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|
#!/usr/bin/ruby1.8
require 'socket'
require 'timeout'
#
# Test that we can receive a response from a TCP server that matches
# a given banner.
#
class TCPTest
#
# Data passed from the JSON hash.
#
attr_reader :test_data
#
# The error text we return on failure.
#
attr_reader :error
#
# Save the data away.
#
def initialize( data )
@test_data = data
@error = nil
#
# Ensure we have a host to probe
#
if ( @test_data["target_host"].nil? )
@error = "Missing target for the test."
raise ArgumentError, @error
end
#
# Ensure we have a port to test.
#
if ( @test_data["test_port"].nil? )
@error = "Missing port for the test."
raise ArgumentError, @error
end
end
#
# Run the test.
#
# Return "true" on success
#
# Return "false" on failure.
#
# If the test fails the details should be retrieved from "error".
#
def run_test
#
# Reset state from previous test.
#
@error = nil
#
# Get the hostname & port to test against.
#
host = @test_data['target_host']
port = @test_data['test_port']
#
# Get the banner we expect
#
banner = @test_data['banner']
puts "TCP testing host #{host}:#{port}" if ( @test_data['verbose'] )
if ( @test_data['verbose'] && ( !banner.nil? ) )
puts "Looking for banner '#{banner}'"
end
begin
timeout(@test_data["timeout"].to_i) 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? )
return true
else
# test for banner
if ( ( !read.nil? ) && ( read =~ /#{banner}/i ) )
puts "We connected and matched the banner against '#{read}'" if ( @test_data['verbose'] )
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
#
# Return the error text for why this test failed.
#
def error
return @error
end
end
#
# Sample test, for basic testing.
#
if __FILE__ == $0 then
#
# Sample data.
#
test = {
"target_host" => "mail.steve.org.uk",
"test_type" => "tcp",
"test_port" => "25",
"banner" => "SMTP",
"verbose" => 1,
"timeout" => 5,
"test_alert" => "TCP-port failure",
}
#
# Run the test.
#
obj = TCPTest.new( test )
if ( obj.run_test )
puts "TEST OK"
else
puts "TEST FAILED"
puts obj.error()
end
end
|
