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

 * posix/getaddrinfo.c: interruptible DNS resolution for POSIX

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

 * Copyright (C) 2016 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 <assert.h>

#include <stdio.h>

#include <netdb.h>

#include <vlc_common.h>

#include <vlc_interrupt.h>

#include <vlc_network.h>

struct vlc_gai_req

{

    const char *name;

    const char *service;

    const struct addrinfo *hints;

    struct addrinfo **result;

    int error;

    vlc_sem_t done;

};

static void *vlc_gai_thread(void *data)

{

    vlc_thread_set_name("vlc-getaddrinfo");

    struct vlc_gai_req *req = data;

    req->error = EAI_SYSTEM;

    req->error = getaddrinfo(req->name, req->service, req->hints, req->result);

    vlc_sem_post(&req->done);

    return NULL;

}

int vlc_getaddrinfo_i11e(const char *name, unsigned port,

                         const struct addrinfo *hints,

                         struct addrinfo **res)

{

    struct vlc_gai_req req =

    {

        .name = name,

        .service = NULL,

        .hints = hints,

        .result = res,

    };

    char portbuf[6];

    vlc_thread_t th;

    if (port != 0)

    {

        if ((size_t)snprintf(portbuf, sizeof (portbuf), "%u",

                             port) >= sizeof (portbuf))

            return EAI_NONAME;

        req.service = portbuf;

    }

    vlc_sem_init(&req.done, 0);

    if (vlc_clone(&th, vlc_gai_thread, &req))

        return EAI_SYSTEM;

    vlc_sem_wait_i11e(&req.done);

    vlc_cancel(th);

    vlc_join(th, NULL);

    return req.error;

}