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1.1.6

    1: /*
    2:  *  $Id: libnet_build_802.2.c,v 1.1.1.2 2013/07/22 11:54:42 misho Exp $
    3:  *
    4:  *  libnet
    5:  *  libnet_build_802.2.c - 802.2 packet assembler
    6:  *
    7:  *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
    8:  *  All rights reserved.
    9:  *
   10:  * Redistribution and use in source and binary forms, with or without
   11:  * modification, are permitted provided that the following conditions
   12:  * are met:
   13:  * 1. Redistributions of source code must retain the above copyright
   14:  *    notice, this list of conditions and the following disclaimer.
   15:  * 2. Redistributions in binary form must reproduce the above copyright
   16:  *    notice, this list of conditions and the following disclaimer in the
   17:  *    documentation and/or other materials provided with the distribution.
   18:  *
   19:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29:  * SUCH DAMAGE.
   30:  *
   31:  */
   32: 
   33: #if (HAVE_CONFIG_H)
   34: #include "../include/config.h"
   35: #endif
   36: #if (!(_WIN32) || (__CYGWIN__)) 
   37: #include "../include/libnet.h"
   38: #else
   39: #include "../include/win32/libnet.h"
   40: #endif
   41: 
   42: libnet_ptag_t
   43: libnet_build_802_2(uint8_t dsap, uint8_t ssap, uint8_t control, 
   44: const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
   45: {
   46:     uint32_t n, h;
   47:     libnet_pblock_t *p;
   48:     struct libnet_802_2_hdr _802_2_hdr;
   49: 
   50:     if (l == NULL)
   51:     { 
   52:         return (-1);
   53:     } 
   54: 
   55:     n = LIBNET_802_2_H + payload_s;
   56:     h = 0;
   57:  
   58:     /*
   59:      *  Find the existing protocol block if a ptag is specified, or create
   60:      *  a new one.
   61:      */
   62:     p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_802_2_H);
   63:     if (p == NULL)
   64:     {
   65:         return (-1);
   66:     }
   67: 
   68:     memset(&_802_2_hdr, 0, sizeof(_802_2_hdr));
   69:     _802_2_hdr.llc_dsap = dsap;
   70:     _802_2_hdr.llc_ssap = ssap;
   71:     _802_2_hdr.llc_control = control;
   72: 
   73:     n = libnet_pblock_append(l, p, (uint8_t *)&_802_2_hdr, LIBNET_802_2_H);
   74:     if (n == (uint32_t)-1)
   75:     {
   76:         goto bad;
   77:     }
   78: 
   79:     /* boilerplate payload sanity check / append macro */
   80:     LIBNET_DO_PAYLOAD(l, p);
   81: 
   82:     return (ptag ? ptag : libnet_pblock_update(l, p, h,
   83:             LIBNET_PBLOCK_802_2_H));
   84: bad:
   85:     libnet_pblock_delete(l, p);
   86:     return (-1);
   87: }
   88: 
   89: libnet_ptag_t
   90: libnet_build_802_2snap(uint8_t dsap, uint8_t ssap, uint8_t control,
   91: uint8_t *oui, uint16_t type, const uint8_t *payload, uint32_t payload_s,
   92: libnet_t *l, libnet_ptag_t ptag)
   93: {
   94:     uint32_t n, h;
   95:     libnet_pblock_t *p;
   96:     struct libnet_802_2snap_hdr _802_2_hdr;
   97: 
   98:     if (l == NULL)
   99:     { 
  100:         return (-1);
  101:     } 
  102: 
  103:     n = LIBNET_802_2SNAP_H + payload_s;
  104:     h = 0;
  105:  
  106:     /*
  107:      *  Find the existing protocol block if a ptag is specified, or create
  108:      *  a new one.
  109:      */
  110:     p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_802_2SNAP_H);
  111:     if (p == NULL)
  112:     {
  113:         return (-1);
  114:     }
  115: 
  116:     memset(&_802_2_hdr, 0, sizeof(_802_2_hdr));
  117:     _802_2_hdr.snap_dsap = dsap;
  118:     _802_2_hdr.snap_ssap = ssap;
  119:     _802_2_hdr.snap_control = control;
  120:     memcpy(_802_2_hdr.snap_oui, oui, 3);
  121:     _802_2_hdr.snap_type = htons(type);
  122: 
  123:     n = libnet_pblock_append(l, p, (uint8_t *)&_802_2_hdr, LIBNET_802_2SNAP_H);
  124:     if (n == -1)
  125:     {
  126:         goto bad;
  127:     }
  128: 
  129:     /* boilerplate payload sanity check / append macro */
  130:     LIBNET_DO_PAYLOAD(l, p);
  131:  
  132:     return (ptag ? ptag : libnet_pblock_update(l, p, h,
  133:             LIBNET_PBLOCK_802_2SNAP_H));
  134: bad:
  135:     libnet_pblock_delete(l, p);
  136:     return (-1);
  137: }
  138: 
  139: 
  140: /* EOF */