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
|
#
# This code is part of Ansible, but is an independent component.
# This particular file snippet, and this file snippet only, is BSD licensed.
# Modules you write using this snippet, which is embedded dynamically by Ansible
# still belong to the author of the module, and may assign their own license
# to the complete work.
#
# (c) 2017 Red Hat Inc.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
import hashlib
import json
import socket
import struct
import traceback
import uuid
from functools import partial
from ansible.module_utils._text import to_bytes, to_text
from ansible.module_utils.common.json import AnsibleJSONEncoder
from ansible.module_utils.six import iteritems
from ansible.module_utils.six.moves import cPickle
def write_to_file_descriptor(fd, obj):
"""Handles making sure all data is properly written to file descriptor fd.
In particular, that data is encoded in a character stream-friendly way and
that all data gets written before returning.
"""
# Need to force a protocol that is compatible with both py2 and py3.
# That would be protocol=2 or less.
# Also need to force a protocol that excludes certain control chars as
# stdin in this case is a pty and control chars will cause problems.
# that means only protocol=0 will work.
src = cPickle.dumps(obj, protocol=0)
# raw \r characters will not survive pty round-trip
# They should be rehydrated on the receiving end
src = src.replace(b'\r', br'\r')
data_hash = to_bytes(hashlib.sha1(src).hexdigest())
os.write(fd, b'%d\n' % len(src))
os.write(fd, src)
os.write(fd, b'%s\n' % data_hash)
def send_data(s, data):
packed_len = struct.pack('!Q', len(data))
return s.sendall(packed_len + data)
def recv_data(s):
header_len = 8 # size of a packed unsigned long long
data = to_bytes("")
while len(data) < header_len:
d = s.recv(header_len - len(data))
if not d:
return None
data += d
data_len = struct.unpack('!Q', data[:header_len])[0]
data = data[header_len:]
while len(data) < data_len:
d = s.recv(data_len - len(data))
if not d:
return None
data += d
return data
def exec_command(module, command):
connection = Connection(module._socket_path)
try:
out = connection.exec_command(command)
except ConnectionError as exc:
code = getattr(exc, 'code', 1)
message = getattr(exc, 'err', exc)
return code, '', to_text(message, errors='surrogate_then_replace')
return 0, out, ''
def request_builder(method_, *args, **kwargs):
reqid = str(uuid.uuid4())
req = {'jsonrpc': '2.0', 'method': method_, 'id': reqid}
req['params'] = (args, kwargs)
return req
class ConnectionError(Exception):
def __init__(self, message, *args, **kwargs):
super(ConnectionError, self).__init__(message)
for k, v in iteritems(kwargs):
setattr(self, k, v)
class Connection(object):
def __init__(self, socket_path):
if socket_path is None:
raise AssertionError('socket_path must be a value')
self.socket_path = socket_path
def __getattr__(self, name):
try:
return self.__dict__[name]
except KeyError:
if name.startswith('_'):
raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, name))
return partial(self.__rpc__, name)
def _exec_jsonrpc(self, name, *args, **kwargs):
req = request_builder(name, *args, **kwargs)
reqid = req['id']
if not os.path.exists(self.socket_path):
raise ConnectionError(
'socket path %s does not exist or cannot be found. See Troubleshooting socket '
'path issues in the Network Debug and Troubleshooting Guide' % self.socket_path
)
try:
data = json.dumps(req, cls=AnsibleJSONEncoder, vault_to_text=True)
except TypeError as exc:
raise ConnectionError(
"Failed to encode some variables as JSON for communication with ansible-connection. "
"The original exception was: %s" % to_text(exc)
)
try:
out = self.send(data)
except socket.error as e:
raise ConnectionError(
'unable to connect to socket %s. See Troubleshooting socket path issues '
'in the Network Debug and Troubleshooting Guide' % self.socket_path,
err=to_text(e, errors='surrogate_then_replace'), exception=traceback.format_exc()
)
try:
response = json.loads(out)
except ValueError:
# set_option(s) has sensitive info, and the details are unlikely to matter anyway
if name.startswith("set_option"):
raise ConnectionError(
"Unable to decode JSON from response to {0}. Received '{1}'.".format(name, out)
)
params = [repr(arg) for arg in args] + ['{0}={1!r}'.format(k, v) for k, v in iteritems(kwargs)]
params = ', '.join(params)
raise ConnectionError(
"Unable to decode JSON from response to {0}({1}). Received '{2}'.".format(name, params, out)
)
if response['id'] != reqid:
raise ConnectionError('invalid json-rpc id received')
if "result_type" in response:
response["result"] = cPickle.loads(to_bytes(response["result"]))
return response
def __rpc__(self, name, *args, **kwargs):
"""Executes the json-rpc and returns the output received
from remote device.
:name: rpc method to be executed over connection plugin that implements jsonrpc 2.0
:args: Ordered list of params passed as arguments to rpc method
:kwargs: Dict of valid key, value pairs passed as arguments to rpc method
For usage refer the respective connection plugin docs.
"""
response = self._exec_jsonrpc(name, *args, **kwargs)
if 'error' in response:
err = response.get('error')
msg = err.get('data') or err['message']
code = err['code']
raise ConnectionError(to_text(msg, errors='surrogate_then_replace'), code=code)
return response['result']
def send(self, data):
try:
sf = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sf.connect(self.socket_path)
send_data(sf, to_bytes(data))
response = recv_data(sf)
except socket.error as e:
sf.close()
raise ConnectionError(
'unable to connect to socket %s. See the socket path issue category in '
'Network Debug and Troubleshooting Guide' % self.socket_path,
err=to_text(e, errors='surrogate_then_replace'), exception=traceback.format_exc()
)
sf.close()
return to_text(response, errors='surrogate_or_strict')
|
