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/*
* Copyright (c) 2016 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.
*/
#ifndef __ADJ_DELEGATE_T__
#define __ADJ_DELEGATE_T__
#include <vnet/adj/adj.h>
/**
* Delegate types
*/
typedef enum adj_delegate_type_t_ {
/**
* BFD session state
*/
ADJ_DELEGATE_BFD,
} adj_delegate_type_t;
#define FOR_EACH_ADJ_DELEGATE(_adj, _adt, _aed, _body) \
{ \
for (_adt = ADJ_DELEGATE_BFD; \
_adt <= ADJ_DELEGATE_BFD; \
_adt++) \
{ \
_aed = adj_delegate_get(_adj, _adt); \
if (NULL != _aed) { \
_body; \
} \
} \
}
/**
* Distillation of the BFD session states into a go/no-go for using
* the associated tracked adjacency
*/
typedef enum adj_bfd_state_t_
{
ADJ_BFD_STATE_DOWN,
ADJ_BFD_STATE_UP,
} adj_bfd_state_t;
/**
* A Delagate is a means to implement the Delagation design pattern;
* the extension of an object's functionality through the composition of,
* and delgation to, other objects.
* These 'other' objects are delegates. Delagates are thus attached to
* ADJ objects to extend their functionality.
*/
typedef struct adj_delegate_t_
{
/**
* The ADJ entry object to which the delagate is attached
*/
adj_index_t ad_adj_index;
/**
* The delagate type
*/
adj_delegate_type_t ad_type;
/**
* A union of data for the different delegate types
*/
union
{
/**
* BFD delegate daa
*/
struct {
/**
* BFD session state
*/
adj_bfd_state_t ad_bfd_state;
/**
* BFD session index
*/
u32 ad_bfd_index;
};
};
} adj_delegate_t;
/**
* An ADJ delegate virtual function table
*/
typedef void (*adj_delegate_last_lock_gone_t)(ip_adjacency_t *adj, adj_delegate_t *aed);
typedef u8 * (*adj_delegate_format_t)(const adj_delegate_t *aed, u8 *s);
typedef struct adj_delegate_vft_t_ {
adj_delegate_format_t adv_format;
adj_delegate_last_lock_gone_t adv_last_lock;
} adj_delegate_vft_t;
extern void adj_delegate_remove(ip_adjacency_t *adj,
adj_delegate_type_t type);
extern adj_delegate_t *adj_delegate_find_or_add(ip_adjacency_t *adj,
adj_delegate_type_t fdt);
extern adj_delegate_t *adj_delegate_get(const ip_adjacency_t *adj,
adj_delegate_type_t type);
extern u8 *format_adj_delegate(u8 * s, va_list * args);
extern void adj_delegate_register_type(adj_delegate_type_t type, const adj_delegate_vft_t *vft);
#endif
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