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/*
* File: l2mux.h
*
* MHI L2MUX kernel definitions
*
* 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.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#ifndef LINUX_L2MUX_H
#define LINUX_L2MUX_H
#include <linux/types.h>
#include <linux/socket.h>
#include <net/sock.h>
/* Official L3 protocol IDs */
#define MHI_L3_PHONET 0x00
#define MHI_L3_FILE 0x01
#define MHI_L3_AUDIO 0x02
#define MHI_L3_SECURITY 0x03
#define MHI_L3_TEST 0x04
#define MHI_L3_TEST_PRIO 0x05
#define MHI_L3_XFILE 0x06
#define MHI_L3_MHDP_DL 0x07
#define MHI_L3_MHDP_UL 0x08
#define MHI_L3_AUX_HOST 0x09
#define MHI_L3_THERMAL 0xC1
#define MHI_L3_HIGH_PRIO_TEST 0xFD
#define MHI_L3_MED_PRIO_TEST 0xFE
#define MHI_L3_LOW_PRIO_TEST 0xFF
/* 256 possible protocols */
#define MHI_L3_NPROTO 256
/* Special value for ANY */
#define MHI_L3_ANY 0xFFFF
typedef int (l2mux_skb_fn)(struct sk_buff *skb, struct net_device *dev);
struct l2muxhdr {
__u8 l3_len[3];
__u8 l3_prot;
} __packed;
#define L2MUX_HDR_SIZE (sizeof(struct l2muxhdr))
static inline struct l2muxhdr *l2mux_hdr(struct sk_buff *skb)
{
return (struct l2muxhdr *)skb_mac_header(skb);
}
static inline void l2mux_set_proto(struct l2muxhdr *hdr, int proto)
{
hdr->l3_prot = proto;
}
static inline int l2mux_get_proto(struct l2muxhdr *hdr)
{
return hdr->l3_prot;
}
static inline void l2mux_set_length(struct l2muxhdr *hdr, unsigned len)
{
hdr->l3_len[0] = (len) & 0xFF;
hdr->l3_len[1] = (len >> 8) & 0xFF;
hdr->l3_len[2] = (len >> 16) & 0xFF;
}
static inline unsigned l2mux_get_length(struct l2muxhdr *hdr)
{
return (((unsigned)hdr->l3_len[2]) << 16) |
(((unsigned)hdr->l3_len[1]) << 8) |
((unsigned)hdr->l3_len[0]);
}
extern int l2mux_netif_rx_register(int l3, l2mux_skb_fn *rx_fn);
extern int l2mux_netif_rx_unregister(int l3);
extern int l2mux_netif_tx_register(int pt, l2mux_skb_fn *rx_fn);
extern int l2mux_netif_tx_unregister(int pt);
extern int l2mux_skb_rx(struct sk_buff *skb, struct net_device *dev);
extern int l2mux_skb_tx(struct sk_buff *skb, struct net_device *dev);
#endif /* LINUX_L2MUX_H */
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