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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* Copyright (c) 2018 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.
*/
/**
* @brief
* The data-path object representing performing a lookup in the IPv6
* link local table
*/
#include <vnet/dpo/ip6_ll_dpo.h>
#include <vnet/ip/ip6_ll_table.h>
/**
* @brief the IP6 link-local DPO is global
*/
static dpo_id_t ip6_ll_dpo = {
.dpoi_type = DPO_IP6_LL,
.dpoi_proto = DPO_PROTO_IP6,
.dpoi_index = 0,
};
const dpo_id_t *
ip6_ll_dpo_get (void)
{
return (&ip6_ll_dpo);
}
static void
ip6_ll_dpo_lock (dpo_id_t * dpo)
{
/*
* not maintaining a lock count on the ip6_ll, they are const global and
* never die.
*/
}
static void
ip6_ll_dpo_unlock (dpo_id_t * dpo)
{
}
static u8 *
format_ip6_ll_dpo (u8 * s, va_list * ap)
{
CLIB_UNUSED (index_t index) = va_arg (*ap, index_t);
CLIB_UNUSED (u32 indent) = va_arg (*ap, u32);
return (format (s, "ip6-link-local"));
}
const static dpo_vft_t ip6_ll_vft = {
.dv_lock = ip6_ll_dpo_lock,
.dv_unlock = ip6_ll_dpo_unlock,
.dv_format = format_ip6_ll_dpo,
};
/**
* @brief The per-protocol VLIB graph nodes that are assigned to a ip6_ll
* object.
*
* this means that these graph nodes are ones from which a ip6_ll is the
* parent object in the DPO-graph.
*/
const static char *const ip6_null_nodes[] = {
"ip6-link-local",
NULL,
};
const static char *const *const ip6_ll_nodes[DPO_PROTO_NUM] = {
[DPO_PROTO_IP6] = ip6_null_nodes,
};
typedef struct ip6_ll_dpo_trace_t_
{
u32 fib_index;
u32 sw_if_index;
} ip6_ll_dpo_trace_t;
/**
* @brief Exit nodes from a IP6_LL
*/
typedef enum ip6_ll_next_t_
{
IP6_LL_NEXT_DROP,
IP6_LL_NEXT_LOOKUP,
IP6_LL_NEXT_NUM,
} ip6_ll_next_t;
typedef enum ip6_ll_error_t_
{
IP6_LL_ERROR_NO_TABLE,
} ip6_ll_error_t;
always_inline uword
ip6_ll_dpo_inline (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left_from, next_index, *from, *to_next;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0, fib_index0, next0;
vlib_buffer_t *p0;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
next0 = IP6_LL_NEXT_LOOKUP;
p0 = vlib_get_buffer (vm, bi0);
/* use the packet's RX interface to pick the link-local FIB */
fib_index0 =
ip6_ll_fib_get (vnet_buffer (p0)->sw_if_index[VLIB_RX]);
if (~0 == fib_index0)
{
next0 = IP6_LL_NEXT_DROP;
p0->error = node->errors[IP6_LL_ERROR_NO_TABLE];
goto trace0;
}
/* write that fib index into the packet so it's used in the
* lookup node next */
vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
trace0:
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
ip6_ll_dpo_trace_t *tr = vlib_add_trace (vm, node, p0,
sizeof (*tr));
tr->sw_if_index = vnet_buffer (p0)->sw_if_index[VLIB_RX];
tr->fib_index = fib_index0;
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
static u8 *
format_ip6_ll_dpo_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
ip6_ll_dpo_trace_t *t = va_arg (*args, ip6_ll_dpo_trace_t *);
s = format (s, "sw_if_index:%d fib_index:%d", t->sw_if_index, t->fib_index);
return s;
}
static uword
ip6_ll_dpo_switch (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return (ip6_ll_dpo_inline (vm, node, frame));
}
static char *ip6_ll_dpo_error_strings[] = {
[IP6_LL_ERROR_NO_TABLE] = "Interface is not mapped to an IP6-LL table",
};
/**
* @brief
*/
VLIB_REGISTER_NODE (ip6_ll_dpo_node) =
{
.function = ip6_ll_dpo_switch,
.name = "ip6-link-local",
.vector_size = sizeof (u32),
.format_trace = format_ip6_ll_dpo_trace,
.n_errors = ARRAY_LEN (ip6_ll_dpo_error_strings),
.error_strings = ip6_ll_dpo_error_strings,
.n_next_nodes = IP6_LL_NEXT_NUM,
.next_nodes = {
[IP6_LL_NEXT_DROP] = "ip6-drop",
[IP6_LL_NEXT_LOOKUP] = "ip6-lookup",
},
};
void
ip6_ll_dpo_module_init (void)
{
dpo_register (DPO_IP6_LL, &ip6_ll_vft, ip6_ll_nodes);
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
