bind.c

一款类linux的操作系统源码

/*
 *  Roadrunner/pk
 *    Copyright (C) 1989-2002  Cornfed Systems, Inc.
 *
 *  The Roadrunner/pk operating system is free software; you can
 *  redistribute and/or modify it under the terms of the GNU General
 *  Public License, version 2, as published by the Free Software
 *  Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT 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, write to the Free
 *  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA 02111-1307 USA
 *
 *  More information about the Roadrunner/pk operating system of
 *  which this file is a part is available on the World-Wide Web
 *  at: http://www.cornfed.com.
 *
 */

#include <errno.h>
#include <fs.h>
#include <net/ip.h>
#include <sys/socket.h>

int
bind(int s, const struct sockaddr *name, int namelen)
{
    socket_t socket;
    sockaddr_in_t sin;

    /* XXX Check for addresses already bound */

    if (s < 0 || s >= FILES)
	return EINVAL;

    if (filetab[s].type != FT_SOCKET)
	return ENOTSOCK;

    if (name->sa_family != AF_INET)
	return EINVAL;

    socket = (socket_t) filetab[s].data;
    if (socket->state != SS_INUSE)
	return EBADF;

    sin = (sockaddr_in_t) name;
    socket->state = SS_BOUND;
    socket->sport = sin->sin_port;
    socket->src = sin->sin_addr;

    return 0;
}