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#!/usr/bin/python

from os import O_NONBLOCK
from sys import stdin, stdout, exit, version_info, argv
from fcntl import fcntl, F_GETFL, F_SETFL
import glib
import dbus
import dbus.mainloop.glib
import gobject
import argparse

WPA_NAME='fi.w1.wpa_supplicant1'
WPA_INTF='fi.w1.wpa_supplicant1'
WPA_PATH='/fi/w1/wpa_supplicant1'
WPA_IF_INTF = WPA_INTF + '.Interface'
WPA_P2P_INTF = WPA_IF_INTF + '.P2PDevice'
WPA_GROUP_INTF = WPA_INTF + '.Group'
WPA_PEER_INTF = WPA_INTF + '.Peer'
DBUS_PROPERTIES_INTF = 'org.freedesktop.DBus.Properties'

P2P_GROUP_CAPAB_GROUP_OWNER = 1 << 0

class ArgFields:
    for field in ('help', 'metavar'):
        exec('{}="{}"'.format(field, field))

class InputLine:
    def __init__(self, handler):
        self.line = ''
        self.handler = handler

        flags = fcntl(stdin.fileno(), F_GETFL)
        flags |= O_NONBLOCK
        fcntl(stdin.fileno(), F_SETFL, flags)
        glib.io_add_watch(stdin, glib.IO_IN, self.input_cb)

        self.prompt()

    def prompt(self):
        self.line = ''
        print '> ',
        stdout.flush()

    def input_cb(self, fd, event):
        if event != glib.IO_IN:
            return

        self.line += fd.read();
        for line in self.line.split('\n'):
            line = line.strip()
            if len(line) == 0:
                break

            self.handler(line.strip())

        self.prompt()

        return True

def error_print(ex):
    print 'Command Error: %s' % ex

def checkarg(nb_args = 0, min_args = False):
    def under(function):
        def wrapper(*args, **kwargs):
            resuls = True

            if min_args:
                result = len(args[1]) < nb_args
            else:
                result = len(args[1]) != nb_args

            if result:
                raise Exception('Command %s takes %s arguments' %
                                    (function.__name__, nb_args))
            return function(*args, **kwargs)
        return wrapper
    return under

def print_dict(d):
    for k in d:
        try:
            if type(d[k]) is dbus.Byte:
                print 'Key %s --> 0x%x' % (k, d[k])
            else:
                print 'Key %s --> %s' % (k, d[k])
        except:
            print "Error: Key %s content cannot be printed" % k
            pass

def print_tuple(t):
    for e in t:
        if type(e) is dbus.Dictionary:
            print_dict(e)
        else:
            print 'Element: %s' % e

class Wpa_s:
    def __init__(self, bus, iface_name, command):
        self.wpa = dbus.Interface(bus.get_object(WPA_NAME, WPA_PATH), WPA_INTF)
        bus.add_signal_receiver(self.__wpa_property_changed, path=WPA_PATH,
                                member_keyword='signal')
        bus.add_signal_receiver(self.__InterfaceAdded, path=WPA_PATH,
                                signal_name='InterfaceAdded')
        bus.add_signal_receiver(self.__InterfaceRemoved, path=WPA_PATH,
                                signal_name='InterfaceRemoved')
        self.__reset()

        self.bus = bus

        self.debug = False

        self.line_in = InputLine(self.__command)

        if iface_name:
            try:
                self.create_if([iface_name])
            except:
                print "Error creating interface: %s" % iface_name

        if len(command.strip(' ')):
            self.__command(command)

    def help(self, args):
        list = self.command_list.keys()
        list.sort()
        for key in list:
            help = ''
            if (self.command_list[key].has_key(ArgFields.help)):
                help = self.command_list[key][ArgFields.help]

            print "%s\t%s" % (key.rjust(25), help.ljust(50))

    def __command(self, cmd_line):
        cmd = cmd_line.split(' ')

        try:
            func = getattr(self, cmd[0])
        except Exception, e:
            print 'Error: command unknown - %s' % e
            return

        try:
            func(cmd[1:])
        except Exception, e:
            error_print(e)

    def __wpa_property_changed(*args, **kwargs):
        print 'WPA - Signal:  %s' % kwargs.get('signal')

    def __if_property_changed(*args, **kwargs):
        signal = kwargs.get('signal')
        print 'IF - Signal:  %s' % signal

        if signal == 'BSSAdded':
            return

        if args[0].debug:
            print_tuple(args[1:])

    def __p2p_property_changed(*args, **kwargs):
        print 'IF P2P - Signal:  %s' % kwargs.get('signal')
        if args[0].debug:
            print_tuple(args[1:])

    def __peer_if_p2p_property_changed(*args, **kwargs):
        print 'Peer - ',
        args[0].__p2p_property_changed(*args, **kwargs)

    def __DeviceFound(self, object_path):
        self.peers[object_path] = None

        peer = self.bus.get_object(WPA_INTF, object_path)
        peer_if = dbus.Interface(peer, DBUS_PROPERTIES_INTF)

        self.bus.add_signal_receiver(self.__peer_if_p2p_property_changed,
                                     dbus_interface=WPA_PEER_INTF,
                                     path=object_path, member_keyword='signal')

        self.peers[object_path] = peer_if.GetAll(WPA_PEER_INTF)

        if self.debug:
            print_dict(self.peers[object_path])

    def __DeviceLost(self, object_path):
        if object_path in self.peers:
            del self.peers[object_path]

    def __PeerJoined(self, object_path):
        print 'Peer %s joined' % object_path

    def __PeerDisconnected(self, object_path):
        print 'Peer %s disconnected' % object_path

    def __group_if_property_changed(*args, **kwargs):
        print 'Group - ',
        args[0].__if_property_changed(*args, **kwargs)

    def __group_if_p2p_property_changed(*args, **kwargs):
        print 'Group - ',
        args[0].__p2p_property_changed(*args, **kwargs)

    def __GroupFinished(self, properties):
        print 'Group running on %s is being removed' % ifname
        self.group_obj = self.group_if = self.group_iface_path = None

        if self.debug:
            print_dict(properties)

    def __InvitationResult(self, response):
        print 'Invitation result status: %d ' % response['status']

        if response.has_key('bssid'):
            print 'bssid: %s' % response['bssid']

        if self.debug:
            print_dict(response)

    def __GroupStarted(self, properties):
        self.group_obj = properties['group_object']
        self.bus.add_signal_receiver(self.__PeerJoined,
                                dbus_interface=WPA_GROUP_INTF,
                                path=self.group_obj,
                                signal_name='PeerJoined')
        self.bus.add_signal_receiver(self.__PeerDisconnected,
                                dbus_interface=WPA_GROUP_INTF,
                                path=self.group_obj,
                                signal_name='PeerDisconnected')

        self.group_iface_path = properties['interface_object']
        self.group_if = dbus.Interface(self.bus.get_object(WPA_INTF,
                                       self.group_iface_path),
                                       WPA_P2P_INTF)
        self.bus.add_signal_receiver(self.__group_if_property_changed,
                                dbus_interface=WPA_IF_INTF,
                                path=self.group_iface_path,
                                member_keyword='signal')
        self.bus.add_signal_receiver(self.__group_if_p2p_property_changed,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.group_iface_path,
                                member_keyword='signal')
        self.bus.add_signal_receiver(self.__GroupFinished,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.group_iface_path,
                                signal_name='GroupFinished')
        self.bus.add_signal_receiver(self.__InvitationResult,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.iface_path,
                                signal_name='InvitationResult')

        if self.debug:
            group = dbus.Interface(self.bus.get_object(WPA_INTF,
                                                       self.group_obj),
                                                       DBUS_PROPERTIES_INTF)
            print_dict(group.GetAll(WPA_GROUP_INTF))

    def __ServiceDiscoveryResponse(self, response):
        peer = response['peer_object']
        if peer in self.peers:
            print 'Peer %s has this TLVs:' % (self.peers[peer]['DeviceName'])
            print response['tlvs']

    def __InterfaceAdded(self, path, properties):
        print 'Interface %s Added (%s)' % (properties['Ifname'], path)
        if self.debug:
            print_dict(properties)
            p2p = dbus.Interface(self.bus.get_object(WPA_INTF,
                                 path), DBUS_PROPERTIES_INTF)
            print_dict(p2p.GetAll(WPA_P2P_INTF))

    def __InterfaceRemoved(self, path):
        print 'Interface Removed (%s)' % (path)

    def __listen_if_signals(self):
        self.bus.add_signal_receiver(self.__if_property_changed,
                                dbus_interface=WPA_IF_INTF,
                                path=self.iface_path,
                                member_keyword='signal')
        self.bus.add_signal_receiver(self.__p2p_property_changed,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.iface_path,
                                member_keyword='signal')
        self.bus.add_signal_receiver(self.__GroupStarted,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.iface_path,
                                signal_name='GroupStarted')
        self.bus.add_signal_receiver(self.__DeviceFound,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.iface_path,
                                signal_name='DeviceFound')
        self.bus.add_signal_receiver(self.__DeviceLost,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.iface_path,
                                signal_name='DeviceLost')
        self.bus.add_signal_receiver(self.__ServiceDiscoveryResponse,
                                dbus_interface=WPA_P2P_INTF,
                                path=self.iface_path,
                                signal_name='ServiceDiscoveryResponse')

    def __reset(self):
        self.iface_path = self.iface_name = self.iface = None
        self.p2p = self.group_if = self.group_obj = None
        self.peers = {}

    def __set_if(self, iface_name):
        self.iface = dbus.Interface(self.bus.get_object(WPA_INTF,
                                    self.iface_path), WPA_IF_INTF)
        self.p2p = dbus.Interface(self.bus.get_object(WPA_INTF,
                                    self.iface_path), WPA_P2P_INTF)

        p2p_if = dbus.Interface(self.p2p, DBUS_PROPERTIES_INTF)
        p2p_if.Set(WPA_P2P_INTF, 'P2PDeviceConfig',
                   dbus.Dictionary({ 'DeviceName' : 'ConnManP2P' },
                                   signature='sv'))
        print 'Interface %s: %s' % (iface_name, self.iface_path)
        self.iface_name = iface_name
        self.__listen_if_signals()

    @checkarg()
    def enable_debug(self, args):
        self.debug = True

    @checkarg()
    def disable_debug(self, args):
        self.debug = False

    @checkarg(nb_args=1)
    def create_if(self, args):
        self.__reset()
        self.iface_path = self.wpa.CreateInterface(({ 'Ifname' : args[0]} ))
        self.__set_if(args[0])

    @checkarg(nb_args=1)
    def get_if(self, args):
        self.__reset()
        self.iface_path = self.wpa.GetInterface(args[0])
        self.__set_if(args[0])

    @checkarg()
    def del_if(self, args = None):
        if not self.iface_path:
            return

        self.wpa.RemoveInterface(self.iface_path)
        print 'Interface %s removed' % self.iface_name
        self.__reset()

    @checkarg()
    def scan(self, args = None):
        if not self.iface:
            return

        self.iface.Scan(({ 'Type': 'passive' }))
        print 'Scan started'

    @checkarg()
    def quit(self, args = None):
        self.del_if(args)
        exit(0)

    @checkarg(nb_args=1)
    def set_command_list(self, command_list):
        self.command_list = command_list[0]

    @checkarg()
    def p2p_find(self, args = None):
        if not self.p2p:
            return

        self.p2p.Find(({}))

    @checkarg()
    def p2p_stop_find(self, args = None):
        if not self.p2p:
            return

        self.p2p.StopFind()

    @checkarg()
    def p2p_peers(self, args = None):
        if not self.iface:
            return

        for p in self.peers:
            print 'Peer Name=%s' % (self.peers[p]['DeviceName'])

    def __find_peer(self, peer_name, ret_object_path = False):
        if len(self.peers) == 0:
            return None

        peer = None
        for p in self.peers:
            if self.peers[p]['DeviceName'] == peer_name:
                peer = self.peers[p]
                break

        if not peer:
            print 'No peer found under the name: %s' % peer_name
            p = None

        if ret_object_path:
            return p
        else:
            return peer

    @checkarg(nb_args = 1)
    def p2p_peer(self, args):
        peer_path = self.__find_peer(args[0], True)
        if peer_path:
            peer = self.bus.get_object(WPA_INTF, peer_path)
            peer_if = dbus.Interface(peer, DBUS_PROPERTIES_INTF)
            self.peers[peer_path] = peer_if.GetAll(WPA_PEER_INTF)

            print_dict(self.peers[peer_path])

    @checkarg(nb_args = 1)
    def p2p_connect(self, args):
        if not self.p2p:
            return

        peer = self.__find_peer(args[0])
        if not peer:
            return

        peer_path = self.__find_peer(args[0], True)

        if (peer['groupcapability'] & P2P_GROUP_CAPAB_GROUP_OWNER ==
                                            P2P_GROUP_CAPAB_GROUP_OWNER):
            print 'Joining an existing P2P group'
            pin = self.p2p.Connect(({ 'peer' : peer_path,
                                      'wps_method' : 'pbc',
                                      'join' : True,
                                      'go_intent' : 0 }))
        else:
            print 'Associating with another P2P device'
            pin = self.p2p.Connect(({ 'peer' : peer_path,
                                      'wps_method' : 'pbc',
                                      'join' : False,
                                      'go_intent' : 7 }))
            if not pin:
                print 'WPS PIN in use: %s' % pin

    @checkarg(nb_args = 1)
    def p2p_disconnect(self, args):
        if not self.p2p:
            return

        peer = self.__find_peer(args[0])
        if not peer:
            return

        if not self.group_if:
            print 'Peer %s is not connected' % (peer['DeviceName'])
            return

        self.group_if.Disconnect()

    @checkarg()
    def p2p_group_add(self, args):
        if not self.p2p:
            return

        self.p2p.GroupAdd(({ 'persistent' : dbus.Boolean(1) }))

    @checkarg()
    def p2p_group_remove(self, args):
        if not self.group_if:
            return

        self.group_if.Disconnect()

    @checkarg()
    def p2p_group(self, args):
        if not self.group_obj:
            return

        group = dbus.Interface(self.bus.get_object(WPA_INTF,
                               self.group_obj), DBUS_PROPERTIES_INTF)
        print_dict(group.GetAll(WPA_GROUP_INTF))

    @checkarg()
    def p2p_flush(self, args):
        if not self.p2p:
            return

        self.p2p.Flush()

    @checkarg()
    def p2p_serv_disc_req(self, args = None):
        if not self.p2p:
            return

        """ We request all kind of services """
        sd_req = dbus.Array(signature='y', variant_level=1)
        for a in [2,0,0,1]:
            sd_req.append(dbus.Byte(a))

        ref = self.p2p.ServiceDiscoveryRequest(({ 'tlv' : sd_req }))
        print 'Service discovery reference: %s' % ref

    @checkarg(nb_args = 1)
    def p2p_serv_disc_cancel_req(self, args):
        if not self.p2p:
            return

        self.p2p.ServiceDiscoveryCancelRequest(int(args[0]))

    @checkarg(nb_args = 3)
    def p2p_service_add(self, args):
        if not self.p2p:
            return

        service = { 'service_type' : args[0] }
        if args[0] == 'upnp':
            service['version'] = args[1]
            service['service'] = args[2]
        elif args[0] == 'bonjour':
            service['query'] = args[1]
            service['response'] = args[2]
        else:
            print 'Unknown service: %s' % args[0]
            return

        self.p2p.AddService((service))

    @checkarg(nb_args = 2, min_args = True)
    def p2p_service_del(self, args):
        if not self.p2p:
            return

        service = { 'service_type' : args[0] }
        if args[0] == 'upnp':
            service['version'] = args[1]
            service['service'] = args[2]
        elif args[0] == 'bonjour':
            service['query'] = args[1]
        else:
            print 'Unknown service: %s' % args[0]
            return

        self.p2p.DeleteService((service))

    @checkarg()
    def p2p_service_flush(self, args = None):
        if not self.p2p:
            return

        self.p2p.FlushService()

    @checkarg(nb_args = 1)
    def p2p_invite(self, args):
        if not self.p2p or not self.group_if:
            return

        peer_path = self.__find_peer(args[0], True)

        if not peer_path:
            return

        self.group_if.Invite({ 'peer' : peer_path})

def build_args(parser):
    parser.add_argument('-d', default=False, action='store_true',
                       dest='debug', help='enable debug')
    parser.add_argument('-i', metavar='<interface>', dest='ifname',
                        help='interface name')

    command = {}
    command['quit'] = {}
    command['enable_debug'] = {}
    command['disable_debug'] = {}
    command['create_if'] = {ArgFields.help:'<iface_name> - create interface'}
    command['get_if'] = {ArgFields.help:'<iface_name> - get interface'}
    command['del_if'] = {ArgFields.help:'removes current interface'}
    command['scan'] = {}
    command['p2p_find'] = {}
    command['p2p_stop_find'] = {}
    command['p2p_flush'] = {}
    command['p2p_group_add'] = {ArgFields.help:'adds an autonomous group'}
    command['p2p_group_remove'] = {}
    command['p2p_group'] = {}
    command['p2p_peers'] = {}
    command['p2p_peer'] = {ArgFields.help:'<p2p device name> - get info for a '
                                'peer'}
    command['p2p_connect'] = {ArgFields.help:'<p2p device name>'}
    command['p2p_disconnect'] = {ArgFields.help:'<p2p device name>'}
    command['p2p_serv_disc_req'] = {}
    command['p2p_serv_disc_cancel_req'] = {ArgFields.help:'<identifier>'}
    command['p2p_service_add'] = {ArgFields.help:'<service type> '
                                  '<version/query> <service/response>'}
    command['p2p_service_del'] = {ArgFields.help:'<service type> '
                                  '<version/query> [<service>]'}
    command['p2p_service_flush'] = {}
    command['p2p_invite'] = {ArgFields.help:'<p2p device name>'}

    command_list = command.keys()
    command_list.sort()
    subparsers = parser.add_subparsers(help='commands', dest='command')
    subparsers.add_parser('')
    for key in command_list:
        help=None
        metavar=None
        if command[key].has_key(ArgFields.help):
            help = command[key][ArgFields.help]
        if command[key].has_key(ArgFields.metavar):
            metavar = command[key][ArgFields.metavar]
        command_parser = subparsers.add_parser(key, help=help)
        command_parser.add_argument(key, nargs='*', metavar=metavar, help=help)

    return command

def main():
    if version_info.major != 2:
        print 'You need to run this under Python 2.x'
        exit(1)

    parser = argparse.ArgumentParser(description='Connman P2P Test')

    command_list = build_args(parser)

    argv[1:] += ['']

    args = parser.parse_args(argv[1:])

    dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

    opts = []
    if args.command:
        opts = getattr(args, args.command)

    params = ''
    if opts and len(opts[0]):
        params = ' ' + ''.join(opts)

    bus = dbus.SystemBus()

    mainloop = gobject.MainLoop()

    wpa_s = Wpa_s(bus, args.ifname, args.command + params)

    if (args.debug):
            wpa_s.enable_debug([])

    wpa_s.set_command_list([command_list])

    mainloop.run()

if __name__ == '__main__':
    main()