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 15 static 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 32 static 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 50