Extract sequences of bytes from binary for differents blocks Post: 302846535

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Top Forums Shell Programming and Scripting Extract sequences of bytes from binary for differents blocks Post 302846535 by Ophiuchus on Saturday 24th of August 2013 12:54:53 PM

08-24-2013

Registered User

Hello ahamed!

I'm trying to avoid printing the "f's" that are printing for the fields
in red below, but for now is secondary that issue:

Code:

void print_data(const unsigned char *ptr, int len, block bl)
{
        int i;
        if(MAIN_BLOCK == bl){
                print_bytes(ptr, 1);
                print_bytes(ptr+1, 3);
                print_bytes(ptr+4, 8);
                print_bytes(ptr+12, 8);
        } else {
                print_bytes(ptr, 1);
                print_bytes(ptr+1, 1);
                print_bytes(ptr+2, 1);
                print_bytes(ptr+3, 1);
                print_bytes(ptr+4, 4);
                print_bytes(ptr+8, 8);
                print_bytes(ptr+16, 1);
                if(*ptr == intrim_pat1[2][1]){
                        print_bytes(ptr+17, 1);
                }
        }
        return;
}

If you want, better please help me in extract the last sequences of interest to me and is at the end of the sub-block and begins with 84 0e, where 0e is the length, so is needed to extract the 84 and the next 14 bytes after 0e, separating each byte by "|". As is part of the same block, print as before in the same line.

I'm attaching and image showing in red the bytes I mention.

I've added 0x03, 0x84 at the end of the intrim_pat1, and it seems is pending add some other code.

Code:

static unsigned char intrim_pat1[][2] = { {0x03, 0x80}, {0x03, 0x81}, {0x03, 0x83}, {0x03, 0x86}, {0x03, 0x87},{0x03,0x84} };

PD: 84 0E will appear at the end of sub-block, won't appear after 0x03, but I've added in intrim_pat1 because is the way I see possible to do it for me.

Thanks in advance.

Extract sequences of bytes from binary for differents blocks-image2jpg

Ophiuchus

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LEARN ABOUT NETBSD

atomic_inc_64

ATOMIC_INC(3)						   BSD Library Functions Manual 					     ATOMIC_INC(3)

NAME

     atomic_inc, atomic_inc_32, atomic_inc_uint, atomic_inc_ulong, atomic_inc_ptr, atomic_inc_64, atomic_inc_32_nv, atomic_inc_uint_nv,
     atomic_inc_ulong_nv, atomic_inc_ptr_nv, atomic_inc_64_nv -- atomic increment operations

SYNOPSIS

     #include <sys/atomic.h>

     void
     atomic_inc_32(volatile uint32_t *ptr);

     void
     atomic_inc_uint(volatile unsigned int *ptr);

     void
     atomic_inc_ulong(volatile unsigned long *ptr);

     void
     atomic_inc_ptr(volatile void *ptr);

     void
     atomic_inc_64(volatile uint64_t *ptr);

     uint32_t
     atomic_inc_32_nv(volatile uint32_t *ptr);

     unsigned int
     atomic_inc_uint_nv(volatile unsigned int *ptr);

     unsigned long
     atomic_inc_ulong_nv(volatile unsigned long *ptr);

     void *
     atomic_inc_ptr_nv(volatile void *ptr);

     uint64_t
     atomic_inc_64_nv(volatile uint64_t *ptr);

DESCRIPTION

     The atomic_inc family of functions increment (by one) the variable referenced by ptr in an atomic fashion.

     The *_nv() variants of these functions return the new value.

     The 64-bit variants of these functions are available only on platforms that can support atomic 64-bit memory access.  Applications can check
     for the availability of 64-bit atomic memory operations by testing if the pre-processor macro __HAVE_ATOMIC64_OPS is defined.

SEE ALSO

     atomic_ops(3)

HISTORY

     The atomic_inc functions first appeared in NetBSD 5.0.

BSD
								  April 11, 2007							       BSD

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