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110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/**
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* @file
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*
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* Fetch file as executable/loadable image
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*
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*/
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#include <errno.h>
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#include <vsprintf.h>
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#include <gpxe/emalloc.h>
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#include <gpxe/ebuffer.h>
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#include <gpxe/image.h>
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#include <gpxe/uri.h>
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#include <usr/fetch.h>
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#include <byteswap.h>
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#include <gpxe/dhcp.h>
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#include <gpxe/tftp.h>
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#include <gpxe/http.h>
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#include <gpxe/ftp.h>
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/**
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* Fetch file
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*
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* @v filename Filename to fetch
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* @ret data Loaded file
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* @ret len Length of loaded file
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* @ret rc Return status code
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*
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* Fetch file to an external buffer allocated with emalloc(). The
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* caller is responsible for eventually freeing the buffer with
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* efree().
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*/
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int fetch ( const char *uri_string, userptr_t *data, size_t *len ) {
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struct uri *uri;
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struct buffer buffer;
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int rc;
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/* Parse the URI */
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uri = parse_uri ( uri_string );
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if ( ! uri ) {
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rc = -ENOMEM;
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goto err_parse_uri;
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}
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/* Allocate an expandable buffer to hold the file */
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if ( ( rc = ebuffer_alloc ( &buffer, 0 ) ) != 0 ) {
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goto err_ebuffer_alloc;
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}
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#warning "Temporary pseudo-URL parsing code"
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/* Retrieve the file */
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struct async async;
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int ( * download ) ( struct uri *uri, struct buffer *buffer,
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struct async *parent );
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if ( ! uri->scheme ) {
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download = tftp_get;
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} else {
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if ( strcmp ( uri->scheme, "http" ) == 0 ) {
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download = http_get;
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} else if ( strcmp ( uri->scheme, "ftp" ) == 0 ) {
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download = ftp_get;
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} else {
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download = tftp_get;
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}
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}
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if ( ( rc = async_block ( &async,
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download ( uri, &buffer, &async ) ) ) != 0 )
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goto err;
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/* Fill in buffer address and length */
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*data = buffer.addr;
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*len = buffer.fill;
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/* Release temporary resources. The ebuffer storage is now
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* owned by our caller, so we don't free it.
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*/
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free_uri ( uri );
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return 0;
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err:
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efree ( buffer.addr );
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err_ebuffer_alloc:
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free_uri ( uri );
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err_parse_uri:
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return rc;
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}
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