ubus.c

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