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Annotation of embedaddon/libnet/src/libnet_build_802.2.c, revision 1.1.1.3

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: 
1.1.1.3 ! misho      33: #include "common.h"
1.1       misho      34: 
                     35: libnet_ptag_t
1.1.1.2   misho      36: libnet_build_802_2(uint8_t dsap, uint8_t ssap, uint8_t control, 
                     37: const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
1.1       misho      38: {
1.1.1.2   misho      39:     uint32_t n, h;
1.1       misho      40:     libnet_pblock_t *p;
                     41:     struct libnet_802_2_hdr _802_2_hdr;
                     42: 
                     43:     if (l == NULL)
                     44:     { 
                     45:         return (-1);
                     46:     } 
                     47: 
                     48:     n = LIBNET_802_2_H + payload_s;
                     49:     h = 0;
                     50:  
                     51:     /*
                     52:      *  Find the existing protocol block if a ptag is specified, or create
                     53:      *  a new one.
                     54:      */
                     55:     p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_802_2_H);
                     56:     if (p == NULL)
                     57:     {
                     58:         return (-1);
                     59:     }
                     60: 
                     61:     memset(&_802_2_hdr, 0, sizeof(_802_2_hdr));
                     62:     _802_2_hdr.llc_dsap = dsap;
                     63:     _802_2_hdr.llc_ssap = ssap;
                     64:     _802_2_hdr.llc_control = control;
                     65: 
1.1.1.2   misho      66:     n = libnet_pblock_append(l, p, (uint8_t *)&_802_2_hdr, LIBNET_802_2_H);
                     67:     if (n == (uint32_t)-1)
1.1       misho      68:     {
                     69:         goto bad;
                     70:     }
                     71: 
1.1.1.2   misho      72:     /* boilerplate payload sanity check / append macro */
                     73:     LIBNET_DO_PAYLOAD(l, p);
1.1       misho      74: 
                     75:     return (ptag ? ptag : libnet_pblock_update(l, p, h,
                     76:             LIBNET_PBLOCK_802_2_H));
                     77: bad:
                     78:     libnet_pblock_delete(l, p);
                     79:     return (-1);
                     80: }
                     81: 
                     82: libnet_ptag_t
1.1.1.2   misho      83: libnet_build_802_2snap(uint8_t dsap, uint8_t ssap, uint8_t control,
                     84: uint8_t *oui, uint16_t type, const uint8_t *payload, uint32_t payload_s,
                     85: libnet_t *l, libnet_ptag_t ptag)
1.1       misho      86: {
1.1.1.2   misho      87:     uint32_t n, h;
1.1       misho      88:     libnet_pblock_t *p;
                     89:     struct libnet_802_2snap_hdr _802_2_hdr;
                     90: 
                     91:     if (l == NULL)
                     92:     { 
                     93:         return (-1);
                     94:     } 
                     95: 
                     96:     n = LIBNET_802_2SNAP_H + payload_s;
                     97:     h = 0;
                     98:  
                     99:     /*
                    100:      *  Find the existing protocol block if a ptag is specified, or create
                    101:      *  a new one.
                    102:      */
                    103:     p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_802_2SNAP_H);
                    104:     if (p == NULL)
                    105:     {
                    106:         return (-1);
                    107:     }
                    108: 
1.1.1.2   misho     109:     memset(&_802_2_hdr, 0, sizeof(_802_2_hdr));
                    110:     _802_2_hdr.snap_dsap = dsap;
1.1       misho     111:     _802_2_hdr.snap_ssap = ssap;
                    112:     _802_2_hdr.snap_control = control;
                    113:     memcpy(_802_2_hdr.snap_oui, oui, 3);
                    114:     _802_2_hdr.snap_type = htons(type);
                    115: 
1.1.1.2   misho     116:     n = libnet_pblock_append(l, p, (uint8_t *)&_802_2_hdr, LIBNET_802_2SNAP_H);
1.1       misho     117:     if (n == -1)
                    118:     {
                    119:         goto bad;
                    120:     }
                    121: 
1.1.1.2   misho     122:     /* boilerplate payload sanity check / append macro */
                    123:     LIBNET_DO_PAYLOAD(l, p);
                    124:  
1.1       misho     125:     return (ptag ? ptag : libnet_pblock_update(l, p, h,
                    126:             LIBNET_PBLOCK_802_2SNAP_H));
                    127: bad:
                    128:     libnet_pblock_delete(l, p);
                    129:     return (-1);
                    130: }
                    131: 
1.1.1.3 ! misho     132: /**
        !           133:  * Local Variables:
        !           134:  *  indent-tabs-mode: nil
        !           135:  *  c-file-style: "stroustrup"
        !           136:  * End:
        !           137:  */