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
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
* Copyright (c) 2021 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/ip/ip6_packet.h>
#include <vlib/log.h>
#include "hicn.h"
#include "mapme.h"
#include "mapme_ack.h"
#include "mapme_eventmgr.h"
#include "mgmt.h"
#include "parser.h"
#include "data_fwd.h"
#include "infra.h"
#include "strategy_dpo_manager.h"
#include "error.h"
#include "state.h"
extern hicn_mapme_main_t mapme_main;
/* packet trace format function */
static u8 *hicn_mapme_ack_format_trace (u8 *s, va_list *args);
/* Stats string values */
static char *hicn_mapme_ack_error_strings[] = {
#define _(sym, string) string,
foreach_hicnfwd_error
#undef _
};
/*
* @brief Process incoming ack messages (Interest Update Ack)
* @param vm vlib main data structure
* @param b Control packet (IU)
* @param face_id Ingress face id
*/
bool
hicn_mapme_process_ack (vlib_main_t *vm, vlib_buffer_t *b,
hicn_face_id_t in_face, hicn_prefix_t *prefix,
u32 *seq)
{
seq_t fib_seq;
const dpo_id_t *dpo;
mapme_params_t params;
int rc;
/* Parse incoming message */
rc = hicn_mapme_parse_packet (vlib_buffer_get_current (b), prefix, ¶ms);
if (rc < 0)
goto ERR_PARSE;
*seq = params.seq;
HICN_DEBUG ("ACK - type:%d seq:%d prefix:%U len:%d", params.type, params.seq,
format_ip46_address, &prefix->name, IP46_TYPE_ANY, prefix->len);
dpo = fib_lookup (&(prefix->name.as_ip46), prefix->len,
HICN_MAPME_FIB_LOOKUP_TYPE_EPM);
if (!dpo)
{
HICN_ERROR ("Ignored ACK for non-existing FIB entry %U. Ignored.",
format_ip_prefix, prefix);
return true;
}
/* We are only expecting ACKs for hICN DPOs */
ASSERT (dpo_is_hicn (dpo));
hicn_mapme_tfib_t *tfib = TFIB (hicn_strategy_dpo_ctx_get (dpo->dpoi_index));
if (tfib == NULL)
{
HICN_ERROR ("Unable to get strategy ctx.");
return false;
}
fib_seq = tfib->seq;
/*
* As we always retransmit IU with the latest seq, we are not interested in
* ACKs with inferior seq
*/
if (params.seq < fib_seq)
{
HICN_ERROR ("MAPME: Ignored ACK for low seq");
return true;
}
rc = hicn_mapme_tfib_del (tfib, in_face) != HICN_ERROR_NONE;
if (rc != HICN_ERROR_NONE)
{
HICN_ERROR (
"MAPME: Error deleting next hop %d from TFIB for prefix %U/%d",
in_face, format_ip46_address, &prefix->name, IP46_TYPE_ANY,
prefix->len);
}
/*
* Is the ingress face in TFIB ? if so, remove it, otherwise it might be a
* duplicate
*/
retx_t *retx = vlib_process_signal_event_data (
vm, hicn_mapme_eventmgr_process_node.index, HICN_MAPME_EVENT_FACE_PH_DEL,
1, sizeof (retx_t));
*retx = (retx_t){ .prefix = *prefix, .dpo = *dpo };
return true;
ERR_PARSE:
return false;
}
vlib_node_registration_t hicn_mapme_ack_node;
static uword
hicn_mapme_ack_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
vlib_frame_t *frame)
{
hicn_buffer_t *hb;
hicn_mapme_ack_next_t next_index;
u32 n_left_from, *from, *to_next;
n_left_from = frame->n_vectors;
hicn_prefix_t prefix;
u32 seq;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0) // buffers in the current frame
{
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;
vlib_buffer_t *b0;
u32 next0 = HICN_MAPME_ACK_NEXT_ERROR_DROP;
u32 sw_if_index0;
/* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
vlib_cli_output (vm, "Received IUAck");
hb = hicn_get_buffer (b0);
hicn_mapme_process_ack (vm, b0, hb->face_id, &prefix, &seq);
/* Single loop: process 1 packet here */
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
(b0->flags & VLIB_BUFFER_IS_TRACED)))
{
hicn_mapme_ack_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->sw_if_index = sw_if_index0;
t->next_index = next0;
t->prefix = prefix;
t->seq = seq;
}
/* $$$$$ Done processing 1 packet here $$$$$ */
/* verify speculative enqueue, maybe switch current next frame */
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);
}
// vlib_node_increment_counter (vm, hicn_mapme_ack_node.index,
// HICN_MAPME_ACK_ERROR_SWAPPED, pkts_swapped);
return (frame->n_vectors);
}
/* packet trace format function */
static u8 *
hicn_mapme_ack_format_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 *);
hicn_mapme_ack_trace_t *t = va_arg (*args, hicn_mapme_ack_trace_t *);
s = format (
s,
"MAPME_ACK: pkt: %d, sw_if_index %d, next index %d, prefix %U/%d, seq %u",
(int) t->pkt_type, t->sw_if_index, t->next_index, format_ip46_address,
&t->prefix.name, IP46_TYPE_ANY, t->prefix.len, t->seq);
return (s);
}
/*
* Node registration for the MAP-Me node processing special interests
*/
VLIB_REGISTER_NODE (hicn_mapme_ack_node) =
{
.function = hicn_mapme_ack_node_fn,
.name = "hicn-mapme-ack",
.vector_size = sizeof (u32),
.runtime_data_bytes = sizeof (hicn_mapme_ack_runtime_t),
.format_trace = hicn_mapme_ack_format_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (hicn_mapme_ack_error_strings),
.error_strings = hicn_mapme_ack_error_strings,
.n_next_nodes = HICN_MAPME_ACK_N_NEXT,
.next_nodes =
{
[HICN_MAPME_ACK_NEXT_ERROR_DROP] = "error-drop",
},
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
