1#ifndef __NET_TUN_PROTO_H
 2#define __NET_TUN_PROTO_H
 3
 4#include <linux/if_ether.h>
 5#include <linux/types.h>
 6
 7/* One byte protocol values as defined by VXLAN-GPE and NSH. These will
 8 * hopefully get a shared IANA registry.
 9 */
10#define TUN_P_IPV4      0x01
11#define TUN_P_IPV6      0x02
12#define TUN_P_ETHERNET  0x03
13#define TUN_P_NSH       0x04
14#define TUN_P_MPLS_UC   0x05
15
16static inline __be16 tun_p_to_eth_p(u8 proto)
17{
18	switch (proto) {
19	case TUN_P_IPV4:
20		return htons(ETH_P_IP);
21	case TUN_P_IPV6:
22		return htons(ETH_P_IPV6);
23	case TUN_P_ETHERNET:
24		return htons(ETH_P_TEB);
25	case TUN_P_NSH:
26		return htons(ETH_P_NSH);
27	case TUN_P_MPLS_UC:
28		return htons(ETH_P_MPLS_UC);
29	}
30	return 0;
31}
32
33static inline u8 tun_p_from_eth_p(__be16 proto)
34{
35	switch (proto) {
36	case htons(ETH_P_IP):
37		return TUN_P_IPV4;
38	case htons(ETH_P_IPV6):
39		return TUN_P_IPV6;
40	case htons(ETH_P_TEB):
41		return TUN_P_ETHERNET;
42	case htons(ETH_P_NSH):
43		return TUN_P_NSH;
44	case htons(ETH_P_MPLS_UC):
45		return TUN_P_MPLS_UC;
46	}
47	return 0;
48}
49
50#endif