* $Id: libnet_build_vrrp.c,v 1.21 2005/11/29 21:48:50 carlosc Exp $
* libnet_build_vrrp.c - VRRP 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_vrrp(u_int8_t version
, u_int8_t type
, u_int8_t vrouter_id
,
u_int8_t priority
, u_int8_t ip_count
, u_int8_t auth_type
, u_int8_t advert_int
,
u_int16_t sum
, u_int8_t
*payload
, u_int32_t payload_s
, libnet_t
*l
,
struct libnet_vrrp_hdr vrrp_hdr
;
n
= LIBNET_VRRP_H
+ payload_s
;
h
= LIBNET_VRRP_H
+ payload_s
;
* Find the existing protocol block if a ptag is specified, or create
p
= libnet_pblock_probe(l
, ptag
, n
, LIBNET_PBLOCK_VRRP_H
);
memset(&vrrp_hdr
, 0, sizeof(vrrp_hdr
));
vrrp_hdr
.vrrp_v
= version
;
vrrp_hdr
.vrrp_vrouter_id
= vrouter_id
;
vrrp_hdr
.vrrp_priority
= priority
;
vrrp_hdr
.vrrp_ip_count
= ip_count
;
vrrp_hdr
.vrrp_auth_type
= auth_type
;
vrrp_hdr
.vrrp_advert_int
= advert_int
;
vrrp_hdr
.vrrp_sum
= (sum
? htons(sum
) : 0);
n
= libnet_pblock_append(l
, p
, (u_int8_t
*)&vrrp_hdr
, LIBNET_VRRP_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
);
* If checksum is zero, by default libnet will compute a checksum
* for the user. The programmer can override this by calling
* libnet_toggle_checksum(l, ptag, 1);
libnet_pblock_setflags(p
, LIBNET_PBLOCK_DO_CHECKSUM
);
return (ptag
? ptag
: libnet_pblock_update(l
, p
, h
, LIBNET_PBLOCK_VRRP_H
));
libnet_pblock_delete(l
, p
);