service/service.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <libubox/blobmsg_json.h>
  16 #include <libubox/avl-cmp.h>
  17
  18 #include "../procd.h"
  19
  20 #include "service.h"
  21 #include "instance.h"
  22
  23 #include "../rcS.h"
  24
  25 AVL_TREE(services, avl_strcmp, false, NULL);
  26 static struct blob_buf b;
  27 static struct ubus_context *ctx;
  28
  29 static void
  30 service_instance_add(struct service *s, struct blob_attr *attr)
  31 {
  32         struct service_instance *in;
  33
  34         if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
  35                 return;
  36
  37         in = calloc(1, sizeof(*in));
  38         if (!in)
  39                 return;
  40
  41         instance_init(in, s, attr);
  42         vlist_add(&s->instances, &in->node, (void *) in->name);
  43 }
  44
  45 static void
  46 service_instance_update(struct vlist_tree *tree, struct vlist_node *node_new,
  47                         struct vlist_node *node_old)
  48 {
  49         struct service_instance *in_o = NULL, *in_n = NULL;
  50
  51         if (node_old)
  52                 in_o = container_of(node_old, struct service_instance, node);
  53
  54         if (node_new)
  55                 in_n = container_of(node_new, struct service_instance, node);
  56
  57         if (in_o && in_n) {
  58                 DEBUG(2, "Update instance %s::%s\n", in_o->srv->name, in_o->name);
  59                 instance_update(in_o, in_n);
  60                 instance_free(in_n);
  61         } else if (in_o) {
  62                 DEBUG(2, "Stop instance %s::%s\n", in_o->srv->name, in_o->name);
  63                 instance_stop(in_o);
  64         } else if (in_n) {
  65                 DEBUG(2, "Start instance %s::%s\n", in_n->srv->name, in_n->name);
  66                 instance_start(in_n);
  67         }
  68         blob_buf_init(&b, 0);
  69         trigger_event("instance.update", b.head);
  70 }
  71
  72 static struct service *
  73 service_alloc(const char *name)
  74 {
  75         struct service *s;
  76         char *new_name;
  77
  78         s = calloc_a(sizeof(*s), &new_name, strlen(name) + 1);
  79         strcpy(new_name, name);
  80
  81         vlist_init(&s->instances, avl_strcmp, service_instance_update);
  82         s->instances.no_delete = true;
  83         s->name = new_name;
  84         s->avl.key = s->name;
  85         INIT_LIST_HEAD(&s->validators);
  86
  87         return s;
  88 }
  89
  90 enum {
  91         SERVICE_SET_NAME,
  92         SERVICE_SET_SCRIPT,
  93         SERVICE_SET_INSTANCES,
  94         SERVICE_SET_TRIGGER,
  95         SERVICE_SET_VALIDATE,
  96         __SERVICE_SET_MAX
  97 };
  98
  99 static const struct blobmsg_policy service_set_attrs[__SERVICE_SET_MAX] = {
 100         [SERVICE_SET_NAME] = { "name", BLOBMSG_TYPE_STRING },
 101         [SERVICE_SET_SCRIPT] = { "script", BLOBMSG_TYPE_STRING },
 102         [SERVICE_SET_INSTANCES] = { "instances", BLOBMSG_TYPE_TABLE },
 103         [SERVICE_SET_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
 104         [SERVICE_SET_VALIDATE] = { "validate", BLOBMSG_TYPE_ARRAY },
 105 };
 106
 107 static int
 108 service_update(struct service *s, struct blob_attr **tb, bool add)
 109 {
 110         struct blob_attr *cur;
 111         int rem;
 112
 113         if (s->trigger) {
 114                 trigger_del(s);
 115                 free(s->trigger);
 116                 s->trigger = NULL;
 117         }
 118
 119         service_validate_del(s);
 120
 121         if (tb[SERVICE_SET_TRIGGER] && blobmsg_data_len(tb[SERVICE_SET_TRIGGER])) {
 122                 s->trigger = blob_memdup(tb[SERVICE_SET_TRIGGER]);
 123                 if (!s->trigger)
 124                         return -1;
 125                 trigger_add(s->trigger, s);
 126         }
 127
 128         if (tb[SERVICE_SET_VALIDATE] && blobmsg_data_len(tb[SERVICE_SET_VALIDATE])) {
 129                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_VALIDATE], rem)
 130                         service_validate_add(s, cur);
 131         }
 132
 133         if (tb[SERVICE_SET_INSTANCES]) {
 134                 if (!add)
 135                         vlist_update(&s->instances);
 136                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_INSTANCES], rem) {
 137                         service_instance_add(s, cur);
 138                 }
 139                 if (!add)
 140                         vlist_flush(&s->instances);
 141         }
 142
 143         s->deleted = false;
 144
 145         rc(s->name, "running");
 146
 147         return 0;
 148 }
 149
 150 static void
 151 service_delete(struct service *s)
 152 {
 153         vlist_flush_all(&s->instances);
 154         s->deleted = true;
 155         service_stopped(s);
 156 }
 157
 158 enum {
 159         SERVICE_ATTR_NAME,
 160         __SERVICE_ATTR_MAX,
 161 };
 162
 163 static const struct blobmsg_policy service_attrs[__SERVICE_ATTR_MAX] = {
 164         [SERVICE_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 165 };
 166
 167 enum {
 168         SERVICE_DEL_ATTR_NAME,
 169         SERVICE_DEL_ATTR_INSTANCE,
 170         __SERVICE_DEL_ATTR_MAX,
 171 };
 172
 173 static const struct blobmsg_policy service_del_attrs[__SERVICE_DEL_ATTR_MAX] = {
 174         [SERVICE_DEL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 175         [SERVICE_DEL_ATTR_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 176 };
 177
 178 enum {
 179         SERVICE_LIST_ATTR_NAME,
 180         SERVICE_LIST_ATTR_VERBOSE,
 181         __SERVICE_LIST_ATTR_MAX,
 182 };
 183
 184 static const struct blobmsg_policy service_list_attrs[__SERVICE_LIST_ATTR_MAX] = {
 185         [SERVICE_LIST_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 186         [SERVICE_LIST_ATTR_VERBOSE] = { "verbose", BLOBMSG_TYPE_BOOL },
 187 };
 188
 189 enum {
 190         SERVICE_SIGNAL_ATTR_NAME,
 191         SERVICE_SIGNAL_ATTR_INSTANCE,
 192         SERVICE_SIGNAL_ATTR_SIGNAL,
 193         __SERVICE_SIGNAL_ATTR_MAX,
 194 };
 195
 196 static const struct blobmsg_policy service_signal_attrs[__SERVICE_SIGNAL_ATTR_MAX] = {
 197         [SERVICE_SIGNAL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 198         [SERVICE_SIGNAL_ATTR_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 199         [SERVICE_SIGNAL_ATTR_SIGNAL] = { "signal", BLOBMSG_TYPE_INT32 },
 200 };
 201
 202 enum {
 203         EVENT_TYPE,
 204         EVENT_DATA,
 205         __EVENT_MAX
 206 };
 207
 208 static const struct blobmsg_policy event_policy[__EVENT_MAX] = {
 209         [EVENT_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 210         [EVENT_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 211 };
 212
 213 enum {
 214         VALIDATE_PACKAGE,
 215         VALIDATE_TYPE,
 216         VALIDATE_SERVICE,
 217         __VALIDATE_MAX
 218 };
 219
 220 static const struct blobmsg_policy validate_policy[__VALIDATE_MAX] = {
 221         [VALIDATE_PACKAGE] = { .name = "package", .type = BLOBMSG_TYPE_STRING },
 222         [VALIDATE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 223         [VALIDATE_SERVICE] = { .name = "service", .type = BLOBMSG_TYPE_STRING },
 224 };
 225
 226 enum {
 227         DATA_NAME,
 228         DATA_INSTANCE,
 229         DATA_TYPE,
 230         __DATA_MAX
 231 };
 232
 233 static const struct blobmsg_policy get_data_policy[] = {
 234         [DATA_NAME] = { "name", BLOBMSG_TYPE_STRING },
 235         [DATA_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 236         [DATA_TYPE] = { "type", BLOBMSG_TYPE_STRING },
 237 };
 238
 239 static int
 240 service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
 241                    struct ubus_request_data *req, const char *method,
 242                    struct blob_attr *msg)
 243 {
 244         struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
 245         struct service *s = NULL;
 246         const char *name;
 247         bool add = !strcmp(method, "add");
 248         int ret;
 249
 250         blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
 251         cur = tb[SERVICE_ATTR_NAME];
 252         if (!cur)
 253                 return UBUS_STATUS_INVALID_ARGUMENT;
 254
 255         name = blobmsg_data(cur);
 256
 257         s = avl_find_element(&services, name, s, avl);
 258         if (s) {
 259                 DEBUG(2, "Update service %s\n", name);
 260                 return service_update(s, tb, add);
 261         }
 262
 263         DEBUG(2, "Create service %s\n", name);
 264         s = service_alloc(name);
 265         if (!s)
 266                 return UBUS_STATUS_UNKNOWN_ERROR;
 267
 268         ret = service_update(s, tb, add);
 269         if (ret)
 270                 return ret;
 271
 272         avl_insert(&services, &s->avl);
 273
 274         service_event("service.start", s->name, NULL);
 275
 276         return 0;
 277 }
 278
 279 static void
 280 service_dump(struct service *s, bool verbose)
 281 {
 282         struct service_instance *in;
 283         void *c, *i;
 284
 285         c = blobmsg_open_table(&b, s->name);
 286
 287         if (!avl_is_empty(&s->instances.avl)) {
 288                 i = blobmsg_open_table(&b, "instances");
 289                 vlist_for_each_element(&s->instances, in, node)
 290                         instance_dump(&b, in, verbose);
 291                 blobmsg_close_table(&b, i);
 292         }
 293         if (verbose && s->trigger)
 294                 blobmsg_add_blob(&b, s->trigger);
 295         if (verbose && !list_empty(&s->validators))
 296                 service_validate_dump(&b, s);
 297         blobmsg_close_table(&b, c);
 298 }
 299
 300 static int
 301 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 302                     struct ubus_request_data *req, const char *method,
 303                     struct blob_attr *msg)
 304 {
 305         struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
 306         struct service *s;
 307         const char *name = NULL;
 308         bool verbose = false;
 309
 310         blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 311
 312         if (tb[SERVICE_LIST_ATTR_VERBOSE])
 313                 verbose = blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]);
 314         if (tb[SERVICE_LIST_ATTR_NAME])
 315                 name = blobmsg_get_string(tb[SERVICE_LIST_ATTR_NAME]);
 316
 317         blob_buf_init(&b, 0);
 318         avl_for_each_element(&services, s, avl) {
 319                 if (name && strcmp(s->name, name) != 0)
 320                         continue;
 321
 322                 service_dump(s, verbose);
 323         }
 324
 325         ubus_send_reply(ctx, req, b.head);
 326
 327         return 0;
 328 }
 329
 330 static int
 331 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 332                     struct ubus_request_data *req, const char *method,
 333                     struct blob_attr *msg)
 334 {
 335         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 336         struct service *s;
 337         struct service_instance *in;
 338
 339         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 340
 341         cur = tb[SERVICE_DEL_ATTR_NAME];
 342         if (!cur)
 343                 return UBUS_STATUS_NOT_FOUND;
 344
 345         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 346         if (!s)
 347                 return UBUS_STATUS_NOT_FOUND;
 348
 349         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 350         if (!cur) {
 351                 service_delete(s);
 352                 return 0;
 353         }
 354
 355         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 356         if (!in) {
 357                 ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
 358                 return UBUS_STATUS_NOT_FOUND;
 359         }
 360
 361         vlist_delete(&s->instances, &in->node);
 362
 363         return 0;
 364 }
 365
 366 static int
 367 service_handle_kill(struct service_instance *in, int sig)
 368 {
 369         if (kill(in->proc.pid, sig) == 0)
 370                 return 0;
 371
 372         switch (errno) {
 373         case EINVAL: return UBUS_STATUS_INVALID_ARGUMENT;
 374         case EPERM:  return UBUS_STATUS_PERMISSION_DENIED;
 375         case ESRCH:  return UBUS_STATUS_NOT_FOUND;
 376         }
 377
 378         return UBUS_STATUS_UNKNOWN_ERROR;
 379 }
 380
 381 static int
 382 service_handle_signal(struct ubus_context *ctx, struct ubus_object *obj,
 383                     struct ubus_request_data *req, const char *method,
 384                     struct blob_attr *msg)
 385 {
 386         struct blob_attr *tb[__SERVICE_SIGNAL_ATTR_MAX], *cur;
 387         struct service *s;
 388         struct service_instance *in;
 389         int sig = SIGHUP;
 390         int rv = 0;
 391
 392         blobmsg_parse(service_signal_attrs, __SERVICE_SIGNAL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 393
 394         cur = tb[SERVICE_SIGNAL_ATTR_SIGNAL];
 395         if (cur)
 396                 sig = blobmsg_get_u32(cur);
 397
 398         cur = tb[SERVICE_SIGNAL_ATTR_NAME];
 399         if (!cur)
 400                 return UBUS_STATUS_NOT_FOUND;
 401
 402         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 403         if (!s)
 404                 return UBUS_STATUS_NOT_FOUND;
 405
 406         cur = tb[SERVICE_SIGNAL_ATTR_INSTANCE];
 407         if (!cur) {
 408                 vlist_for_each_element(&s->instances, in, node)
 409                         rv = service_handle_kill(in, sig);
 410
 411                 return rv;
 412         }
 413
 414         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 415         if (!in) {
 416                 ERROR("instance %s not found\n", blobmsg_get_string(cur));
 417                 return UBUS_STATUS_NOT_FOUND;
 418         }
 419
 420         return service_handle_kill(in, sig);
 421 }
 422
 423 static int
 424 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 425                       struct ubus_request_data *req, const char *method,
 426                       struct blob_attr *msg)
 427 {
 428         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 429         struct service *s;
 430
 431         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 432
 433         cur = tb[SERVICE_SET_NAME];
 434         if (!cur)
 435                 return UBUS_STATUS_INVALID_ARGUMENT;
 436
 437         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 438         if (!s)
 439                 return UBUS_STATUS_NOT_FOUND;
 440
 441         if (!strcmp(method, "update_start"))
 442                 vlist_update(&s->instances);
 443         else
 444                 vlist_flush(&s->instances);
 445
 446         return 0;
 447 }
 448
 449 static int
 450 service_handle_event(struct ubus_context *ctx, struct ubus_object *obj,
 451                         struct ubus_request_data *req, const char *method,
 452                         struct blob_attr *msg)
 453 {
 454         struct blob_attr *tb[__EVENT_MAX];
 455
 456         if (!msg)
 457                 return UBUS_STATUS_INVALID_ARGUMENT;
 458
 459         blobmsg_parse(event_policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
 460         if (!tb[EVENT_TYPE] || !tb[EVENT_DATA])
 461                 return UBUS_STATUS_INVALID_ARGUMENT;
 462
 463         trigger_event(blobmsg_get_string(tb[EVENT_TYPE]), tb[EVENT_DATA]);
 464
 465         return 0;
 466 }
 467
 468 static int
 469 service_handle_validate(struct ubus_context *ctx, struct ubus_object *obj,
 470                         struct ubus_request_data *req, const char *method,
 471                         struct blob_attr *msg)
 472 {
 473         struct blob_attr *tb[__VALIDATE_MAX];
 474         char *p = NULL, *t = NULL;
 475
 476         if (!msg)
 477                 return UBUS_STATUS_INVALID_ARGUMENT;
 478
 479         blobmsg_parse(validate_policy, __VALIDATE_MAX, tb, blob_data(msg), blob_len(msg));
 480         if (tb[VALIDATE_SERVICE]) {
 481                 return 0;
 482         }
 483         if (tb[VALIDATE_PACKAGE])
 484                 p = blobmsg_get_string(tb[VALIDATE_PACKAGE]);
 485
 486         if (tb[VALIDATE_TYPE])
 487                 t = blobmsg_get_string(tb[VALIDATE_TYPE]);
 488
 489         blob_buf_init(&b, 0);
 490         service_validate_dump_all(&b, p, t);
 491         ubus_send_reply(ctx, req, b.head);
 492
 493         return 0;
 494 }
 495
 496 static int
 497 service_get_data(struct ubus_context *ctx, struct ubus_object *obj,
 498                  struct ubus_request_data *req, const char *method,
 499                  struct blob_attr *msg)
 500 {
 501         struct service_instance *in;
 502         struct service *s;
 503         struct blob_attr *tb[__DATA_MAX];
 504         const char *name = NULL;
 505         const char *instance = NULL;
 506         const char *type = NULL;
 507
 508         blobmsg_parse(get_data_policy, __DATA_MAX, tb, blob_data(msg), blob_len(msg));
 509         if (tb[DATA_NAME])
 510                 name = blobmsg_data(tb[DATA_NAME]);
 511         if (tb[DATA_INSTANCE])
 512                 instance = blobmsg_data(tb[DATA_INSTANCE]);
 513         if (tb[DATA_TYPE])
 514                 type = blobmsg_data(tb[DATA_TYPE]);
 515
 516         blob_buf_init(&b, 0);
 517         avl_for_each_element(&services, s, avl) {
 518                 void *cs = NULL;
 519
 520                 if (name && strcmp(name, s->name))
 521                         continue;
 522
 523                 vlist_for_each_element(&s->instances, in, node) {
 524                         struct blobmsg_list_node *var;
 525                         void *ci = NULL;
 526
 527                         if (instance && strcmp(instance, in->name))
 528                                 continue;
 529
 530                         blobmsg_list_for_each(&in->data, var) {
 531                                 if (type &&
 532                                     strcmp(blobmsg_name(var->data), type))
 533                                         continue;
 534
 535                                 if (!cs)
 536                                         cs = blobmsg_open_table(&b, s->name);
 537                                 if (!ci)
 538                                         ci = blobmsg_open_table(&b, in->name);
 539
 540                                 blobmsg_add_blob(&b, var->data);
 541                         }
 542
 543                         if (ci)
 544                                 blobmsg_close_table(&b, ci);
 545                 }
 546
 547                 if (cs)
 548                         blobmsg_close_table(&b, cs);
 549         }
 550
 551         ubus_send_reply(ctx, req, b.head);
 552         return 0;
 553 }
 554
 555 static struct ubus_method main_object_methods[] = {
 556         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 557         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 558         UBUS_METHOD("list", service_handle_list, service_list_attrs),
 559         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 560         UBUS_METHOD("signal", service_handle_signal, service_signal_attrs),
 561         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 562         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 563         UBUS_METHOD("event", service_handle_event, event_policy),
 564         UBUS_METHOD("validate", service_handle_validate, validate_policy),
 565         UBUS_METHOD("get_data", service_get_data, get_data_policy),
 566 };
 567
 568 static struct ubus_object_type main_object_type =
 569         UBUS_OBJECT_TYPE("service", main_object_methods);
 570
 571 static struct ubus_object main_object = {
 572         .name = "service",
 573         .type = &main_object_type,
 574         .methods = main_object_methods,
 575         .n_methods = ARRAY_SIZE(main_object_methods),
 576 };
 577
 578 int
 579 service_start_early(char *name, char *cmdline)
 580 {
 581         void *instances, *instance, *command, *respawn;
 582         char *t;
 583
 584         blob_buf_init(&b, 0);
 585         blobmsg_add_string(&b, "name", name);
 586         instances = blobmsg_open_table(&b, "instances");
 587         instance = blobmsg_open_table(&b, "instance1");
 588         command = blobmsg_open_array(&b, "command");
 589         t = strtok(cmdline, " ");
 590         while (t) {
 591                 blobmsg_add_string(&b, NULL, t);
 592                 t = strtok(NULL, " ");
 593         }
 594         blobmsg_close_array(&b, command);
 595         respawn = blobmsg_open_array(&b, "respawn");
 596         blobmsg_add_string(&b, NULL, "3600");
 597         blobmsg_add_string(&b, NULL, "1");
 598         blobmsg_add_string(&b, NULL, "0");
 599         blobmsg_close_array(&b, respawn);
 600         blobmsg_close_table(&b, instance);
 601         blobmsg_close_table(&b, instances);
 602
 603         return service_handle_set(NULL, NULL, NULL, "add", b.head);
 604 }
 605
 606 void service_stopped(struct service *s)
 607 {
 608         if (s->deleted && avl_is_empty(&s->instances.avl)) {
 609                 service_event("service.stop", s->name, NULL);
 610                 avl_delete(&services, &s->avl);
 611                 trigger_del(s);
 612                 service_validate_del(s);
 613                 free(s->trigger);
 614                 free(s);
 615         }
 616 }
 617
 618 void service_event(const char *type, const char *service, const char *instance)
 619 {
 620         if (!ctx)
 621                 return;
 622
 623         blob_buf_init(&b, 0);
 624         blobmsg_add_string(&b, "service", service);
 625         if (instance)
 626                 blobmsg_add_string(&b, "instance", instance);
 627         ubus_notify(ctx, &main_object, type, b.head, -1);
 628 }
 629
 630 void ubus_init_service(struct ubus_context *_ctx)
 631 {
 632         ctx = _ctx;
 633         ubus_add_object(ctx, &main_object);
 634 }