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Annotation of embedaddon/libnet/src/libnet_build_802.2.c, revision 1.1.1.2

1.1       misho       1: /*
1.1.1.2 ! misho       2:  *  $Id: libnet_build_802.2.c,v 1.11 2004/04/13 17:32:28 mike Exp $
1.1       misho       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
1.1.1.2 ! misho      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)
1.1       misho      45: {
1.1.1.2 ! misho      46:     uint32_t n, h;
1.1       misho      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: 
1.1.1.2 ! misho      73:     n = libnet_pblock_append(l, p, (uint8_t *)&_802_2_hdr, LIBNET_802_2_H);
        !            74:     if (n == (uint32_t)-1)
1.1       misho      75:     {
                     76:         goto bad;
                     77:     }
                     78: 
1.1.1.2 ! misho      79:     /* boilerplate payload sanity check / append macro */
        !            80:     LIBNET_DO_PAYLOAD(l, p);
1.1       misho      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
1.1.1.2 ! misho      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)
1.1       misho      93: {
1.1.1.2 ! misho      94:     uint32_t n, h;
1.1       misho      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: 
1.1.1.2 ! misho     116:     memset(&_802_2_hdr, 0, sizeof(_802_2_hdr));
        !           117:     _802_2_hdr.snap_dsap = dsap;
1.1       misho     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: 
1.1.1.2 ! misho     123:     n = libnet_pblock_append(l, p, (uint8_t *)&_802_2_hdr, LIBNET_802_2SNAP_H);
1.1       misho     124:     if (n == -1)
                    125:     {
                    126:         goto bad;
                    127:     }
                    128: 
1.1.1.2 ! misho     129:     /* boilerplate payload sanity check / append macro */
        !           130:     LIBNET_DO_PAYLOAD(l, p);
        !           131:  
1.1       misho     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 */