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_LAST,
  16 };
  17
  18 static const struct blobmsg_policy dev_policy[] = {
  19         [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
  20         [DEV_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_INT8 },
  21 };
  22
  23 static int netifd_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
  24                                 struct ubus_request_data *req, const char *method,
  25                                 struct blob_attr *msg)
  26 {
  27         struct device *dev;
  28         struct blob_attr *tb[DEV_LAST];
  29         bool add = !strncmp(method, "add", 3);
  30
  31         blobmsg_parse(dev_policy, ARRAY_SIZE(dev_policy), tb, blob_data(msg), blob_len(msg));
  32
  33         if (!tb[DEV_NAME])
  34                 return UBUS_STATUS_INVALID_ARGUMENT;
  35
  36         dev = device_get(blobmsg_data(tb[DEV_NAME]), false);
  37         if (!dev)
  38                 return UBUS_STATUS_NOT_FOUND;
  39
  40         if (!add || (tb[DEV_FORCE] && blobmsg_get_u8(tb[DEV_FORCE])))
  41                 device_set_present(dev, add);
  42         else
  43                 check_device_state(dev);
  44
  45         return 0;
  46 }
  47
  48 static struct ubus_method main_object_methods[] = {
  49         UBUS_METHOD("add_device", netifd_handle_device, dev_policy),
  50         UBUS_METHOD("del_device", netifd_handle_device, dev_policy),
  51 };
  52
  53 static struct ubus_object_type main_object_type =
  54         UBUS_OBJECT_TYPE("netifd", main_object_methods);
  55
  56 static struct ubus_object main_object = {
  57         .name = "network.interface",
  58         .type = &main_object_type,
  59         .methods = main_object_methods,
  60         .n_methods = ARRAY_SIZE(main_object_methods),
  61 };
  62
  63 int netifd_ubus_init(const char *path)
  64 {
  65         int ret;
  66
  67         ctx = ubus_connect(path);
  68         if (!ctx)
  69                 return -EIO;
  70
  71         DPRINTF("connected as %08x\n", ctx->local_id);
  72         uloop_init();
  73         ubus_add_uloop(ctx);
  74
  75         ret = ubus_add_object(ctx, &main_object);
  76         if (ret != 0)
  77                 fprintf(stderr, "Failed to publish object: %s\n", ubus_strerror(ret));
  78
  79         return 0;
  80 }
  81
  82 void netifd_ubus_done(void)
  83 {
  84         ubus_free(ctx);
  85 }
  86
  87
  88 /* per-interface object */
  89
  90 static int netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
  91                             struct ubus_request_data *req, const char *method,
  92                             struct blob_attr *msg)
  93 {
  94         struct interface *iface;
  95
  96         iface = container_of(obj, struct interface, ubus);
  97         interface_set_up(iface);
  98
  99         return 0;
 100 }
 101
 102 static int netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
 103                               struct ubus_request_data *req, const char *method,
 104                               struct blob_attr *msg)
 105 {
 106         struct interface *iface;
 107
 108         iface = container_of(obj, struct interface, ubus);
 109         interface_set_down(iface);
 110
 111         return 0;
 112 }
 113
 114 static void netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
 115 {
 116         struct interface_error *error;
 117         void *e, *e2, *e3;
 118         int i;
 119
 120         e = blobmsg_open_array(b, "errors");
 121         list_for_each_entry(error, &iface->errors, list) {
 122                 e2 = blobmsg_open_table(b, NULL);
 123
 124                 blobmsg_add_string(b, "subsystem", error->subsystem);
 125                 blobmsg_add_string(b, "code", error->code);
 126                 if (error->data[0]) {
 127                         e3 = blobmsg_open_array(b, "data");
 128                         for (i = 0; error->data[i]; i++)
 129                                 blobmsg_add_string(b, NULL, error->data[i]);
 130                         blobmsg_close_array(b, e3);
 131                 }
 132
 133                 blobmsg_close_table(b, e2);
 134         }
 135         blobmsg_close_array(b, e);
 136 }
 137
 138 static int netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
 139                                 struct ubus_request_data *req, const char *method,
 140                                 struct blob_attr *msg)
 141 {
 142         static const char *iface_state[] = {
 143                 [IFS_SETUP] = "setup",
 144                 [IFS_UP] = "up",
 145                 [IFS_TEARDOWN] = "teardown",
 146                 [IFS_DOWN] = "down",
 147         };
 148         struct interface *iface;
 149
 150         iface = container_of(obj, struct interface, ubus);
 151
 152         blob_buf_init(&b, 0);
 153         blobmsg_add_string(&b, "state", iface_state[iface->state]);
 154         blobmsg_add_u8(&b, "active", iface->active);
 155         blobmsg_add_u8(&b, "autostart", iface->autostart);
 156         if (iface->main_dev.dev) {
 157                 struct device *dev = iface->main_dev.dev;
 158                 const char *field;
 159                 void *devinfo;
 160
 161                 /* use a different field for virtual devices */
 162                 if (dev->avl.key)
 163                         field = "device";
 164                 else
 165                         field = "link";
 166
 167                 devinfo = blobmsg_open_table(&b, field);
 168                 blobmsg_add_string(&b, "name", dev->ifname);
 169
 170                 if (dev->type->dump_status)
 171                         dev->type->dump_status(dev, &b);
 172
 173                 blobmsg_close_table(&b, devinfo);
 174         }
 175
 176         if (!list_is_empty(&iface->errors))
 177                 netifd_add_interface_errors(&b, iface);
 178
 179         ubus_send_reply(ctx, req, b.head);
 180
 181         return 0;
 182 }
 183
 184
 185 static struct ubus_method iface_object_methods[] = {
 186         { .name = "up", .handler = netifd_handle_up },
 187         { .name = "down", .handler = netifd_handle_down },
 188         { .name = "status", .handler = netifd_handle_status },
 189 };
 190
 191 static struct ubus_object_type iface_object_type =
 192         UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);
 193
 194
 195 void netifd_ubus_add_interface(struct interface *iface)
 196 {
 197         struct ubus_object *obj = &iface->ubus;
 198         char *name;
 199
 200         name = malloc(strlen(main_object.name) + strlen(iface->name) + 2);
 201         if (!name)
 202                 return;
 203
 204         sprintf(name, "%s.%s", main_object.name, iface->name);
 205         obj->name = name;
 206         obj->type = &iface_object_type;
 207         obj->methods = iface_object_methods;
 208         obj->n_methods = ARRAY_SIZE(iface_object_methods);
 209         if (ubus_add_object(ctx, &iface->ubus)) {
 210                 DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
 211                 free(name);
 212                 obj->name = NULL;
 213         }
 214 }
 215
 216 void netifd_ubus_remove_interface(struct interface *iface)
 217 {
 218         if (!iface->ubus.name)
 219                 return;
 220
 221         ubus_remove_object(ctx, &iface->ubus);
 222         free((void *) iface->ubus.name);
 223 }