ubus.c

   1 #define _GNU_SOURCE
   2
   3 #include <string.h>
   4 #include <stdio.h>
   5
   6 #include "netifd.h"
   7 #include "interface.h"
   8 #include "proto.h"
   9 #include "ubus.h"
  10 #include "system.h"
  11
  12 static struct ubus_context *ctx = NULL;
  13 static struct blob_buf b;
  14 static struct netifd_fd ubus_fd;
  15
  16 /* global object */
  17
  18 static int
  19 netifd_handle_restart(struct ubus_context *ctx, struct ubus_object *obj,
  20                       struct ubus_request_data *req, const char *method,
  21                       struct blob_attr *msg)
  22 {
  23         netifd_restart();
  24         return 0;
  25 }
  26
  27 static int
  28 netifd_handle_reload(struct ubus_context *ctx, struct ubus_object *obj,
  29                       struct ubus_request_data *req, const char *method,
  30                       struct blob_attr *msg)
  31 {
  32         netifd_reload();
  33         return 0;
  34 }
  35
  36 static struct ubus_method main_object_methods[] = {
  37         { .name = "restart", .handler = netifd_handle_restart },
  38         { .name = "reload", .handler = netifd_handle_reload },
  39 };
  40
  41 static struct ubus_object_type main_object_type =
  42         UBUS_OBJECT_TYPE("netifd", main_object_methods);
  43
  44 static struct ubus_object main_object = {
  45         .name = "network",
  46         .type = &main_object_type,
  47         .methods = main_object_methods,
  48         .n_methods = ARRAY_SIZE(main_object_methods),
  49 };
  50
  51 enum {
  52         DEV_NAME,
  53         __DEV_MAX,
  54 };
  55
  56 static const struct blobmsg_policy dev_policy[__DEV_MAX] = {
  57         [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
  58 };
  59
  60 static int
  61 netifd_dev_status(struct ubus_context *ctx, struct ubus_object *obj,
  62                   struct ubus_request_data *req, const char *method,
  63                   struct blob_attr *msg)
  64 {
  65         struct device *dev = NULL;
  66         struct blob_attr *tb[__DEV_MAX];
  67
  68         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
  69
  70         if (tb[DEV_NAME]) {
  71                 dev = device_get(blobmsg_data(tb[DEV_NAME]), false);
  72                 if (!dev)
  73                         return UBUS_STATUS_INVALID_ARGUMENT;
  74         }
  75
  76         blob_buf_init(&b, 0);
  77         device_dump_status(&b, dev);
  78         ubus_send_reply(ctx, req, b.head);
  79
  80         return 0;
  81 }
  82
  83 enum {
  84         ALIAS_ATTR_ALIAS,
  85         ALIAS_ATTR_DEV,
  86         __ALIAS_ATTR_MAX,
  87 };
  88
  89 static const struct blobmsg_policy alias_attrs[__ALIAS_ATTR_MAX] = {
  90         [ALIAS_ATTR_ALIAS] = { "alias", BLOBMSG_TYPE_ARRAY },
  91         [ALIAS_ATTR_DEV] = { "device", BLOBMSG_TYPE_STRING },
  92 };
  93
  94 static int
  95 netifd_handle_alias(struct ubus_context *ctx, struct ubus_object *obj,
  96                     struct ubus_request_data *req, const char *method,
  97                     struct blob_attr *msg)
  98 {
  99         struct device *dev = NULL;
 100         struct blob_attr *tb[__ALIAS_ATTR_MAX];
 101         struct blob_attr *cur;
 102         int rem;
 103
 104         blobmsg_parse(alias_attrs, __ALIAS_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 105
 106         if (!tb[ALIAS_ATTR_ALIAS])
 107                 return UBUS_STATUS_INVALID_ARGUMENT;
 108
 109         if ((cur = tb[ALIAS_ATTR_DEV]) != NULL) {
 110                 dev = device_get(blobmsg_data(cur), true);
 111                 if (!dev)
 112                         return UBUS_STATUS_NOT_FOUND;
 113         }
 114
 115         blobmsg_for_each_attr(cur, tb[ALIAS_ATTR_ALIAS], rem) {
 116                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 117                         goto error;
 118
 119                 if (!blobmsg_check_attr(cur, NULL))
 120                         goto error;
 121
 122                 alias_notify_device(blobmsg_data(cur), dev);
 123         }
 124         return 0;
 125
 126 error:
 127         device_free_unused(dev);
 128         return UBUS_STATUS_INVALID_ARGUMENT;
 129 }
 130
 131 static struct ubus_method dev_object_methods[] = {
 132         UBUS_METHOD("status", netifd_dev_status, dev_policy),
 133         UBUS_METHOD("set_alias", netifd_handle_alias, alias_attrs),
 134 };
 135
 136 static struct ubus_object_type dev_object_type =
 137         UBUS_OBJECT_TYPE("device", dev_object_methods);
 138
 139 static struct ubus_object dev_object = {
 140         .name = "network.device",
 141         .type = &dev_object_type,
 142         .methods = dev_object_methods,
 143         .n_methods = ARRAY_SIZE(dev_object_methods),
 144 };
 145
 146 int
 147 netifd_ubus_init(const char *path)
 148 {
 149         int ret;
 150
 151         ctx = ubus_connect(path);
 152         if (!ctx)
 153                 return -EIO;
 154
 155         DPRINTF("connected as %08x\n", ctx->local_id);
 156         uloop_init();
 157         ubus_add_uloop(ctx);
 158         ubus_fd.fd = ctx->sock.fd;
 159         netifd_fd_add(&ubus_fd);
 160
 161         ret = ubus_add_object(ctx, &main_object);
 162         if (ret)
 163                 goto out;
 164
 165         ret = ubus_add_object(ctx, &dev_object);
 166
 167 out:
 168         if (ret != 0)
 169                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
 170         return ret;
 171 }
 172
 173 void
 174 netifd_ubus_done(void)
 175 {
 176         ubus_free(ctx);
 177 }
 178
 179
 180 /* per-interface object */
 181
 182 static int
 183 netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
 184                  struct ubus_request_data *req, const char *method,
 185                  struct blob_attr *msg)
 186 {
 187         struct interface *iface;
 188
 189         iface = container_of(obj, struct interface, ubus);
 190         interface_set_up(iface);
 191
 192         return 0;
 193 }
 194
 195 static int
 196 netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 197                    struct ubus_request_data *req, const char *method,
 198                    struct blob_attr *msg)
 199 {
 200         struct interface *iface;
 201
 202         iface = container_of(obj, struct interface, ubus);
 203         interface_set_down(iface);
 204
 205         return 0;
 206 }
 207
 208 static void
 209 netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 210 {
 211         struct interface_error *error;
 212         void *e, *e2, *e3;
 213         int i;
 214
 215         e = blobmsg_open_array(b, "errors");
 216         list_for_each_entry(error, &iface->errors, list) {
 217                 e2 = blobmsg_open_table(b, NULL);
 218
 219                 blobmsg_add_string(b, "subsystem", error->subsystem);
 220                 blobmsg_add_string(b, "code", error->code);
 221                 if (error->data[0]) {
 222                         e3 = blobmsg_open_array(b, "data");
 223                         for (i = 0; error->data[i]; i++)
 224                                 blobmsg_add_string(b, NULL, error->data[i]);
 225                         blobmsg_close_array(b, e3);
 226                 }
 227
 228                 blobmsg_close_table(b, e2);
 229         }
 230         blobmsg_close_array(b, e);
 231 }
 232
 233 static int
 234 netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 235                      struct ubus_request_data *req, const char *method,
 236                      struct blob_attr *msg)
 237 {
 238         struct interface *iface;
 239         struct device *dev;
 240
 241         iface = container_of(obj, struct interface, ubus);
 242
 243         blob_buf_init(&b, 0);
 244         blobmsg_add_u8(&b, "up", iface->state == IFS_UP);
 245         blobmsg_add_u8(&b, "pending", iface->state == IFS_SETUP);
 246         blobmsg_add_u8(&b, "available", iface->available);
 247         blobmsg_add_u8(&b, "autostart", iface->autostart);
 248
 249         if (iface->state == IFS_UP) {
 250                 time_t cur = system_get_rtime();
 251                 blobmsg_add_u32(&b, "uptime", cur - iface->start_time);
 252                 blobmsg_add_string(&b, "l3_device", iface->l3_dev->dev->ifname);
 253         }
 254
 255         dev = iface->main_dev.dev;
 256         if (dev && !(iface->proto_handler->flags & PROTO_FLAG_NODEV))
 257                 blobmsg_add_string(&b, "device", dev->ifname);
 258
 259         if (!list_is_empty(&iface->errors))
 260                 netifd_add_interface_errors(&b, iface);
 261
 262         ubus_send_reply(ctx, req, b.head);
 263
 264         return 0;
 265 }
 266
 267 static int
 268 netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
 269                            struct ubus_request_data *req, const char *method,
 270                            struct blob_attr *msg)
 271 {
 272         struct interface *iface;
 273         struct device *dev, *main_dev = NULL;
 274         struct blob_attr *tb[__DEV_MAX];
 275         bool add = !strncmp(method, "add", 3);
 276         const char *devname;
 277         int ret;
 278
 279         iface = container_of(obj, struct interface, ubus);
 280
 281         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 282
 283         if (!tb[DEV_NAME])
 284                 return UBUS_STATUS_INVALID_ARGUMENT;
 285
 286         devname = blobmsg_data(tb[DEV_NAME]);
 287         dev = iface->main_dev.dev;
 288         if (iface->hotplug_dev && dev && !add) {
 289                 if (strcmp(dev->ifname, devname) != 0)
 290                         return UBUS_STATUS_INVALID_ARGUMENT;
 291         }
 292
 293         if (iface->hotplug_dev) {
 294                 if (iface->main_dev.dev) {
 295                         interface_set_available(iface, false);
 296                         device_remove_user(&iface->main_dev);
 297                 }
 298         } else
 299                 main_dev = iface->main_dev.dev;
 300
 301         dev = device_get(blobmsg_data(tb[DEV_NAME]), add);
 302         if (!dev)
 303                 return UBUS_STATUS_NOT_FOUND;
 304
 305         if (!main_dev) {
 306                 if (add) {
 307                         device_add_user(&iface->main_dev, dev);
 308                         iface->hotplug_dev = true;
 309                 }
 310                 ret = 0;
 311                 goto out;
 312         }
 313
 314         if (!main_dev->hotplug_ops) {
 315                 ret = UBUS_STATUS_NOT_SUPPORTED;
 316                 goto out;
 317         }
 318
 319         if (main_dev != dev) {
 320                 if (add)
 321                         ret = main_dev->hotplug_ops->add(main_dev, dev);
 322                 else
 323                         ret = main_dev->hotplug_ops->del(main_dev, dev);
 324                 if (ret)
 325                         ret = UBUS_STATUS_UNKNOWN_ERROR;
 326         } else {
 327                 ret = UBUS_STATUS_INVALID_ARGUMENT;
 328         }
 329
 330 out:
 331         if (add)
 332                 device_free_unused(dev);
 333
 334         return ret;
 335 }
 336
 337
 338 static int
 339 netifd_iface_notify_proto(struct ubus_context *ctx, struct ubus_object *obj,
 340                           struct ubus_request_data *req, const char *method,
 341                           struct blob_attr *msg)
 342 {
 343         struct interface *iface;
 344
 345         iface = container_of(obj, struct interface, ubus);
 346
 347         if (!iface->proto || !iface->proto->notify)
 348                 return UBUS_STATUS_NOT_SUPPORTED;
 349
 350         return iface->proto->notify(iface->proto, msg);
 351 }
 352
 353 static void
 354 netifd_iface_do_remove(struct uloop_timeout *timeout)
 355 {
 356         struct interface *iface;
 357
 358         iface = container_of(timeout, struct interface, remove_timer);
 359         vlist_delete(&interfaces, &iface->node);
 360 }
 361
 362 static int
 363 netifd_iface_remove(struct ubus_context *ctx, struct ubus_object *obj,
 364                     struct ubus_request_data *req, const char *method,
 365                     struct blob_attr *msg)
 366 {
 367         struct interface *iface;
 368
 369         iface = container_of(obj, struct interface, ubus);
 370         if (iface->remove_timer.cb)
 371                 return UBUS_STATUS_INVALID_ARGUMENT;
 372
 373         iface->remove_timer.cb = netifd_iface_do_remove;
 374         uloop_timeout_set(&iface->remove_timer, 100);
 375         return 0;
 376 }
 377
 378 static struct ubus_method iface_object_methods[] = {
 379         { .name = "up", .handler = netifd_handle_up },
 380         { .name = "down", .handler = netifd_handle_down },
 381         { .name = "status", .handler = netifd_handle_status },
 382         UBUS_METHOD("add_device", netifd_iface_handle_device, dev_policy ),
 383         UBUS_METHOD("remove_device", netifd_iface_handle_device, dev_policy ),
 384         { .name = "notify_proto", .handler = netifd_iface_notify_proto },
 385         { .name = "remove", .handler = netifd_iface_remove }
 386 };
 387
 388 static struct ubus_object_type iface_object_type =
 389         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 390
 391
 392 void
 393 netifd_ubus_interface_event(struct interface *iface, bool up)
 394 {
 395         blob_buf_init(&b, 0);
 396         blobmsg_add_string(&b, "action", up ? "ifup" : "ifdown");
 397         blobmsg_add_string(&b, "interface", iface->name);
 398         ubus_send_event(ctx, "network.interface", b.head);
 399 }
 400
 401 void
 402 netifd_ubus_add_interface(struct interface *iface)
 403 {
 404         struct ubus_object *obj = &iface->ubus;
 405         char *name = NULL;
 406
 407         asprintf(&name, "%s.interface.%s", main_object.name, iface->name);
 408         if (!name)
 409                 return;
 410
 411         obj->name = name;
 412         obj->type = &iface_object_type;
 413         obj->methods = iface_object_methods;
 414         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 415         if (ubus_add_object(ctx, &iface->ubus)) {
 416                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 417                 free(name);
 418                 obj->name = NULL;
 419         }
 420 }
 421
 422 void
 423 netifd_ubus_remove_interface(struct interface *iface)
 424 {
 425         if (!iface->ubus.name)
 426                 return;
 427
 428         ubus_remove_object(ctx, &iface->ubus);
 429         free((void *) iface->ubus.name);
 430 }