1 files changed, 233 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/usr/autoboot.c b/contrib/syslinux-4.02/gpxe/src/usr/autoboot.c
new file mode 100644
index 0000000..2fa10e6
--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/usr/autoboot.c
@@ -0,0 +1,233 @@
+/*
+ * 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#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
+ *
+ */
+
+/** 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/ */ +
+		  ( 3 * strlen(filename) ) /* completely URI-encoded */
+		  + 1 /* NUL */ ];
+	int filename_is_absolute;
+	int rc;
+
+	/* Construct URI */
+	uri = parse_uri ( filename );
+	if ( ! uri )
+		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/",
+			   inet_ntoa ( next_server ) );
+		uri_encode ( filename, buf + strlen ( buf ),
+			     sizeof ( buf ) - strlen ( buf ), URI_PATH );
+		filename = buf;
+	}
+
+	image = alloc_image();
+	if ( ! image )
+		return -ENOMEM;
+	if ( ( rc = imgfetch ( image, filename,
+			       register_and_autoload_image ) ) != 0 ) {
+		goto done;
+	}
+	if ( ( rc = imgexec ( image ) ) != 0 )
+		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 );
+
+	/* 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 ) && pxe_menu_boot != NULL &&
+	     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 );
+		if ( ( rc = boot_next_server_and_filename ( next_server,
+							    buf ) ) != 0 ) {
+			printf ( "Could not boot from filename \"%s\": %s\n",
+				 buf, strerror ( rc ) );
+			return rc;
+		}
+		return 0;
+	}
+	
+	/* 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 );
+		if ( ( rc = boot_root_path ( buf ) ) != 0 ) {
+			printf ( "Could not boot from root path \"%s\": %s\n",
+				 buf, strerror ( rc ) );
+			return rc;
+		}
+		return 0;
+	}
+
+	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" );
+}