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 16 static 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 33 static 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 51