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         static const char *iface_state[] = {
 151                 [IFS_SETUP] = "setup",
 152                 [IFS_UP] = "up",
 153                 [IFS_TEARDOWN] = "teardown",
 154                 [IFS_DOWN] = "down",
 155         };
 156         struct interface *iface;
 157
 158         iface = container_of(obj, struct interface, ubus);
 159
 160         blob_buf_init(&b, 0);
 161         blobmsg_add_string(&b, "state", iface_state[iface->state]);
 162         blobmsg_add_u8(&b, "active", iface->active);
 163         blobmsg_add_u8(&b, "autostart", iface->autostart);
 164         if (iface->main_dev.dev) {
 165                 struct device *dev = iface->main_dev.dev;
 166                 const char *field;
 167                 void *devinfo;
 168
 169                 /* use a different field for virtual devices */
 170                 if (dev->avl.key)
 171                         field = "device";
 172                 else
 173                         field = "link";
 174
 175                 devinfo = blobmsg_open_table(&b, field);
 176                 blobmsg_add_string(&b, "name", dev->ifname);
 177
 178                 if (dev->type->dump_status)
 179                         dev->type->dump_status(dev, &b);
 180
 181                 blobmsg_close_table(&b, devinfo);
 182         }
 183
 184         if (!list_is_empty(&iface->errors))
 185                 netifd_add_interface_errors(&b, iface);
 186
 187         ubus_send_reply(ctx, req, b.head);
 188
 189         return 0;
 190 }
 191
 192 static int
 193 netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
 194                            struct ubus_request_data *req, const char *method,
 195                            struct blob_attr *msg)
 196 {
 197         struct interface *iface;
 198         struct device *dev, *main_dev;
 199         struct blob_attr *tb[__DEV_MAX];
 200         bool add = !strncmp(method, "add", 3);
 201         int ret;
 202
 203         iface = container_of(obj, struct interface, ubus);
 204
 205         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 206
 207         if (!tb[DEV_NAME])
 208                 return UBUS_STATUS_INVALID_ARGUMENT;
 209
 210         main_dev = iface->main_dev.dev;
 211         if (!main_dev)
 212                 return UBUS_STATUS_NOT_FOUND;
 213
 214         if (!main_dev->hotplug_ops)
 215                 return UBUS_STATUS_NOT_SUPPORTED;
 216
 217         dev = device_get(blobmsg_data(tb[DEV_NAME]), add);
 218         if (!dev)
 219                 return UBUS_STATUS_NOT_FOUND;
 220
 221         if (main_dev != dev) {
 222                 if (add)
 223                         ret = main_dev->hotplug_ops->add(main_dev, dev);
 224                 else
 225                         ret = main_dev->hotplug_ops->del(main_dev, dev);
 226                 if (ret)
 227                         ret = UBUS_STATUS_UNKNOWN_ERROR;
 228         } else {
 229                 ret = UBUS_STATUS_INVALID_ARGUMENT;
 230         }
 231
 232         if (add)
 233                 device_free_unused(dev);
 234
 235         return ret;
 236 }
 237
 238
 239 static struct ubus_method iface_object_methods[] = {
 240         { .name = "up", .handler = netifd_handle_up },
 241         { .name = "down", .handler = netifd_handle_down },
 242         { .name = "status", .handler = netifd_handle_status },
 243         { .name = "add_device", .handler = netifd_iface_handle_device,
 244           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 245         { .name = "remove_device", .handler = netifd_iface_handle_device,
 246           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 247 };
 248
 249 static struct ubus_object_type iface_object_type =
 250         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 251
 252
 253 void
 254 netifd_ubus_add_interface(struct interface *iface)
 255 {
 256         struct ubus_object *obj = &iface->ubus;
 257         char *name;
 258
 259         name = malloc(strlen(main_object.name) + strlen(iface->name) + 2);
 260         if (!name)
 261                 return;
 262
 263         sprintf(name, "%s.%s", main_object.name, iface->name);
 264         obj->name = name;
 265         obj->type = &iface_object_type;
 266         obj->methods = iface_object_methods;
 267         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 268         if (ubus_add_object(ctx, &iface->ubus)) {
 269                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 270                 free(name);
 271                 obj->name = NULL;
 272         }
 273 }
 274
 275 void
 276 netifd_ubus_remove_interface(struct interface *iface)
 277 {
 278         if (!iface->ubus.name)
 279                 return;
 280
 281         ubus_remove_object(ctx, &iface->ubus);
 282         free((void *) iface->ubus.name);
 283 }