147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/* $NetBSD: devopen.c,v 1.7 2005/12/11 12:17:49 christos Exp $ */
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/*
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* Copyright 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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. 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 for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <lib/libsa/stand.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <net.h>
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#include <libi386.h>
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#ifdef _STANDALONE
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#include <lib/libkern/libkern.h>
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#include <bootinfo.h>
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#else
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#include <string.h>
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#endif
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#include "pxeboot.h"
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#ifdef _STANDALONE
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struct btinfo_bootpath bibp;
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#endif
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/*
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* Open the "device" named by the combined file system/file name
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* given as the fname arg. Format is:
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*
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* nfs:netbsd
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* tftp:netbsd
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* netbsd
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*
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* If no file system is specified, we default to the first in the
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* file system table (which ought to be NFS).
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*
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* We always open just one device (the PXE netif).
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*/
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int
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devopen(struct open_file *f, const char *fname, char **file)
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{
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struct devsw *dp;
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char *filename;
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size_t fsnamelen;
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int i, error;
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dp = &devsw[0];
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/* Set the default boot file system. */
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bcopy(pxeboot_fstab[0].fst_ops, file_system, sizeof(struct fs_ops));
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/* if we got passed a filename, pass it to the BOOTP server */
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if (fname)
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strncpy(bootfile, fname, FNAME_SIZE);
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/* Open the device; this might give us a boot file name. */
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error = (*dp->dv_open)(f, NULL);
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if (error)
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return (error);
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f->f_dev = dp;
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/*
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* If the DHCP server provided a file name:
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* - If it contains a ":", assume it points to a NetBSD kernel.
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* - If not, assume that the DHCP server was not able to pass
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* a separate filename for the kernel. (The name probably
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* was the same as used to load "pxeboot".) Ignore it and
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* use the default in this case.
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* So we cater to simple DHCP servers while being able to
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* use the power of conditional behaviour in modern ones.
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*/
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if (strchr(bootfile, ':'))
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fname = bootfile;
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filename = (fname ? strchr(fname, ':') : NULL);
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if (filename != NULL) {
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fsnamelen = (size_t)((const char *)filename - fname);
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for (i = 0; i < npxeboot_fstab; i++) {
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if (strncmp(fname, pxeboot_fstab[i].fst_name,
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fsnamelen) == 0) {
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bcopy(pxeboot_fstab[i].fst_ops, file_system,
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sizeof(struct fs_ops));
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break;
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}
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}
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if (i == npxeboot_fstab) {
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printf("Invalid file system type specified in %s\n",
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fname);
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error = EINVAL;
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goto bad;
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}
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filename++;
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if (filename[0] == '\0') {
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printf("No file specified in %s\n", fname);
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error = EINVAL;
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goto bad;
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}
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} else
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filename = (char *)fname;
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*file = filename;
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#ifdef _STANDALONE
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strncpy(bibp.bootpath, filename, sizeof(bibp.bootpath));
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BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
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#endif
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return (0);
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bad:
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(*dp->dv_close)(f);
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f->f_dev = NULL;
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return (error);
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}
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