ubus.c

   1 #include <string.h>
   2
   3 #include "netifd.h"
   4 #include "interface.h"
   5 #include "ubus.h"
   6
   7 static struct ubus_context *ctx = NULL;
   8 static struct blob_buf b;
   9
  10 /* global object */
  11
  12 enum {
  13         DEV_NAME,
  14         DEV_FORCE,
  15         __DEV_MAX,
  16         __DEV_MAX_NOFORCE = __DEV_MAX - 1,
  17 };
  18
  19 static const struct blobmsg_policy dev_policy[__DEV_MAX] = {
  20         [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
  21         [DEV_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_INT8 },
  22 };
  23
  24 static int
  25 netifd_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
  26                      struct ubus_request_data *req, const char *method,
  27                      struct blob_attr *msg)
  28 {
  29         struct device *dev;
  30         struct blob_attr *tb[__DEV_MAX];
  31         bool add = !strncmp(method, "add", 3);
  32
  33         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
  34
  35         if (!tb[DEV_NAME])
  36                 return UBUS_STATUS_INVALID_ARGUMENT;
  37
  38         dev = device_get(blobmsg_data(tb[DEV_NAME]), false);
  39         if (!dev)
  40                 return UBUS_STATUS_NOT_FOUND;
  41
  42         if (!add || (tb[DEV_FORCE] && blobmsg_get_u8(tb[DEV_FORCE])))
  43                 device_set_present(dev, add);
  44         else
  45                 check_device_state(dev);
  46
  47         return 0;
  48 }
  49
  50 static struct ubus_method main_object_methods[] = {
  51         UBUS_METHOD("add_device", netifd_handle_device, dev_policy),
  52         UBUS_METHOD("remove_device", netifd_handle_device, dev_policy),
  53 };
  54
  55 static struct ubus_object_type main_object_type =
  56         UBUS_OBJECT_TYPE("netifd", main_object_methods);
  57
  58 static struct ubus_object main_object = {
  59         .name = "network.interface",
  60         .type = &main_object_type,
  61         .methods = main_object_methods,
  62         .n_methods = ARRAY_SIZE(main_object_methods),
  63 };
  64
  65 int
  66 netifd_ubus_init(const char *path)
  67 {
  68         int ret;
  69
  70         ctx = ubus_connect(path);
  71         if (!ctx)
  72                 return -EIO;
  73
  74         DPRINTF("connected as %08x\n", ctx->local_id);
  75         uloop_init();
  76         ubus_add_uloop(ctx);
  77
  78         ret = ubus_add_object(ctx, &main_object);
  79         if (ret != 0)
  80                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
  81
  82         return 0;
  83 }
  84
  85 void
  86 netifd_ubus_done(void)
  87 {
  88         ubus_free(ctx);
  89 }
  90
  91
  92 /* per-interface object */
  93
  94 static int
  95 netifd_handle_up(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 interface *iface;
 100
 101         iface = container_of(obj, struct interface, ubus);
 102         interface_set_up(iface);
 103
 104         return 0;
 105 }
 106
 107 static int
 108 netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 109                    struct ubus_request_data *req, const char *method,
 110                    struct blob_attr *msg)
 111 {
 112         struct interface *iface;
 113
 114         iface = container_of(obj, struct interface, ubus);
 115         interface_set_down(iface);
 116
 117         return 0;
 118 }
 119
 120 static void
 121 netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 122 {
 123         struct interface_error *error;
 124         void *e, *e2, *e3;
 125         int i;
 126
 127         e = blobmsg_open_array(b, "errors");
 128         list_for_each_entry(error, &iface->errors, list) {
 129                 e2 = blobmsg_open_table(b, NULL);
 130
 131                 blobmsg_add_string(b, "subsystem", error->subsystem);
 132                 blobmsg_add_string(b, "code", error->code);
 133                 if (error->data[0]) {
 134                         e3 = blobmsg_open_array(b, "data");
 135                         for (i = 0; error->data[i]; i++)
 136                                 blobmsg_add_string(b, NULL, error->data[i]);
 137                         blobmsg_close_array(b, e3);
 138                 }
 139
 140                 blobmsg_close_table(b, e2);
 141         }
 142         blobmsg_close_array(b, e);
 143 }
 144
 145 static int
 146 netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 147                      struct ubus_request_data *req, const char *method,
 148                      struct blob_attr *msg)
 149 {
 150         struct interface *iface;
 151
 152         iface = container_of(obj, struct interface, ubus);
 153
 154         blob_buf_init(&b, 0);
 155         blobmsg_add_u8(&b, "up", iface->state == IFS_UP);
 156         blobmsg_add_u8(&b, "pending", iface->state == IFS_SETUP);
 157         blobmsg_add_u8(&b, "active", iface->active);
 158         blobmsg_add_u8(&b, "autostart", iface->autostart);
 159         if (iface->main_dev.dev) {
 160                 struct device *dev = iface->main_dev.dev;
 161                 const char *field;
 162                 void *devinfo;
 163
 164                 /* use a different field for virtual devices */
 165                 if (dev->avl.key)
 166                         field = "device";
 167                 else
 168                         field = "link";
 169
 170                 devinfo = blobmsg_open_table(&b, field);
 171                 blobmsg_add_string(&b, "name", dev->ifname);
 172
 173                 if (dev->type->dump_status)
 174                         dev->type->dump_status(dev, &b);
 175
 176                 blobmsg_close_table(&b, devinfo);
 177         }
 178
 179         if (!list_is_empty(&iface->errors))
 180                 netifd_add_interface_errors(&b, iface);
 181
 182         ubus_send_reply(ctx, req, b.head);
 183
 184         return 0;
 185 }
 186
 187 static int
 188 netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
 189                            struct ubus_request_data *req, const char *method,
 190                            struct blob_attr *msg)
 191 {
 192         struct interface *iface;
 193         struct device *dev, *main_dev;
 194         struct blob_attr *tb[__DEV_MAX];
 195         bool add = !strncmp(method, "add", 3);
 196         int ret;
 197
 198         iface = container_of(obj, struct interface, ubus);
 199
 200         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 201
 202         if (!tb[DEV_NAME])
 203                 return UBUS_STATUS_INVALID_ARGUMENT;
 204
 205         main_dev = iface->main_dev.dev;
 206         if (!main_dev)
 207                 return UBUS_STATUS_NOT_FOUND;
 208
 209         if (!main_dev->hotplug_ops)
 210                 return UBUS_STATUS_NOT_SUPPORTED;
 211
 212         dev = device_get(blobmsg_data(tb[DEV_NAME]), add);
 213         if (!dev)
 214                 return UBUS_STATUS_NOT_FOUND;
 215
 216         if (main_dev != dev) {
 217                 if (add)
 218                         ret = main_dev->hotplug_ops->add(main_dev, dev);
 219                 else
 220                         ret = main_dev->hotplug_ops->del(main_dev, dev);
 221                 if (ret)
 222                         ret = UBUS_STATUS_UNKNOWN_ERROR;
 223         } else {
 224                 ret = UBUS_STATUS_INVALID_ARGUMENT;
 225         }
 226
 227         if (add)
 228                 device_free_unused(dev);
 229
 230         return ret;
 231 }
 232
 233
 234 static struct ubus_method iface_object_methods[] = {
 235         { .name = "up", .handler = netifd_handle_up },
 236         { .name = "down", .handler = netifd_handle_down },
 237         { .name = "status", .handler = netifd_handle_status },
 238         { .name = "add_device", .handler = netifd_iface_handle_device,
 239           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 240         { .name = "remove_device", .handler = netifd_iface_handle_device,
 241           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 242 };
 243
 244 static struct ubus_object_type iface_object_type =
 245         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 246
 247
 248 void
 249 netifd_ubus_add_interface(struct interface *iface)
 250 {
 251         struct ubus_object *obj = &iface->ubus;
 252         char *name;
 253
 254         name = malloc(strlen(main_object.name) + strlen(iface->name) + 2);
 255         if (!name)
 256                 return;
 257
 258         sprintf(name, "%s.%s", main_object.name, iface->name);
 259         obj->name = name;
 260         obj->type = &iface_object_type;
 261         obj->methods = iface_object_methods;
 262         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 263         if (ubus_add_object(ctx, &iface->ubus)) {
 264                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 265                 free(name);
 266                 obj->name = NULL;
 267         }
 268 }
 269
 270 void
 271 netifd_ubus_remove_interface(struct interface *iface)
 272 {
 273         if (!iface->ubus.name)
 274                 return;
 275
 276         ubus_remove_object(ctx, &iface->ubus);
 277         free((void *) iface->ubus.name);
 278 }