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Annotation of embedaddon/libnet/src/libnet_build_sebek.c, revision 1.1.1.1

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 */