Return to libnet_advanced.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libnet / src

Annotation of embedaddon/libnet/src/libnet_advanced.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  *  $Id: libnet_advanced.c,v 1.7 2004/02/16 23:13:38 mike Exp $
        !             3:  *
        !             4:  *  libnet
        !             5:  *  libnet_advanced.c - Advanced routines
        !             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: int
        !            43: libnet_adv_cull_packet(libnet_t *l, u_int8_t **packet, u_int32_t *packet_s)
        !            44: {
        !            45:     *packet = NULL;
        !            46:     *packet_s = 0;
        !            47: 
        !            48:     if (l->injection_type != LIBNET_LINK_ADV)
        !            49:     {
        !            50:         snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
        !            51:                 "%s(): advanced link mode not enabled\n", __func__);
        !            52:         return (-1);
        !            53:     }
        !            54: 
        !            55:     /* checksums will be written in */
        !            56:     return (libnet_pblock_coalesce(l, packet, packet_s));
        !            57: }
        !            58: 
        !            59: int
        !            60: libnet_adv_cull_header(libnet_t *l, libnet_ptag_t ptag, u_int8_t **header,
        !            61:         u_int32_t *header_s)
        !            62: {
        !            63:     libnet_pblock_t *p;
        !            64: 
        !            65:     *header = NULL;
        !            66:     *header_s = 0;
        !            67: 
        !            68:     if (l->injection_type != LIBNET_LINK_ADV)
        !            69:     {
        !            70:         snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
        !            71:                 "%s(): advanced link mode not enabled\n", __func__);
        !            72:         return (-1);
        !            73:     }
        !            74: 
        !            75:     p = libnet_pblock_find(l, ptag);
        !            76:     if (p == NULL)
        !            77:     {
        !            78:         snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
        !            79:             "%s(): ptag not found, you sure it exists?\n", __func__);
        !            80:         return (-1);
        !            81:     }
        !            82:     *header   = p->buf;
        !            83:     *header_s = p->b_len;
        !            84: 
        !            85:     return (1);
        !            86: }
        !            87: 
        !            88: int
        !            89: libnet_adv_write_link(libnet_t *l, u_int8_t *packet, u_int32_t packet_s)
        !            90: {
        !            91:     int c;
        !            92: 
        !            93:     if (l->injection_type != LIBNET_LINK_ADV)
        !            94:     {
        !            95:         snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
        !            96:                 "%s(): advanced link mode not enabled\n", __func__);
        !            97:         return (-1);
        !            98:     }
        !            99:     c = libnet_write_link(l, packet, packet_s);
        !           100: 
        !           101:     /* do statistics */
        !           102:     if (c == packet_s)
        !           103:     {
        !           104:         l->stats.packets_sent++;
        !           105:         l->stats.bytes_written += c;
        !           106:     }
        !           107:     else
        !           108:     {
        !           109:         l->stats.packet_errors++;
        !           110:         /*
        !           111:          *  XXX - we probably should have a way to retrieve the number of
        !           112:          *  bytes actually written (since we might have written something).
        !           113:          */
        !           114:         if (c > 0)
        !           115:         {
        !           116:             l->stats.bytes_written += c;
        !           117:         }
        !           118:     }
        !           119:     return (c);
        !           120: }
        !           121: 
        !           122: void
        !           123: libnet_adv_free_packet(libnet_t *l, u_int8_t *packet)
        !           124: {
        !           125:     /*
        !           126:      *  Restore original pointer address so free won't complain about a
        !           127:      *  modified chunk pointer.
        !           128:      */
        !           129:     if (l->aligner > 0)
        !           130:     {
        !           131:         packet = packet - l->aligner;
        !           132:     }
        !           133:     free(packet);
        !           134: }
        !           135: 
        !           136: /* EOF */