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/*
*
* libnet
* libnet_build_rpc.c - RPC packet assembler
*
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
* Jason Damron <jdamron@stackheap.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "common.h"
libnet_ptag_t
libnet_build_rpc_call(uint32_t rm, uint32_t xid, uint32_t prog_num,
uint32_t prog_vers, uint32_t procedure, uint32_t cflavor, uint32_t clength,
uint8_t *cdata, uint32_t vflavor, uint32_t vlength, const uint8_t *vdata,
const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_rpc_call_tcp_hdr rpc_hdr;
if (l == NULL)
{
return (-1);
}
/* Credential and Verifier buffers not yet implemented.
* n = LIBNET_RPC_CALL_H + clength + vlength + payload_s;
*/
if (rm)
{
n = LIBNET_RPC_CALL_TCP_H + payload_s;
}
else
{
n = LIBNET_RPC_CALL_H + payload_s;
}
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_RPC_CALL_H);
if (p == NULL)
{
return (-1);
}
memset(&rpc_hdr, 0, sizeof(rpc_hdr));
if (rm)
{
rpc_hdr.rpc_record_marking = htonl(rm + payload_s);
}
rpc_hdr.rpc_common.rpc_xid = htonl(xid);
rpc_hdr.rpc_common.rpc_type = LIBNET_RPC_CALL;
rpc_hdr.rpc_common.rpc_call.rpc_rpcvers = htonl(LIBNET_RPC_VERS);
rpc_hdr.rpc_common.rpc_call.rpc_prognum = htonl(prog_num);
rpc_hdr.rpc_common.rpc_call.rpc_vers = htonl(prog_vers);
rpc_hdr.rpc_common.rpc_call.rpc_procedure = htonl(procedure);
/* XXX Eventually should allow for opaque auth data. */
rpc_hdr.rpc_common.rpc_call.rpc_credentials.rpc_auth_flavor= htonl(cflavor);
rpc_hdr.rpc_common.rpc_call.rpc_credentials.rpc_auth_length= htonl(clength);
rpc_hdr.rpc_common.rpc_call.rpc_verifier.rpc_auth_flavor = htonl(vflavor);
rpc_hdr.rpc_common.rpc_call.rpc_verifier.rpc_auth_length = htonl(vlength);
if (rm)
{
n = libnet_pblock_append(l, p, (uint8_t *)&rpc_hdr,
LIBNET_RPC_CALL_TCP_H);
}
else
{
n = libnet_pblock_append(l, p, (uint8_t *)&rpc_hdr.rpc_common,
LIBNET_RPC_CALL_H);
}
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_RPC_CALL_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
/* EOF */
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