1 files changed, 85 insertions, 0 deletions
diff --git a/src/usr/fetch.c b/src/usr/fetch.c
new file mode 100644
index 000000000..f7f3a771e
--- /dev/null
+++ b/src/usr/fetch.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2007 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
+ *
+ * Fetch file as executable/loadable image
+ *
+ */
+
+#include <libgen.h>
+#include <vsprintf.h>
+#include <gpxe/emalloc.h>
+#include <gpxe/ebuffer.h>
+#include <gpxe/image.h>
+#include <usr/fetch.h>
+
+#include <byteswap.h>
+#include <gpxe/tftp.h>
+#include <gpxe/dhcp.h>
+
+/**
+ * Fetch file as executable/loadable image
+ *
+ * @v image		Executable/loadable image
+ * @v filename		Filename
+ * @ret rc		Return status code
+ */
+int fetch ( struct image *image, const char *filename ) {
+	struct buffer buffer;
+	int rc;
+
+	/* Name the image, if it isn't explicitly named */
+	if ( ! image->name[0] ) {
+		strncpy ( image->name, basename ( filename ),
+			  ( sizeof ( image->name ) - 1 ) );
+	}
+
+	/* Allocate an expandable buffer to hold the file */
+	if ( ( rc = ebuffer_alloc ( &buffer, 0 ) ) != 0 )
+		return rc;
+
+	/* Retrieve the file */
+	struct tftp_session tftp;
+	union {
+		struct sockaddr_tcpip st;
+		struct sockaddr_in sin;
+	} server;
+
+	memset ( &tftp, 0, sizeof ( tftp ) );
+	memset ( &server, 0, sizeof ( server ) );
+	server.sin.sin_family = AF_INET;
+	find_global_dhcp_ipv4_option ( DHCP_EB_SIADDR,
+				       &server.sin.sin_addr );
+	server.sin.sin_port = htons ( TFTP_PORT );
+	udp_connect ( &tftp.udp, &server.st );
+	tftp.filename = filename;
+	tftp.buffer = &buffer;
+	if ( ( rc = async_wait ( tftp_get ( &tftp ) ) ) != 0 ) {
+		efree ( buffer.addr );
+		return rc;
+	}
+
+	/* Transfer ownserhip of the data buffer to the image */
+	image->data = buffer.addr;
+	image->len = buffer.fill;
+	image->free = efree;
+
+	return 0;
+}