160 lines
4.5 KiB
C
160 lines
4.5 KiB
C
/* $NetBSD: net.c,v 1.4 1997/03/15 18:10:43 is 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 <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 "if_ether.h"
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#include <netinet/in_systm.h>
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#include "stand.h"
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#include "net.h"
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#include "netif.h"
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#include "bootparam.h"
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char rootpath[FNAME_SIZE];
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int netdev_sock = -1;
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static int open_count;
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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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*/
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int
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net_open(pd)
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struct promdata *pd;
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{
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int error = 0;
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/* On first open, do netif open, mount, etc. */
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if (open_count == 0) {
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/* Find network interface. */
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if ((netdev_sock = netif_open(pd)) < 0) {
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error = errno;
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goto bad;
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}
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if ((error = net_mountroot()) != 0)
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goto bad;
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}
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open_count++;
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bad:
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return (error);
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}
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int
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net_close(pd)
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struct promdata *pd;
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{
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/* On last close, do netif close, etc. */
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if (open_count > 0)
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if (--open_count == 0)
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netif_close(netdev_sock);
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}
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int
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net_mountroot()
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{
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#ifdef DEBUG
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printf("net_mountroot\n");
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#endif
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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 boot info using RARP and Sun bootparams. */
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/* Get our IP address. (rarp.c) */
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if (rarp_getipaddress(netdev_sock) == -1)
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return errno;
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printf("boot: client IP address: %s\n", inet_ntoa(myip));
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/* Get our hostname, server IP address. */
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if (bp_whoami(netdev_sock))
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return (errno);
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printf("boot: client name: %s\n", hostname);
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/* Get the root pathname. */
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if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
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return (errno);
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#else
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/* Get boot info using BOOTP way. (RFC951, RFC1048) */
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bootp(netdev_sock);
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printf("Using IP address: %s\n", inet_ntoa(myip));
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printf("myip: %s (%s)", hostname, inet_ntoa(myip));
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if (gateip)
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printf(", gateip: %s", inet_ntoa(gateip));
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if (netmask)
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printf(", netmask: %s", intoa(netmask));
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printf("\n");
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#endif
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printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
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/* Get the NFS file handle (mount). */
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if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
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return (errno);
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return 0;
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}
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