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42 lines
1.9 KiB
42 lines
1.9 KiB
/*
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* Copyright (C) 2001 WIDE Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define LABEL_MASK 0xfffff000
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#define LABEL_SHIFT 12
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#define EXP_MASK 0x00000e00
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#define EXP_SHIFT 9
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#define STACK_MASK 0x00000100
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#define STACK_SHIFT 8
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#define TTL_MASK 0x000000ff
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#define TTL_SHIFT 0
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#define MPLS_LABEL(x) (((x) & LABEL_MASK) >> LABEL_SHIFT)
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#define MPLS_EXP(x) (((x) & EXP_MASK) >> EXP_SHIFT)
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#define MPLS_STACK(x) (((x) & STACK_MASK) >> STACK_SHIFT)
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#define MPLS_TTL(x) (((x) & TTL_MASK) >> TTL_SHIFT)
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