dhcp flood client

perftest.pl

+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+
+my($maccnt, $pps, $src, $dest) = @ARGV;
+
+usage() if !defined $dest;
+
+if ( $maccnt !~ /^\d+$/ || $maccnt < 1 ) {
+	print STDERR "MAC count must be a positive integer\n";
+	exit 1;
+}
+
+if ( $pps !~ /^\d+$/ || $pps < 1 ) {
+	print STDERR "packets/sec must be a positive integer\n";
+	exit 1;
+}
+
+if ( $src !~ /^(\d+\.\d+\.\d+\.\d+)$/ ) {
+	print STDERR "source IP must be a valid IPv4 address\n";
+	exit 1;
+}
+
+if ( $dest !~ /^(\d+\.\d+\.\d+\.\d+)$/ ) {
+	print STDERR "destination IP must be a valid IPv4 address\n";
+	exit 1;
+}
+
+main($maccnt, $pps, $src, $dest);
+
+sub usage {
+	print STDERR "DHCP Flood using option 82\n";
+	print STDERR "This is only to test dhcp_protect, the DHCP packets aren't really valid\n";
+	print STDERR "DO NOT SEND THIS TO YOUR DHCP SERVER !!!!\n";
+	print STDERR "\n";
+	print STDERR "Usage: $0 <MAC count> <packets/sec> <source IPv4> <destination IPv4>\n";
+	print STDERR "Dependency: nemesis must be installed\n";
+	print STDERR "https://ftp.troglobit.com/nemesis/\n";
+	print STDERR "\n";
+	exit 1;
+}
+
+
+sub main {
+	my($maccnt, $pps, $src, $dest)=@_;
+	my $hdr = "";
+
+	$hdr .= "010106010c02385600010000000000000000000000000000c16e5f43409c28db";
+	$hdr .= "d56c000000000000000000000000000000000000000000000000000000000000";
+	$hdr .= "0000000000000000000000000000000000000000000000000000000000000000";
+	$hdr .= "0000000000000000000000000000000000000000000000000000000000000000";
+	$hdr .= "0000000000000000000000000000000000000000000000000000000000000000";
+	$hdr .= "0000000000000000000000000000000000000000000000000000000000000000";
+	$hdr .= "0000000000000000000000000000000000000000000000000000000000000000";
+	$hdr .= "000000000000000000000000638253633501013707017903060f77fc390205dc";
+	$hdr .= "3d0701409c28dbd56c33040076a7000c097370616c6569666f6e000000000000";
+	$hdr .= "0000000000000000000000520e0104000000000206XXXXXXXXXXXXff00000000";
+
+	my $int = 1/$pps;
+
+	while(1) {
+		for(my $i=0; $i<$maccnt; $i++) {
+			my $mac = sprintf("000000%06x", $i);
+			my $pkt = $hdr;
+			$pkt =~ s/XXXXXXXXXXXX/$mac/;
+	
+			open(N,"| nemesis udp -S $src -D $dest -x 67 -y 666 -i $int -P -") || die "install nemesis!";
+			print N pack("H*",$pkt);
+			print N "";
+			close(N);
+		}
+	}
+}