src/afb-xreq.c

   1 /*
   2  * Copyright (C) 2017-2019 "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 <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <errno.h>
  24 #include <stdarg.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 #include <afb/afb-binding-v1.h>
  32 #include <afb/afb-binding-v2.h>
  33 #include <afb/afb-binding-v3.h>
  34 #include <afb/afb-req-x2.h>
  35
  36 #include "afb-api.h"
  37 #include "afb-apiset.h"
  38 #include "afb-auth.h"
  39 #include "afb-calls.h"
  40 #include "afb-context.h"
  41 #include "afb-evt.h"
  42 #include "afb-cred.h"
  43 #include "afb-hook.h"
  44 #include "afb-msg-json.h"
  45 #include "afb-xreq.h"
  46
  47 #include "jobs.h"
  48 #include "verbose.h"
  49
  50 /******************************************************************************/
  51
  52 static void xreq_finalize(struct afb_xreq *xreq)
  53 {
  54         if (!xreq->replied)
  55                 afb_xreq_reply(xreq, NULL, "error", "no reply");
  56 #if WITH_AFB_HOOK
  57         if (xreq->hookflags)
  58                 afb_hook_xreq_end(xreq);
  59 #endif
  60         if (xreq->caller)
  61                 afb_xreq_unhooked_unref(xreq->caller);
  62         xreq->queryitf->unref(xreq);
  63 }
  64
  65 inline void afb_xreq_unhooked_addref(struct afb_xreq *xreq)
  66 {
  67         __atomic_add_fetch(&xreq->refcount, 1, __ATOMIC_RELAXED);
  68 }
  69
  70 inline void afb_xreq_unhooked_unref(struct afb_xreq *xreq)
  71 {
  72         if (!__atomic_sub_fetch(&xreq->refcount, 1, __ATOMIC_RELAXED))
  73                 xreq_finalize(xreq);
  74 }
  75
  76 /******************************************************************************/
  77
  78 struct json_object *afb_xreq_unhooked_json(struct afb_xreq *xreq)
  79 {
  80         if (!xreq->json && xreq->queryitf->json)
  81                 xreq->json = xreq->queryitf->json(xreq);
  82         return xreq->json;
  83 }
  84
  85 static struct json_object *xreq_json_cb(struct afb_req_x2 *closure)
  86 {
  87         struct afb_xreq *xreq = xreq_from_req_x2(closure);
  88         return afb_xreq_unhooked_json(xreq);
  89 }
  90
  91 static struct afb_arg xreq_get_cb(struct afb_req_x2 *closure, const char *name)
  92 {
  93         struct afb_xreq *xreq = xreq_from_req_x2(closure);
  94         struct afb_arg arg;
  95         struct json_object *object, *value;
  96
  97         if (xreq->queryitf->get)
  98                 arg = xreq->queryitf->get(xreq, name);
  99         else {
 100                 object = xreq_json_cb(closure);
 101                 if (json_object_object_get_ex(object, name, &value)) {
 102                         arg.name = name;
 103                         arg.value = json_object_get_string(value);
 104                 } else {
 105                         arg.name = NULL;
 106                         arg.value = NULL;
 107                 }
 108                 arg.path = NULL;
 109         }
 110         return arg;
 111 }
 112
 113 static void xreq_reply_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *error, const char *info)
 114 {
 115         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 116
 117         if (xreq->replied) {
 118                 ERROR("reply called more than one time!!");
 119                 json_object_put(obj);
 120         } else {
 121                 xreq->replied = 1;
 122                 xreq->queryitf->reply(xreq, obj, error, info);
 123         }
 124 }
 125
 126 static void xreq_vreply_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *error, const char *fmt, va_list args)
 127 {
 128         char *info;
 129         if (fmt == NULL || vasprintf(&info, fmt, args) < 0)
 130                 info = NULL;
 131         xreq_reply_cb(closure, obj, error, info);
 132         free(info);
 133 }
 134
 135 static void xreq_legacy_success_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *info)
 136 {
 137         xreq_reply_cb(closure, obj, NULL, info);
 138 }
 139
 140 static void xreq_legacy_fail_cb(struct afb_req_x2 *closure, const char *status, const char *info)
 141 {
 142         xreq_reply_cb(closure, NULL, status, info);
 143 }
 144
 145 static void xreq_legacy_vsuccess_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *fmt, va_list args)
 146 {
 147         xreq_vreply_cb(closure, obj, NULL, fmt, args);
 148 }
 149
 150 static void xreq_legacy_vfail_cb(struct afb_req_x2 *closure, const char *status, const char *fmt, va_list args)
 151 {
 152         xreq_vreply_cb(closure, NULL, status, fmt, args);
 153 }
 154
 155 static void *xreq_legacy_context_get_cb(struct afb_req_x2 *closure)
 156 {
 157         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 158         return afb_context_get(&xreq->context);
 159 }
 160
 161 static void xreq_legacy_context_set_cb(struct afb_req_x2 *closure, void *value, void (*free_value)(void*))
 162 {
 163         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 164         afb_context_set(&xreq->context, value, free_value);
 165 }
 166
 167 static struct afb_req_x2 *xreq_addref_cb(struct afb_req_x2 *closure)
 168 {
 169         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 170         afb_xreq_unhooked_addref(xreq);
 171         return closure;
 172 }
 173
 174 static void xreq_unref_cb(struct afb_req_x2 *closure)
 175 {
 176         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 177         afb_xreq_unhooked_unref(xreq);
 178 }
 179
 180 static void xreq_session_close_cb(struct afb_req_x2 *closure)
 181 {
 182         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 183         afb_context_close(&xreq->context);
 184 }
 185
 186 static int xreq_session_set_LOA_cb(struct afb_req_x2 *closure, unsigned level)
 187 {
 188         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 189         return afb_context_change_loa(&xreq->context, level);
 190 }
 191
 192 static int xreq_subscribe_event_x2_cb(struct afb_req_x2 *closure, struct afb_event_x2 *event)
 193 {
 194         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 195         return afb_xreq_subscribe(xreq, event);
 196 }
 197
 198 static int xreq_legacy_subscribe_event_x1_cb(struct afb_req_x2 *closure, struct afb_event_x1 event)
 199 {
 200         return xreq_subscribe_event_x2_cb(closure, afb_event_x1_to_event_x2(event));
 201 }
 202
 203 int afb_xreq_subscribe(struct afb_xreq *xreq, struct afb_event_x2 *event)
 204 {
 205         if (xreq->replied) {
 206                 ERROR("request replied, subscription impossible");
 207                 errno = EINVAL;
 208         } else {
 209                 if (xreq->queryitf->subscribe)
 210                         return xreq->queryitf->subscribe(xreq, event);
 211                 ERROR("no event listener, subscription impossible");
 212                 errno = ENOTSUP;
 213         }
 214         return -1;
 215 }
 216
 217 static int xreq_unsubscribe_event_x2_cb(struct afb_req_x2 *closure, struct afb_event_x2 *event)
 218 {
 219         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 220         return afb_xreq_unsubscribe(xreq, event);
 221 }
 222
 223 static int xreq_legacy_unsubscribe_event_x1_cb(struct afb_req_x2 *closure, struct afb_event_x1 event)
 224 {
 225         return xreq_unsubscribe_event_x2_cb(closure, afb_event_x1_to_event_x2(event));
 226 }
 227
 228 int afb_xreq_unsubscribe(struct afb_xreq *xreq, struct afb_event_x2 *event)
 229 {
 230         if (xreq->replied) {
 231                 ERROR("request replied, unsubscription impossible");
 232                 errno = EINVAL;
 233         } else {
 234                 if (xreq->queryitf->unsubscribe)
 235                         return xreq->queryitf->unsubscribe(xreq, event);
 236                 ERROR("no event listener, unsubscription impossible");
 237                 errno = ENOTSUP;
 238         }
 239         return -1;
 240 }
 241
 242 static void xreq_legacy_subcall_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *closure)
 243 {
 244         struct afb_xreq *xreq = xreq_from_req_x2(req);
 245         return afb_calls_legacy_subcall_v1(xreq, api, verb, args, callback, closure);
 246 }
 247
 248 static void xreq_legacy_subcall_req_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req_x1), void *closure)
 249 {
 250         struct afb_xreq *xreq = xreq_from_req_x2(req);
 251         return afb_calls_legacy_subcall_v2(xreq, api, verb, args, callback, closure);
 252 }
 253
 254 static void xreq_legacy_subcall_request_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req_x2*), void *closure)
 255 {
 256         struct afb_xreq *xreq = xreq_from_req_x2(req);
 257         return afb_calls_legacy_subcall_v3(xreq, api, verb, args, callback, closure);
 258 }
 259
 260
 261 static int xreq_legacy_subcallsync_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 262 {
 263         struct afb_xreq *xreq = xreq_from_req_x2(req);
 264         return afb_calls_legacy_subcall_sync(xreq, api, verb, args, result);
 265 }
 266
 267 static void xreq_vverbose_cb(struct afb_req_x2 *closure, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
 268 {
 269         char *p;
 270         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 271
 272         if (!fmt || vasprintf(&p, fmt, args) < 0)
 273                 vverbose(level, file, line, func, fmt, args);
 274         else {
 275                 verbose(level, file, line, func, "[REQ/API %s] %s", xreq->request.called_api, p);
 276                 free(p);
 277         }
 278 }
 279
 280 static struct afb_stored_req *xreq_legacy_store_cb(struct afb_req_x2 *closure)
 281 {
 282         xreq_addref_cb(closure);
 283         return (struct afb_stored_req*)closure;
 284 }
 285
 286 static int xreq_has_permission_cb(struct afb_req_x2 *closure, const char *permission)
 287 {
 288         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 289         return afb_auth_has_permission(xreq, permission);
 290 }
 291
 292 static char *xreq_get_application_id_cb(struct afb_req_x2 *closure)
 293 {
 294         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 295         return xreq->cred && xreq->cred->id ? strdup(xreq->cred->id) : NULL;
 296 }
 297
 298 static void *xreq_context_make_cb(struct afb_req_x2 *closure, int replace, void *(*create_value)(void*), void (*free_value)(void*), void *create_closure)
 299 {
 300         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 301         return afb_context_make(&xreq->context, replace, create_value, free_value, create_closure);
 302 }
 303
 304 static int xreq_get_uid_cb(struct afb_req_x2 *closure)
 305 {
 306         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 307         return xreq->cred && xreq->cred->id ? (int)xreq->cred->uid : -1;
 308 }
 309
 310 static struct json_object *xreq_get_client_info_cb(struct afb_req_x2 *closure)
 311 {
 312         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 313         struct json_object *r = json_object_new_object();
 314         if (xreq->cred && xreq->cred->id) {
 315                 json_object_object_add(r, "uid", json_object_new_int(xreq->cred->uid));
 316                 json_object_object_add(r, "gid", json_object_new_int(xreq->cred->gid));
 317                 json_object_object_add(r, "pid", json_object_new_int(xreq->cred->pid));
 318                 json_object_object_add(r, "user", json_object_new_string(xreq->cred->user));
 319                 json_object_object_add(r, "label", json_object_new_string(xreq->cred->label));
 320                 json_object_object_add(r, "id", json_object_new_string(xreq->cred->id));
 321         }
 322         if (xreq->context.session) {
 323                 json_object_object_add(r, "uuid", json_object_new_string(afb_context_uuid(&xreq->context)));
 324                 json_object_object_add(r, "LOA", json_object_new_int(afb_context_get_loa(&xreq->context)));
 325         }
 326         return r;
 327 }
 328
 329 static void xreq_subcall_cb(
 330                                 struct afb_req_x2 *req,
 331                                 const char *api,
 332                                 const char *verb,
 333                                 struct json_object *args,
 334                                 int flags,
 335                                 void (*callback)(void *closure, struct json_object *object, const char *error, const char * info, struct afb_req_x2 *req),
 336                                 void *closure)
 337 {
 338         struct afb_xreq *xreq = xreq_from_req_x2(req);
 339         afb_calls_subcall(xreq, api, verb, args, flags, callback, closure);
 340 }
 341
 342 static int xreq_subcallsync_cb(
 343                                 struct afb_req_x2 *req,
 344                                 const char *api,
 345                                 const char *verb,
 346                                 struct json_object *args,
 347                                 int flags,
 348                                 struct json_object **object,
 349                                 char **error,
 350                                 char **info)
 351 {
 352         struct afb_xreq *xreq = xreq_from_req_x2(req);
 353         return afb_calls_subcall_sync(xreq, api, verb, args, flags, object, error, info);
 354 }
 355
 356 /******************************************************************************/
 357
 358 const struct afb_req_x2_itf xreq_itf = {
 359         .json = xreq_json_cb,
 360         .get = xreq_get_cb,
 361         .legacy_success = xreq_legacy_success_cb,
 362         .legacy_fail = xreq_legacy_fail_cb,
 363         .legacy_vsuccess = xreq_legacy_vsuccess_cb,
 364         .legacy_vfail = xreq_legacy_vfail_cb,
 365         .legacy_context_get = xreq_legacy_context_get_cb,
 366         .legacy_context_set = xreq_legacy_context_set_cb,
 367         .addref = xreq_addref_cb,
 368         .unref = xreq_unref_cb,
 369         .session_close = xreq_session_close_cb,
 370         .session_set_LOA = xreq_session_set_LOA_cb,
 371         .legacy_subscribe_event_x1 = xreq_legacy_subscribe_event_x1_cb,
 372         .legacy_unsubscribe_event_x1 = xreq_legacy_unsubscribe_event_x1_cb,
 373         .legacy_subcall = xreq_legacy_subcall_cb,
 374         .legacy_subcallsync = xreq_legacy_subcallsync_cb,
 375         .vverbose = xreq_vverbose_cb,
 376         .legacy_store_req = xreq_legacy_store_cb,
 377         .legacy_subcall_req = xreq_legacy_subcall_req_cb,
 378         .has_permission = xreq_has_permission_cb,
 379         .get_application_id = xreq_get_application_id_cb,
 380         .context_make = xreq_context_make_cb,
 381         .subscribe_event_x2 = xreq_subscribe_event_x2_cb,
 382         .unsubscribe_event_x2 = xreq_unsubscribe_event_x2_cb,
 383         .legacy_subcall_request = xreq_legacy_subcall_request_cb,
 384         .get_uid = xreq_get_uid_cb,
 385         .reply = xreq_reply_cb,
 386         .vreply = xreq_vreply_cb,
 387         .get_client_info = xreq_get_client_info_cb,
 388         .subcall = xreq_subcall_cb,
 389         .subcallsync = xreq_subcallsync_cb,
 390 };
 391 /******************************************************************************/
 392 #if WITH_AFB_HOOK
 393
 394 static struct json_object *xreq_hooked_json_cb(struct afb_req_x2 *closure)
 395 {
 396         struct json_object *r = xreq_json_cb(closure);
 397         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 398         return afb_hook_xreq_json(xreq, r);
 399 }
 400
 401 static struct afb_arg xreq_hooked_get_cb(struct afb_req_x2 *closure, const char *name)
 402 {
 403         struct afb_arg r = xreq_get_cb(closure, name);
 404         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 405         return afb_hook_xreq_get(xreq, name, r);
 406 }
 407
 408 static void xreq_hooked_reply_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *error, const char *info)
 409 {
 410         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 411         afb_hook_xreq_reply(xreq, obj, error, info);
 412         xreq_reply_cb(closure, obj, error, info);
 413 }
 414
 415 static void xreq_hooked_vreply_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *error, const char *fmt, va_list args)
 416 {
 417         char *info;
 418         if (fmt == NULL || vasprintf(&info, fmt, args) < 0)
 419                 info = NULL;
 420         xreq_hooked_reply_cb(closure, obj, error, info);
 421         free(info);
 422 }
 423
 424 static void xreq_hooked_legacy_success_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *info)
 425 {
 426         xreq_hooked_reply_cb(closure, obj, NULL, info);
 427 }
 428
 429 static void xreq_hooked_legacy_fail_cb(struct afb_req_x2 *closure, const char *status, const char *info)
 430 {
 431         xreq_hooked_reply_cb(closure, NULL, status, info);
 432 }
 433
 434 static void xreq_hooked_legacy_vsuccess_cb(struct afb_req_x2 *closure, struct json_object *obj, const char *fmt, va_list args)
 435 {
 436         xreq_hooked_vreply_cb(closure, obj, NULL, fmt, args);
 437 }
 438
 439 static void xreq_hooked_legacy_vfail_cb(struct afb_req_x2 *closure, const char *status, const char *fmt, va_list args)
 440 {
 441         xreq_hooked_vreply_cb(closure, NULL, status, fmt, args);
 442 }
 443
 444 static void *xreq_hooked_legacy_context_get_cb(struct afb_req_x2 *closure)
 445 {
 446         void *r = xreq_legacy_context_get_cb(closure);
 447         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 448         return afb_hook_xreq_legacy_context_get(xreq, r);
 449 }
 450
 451 static void xreq_hooked_legacy_context_set_cb(struct afb_req_x2 *closure, void *value, void (*free_value)(void*))
 452 {
 453         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 454         afb_hook_xreq_legacy_context_set(xreq, value, free_value);
 455         xreq_legacy_context_set_cb(closure, value, free_value);
 456 }
 457
 458 static struct afb_req_x2 *xreq_hooked_addref_cb(struct afb_req_x2 *closure)
 459 {
 460         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 461         afb_hook_xreq_addref(xreq);
 462         return xreq_addref_cb(closure);
 463 }
 464
 465 static void xreq_hooked_unref_cb(struct afb_req_x2 *closure)
 466 {
 467         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 468         afb_hook_xreq_unref(xreq);
 469         xreq_unref_cb(closure);
 470 }
 471
 472 static void xreq_hooked_session_close_cb(struct afb_req_x2 *closure)
 473 {
 474         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 475         afb_hook_xreq_session_close(xreq);
 476         xreq_session_close_cb(closure);
 477 }
 478
 479 static int xreq_hooked_session_set_LOA_cb(struct afb_req_x2 *closure, unsigned level)
 480 {
 481         int r = xreq_session_set_LOA_cb(closure, level);
 482         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 483         return afb_hook_xreq_session_set_LOA(xreq, level, r);
 484 }
 485
 486 static int xreq_hooked_subscribe_event_x2_cb(struct afb_req_x2 *closure, struct afb_event_x2 *event)
 487 {
 488         int r = xreq_subscribe_event_x2_cb(closure, event);
 489         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 490         return afb_hook_xreq_subscribe(xreq, event, r);
 491 }
 492
 493 static int xreq_hooked_legacy_subscribe_event_x1_cb(struct afb_req_x2 *closure, struct afb_event_x1 event)
 494 {
 495         return xreq_hooked_subscribe_event_x2_cb(closure, afb_event_x1_to_event_x2(event));
 496 }
 497
 498 static int xreq_hooked_unsubscribe_event_x2_cb(struct afb_req_x2 *closure, struct afb_event_x2 *event)
 499 {
 500         int r = xreq_unsubscribe_event_x2_cb(closure, event);
 501         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 502         return afb_hook_xreq_unsubscribe(xreq, event, r);
 503 }
 504
 505 static int xreq_hooked_legacy_unsubscribe_event_x1_cb(struct afb_req_x2 *closure, struct afb_event_x1 event)
 506 {
 507         return xreq_hooked_unsubscribe_event_x2_cb(closure, afb_event_x1_to_event_x2(event));
 508 }
 509
 510 static void xreq_hooked_legacy_subcall_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *closure)
 511 {
 512         struct afb_xreq *xreq = xreq_from_req_x2(req);
 513         afb_calls_legacy_hooked_subcall_v1(xreq, api, verb, args, callback, closure);
 514 }
 515
 516 static void xreq_hooked_legacy_subcall_req_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req_x1), void *closure)
 517 {
 518         struct afb_xreq *xreq = xreq_from_req_x2(req);
 519         afb_calls_legacy_hooked_subcall_v2(xreq, api, verb, args, callback, closure);
 520 }
 521
 522 static void xreq_hooked_legacy_subcall_request_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req_x2 *), void *closure)
 523 {
 524         struct afb_xreq *xreq = xreq_from_req_x2(req);
 525         afb_calls_legacy_hooked_subcall_v3(xreq, api, verb, args, callback, closure);
 526 }
 527
 528 static int xreq_hooked_legacy_subcallsync_cb(struct afb_req_x2 *req, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 529 {
 530         struct afb_xreq *xreq = xreq_from_req_x2(req);
 531         return afb_calls_legacy_hooked_subcall_sync(xreq, api, verb, args, result);
 532 }
 533
 534 static void xreq_hooked_vverbose_cb(struct afb_req_x2 *closure, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
 535 {
 536         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 537         va_list ap;
 538         va_copy(ap, args);
 539         xreq_vverbose_cb(closure, level, file, line, func, fmt, args);
 540         afb_hook_xreq_vverbose(xreq, level, file, line, func, fmt, ap);
 541         va_end(ap);
 542 }
 543
 544 static struct afb_stored_req *xreq_hooked_legacy_store_cb(struct afb_req_x2 *closure)
 545 {
 546         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 547         struct afb_stored_req *r = xreq_legacy_store_cb(closure);
 548         afb_hook_xreq_legacy_store(xreq, r);
 549         return r;
 550 }
 551
 552 static int xreq_hooked_has_permission_cb(struct afb_req_x2 *closure, const char *permission)
 553 {
 554         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 555         int r = xreq_has_permission_cb(closure, permission);
 556         return afb_hook_xreq_has_permission(xreq, permission, r);
 557 }
 558
 559 static char *xreq_hooked_get_application_id_cb(struct afb_req_x2 *closure)
 560 {
 561         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 562         char *r = xreq_get_application_id_cb(closure);
 563         return afb_hook_xreq_get_application_id(xreq, r);
 564 }
 565
 566 static void *xreq_hooked_context_make_cb(struct afb_req_x2 *closure, int replace, void *(*create_value)(void*), void (*free_value)(void*), void *create_closure)
 567 {
 568         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 569         void *result = xreq_context_make_cb(closure, replace, create_value, free_value, create_closure);
 570         return afb_hook_xreq_context_make(xreq, replace, create_value, free_value, create_closure, result);
 571 }
 572
 573 static int xreq_hooked_get_uid_cb(struct afb_req_x2 *closure)
 574 {
 575         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 576         int r = xreq_get_uid_cb(closure);
 577         return afb_hook_xreq_get_uid(xreq, r);
 578 }
 579
 580 static struct json_object *xreq_hooked_get_client_info_cb(struct afb_req_x2 *closure)
 581 {
 582         struct afb_xreq *xreq = xreq_from_req_x2(closure);
 583         struct json_object *r = xreq_get_client_info_cb(closure);
 584         return afb_hook_xreq_get_client_info(xreq, r);
 585 }
 586
 587 static void xreq_hooked_subcall_cb(
 588                                 struct afb_req_x2 *req,
 589                                 const char *api,
 590                                 const char *verb,
 591                                 struct json_object *args,
 592                                 int flags,
 593                                 void (*callback)(void *closure, struct json_object *object, const char *error, const char * info, struct afb_req_x2 *req),
 594                                 void *closure)
 595 {
 596         struct afb_xreq *xreq = xreq_from_req_x2(req);
 597         afb_calls_hooked_subcall(xreq, api, verb, args, flags, callback, closure);
 598 }
 599
 600 static int xreq_hooked_subcallsync_cb(
 601                                 struct afb_req_x2 *req,
 602                                 const char *api,
 603                                 const char *verb,
 604                                 struct json_object *args,
 605                                 int flags,
 606                                 struct json_object **object,
 607                                 char **error,
 608                                 char **info)
 609 {
 610         struct afb_xreq *xreq = xreq_from_req_x2(req);
 611         return afb_calls_hooked_subcall_sync(xreq, api, verb, args, flags, object, error, info);
 612 }
 613
 614 /******************************************************************************/
 615
 616 const struct afb_req_x2_itf xreq_hooked_itf = {
 617         .json = xreq_hooked_json_cb,
 618         .get = xreq_hooked_get_cb,
 619         .legacy_success = xreq_hooked_legacy_success_cb,
 620         .legacy_fail = xreq_hooked_legacy_fail_cb,
 621         .legacy_vsuccess = xreq_hooked_legacy_vsuccess_cb,
 622         .legacy_vfail = xreq_hooked_legacy_vfail_cb,
 623         .legacy_context_get = xreq_hooked_legacy_context_get_cb,
 624         .legacy_context_set = xreq_hooked_legacy_context_set_cb,
 625         .addref = xreq_hooked_addref_cb,
 626         .unref = xreq_hooked_unref_cb,
 627         .session_close = xreq_hooked_session_close_cb,
 628         .session_set_LOA = xreq_hooked_session_set_LOA_cb,
 629         .legacy_subscribe_event_x1 = xreq_hooked_legacy_subscribe_event_x1_cb,
 630         .legacy_unsubscribe_event_x1 = xreq_hooked_legacy_unsubscribe_event_x1_cb,
 631         .legacy_subcall = xreq_hooked_legacy_subcall_cb,
 632         .legacy_subcallsync = xreq_hooked_legacy_subcallsync_cb,
 633         .vverbose = xreq_hooked_vverbose_cb,
 634         .legacy_store_req = xreq_hooked_legacy_store_cb,
 635         .legacy_subcall_req = xreq_hooked_legacy_subcall_req_cb,
 636         .has_permission = xreq_hooked_has_permission_cb,
 637         .get_application_id = xreq_hooked_get_application_id_cb,
 638         .context_make = xreq_hooked_context_make_cb,
 639         .subscribe_event_x2 = xreq_hooked_subscribe_event_x2_cb,
 640         .unsubscribe_event_x2 = xreq_hooked_unsubscribe_event_x2_cb,
 641         .legacy_subcall_request = xreq_hooked_legacy_subcall_request_cb,
 642         .get_uid = xreq_hooked_get_uid_cb,
 643         .reply = xreq_hooked_reply_cb,
 644         .vreply = xreq_hooked_vreply_cb,
 645         .get_client_info = xreq_hooked_get_client_info_cb,
 646         .subcall = xreq_hooked_subcall_cb,
 647         .subcallsync = xreq_hooked_subcallsync_cb,
 648 };
 649 #endif
 650
 651 /******************************************************************************/
 652
 653 struct afb_req_x1 afb_xreq_unstore(struct afb_stored_req *sreq)
 654 {
 655         struct afb_xreq *xreq = (struct afb_xreq *)sreq;
 656 #if WITH_AFB_HOOK
 657         if (xreq->hookflags)
 658                 afb_hook_xreq_legacy_unstore(xreq);
 659 #endif
 660         return xreq_to_req_x1(xreq);
 661 }
 662
 663 struct json_object *afb_xreq_json(struct afb_xreq *xreq)
 664 {
 665         return afb_req_x2_json(xreq_to_req_x2(xreq));
 666 }
 667
 668 void afb_xreq_reply(struct afb_xreq *xreq, struct json_object *obj, const char *error, const char *info)
 669 {
 670         afb_req_x2_reply(xreq_to_req_x2(xreq), obj, error, info);
 671 }
 672
 673 void afb_xreq_reply_f(struct afb_xreq *xreq, struct json_object *obj, const char *error, const char *info, ...)
 674 {
 675         va_list args;
 676
 677         va_start(args, info);
 678         afb_req_x2_reply_v(xreq_to_req_x2(xreq), obj, error, info, args);
 679         va_end(args);
 680 }
 681
 682 const char *afb_xreq_raw(struct afb_xreq *xreq, size_t *size)
 683 {
 684         struct json_object *obj = xreq_json_cb(xreq_to_req_x2(xreq));
 685         const char *result = json_object_to_json_string_ext(obj, JSON_C_TO_STRING_NOSLASHESCAPE);
 686         if (size != NULL)
 687                 *size = strlen(result);
 688         return result;
 689 }
 690
 691 void afb_xreq_unhooked_legacy_subcall(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req_x2 *), void *cb_closure)
 692 {
 693         xreq_legacy_subcall_request_cb(xreq_to_req_x2(xreq), api, verb, args, callback, cb_closure);
 694 }
 695
 696 void afb_xreq_unhooked_subcall(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, int flags, void (*callback)(void*, struct json_object*, const char*, const char*, struct afb_req_x2 *), void *closure)
 697 {
 698         xreq_subcall_cb(xreq_to_req_x2(xreq), api, verb, args, flags, callback, closure);
 699 }
 700
 701 int afb_xreq_unhooked_legacy_subcall_sync(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 702 {
 703         return xreq_legacy_subcallsync_cb(xreq_to_req_x2(xreq), api, verb, args, result);
 704 }
 705
 706 void afb_xreq_addref(struct afb_xreq *xreq)
 707 {
 708         afb_req_x2_addref(xreq_to_req_x2(xreq));
 709 }
 710
 711 void afb_xreq_unref(struct afb_xreq *xreq)
 712 {
 713         afb_req_x2_unref(xreq_to_req_x2(xreq));
 714 }
 715
 716 void afb_xreq_legacy_subcall(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*, struct afb_req_x2 *), void *cb_closure)
 717 {
 718         afb_req_x2_subcall_legacy(xreq_to_req_x2(xreq), api, verb, args, callback, cb_closure);
 719 }
 720
 721 void afb_xreq_subcall(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, int flags, void (*callback)(void*, struct json_object*, const char*, const char*, struct afb_req_x2 *), void *closure)
 722 {
 723         afb_req_x2_subcall(xreq_to_req_x2(xreq), api, verb, args, flags, callback, closure);
 724 }
 725
 726 int afb_xreq_legacy_subcall_sync(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, struct json_object **result)
 727 {
 728         return afb_req_x2_subcall_sync_legacy(xreq_to_req_x2(xreq), api, verb, args, result);
 729 }
 730
 731 #if WITH_LEGACY_BINDING_V1
 732 static int xreq_session_check_apply_v1(struct afb_xreq *xreq, int sessionflags)
 733 {
 734         int loa;
 735
 736         if ((sessionflags & (AFB_SESSION_CLOSE_X1|AFB_SESSION_RENEW_X1|AFB_SESSION_CHECK_X1|AFB_SESSION_LOA_EQ_X1)) != 0) {
 737                 if (!afb_context_check(&xreq->context)) {
 738                         afb_context_close(&xreq->context);
 739                         afb_xreq_reply_f(xreq, NULL, "denied", "invalid token's identity");
 740                         errno = EINVAL;
 741                         return -1;
 742                 }
 743         }
 744
 745         if ((sessionflags & AFB_SESSION_LOA_GE_X1) != 0) {
 746                 loa = (sessionflags >> AFB_SESSION_LOA_SHIFT_X1) & AFB_SESSION_LOA_MASK_X1;
 747                 if (!afb_context_check_loa(&xreq->context, loa)) {
 748                         afb_xreq_reply_f(xreq, NULL, "denied", "invalid LOA");
 749                         errno = EPERM;
 750                         return -1;
 751                 }
 752         }
 753
 754         if ((sessionflags & AFB_SESSION_LOA_LE_X1) != 0) {
 755                 loa = (sessionflags >> AFB_SESSION_LOA_SHIFT_X1) & AFB_SESSION_LOA_MASK_X1;
 756                 if (afb_context_check_loa(&xreq->context, loa + 1)) {
 757                         afb_xreq_reply_f(xreq, NULL, "denied", "invalid LOA");
 758                         errno = EPERM;
 759                         return -1;
 760                 }
 761         }
 762
 763         if ((sessionflags & AFB_SESSION_CLOSE_X1) != 0) {
 764                 afb_context_change_loa(&xreq->context, 0);
 765                 afb_context_close(&xreq->context);
 766         }
 767
 768         return 0;
 769 }
 770 #endif
 771
 772 static int xreq_session_check_apply_v2(struct afb_xreq *xreq, uint32_t sessionflags, const struct afb_auth *auth)
 773 {
 774         int loa;
 775
 776         if (sessionflags != 0) {
 777                 if (!afb_context_check(&xreq->context)) {
 778                         afb_context_close(&xreq->context);
 779                         afb_xreq_reply_f(xreq, NULL, "denied", "invalid token's identity");
 780                         errno = EINVAL;
 781                         return -1;
 782                 }
 783         }
 784
 785         loa = (int)(sessionflags & AFB_SESSION_LOA_MASK_X2);
 786         if (loa && !afb_context_check_loa(&xreq->context, loa)) {
 787                 afb_xreq_reply_f(xreq, NULL, "denied", "invalid LOA");
 788                 errno = EPERM;
 789                 return -1;
 790         }
 791
 792         if (auth && !afb_auth_check(xreq, auth)) {
 793                 afb_xreq_reply_f(xreq, NULL, "denied", "authorisation refused");
 794                 errno = EPERM;
 795                 return -1;
 796         }
 797
 798         if ((sessionflags & AFB_SESSION_CLOSE_X2) != 0) {
 799                 afb_context_close(&xreq->context);
 800         }
 801
 802         return 0;
 803 }
 804
 805 #if WITH_LEGACY_BINDING_V1
 806 void afb_xreq_call_verb_v1(struct afb_xreq *xreq, const struct afb_verb_desc_v1 *verb)
 807 {
 808         if (!verb)
 809                 afb_xreq_reply_unknown_verb(xreq);
 810         else
 811                 if (!xreq_session_check_apply_v1(xreq, verb->session))
 812                         verb->callback(xreq_to_req_x1(xreq));
 813 }
 814 #endif
 815
 816 #if WITH_LEGACY_BINDING_V2
 817 void afb_xreq_call_verb_v2(struct afb_xreq *xreq, const struct afb_verb_v2 *verb)
 818 {
 819         if (!verb)
 820                 afb_xreq_reply_unknown_verb(xreq);
 821         else
 822                 if (!xreq_session_check_apply_v2(xreq, verb->session, verb->auth))
 823                         verb->callback(xreq_to_req_x1(xreq));
 824 }
 825 #endif
 826
 827 void afb_xreq_call_verb_v3(struct afb_xreq *xreq, const struct afb_verb_v3 *verb)
 828 {
 829         if (!verb)
 830                 afb_xreq_reply_unknown_verb(xreq);
 831         else
 832                 if (xreq_session_check_apply_v2(xreq, verb->session, verb->auth) >= 0)
 833                         verb->callback(xreq_to_req_x2(xreq));
 834 }
 835
 836 void afb_xreq_init(struct afb_xreq *xreq, const struct afb_xreq_query_itf *queryitf)
 837 {
 838         memset(xreq, 0, sizeof *xreq);
 839         xreq->request.itf = &xreq_itf; /* no hook by default */
 840         xreq->refcount = 1;
 841         xreq->queryitf = queryitf;
 842 }
 843
 844 void afb_xreq_reply_unknown_api(struct afb_xreq *xreq)
 845 {
 846         afb_xreq_reply_f(xreq, NULL, "unknown-api", "api %s not found (for verb %s)", xreq->request.called_api, xreq->request.called_verb);
 847 }
 848
 849 void afb_xreq_reply_unknown_verb(struct afb_xreq *xreq)
 850 {
 851         afb_xreq_reply_f(xreq, NULL, "unknown-verb", "verb %s unknown within api %s", xreq->request.called_verb, xreq->request.called_api);
 852 }
 853
 854 #if WITH_AFB_HOOK
 855 static void init_hooking(struct afb_xreq *xreq)
 856 {
 857         afb_hook_init_xreq(xreq);
 858         if (xreq->hookflags) {
 859                 xreq->request.itf = &xreq_hooked_itf; /* unhook the interface */
 860                 afb_hook_xreq_begin(xreq);
 861         }
 862 }
 863 #endif
 864
 865 /**
 866  * job callback for asynchronous and secured processing of the request.
 867  */
 868 static void process_async(int signum, void *arg)
 869 {
 870         struct afb_xreq *xreq = arg;
 871         const struct afb_api_item *api;
 872
 873         if (signum != 0) {
 874                 /* emit the error (assumes that hooking is initialised) */
 875                 afb_xreq_reply_f(xreq, NULL, "aborted", "signal %s(%d) caught", strsignal(signum), signum);
 876         } else {
 877 #if WITH_AFB_HOOK
 878                 /* init hooking */
 879                 init_hooking(xreq);
 880 #endif
 881                 /* invoke api call method to process the request */
 882                 api = (const struct afb_api_item*)xreq->context.api_key;
 883                 api->itf->call(api->closure, xreq);
 884         }
 885         /* release the request */
 886         afb_xreq_unhooked_unref(xreq);
 887 }
 888
 889 /**
 890  * Early request failure of the request 'xreq' with, as usual, 'status' and 'info'
 891  * The early failure occurs only in function 'afb_xreq_process' where normally,
 892  * the hooking is not initialised. So this "early" failure takes care to initialise
 893  * the hooking in first.
 894  */
 895 static void early_failure(struct afb_xreq *xreq, const char *status, const char *info, ...)
 896 {
 897         va_list args;
 898
 899 #if WITH_AFB_HOOK
 900         /* init hooking */
 901         init_hooking(xreq);
 902 #endif
 903
 904         /* send error */
 905         va_start(args, info);
 906         afb_req_x2_reply_v(xreq_to_req_x2(xreq), NULL, status, info, args);
 907         va_end(args);
 908 }
 909
 910 /**
 911  * Enqueue a job for processing the request 'xreq' using the given 'apiset'.
 912  * Errors are reported as request failures.
 913  */
 914 void afb_xreq_process(struct afb_xreq *xreq, struct afb_apiset *apiset)
 915 {
 916         const struct afb_api_item *api;
 917         struct afb_xreq *caller;
 918
 919         /* lookup at the api */
 920         xreq->apiset = apiset;
 921         api = afb_apiset_lookup_started(apiset, xreq->request.called_api, 1);
 922         if (!api) {
 923                 if (errno == ENOENT)
 924                         early_failure(xreq, "unknown-api", "api %s not found (for verb %s)", xreq->request.called_api, xreq->request.called_verb);
 925                 else
 926                         early_failure(xreq, "bad-api-state", "api %s not started correctly: %m", xreq->request.called_api);
 927                 goto end;
 928         }
 929         xreq->context.api_key = api;
 930
 931         /* check self locking */
 932         if (api->group) {
 933                 caller = xreq->caller;
 934                 while (caller) {
 935                         if (((const struct afb_api_item*)caller->context.api_key)->group == api->group) {
 936                                 /* noconcurrency lock detected */
 937                                 ERROR("self-lock detected in call stack for API %s", xreq->request.called_api);
 938                                 early_failure(xreq, "self-locked", "recursive self lock, API %s", xreq->request.called_api);
 939                                 goto end;
 940                         }
 941                         caller = caller->caller;
 942                 }
 943         }
 944
 945         /* queue the request job */
 946         afb_xreq_unhooked_addref(xreq);
 947         if (jobs_queue(api->group, afb_apiset_timeout_get(apiset), process_async, xreq) < 0) {
 948                 /* TODO: allows or not to proccess it directly as when no threading? (see above) */
 949                 ERROR("can't process job with threads: %m");
 950                 early_failure(xreq, "cancelled", "not able to create a job for the task");
 951                 afb_xreq_unhooked_unref(xreq);
 952         }
 953 end:
 954         afb_xreq_unhooked_unref(xreq);
 955 }
 956
 957 const char *xreq_on_behalf_cred_export(struct afb_xreq *xreq)
 958 {
 959         return xreq->caller ? afb_cred_export(xreq->cred) : NULL;
 960 }
 961