#!/usr/bin/python

import dbus
import sys

def octify(str):
    '''     
    Returns a list of octet bytes representing
    each char of the input str.               
    '''                                       

    bytes = map(ord, str)
    bitsconsumed = 0     
    referencebit = 7     
    octets = []          

    while len(bytes):
            byte = bytes.pop(0)
            byte = byte >> bitsconsumed
                                       
            try:
                    nextbyte = bytes[0]
                    bitstocopy = (nextbyte & (0xff >> referencebit)) << referencebit
                    octet = (byte | bitstocopy)

            except:
                    octet = (byte | 0x00)

            if bitsconsumed != 7:
                    octets.append(byte | bitstocopy)
                    bitsconsumed += 1
                    referencebit -= 1
            else:
                    bitsconsumed = 0
                    referencebit = 7

    return octets

def semi_octify(str):
    '''
    Expects a string containing two digits.
    Returns an octet -
    first nibble in the octect is the first
    digit and the second nibble represents
    the second digit.
    '''
    try:
            digit_1 = int(str[0])
            digit_2 = int(str[1])
            octet = (digit_2 << 4) | digit_1
    except:
            octet = (1 << 4) | digit_1

    return octet

def resetnumber(number):
        '''
        Adds trailing F to number if length is
        odd.
        '''
        length = len(number)
        if (length % 2) != 0:
            number = number + 'F'
        return number

def createPDUstring(number, msg):
    '''
    Returns a list of bytes to represent a valid PDU message
    '''
    octifiedmsg = octify(msg)
    number = resetnumber(number)
    octifiednumber = [ semi_octify(number[i:i+2]) for i in range(0, len(number), 2) ]
        
    HEADER = 1
    FIRSTOCTETOFSMSDELIVERMSG = 10
    ADDR_TYPE = 129 #unknown format
    number_length = len(number)
    msg_length = len(msg)
    pdu_message = [HEADER, FIRSTOCTETOFSMSDELIVERMSG, number_length, ADDR_TYPE]
    pdu_message.extend(octifiednumber)
    pdu_message.append(0)
    pdu_message.append(0)
    pdu_message.append(msg_length)
    pdu_message.extend(octifiedmsg)
    return pdu_message

class SMS(object):
    '''
    Sends sms messages 
    '''
    
    def __init__(self, msg, number):
        self.pdustring = createPDUstring(number, msg)
        
    def send(self):
        self.__dbus_send(self.pdustring)

    def __dbus_send(self, pdu_string):
        import dbus
        bus = dbus.SystemBus()
        smsobject = bus.get_object('com.nokia.phone.SMS', '/com/nokia/phone/SMS/ba212ae1')
        smsiface = dbus.Interface(smsobject, 'com.nokia.csd.SMS.Outgoing')
        arr = dbus.Array(pdu_string)
        msgdeliver = dbus.Array([arr]) 
        smsiface.Send(msgdeliver,'')
        
    def print_pdustring(self):
        print self.pdustring        

if __name__ == "__main__":
    if len(sys.argv) != 3:
        print "usage %s number message" % sys.argv[0]
    else:
        sms = SMS(sys.argv[2], sys.argv[1])
        sms.send()
        print "sending sms..."

Traceback (most recent call last):
  File "./send_sms.py", line 114, in <module>
    sms = SMS(sys.argv[2], sys.argv[1])
  File "./send_sms.py", line 93, in __init__
    self.pdustring = createPDUstring(number, msg)
  File "./send_sms.py", line 72, in createPDUstring
    octifiednumber = [ semi_octify(number[i:i+2]) for i in range(0,
  len(number), 2) ]
  File "./send_sms.py", line 52, in semi_octify
    octet = (1 << 4) | digit_1
UnboundLocalError: local variable 'digit_1' referenced before assignment