Cregit: Linux 6.10: tun

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Jiri Benc	157	96.32%	3	50.00%
Linus Torvalds (pre-git)	3	1.84%	1	16.67%
Pravin B Shelar	2	1.23%	1	16.67%
Jakub Kiciński	1	0.61%	1	16.67%
Total	163		6

#ifndef __NET_TUN_PROTO_H
#define __NET_TUN_PROTO_H

#include <linux/if_ether.h>
#include <linux/types.h>

/* One byte protocol values as defined by VXLAN-GPE and NSH. These will
 * hopefully get a shared IANA registry.
 */
#define TUN_P_IPV4      0x01
#define TUN_P_IPV6      0x02
#define TUN_P_ETHERNET  0x03
#define TUN_P_NSH       0x04
#define TUN_P_MPLS_UC   0x05

static inline __be16 tun_p_to_eth_p(u8 proto)
{
	switch (proto) {
	case TUN_P_IPV4:
		return htons(ETH_P_IP);
	case TUN_P_IPV6:
		return htons(ETH_P_IPV6);
	case TUN_P_ETHERNET:
		return htons(ETH_P_TEB);
	case TUN_P_NSH:
		return htons(ETH_P_NSH);
	case TUN_P_MPLS_UC:
		return htons(ETH_P_MPLS_UC);
	}
	return 0;
}

static inline u8 tun_p_from_eth_p(__be16 proto)
{
	switch (proto) {
	case htons(ETH_P_IP):
		return TUN_P_IPV4;
	case htons(ETH_P_IPV6):
		return TUN_P_IPV6;
	case htons(ETH_P_TEB):
		return TUN_P_ETHERNET;
	case htons(ETH_P_NSH):
		return TUN_P_NSH;
	case htons(ETH_P_MPLS_UC):
		return TUN_P_MPLS_UC;
	}
	return 0;
}

#endif

tun_proto.h