moep_hdr_ext.h

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/*
 * Copyright 2013, 2014         Maurice Leclaire <leclaire@in.tum.de>
 *                              Stephan M. Guenther <moepi@moepi.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * See COPYING for more details.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __MOEP80211_MOEP_HDR_EXT_H
#define __MOEP80211_MOEP_HDR_EXT_H

#include <moep/types.h>
#include <moep/frame.h>


/* Possible values of header types */
#define MOEP_HDR_NEXTHDR_PRESENT        0x40

#define MOEP_HDR_MASK                   (MOEP_HDR_NEXTHDR_PRESENT - 1)

enum moep_hdr_type {
        MOEP_HDR_INVALID                = 0x00,
        MOEP_HDR_PCTRL,

        MOEP_HDR_VENDOR_MIN             = 0x20,

        MOEP_HDR_COUNT                  = MOEP_HDR_MASK + 1,
};

struct moep_hdr_ext {
        u8 type;
        u8 len;
} __attribute__((packed));

struct moep_hdr_pctrl {
        struct moep_hdr_ext hdr;
        u16 type;
        u16 len;
} __attribute__((packed));


struct moep_hdr_ext *moep_frame_moep_hdr_ext(moep_frame_t frame,
                                             enum moep_hdr_type type);

struct moep_hdr_ext *moep_frame_add_moep_hdr_ext(moep_frame_t frame,
                                                 enum moep_hdr_type type,
                                                 size_t len);

struct moep_hdr_ext *moep_frame_set_moep_hdr_ext(moep_frame_t frame,
                                                 struct moep_hdr_ext *ext);

int moep_frame_del_moep_hdr_ext(moep_frame_t frame,
                                enum moep_hdr_type type);

#endif /* __MOEP80211_MOEP_HDR_EXT_H */