|
1
|
|
|
"""flow_builder module responsible for building and mapping flows.""" |
|
2
|
|
|
|
|
3
|
1 |
|
import copy |
|
4
|
1 |
|
from collections import defaultdict |
|
5
|
1 |
|
import itertools |
|
6
|
|
|
|
|
7
|
1 |
|
from typing import Literal |
|
8
|
|
|
|
|
9
|
1 |
|
from napps.kytos.telemetry_int import utils |
|
10
|
1 |
|
from napps.kytos.telemetry_int.exceptions import FlowsNotFound |
|
11
|
1 |
|
from napps.kytos.telemetry_int import settings |
|
12
|
|
|
|
|
13
|
|
|
|
|
14
|
1 |
|
class FlowBuilder: |
|
15
|
|
|
"""FlowBuilder.""" |
|
16
|
|
|
|
|
17
|
1 |
|
def __init__(self): |
|
18
|
|
|
"""Constructor of FlowBuilder.""" |
|
19
|
1 |
|
self.table_group = {"evpl": 2, "epl": 3} |
|
20
|
|
|
|
|
21
|
1 |
|
def build_int_flows( |
|
22
|
|
|
self, |
|
23
|
|
|
evcs: dict[str, dict], |
|
24
|
|
|
stored_flows: dict[int, list[dict]], |
|
25
|
|
|
) -> dict[int, list[dict]]: |
|
26
|
|
|
"""build INT flows. |
|
27
|
|
|
|
|
28
|
|
|
It'll map and create all INT flows needed, for now since each EVC |
|
29
|
|
|
is bidirectional, it'll provision bidirectionally too. In the future, |
|
30
|
|
|
if mef_eline supports unidirectional EVC, it'll follow suit accordingly. |
|
31
|
|
|
""" |
|
32
|
1 |
|
flows_per_cookie: dict[int, list[dict]] = defaultdict(list) |
|
33
|
1 |
|
for evc_id, evc in evcs.items(): |
|
34
|
1 |
|
for flow in itertools.chain( |
|
35
|
|
|
self._build_int_source_flows("uni_a", evc, stored_flows), |
|
36
|
|
|
self._build_int_source_flows("uni_z", evc, stored_flows), |
|
37
|
|
|
self._build_int_hop_flows(evc, stored_flows), |
|
38
|
|
|
self._build_int_sink_flows("uni_z", evc, stored_flows), |
|
39
|
|
|
self._build_int_sink_flows("uni_a", evc, stored_flows), |
|
40
|
|
|
): |
|
41
|
1 |
|
cookie = utils.get_cookie(evc_id, settings.MEF_COOKIE_PREFIX) |
|
42
|
1 |
|
flows_per_cookie[cookie].append(flow) |
|
43
|
1 |
|
return flows_per_cookie |
|
44
|
|
|
|
|
45
|
1 |
|
def _build_int_source_flows( |
|
46
|
|
|
self, |
|
47
|
|
|
uni_src_key: Literal["uni_a", "uni_z"], |
|
48
|
|
|
evc: dict, |
|
49
|
|
|
stored_flows: dict[int, list[dict]], |
|
50
|
|
|
) -> list[dict]: |
|
51
|
|
|
"""Build INT source flows. |
|
52
|
|
|
|
|
53
|
|
|
At the INT source, one flow becomes 3: one for UDP on table 0, |
|
54
|
|
|
one for TCP on table 0, and one on table X (2 for evpl and 3 for epl by default) |
|
55
|
|
|
On table 0, we use just new instructions: push_int and goto_table |
|
56
|
|
|
On table X, we add add_int_metadata before the original actions |
|
57
|
|
|
INT flows will have higher priority. |
|
58
|
|
|
""" |
|
59
|
1 |
|
new_flows = [] |
|
60
|
1 |
|
new_int_flow_tbl_0_tcp = {} |
|
61
|
1 |
|
src_uni = evc[uni_src_key] |
|
62
|
|
|
|
|
63
|
|
|
# Get the original flows |
|
64
|
1 |
|
dpid = src_uni["switch"] |
|
65
|
1 |
|
for flow in stored_flows[ |
|
66
|
|
|
utils.get_cookie(evc["id"], settings.MEF_COOKIE_PREFIX) |
|
67
|
|
|
]: |
|
68
|
1 |
|
if ( |
|
69
|
|
|
flow["switch"] == dpid |
|
70
|
|
|
and flow["flow"]["match"]["in_port"] == src_uni["port_number"] |
|
71
|
|
|
): |
|
72
|
1 |
|
new_int_flow_tbl_0_tcp = copy.deepcopy(flow) |
|
73
|
1 |
|
break |
|
74
|
|
|
|
|
75
|
1 |
|
if not new_int_flow_tbl_0_tcp: |
|
76
|
1 |
|
if not evc["active"]: |
|
77
|
1 |
|
return [] |
|
78
|
1 |
|
raise FlowsNotFound(evc["id"]) |
|
79
|
|
|
|
|
80
|
1 |
|
utils.set_instructions_from_actions(new_int_flow_tbl_0_tcp) |
|
81
|
1 |
|
utils.set_new_cookie(new_int_flow_tbl_0_tcp) |
|
82
|
1 |
|
utils.set_owner(new_int_flow_tbl_0_tcp) |
|
83
|
|
|
|
|
84
|
|
|
# Deepcopy to use for table X (2 or 3 by default for EVPL or EPL respectively) |
|
85
|
1 |
|
new_int_flow_tbl_x = copy.deepcopy(new_int_flow_tbl_0_tcp) |
|
86
|
|
|
|
|
87
|
|
|
# Prepare TCP Flow for Table 0 |
|
88
|
1 |
|
new_int_flow_tbl_0_tcp["flow"]["match"]["dl_type"] = settings.IPv4 |
|
89
|
1 |
|
new_int_flow_tbl_0_tcp["flow"]["match"]["nw_proto"] = settings.TCP |
|
90
|
1 |
|
utils.set_priority(new_int_flow_tbl_0_tcp) |
|
91
|
|
|
|
|
92
|
|
|
# The flow_manager has two outputs: instructions and actions. |
|
93
|
1 |
|
table_group = self.table_group |
|
94
|
1 |
|
new_table_id = table_group[new_int_flow_tbl_x["flow"]["table_group"]] |
|
95
|
1 |
|
instructions = [ |
|
96
|
|
|
{ |
|
97
|
|
|
"instruction_type": "apply_actions", |
|
98
|
|
|
"actions": [{"action_type": "push_int"}], |
|
99
|
|
|
}, |
|
100
|
|
|
{"instruction_type": "goto_table", "table_id": new_table_id}, |
|
101
|
|
|
] |
|
102
|
1 |
|
new_int_flow_tbl_0_tcp["flow"]["instructions"] = instructions |
|
103
|
|
|
|
|
104
|
|
|
# Prepare UDP Flow for Table 0. Everything the same as TCP except the nw_proto |
|
105
|
1 |
|
new_int_flow_tbl_0_udp = copy.deepcopy(new_int_flow_tbl_0_tcp) |
|
106
|
1 |
|
new_int_flow_tbl_0_udp["flow"]["match"]["nw_proto"] = settings.UDP |
|
107
|
|
|
|
|
108
|
|
|
# Prepare Flows for Table X - No TCP or UDP specifics |
|
109
|
1 |
|
new_int_flow_tbl_x["flow"]["table_id"] = new_table_id |
|
110
|
|
|
|
|
111
|
|
|
# if intra-switch EVC, then output port should be the dst UNI's source port |
|
112
|
1 |
|
if utils.is_intra_switch_evc(evc): |
|
113
|
1 |
|
dst_uni = evc["uni_z" if uni_src_key == "uni_a" else "uni_a"] |
|
114
|
1 |
|
proxy_port = dst_uni["proxy_port"] |
|
115
|
1 |
|
for instruction in new_int_flow_tbl_x["flow"]["instructions"]: |
|
116
|
1 |
|
if instruction["instruction_type"] == "apply_actions": |
|
117
|
1 |
|
for action in instruction["actions"]: |
|
118
|
1 |
|
if action["action_type"] == "output": |
|
119
|
|
|
# Since this is the INT Source, we use source |
|
120
|
|
|
# to avoid worrying about single or multi |
|
121
|
|
|
# home physical loops. |
|
122
|
|
|
# The choice for destination is at the INT Sink. |
|
123
|
1 |
|
action["port"] = proxy_port.source.port_number |
|
124
|
|
|
|
|
125
|
|
|
# remove set_vlan action if it exists, this is for |
|
126
|
|
|
# avoding a redundant set_vlan since it'll be set in the egress sink |
|
127
|
1 |
|
instruction["actions"] = utils.modify_actions( |
|
128
|
|
|
instruction["actions"], ["set_vlan"], remove=True |
|
129
|
|
|
) |
|
130
|
|
|
|
|
131
|
1 |
|
instructions = utils.add_to_apply_actions( |
|
132
|
|
|
new_int_flow_tbl_x["flow"]["instructions"], |
|
133
|
|
|
new_instruction={"action_type": "add_int_metadata"}, |
|
134
|
|
|
position=0, |
|
135
|
|
|
) |
|
136
|
|
|
|
|
137
|
1 |
|
new_int_flow_tbl_x["flow"]["instructions"] = instructions |
|
138
|
|
|
|
|
139
|
1 |
|
new_flows.append(new_int_flow_tbl_0_tcp) |
|
140
|
1 |
|
new_flows.append(new_int_flow_tbl_0_udp) |
|
141
|
1 |
|
new_flows.append(new_int_flow_tbl_x) |
|
142
|
|
|
|
|
143
|
1 |
|
return new_flows |
|
144
|
|
|
|
|
145
|
1 |
|
def _build_int_hop_flows( |
|
146
|
|
|
self, |
|
147
|
|
|
evc: dict, |
|
148
|
|
|
stored_flows: dict[int, list[dict]], |
|
149
|
|
|
) -> list[dict]: |
|
150
|
|
|
"""Build INT hop flows. |
|
151
|
|
|
|
|
152
|
|
|
At the INT hops, one flow adds two more: one for UDP on table 0, |
|
153
|
|
|
one for TCP on table 0. On table 0, we add 'add_int_metadata' |
|
154
|
|
|
before other actions. |
|
155
|
|
|
""" |
|
156
|
|
|
|
|
157
|
1 |
|
new_flows = [] |
|
158
|
1 |
|
excluded_dpids = set([evc["uni_a"]["switch"], evc["uni_z"]["switch"]]) |
|
159
|
|
|
|
|
160
|
1 |
|
for flow in stored_flows[ |
|
161
|
|
|
utils.get_cookie(evc["id"], settings.MEF_COOKIE_PREFIX) |
|
162
|
|
|
]: |
|
163
|
1 |
|
if flow["switch"] in excluded_dpids: |
|
164
|
1 |
|
continue |
|
165
|
1 |
|
if "match" not in flow["flow"] or "in_port" not in flow["flow"]["match"]: |
|
166
|
|
|
continue |
|
167
|
|
|
|
|
168
|
1 |
|
new_int_flow_tbl_0_tcp = copy.deepcopy(flow) |
|
169
|
1 |
|
utils.set_instructions_from_actions(new_int_flow_tbl_0_tcp) |
|
170
|
1 |
|
utils.set_new_cookie(new_int_flow_tbl_0_tcp) |
|
171
|
1 |
|
utils.set_owner(new_int_flow_tbl_0_tcp) |
|
172
|
|
|
|
|
173
|
|
|
# Prepare TCP Flow |
|
174
|
1 |
|
new_int_flow_tbl_0_tcp["flow"]["match"]["dl_type"] = settings.IPv4 |
|
175
|
1 |
|
new_int_flow_tbl_0_tcp["flow"]["match"]["nw_proto"] = settings.TCP |
|
176
|
1 |
|
utils.set_priority(new_int_flow_tbl_0_tcp) |
|
177
|
|
|
|
|
178
|
1 |
|
for instruction in new_int_flow_tbl_0_tcp["flow"]["instructions"]: |
|
179
|
1 |
|
if instruction["instruction_type"] == "apply_actions": |
|
180
|
1 |
|
instruction["actions"].insert( |
|
181
|
|
|
0, {"action_type": "add_int_metadata"} |
|
182
|
|
|
) |
|
183
|
|
|
|
|
184
|
|
|
# Prepare UDP Flow |
|
185
|
1 |
|
new_int_flow_tbl_0_udp = copy.deepcopy(new_int_flow_tbl_0_tcp) |
|
186
|
1 |
|
new_int_flow_tbl_0_udp["flow"]["match"]["nw_proto"] = settings.UDP |
|
187
|
|
|
|
|
188
|
1 |
|
new_flows.append(new_int_flow_tbl_0_tcp) |
|
189
|
1 |
|
new_flows.append(new_int_flow_tbl_0_udp) |
|
190
|
|
|
|
|
191
|
1 |
|
return new_flows |
|
192
|
|
|
|
|
193
|
1 |
|
def _build_int_sink_flows( |
|
194
|
|
|
self, |
|
195
|
|
|
uni_dst_key: Literal["uni_a", "uni_z"], |
|
196
|
|
|
evc: dict, |
|
197
|
|
|
stored_flows: dict[int, list[dict]], |
|
198
|
|
|
) -> list[dict]: |
|
199
|
|
|
""" |
|
200
|
|
|
Build INT sink flows. |
|
201
|
|
|
|
|
202
|
|
|
At the INT sink, one flow becomes many: |
|
203
|
|
|
1. Before the proxy, we do add_int_metadata as an INT hop. |
|
204
|
|
|
We need to keep the set_queue |
|
205
|
|
|
2. After the proxy, we do send_report and pop_int and output |
|
206
|
|
|
We only use table 0 for #1. |
|
207
|
|
|
We use table X (2 or 3) for #2. for pop_int and output |
|
208
|
|
|
""" |
|
209
|
1 |
|
new_flows = [] |
|
210
|
1 |
|
dst_uni = evc[uni_dst_key] |
|
211
|
1 |
|
proxy_port = dst_uni["proxy_port"] |
|
212
|
1 |
|
dpid = dst_uni["switch"] |
|
213
|
|
|
|
|
214
|
1 |
|
for flow in stored_flows[ |
|
215
|
|
|
utils.get_cookie(evc["id"], settings.MEF_COOKIE_PREFIX) |
|
216
|
|
|
]: |
|
217
|
|
|
# Only consider this sink's dpid flows |
|
218
|
1 |
|
if flow["switch"] != dpid: |
|
219
|
1 |
|
continue |
|
220
|
|
|
# Only consider flows coming from NNI interfaces |
|
221
|
1 |
|
if flow["flow"]["match"]["in_port"] == dst_uni["port_number"]: |
|
222
|
1 |
|
continue |
|
223
|
|
|
|
|
224
|
1 |
|
new_int_flow_tbl_0_tcp = copy.deepcopy(flow) |
|
225
|
|
|
|
|
226
|
1 |
|
if not new_int_flow_tbl_0_tcp: |
|
227
|
|
|
if not evc["active"]: |
|
228
|
|
|
return [] |
|
229
|
|
|
raise FlowsNotFound(evc["id"]) |
|
230
|
|
|
|
|
231
|
1 |
|
utils.set_new_cookie(new_int_flow_tbl_0_tcp) |
|
232
|
1 |
|
utils.set_owner(new_int_flow_tbl_0_tcp) |
|
233
|
1 |
|
utils.set_instructions_from_actions(new_int_flow_tbl_0_tcp) |
|
234
|
|
|
|
|
235
|
|
|
# Save for pos-proxy flows |
|
236
|
1 |
|
new_int_flow_tbl_0_pos = copy.deepcopy(new_int_flow_tbl_0_tcp) |
|
237
|
1 |
|
new_int_flow_tbl_x_pos = copy.deepcopy(new_int_flow_tbl_0_tcp) |
|
238
|
|
|
|
|
239
|
|
|
# Prepare TCP Flow for Table 0 PRE proxy |
|
240
|
1 |
|
if not utils.is_intra_switch_evc(evc): |
|
241
|
1 |
|
new_int_flow_tbl_0_tcp["flow"]["match"]["dl_type"] = settings.IPv4 |
|
242
|
1 |
|
new_int_flow_tbl_0_tcp["flow"]["match"]["nw_proto"] = settings.TCP |
|
243
|
1 |
|
utils.set_priority(new_int_flow_tbl_0_tcp) |
|
244
|
|
|
|
|
245
|
|
|
# Add telemetry, keep set_queue, output to the proxy port. |
|
246
|
1 |
|
output_port_no = proxy_port.source.port_number |
|
247
|
1 |
|
for instruction in new_int_flow_tbl_0_tcp["flow"]["instructions"]: |
|
248
|
1 |
|
if instruction["instruction_type"] == "apply_actions": |
|
249
|
|
|
# Keep set_queue |
|
250
|
1 |
|
actions = utils.modify_actions( |
|
251
|
|
|
instruction["actions"], |
|
252
|
|
|
["pop_vlan", "push_vlan", "set_vlan", "output"], |
|
253
|
|
|
remove=True, |
|
254
|
|
|
) |
|
255
|
1 |
|
actions.insert(0, {"action_type": "add_int_metadata"}) |
|
256
|
1 |
|
actions.append( |
|
257
|
|
|
{"action_type": "output", "port": output_port_no} |
|
258
|
|
|
) |
|
259
|
1 |
|
instruction["actions"] = actions |
|
260
|
|
|
|
|
261
|
|
|
# Prepare UDP Flow for Table 0 |
|
262
|
1 |
|
new_int_flow_tbl_0_udp = copy.deepcopy(new_int_flow_tbl_0_tcp) |
|
263
|
1 |
|
new_int_flow_tbl_0_udp["flow"]["match"]["nw_proto"] = settings.UDP |
|
264
|
|
|
|
|
265
|
1 |
|
new_flows.append(copy.deepcopy(new_int_flow_tbl_0_tcp)) |
|
266
|
1 |
|
new_flows.append(copy.deepcopy(new_int_flow_tbl_0_udp)) |
|
267
|
|
|
|
|
268
|
|
|
# Prepare Flows for Table 0 AFTER proxy. No difference between TCP or UDP |
|
269
|
1 |
|
in_port_no = proxy_port.destination.port_number |
|
270
|
|
|
|
|
271
|
1 |
|
new_int_flow_tbl_0_pos["flow"]["match"]["in_port"] = in_port_no |
|
272
|
1 |
|
utils.set_priority(new_int_flow_tbl_0_tcp) |
|
273
|
|
|
|
|
274
|
1 |
|
table_group = self.table_group |
|
275
|
1 |
|
new_table_id = table_group[new_int_flow_tbl_x_pos["flow"]["table_group"]] |
|
276
|
1 |
|
instructions = [ |
|
277
|
|
|
{ |
|
278
|
|
|
"instruction_type": "apply_actions", |
|
279
|
|
|
"actions": [{"action_type": "send_report"}], |
|
280
|
|
|
}, |
|
281
|
|
|
{ |
|
282
|
|
|
"instruction_type": "goto_table", |
|
283
|
|
|
"table_id": new_table_id, |
|
284
|
|
|
}, |
|
285
|
|
|
] |
|
286
|
1 |
|
new_int_flow_tbl_0_pos["flow"]["instructions"] = instructions |
|
287
|
|
|
|
|
288
|
|
|
# Prepare Flows for Table X POS proxy |
|
289
|
1 |
|
new_int_flow_tbl_x_pos["flow"]["match"]["in_port"] = in_port_no |
|
290
|
1 |
|
new_int_flow_tbl_x_pos["flow"]["table_id"] = new_table_id |
|
291
|
|
|
|
|
292
|
1 |
|
for instruction in new_int_flow_tbl_x_pos["flow"]["instructions"]: |
|
293
|
1 |
|
if instruction["instruction_type"] == "apply_actions": |
|
294
|
1 |
|
instruction["actions"].insert(0, {"action_type": "pop_int"}) |
|
295
|
|
|
|
|
296
|
1 |
|
new_flows.append(copy.deepcopy(new_int_flow_tbl_0_pos)) |
|
297
|
1 |
|
new_flows.append(copy.deepcopy(new_int_flow_tbl_x_pos)) |
|
298
|
|
|
|
|
299
|
|
|
return new_flows |
|
300
|
|
|
|
kytos-ng /
telemetry_int
