Class: Cloudscopes::Network

Inherits:
Object
  • Object
show all
Defined in:
lib/cloudscopes/network.rb

Instance Method Summary collapse

Instance Method Details

#local_ip ⇒ Object 



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# File 'lib/cloudscopes/network.rb', line 8

def local_ip
  Socket.ip_address_list.detect {|intf| intf.ipv4? and !intf.ipv4_loopback? and !intf.ipv4_multicast? }.ip_address
end

#open_server_ports(port) ⇒ Object 



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# File 'lib/cloudscopes/network.rb', line 44

def open_server_ports(port)
  sockets.select do |s|
    s[4].to_i == 1 # only established sockets
  end.select do |s| 
    s[1] == port
  end
end

#port_open?(port) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cloudscopes/network.rb', line 12

def port_open?(port)
  begin
    Timeout::timeout(1) do
      begin
        TCPSocket.new(local_ip, port).close
        return true
      rescue Errno::ECONNREFUSED, Errno::EHOSTUNREACH
        return false
      end
    end
  rescue Timeout::Error
    return false
  end
end

#proc_ip_hex_to_dotted(hexstr) ⇒ Object 



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# File 'lib/cloudscopes/network.rb', line 27

def proc_ip_hex_to_dotted(hexstr)
  hexstr.scan(/../).map(&:hex).reverse*"."
end

#sockets ⇒ Object 



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# File 'lib/cloudscopes/network.rb', line 31

def sockets
  File.read("/proc/net/tcp").split("\n").drop(1).collect do |l| 
    l.strip.split(/\s+/) 
  end.collect do |s|
    s[1..2] = s[1].split(/:/) + s[2].split(/:/) # split local/remote addresses to ip and port as separate fields
    s[1] = proc_ip_hex_to_dotted(s[1])
    s[2] = s[2].to_i(16)
    s[3] = proc_ip_hex_to_dotted(s[3])
    s[4] = s[4].to_i(16)
    s.drop(1) # drop the index
  end
end