/* Convert an IPv6 scope ID from text to the internal representation.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <net-internal.h>

#include <ctype.h>

#include <errno.h>

#include <locale.h>

#include <net/if.h>

#include <stdbool.h>

#include <stdint.h>

#include <stdlib.h>

/* Parse SOURCE as a scope ID for ADDRESS.  Return 0 on success and -1

   on error.  */

int

__inet6_scopeid_pton (const struct in6_addr *address, const char *scope,

                      uint32_t *result)

{

  if (IN6_IS_ADDR_LINKLOCAL (address)

      || IN6_IS_ADDR_MC_NODELOCAL (address)

      || IN6_IS_ADDR_MC_LINKLOCAL (address))

    {

      uint32_t number = __if_nametoindex (scope);

      if (number != 0)

        {

          *result = number;

          return 0;

        }

    }

  if (isdigit_l (scope[0], _nl_C_locobj_ptr))

    {

      char *end;

      unsigned long long number

        = ____strtoull_l_internal (scope, &end, /*base */ 10, /* group */ 0,

                                   _nl_C_locobj_ptr);

      if (*end == '\0' && number <= UINT32_MAX)

        {

          *result = number;

          return 0;

        }

    }

  __set_errno (EINVAL);

  return -1;

}

libc_hidden_def (__inet6_scopeid_pton)