/* $NetBSD: net.c,v 1.8 2012/07/16 11:26:27 tsutsui 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/in_systm.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/net.h>
#include <lib/libsa/netif.h>
#include <lib/libsa/bootp.h>
#include <lib/libsa/bootparam.h>
#include <lib/libsa/nfs.h>
#include <lib/libkern/libkern.h>
#include "ofdev.h"
#include "net.h"
static int net_mountroot_bootparams(void);
static int net_mountroot_bootp(void);
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;
}
}
open_count++;
bad:
if (netdev_sock >= 0 && open_count == 0) {
netif_close(netdev_sock);
netdev_sock = -1;
}
return error;
}
int
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;
}
return 0;
}
static void
net_clear_params(void)
{
myip.s_addr = 0;
netmask = 0;
gateip.s_addr = 0;
*hostname = '\0';
rootip.s_addr = 0;
*rootpath = '\0';
}
int
net_mountroot_bootparams(void)
{
net_clear_params();
/* Get our IP address. (rarp.c) */
if (rarp_getipaddress(netdev_sock) == -1)
return (errno);
printf("Using BOOTPARAMS protocol:\n ip addr=%s\n", inet_ntoa(myip));
if (bp_whoami(netdev_sock))
return (errno);
printf(" hostname=%s\n", hostname);
if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
return (errno);
return (0);
}
int
net_mountroot_bootp(void)
{
int attempts;
/* We need a few attempts here as some DHCP servers
* require >1 packet and my wireless bridge is always
* in learning mode until the 2nd attempt ... */
for (attempts = 0; attempts < 3; attempts++) {
net_clear_params();
bootp(netdev_sock);
if (myip.s_addr != 0)
break;
}
if (myip.s_addr == 0)
return(ENOENT);
printf("Using BOOTP protocol:\n ip addr=%s\n", inet_ntoa(myip));
if (hostname[0])
printf(" hostname=%s\n", hostname);
if (netmask)
printf(" netmask=%s\n", intoa(netmask));
if (gateip.s_addr)
printf(" gateway=%s\n", inet_ntoa(gateip));
return (0);
}
/*
* libsa's tftp_open expects a pointer to netdev_sock, i.e. an (int *),
* in f_devdata, a pointer to which gets handed down from devopen().
*
* Do not expect booting via different methods to have the same
* requirements or semantics.
*
* net_tftp_bootp uses net_mountroot_bootp because that incidentially does
* most of what it needs to do. It of course in no manner actually mounts
* anything, all that routine actually does is prepare the socket for the
* necessary net access, and print info for the user.
*/
int
net_tftp_bootp(int **sock)
{
net_mountroot_bootp();
if (myip.s_addr == 0)
return(ENOENT);
*sock = &netdev_sock;
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);
printf(" root addr=%s\n 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);
}