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41 lines
1.9 KiB
41 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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