1 /*
2 * libnet
3 * libnet_build_sebek.c - sebek packet assembler
4 *
5 * Copyright (c) 2004 Frederic Raynal <pappy@security-labs.org>
6 * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 */
31
32 #if (HAVE_CONFIG_H)
33 #include "../include/config.h"
34 #endif
35 #if (!(_WIN32) || (__CYGWIN__))
36 #include "../include/libnet.h"
37 #else
38 #include "../include/win32/libnet.h"
39 #endif
40
41 libnet_ptag_t
libnet_build_sebek(uint32_t magic,uint16_t version,uint16_t type,uint32_t counter,uint32_t time_sec,uint32_t time_usec,uint32_t pid,uint32_t uid,uint32_t fd,uint8_t cmd[SEBEK_CMD_LENGTH],uint32_t length,const uint8_t * payload,uint32_t payload_s,libnet_t * l,libnet_ptag_t ptag)42 libnet_build_sebek(uint32_t magic, uint16_t version, uint16_t type,
43 uint32_t counter, uint32_t time_sec, uint32_t time_usec, uint32_t pid,
44 uint32_t uid, uint32_t fd, uint8_t cmd[SEBEK_CMD_LENGTH], uint32_t length,
45 const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
46 {
47 uint32_t n;
48 libnet_pblock_t *p;
49 struct libnet_sebek_hdr sebek_hdr;
50
51 if (l == NULL)
52 {
53 return (-1);
54 }
55
56 n = LIBNET_SEBEK_H + payload_s; /* size of memory 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_SEBEK_H);
63 if (p == NULL)
64 {
65 return (-1);
66 }
67
68 memset(&sebek_hdr, 0, sizeof(sebek_hdr));
69 sebek_hdr.magic = htonl(magic);
70 sebek_hdr.version = htons(version);
71 sebek_hdr.type = htons(type);
72 sebek_hdr.counter = htonl(counter);
73 sebek_hdr.time_sec = htonl(time_sec);
74 sebek_hdr.time_usec = htonl(time_usec);
75 sebek_hdr.pid = htonl(pid);
76 sebek_hdr.uid = htonl(uid);
77 sebek_hdr.fd = htonl(fd);
78 memcpy(sebek_hdr.cmd, cmd, SEBEK_CMD_LENGTH*sizeof(uint8_t));
79 sebek_hdr.length = htonl(length);
80
81 n = libnet_pblock_append(l, p, (uint8_t *)&sebek_hdr, LIBNET_SEBEK_H);
82 if (n == -1)
83 {
84 goto bad;
85 }
86
87 /* boilerplate payload sanity check / append macro */
88 LIBNET_DO_PAYLOAD(l, p);
89
90 return (ptag ? ptag : libnet_pblock_update(l, p, 0, LIBNET_PBLOCK_SEBEK_H));
91 bad:
92 libnet_pblock_delete(l, p);
93 return (-1);
94 }
95 /* EOF */
96