/*
 * libexplain - Explain errno values returned by libc functions
 * Copyright (C) 2008, 2009 Peter Miller
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <libexplain/ac/stdio.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/ac/sys/socket.h>

#include <libexplain/connect.h>
#include <libexplain/strtol.h>
#include <libexplain/wrap_and_print.h>

#include <explain/syscall/connect.h>


void
explain_syscall_connect(int errnum, int argc, char **argv)
{
    int             fildes;
    static const struct sockaddr_storage serv_addr_zero;
    struct sockaddr_storage serv_addr_dummy;
    struct sockaddr *serv_addr;
    int             serv_addr_size;

    serv_addr_dummy = serv_addr_zero;
    serv_addr = (struct sockaddr *)&serv_addr_dummy;
    serv_addr_size = sizeof(serv_addr_dummy);
    switch (argc)
    {
    case 3:
        serv_addr_size = explain_strtol_or_die(argv[2], 0, 0);
        if (serv_addr_size < (int)sizeof(serv_addr->sa_family))
            serv_addr_size = sizeof(serv_addr->sa_family);
        else if (serv_addr_size > (int)sizeof(serv_addr_dummy))
            serv_addr_size = sizeof(serv_addr_dummy);

        serv_addr = (struct sockaddr *)explain_strtol_or_die(argv[1], 0, 0);
        /* fall through... */

    case 1:
        fildes = explain_strtol_or_die(argv[0], 0, 0);
        break;

    default:
        fprintf(stderr, "connect: requires 3 arguments, not %d\n", argc);
        exit(EXIT_FAILURE);
    }

    explain_wrap_and_print
    (
        stdout,
        explain_errno_connect(errnum, fildes, serv_addr, serv_addr_size)
    );
}