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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* l2_rw is based on vnet classifier and provides a way
* to modify packets matching a given table.
*
* Tables must be created using vnet's classify features.
* Entries contained within these tables must have their
* opaque index set to the rewrite entry created with l2_rw_mod_entry.
*/
#ifndef L2_RW_H_
#define L2_RW_H_
#include <vnet/l2/l2_input.h>
typedef CLIB_PACKED(struct _l2_rw_entry {
u16 skip_n_vectors;
u16 rewrite_n_vectors;
u64 hit_count;
u32x4 *mask;
u32x4 *value;
}) l2_rw_entry_t;
/* l2_rw configuration for one interface */
typedef CLIB_PACKED(struct _l2_rw_config {
u32 table_index; /* Which classify table to use */
u32 miss_index; /* Rewrite entry to use if table does not match */
}) l2_rw_config_t;
typedef struct
{
/* Next feature node indexes */
u32 feat_next_node_index[32];
/* A pool of entries */
l2_rw_entry_t *entries;
/* Config vector indexed by sw_if_index */
l2_rw_config_t *configs;
uword *configs_bitmap;
} l2_rw_main_t;
extern l2_rw_main_t l2_rw_main;
/*
* Specifies which classify table and miss_index should be used
* with the given interface.
* Use special values ~0 in order to un-set table_index
* or miss_index.
* l2_rw feature is automatically enabled for the interface
* when table_index or miss_index is not ~0.
* returns 0 on success and something else on error.
*/
int l2_rw_interface_set_table (u32 sw_if_index,
u32 table_index, u32 miss_index);
/*
* Creates, modifies or delete a rewrite entry.
* If *index != ~0, modifies an existing entry (or simply
* deletes it if is_del is set).
* If *index == ~0, creates a new entry and the created
* entry index is stored in *index (Does nothing if is_del
* is set).
* returns 0 on success and something else on error.
*/
int l2_rw_mod_entry (u32 * index,
u8 * mask, u8 * value, u32 len, u32 skip, u8 is_del);
extern vlib_node_registration_t l2_rw_node;
#endif /* L2_FW_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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