| 
 Hi, 
In 
addittion look at the funktion dissect_gsm_map_ISDN_AddressString() ip 
packet-gsm_map.c 
and 
 item = get_ber_last_created_item();  subtree = 
proto_item_add_subtree(item, 
ett_gsm_map_isdn_address_string); 
  
 proto_tree_add_item(subtree, hf_gsm_map_extension, parameter_tvb, 
0,1,FALSE);  proto_tree_add_item(subtree, hf_gsm_map_nature_of_number, 
parameter_tvb, 0,1,FALSE);  proto_tree_add_item(subtree, 
hf_gsm_map_number_plan, parameter_tvb, 0,1,FALSE); 
  
 digit_str = unpack_digits(parameter_tvb, 1); 
  
 proto_tree_add_string(subtree, hf_gsm_map_isdn_address_digits, 
parameter_tvb, 1, -1, digit_str);
  
  
BR 
Anders  
Hi, 
The value used to mach the value string 
value is the "masked out" value. 
  
So if the value is 0xc0f0 and the mask is 
0xc00 the value used to match the string would be 3. 
BR 
Anders  
 
  
Från: wireshark-dev-bounces@xxxxxxxxxxxxx genom 
taraniteja.vishwanatha@xxxxxxxxx Skickat: må 2006-12-18 
08:09 Till: anders.broman@DOMAIN.HIDDEN; stephentfisher@DOMAIN.HIDDEN; 
wireshark-dev@xxxxxxxxxxxxx Ämne: [Wireshark-dev] How to dissect bit 
information
  
Hi Anders/ Steve , 
  
This is with regards to the mail 
posted by vikash How to dissect bit information. 
As you have suggested we can get the 
desired bit/bits by masking the remaining bits.But the problem we are 
facing 
is there is a set of values 
assosiated with each bit / bits.In Wireshark, the value_string can take values 
pertaining to the whole octet 
and therefore we are not able to 
understand how to capture the values assosiated with bit/bits. 
I would really appreciate your help 
in this matter 
  
//Tarani 
   
  
  
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