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1.1.6

    1: /*
    2:  *
    3:  *  libnet
    4:  *  libnet_build_rpc.c - RPC packet assembler
    5:  *
    6:  *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
    7:  *                            Jason Damron <jdamron@stackheap.org>
    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
   43: libnet_build_rpc_call(uint32_t rm, uint32_t xid, uint32_t prog_num, 
   44: uint32_t prog_vers, uint32_t procedure, uint32_t cflavor, uint32_t clength, 
   45: uint8_t *cdata, uint32_t vflavor, uint32_t vlength, const uint8_t *vdata, 
   46: const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
   47: {
   48:     uint32_t n, h;
   49:     libnet_pblock_t *p;
   50:     struct libnet_rpc_call_tcp_hdr rpc_hdr;
   51: 
   52:     if (l == NULL)
   53:     { 
   54:         return (-1);
   55:     } 
   56: 
   57:     /* Credential and Verifier buffers not yet implemented.
   58:      * n = LIBNET_RPC_CALL_H + clength + vlength + payload_s;
   59:      */
   60: 
   61:     if (rm)
   62:     {
   63:         n = LIBNET_RPC_CALL_TCP_H + payload_s;
   64:     } 
   65:     else
   66:     {
   67:         n = LIBNET_RPC_CALL_H + payload_s;
   68:     }
   69:  
   70:     h = 0;
   71: 
   72:     /*
   73:      *  Find the existing protocol block if a ptag is specified, or create
   74:      *  a new one.
   75:      */
   76:     p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_RPC_CALL_H);
   77:     if (p == NULL)
   78:     {
   79:         return (-1);
   80:     }
   81: 
   82:     memset(&rpc_hdr, 0, sizeof(rpc_hdr));
   83:     if (rm)
   84:     {
   85:        rpc_hdr.rpc_record_marking                 = htonl(rm + payload_s);
   86:     }
   87:     rpc_hdr.rpc_common.rpc_xid                    = htonl(xid);
   88:     rpc_hdr.rpc_common.rpc_type                   = LIBNET_RPC_CALL;
   89:     rpc_hdr.rpc_common.rpc_call.rpc_rpcvers       = htonl(LIBNET_RPC_VERS);
   90:     rpc_hdr.rpc_common.rpc_call.rpc_prognum       = htonl(prog_num);
   91:     rpc_hdr.rpc_common.rpc_call.rpc_vers          = htonl(prog_vers);
   92:     rpc_hdr.rpc_common.rpc_call.rpc_procedure     = htonl(procedure);
   93:     /*  XXX Eventually should allow for opaque auth data. */
   94:     rpc_hdr.rpc_common.rpc_call.rpc_credentials.rpc_auth_flavor= htonl(cflavor);
   95:     rpc_hdr.rpc_common.rpc_call.rpc_credentials.rpc_auth_length= htonl(clength);
   96:     rpc_hdr.rpc_common.rpc_call.rpc_verifier.rpc_auth_flavor   = htonl(vflavor);
   97:     rpc_hdr.rpc_common.rpc_call.rpc_verifier.rpc_auth_length   = htonl(vlength);
   98: 
   99:     if (rm)
  100:     {
  101:         n = libnet_pblock_append(l, p, (uint8_t *)&rpc_hdr, 
  102:                 LIBNET_RPC_CALL_TCP_H);
  103:     }
  104:     else
  105:     {
  106:         n = libnet_pblock_append(l, p, (uint8_t *)&rpc_hdr.rpc_common, 
  107:                 LIBNET_RPC_CALL_H);
  108:     }
  109: 
  110:     if (n == -1)
  111:     {
  112:         goto bad;
  113:     }
  114:  
  115:     /* boilerplate payload sanity check / append macro */
  116:     LIBNET_DO_PAYLOAD(l, p);
  117: 
  118:     return (ptag ? ptag : libnet_pblock_update(l, p, h,
  119:             LIBNET_PBLOCK_RPC_CALL_H));
  120: bad:
  121:     libnet_pblock_delete(l, p);
  122:     return (-1);
  123: }
  124: 
  125: /* EOF */