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#!/usr/bin/env perl
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
#
# vqpcli.pl -s localhost -v mydomain -w 10.0.0.1 -i 2/4 -m 0010.a49f.30e3
#
use Socket;
$|=0;
#$DEBUG=1;
$DEBUG=0;
sub formatItem($$) {
my $mybuf;
undef($mybuf);
$itemheader = shift;
$itemvalue = shift;
$mybuf = $mybuf . pack("H*",(unpack("a*",$itemheader))); # Add header
$payload = pack("a*",(unpack("a*",$itemvalue)));
$length=length($payload);
$length= pack("H*",(unpack("a*",sprintf("%04x",$length))));
$mybuf = $mybuf . $length . $payload; # Add payload + length
return $mybuf;
}
sub parseOpts() {
use Getopt::Std;
my $errors = "";
getopts("s:v:w:i:m:t:c:",\%opt) or usage();
usage() if $opt{h};
my %request = (
server_ip => $opt{s} || "",
client_ip => $opt{w} || "127.0.0.1", # IP to say we are - VMPS doesn't care
port_name => $opt{i} || "Fa0/1", # Default port name to use
vlan => $opt{c} || "", # Isn't really needed.
vtp_domain => $opt{v} || "", # Is kinda important
macaddr => $opt{m} || "", # Likewise...
);
$opt{m} =~ tr/A-Z/a-z/;
$errors=$errors . "MAC address must be in nnnn.nnnn.nnnn format\n"
if ($opt{m} !~ /[a-z0-9][a-z0-9][a-z0-9][a-z0-9]\.[a-z0-9][a-z0-9][a-z0-9][a-z0-9]\.[a-z0-9][a-z0-9][a-z0-9][a-z0-9]/);
$errors=$errors . "VTP Domain must be specified\n" if ($opt{v} !~ /.*/);
$errors=$errors . "No Server name specified\n" if ($opt{s} =~ /^$/);
print STDERR $errors if ($errors);
usage() if ($errors);
$request{macaddr} =~ s/\.//g;
return %request;
}
sub usage() {
print STDERR << "EOO";
Options:
-s ip VMPS Server to query
-v domain VMPS/VTP Domain to query
-w ip client switch IP to query for
-i iface client switch Interface name (ie: Fa0/17)
-m macaddr attached device MAC address in nnnn.nnnn.nnnn format
-c vlan Vlan to reconfirm membership to
EOO
exit(1);
}
sub makeVQPrequest($) {
my $request = $_;
my $buf;
# Header...
$buf = $buf . pack("H*",(unpack("a*","01"))); # Header bit
# Is a request to join a vlan
$buf = $buf . pack("H*",(unpack("a*","01"))); # Is a request
# No error
$buf = $buf . pack("H*",(unpack("a*","00"))); # No error
# 6 data items in inbound payload
$buf = $buf . pack("H*",(unpack("a*","06")));
# Sequence number of request
$buf = $buf . pack("H*",(unpack("a*","000 1234"))); # Bogus sequence number
# Add Client switch IP
$buf = $buf . formatItem("000 0c01",(sprintf("%s",unpack("a*",inet_aton($request{client_ip})))));
# Add Port Name
$buf = $buf . formatItem("000 0c02",$request{port_name}); # Payload
# Add VLAN to confirm to buffer
$buf = $buf . formatItem("000 0c03",$request{vlan}); # Payload
# Add VTP domain name
$buf = $buf . formatItem("000 0c04",$request{vtp_domain}); # Payload
# Add UNKNOWN data to buffer...
$buf = $buf . pack("H*",(unpack("a*","000 0c07"))); # Header
$buf = $buf . pack("H*",(unpack("a*","0001 0"))); # Unknown filler
# Add MAC address to buffer
$buf = $buf . formatItem("000 0c06",sprintf("%s",pack("H*",(unpack("a*",$request{macaddr}))))); # Payload
return "$buf";
}
sub sendVQP($$) {
my $PORTNO="1589";
my $HOSTNAME= shift;
my $buf = shift;
if ($DEBUG==1) {
print "==============================\n";
print "MESSAGE SENT:\n";
open (HEX, "|/usr/bin/hexdump");
select HEX;
print $buf;
close HEX;
select STDOUT;
print "==============================\n";
}
socket(SOCKET, PF_INET, SOCK_DGRAM, getprotobyname("udp")) or die "socket: $!";
my $ipaddr = inet_aton($HOSTNAME);
my $portaddr = sockaddr_in($PORTNO, $ipaddr);
send(SOCKET, $buf, 0, $portaddr) == length($buf)
or die "cannot send to $HOSTNAME($PORTNO): $!";
$portaddr = recv(SOCKET, $buf, 1500, 0); # or die "recv: $!";
if ($DEBUG==1) {
print "MESSAGE RECV:\n";
open (HEX, "|/usr/bin/hexdump");
select HEX;
print $buf;
close HEX;
select STDOUT;
print "==============================\n";
}
return "$buf";
}
sub parseVQPresp($) {
my %response = (
status => "",
vlan => "",
macaddr => "",
);
my $buf = shift;
$buf =~ /^(.)(.)(.)(.)(....)/;
my ($header,$type,$status,$size,$sequence) =
(ord($1),ord($2),ord($3),ord($4),pack("a*",(unpack("H*",$5))));
$buf =~ s/^........//;
$response{status}="ALLOW" if ($status == 0);
$response{status}="DENY" if ($status == 3);
$response{status}="SHUTDOWN" if ($status == 4);
$response{status}="WRONG_DOMAIN" if ($status == 5);
for ($i=1;$i<=$size;$i++) {
$payload_type=pack("a*",(unpack("H*",substr($buf,0,4))));
$payload_size=sprintf("%d",hex(pack("a*",(unpack("H*",substr($buf,4,2))))));
$payload=substr($buf,6,$payload_size);
if ($payload_type eq "00000c03") {
$response{vlan}=$payload;
} elsif ($payload_type eq"00000c08") {
$response{macaddr}=pack("a*",(unpack("H*",$payload)));
}
substr($buf,0,($payload_size + 6)) = "";
}
return %response;
}
%request=parseOpts();
$buf = makeVQPrequest(%request);
$buf = sendVQP($request{server_ip},$buf);
%response = parseVQPresp($buf);
print "Vlan: $response{vlan}\nMAC Address: $response{macaddr} \nStatus: $response{status}\n";
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