+bool ubus_has_prefix(const char *name, const char *ifname)
+{
+ struct blob_attr *c, *cur;
+ unsigned rem;
+
+ if (!dump)
+ return NULL;
+
+ blobmsg_for_each_attr(c, dump, rem) {
+ struct blob_attr *tb[IFACE_ATTR_MAX];
+ blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blobmsg_data(c), blobmsg_data_len(c));
+
+ if (!tb[IFACE_ATTR_INTERFACE] || !tb[IFACE_ATTR_IFNAME])
+ continue;
+
+ if (strcmp(name, blobmsg_get_string(tb[IFACE_ATTR_INTERFACE])) ||
+ strcmp(ifname, blobmsg_get_string(tb[IFACE_ATTR_IFNAME])))
+ continue;
+
+ if ((cur = tb[IFACE_ATTR_PREFIX])) {
+ if (blobmsg_type(cur) != BLOBMSG_TYPE_ARRAY || !blobmsg_check_attr(cur, false))
+ continue;
+
+ struct blob_attr *d;
+ unsigned drem;
+ blobmsg_for_each_attr(d, cur, drem) {
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+