contrib/sendmail/libsm/inet6_ntop.c

   1 /*
   2  * Copyright (c) 2013 Proofpoint, Inc. and its suppliers.
   3  *      All rights reserved.
   4  *
   5  * By using this file, you agree to the terms and conditions set
   6  * forth in the LICENSE file which can be found at the top level of
   7  * the sendmail distribution.
   8  *
   9  */
  10
  11 #include <sm/gen.h>
  12 SM_RCSID("@(#)$Id: inet6_ntop.c,v 1.2 2013-11-22 20:51:43 ca Exp $")
  13
  14 #if NETINET6
  15 # include <sm/conf.h>
  16 # include <sm/types.h>
  17 # include <sm/io.h>
  18 # include <sm/string.h>
  19 # include <netinet/in.h>
  20
  21 /*
  22 **  SM_INET6_NTOP -- convert IPv6 address to ASCII string (uncompressed)
  23 **
  24 **      Parameters:
  25 **              ipv6 -- IPv6 address
  26 **              dst -- ASCII representation of address (output)
  27 **              len -- length of dst
  28 **
  29 **      Returns:
  30 **              error: NULL
  31 */
  32
  33 char *
  34 sm_inet6_ntop(ipv6, dst, len)
  35         const void *ipv6;
  36         char *dst;
  37         size_t len;
  38 {
  39         SM_UINT16 *u16;
  40         int r;
  41
  42         u16 = (SM_UINT16 *)ipv6;
  43         r = sm_snprintf(dst, len,
  44                 "%x:%x:%x:%x:%x:%x:%x:%x"
  45                         , htons(u16[0])
  46                         , htons(u16[1])
  47                         , htons(u16[2])
  48                         , htons(u16[3])
  49                         , htons(u16[4])
  50                         , htons(u16[5])
  51                         , htons(u16[6])
  52                         , htons(u16[7])
  53                 );
  54         if (r > 0)
  55                 return dst;
  56         return NULL;
  57 }
  58 #endif /* NETINET6 */