9ca18c604a
Change-Id: Ic54d4cb9dec8e91446b9b4d2b40ed69a14bd4355 Signed-off-by: Neale Ranns <nranns@cisco.com>
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*
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* Copyright (c) 2016 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __MPLS_LABEL_DPO_H__
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#define __MPLS_LABEL_DPO_H__
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#include <vnet/vnet.h>
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#include <vnet/mpls/packet.h>
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#include <vnet/dpo/dpo.h>
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/**
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* A representation of an MPLS label for imposition in the data-path
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*/
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typedef struct mpls_label_dpo_t
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{
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/**
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* The MPLS label header to impose. Outer most label first.
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*/
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mpls_unicast_header_t mld_hdr[8];
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/**
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* Next DPO in the graph
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*/
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dpo_id_t mld_dpo;
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/**
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* The protocol of the payload/packets that are being encapped
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*/
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dpo_proto_t mld_payload_proto;
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/**
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* Size of the label stack
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*/
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u16 mld_n_labels;
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/**
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* Cached amount of header bytes to paint
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*/
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u16 mld_n_hdr_bytes;
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/**
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* Number of locks/users of the label
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*/
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u16 mld_locks;
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} mpls_label_dpo_t;
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/**
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* @brief Assert that the MPLS label object is less than a cache line in size.
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* Should this get any bigger then we will need to reconsider how many labels
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* can be pushed in one object.
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*/
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_Static_assert((sizeof(mpls_label_dpo_t) <= CLIB_CACHE_LINE_BYTES),
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"MPLS label DPO is larger than one cache line.");
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/**
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* @brief Create an MPLS label object
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*
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* @param label_stack The stack if labels to impose, outer most label first
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* @param eos The inner most label's EOS bit
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* @param ttl The inner most label's TTL bit
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* @param exp The inner most label's EXP bit
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* @param payload_proto The ptocool of the payload packets that will
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* be imposed with this label header.
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* @param dpo The parent of the created MPLS label object
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*/
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extern index_t mpls_label_dpo_create(mpls_label_t *label_stack,
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mpls_eos_bit_t eos,
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u8 ttl,
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u8 exp,
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dpo_proto_t payload_proto,
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const dpo_id_t *dpo);
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extern u8* format_mpls_label_dpo(u8 *s, va_list *args);
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/*
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* Encapsulation violation for fast data-path access
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*/
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extern mpls_label_dpo_t *mpls_label_dpo_pool;
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static inline mpls_label_dpo_t *
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mpls_label_dpo_get (index_t index)
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{
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return (pool_elt_at_index(mpls_label_dpo_pool, index));
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}
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extern void mpls_label_dpo_module_init(void);
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#endif
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