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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* nhrp.h: next-hop resolution
*
* 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.
*/
#include <vnet/nhrp/nhrp.h>
#include <vnet/fib/fib_table.h>
#include <vnet/adj/adj_midchain.h>
static uword *nhrp_db;
static nhrp_entry_t *nhrp_pool;
void
nhrp_entry_adj_stack (const nhrp_entry_t * ne, adj_index_t ai)
{
adj_midchain_delegate_stack (ai, ne->ne_fib_index, &ne->ne_nh);
}
static adj_walk_rc_t
nhrp_entry_add_adj_walk (adj_index_t ai, void *ctx)
{
nhrp_entry_adj_stack (ctx, ai);
return (ADJ_WALK_RC_CONTINUE);
}
static adj_walk_rc_t
nhrp_entry_del_adj_walk (adj_index_t ai, void *ctx)
{
adj_midchain_delegate_unstack (ai);
return (ADJ_WALK_RC_CONTINUE);
}
nhrp_entry_t *
nhrp_entry_get (index_t nei)
{
return pool_elt_at_index (nhrp_pool, nei);
}
nhrp_entry_t *
nhrp_entry_find (u32 sw_if_index, const ip46_address_t * peer)
{
nhrp_key_t nk = {
.nk_peer = *peer,
.nk_sw_if_index = sw_if_index,
};
uword *p;
p = hash_get_mem (nhrp_db, &nk);
if (NULL != p)
return nhrp_entry_get (p[0]);
return (NULL);
}
int
nhrp_entry_add (u32 sw_if_index,
const ip46_address_t * peer,
u32 nh_table_id, const ip46_address_t * nh)
{
fib_protocol_t fproto;
nhrp_entry_t *ne;
u32 fib_index;
index_t nei;
fproto = (ip46_address_is_ip4 (nh) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
fib_index = fib_table_find (fproto, nh_table_id);
if (~0 == fib_index)
{
return (VNET_API_ERROR_NO_SUCH_FIB);
}
ne = nhrp_entry_find (sw_if_index, peer);
if (NULL == ne)
{
nhrp_key_t nk = {
.nk_peer = *peer,
.nk_sw_if_index = sw_if_index,
};
nhrp_entry_t *ne;
pool_get_zero (nhrp_pool, ne);
nei = ne - nhrp_pool;
ne->ne_key = clib_mem_alloc (sizeof (*ne->ne_key));
clib_memcpy (ne->ne_key, &nk, sizeof (*ne->ne_key));
ip46_address_copy (&ne->ne_nh.fp_addr, nh);
ne->ne_nh.fp_proto = fproto;
ne->ne_nh.fp_len = (ne->ne_nh.fp_proto == FIB_PROTOCOL_IP4 ? 32 : 128);
ne->ne_fib_index = fib_index;
hash_set_mem (nhrp_db, ne->ne_key, nei);
adj_nbr_walk_nh (sw_if_index,
ne->ne_nh.fp_proto,
&ne->ne_key->nk_peer, nhrp_entry_add_adj_walk, ne);
}
else
return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS);
return 0;
}
int
nhrp_entry_del (u32 sw_if_index, const ip46_address_t * peer)
{
nhrp_entry_t *ne;
ne = nhrp_entry_find (sw_if_index, peer);
if (ne != NULL)
{
hash_unset_mem (nhrp_db, ne->ne_key);
adj_nbr_walk_nh (sw_if_index,
ne->ne_nh.fp_proto,
&ne->ne_key->nk_peer, nhrp_entry_del_adj_walk, ne);
clib_mem_free (ne->ne_key);
pool_put (nhrp_pool, ne);
}
else
return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS);
return 0;
}
u8 *
format_nhrp_entry (u8 * s, va_list * args)
{
index_t nei = va_arg (*args, index_t);
vnet_main_t *vnm = vnet_get_main ();
nhrp_entry_t *ne;
ne = nhrp_entry_get (nei);
s = format (s, "[%d] ", nei);
s = format (s, "%U:", format_vnet_sw_if_index_name,
vnm, ne->ne_key->nk_sw_if_index);
s = format (s, " %U", format_ip46_address,
&ne->ne_key->nk_peer, IP46_TYPE_ANY);
s = format (s, " via [%d]:%U",
fib_table_get_table_id (ne->ne_fib_index, ne->ne_nh.fp_proto),
format_fib_prefix, &ne->ne_nh);
return (s);
}
void
nhrp_walk (nhrp_walk_cb_t fn, void *ctx)
{
index_t nei;
/* *INDENT-OFF* */
pool_foreach_index(nei, nhrp_pool,
({
fn(nei, ctx);
}));
/* *INDENT-ON* */
}
static clib_error_t *
nhrp_init (vlib_main_t * vm)
{
nhrp_db = hash_create_mem (0, sizeof (nhrp_key_t), sizeof (u32));
return (NULL);
}
VLIB_INIT_FUNCTION (nhrp_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
