/*****************************************************************************

 * getaddrinfo.c: getaddrinfo/getnameinfo replacement functions

 *****************************************************************************

 * Copyright (C) 2005 VLC authors and VideoLAN

 * Copyright (C) 2002-2007 Rémi Denis-Courmont

 *

 * Author: Rémi Denis-Courmont

 *

 * This program 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.

 *

 * This program 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 this program; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.

 *****************************************************************************/

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <vlc_common.h>

#include <stddef.h> /* size_t */

#include <string.h> /* strlen(), memcpy(), memset(), strchr() */

#include <stdlib.h> /* malloc(), free(), strtoul() */

#include <errno.h>

#include <assert.h>

#include <sys/types.h>

#include <vlc_network.h>

int vlc_getnameinfo( const struct sockaddr *sa, int salen,

                     char *host, int hostlen, int *portnum, int flags )

{

    char psz_servbuf[6], *psz_serv;

    int i_servlen, i_val;

    flags |= NI_NUMERICSERV;

    if( portnum != NULL )

    {

        psz_serv = psz_servbuf;

        i_servlen = sizeof( psz_servbuf );

    }

    else

    {

        psz_serv = NULL;

        i_servlen = 0;

    }

    i_val = getnameinfo(sa, salen, host, hostlen, psz_serv, i_servlen, flags);

    if( portnum != NULL )

        *portnum = atoi( psz_serv );

    return i_val;

}

int vlc_getaddrinfo (const char *node, unsigned port,

                     const struct addrinfo *hints, struct addrinfo **res)

{

    char hostbuf[NI_MAXHOST], portbuf[6], *servname;

    /*

     * In VLC, we always use port number as integer rather than strings

     * for historical reasons (and portability).

     */

    if (port != 0)

    {

        if (port > 65535)

            return EAI_SERVICE;

        /* cannot overflow */

        snprintf (portbuf, sizeof (portbuf), "%u", port);

        servname = portbuf;

    }

    else

        servname = NULL;

    /*

     * VLC extensions :

     * - accept the empty string as unspecified host (i.e. NULL)

     * - ignore square brackets (for IPv6 numerals)

     */

    if (node != NULL)

    {

        if (node[0] == '[')

        {

            size_t len = strlen (node + 1);

            if ((len <= sizeof (hostbuf)) && (node[len] == ']'))

            {

                assert (len > 0);

                memcpy (hostbuf, node + 1, len - 1);

                hostbuf[len - 1] = '\0';

                node = hostbuf;

            }

        }

        if (node[0] == '\0')

            node = NULL;

    }

    return getaddrinfo (node, servname, hints, res);

}

#if defined (_WIN32) || defined (__OS2__) \

 || defined (__ANDROID__) || defined (__APPLE__)

#warning vlc_getaddrinfo_i11e() not implemented!

int vlc_getaddrinfo_i11e(const char *node, unsigned port,

                         const struct addrinfo *hints, struct addrinfo **res)

{

    return vlc_getaddrinfo(node, port, hints, res);

}

#endif