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/*
* $Id: libnet_build_rip.c,v 1.8 2004/01/03 20:31:01 mike Exp $
*
* libnet
* libnet_build_rip.c - RIP packet assembler
*
* 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.
*
*/
#if (HAVE_CONFIG_H)
#include "../include/config.h"
#endif
#if (!(_WIN32) || (__CYGWIN__))
#include "../include/libnet.h"
#else
#include "../include/win32/libnet.h"
#endif
libnet_ptag_t
libnet_build_rip(u_int8_t cmd, u_int8_t version, u_int16_t rd, u_int16_t af, u_int16_t rt,
u_int32_t addr, u_int32_t mask, u_int32_t next_hop, u_int32_t metric,
u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
u_int32_t n, h;
libnet_pblock_t *p;
struct libnet_rip_hdr rip_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_RIP_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_RIP_H);
if (p == NULL)
{
return (-1);
}
memset(&rip_hdr, 0, sizeof(rip_hdr));
rip_hdr.rip_cmd = cmd;
rip_hdr.rip_ver = version;
rip_hdr.rip_rd = htons(rd);
rip_hdr.rip_af = htons(af);
rip_hdr.rip_rt = htons(rt);
rip_hdr.rip_addr = htonl(addr);
rip_hdr.rip_mask = htonl(mask);
rip_hdr.rip_next_hop = htonl(next_hop);
rip_hdr.rip_metric = htonl(metric);
n = libnet_pblock_append(l, p, (u_int8_t *)&rip_hdr, LIBNET_RIP_H);
if (n == -1)
{
goto bad;
}
if ((payload && !payload_s) || (!payload && payload_s))
{
snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
"%s(): payload inconsistency\n", __func__);
goto bad;
}
if (payload && payload_s)
{
n = libnet_pblock_append(l, p, payload, payload_s);
if (n == -1)
{
goto bad;
}
}
return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_RIP_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
/* EOF */
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