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|
#! /usr/bin/perl
# $OpenBSD: flow.pl,v 1.5 2017/02/27 21:56:09 bluhm Exp $
# Copyright (c) 2013 Florian Obser <florian@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
use strict;
use warnings;
use 5.010;
use Config;
use lib '.';
use Data::Dumper;
use IO::Socket::INET;
use Net::Flow;
my $port = 9996;
{
my $id2name = {
1 => 'octetDeltaCount',
2 => 'packetDeltaCount',
4 => 'protocolIdentifier',
5 => 'ipClassOfService',
7 => 'sourceTransportPort',
8 => 'sourceIPv4Address',
10 => 'ingressInterface',
11 => 'destinationTransportPort',
12 => 'destinationIPv4Address',
14 => 'egressInterface',
21 => 'flowEndSysUpTime',
22 => 'flowStartSysUpTime',
27 => 'sourceIPv6Address',
28 => 'destinationIPv6Address',
150 => 'flowStartSeconds',
151 => 'flowEndSeconds',
152 => 'flowStartMilliseconds',
153 => 'flowEndMilliseconds',
};
my $name2id = {reverse %$id2name};
sub id2name { return $id2name->{$_[0]} || $_[0]; }
sub name2id { return $name2id->{$_[0]} || $_[0]; }
}
sub get_ifs
{
my (@ifs, $prog);
open($prog, 'ifconfig |') or die $!;
while(<$prog>) {
chomp;
push(@ifs, $1) if(/^(\w+):/);
}
close($prog) or die $!;
return(grep({$_ ne 'lo0'} @ifs));
}
sub gen_pf_conf
{
my @ifs = @_;
my $skip = 'set skip on {'.join(' ', @ifs).'}';
return <<END;
$skip
pass on lo0 no state
pass on lo0 proto tcp from port 12345 to port 12346 keep state (pflow)
END
}
if (scalar(@ARGV) != 2 || ($ARGV[0] != 9 && $ARGV[0]!=10)) {
print STDERR "usage: $0 [9|10] [4|6]\n";
exit(1);
}
if (scalar(@ARGV) != 2 || ($ARGV[1] != 4 && $ARGV[1]!=6)) {
print STDERR "usage: $0 [9|10] [4|6]\n";
exit(1);
}
my @v94_elem_names = qw (sourceIPv4Address
destinationIPv4Address
ingressInterface
egressInterface
packetDeltaCount
octetDeltaCount
flowStartSysUpTime
flowEndSysUpTime
sourceTransportPort
destinationTransportPort
ipClassOfService
protocolIdentifier);
my @v96_elem_names = qw (sourceIPv6Address
destinationIPv6Address
ingressInterface
egressInterface
packetDeltaCount
octetDeltaCount
flowStartSysUpTime
flowEndSysUpTime
sourceTransportPort
destinationTransportPort
ipClassOfService
protocolIdentifier);
my @v104_elem_names = qw (sourceIPv4Address
destinationIPv4Address
ingressInterface
egressInterface
packetDeltaCount
octetDeltaCount
flowStartMilliseconds
flowEndMilliseconds
sourceTransportPort
destinationTransportPort
ipClassOfService
protocolIdentifier);
my @v106_elem_names = qw (sourceIPv6Address
destinationIPv6Address
ingressInterface
egressInterface
packetDeltaCount
octetDeltaCount
flowStartMilliseconds
flowEndMilliseconds
sourceTransportPort
destinationTransportPort
ipClassOfService
protocolIdentifier);
my ($name, $sock, $packet, $header_ref, $template_ref, $flow_ref, $flows_ref,
$error_ref, @elem_names, $prog, $line);
system('ifconfig', 'lo0', 'inet', '10.11.12.13', 'alias');
system('ifconfig', 'lo0', 'inet6', '2001:db8::13');
open($prog, '|pfctl -f -') or die $!;
print $prog gen_pf_conf(get_ifs());
close($prog) or die $!;
if (`ifconfig pflow0 2>&1` ne "pflow0: no such interface\n") {
system('ifconfig', 'pflow0', 'destroy');
}
system('ifconfig', 'pflow0', 'flowsrc', '127.0.0.1', 'flowdst',
'127.0.0.1:9996', 'pflowproto', $ARGV[0]);
system('./gen_traffic '.$ARGV[1].' &');
if ($ARGV[0] == 9 && $ARGV[1] == 4) {
@elem_names = @v94_elem_names;
} elsif ($ARGV[0] == 9 && $ARGV[1] == 6) {
@elem_names = @v96_elem_names;
} elsif ($ARGV[0] == 10 && $ARGV[1] == 4) {
@elem_names = @v104_elem_names;
} elsif ($ARGV[0] == 10 && $ARGV[1] == 6) {
@elem_names = @v106_elem_names;
}
$sock = IO::Socket::INET->new(LocalPort =>$port, Proto => 'udp');
while ($sock->recv($packet,1548)) {
($header_ref, $template_ref, $flows_ref, $error_ref) =
Net::Flow::decode(\$packet, $template_ref);
if (scalar(@$flows_ref) > 0) {
say scalar(@$flows_ref),' flows';
foreach $flow_ref (@$flows_ref) {
say scalar(keys %$flow_ref) - 1, ' elements';
say 'SetId: ', $flow_ref->{'SetId'};
my ($iif, $eif, $start, $end);
my $qpack = $Config{longsize} == 8 ? 'Q>' :
$Config{byteorder} == 1234 ? 'L>xxxx' : 'xxxxL>';
foreach $name (@elem_names) {
if ($name eq 'ingressInterface') {
$iif = unpack('N',
$flow_ref->{name2id($name)});
} elsif ($name eq 'egressInterface') {
$eif = unpack('N',
$flow_ref->{name2id($name)});
} elsif ($name eq 'flowStartSysUpTime') {
$start = unpack('N',
$flow_ref->{name2id($name)})/1000;
} elsif ($name eq 'flowEndSysUpTime') {
$end = unpack('N',
$flow_ref->{name2id($name)})/1000;
} elsif ($name eq 'flowStartSeconds') {
$start = unpack('N',
$flow_ref->{name2id($name)});
} elsif ($name eq 'flowEndSeconds') {
$end = unpack('N',
$flow_ref->{name2id($name)});
} elsif ($name eq 'flowStartMilliseconds') {
$start = unpack($qpack,
$flow_ref->{name2id($name)})/1000;
} elsif ($name eq 'flowEndMilliseconds') {
$end = unpack($qpack,
$flow_ref->{name2id($name)})/1000;
} else {
say $name,': ', unpack('H*',
$flow_ref->{name2id($name)});
}
}
say 'ingressInterface == egressInterface && '.
'egressInterface > 0: ', ($iif == $eif && $eif > 0);
}
last;
}
}
END {
system('ifconfig', 'pflow0', 'destroy');
system('ifconfig', 'lo0', 'inet', '10.11.12.13', 'delete');
system('ifconfig', 'lo0', 'inet6', '2001:db8::13', 'delete');
}
|
