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#
# (c) 2016 Red Hat Inc.
#
# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import absolute_import, division, print_function
__metaclass__ = type
import json
import re
from ansible.errors import AnsibleConnectionFailure
from ansible.module_utils._text import to_bytes, to_text
from ansible.utils.display import Display
from ansible_collections.ansible.netcommon.plugins.plugin_utils.terminal_base import TerminalBase
display = Display()
class TerminalModule(TerminalBase):
terminal_stdout_re = [re.compile(rb"[\r\n]?[\w\+\-\.:\/\[\]]+(?:\([^\)]+\)){0,3}(?:[>#]) ?$")]
privilege_level_re = re.compile(r"Current privilege level is (\d+)$")
terminal_stderr_re = [
re.compile(rb"% ?Error"),
# re.compile(rb"^% \w+", re.M),
re.compile(rb"% ?Bad secret"),
re.compile(rb"[\r\n%] Bad passwords"),
re.compile(rb"invalid input", re.I),
re.compile(rb"(?:incomplete|ambiguous) command", re.I),
re.compile(rb"connection timed out", re.I),
re.compile(rb"[^\r\n]+ not found"),
re.compile(rb"'[^']' +returned error code: ?\d+"),
re.compile(rb"Bad mask", re.I),
re.compile(rb"% ?(\S+) ?overlaps with ?(\S+)", re.I),
re.compile(rb"[%\S] ?Error: ?[\s]+", re.I),
re.compile(rb"[%\S] ?Informational: ?[\s]+", re.I),
re.compile(rb"Command authorization failed"),
re.compile(rb"Command Rejected: ?[\s]+", re.I),
re.compile(rb"% General session commands not allowed under the address family", re.I),
re.compile(rb"% BGP: Error initializing topology", re.I),
]
terminal_config_prompt = re.compile(r"^.+\(config(-.*)?\)#$")
def get_privilege_level(self):
try:
cmd = {"command": "show privilege"}
result = self._exec_cli_command(to_bytes(json.dumps(cmd), errors="surrogate_or_strict"))
except AnsibleConnectionFailure as e:
raise AnsibleConnectionFailure(
"unable to fetch privilege, with error: %s" % (e.message),
)
prompt = self.privilege_level_re.search(result)
if not prompt:
raise AnsibleConnectionFailure("unable to check privilege level [%s]" % result)
return int(prompt.group(1))
def on_open_shell(self):
_is_sdWan = False # initialize to false for default IOS execution
try:
self._exec_cli_command(b"terminal length 0")
except AnsibleConnectionFailure:
try:
self._exec_cli_command(b"screen-length 0") # support to SD-WAN mode
_is_sdWan = True
except AnsibleConnectionFailure: # fails as length required for handling prompt
raise AnsibleConnectionFailure("unable to set terminal parameters")
try:
if _is_sdWan:
self._exec_cli_command(b"screen-width 512") # support to SD-WAN mode
else:
self._exec_cli_command(b"terminal width 512")
try:
self._exec_cli_command(b"terminal width 0")
except AnsibleConnectionFailure:
pass
except AnsibleConnectionFailure:
display.display(
"WARNING: Unable to set terminal/screen width, command responses may be truncated",
)
def on_become(self, passwd=None):
if self._get_prompt().endswith(b"#") and self.get_privilege_level() == 15:
return
cmd = {"command": "enable"}
if passwd:
# Note: python-3.5 cannot combine u"" and r"" together. Thus make
# an r string and use to_text to ensure it's text on both py2 and py3.
cmd["prompt"] = to_text(r"[\r\n]?(?:.*)?[Pp]assword: ?$", errors="surrogate_or_strict")
cmd["answer"] = passwd
cmd["prompt_retry_check"] = True
try:
self._exec_cli_command(to_bytes(json.dumps(cmd), errors="surrogate_or_strict"))
prompt = self._get_prompt()
privilege_level = self.get_privilege_level()
except AnsibleConnectionFailure as e:
prompt = self._get_prompt()
raise AnsibleConnectionFailure(
"failed to elevate privilege to enable mode, at prompt [%s] with error: %s"
% (prompt, e.message),
)
if prompt is None or not prompt.endswith(b"#") or privilege_level != 15:
raise AnsibleConnectionFailure(
"failed to elevate privilege to enable mode, still at level [%d] and prompt [%s]"
% (privilege_level, prompt),
)
def on_unbecome(self):
prompt = self._get_prompt()
if prompt is None:
# if prompt is None most likely the terminal is hung up at a prompt
return
if self.get_privilege_level() != 15:
return
if b"(config" in prompt:
self._exec_cli_command(b"end")
self._exec_cli_command(b"disable")
elif prompt.endswith(b"#"):
self._exec_cli_command(b"disable")
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