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|
require 'socket'
require 'timeout'
#
# The TCP-protocol test.
#
# This object is instantiated if the parser sees a line such as:
#
###
### foo.vm.bytemark.co.uk must run tcp on 22 with banner 'ssh' otherwise 'ssh fail'.
###
#
# The specification of the port is mandatory, the banner is optional.
#
class TCPTest < ProtocolTest
#
# The host to test against.
#
attr_reader :host
#
# The port to connect to.
#
attr_reader :port
#
# The banner to look for, may be nil.
#
attr_reader :banner
#
# Constructor
#
# Ensure we received a port to run the TCP-test against.
#
def initialize( line )
#
# Save the host
#
@host = line.split( /\s+/)[0]
#
# Save the port
#
if ( line =~ /on\s+([0-9]+)/ )
@port = $1.dup
else
@port = nil
end
#
# Save the optional banner.
#
if ( line =~ /with\s+banner\s+'([^']+)'/ )
@banner = $1.dup
else
@banner = nil
end
@error = nil
if ( @port.nil? )
raise ArgumentError, "Missing port to test against"
end
end
#
# Helper for development.
#
def to_s
"tcp-test of #{@host}:#{@port} looking for banner '#{@banner}'."
end
#
# Convert this class to JSON such that it may be serialized.
#
def to_json
hash = {
:test_type => 'tcp',
:test_target => @host,
:test_port => @port,
:banner => @banner
}
hash.to_json
end
#
# Run the TCP-protocol test.
#
def run_test
# reset the error, in case we were previously executed.
@error = nil
return( run_test_internal( @host, @port, @banner ) )
end
#
# Run the connection test - optionally matching against the banner.
#
# If the banner is nil then we're merely testing we can connect and
# send the string "quit".
#
#
def run_test_internal( host, port, banner = nil )
begin
timeout(30) do
begin
socket = TCPSocket.new( host, port )
socket.puts( "QUIT")
# read a banner from the remote server
read = socket.gets(nil)
# trim to a sane length & strip newlines.
read = read[0,255] unless ( read.nil? )
read.gsub!(/[\n\r]/, "") unless ( read.nil? )
socket.close()
if ( banner.nil? )
@error = nil
return true
else
# test for banner
if ( ( !read.nil? ) && ( read =~ /#{banner}/i ) )
return true
end
@error = "We expected a banner matching '#{banner}' but we got '#{read}'"
return false
end
rescue
@error = "Exception connecting to host #{host}:#{port} - #{$!}"
return false
end
end
rescue Timeout::Error => e
@error = "TIMEOUT: #{e}"
return false
end
@error = "Misc failure"
return false
end
#
# If the test fails then report the error.
#
def error
@error
end
register_test_type "tcp"
end
|
