Hi ,
We are using a 32 bit machine and dissector is working fine. The same
dissector when used in a 64 bit m/c is giving problems. I would like to
know how is it going to get affected in the change of environment,
because initially it did not even compile properly .While testing in a
64 bit machine the wireshark is getting crashed giving the following
error:
Inside unpack digits , length = 29 and offset is = 18
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 182924546464 (LWP 1776)]
0x0000002a9b46afb7 in unpack_digits (tvb=0x10dfbd8, offset=18,
dgt=0x2a9b588e78) at packet-xxx.c:4488
4488 digit_str[i] = dgt->out[octet & 0x0f];
(gdb)
The code for unpack digits is as follows:
static char*
unpack_digits(tvbuff_t *tvb, int offset, dgt_set_t *dgt){
int length, length_fake, offset_fake, counter=0;
guint8 octet, num_of_digits_imsi;
int i=0;
char *digit_str;
length = tvb_length(tvb);
printf("\n\nInside unpack digits , length = %d and offset is =
%d\n\n",length,offset);
if (length < offset)
return "";
digit_str = ep_alloc((length - offset)*2+1);
offset_fake = offset-1;
num_of_digits_imsi = tvb_get_guint8(tvb,offset_fake);
if( (num_of_digits_imsi % 2) == 0 )
length_fake = num_of_digits_imsi / 2;
else
length_fake = (num_of_digits_imsi+1)/2;
printf("\noffset_fake = %d\tnum_of_digits_imsi = %d\tlength_fake
= %d",offset_fake,num_of_digits_imsi,length_fake);
while ( counter < length_fake ){
octet = tvb_get_guint8(tvb,offset);
digit_str[i] = dgt->out[octet & 0x0f];
i++;
/* unpack second value in byte */
octet = octet >> 4;
if (octet == 0x0f) /* odd number bytes - hit filler
*/
break;
digit_str[i] = dgt->out[octet & 0x0f];
i++;
offset++;
counter++;
}
digit_str[i]= '\0';
return digit_str;
}
Can anybody please help???
Regards,
Tarani
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