src/afb-xreq.c

   1 /*
   2  * Copyright (C) 2017 "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 <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <errno.h>
  24
  25 #include <json-c/json.h>
  26 #include <afb/afb-binding-v1.h>
  27 #include <afb/afb-binding-v2.h>
  28
  29 #include "afb-context.h"
  30 #include "afb-xreq.h"
  31 #include "afb-evt.h"
  32 #include "afb-msg-json.h"
  33 #include "afb-cred.h"
  34 #include "afb-hook.h"
  35 #include "afb-api.h"
  36 #include "afb-apiset.h"
  37 #include "afb-auth.h"
  38 #include "jobs.h"
  39 #include "verbose.h"
  40
  41 /******************************************************************************/
  42
  43 static inline void xreq_addref(struct afb_xreq *xreq)
  44 {
  45         __atomic_add_fetch(&xreq->refcount, 1, __ATOMIC_RELAXED);
  46 }
  47
  48 static inline void xreq_unref(struct afb_xreq *xreq)
  49 {
  50         if (!__atomic_sub_fetch(&xreq->refcount, 1, __ATOMIC_RELAXED)) {
  51                 if (!xreq->replied)
  52                         afb_xreq_fail(xreq, "error", "no reply");
  53                 if (xreq->hookflags)
  54                         afb_hook_xreq_end(xreq);
  55                 xreq->queryitf->unref(xreq);
  56         }
  57 }
  58
  59 /******************************************************************************/
  60
  61 extern const struct afb_req_itf xreq_itf;
  62 extern const struct afb_req_itf xreq_hooked_itf;
  63
  64 static inline struct afb_req to_req(struct afb_xreq *xreq)
  65 {
  66         return (struct afb_req){ .itf = xreq->hookflags ? &xreq_hooked_itf : &xreq_itf, .closure = xreq };
  67 }
  68
  69 /******************************************************************************/
  70
  71 struct subcall
  72 {
  73         struct afb_xreq xreq;
  74         struct afb_xreq *caller;
  75
  76         void (*completion)(struct subcall*, int, struct json_object*);
  77
  78         union {
  79                 struct {
  80                         struct jobloop *jobloop;
  81                         struct json_object *result;
  82                         int status;
  83                 };
  84                 struct {
  85                         union {
  86                                 void (*callback)(void*, int, struct json_object*);
  87                                 void (*callback2)(void*, int, struct json_object*, struct afb_req);
  88                         };
  89                         void *closure;
  90                 };
  91         };
  92 };
  93
  94 static int subcall_subscribe_cb(struct afb_xreq *xreq, struct afb_event event)
  95 {
  96         struct subcall *subcall = CONTAINER_OF_XREQ(struct subcall, xreq);
  97
  98         return afb_xreq_subscribe(subcall->caller, event);
  99 }
 100
 101 static int subcall_unsubscribe_cb(struct afb_xreq *xreq, struct afb_event event)
 102 {
 103         struct subcall *subcall = CONTAINER_OF_XREQ(struct subcall, xreq);
 104
 105         return afb_xreq_unsubscribe(subcall->caller, event);
 106 }
 107
 108 static void subcall_reply_cb(struct afb_xreq *xreq, int status, struct json_object *result)
 109 {
 110         struct subcall *subcall = CONTAINER_OF_XREQ(struct subcall, xreq);
 111
 112         subcall->completion(subcall, status, result);
 113         json_object_put(result);
 114         afb_xreq_unref(&subcall->xreq);
 115 }
 116
 117 static void subcall_destroy_cb(struct afb_xreq *xreq)
 118 {
 119         struct subcall *subcall = CONTAINER_OF_XREQ(struct subcall, xreq);
 120
 121         json_object_put(subcall->xreq.json);
 122         afb_cred_unref(subcall->xreq.cred);
 123         xreq_unref(subcall->caller);
 124         free(subcall);
 125 }
 126
 127 const struct afb_xreq_query_itf afb_xreq_subcall_itf = {
 128         .reply = subcall_reply_cb,
 129         .unref = subcall_destroy_cb,
 130         .subscribe = subcall_subscribe_cb,
 131         .unsubscribe = subcall_unsubscribe_cb
 132 };
 133
 134 static struct subcall *subcall_alloc(
 135                 struct afb_xreq *caller,
 136                 const char *api,
 137                 const char *verb,
 138                 struct json_object *args
 139 )
 140 {
 141         struct subcall *subcall;
 142         size_t lenapi, lenverb;
 143         char *copy;
 144
 145         lenapi = 1 + strlen(api);
 146         lenverb = 1 + strlen(verb);
 147         subcall = malloc(lenapi + lenverb + sizeof *subcall);
 148         if (!subcall)
 149                 ERROR("out of memory");
 150         else {
 151                 copy = (char*)&subcall[1];
 152                 memcpy(copy, api, lenapi);
 153                 api = copy;
 154                 copy = &copy[lenapi];
 155                 memcpy(copy, verb, lenverb);
 156                 verb = copy;
 157
 158                 afb_xreq_init(&subcall->xreq, &afb_xreq_subcall_itf);
 159                 afb_context_subinit(&subcall->xreq.context, &caller->context);
 160                 subcall->xreq.cred = afb_cred_addref(caller->cred);
 161                 subcall->xreq.json = args;
 162                 subcall->xreq.api = api;
 163                 subcall->xreq.verb = verb;
 164                 subcall->caller = caller;
 165                 xreq_addref(caller);
 166         }
 167         return subcall;
 168 }
 169
 170
 171 static void subcall_on_reply(struct subcall *subcall, int status, struct json_object *result)
 172 {
 173         subcall->callback(subcall->closure, status, result);
 174 }
 175
 176 static void subcall_req_on_reply(struct subcall *subcall, int status, struct json_object *result)
 177 {
 178         subcall->callback2(subcall->closure, status, result, to_req(subcall->caller));
 179 }
 180
 181 static void subcall_hooked_on_reply(struct subcall *subcall, int status, struct json_object *result)
 182 {
 183         afb_hook_xreq_subcall_result(subcall->caller, status, result);
 184         subcall_on_reply(subcall, status, result);
 185 }
 186
 187 static void subcall_req_hooked_on_reply(struct subcall *subcall, int status, struct json_object *result)
 188 {
 189         afb_hook_xreq_subcall_req_result(subcall->caller, status, result);
 190         subcall_req_on_reply(subcall, status, result);
 191 }
 192
 193 static void subcall_reply_direct_cb(void *closure, int status, struct json_object *result)
 194 {
 195         struct afb_xreq *xreq = closure;
 196
 197         if (xreq->replied) {
 198                 ERROR("subcall replied more than one time!!");
 199                 json_object_put(result);
 200         } else {
 201                 xreq->replied = 1;
 202                 subcall_reply_cb(xreq, status, result);
 203         }
 204 }
 205
 206 static void subcall_process(struct subcall *subcall, void (*completion)(struct subcall*, int, struct json_object*))
 207 {
 208         subcall->completion = completion;
 209         if (subcall->caller->queryitf->subcall) {
 210                 subcall->caller->queryitf->subcall(
 211                         subcall->caller, subcall->xreq.api, subcall->xreq.verb,
 212                         subcall->xreq.json, subcall_reply_direct_cb, &subcall->xreq);
 213         } else {
 214                 afb_xreq_addref(&subcall->xreq);
 215                 afb_xreq_process(&subcall->xreq, subcall->caller->apiset);
 216         }
 217 }
 218
 219 static void subcall(struct subcall *subcall, void (*callback)(void*, int, struct json_object*), void *cb_closure)
 220 {
 221         subcall->callback = callback;
 222         subcall->closure = cb_closure;
 223         subcall_process(subcall, subcall_on_reply);
 224 }
 225
 226 static void subcall_req(struct subcall *subcall, void (*callback)(void*, int, struct json_object*, struct afb_req), void *cb_closure)
 227 {
 228         subcall->callback2 = callback;
 229         subcall->closure = cb_closure;
 230         subcall_process(subcall, subcall_req_on_reply);
 231 }
 232
 233 static void subcall_hooked(struct subcall *subcall, void (*callback)(void*, int, struct json_object*), void *cb_closure)
 234 {
 235         subcall->callback = callback;
 236         subcall->closure = cb_closure;
 237         subcall_process(subcall, subcall_hooked_on_reply);
 238 }
 239
 240 static void subcall_req_hooked(struct subcall *subcall, void (*callback)(void*, int, struct json_object*, struct afb_req), void *cb_closure)
 241 {
 242         subcall->callback2 = callback;
 243         subcall->closure = cb_closure;
 244         subcall_process(subcall, subcall_req_hooked_on_reply);
 245 }
 246
 247 static void subcall_sync_leave(struct subcall *subcall)
 248 {
 249         struct jobloop *jobloop = __atomic_exchange_n(&subcall->jobloop, NULL, __ATOMIC_RELAXED);
 250         if (jobloop)
 251                 jobs_leave(jobloop);
 252 }
 253
 254 static void subcall_sync_reply(struct subcall *subcall, int status, struct json_object *result)
 255 {
 256         subcall->status = status;
 257         subcall->result = json_object_get(result);
 258         subcall_sync_leave(subcall);
 259 }
 260
 261 static void subcall_sync_enter(int signum, void *closure, struct jobloop *jobloop)
 262 {
 263         struct subcall *subcall = closure;
 264
 265         if (!signum) {
 266                 subcall->jobloop = jobloop;
 267                 subcall->result = NULL;
 268                 subcall->status = 0;
 269                 subcall_process(subcall, subcall_sync_reply);
 270         } else {
 271                 subcall->status = -1;
 272                 subcall_sync_leave(subcall);
 273         }
 274 }
 275
 276 static int subcallsync(struct subcall *subcall, struct json_object **result)
 277 {
 278         int rc;
 279
 280         afb_xreq_addref(&subcall->xreq);
 281         rc = jobs_enter(NULL, 0, subcall_sync_enter, subcall);
 282         *result = subcall->result;
 283         if (rc < 0 || subcall->status < 0) {
 284                 *result = *result ?: afb_msg_json_internal_error();
 285                 rc = -1;
 286         }
 287         afb_xreq_unref(&subcall->xreq);
 288         return rc;
 289 }
 290
 291 /******************************************************************************/
 292
 293 static void vinfo(void *first, void *second, const char *fmt, va_list args, void (*fun)(void*,void*,const char*))
 294 {
 295         char *info;
 296         if (fmt == NULL || vasprintf(&info, fmt, args) < 0)
 297                 info = NULL;
 298         fun(first, second, info);
 299         free(info);
 300 }
 301
 302 /******************************************************************************/
 303
 304 static struct json_object *xreq_json_cb(void *closure)
 305 {
 306         struct afb_xreq *xreq = closure;
 307         if (!xreq->json && xreq->queryitf->json)
 308                 xreq->json = xreq->queryitf->json(xreq);
 309         return xreq->json;
 310 }
 311
 312 static struct afb_arg xreq_get_cb(void *closure, const char *name)
 313 {
 314         struct afb_xreq *xreq = closure;
 315         struct afb_arg arg;
 316         struct json_object *object, *value;
 317
 318         if (xreq->queryitf->get)
 319                 arg = xreq->queryitf->get(xreq, name);
 320         else {
 321                 object = xreq_json_cb(closure);
 322                 if (json_object_object_get_ex(object, name, &value)) {
 323                         arg.name = name;
 324                         arg.value = json_object_get_string(value);
 325                 } else {
 326                         arg.name = NULL;
 327                         arg.value = NULL;
 328                 }
 329                 arg.path = NULL;
 330         }
 331         return arg;
 332 }
 333
 334 static void xreq_success_cb(void *closure, struct json_object *obj, const char *info)
 335 {
 336         struct afb_xreq *xreq = closure;
 337
 338         if (xreq->replied) {
 339                 ERROR("reply called more than one time!!");
 340                 json_object_put(obj);
 341         } else {
 342                 xreq->replied = 1;
 343                 if (xreq->queryitf->success)
 344                         xreq->queryitf->success(xreq, obj, info);
 345                 else
 346                         xreq->queryitf->reply(xreq, 0, afb_msg_json_reply_ok(info, obj, &xreq->context, NULL));
 347         }
 348 }
 349
 350 static void xreq_fail_cb(void *closure, const char *status, const char *info)
 351 {
 352         struct afb_xreq *xreq = closure;
 353
 354         if (xreq->replied) {
 355                 ERROR("reply called more than one time!!");
 356         } else {
 357                 xreq->replied = 1;
 358                 if (xreq->queryitf->fail)
 359                         xreq->queryitf->fail(xreq, status, info);
 360                 else
 361                         xreq->queryitf->reply(xreq, -1, afb_msg_json_reply_error(status, info, &xreq->context, NULL));
 362         }
 363 }
 364
 365 static void xreq_vsuccess_cb(void *closure, struct json_object *obj, const char *fmt, va_list args)
 366 {
 367         vinfo(closure, obj, fmt, args, (void*)xreq_success_cb);
 368 }
 369
 370 static void xreq_vfail_cb(void *closure, const char *status, const char *fmt, va_list args)
 371 {
 372         vinfo(closure, (void*)status, fmt, args, (void*)xreq_fail_cb);
 373 }
 374
 375 static void *xreq_context_get_cb(void *closure)
 376 {
 377         struct afb_xreq *xreq = closure;
 378         return afb_context_get(&xreq->context);
 379 }
 380
 381 static void xreq_context_set_cb(void *closure, void *value, void (*free_value)(void*))
 382 {
 383         struct afb_xreq *xreq = closure;
 384         afb_context_set(&xreq->context, value, free_value);
 385 }
 386
 387 static void xreq_addref_cb(void *closure)
 388 {
 389         struct afb_xreq *xreq = closure;
 390         xreq_addref(xreq);
 391 }
 392
 393 static void xreq_unref_cb(void *closure)
 394 {
 395         struct afb_xreq *xreq = closure;
 396         xreq_unref(xreq);
 397 }
 398
 399 static void xreq_session_close_cb(void *closure)
 400 {
 401         struct afb_xreq *xreq = closure;
 402         afb_context_close(&xreq->context);
 403 }
 404
 405 static int xreq_session_set_LOA_cb(void *closure, unsigned level)
 406 {
 407         struct afb_xreq *xreq = closure;
 408         return afb_context_change_loa(&xreq->context, level);
 409 }
 410
 411 static int xreq_subscribe_cb(void *closure, struct afb_event event)
 412 {
 413         struct afb_xreq *xreq = closure;
 414         return afb_xreq_subscribe(xreq, event);
 415 }
 416
 417 int afb_xreq_subscribe(struct afb_xreq *xreq, struct afb_event event)
 418 {
 419         if (xreq->listener)
 420                 return afb_evt_add_watch(xreq->listener, event);
 421         if (xreq->queryitf->subscribe)
 422                 return xreq->queryitf->subscribe(xreq, event);
 423         ERROR("no event listener, subscription impossible");
 424         errno = EINVAL;
 425         return -1;
 426 }
 427
 428 static int xreq_unsubscribe_cb(void *closure, struct afb_event event)
 429 {
 430         struct afb_xreq *xreq = closure;
 431         return afb_xreq_unsubscribe(xreq, event);
 432 }
 433
 434 int afb_xreq_unsubscribe(struct afb_xreq *xreq, struct afb_event event)
 435 {
 436         if (xreq->listener)
 437                 return afb_evt_remove_watch(xreq->listener, event);
 438         if (xreq->queryitf->unsubscribe)
 439                 return xreq->queryitf->unsubscribe(xreq, event);
 440         ERROR("no event listener, unsubscription impossible");
 441         errno = EINVAL;
 442         return -1;
 443 }
 444
 445 static void xreq_subcall_cb(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
 446 {
 447         struct afb_xreq *xreq = closure;
 448         struct subcall *sc;
 449
 450         sc = subcall_alloc(xreq, api, verb, args);
 451         if (sc == NULL) {
 452                 if (callback)
 453                         callback(cb_closure, 1, afb_msg_json_internal_error());
 454                 json_object_put(args);
 455         } else {
 456                 subcall(sc, callback, cb_closure);
 457         }
 458 }
 459
 460 static void xreq_subcall_req_cb(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req), void *cb_closure)
 461 {
 462         struct afb_xreq *xreq = closure;
 463         struct subcall *sc;
 464
 465         sc = subcall_alloc(xreq, api, verb, args);
 466         if (sc == NULL) {
 467                 if (callback)
 468                         callback(cb_closure, 1, afb_msg_json_internal_error(), to_req(xreq));
 469                 json_object_put(args);
 470         } else {
 471                 subcall_req(sc, callback, cb_closure);
 472         }
 473 }
 474
 475
 476 static int xreq_subcallsync_cb(void *closure, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 477 {
 478         int rc;
 479         struct subcall *sc;
 480         struct afb_xreq *xreq = closure;
 481         struct json_object *resu;
 482
 483         sc = subcall_alloc(xreq, api, verb, args);
 484         if (!sc) {
 485                 rc = -1;
 486                 resu = afb_msg_json_internal_error();
 487                 json_object_put(args);
 488         } else {
 489                 rc = subcallsync(sc, &resu);
 490         }
 491         if (result)
 492                 *result = resu;
 493         else
 494                 json_object_put(resu);
 495         return rc;
 496 }
 497
 498 static void xreq_vverbose_cb(void*closure, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
 499 {
 500         char *p;
 501         struct afb_xreq *xreq = closure;
 502
 503         if (!fmt || vasprintf(&p, fmt, args) < 0)
 504                 vverbose(level, file, line, func, fmt, args);
 505         else {
 506                 verbose(level, file, line, func, "[REQ/API %s] %s", xreq->api, p);
 507                 free(p);
 508         }
 509 }
 510
 511 static struct afb_stored_req *xreq_store_cb(void *closure)
 512 {
 513         xreq_addref_cb(closure);
 514         return closure;
 515 }
 516
 517 static int xreq_has_permission_cb(void*closure, const char *permission)
 518 {
 519         struct afb_xreq *xreq = closure;
 520         return afb_auth_has_permission(xreq, permission);
 521 }
 522
 523 /******************************************************************************/
 524
 525 static struct json_object *xreq_hooked_json_cb(void *closure)
 526 {
 527         struct json_object *r = xreq_json_cb(closure);
 528         struct afb_xreq *xreq = closure;
 529         return afb_hook_xreq_json(xreq, r);
 530 }
 531
 532 static struct afb_arg xreq_hooked_get_cb(void *closure, const char *name)
 533 {
 534         struct afb_arg r = xreq_get_cb(closure, name);
 535         struct afb_xreq *xreq = closure;
 536         return afb_hook_xreq_get(xreq, name, r);
 537 }
 538
 539 static void xreq_hooked_success_cb(void *closure, struct json_object *obj, const char *info)
 540 {
 541         struct afb_xreq *xreq = closure;
 542         afb_hook_xreq_success(xreq, obj, info);
 543         xreq_success_cb(closure, obj, info);
 544 }
 545
 546 static void xreq_hooked_fail_cb(void *closure, const char *status, const char *info)
 547 {
 548         struct afb_xreq *xreq = closure;
 549         afb_hook_xreq_fail(xreq, status, info);
 550         xreq_fail_cb(closure, status, info);
 551 }
 552
 553 static void xreq_hooked_vsuccess_cb(void *closure, struct json_object *obj, const char *fmt, va_list args)
 554 {
 555         vinfo(closure, obj, fmt, args, (void*)xreq_hooked_success_cb);
 556 }
 557
 558 static void xreq_hooked_vfail_cb(void *closure, const char *status, const char *fmt, va_list args)
 559 {
 560         vinfo(closure, (void*)status, fmt, args, (void*)xreq_hooked_fail_cb);
 561 }
 562
 563 static void *xreq_hooked_context_get_cb(void *closure)
 564 {
 565         void *r = xreq_context_get_cb(closure);
 566         struct afb_xreq *xreq = closure;
 567         return afb_hook_xreq_context_get(xreq, r);
 568 }
 569
 570 static void xreq_hooked_context_set_cb(void *closure, void *value, void (*free_value)(void*))
 571 {
 572         struct afb_xreq *xreq = closure;
 573         afb_hook_xreq_context_set(xreq, value, free_value);
 574         xreq_context_set_cb(closure, value, free_value);
 575 }
 576
 577 static void xreq_hooked_addref_cb(void *closure)
 578 {
 579         struct afb_xreq *xreq = closure;
 580         afb_hook_xreq_addref(xreq);
 581         xreq_addref_cb(closure);
 582 }
 583
 584 static void xreq_hooked_unref_cb(void *closure)
 585 {
 586         struct afb_xreq *xreq = closure;
 587         afb_hook_xreq_unref(xreq);
 588         xreq_unref_cb(closure);
 589 }
 590
 591 static void xreq_hooked_session_close_cb(void *closure)
 592 {
 593         struct afb_xreq *xreq = closure;
 594         afb_hook_xreq_session_close(xreq);
 595         xreq_session_close_cb(closure);
 596 }
 597
 598 static int xreq_hooked_session_set_LOA_cb(void *closure, unsigned level)
 599 {
 600         int r = xreq_session_set_LOA_cb(closure, level);
 601         struct afb_xreq *xreq = closure;
 602         return afb_hook_xreq_session_set_LOA(xreq, level, r);
 603 }
 604
 605 static int xreq_hooked_subscribe_cb(void *closure, struct afb_event event)
 606 {
 607         int r = xreq_subscribe_cb(closure, event);
 608         struct afb_xreq *xreq = closure;
 609         return afb_hook_xreq_subscribe(xreq, event, r);
 610 }
 611
 612 static int xreq_hooked_unsubscribe_cb(void *closure, struct afb_event event)
 613 {
 614         int r = xreq_unsubscribe_cb(closure, event);
 615         struct afb_xreq *xreq = closure;
 616         return afb_hook_xreq_unsubscribe(xreq, event, r);
 617 }
 618
 619 static void xreq_hooked_subcall_cb(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
 620 {
 621         struct afb_xreq *xreq = closure;
 622         struct subcall *sc;
 623
 624         afb_hook_xreq_subcall(xreq, api, verb, args);
 625         sc = subcall_alloc(xreq, api, verb, args);
 626         if (sc == NULL) {
 627                 if (callback)
 628                         callback(cb_closure, 1, afb_msg_json_internal_error());
 629                 json_object_put(args);
 630         } else {
 631                 subcall_hooked(sc, callback, cb_closure);
 632         }
 633 }
 634
 635 static void xreq_hooked_subcall_req_cb(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req), void *cb_closure)
 636 {
 637         struct afb_xreq *xreq = closure;
 638         struct subcall *sc;
 639
 640         afb_hook_xreq_subcall_req(xreq, api, verb, args);
 641         sc = subcall_alloc(xreq, api, verb, args);
 642         if (sc == NULL) {
 643                 if (callback)
 644                         callback(cb_closure, 1, afb_msg_json_internal_error(), to_req(xreq));
 645                 json_object_put(args);
 646         } else {
 647                 subcall_req_hooked(sc, callback, cb_closure);
 648         }
 649 }
 650
 651 static int xreq_hooked_subcallsync_cb(void *closure, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 652 {
 653         int r;
 654         struct afb_xreq *xreq = closure;
 655         afb_hook_xreq_subcallsync(xreq, api, verb, args);
 656         r = xreq_subcallsync_cb(closure, api, verb, args, result);
 657         return afb_hook_xreq_subcallsync_result(xreq, r, *result);
 658 }
 659
 660 static void xreq_hooked_vverbose_cb(void*closure, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
 661 {
 662         struct afb_xreq *xreq = closure;
 663         va_list ap;
 664         va_copy(ap, args);
 665         xreq_vverbose_cb(closure, level, file, line, func, fmt, args);
 666         afb_hook_xreq_vverbose(xreq, level, file, line, func, fmt, ap);
 667         va_end(ap);
 668 }
 669
 670 static struct afb_stored_req *xreq_hooked_store_cb(void *closure)
 671 {
 672         struct afb_xreq *xreq = closure;
 673         struct afb_stored_req *r = xreq_store_cb(closure);
 674         afb_hook_xreq_store(xreq, r);
 675         return r;
 676 }
 677
 678 static int xreq_hooked_has_permission_cb(void*closure, const char *permission)
 679 {
 680         struct afb_xreq *xreq = closure;
 681         int r = xreq_has_permission_cb(closure, permission);
 682         return afb_hook_xreq_has_permission(xreq, permission, r);
 683 }
 684
 685 /******************************************************************************/
 686
 687 const struct afb_req_itf xreq_itf = {
 688         .json = xreq_json_cb,
 689         .get = xreq_get_cb,
 690         .success = xreq_success_cb,
 691         .fail = xreq_fail_cb,
 692         .vsuccess = xreq_vsuccess_cb,
 693         .vfail = xreq_vfail_cb,
 694         .context_get = xreq_context_get_cb,
 695         .context_set = xreq_context_set_cb,
 696         .addref = xreq_addref_cb,
 697         .unref = xreq_unref_cb,
 698         .session_close = xreq_session_close_cb,
 699         .session_set_LOA = xreq_session_set_LOA_cb,
 700         .subscribe = xreq_subscribe_cb,
 701         .unsubscribe = xreq_unsubscribe_cb,
 702         .subcall = xreq_subcall_cb,
 703         .subcallsync = xreq_subcallsync_cb,
 704         .vverbose = xreq_vverbose_cb,
 705         .store = xreq_store_cb,
 706         .subcall_req = xreq_subcall_req_cb,
 707         .has_permission = xreq_has_permission_cb
 708 };
 709
 710 const struct afb_req_itf xreq_hooked_itf = {
 711         .json = xreq_hooked_json_cb,
 712         .get = xreq_hooked_get_cb,
 713         .success = xreq_hooked_success_cb,
 714         .fail = xreq_hooked_fail_cb,
 715         .vsuccess = xreq_hooked_vsuccess_cb,
 716         .vfail = xreq_hooked_vfail_cb,
 717         .context_get = xreq_hooked_context_get_cb,
 718         .context_set = xreq_hooked_context_set_cb,
 719         .addref = xreq_hooked_addref_cb,
 720         .unref = xreq_hooked_unref_cb,
 721         .session_close = xreq_hooked_session_close_cb,
 722         .session_set_LOA = xreq_hooked_session_set_LOA_cb,
 723         .subscribe = xreq_hooked_subscribe_cb,
 724         .unsubscribe = xreq_hooked_unsubscribe_cb,
 725         .subcall = xreq_hooked_subcall_cb,
 726         .subcallsync = xreq_hooked_subcallsync_cb,
 727         .vverbose = xreq_hooked_vverbose_cb,
 728         .store = xreq_hooked_store_cb,
 729         .subcall_req = xreq_hooked_subcall_req_cb,
 730         .has_permission = xreq_hooked_has_permission_cb
 731 };
 732
 733 /******************************************************************************/
 734
 735 struct afb_req afb_xreq_unstore(struct afb_stored_req *sreq)
 736 {
 737         struct afb_xreq *xreq = (struct afb_xreq *)sreq;
 738         if (xreq->hookflags)
 739                 afb_hook_xreq_unstore(xreq);
 740         return to_req(xreq);
 741 }
 742
 743 struct json_object *afb_xreq_json(struct afb_xreq *xreq)
 744 {
 745         return afb_req_json(to_req(xreq));
 746 }
 747
 748 void afb_xreq_success(struct afb_xreq *xreq, struct json_object *obj, const char *info)
 749 {
 750         afb_req_success(to_req(xreq), obj, info);
 751 }
 752
 753 void afb_xreq_success_f(struct afb_xreq *xreq, struct json_object *obj, const char *info, ...)
 754 {
 755         char *message;
 756         va_list args;
 757         va_start(args, info);
 758         if (info == NULL || vasprintf(&message, info, args) < 0)
 759                 message = NULL;
 760         va_end(args);
 761         afb_xreq_success(xreq, obj, message);
 762         free(message);
 763 }
 764
 765 void afb_xreq_fail(struct afb_xreq *xreq, const char *status, const char *info)
 766 {
 767         afb_req_fail(to_req(xreq), status, info);
 768 }
 769
 770 void afb_xreq_fail_f(struct afb_xreq *xreq, const char *status, const char *info, ...)
 771 {
 772         char *message;
 773         va_list args;
 774         va_start(args, info);
 775         if (info == NULL || vasprintf(&message, info, args) < 0)
 776                 message = NULL;
 777         va_end(args);
 778         afb_xreq_fail(xreq, status, message);
 779         free(message);
 780 }
 781
 782 const char *afb_xreq_raw(struct afb_xreq *xreq, size_t *size)
 783 {
 784         struct json_object *obj = xreq_json_cb(xreq);
 785         const char *result = json_object_to_json_string(obj);
 786         if (size != NULL)
 787                 *size = strlen(result);
 788         return result;
 789 }
 790
 791 void afb_xreq_addref(struct afb_xreq *xreq)
 792 {
 793         afb_req_addref(to_req(xreq));
 794 }
 795
 796 void afb_xreq_unref(struct afb_xreq *xreq)
 797 {
 798         afb_req_unref(to_req(xreq));
 799 }
 800
 801 void afb_xreq_unhooked_subcall(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
 802 {
 803         xreq_subcall_cb(xreq, api, verb, args, callback, cb_closure);
 804 }
 805
 806 void afb_xreq_subcall(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
 807 {
 808         afb_req_subcall(to_req(xreq), api, verb, args, callback, cb_closure);
 809 }
 810
 811 int afb_xreq_unhooked_subcall_sync(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 812 {
 813         return xreq_subcallsync_cb(xreq, api, verb, args, result);
 814 }
 815
 816 int afb_xreq_subcall_sync(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 817 {
 818         return afb_req_subcall_sync(to_req(xreq), api, verb, args, result);
 819 }
 820
 821 static int xreq_session_check_apply_v1(struct afb_xreq *xreq, int sessionflags)
 822 {
 823         int loa;
 824
 825         if ((sessionflags & (AFB_SESSION_CLOSE_V1|AFB_SESSION_RENEW_V1|AFB_SESSION_CHECK_V1|AFB_SESSION_LOA_EQ_V1)) != 0) {
 826                 if (!afb_context_check(&xreq->context)) {
 827                         afb_context_close(&xreq->context);
 828                         afb_xreq_fail_f(xreq, "denied", "invalid token's identity");
 829                         errno = EINVAL;
 830                         return -1;
 831                 }
 832         }
 833
 834         if ((sessionflags & AFB_SESSION_LOA_GE_V1) != 0) {
 835                 loa = (sessionflags >> AFB_SESSION_LOA_SHIFT_V1) & AFB_SESSION_LOA_MASK_V1;
 836                 if (!afb_context_check_loa(&xreq->context, loa)) {
 837                         afb_xreq_fail_f(xreq, "denied", "invalid LOA");
 838                         errno = EPERM;
 839                         return -1;
 840                 }
 841         }
 842
 843         if ((sessionflags & AFB_SESSION_LOA_LE_V1) != 0) {
 844                 loa = (sessionflags >> AFB_SESSION_LOA_SHIFT_V1) & AFB_SESSION_LOA_MASK_V1;
 845                 if (afb_context_check_loa(&xreq->context, loa + 1)) {
 846                         afb_xreq_fail_f(xreq, "denied", "invalid LOA");
 847                         errno = EPERM;
 848                         return -1;
 849                 }
 850         }
 851
 852         if ((sessionflags & AFB_SESSION_RENEW_V1) != 0) {
 853                 afb_context_refresh(&xreq->context);
 854         }
 855         if ((sessionflags & AFB_SESSION_CLOSE_V1) != 0) {
 856                 afb_context_change_loa(&xreq->context, 0);
 857                 afb_context_close(&xreq->context);
 858         }
 859
 860         return 0;
 861 }
 862
 863 static int xreq_session_check_apply_v2(struct afb_xreq *xreq, uint32_t sessionflags, const struct afb_auth *auth)
 864 {
 865         int loa;
 866
 867         if (sessionflags != 0) {
 868                 if (!afb_context_check(&xreq->context)) {
 869                         afb_context_close(&xreq->context);
 870                         afb_xreq_fail_f(xreq, "denied", "invalid token's identity");
 871                         errno = EINVAL;
 872                         return -1;
 873                 }
 874         }
 875
 876         loa = (int)(sessionflags & AFB_SESSION_LOA_MASK_V2);
 877         if (loa && !afb_context_check_loa(&xreq->context, loa)) {
 878                 afb_xreq_fail_f(xreq, "denied", "invalid LOA");
 879                 errno = EPERM;
 880                 return -1;
 881         }
 882
 883         if (auth && !afb_auth_check(xreq, auth)) {
 884                 afb_xreq_fail_f(xreq, "denied", "authorisation refused");
 885                 errno = EPERM;
 886                 return -1;
 887         }
 888
 889         if ((sessionflags & AFB_SESSION_REFRESH_V2) != 0) {
 890                 afb_context_refresh(&xreq->context);
 891         }
 892         if ((sessionflags & AFB_SESSION_CLOSE_V2) != 0) {
 893                 afb_context_close(&xreq->context);
 894         }
 895
 896         return 0;
 897 }
 898
 899 void afb_xreq_call_verb_v1(struct afb_xreq *xreq, const struct afb_verb_desc_v1 *verb)
 900 {
 901         if (!verb)
 902                 afb_xreq_fail_unknown_verb(xreq);
 903         else
 904                 if (!xreq_session_check_apply_v1(xreq, verb->session))
 905                         verb->callback(to_req(xreq));
 906 }
 907
 908 void afb_xreq_call_verb_v2(struct afb_xreq *xreq, const struct afb_verb_v2 *verb)
 909 {
 910         if (!verb)
 911                 afb_xreq_fail_unknown_verb(xreq);
 912         else
 913                 if (!xreq_session_check_apply_v2(xreq, verb->session, verb->auth))
 914                         verb->callback(to_req(xreq));
 915 }
 916
 917 void afb_xreq_init(struct afb_xreq *xreq, const struct afb_xreq_query_itf *queryitf)
 918 {
 919         memset(xreq, 0, sizeof *xreq);
 920         xreq->refcount = 1;
 921         xreq->queryitf = queryitf;
 922 }
 923
 924 void afb_xreq_fail_unknown_api(struct afb_xreq *xreq)
 925 {
 926         afb_xreq_fail_f(xreq, "unknown-api", "api %s not found (for verb %s)", xreq->api, xreq->verb);
 927 }
 928
 929 void afb_xreq_fail_unknown_verb(struct afb_xreq *xreq)
 930 {
 931         afb_xreq_fail_f(xreq, "unknown-verb", "verb %s unknown within api %s", xreq->verb, xreq->api);
 932 }
 933
 934 static void process_sync(struct afb_xreq *xreq)
 935 {
 936         const struct afb_api *api;
 937
 938         /* init hooking */
 939         afb_hook_init_xreq(xreq);
 940         if (xreq->hookflags)
 941                 afb_hook_xreq_begin(xreq);
 942
 943         /* search the api */
 944         api = (const struct afb_api*)xreq->context.api_key;
 945         if (api)
 946                 api->itf->call(api->closure, xreq);
 947         else {
 948                 api = afb_apiset_lookup_started(xreq->apiset, xreq->api, 1);
 949                 if (errno == ENOENT)
 950                         afb_xreq_fail_f(xreq, "unknown-api", "api %s not found", xreq->api);
 951                 else
 952                         afb_xreq_fail_f(xreq, "bad-api-state", "api %s not started correctly: %m", xreq->api);
 953         }
 954 }
 955
 956 static void process_async(int signum, void *arg)
 957 {
 958         struct afb_xreq *xreq = arg;
 959
 960         if (signum != 0) {
 961                 afb_xreq_fail_f(xreq, "aborted", "signal %s(%d) caught", strsignal(signum), signum);
 962         } else {
 963                 process_sync(xreq);
 964         }
 965         xreq_unref(xreq);
 966 }
 967
 968 void afb_xreq_process(struct afb_xreq *xreq, struct afb_apiset *apiset)
 969 {
 970         const struct afb_api *api;
 971
 972         xreq->apiset = apiset;
 973         api = afb_apiset_lookup_started(apiset, xreq->api, 1);
 974         xreq->context.api_key = (void*)api;
 975
 976         xreq_addref(xreq);
 977         if (jobs_queue(api && api->noconcurrency ? (void*)api : NULL, afb_apiset_timeout_get(apiset), process_async, xreq) < 0) {
 978                 /* TODO: allows or not to proccess it directly as when no threading? (see above) */
 979                 ERROR("can't process job with threads: %m");
 980                 afb_xreq_fail_f(xreq, "cancelled", "not able to create a job for the task");
 981                 xreq_unref(xreq);
 982         }
 983         xreq_unref(xreq);
 984 }
 985