summaryrefslogtreecommitdiffstats
path: root/hicn-plugin/src/strategies/dpo_rr.c
blob: a67b06acba4d38124cf15c572bf9c8fc6f8eb088 (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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
/*
 * 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.
 */

#include "dpo_rr.h"
#include "strategy_rr.h"
#include "../strategy_dpo_manager.h"
#include "../strategy_dpo_ctx.h"

/**
 * @brief DPO type value for the rr_strategy
 */
static dpo_type_t hicn_dpo_type_rr;

static const hicn_dpo_vft_t hicn_dpo_rr_vft = {
  .hicn_dpo_is_type = &hicn_dpo_is_type_strategy_rr,
  .hicn_dpo_get_type = &hicn_dpo_strategy_rr_get_type,
  .hicn_dpo_module_init = &hicn_dpo_strategy_rr_module_init,
  .hicn_dpo_create = &hicn_strategy_rr_ctx_create,
  .hicn_dpo_add_update_nh = &hicn_strategy_rr_ctx_add_nh,
  .hicn_dpo_del_nh = &hicn_strategy_rr_ctx_del_nh,
  .hicn_dpo_format = &hicn_strategy_rr_format_ctx
};

int
hicn_dpo_is_type_strategy_rr (const dpo_id_t * dpo)
{
  return dpo->dpoi_type == hicn_dpo_type_rr;
}

void
hicn_dpo_strategy_rr_module_init (void)
{
  /*
   * Register our type of dpo
   */
  hicn_dpo_type_rr =
    hicn_dpo_register_new_type (hicn_nodes_strategy, &hicn_dpo_rr_vft,
				hicn_rr_strategy_get_vft (),
				&dpo_strategy_rr_ctx_vft);
}

dpo_type_t
hicn_dpo_strategy_rr_get_type (void)
{
  return hicn_dpo_type_rr;
}

//////////////////////////////////////////////////////////////////////////////////////////////////


u8 *
hicn_strategy_rr_format_ctx (u8 * s, int n, ...)
{
  va_list args;
  va_start (args, n);
  s = format_hicn_strategy_rr_ctx (s, &args);
  return s;
}

u8 *
format_hicn_strategy_rr_ctx (u8 * s, va_list * ap)
{
  int i = 0;
  index_t index = va_arg (*ap, index_t);
  hicn_dpo_ctx_t *dpo_ctx = NULL;
  hicn_strategy_rr_ctx_t *rr_dpo_ctx = NULL;
  dpo_id_t *next_hop = NULL;
  hicn_face_vft_t *face_vft = NULL;
  u32 indent = va_arg (*ap, u32);

  dpo_ctx = hicn_strategy_dpo_ctx_get (index);
  if (dpo_ctx == NULL)
    return s;

  rr_dpo_ctx = (hicn_strategy_rr_ctx_t *) dpo_ctx->data;

  s =
    format (s, "hicn-rr, next hop Face %d",
	    dpo_ctx->next_hops[rr_dpo_ctx->current_nhop].dpoi_index);

  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX; i++)
    {
      u8 *buf = NULL;
      if (i < dpo_ctx->entry_count)
	buf = format (NULL, "FIB");
      else if (i >=
	       HICN_PARAM_FIB_ENTRY_NHOPS_MAX - dpo_ctx->tfib_entry_count)
	buf = format (NULL, "TFIB");
      else
	continue;

      next_hop = &dpo_ctx->next_hops[i];
      face_vft = hicn_face_get_vft (next_hop->dpoi_type);
      if (face_vft != NULL)
	{
	  s = format (s, "\n");
	  s =
	    format (s, "%U ", face_vft->format_face, next_hop->dpoi_index,
		    indent);
	  s = format (s, " %s", buf);
	}
    }

  return (s);
}

void
hicn_strategy_rr_ctx_create (dpo_proto_t proto, const dpo_id_t * next_hop,
			     int nh_len, index_t * dpo_idx)
{
  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx;
  hicn_dpo_ctx_t *hicn_strategy_ctx;

  /* Allocate a hicn_dpo_ctx on the vpp pool and initialize it */
  hicn_strategy_ctx = hicn_strategy_dpo_ctx_alloc ();
  hicn_strategy_rr_ctx = (hicn_strategy_rr_ctx_t *) hicn_strategy_ctx->data;

  *dpo_idx = hicn_strategy_dpo_ctx_get_index (hicn_strategy_ctx);

  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_rr);

  hicn_strategy_rr_ctx->current_nhop = 0;
}

int
hicn_strategy_rr_ctx_add_nh (const dpo_id_t * nh, index_t dpo_idx)
{
  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
  u8 pos = 0;

  if (hicn_strategy_dpo_ctx == NULL)
    {
      return HICN_ERROR_STRATEGY_NOT_FOUND;
    }

  hicn_strategy_dpo_ctx_add_nh (nh, hicn_strategy_dpo_ctx, &pos);
  //nothing else to initialize in this strategy
  return HICN_ERROR_NONE;
}

int
hicn_strategy_rr_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx)
{
  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
  //No need to change the current_nhop. It will be updated at the next selection.
  return hicn_strategy_dpo_ctx_del_nh (face_id, hicn_strategy_dpo_ctx);
}

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