/*
* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <gpxe/netdevice.h>
#include <gpxe/dhcp.h>
#include <gpxe/settings.h>
#include <gpxe/image.h>
#include <gpxe/sanboot.h>
#include <gpxe/uri.h>
#include <usr/ifmgmt.h>
#include <usr/route.h>
#include <usr/dhcpmgmt.h>
#include <usr/imgmgmt.h>
#include <usr/autoboot.h>
/** @file
*
* Automatic booting
*
*/
/** Time to wait for link-up */
#define LINK_WAIT_MS 15000
/** Shutdown flags for exit */
int shutdown_exit_flags = 0;
/**
* Identify the boot network device
*
* @ret netdev Boot network device
*/
static struct net_device * find_boot_netdev ( void ) {
return NULL;
}
/**
* Boot using next-server and filename
*
* @v filename Boot filename
* @ret rc Return status code
*/
int boot_next_server_and_filename ( struct in_addr next_server,
const char *filename ) {
struct uri *uri;
struct image *image;
char buf[ 23 /* tftp://xxx.xxx.xxx.xxx/ */ + strlen(filename) + 1 ];
int filename_is_absolute;
int rc;
/* Construct URI */
uri = parse_uri ( filename );
if ( ! uri ) {
printf ( "Out of memory\n" );
return -ENOMEM;
}
filename_is_absolute = uri_is_absolute ( uri );
uri_put ( uri );
if ( ! filename_is_absolute ) {
/* Construct a tftp:// URI for the filename. We can't
* just rely on the current working URI, because the
* relative URI resolution will remove the distinction
* between filenames with and without initial slashes,
* which is significant for TFTP.
*/
snprintf ( buf, sizeof ( buf ), "tftp://%s/%s",
inet_ntoa ( next_server ), filename );
filename = buf;
}
image = alloc_image();
if ( ! image ) {
printf ( "Out of memory\n" );
return -ENOMEM;
}
if ( ( rc = imgfetch ( image, filename,
register_and_autoload_image ) ) != 0 ) {
printf ( "Could not load %s: %s\n",
filename, strerror ( rc ) );
goto done;
}
if ( ( rc = imgexec ( image ) ) != 0 ) {
printf ( "Could not boot %s: %s\n",
filename, strerror ( rc ) );
goto done;
}
done:
image_put ( image );
return rc;
}
/**
* Boot using root path
*
* @v root_path Root path
* @ret rc Return status code
*/
int boot_root_path ( const char *root_path ) {
struct sanboot_protocol *sanboot;
/* Quick hack */
for_each_table_entry ( sanboot, SANBOOT_PROTOCOLS ) {
if ( strncmp ( root_path, sanboot->prefix,
strlen ( sanboot->prefix ) ) == 0 ) {
return sanboot->boot ( root_path );
}
}
return -ENOTSUP;
}
/**
* Boot from a network device
*
* @v netdev Network device
* @ret rc Return status code
*/
static int netboot ( struct net_device *netdev ) {
struct setting vendor_class_id_setting
= { .tag = DHCP_VENDOR_CLASS_ID };
struct setting pxe_discovery_control_setting
= { .tag = DHCP_PXE_DISCOVERY_CONTROL };
struct setting pxe_boot_menu_setting
= { .tag = DHCP_PXE_BOOT_MENU };
char buf[256];
struct in_addr next_server;
unsigned int pxe_discovery_control;
int rc;
/* Open device and display device status */
if ( ( rc = ifopen ( netdev ) ) != 0 )
return rc;
ifstat ( netdev );
/* Wait for link-up */
printf ( "Waiting for link-up on %s...", netdev->name );
if ( ( rc = iflinkwait ( netdev, LINK_WAIT_MS ) ) != 0 ) {
printf ( " no link detected\n" );
return rc;
}
printf ( " ok\n" );
/* Configure device via DHCP */
if ( ( rc = dhcp ( netdev ) ) != 0 )
return rc;
route();
/* Try PXE menu boot, if applicable */
fetch_string_setting ( NULL, &vendor_class_id_setting,
buf, sizeof ( buf ) );
pxe_discovery_control =
fetch_uintz_setting ( NULL, &pxe_discovery_control_setting );
if ( ( strcmp ( buf, "PXEClient" ) == 0 ) &&
setting_exists ( NULL, &pxe_boot_menu_setting ) &&
( ! ( ( pxe_discovery_control & PXEBS_SKIP ) &&
setting_exists ( NULL, &filename_setting ) ) ) ) {
printf ( "Booting from PXE menu\n" );
return pxe_menu_boot ( netdev );
}
/* Try to download and boot whatever we are given as a filename */
fetch_ipv4_setting ( NULL, &next_server_setting, &next_server );
fetch_string_setting ( NULL, &filename_setting, buf, sizeof ( buf ) );
if ( buf[0] ) {
printf ( "Booting from filename \"%s\"\n", buf );
return boot_next_server_and_filename ( next_server, buf );
}
/* No filename; try the root path */
fetch_string_setting ( NULL, &root_path_setting, buf, sizeof ( buf ) );
if ( buf[0] ) {
printf ( "Booting from root path \"%s\"\n", buf );
return boot_root_path ( buf );
}
printf ( "No filename or root path specified\n" );
return -ENOENT;
}
/**
* Close all open net devices
*
* Called before a fresh boot attempt in order to free up memory. We
* don't just close the device immediately after the boot fails,
* because there may still be TCP connections in the process of
* closing.
*/
static void close_all_netdevs ( void ) {
struct net_device *netdev;
for_each_netdev ( netdev ) {
ifclose ( netdev );
}
}
/**
* Boot the system
*/
void autoboot ( void ) {
struct net_device *boot_netdev;
struct net_device *netdev;
/* If we have an identifable boot device, try that first */
close_all_netdevs();
if ( ( boot_netdev = find_boot_netdev() ) )
netboot ( boot_netdev );
/* If that fails, try booting from any of the other devices */
for_each_netdev ( netdev ) {
if ( netdev == boot_netdev )
continue;
close_all_netdevs();
netboot ( netdev );
}
printf ( "No more network devices\n" );
}
