Re: Creating adhoc wireless Network

[nexus aflb com]

OK rewritting all the stuff into my little class, I got another issue now :)

I'm using The Delete Call from NetworkManagerSettings.Connection Interface.

All is going like a charm EXCEPT : I got still the entry in NM but it
does'nt exist anymore on the system.
Maybe a refresh is missing somewhere.

So, the pont is, how to tell to nm-applet to refresh the list of
connection that exists ?

Thanks


> On Tue, 2009-07-07 at 03:54 -0400, nexus aflb com wrote:
>> > On Mon, 2009-07-06 at 11:18 -0400, nexus aflb com wrote:
>> >> Hi Dan,
>> >>
>> >> I'm playing with the script you provide me but I have a problem :
>> >>
>> >> File "Create_Wireless.py", line 135, in <module>
>> >>     if props['DeviceType'] == 2:   # wifi
>> >> KeyError: 'DeviceType'
>> >>
>> >> if I execute step by steps :
>> >>
>> >> >>> print nm_iface.GetDevices()
>> >> dbus.Array([dbus.ObjectPath('/org/freedesktop/Hal/devices/net_00_24_81_56_2e_52'),
>> >> dbus.ObjectPath('/org/freedesktop/Hal/devices/net_00_22_fa_46_76_9a')],
>> >> signature=dbus.Signature('o'))
>> >> >>> dev_proxy =
>> >> sys_bus.get_object('org.freedesktop.NetworkManager','/org/freedesktop/Hal/devices/net_00_22_fa_46_76_9a')
>> >> >>> print dev_proxy
>> >> <ProxyObject wrapping <dbus._dbus.SystemBus (system) at 0xb7a5811c>
>> :1.7
>> >> /org/freedesktop/Hal/devices/net_00_22_fa_46_76_9a at 0xb7a5a80c>
>> >> >>> dev_props_iface = dbus.Interface(dev_proxy,
>> >> 'org.freedesktop.DBus.Properties')
>> >> >>> print dev_props_iface
>> >> <Interface <ProxyObject wrapping <dbus._dbus.SystemBus (system) at
>> >> 0xb7a5811c> :1.7 /org/freedesktop/Hal/devices/net_00_22_fa_46_76_9a
>> at
>> >> 0xb7a5a80c> implementing 'org.freedesktop.DBus.Properties' at
>> >> 0xb7a5a9ac>
>> >> >>> print
>> >> dev_props_iface.GetAll('org.freedesktop.NetworkManager.Device')
>> >> dbus.Dictionary({}, signature=dbus.Signature('sv'))
>> >>
>> >> It seems empty ! What's wrong ?
>> >
>> > What version of dbus-glib do you have?  What does 'nm-tool' print out
>> > when you run it?
>> >
>> > Dan
>> >
>>
>> Version provided by SLED11
>>
>> dbus-1-glib-0.76-34.3
>
> Ok, that's not quite new enough, anything < 0.77 has a bug with GetAll
> that causes properties to not be found.  The commit in question is:
>
> d1b80d803a0268bd4b3dd5b9a9522230461f2947
>
> Author: Dan Williams <dcbw redhat com>  2008-06-05 17:57:53
> Committer: Colin Walters <walters verbum org>  2008-06-05 17:57:53
> Follows: dbus-glib_0.76
> Precedes: dbus-glib_0.78
>
>     Bug 16114 [patch] wincaps-to-uscore property names for GetAll()
>
>     	* dbus/dbus-gobject.c: We need to uscore property names
>     	so that we actually find the right properties.
>
>
> but, the good news is that you could do:
>
> dbus_props_iface.Get('org.freedesktop.NetworkManager.Device', '<property
> name>')
>
> and get the properties you care about individually instead of all of
> them at once.  Somewhat less efficient, but it'll work.
>
> Dan
>
>> dbus-1-1.2.10-3.9.1
>> dbus-1-python-0.83.0-22.10
>>
>> nm-tool print the two interfaces with parameters :
>>
>> NetworkManager Tool
>>
>> State: connected
>>
>> - Device: eth0
>> ----------------------------------------------------------------
>>   Type:              Wired
>>   Driver:            tg3
>>   State:             connected
>>   Default:           yes
>>   HW Address:        00:24:81:56:2E:52
>>
>>   Capabilities:
>>     Supported:       yes
>>     Carrier Detect:  yes
>>     Speed:           100 Mb/s
>>
>>   Wired Settings
>>
>>   IPv4 Settings:
>>     Address:         10.82.109.86
>>     Prefix:          24 (255.255.255.0)
>>     Gateway:         10.82.109.254
>>
>>     DNS:             10.82.161.3
>>     DNS:             10.68.161.3
>>
>>
>> - Device: eth1
>> ----------------------------------------------------------------
>>   Type:              802.11 WiFi
>>   Driver:            iwlagn
>>   State:             connected
>>   Default:           no
>>   HW Address:        00:22:FA:46:76:9A
>>
>>   Capabilities:
>>     Supported:       yes
>>
>>   Wireless Settings
>>     WEP Encryption:  yes
>>     WPA Encryption:  yes
>>     WPA2 Encryption: yes
>>
>>   Wireless Access Points(* = Current AP)
>>     TESTIPSL:        Infra, 00:03:2F:1D:61:BF, Freq 2437 MHz, Rate 54
>> Mb/s, Strength 79 WEP
>>     *iSync:          Ad-Hoc, D6:08:0C:12:06:49, Freq 2412 MHz, Rate 0
>> Mb/s, Strength 0
>>
>>   IPv4 Settings:
>>     Address:         10.42.44.1
>>     Prefix:          24 (255.255.255.0)
>>     Gateway:         0.0.0.0
>>
>>
>> >> Thanks
>> >>
>> >>
>> >> > On Wed, 2009-07-01 at 12:28 -0400, Dan Williams wrote:
>> >> >> On Wed, 2009-07-01 at 11:26 -0400, nexus aflb com wrote:
>> >> >> > Thanks for this quick answer.
>> >> >> >
>> >> >> > That's what I though. Adding a new connection isnot easy to
>> do...
>> >> >> >
>> >> >> > when you say "programmatically ask the system settings service
>> to
>> >> >> create it"
>> >> >> >
>> >> >> > What do you mean ? Doing the same stuff as nm-applet but
>> hardcoded
>> >> ?
>> >> >>
>> >> >> Same way nm-connection-editor asks the system settings service to
>> >> create
>> >> >> a new connection when the user hits "Apply": you call the
>> >> >> AddConnection() method on the
>> >> >> org.freedesktop.NetworkManagerSettings.System interface with the
>> >> >> connection details you want to set.
>> >> >>
>> >> >> Unfortunately we didn't define that method to return the object
>> path
>> >> of
>> >> >> the newly created connection in 0.7 (will probably be fixed in
>> 0.8),
>> >> so
>> >> >> you have to wait for the NewConnection signal that the
>> >> >> system-settings-service emits, look for the UUID of the connection
>> >> you
>> >> >> just created to get the object path, and then tell NM to activate
>> >> that
>> >> >> connection.
>> >> >>
>> >> >> It's pretty straightforward actually, once you know what needs to
>> be
>> >> >> done.  If PolicyKit throws up a dialog, use
>> >> polkit-gnome-authorization
>> >> >> to allow the user to always have the
>> >> >> org.freedesktop.network-manager-settings.system.modify permission
>> and
>> >> >> the user won't ever get asked.
>> >> >
>> >> > Check out the attached script.  It will create a WEP-enabled adhoc
>> >> > connection if that connection (identified by UUID) doesn't already
>> >> > exist, and then direct NetworkManager to activate that connection.
>> >> The
>> >> > script is somewhat longer than it needs to be, simply because I
>> made
>> >> it
>> >> > more readable, added comments so you can figure out what's going
>> on,
>> >> and
>> >> > put some reasonable error checking in.
>> >> >
>> >> > Dan
>> >> > ----
>> >> >
>> >> > #!/bin/env python
>> >> > # -*- Mode: Python; tab-width: 4; indent-tabs-mode: nil;
>> >> c-basic-offset: 4
>> >> > -*-
>> >> > #
>> >> > # Copyright (C) 2009 Red Hat, Inc.
>> >> > #
>> >> > # 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.
>> >> > #
>> >> >
>> >> > import dbus
>> >> > import glib
>> >> > import sys
>> >> > import posix
>> >> > import time
>> >> >
>> >> > uuid = "cabfaf9e-4043-4afb-8506-0e6f4a225636"
>> >> >
>> >> > s_con = { 'id':          'My AdHoc',
>> >> >           'uuid':        uuid,
>> >> >           'type':        '802-11-wireless',
>> >> >           'autoconnect': False,
>> >> >           'name':        'connection' }
>> >> >
>> >> > s_wifi = { 'ssid':     dbus.ByteArray("foobar"),
>> >> >            'mode':     'adhoc',
>> >> >            'security': '802-11-wireless-security',
>> >> >            'name':     '802-11-wireless' }
>> >> >
>> >> > s_wsec = { 'key-mgmt': 'none',
>> >> >            'wep-key0': '0123456789abcdef0123456789',
>> >> >            'name':     '802-11-wireless-security' }
>> >> >
>> >> > s_ip4 = { 'method': 'link-local',
>> >> >           'name':   'ipv4' }
>> >> >
>> >> > con = { 'connection': s_con,
>> >> >         '802-11-wireless': s_wifi,
>> >> >         '802-11-wireless-security': s_wsec,
>> >> >         'ipv4': s_ip4 }
>> >> >
>> >> > # init dbus
>> >> > sys_bus = dbus.SystemBus()
>> >> > ses_bus = dbus.SessionBus()
>> >> >
>> >> > ss_proxy =
>> >> > sys_bus.get_object('org.freedesktop.NetworkManagerSystemSettings',
>> >> >                           '/org/freedesktop/NetworkManagerSettings')
>> >> > ss_iface = dbus.Interface(ss_proxy,
>> >> > 'org.freedesktop.NetworkManagerSettings')
>> >> > ss_sys_iface = dbus.Interface(ss_proxy,
>> >> > 'org.freedesktop.NetworkManagerSettings.System')
>> >> >
>> >> > nm_proxy = sys_bus.get_object('org.freedesktop.NetworkManager',
>> >> >                               '/org/freedesktop/NetworkManager')
>> >> > nm_iface = dbus.Interface(nm_proxy,
>> 'org.freedesktop.NetworkManager')
>> >> >
>> >> > pk_proxy =
>> >> > ses_bus.get_object('org.freedesktop.PolicyKit.AuthenticationAgent',
>> >> '/')
>> >> > pk_iface = dbus.Interface(pk_proxy,
>> >> > 'org.freedesktop.PolicyKit.AuthenticationAgent')
>> >> >
>> >> > def find_connection(requested_uuid):
>> >> >     for c in ss_iface.ListConnections():
>> >> >         # get the details of the connection
>> >> >         c_proxy =
>> >> > sys_bus.get_object('org.freedesktop.NetworkManagerSystemSettings',
>> >> > c)
>> >> >         c_iface = dbus.Interface(c_proxy,
>> >> > 'org.freedesktop.NetworkManagerSettings.Connection')
>> >> >         settings = c_iface.GetSettings()
>> >> >         if settings['connection']['uuid'] == requested_uuid:
>> >> >             # found our connection
>> >> >             return c
>> >> >     return None
>> >> >
>> >> > def try_add(connection):
>> >> >     try:
>> >> >         # Ask the system settings service to create the connection
>> >> >         ss_sys_iface.AddConnection(connection)
>> >> >         return None
>> >> >     except Exception, e:
>> >> >         parts = str(e).split(' ')
>> >> >         if
>> >> > parts[0].find('org.freedesktop.NetworkManagerSettings.System.NotPrivileged')
>> >> > < 0:
>> >> >             # not a permission denied, give up and exit
>> >> >             print e
>> >> >             sys.exit(1)
>> >> >         # yay, permission denied, we can handle this
>> >> >         return parts[1]
>> >> >
>> >> > # MAIN PROGRAM
>> >> >
>> >> > con_path = find_connection(uuid)
>> >> > if not con_path:
>> >> >     # Try to create the connection, which could fail if we need
>> >> > authorization.
>> >> >     # If auth is required, get the auth and try adding it again
>> >> >     action = try_add(con)
>> >> >     if action:
>> >> >         gained = pk_iface.ObtainAuthorization(action, 0,
>> >> posix.getpid())
>> >> >         if gained:
>> >> >             # Yay, we have the privilege now, try adding again
>> >> >             action = try_add(con)
>> >> >             if action:
>> >> >                 # hmm, something went wrong and PolicyKit wasn't
>> able
>> >> to
>> >> > auth the user
>> >> >                 sys.exit(1)
>> >> >
>> >> >             con_path = find_connection(uuid)
>> >> >
>> >> > # Check again in case it was just added
>> >> > if not con_path:
>> >> >     print "Couldn't get newly created connection from system
>> settings"
>> >> >
>> >> > # Find a wifi device to activate this connection on
>> >> > dev_path = None
>> >> > for dev in nm_iface.GetDevices():
>> >> >     dev_proxy =
>> sys_bus.get_object('org.freedesktop.NetworkManager',
>> >> dev)
>> >> >     dev_props_iface = dbus.Interface(dev_proxy,
>> >> > 'org.freedesktop.DBus.Properties')
>> >> >     props =
>> >> > dev_props_iface.GetAll('org.freedesktop.NetworkManager.Device')
>> >> >     if props['DeviceType'] == 2:   # wifi
>> >> >         dev_path = dev
>> >> >         break
>> >> >
>> >> > if not dev_path:
>> >> >     print "No wifi devices available"
>> >> >     sys.exit(1)
>> >> >
>> >> > # Now ask NM to activate that connection
>> >> > active_path =
>> >> > nm_iface.ActivateConnection('org.freedesktop.NetworkManagerSystemSettings',
>> >> >                                           con_path, dev_path, "/")
>> >> > if not active_path:
>> >> >     print "Couldn't activate connection"
>> >> >     sys.exit(1)
>> >> >
>> >> > # Wait for the connection to become active
>> >> > active_proxy = sys_bus.get_object('org.freedesktop.NetworkManager',
>> >> > active_path)
>> >> > active_props_iface = dbus.Interface(active_proxy,
>> >> > 'org.freedesktop.DBus.Properties')
>> >> >
>> >> > state = 0
>> >> > while state != 2:  # 2 == activated
>> >> >     state =
>> >> > active_props_iface.Get('org.freedesktop.NetworkManager.Connection.Active',
>> >> > 'State')
>> >> >     if state != 2:
>> >> >         print "waiting for connection to become active..."
>> >> >         time.sleep(1)
>> >> >
>> >> > print "activated!"
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>>
>
>