Ruby实现端口扫描

#!/usr/bin/ruby -w

=begin

quite simple connect scanner in ruby

Shows open (reliable), close and filtered. But the reliablity

of the last two states depends of course on firewalling and the timeout

interval you can set down. Uncomment or comment states you want or don’t

want to get printed on the screen.

*supports scanning mutiple hosts/IPs (like www.heise.de,www.gulli.com)

*supports multiple ports(like 12,45,53,165),ranges(like 20..85) or one single

port(like 80)

*support a ports file like http://insecure.org/nmap/data/nmap-services (just

clean it with | grep /tcp ..)

ZGlnaXRhbGJ5dGU=

=end

require ‘socket’

require ‘timeout’

class Scanner

def initialize

@hosts,@ports = Array($*)

end

def portarrange

case @ports

when /^.+[..]/

@ports = @ports.split(“..”)

@ports = @ports[0].to_i..@ports[1].to_i

when /^.+[,]/

@ports = @ports.split(“,”)

else

@ports = Array(@ports)

end

end

def hostarrange

case @hosts

when /^.+[,]/

@hosts = @hosts.split(“,”)

else

@hosts = Array(@hosts)

end

end

def output(state,port)

printed = false

portsfile = File.new(“ports”, “r”)

scanpat = “^.+ #{port}/tcp”

begin

portsfile.each_line do |line|

if line =~ Regexp.new(scanpat)

puts “#{state} : #{line}”

printed = true

end

end

puts “#{state} : #{port}” if printed == false

ensure

portsfile.close

end

end

def scanning(hosts,ports)

hosts.each do |host|

begin

puts “scanning #{host}:”

ports.each do |port|

begin

Timeout::timeout(10){TCPSocket.new(host, port)}

rescue Timeout::Error

output(“filtered”,port)

rescue

# output(“closed”,port)

else

output(“open”,port)

end

end

end

end

end

end

##################### code start #####################

puts “no arguments past,correct usage:\nruby #{$0} [hosts] [ports]\n” if

!ARGV[1]

my_scanner = Scanner.new

hosts = my_scanner.hostarrange

ports = my_scanner.portarrange

my_scanner.scanning(hosts,ports)

##################### eof #####################