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

1.1     ! misho       1: /*
        !             2:  *  libnet
        !             3:  *  libnet_build_sebek.c - sebek packet assembler
        !             4:  *
        !             5:  *  Copyright (c) 2004 Frederic Raynal <pappy@security-labs.org>
        !             6:  *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
        !             7:  *  All rights reserved.
        !             8:  *
        !             9:  * Redistribution and use in source and binary forms, with or without
        !            10:  * modification, are permitted provided that the following conditions
        !            11:  * are met:
        !            12:  * 1. Redistributions of source code must retain the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer.
        !            14:  * 2. Redistributions in binary form must reproduce the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer in the
        !            16:  *    documentation and/or other materials provided with the distribution.
        !            17:  *
        !            18:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            19:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            20:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            21:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            22:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            23:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            24:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            25:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            26:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            27:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            28:  * SUCH DAMAGE.
        !            29:  *
        !            30:  */
        !            31: 
        !            32: #if (HAVE_CONFIG_H)
        !            33: #include "../include/config.h"
        !            34: #endif
        !            35: #if (!(_WIN32) || (__CYGWIN__)) 
        !            36: #include "../include/libnet.h"
        !            37: #else
        !            38: #include "../include/win32/libnet.h"
        !            39: #endif
        !            40: 
        !            41: libnet_ptag_t
        !            42: libnet_build_sebek(u_int32_t magic, u_int16_t version, u_int16_t type, 
        !            43: u_int32_t counter, u_int32_t time_sec, u_int32_t time_usec, u_int32_t pid,
        !            44: u_int32_t uid, u_int32_t fd, u_int8_t cmd[SEBEK_CMD_LENGTH], u_int32_t length,
        !            45: u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
        !            46: {
        !            47:     u_int32_t n;
        !            48:     libnet_pblock_t *p;
        !            49:     struct libnet_sebek_hdr sebek_hdr;
        !            50: 
        !            51:     if (l == NULL)
        !            52:     { 
        !            53:         return (-1);
        !            54:     } 
        !            55: 
        !            56:     n = LIBNET_SEBEK_H + payload_s;               /* size of memory block */
        !            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_SEBEK_H);
        !            63:     if (p == NULL)
        !            64:     {
        !            65:         return (-1);
        !            66:     }
        !            67: 
        !            68:     memset(&sebek_hdr, 0, sizeof(sebek_hdr));
        !            69:     sebek_hdr.magic     = htonl(magic);
        !            70:     sebek_hdr.version   = htons(version);
        !            71:     sebek_hdr.type      = htons(type);
        !            72:     sebek_hdr.counter   = htonl(counter);
        !            73:     sebek_hdr.time_sec  = htonl(time_sec);
        !            74:     sebek_hdr.time_usec = htonl(time_usec);
        !            75:     sebek_hdr.pid       = htonl(pid);
        !            76:     sebek_hdr.uid       = htonl(uid);
        !            77:     sebek_hdr.fd        = htonl(fd);
        !            78:     memcpy(sebek_hdr.cmd, cmd, SEBEK_CMD_LENGTH*sizeof(u_int8_t));
        !            79:     sebek_hdr.length = htonl(length);
        !            80: 
        !            81:     n = libnet_pblock_append(l, p, (u_int8_t *)&sebek_hdr, LIBNET_SEBEK_H);
        !            82:     if (n == -1)
        !            83:     {
        !            84:         goto bad;
        !            85:     }
        !            86: 
        !            87:     if ((payload && !payload_s) || (!payload && payload_s))
        !            88:     {
        !            89:         snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
        !            90:                 "%s(): payload inconsistency\n", __func__);
        !            91:         goto bad;
        !            92:     }
        !            93:  
        !            94:     if (payload && payload_s)
        !            95:     {
        !            96:         n = libnet_pblock_append(l, p, payload, payload_s);
        !            97:         if (n == -1)
        !            98:         {
        !            99:             goto bad;
        !           100:         }
        !           101:     }
        !           102:  
        !           103:     return (ptag ? ptag : libnet_pblock_update(l, p, 0, LIBNET_PBLOCK_SEBEK_H));
        !           104: bad:
        !           105:     libnet_pblock_delete(l, p);
        !           106:     return (-1);
        !           107: }
        !           108: /* EOF */