* $Id: libnet_build_ntp.c,v 1.20 2005/11/29 22:05:10 carlosc Exp $
* libnet_build_ntp.c - NTP packet assembler
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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
#include "../include/config.h"
#if (!(_WIN32) || (__CYGWIN__))
#include "../include/libnet.h"
#include "../include/win32/libnet.h"
libnet_build_ntp(u_int8_t leap_indicator
, u_int8_t version
, u_int8_t mode
,
u_int8_t stratum
, u_int8_t poll
, u_int8_t precision
, u_int16_t delay_int
,
u_int16_t delay_frac
, u_int16_t dispersion_int
, u_int16_t dispersion_frac
,
u_int32_t reference_id
, u_int32_t ref_ts_int
, u_int32_t ref_ts_frac
,
u_int32_t orig_ts_int
, u_int32_t orig_ts_frac
, u_int32_t rec_ts_int
,
u_int32_t rec_ts_frac
, u_int32_t xmt_ts_int
, u_int32_t xmt_ts_frac
,
u_int8_t
*payload
, u_int32_t payload_s
, libnet_t
*l
, libnet_ptag_t ptag
)
struct libnet_ntp_hdr ntp_hdr
;
n
= LIBNET_NTP_H
+ payload_s
;
* Find the existing protocol block if a ptag is specified, or create
p
= libnet_pblock_probe(l
, ptag
, n
, LIBNET_PBLOCK_NTP_H
);
memset(&ntp_hdr
, 0, sizeof(ntp_hdr
));
ntp_hdr
.ntp_li_vn_mode
= LIBNET_NTP_DO_LI_VN_MODE(
leap_indicator
, version
, mode
);
ntp_hdr
.ntp_stratum
= stratum
;
ntp_hdr
.ntp_precision
= precision
;
ntp_hdr
.ntp_delay
.integer
= htons(delay_int
);
ntp_hdr
.ntp_delay
.fraction
= htons(delay_frac
);
ntp_hdr
.ntp_dispersion
.integer
= htons(dispersion_int
);
ntp_hdr
.ntp_dispersion
.fraction
= htons(dispersion_frac
);
ntp_hdr
.ntp_reference_id
= htonl(reference_id
);
ntp_hdr
.ntp_ref_ts
.integer
= htonl(ref_ts_int
);
ntp_hdr
.ntp_ref_ts
.fraction
= htonl(ref_ts_frac
);
ntp_hdr
.ntp_orig_ts
.integer
= htonl(orig_ts_int
);
ntp_hdr
.ntp_orig_ts
.fraction
= htonl(orig_ts_frac
);
ntp_hdr
.ntp_rec_ts
.integer
= htonl(orig_ts_int
);
ntp_hdr
.ntp_rec_ts
.fraction
= htonl(orig_ts_frac
);
ntp_hdr
.ntp_xmt_ts
.integer
= htonl(xmt_ts_int
);
ntp_hdr
.ntp_xmt_ts
.fraction
= htonl(xmt_ts_frac
);
n
= libnet_pblock_append(l
, p
, (u_int8_t
*)&ntp_hdr
, LIBNET_NTP_H
);
if ((payload
&& !payload_s
) || (!payload
&& payload_s
))
snprintf(l
->err_buf
, LIBNET_ERRBUF_SIZE
,
"%s(): payload inconsistency\n", __func__
);
if (payload
&& payload_s
)
n
= libnet_pblock_append(l
, p
, payload
, payload_s
);
return (ptag
? ptag
: libnet_pblock_update(l
, p
, h
, LIBNET_PBLOCK_NTP_H
));
libnet_pblock_delete(l
, p
);