Class: Ucp::Util::UCP

Inherits:
Object
  • Object
show all
Defined in:
lib/ucp/util/ucp.rb

Class Method Summary collapse

Class Method Details

.add_char(value, char) ⇒ Object 



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# File 'lib/ucp/util/ucp.rb', line 37

def self.add_char(value,char)
  @gsmtable[char]=value
  @asciitable[value]=char
end

.add_extchar(value, char) ⇒ Object 



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# File 'lib/ucp/util/ucp.rb', line 44

def self.add_extchar(value,char)
  @extensiontable[char]=value
  @extensiontable_rev[value]=char
end

.ascii2ira(str, max_bytes = nil) ⇒ Object

convert standard string to IRA encoded hexstring



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# File 'lib/ucp/util/ucp.rb', line 197

def self.ascii2ira(str,max_bytes=nil)

  tainted=false  # true if not able to convert a character
  s=""
  idx=0
  str.each_char  { |c|
    gsmchar=@gsmtable[c]

    ext=""
    if gsmchar.nil?
      if @extensiontable.has_key?(c)
        ext="1B"
        gsmchar=@extensiontable[c]
      else
        gsmchar=@gsmtable[" "]
        tainted=true
      end
    end


    tmp=int2hex(gsmchar)


    if !max_bytes.nil?
      # if adding this character exceeds the max allowed nr of bytes, break
      if ((tmp+ext+s).length*7.0/16).ceil>max_bytes
        break
      end
    end

    s+=ext+tmp
    idx+=(ext+tmp).length/2

    # if reached the max allowed nr of bytes, break
    #    if (s.length*7.0/16).floor==max_bytes
    #      break
    #    end

  }

  required_septets=s.length/2
  #puts "idx: #{idx}; req_sep: #{required_septets}"
  return GsmPackedMsg.new(s,UCP.utf8_substr(str,0,idx-1),idx,required_septets,tainted)
end

.decode7bitgsm(str) ⇒ Object

decode a 7bit packed GSM default alphabet hexstring



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# File 'lib/ucp/util/ucp.rb', line 439

def self.decode7bitgsm(str)        
  unencoded=""
  #puts "#{str}"
  bstr=UCP.hextobin_reversed(str)
  #puts "#{bstr}"
  # 110 1111 110 1100 110 0001
  # 1000011 1011101 0110111   000

  i=bstr.length-7
  while i>=0
    value=bstr[i,7].to_i(2)
    if value==0x1B
      i-=7
      value=@extensiontable_rev[bstr[i,7].to_i(2)]
      value=" " if value.nil?
      unencoded+=value
    else
      val=@asciitable[value]
      #puts "value: #{value} ; val: #{val}"
      val=" " if val.nil?
      unencoded+=val
      #unencoded+=value.chr
    end


    

    i-=7
  end


  #    i=0
  #    while i<str.length
  #      hexv=str[i,2]
  #      if "1B".eql?(hexv)
  #        i+=2
  #        hexv=str[i,2]
  #      end
  #
  #      unencoded+=hexv.to_i(16).chr
  #
  #      i+=2
  #    end


  return unencoded
end

.decode_ira(str) ⇒ Object

decode an IRA5 hexadecimal represented string to string



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# File 'lib/ucp/util/ucp.rb', line 489

def self.decode_ira(str)
  unencoded=""

  i=0
  while i<str.length
    hexv=str[i,2]
    if "1B".eql?(hexv)
      i+=2
      hexv=str[i,2]

      value=@extensiontable_rev[hexv.to_i(16)]
      value=" " if value.nil?
      unencoded+=value
    else
      val=@asciitable[hexv.to_i(16)]
      val=" " if val.nil?
      unencoded+=val
    end

    i+=2
  end

  return unencoded
end

.decode_ucp_msg(ucp) ⇒ Object

given an UCP pdu object, decode message field



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# File 'lib/ucp/util/ucp.rb', line 722

def self.decode_ucp_msg(ucp)
  text=nil
  dcs=ucp.dcs.to_i(16)

  if (dcs & 0x0F == 0x01) || (dcs & 0x0F == 0x00)

    if ucp.operation.eql?("30")
      text=UCP.decode_ira(ucp.get_field(:amsg))
    else

      if ucp.operation.eql?("51") || ucp.operation.eql?("52") || ucp.operation.eql?("53")
        mt=ucp.get_field(:mt)
        if mt.eql?("2")
          # numeric message.. return it as it is
          text=ucp.get_field(:msg)
        elsif mt.eql?("3")
          text=UCP.decode_ira(ucp.get_field(:msg))
        else
          # unexpected "mt" value. return nil explicitely
          return nil
        end
      elsif ucp.operation.eql?("01")
        text=UCP.decode_ira(ucp.get_field(:msg))
      else
        # unexpected operation. return nil explicitely
        return nil
      end

    end
  elsif (dcs & 0x0F == 0x08) || (dcs & 0x0F == 0x09)
    str=UCP.hex2str(ucp.get_field(:msg))
    text=Iconv.iconv("utf-8","utf-16be",str).first
  else
    # cant decode text; unsupported DCS
    return nil
  end

  return text
end

.decode_ucp_oadc(ucp) ⇒ Object

given an UCP pdu object, decode the originator address



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# File 'lib/ucp/util/ucp.rb', line 763

def self.decode_ucp_oadc(ucp)
  otoa=nil
  oadc=ucp.get_field(:oadc)

  if ucp.is_a?(Ucp51Operation) || ucp.is_a?(Ucp52Operation) || ucp.is_a?(Ucp53Operation) || ucp.is_a?(Ucp54Operation) || ucp.is_a?(Ucp55Operation) || ucp.is_a?(Ucp56Operation) || ucp.is_a?(Ucp57Operation) || ucp.is_a?(Ucp58Operation)
    otoa=ucp.get_field(:otoa)
  end

  if otoa.nil? || otoa.eql?("1139")
    return oadc
  elsif otoa.eql?("5039")
    #useful_nibbles=oadc[0,2].to_i(16)
    return UCP.decode7bitgsm(oadc[2..-1])
  else
    #
  end

  # by default, return oadc
  return oadc
end

.hex2str(hexstr) ⇒ Object

convert hexadecimal represent string to string, assuming a byte per character



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# File 'lib/ucp/util/ucp.rb', line 715

def self.hex2str(hexstr)
  str=""
  hexstr.scan(/../).each { | tuple | str+=tuple.hex.chr }
  return str
end

.hextobin(hstr) ⇒ Object

convert an hexadecimal string to a binary string



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# File 'lib/ucp/util/ucp.rb', line 403

def self.hextobin(hstr)
  bstr=""
  i=0
  while i<hstr.length
    tmp=hstr[i,2].to_i(16).to_s(2)

    nfillbits=8-tmp.length
    if nfillbits!=0
      tmp="0"*nfillbits+tmp
    end

    bstr+=tmp
    i+=2
  end
  return bstr
end

.hextobin_reversed(hstr) ⇒ Object 



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# File 'lib/ucp/util/ucp.rb', line 421

def self.hextobin_reversed(hstr)
  bstr=""
  i=0
  while i<hstr.length
    tmp=hstr[i,2].to_i(16).to_s(2)

    nfillbits=8-tmp.length
    if nfillbits!=0
      tmp="0"*nfillbits+tmp
    end

    bstr=tmp+bstr
    i+=2
  end
  return bstr
end

.initialize_ascii2ira ⇒ Object

build/initialize the GSM default alphabet mapping tables



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# File 'lib/ucp/util/ucp.rb', line 50

def self.initialize_ascii2ira
  
  ('A'..'Z').each { |c|
    add_char(c[0],c)
  }
  ('a'..'z').each { |c|
    #@gsmtable[c]=c[0]
    #@asciitable[c[0]]=c
    add_char(c[0],c)
  }
  ('0'..'9').each { |c|
    add_char(c[0],c)
  }


  add_char(0x00,"@")
  add_char(0x01,"£")
  add_char(0x02,"$")
  add_char(0x03,"¥")
  add_char(0x04,"è")
  add_char(0x05,"é")
  add_char(0x06,"ù")
  add_char(0x07,"ì")
  add_char(0x08,"ò")
  add_char(0x09,"Ç")
  add_char(0x0A,"\n")
  add_char(0x0B,"Ø")
  add_char(0x0C,"ø")
  add_char(0x0D,"\r")
  add_char(0x0E,"Å")
  add_char(0x0F,"å")

  add_char(0x10, "Δ")
  add_char(0x11, "_")
  add_char(0x12, "Φ")
  add_char(0x13, "Γ")
  add_char(0x14, "Λ")
  add_char(0x15, "Ω")
  add_char(0x16, "Π")
  add_char(0x17, "Ψ")
  add_char(0x18, "Σ")
  add_char(0x19, "Θ")
  add_char(0x1A, "Ξ")
  # 0x1B is escape sequence for extended characters
  add_char(0x1C, "Æ")
  add_char(0x1D, "æ")
  add_char(0x1E, "ß")
  add_char(0x1F,"É")



  add_char(0x20," ")
  add_char(0x21,"!")
  add_char(0x22,'"')
  add_char(0x23,"#")
  add_char(0x24,"¤")
  add_char(0x25,"%")
  add_char(0x26,"&")
  add_char(0x27,"'")
  add_char(0x28,"(")
  add_char(0x29,")")
  add_char(0x2A,"*")
  add_char(0x2B,"+")
  add_char(0x2C,",")
  add_char(0x2D,"-")
  add_char(0x2E,".")
  add_char(0x2F,"/")

  add_char(0x3A,":")
  add_char(0x3B,";")
  add_char(0x3C,"<")
  add_char(0x3D,"=")
  add_char(0x3E,">")
  add_char(0x3F,"?")

  add_extchar(0x65,"€")
  add_extchar(0x14,"^")
  add_extchar(0x28,"{")
  add_extchar(0x29,"}")
  add_extchar(0x2F,"\\")
  add_extchar(0x3C,"[")
  add_extchar(0x3D,"~")
  add_extchar(0x3E,"]")
  add_extchar(0x40,"|")
end

.int2hex(i, max_nibbles = 2) ⇒ Object

convert an integer to an hex string, two (or given) nibbles wide



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# File 'lib/ucp/util/ucp.rb', line 518

def self.int2hex(i,max_nibbles=2)
  tmp=i.to_s(16).upcase
  if tmp.length%2!=0
    tmp="0"+tmp
  end

  remaining_nibbles=max_nibbles-tmp.length
  if remaining_nibbles>0
    tmp="0"*remaining_nibbles+tmp;
  end

  return tmp
end

.make_multi_ucps(originator, recipient, message, mr = 0) ⇒ Object

automatically build the necessary UCP pdu’s in order to encode a given submit message returns an array of UCP51 pdu’s (for now, it does NOT select automatically the SM encoding; it forces/assumes 7bit GSM)



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# File 'lib/ucp/util/ucp.rb', line 343

def self.make_multi_ucps(originator,recipient,message,mr=0)
  ucps=[]

  gsm7bit_encodable=false

  if gsm7bit_encodable
    gsmparts= UCP.multi_ascii2ira(message,134)
  else
    gsmparts= UCP.multi_ucs2(message,134)
  end


  part_nr=1
  gsmparts.each { |gsmpart|
    ucp=Ucp51Operation.new
    ucp.basic_submit(originator,recipient,nil)

    if gsmparts.length>1
      # concatenated xser
      ucp.add_xser("01","050003"+UCP.int2hex(mr)+UCP.int2hex(gsmparts.length)+UCP.int2hex(part_nr))
    end

    if gsm7bit_encodable
      ucp.set_fields({:mt=>3, :msg=>gsmpart.encoded})
      # DCS xser
      ucp.add_xser("02","01")
    else
      ucp.set_fields({:msg=>gsmpart.encoded,:mt=>4,:nb=>gsmpart.encoded.length*4})
      # DCS xser
      ucp.add_xser("02","08")
    end

    #ucp.trn=UCP.int2hex(initial_trn)
    #initial_trn+=1

    #puts "part: #{ucp.to_s}"
    ucps<<ucp
    part_nr+=1
  }
  return ucps
end

.make_ucp_result(ucp) ⇒ Object

given an UCP pdu object, build a corresponding result pdu



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# File 'lib/ucp/util/ucp.rb', line 667

def self.make_ucp_result(ucp)
  #puts "make_ucp_result(#{ucp.to_s})"

  if ucp.nil?
    return nil
  end

  trn=ucp.trn
  operation_type=ucp.operation_type
  operation=ucp.operation

  ucpmsg=nil

  if operation.eql?("01")
    ucpmsg=Ucp01Result.new
  elsif operation.eql?("30")
    ucpmsg=Ucp30Result.new
  elsif operation.eql?("31")
    ucpmsg=Ucp31Result.new
  elsif operation.eql?("51")
    ucpmsg=Ucp51Result.new
  elsif operation.eql?("52")
    ucpmsg=Ucp52Result.new
  elsif operation.eql?("53")
    ucpmsg=Ucp53Result.new
  elsif operation.eql?("54")
    ucpmsg=Ucp54Result.new
  elsif operation.eql?("55")
    ucpmsg=Ucp55Result.new
  elsif operation.eql?("56")
    ucpmsg=Ucp56Result.new
  elsif operation.eql?("57")
    ucpmsg=Ucp57Result.new
  elsif operation.eql?("58")
    ucpmsg=Ucp58Result.new
  elsif operation.eql?("60")
    ucpmsg=Ucp60Result.new
  elsif operation.eql?("61")
    ucpmsg=Ucp61Result.new
  else
    return nil
  end

  ucpmsg.trn=trn
  return ucpmsg
end

.multi_ascii2ira(str, max_bytes) ⇒ Object

given a text, automatically split it if necessary and encode each part text in (IRA5) GSM default alphabet returns an array of IRA5 hexadecimal strings, one per part



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# File 'lib/ucp/util/ucp.rb', line 257

def self.multi_ascii2ira(str,max_bytes)
  msgparts=[]
  idx=0

  if str.jlength<=160
    packedmsg=UCP.ascii2ira(UCP.utf8_substr(str,idx),140)
    #puts "pckd_chars: #{packedmsg.chars}; strlen: #{str.jlength}"
    if packedmsg.chars==str.jlength
      msgparts<<packedmsg
      return msgparts
    end
  end

  while true
    #packedmsg=UCP.ascii2ira(str[idx..-1],max_bytes)
    #puts "bla: #{UCP.utf8_substr(str,idx)}"
    packedmsg=UCP.ascii2ira(UCP.utf8_substr(str,idx),max_bytes)
    msgparts<<packedmsg
    #break
    #puts "idx: #{idx}; pckd_chars: #{packedmsg.chars}; strlen: #{str.jlength}"
    
    #puts "sL: #{UCP.utf8_substr(str,idx,idx+packedmsg.chars- 1)} ; #{str[0,idx+packedmsg.chars].length}#"

    #if idx+packedmsg.chars<str.length
    if idx+packedmsg.chars<str.jlength
      idx+=packedmsg.chars
    else
      break
    end
  end
  return msgparts
end

.multi_ucs2(str, max_bytes) ⇒ Object

given a text, automatically split it if necessary and encode each part text in UCS-2 returns an array of UCS-2 hexadecimal strings, one per part



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# File 'lib/ucp/util/ucp.rb', line 309

def self.multi_ucs2(str,max_bytes)
  msgparts=[]
  idx=0

  if str.jlength<=70
    packedmsg=UCP.str2ucs2(str,140)
    #puts "pckd_chars: #{packedmsg.chars}; strlen: #{str.jlength}"
    if packedmsg.chars==str.jlength
      msgparts<<packedmsg
      return msgparts
    end
  end

  while true

    #puts "bla: #{UCP.utf8_substr(str,idx)}"
    packedmsg=UCP.str2ucs2(UCP.utf8_substr(str,idx),max_bytes)
    msgparts<<packedmsg
    #break
    #puts "idx: #{idx}; pckd_chars: #{packedmsg.chars}; strlen: #{str.jlength}"
    #puts "sL: #{UCP.utf8_substr(str,idx,idx+packedmsg.chars- 1)} ; #{str[0,idx+packedmsg.chars].length}#"

    if idx+packedmsg.chars<str.jlength
      idx+=packedmsg.chars
    else
      break
    end
  end
  return msgparts
end

.pack7bits(str) ⇒ Object

pack a given text string in 7bit GSM default alphabet return it as an hexadecimal string



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# File 'lib/ucp/util/ucp.rb', line 138

def self.pack7bits(str)
  
  s=""
  str.each_char  { |c|

    ext=""
    gsmchar=@gsmtable[c]

    if gsmchar.nil?
      if @extensiontable.has_key?(c)
        ext="0011011" # 1B
        gsmchar=@extensiontable[c]
      else
        gsmchar=@gsmtable[" "]
      end
    end

    #gsmchar=c[0]
    #puts "#{c} : #{gsmchar} xxx"
    #gsmchar=@gsmtable[" "] if gsmchar.nil?
    
    tmp= gsmchar.to_s(2)

    remainder=tmp.length%7
    if remainder!=0
      nfillbits=7-remainder
      tmp="0"*nfillbits+tmp
    end
    
    s=tmp+ext+s

  }

  remainder=s.length%8
  if remainder!=0
    nfillbits=8-remainder
    s="0"*nfillbits+s
  end

  #puts "S: #{s}"
  
  i=s.length-8
  hexstr=""
  while i>=0
    c=s[i,8]

    tmp=c.to_i(2).to_s(16).upcase
    if tmp.length==1
      tmp="0"+tmp
    end
    #      puts tmp
    hexstr+=tmp
    i-=8
  end

  return hexstr
end

.packoadc(oa) ⇒ Object

return an encoded originator alphanumeric address to be used in the “oadc” field, if alphanumeric



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# File 'lib/ucp/util/ucp.rb', line 387

def self.packoadc(oa)
  packedoa=UCP.pack7bits(oa)

  # esta conta nao esta correcta... por causa das extensoes...
  #useful_nibbles=packedoa.length
  useful_nibbles=(oa.length*7.0/4).ceil

  tmp=useful_nibbles.to_s(16).upcase
  if tmp.length==1
    tmp="0"+tmp
  end

  return tmp+packedoa
end

.parse_str(ustr) ⇒ Object

given a UCP pdu string, return a UCP pdu object



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# File 'lib/ucp/util/ucp.rb', line 535

def self.parse_str(ustr)
  #puts "parse_str(#{ustr})"

  if ustr.nil?
    return nil
  end

  arr=ustr[(ustr.index(2.chr)+1)..-2].split("/")
  trn=arr[0]
  #puts "#{trn}"
  # length
  operation_type=arr[2]
  #puts "#{operation_type}"
  operation=arr[3]
  #puts "#{operation}"

  ucpmsg=nil

  if operation.eql?("01")
    if operation_type.eql?("O")
      # puts "parsing a ucp01"
      ucpmsg=Ucp01Operation.new(arr)
    elsif operation_type.eql?("R")
      # puts "parsing a result of a  ucp01"
      ucpmsg=Ucp01Result.new(arr)        
    end
  elsif operation.eql?("30")
    if operation_type.eql?("O")
      # puts "parsing a ucp30"
      ucpmsg=Ucp30Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp30"
      ucpmsg=Ucp30Result.new(arr)
    end
  elsif operation.eql?("31")
    if operation_type.eql?("O")
      #puts "parsing a ucp31"
      ucpmsg=Ucp31Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp31"
      ucpmsg=Ucp31Result.new(arr)
    end
  elsif operation.eql?("51")
    if operation_type.eql?("O")
      #puts "parsing a ucp51"
      ucpmsg=Ucp51Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp51"
      ucpmsg=Ucp51Result.new(arr)
    end
  elsif operation.eql?("52")
    if operation_type.eql?("O")
      #puts "parsing a ucp52"
      ucpmsg=Ucp52Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp52"
      ucpmsg=Ucp52Result.new(arr)
    end
  elsif operation.eql?("53")
    if operation_type.eql?("O")
      #puts "parsing a ucp53"
      ucpmsg=Ucp53Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp53"
      ucpmsg=Ucp53Result.new(arr)
    end
  elsif operation.eql?("54")
    if operation_type.eql?("O")
      #puts "parsing a ucp54"
      ucpmsg=Ucp54Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp54"
      ucpmsg=Ucp54Result.new(arr)
    end
  elsif operation.eql?("55")
    if operation_type.eql?("O")
      #puts "parsing a ucp55"
      ucpmsg=Ucp55Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp55"
      ucpmsg=Ucp55Result.new(arr)
    end
  elsif operation.eql?("56")
    if operation_type.eql?("O")
      #puts "parsing a ucp56"
      ucpmsg=Ucp56Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp56"
      ucpmsg=Ucp56Result.new(arr)
    end
  elsif operation.eql?("57")
    if operation_type.eql?("O")
      #puts "parsing a ucp57"
      ucpmsg=Ucp57Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp57"
      ucpmsg=Ucp57Result.new(arr)
    end
  elsif operation.eql?("58")
    if operation_type.eql?("O")
      #puts "parsing a ucp58"
      ucpmsg=Ucp58Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp58"
      ucpmsg=Ucp58Result.new(arr)
    end
  elsif operation.eql?("60")
    if operation_type.eql?("O")
      #puts "parsing a ucp60"
      ucpmsg=Ucp60Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp60"
      ucpmsg=Ucp60Result.new(arr)
    end
  elsif operation.eql?("61")
    if operation_type.eql?("O")
      #puts "parsing a ucp61"
      ucpmsg=Ucp61Operation.new(arr)
    elsif operation_type.eql?("R")
      #puts "parsing a result of a  ucp61"
      ucpmsg=Ucp61Result.new(arr)
    end
  end

  #ucpmsg.trn=trn
  return ucpmsg
end

.str2ucs2(str, max_bytes = nil) ⇒ Object

convert a given UTF-8 string to “UCS-2” returns an object representing the UCS-2 packed message



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# File 'lib/ucp/util/ucp.rb', line 292

def self.str2ucs2(str,max_bytes=nil)
  hexstr=""
  str=Iconv.iconv("utf-16be", "utf-8", str).first
  i=0
  str.each_byte{ |c|
    hexstr+=UCP.int2hex(c)
    i+=1
    if (!max_bytes.nil?) && (i == max_bytes)
      break
    end
  }

  return Ucs2PackedMsg.new(hexstr,UCP.utf8_substr(str,0,i-1),i/2,i)
end

.utf8_substr(str, idxs, idxe = nil) ⇒ Object

a dirty UTF-8 substring implementation returns a substring of an UTF-8 encoded string, given the string, start end end characters



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# File 'lib/ucp/util/ucp.rb', line 244

def self.utf8_substr(str,idxs,idxe=nil)
  s=""
  i=0
  idxe=str.jlength-1 if idxe.nil?
  str.each_char{ |c|
    s+=c if i>=idxs and i<=idxe
    i+=1
  }
  return s
end