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
|
#!/usr/bin/env python3
#
# (C) 2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
# All rights reserved.
#
# Author: Neels Hofmeyr <nhofmeyr@sysmocom.de>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
Run VTY test transcripts against a given application.
A VTY transcript contains VTY commands and their expected results.
It looks like:
"
OsmoHLR> enable
OsmoHLR# subscriber show imsi 123456789023000
% No subscriber for imsi = '123456789023000'
OsmoHLR# subscriber show msisdn 12345
% No subscriber for msisdn = '12345'
OsmoHLR# subscriber create imsi 123456789023000
% Created subscriber 123456789023000
ID: 1
IMSI: 123456789023000
MSISDN: none
No auth data
"
The application to be tested is described by
- a binary to run,
- command line arguments to pass to the binary,
- the VTY telnet port,
- the application name as printed in the VTY prompt.
This module can either be run directly to run or update a given VTY transcript,
or it can be imported as a module to run more complex setups.
'''
import re
from osmopy.osmo_verify_transcript_common import *
class InteractVty(Interact):
class VtyStep(Interact.StepBase):
expect_node = None # e.g. '(config-net)'
expect_prompt_char = None # '>' or '#'
def __init__(self, prompt):
super().__init__()
self.prompt = prompt
def verify_interact_state(self, interact_instance):
if interact_instance.update:
return
if interact_instance.this_node != self.expect_node:
raise Exception('Mismatch: expected VTY node %r in the prompt, got %r'
% (self.expect_node, interact_instance.this_node))
if interact_instance.this_prompt_char != self.expect_prompt_char:
raise Exception('Mismatch: expected VTY prompt character %r, got %r'
% (self.expect_prompt_char, interact_instance.this_prompt_char))
@staticmethod
def is_next_step(line, interact_instance):
m = interact_instance.re_prompt.match(line)
if not m:
return None
next_step = InteractVty.VtyStep(interact_instance.prompt)
next_step.expect_node = m.group(1)
next_step.expect_prompt_char = m.group(2)
next_step.command = m.group(3)
return next_step
def command_str(self, interact_instance=None):
if interact_instance is None:
node = self.expect_node
prompt_char = self.expect_prompt_char
else:
node = interact_instance.last_node
prompt_char = interact_instance.last_prompt_char
if node:
node = '(%s)' % node
node = node or ''
return '%s%s%s %s' % (self.prompt, node, prompt_char, self.command)
def __init__(self, prompt, port, host, verbose, update):
self.prompt = prompt
super().__init__(InteractVty.VtyStep, port, host, verbose, update)
def connect(self):
self.this_node = None
self.this_prompt_char = '>' # slight cheat for initial prompt char
self.last_node = None
self.last_prompt_char = None
super().connect()
# receive the first welcome message and discard
data = self.socket.recv(4096)
if not self.prompt:
b = data
b = b[b.rfind(b'\n') + 1:]
while b and (b[0] < ord('A') or b[0] > ord('z')):
b = b[1:]
prompt_str = b.decode('utf-8')
if '>' in prompt_str:
self.prompt = prompt_str[:prompt_str.find('>')]
if not self.prompt:
raise Exception('Could not find application name; needed to decode prompts.'
' Initial data was: %r' % data)
self.re_prompt = re.compile('^%s(?:\(([\w-]*)\))?([#>]) (.*)$' % self.prompt)
def _command(self, command_str, timeout=10):
self.socket.send(command_str.encode())
waited_since = time.time()
received_lines = []
last_line = ''
while True:
new_data = self.socket.recv(4096).decode('utf-8')
last_line = "%s%s" % (last_line, new_data)
if last_line:
lines = last_line.splitlines()
received_lines.extend(lines[:-1])
last_line = lines[-1]
match = self.re_prompt.match(last_line)
if not match:
if time.time() - waited_since > timeout:
raise IOError("Failed to read data (did the app crash?)")
time.sleep(.1)
continue
self.last_node = self.this_node
self.last_prompt_char = self.this_prompt_char
self.this_node = match.group(1) or None
self.this_prompt_char = match.group(2)
break
# expecting to have received the command we sent as echo, remove it
clean_command_str = command_str.strip()
if clean_command_str.endswith('?'):
clean_command_str = clean_command_str[:-1]
if received_lines and received_lines[0] == clean_command_str:
received_lines = received_lines[1:]
return received_lines
def command(self, command_str, timeout=10):
command_str = command_str or '\r'
if command_str[-1] not in '?\r\t':
command_str = command_str + '\r'
received_lines = self._command(command_str, timeout)
if command_str[-1] == '?':
self._command('\x03', timeout)
return received_lines
if __name__ == '__main__':
parser = common_parser()
parser.add_argument('-n', '--prompt-name', dest='prompt',
help="Name used in application's telnet VTY prompt."
" If omitted, will attempt to determine the name from"
" the initial VTY prompt.")
args = parser.parse_args()
interact = InteractVty(args.prompt, args.port, args.host, args.verbose, args.update)
main(command_str=args.command_str,
transcript_files=args.transcript_files,
interact=interact,
verbose=args.verbose)
# vim: tabstop=4 shiftwidth=4 expandtab nocin ai
|
