ubus.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   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 #define _GNU_SOURCE
  15
  16 #include <arpa/inet.h>
  17 #include <string.h>
  18 #include <stdio.h>
  19
  20 #include "netifd.h"
  21 #include "interface.h"
  22 #include "proto.h"
  23 #include "ubus.h"
  24 #include "system.h"
  25
  26 static struct ubus_context *ctx = NULL;
  27 static struct blob_buf b;
  28 static const char *ubus_path;
  29
  30 /* global object */
  31
  32 static int
  33 netifd_handle_restart(struct ubus_context *ctx, struct ubus_object *obj,
  34                       struct ubus_request_data *req, const char *method,
  35                       struct blob_attr *msg)
  36 {
  37         netifd_restart();
  38         return 0;
  39 }
  40
  41 static int
  42 netifd_handle_reload(struct ubus_context *ctx, struct ubus_object *obj,
  43                      struct ubus_request_data *req, const char *method,
  44                      struct blob_attr *msg)
  45 {
  46         netifd_reload();
  47         return 0;
  48 }
  49
  50 enum {
  51         HR_TARGET,
  52         HR_V6,
  53         __HR_MAX
  54 };
  55
  56 static const struct blobmsg_policy route_policy[__HR_MAX] = {
  57         [HR_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
  58         [HR_V6] = { .name = "v6", .type = BLOBMSG_TYPE_BOOL },
  59 };
  60
  61 static int
  62 netifd_add_host_route(struct ubus_context *ctx, struct ubus_object *obj,
  63                       struct ubus_request_data *req, const char *method,
  64                       struct blob_attr *msg)
  65 {
  66         struct blob_attr *tb[__HR_MAX];
  67         struct interface *iface;
  68         union if_addr a;
  69         bool v6 = false;
  70
  71         blobmsg_parse(route_policy, __HR_MAX, tb, blob_data(msg), blob_len(msg));
  72         if (!tb[HR_TARGET])
  73                 return UBUS_STATUS_INVALID_ARGUMENT;
  74
  75         if (tb[HR_V6])
  76                 v6 = blobmsg_get_bool(tb[HR_V6]);
  77
  78         memset(&a, 0, sizeof(a));
  79         if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(tb[HR_TARGET]), &a))
  80                 return UBUS_STATUS_INVALID_ARGUMENT;
  81
  82
  83         iface = interface_ip_add_target_route(&a, v6);
  84         if (!iface)
  85                 return UBUS_STATUS_NOT_FOUND;
  86
  87         blob_buf_init(&b, 0);
  88         blobmsg_add_string(&b, "interface", iface->name);
  89         ubus_send_reply(ctx, req, b.head);
  90
  91         return 0;
  92 }
  93
  94 static int
  95 netifd_get_proto_handlers(struct ubus_context *ctx, struct ubus_object *obj,
  96                           struct ubus_request_data *req, const char *method,
  97                           struct blob_attr *msg)
  98 {
  99         blob_buf_init(&b, 0);
 100         proto_dump_handlers(&b);
 101         ubus_send_reply(ctx, req, b.head);
 102
 103         return 0;
 104 }
 105
 106 static struct ubus_method main_object_methods[] = {
 107         { .name = "restart", .handler = netifd_handle_restart },
 108         { .name = "reload", .handler = netifd_handle_reload },
 109         UBUS_METHOD("add_host_route", netifd_add_host_route, route_policy),
 110         { .name = "get_proto_handlers", .handler = netifd_get_proto_handlers },
 111 };
 112
 113 static struct ubus_object_type main_object_type =
 114         UBUS_OBJECT_TYPE("netifd", main_object_methods);
 115
 116 static struct ubus_object main_object = {
 117         .name = "network",
 118         .type = &main_object_type,
 119         .methods = main_object_methods,
 120         .n_methods = ARRAY_SIZE(main_object_methods),
 121 };
 122
 123 enum {
 124         DEV_NAME,
 125         __DEV_MAX,
 126 };
 127
 128 static const struct blobmsg_policy dev_policy[__DEV_MAX] = {
 129         [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
 130 };
 131
 132 static int
 133 netifd_dev_status(struct ubus_context *ctx, struct ubus_object *obj,
 134                   struct ubus_request_data *req, const char *method,
 135                   struct blob_attr *msg)
 136 {
 137         struct device *dev = NULL;
 138         struct blob_attr *tb[__DEV_MAX];
 139
 140         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 141
 142         if (tb[DEV_NAME]) {
 143                 dev = device_get(blobmsg_data(tb[DEV_NAME]), false);
 144                 if (!dev)
 145                         return UBUS_STATUS_INVALID_ARGUMENT;
 146         }
 147
 148         blob_buf_init(&b, 0);
 149         device_dump_status(&b, dev);
 150         ubus_send_reply(ctx, req, b.head);
 151
 152         return 0;
 153 }
 154
 155 enum {
 156         ALIAS_ATTR_ALIAS,
 157         ALIAS_ATTR_DEV,
 158         __ALIAS_ATTR_MAX,
 159 };
 160
 161 static const struct blobmsg_policy alias_attrs[__ALIAS_ATTR_MAX] = {
 162         [ALIAS_ATTR_ALIAS] = { "alias", BLOBMSG_TYPE_ARRAY },
 163         [ALIAS_ATTR_DEV] = { "device", BLOBMSG_TYPE_STRING },
 164 };
 165
 166 static int
 167 netifd_handle_alias(struct ubus_context *ctx, struct ubus_object *obj,
 168                     struct ubus_request_data *req, const char *method,
 169                     struct blob_attr *msg)
 170 {
 171         struct device *dev = NULL;
 172         struct blob_attr *tb[__ALIAS_ATTR_MAX];
 173         struct blob_attr *cur;
 174         int rem;
 175
 176         blobmsg_parse(alias_attrs, __ALIAS_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 177
 178         if (!tb[ALIAS_ATTR_ALIAS])
 179                 return UBUS_STATUS_INVALID_ARGUMENT;
 180
 181         if ((cur = tb[ALIAS_ATTR_DEV]) != NULL) {
 182                 dev = device_get(blobmsg_data(cur), true);
 183                 if (!dev)
 184                         return UBUS_STATUS_NOT_FOUND;
 185         }
 186
 187         blobmsg_for_each_attr(cur, tb[ALIAS_ATTR_ALIAS], rem) {
 188                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 189                         goto error;
 190
 191                 if (!blobmsg_check_attr(cur, NULL))
 192                         goto error;
 193
 194                 alias_notify_device(blobmsg_data(cur), dev);
 195         }
 196         return 0;
 197
 198 error:
 199         device_free_unused(dev);
 200         return UBUS_STATUS_INVALID_ARGUMENT;
 201 }
 202
 203 enum {
 204         DEV_STATE_NAME,
 205         DEV_STATE_DEFER,
 206         __DEV_STATE_MAX,
 207 };
 208
 209 static const struct blobmsg_policy dev_state_policy[__DEV_STATE_MAX] = {
 210         [DEV_STATE_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
 211         [DEV_STATE_DEFER] = { .name = "defer", .type = BLOBMSG_TYPE_BOOL },
 212 };
 213
 214 static int
 215 netifd_handle_set_state(struct ubus_context *ctx, struct ubus_object *obj,
 216                         struct ubus_request_data *req, const char *method,
 217                         struct blob_attr *msg)
 218 {
 219         struct device *dev = NULL;
 220         struct blob_attr *tb[__DEV_STATE_MAX];
 221         struct blob_attr *cur;
 222
 223         blobmsg_parse(dev_state_policy, __DEV_STATE_MAX, tb, blob_data(msg), blob_len(msg));
 224
 225         cur = tb[DEV_STATE_NAME];
 226         if (!cur)
 227                 return UBUS_STATUS_INVALID_ARGUMENT;
 228
 229         dev = device_get(blobmsg_data(cur), false);
 230         if (!dev)
 231                 return UBUS_STATUS_NOT_FOUND;
 232
 233         cur = tb[DEV_STATE_DEFER];
 234         if (cur)
 235                 device_set_deferred(dev, !!blobmsg_get_u8(cur));
 236
 237         return 0;
 238 }
 239
 240 static struct ubus_method dev_object_methods[] = {
 241         UBUS_METHOD("status", netifd_dev_status, dev_policy),
 242         UBUS_METHOD("set_alias", netifd_handle_alias, alias_attrs),
 243         UBUS_METHOD("set_state", netifd_handle_set_state, dev_state_policy),
 244 };
 245
 246 static struct ubus_object_type dev_object_type =
 247         UBUS_OBJECT_TYPE("device", dev_object_methods);
 248
 249 static struct ubus_object dev_object = {
 250         .name = "network.device",
 251         .type = &dev_object_type,
 252         .methods = dev_object_methods,
 253         .n_methods = ARRAY_SIZE(dev_object_methods),
 254 };
 255
 256 static void
 257 netifd_ubus_add_fd(void)
 258 {
 259         ubus_add_uloop(ctx);
 260         system_fd_set_cloexec(ctx->sock.fd);
 261 }
 262
 263 static void
 264 netifd_ubus_reconnect_timer(struct uloop_timeout *timeout)
 265 {
 266         static struct uloop_timeout retry = {
 267                 .cb = netifd_ubus_reconnect_timer,
 268         };
 269         int t = 2;
 270
 271         if (ubus_reconnect(ctx, ubus_path) != 0) {
 272                 DPRINTF("failed to reconnect, trying again in %d seconds\n", t);
 273                 uloop_timeout_set(&retry, t * 1000);
 274                 return;
 275         }
 276
 277         DPRINTF("reconnected to ubus, new id: %08x\n", ctx->local_id);
 278         netifd_ubus_add_fd();
 279 }
 280
 281 static void
 282 netifd_ubus_connection_lost(struct ubus_context *ctx)
 283 {
 284         netifd_ubus_reconnect_timer(NULL);
 285 }
 286
 287 int
 288 netifd_ubus_init(const char *path)
 289 {
 290         int ret;
 291
 292         uloop_init();
 293         ubus_path = path;
 294
 295         ctx = ubus_connect(path);
 296         if (!ctx)
 297                 return -EIO;
 298
 299         DPRINTF("connected as %08x\n", ctx->local_id);
 300         ctx->connection_lost = netifd_ubus_connection_lost;
 301         netifd_ubus_add_fd();
 302
 303         ret = ubus_add_object(ctx, &main_object);
 304         if (ret)
 305                 goto out;
 306
 307         ret = ubus_add_object(ctx, &dev_object);
 308
 309 out:
 310         if (ret != 0)
 311                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
 312         return ret;
 313 }
 314
 315 void
 316 netifd_ubus_done(void)
 317 {
 318         ubus_free(ctx);
 319 }
 320
 321
 322 /* per-interface object */
 323
 324 static int
 325 netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
 326                  struct ubus_request_data *req, const char *method,
 327                  struct blob_attr *msg)
 328 {
 329         struct interface *iface;
 330
 331         iface = container_of(obj, struct interface, ubus);
 332         interface_set_up(iface);
 333
 334         return 0;
 335 }
 336
 337 static int
 338 netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 339                    struct ubus_request_data *req, const char *method,
 340                    struct blob_attr *msg)
 341 {
 342         struct interface *iface;
 343
 344         iface = container_of(obj, struct interface, ubus);
 345         interface_set_down(iface);
 346
 347         return 0;
 348 }
 349
 350 static void
 351 netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 352 {
 353         struct interface_error *error;
 354         void *e, *e2, *e3;
 355         int i;
 356
 357         e = blobmsg_open_array(b, "errors");
 358         list_for_each_entry(error, &iface->errors, list) {
 359                 e2 = blobmsg_open_table(b, NULL);
 360
 361                 blobmsg_add_string(b, "subsystem", error->subsystem);
 362                 blobmsg_add_string(b, "code", error->code);
 363                 if (error->data[0]) {
 364                         e3 = blobmsg_open_array(b, "data");
 365                         for (i = 0; error->data[i]; i++)
 366                                 blobmsg_add_string(b, NULL, error->data[i]);
 367                         blobmsg_close_array(b, e3);
 368                 }
 369
 370                 blobmsg_close_table(b, e2);
 371         }
 372         blobmsg_close_array(b, e);
 373 }
 374
 375 static void
 376 interface_ip_dump_address_list(struct interface_ip_settings *ip, bool v6,
 377                                bool enabled)
 378 {
 379         struct device_addr *addr;
 380         char *buf;
 381         void *a;
 382         int buflen = 128;
 383         int af;
 384
 385         vlist_for_each_element(&ip->addr, addr, node) {
 386                 if (addr->enabled != enabled)
 387                         continue;
 388
 389                 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4)
 390                         af = AF_INET;
 391                 else
 392                         af = AF_INET6;
 393
 394                 if (af != (v6 ? AF_INET6 : AF_INET))
 395                         continue;
 396
 397                 a = blobmsg_open_table(&b, NULL);
 398
 399                 buf = blobmsg_alloc_string_buffer(&b, "address", buflen);
 400                 inet_ntop(af, &addr->addr, buf, buflen);
 401                 blobmsg_add_string_buffer(&b);
 402
 403                 blobmsg_add_u32(&b, "mask", addr->mask);
 404
 405                 blobmsg_close_table(&b, a);
 406         }
 407 }
 408
 409 static void
 410 interface_ip_dump_route_list(struct interface_ip_settings *ip, bool enabled)
 411 {
 412         struct device_route *route;
 413         int buflen = 128;
 414         char *buf;
 415         void *r;
 416         int af;
 417
 418         vlist_for_each_element(&ip->route, route, node) {
 419                 if (route->enabled != enabled)
 420                         continue;
 421
 422                 if ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4)
 423                         af = AF_INET;
 424                 else
 425                         af = AF_INET6;
 426
 427                 r = blobmsg_open_table(&b, NULL);
 428
 429                 buf = blobmsg_alloc_string_buffer(&b, "target", buflen);
 430                 inet_ntop(af, &route->addr, buf, buflen);
 431                 blobmsg_add_string_buffer(&b);
 432
 433                 blobmsg_add_u32(&b, "mask", route->mask);
 434
 435                 buf = blobmsg_alloc_string_buffer(&b, "nexthop", buflen);
 436                 inet_ntop(af, &route->nexthop, buf, buflen);
 437                 blobmsg_add_string_buffer(&b);
 438
 439                 if (route->flags & DEVROUTE_MTU)
 440                         blobmsg_add_u32(&b, "mtu", route->mtu);
 441
 442                 if (route->flags & DEVROUTE_METRIC)
 443                         blobmsg_add_u32(&b, "metric", route->metric);
 444
 445                 blobmsg_close_table(&b, r);
 446         }
 447 }
 448
 449 static void
 450 interface_ip_dump_dns_server_list(struct interface_ip_settings *ip,
 451                                   bool enabled)
 452 {
 453         struct dns_server *dns;
 454         int buflen = 128;
 455         char *buf;
 456
 457         vlist_simple_for_each_element(&ip->dns_servers, dns, node) {
 458                 if (ip->no_dns == enabled)
 459                         continue;
 460
 461                 buf = blobmsg_alloc_string_buffer(&b, NULL, buflen);
 462                 inet_ntop(dns->af, &dns->addr, buf, buflen);
 463                 blobmsg_add_string_buffer(&b);
 464         }
 465 }
 466
 467 static void
 468 interface_ip_dump_dns_search_list(struct interface_ip_settings *ip,
 469                                   bool enabled)
 470 {
 471         struct dns_search_domain *dns;
 472
 473         vlist_simple_for_each_element(&ip->dns_search, dns, node) {
 474                 if (ip->no_dns == enabled)
 475                         continue;
 476
 477                 blobmsg_add_string(&b, NULL, dns->name);
 478         }
 479 }
 480
 481 static int
 482 netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 483                      struct ubus_request_data *req, const char *method,
 484                      struct blob_attr *msg)
 485 {
 486         struct interface *iface;
 487         struct interface_data *data;
 488         struct device *dev;
 489         void *a, *inactive;
 490
 491         iface = container_of(obj, struct interface, ubus);
 492
 493         blob_buf_init(&b, 0);
 494         blobmsg_add_u8(&b, "up", iface->state == IFS_UP);
 495         blobmsg_add_u8(&b, "pending", iface->state == IFS_SETUP);
 496         blobmsg_add_u8(&b, "available", iface->available);
 497         blobmsg_add_u8(&b, "autostart", iface->autostart);
 498
 499         if (iface->state == IFS_UP) {
 500                 time_t cur = system_get_rtime();
 501                 blobmsg_add_u32(&b, "uptime", cur - iface->start_time);
 502                 blobmsg_add_string(&b, "l3_device", iface->l3_dev.dev->ifname);
 503         }
 504
 505         if (iface->proto_handler)
 506                 blobmsg_add_string(&b, "proto", iface->proto_handler->name);
 507
 508         dev = iface->main_dev.dev;
 509         if (dev && !dev->hidden &&
 510             !(iface->proto_handler->flags & PROTO_FLAG_NODEV))
 511                 blobmsg_add_string(&b, "device", dev->ifname);
 512
 513         if (iface->state == IFS_UP) {
 514                 blobmsg_add_u32(&b, "metric", iface->metric);
 515                 a = blobmsg_open_array(&b, "ipv4-address");
 516                 interface_ip_dump_address_list(&iface->config_ip, false, true);
 517                 interface_ip_dump_address_list(&iface->proto_ip, false, true);
 518                 blobmsg_close_array(&b, a);
 519                 a = blobmsg_open_array(&b, "ipv6-address");
 520                 interface_ip_dump_address_list(&iface->config_ip, true, true);
 521                 interface_ip_dump_address_list(&iface->proto_ip, true, true);
 522                 blobmsg_close_array(&b, a);
 523                 a = blobmsg_open_array(&b, "route");
 524                 interface_ip_dump_route_list(&iface->config_ip, true);
 525                 interface_ip_dump_route_list(&iface->proto_ip, true);
 526                 blobmsg_close_array(&b, a);
 527                 a = blobmsg_open_array(&b, "dns-server");
 528                 interface_ip_dump_dns_server_list(&iface->config_ip, true);
 529                 interface_ip_dump_dns_server_list(&iface->proto_ip, true);
 530                 blobmsg_close_array(&b, a);
 531                 a = blobmsg_open_array(&b, "dns-search");
 532                 interface_ip_dump_dns_search_list(&iface->config_ip, true);
 533                 interface_ip_dump_dns_search_list(&iface->proto_ip, true);
 534                 blobmsg_close_array(&b, a);
 535
 536                 inactive = blobmsg_open_table(&b, "inactive");
 537                 a = blobmsg_open_array(&b, "ipv4-address");
 538                 interface_ip_dump_address_list(&iface->config_ip, false, false);
 539                 interface_ip_dump_address_list(&iface->proto_ip, false, false);
 540                 blobmsg_close_array(&b, a);
 541                 a = blobmsg_open_array(&b, "ipv6-address");
 542                 interface_ip_dump_address_list(&iface->config_ip, true, false);
 543                 interface_ip_dump_address_list(&iface->proto_ip, true, false);
 544                 blobmsg_close_array(&b, a);
 545                 a = blobmsg_open_array(&b, "route");
 546                 interface_ip_dump_route_list(&iface->config_ip, false);
 547                 interface_ip_dump_route_list(&iface->proto_ip, false);
 548                 blobmsg_close_array(&b, a);
 549                 a = blobmsg_open_array(&b, "dns-server");
 550                 interface_ip_dump_dns_server_list(&iface->config_ip, false);
 551                 interface_ip_dump_dns_server_list(&iface->proto_ip, false);
 552                 blobmsg_close_array(&b, a);
 553                 a = blobmsg_open_array(&b, "dns-search");
 554                 interface_ip_dump_dns_search_list(&iface->config_ip, false);
 555                 interface_ip_dump_dns_search_list(&iface->proto_ip, false);
 556                 blobmsg_close_array(&b, a);
 557                 blobmsg_close_table(&b, inactive);
 558         }
 559
 560         a = blobmsg_open_table(&b, "data");
 561         avl_for_each_element(&iface->data, data, node)
 562                 blob_put(&b, blob_id(data->data), blob_data(data->data), blob_len(data->data));
 563
 564         blobmsg_close_table(&b, a);
 565
 566         if (!list_is_empty(&iface->errors))
 567                 netifd_add_interface_errors(&b, iface);
 568
 569         ubus_send_reply(ctx, req, b.head);
 570
 571         return 0;
 572 }
 573
 574 static int
 575 netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
 576                            struct ubus_request_data *req, const char *method,
 577                            struct blob_attr *msg)
 578 {
 579         struct blob_attr *tb[__DEV_MAX];
 580         struct interface *iface;
 581         struct device *dev;
 582         bool add = !strncmp(method, "add", 3);
 583         int ret;
 584
 585         iface = container_of(obj, struct interface, ubus);
 586
 587         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 588
 589         if (!tb[DEV_NAME])
 590                 return UBUS_STATUS_INVALID_ARGUMENT;
 591
 592         device_lock();
 593
 594         dev = device_get(blobmsg_data(tb[DEV_NAME]), add ? 2 : 0);
 595         if (!dev) {
 596                 ret = UBUS_STATUS_NOT_FOUND;
 597                 goto out;
 598         }
 599
 600         if (add) {
 601                 device_set_present(dev, true);
 602                 if (iface->device_config)
 603                         device_set_config(dev, &simple_device_type, iface->config);
 604
 605                 system_if_apply_settings(dev, &dev->settings);
 606                 ret = interface_add_link(iface, dev);
 607         } else {
 608                 ret = interface_remove_link(iface, dev);
 609         }
 610
 611 out:
 612         device_unlock();
 613
 614         return ret;
 615 }
 616
 617
 618 static int
 619 netifd_iface_notify_proto(struct ubus_context *ctx, struct ubus_object *obj,
 620                           struct ubus_request_data *req, const char *method,
 621                           struct blob_attr *msg)
 622 {
 623         struct interface *iface;
 624
 625         iface = container_of(obj, struct interface, ubus);
 626
 627         if (!iface->proto || !iface->proto->notify)
 628                 return UBUS_STATUS_NOT_SUPPORTED;
 629
 630         return iface->proto->notify(iface->proto, msg);
 631 }
 632
 633 static void
 634 netifd_iface_do_remove(struct uloop_timeout *timeout)
 635 {
 636         struct interface *iface;
 637
 638         iface = container_of(timeout, struct interface, remove_timer);
 639         vlist_delete(&interfaces, &iface->node);
 640 }
 641
 642 static int
 643 netifd_iface_remove(struct ubus_context *ctx, struct ubus_object *obj,
 644                     struct ubus_request_data *req, const char *method,
 645                     struct blob_attr *msg)
 646 {
 647         struct interface *iface;
 648
 649         iface = container_of(obj, struct interface, ubus);
 650         if (iface->remove_timer.cb)
 651                 return UBUS_STATUS_INVALID_ARGUMENT;
 652
 653         iface->remove_timer.cb = netifd_iface_do_remove;
 654         uloop_timeout_set(&iface->remove_timer, 100);
 655         return 0;
 656 }
 657
 658 static int
 659 netifd_handle_iface_prepare(struct ubus_context *ctx, struct ubus_object *obj,
 660                             struct ubus_request_data *req, const char *method,
 661                             struct blob_attr *msg)
 662 {
 663         struct interface *iface;
 664         struct device *dev;
 665         const struct device_hotplug_ops *ops;
 666
 667         iface = container_of(obj, struct interface, ubus);
 668         dev = iface->main_dev.dev;
 669         if (!dev)
 670                 return 0;
 671
 672         ops = dev->hotplug_ops;
 673         if (!ops)
 674                 return 0;
 675
 676         return ops->prepare(dev);
 677 }
 678
 679 static int
 680 netifd_handle_set_data(struct ubus_context *ctx, struct ubus_object *obj,
 681                        struct ubus_request_data *req, const char *method,
 682                        struct blob_attr *msg)
 683 {
 684         struct interface *iface;
 685         struct blob_attr *cur;
 686         int rem, ret;
 687
 688         iface = container_of(obj, struct interface, ubus);
 689
 690         blob_for_each_attr(cur, msg, rem) {
 691                 ret = interface_add_data(iface, cur);
 692                 if (ret)
 693                         return ret;
 694         }
 695
 696         return 0;
 697 }
 698
 699 static struct ubus_method iface_object_methods[] = {
 700         { .name = "up", .handler = netifd_handle_up },
 701         { .name = "down", .handler = netifd_handle_down },
 702         { .name = "status", .handler = netifd_handle_status },
 703         { .name = "prepare", .handler = netifd_handle_iface_prepare },
 704         UBUS_METHOD("add_device", netifd_iface_handle_device, dev_policy ),
 705         UBUS_METHOD("remove_device", netifd_iface_handle_device, dev_policy ),
 706         { .name = "notify_proto", .handler = netifd_iface_notify_proto },
 707         { .name = "remove", .handler = netifd_iface_remove },
 708         { .name = "set_data", .handler = netifd_handle_set_data },
 709 };
 710
 711 static struct ubus_object_type iface_object_type =
 712         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 713
 714
 715 void
 716 netifd_ubus_interface_event(struct interface *iface, bool up)
 717 {
 718         blob_buf_init(&b, 0);
 719         blobmsg_add_string(&b, "action", up ? "ifup" : "ifdown");
 720         blobmsg_add_string(&b, "interface", iface->name);
 721         ubus_send_event(ctx, "network.interface", b.head);
 722 }
 723
 724 void
 725 netifd_ubus_add_interface(struct interface *iface)
 726 {
 727         struct ubus_object *obj = &iface->ubus;
 728         char *name = NULL;
 729
 730         if (asprintf(&name, "%s.interface.%s", main_object.name, iface->name) == -1)
 731                 return;
 732
 733         obj->name = name;
 734         obj->type = &iface_object_type;
 735         obj->methods = iface_object_methods;
 736         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 737         if (ubus_add_object(ctx, &iface->ubus)) {
 738                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 739                 free(name);
 740                 obj->name = NULL;
 741         }
 742 }
 743
 744 void
 745 netifd_ubus_remove_interface(struct interface *iface)
 746 {
 747         if (!iface->ubus.name)
 748                 return;
 749
 750         ubus_remove_object(ctx, &iface->ubus);
 751         free((void *) iface->ubus.name);
 752 }