qubes-network-topology

#!/usr/bin/python2
# -*- encoding: utf8 -*-
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2016  Laszlo Zrubecz <mail@zrubi.hu>
#
# 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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
#

from qubes.qubes import QubesVmCollection
from qubes.qubes import QubesHost
from qubes.qubes import QubesException
from optparse import OptionParser
import sys

import pprint


usage = "usage: %prog [options] <vm-name>"
parser = OptionParser (usage)

parser.add_option("--dot", dest="dot",
                  action="store_true", default=False,
                  help="Output in DOT format")

(options, args) = parser.parse_args ()

qvm_collection = QubesVmCollection()
qvm_collection.lock_db_for_reading()
qvm_collection.load()
qvm_collection.unlock_db()

#print qvm_collection

data = {}
for vm in qvm_collection.values():
    data_row = {}
    data_row['name'] = vm.name

    if vm.is_netvm() and not vm.is_proxyvm():
        data_row['netvm'] = 'n/a'
    elif vm.netvm is None:
        data_row['netvm'] = '-'
    else:
        data_row['netvm'] = vm.netvm.name

    data_row['type'] = vm.type
    data_row['ip'] = vm.ip
    data_row['ip_back'] = vm.gateway if vm.is_netvm() else 'n/a'
    data_row['gw'] = vm.netvm.gateway if vm.netvm else 'n/a'
    data_row['pci'] = vm.pcidevs

    data[vm.qid] = data_row 
    #print data_row 

#for vm in data:
#    print vm

#pprint.pprint(data)

if options.dot:
    print "digraph Qubes {"

    for vmid in data:
        if data[vmid]['netvm'] == "-" or data[vmid]['netvm'] == "n/a":
            print "   \"%s\"" % data[vmid]['name']
        else:
            print "  \"%s\" -> \"%s\"" % (data[vmid]['name'],data[vmid]['netvm'])
    
    print "}"

qvm_collection[vm.netvm.qid].name -> vm.netvm.name :)

Proposal to integrate this (or a similar tool) into Qubes: QubesOS/qubes-issues#2575

Of course this is still just a barebone.
We can use several other graph features to make the result more useful :)