#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "dns.h"
#include "port_utils.h"
#include "utils.h"

// SUGGESTION: Use this file for any network-related functionality, such as
// sending or receiving messages.

void
ptr_ip (char *dst, size_t dst_size, const char *ip)
{
  char tmp[64];
  strncpy (tmp, ip, sizeof (tmp));
  tmp[sizeof (tmp) - 1] = '\0';

  char *octets[4];
  char *token = strtok (tmp, ".");
  int count = 0;
  while (token && count < 4)
    {
      octets[count++] = token;
      token = strtok (NULL, ".");
    }

  if (count != 4)
    {
      fprintf (stderr, "Invalid PTR IP");
      exit (EXIT_FAILURE);
    }

  snprintf (dst, dst_size, "%s.%s.%s.%s.in-addr.arpa.", octets[3], octets[2],
            octets[1], octets[0]);
}

void
print_byte_block (uint8_t *bytes, size_t length)
{
  printf ("  ");
  for (int i = 0; i < length; i++)
    {
      printf ("%02x", bytes[i]);
      if (i == length - 1)
        printf ("\n");
      else if ((i + 1) % 16 == 0)
        printf ("\n  ");
      else if ((i % 2) != 0)
        printf (" ");
    }
}