rtmac_proto.h

/***
 *
 *  include/rtmac/rtmac_proto.h
 *
 *  rtmac - real-time networking media access control subsystem
 *  Copyright (C) 2002       Marc Kleine-Budde <kleine-budde@gmx.de>,
 *                2003, 2004 Jan Kiszka <Jan.Kiszka@web.de>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef __RTMAC_PROTO_H_
#define __RTMAC_PROTO_H_

#include <stack_mgr.h>


#define RTMAC_VERSION           0x02
#define ETH_RTMAC               0x9021

#define RTMAC_FLAG_TUNNEL       0x01


struct rtmac_hdr {
    u16 type;
    u8  ver;
    u8  flags;
} __attribute__ ((packed));



static inline int rtmac_add_header(struct rtnet_device *rtdev, void *daddr,
                                   struct rtskb *skb, u16 type, u8 flags)
{
    struct rtmac_hdr *hdr =
        (struct rtmac_hdr *)rtskb_push(skb, sizeof(struct rtmac_hdr));


    hdr->type  = htons(type);
    hdr->ver   = RTMAC_VERSION;
    hdr->flags = flags;

    skb->rtdev = rtdev;

    if (rtdev->hard_header &&
        (rtdev->hard_header(skb, rtdev, ETH_RTMAC, daddr,
                            rtdev->dev_addr, skb->len) < 0))
        return -1;

    return 0;
}



static inline int rtmac_xmit(struct rtskb *skb)
{
    struct rtnet_device *rtdev = skb->rtdev;
    int ret;


    ret = rtdev->hard_start_xmit(skb, rtdev);
    if (ret != 0)
        kfree_rtskb(skb);

    return ret;
}


extern struct rtpacket_type rtmac_packet_type;

#define rtmac_proto_init()  rtdev_add_pack(&rtmac_packet_type)
void rtmac_proto_release(void);

#endif /* __RTMAC_PROTO_H_ */