/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2014 Nicira, Inc.
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*/
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#ifndef _NET_MPLS_H
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#define _NET_MPLS_H 1
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <linux/mpls.h>
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#define MPLS_HLEN 4
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struct mpls_shim_hdr {
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__be32 label_stack_entry;
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};
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static inline bool eth_p_mpls(__be16 eth_type)
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{
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return eth_type == htons(ETH_P_MPLS_UC) ||
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eth_type == htons(ETH_P_MPLS_MC);
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}
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static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
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{
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return (struct mpls_shim_hdr *)skb_network_header(skb);
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}
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static inline struct mpls_shim_hdr mpls_entry_encode(u32 label,
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unsigned int ttl,
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unsigned int tc,
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bool bos)
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{
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struct mpls_shim_hdr result;
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result.label_stack_entry =
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cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
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(tc << MPLS_LS_TC_SHIFT) |
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(bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
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(ttl << MPLS_LS_TTL_SHIFT));
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return result;
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}
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#endif
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