1 /*
2 * $Id: libnet_build_data.c,v 1.7 2004/04/13 17:32:28 mike Exp $
3 *
4 * libnet
5 * libnet_build_data.c - generic data block builder
6 *
7 * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 #if (HAVE_CONFIG_H)
34 #include "../include/config.h"
35 #endif
36 #if (!(_WIN32) || (__CYGWIN__))
37 #include "../include/libnet.h"
38 #else
39 #include "../include/win32/libnet.h"
40 #endif
41
42 /* FIXME this won't work with TCP or IPv4 data, which is probably a bug */
43 libnet_ptag_t
libnet_build_data(const uint8_t * payload,uint32_t payload_s,libnet_t * l,libnet_ptag_t ptag)44 libnet_build_data(const uint8_t *payload, uint32_t payload_s, libnet_t *l,
45 libnet_ptag_t ptag)
46 {
47 uint32_t n, h;
48 libnet_pblock_t *p;
49
50 if (l == NULL)
51 {
52 return (-1);
53 }
54
55 n = payload_s;
56 h = 0; /* no checksum on generic block */
57
58 /*
59 * Find the existing protocol block if a ptag is specified, or create
60 * a new one.
61 */
62 p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_DATA_H);
63 if (p == NULL)
64 {
65 return (-1);
66 }
67
68 /* boilerplate payload sanity check / append macro */
69 LIBNET_DO_PAYLOAD(l, p);
70
71 return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_DATA_H));
72 bad:
73 libnet_pblock_delete(l, p);
74 return (-1);
75 }
76
77 /* EOF */
78