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/* $NetBSD: dev_net.c,v 1.12 1997/12/10 20:38:37 gwr Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gordon W. Ross.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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).
*/
#include <machine/stdarg.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include "stand.h"
#include "net.h"
#include "netif.h"
#include "nfs.h"
#include "bootparam.h"
#include "dev_net.h"
static int netdev_sock = -1;
static int netdev_opens;
static int net_getparams(int sock);
static void net_print(int verbose);
struct devsw netdev = {
"net",
DEVT_NET,
net_init,
net_strategy,
net_open,
net_close,
noioctl
net_print,
};
/*
* Print stuff about our net 'device'.
*/
static void
net_print(int verbose)
{
pager_output(" net: network interface");
/* XXX much more verbose stuff here */
}
/*
* Called by devopen after it sets f->f_dev to our devsw entry.
* This opens the low-level device and sets f->f_devdata.
* This is declared with variable arguments...
*/
int
net_open(struct open_file *f, void *vdev)
{
char *devname; /* Device part of file name (or NULL). */
int error = 0;
devname = vdev;
#ifdef NETIF_DEBUG
if (debug)
printf("net_open: %s\n", devname);
#endif
/* On first open, do netif open, mount, etc. */
if (netdev_opens == 0) {
/* Find network interface. */
if (netdev_sock < 0) {
netdev_sock = netif_open(devname);
if (netdev_sock < 0) {
printf("net_open: netif_open() failed\n");
return (ENXIO);
}
if (debug)
printf("net_open: netif_open() succeeded\n");
}
if (rootip.s_addr == 0) {
/* Get root IP address, and path, etc. */
error = net_getparams(netdev_sock);
if (error) {
/* getparams makes its own noise */
netif_close(netdev_sock);
netdev_sock = -1;
return (error);
}
}
}
netdev_opens++;
return (error);
}
int
net_close(f)
struct open_file *f;
{
#ifdef NETIF_DEBUG
if (debug)
printf("net_close: opens=%d\n", netdev_opens);
#endif
/* On last close, do netif close, etc. */
f->f_devdata = NULL;
/* Extra close call? */
if (netdev_opens <= 0)
return (0);
netdev_opens--;
/* Not last close? */
if (netdev_opens > 0)
return(0);
rootip.s_addr = 0;
if (netdev_sock >= 0) {
if (debug)
printf("net_close: calling netif_close()\n");
netif_close(netdev_sock);
netdev_sock = -1;
}
return (0);
}
int
net_ioctl()
{
return EIO;
}
int
net_strategy()
{
return EIO;
}
/*
* 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)
*
* The default is to use the Sun bootparams RPC
* (because that is what the kernel will do).
* MD code can make try_bootp initialied data,
* which will override this common definition.
*/
#ifdef SUPPORT_BOOTP
int try_bootp;
int bootp(int sock);
#endif
static int
net_getparams(sock)
int sock;
{
char buf[MAXHOSTNAMELEN];
n_long smask;
#ifdef SUPPORT_BOOTP
/*
* Try to get boot info using BOOTP. If we succeed, then
* the server IP address, gateway, and root path will all
* be initialized. If any remain uninitialized, we will
* use RARP and RPC/bootparam (the Sun way) to get them.
*/
if (try_bootp)
bootp(sock);
if (myip.s_addr != 0)
return (0);
if (debug)
printf("net_open: BOOTP failed, trying RARP/RPC...\n");
#endif
/*
* Use RARP to get our IP address. This also sets our
* netmask to the "natural" default for our address.
*/
if (rarp_getipaddress(sock)) {
printf("net_open: RARP failed\n");
return (EIO);
}
printf("net_open: client addr: %s\n", inet_ntoa(myip));
/* Get our hostname, server IP address, gateway. */
if (bp_whoami(sock)) {
printf("net_open: bootparam/whoami RPC failed\n");
return (EIO);
}
printf("net_open: client name: %s\n", hostname);
/*
* Ignore the gateway from whoami (unreliable).
* Use the "gateway" parameter instead.
*/
smask = 0;
gateip.s_addr = 0;
if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
/* Got it! Parse the netmask. */
smask = ip_convertaddr(buf);
}
if (smask) {
netmask = smask;
printf("net_open: subnet mask: %s\n", intoa(netmask));
}
if (gateip.s_addr)
printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
/* Get the root server and pathname. */
if (bp_getfile(sock, "root", &rootip, rootpath)) {
printf("net_open: bootparam/getfile RPC failed\n");
return (EIO);
}
printf("net_open: server addr: %s\n", inet_ntoa(rootip));
printf("net_open: server path: %s\n", rootpath);
return (0);
}
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