85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/*
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* Copyright (c) 2020 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 __LCP_ADJ_DELEGATE_H__
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#define __LCP_ADJ_DELEGATE_H__
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#include <vppinfra/bihash_32_8.h>
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typedef struct lcp_adj_key_t_
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{
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u32 sw_if_index;
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u8 rewrite[28];
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} lcp_adj_key_t;
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STATIC_ASSERT (sizeof (lcp_adj_key_t) == 32, "LCP ADJ Key size changed");
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typedef struct lcp_adj_kv_t_
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{
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union
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{
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BVT (clib_bihash_kv) kv;
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struct
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{
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lcp_adj_key_t k;
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u64 v;
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};
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};
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} lcp_adj_kv_t;
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STATIC_ASSERT (sizeof (lcp_adj_kv_t) == sizeof (BVT (clib_bihash_kv)),
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"LCP ADJ Key size changed");
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/**
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* The table of adjacencies indexed by the rewrite string
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*/
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extern BVT (clib_bihash) lcp_adj_tbl;
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static_always_inline void
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lcp_adj_mk_key (const u8 *rewrite, u8 len, u32 sw_if_index, lcp_adj_key_t *key)
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{
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/*
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* Construct the key from the provided rewrite, then pad with zeros
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* to ensure the key does not have garbage bytes
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*/
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ASSERT (len <= sizeof (key->rewrite));
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clib_memcpy_fast (key->rewrite, rewrite, len);
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clib_memset (key->rewrite + len, 0, sizeof (key->rewrite) - len);
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key->sw_if_index = sw_if_index;
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}
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static_always_inline adj_index_t
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lcp_adj_lkup (const u8 *rewrite, u8 len, u32 sw_if_index)
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{
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lcp_adj_kv_t kv;
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lcp_adj_mk_key (rewrite, len, sw_if_index, &kv.k);
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if (!BV (clib_bihash_search_inline) (&lcp_adj_tbl, &kv.kv))
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return (kv.v);
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return (ADJ_INDEX_INVALID);
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}
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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#endif
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