1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* 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 <errno.h>
#include <vsprintf.h>
#include <gpxe/emalloc.h>
#include <gpxe/ebuffer.h>
#include <gpxe/image.h>
#include <gpxe/uri.h>
#include <usr/fetch.h>
#include <byteswap.h>
#include <gpxe/dhcp.h>
#include <gpxe/tftp.h>
#include <gpxe/http.h>
/**
* Fetch file
*
* @v filename Filename to fetch
* @ret data Loaded file
* @ret len Length of loaded file
* @ret rc Return status code
*
* Fetch file to an external buffer allocated with emalloc(). The
* caller is responsible for eventually freeing the buffer with
* efree().
*/
int fetch ( const char *uri_string, userptr_t *data, size_t *len ) {
struct uri *uri;
struct buffer buffer;
int rc;
/* Parse the URI */
uri = parse_uri ( uri_string );
if ( ! uri ) {
rc = -ENOMEM;
goto err_parse_uri;
}
/* Allocate an expandable buffer to hold the file */
if ( ( rc = ebuffer_alloc ( &buffer, 0 ) ) != 0 ) {
goto err_ebuffer_alloc;
}
#warning "Temporary pseudo-URL parsing code"
/* Retrieve the file */
struct async async;
int ( * download ) ( struct uri *uri, struct buffer *buffer,
struct async *parent );
#if 0
server.sin.sin_port = htons ( TFTP_PORT );
udp_connect ( &tftp.udp, &server.st );
tftp.filename = filename;
tftp.buffer = &buffer;
aop = tftp_get ( &tftp );
#else
download = http_get;
#endif
async_init_orphan ( &async );
if ( ( rc = download ( uri, &buffer, &async ) ) != 0 )
goto err;
async_wait ( &async, &rc, 1 );
if ( rc != 0 )
goto err;
/* Fill in buffer address and length */
*data = buffer.addr;
*len = buffer.fill;
/* Release temporary resources. The ebuffer storage is now
* owned by our caller, so we don't free it.
*/
free_uri ( uri );
return 0;
err:
efree ( buffer.addr );
err_ebuffer_alloc:
free_uri ( uri );
err_parse_uri:
return rc;
}
|
