| /* |
| * Copyright (C) 2013-2015 Kay Sievers |
| * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| * Copyright (C) 2013-2015 Daniel Mack <daniel@zonque.org> |
| * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@gmail.com> |
| * Copyright (C) 2013-2015 Linux Foundation |
| * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@opendz.org> |
| * |
| * kdbus 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; either version 2.1 of the License, or (at |
| * your option) any later version. |
| */ |
| |
| #ifndef __KDBUS_ITEM_H |
| #define __KDBUS_ITEM_H |
| |
| #include <linux/kernel.h> |
| #include <uapi/linux/kdbus.h> |
| |
| #include "util.h" |
| |
| /* generic access and iterators over a stream of items */ |
| #define KDBUS_ITEM_NEXT(_i) (typeof(_i))(((u8 *)_i) + KDBUS_ALIGN8((_i)->size)) |
| #define KDBUS_ITEMS_SIZE(_h, _is) ((_h)->size - offsetof(typeof(*_h), _is)) |
| #define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data) |
| #define KDBUS_ITEM_SIZE(_s) KDBUS_ALIGN8(KDBUS_ITEM_HEADER_SIZE + (_s)) |
| #define KDBUS_ITEM_PAYLOAD_SIZE(_i) ((_i)->size - KDBUS_ITEM_HEADER_SIZE) |
| |
| #define KDBUS_ITEMS_FOREACH(_i, _is, _s) \ |
| for (_i = _is; \ |
| ((u8 *)(_i) < (u8 *)(_is) + (_s)) && \ |
| ((u8 *)(_i) >= (u8 *)(_is)); \ |
| _i = KDBUS_ITEM_NEXT(_i)) |
| |
| #define KDBUS_ITEM_VALID(_i, _is, _s) \ |
| ((_i)->size >= KDBUS_ITEM_HEADER_SIZE && \ |
| (u8 *)(_i) + (_i)->size > (u8 *)(_i) && \ |
| (u8 *)(_i) + (_i)->size <= (u8 *)(_is) + (_s) && \ |
| (u8 *)(_i) >= (u8 *)(_is)) |
| |
| #define KDBUS_ITEMS_END(_i, _is, _s) \ |
| ((u8 *)_i == ((u8 *)(_is) + KDBUS_ALIGN8(_s))) |
| |
| /** |
| * struct kdbus_item_header - Describes the fix part of an item |
| * @size: The total size of the item |
| * @type: The item type, one of KDBUS_ITEM_* |
| */ |
| struct kdbus_item_header { |
| u64 size; |
| u64 type; |
| }; |
| |
| int kdbus_item_validate_name(const struct kdbus_item *item); |
| int kdbus_item_validate(const struct kdbus_item *item); |
| int kdbus_items_validate(const struct kdbus_item *items, size_t items_size); |
| const char *kdbus_items_get_str(const struct kdbus_item *items, |
| size_t items_size, |
| unsigned int item_type); |
| struct kdbus_item *kdbus_item_set(struct kdbus_item *item, u64 type, |
| const void *data, size_t len); |
| |
| #endif |