ubus.c

   1 #include <string.h>
   2
   3 #include "netifd.h"
   4 #include "interface.h"
   5 #include "proto.h"
   6 #include "ubus.h"
   7 #include "system.h"
   8
   9 static struct ubus_context *ctx = NULL;
  10 static struct blob_buf b;
  11
  12 /* global object */
  13
  14 enum {
  15         DEV_NAME,
  16         DEV_FORCE,
  17         __DEV_MAX,
  18         __DEV_MAX_NOFORCE = __DEV_MAX - 1,
  19 };
  20
  21 static const struct blobmsg_policy dev_policy[__DEV_MAX] = {
  22         [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
  23         [DEV_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_INT8 },
  24 };
  25
  26 static int
  27 netifd_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
  28                      struct ubus_request_data *req, const char *method,
  29                      struct blob_attr *msg)
  30 {
  31         struct device *dev;
  32         struct blob_attr *tb[__DEV_MAX];
  33         bool add = !strncmp(method, "add", 3);
  34
  35         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
  36
  37         if (!tb[DEV_NAME])
  38                 return UBUS_STATUS_INVALID_ARGUMENT;
  39
  40         dev = device_get(blobmsg_data(tb[DEV_NAME]), false);
  41         if (!dev)
  42                 return UBUS_STATUS_NOT_FOUND;
  43
  44         if (!add || (tb[DEV_FORCE] && blobmsg_get_u8(tb[DEV_FORCE])))
  45                 device_set_present(dev, add);
  46         else
  47                 device_check_state(dev);
  48
  49         return 0;
  50 }
  51
  52 static int
  53 netifd_handle_restart(struct ubus_context *ctx, struct ubus_object *obj,
  54                       struct ubus_request_data *req, const char *method,
  55                       struct blob_attr *msg)
  56 {
  57         netifd_restart();
  58         return 0;
  59 }
  60
  61 static int
  62 netifd_handle_reload(struct ubus_context *ctx, struct ubus_object *obj,
  63                       struct ubus_request_data *req, const char *method,
  64                       struct blob_attr *msg)
  65 {
  66         netifd_reload();
  67         return 0;
  68 }
  69
  70 static struct ubus_method main_object_methods[] = {
  71         UBUS_METHOD("add_device", netifd_handle_device, dev_policy),
  72         UBUS_METHOD("remove_device", netifd_handle_device, dev_policy),
  73         { .name = "restart", .handler = netifd_handle_restart },
  74         { .name = "reload", .handler = netifd_handle_reload },
  75 };
  76
  77 static struct ubus_object_type main_object_type =
  78         UBUS_OBJECT_TYPE("netifd", main_object_methods);
  79
  80 static struct ubus_object main_object = {
  81         .name = "network",
  82         .type = &main_object_type,
  83         .methods = main_object_methods,
  84         .n_methods = ARRAY_SIZE(main_object_methods),
  85 };
  86
  87 int
  88 netifd_ubus_init(const char *path)
  89 {
  90         int ret;
  91
  92         ctx = ubus_connect(path);
  93         if (!ctx)
  94                 return -EIO;
  95
  96         DPRINTF("connected as %08x\n", ctx->local_id);
  97         uloop_init();
  98         ubus_add_uloop(ctx);
  99
 100         ret = ubus_add_object(ctx, &main_object);
 101         if (ret != 0)
 102                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
 103
 104         return 0;
 105 }
 106
 107 void
 108 netifd_ubus_done(void)
 109 {
 110         ubus_free(ctx);
 111 }
 112
 113
 114 /* per-interface object */
 115
 116 static int
 117 netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
 118                  struct ubus_request_data *req, const char *method,
 119                  struct blob_attr *msg)
 120 {
 121         struct interface *iface;
 122
 123         iface = container_of(obj, struct interface, ubus);
 124         interface_set_up(iface);
 125
 126         return 0;
 127 }
 128
 129 static int
 130 netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 131                    struct ubus_request_data *req, const char *method,
 132                    struct blob_attr *msg)
 133 {
 134         struct interface *iface;
 135
 136         iface = container_of(obj, struct interface, ubus);
 137         interface_set_down(iface);
 138
 139         return 0;
 140 }
 141
 142 static void
 143 netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 144 {
 145         struct interface_error *error;
 146         void *e, *e2, *e3;
 147         int i;
 148
 149         e = blobmsg_open_array(b, "errors");
 150         list_for_each_entry(error, &iface->errors, list) {
 151                 e2 = blobmsg_open_table(b, NULL);
 152
 153                 blobmsg_add_string(b, "subsystem", error->subsystem);
 154                 blobmsg_add_string(b, "code", error->code);
 155                 if (error->data[0]) {
 156                         e3 = blobmsg_open_array(b, "data");
 157                         for (i = 0; error->data[i]; i++)
 158                                 blobmsg_add_string(b, NULL, error->data[i]);
 159                         blobmsg_close_array(b, e3);
 160                 }
 161
 162                 blobmsg_close_table(b, e2);
 163         }
 164         blobmsg_close_array(b, e);
 165 }
 166
 167 static int
 168 netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 169                      struct ubus_request_data *req, const char *method,
 170                      struct blob_attr *msg)
 171 {
 172         struct interface *iface;
 173
 174         iface = container_of(obj, struct interface, ubus);
 175
 176         blob_buf_init(&b, 0);
 177         blobmsg_add_u8(&b, "up", iface->state == IFS_UP);
 178         blobmsg_add_u8(&b, "pending", iface->state == IFS_SETUP);
 179         blobmsg_add_u8(&b, "available", iface->available);
 180         blobmsg_add_u8(&b, "autostart", iface->autostart);
 181
 182         if (iface->state == IFS_UP) {
 183                 time_t cur = system_get_rtime();
 184                 blobmsg_add_u32(&b, "uptime", cur - iface->start_time);
 185         }
 186
 187         if (iface->main_dev.dev) {
 188                 struct device *dev = iface->main_dev.dev;
 189                 const char *field;
 190                 void *devinfo;
 191
 192                 /* use a different field for virtual devices */
 193                 if (dev->avl.key)
 194                         field = "device";
 195                 else
 196                         field = "link";
 197
 198                 devinfo = blobmsg_open_table(&b, field);
 199                 blobmsg_add_string(&b, "name", dev->ifname);
 200
 201                 if (dev->type->dump_status)
 202                         dev->type->dump_status(dev, &b);
 203
 204                 blobmsg_close_table(&b, devinfo);
 205         }
 206
 207         if (!list_is_empty(&iface->errors))
 208                 netifd_add_interface_errors(&b, iface);
 209
 210         ubus_send_reply(ctx, req, b.head);
 211
 212         return 0;
 213 }
 214
 215 static int
 216 netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
 217                            struct ubus_request_data *req, const char *method,
 218                            struct blob_attr *msg)
 219 {
 220         struct interface *iface;
 221         struct device *dev, *main_dev;
 222         struct blob_attr *tb[__DEV_MAX];
 223         bool add = !strncmp(method, "add", 3);
 224         int ret;
 225
 226         iface = container_of(obj, struct interface, ubus);
 227
 228         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 229
 230         if (!tb[DEV_NAME])
 231                 return UBUS_STATUS_INVALID_ARGUMENT;
 232
 233         main_dev = iface->main_dev.dev;
 234         if (!main_dev)
 235                 return UBUS_STATUS_NOT_FOUND;
 236
 237         if (!main_dev->hotplug_ops)
 238                 return UBUS_STATUS_NOT_SUPPORTED;
 239
 240         dev = device_get(blobmsg_data(tb[DEV_NAME]), add);
 241         if (!dev)
 242                 return UBUS_STATUS_NOT_FOUND;
 243
 244         if (main_dev != dev) {
 245                 if (add)
 246                         ret = main_dev->hotplug_ops->add(main_dev, dev);
 247                 else
 248                         ret = main_dev->hotplug_ops->del(main_dev, dev);
 249                 if (ret)
 250                         ret = UBUS_STATUS_UNKNOWN_ERROR;
 251         } else {
 252                 ret = UBUS_STATUS_INVALID_ARGUMENT;
 253         }
 254
 255         if (add)
 256                 device_free_unused(dev);
 257
 258         return ret;
 259 }
 260
 261
 262 static int
 263 netifd_iface_notify_proto(struct ubus_context *ctx, struct ubus_object *obj,
 264                           struct ubus_request_data *req, const char *method,
 265                           struct blob_attr *msg)
 266 {
 267         struct interface *iface;
 268
 269         iface = container_of(obj, struct interface, ubus);
 270
 271         if (!iface->proto || !iface->proto->notify)
 272                 return UBUS_STATUS_NOT_SUPPORTED;
 273
 274         return iface->proto->notify(iface->proto, msg);
 275 }
 276
 277 static void
 278 netifd_iface_do_remove(struct uloop_timeout *timeout)
 279 {
 280         struct interface *iface;
 281
 282         iface = container_of(timeout, struct interface, remove_timer);
 283         vlist_delete(&interfaces, &iface->node);
 284 }
 285
 286 static int
 287 netifd_iface_remove(struct ubus_context *ctx, struct ubus_object *obj,
 288                     struct ubus_request_data *req, const char *method,
 289                     struct blob_attr *msg)
 290 {
 291         struct interface *iface;
 292
 293         iface = container_of(obj, struct interface, ubus);
 294         if (iface->remove_timer.cb)
 295                 return UBUS_STATUS_INVALID_ARGUMENT;
 296
 297         iface->remove_timer.cb = netifd_iface_do_remove;
 298         uloop_timeout_set(&iface->remove_timer, 100);
 299         return 0;
 300 }
 301
 302 static struct ubus_method iface_object_methods[] = {
 303         { .name = "up", .handler = netifd_handle_up },
 304         { .name = "down", .handler = netifd_handle_down },
 305         { .name = "status", .handler = netifd_handle_status },
 306         { .name = "add_device", .handler = netifd_iface_handle_device,
 307           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 308         { .name = "remove_device", .handler = netifd_iface_handle_device,
 309           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 310         { .name = "notify_proto", .handler = netifd_iface_notify_proto },
 311         { .name = "remove", .handler = netifd_iface_remove }
 312 };
 313
 314 static struct ubus_object_type iface_object_type =
 315         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 316
 317
 318 void
 319 netifd_ubus_interface_event(struct interface *iface, bool up)
 320 {
 321         blob_buf_init(&b, 0);
 322         blobmsg_add_string(&b, "action", up ? "ifup" : "ifdown");
 323         blobmsg_add_string(&b, "interface", iface->name);
 324         ubus_send_event(ctx, "network.interface", b.head);
 325 }
 326
 327 void
 328 netifd_ubus_add_interface(struct interface *iface)
 329 {
 330         struct ubus_object *obj = &iface->ubus;
 331         char *name;
 332
 333         name = malloc(strlen(main_object.name) + strlen(iface->name) + 2);
 334         if (!name)
 335                 return;
 336
 337         sprintf(name, "%s.%s", main_object.name, iface->name);
 338         obj->name = name;
 339         obj->type = &iface_object_type;
 340         obj->methods = iface_object_methods;
 341         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 342         if (ubus_add_object(ctx, &iface->ubus)) {
 343                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 344                 free(name);
 345                 obj->name = NULL;
 346         }
 347 }
 348
 349 void
 350 netifd_ubus_remove_interface(struct interface *iface)
 351 {
 352         if (!iface->ubus.name)
 353                 return;
 354
 355         ubus_remove_object(ctx, &iface->ubus);
 356         free((void *) iface->ubus.name);
 357 }