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
|
# Copyright (c) 2019 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.
"""Utilities to work with JSON data format from VAT."""
from robot.api import logger
from resources.libraries.python.parsers.JsonParser import JsonParser
class VatJsonUtil:
"""Utilities to work with JSON data format from VAT."""
@staticmethod
def _convert_mac_to_number_list(mac_address):
"""Convert MAC address string to list of decimal numbers.
Converts a ":" separated MAC address to decimal number list as used
in JSON interface dump.
:param mac_address: MAC address.
:type mac_address: str
:returns: List representation of MAC address.
:rtype: list
"""
list_mac = list()
for num in mac_address.split(u":"):
list_mac.append(int(num, 16))
return list_mac
@staticmethod
def get_vpp_interface_by_mac(interfaces_list, mac_address):
"""Return interface dictionary from interface_list by MAC address.
Extracts interface dictionary from all of the interfaces in interfaces
list parsed from JSON according to mac_address of the interface.
:param interfaces_list: Interfaces parsed from JSON.
:param mac_address: MAC address of interface we are looking for.
:type interfaces_list: dict
:type mac_address: str
:returns: Interface from JSON.
:rtype: dict
"""
interface_dict = dict()
list_mac_address = VatJsonUtil._convert_mac_to_number_list(mac_address)
logger.trace(
f"MAC address {mac_address} converted to list {list_mac_address}."
)
for interface in interfaces_list:
# TODO: create vat json integrity checking and move there
if u"l2_address" not in interface:
raise KeyError(
u"key l2_address not found in interface dict."
u"Probably input list is not parsed from correct VAT "
u"json output."
)
if u"l2_address_length" not in interface:
raise KeyError(
u"key l2_address_length not found in interface "
u"dict. Probably input list is not parsed from correct "
u"VAT json output."
)
mac_from_json = interface[u"l2_address"][:6]
if mac_from_json == list_mac_address:
if interface[u"l2_address_length"] != 6:
raise ValueError(u"l2_address_length value is not 6.")
interface_dict = interface
break
return interface_dict
@staticmethod
def update_vpp_interface_data_from_json(node, interface_dump_json):
"""Update vpp node data in node__DICT from JSON interface dump.
This method updates vpp interface names and sw if indexes according to
interface MAC addresses found in interface_dump_json.
:param node: Node dictionary.
:param interface_dump_json: JSON output from dump_interface_list VAT
command.
:type node: dict
:type interface_dump_json: str
"""
interface_list = JsonParser().parse_data(interface_dump_json)
for ifc in node[u"interfaces"].values():
if_mac = ifc[u"mac_address"]
interface_dict = VatJsonUtil.get_vpp_interface_by_mac(
interface_list, if_mac
)
if not interface_dict:
logger.trace(f"Interface {ifc} not found by MAC {if_mac}")
ifc[u"vpp_sw_index"] = None
continue
ifc[u"name"] = interface_dict[u"interface_name"]
ifc[u"vpp_sw_index"] = interface_dict[u"sw_if_index"]
ifc[u"mtu"] = interface_dict[u"mtu"]
@staticmethod
def get_interface_sw_index_from_json(interface_dump_json, interface_name):
"""Get sw_if_index from given JSON output by interface name.
:param interface_dump_json: JSON output from dump_interface_list VAT
command.
:param interface_name: Interface name.
:type interface_dump_json: str
:type interface_name: str
:returns: SW interface index.
:rtype: int
:raises ValueError: If interface not found in interface_dump_json.
"""
logger.trace(interface_dump_json)
interface_list = JsonParser().parse_data(interface_dump_json)
for interface in interface_list:
try:
if interface[u"interface_name"] == interface_name:
index = interface[u"sw_if_index"]
logger.debug(
f"Interface with name {interface_name} "
f"has sw_if_index {index}."
)
return index
except KeyError:
pass
raise ValueError(f"Interface with name {interface_name} not found.")
@staticmethod
def get_interface_name_from_json(interface_dump_json, sw_if_index):
"""Get interface name from given JSON output by sw_if_index.
:param interface_dump_json: JSON output from dump_interface_list VAT
command.
:param sw_if_index: SW interface index.
:type interface_dump_json: str
:type sw_if_index: int
:returns: Interface name.
:rtype: str
:raises ValueError: If interface not found in interface_dump_json.
"""
logger.trace(interface_dump_json)
interface_list = JsonParser().parse_data(interface_dump_json)
for interface in interface_list:
try:
if interface[u"sw_if_index"] == sw_if_index:
interface_name = interface[u"interface_name"]
logger.debug(
f"Interface with sw_if_index {sw_if_index} "
f"has name {interface_name}."
)
return interface_name
except KeyError:
pass
raise ValueError(f"Interface with sw_if_index {sw_if_index} not found.")
@staticmethod
def get_interface_mac_from_json(interface_dump_json, sw_if_index):
"""Get interface MAC address from given JSON output by sw_if_index.
:param interface_dump_json: JSON output from dump_interface_list VAT
command.
:param sw_if_index: SW interface index.
:type interface_dump_json: str
:type sw_if_index: int
:returns: Interface MAC address.
:rtype: str
:raises ValueError: If interface not found in interface_dump_json.
"""
logger.trace(interface_dump_json)
interface_list = JsonParser().parse_data(interface_dump_json)
for interface in interface_list:
try:
if interface[u"sw_if_index"] == sw_if_index:
mac_from_json = interface[u"l2_address"][:6] \
if u"l2_address" in list(interface.keys()) else u""
mac_address = u":".join(
f"{item:02x}" for item in mac_from_json
)
logger.debug(
f"Interface with sw_if_index {sw_if_index} "
f"has MAC address {mac_address}."
)
return mac_address
except KeyError:
pass
raise ValueError(f"Interface with sw_if_index {sw_if_index} not found.")
@staticmethod
def verify_vat_retval(vat_out, exp_retval=0, err_msg=u"VAT cmd failed"):
"""Verify return value of VAT command.
VAT command JSON output should be object (dict in python) or array. We
are looking for something like this: { "retval": 0 }. Verification is
skipped if VAT output does not contain return value element or root
elemet is array.
:param vat_out: VAT command output in python representation of JSON.
:param exp_retval: Expected return value (default 0).
:err_msg: Message to be displayed in case of error (optional).
:type vat_out: dict or list
:type exp_retval: int
:type err_msg: str
:raises RuntimeError: If VAT command return value is incorrect.
"""
if isinstance(vat_out, dict):
retval = vat_out.get(u"retval")
if retval is not None:
if retval != exp_retval:
raise RuntimeError(err_msg)
|
