ndr_basic.c

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/* 
   Unix SMB/CIFS implementation.

   routines for marshalling/unmarshalling basic types

   Copyright (C) Andrew Tridgell 2003
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

#define NDR_SVAL(ndr, ofs) (NDR_BE(ndr)?RSVAL(ndr->data,ofs):SVAL(ndr->data,ofs))
#define NDR_IVAL(ndr, ofs) (NDR_BE(ndr)?RIVAL(ndr->data,ofs):IVAL(ndr->data,ofs))
#define NDR_IVALS(ndr, ofs) (NDR_BE(ndr)?RIVALS(ndr->data,ofs):IVALS(ndr->data,ofs))
#define NDR_SSVAL(ndr, ofs, v) do { if (NDR_BE(ndr))  { RSSVAL(ndr->data,ofs,v); } else SSVAL(ndr->data,ofs,v); } while (0)
#define NDR_SIVAL(ndr, ofs, v) do { if (NDR_BE(ndr))  { RSIVAL(ndr->data,ofs,v); } else SIVAL(ndr->data,ofs,v); } while (0)
#define NDR_SIVALS(ndr, ofs, v) do { if (NDR_BE(ndr))  { RSIVALS(ndr->data,ofs,v); } else SIVALS(ndr->data,ofs,v); } while (0)


/*
  check for data leaks from the server by looking for non-zero pad bytes
  these could also indicate that real structure elements have been
  mistaken for padding in the IDL
*/
void ndr_check_padding(struct ndr_pull *ndr, size_t n)
{
	size_t ofs2 = (ndr->offset + (n-1)) & ~(n-1);
	int i;
	for (i=ndr->offset;i<ofs2;i++) {
		if (ndr->data[i] != 0) {
			break;
		}
	}
	if (i<ofs2) {
		DEBUG(0,("WARNING: Non-zero padding to %d: ", (int)n));
		for (i=ndr->offset;i<ofs2;i++) {
			DEBUG(0,("%02x ", ndr->data[i]));
		}
		DEBUG(0,("\n"));
	}

}

/*
  parse a int8_t
*/
NTSTATUS ndr_pull_int8(struct ndr_pull *ndr, int ndr_flags, int8_t *v)
{
	NDR_PULL_NEED_BYTES(ndr, 1);
	*v = (int8_t)CVAL(ndr->data, ndr->offset);
	ndr->offset += 1;
	return NT_STATUS_OK;
}

/*
  parse a uint8_t
*/
NTSTATUS ndr_pull_uint8(struct ndr_pull *ndr, int ndr_flags, uint8_t *v)
{
	NDR_PULL_NEED_BYTES(ndr, 1);
	*v = CVAL(ndr->data, ndr->offset);
	ndr->offset += 1;
	return NT_STATUS_OK;
}

/*
  parse a int16_t
*/
NTSTATUS ndr_pull_int16(struct ndr_pull *ndr, int ndr_flags, int16_t *v)
{
	NDR_PULL_ALIGN(ndr, 2);
	NDR_PULL_NEED_BYTES(ndr, 2);
	*v = (uint16_t)NDR_SVAL(ndr, ndr->offset);
	ndr->offset += 2;
	return NT_STATUS_OK;
}

/*
  parse a uint16_t
*/
NTSTATUS ndr_pull_uint16(struct ndr_pull *ndr, int ndr_flags, uint16_t *v)
{
	NDR_PULL_ALIGN(ndr, 2);
	NDR_PULL_NEED_BYTES(ndr, 2);
	*v = NDR_SVAL(ndr, ndr->offset);
	ndr->offset += 2;
	return NT_STATUS_OK;
}

/*
  parse a int32_t
*/
NTSTATUS ndr_pull_int32(struct ndr_pull *ndr, int ndr_flags, int32_t *v)
{
	NDR_PULL_ALIGN(ndr, 4);
	NDR_PULL_NEED_BYTES(ndr, 4);
	*v = NDR_IVALS(ndr, ndr->offset);
	ndr->offset += 4;
	return NT_STATUS_OK;
}

/*
  parse a uint32_t
*/
NTSTATUS ndr_pull_uint32(struct ndr_pull *ndr, int ndr_flags, uint32_t *v)
{
	NDR_PULL_ALIGN(ndr, 4);
	NDR_PULL_NEED_BYTES(ndr, 4);
	*v = NDR_IVAL(ndr, ndr->offset);
	ndr->offset += 4;
	return NT_STATUS_OK;
}

/*
  parse a pointer referent identifier
*/
NTSTATUS ndr_pull_generic_ptr(struct ndr_pull *ndr, uint32_t *v)
{
	NTSTATUS status;
	status = ndr_pull_uint32(ndr, NDR_SCALARS, v);
	if (NT_STATUS_IS_OK(status) && *v != 0) {
		ndr->ptr_count++;
	}
	return status;
}

/*
  parse a ref pointer referent identifier
*/
NTSTATUS ndr_pull_ref_ptr(struct ndr_pull *ndr, uint32_t *v)
{
	NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, v));
	/* ref pointers always point to data */
	*v = 1;
	return NT_STATUS_OK;
}

/*
  parse a udlong
*/
NTSTATUS ndr_pull_udlong(struct ndr_pull *ndr, int ndr_flags, uint64_t *v)
{
	NDR_PULL_ALIGN(ndr, 4);
	NDR_PULL_NEED_BYTES(ndr, 8);
	*v = NDR_IVAL(ndr, ndr->offset);
	*v |= (uint64_t)(NDR_IVAL(ndr, ndr->offset+4)) << 32;
	ndr->offset += 8;
	return NT_STATUS_OK;
}

/*
  parse a udlongr
*/
NTSTATUS ndr_pull_udlongr(struct ndr_pull *ndr, int ndr_flags, uint64_t *v)
{
	NDR_PULL_ALIGN(ndr, 4);
	NDR_PULL_NEED_BYTES(ndr, 8);
	*v = ((uint64_t)NDR_IVAL(ndr, ndr->offset)) << 32;
	*v |= NDR_IVAL(ndr, ndr->offset+4);
	ndr->offset += 8;
	return NT_STATUS_OK;
}

/*
  parse a dlong
*/
NTSTATUS ndr_pull_dlong(struct ndr_pull *ndr, int ndr_flags, int64_t *v)
{
	return ndr_pull_udlong(ndr, ndr_flags, (uint64_t *)v);
}

/*
  parse a hyper
*/
NTSTATUS ndr_pull_hyper(struct ndr_pull *ndr, int ndr_flags, uint64_t *v)
{
	NDR_PULL_ALIGN(ndr, 8);
	return ndr_pull_udlong(ndr, ndr_flags, v);
}

/*
  parse a pointer
*/
NTSTATUS ndr_pull_pointer(struct ndr_pull *ndr, int ndr_flags, void* *v)
{
	intptr_t h;
	NDR_PULL_ALIGN(ndr, sizeof(h));
	NDR_PULL_NEED_BYTES(ndr, sizeof(h));
	memcpy(&h, ndr->data+ndr->offset, sizeof(h));
	ndr->offset += sizeof(h);
	*v = (void *)h;
	return NT_STATUS_OK;	
}

/*
  pull a NTSTATUS
*/
NTSTATUS ndr_pull_NTSTATUS(struct ndr_pull *ndr, int ndr_flags, NTSTATUS *status)
{
	uint32_t v;
	NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &v));
	*status = NT_STATUS(v);
	return NT_STATUS_OK;
}

/*
  push a NTSTATUS
*/
NTSTATUS ndr_push_NTSTATUS(struct ndr_push *ndr, int ndr_flags, NTSTATUS status)
{
	return ndr_push_uint32(ndr, ndr_flags, NT_STATUS_V(status));
}

void ndr_print_NTSTATUS(struct ndr_print *ndr, const char *name, NTSTATUS r)
{
	ndr->print(ndr, "%-25s: %s", name, nt_errstr(r));
}

/*
  pull a WERROR
*/
NTSTATUS ndr_pull_WERROR(struct ndr_pull *ndr, int ndr_flags, WERROR *status)
{
	uint32_t v;
	NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &v));
	*status = W_ERROR(v);
	return NT_STATUS_OK;
}

/*
  push a WERROR
*/
NTSTATUS ndr_push_WERROR(struct ndr_push *ndr, int ndr_flags, WERROR status)
{
	return ndr_push_uint32(ndr, NDR_SCALARS, W_ERROR_V(status));
}

void ndr_print_WERROR(struct ndr_print *ndr, const char *name, WERROR r)
{
	ndr->print(ndr, "%-25s: %s", name, dos_errstr(r));
}

/*
  parse a set of bytes
*/
NTSTATUS ndr_pull_bytes(struct ndr_pull *ndr, uint8_t *data, uint32_t n)
{
	NDR_PULL_NEED_BYTES(ndr, n);
	memcpy(data, ndr->data + ndr->offset, n);
	ndr->offset += n;
	return NT_STATUS_OK;
}

/*
  pull an array of uint8
*/
NTSTATUS ndr_pull_array_uint8(struct ndr_pull *ndr, int ndr_flags, uint8_t *data, uint32_t n)
{
	if (!(ndr_flags & NDR_SCALARS)) {
		return NT_STATUS_OK;
	}
	return ndr_pull_bytes(ndr, data, n);
}

/*
  push a int8_t
*/
NTSTATUS ndr_push_int8(struct ndr_push *ndr, int ndr_flags, int8_t v)
{
	NDR_PUSH_NEED_BYTES(ndr, 1);
	SCVAL(ndr->data, ndr->offset, (uint8_t)v);
	ndr->offset += 1;
	return NT_STATUS_OK;
}

/*
  push a uint8_t
*/
NTSTATUS ndr_push_uint8(struct ndr_push *ndr, int ndr_flags, uint8_t v)
{
	NDR_PUSH_NEED_BYTES(ndr, 1);
	SCVAL(ndr->data, ndr->offset, v);
	ndr->offset += 1;
	return NT_STATUS_OK;
}

/*
  push a int16_t
*/
NTSTATUS ndr_push_int16(struct ndr_push *ndr, int ndr_flags, int16_t v)
{
	NDR_PUSH_ALIGN(ndr, 2);
	NDR_PUSH_NEED_BYTES(ndr, 2);
	NDR_SSVAL(ndr, ndr->offset, (uint16_t)v);
	ndr->offset += 2;
	return NT_STATUS_OK;
}

/*
  push a uint16_t
*/
NTSTATUS ndr_push_uint16(struct ndr_push *ndr, int ndr_flags, uint16_t v)
{
	NDR_PUSH_ALIGN(ndr, 2);
	NDR_PUSH_NEED_BYTES(ndr, 2);
	NDR_SSVAL(ndr, ndr->offset, v);
	ndr->offset += 2;
	return NT_STATUS_OK;
}

/*
  push a int32_t
*/
NTSTATUS ndr_push_int32(struct ndr_push *ndr, int ndr_flags, int32_t v)
{
	NDR_PUSH_ALIGN(ndr, 4);
	NDR_PUSH_NEED_BYTES(ndr, 4);
	NDR_SIVALS(ndr, ndr->offset, v);
	ndr->offset += 4;
	return NT_STATUS_OK;
}

/*
  push a uint32_t
*/
NTSTATUS ndr_push_uint32(struct ndr_push *ndr, int ndr_flags, uint32_t v)
{
	NDR_PUSH_ALIGN(ndr, 4);
	NDR_PUSH_NEED_BYTES(ndr, 4);
	NDR_SIVAL(ndr, ndr->offset, v);
	ndr->offset += 4;
	return NT_STATUS_OK;
}

/*
  push a udlong
*/
NTSTATUS ndr_push_udlong(struct ndr_push *ndr, int ndr_flags, uint64_t v)
{
	NDR_PUSH_ALIGN(ndr, 4);
	NDR_PUSH_NEED_BYTES(ndr, 8);
	NDR_SIVAL(ndr, ndr->offset, (v & 0xFFFFFFFF));
	NDR_SIVAL(ndr, ndr->offset+4, (v>>32));
	ndr->offset += 8;
	return NT_STATUS_OK;
}

/*
  push a udlongr
*/
NTSTATUS ndr_push_udlongr(struct ndr_push *ndr, int ndr_flags, uint64_t v)
{
	NDR_PUSH_ALIGN(ndr, 4);
	NDR_PUSH_NEED_BYTES(ndr, 8);
	NDR_SIVAL(ndr, ndr->offset, (v>>32));
	NDR_SIVAL(ndr, ndr->offset+4, (v & 0xFFFFFFFF));
	ndr->offset += 8;
	return NT_STATUS_OK;
}

/*
  push a dlong
*/
NTSTATUS ndr_push_dlong(struct ndr_push *ndr, int ndr_flags, int64_t v)
{
	return ndr_push_udlong(ndr, NDR_SCALARS, (uint64_t)v);
}

/*
  push a hyper
*/
NTSTATUS ndr_push_hyper(struct ndr_push *ndr, int ndr_flags, uint64_t v)
{
	NDR_PUSH_ALIGN(ndr, 8);
	return ndr_push_udlong(ndr, NDR_SCALARS, v);
}

/*
  push a pointer
*/
NTSTATUS ndr_push_pointer(struct ndr_push *ndr, int ndr_flags, void* v)
{
	intptr_t h = (intptr_t)v;
	NDR_PUSH_ALIGN(ndr, sizeof(h));
	NDR_PUSH_NEED_BYTES(ndr, sizeof(h));
	memcpy(ndr->data+ndr->offset, &h, sizeof(h));
	ndr->offset += sizeof(h);
	return NT_STATUS_OK;	
}