IP Packet dump and related utilities

IP packet dump

typedef std::basic_string<uint8_t> Packet; 

void hexdump(const Packet& pkt) 
{     
 unsigned j=0;     

 for(Packet::const_iterator i=pkt.begin(); i != pkt.end(); ++i)     
 {        
    printf("%02x ", *i);         
    ++j;         
    if(j==8)         
    {             
       printf("  ");         
    }         
    else if(j==16)         
    {             
       j=0;             
       printf("\n");         
    }     
 }     
 printf("\n"); 
} 

///////////////Alternate///////////////
void hexdump(buf, size)
{
    unsigned i; 
    unsigned j=0; 
    for (i=0; i< size; i++) { 
      printf("%02x ", data_pkt[i]); 
      j++; 
      if (j==8) printf(" "); 
      else if (j==16) { 
          j=0; 
          printf("\n"); 
      } 
   } 
   printf("\n");
}

Back trace dump

# include < execinfo.h >
backtrace_print (void)
{
void *trace[128];
int trace_size;
char **strings;
unsigned i;
trace_size = backtrace (trace, 128); 

 strings = backtrace_symbols (trace, trace_size); 

if (strings) 

{ 

/* Start from 1, we don't want it to print this function */ 

for (i = 1; i < trace_size; ++i)  {

    printf (" %s", strings[i]); 
 }
}