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 #define AFB_BINDING_PRAGMA_NO_VERBOSE_MACRO
  20
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <errno.h>
  25
  26 #include <json-c/json.h>
  27 #include <afb/afb-binding-v1.h>
  28 #include <afb/afb-binding-v2.h>
  29
  30 #include "afb-context.h"
  31 #include "afb-xreq.h"
  32 #include "afb-evt.h"
  33 #include "afb-msg-json.h"
  34 #include "afb-subcall.h"
  35 #include "afb-hook.h"
  36 #include "afb-api.h"
  37 #include "afb-apiset.h"
  38 #include "afb-auth.h"
  39 #include "jobs.h"
  40 #include "verbose.h"
  41
  42 /******************************************************************************/
  43
  44 static void vinfo(void *first, void *second, const char *fmt, va_list args, void (*fun)(void*,void*,const char*))
  45 {
  46         char *info;
  47         if (fmt == NULL || vasprintf(&info, fmt, args) < 0)
  48                 info = NULL;
  49         fun(first, second, info);
  50         free(info);
  51 }
  52
  53 /******************************************************************************/
  54
  55 static struct json_object *xreq_json_cb(void *closure)
  56 {
  57         struct afb_xreq *xreq = closure;
  58         if (!xreq->json && xreq->queryitf->json)
  59                 xreq->json = xreq->queryitf->json(xreq);
  60         return xreq->json;
  61 }
  62
  63 static struct afb_arg xreq_get_cb(void *closure, const char *name)
  64 {
  65         struct afb_xreq *xreq = closure;
  66         if (xreq->queryitf->get)
  67                 return xreq->queryitf->get(xreq, name);
  68         else
  69                 return afb_msg_json_get_arg(xreq_json_cb(closure), name);
  70 }
  71
  72 static void xreq_success_cb(void *closure, struct json_object *obj, const char *info)
  73 {
  74         struct afb_xreq *xreq = closure;
  75
  76         if (xreq->replied) {
  77                 ERROR("reply called more than one time!!");
  78                 json_object_put(obj);
  79         } else {
  80                 xreq->replied = 1;
  81                 if (xreq->queryitf->success)
  82                         xreq->queryitf->success(xreq, obj, info);
  83                 else
  84                         xreq->queryitf->reply(xreq, 0, afb_msg_json_reply_ok(info, obj, &xreq->context, NULL));
  85         }
  86 }
  87
  88 static void xreq_fail_cb(void *closure, const char *status, const char *info)
  89 {
  90         struct afb_xreq *xreq = closure;
  91
  92         if (xreq->replied) {
  93                 ERROR("reply called more than one time!!");
  94         } else {
  95                 xreq->replied = 1;
  96                 if (xreq->queryitf->fail)
  97                         xreq->queryitf->fail(xreq, status, info);
  98                 else
  99                         xreq->queryitf->reply(xreq, 1, afb_msg_json_reply_error(status, info, &xreq->context, NULL));
 100         }
 101 }
 102
 103 static void xreq_vsuccess_cb(void *closure, struct json_object *obj, const char *fmt, va_list args)
 104 {
 105         vinfo(closure, obj, fmt, args, (void*)xreq_success_cb);
 106 }
 107
 108 static void xreq_vfail_cb(void *closure, const char *status, const char *fmt, va_list args)
 109 {
 110         vinfo(closure, (void*)status, fmt, args, (void*)xreq_fail_cb);
 111 }
 112
 113 static void *xreq_context_get_cb(void *closure)
 114 {
 115         struct afb_xreq *xreq = closure;
 116         return afb_context_get(&xreq->context);
 117 }
 118
 119 static void xreq_context_set_cb(void *closure, void *value, void (*free_value)(void*))
 120 {
 121         struct afb_xreq *xreq = closure;
 122         afb_context_set(&xreq->context, value, free_value);
 123 }
 124
 125 static void xreq_addref_cb(void *closure)
 126 {
 127         struct afb_xreq *xreq = closure;
 128         __atomic_add_fetch(&xreq->refcount, 1, __ATOMIC_RELAXED);
 129 }
 130
 131 static void xreq_unref_cb(void *closure)
 132 {
 133         struct afb_xreq *xreq = closure;
 134         if (!__atomic_sub_fetch(&xreq->refcount, 1, __ATOMIC_RELAXED)) {
 135                 xreq->queryitf->unref(xreq);
 136         }
 137 }
 138
 139 static void xreq_session_close_cb(void *closure)
 140 {
 141         struct afb_xreq *xreq = closure;
 142         afb_context_close(&xreq->context);
 143 }
 144
 145 static int xreq_session_set_LOA_cb(void *closure, unsigned level)
 146 {
 147         struct afb_xreq *xreq = closure;
 148         return afb_context_change_loa(&xreq->context, level);
 149 }
 150
 151 static int xreq_subscribe_cb(void *closure, struct afb_event event)
 152 {
 153         struct afb_xreq *xreq = closure;
 154         return afb_xreq_subscribe(xreq, event);
 155 }
 156
 157 int afb_xreq_subscribe(struct afb_xreq *xreq, struct afb_event event)
 158 {
 159         if (xreq->listener)
 160                 return afb_evt_add_watch(xreq->listener, event);
 161         if (xreq->queryitf->subscribe)
 162                 return xreq->queryitf->subscribe(xreq, event);
 163         ERROR("no event listener, subscription impossible");
 164         errno = EINVAL;
 165         return -1;
 166 }
 167
 168 static int xreq_unsubscribe_cb(void *closure, struct afb_event event)
 169 {
 170         struct afb_xreq *xreq = closure;
 171         return afb_xreq_unsubscribe(xreq, event);
 172 }
 173
 174 int afb_xreq_unsubscribe(struct afb_xreq *xreq, struct afb_event event)
 175 {
 176         if (xreq->listener)
 177                 return afb_evt_remove_watch(xreq->listener, event);
 178         if (xreq->queryitf->unsubscribe)
 179                 return xreq->queryitf->unsubscribe(xreq, event);
 180         ERROR("no event listener, unsubscription impossible");
 181         errno = EINVAL;
 182         return -1;
 183 }
 184
 185 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)
 186 {
 187         struct afb_xreq *xreq = closure;
 188
 189         if (xreq->queryitf->subcall) {
 190                 xreq->queryitf->subcall(xreq, api, verb, args, callback, cb_closure);
 191                 json_object_put(args);
 192         } else {
 193                 afb_subcall(xreq, api, verb, args, callback, cb_closure);
 194         }
 195 }
 196
 197 struct xreq_sync
 198 {
 199         struct afb_xreq *caller;
 200         const char *api;
 201         const char *verb;
 202         struct json_object *args;
 203         struct jobloop *jobloop;
 204         struct json_object *result;
 205         int iserror;
 206 };
 207
 208 static void xreq_sync_leave(struct xreq_sync *sync)
 209 {
 210         struct jobloop *jobloop = sync->jobloop;
 211         if (jobloop) {
 212                 sync->jobloop = NULL;
 213                 jobs_leave(jobloop);
 214         }
 215 }
 216
 217 static void xreq_sync_reply(void *closure, int iserror, struct json_object *obj)
 218 {
 219         struct xreq_sync *sync = closure;
 220
 221         sync->iserror = iserror;
 222         sync->result = json_object_get(obj);
 223         xreq_sync_leave(sync);
 224 }
 225
 226 static void xreq_sync_enter(int signum, void *closure, struct jobloop *jobloop)
 227 {
 228         struct xreq_sync *sync = closure;
 229
 230         if (!signum) {
 231                 sync->jobloop = jobloop;
 232                 xreq_subcall_cb(sync->caller, sync->api, sync->verb, json_object_get(sync->args), xreq_sync_reply, sync);
 233         } else {
 234                 sync->iserror = 1;
 235                 xreq_sync_leave(sync);
 236         }
 237 }
 238
 239 static int xreq_subcallsync_cb(void *closure, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 240 {
 241         int rc;
 242         struct xreq_sync sync;
 243         struct afb_xreq *xreq = closure;
 244
 245         sync.caller = xreq;
 246         sync.api = api;
 247         sync.verb = verb;
 248         sync.args = args;
 249         sync.jobloop = NULL;
 250         sync.result = NULL;
 251         sync.iserror = 1;
 252
 253         rc = jobs_enter(NULL, 0, xreq_sync_enter, &sync);
 254         json_object_put(args);
 255         if (rc < 0 || sync.iserror) {
 256                 *result = sync.result ? : afb_msg_json_internal_error();
 257                 return 0;
 258         }
 259         *result = sync.result;
 260         return 1;
 261 }
 262
 263 static void xreq_vverbose_cb(void*closure, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
 264 {
 265         /* TODO: improves the implementation. example: on condition make a list of log messages that will be returned */
 266         vverbose(level, file, line, func, fmt, args);
 267 }
 268
 269 /******************************************************************************/
 270
 271 static struct json_object *xreq_hooked_json_cb(void *closure)
 272 {
 273         struct json_object *r = xreq_json_cb(closure);
 274         struct afb_xreq *xreq = closure;
 275         return afb_hook_xreq_json(xreq, r);
 276 }
 277
 278 static struct afb_arg xreq_hooked_get_cb(void *closure, const char *name)
 279 {
 280         struct afb_arg r = xreq_get_cb(closure, name);
 281         struct afb_xreq *xreq = closure;
 282         return afb_hook_xreq_get(xreq, name, r);
 283 }
 284
 285 static void xreq_hooked_success_cb(void *closure, struct json_object *obj, const char *info)
 286 {
 287         struct afb_xreq *xreq = closure;
 288         afb_hook_xreq_success(xreq, obj, info);
 289         xreq_success_cb(closure, obj, info);
 290 }
 291
 292 static void xreq_hooked_fail_cb(void *closure, const char *status, const char *info)
 293 {
 294         struct afb_xreq *xreq = closure;
 295         afb_hook_xreq_fail(xreq, status, info);
 296         xreq_fail_cb(closure, status, info);
 297 }
 298
 299 static void xreq_hooked_vsuccess_cb(void *closure, struct json_object *obj, const char *fmt, va_list args)
 300 {
 301         vinfo(closure, obj, fmt, args, (void*)xreq_hooked_success_cb);
 302 }
 303
 304 static void xreq_hooked_vfail_cb(void *closure, const char *status, const char *fmt, va_list args)
 305 {
 306         vinfo(closure, (void*)status, fmt, args, (void*)xreq_hooked_fail_cb);
 307 }
 308
 309 static void *xreq_hooked_context_get_cb(void *closure)
 310 {
 311         void *r = xreq_context_get_cb(closure);
 312         struct afb_xreq *xreq = closure;
 313         return afb_hook_xreq_context_get(xreq, r);
 314 }
 315
 316 static void xreq_hooked_context_set_cb(void *closure, void *value, void (*free_value)(void*))
 317 {
 318         struct afb_xreq *xreq = closure;
 319         afb_hook_xreq_context_set(xreq, value, free_value);
 320         xreq_context_set_cb(closure, value, free_value);
 321 }
 322
 323 static void xreq_hooked_addref_cb(void *closure)
 324 {
 325         struct afb_xreq *xreq = closure;
 326         afb_hook_xreq_addref(xreq);
 327         xreq_addref_cb(closure);
 328 }
 329
 330 static void xreq_hooked_unref_cb(void *closure)
 331 {
 332         struct afb_xreq *xreq = closure;
 333         afb_hook_xreq_unref(xreq);
 334         if (!__atomic_sub_fetch(&xreq->refcount, 1, __ATOMIC_RELAXED)) {
 335                 afb_hook_xreq_end(xreq);
 336                 xreq->queryitf->unref(xreq);
 337         }
 338 }
 339
 340 static void xreq_hooked_session_close_cb(void *closure)
 341 {
 342         struct afb_xreq *xreq = closure;
 343         afb_hook_xreq_session_close(xreq);
 344         xreq_session_close_cb(closure);
 345 }
 346
 347 static int xreq_hooked_session_set_LOA_cb(void *closure, unsigned level)
 348 {
 349         int r = xreq_session_set_LOA_cb(closure, level);
 350         struct afb_xreq *xreq = closure;
 351         return afb_hook_xreq_session_set_LOA(xreq, level, r);
 352 }
 353
 354 static int xreq_hooked_subscribe_cb(void *closure, struct afb_event event)
 355 {
 356         int r = xreq_subscribe_cb(closure, event);
 357         struct afb_xreq *xreq = closure;
 358         return afb_hook_xreq_subscribe(xreq, event, r);
 359 }
 360
 361 static int xreq_hooked_unsubscribe_cb(void *closure, struct afb_event event)
 362 {
 363         int r = xreq_unsubscribe_cb(closure, event);
 364         struct afb_xreq *xreq = closure;
 365         return afb_hook_xreq_unsubscribe(xreq, event, r);
 366 }
 367
 368 struct reply
 369 {
 370         struct afb_xreq *xreq;
 371         void (*callback)(void*, int, struct json_object*);
 372         void *closure;
 373 };
 374
 375 static void xreq_hooked_subcall_reply_cb(void *closure, int iserror, struct json_object *result)
 376 {
 377         struct reply *reply = closure;
 378
 379         afb_hook_xreq_subcall_result(reply->xreq, iserror, result);
 380         reply->callback(reply->closure, iserror, result);
 381         free(reply);
 382 }
 383
 384 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)
 385 {
 386         struct reply *reply = malloc(sizeof *reply);
 387         struct afb_xreq *xreq = closure;
 388         afb_hook_xreq_subcall(xreq, api, verb, args);
 389         if (reply) {
 390                 reply->xreq = xreq;
 391                 reply->callback = callback;
 392                 reply->closure = cb_closure;
 393                 xreq_subcall_cb(closure, api, verb, args, xreq_hooked_subcall_reply_cb, reply);
 394         } else {
 395                 ERROR("out of memory");
 396                 xreq_subcall_cb(closure, api, verb, args, callback, cb_closure);
 397         }
 398 }
 399
 400 static int xreq_hooked_subcallsync_cb(void *closure, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 401 {
 402         int r;
 403         struct afb_xreq *xreq = closure;
 404         afb_hook_xreq_subcallsync(xreq, api, verb, args);
 405         r = xreq_subcallsync_cb(closure, api, verb, args, result);
 406         return afb_hook_xreq_subcallsync_result(xreq, r, *result);
 407 }
 408
 409 static void xreq_hooked_vverbose_cb(void*closure, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
 410 {
 411         struct afb_xreq *xreq = closure;
 412         va_list ap;
 413         va_copy(ap, args);
 414         xreq_vverbose_cb(closure, level, file, line, func, fmt, args);
 415         afb_hook_xreq_vverbose(xreq, level, file, line, func, fmt, ap);
 416         va_end(ap);
 417 }
 418
 419 /******************************************************************************/
 420
 421 const struct afb_req_itf xreq_itf = {
 422         .json = xreq_json_cb,
 423         .get = xreq_get_cb,
 424         .success = xreq_success_cb,
 425         .fail = xreq_fail_cb,
 426         .vsuccess = xreq_vsuccess_cb,
 427         .vfail = xreq_vfail_cb,
 428         .context_get = xreq_context_get_cb,
 429         .context_set = xreq_context_set_cb,
 430         .addref = xreq_addref_cb,
 431         .unref = xreq_unref_cb,
 432         .session_close = xreq_session_close_cb,
 433         .session_set_LOA = xreq_session_set_LOA_cb,
 434         .subscribe = xreq_subscribe_cb,
 435         .unsubscribe = xreq_unsubscribe_cb,
 436         .subcall = xreq_subcall_cb,
 437         .subcallsync = xreq_subcallsync_cb,
 438         .vverbose = xreq_vverbose_cb
 439 };
 440
 441 const struct afb_req_itf xreq_hooked_itf = {
 442         .json = xreq_hooked_json_cb,
 443         .get = xreq_hooked_get_cb,
 444         .success = xreq_hooked_success_cb,
 445         .fail = xreq_hooked_fail_cb,
 446         .vsuccess = xreq_hooked_vsuccess_cb,
 447         .vfail = xreq_hooked_vfail_cb,
 448         .context_get = xreq_hooked_context_get_cb,
 449         .context_set = xreq_hooked_context_set_cb,
 450         .addref = xreq_hooked_addref_cb,
 451         .unref = xreq_hooked_unref_cb,
 452         .session_close = xreq_hooked_session_close_cb,
 453         .session_set_LOA = xreq_hooked_session_set_LOA_cb,
 454         .subscribe = xreq_hooked_subscribe_cb,
 455         .unsubscribe = xreq_hooked_unsubscribe_cb,
 456         .subcall = xreq_hooked_subcall_cb,
 457         .subcallsync = xreq_hooked_subcallsync_cb,
 458         .vverbose = xreq_hooked_vverbose_cb
 459 };
 460
 461 static inline struct afb_req to_req(struct afb_xreq *xreq)
 462 {
 463         return (struct afb_req){ .itf = xreq->hookflags ? &xreq_hooked_itf : &xreq_itf, .closure = xreq };
 464 }
 465
 466 /******************************************************************************/
 467
 468 struct json_object *afb_xreq_json(struct afb_xreq *xreq)
 469 {
 470         return afb_req_json(to_req(xreq));
 471 }
 472
 473 void afb_xreq_success(struct afb_xreq *xreq, struct json_object *obj, const char *info)
 474 {
 475         afb_req_success(to_req(xreq), obj, info);
 476 }
 477
 478 void afb_xreq_success_f(struct afb_xreq *xreq, struct json_object *obj, const char *info, ...)
 479 {
 480         char *message;
 481         va_list args;
 482         va_start(args, info);
 483         if (info == NULL || vasprintf(&message, info, args) < 0)
 484                 message = NULL;
 485         va_end(args);
 486         afb_xreq_success(xreq, obj, message);
 487         free(message);
 488 }
 489
 490 void afb_xreq_fail(struct afb_xreq *xreq, const char *status, const char *info)
 491 {
 492         afb_req_fail(to_req(xreq), status, info);
 493 }
 494
 495 void afb_xreq_fail_f(struct afb_xreq *xreq, const char *status, const char *info, ...)
 496 {
 497         char *message;
 498         va_list args;
 499         va_start(args, info);
 500         if (info == NULL || vasprintf(&message, info, args) < 0)
 501                 message = NULL;
 502         va_end(args);
 503         afb_xreq_fail(xreq, status, message);
 504         free(message);
 505 }
 506
 507 const char *afb_xreq_raw(struct afb_xreq *xreq, size_t *size)
 508 {
 509         struct json_object *obj = xreq_json_cb(xreq);
 510         const char *result = json_object_to_json_string(obj);
 511         if (size != NULL)
 512                 *size = strlen(result);
 513         return result;
 514 }
 515
 516 void afb_xreq_addref(struct afb_xreq *xreq)
 517 {
 518         afb_req_addref(to_req(xreq));
 519 }
 520
 521 void afb_xreq_unref(struct afb_xreq *xreq)
 522 {
 523         afb_req_unref(to_req(xreq));
 524 }
 525
 526 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)
 527 {
 528         xreq_subcall_cb(xreq, api, verb, args, callback, cb_closure);
 529 }
 530
 531 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)
 532 {
 533         afb_req_subcall(to_req(xreq), api, verb, args, callback, cb_closure);
 534 }
 535
 536 int afb_xreq_unhooked_subcall_sync(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 537 {
 538         return xreq_subcallsync_cb(xreq, api, verb, args, result);
 539 }
 540
 541 int afb_xreq_subcall_sync(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 542 {
 543         return afb_req_subcall_sync(to_req(xreq), api, verb, args, result);
 544 }
 545
 546 static int xreq_session_check_apply_v1(struct afb_xreq *xreq, int sessionflags)
 547 {
 548         int loa;
 549
 550         if ((sessionflags & (AFB_SESSION_CLOSE_V1|AFB_SESSION_RENEW_V1|AFB_SESSION_CHECK_V1|AFB_SESSION_LOA_EQ_V1)) != 0) {
 551                 if (!afb_context_check(&xreq->context)) {
 552                         afb_context_close(&xreq->context);
 553                         afb_xreq_fail_f(xreq, "denied", "invalid token's identity");
 554                         errno = EINVAL;
 555                         return -1;
 556                 }
 557         }
 558
 559         if ((sessionflags & AFB_SESSION_LOA_GE_V1) != 0) {
 560                 loa = (sessionflags >> AFB_SESSION_LOA_SHIFT_V1) & AFB_SESSION_LOA_MASK_V1;
 561                 if (!afb_context_check_loa(&xreq->context, loa)) {
 562                         afb_xreq_fail_f(xreq, "denied", "invalid LOA");
 563                         errno = EPERM;
 564                         return -1;
 565                 }
 566         }
 567
 568         if ((sessionflags & AFB_SESSION_LOA_LE_V1) != 0) {
 569                 loa = (sessionflags >> AFB_SESSION_LOA_SHIFT_V1) & AFB_SESSION_LOA_MASK_V1;
 570                 if (afb_context_check_loa(&xreq->context, loa + 1)) {
 571                         afb_xreq_fail_f(xreq, "denied", "invalid LOA");
 572                         errno = EPERM;
 573                         return -1;
 574                 }
 575         }
 576
 577         if ((sessionflags & AFB_SESSION_RENEW_V1) != 0) {
 578                 afb_context_refresh(&xreq->context);
 579         }
 580         if ((sessionflags & AFB_SESSION_CLOSE_V1) != 0) {
 581                 afb_context_change_loa(&xreq->context, 0);
 582                 afb_context_close(&xreq->context);
 583         }
 584
 585         return 0;
 586 }
 587
 588 static int xreq_session_check_apply_v2(struct afb_xreq *xreq, uint32_t sessionflags, const struct afb_auth *auth)
 589 {
 590         int loa;
 591
 592         if (sessionflags != 0) {
 593                 if (!afb_context_check(&xreq->context)) {
 594                         afb_context_close(&xreq->context);
 595                         afb_xreq_fail_f(xreq, "denied", "invalid token's identity");
 596                         errno = EINVAL;
 597                         return -1;
 598                 }
 599         }
 600
 601         loa = (int)(sessionflags & AFB_SESSION_LOA_MASK_V2);
 602         if (loa && !afb_context_check_loa(&xreq->context, loa)) {
 603                 afb_xreq_fail_f(xreq, "denied", "invalid LOA");
 604                 errno = EPERM;
 605                 return -1;
 606         }
 607
 608         if (auth && !afb_auth_check(auth, xreq)) {
 609                 afb_xreq_fail_f(xreq, "denied", "authorisation refused");
 610                 errno = EPERM;
 611                 return -1;
 612         }
 613
 614         if ((sessionflags & AFB_SESSION_REFRESH_V2) != 0) {
 615                 afb_context_refresh(&xreq->context);
 616         }
 617         if ((sessionflags & AFB_SESSION_CLOSE_V2) != 0) {
 618                 afb_context_close(&xreq->context);
 619         }
 620
 621         return 0;
 622 }
 623
 624 void afb_xreq_call_verb_v1(struct afb_xreq *xreq, const struct afb_verb_desc_v1 *verb)
 625 {
 626         if (!verb)
 627                 afb_xreq_fail_unknown_verb(xreq);
 628         else
 629                 if (!xreq_session_check_apply_v1(xreq, verb->session))
 630                         verb->callback(to_req(xreq));
 631 }
 632
 633 void afb_xreq_call_verb_v2(struct afb_xreq *xreq, const struct afb_verb_v2 *verb)
 634 {
 635         if (!verb)
 636                 afb_xreq_fail_unknown_verb(xreq);
 637         else
 638                 if (!xreq_session_check_apply_v2(xreq, verb->session, verb->auth))
 639                         verb->callback(to_req(xreq));
 640 }
 641
 642 void afb_xreq_init(struct afb_xreq *xreq, const struct afb_xreq_query_itf *queryitf)
 643 {
 644         memset(xreq, 0, sizeof *xreq);
 645         xreq->refcount = 1;
 646         xreq->queryitf = queryitf;
 647 }
 648
 649 void afb_xreq_fail_unknown_api(struct afb_xreq *xreq)
 650 {
 651         afb_xreq_fail_f(xreq, "unknown-api", "api %s not found (for verb %s)", xreq->api, xreq->verb);
 652 }
 653
 654 void afb_xreq_fail_unknown_verb(struct afb_xreq *xreq)
 655 {
 656         afb_xreq_fail_f(xreq, "unknown-verb", "verb %s unknown within api %s", xreq->verb, xreq->api);
 657 }
 658
 659 static void process_sync(struct afb_xreq *xreq)
 660 {
 661         struct afb_api api;
 662
 663         /* init hooking */
 664         afb_hook_init_xreq(xreq);
 665         if (xreq->hookflags)
 666                 afb_hook_xreq_begin(xreq);
 667
 668         /* search the api */
 669         if (afb_apiset_get_started(xreq->apiset, xreq->api, &api) < 0) {
 670                 if (errno == ENOENT)
 671                         afb_xreq_fail_f(xreq, "unknown-api", "api %s not found", xreq->api);
 672                 else
 673                         afb_xreq_fail_f(xreq, "bad-api-state", "api %s not started correctly: %m", xreq->api);
 674         } else {
 675                 xreq->context.api_key = api.closure;
 676                 api.itf->call(api.closure, xreq);
 677         }
 678 }
 679
 680 static void process_async(int signum, void *arg)
 681 {
 682         struct afb_xreq *xreq = arg;
 683
 684         if (signum != 0) {
 685                 afb_xreq_fail_f(xreq, "aborted", "signal %s(%d) caught", strsignal(signum), signum);
 686         } else {
 687                 process_sync(xreq);
 688         }
 689         afb_xreq_unref(xreq);
 690 }
 691
 692 void afb_xreq_process(struct afb_xreq *xreq, struct afb_apiset *apiset)
 693 {
 694         xreq->apiset = apiset;
 695
 696         afb_xreq_addref(xreq);
 697         if (jobs_queue(NULL, afb_apiset_timeout_get(apiset), process_async, xreq) < 0) {
 698                 /* TODO: allows or not to proccess it directly as when no threading? (see above) */
 699                 ERROR("can't process job with threads: %m");
 700                 afb_xreq_fail_f(xreq, "cancelled", "not able to create a job for the task");
 701                 afb_xreq_unref(xreq);
 702         }
 703         afb_xreq_unref(xreq);
 704 }
 705