ubus.c

   1 #include <string.h>
   2
   3 #include "netifd.h"
   4 #include "ubus.h"
   5
   6 static struct ubus_context *ctx = NULL;
   7 static struct blob_buf b;
   8
   9 /* global object */
  10
  11 enum {
  12         DEV_NAME,
  13         DEV_FORCE,
  14         DEV_LAST,
  15 };
  16
  17 static const struct blobmsg_policy dev_policy[] = {
  18         [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
  19         [DEV_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_INT8 },
  20 };
  21
  22 static int netifd_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
  23                                 struct ubus_request_data *req, const char *method,
  24                                 struct blob_attr *msg)
  25 {
  26         struct device *dev;
  27         struct blob_attr *tb[DEV_LAST];
  28         bool add = !strncmp(method, "add", 3);
  29
  30         blobmsg_parse(dev_policy, ARRAY_SIZE(dev_policy), tb, blob_data(msg), blob_len(msg));
  31
  32         if (!tb[DEV_NAME])
  33                 return UBUS_STATUS_INVALID_ARGUMENT;
  34
  35         dev = get_device(blobmsg_data(tb[DEV_NAME]), false);
  36         if (!dev)
  37                 return UBUS_STATUS_NOT_FOUND;
  38
  39         if (!add || (tb[DEV_FORCE] && blobmsg_get_u8(tb[DEV_FORCE])))
  40                 set_device_present(dev, add);
  41         else
  42                 check_device_state(dev);
  43
  44         return 0;
  45 }
  46
  47 static struct ubus_method main_object_methods[] = {
  48         UBUS_METHOD("add_device", netifd_handle_device, dev_policy),
  49         UBUS_METHOD("del_device", netifd_handle_device, dev_policy),
  50 };
  51
  52 static struct ubus_object_type main_object_type =
  53         UBUS_OBJECT_TYPE("netifd", main_object_methods);
  54
  55 static struct ubus_object main_object = {
  56         .name = "network.interface",
  57         .type = &main_object_type,
  58         .methods = main_object_methods,
  59         .n_methods = ARRAY_SIZE(main_object_methods),
  60 };
  61
  62 int netifd_ubus_init(const char *path)
  63 {
  64         int ret;
  65
  66         ctx = ubus_connect(path);
  67         if (!ctx)
  68                 return -EIO;
  69
  70         DPRINTF("connected as %08x\n", ctx->local_id);
  71         uloop_init();
  72         ubus_add_uloop(ctx);
  73
  74         ret = ubus_add_object(ctx, &main_object);
  75         if (ret != 0)
  76                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
  77
  78         return 0;
  79 }
  80
  81 void netifd_ubus_done(void)
  82 {
  83         ubus_free(ctx);
  84 }
  85
  86
  87 /* per-interface object */
  88
  89 static int netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
  90                             struct ubus_request_data *req, const char *method,
  91                             struct blob_attr *msg)
  92 {
  93         struct interface *iface;
  94
  95         iface = container_of(obj, struct interface, ubus);
  96         set_interface_up(iface);
  97
  98         return 0;
  99 }
 100
 101 static int netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 102                               struct ubus_request_data *req, const char *method,
 103                               struct blob_attr *msg)
 104 {
 105         struct interface *iface;
 106
 107         iface = container_of(obj, struct interface, ubus);
 108         set_interface_down(iface);
 109
 110         return 0;
 111 }
 112
 113 static void netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 114 {
 115         struct interface_error *error;
 116         void *e, *e2, *e3;
 117         int i;
 118
 119         e = blobmsg_open_array(b, "errors");
 120         list_for_each_entry(error, &iface->errors, list) {
 121                 e2 = blobmsg_open_table(b, NULL);
 122
 123                 blobmsg_add_string(b, "subsystem", error->subsystem);
 124                 blobmsg_add_string(b, "code", error->code);
 125                 if (error->data[0]) {
 126                         e3 = blobmsg_open_array(b, "data");
 127                         for (i = 0; error->data[i]; i++)
 128                                 blobmsg_add_string(b, NULL, error->data[i]);
 129                         blobmsg_close_array(b, e3);
 130                 }
 131
 132                 blobmsg_close_table(b, e2);
 133         }
 134         blobmsg_close_array(b, e);
 135 }
 136
 137 static int netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 138                                 struct ubus_request_data *req, const char *method,
 139                                 struct blob_attr *msg)
 140 {
 141         static const char *iface_state[] = {
 142                 [IFS_SETUP] = "setup",
 143                 [IFS_UP] = "up",
 144                 [IFS_TEARDOWN] = "teardown",
 145                 [IFS_DOWN] = "down",
 146         };
 147         struct interface *iface;
 148
 149         iface = container_of(obj, struct interface, ubus);
 150
 151         blob_buf_init(&b, 0);
 152         blobmsg_add_string(&b, "state", iface_state[iface->state]);
 153         blobmsg_add_u8(&b, "active", iface->active);
 154         blobmsg_add_u8(&b, "autostart", iface->autostart);
 155         if (iface->main_dev.dev) {
 156                 struct device *dev = iface->main_dev.dev;
 157                 const char *field;
 158                 void *devinfo;
 159
 160                 /* use a different field for virtual devices */
 161                 if (dev->avl.key)
 162                         field = "device";
 163                 else
 164                         field = "link";
 165
 166                 devinfo = blobmsg_open_table(&b, field);
 167                 blobmsg_add_string(&b, "name", dev->ifname);
 168
 169                 if (dev->type->dump_status)
 170                         dev->type->dump_status(dev, &b);
 171
 172                 blobmsg_close_table(&b, devinfo);
 173         }
 174
 175         if (!list_is_empty(&iface->errors))
 176                 netifd_add_interface_errors(&b, iface);
 177
 178         ubus_send_reply(ctx, req, b.head);
 179
 180         return 0;
 181 }
 182
 183
 184 static struct ubus_method iface_object_methods[] = {
 185         { .name = "up", .handler = netifd_handle_up },
 186         { .name = "down", .handler = netifd_handle_down },
 187         { .name = "status", .handler = netifd_handle_status },
 188 };
 189
 190 static struct ubus_object_type iface_object_type =
 191         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 192
 193
 194 void netifd_ubus_add_interface(struct interface *iface)
 195 {
 196         struct ubus_object *obj = &iface->ubus;
 197         char *name;
 198
 199         name = malloc(strlen(main_object.name) + strlen(iface->name) + 2);
 200         if (!name)
 201                 return;
 202
 203         sprintf(name, "%s.%s", main_object.name, iface->name);
 204         obj->name = name;
 205         obj->type = &iface_object_type;
 206         obj->methods = iface_object_methods;
 207         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 208         if (ubus_add_object(ctx, &iface->ubus)) {
 209                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 210                 free(name);
 211                 obj->name = NULL;
 212         }
 213 }
 214
 215 void netifd_ubus_remove_interface(struct interface *iface)
 216 {
 217         if (!iface->ubus.name)
 218                 return;
 219
 220         ubus_remove_object(ctx, &iface->ubus);
 221         free((void *) iface->ubus.name);
 222 }