Provided by: libnmap-parser-perl_1.05-2_all 
NAME
Nmap::Parser - parse nmap scan data with perl
SYNOPSIS
use Nmap::Parser;
my $np = new Nmap::Parser;
$np->parsescan($nmap_path, $nmap_args, @ips);
#or
$np->parsefile($file_xml);
my $session = $np->get_session();
#a Nmap::Parser::Session object
my $host = $np->get_host($ip_addr);
#a Nmap::Parser::Host object
my $service = $host->tcp_service(80);
#a Nmap::Parser::Host::Service object
my $os = $host->os_sig();
#a Nmap::Parser::Host::OS object
#---------------------------------------
my $np2 = new Nmap::Parser;
$np2->callback(\&my_callback);
$np2->parsefile($file_xml);
#or
$np2->parsescan($nmap_path, $nmap_args, @ips);
sub my_callback {
my $host = shift;
#Nmap::Parser::Host object
#.. see documentation for all methods ...
}
For a full listing of methods see the documentation corresponding to each object.
DESCRIPTION
This module implements a interface to the information contained in an nmap scan. It is
implemented by parsing the xml scan data that is generated by nmap. This will enable
anyone who utilizes nmap to quickly create fast and robust security scripts that utilize
the powerful port scanning abilities of nmap.
OVERVIEW
This module has an internal framework to make it easy to retrieve the desired information
of a scan. Every nmap scan is based on two main sections of informations: the scan
session, and the scan information of all hosts. The session information will be stored as
a Nmap::Parser::Session object. This object will contain its own methods to obtain the
desired information. The same is true for any hosts that were scanned using the
Nmap::Parser::Host object. There are two sub objects under Nmap::Parser::Host. One is the
Nmap::Parser::Host::Service object which will be used to obtain information of a given
service running on a given port. The second is the Nmap::Parser::Host::OS object which
contains the operating system signature information (OS guessed names, classes,
osfamily..etc).
Nmap::Parser -- Core parser
|
+--Nmap::Parser::Session -- Nmap scan session information
|
+--Nmap::Parser::Host -- General host information
| |
| |-Nmap::Parser::Host::Service -- Port service information
| |
| |-Nmap::Parser::Host::OS -- Operating system signature information
METHODS
Nmap::Parser
The main idea behind the core module is, you will first parse the information and then
extract data. Therefore, all parse*() methods should be executed before any get_*()
methods.
parse($string)
parse($filehandle)
Parses the nmap scan information in $string. Note that is usually only used if you
have the whole xml scan information in $string or if you are piping the scan
information.
parsefile($xml_file)
Parses the nmap scan data in $xml_file. This file can be generated from an nmap scan
by using the '-oX filename.xml' option with nmap. If you get an error or your program
dies due to parsing, please check that the xml information is compliant. The file is
closed no matter how "parsefile()" returns.
parsescan($nmap,$args,@ips)
This method runs an nmap scan where $nmap is the path to the nmap executable, $args
are the nmap command line parameters, and @ips are the list of IP addresses to scan.
parsescan() will automagically run the nmap scan and parse the information. See
section EXAMPLES for a short tutorial
Note: You cannot have one of the nmap options to be '-oX', '-oN' or '-oG'. Your
program will die if you try and pass any of these options because it decides the type
of output nmap will generate. The IP addresses can be nmap-formatted addresses (see
nmap(1)
If you get an error or your program dies due to parsing, please check that the xml
information is compliant. If you are using parsescan() or an open filehandle , make
sure that the nmap scan that you are performing is successful in returning xml
information. (Sometimes using loopback addresses causes nmap to fail).
purge()
Cleans the xml scan data from memory. This is useful if you have a program where you
are parsing lots of nmap scan data files with persistent variables.
callback(\&code_ref)
Sets the parsing mode to be done using the callback function. It takes the parameter
of a code reference or a reference to a function. If no code reference is given, it
resets the mode to normal (no callback).
$np->callback(\&my_function); #sets callback, my_function() will be called
$np->callback(); #resets it, no callback function called. Back to normal.
get_session()
Obtains the Nmap::Parser::Session object which contains the session scan information.
get_host($ip_addr)
Obtains the Nmap::Parser::Host object for the given $ip_addr.
del_host($ip_addr)
Deletes the stored Nmap::Parser::Host object whose IP is $ip_addr.
all_hosts()
all_hosts($status)
Returns an array of all the Nmap::Parser::Host objects for the scan. If the optional
status is given, it will only return those hosts that match that status. The status
can be any of the following: "(up|down|unknown|skipped)"
get_ips()
get_ips($status)
Returns the list of IP addresses that were scanned in this nmap session. They are
sorted using ipv4_sort. If there are IPv6 addresses, or mixed, it might not be in
correct sorted order. If the optional status is given, it will only return those IP
addresses that match that status. The status can be any of the following:
"(up|down|unknown|skipped)"
ipv4_sort(@ips)
This function takes a list of IPv4 addresses and returns the correctly sorted version
of the list.
Nmap::Parser::Session
This object contains the scan session information of the nmap scan.
finish_time()
Returns the numeric time that the nmap scan finished.
nmap_version()
Returns the version of nmap used for the scan.
numservices()
numservices($type)
If numservices is called without argument, it returns the total number of services
that were scanned for all types. If $type is given, it returns the number of services
for that given scan type. See scan_types() for more info.
scan_args()
Returns a string which contains the nmap executed command line used to run the scan.
scan_type_proto($type)
Returns the protocol type of the given scan type (provided by $type). See scan_types()
for more info.
scan_types()
Returns the list of scan types that were performed. It can be any of the following:
"(syn|ack|bounce|connect|null|xmas|window|maimon|fin|udp|ipproto)".
start_str()
Returns the human readable format of the start time.
start_time()
Returns the numeric form of the time the nmap scan started.
time_str()
Returns the human readable format of the finish time.
xml_version()
Returns the version of nmap xml file.
Nmap::Parser::Host
This object represents the information collected from a scanned host.
status()
Returns the state of the host. It is usually one of these "(up|down|unknown|skipped)".
addr()
Returns the main IP address of the host. This is usually the IPv4 address. If there is
no IPv4 address, the IPv6 is returned (hopefully there is one).
addrtype()
Returns the address type of the address given by addr() .
all_hostnames()
Returns a list of all hostnames found for the given host.
extraports_count()
Returns the number of extraports found.
extraports_state()
Returns the state of all the extraports found.
hostname()
hostname($index)
As a basic call, hostname() returns the first hostname obtained for the given host. If
there exists more than one hostname, you can provide a number, which is used as the
location in the array. The index starts at 0;
#in the case that there are only 2 hostnames
hostname() eq hostname(0);
hostname(1); #second hostname found
hostname(400) eq hostname(1) #nothing at 400; return the name at the last index
ipv4_addr()
Explicitly return the IPv4 address.
ipv6_addr()
Explicitly return the IPv6 address.
mac_addr()
Explicitly return the MAC address.
mac_vendor()
Return the vendor information of the MAC.
os_sig()
Returns an Nmap::Parser::Host::OS object that can be used to obtain all the Operating
System signature (fingerprint) information. See Nmap::Parser::Host::OS for more
details.
$os = $host->os_sig;
$os->name;
$os->osfamily;
tcpsequence_class()
tcpsequence_index()
tcpsequence_values()
Returns the class, index and values information respectively of the tcp sequence.
ipidsequence_class()
ipidsequence_values()
Returns the class and values information respectively of the ipid sequence.
tcptssequence_class()
tcptssequence_values()
Returns the class and values information respectively of the tcpts sequence.
uptime_lastboot()
Returns the human readable format of the timestamp of when the host had last rebooted.
uptime_seconds()
Returns the number of seconds that have passed since the host's last boot from when
the scan was performed.
tcp_ports()
udp_ports()
Returns the sorted list of TCP|UDP ports respectively that were scanned on this host.
Optionally a string argument can be given to these functions to filter the list.
$host->tcp_ports('open') #returns all only 'open' ports (even 'open|filtered')
$host->udp_ports('open|filtered'); #matches exactly ports with 'open|filtered'
Note that if a port state is set to 'open|filtered' (or any combination), it will be
counted as an 'open' port as well as a 'filtered' one.
tcp_port_count()
udp_port_count()
Returns the total of TCP|UDP ports scanned respectively.
tcp_port_state($portid)
udp_port_state($portid)
Returns the state of the given port, provided by the port number in $portid.
tcp_open_ports()
udp_open_ports()
Returns the list of open TCP|UDP ports respectively. Note that if a port state is for
example, 'open|filtered', it will appear on this list as well.
tcp_filtered_ports()
udp_filtered_ports()
Returns the list of filtered TCP|UDP ports respectively. Note that if a port state is
for example, 'open|filtered', it will appear on this list as well.
tcp_closed_ports()
udp_closed_ports()
Returns the list of closed TCP|UDP ports respectively. Note that if a port state is
for example, 'closed|filtered', it will appear on this list as well.
tcp_service($portid)
udp_service($portid)
Returns the Nmap::Parser::Host::Service object of a given service running on port,
provided by $portid. See Nmap::Parser::Host::Service for more info.
$svc = $host->tcp_service(80);
$svc->name;
$svc->proto;
Nmap::Parser::Host::Service
This object represents the service running on a given port in a given host. This object is
obtained by using the tcp_service($portid) or udp_service($portid) method from the
Nmap::Parser::Host object. If a portid is given that does not exist on the given host,
these functions will still return an object (so your script doesn't die). Its good to use
tcp_ports() or udp_ports() to see what ports were collected.
confidence()
Returns the confidence level in service detection.
extrainfo()
Returns any additional information nmap knows about the service.
method()
Returns the detection method.
name()
Returns the service name.
owner()
Returns the process owner of the given service. (If available)
port()
Returns the port number where the service is running on.
product()
Returns the product information of the service.
proto()
Returns the protocol type of the service.
rpcnum()
Returns the RPC number.
tunnel()
Returns the tunnel value. (If available)
version()
Returns the version of the given product of the running service.
Nmap::Parser::Host::OS
This object represents the Operating System signature (fingerprint) information of the
given host. This object is obtained from an Nmap::Parser::Host object using the "os_sig()"
method. One important thing to note is that the order of OS names and classes are sorted
by DECREASING ACCURACY. This is more important than alphabetical ordering. Therefore, a
basic call to any of these functions will return the record with the highest accuracy.
(Which is probably the one you want anyways).
all_names()
Returns the list of all the guessed OS names for the given host.
class_accuracy()
class_accuracy($index)
A basic call to class_accuracy() returns the osclass accuracy of the first record. If
$index is given, it returns the osclass accuracy for the given record. The index
starts at 0.
class_count()
Returns the total number of OS class records obtained from the nmap scan.
name()
name($index)
names()
names($index)
A basic call to name() returns the OS name of the first record which is the name with
the highest accuracy. If $index is given, it returns the name for the given record.
The index starts at 0.
name_accuracy()
name_accuracy($index)
A basic call to name_accuracy() returns the OS name accuracy of the first record. If
$index is given, it returns the name for the given record. The index starts at 0.
name_count()
Returns the total number of OS names (records) for the given host.
osfamily()
osfamily($index)
A basic call to osfamily() returns the OS family information of the first record. If
$index is given, it returns the OS family information for the given record. The index
starts at 0.
osgen()
osgen($index)
A basic call to osgen() returns the OS generation information of the first record. If
$index is given, it returns the OS generation information for the given record. The
index starts at 0.
portused_closed()
Returns the closed port number used to help identify the OS signatures. This might not
be available for all hosts.
portused_open()
Returns the open port number used to help identify the OS signatures. This might not
be available for all hosts.
type()
type($index)
A basic call to type() returns the OS type information of the first record. If $index
is given, it returns the OS type information for the given record. The index starts at
0.
vendor()
vendor($index)
A basic call to vendor() returns the OS vendor information of the first record. If
$index is given, it returns the OS vendor information for the given record. The index
starts at 0.
EXAMPLES
I think some of us best learn from examples. These are a couple of examples to help create
custom security audit tools using some of the nice features of the Nmap::Parser module.
Hopefully this can double as a tutorial. More tutorials (articles) can be found at
www.nmapparser.com
Real-Time Scanning - (no better "time()" like 'now')
You can run a nmap scan and have the parser parse the information automagically. The only
constraint is that you cannot use '-oX', '-oN', or '-oG' as one of your arguments for nmap
command line parameters passed to parsescan().
use Nmap::Parser;
my $np = new Nmap::Parser;
my @hosts = @ARGV; #get hosts from cmd line
#runs the nmap command with hosts and parses it automagically
$np->parsescan('/usr/bin/nmap','-sS O -p 1-1023',@hosts);
for my $host ($np->all_hosts()){
print $host->hostname."\n";
#do mor stuff...
}
Callbacks - ("not our $normal *69")
This is probably the easiest way to write a script with using Nmap::Parser, if you don't
need the general scan session information. During the parsing process, the parser will
obtain information of every host. The callback function (in this case 'booyah()') is
called after the parsing of every host (sequentially). When the callback returns, the
parser will delete all information of the host it had sent to the callback. This callback
function is called for every host that the parser encounters. The callback function must
be setup before parsing
use Nmap::Parser;
my $np = new Nmap::Parser;
$np->callback( \&booyah );
$np->parsefile('nmap_results.xml');
# or use parsescan()
sub booyah {
my $host = shift; #Nmap::Parser::Host object, just parsed
print 'IP: ',$host->addr,"\n";
# ... do more stuff with $host ...
#when it returns, host object will be deleted from memory
#(good for processing VERY LARGE files or scans)
}
Multiple Instances - ("no less 'of'; my $self")
Using multiple instances of Nmap::Parser is extremely useful in helping audit/monitor the
network Policy (ohh noo! its that 'P' word!). In this example, we have a set of hosts
that had been scanned previously for tcp services where the image was saved in
base_image.xml. We now will scan the same hosts, and compare if any new tcp have been open
since then (good way to look for suspicious new services). Easy security Compliance
detection. (ooh noo! The 'C' word too!).
use Nmap::Parser;
use vars qw($nmap_exe $nmap_args @ips);
my $base = new Nmap::Parser;
my $curr = new Nmap::Parser;
$base->parsefile('base_image.xml'); #load previous state
$curr->parsescan($nmap_exe, $nmap_args, @ips); #scan current hosts
for my $ip ($curr->get_ips )
{
#assume that IPs in base == IPs in curr scan
my $ip_base = $base->get_host($ip);
my $ip_curr = $curr->get_host($ip);
my %port = ();
#find ports that are open that were not open before
#by finding the difference in port lists
my @diff = grep { $port{$_} < 2}
(map {$port{$_}++; $_}
( $ip_curr->tcp_open_ports , $ip_base->tcp_open_ports ));
print "$ip has these new ports open: ".join(',',@diff) if(scalar @diff);
for (@diff){print "$_ seems to be ",$ip_curr->tcp_service($_)->name,"\n";}
}
SUPPORT
Discussion Forum
If you have questions about how to use the module, or any of its features, you can post
messages to the Nmap::Parser module forum on CPAN::Forum.
<http://www.cpanforum.com/dist/Nmap-Parser>
Bug Reports
Please submit any bugs to: <http://sourceforge.net/tracker/?group_id=97509&atid=618345>
Please make sure that you submit the xml-output file of the scan which you are having
trouble. This can be done by running your scan with the -oX filename.xml nmap switch.
Please remove any important IP addresses for security reasons.
SEE ALSO
nmap, XML::Twig
The Nmap::Parser page can be found at: <http://www.nmapparser.com>. It contains the
latest developments on the module. The nmap security scanner homepage can be found at:
<http://www.insecure.org/nmap/>.
AUTHOR
Anthony G Persaud <apersaud@gmail.com> <http://www.anthonypersaud.com>
COPYRIGHT
This program is free software; you can redistribute it and/or modify it under the terms of
the GNU General Public License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
<http://www.opensource.org/licenses/gpl-license.php>