build.managers.flow_builder.FlowBuilder._build_int_sink_flows() - Code Metrics - Inspection of "Merge pull request #88 from kytos-ng/fix/install_n..." - kytos-ng/telemetry_int - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 03a8ab...fb285f )

by Vinicius

created 2024-04-25 16:42 UTC

FlowBuilder._build_int_sink_flows() D

↳ Parent: build.managers.flow_builder

Complexity

Conditions

Size

Total Lines	107
Code Lines	63

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	47
CRAP Score	11.0261

Importance

Changes

Metric	Value
cc	11
eloc	63
nop	4
dl	0
loc	107
ccs	47
cts	50
cp	0.94
crap	11.0261
rs	4.9909
c	0
b	0
f	0

How to fix Long Method Complexity

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

If many parameters/temporary variables are present:
- Replace temporary variables with Query
- Introduce parameter object; often combined with preserve whole object
- If the above two are insufficient: Replace method with method object
If you have long conditionals: Decompose Conditional
Otherwise: Extract method

Complexity

Complex classes like build.managers.flow_builder.FlowBuilder._build_int_sink_flows() often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

"""flow_builder module responsible for building and mapping flows."""

import copy
from collections import defaultdict
import itertools

from typing import Literal

from napps.kytos.telemetry_int import utils
from napps.kytos.telemetry_int.exceptions import FlowsNotFound
from napps.kytos.telemetry_int import settings


class FlowBuilder:
    """FlowBuilder."""

    def __init__(self):
        """Constructor of FlowBuilder."""
        self.table_group = {"evpl": 2, "epl": 3}

    def build_int_flows(
        self,
        evcs: dict[str, dict],
        stored_flows: dict[int, list[dict]],
    ) -> dict[int, list[dict]]:
        """build INT flows.

        It'll map and create all INT flows needed, for now since each EVC
        is bidirectional, it'll provision bidirectionally too. In the future,
        if mef_eline supports unidirectional EVC, it'll follow suit accordingly.
        """
        flows_per_cookie: dict[int, list[dict]] = defaultdict(list)
        for evc_id, evc in evcs.items():
            for flow in itertools.chain(
                self._build_int_source_flows("uni_a", evc, stored_flows),
                self._build_int_source_flows("uni_z", evc, stored_flows),
                self._build_int_hop_flows(evc, stored_flows),
                self._build_int_sink_flows("uni_z", evc, stored_flows),
                self._build_int_sink_flows("uni_a", evc, stored_flows),
            ):
                cookie = utils.get_cookie(evc_id, settings.MEF_COOKIE_PREFIX)
                flows_per_cookie[cookie].append(flow)
        return flows_per_cookie

    def _build_int_source_flows(
        self,
        uni_src_key: Literal["uni_a", "uni_z"],
        evc: dict,
        stored_flows: dict[int, list[dict]],
    ) -> list[dict]:
        """Build INT source flows.

        At the INT source, one flow becomes 3: one for UDP on table 0,
        one for TCP on table 0, and one on table X (2 for evpl and 3 for epl by default)
        On table 0, we use just new instructions: push_int and goto_table
        On table X, we add add_int_metadata before the original actions
        INT flows will have higher priority.
        """
        new_flows = []
        new_int_flow_tbl_0_tcp = {}
        src_uni = evc[uni_src_key]

        # Get the original flows
        dpid = src_uni["switch"]
        for flow in stored_flows[
            utils.get_cookie(evc["id"], settings.MEF_COOKIE_PREFIX)
        ]:
            if (
                flow["switch"] == dpid
                and flow["flow"]["match"]["in_port"] == src_uni["port_number"]
            ):
                new_int_flow_tbl_0_tcp = copy.deepcopy(flow)
                break

        if not new_int_flow_tbl_0_tcp:
            if not evc["active"]:
                return []
            raise FlowsNotFound(evc["id"])

        utils.set_instructions_from_actions(new_int_flow_tbl_0_tcp)
        utils.set_new_cookie(new_int_flow_tbl_0_tcp)
        utils.set_owner(new_int_flow_tbl_0_tcp)

        # Deepcopy to use for table X (2 or 3 by default for EVPL or EPL respectively)
        new_int_flow_tbl_x = copy.deepcopy(new_int_flow_tbl_0_tcp)

        # Prepare TCP Flow for Table 0
        new_int_flow_tbl_0_tcp["flow"]["match"]["dl_type"] = settings.IPv4
        new_int_flow_tbl_0_tcp["flow"]["match"]["nw_proto"] = settings.TCP
        utils.set_priority(new_int_flow_tbl_0_tcp)

        # The flow_manager has two outputs: instructions and actions.
        table_group = self.table_group
        new_table_id = table_group[new_int_flow_tbl_x["flow"]["table_group"]]
        instructions = [
            {
                "instruction_type": "apply_actions",
                "actions": [{"action_type": "push_int"}],
            },
            {"instruction_type": "goto_table", "table_id": new_table_id},
        ]
        new_int_flow_tbl_0_tcp["flow"]["instructions"] = instructions

        # Prepare UDP Flow for Table 0. Everything the same as TCP except the nw_proto
        new_int_flow_tbl_0_udp = copy.deepcopy(new_int_flow_tbl_0_tcp)
        new_int_flow_tbl_0_udp["flow"]["match"]["nw_proto"] = settings.UDP

        # Prepare Flows for Table X - No TCP or UDP specifics
        new_int_flow_tbl_x["flow"]["table_id"] = new_table_id

        # if intra-switch EVC, then output port should be the dst UNI's source port
        if utils.is_intra_switch_evc(evc):
            dst_uni = evc["uni_z" if uni_src_key == "uni_a" else "uni_a"]
            proxy_port = dst_uni["proxy_port"]
            for instruction in new_int_flow_tbl_x["flow"]["instructions"]:
                if instruction["instruction_type"] == "apply_actions":
                    for action in instruction["actions"]:
                        if action["action_type"] == "output":
                            # Since this is the INT Source, we use source
                            # to avoid worrying about single or multi
                            # home physical loops.
                            # The choice for destination is at the INT Sink.
                            action["port"] = proxy_port.source.port_number

                    # remove set_vlan action if it exists, this is for
                    # avoding a redundant set_vlan since it'll be set in the egress sink
                    instruction["actions"] = utils.modify_actions(
                        instruction["actions"], ["set_vlan"], remove=True
                    )

        instructions = utils.add_to_apply_actions(
            new_int_flow_tbl_x["flow"]["instructions"],
            new_instruction={"action_type": "add_int_metadata"},
            position=0,
        )

        new_int_flow_tbl_x["flow"]["instructions"] = instructions

        new_flows.append(new_int_flow_tbl_0_tcp)
        new_flows.append(new_int_flow_tbl_0_udp)
        new_flows.append(new_int_flow_tbl_x)

        return new_flows

    def _build_int_hop_flows(
        self,
        evc: dict,
        stored_flows: dict[int, list[dict]],
    ) -> list[dict]:
        """Build INT hop flows.

        At the INT hops, one flow adds two more: one for UDP on table 0,
        one for TCP on table 0. On table 0, we add 'add_int_metadata'
        before other actions.
        """

        new_flows = []
        excluded_dpids = set([evc["uni_a"]["switch"], evc["uni_z"]["switch"]])

        for flow in stored_flows[
            utils.get_cookie(evc["id"], settings.MEF_COOKIE_PREFIX)
        ]:
            if flow["switch"] in excluded_dpids:
                continue
            if "match" not in flow["flow"] or "in_port" not in flow["flow"]["match"]:
                continue

            new_int_flow_tbl_0_tcp = copy.deepcopy(flow)
            utils.set_instructions_from_actions(new_int_flow_tbl_0_tcp)
            utils.set_new_cookie(new_int_flow_tbl_0_tcp)
            utils.set_owner(new_int_flow_tbl_0_tcp)

            # Prepare TCP Flow
            new_int_flow_tbl_0_tcp["flow"]["match"]["dl_type"] = settings.IPv4
            new_int_flow_tbl_0_tcp["flow"]["match"]["nw_proto"] = settings.TCP
            utils.set_priority(new_int_flow_tbl_0_tcp)

            for instruction in new_int_flow_tbl_0_tcp["flow"]["instructions"]:
                if instruction["instruction_type"] == "apply_actions":
                    instruction["actions"].insert(
                        0, {"action_type": "add_int_metadata"}
                    )

            # Prepare UDP Flow
            new_int_flow_tbl_0_udp = copy.deepcopy(new_int_flow_tbl_0_tcp)
            new_int_flow_tbl_0_udp["flow"]["match"]["nw_proto"] = settings.UDP

            new_flows.append(new_int_flow_tbl_0_tcp)
            new_flows.append(new_int_flow_tbl_0_udp)

        return new_flows

    def _build_int_sink_flows(
        self,
        uni_dst_key: Literal["uni_a", "uni_z"],
        evc: dict,
        stored_flows: dict[int, list[dict]],
    ) -> list[dict]:
        """
        Build INT sink flows.

        At the INT sink, one flow becomes many:
        1. Before the proxy, we do add_int_metadata as an INT hop.
        We need to keep the set_queue
        2. After the proxy, we do send_report and pop_int and output
        We only use table 0 for #1.
        We use table X (2 or 3) for #2. for pop_int and output
        """
        new_flows = []
        dst_uni = evc[uni_dst_key]
        proxy_port = dst_uni["proxy_port"]
        dpid = dst_uni["switch"]

        for flow in stored_flows[
            utils.get_cookie(evc["id"], settings.MEF_COOKIE_PREFIX)
        ]:
            # Only consider this sink's dpid flows
            if flow["switch"] != dpid:
                continue
            # Only consider flows coming from NNI interfaces
            if flow["flow"]["match"]["in_port"] == dst_uni["port_number"]:
                continue

            new_int_flow_tbl_0_tcp = copy.deepcopy(flow)

            if not new_int_flow_tbl_0_tcp:
                if not evc["active"]:
                    return []
                raise FlowsNotFound(evc["id"])

            utils.set_new_cookie(new_int_flow_tbl_0_tcp)
            utils.set_owner(new_int_flow_tbl_0_tcp)
            utils.set_instructions_from_actions(new_int_flow_tbl_0_tcp)

            # Save for pos-proxy flows
            new_int_flow_tbl_0_pos = copy.deepcopy(new_int_flow_tbl_0_tcp)
            new_int_flow_tbl_x_pos = copy.deepcopy(new_int_flow_tbl_0_tcp)

            # Prepare TCP Flow for Table 0 PRE proxy
            if not utils.is_intra_switch_evc(evc):
                new_int_flow_tbl_0_tcp["flow"]["match"]["dl_type"] = settings.IPv4
                new_int_flow_tbl_0_tcp["flow"]["match"]["nw_proto"] = settings.TCP
                utils.set_priority(new_int_flow_tbl_0_tcp)

                # Add telemetry, keep set_queue, output to the proxy port.
                output_port_no = proxy_port.source.port_number
                for instruction in new_int_flow_tbl_0_tcp["flow"]["instructions"]:
                    if instruction["instruction_type"] == "apply_actions":
                        # Keep set_queue
                        actions = utils.modify_actions(
                            instruction["actions"],
                            ["pop_vlan", "push_vlan", "set_vlan", "output"],
                            remove=True,
                        )
                        actions.insert(0, {"action_type": "add_int_metadata"})
                        actions.append(
                            {"action_type": "output", "port": output_port_no}
                        )
                        instruction["actions"] = actions

                # Prepare UDP Flow for Table 0
                new_int_flow_tbl_0_udp = copy.deepcopy(new_int_flow_tbl_0_tcp)
                new_int_flow_tbl_0_udp["flow"]["match"]["nw_proto"] = settings.UDP

                new_flows.append(copy.deepcopy(new_int_flow_tbl_0_tcp))
                new_flows.append(copy.deepcopy(new_int_flow_tbl_0_udp))

            # Prepare Flows for Table 0 AFTER proxy. No difference between TCP or UDP
            in_port_no = proxy_port.destination.port_number

            new_int_flow_tbl_0_pos["flow"]["match"]["in_port"] = in_port_no
            utils.set_priority(new_int_flow_tbl_0_tcp)

            table_group = self.table_group
            new_table_id = table_group[new_int_flow_tbl_x_pos["flow"]["table_group"]]
            instructions = [
                {
                    "instruction_type": "apply_actions",
                    "actions": [{"action_type": "send_report"}],
                },
                {
                    "instruction_type": "goto_table",
                    "table_id": new_table_id,
                },
            ]
            new_int_flow_tbl_0_pos["flow"]["instructions"] = instructions

            # Prepare Flows for Table X POS proxy
            new_int_flow_tbl_x_pos["flow"]["match"]["in_port"] = in_port_no
            new_int_flow_tbl_x_pos["flow"]["table_id"] = new_table_id

            for instruction in new_int_flow_tbl_x_pos["flow"]["instructions"]:
                if instruction["instruction_type"] == "apply_actions":
                    instruction["actions"].insert(0, {"action_type": "pop_int"})

            new_flows.append(copy.deepcopy(new_int_flow_tbl_0_pos))
            new_flows.append(copy.deepcopy(new_int_flow_tbl_x_pos))

        return new_flows


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

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FlowBuilder._build_int_sink_flows() D

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