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/*
* libnet
* libnet_build_sebek.c - sebek packet assembler
*
* Copyright (c) 2004 Frederic Raynal <pappy@security-labs.org>
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "common.h"
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)
{
uint32_t n;
libnet_pblock_t *p;
struct libnet_sebek_hdr sebek_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_SEBEK_H + payload_s; /* size of memory block */
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_SEBEK_H);
if (p == NULL)
{
return (-1);
}
memset(&sebek_hdr, 0, sizeof(sebek_hdr));
sebek_hdr.magic = htonl(magic);
sebek_hdr.version = htons(version);
sebek_hdr.type = htons(type);
sebek_hdr.counter = htonl(counter);
sebek_hdr.time_sec = htonl(time_sec);
sebek_hdr.time_usec = htonl(time_usec);
sebek_hdr.pid = htonl(pid);
sebek_hdr.uid = htonl(uid);
sebek_hdr.fd = htonl(fd);
memcpy(sebek_hdr.cmd, cmd, SEBEK_CMD_LENGTH*sizeof(uint8_t));
sebek_hdr.length = htonl(length);
n = libnet_pblock_append(l, p, (uint8_t *)&sebek_hdr, LIBNET_SEBEK_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, 0, LIBNET_PBLOCK_SEBEK_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
/* EOF */
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