include/net/tun_proto.h

   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