Fixes #751 - IPv6 support for Cisco ASA 'show vpn-sessiondb anyconnect'

[smfeldman]

ISSUE TYPE

• Bugfix Pull Request

COMPONENT

Cisco ASA "show vpn session-db anyconnect"

SUMMARY

• Adjust template to support IPv6 addresses in command output:
  • Allow IPv6 Public IP address
  • Parse Assigned IPv6 line
• Add test files with IPv6 addresses
• Add the new assigned_ipv6 field to existing test output files

Before:

Python 3.7.4 (default, Sep  7 2019, 18:29:04)
[Clang 10.0.0 (clang-1000.11.45.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from ntc_templates.parse import parse_output
>>> from pprint import pprint
>>> with open("/tmp/cisco_asa_show_vpn-sessiondb_anyconnect_ipv6.raw", "r") as f:
...     data = f.read()
...
>>> pprint(parse_output(platform="cisco_asa", command="show vpn-sessiondb anyconnect", data=data))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/feldman/NetEng/asa-ip/ntc-templates/lib/ntc_templates/parse.py", line 35, in parse_output
    cli_table.ParseCmd(data, attrs)
  File "/Users/feldman/NetEng/asa-ip/venv/lib/python3.7/site-packages/textfsm/clitable.py", line 282, in ParseCmd
    self.table = self._ParseCmdItem(self.raw, template_file=template_files[0])
  File "/Users/feldman/NetEng/asa-ip/venv/lib/python3.7/site-packages/textfsm/clitable.py", line 315, in _ParseCmdItem
    for record in fsm.ParseText(cmd_input):
  File "/Users/feldman/NetEng/asa-ip/venv/lib/python3.7/site-packages/textfsm/parser.py", line 895, in ParseText
    self._CheckLine(line)
  File "/Users/feldman/NetEng/asa-ip/venv/lib/python3.7/site-packages/textfsm/parser.py", line 944, in _CheckLine
    if self._Operations(rule, line):
  File "/Users/feldman/NetEng/asa-ip/venv/lib/python3.7/site-packages/textfsm/parser.py", line 1025, in _Operations
    % (rule.line_num, line))
textfsm.parser.TextFSMError: State Error raised. Rule Line: 52. Input Line: Assigned IP  : 10.10.123.123          Public IP    : 2001:db8:91::7

After:

Python 3.7.4 (default, Sep  7 2019, 18:29:04)
[Clang 10.0.0 (clang-1000.11.45.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from ntc_templates.parse import parse_output
>>> from pprint import pprint
>>> with open("/tmp/cisco_asa_show_vpn-sessiondb_anyconnect_ipv6.raw", "r") as f:
...     data = f.read()
...
>>> pprint(parse_output(platform="cisco_asa", command="show vpn-sessiondb anyconnect", data=data))
[{'assigned_ip': '10.10.123.123',
  'assigned_ipv6': '2001:DB8:1234:1::5678',
  'audt_sess_id': '0a0edc05097bf0005ed99c3c',
  'bytes_rx': '58022385',
  'bytes_tx': '3145031268',
  'duration': '4h:55m:35s',
  'encryption': 'AnyConnect-Parent: (1)none  SSL-Tunnel: (1)AES-GCM-256  '
                'DTLS-Tunnel: (1)AES-GCM-256',
  'group_policy': 'RAVPN',
  'hashing': 'AnyConnect-Parent: (1)none  SSL-Tunnel: (1)SHA384  DTLS-Tunnel: '
             '(1)SHA384',
  'inactivity': '0h:00m:00s',
  'index': '38847',
  'license': 'AnyConnect Premium',
  'login_day': '5',
  'login_month': 'Jun',
  'login_time': '01:13:32',
  'login_time_zone': 'UTC',
  'login_weekday': 'Fri',
  'login_year': '2020',
  'protocol': 'AnyConnect-Parent SSL-Tunnel DTLS-Tunnel',
  'public_ip': '2001:db8:91::7',
  'security_grp': 'none',
  'session_type': 'AnyConnect',
  'tunnel_group': 'RAVPN',
  'username': 'johndoe12',
  'vlan': 'none',
  'vlan_mapping': 'N/A'}]