/*
* Copyright (c) 1995 Gordon W. Ross
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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()
* RARP for IP address - rarp_getipaddress()
* RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
* RPC/mountd - nfs_mount(sock, ip, path)
*
* the root file handle from mountd is saved in a global
* for use by the NFS open code (NFS/lookup).
*/
static int net_mountroot_bootparams(void);
static int net_mountroot_bootp(void);
/*
* 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 promdata *pd)
{
int error = 0;
/* On first open, do netif open, mount, etc. */
if (open_count == 0) {
/* Find network interface. */
if ((netdev_sock = netif_open(pd)) < 0) {
error = errno;
goto bad;
}
if ((error = net_mountroot()) != 0)
goto bad;
}
open_count++;
bad:
return (error);
}
int
net_close(struct promdata *pd)
{
/* On last close, do netif close, etc. */
if (open_count <= 0)
return (0);
if (--open_count == 0)
return (netif_close(netdev_sock));
return (0);
}
int
net_mountroot_bootparams(void)
{
printf("Trying BOOTPARAMS protocol... ");
/* Get our IP address. (rarp.c) */
if (rarp_getipaddress(netdev_sock) == -1)
return (errno);
printf("ip address: %s", inet_ntoa(myip));
/* Get our hostname, server IP address. */
if (bp_whoami(netdev_sock))
return (errno);
printf(", hostname: %s\n", hostname);
/* Get the root pathname. */
if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
return (errno);
return (0);
}
int
net_mountroot_bootp(void)
{
printf("Trying BOOTP protocol... ");
bootp(netdev_sock);
if (myip.s_addr == 0)
return(ENOENT);
printf("ip address: %s", inet_ntoa(myip));
if (hostname[0])
printf(", hostname: %s", hostname);
if (netmask)
printf(", netmask: %s", intoa(netmask));
if (gateip.s_addr)
printf(", gateway: %s", inet_ntoa(gateip));
printf("\n");
return (0);
}
int
net_mountroot(void)
{
int error;
#ifdef DEBUG
printf("net_mountroot\n");
#endif
/*
* Get info for NFS boot: our IP address, our hostname,
* server IP address, and our root path on the server.
* There are two ways to do this: The old, Sun way,
* and the more modern, BOOTP way. (RFC951, RFC1048)
*/
/* Try BOOTP first */
error = net_mountroot_bootp();
/* Historically, we've used BOOTPARAMS, so try that next */
if (error != 0)
error = net_mountroot_bootparams();
if (error != 0)
return (error);
