+static const int blob_type[__BLOBMSG_TYPE_LAST] = {
+ [BLOBMSG_TYPE_INT8] = BLOB_ATTR_INT8,
+ [BLOBMSG_TYPE_INT16] = BLOB_ATTR_INT16,
+ [BLOBMSG_TYPE_INT32] = BLOB_ATTR_INT32,
+ [BLOBMSG_TYPE_INT64] = BLOB_ATTR_INT64,
+ [BLOBMSG_TYPE_DOUBLE] = BLOB_ATTR_DOUBLE,
+ [BLOBMSG_TYPE_STRING] = BLOB_ATTR_STRING,
+ [BLOBMSG_TYPE_UNSPEC] = BLOB_ATTR_BINARY,
+};
+
+static uint16_t
+blobmsg_namelen(const struct blobmsg_hdr *hdr)
+{
+ return be16_to_cpu(hdr->namelen);
+}
+
+bool blobmsg_check_attr(const struct blob_attr *attr, bool name)
+{
+ const struct blobmsg_hdr *hdr;
+ const char *data;
+ int id, len;
+
+ if (blob_len(attr) < sizeof(struct blobmsg_hdr))
+ return false;
+
+ hdr = (void *) attr->data;
+ if (!hdr->namelen && name)
+ return false;
+
+ if (blobmsg_namelen(hdr) > blob_len(attr) - sizeof(struct blobmsg_hdr))
+ return false;
+
+ if (hdr->name[blobmsg_namelen(hdr)] != 0)
+ return false;
+
+ id = blob_id(attr);
+ len = blobmsg_data_len(attr);
+ data = blobmsg_data(attr);
+
+ if (id > BLOBMSG_TYPE_LAST)
+ return false;
+
+ if (!blob_type[id])
+ return true;
+
+ return blob_check_type(data, len, blob_type[id]);
+}
+
+int blobmsg_check_array(const struct blob_attr *attr, int type)
+{
+ struct blob_attr *cur;
+ bool name;
+ int rem;
+ int size = 0;
+
+ switch (blobmsg_type(attr)) {
+ case BLOBMSG_TYPE_TABLE:
+ name = true;
+ break;
+ case BLOBMSG_TYPE_ARRAY:
+ name = false;
+ break;
+ default:
+ return -1;
+ }
+
+ blobmsg_for_each_attr(cur, attr, rem) {
+ if (type != BLOBMSG_TYPE_UNSPEC && blobmsg_type(cur) != type)
+ return -1;
+
+ if (!blobmsg_check_attr(cur, name))
+ return -1;
+
+ size++;
+ }
+
+ return size;
+}
+
+bool blobmsg_check_attr_list(const struct blob_attr *attr, int type)
+{
+ return blobmsg_check_array(attr, type) >= 0;
+}
+
+int blobmsg_parse_array(const struct blobmsg_policy *policy, int policy_len,
+ struct blob_attr **tb, void *data, unsigned int len)
+{
+ struct blob_attr *attr;
+ int i = 0;
+
+ memset(tb, 0, policy_len * sizeof(*tb));
+ __blob_for_each_attr(attr, data, len) {
+ if (policy[i].type != BLOBMSG_TYPE_UNSPEC &&
+ blob_id(attr) != policy[i].type)
+ continue;
+
+ if (!blobmsg_check_attr(attr, false))
+ return -1;
+
+ if (tb[i])
+ continue;
+
+ tb[i++] = attr;
+ if (i == policy_len)
+ break;
+ }
+
+ return 0;
+}
+
+