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 int
  51 netifd_handle_restart(struct ubus_context *ctx, struct ubus_object *obj,
  52                       struct ubus_request_data *req, const char *method,
  53                       struct blob_attr *msg)
  54 {
  55         netifd_restart();
  56         return 0;
  57 }
  58
  59 static struct ubus_method main_object_methods[] = {
  60         UBUS_METHOD("add_device", netifd_handle_device, dev_policy),
  61         UBUS_METHOD("remove_device", netifd_handle_device, dev_policy),
  62         { .name = "restart", .handler = netifd_handle_restart },
  63 };
  64
  65 static struct ubus_object_type main_object_type =
  66         UBUS_OBJECT_TYPE("netifd", main_object_methods);
  67
  68 static struct ubus_object main_object = {
  69         .name = "network.interface",
  70         .type = &main_object_type,
  71         .methods = main_object_methods,
  72         .n_methods = ARRAY_SIZE(main_object_methods),
  73 };
  74
  75 int
  76 netifd_ubus_init(const char *path)
  77 {
  78         int ret;
  79
  80         ctx = ubus_connect(path);
  81         if (!ctx)
  82                 return -EIO;
  83
  84         DPRINTF("connected as %08x\n", ctx->local_id);
  85         uloop_init();
  86         ubus_add_uloop(ctx);
  87
  88         ret = ubus_add_object(ctx, &main_object);
  89         if (ret != 0)
  90                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
  91
  92         return 0;
  93 }
  94
  95 void
  96 netifd_ubus_done(void)
  97 {
  98         ubus_free(ctx);
  99 }
 100
 101
 102 /* per-interface object */
 103
 104 static int
 105 netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
 106                  struct ubus_request_data *req, const char *method,
 107                  struct blob_attr *msg)
 108 {
 109         struct interface *iface;
 110
 111         iface = container_of(obj, struct interface, ubus);
 112         interface_set_up(iface);
 113
 114         return 0;
 115 }
 116
 117 static int
 118 netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 119                    struct ubus_request_data *req, const char *method,
 120                    struct blob_attr *msg)
 121 {
 122         struct interface *iface;
 123
 124         iface = container_of(obj, struct interface, ubus);
 125         interface_set_down(iface);
 126
 127         return 0;
 128 }
 129
 130 static void
 131 netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 132 {
 133         struct interface_error *error;
 134         void *e, *e2, *e3;
 135         int i;
 136
 137         e = blobmsg_open_array(b, "errors");
 138         list_for_each_entry(error, &iface->errors, list) {
 139                 e2 = blobmsg_open_table(b, NULL);
 140
 141                 blobmsg_add_string(b, "subsystem", error->subsystem);
 142                 blobmsg_add_string(b, "code", error->code);
 143                 if (error->data[0]) {
 144                         e3 = blobmsg_open_array(b, "data");
 145                         for (i = 0; error->data[i]; i++)
 146                                 blobmsg_add_string(b, NULL, error->data[i]);
 147                         blobmsg_close_array(b, e3);
 148                 }
 149
 150                 blobmsg_close_table(b, e2);
 151         }
 152         blobmsg_close_array(b, e);
 153 }
 154
 155 static int
 156 netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 157                      struct ubus_request_data *req, const char *method,
 158                      struct blob_attr *msg)
 159 {
 160         struct interface *iface;
 161
 162         iface = container_of(obj, struct interface, ubus);
 163
 164         blob_buf_init(&b, 0);
 165         blobmsg_add_u8(&b, "up", iface->state == IFS_UP);
 166         blobmsg_add_u8(&b, "pending", iface->state == IFS_SETUP);
 167         blobmsg_add_u8(&b, "available", iface->available);
 168         blobmsg_add_u8(&b, "autostart", iface->autostart);
 169         if (iface->main_dev.dev) {
 170                 struct device *dev = iface->main_dev.dev;
 171                 const char *field;
 172                 void *devinfo;
 173
 174                 /* use a different field for virtual devices */
 175                 if (dev->avl.key)
 176                         field = "device";
 177                 else
 178                         field = "link";
 179
 180                 devinfo = blobmsg_open_table(&b, field);
 181                 blobmsg_add_string(&b, "name", dev->ifname);
 182
 183                 if (dev->type->dump_status)
 184                         dev->type->dump_status(dev, &b);
 185
 186                 blobmsg_close_table(&b, devinfo);
 187         }
 188
 189         if (!list_is_empty(&iface->errors))
 190                 netifd_add_interface_errors(&b, iface);
 191
 192         ubus_send_reply(ctx, req, b.head);
 193
 194         return 0;
 195 }
 196
 197 static int
 198 netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
 199                            struct ubus_request_data *req, const char *method,
 200                            struct blob_attr *msg)
 201 {
 202         struct interface *iface;
 203         struct device *dev, *main_dev;
 204         struct blob_attr *tb[__DEV_MAX];
 205         bool add = !strncmp(method, "add", 3);
 206         int ret;
 207
 208         iface = container_of(obj, struct interface, ubus);
 209
 210         blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));
 211
 212         if (!tb[DEV_NAME])
 213                 return UBUS_STATUS_INVALID_ARGUMENT;
 214
 215         main_dev = iface->main_dev.dev;
 216         if (!main_dev)
 217                 return UBUS_STATUS_NOT_FOUND;
 218
 219         if (!main_dev->hotplug_ops)
 220                 return UBUS_STATUS_NOT_SUPPORTED;
 221
 222         dev = device_get(blobmsg_data(tb[DEV_NAME]), add);
 223         if (!dev)
 224                 return UBUS_STATUS_NOT_FOUND;
 225
 226         if (main_dev != dev) {
 227                 if (add)
 228                         ret = main_dev->hotplug_ops->add(main_dev, dev);
 229                 else
 230                         ret = main_dev->hotplug_ops->del(main_dev, dev);
 231                 if (ret)
 232                         ret = UBUS_STATUS_UNKNOWN_ERROR;
 233         } else {
 234                 ret = UBUS_STATUS_INVALID_ARGUMENT;
 235         }
 236
 237         if (add)
 238                 device_free_unused(dev);
 239
 240         return ret;
 241 }
 242
 243
 244 static struct ubus_method iface_object_methods[] = {
 245         { .name = "up", .handler = netifd_handle_up },
 246         { .name = "down", .handler = netifd_handle_down },
 247         { .name = "status", .handler = netifd_handle_status },
 248         { .name = "add_device", .handler = netifd_iface_handle_device,
 249           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 250         { .name = "remove_device", .handler = netifd_iface_handle_device,
 251           .policy = dev_policy, .n_policy = __DEV_MAX_NOFORCE },
 252 };
 253
 254 static struct ubus_object_type iface_object_type =
 255         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 256
 257
 258 void
 259 netifd_ubus_add_interface(struct interface *iface)
 260 {
 261         struct ubus_object *obj = &iface->ubus;
 262         char *name;
 263
 264         name = malloc(strlen(main_object.name) + strlen(iface->name) + 2);
 265         if (!name)
 266                 return;
 267
 268         sprintf(name, "%s.%s", main_object.name, iface->name);
 269         obj->name = name;
 270         obj->type = &iface_object_type;
 271         obj->methods = iface_object_methods;
 272         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 273         if (ubus_add_object(ctx, &iface->ubus)) {
 274                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 275                 free(name);
 276                 obj->name = NULL;
 277         }
 278 }
 279
 280 void
 281 netifd_ubus_remove_interface(struct interface *iface)
 282 {
 283         if (!iface->ubus.name)
 284                 return;
 285
 286         ubus_remove_object(ctx, &iface->ubus);
 287         free((void *) iface->ubus.name);
 288 }