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/*
* 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 <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;
/* 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;
}
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