| /* SPDX-License-Identifier: LGPL-2.1 */ |
| |
| /* |
| * NETLINK Netlink attributes |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation version 2.1 |
| * of the License. |
| * |
| * Copyright (c) 2003-2013 Thomas Graf <tgraf@suug.ch> |
| */ |
| |
| #ifndef __NLATTR_H |
| #define __NLATTR_H |
| |
| #include <stdint.h> |
| #include <linux/netlink.h> |
| /* avoid multiple definition of netlink features */ |
| #define __LINUX_NETLINK_H |
| |
| /** |
| * Standard attribute types to specify validation policy |
| */ |
| enum { |
| NLA_UNSPEC, /**< Unspecified type, binary data chunk */ |
| NLA_U8, /**< 8 bit integer */ |
| NLA_U16, /**< 16 bit integer */ |
| NLA_U32, /**< 32 bit integer */ |
| NLA_U64, /**< 64 bit integer */ |
| NLA_STRING, /**< NUL terminated character string */ |
| NLA_FLAG, /**< Flag */ |
| NLA_MSECS, /**< Micro seconds (64bit) */ |
| NLA_NESTED, /**< Nested attributes */ |
| __NLA_TYPE_MAX, |
| }; |
| |
| #define NLA_TYPE_MAX (__NLA_TYPE_MAX - 1) |
| |
| /** |
| * @ingroup attr |
| * Attribute validation policy. |
| * |
| * See section @core_doc{core_attr_parse,Attribute Parsing} for more details. |
| */ |
| struct nla_policy { |
| /** Type of attribute or NLA_UNSPEC */ |
| uint16_t type; |
| |
| /** Minimal length of payload required */ |
| uint16_t minlen; |
| |
| /** Maximal length of payload allowed */ |
| uint16_t maxlen; |
| }; |
| |
| /** |
| * @ingroup attr |
| * Iterate over a stream of attributes |
| * @arg pos loop counter, set to current attribute |
| * @arg head head of attribute stream |
| * @arg len length of attribute stream |
| * @arg rem initialized to len, holds bytes currently remaining in stream |
| */ |
| #define nla_for_each_attr(pos, head, len, rem) \ |
| for (pos = head, rem = len; \ |
| nla_ok(pos, rem); \ |
| pos = nla_next(pos, &(rem))) |
| |
| int nla_dump_errormsg(struct nlmsghdr *nlh); |
| |
| #endif /* __NLATTR_H */ |