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/* $NetBSD: dev_net.c,v 1.4 1996/01/29 23:54:15 gwr Exp $ */
/*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* 4. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Gordon W. Ross
*
* 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).
*/
#include <stdarg.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>
#include "stand.h"
#include "net.h"
#include "netif.h"
#include "bootparam.h"
#include "dev_net.h"
extern int debug;
extern int nfs_root_node[]; /* XXX - get from nfs_mount() */
/*
* Various globals needed by the network code:
*/
/* for arp.c, rarp.c */
u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
struct in_addr myip; /* my ip address */
struct in_addr rootip; /* root ip address */
struct in_addr gateip; /* swap ip address */
n_long netmask; /* subnet or net mask */
char rootpath[FNAME_SIZE];
int hostnamelen;
char hostname[FNAME_SIZE];
int domainnamelen;
char domainname[FNAME_SIZE];
/*
* Local things...
*/
static int netdev_sock = -1;
static int netdev_opens;
/*
* 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, ...)
{
va_list ap;
char *devname; /* Device part of file name (or NULL). */
int error = 0;
va_start(ap, f);
devname = va_arg(ap, char*);
va_end(ap);
#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 */
goto fail;
}
/* Get the NFS file handle (mountd). */
error = nfs_mount(netdev_sock, rootip, rootpath);
if (error) {
printf("net_open: NFS mount error=%d\n", error);
rootip.s_addr = 0;
fail:
netif_close(netdev_sock);
netdev_sock = -1;
return (error);
}
if (debug)
printf("net_open: NFS mount succeeded\n");
}
}
netdev_opens++;
f->f_devdata = nfs_root_node;
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;
}
int
net_getparams(sock)
int sock;
{
/*
* 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)
*/
#ifdef SUN_BOOTPARAMS
/* Get our IP address. (rarp.c) */
if (rarp_getipaddress(sock)) {
printf("net_open: RARP failed\n");
return (EIO);
}
#else /* BOOTPARAMS */
/*
* Get boot info using BOOTP. (RFC951, RFC1048)
* This also gets the server IP address, gateway,
* root path, etc.
*/
bootp(sock);
if (myip.s_addr == 0) {
printf("net_open: BOOTP failed\n");
return (EIO);
}
#endif /* BOOTPARAMS */
printf("boot: client addr: %s\n", inet_ntoa(myip));
#ifdef SUN_BOOTPARAMS
/* Get our hostname, server IP address, gateway. */
if (bp_whoami(sock)) {
printf("net_open: bootparam/whoami RPC failed\n");
return (EIO);
}
#endif /* BOOTPARAMS */
printf("boot: client name: %s\n", hostname);
if (gateip.s_addr) {
printf("boot: subnet mask: %s\n", intoa(netmask));
printf("boot: net gateway: %s\n", inet_ntoa(gateip));
}
#ifdef SUN_BOOTPARAMS
/* Get the root pathname. */
if (bp_getfile(sock, "root", &rootip, rootpath)) {
printf("net_open: bootparam/getfile RPC failed\n");
return (EIO);
}
#endif /* BOOTPARAMS */
printf("boot: server addr: %s\n", inet_ntoa(rootip));
printf("boot: server path: %s\n", rootpath);
return (0);
}
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