265 lines
6.8 KiB
C
265 lines
6.8 KiB
C
/* $NetBSD: dev_net.c,v 1.1 2002/11/09 06:20:41 cgd Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* 4. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Gordon W. Ross
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This module implements a "raw device" interface suitable for
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* use by the stand-alone I/O library NFS code. This interface
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* does not support any "block" access, and exists only for the
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* purpose of initializing the network interface, getting boot
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* parameters, and performing the NFS mount.
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*
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* At open time, this does:
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*
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* find interface - netif_open()
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* RARP for IP address - rarp_getipaddress()
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* RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
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* RPC/mountd - nfs_mount(sock, ip, path)
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*
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* the root file handle from mountd is saved in a global
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* for use by the NFS open code (NFS/lookup).
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*/
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#include <machine/stdarg.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <lib/libsa/stand.h>
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#include <lib/libsa/net.h>
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#include <lib/libsa/netif.h>
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#include <lib/libsa/bootparam.h>
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#include <lib/libsa/nfs.h>
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#include <lib/libkern/libkern.h>
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#include <lib/libsa/dev_net.h>
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#ifndef SUN_BOOTPARAMS
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void bootp __P((int));
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#endif
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extern int debug;
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extern int nfs_root_node[]; /* XXX - get from nfs_mount() */
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/*
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* Various globals needed by the network code:
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*/
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#if 0
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/* for arp.c, rarp.c */
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u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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#endif
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struct in_addr myip; /* my ip address */
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struct in_addr rootip; /* root ip address */
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struct in_addr gateip; /* swap ip address */
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n_long netmask; /* subnet or net mask */
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char rootpath[FNAME_SIZE];
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int hostnamelen;
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char hostname[FNAME_SIZE];
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int domainnamelen;
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char domainname[FNAME_SIZE];
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/*
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* Local things...
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*/
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static int netdev_sock = -1;
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static int netdev_opens;
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int net_getparams __P((int));
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/*
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* Called by devopen after it sets f->f_dev to our devsw entry.
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* This opens the low-level device and sets f->f_devdata.
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* This is declared with variable arguments...
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*/
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int
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net_open(struct open_file *f, ...)
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{
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va_list ap;
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char *devname; /* Device part of file name (or NULL). */
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int error = 0;
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va_start(ap, f);
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devname = va_arg(ap, char*);
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va_end(ap);
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#ifdef NETIF_DEBUG
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if (debug)
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printf("net_open: %s\n", devname);
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#endif
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/* On first open, do netif open, mount, etc. */
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if (netdev_opens == 0) {
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/* Find network interface. */
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if (netdev_sock < 0) {
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netdev_sock = netif_open(devname);
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if (netdev_sock < 0) {
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printf("net_open: netif_open() failed\n");
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return (ENXIO);
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}
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if (debug)
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printf("net_open: netif_open() succeeded\n");
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}
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if (rootip.s_addr == 0) {
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/* Get root IP address, and path, etc. */
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error = net_getparams(netdev_sock);
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if (error) {
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/* getparams makes its own noise */
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goto fail;
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}
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/* Get the NFS file handle (mountd). */
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error = nfs_mount(netdev_sock, rootip, rootpath);
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if (error) {
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error = errno;
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printf("net_open: NFS mount error=%d\n", error);
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rootip.s_addr = 0;
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fail:
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netif_close(netdev_sock);
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netdev_sock = -1;
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return (error);
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}
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if (debug)
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printf("net_open: NFS mount succeeded\n");
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}
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}
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netdev_opens++;
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f->f_devdata = nfs_root_node;
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return (error);
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}
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int
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net_close(f)
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struct open_file *f;
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{
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#ifdef NETIF_DEBUG
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if (debug)
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printf("net_close: opens=%d\n", netdev_opens);
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#endif
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/* On last close, do netif close, etc. */
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f->f_devdata = NULL;
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/* Extra close call? */
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if (netdev_opens <= 0)
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return (0);
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netdev_opens--;
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/* Not last close? */
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if (netdev_opens > 0)
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return(0);
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rootip.s_addr = 0;
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if (netdev_sock >= 0) {
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if (debug)
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printf("net_close: calling netif_close()\n");
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netif_close(netdev_sock);
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netdev_sock = -1;
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}
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return (0);
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}
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int
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net_ioctl(struct open_file *a, u_long b, void *c)
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{
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return EIO;
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}
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int
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net_strategy(void *a, int b, daddr_t c, size_t d, void *e, size_t *f)
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{
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return EIO;
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}
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int
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net_getparams(sock)
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int sock;
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{
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/*
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* Get info for NFS boot: our IP address, our hostname,
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* server IP address, and our root path on the server.
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* There are two ways to do this: The old, Sun way,
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* and the more modern, BOOTP way. (RFC951, RFC1048)
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*/
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#ifdef SUN_BOOTPARAMS
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/* Get our IP address. (rarp.c) */
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if (rarp_getipaddress(sock)) {
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printf("net_open: RARP failed\n");
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return (EIO);
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}
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#else /* BOOTPARAMS */
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/*
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* Get boot info using BOOTP. (RFC951, RFC1048)
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* This also gets the server IP address, gateway,
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* root path, etc.
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*/
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bootp(sock);
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if (myip.s_addr == 0) {
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printf("net_open: BOOTP failed\n");
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return (EIO);
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}
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#endif /* BOOTPARAMS */
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printf("boot: client addr: %s\n", inet_ntoa(myip));
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#ifdef SUN_BOOTPARAMS
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/* Get our hostname, server IP address, gateway. */
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if (bp_whoami(sock)) {
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printf("net_open: bootparam/whoami RPC failed\n");
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return (EIO);
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}
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#endif /* BOOTPARAMS */
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printf("boot: client name: %s\n", hostname);
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if (gateip.s_addr) {
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printf("boot: subnet mask: %s\n", intoa(netmask));
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printf("boot: net gateway: %s\n", inet_ntoa(gateip));
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}
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#ifdef SUN_BOOTPARAMS
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/* Get the root pathname. */
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if (bp_getfile(sock, "root", &rootip, rootpath)) {
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printf("net_open: bootparam/getfile RPC failed\n");
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return (EIO);
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}
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#endif /* BOOTPARAMS */
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printf("boot: server addr: %s\n", inet_ntoa(rootip));
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printf("boot: server path: %s\n", rootpath);
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return (0);
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}
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