summaryrefslogtreecommitdiffstats
path: root/hicn-plugin/src/strategies/dpo_mw.h
blob: 433c415fb1a551b3b9c8a23a08aff8f4780b0368 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/*
 * Copyright (c) 2017-2020 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 __HICN_DPO_MW_H__
#define __HICN_DPO_MW_H__

#include <vnet/dpo/dpo.h>
#include "../strategy_dpo_ctx.h"

/**
 * @file dpo_mw.h
 *
 * This file implements the strategy vtf (see strategy.h) and
 * the dpo vft (see strategy_dpo_manager.h) for the strategy
 * maximum weight
 */

#define DEFAULT_WEIGHT 0

typedef struct hicn_strategy_mw_ctx_s
{
  u8 weight[HICN_PARAM_FIB_ENTRY_NHOPS_MAX];
} hicn_strategy_mw_ctx_t;

/**
 * @brief Format the dpo ctx for a human-readable string
 *
 * @param s String to which to append the formatted dpo ctx
 * @param ap List of parameters for the formatting
 *
 * @result The string with the formatted dpo ctx
 */
u8 *format_hicn_strategy_mw_ctx (u8 * s, va_list * ap);

const static dpo_vft_t dpo_strategy_mw_ctx_vft = {
  .dv_lock = hicn_strategy_dpo_ctx_lock,
  .dv_unlock = hicn_strategy_dpo_ctx_unlock,
  .dv_format = format_hicn_strategy_mw_ctx,
};

/**
 * @brief Retrieve an hicn_strategy_mw_ctx object
 *
 * @param indext Index of the hicn_dpo_ctx to retrieve
 * @return The hicn_dpo_ctx object or NULL
 */
hicn_dpo_ctx_t *hicn_strategy_mw_ctx_get (index_t index);

/**
 * @brief Create a new mw ctx
 *
 * @param proto The protocol to which the dpo is meant for (see vpp docs)
 * @param next_hop A list of next hops to be inserted in the dpo ctx
 * @param nh_len Size of the list
 * @param dpo_idx index_t that will hold the index of the created dpo ctx
 * @return HICN_ERROR_NONE if the creation was fine, otherwise EINVAL
 */
void
hicn_strategy_mw_ctx_create (fib_protocol_t proto, const hicn_face_id_t * next_hop,
			     int nh_len, index_t * dpo_idx);

/**
 * @brief Add or update a next hop in the dpo ctx.
 *
 * This function is meant to be used in the control plane and not in the data plane,
 * as it is not optimized for the latter.
 *
 * @param nh Next hop to insert in the dpo ctx
 * @param dpo_idx Index of the dpo ctx to update with the new or updated next
 * hop
 * @return HICN_ERROR_NONE if the update or insert was fine,
 * otherwise HICN_ERROR_DPO_CTX_NOT_FOUND
 */
int hicn_strategy_mw_ctx_add_nh (hicn_face_id_t nh, index_t dpo_idx);

/**
 * @brief Delete a next hop in the dpo ctx.
 *
 * @param face_id Face identifier of the next hop
 * @param dpo_idx Index of the dpo ctx to update with the new or updated next
 * hop
 * @return HICN_ERROR_NONE if the update or insert was fine,
 * otherwise HICN_ERROR_DPO_CTS_NOT_FOUND
 */
int hicn_strategy_mw_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx);

/**
 * @brief Prefetch a dpo
 *
 * @param dpo_idx Index of the dpo ctx to prefetch
 */
void hicn_strategy_mw_ctx_prefetch (index_t dpo_idx);

/**
 * @brief Return true if the dpo is of type strategy mw
 *
 * @param dpo Dpo to check the type
 */
int hicn_dpo_is_type_strategy_mw (const dpo_id_t * dpo);

/**
 * @brief Initialize the Maximum Weight strategy
 */
void hicn_dpo_strategy_mw_module_init (void);

/**
 * @brief Return the dpo type for the Maximum Weight strategy
 */
dpo_type_t hicn_dpo_strategy_mw_get_type (void);

/**
 * @brief Format the dpo ctx for the strategy Maximum Weight
 *
 * @param s String to append the formatted dpo ctx
 * @param ap List of arguments to format
 */
u8 *format_hicn_dpo_strategy_mw (u8 * s, va_list * ap);

/**
 * @brief Format the dpo ctx for the strategy Maximum Weight. To
 * call from other functions
 *
 * @param s String to append the formatted dpo ctx
 * @param ... List of arguments to format
 */
u8 *hicn_strategy_mw_format_ctx (u8 * s, int n, ...);


#endif // __HICN_DPO_MW_H__

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */