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module Specinfra
module Command
module Module
module Ss
def check_is_listening(port, options={})
if options[:local_address]
pattern = inaddr_any_to_asterisk(options[:local_address]).map { |l| " #{l}:#{port} " }
pattern = pattern.join('|')
else
pattern = ":#{port} "
end
"ss #{command_options(options[:protocol])} | grep -E -- #{escape(pattern)}"
end
private
# WORKAROUND:
# Older ss versions display "*" instead of "0.0.0.0".
# But serverspec validates IP address by `valid_ip_address?` method:
# https://github.com/serverspec/serverspec/blob/master/lib/serverspec/type/port.rb
def inaddr_any_to_asterisk(local_address)
if local_address == '0.0.0.0'
[ '\*' , '0\.0\.0\.0' ]
else
[ fix_format_if_ipv6(local_address) ]
end
end
def fix_format_if_ipv6(local_address)
if local_address =~ /.*:.*/
"\\[#{local_address}\\]"
else
local_address
end
end
def command_options(protocol)
case protocol.to_s
when 'tcp' then "-tnl4"
when 'tcp6' then "-tnl6"
when 'udp' then "-unl4"
when 'udp6' then "-unl6"
when '' then "-tunl"
else
raise ArgumentError, "Unknown protocol [#{protocol}]"
end
end
end
end
end
end
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