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