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45 lines
943 B
45 lines
943 B
/* 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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