Initial commit of OpenSPARC T2 design and verification files.

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

/*
*  $Id: libnet_build_arp.c,v 1.20 2005/11/29 22:16:29 carlosc Exp $
*
*  libnet
*  libnet_build_arp.c - ARP 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_arp(u_int16_t hrd, u_int16_t pro, u_int8_t hln, u_int8_t pln,
u_int16_t op, u_int8_t *sha, u_int8_t *spa, u_int8_t *tha, u_int8_t *tpa,
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_arp_hdr arp_hdr;

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

   n = LIBNET_ARP_H + (2 * hln) + (2 * pln) + payload_s;
   h = 0;  /* ARP headers have no checksum */

   /*
    *  Find the existing protocol block if a ptag is specified, or create
    *  a new one.
    */
   p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_ARP_H);
   if (p == NULL)
   {
       return (-1);
   }

   memset(&arp_hdr, 0, sizeof(arp_hdr));
   arp_hdr.ar_hrd = htons(hrd);       /* hardware address type */
   arp_hdr.ar_pro = htons(pro);       /* protocol address type */
   arp_hdr.ar_hln = hln;              /* hardware address length */
   arp_hdr.ar_pln = pln;              /* protocol address length */
   arp_hdr.ar_op  = htons(op);        /* opcode command */

   n = libnet_pblock_append(l, p, (u_int8_t *)&arp_hdr, LIBNET_ARP_H);
   if (n == -1)
   {
       /* err msg set in libnet_pblock_append() */
       goto bad; 
   }
   n = libnet_pblock_append(l, p, sha, hln);
   if (n == -1)
   {
       /* err msg set in libnet_pblock_append() */
       goto bad;
   }
   n = libnet_pblock_append(l, p, spa, pln);
   if (n == -1)
   {
       /* err msg set in libnet_pblock_append() */
       goto bad;
   }
   n = libnet_pblock_append(l, p, tha, hln);
   if (n == -1)
   {
       /* err msg set in libnet_pblock_append() */
       goto bad;
   } 
   n = libnet_pblock_append(l, p, tpa, pln);
   if (n == -1)
   {
       /* err msg set in libnet_pblock_append() */
       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)
       {
           /* err msg set in libnet_pblock_append() */
           goto bad;
       }
   }

   return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_ARP_H));
bad:
   libnet_pblock_delete(l, p);
   return (-1);
}

libnet_ptag_t
libnet_autobuild_arp(u_int16_t op, u_int8_t *sha, u_int8_t *spa, u_int8_t *tha,
u_int8_t *tpa, libnet_t *l)
{
   u_short hrd;
   
   switch (l->link_type)
   {
       case 1: /* DLT_EN10MB */
           hrd = ARPHRD_ETHER;
           break;
       case 6: /* DLT_IEEE802 */
           hrd = ARPHRD_IEEE802; 
           break;
       default:
           hrd = 0;
           snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
                   "%s(): unsupported link type\n", __func__);
           return (-1);
       /* add other link-layers */
   }
   
   return (libnet_build_arp(
       hrd,                                    /* hardware addr */
       ETHERTYPE_IP,                           /* protocol addr */
       6,                                      /* hardware addr size */
       4,                                      /* protocol addr size */
       op,                                     /* operation type */
       sha,                                    /* sender hardware addr */
       spa,                       /* sender protocol addr */
       tha,                                    /* target hardware addr */
       tpa,                       /* target protocol addr */
       NULL,                                   /* payload */
       0,                                      /* payload size */
       l,                                      /* libnet context */
       0));                                    /* libnet id */
}

/* EOF */