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= What is it =

w32g is a dbus script to toggle 2g/3g when connected/disconnected to wifi.

If there's a call, it will delay the toggling.

= Configuration =

The configuration documentation is at the beginning w32g.conf. You can copy it to /home/user/.w32g.conf and modify it :

[w32g]
  
  ### the comment reflect the default configuration
  ### true is true (case insensitive), everything else is false
  
  ### the command used to test the wifi connection before downgrading to 2g
  ### if you don't want to do test just delete after =
  # connection_test = sudo /bin/ping -c 1 www.google.com
  
  ### notification message when going to 3g
  # message_on_idle = 3G cellular mode set
  ### notification message when going to 2g
  # message_on_connected = 2G (GSM) cellular mode set
  
  ### shall we go back to 3g when wlan disconnect ?
  #### if you want to have false just delete after =
  # change_on_idle = true
  ### shall we go back to dual or 3g ?
  # change_to_dual = true
  
  ### if wait_on_call is a integer greater than 0, the program will wait
  ### all this time to toggle to 2g/3g. After this time it will exit
  ### without toggling.
  ### if wait_on_call is 0 or lesser, w32g will exit without toggling
  # wait_on_call = 90
  
  ### if you want go to 2g only when connected to some wlan you can add their wlan id here
  ### you can find the wlan id using the command 
  ### gconftool-2 -R /system/osso/connectivity/IAP
  ### For example :
  ### wifi = 91f493fb-7c89-4fc6-ac2c-b822923dde45 9ee5dd55-9a32-4ee9-9131-c464ad31d907
  # wifi =

= Script =

And you must copy the program to /home/user/bin/w32g and follow instruction below :

#!/usr/bin/python
  
  # You need to install dbus-scripts (BE CAREFUL, it's a devel package)
  # 
  # as root you need to create a file /etc/sudoers.d/w32g
  # with this line :
  #   user ALL = NOPASSWD: /bin/ping
  # and run the command update-sudoers because only root can use ping
  # 
  # always as root and you need to create another file
  # /etc/dbus-scripts/w32g with the following line : 
  #
  #   /home/user/bin/w32g * * com.nokia.icd status_changed * WLAN_INFRA *
  #
  # and copy this script in /home/user/bin/w32g
  
  import sys
  import os
  import ConfigParser
  import re
  import commands
  import time 
  
  debug = False
  
  conf_file = '/home/user/.w32g.conf'
  
  config = { 'message_on_idle': '3G cellular mode set',
    'message_on_connected': '2G (GSM) cellular mode set',
    'connection_test': 'sudo /bin/ping -c 1 www.google.com',
    'change_on_idle': 'true',
    'change_to_dual': 'true',
    'wait_on_call': 10,
    'wifi': ''
  }
  
  config_parser = ConfigParser.SafeConfigParser()
  
  try:
      config_parser.read(conf_file)
      for item in config_parser.items('w32g'):
          config[ item[0] ] = item[1]
  except ConfigParser.NoSectionError:
      pass
  
  def to_bool(string):
      if re.search('true', string, re.IGNORECASE):
          return True
  
  config['change_on_idle'] = to_bool(config['change_on_idle'])
  config['change_to_dual'] = to_bool(config['change_to_dual'])
  config['wait_on_call']   = int(config['wait_on_call'])
  
  wifi_id,state = sys.argv[5],sys.argv[7]
  
  # if we are not on the good wifi network we do nothing and exit
  if config['wifi'] and not re.search(wifi_id, config['wifi'], re.IGNORECASE):
      if debug: print "not the good wifi network, exit"
      sys.exit(0)
  
  dbus_wifi = "dbus-send --system --type=method_call --print-reply --dest=com.nokia.phone.net /com/nokia/phone/net Phone.Net.set_selected_radio_access_technology";
  
  dbus_notif = "dbus-send --system --type=method_call --print-reply --dest=org.freedesktop.Notifications /org/freedesktop/Notifications org.freedesktop.Notifications.SystemNoteInfoprint";
  
  dbus_test_call = "dbus-send --system --dest=com.nokia.csd.Call --print-reply=literal /com/nokia/csd/call/1 com.nokia.csd.Call.Instance.GetStatus"
  
  def is_on_call():
      output = commands.getoutput(dbus_test_call)
      if (re.match(".*uint32 0", output)):
          return True
      return False
  
  def wait_or_exit_on_call():
      if debug: print "in wait or exit on call"
      choice = config['wait_on_call']
      if choice > 0:
          end = time.time() + choice
          while (end > time.time()):
              if is_on_call(): return
              if (debug): print "wait"
              time.sleep(1)
          sys.exit()
      else:
          sys.exit()
          
  if state == 'CONNECTED':
      if (debug): print "CONNECTED STATE"
      # we verified that the connection works
      if config['connection_test']:
          ret = os.system(config['connection_test']);
      else:
          ret = 0
  
      # we wait or exit if there's a call
      wait_or_exit_on_call()
  
      if ret == 0:
          os.system(dbus_wifi + " byte:1");
          os.system(dbus_notif + " string:'" + config['message_on_connected'] + "'")
  
  elif state == 'IDLE' and config['change_on_idle']:
      if (debug): print "IDLE STATE"
      dual = "2"
      if config['change_to_dual']: dual = "0"
      print dual
  
      # we wait or exit if there's a call
      wait_or_exit_on_call()
  
      os.system(dbus_wifi + " byte:" + dual);
      os.system(dbus_notif + " string:'" + config['message_on_idle'] + "'")
  
  print state
  
  if debug: print "end here"

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Editing User:Nbc/W32g

@@ Line 114: / Line 114: @@
    def is_on_call():
        output = commands.getoutput(dbus_test_call)
-       return "uint32 0" in output
+       if (re.match(".*uint32 0", output)):
+          return True
+      return False
    def wait_or_exit_on_call():
@@ Line 121: / Line 123: @@
        if choice > 0:
            end = time.time() + choice
-           while end > time.time():
+           while (end > time.time()):
                if is_on_call(): return
-               if debug: print "wait"
+               if (debug): print "wait"
                time.sleep(1)
            sys.exit()
@@ Line 130: / Line 132: @@
    if state == 'CONNECTED':
-       if debug: print "CONNECTED STATE"
+       if (debug): print "CONNECTED STATE"
        # we verified that the connection works
        if config['connection_test']:
@@ Line 145: / Line 147: @@
    elif state == 'IDLE' and config['change_on_idle']:
-       if debug: print "IDLE STATE"
+       if (debug): print "IDLE STATE"
        dual = "2"
        if config['change_to_dual']: dual = "0"