1  /* Convert Inet number to ASCII representation.
       2     Copyright (C) 1997-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <stdio.h>
      20  #include <stdlib.h>
      21  #include <arpa/inet.h>
      22  
      23  /* The interface of this function is completely stupid, it requires a
      24     static buffer.  We relax this a bit in that we allow one buffer for
      25     each thread.  */
      26  static __thread char buffer[18];
      27  
      28  
      29  char *
      30  inet_ntoa (struct in_addr in)
      31  {
      32    unsigned char *bytes = (unsigned char *) &in;
      33    __snprintf (buffer, sizeof (buffer), "%d.%d.%d.%d",
      34  	      bytes[0], bytes[1], bytes[2], bytes[3]);
      35  
      36    return buffer;
      37  }