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TOMOYO Linux Cross Reference
Linux/include/net/tun_proto.h

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  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 

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