Initial commit of OpenSPARC T2 design and verification files.

[OpenSPARC-T2-DV] / verif / env / common / vera / niu_ippktgen / C / libnet / src / libnet_build_ethernet.c

/*
*  $Id: libnet_build_ethernet.c,v 1.19 2005/11/29 22:50:14 carlosc Exp $
*
*  libnet
*  libnet_build_ethernet.c - ethernet 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_ethernet(u_int8_t *dst, u_int8_t *src, u_int16_t type, 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_ethernet_hdr eth_hdr;

   if (l == NULL)
   { 
       return (-1);
   } 

   /* sanity check injection type if we're not in advanced mode */
   if (l->injection_type != LIBNET_LINK &&
           !(((l->injection_type) & LIBNET_ADV_MASK)))
   {
        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
           "%s(): called with non-link layer wire injection primitive",
                   __func__);
       p = NULL;
       goto bad;
   }

   n = LIBNET_ETH_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_ETH_H);
   if (p == NULL)
   {
       return (-1);
   }

       memset(&eth_hdr, 0, sizeof(eth_hdr));
       memcpy(eth_hdr.ether_dhost, dst, ETHER_ADDR_LEN);  /* destination address */
   memcpy(eth_hdr.ether_shost, src, ETHER_ADDR_LEN);  /* source address */
   eth_hdr.ether_type = htons(type);                  /* packet type */

   n = libnet_pblock_append(l, p, (u_int8_t *)&eth_hdr, LIBNET_ETH_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_ETH_H));
bad:
   libnet_pblock_delete(l, p);
   return (-1);
}


libnet_ptag_t
libnet_autobuild_ethernet(u_int8_t *dst, u_int16_t type, libnet_t *l)
{
   u_int32_t n, h;
   struct libnet_ether_addr *src;
   libnet_pblock_t *p;
   libnet_ptag_t ptag;
   struct libnet_ethernet_hdr eth_hdr;

   if (l == NULL)
   { 
       return (-1);
   } 

   /* sanity check injection type if we're not in advanced mode */
   if (l->injection_type != LIBNET_LINK &&
           !(((l->injection_type) & LIBNET_ADV_MASK)))
   {
        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
           "libnet_autobuild_ethernet() called with non-link layer wire"
           " injection primitive");
       p = NULL;
       goto bad;
   }

   n = LIBNET_ETH_H;
   h = 0;
   ptag = LIBNET_PTAG_INITIALIZER;
   src = libnet_get_hwaddr(l);
   if (src == NULL)
   {
       /* err msg set in libnet_get_hwaddr() */
       return (-1);
   }

   /*
    *  Create a new pblock. 
    */
   p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_ETH_H);
   if (p == NULL)
   {
       return (-1);
   }

       memset(&eth_hdr, 0, sizeof(eth_hdr));
       memcpy(eth_hdr.ether_dhost, dst, ETHER_ADDR_LEN);  /* destination address */
   memcpy(eth_hdr.ether_shost, src, ETHER_ADDR_LEN);  /* source address */
   eth_hdr.ether_type = htons(type);                  /* packet type */

   n = libnet_pblock_append(l, p, (u_int8_t *)&eth_hdr, LIBNET_ETH_H);
   if (n == -1)
   {
       goto bad;
   }

   return (libnet_pblock_update(l, p, h, LIBNET_PBLOCK_ETH_H));
bad:
   libnet_pblock_delete(l, p);
   return (-1); 
}
/* EOF */