fa20e0e32c
The values are shared between VXLAN-GPE and NSH. Originally probably by coincidence but I notified both working groups about this last year and they seem to keep the values in sync since then. Hopefully they'll get a single IANA registry for the values, too. (I asked them for that.) Factor out the code to be shared by the NSH implementation. NSH and MPLS values are added in this patch, too. For MPLS, the drafts incorrectly assign only a single value, while we have two MPLS ethertypes. I raised the problem with both groups. For now, I assume the value is for unicast. Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
49 lines
988 B
C
49 lines
988 B
C
#ifndef __NET_TUN_PROTO_H
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#define __NET_TUN_PROTO_H
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#include <linux/kernel.h>
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/* One byte protocol values as defined by VXLAN-GPE and NSH. These will
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* hopefully get a shared IANA registry.
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*/
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#define TUN_P_IPV4 0x01
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#define TUN_P_IPV6 0x02
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#define TUN_P_ETHERNET 0x03
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#define TUN_P_NSH 0x04
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#define TUN_P_MPLS_UC 0x05
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static inline __be16 tun_p_to_eth_p(u8 proto)
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{
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switch (proto) {
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case TUN_P_IPV4:
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return htons(ETH_P_IP);
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case TUN_P_IPV6:
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return htons(ETH_P_IPV6);
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case TUN_P_ETHERNET:
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return htons(ETH_P_TEB);
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case TUN_P_NSH:
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return htons(ETH_P_NSH);
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case TUN_P_MPLS_UC:
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return htons(ETH_P_MPLS_UC);
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}
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return 0;
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}
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static inline u8 tun_p_from_eth_p(__be16 proto)
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{
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switch (proto) {
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case htons(ETH_P_IP):
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return TUN_P_IPV4;
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case htons(ETH_P_IPV6):
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return TUN_P_IPV6;
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case htons(ETH_P_TEB):
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return TUN_P_ETHERNET;
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case htons(ETH_P_NSH):
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return TUN_P_NSH;
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case htons(ETH_P_MPLS_UC):
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return TUN_P_MPLS_UC;
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}
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return 0;
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}
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#endif
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