/*      $OpenBSD: net.c,v 1.7 2021/01/30 14:37:01 deraadt Exp $ */
/*      $NetBSD: net.c,v 1.1 1997/04/16 20:29:18 thorpej Exp $  */

/*
 * Copyright (C) 1995 Wolfgang Solfrank.
 * Copyright (C) 1995 TooLs GmbH.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * This module implements a "raw device" interface suitable for
 * use by the stand-alone I/O library NFS code.  This interface
 * does not support any "block" access, and exists only for the
 * purpose of initializing the network interface, getting boot
 * parameters, and performing the NFS mount.
 *
 * At open time, this does:
 *
 * find interface       - netif_open()
 * BOOTP                - bootp()
 * RPC/mountd           - nfs_mount()
 *
 * The root file handle from mountd is saved in a global
 * for use by the NFS open code (NFS/lookup).
 *
 * Note: this is based in part on sys/arch/sparc/stand/net.c
 */

#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <lib/libsa/stand.h>
#include <lib/libsa/net.h>
#include <lib/libsa/netif.h>
#include <lib/libsa/bootp.h>
#include <lib/libsa/nfs.h>

#include "ofdev.h"

int net_mountroot(void);

extern char     rootpath[FNAME_SIZE];

static  int netdev_sock = -1;
static  int open_count;

/*
 * Called by devopen after it sets f->f_dev to our devsw entry.
 * This opens the low-level device and sets f->f_devdata.
 */
int
net_open(struct of_dev *op)
{
        int error = 0;

        /*
         * On first open, do netif open, mount, etc.
         */
        if (open_count == 0) {
                /* Find network interface. */
                if ((netdev_sock = netif_open(op)) < 0) {
                        error = errno;
                        goto bad;
                }
                if ((error = net_mountroot()) != 0)
                        goto bad;
        }
        open_count++;
bad:
        if (netdev_sock >= 0 && open_count == 0) {
                netif_close(netdev_sock);
                netdev_sock = -1;
        }
        return error;
}

void
net_close(struct of_dev *op)
{
        /*
         * On last close, do netif close, etc.
         */
        if (open_count > 0)
                if (--open_count == 0) {
                        netif_close(netdev_sock);
                        netdev_sock = -1;
                }
}

int
net_mountroot()
{

#ifdef  DEBUG
        printf("net_mountroot\n");
#endif

        /*
         * Get info for NFS boot: our IP address, out hostname,
         * server IP address, and our root path on the server.
         * We use BOOTP (RFC951, RFC1532) exclusively as mandated
         * by PowerPC Reference Platform Specification I.4.2
         */

        bootp(netdev_sock);

        if (myip.s_addr == 0)
                return ETIMEDOUT;

        printf("Using IP address: %s\n", inet_ntoa(myip));

#ifdef  DEBUG
        printf("myip: %s (%s)", hostname, inet_ntoa(myip));
        if (gateip.s_addr)
                printf(", gateip: %s", inet_ntoa(gateip));
        if (netmask)
                printf(", netmask: %s", intoa(netmask));
        printf("\n");
#endif
        printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);

        /*
         * Get the NFS file handle (mount).
         */
        if (nfs_mount(netdev_sock, rootip, rootpath) < 0)
                return errno;
        return 0;
}