"Could not parse line:" error for Standard ACL entries containing 1 match.

[mitchell-foxworth]

ISSUE TYPE

• Bug Report

TEMPLATE USING

Value Required,Filldown ACL_TYPE (Standard|Extended)
Value Required,Filldown ACL_NAME (\S+)
Value LINE_NUM (\d+)
Value ACTION (permit|deny)
Value PROTOCOL (\S+)
Value SRC_HOST (\d+\.\d+\.\d+\.\d+)
Value SRC_ANY (any)
Value SRC_NETWORK (\d+\.\d+\.\d+\.\d+)
Value SRC_WILDCARD (\d+\.\d+\.\d+\.\d+)
Value SRC_PORT_MATCH (eq|neq|precedence|range|tos|lt|gt)
Value SRC_PORT ((?<!range\s).+?)
Value SRC_PORT_RANGE_START ((?<=range\s)\S+)
Value SRC_PORT_RANGE_END (\S+)
Value DST_HOST (\d+\.\d+\.\d+\.\d+)
Value DST_ANY (any)
Value DST_NETWORK (\d+\.\d+\.\d+\.\d+)
Value DST_WILDCARD (\d+\.\d+\.\d+\.\d+)
Value DST_PORT_MATCH (eq|neq|precedence|range|tos|lt|gt)
Value DST_PORT ((?<!range\s).+?)
Value DST_PORT_RANGE_START ((?<=range\s)\S+)
Value DST_PORT_RANGE_END (\S+)
Value FLAGS_MATCH (match-all|match-any)
Value TCP_FLAG (((\+|-|)ack(\s*?)|(\+|-|)established(\s*?)|(\+|-|)fin(\s*?)|(\+|-|)fragments(\s*?)|(\+|-|)psh(\s*?)|(\+|-|)rst(\s*?)|(\+|-|)syn(\s*?)|urg(\s*?))+)
Value LOG (log-input|log)
Value LOG_TAG (\S+)
Value ICMP_TYPE (administratively-prohibited|echo|echo-reply|mask-request|packet-too-big|parameter-problem|port-unreachable|redirect|router-advertisement|router-solicitation|time-exceeded|ttl-exceeded|unreachable)
Value TIME (\S+)
Value STATE (inactive|active)
Value MATCHES (\d+)

Start
  ^(Standard|Extended) -> Continue.Clearall
  ^${ACL_TYPE}\s+IP\s+access\s+list\s+${ACL_NAME}\s* -> Record
  ^\s+${LINE_NUM}\s+${ACTION}\s+${PROTOCOL}\s+(host\s+${SRC_HOST}|${SRC_ANY}|${SRC_NETWORK}\s+${SRC_WILDCARD})(\s+${SRC_PORT_MATCH}\s+|)(${SRC_PORT_RANGE_START}\s+${SRC_PORT_RANGE_END}|${SRC_PORT}|)\s+(host\s+${DST_HOST}|${DST_ANY}|${DST_NETWORK}\s+${DST_WILDCARD})(\s+${DST_PORT_MATCH}\s+(${DST_PORT_RANGE_START}\s+${DST_PORT_RANGE_END}|${DST_PORT}|)|\s+(${FLAGS_MATCH}\s+|)${TCP_FLAG}|)(\s+${ICMP_TYPE}|)(\s+${LOG}|)(\s+time-range\s+${TIME}\s+\(${STATE}\)|)(?:\s+\(${MATCHES}\s+\S+\)|)(\s+\(tag\s+=\s+${LOG_TAG}\)|)\s*$$ -> Record
  ^\s+${LINE_NUM}\s+${ACTION}\s+(${SRC_NETWORK},\s+wildcard\s+bits\s+${SRC_WILDCARD}|${SRC_HOST}|${SRC_ANY})(\s+${LOG}|)(\s+time-range\s+${TIME}\s+\(${STATE}\)|)(?:\s+\(${MATCHES}\s+matches\)|)(\s+\(tag\s+=\s+${LOG_TAG}\)|)\s*$$ -> Record
  ^\s*$$
  # Capture time-stamp if vty line has command time-stamping turned on
  ^Load\s+for\s+
  ^Time\s+source\s+is
  ^.* -> Error "Could not parse line:"

EOF

SAMPLE COMMAND OUTPUT

Standard IP access list Routes-To-Carrier
    10 permit 10.163.244.32 (1 match)

SUMMARY

Standard ACL entries with "(1 match)" at the end of the string fail to parse.

  File "/home/mitchf/.cache/pypoetry/virtualenvs/ntc-templates-mltuM8_k-py3.8/lib/python3.8/site-packages/textfsm/parser.py", line 1021, in _Operations
    raise TextFSMError('Error: %s. Rule Line: %s. Input Line: %s.'
textfsm.parser.TextFSMError: Error: "Could not parse line:". Rule Line: 40. Input Line:     10 permit 10.163.244.32 (1 match).

STEPS TO REPRODUCE

For a file containing the output for a standard ACL from "show ip access-lists" where 1 or more ACL entries contains " (1 match)" at the end of the line, and the file is named "tests/cisco_ios/show_ip_access-lists/cisco_ios_show_ip_access-lists_970.raw":

from ntc_templates.parse import parse_output
raw_data_file = open("tests/cisco_ios/show_ip_access-lists/cisco_ios_show_ip_access-lists_970.raw", "r")
raw_data = raw_data_file.read()
parsed_acls = parse_output(platform="cisco_ios", command="show ip access-lists", data=raw_data)

EXPECTED RESULTS

The script should parse all ACL entries into a list of dicts.

ACTUAL RESULTS

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/mitchf/sandbox/ntc-templates/ntc_templates/parse.py", line 57, in parse_output
    cli_table.ParseCmd(data, attrs)
  File "/home/mitchf/.cache/pypoetry/virtualenvs/ntc-templates-mltuM8_k-py3.8/lib/python3.8/site-packages/textfsm/clitable.py", line 282, in ParseCmd
    self.table = self._ParseCmdItem(self.raw, template_file=template_files[0])
  File "/home/mitchf/.cache/pypoetry/virtualenvs/ntc-templates-mltuM8_k-py3.8/lib/python3.8/site-packages/textfsm/clitable.py", line 315, in _ParseCmdItem
    for record in fsm.ParseText(cmd_input):
  File "/home/mitchf/.cache/pypoetry/virtualenvs/ntc-templates-mltuM8_k-py3.8/lib/python3.8/site-packages/textfsm/parser.py", line 895, in ParseText
    self._CheckLine(line)
  File "/home/mitchf/.cache/pypoetry/virtualenvs/ntc-templates-mltuM8_k-py3.8/lib/python3.8/site-packages/textfsm/parser.py", line 944, in _CheckLine
    if self._Operations(rule, line):
  File "/home/mitchf/.cache/pypoetry/virtualenvs/ntc-templates-mltuM8_k-py3.8/lib/python3.8/site-packages/textfsm/parser.py", line 1021, in _Operations
    raise TextFSMError('Error: %s. Rule Line: %s. Input Line: %s.'
textfsm.parser.TextFSMError: Error: "Could not parse line:". Rule Line: 40. Input Line:     10 permit 10.163.244.32 (1 match).