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_ */