José Bollo <jose.bollo@iot.bzh>
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *   http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #define _GNU_SOURCE
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <errno.h>
  23 #include <fnmatch.h>
  24 #include <ctype.h>
  25
  26 #include <json-c/json.h>
  27 #if !defined(JSON_C_TO_STRING_NOSLASHESCAPE)
  28 #define JSON_C_TO_STRING_NOSLASHESCAPE 0
  29 #endif
  30
  31 #define AFB_BINDING_VERSION 0
  32 #include <afb/afb-binding.h>
  33
  34 #include "afb-api.h"
  35 #include "afb-apiset.h"
  36 #if WITH_LEGACY_BINDING_V1
  37 #include "afb-api-so-v1.h"
  38 #endif
  39 #if WITH_LEGACY_BINDING_V2
  40 #include "afb-api-so-v2.h"
  41 #endif
  42 #include "afb-api-v3.h"
  43 #include "afb-common.h"
  44 #include "afb-cred.h"
  45 #include "afb-evt.h"
  46 #include "afb-export.h"
  47 #include "afb-hook.h"
  48 #include "afb-msg-json.h"
  49 #include "afb-session.h"
  50 #include "afb-xreq.h"
  51 #include "afb-calls.h"
  52
  53 #include "systemd.h"
  54 #include "jobs.h"
  55 #include "verbose.h"
  56 #include "globset.h"
  57 #include "sig-monitor.h"
  58 #include "wrap-json.h"
  59
  60 /*************************************************************************
  61  * internal types
  62  ************************************************************************/
  63
  64 /*
  65  * Actually supported versions
  66  */
  67 enum afb_api_version
  68 {
  69         Api_Version_None = 0,
  70 #if WITH_LEGACY_BINDING_V1
  71         Api_Version_1 = 1,
  72 #endif
  73 #if WITH_LEGACY_BINDING_V2
  74         Api_Version_2 = 2,
  75 #endif
  76         Api_Version_3 = 3
  77 };
  78
  79 /*
  80  * The states of exported APIs
  81  */
  82 enum afb_api_state
  83 {
  84         Api_State_Pre_Init,
  85         Api_State_Init,
  86         Api_State_Run
  87 };
  88
  89 /*
  90  * structure of the exported API
  91  */
  92 struct afb_export
  93 {
  94         /* keep it first */
  95         struct afb_api_x3 api;
  96
  97         /* reference count */
  98         int refcount;
  99
 100         /* version of the api */
 101         unsigned version: 4;
 102
 103         /* current state */
 104         unsigned state: 4;
 105
 106         /* declared */
 107         unsigned declared: 1;
 108
 109         /* unsealed */
 110         unsigned unsealed: 1;
 111
 112 #if WITH_AFB_HOOK
 113         /* hooking flags */
 114         int hookditf;
 115         int hooksvc;
 116 #endif
 117
 118         /* session for service */
 119         struct afb_session *session;
 120
 121         /* apiset the API is declared in */
 122         struct afb_apiset *declare_set;
 123
 124         /* apiset for calls */
 125         struct afb_apiset *call_set;
 126
 127         /* event listener for service or NULL */
 128         struct afb_evt_listener *listener;
 129
 130         /* event handler list */
 131         struct globset *event_handlers;
 132
 133         /* creator if any */
 134         struct afb_export *creator;
 135
 136         /* path indication if any */
 137         const char *path;
 138
 139         /* settings */
 140         struct json_object *settings;
 141
 142         /* internal descriptors */
 143         union {
 144 #if WITH_LEGACY_BINDING_V1
 145                 struct afb_binding_v1 *v1;
 146 #endif
 147                 const struct afb_binding_v2 *v2;
 148                 struct afb_api_v3 *v3;
 149         } desc;
 150
 151         /* start function */
 152         union {
 153 #if WITH_LEGACY_BINDING_V1
 154                 int (*v1)(struct afb_service_x1);
 155 #endif
 156                 int (*v2)();
 157                 int (*v3)(struct afb_api_x3 *api);
 158         } init;
 159
 160         /* event handling */
 161         void (*on_any_event_v12)(const char *event, struct json_object *object);
 162         void (*on_any_event_v3)(struct afb_api_x3 *api, const char *event, struct json_object *object);
 163
 164         /* exported data */
 165         union {
 166 #if WITH_LEGACY_BINDING_V1
 167                 struct afb_binding_interface_v1 v1;
 168 #endif
 169                 struct afb_binding_data_v2 *v2;
 170         } export;
 171
 172         /* initial name */
 173         char name[];
 174 };
 175
 176 /*****************************************************************************/
 177
 178 static inline struct afb_api_x3 *to_api_x3(struct afb_export *export)
 179 {
 180         return (struct afb_api_x3*)export;
 181 }
 182
 183 static inline struct afb_export *from_api_x3(struct afb_api_x3 *api)
 184 {
 185         return (struct afb_export*)api;
 186 }
 187
 188 struct afb_export *afb_export_from_api_x3(struct afb_api_x3 *api)
 189 {
 190         return from_api_x3(api);
 191 }
 192
 193 struct afb_api_x3 *afb_export_to_api_x3(struct afb_export *export)
 194 {
 195         return to_api_x3(export);
 196 }
 197
 198 /******************************************************************************
 199  ******************************************************************************
 200  ******************************************************************************
 201  ******************************************************************************
 202         SETTINGS
 203  ******************************************************************************
 204  ******************************************************************************
 205  ******************************************************************************
 206  ******************************************************************************/
 207
 208 static struct json_object *configuration;
 209
 210 void afb_export_set_config(struct json_object *config)
 211 {
 212         struct json_object *save = configuration;
 213         configuration = json_object_get(config);
 214         json_object_put(save);
 215 }
 216
 217 static struct json_object *make_settings(struct afb_export *export)
 218 {
 219         struct json_object *result;
 220         struct json_object *obj;
 221         struct afb_export *iter;
 222         char *path;
 223
 224         /* clone the globals */
 225         if (json_object_object_get_ex(configuration, "*", &obj))
 226                 result = wrap_json_clone(obj);
 227         else
 228                 result = json_object_new_object();
 229
 230         /* add locals */
 231         if (json_object_object_get_ex(configuration, export->name, &obj))
 232                 wrap_json_object_add(result, obj);
 233
 234         /* add library path */
 235         for (iter = export ; iter && !iter->path ; iter = iter->creator);
 236         if (iter) {
 237                 path = realpath(iter->path, NULL);
 238                 json_object_object_add(result, "binding-path", json_object_new_string(path));
 239                 free(path);
 240         }
 241
 242         export->settings = result;
 243         return result;
 244 }
 245
 246 /******************************************************************************
 247  ******************************************************************************
 248  ******************************************************************************
 249  ******************************************************************************
 250                                            F R O M     D I T F
 251  ******************************************************************************
 252  ******************************************************************************
 253  ******************************************************************************
 254  ******************************************************************************/
 255
 256 /**********************************************
 257 * normal flow
 258 **********************************************/
 259 static void vverbose_cb(struct afb_api_x3 *closure, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
 260 {
 261         char *p;
 262         struct afb_export *export = from_api_x3(closure);
 263
 264         if (!fmt || vasprintf(&p, fmt, args) < 0)
 265                 vverbose(level, file, line, function, fmt, args);
 266         else {
 267                 verbose(level, file, line, function, (verbose_is_colorized() == 0 ? "[API %s] %s" : COLOR_API "[API %s]" COLOR_DEFAULT " %s"), export->api.apiname, p);
 268                 free(p);
 269         }
 270 }
 271
 272 static struct afb_event_x2 *event_x2_make_cb(struct afb_api_x3 *closure, const char *name)
 273 {
 274         struct afb_export *export = from_api_x3(closure);
 275
 276         /* check daemon state */
 277         if (export->state == Api_State_Pre_Init) {
 278                 ERROR("[API %s] Bad call to 'afb_daemon_event_make(%s)', must not be in PreInit", export->api.apiname, name);
 279                 errno = EINVAL;
 280                 return NULL;
 281         }
 282
 283         /* create the event */
 284         return afb_evt_event_x2_create2(export->api.apiname, name);
 285 }
 286
 287 static int event_broadcast_cb(struct afb_api_x3 *closure, const char *name, struct json_object *object)
 288 {
 289         size_t plen, nlen;
 290         char *event;
 291         struct afb_export *export = from_api_x3(closure);
 292
 293         /* check daemon state */
 294         if (export->state == Api_State_Pre_Init) {
 295                 ERROR("[API %s] Bad call to 'afb_daemon_event_broadcast(%s, %s)', must not be in PreInit",
 296                         export->api.apiname, name, json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE));
 297                 errno = EINVAL;
 298                 return 0;
 299         }
 300
 301         /* makes the event name */
 302         plen = strlen(export->api.apiname);
 303         nlen = strlen(name);
 304         event = alloca(nlen + plen + 2);
 305         memcpy(event, export->api.apiname, plen);
 306         event[plen] = '/';
 307         memcpy(event + plen + 1, name, nlen + 1);
 308
 309         /* broadcast the event */
 310         return afb_evt_broadcast(event, object);
 311 }
 312
 313 static struct sd_event *get_event_loop(struct afb_api_x3 *closure)
 314 {
 315         jobs_acquire_event_manager();
 316         return systemd_get_event_loop();
 317 }
 318
 319 static struct sd_bus *get_user_bus(struct afb_api_x3 *closure)
 320 {
 321         jobs_acquire_event_manager();
 322         return systemd_get_user_bus();
 323 }
 324
 325 static struct sd_bus *get_system_bus(struct afb_api_x3 *closure)
 326 {
 327         jobs_acquire_event_manager();
 328         return systemd_get_system_bus();
 329 }
 330
 331 static int rootdir_open_locale_cb(struct afb_api_x3 *closure, const char *filename, int flags, const char *locale)
 332 {
 333         return afb_common_rootdir_open_locale(filename, flags, locale);
 334 }
 335
 336 static int queue_job_cb(struct afb_api_x3 *closure, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout)
 337 {
 338         return jobs_queue(group, timeout, callback, argument);
 339 }
 340
 341 static int require_api_cb(struct afb_api_x3 *closure, const char *name, int initialized)
 342 {
 343         struct afb_export *export = from_api_x3(closure);
 344         int rc, rc2;
 345         char *iter, *end, save;
 346
 347         /* emit a warning about unexpected require in preinit */
 348         if (export->state == Api_State_Pre_Init && initialized) {
 349                 ERROR("[API %s] requiring initialized apis in pre-init is forbiden", export->api.apiname);
 350                 errno = EINVAL;
 351                 return -1;
 352         }
 353
 354         /* scan the names in a local copy */
 355         rc = 0;
 356         iter = strdupa(name);
 357         for(;;) {
 358                 /* skip any space */
 359                 save = *iter;
 360                 while(isspace(save))
 361                         save = *++iter;
 362                 if (!save) /* at end? */
 363                         return rc;
 364
 365                 /* search for the end */
 366                 end = iter;
 367                 while (save && !isspace(save))
 368                         save = *++end;
 369                 *end = 0;
 370
 371                 /* check the required api */
 372                 if (export->state == Api_State_Pre_Init) {
 373                         rc2 = afb_apiset_require(export->declare_set, export->api.apiname, iter);
 374                         if (rc2 < 0) {
 375                                 if (rc == 0)
 376                                         WARNING("[API %s] requiring apis pre-init may lead to unexpected result", export->api.apiname);
 377                                 ERROR("[API %s] requiring api %s in pre-init failed", export->api.apiname, iter);
 378                         }
 379                 } else {
 380                         rc2 = -!((initialized ? afb_apiset_lookup_started : afb_apiset_lookup)(export->call_set, iter, 1));
 381                         if (rc2 < 0) {
 382                                 ERROR("[API %s] requiring api %s%s failed", export->api.apiname,
 383                                          iter, initialized ? " initialized" : "");
 384                         }
 385                 }
 386                 if (rc2 < 0)
 387                         rc = rc2;
 388
 389                 *end = save;
 390                 iter = end;
 391         }
 392 }
 393
 394 static int add_alias_cb(struct afb_api_x3 *closure, const char *apiname, const char *aliasname)
 395 {
 396         struct afb_export *export = from_api_x3(closure);
 397         if (!afb_api_is_valid_name(aliasname)) {
 398                 ERROR("[API %s] Can't add alias to %s: bad API name", export->api.apiname, aliasname);
 399                 errno = EINVAL;
 400                 return -1;
 401         }
 402         NOTICE("[API %s] aliasing [API %s] to [API %s]", export->api.apiname, apiname?:"<null>", aliasname);
 403         afb_export_add_alias(export, apiname, aliasname);
 404         return 0;
 405 }
 406
 407 static struct afb_api_x3 *api_new_api_cb(
 408                 struct afb_api_x3 *closure,
 409                 const char *api,
 410                 const char *info,
 411                 int noconcurrency,
 412                 int (*preinit)(void*, struct afb_api_x3 *),
 413                 void *preinit_closure)
 414 {
 415         struct afb_export *export = from_api_x3(closure);
 416         struct afb_api_v3 *apiv3 = afb_api_v3_create(
 417                                         export->declare_set, export->call_set,
 418                                         api, info, noconcurrency,
 419                                         preinit, preinit_closure, 1,
 420                                         export, NULL);
 421         return apiv3 ? to_api_x3(afb_api_v3_export(apiv3)) : NULL;
 422 }
 423
 424 #if WITH_LEGACY_BINDING_V1 || WITH_LEGACY_BINDING_V2
 425
 426 static void legacy_vverbose_v1_cb(struct afb_api_x3 *closure, int level, const char *file, int line, const char *fmt, va_list args)
 427 {
 428         vverbose_cb(closure, level, file, line, NULL, fmt, args);
 429 }
 430
 431 static struct afb_event_x1 legacy_event_x1_make_cb(struct afb_api_x3 *closure, const char *name)
 432 {
 433         struct afb_event_x2 *event = event_x2_make_cb(closure, name);
 434         return afb_evt_event_from_evtid(afb_evt_event_x2_to_evtid(event));
 435 }
 436
 437 static struct afb_req_x1 legacy_unstore_req_cb(struct afb_api_x3 *closure, struct afb_stored_req *sreq)
 438 {
 439         return afb_xreq_unstore(sreq);
 440 }
 441
 442 static const struct afb_daemon_itf_x1 daemon_itf = {
 443         .vverbose_v1 = legacy_vverbose_v1_cb,
 444         .vverbose_v2 = vverbose_cb,
 445         .event_make = legacy_event_x1_make_cb,
 446         .event_broadcast = event_broadcast_cb,
 447         .get_event_loop = get_event_loop,
 448         .get_user_bus = get_user_bus,
 449         .get_system_bus = get_system_bus,
 450         .rootdir_get_fd = afb_common_rootdir_get_fd,
 451         .rootdir_open_locale = rootdir_open_locale_cb,
 452         .queue_job = queue_job_cb,
 453         .unstore_req = legacy_unstore_req_cb,
 454         .require_api = require_api_cb,
 455         .add_alias = add_alias_cb,
 456         .new_api = api_new_api_cb,
 457 };
 458 #endif
 459
 460 #if WITH_AFB_HOOK
 461 static void hooked_vverbose_cb(struct afb_api_x3 *closure, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
 462 {
 463         struct afb_export *export = from_api_x3(closure);
 464         va_list ap;
 465         va_copy(ap, args);
 466         vverbose_cb(closure, level, file, line, function, fmt, args);
 467         afb_hook_api_vverbose(export, level, file, line, function, fmt, ap);
 468         va_end(ap);
 469 }
 470
 471 static struct afb_event_x2 *hooked_event_x2_make_cb(struct afb_api_x3 *closure, const char *name)
 472 {
 473         struct afb_export *export = from_api_x3(closure);
 474         struct afb_event_x2 *r = event_x2_make_cb(closure, name);
 475         afb_hook_api_event_make(export, name, r);
 476         return r;
 477 }
 478
 479 static int hooked_event_broadcast_cb(struct afb_api_x3 *closure, const char *name, struct json_object *object)
 480 {
 481         int r;
 482         struct afb_export *export = from_api_x3(closure);
 483         json_object_get(object);
 484         afb_hook_api_event_broadcast_before(export, name, json_object_get(object));
 485         r = event_broadcast_cb(closure, name, object);
 486         afb_hook_api_event_broadcast_after(export, name, object, r);
 487         json_object_put(object);
 488         return r;
 489 }
 490
 491 static struct sd_event *hooked_get_event_loop(struct afb_api_x3 *closure)
 492 {
 493         struct afb_export *export = from_api_x3(closure);
 494         struct sd_event *r;
 495
 496         jobs_acquire_event_manager();
 497         r = get_event_loop(closure);
 498         return afb_hook_api_get_event_loop(export, r);
 499 }
 500
 501 static struct sd_bus *hooked_get_user_bus(struct afb_api_x3 *closure)
 502 {
 503         struct afb_export *export = from_api_x3(closure);
 504         struct sd_bus *r;
 505
 506         jobs_acquire_event_manager();
 507         r = get_user_bus(closure);
 508         return afb_hook_api_get_user_bus(export, r);
 509 }
 510
 511 static struct sd_bus *hooked_get_system_bus(struct afb_api_x3 *closure)
 512 {
 513         struct afb_export *export = from_api_x3(closure);
 514         struct sd_bus *r;
 515
 516         jobs_acquire_event_manager();
 517         r = get_system_bus(closure);
 518         return afb_hook_api_get_system_bus(export, r);
 519 }
 520
 521 static int hooked_rootdir_get_fd(struct afb_api_x3 *closure)
 522 {
 523         struct afb_export *export = from_api_x3(closure);
 524         int r = afb_common_rootdir_get_fd();
 525         return afb_hook_api_rootdir_get_fd(export, r);
 526 }
 527
 528 static int hooked_rootdir_open_locale_cb(struct afb_api_x3 *closure, const char *filename, int flags, const char *locale)
 529 {
 530         struct afb_export *export = from_api_x3(closure);
 531         int r = rootdir_open_locale_cb(closure, filename, flags, locale);
 532         return afb_hook_api_rootdir_open_locale(export, filename, flags, locale, r);
 533 }
 534
 535 static int hooked_queue_job_cb(struct afb_api_x3 *closure, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout)
 536 {
 537         struct afb_export *export = from_api_x3(closure);
 538         int r = queue_job_cb(closure, callback, argument, group, timeout);
 539         return afb_hook_api_queue_job(export, callback, argument, group, timeout, r);
 540 }
 541
 542 static int hooked_require_api_cb(struct afb_api_x3 *closure, const char *name, int initialized)
 543 {
 544         int result;
 545         struct afb_export *export = from_api_x3(closure);
 546         afb_hook_api_require_api(export, name, initialized);
 547         result = require_api_cb(closure, name, initialized);
 548         return afb_hook_api_require_api_result(export, name, initialized, result);
 549 }
 550
 551 static int hooked_add_alias_cb(struct afb_api_x3 *closure, const char *apiname, const char *aliasname)
 552 {
 553         struct afb_export *export = from_api_x3(closure);
 554         int result = add_alias_cb(closure, apiname, aliasname);
 555         return afb_hook_api_add_alias(export, apiname, aliasname, result);
 556 }
 557
 558 static struct afb_api_x3 *hooked_api_new_api_cb(
 559                 struct afb_api_x3 *closure,
 560                 const char *api,
 561                 const char *info,
 562                 int noconcurrency,
 563                 int (*preinit)(void*, struct afb_api_x3 *),
 564                 void *preinit_closure)
 565 {
 566         struct afb_api_x3 *result;
 567         struct afb_export *export = from_api_x3(closure);
 568         afb_hook_api_new_api_before(export, api, info, noconcurrency);
 569         result = api_new_api_cb(closure, api, info, noconcurrency, preinit, preinit_closure);
 570         afb_hook_api_new_api_after(export, -!result, api);
 571         return result;
 572 }
 573
 574 #if WITH_LEGACY_BINDING_V1 || WITH_LEGACY_BINDING_V2
 575
 576 static void legacy_hooked_vverbose_v1_cb(struct afb_api_x3 *closure, int level, const char *file, int line, const char *fmt, va_list args)
 577 {
 578         hooked_vverbose_cb(closure, level, file, line, NULL, fmt, args);
 579 }
 580
 581 static struct afb_event_x1 legacy_hooked_event_x1_make_cb(struct afb_api_x3 *closure, const char *name)
 582 {
 583         struct afb_event_x2 *event = hooked_event_x2_make_cb(closure, name);
 584         struct afb_event_x1 e;
 585         e.closure = event;
 586         e.itf = event ? event->itf : NULL;
 587         return e;
 588 }
 589
 590 static struct afb_req_x1 legacy_hooked_unstore_req_cb(struct afb_api_x3 *closure, struct afb_stored_req *sreq)
 591 {
 592         struct afb_export *export = from_api_x3(closure);
 593         afb_hook_api_legacy_unstore_req(export, sreq);
 594         return legacy_unstore_req_cb(closure, sreq);
 595 }
 596
 597 static const struct afb_daemon_itf_x1 hooked_daemon_itf = {
 598         .vverbose_v1 = legacy_hooked_vverbose_v1_cb,
 599         .vverbose_v2 = hooked_vverbose_cb,
 600         .event_make = legacy_hooked_event_x1_make_cb,
 601         .event_broadcast = hooked_event_broadcast_cb,
 602         .get_event_loop = hooked_get_event_loop,
 603         .get_user_bus = hooked_get_user_bus,
 604         .get_system_bus = hooked_get_system_bus,
 605         .rootdir_get_fd = hooked_rootdir_get_fd,
 606         .rootdir_open_locale = hooked_rootdir_open_locale_cb,
 607         .queue_job = hooked_queue_job_cb,
 608         .unstore_req = legacy_hooked_unstore_req_cb,
 609         .require_api = hooked_require_api_cb,
 610         .add_alias = hooked_add_alias_cb,
 611         .new_api = hooked_api_new_api_cb,
 612 };
 613 #endif
 614
 615 #endif
 616
 617 /******************************************************************************
 618  ******************************************************************************
 619  ******************************************************************************
 620  ******************************************************************************
 621                                            F R O M     S V C
 622  ******************************************************************************
 623  ******************************************************************************
 624  ******************************************************************************
 625  ******************************************************************************/
 626
 627 /* the common session for services sharing their session */
 628 static struct afb_session *common_session;
 629
 630 /******************************************************************************
 631  ******************************************************************************
 632  ******************************************************************************
 633  ******************************************************************************
 634                                            F R O M     S V C
 635  ******************************************************************************
 636  ******************************************************************************
 637  ******************************************************************************
 638  ******************************************************************************/
 639
 640 static void call_x3(
 641                 struct afb_api_x3 *apix3,
 642                 const char *api,
 643                 const char *verb,
 644                 struct json_object *args,
 645                 void (*callback)(void*, struct json_object*, const char *error, const char *info, struct afb_api_x3*),
 646                 void *closure)
 647 {
 648         struct afb_export *export = from_api_x3(apix3);
 649         return afb_calls_call(export, api, verb, args, callback, closure);
 650 }
 651
 652 static int call_sync_x3(
 653                 struct afb_api_x3 *apix3,
 654                 const char *api,
 655                 const char *verb,
 656                 struct json_object *args,
 657                 struct json_object **object,
 658                 char **error,
 659                 char **info)
 660 {
 661         struct afb_export *export = from_api_x3(apix3);
 662         return afb_calls_call_sync(export, api, verb, args, object, error, info);
 663 }
 664
 665 static void legacy_call_x3(
 666                 struct afb_api_x3 *apix3,
 667                 const char *api,
 668                 const char *verb,
 669                 struct json_object *args,
 670                 void (*callback)(void*, int, struct json_object*, struct afb_api_x3*),
 671                 void *closure)
 672 {
 673         struct afb_export *export = from_api_x3(apix3);
 674         afb_calls_legacy_call_v3(export, api, verb, args, callback, closure);
 675 }
 676
 677 static int legacy_call_sync(
 678                 struct afb_api_x3 *apix3,
 679                 const char *api,
 680                 const char *verb,
 681                 struct json_object *args,
 682                 struct json_object **result)
 683 {
 684         struct afb_export *export = from_api_x3(apix3);
 685         return afb_calls_legacy_call_sync(export, api, verb, args, result);
 686 }
 687
 688 #if WITH_LEGACY_BINDING_V1 || WITH_LEGACY_BINDING_V2
 689
 690 static void legacy_call_v12(
 691                 struct afb_api_x3 *apix3,
 692                 const char *api,
 693                 const char *verb,
 694                 struct json_object *args,
 695                 void (*callback)(void*, int, struct json_object*),
 696                 void *closure)
 697 {
 698         struct afb_export *export = from_api_x3(apix3);
 699         afb_calls_legacy_call_v12(export, api, verb, args, callback, closure);
 700 }
 701
 702 /* the interface for services */
 703 static const struct afb_service_itf_x1 service_itf = {
 704         .call = legacy_call_v12,
 705         .call_sync = legacy_call_sync
 706 };
 707 #endif
 708
 709 #if WITH_AFB_HOOK
 710 static void hooked_call_x3(
 711                 struct afb_api_x3 *apix3,
 712                 const char *api,
 713                 const char *verb,
 714                 struct json_object *args,
 715                 void (*callback)(void*, struct json_object*, const char*, const char*, struct afb_api_x3*),
 716                 void *closure)
 717 {
 718         struct afb_export *export = from_api_x3(apix3);
 719         afb_calls_hooked_call(export, api, verb, args, callback, closure);
 720 }
 721
 722 static int hooked_call_sync_x3(
 723                 struct afb_api_x3 *apix3,
 724                 const char *api,
 725                 const char *verb,
 726                 struct json_object *args,
 727                 struct json_object **object,
 728                 char **error,
 729                 char **info)
 730 {
 731         struct afb_export *export = from_api_x3(apix3);
 732         return afb_calls_hooked_call_sync(export, api, verb, args, object, error, info);
 733 }
 734
 735 static void legacy_hooked_call_x3(
 736                 struct afb_api_x3 *apix3,
 737                 const char *api,
 738                 const char *verb,
 739                 struct json_object *args,
 740                 void (*callback)(void*, int, struct json_object*, struct afb_api_x3*),
 741                 void *closure)
 742 {
 743         struct afb_export *export = from_api_x3(apix3);
 744         afb_calls_legacy_hooked_call_v3(export, api, verb, args, callback, closure);
 745 }
 746
 747 static int legacy_hooked_call_sync(
 748                 struct afb_api_x3 *apix3,
 749                 const char *api,
 750                 const char *verb,
 751                 struct json_object *args,
 752                 struct json_object **result)
 753 {
 754         struct afb_export *export = from_api_x3(apix3);
 755         return afb_calls_legacy_hooked_call_sync(export, api, verb, args, result);
 756 }
 757
 758 #if WITH_LEGACY_BINDING_V1 || WITH_LEGACY_BINDING_V2
 759
 760 static void legacy_hooked_call_v12(
 761                 struct afb_api_x3 *apix3,
 762                 const char *api,
 763                 const char *verb,
 764                 struct json_object *args,
 765                 void (*callback)(void*, int, struct json_object*),
 766                 void *closure)
 767 {
 768         struct afb_export *export = from_api_x3(apix3);
 769         afb_calls_legacy_hooked_call_v12(export, api, verb, args, callback, closure);
 770 }
 771
 772 /* the interface for services */
 773 static const struct afb_service_itf_x1 hooked_service_itf = {
 774         .call = legacy_hooked_call_v12,
 775         .call_sync = legacy_hooked_call_sync
 776 };
 777 #endif
 778
 779 #endif
 780
 781 /******************************************************************************
 782  ******************************************************************************
 783  ******************************************************************************
 784  ******************************************************************************
 785                                            F R O M     D Y N A P I
 786  ******************************************************************************
 787  ******************************************************************************
 788  ******************************************************************************
 789  ******************************************************************************/
 790
 791 static int api_set_verbs_v2_cb(
 792                 struct afb_api_x3 *api,
 793                 const struct afb_verb_v2 *verbs)
 794 {
 795 #if WITH_LEGACY_BINDING_V2
 796         struct afb_export *export = from_api_x3(api);
 797
 798         if (export->unsealed) {
 799                 afb_api_v3_set_verbs_v2(export->desc.v3, verbs);
 800                 return 0;
 801         }
 802
 803         errno = EPERM;
 804 #else
 805         errno = ECANCELED;
 806 #endif
 807         return -1;
 808 }
 809
 810 static int api_set_verbs_v3_cb(
 811                 struct afb_api_x3 *api,
 812                 const struct afb_verb_v3 *verbs)
 813 {
 814         struct afb_export *export = from_api_x3(api);
 815
 816         if (!export->unsealed) {
 817                 errno = EPERM;
 818                 return -1;
 819         }
 820
 821         afb_api_v3_set_verbs_v3(export->desc.v3, verbs);
 822         return 0;
 823 }
 824
 825 static int api_add_verb_cb(
 826                 struct afb_api_x3 *api,
 827                 const char *verb,
 828                 const char *info,
 829                 void (*callback)(struct afb_req_x2 *req),
 830                 void *vcbdata,
 831                 const struct afb_auth *auth,
 832                 uint32_t session,
 833                 int glob)
 834 {
 835         struct afb_export *export = from_api_x3(api);
 836
 837         if (!export->unsealed) {
 838                 errno = EPERM;
 839                 return -1;
 840         }
 841
 842         return afb_api_v3_add_verb(export->desc.v3, verb, info, callback, vcbdata, auth, (uint16_t)session, glob);
 843 }
 844
 845 static int api_del_verb_cb(
 846                 struct afb_api_x3 *api,
 847                 const char *verb,
 848                 void **vcbdata)
 849 {
 850         struct afb_export *export = from_api_x3(api);
 851
 852         if (!export->unsealed) {
 853                 errno = EPERM;
 854                 return -1;
 855         }
 856
 857         return afb_api_v3_del_verb(export->desc.v3, verb, vcbdata);
 858 }
 859
 860 static int api_set_on_event_cb(
 861                 struct afb_api_x3 *api,
 862                 void (*onevent)(struct afb_api_x3 *api, const char *event, struct json_object *object))
 863 {
 864         struct afb_export *export = from_api_x3(api);
 865         return afb_export_handle_events_v3(export, onevent);
 866 }
 867
 868 static int api_set_on_init_cb(
 869                 struct afb_api_x3 *api,
 870                 int (*oninit)(struct afb_api_x3 *api))
 871 {
 872         struct afb_export *export = from_api_x3(api);
 873
 874         return afb_export_handle_init_v3(export, oninit);
 875 }
 876
 877 static void api_seal_cb(
 878                 struct afb_api_x3 *api)
 879 {
 880         struct afb_export *export = from_api_x3(api);
 881
 882         export->unsealed = 0;
 883 }
 884
 885 static int event_handler_add_cb(
 886                 struct afb_api_x3 *api,
 887                 const char *pattern,
 888                 void (*callback)(void *, const char*, struct json_object*, struct afb_api_x3*),
 889                 void *closure)
 890 {
 891         struct afb_export *export = from_api_x3(api);
 892
 893         return afb_export_event_handler_add(export, pattern, callback, closure);
 894 }
 895
 896 static int event_handler_del_cb(
 897                 struct afb_api_x3 *api,
 898                 const char *pattern,
 899                 void **closure)
 900 {
 901         struct afb_export *export = from_api_x3(api);
 902
 903         return afb_export_event_handler_del(export, pattern, closure);
 904 }
 905
 906 static int class_provide_cb(struct afb_api_x3 *api, const char *name)
 907 {
 908         struct afb_export *export = from_api_x3(api);
 909
 910         int rc = 0, rc2;
 911         char *iter, *end, save;
 912
 913         iter = strdupa(name);
 914         for(;;) {
 915                 /* skip any space */
 916                 save = *iter;
 917                 while(isspace(save))
 918                         save = *++iter;
 919                 if (!save) /* at end? */
 920                         return rc;
 921
 922                 /* search for the end */
 923                 end = iter;
 924                 while (save && !isspace(save))
 925                         save = *++end;
 926                 *end = 0;
 927
 928                 rc2 = afb_apiset_provide_class(export->declare_set, api->apiname, iter);
 929                 if (rc2 < 0)
 930                         rc = rc2;
 931
 932                 *end = save;
 933                 iter = end;
 934         }
 935 }
 936
 937 static int class_require_cb(struct afb_api_x3 *api, const char *name)
 938 {
 939         struct afb_export *export = from_api_x3(api);
 940
 941         int rc = 0, rc2;
 942         char *iter, *end, save;
 943
 944         iter = strdupa(name);
 945         for(;;) {
 946                 /* skip any space */
 947                 save = *iter;
 948                 while(isspace(save))
 949                         save = *++iter;
 950                 if (!save) /* at end? */
 951                         return rc;
 952
 953                 /* search for the end */
 954                 end = iter;
 955                 while (save && !isspace(save))
 956                         save = *++end;
 957                 *end = 0;
 958
 959                 rc2 = afb_apiset_require_class(export->declare_set, api->apiname, iter);
 960                 if (rc2 < 0)
 961                         rc = rc2;
 962
 963                 *end = save;
 964                 iter = end;
 965         }
 966 }
 967
 968 static int delete_api_cb(struct afb_api_x3 *api)
 969 {
 970         struct afb_export *export = from_api_x3(api);
 971
 972         if (!export->unsealed) {
 973                 errno = EPERM;
 974                 return -1;
 975         }
 976
 977         afb_export_undeclare(export);
 978         afb_export_unref(export);
 979         return 0;
 980 }
 981
 982 static struct json_object *settings_cb(struct afb_api_x3 *api)
 983 {
 984         struct afb_export *export = from_api_x3(api);
 985         struct json_object *result = export->settings;
 986         if (!result)
 987                 result = make_settings(export);
 988         return result;
 989 }
 990
 991 static const struct afb_api_x3_itf api_x3_itf = {
 992
 993         .vverbose = (void*)vverbose_cb,
 994
 995         .get_event_loop = get_event_loop,
 996         .get_user_bus = get_user_bus,
 997         .get_system_bus = get_system_bus,
 998         .rootdir_get_fd = afb_common_rootdir_get_fd,
 999         .rootdir_open_locale = rootdir_open_locale_cb,
1000         .queue_job = queue_job_cb,
1001
1002         .require_api = require_api_cb,
1003         .add_alias = add_alias_cb,
1004
1005         .event_broadcast = event_broadcast_cb,
1006         .event_make = event_x2_make_cb,
1007
1008         .legacy_call = legacy_call_x3,
1009         .legacy_call_sync = legacy_call_sync,
1010
1011         .api_new_api = api_new_api_cb,
1012         .api_set_verbs_v2 = api_set_verbs_v2_cb,
1013         .api_add_verb = api_add_verb_cb,
1014         .api_del_verb = api_del_verb_cb,
1015         .api_set_on_event = api_set_on_event_cb,
1016         .api_set_on_init = api_set_on_init_cb,
1017         .api_seal = api_seal_cb,
1018         .api_set_verbs_v3 = api_set_verbs_v3_cb,
1019         .event_handler_add = event_handler_add_cb,
1020         .event_handler_del = event_handler_del_cb,
1021
1022         .call = call_x3,
1023         .call_sync = call_sync_x3,
1024
1025         .class_provide = class_provide_cb,
1026         .class_require = class_require_cb,
1027
1028         .delete_api = delete_api_cb,
1029         .settings = settings_cb,
1030 };
1031
1032 #if WITH_AFB_HOOK
1033 static int hooked_api_set_verbs_v2_cb(
1034                 struct afb_api_x3 *api,
1035                 const struct afb_verb_v2 *verbs)
1036 {
1037         struct afb_export *export = from_api_x3(api);
1038         int result = api_set_verbs_v2_cb(api, verbs);
1039         return afb_hook_api_api_set_verbs_v2(export, result, verbs);
1040 }
1041
1042 static int hooked_api_set_verbs_v3_cb(
1043                 struct afb_api_x3 *api,
1044                 const struct afb_verb_v3 *verbs)
1045 {
1046         struct afb_export *export = from_api_x3(api);
1047         int result = api_set_verbs_v3_cb(api, verbs);
1048         return afb_hook_api_api_set_verbs_v3(export, result, verbs);
1049 }
1050
1051 static int hooked_api_add_verb_cb(
1052                 struct afb_api_x3 *api,
1053                 const char *verb,
1054                 const char *info,
1055                 void (*callback)(struct afb_req_x2 *req),
1056                 void *vcbdata,
1057                 const struct afb_auth *auth,
1058                 uint32_t session,
1059                 int glob)
1060 {
1061         struct afb_export *export = from_api_x3(api);
1062         int result = api_add_verb_cb(api, verb, info, callback, vcbdata, auth, session, glob);
1063         return afb_hook_api_api_add_verb(export, result, verb, info, glob);
1064 }
1065
1066 static int hooked_api_del_verb_cb(
1067                 struct afb_api_x3 *api,
1068                 const char *verb,
1069                 void **vcbdata)
1070 {
1071         struct afb_export *export = from_api_x3(api);
1072         int result = api_del_verb_cb(api, verb, vcbdata);
1073         return afb_hook_api_api_del_verb(export, result, verb);
1074 }
1075
1076 static int hooked_api_set_on_event_cb(
1077                 struct afb_api_x3 *api,
1078                 void (*onevent)(struct afb_api_x3 *api, const char *event, struct json_object *object))
1079 {
1080         struct afb_export *export = from_api_x3(api);
1081         int result = api_set_on_event_cb(api, onevent);
1082         return afb_hook_api_api_set_on_event(export, result);
1083 }
1084
1085 static int hooked_api_set_on_init_cb(
1086                 struct afb_api_x3 *api,
1087                 int (*oninit)(struct afb_api_x3 *api))
1088 {
1089         struct afb_export *export = from_api_x3(api);
1090         int result = api_set_on_init_cb(api, oninit);
1091         return afb_hook_api_api_set_on_init(export, result);
1092 }
1093
1094 static void hooked_api_seal_cb(
1095                 struct afb_api_x3 *api)
1096 {
1097         struct afb_export *export = from_api_x3(api);
1098         afb_hook_api_api_seal(export);
1099         api_seal_cb(api);
1100 }
1101
1102 static int hooked_event_handler_add_cb(
1103                 struct afb_api_x3 *api,
1104                 const char *pattern,
1105                 void (*callback)(void *, const char*, struct json_object*, struct afb_api_x3*),
1106                 void *closure)
1107 {
1108         struct afb_export *export = from_api_x3(api);
1109         int result = event_handler_add_cb(api, pattern, callback, closure);
1110         return afb_hook_api_event_handler_add(export, result, pattern);
1111 }
1112
1113 static int hooked_event_handler_del_cb(
1114                 struct afb_api_x3 *api,
1115                 const char *pattern,
1116                 void **closure)
1117 {
1118         struct afb_export *export = from_api_x3(api);
1119         int result = event_handler_del_cb(api, pattern, closure);
1120         return afb_hook_api_event_handler_del(export, result, pattern);
1121 }
1122
1123 static int hooked_class_provide_cb(struct afb_api_x3 *api, const char *name)
1124 {
1125         struct afb_export *export = from_api_x3(api);
1126         int result = class_provide_cb(api, name);
1127         return afb_hook_api_class_provide(export, result, name);
1128 }
1129
1130 static int hooked_class_require_cb(struct afb_api_x3 *api, const char *name)
1131 {
1132         struct afb_export *export = from_api_x3(api);
1133         int result = class_require_cb(api, name);
1134         return afb_hook_api_class_require(export, result, name);
1135 }
1136
1137 static int hooked_delete_api_cb(struct afb_api_x3 *api)
1138 {
1139         struct afb_export *export = afb_export_addref(from_api_x3(api));
1140         int result = delete_api_cb(api);
1141         result = afb_hook_api_delete_api(export, result);
1142         afb_export_unref(export);
1143         return result;
1144 }
1145
1146 static struct json_object *hooked_settings_cb(struct afb_api_x3 *api)
1147 {
1148         struct afb_export *export = from_api_x3(api);
1149         struct json_object *result = settings_cb(api);
1150         result = afb_hook_api_settings(export, result);
1151         return result;
1152 }
1153
1154 static const struct afb_api_x3_itf hooked_api_x3_itf = {
1155
1156         .vverbose = hooked_vverbose_cb,
1157
1158         .get_event_loop = hooked_get_event_loop,
1159         .get_user_bus = hooked_get_user_bus,
1160         .get_system_bus = hooked_get_system_bus,
1161         .rootdir_get_fd = hooked_rootdir_get_fd,
1162         .rootdir_open_locale = hooked_rootdir_open_locale_cb,
1163         .queue_job = hooked_queue_job_cb,
1164
1165         .require_api = hooked_require_api_cb,
1166         .add_alias = hooked_add_alias_cb,
1167
1168         .event_broadcast = hooked_event_broadcast_cb,
1169         .event_make = hooked_event_x2_make_cb,
1170
1171         .legacy_call = legacy_hooked_call_x3,
1172         .legacy_call_sync = legacy_hooked_call_sync,
1173
1174         .api_new_api = hooked_api_new_api_cb,
1175         .api_set_verbs_v2 = hooked_api_set_verbs_v2_cb,
1176         .api_add_verb = hooked_api_add_verb_cb,
1177         .api_del_verb = hooked_api_del_verb_cb,
1178         .api_set_on_event = hooked_api_set_on_event_cb,
1179         .api_set_on_init = hooked_api_set_on_init_cb,
1180         .api_seal = hooked_api_seal_cb,
1181         .api_set_verbs_v3 = hooked_api_set_verbs_v3_cb,
1182         .event_handler_add = hooked_event_handler_add_cb,
1183         .event_handler_del = hooked_event_handler_del_cb,
1184
1185         .call = hooked_call_x3,
1186         .call_sync = hooked_call_sync_x3,
1187
1188         .class_provide = hooked_class_provide_cb,
1189         .class_require = hooked_class_require_cb,
1190
1191         .delete_api = hooked_delete_api_cb,
1192         .settings = hooked_settings_cb,
1193 };
1194 #endif
1195
1196 /******************************************************************************
1197  ******************************************************************************
1198  ******************************************************************************
1199  ******************************************************************************
1200                       L I S T E N E R S
1201  ******************************************************************************
1202  ******************************************************************************
1203  ******************************************************************************
1204  ******************************************************************************/
1205
1206 /*
1207  * Propagates the event to the service
1208  */
1209 static void listener_of_events(void *closure, const char *event, int eventid, struct json_object *object)
1210 {
1211         const struct globset_handler *handler;
1212         void (*callback)(void *, const char*, struct json_object*, struct afb_api_x3*);
1213         struct afb_export *export = from_api_x3(closure);
1214
1215 #if WITH_AFB_HOOK
1216         /* hook the event before */
1217         if (export->hooksvc & afb_hook_flag_api_on_event)
1218                 afb_hook_api_on_event_before(export, event, eventid, object);
1219 #endif
1220
1221         /* transmit to specific handlers */
1222         /* search the handler */
1223         handler = export->event_handlers ? globset_match(export->event_handlers, event) : NULL;
1224         if (handler) {
1225                 callback = handler->callback;
1226 #if WITH_AFB_HOOK
1227                 if (!(export->hooksvc & afb_hook_flag_api_on_event_handler))
1228 #endif
1229                         callback(handler->closure, event, object, to_api_x3(export));
1230 #if WITH_AFB_HOOK
1231                 else {
1232                         afb_hook_api_on_event_handler_before(export, event, eventid, object, handler->pattern);
1233                         callback(handler->closure, event, object, to_api_x3(export));
1234                         afb_hook_api_on_event_handler_after(export, event, eventid, object, handler->pattern);
1235                 }
1236 #endif
1237         } else {
1238                 /* transmit to default handler */
1239                 if (export->on_any_event_v3)
1240                         export->on_any_event_v3(to_api_x3(export), event, object);
1241                 else if (export->on_any_event_v12)
1242                         export->on_any_event_v12(event, object);
1243         }
1244
1245 #if WITH_AFB_HOOK
1246         /* hook the event after */
1247         if (export->hooksvc & afb_hook_flag_api_on_event)
1248                 afb_hook_api_on_event_after(export, event, eventid, object);
1249 #endif
1250         json_object_put(object);
1251 }
1252
1253 /* the interface for events */
1254 static const struct afb_evt_itf evt_itf = {
1255         .broadcast = listener_of_events,
1256         .push = listener_of_events
1257 };
1258
1259 /* ensure an existing listener */
1260 static int ensure_listener(struct afb_export *export)
1261 {
1262         if (!export->listener) {
1263                 export->listener = afb_evt_listener_create(&evt_itf, export);
1264                 if (export->listener == NULL)
1265                         return -1;
1266         }
1267         return 0;
1268 }
1269
1270 int afb_export_event_handler_add(
1271                         struct afb_export *export,
1272                         const char *pattern,
1273                         void (*callback)(void *, const char*, struct json_object*, struct afb_api_x3*),
1274                         void *closure)
1275 {
1276         int rc;
1277
1278         /* ensure the listener */
1279         rc = ensure_listener(export);
1280         if (rc < 0)
1281                 return rc;
1282
1283         /* ensure the globset for event handling */
1284         if (!export->event_handlers) {
1285                 export->event_handlers = globset_create();
1286                 if (!export->event_handlers)
1287                         goto oom_error;
1288         }
1289
1290         /* add the handler */
1291         rc = globset_add(export->event_handlers, pattern, callback, closure);
1292         if (rc == 0)
1293                 return 0;
1294
1295         if (errno == EEXIST) {
1296                 ERROR("[API %s] event handler %s already exists", export->api.apiname, pattern);
1297                 return -1;
1298         }
1299
1300 oom_error:
1301         ERROR("[API %s] can't allocate event handler %s", export->api.apiname, pattern);
1302         return -1;
1303 }
1304
1305 int afb_export_event_handler_del(
1306                         struct afb_export *export,
1307                         const char *pattern,
1308                         void **closure)
1309 {
1310         if (export->event_handlers
1311         && !globset_del(export->event_handlers, pattern, closure))
1312                 return 0;
1313
1314         ERROR("[API %s] event handler %s not found", export->api.apiname, pattern);
1315         errno = ENOENT;
1316         return -1;
1317 }
1318
1319 /******************************************************************************
1320  ******************************************************************************
1321  ******************************************************************************
1322  ******************************************************************************
1323                                            M E R G E D
1324  ******************************************************************************
1325  ******************************************************************************
1326  ******************************************************************************
1327  ******************************************************************************/
1328
1329 static void set_interfaces(struct afb_export *export)
1330 {
1331 #if WITH_AFB_HOOK
1332         export->hookditf = afb_hook_flags_api(export->api.apiname);
1333         export->hooksvc = afb_hook_flags_api(export->api.apiname);
1334         export->api.itf = export->hookditf|export->hooksvc ? &hooked_api_x3_itf : &api_x3_itf;
1335
1336         switch (export->version) {
1337 #if WITH_LEGACY_BINDING_V1
1338         case Api_Version_1:
1339                 export->export.v1.daemon.itf = export->hookditf ? &hooked_daemon_itf : &daemon_itf;
1340                 break;
1341 #endif
1342 #if WITH_LEGACY_BINDING_V2
1343         case Api_Version_2:
1344                 export->export.v2->daemon.itf = export->hookditf ? &hooked_daemon_itf : &daemon_itf;
1345                 export->export.v2->service.itf = export->hooksvc ? &hooked_service_itf : &service_itf;
1346                 break;
1347 #endif
1348         }
1349 #else
1350
1351         export->api.itf = &api_x3_itf;
1352
1353         switch (export->version) {
1354 #if WITH_LEGACY_BINDING_V1
1355         case Api_Version_1:
1356                 export->export.v1.daemon.itf = &daemon_itf;
1357                 break;
1358 #endif
1359 #if WITH_LEGACY_BINDING_V2
1360         case Api_Version_2:
1361                 export->export.v2->daemon.itf = &daemon_itf;
1362                 export->export.v2->service.itf = &service_itf;
1363                 break;
1364 #endif
1365         }
1366
1367 #endif
1368 }
1369
1370 static struct afb_export *create(
1371                                 struct afb_apiset *declare_set,
1372                                 struct afb_apiset *call_set,
1373                                 const char *apiname,
1374                                 const char *path,
1375                                 enum afb_api_version version)
1376 {
1377         struct afb_export *export;
1378         size_t lenapi;
1379
1380         /* session shared with other exports */
1381         if (common_session == NULL) {
1382                 common_session = afb_session_create (0);
1383                 if (common_session == NULL)
1384                         return NULL;
1385         }
1386         lenapi = strlen(apiname);
1387         export = calloc(1, sizeof *export + 1 + lenapi + (path == apiname || !path ? 0 : 1 + strlen(path)));
1388         if (!export)
1389                 errno = ENOMEM;
1390         else {
1391                 export->refcount = 1;
1392                 strcpy(export->name, apiname);
1393                 export->api.apiname = export->name;
1394                 if (path == apiname)
1395                         export->path = export->name;
1396                 else if (path)
1397                         export->path = strcpy(&export->name[lenapi + 1], path);
1398                 export->version = version;
1399                 export->state = Api_State_Pre_Init;
1400                 export->session = afb_session_addref(common_session);
1401                 export->declare_set = afb_apiset_addref(declare_set);
1402                 export->call_set = afb_apiset_addref(call_set);
1403         }
1404         return export;
1405 }
1406
1407 struct afb_export *afb_export_addref(struct afb_export *export)
1408 {
1409         if (export)
1410                 __atomic_add_fetch(&export->refcount, 1, __ATOMIC_RELAXED);
1411         return export;
1412 }
1413
1414 void afb_export_unref(struct afb_export *export)
1415 {
1416         if (export && !__atomic_sub_fetch(&export->refcount, 1, __ATOMIC_RELAXED))
1417                 afb_export_destroy(export);
1418 }
1419
1420 void afb_export_destroy(struct afb_export *export)
1421 {
1422         if (export) {
1423                 if (export->event_handlers)
1424                         globset_destroy(export->event_handlers);
1425                 if (export->listener != NULL)
1426                         afb_evt_listener_unref(export->listener);
1427                 afb_session_unref(export->session);
1428                 afb_apiset_unref(export->declare_set);
1429                 afb_apiset_unref(export->call_set);
1430                 json_object_put(export->settings);
1431                 afb_export_unref(export->creator);
1432                 if (export->api.apiname != export->name)
1433                         free((void*)export->api.apiname);
1434                 free(export);
1435         }
1436 }
1437
1438 struct afb_export *afb_export_create_none_for_path(
1439                         struct afb_apiset *declare_set,
1440                         struct afb_apiset *call_set,
1441                         const char *path,
1442                         int (*creator)(void*, struct afb_api_x3*),
1443                         void *closure)
1444 {
1445         struct afb_export *export = create(declare_set, call_set, path, path, Api_Version_None);
1446         if (export) {
1447                 afb_export_logmask_set(export, logmask);
1448                 set_interfaces(export);
1449                 if (creator && creator(closure, to_api_x3(export)) < 0) {
1450                         afb_export_unref(export);
1451                         export = NULL;
1452                 }
1453         }
1454         return export;
1455 }
1456
1457 #if WITH_LEGACY_BINDING_V1
1458 struct afb_export *afb_export_create_v1(struct afb_apiset *declare_set,
1459                         struct afb_apiset *call_set,
1460                         const char *apiname,
1461                         int (*init)(struct afb_service_x1),
1462                         void (*onevent)(const char*, struct json_object*),
1463                         const char* path)
1464 {
1465         struct afb_export *export = create(declare_set, call_set, apiname, path, Api_Version_1);
1466         if (export) {
1467                 export->init.v1 = init;
1468                 export->on_any_event_v12 = onevent;
1469                 export->export.v1.mode = AFB_MODE_LOCAL;
1470                 export->export.v1.daemon.closure = to_api_x3(export);
1471                 afb_export_logmask_set(export, logmask);
1472                 set_interfaces(export);
1473         }
1474         return export;
1475 }
1476 #endif
1477
1478 #if WITH_LEGACY_BINDING_V2
1479 struct afb_export *afb_export_create_v2(struct afb_apiset *declare_set,
1480                         struct afb_apiset *call_set,
1481                         const char *apiname,
1482                         const struct afb_binding_v2 *binding,
1483                         struct afb_binding_data_v2 *data,
1484                         int (*init)(),
1485                         void (*onevent)(const char*, struct json_object*),
1486                         const char* path)
1487 {
1488         struct afb_export *export = create(declare_set, call_set, apiname, path, Api_Version_2);
1489         if (export) {
1490                 export->init.v2 = init;
1491                 export->on_any_event_v12 = onevent;
1492                 export->desc.v2 = binding;
1493                 export->export.v2 = data;
1494                 data->daemon.closure = to_api_x3(export);
1495                 data->service.closure = to_api_x3(export);
1496                 afb_export_logmask_set(export, logmask);
1497                 set_interfaces(export);
1498         }
1499         return export;
1500 }
1501 #endif
1502
1503 struct afb_export *afb_export_create_v3(struct afb_apiset *declare_set,
1504                         struct afb_apiset *call_set,
1505                         const char *apiname,
1506                         struct afb_api_v3 *apiv3,
1507                         struct afb_export* creator,
1508                         const char* path)
1509 {
1510         struct afb_export *export = create(declare_set, call_set, apiname, path, Api_Version_3);
1511         if (export) {
1512                 export->unsealed = 1;
1513                 export->desc.v3 = apiv3;
1514                 export->creator = afb_export_addref(creator);
1515                 afb_export_logmask_set(export, logmask);
1516                 set_interfaces(export);
1517         }
1518         return export;
1519 }
1520
1521 int afb_export_add_alias(struct afb_export *export, const char *apiname, const char *aliasname)
1522 {
1523         return afb_apiset_add_alias(export->declare_set, apiname ?: export->api.apiname, aliasname);
1524 }
1525
1526 int afb_export_rename(struct afb_export *export, const char *apiname)
1527 {
1528         char *name;
1529
1530         if (export->declared) {
1531                 errno = EBUSY;
1532                 return -1;
1533         }
1534
1535         /* copy the name locally */
1536         name = strdup(apiname);
1537         if (!name) {
1538                 errno = ENOMEM;
1539                 return -1;
1540         }
1541
1542         if (export->api.apiname != export->name)
1543                 free((void*)export->api.apiname);
1544         export->api.apiname = name;
1545
1546         set_interfaces(export);
1547         return 0;
1548 }
1549
1550 const char *afb_export_apiname(const struct afb_export *export)
1551 {
1552         return export->api.apiname;
1553 }
1554
1555 int afb_export_unshare_session(struct afb_export *export)
1556 {
1557         if (export->session == common_session) {
1558                 export->session = afb_session_create (0);
1559                 if (export->session)
1560                         afb_session_unref(common_session);
1561                 else {
1562                         export->session = common_session;
1563                         return -1;
1564                 }
1565         }
1566         return 0;
1567 }
1568
1569 #if WITH_LEGACY_BINDING_V1 || WITH_LEGACY_BINDING_V2
1570 int afb_export_handle_events_v12(struct afb_export *export, void (*on_event)(const char *event, struct json_object *object))
1571 {
1572         /* check version */
1573         switch (export->version) {
1574 #if WITH_LEGACY_BINDING_V1
1575         case Api_Version_1:
1576 #endif
1577 #if WITH_LEGACY_BINDING_V2
1578         case Api_Version_2:
1579                 break;
1580 #endif
1581         default:
1582                 ERROR("invalid version 12 for API %s", export->api.apiname);
1583                 errno = EINVAL;
1584                 return -1;
1585         }
1586
1587         export->on_any_event_v12 = on_event;
1588         return ensure_listener(export);
1589 }
1590 #endif
1591
1592 int afb_export_handle_events_v3(struct afb_export *export, void (*on_event)(struct afb_api_x3 *api, const char *event, struct json_object *object))
1593 {
1594         /* check version */
1595         switch (export->version) {
1596         case Api_Version_3: break;
1597         default:
1598                 ERROR("invalid version Dyn for API %s", export->api.apiname);
1599                 errno = EINVAL;
1600                 return -1;
1601         }
1602
1603         export->on_any_event_v3 = on_event;
1604         return ensure_listener(export);
1605 }
1606
1607 int afb_export_handle_init_v3(struct afb_export *export, int (*oninit)(struct afb_api_x3 *api))
1608 {
1609         if (export->state != Api_State_Pre_Init) {
1610                 ERROR("[API %s] Bad call to 'afb_api_x3_on_init', must be in PreInit", export->api.apiname);
1611                 errno = EINVAL;
1612                 return -1;
1613         }
1614
1615         export->init.v3  = oninit;
1616         return 0;
1617 }
1618
1619 #if WITH_LEGACY_BINDING_V1
1620 /*
1621  * Starts a new service (v1)
1622  */
1623 struct afb_binding_v1 *afb_export_register_v1(struct afb_export *export, struct afb_binding_v1 *(*regfun)(const struct afb_binding_interface_v1*))
1624 {
1625         return export->desc.v1 = regfun(&export->export.v1);
1626 }
1627 #endif
1628
1629 int afb_export_preinit_x3(
1630                 struct afb_export *export,
1631                 int (*preinit)(void*, struct afb_api_x3*),
1632                 void *closure)
1633 {
1634         return preinit(closure, to_api_x3(export));
1635 }
1636
1637 int afb_export_logmask_get(const struct afb_export *export)
1638 {
1639         return export->api.logmask;
1640 }
1641
1642 void afb_export_logmask_set(struct afb_export *export, int mask)
1643 {
1644         export->api.logmask = mask;
1645         switch (export->version) {
1646 #if WITH_LEGACY_BINDING_V1
1647         case Api_Version_1: export->export.v1.verbosity = verbosity_from_mask(mask); break;
1648 #endif
1649 #if WITH_LEGACY_BINDING_V2
1650         case Api_Version_2: export->export.v2->verbosity = verbosity_from_mask(mask); break;
1651 #endif
1652         }
1653 }
1654
1655 void *afb_export_userdata_get(const struct afb_export *export)
1656 {
1657         return export->api.userdata;
1658 }
1659
1660 void afb_export_userdata_set(struct afb_export *export, void *data)
1661 {
1662         export->api.userdata = data;
1663 }
1664
1665 /******************************************************************************
1666  ******************************************************************************
1667  ******************************************************************************
1668  ******************************************************************************
1669                                            N E W
1670  ******************************************************************************
1671  ******************************************************************************
1672  ******************************************************************************
1673  ******************************************************************************/
1674
1675 struct init
1676 {
1677         int return_code;
1678         struct afb_export *export;
1679 };
1680
1681 static void do_init(int sig, void *closure)
1682 {
1683         int rc = -1;
1684         struct init *init = closure;
1685         struct afb_export *export;
1686
1687         if (sig)
1688                 errno = EFAULT;
1689         else {
1690                 export = init->export;
1691                 switch (export->version) {
1692 #if WITH_LEGACY_BINDING_V1
1693                 case Api_Version_1:
1694                         rc = export->init.v1 ? export->init.v1(
1695                                 (struct afb_service_x1){
1696 #if WITH_AFB_HOOK
1697                                         .itf = &hooked_service_itf,
1698 #else
1699                                         .itf = &service_itf,
1700 #endif
1701                                         .closure = to_api_x3(export) }) : 0;
1702                         break;
1703 #endif
1704 #if WITH_LEGACY_BINDING_V2
1705                 case Api_Version_2:
1706                         rc = export->init.v2 ? export->init.v2() : 0;
1707                         break;
1708 #endif
1709                 case Api_Version_3:
1710                         rc = export->init.v3 ? export->init.v3(to_api_x3(export)) : 0;
1711                         break;
1712                 default:
1713                         errno = EINVAL;
1714                         break;
1715                 }
1716         }
1717         init->return_code = rc;
1718 };
1719
1720
1721 int afb_export_start(struct afb_export *export)
1722 {
1723         struct init init;
1724         int rc;
1725
1726         /* check state */
1727         switch (export->state) {
1728         case Api_State_Run:
1729                 return 0;
1730
1731         case Api_State_Init:
1732                 /* starting in progress: it is an error */
1733                 ERROR("Service of API %s required started while starting", export->api.apiname);
1734                 return -1;
1735
1736         default:
1737                 break;
1738         }
1739
1740         /* set event handling */
1741 #if WITH_LEGACY_BINDING_V1 || WITH_LEGACY_BINDING_V2
1742         switch (export->version) {
1743 #if WITH_LEGACY_BINDING_V1
1744         case Api_Version_1:
1745 #endif
1746 #if WITH_LEGACY_BINDING_V2
1747         case Api_Version_2:
1748 #endif
1749                 if (export->on_any_event_v12) {
1750                         rc = afb_export_handle_events_v12(export, export->on_any_event_v12);
1751                         break;
1752                 }
1753                 /*@fallthrough@*/
1754         default:
1755                 rc = 0;
1756                 break;
1757         }
1758         if (rc < 0) {
1759                 ERROR("Can't set event handler for %s", export->api.apiname);
1760                 return -1;
1761         }
1762 #endif
1763
1764 #if WITH_AFB_HOOK
1765         /* Starts the service */
1766         if (export->hooksvc & afb_hook_flag_api_start)
1767                 afb_hook_api_start_before(export);
1768 #endif
1769
1770         export->state = Api_State_Init;
1771         init.export = export;
1772         sig_monitor(0, do_init, &init);
1773         rc = init.return_code;
1774         export->state = Api_State_Run;
1775
1776 #if WITH_AFB_HOOK
1777         if (export->hooksvc & afb_hook_flag_api_start)
1778                 afb_hook_api_start_after(export, rc);
1779 #endif
1780
1781         if (rc < 0) {
1782                 /* initialisation error */
1783                 ERROR("Initialisation of service API %s failed (%d): %m", export->api.apiname, rc);
1784                 return rc;
1785         }
1786
1787         return 0;
1788 }
1789
1790 static void api_call_cb(void *closure, struct afb_xreq *xreq)
1791 {
1792         struct afb_export *export = closure;
1793
1794         xreq->request.api = to_api_x3(export);
1795
1796         switch (export->version) {
1797 #if WITH_LEGACY_BINDING_V1
1798         case Api_Version_1:
1799                 afb_api_so_v1_process_call(export->desc.v1, xreq);
1800                 break;
1801 #endif
1802 #if WITH_LEGACY_BINDING_V2
1803         case Api_Version_2:
1804                 afb_api_so_v2_process_call(export->desc.v2, xreq);
1805                 break;
1806 #endif
1807         case Api_Version_3:
1808                 afb_api_v3_process_call(export->desc.v3, xreq);
1809                 break;
1810         default:
1811                 afb_xreq_reply(xreq, NULL, "bad-api-type", NULL);
1812                 break;
1813         }
1814 }
1815
1816 static struct json_object *api_describe_cb(void *closure)
1817 {
1818         struct afb_export *export = closure;
1819         struct json_object *result;
1820
1821         switch (export->version) {
1822 #if WITH_LEGACY_BINDING_V1
1823         case Api_Version_1:
1824                 result = afb_api_so_v1_make_description_openAPIv3(export->desc.v1, export->api.apiname);
1825                 break;
1826 #endif
1827 #if WITH_LEGACY_BINDING_V2
1828         case Api_Version_2:
1829                 result = afb_api_so_v2_make_description_openAPIv3(export->desc.v2, export->api.apiname);
1830                 break;
1831 #endif
1832         case Api_Version_3:
1833                 result = afb_api_v3_make_description_openAPIv3(export->desc.v3, export->api.apiname);
1834                 break;
1835         default:
1836                 result = NULL;
1837                 break;
1838         }
1839         return result;
1840 }
1841
1842 static int api_service_start_cb(void *closure)
1843 {
1844         struct afb_export *export = closure;
1845
1846         return afb_export_start(export);
1847 }
1848
1849 #if WITH_AFB_HOOK
1850 static void api_update_hooks_cb(void *closure)
1851         __attribute__((alias("set_interfaces")));
1852
1853 void afb_export_update_hooks(struct afb_export *export)
1854         __attribute__((alias("set_interfaces")));
1855 #endif
1856
1857 static int api_get_logmask_cb(void *closure)
1858 {
1859         struct afb_export *export = closure;
1860
1861         return afb_export_logmask_get(export);
1862 }
1863
1864 static void api_set_logmask_cb(void *closure, int level)
1865 {
1866         struct afb_export *export = closure;
1867
1868         afb_export_logmask_set(export, level);
1869 }
1870
1871 static void api_unref_cb(void *closure)
1872 {
1873         struct afb_export *export = closure;
1874
1875         afb_export_unref(export);
1876 }
1877
1878 static struct afb_api_itf export_api_itf =
1879 {
1880         .call = api_call_cb,
1881         .service_start = api_service_start_cb,
1882 #if WITH_AFB_HOOK
1883         .update_hooks = api_update_hooks_cb,
1884 #endif
1885         .get_logmask = api_get_logmask_cb,
1886         .set_logmask = api_set_logmask_cb,
1887         .describe = api_describe_cb,
1888         .unref = api_unref_cb
1889 };
1890
1891 int afb_export_declare(struct afb_export *export,
1892                         int noconcurrency)
1893 {
1894         int rc;
1895         struct afb_api_item afb_api;
1896
1897         if (export->declared)
1898                 rc = 0;
1899         else {
1900                 /* init the record structure */
1901                 afb_api.closure = afb_export_addref(export);
1902                 afb_api.itf = &export_api_itf;
1903                 afb_api.group = noconcurrency ? export : NULL;
1904
1905                 /* records the binding */
1906                 rc = afb_apiset_add(export->declare_set, export->api.apiname, afb_api);
1907                 if (rc >= 0)
1908                         export->declared = 1;
1909                 else {
1910                         ERROR("can't declare export %s to set %s, ABORTING it!",
1911                                 export->api.apiname,
1912                                 afb_apiset_name(export->declare_set));
1913                         afb_export_unref(export);
1914                 }
1915         }
1916
1917         return rc;
1918 }
1919
1920 void afb_export_undeclare(struct afb_export *export)
1921 {
1922         if (export->declared) {
1923                 export->declared = 0;
1924                 afb_apiset_del(export->declare_set, export->api.apiname);
1925         }
1926 }
1927
1928 int afb_export_subscribe(struct afb_export *export, struct afb_event_x2 *event)
1929 {
1930         return afb_evt_event_x2_add_watch(export->listener, event);
1931 }
1932
1933 int afb_export_unsubscribe(struct afb_export *export, struct afb_event_x2 *event)
1934 {
1935         return afb_evt_event_x2_remove_watch(export->listener, event);
1936 }
1937
1938 void afb_export_process_xreq(struct afb_export *export, struct afb_xreq *xreq)
1939 {
1940         afb_xreq_process(xreq, export->call_set);
1941 }
1942
1943 void afb_export_context_init(struct afb_export *export, struct afb_context *context)
1944 {
1945         afb_context_init(context, export->session, NULL);
1946         context->validated = 1;
1947 }
1948