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 struct netifd_fd ubus_fd;
  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 struct ubus_method main_object_methods[] = {
  95         { .name = "restart", .handler = netifd_handle_restart },
  96         { .name = "reload", .handler = netifd_handle_reload },
  97         UBUS_METHOD("add_host_route", netifd_add_host_route, route_policy),
  98 };
  99
 100 static struct ubus_object_type main_object_type =
 101         UBUS_OBJECT_TYPE("netifd", main_object_methods);
 102
 103 static struct ubus_object main_object = {
 104         .name = "network",
 105         .type = &main_object_type,
 106         .methods = main_object_methods,
 107         .n_methods = ARRAY_SIZE(main_object_methods),
 108 };
 109
 110 enum {
 111         DEV_NAME,
 112         __DEV_MAX,
 113 };
 114
 115 static const struct blobmsg_policy dev_policy[__DEV_MAX] = {
 116         [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
 117 };
 118
 119 static int
 120 netifd_dev_status(struct ubus_context *ctx, struct ubus_object *obj,
 121                   struct ubus_request_data *req, const char *method,
 122                   struct blob_attr *msg)
 123 {
 124         struct device *dev = NULL;
 125         struct blob_attr *tb[__DEV_MAX];
 126
 127         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 128
 129         if (tb[DEV_NAME]) {
 130                 dev = device_get(blobmsg_data(tb[DEV_NAME]), false);
 131                 if (!dev)
 132                         return UBUS_STATUS_INVALID_ARGUMENT;
 133         }
 134
 135         blob_buf_init(&b, 0);
 136         device_dump_status(&b, dev);
 137         ubus_send_reply(ctx, req, b.head);
 138
 139         return 0;
 140 }
 141
 142 enum {
 143         ALIAS_ATTR_ALIAS,
 144         ALIAS_ATTR_DEV,
 145         __ALIAS_ATTR_MAX,
 146 };
 147
 148 static const struct blobmsg_policy alias_attrs[__ALIAS_ATTR_MAX] = {
 149         [ALIAS_ATTR_ALIAS] = { "alias", BLOBMSG_TYPE_ARRAY },
 150         [ALIAS_ATTR_DEV] = { "device", BLOBMSG_TYPE_STRING },
 151 };
 152
 153 static int
 154 netifd_handle_alias(struct ubus_context *ctx, struct ubus_object *obj,
 155                     struct ubus_request_data *req, const char *method,
 156                     struct blob_attr *msg)
 157 {
 158         struct device *dev = NULL;
 159         struct blob_attr *tb[__ALIAS_ATTR_MAX];
 160         struct blob_attr *cur;
 161         int rem;
 162
 163         blobmsg_parse(alias_attrs, __ALIAS_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 164
 165         if (!tb[ALIAS_ATTR_ALIAS])
 166                 return UBUS_STATUS_INVALID_ARGUMENT;
 167
 168         if ((cur = tb[ALIAS_ATTR_DEV]) != NULL) {
 169                 dev = device_get(blobmsg_data(cur), true);
 170                 if (!dev)
 171                         return UBUS_STATUS_NOT_FOUND;
 172         }
 173
 174         blobmsg_for_each_attr(cur, tb[ALIAS_ATTR_ALIAS], rem) {
 175                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 176                         goto error;
 177
 178                 if (!blobmsg_check_attr(cur, NULL))
 179                         goto error;
 180
 181                 alias_notify_device(blobmsg_data(cur), dev);
 182         }
 183         return 0;
 184
 185 error:
 186         device_free_unused(dev);
 187         return UBUS_STATUS_INVALID_ARGUMENT;
 188 }
 189
 190 static struct ubus_method dev_object_methods[] = {
 191         UBUS_METHOD("status", netifd_dev_status, dev_policy),
 192         UBUS_METHOD("set_alias", netifd_handle_alias, alias_attrs),
 193 };
 194
 195 static struct ubus_object_type dev_object_type =
 196         UBUS_OBJECT_TYPE("device", dev_object_methods);
 197
 198 static struct ubus_object dev_object = {
 199         .name = "network.device",
 200         .type = &dev_object_type,
 201         .methods = dev_object_methods,
 202         .n_methods = ARRAY_SIZE(dev_object_methods),
 203 };
 204
 205 int
 206 netifd_ubus_init(const char *path)
 207 {
 208         int ret;
 209
 210         ctx = ubus_connect(path);
 211         if (!ctx)
 212                 return -EIO;
 213
 214         DPRINTF("connected as %08x\n", ctx->local_id);
 215         uloop_init();
 216         ubus_add_uloop(ctx);
 217         ubus_fd.fd = ctx->sock.fd;
 218         netifd_fd_add(&ubus_fd);
 219
 220         ret = ubus_add_object(ctx, &main_object);
 221         if (ret)
 222                 goto out;
 223
 224         ret = ubus_add_object(ctx, &dev_object);
 225
 226 out:
 227         if (ret != 0)
 228                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
 229         return ret;
 230 }
 231
 232 void
 233 netifd_ubus_done(void)
 234 {
 235         ubus_free(ctx);
 236 }
 237
 238
 239 /* per-interface object */
 240
 241 static int
 242 netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
 243                  struct ubus_request_data *req, const char *method,
 244                  struct blob_attr *msg)
 245 {
 246         struct interface *iface;
 247
 248         iface = container_of(obj, struct interface, ubus);
 249         interface_set_up(iface);
 250
 251         return 0;
 252 }
 253
 254 static int
 255 netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 256                    struct ubus_request_data *req, const char *method,
 257                    struct blob_attr *msg)
 258 {
 259         struct interface *iface;
 260
 261         iface = container_of(obj, struct interface, ubus);
 262         interface_set_down(iface);
 263
 264         return 0;
 265 }
 266
 267 static void
 268 netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 269 {
 270         struct interface_error *error;
 271         void *e, *e2, *e3;
 272         int i;
 273
 274         e = blobmsg_open_array(b, "errors");
 275         list_for_each_entry(error, &iface->errors, list) {
 276                 e2 = blobmsg_open_table(b, NULL);
 277
 278                 blobmsg_add_string(b, "subsystem", error->subsystem);
 279                 blobmsg_add_string(b, "code", error->code);
 280                 if (error->data[0]) {
 281                         e3 = blobmsg_open_array(b, "data");
 282                         for (i = 0; error->data[i]; i++)
 283                                 blobmsg_add_string(b, NULL, error->data[i]);
 284                         blobmsg_close_array(b, e3);
 285                 }
 286
 287                 blobmsg_close_table(b, e2);
 288         }
 289         blobmsg_close_array(b, e);
 290 }
 291
 292 static void
 293 interface_ip_dump_address_list(struct interface_ip_settings *ip, bool v6)
 294 {
 295         struct device_addr *addr;
 296         char *buf;
 297         void *a;
 298         int buflen = 128;
 299         int af;
 300
 301         vlist_for_each_element(&ip->addr, addr, node) {
 302                 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4)
 303                         af = AF_INET;
 304                 else
 305                         af = AF_INET6;
 306
 307                 if (af != (v6 ? AF_INET6 : AF_INET))
 308                         continue;
 309
 310                 a = blobmsg_open_table(&b, NULL);
 311
 312                 buf = blobmsg_alloc_string_buffer(&b, "address", buflen);
 313                 inet_ntop(af, &addr->addr, buf, buflen);
 314                 blobmsg_add_string_buffer(&b);
 315
 316                 blobmsg_add_u32(&b, "mask", addr->mask);
 317
 318                 blobmsg_close_table(&b, a);
 319         }
 320 }
 321
 322 static void
 323 interface_ip_dump_route_list(struct interface_ip_settings *ip)
 324 {
 325         struct device_route *route;
 326         static char *buf;
 327         int buflen = 128;
 328         void *r;
 329         int af;
 330
 331         vlist_for_each_element(&ip->route, route, node) {
 332                 if ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4)
 333                         af = AF_INET;
 334                 else
 335                         af = AF_INET6;
 336
 337                 r = blobmsg_open_table(&b, NULL);
 338
 339                 buf = blobmsg_alloc_string_buffer(&b, "target", buflen);
 340                 inet_ntop(af, &route->addr, buf, buflen);
 341                 blobmsg_add_string_buffer(&b);
 342
 343                 blobmsg_add_u32(&b, "mask", route->mask);
 344
 345                 buf = blobmsg_alloc_string_buffer(&b, "nexthop", buflen);
 346                 inet_ntop(af, &route->nexthop, buf, buflen);
 347                 blobmsg_add_string_buffer(&b);
 348
 349                 blobmsg_close_table(&b, r);
 350         }
 351 }
 352
 353 static int
 354 netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 355                      struct ubus_request_data *req, const char *method,
 356                      struct blob_attr *msg)
 357 {
 358         struct interface *iface;
 359         struct interface_data *data;
 360         struct device *dev;
 361         void *a;
 362
 363         iface = container_of(obj, struct interface, ubus);
 364
 365         blob_buf_init(&b, 0);
 366         blobmsg_add_u8(&b, "up", iface->state == IFS_UP);
 367         blobmsg_add_u8(&b, "pending", iface->state == IFS_SETUP);
 368         blobmsg_add_u8(&b, "available", iface->available);
 369         blobmsg_add_u8(&b, "autostart", iface->autostart);
 370
 371         if (iface->state == IFS_UP) {
 372                 time_t cur = system_get_rtime();
 373                 blobmsg_add_u32(&b, "uptime", cur - iface->start_time);
 374                 blobmsg_add_string(&b, "l3_device", iface->l3_dev.dev->ifname);
 375         }
 376
 377         dev = iface->main_dev.dev;
 378         if (dev && !(iface->proto_handler->flags & PROTO_FLAG_NODEV))
 379                 blobmsg_add_string(&b, "device", dev->ifname);
 380
 381         if (iface->state == IFS_UP) {
 382                 a = blobmsg_open_array(&b, "ipv4-address");
 383                 interface_ip_dump_address_list(&iface->config_ip, false);
 384                 interface_ip_dump_address_list(&iface->proto_ip, false);
 385                 blobmsg_close_array(&b, a);
 386                 a = blobmsg_open_array(&b, "ipv6-address");
 387                 interface_ip_dump_address_list(&iface->config_ip, true);
 388                 interface_ip_dump_address_list(&iface->proto_ip, true);
 389                 blobmsg_close_array(&b, a);
 390                 a = blobmsg_open_array(&b, "route");
 391                 interface_ip_dump_route_list(&iface->config_ip);
 392                 interface_ip_dump_route_list(&iface->proto_ip);
 393                 blobmsg_close_array(&b, a);
 394         }
 395
 396         a = blobmsg_open_table(&b, "data");
 397         avl_for_each_element(&iface->data, data, node)
 398                 blob_put(&b, blob_id(data->data), blob_data(data->data), blob_len(data->data));
 399
 400         blobmsg_close_table(&b, a);
 401
 402         if (!list_is_empty(&iface->errors))
 403                 netifd_add_interface_errors(&b, iface);
 404
 405         ubus_send_reply(ctx, req, b.head);
 406
 407         return 0;
 408 }
 409
 410 static int
 411 netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
 412                            struct ubus_request_data *req, const char *method,
 413                            struct blob_attr *msg)
 414 {
 415         struct blob_attr *tb[__DEV_MAX];
 416         struct interface *iface;
 417         struct device *dev;
 418         bool add = !strncmp(method, "add", 3);
 419         int ret;
 420
 421         iface = container_of(obj, struct interface, ubus);
 422
 423         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 424
 425         if (!tb[DEV_NAME])
 426                 return UBUS_STATUS_INVALID_ARGUMENT;
 427
 428         device_lock();
 429
 430         dev = device_get(blobmsg_data(tb[DEV_NAME]), add ? 2 : 0);
 431         if (add && !dev)
 432                 return UBUS_STATUS_NOT_FOUND;
 433
 434         if (add)
 435                 return interface_add_link(iface, dev);
 436         else
 437                 return interface_remove_link(iface, dev);
 438
 439         device_unlock();
 440
 441         return ret;
 442 }
 443
 444
 445 static int
 446 netifd_iface_notify_proto(struct ubus_context *ctx, struct ubus_object *obj,
 447                           struct ubus_request_data *req, const char *method,
 448                           struct blob_attr *msg)
 449 {
 450         struct interface *iface;
 451
 452         iface = container_of(obj, struct interface, ubus);
 453
 454         if (!iface->proto || !iface->proto->notify)
 455                 return UBUS_STATUS_NOT_SUPPORTED;
 456
 457         return iface->proto->notify(iface->proto, msg);
 458 }
 459
 460 static void
 461 netifd_iface_do_remove(struct uloop_timeout *timeout)
 462 {
 463         struct interface *iface;
 464
 465         iface = container_of(timeout, struct interface, remove_timer);
 466         vlist_delete(&interfaces, &iface->node);
 467 }
 468
 469 static int
 470 netifd_iface_remove(struct ubus_context *ctx, struct ubus_object *obj,
 471                     struct ubus_request_data *req, const char *method,
 472                     struct blob_attr *msg)
 473 {
 474         struct interface *iface;
 475
 476         iface = container_of(obj, struct interface, ubus);
 477         if (iface->remove_timer.cb)
 478                 return UBUS_STATUS_INVALID_ARGUMENT;
 479
 480         iface->remove_timer.cb = netifd_iface_do_remove;
 481         uloop_timeout_set(&iface->remove_timer, 100);
 482         return 0;
 483 }
 484
 485 static int
 486 netifd_handle_iface_prepare(struct ubus_context *ctx, struct ubus_object *obj,
 487                             struct ubus_request_data *req, const char *method,
 488                             struct blob_attr *msg)
 489 {
 490         struct interface *iface;
 491         struct device *dev;
 492         const struct device_hotplug_ops *ops;
 493
 494         iface = container_of(obj, struct interface, ubus);
 495         dev = iface->main_dev.dev;
 496         if (!dev)
 497                 return 0;
 498
 499         ops = dev->hotplug_ops;
 500         if (!ops)
 501                 return 0;
 502
 503         return ops->prepare(dev);
 504 }
 505
 506 static int
 507 netifd_handle_set_data(struct ubus_context *ctx, struct ubus_object *obj,
 508                        struct ubus_request_data *req, const char *method,
 509                        struct blob_attr *msg)
 510 {
 511         struct interface *iface;
 512         struct blob_attr *cur;
 513         int rem, ret;
 514
 515         iface = container_of(obj, struct interface, ubus);
 516
 517         blob_for_each_attr(cur, msg, rem) {
 518                 ret = interface_add_data(iface, cur);
 519                 if (ret)
 520                         return ret;
 521         }
 522
 523         return 0;
 524 }
 525
 526 static struct ubus_method iface_object_methods[] = {
 527         { .name = "up", .handler = netifd_handle_up },
 528         { .name = "down", .handler = netifd_handle_down },
 529         { .name = "status", .handler = netifd_handle_status },
 530         { .name = "prepare", .handler = netifd_handle_iface_prepare },
 531         UBUS_METHOD("add_device", netifd_iface_handle_device, dev_policy ),
 532         UBUS_METHOD("remove_device", netifd_iface_handle_device, dev_policy ),
 533         { .name = "notify_proto", .handler = netifd_iface_notify_proto },
 534         { .name = "remove", .handler = netifd_iface_remove },
 535         { .name = "set_data", .handler = netifd_handle_set_data },
 536 };
 537
 538 static struct ubus_object_type iface_object_type =
 539         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 540
 541
 542 void
 543 netifd_ubus_interface_event(struct interface *iface, bool up)
 544 {
 545         blob_buf_init(&b, 0);
 546         blobmsg_add_string(&b, "action", up ? "ifup" : "ifdown");
 547         blobmsg_add_string(&b, "interface", iface->name);
 548         ubus_send_event(ctx, "network.interface", b.head);
 549 }
 550
 551 void
 552 netifd_ubus_add_interface(struct interface *iface)
 553 {
 554         struct ubus_object *obj = &iface->ubus;
 555         char *name = NULL;
 556
 557         asprintf(&name, "%s.interface.%s", main_object.name, iface->name);
 558         if (!name)
 559                 return;
 560
 561         obj->name = name;
 562         obj->type = &iface_object_type;
 563         obj->methods = iface_object_methods;
 564         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 565         if (ubus_add_object(ctx, &iface->ubus)) {
 566                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 567                 free(name);
 568                 obj->name = NULL;
 569         }
 570 }
 571
 572 void
 573 netifd_ubus_remove_interface(struct interface *iface)
 574 {
 575         if (!iface->ubus.name)
 576                 return;
 577
 578         ubus_remove_object(ctx, &iface->ubus);
 579         free((void *) iface->ubus.name);
 580 }